阅读说明：本技术 乘员舱和电池降温方法、装置以及车辆 (Passenger compartment and battery cooling method and device and vehicle ) 是由 胡康 于 2020-12-18 设计创作，主要内容包括：本申请实施例提供了一种乘员舱和电池降温方法、装置以及车辆,涉及电动汽车技术领域,本申请实施例能因时制宜的制定乘员舱和电池双制冷时的优先级策略,以使在有限的空调系统能力下,既能够满足电池的降温,又能够满足乘员舱的降温舒适性,同时又能够最大程度的节省整车能耗,将更多的整车能量用于车辆续航。该方法包括：确定车辆当前的驾驶阶段；根据驾驶阶段与降温策略之间的对应关系,查询所述车辆当前的驾驶阶段对应的目标降温策略,其中,不同驾驶阶段对应不同降温策略,每个降温策略均包括对乘员舱降温和对电池降温；按照所述目标降温策略,对乘员舱和/或电池降温。(The embodiment of the application provides a passenger cabin and battery cooling method, a passenger cabin and battery cooling device and a vehicle, and relates to the technical field of electric vehicles. The method comprises the following steps: determining the current driving stage of the vehicle; inquiring a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery; and cooling the passenger compartment and/or the battery according to the target cooling strategy.)

1. A passenger compartment and battery cooling method, the method comprising:

determining the current driving stage of the vehicle;

inquiring a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery;

and cooling the passenger compartment and/or the battery according to the target cooling strategy.

2. The method of claim 1, wherein the driving phase comprises a start-up phase,

determining a current driving phase of the vehicle, comprising:

when a triggering operation of the vehicle power-on starting is received, determining that the vehicle is currently in the starting stage;

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

and preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

3. The method of claim 2, wherein preferentially cooling only the battery according to the target cooling strategy corresponding to the start-up phase comprises:

determining the current temperature of the battery;

when the current temperature of the battery exceeds the first temperature threshold of the battery, only cooling the battery;

wherein, in the process of only cooling the passenger compartment, the method further comprises:

judging whether the current temperature of the battery exceeds a preset second temperature threshold of the battery, and switching to only cool the battery when the current temperature of the battery exceeds the second temperature threshold of the battery;

wherein the battery second temperature threshold is greater than the battery first temperature threshold.

4. The method according to claim 3, characterized in that the driving phases further comprise an operating phase,

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

when the current temperature of the battery does not exceed the first temperature threshold of the battery and the current temperature of the passenger compartment does not exceed the first temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to a target cooling strategy corresponding to the operation stage;

or, in the process of only cooling the passenger compartment, when the current temperature of the battery does not exceed the second temperature threshold of the battery and the current temperature of the passenger compartment is reduced to be less than or equal to the preset second temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to the target cooling strategy corresponding to the operation stage;

wherein the passenger compartment second temperature threshold is less than the passenger compartment first temperature threshold.

5. Method according to claim 1 or 4, characterized in that the driving phases comprise an operating phase,

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

and preferentially cooling the passenger compartment according to a target cooling strategy corresponding to the operation stage until the current temperature of the battery exceeds a preset third temperature threshold of the battery, and switching to cooling only the battery.

6. The method of claim 5, further comprising, during the cooling of the passenger compartment:

judging whether the current temperature of the battery exceeds a third temperature threshold of the battery;

when the current temperature of the battery does not exceed the third temperature threshold of the battery, inquiring a target battery request inlet water temperature corresponding to the current temperature of the battery according to the corresponding relation between the battery temperature and the battery request inlet water temperature, and cooling the battery and simultaneously keeping the current temperature of the passenger compartment not to exceed the preset third temperature threshold of the passenger compartment according to the target battery request inlet water temperature, wherein different temperature intervals of the battery correspond to different battery request inlet water temperatures.

7. The method of claim 6, wherein the correspondence between battery temperature and battery requested inlet water temperature comprises:

when the preset fourth temperature threshold of the battery is less than or equal to the battery temperature and less than the preset fifth temperature threshold of the battery, the battery requests that the inlet water temperature is a first temperature;

when the fifth temperature threshold value of the battery is not more than the battery temperature and is less than the preset sixth temperature threshold value of the battery, the temperature of the inlet water requested by the battery is a second temperature;

when the sixth temperature threshold of the battery is not more than the battery temperature and less than the third temperature threshold of the battery, the temperature of the inlet water requested by the battery is three;

wherein the temperature three is less than the temperature two is less than the temperature one.

8. A passenger compartment and battery cooling device, the device comprising:

the driving stage determining module is used for determining the current driving stage of the vehicle;

the target cooling strategy query module is used for querying a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery;

and the target cooling strategy execution module is used for cooling the passenger compartment and/or the battery according to the target cooling strategy.

9. The apparatus of claim 8, wherein the driving phase comprises a start-up phase,

the driving phase determination module includes:

the starting stage determining submodule is used for determining that the vehicle is currently in the starting stage when the triggering operation of power-on starting of the vehicle is received;

the target cooling strategy execution module comprises:

and the first execution submodule in the starting stage is used for preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

10. A vehicle comprising a passenger compartment, a battery, an air conditioning system, and a memory for storing controller-executable instructions;

a controller for performing the passenger compartment and battery cooling method of any one of claims 1 to 7 to control the air conditioning system to cool the passenger compartment and/or the battery.

Technical Field

The application relates to the technical field of electric automobiles, in particular to a passenger compartment and battery cooling method, a passenger compartment and battery cooling device and a vehicle.

Background

At present, the phenomenon of energy shortage is increasingly obvious, the call for developing new energy is stronger and stronger in all countries in the world, and China strongly supports the development of the new energy automobile industry through various policies. The development of new energy vehicles is mainly restricted by the development of batteries, and for the new energy vehicles, the cooling of the batteries is a difficult problem which is always troubling engineers, because the optimum temperature of the batteries is usually between 25 ℃ and 35 ℃, and the air conditioning system is used for cooling the batteries on the whole vehicle in the working interval, but when the environmental temperature is higher, the air conditioning system can hardly meet the condition that the batteries and the passenger compartment are cooled simultaneously, namely the so-called refrigeration double-opening working condition. If the requirements are met, the matched air conditioning system is expensive, the cost pressure is great for a whole vehicle factory, and from the energy consumption perspective, the air conditioning system with higher matching performance simultaneously meets the requirements of cooling a passenger cabin and a battery pack, so that the system is not economical, and particularly for a pure electric vehicle, the higher air conditioning energy consumption directly influences the cruising ability of the whole vehicle and can influence serious customer complaints.

Therefore, how to balance the cooling of the passenger compartment and the battery is a problem that needs to be solved.

Disclosure of Invention

The embodiment of the application provides a passenger compartment and battery cooling method, a device and a vehicle, so as to overcome the technical problems.

In order to solve the above problem, an embodiment of the present application discloses a passenger compartment and a battery cooling method from an aspect of the present application, the method including:

determining the current driving stage of the vehicle;

inquiring a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery;

and cooling the passenger compartment and/or the battery according to the target cooling strategy.

In one embodiment of the present application, the driving phase comprises a start-up phase,

determining a current driving phase of the vehicle, comprising:

when a triggering operation of the vehicle power-on starting is received, determining that the vehicle is currently in the starting stage;

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

and preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

In an embodiment of the present application, preferentially only cooling the battery according to the target cooling policy corresponding to the start stage includes:

determining the current temperature of the battery;

when the current temperature of the battery exceeds the first temperature threshold of the battery, only cooling the battery;

wherein, in the process of only cooling the passenger compartment, the method further comprises:

judging whether the current temperature of the battery exceeds a preset second temperature threshold of the battery, and switching to only cool the battery when the current temperature of the battery exceeds the second temperature threshold of the battery;

wherein the battery second temperature threshold is greater than the battery first temperature threshold.

In an embodiment of the application, the driving phase further comprises an operating phase,

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

when the current temperature of the battery does not exceed the first temperature threshold of the battery and the current temperature of the passenger compartment does not exceed the first temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to a target cooling strategy corresponding to the operation stage;

or, in the process of only cooling the passenger compartment, when the current temperature of the battery does not exceed the second temperature threshold of the battery and the current temperature of the passenger compartment is reduced to be less than or equal to the preset second temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to the target cooling strategy corresponding to the operation stage;

wherein the passenger compartment second temperature threshold is less than the passenger compartment first temperature threshold.

In one embodiment of the present application, the driving phases include an operating phase,

cooling the passenger compartment and/or the battery according to the target cooling strategy, comprising:

and preferentially cooling the passenger compartment according to a target cooling strategy corresponding to the operation stage until the current temperature of the battery exceeds a preset third temperature threshold of the battery, and switching to cooling only the battery.

In an embodiment of the present application, in the process of cooling the passenger compartment, the method further includes:

judging whether the current temperature of the battery exceeds a third temperature threshold of the battery;

when the current temperature of the battery does not exceed the third temperature threshold of the battery, inquiring a target battery request inlet water temperature corresponding to the current temperature of the battery according to the corresponding relation between the battery temperature and the battery request inlet water temperature, and cooling the battery and simultaneously keeping the current temperature of the passenger compartment not to exceed the preset third temperature threshold of the passenger compartment according to the target battery request inlet water temperature, wherein different temperature intervals of the battery correspond to different battery request inlet water temperatures.

In an embodiment of the present application, the correspondence between the battery temperature and the battery requested inlet water temperature includes:

when the preset fourth temperature threshold of the battery is less than or equal to the battery temperature and less than the preset fifth temperature threshold of the battery, the battery requests that the inlet water temperature is a first temperature;

when the fifth temperature threshold value of the battery is not more than the battery temperature and is less than the preset sixth temperature threshold value of the battery, the temperature of the inlet water requested by the battery is a second temperature;

when the sixth temperature threshold of the battery is not more than the battery temperature and less than the third temperature threshold of the battery, the temperature of the inlet water requested by the battery is three;

wherein the temperature three is less than the temperature two is less than the temperature one.

In order to solve the above problem, from another aspect of the present application, the embodiments of the present application further disclose a passenger compartment and battery cooling device, the device includes:

the driving stage determining module is used for determining the current driving stage of the vehicle;

the target cooling strategy query module is used for querying a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery;

and the target cooling strategy execution module is used for cooling the passenger compartment and/or the battery according to the target cooling strategy.

In one embodiment of the present application, the driving phase comprises a start-up phase,

the driving phase determination module includes:

the starting stage determining submodule is used for determining that the vehicle is currently in the starting stage when the triggering operation of power-on starting of the vehicle is received;

the target cooling strategy execution module comprises:

and the first execution submodule in the starting stage is used for preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

In order to solve the above problem, from yet another aspect of the present application, embodiments of the present application further disclose a vehicle comprising a passenger compartment, a battery, an air conditioning system, and a memory for storing controller executable instructions;

the controller is used for executing the passenger compartment and the battery cooling method according to the embodiment of the application to control the air conditioning system to cool the passenger compartment and/or the battery.

The embodiment of the application has the following advantages:

in the embodiment of the application, a target cooling strategy corresponding to the current driving stage of the vehicle is inquired according to the corresponding relation between the driving stage and the cooling strategy by determining the current driving stage of the vehicle, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling a passenger compartment and cooling a battery; finally, according to the target cooling strategy, the passenger compartment and/or the battery are cooled, and a strategy of cooling the passenger compartment and the battery according to conditions is realized, so that the cooling of the battery can be met under the limited capacity of an air conditioning system, the cooling comfort of the passenger compartment can be met, the energy consumption of the whole vehicle can be saved to the maximum extent, and more energy of the whole vehicle can be used for the vehicle endurance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart illustrating steps in a method for cooling a passenger compartment and a battery in accordance with an embodiment of the present disclosure;

FIG. 2 is a flowchart illustrating an exemplary implementation of a cooling strategy according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a vehicle according to an embodiment of the present disclosure;

FIG. 4 is a functional block diagram of a passenger compartment and a battery cooling device according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Aiming at the technical problems in the background technology of the embodiment of the application, the embodiment of the application provides a passenger cabin and a battery cooling method, which can adaptively change the priority strategy of cooling the passenger cabin and the battery according to different driving stages and different conditions in the driving stages, and can embody the thought principle of 'making things in place with time', so that the cooling of the battery can be met under the limited capacity of an air conditioning system, and the dynamic property of the whole vehicle and the service life of the battery are not influenced; the cooling comfort of the passenger compartment can be met, and customer complaints are not caused; meanwhile, the energy consumption of the whole vehicle can be saved to the maximum extent, more energy of the whole vehicle is used for vehicle endurance, and the flexibility is high. The cooling strategy according to the time and situation provided by the embodiment of the application provides the maximum matching performance boundary of the whole vehicle air conditioning system, and is beneficial to the cost control of the air conditioning system.

Referring to fig. 1, a flow chart illustrating steps of a method for cooling a passenger compartment and a battery according to an embodiment of the present application is shown, where the method may specifically include the following steps:

step S101, determining the current driving stage of the vehicle;

aiming at the actual condition of the whole vehicle, the driving stage is divided into two stages, namely a starting stage and an operation stage.

The start-up phase refers to the phase when the vehicle is just powered on, at which time the user may or may not be located in the passenger compartment. The power-ON means that the automobile ignition gear of the vehicle is in an opening state, namely in an IG-ON mode. In the IG-ON mode, the lamp ON the instrument panel is ON and all the electric appliances can operate.

The operation phase refers to the driving process after the vehicle is started, and the user is located in the passenger compartment for a long time.

For example, the vehicle system determines that the vehicle is currently in the starting stage when receiving a triggering operation of vehicle power-on starting.

Step S102, inquiring a target cooling strategy corresponding to the current driving stage of the vehicle according to the corresponding relation between the driving stages and the cooling strategies, wherein different driving stages correspond to different cooling strategies, and each cooling strategy comprises cooling of a passenger compartment and cooling of a battery;

when considering that the battery temperature is higher in summer or when the vehicle is just flamed off and is electrified again, the application sets the prior execution strategy of the battery aiming at the starting stage so that the vehicle battery can be timely cooled when exceeding a certain temperature, and the temperature requirement of the battery is ensured. The battery in each embodiment of this application also can be called the battery package, and the battery package can adopt ternary electric core, is established ties by the module and constitutes, is equipped with battery management system, battery thermal management system in the battery package, can effectively protect battery package safety.

Considering that users exist in the passenger cabin for a long time in the operation stage, a member cabin priority execution strategy is formulated at the moment so as to meet the cooling performance of the passenger cabin and ensure the temperature comfort of the users in the driving process.

Therefore, the cooling strategy of the embodiment of the application at least comprises a cooling strategy corresponding to the starting stage and a cooling strategy corresponding to the operating stage. It should be noted that, in the cooling strategy of each stage, not only the cooling of the battery or the passenger compartment is satisfied singly, but also the current state of the other party still needs to be considered, that is, each cooling strategy includes cooling the passenger compartment and cooling the battery. For example, in the cooling strategy in the operation phase, not only the cooling of the passenger compartment is considered but also the current state of the battery is considered to cool the battery.

The corresponding relation between the driving stage and the cooling strategy can be stored in the system as an executive program, after the system determines the current driving stage of the vehicle, the stored target cooling strategy corresponding to the current driving stage can be inquired, and then at least one of the passenger compartment and the battery can be cooled according to the target cooling strategy according to the conditions.

And S103, cooling the passenger compartment and/or the battery according to the target cooling strategy.

Specifically, when the current driving phase of the vehicle is in the starting phase, the step S103 may be performed as follows:

and preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

In the embodiment of the application, a first temperature threshold of the battery is set in the starting stage, and when the temperature of the battery exceeds the temperature threshold, the battery needs to be cooled down emergently so as to ensure the performance of the battery and maintain the service life of the battery. Different batteries have different performances and corresponding elevation temperatures, so the set first temperature threshold of the batteries may also be different. That is, the first temperature threshold of the battery may be set with reference to a battery actually used in the vehicle, and the present application is not limited thereto.

In the starting stage, in order to embody the principle of preferential cooling of the battery, in one aspect, in an embodiment of the present application, the following steps are provided:

after the vehicle is electrified and started, the system preferentially detects the temperature of the battery, determines the current temperature of the battery, judges whether the current temperature of the battery exceeds a first temperature threshold of the battery, and sends an instruction to the air conditioning system when the current temperature of the battery exceeds the first temperature threshold of the battery, so that the air conditioning system is instructed to only cool the battery, and the cooling requirement of the battery at the starting stage is preferentially met.

After the vehicle is powered on and started, if the system detects that the current temperature of the battery does not exceed (is less than or equal to) the first temperature threshold of the battery or is reduced to be less than the first temperature threshold of the battery through the air conditioning system, it is indicated that the cooling requirement of the current battery is not the most urgent, and at the moment, the system considers the cooling requirement of the passenger compartment. The system detects the temperature of the passenger cabin, judges whether the current temperature of the passenger cabin exceeds a preset first temperature threshold value of the passenger cabin, the first temperature threshold value of the passenger cabin is an elevation temperature value of the passenger cabin in a starting stage, and sends an instruction to the air conditioning system when the current temperature of the battery is lower than the first temperature threshold value of the battery and the current temperature of the passenger cabin exceeds the first temperature threshold value of the passenger cabin so as to indicate the air conditioning system to only cool the passenger cabin. However, in view of the starting stage, when only the passenger compartment is cooled, the battery temperature may rise to exceed the battery elevation temperature due to continuous discharge, so to embody the principle of preferential cooling of the battery, from another aspect, in an embodiment of the present application, the following steps are further provided:

in the process of only cooling the passenger compartment, judging whether the current temperature of the battery exceeds a preset second temperature threshold of the battery, and switching to only cool the battery when the current temperature of the battery exceeds the second temperature threshold of the battery; wherein the battery second temperature threshold is greater than the battery first temperature threshold.

In other words, in the process of only cooling the passenger compartment, the embodiment of the invention monitors the current temperature of the battery at any time, so that when the temperature of the battery is too high, the temperature is timely switched to only cooling the battery. When the passenger compartment is cooled, the battery is discharged or the temperature of the battery rises due to the influence of the external environment, and if the current temperature of the battery is only compared with the first temperature threshold of the battery, the problem that the performance of an air conditioning system is influenced due to frequent system switching can be caused. Therefore, the second temperature threshold value of the battery is further arranged, the second temperature threshold value of the battery is larger than the first temperature threshold value of the battery, in the stage, the current temperature of the battery is compared with the preset second temperature threshold value of the battery by the system, and when the current temperature of the battery exceeds the second temperature threshold value of the battery, the battery is only cooled, so that the cooling requirement of the battery in the starting stage can be preferentially met, and the problem that the battery and the passenger compartment are too frequently cooled and switched can be avoided.

Considering all the factors, it is considered that the difference between the second temperature threshold value of the battery and the first temperature threshold value of the battery may be preferably set to 2 ℃. If the first temperature threshold of the battery is 43 ℃, the second temperature threshold of the battery is 45 ℃.

Because this application is to air conditioning system's two operating modes of opening of refrigeration and is proposed, adapts to new energy automobile's development at present, consequently, in the execution of cooling, this application can adopt the water-cooling heat dissipation mode to cool down the battery. The water-cooling heat dissipation system mainly comprises: water pump, heat exchanger, fin, expansion tank etc.. The water cooling technology is a cooling technology based on liquid heat exchange, has higher efficiency than an air cooling technology, has more uniform internal temperature of the battery pack of the electric automobile, can be integrated with a cooling system of a vehicle, has high heat exchange coefficient with the wall surface of the battery, and has high cooling and heating speeds. The specific structure for cooling the battery and the passenger compartment does not belong to the key point of the invention, and the application is not limited herein.

And based on a water-cooling mode, when the battery is only determined to be cooled, the system sends a cooling request to the air conditioning system, wherein the cooling request comprises the requested temperature. Since the elevation temperatures of different batteries are different, referring to the first temperature threshold of the battery, the system can preset the optimal cooling request temperature corresponding to the first temperature threshold of the battery, for example, when the temperature of the battery exceeds 43 ℃ (the first temperature threshold of the battery), the system requests the air conditioning system for the inlet water temperature of 15 ℃.

For a target cooling strategy corresponding to the start phase, referring to fig. 2, an example is as follows:

after the vehicle is electrified, judging whether the current temperature of the battery is more than 43 ℃;

if the current temperature of the battery is higher than 43 ℃, only cooling the battery, and requesting the battery to request the air conditioning system for the inlet water temperature of 15 ℃ by the system;

if the current temperature of the battery is less than or equal to 43 ℃, the system judges whether the current temperature of the passenger compartment is more than or equal to 33 ℃;

if the current temperature of the passenger cabin is more than or equal to 33 ℃, the system only cools the passenger cabin, starts the air conditioner, simultaneously judges whether the current temperature of the battery is more than 45 ℃, and only cools the battery when the current temperature of the battery is more than 45 ℃, and the system requests the battery to the air conditioning system to request that the inlet water temperature is 15 ℃.

The above-mentioned detailed description is made on the execution manner of the target cooling strategy corresponding to the start phase, and next, the present application describes the execution manner of the target cooling strategy corresponding to the operation phase.

In an embodiment of the present application, two cases of executing a target cooling strategy corresponding to an operation stage by a vehicle are provided:

the first condition is as follows: and when the current temperature of the battery does not exceed the first temperature threshold of the battery and the current temperature of the passenger compartment does not exceed the first temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to a target cooling strategy corresponding to the operation stage.

Two possibilities are possible, one of them is that after the vehicle is powered on and started, the system detects that the current temperature of the battery does not exceed the first temperature threshold of the battery and the current temperature of the passenger compartment does not exceed the first temperature threshold of the passenger compartment, which is equivalent to that neither the battery nor the passenger compartment is cooled down in the starting stage, and the system directly enters the operating stage. After the vehicle is powered on and started, the system cools the battery so that the current temperature of the battery does not exceed the first temperature threshold of the battery, and the detected temperature of the passenger compartment does not exceed the elevation temperature of the passenger compartment (the first temperature threshold of the passenger compartment), so that the condition of entering the operation stage is met, and the system starts to execute a target cooling strategy corresponding to the operation stage.

Referring to fig. 2, for example, the first battery temperature threshold is 43 ℃, the first passenger compartment temperature threshold is 33 ℃, and when the battery temperature is less than or equal to 43 ℃ and the passenger compartment temperature is less than or equal to 33 ℃, the system executes a target cooling strategy corresponding to the operation stage to cool the passenger compartment and/or the battery.

Case two: in the process of only cooling the passenger compartment, when the current temperature of the battery does not exceed the second temperature threshold of the battery and the current temperature of the passenger compartment is reduced to be less than or equal to the preset second temperature threshold of the passenger compartment, cooling the passenger compartment and/or the battery according to a target cooling strategy corresponding to the operation stage;

wherein the passenger compartment second temperature threshold is less than the passenger compartment first temperature threshold.

Two possibilities exist for the occurrence of the situation, one possibility is that after the vehicle is powered on and started, the system detects that the current temperature of the battery does not exceed the first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the first temperature threshold of the passenger compartment, and cools the passenger compartment, so that the temperature of the passenger compartment is reduced to be less than or equal to the preset second temperature threshold of the passenger compartment. And the system cools the battery and the passenger compartment in sequence in the starting stage, and finally reduces the temperature of the passenger compartment to be less than or equal to the preset second temperature threshold of the passenger compartment under the condition that the current temperature of the battery does not exceed the second temperature threshold of the battery. At the moment, the system enters an operation stage, and the passenger compartment and/or the battery are cooled according to a target cooling strategy corresponding to the operation stage.

It should be noted that, in case two, the passenger compartment temperature is compared with the passenger compartment second temperature threshold value in the present application, but not with the passenger compartment first temperature threshold value, and on the one hand, the problem of frequent system switching can also be avoided, on the other hand, sufficient time is given to the system to judge whether the battery exceeds the preset battery second temperature threshold value, a policy that only the battery is cooled preferentially in the starting stage is embodied, the cooling requirement of the battery is ensured, and on the other hand, an obvious limit is also provided between the operation stage and the starting stage, so that the problem of confusion of the system execution policy is avoided.

Referring to fig. 2, as an example, the second passenger compartment temperature threshold is 30 ℃, and when the current temperature of the battery is less than or equal to 45 ℃ and the temperature of the passenger compartment is less than or equal to 30 ℃, the system executes a target cooling strategy corresponding to the operation stage to cool the passenger compartment and/or the battery.

When the current driving phase of the vehicle is in the running phase, the step S103 may be performed as follows:

and preferentially cooling the passenger compartment according to a target cooling strategy corresponding to the operation stage until the current temperature of the battery exceeds a preset third temperature threshold of the battery, and switching to cooling only the battery.

After the system enters the operation stage, the principle of preferential cooling of the passenger cabin is executed so as to preferentially ensure the comfort of the passenger cabin. However, in this process, for the electric vehicle, the battery is powered in a continuous discharge state, and the temperature of the battery is increased, so the system also monitors the current temperature of the battery in real time, and correspondingly cools the battery according to the temperature condition of the battery while keeping cooling the passenger compartment, and only the battery is cooled unless the current temperature of the battery exceeds a preset third temperature threshold of the battery. Under the condition that the passenger compartment is preferentially cooled, the temperature of the battery is controlled by the bottom line, and the problem that the battery is affected in performance and even exploded when the temperature of the battery is raised to a certain degree is avoided.

In an embodiment of the application, the system performs the following steps in the process of cooling the passenger compartment:

judging whether the current temperature of the battery exceeds a third temperature threshold of the battery;

when the current temperature of the battery does not exceed the third temperature threshold of the battery, inquiring a target battery request inlet water temperature corresponding to the current temperature of the battery according to the corresponding relation between the battery temperature and the battery request inlet water temperature, and cooling the battery and simultaneously keeping the current temperature of the passenger compartment not to exceed the preset third temperature threshold of the passenger compartment according to the target battery request inlet water temperature, wherein different temperature intervals of the battery correspond to different battery request inlet water temperatures.

The operation stage, when keeping the passenger cabin cooling, carry out corresponding cooling to the battery according to the temperature condition of battery, this application is according to research, provides the cooling strategy step by step to the battery, preset the corresponding relation between battery temperature and the battery request entry temperature, the different temperature intervals of battery correspond different battery request entry temperatures, so both realized the control to the battery temperature, can realize the high-efficient operation of the two operating modes of air conditioning system refrigeration again, be favorable to maintaining air conditioning system, avoid it to be in high load state for a long time. The battery requests the gradual reduction of the inlet water temperature until the passenger compartment is stopped to cool, and the conversion process from the priority of the passenger compartment cooling to the priority of the battery cooling in the vehicle operation stage is embodied.

Of course, based on the strategy of the prior cooling of the passenger compartment in the operation stage, the lower temperature limit when the battery is gradually cooled is also set in the present application, that is, the battery is cooled and the current temperature of the passenger compartment is required to be ensured not to exceed the preset third temperature threshold of the passenger compartment. In other words, the passenger compartment may only be cooled when the battery temperature does not exceed the battery third temperature threshold and the current temperature of the passenger compartment exceeds the passenger compartment third temperature threshold.

In the foregoing, in the embodiment of the present application, the second temperature threshold of the battery, the third temperature threshold of the battery, the first temperature threshold of the passenger compartment, the second temperature threshold of the passenger compartment, and the third temperature threshold of the passenger compartment are not limited, and it is only required to ensure the rationality of implementing the cooling strategy.

In the embodiment of the present application, the correspondence relationship between the battery temperature and the battery requested inlet water temperature includes:

when the preset fourth temperature threshold of the battery is less than or equal to the battery temperature and less than the preset fifth temperature threshold of the battery, the battery requests that the inlet water temperature is a first temperature;

when the fifth temperature threshold value of the battery is not more than the battery temperature and is less than the preset sixth temperature threshold value of the battery, the temperature of the inlet water requested by the battery is a second temperature;

when the sixth temperature threshold of the battery is not more than the battery temperature and less than the third temperature threshold of the battery, the temperature of the inlet water requested by the battery is three;

wherein the temperature three is less than the temperature two is less than the temperature one.

In the above, the fourth temperature threshold of the battery may be set to 35 ℃, and when the temperature of the battery is lower than the fourth temperature threshold of the battery, the air conditioning system may only cool the passenger compartment in the operation stage, and may not need to cool the battery. Optionally, the fifth temperature threshold of the battery may be the same as the second temperature threshold of the battery, such as 45 ℃, which embodies a cooling strategy for the startup phase and the operation phase according to time-based conditions. The temperature value of the water temperature at the inlet requested by the battery is not specifically required, and the specific value can be determined according to the performances of the battery and the battery pack.

For a target cooling strategy corresponding to an operation phase, referring to fig. 2, an example is as follows:

while keeping cooling the passenger compartment, determining the current temperature of the battery, and cooling the battery according to a gradual cooling strategy of the battery, wherein the temperature of the passenger compartment is ensured not to exceed 28 ℃:

when the temperature of the battery is more than or equal to 35 ℃ and less than 45 ℃, the temperature of the water at the inlet of the battery is required to be 20 ℃;

when the temperature of the battery is more than or equal to 45 ℃ and less than 50 ℃, the temperature of the water at the inlet of the battery is required to be 15 ℃;

when the temperature of the battery is more than or equal to 50 ℃ and less than 55 ℃, the temperature of the water at the inlet of the battery is required to be 10 ℃;

when the temperature of the battery is more than or equal to 55 ℃, the air conditioner of the passenger compartment is disconnected, and only the temperature of the battery is kept to be reduced.

Based on the same inventive concept, referring to fig. 3, an embodiment of the present invention provides a schematic structural diagram of a vehicle, which includes a passenger compartment 301, a battery 302, an air conditioning system 303, and a memory 305 for storing executable instructions of a controller 304;

and the controller 304 is used for executing the passenger compartment and battery cooling method according to the embodiment of the application to control the air conditioning system 303 to cool the passenger compartment 301 and/or the battery 302.

The vehicle provided by the embodiment of the application can adaptively change the priority strategies for cooling the passenger compartment and the battery according to different driving stages and different conditions in the driving stages, and can embody the thought principle of 'according to the conditions and conditions', so that the cooling of the battery can be met under the limited capacity of an air conditioning system, and the dynamic property and the service life of the whole vehicle are not influenced; the cooling comfort of the passenger compartment can be met, and customer complaints are not caused; meanwhile, the energy consumption of the whole vehicle can be saved to the maximum extent, more energy of the whole vehicle is used for vehicle endurance, and the flexibility is high.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Based on the same inventive concept, referring to fig. 4, an embodiment of the present invention further provides a functional module schematic diagram of a passenger compartment and a battery cooling device, where the device may include the following modules:

a driving phase determination module 401, configured to determine a current driving phase of the vehicle;

a target cooling strategy query module 402, configured to query a target cooling strategy corresponding to a current driving stage of the vehicle according to a corresponding relationship between the driving stages and the cooling strategies, where different driving stages correspond to different cooling strategies, and each cooling strategy includes cooling a passenger compartment and cooling a battery;

and a target cooling strategy executing module 403, configured to cool the passenger compartment and/or the battery according to the target cooling strategy.

In one embodiment of the present application, the driving phase comprises a start-up phase,

the driving phase determination module 401 includes:

the starting stage determining submodule is used for determining that the vehicle is currently in the starting stage when the triggering operation of power-on starting of the vehicle is received;

the target cooling policy enforcement module 403 may include the following sub-modules:

and the first execution submodule in the starting stage is used for preferentially only cooling the battery according to the target cooling strategy corresponding to the starting stage until the current temperature of the battery is lower than a preset first temperature threshold of the battery and the current temperature of the passenger compartment exceeds the preset first temperature threshold of the passenger compartment, and switching to only cool the passenger compartment.

In an embodiment of the present application, the target cooling policy executing module 403 may include the following sub-modules:

the battery temperature first determination submodule is used for determining the current temperature of the battery;

the battery cooling execution submodule is used for cooling the battery only when the current temperature of the battery exceeds the first temperature threshold of the battery;

in the process of cooling only the passenger compartment, the target cooling strategy execution module 403 may further include the following sub-modules:

the second execution submodule in the starting stage is used for judging whether the current temperature of the battery exceeds a preset second temperature threshold of the battery or not, and when the current temperature of the battery exceeds the second temperature threshold of the battery, the current temperature of the battery is switched to be only reduced;

wherein the battery second temperature threshold is greater than the battery first temperature threshold.

In an embodiment of the present application, the driving phase further includes an operation phase, and the target cooling strategy executing module 403 may include the following sub-modules:

the cooling strategy first switching submodule is used for cooling the passenger compartment and/or the battery according to a target cooling strategy corresponding to the operation stage when the current temperature of the battery does not exceed the battery first temperature threshold and the current temperature of the passenger compartment does not exceed the passenger compartment first temperature threshold;

or, the cooling strategy second switching submodule is used for cooling the passenger compartment and/or the battery according to the target cooling strategy corresponding to the operation stage when the current temperature of the battery does not exceed the battery second temperature threshold and the current temperature of the passenger compartment is reduced to be less than or equal to the preset passenger compartment second temperature threshold in the process of only cooling the passenger compartment;

wherein the passenger compartment second temperature threshold is less than the passenger compartment first temperature threshold.

In one embodiment of the present application, the driving phases include an operating phase,

the target cooling policy enforcement module 403 may include the following sub-modules:

and the first execution submodule in the operation stage is used for preferentially cooling the passenger compartment according to a target cooling strategy corresponding to the operation stage until the current temperature of the battery exceeds a preset third temperature threshold of the battery, and switching to only cool the battery.

In an embodiment of the present application, in the process of cooling the passenger compartment, the target cooling strategy executing module 403 may further include the following sub-modules:

the battery temperature second determining submodule is used for judging whether the current temperature of the battery exceeds a third temperature threshold value of the battery;

and the second execution submodule in the operation stage is used for inquiring a target battery request inlet water temperature corresponding to the current temperature of the battery according to the corresponding relation between the battery temperature and the battery request inlet water temperature when the current temperature of the battery does not exceed the third temperature threshold of the battery, and cooling the battery and simultaneously keeping the current temperature of the passenger compartment not to exceed the preset third temperature threshold of the passenger compartment according to the target battery request inlet water temperature, wherein different temperature intervals of the battery correspond to different battery request inlet water temperatures.

In an embodiment of the present application, the correspondence between the battery temperature and the battery requested inlet water temperature includes:

when the preset fourth temperature threshold of the battery is less than or equal to the battery temperature and less than the preset fifth temperature threshold of the battery, the battery requests that the inlet water temperature is a first temperature;

when the fifth temperature threshold value of the battery is not more than the battery temperature and is less than the preset sixth temperature threshold value of the battery, the temperature of the inlet water requested by the battery is a second temperature;

when the sixth temperature threshold of the battery is not more than the battery temperature and less than the third temperature threshold of the battery, the temperature of the inlet water requested by the battery is three;

wherein the temperature three is less than the temperature two is less than the temperature one.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.

The technical solutions provided by the present application are described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understanding the present application, and the content of the present description should not be construed as limiting the present application. While various modifications of the illustrative embodiments and applications will be apparent to those skilled in the art based upon this disclosure, it is not necessary or necessary to exhaustively enumerate all embodiments, and all obvious variations and modifications can be resorted to, falling within the scope of the disclosure.