阅读说明：本技术 电动车辆的冷暖系统、电动车辆及控制方法 (Cooling and heating system of electric vehicle, electric vehicle and control method ) 是由 陈士刚 舒晖 李庆国 张�杰 姚学松 刘琳 沙文瀚 于 2021-01-27 设计创作，主要内容包括：本申请公开了一种电动车辆的冷暖系统、电动车辆及控制方法,其中,系统包括：冷却组件,用于为车辆的高压部件进行冷却；加热组件,用于为车辆进行制热；制暖组件,用于利用车辆的高压部件产生的热量为车辆进行制热；控制器,用于在检测到车内环境温度高于或等于制冷阈值时,控制冷却组件冷却,并且在检测到车内环境温度低于或等于制热阈值时,控制加热组件和/或制暖组件制热。由此,解决了目前仅通过PTC加热制暖导致电动车辆能耗大等问题。(The application discloses cooling and heating system, electric vehicle and control method of electric vehicle, wherein, the system includes: a cooling assembly for cooling a high-pressure component of a vehicle; the heating assembly is used for heating the vehicle; the heating assembly is used for heating the vehicle by utilizing heat generated by high-voltage components of the vehicle; and the controller is used for controlling the cooling assembly to cool when the ambient temperature in the vehicle is detected to be higher than or equal to the cooling threshold value, and controlling the heating assembly and/or the heating assembly to heat when the ambient temperature in the vehicle is detected to be lower than or equal to the heating threshold value. Therefore, the problem that the energy consumption of the electric vehicle is large due to the fact that only PTC heating is used for heating at present is solved.)

1. A cooling and heating system for an electric vehicle, comprising:

a cooling assembly for cooling a high-pressure component of the vehicle;

a heating assembly for heating the vehicle;

a heating assembly for heating the vehicle using heat generated by a high-voltage component of the vehicle; and

the controller is used for controlling the cooling assembly to cool when the ambient temperature in the vehicle is detected to be higher than or equal to a cooling threshold value, and controlling the heating assembly and/or the heating assembly to heat when the ambient temperature in the vehicle is detected to be lower than or equal to a heating threshold value.

2. The system of claim 1, further comprising:

the first direct-current valve is used for opening and closing the first heat dissipation loop;

the second straight-through valve is used for opening and closing the second heat dissipation loop;

and the water pump is used for driving cooling water in the first heat dissipation loop and the second heat dissipation loop.

3. The system of claim 2, wherein the heating component comprises a Heating Ventilation and Air Conditioning (HVAC), and wherein the controller is further configured to, when the ambient temperature in the vehicle is less than or equal to a heating threshold:

when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop and controls the heating component to heat at the same time;

when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and meanwhile controls the heating component to heat.

4. The system of claim 2, wherein the refrigeration assembly comprises a fan, and wherein the controller controls the second on-way valve to close when the ambient temperature in the vehicle is greater than or equal to a refrigeration threshold, the controller further configured to:

controlling the first direct-current valve to be closed when the actual temperature of the high-voltage component is less than or equal to a first threshold value;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool high-pressure components of the vehicle through the first heat dissipation loop;

and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool a high-pressure component of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

5. The system of claim 2, wherein upon detecting that the in-vehicle ambient temperature is greater than a heating threshold and less than a cooling threshold, the controller is further configured to:

when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop;

when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle through the first heat dissipation loop and the second heat dissipation loop by utilizing heat generated by the high-pressure component, and simultaneously, the fan is controlled to cool the high-pressure component of the vehicle.

6. An electric vehicle characterized by comprising the cooling and heating system of the electric vehicle as claimed in any one of claims 1 to 5.

7. A control method of a cooling and heating system of an electric vehicle according to any one of claims 1 to 5, characterized by comprising the steps of:

detecting the environment temperature in the vehicle;

when the ambient temperature in the vehicle is higher than or equal to a refrigeration threshold value, controlling the cooling assembly to cool; and

and when the ambient temperature in the vehicle is lower than or equal to a heating threshold value, controlling the heating assembly and/or the heating assembly to heat.

8. The method of claim 7, wherein controlling the heating assembly and/or the heating assembly to heat when the ambient temperature in the vehicle is less than or equal to a heating threshold comprises:

when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop and controls the heating component to heat at the same time;

when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and meanwhile controls the heating component to heat.

9. The method of claim 7, wherein controlling the cooling assembly to cool when the ambient temperature within the vehicle is greater than or equal to a cooling threshold comprises:

controlling the first direct-current valve to be closed when the actual temperature of the high-voltage component is less than or equal to a first threshold value;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool high-pressure components of the vehicle through the first heat dissipation loop;

and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool a high-pressure component of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

10. The method of claim 7, wherein when the ambient temperature within the vehicle is greater than a heating threshold and less than a cooling threshold, further comprising:

when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle;

when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop;

when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle through the first heat dissipation loop and the second heat dissipation loop by utilizing heat generated by the high-pressure component, and simultaneously, the fan is controlled to cool the high-pressure component of the vehicle.

Technical Field

The application relates to the technical field of new energy automobiles, in particular to a cooling and heating system of an electric vehicle, the electric vehicle and a control method.

Background

With the popularization of electric vehicles, the national requirements on the power consumption, the energy consumption and the like of the electric vehicles are higher and higher.

Compared with the traditional fuel oil automobile, the electric automobile mainly replaces an engine with a driving motor, and fuel is supplied by a battery pack instead of gasoline, diesel oil and the like. The refrigeration mode of the current electric automobile is the same as that of the traditional fuel automobile, and the refrigeration is carried out by a compressor system; however, the electric vehicle is different from the fuel vehicle in heating manner, and the electric vehicle is not heated by the engine heating power like the fuel vehicle, but heated by a separate PTC (Positive Temperature Coefficient thermistor), and the PTC is heated by the battery system to provide electric energy.

However, the energy consumption of the electric vehicle is increased only by the way of heating with the PTC in the related art, and a solution is needed.

Content of application

The application provides a cooling and heating system of an electric vehicle, the electric vehicle and a control method, and solves the problems that the electric vehicle is large in energy consumption and the like caused by heating only through PTC heating at present.

An embodiment of a first aspect of the present application provides a cooling and heating system for an electric vehicle, including: a cooling assembly for cooling a high-pressure component of the vehicle; a heating assembly for heating the vehicle; a heating assembly for heating the vehicle using heat generated by a high-voltage component of the vehicle; the controller is used for controlling the cooling assembly to cool when the ambient temperature in the vehicle is detected to be higher than or equal to a cooling threshold value, and controlling the heating assembly and/or the heating assembly to heat when the ambient temperature in the vehicle is detected to be lower than or equal to a heating threshold value.

Further, still include: the first direct-current valve is used for opening and closing the first heat dissipation loop; the second straight-through valve is used for opening and closing the second heat dissipation loop; and the water pump is used for driving cooling water in the first heat dissipation loop and the second heat dissipation loop.

Further, the heating assembly includes a heating ventilation and air conditioning HVAC, and the controller is further configured to: when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop and controls the heating component to heat at the same time; when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and meanwhile controls the heating component to heat.

Further, the refrigeration assembly includes a fan, and the controller controls the second pass valve to close when the ambient temperature in the vehicle is greater than or equal to a refrigeration threshold, the controller further configured to: controlling the first direct-current valve to be closed when the actual temperature of the high-voltage component is less than or equal to a first threshold value; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool high-pressure components of the vehicle through the first heat dissipation loop; and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool a high-pressure component of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

Further, when it is detected that the ambient temperature in the vehicle is greater than a heating threshold and less than a cooling threshold, the controller is further configured to:

when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop; when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle through the first heat dissipation loop and the second heat dissipation loop by utilizing heat generated by the high-pressure component, and simultaneously, the fan is controlled to cool the high-pressure component of the vehicle.

In a second aspect, an embodiment of the present application provides an electric vehicle, including the cooling and heating system of the electric vehicle of the above embodiment.

An embodiment of a third aspect of the present application provides a control method of a cooling and heating system of an electric vehicle as described in the above embodiment, including the steps of: detecting the environment temperature in the vehicle; when the ambient temperature in the vehicle is higher than or equal to a refrigeration threshold value, controlling the cooling assembly to cool; and when the ambient temperature in the vehicle is lower than or equal to a heating threshold value, controlling the heating assembly and/or the heating assembly to heat.

Further, when the ambient temperature in the vehicle is lower than or equal to a heating threshold, controlling the heating component and/or the heating component to heat includes: when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop and controls the heating component to heat at the same time; when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and meanwhile controls the heating component to heat.

Further, when the ambient temperature in the vehicle is higher than or equal to a refrigeration threshold, controlling the cooling assembly to cool comprises: controlling the first direct-current valve to be closed when the actual temperature of the high-voltage component is less than or equal to a first threshold value; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool high-pressure components of the vehicle through the first heat dissipation loop; and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool a high-pressure component of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

Further, when the ambient temperature in the vehicle is greater than the heating threshold and less than the cooling threshold, the method further includes: when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first straight-through valve and the second straight-through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop; when the actual temperature is larger than or equal to a second threshold value, the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC are controlled to be started, so that the HVAC heats the vehicle through the first heat dissipation loop and the second heat dissipation loop by utilizing heat generated by the high-pressure component, and simultaneously, the fan is controlled to cool the high-pressure component of the vehicle.

When the environment temperature in the vehicle is higher than or equal to the refrigerating threshold value, the refrigerating assembly is controlled to cool the high-voltage component, and when the environment temperature in the vehicle is lower than or equal to the heating threshold value, the heating assembly and/or the heating assembly is controlled to heat, so that the electric vehicle can be cooled and heated according to the requirement, the heat generated by the high-voltage component can be utilized to heat, the heating energy consumption is effectively reduced, and the energy utilization rate is improved. Therefore, the problem that the energy consumption of the electric vehicle is large due to the fact that only PTC heating is used for heating at present is solved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a block schematic diagram of a cooling and heating system of an electric vehicle according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a cooling and heating system of an electric vehicle according to an embodiment of the present application;

fig. 3 is a heating flow chart of a cooling and heating system of an electric vehicle according to an embodiment of the present application;

fig. 4 is a cooling flow chart of a cooling and heating system of an electric vehicle according to an embodiment of the present application;

fig. 5 is a heating and cooling synchronous working flow chart of a cooling and heating system of an electric vehicle according to an embodiment of the present application;

fig. 6 is a flowchart of a control method of a cooling and heating system of an electric vehicle according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

A cooling and heating system of an electric vehicle, and a control method of the electric vehicle according to the embodiments of the present application are described below with reference to the drawings. In the cooling and heating system, when the ambient temperature in the vehicle is higher than or equal to a cooling threshold, the cooling assembly is controlled to cool the high-voltage component, and when the ambient temperature in the vehicle is lower than or equal to a heating threshold, the heating assembly and/or the heating assembly is controlled to heat, so that the electric vehicle can be cooled and heated according to requirements, heat generated by the high-voltage component can be utilized to heat, the heating energy consumption is effectively reduced, and the energy utilization rate is improved. Therefore, the problem that the energy consumption of the electric vehicle is large due to the fact that only PTC heating is used for heating at present is solved.

Specifically, fig. 1 is a block schematic diagram of a cooling and heating system of an electric vehicle according to an embodiment of the present disclosure.

As shown in fig. 1, the cooling and heating system 10 of the electric vehicle includes: a cooling module 100, a heating module 200, a warming module 300, and a controller 400.

Wherein the cooling assembly 100 is used for cooling high-pressure components of a vehicle; the heating assembly 200 is used for heating a vehicle; the heating module 300 is used for heating the vehicle by using heat generated by high-voltage components of the vehicle; the controller 400 is configured to control the cooling assembly 100 to cool when the ambient temperature in the vehicle is detected to be higher than or equal to the cooling threshold, and control the heating assembly 200 and/or the heating assembly 300 to heat when the ambient temperature in the vehicle is detected to be lower than or equal to the heating threshold.

It can be understood that, in the embodiment of the present application, the cooling component may be turned on when the ambient temperature is higher than a certain threshold, and the heating component may be turned on when the ambient temperature is lower than a certain threshold, so that the heat generated by the high-voltage component of the vehicle may be utilized to heat the vehicle, and the power consumption value of the electric vehicle may be reduced. The refrigeration threshold is greater than the heating threshold, and the refrigeration threshold and the heating threshold can be set according to actual conditions, which is not specifically limited herein.

Wherein, the cooling assembly 100 may include an MOT (Motor), an MCU (Motor Control Unit), a DCDC (Direct Current/Direct Current converter), a water pump, a water temperature sensor, an expansion tank, a return air pipeline, a radiator, a fan, a straight-through valve, etc. as shown in fig. 2; the Heating module 300 may include a MOT, an MCU, a DCDC, a water pump, a water temperature sensor, an HVAC (Heating Ventilation and Air Conditioning), a straight valve, etc., as shown in fig. 2; the heating element 200 may be a PTC; the controller 400 may be a VCU (Vehicle control unit). When the whole vehicle is controlled, the temperature sensors of the high-voltage components such as the environment temperature sensor and the motor report the acquired temperature to the whole vehicle controller, and the whole vehicle controller respectively controls the PTC, the water pump and the fan according to the requirements so as to achieve the cooling and heating effects.

It should be noted that, as shown in fig. 2, the first through valve, the second through valve and the water pump may be a device shared by the cooling module 100 and the heating module 300, so as to control the corresponding cooling water circuit to be turned on or off by opening and closing the first through valve and the second through valve.

In some embodiments, when the ambient temperature in the vehicle is lower than or equal to the heating threshold, the controller 400 is further configured to: when the actual temperature of the high-pressure component is smaller than or equal to a first threshold value, controlling the first through valve and the second through valve to be closed, and controlling the heating assembly 200 to heat the vehicle; when the actual temperature is greater than the first threshold and less than the second threshold, controlling the first through valve to be closed, and controlling the second through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by using heat generated by the high-voltage component through the second heat dissipation loop and controls the heating assembly 200 to heat at the same time; and when the actual temperature is greater than or equal to the second threshold value, controlling the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC to be started, so that the HVAC heats the vehicle by using the heat generated by the high-voltage component through the first heat dissipation loop and the second heat dissipation loop, and simultaneously controls the heating assembly 200 to heat.

The first threshold, the second threshold, and the third threshold may be calibrated according to the high-voltage component, and are not particularly limited.

It can be understood that when the ambient temperature T in the vehicle is_{Ring (C)}Heating threshold not more thanValue T_{Ring-threshold 1}In time, the vehicle controller VCU shows that the temperature in the vehicle is very low at the moment and needs large temperature rise, and the vehicle controller VCU is used for controlling the maximum temperature T of each high-voltage component_maxThe value determines whether the first straight-through valve, the second straight-through valve, the PTC, the water pump, the fan and the HVAC are started to supply heat to the interior of the vehicle. As shown in fig. 3, the control principle of the heating assembly and the heating assembly is as follows:

(1)T_maxis less than or equal to the first threshold value T_{Cold-threshold 1}When the high-voltage components do not need to be cooled, the first straight-through valve is closed, the second straight-through valve is closed, the water pump is closed, the fan is closed, the HVAC is closed, and the PTC is opened to heat the interior of the vehicle;

(2) first threshold value T_{Cold-threshold 1}＜T_max< second threshold value T_{Cold threshold 2}When the vehicle is in a normal state, the first direct-flow valve is closed, the second direct-flow valve is opened, the water pump is opened, the PTC is opened, the HVAC is opened, and the fan is closed, so that the PTC is heated in the vehicle, and the cooling water of the high-pressure loop supplies heat to the interior of the vehicle through HVAC heat dissipation;

(3)T_max≥T_{cold threshold 2}When the vehicle is started, the first direct-through valve is opened, the second direct-through valve is opened, the water pump is opened, the HVAC is opened, the PTC is opened, the fan is closed, and at the moment, the high-pressure loop cooling water and the PTC are used for heating the interior of the vehicle at the same time.

In some embodiments, when the ambient temperature in the vehicle is greater than or equal to the refrigeration threshold, the controller 400 controls the second straight-through valve to close, the controller 400 further configured to: when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first direct-current valve to be closed; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool a high-pressure component of the vehicle through the first heat dissipation loop; and when the actual temperature is greater than or equal to the second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool the high-pressure components of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

It can be understood that the ambient temperature T in the vehicle_{Ring (C)}Not less than refrigeration threshold T_{Ring-threshold 2}The method comprises the following steps: at the moment, the second straight-through valve is closed, and at the moment, the VCU of the vehicle control unit is at the moment according to the maximum temperature T of each high-pressure component_maxDetermination of value sizeAnd whether the first direct-current valve, the water pump and the fan are started or not. As shown in fig. 4, the control principle of the refrigeration assembly is as follows:

(1)T_max≤T_{cold-threshold 1}When the fan is started, the first direct-current valve is closed, the water pump is not started, and the fan is not started;

(2)T_{cold-threshold 1}＜T_max＜T_{Cold threshold 2}When the radiator is used, the first direct-current valve is started, the water pump is started, the fan is not started, and at the moment, the water pump is mainly used for driving water flow to naturally radiate heat through the radiator;

(3)T_max≥T_{cold threshold 2}When the fan is started, the first direct-current valve is started, the water pump is started, and the fan is started, so that on one hand, the water pump drives water flow to dissipate heat, and on the other hand, the fan accelerates heat dissipation;

in some embodiments, upon detecting that the ambient temperature in the vehicle is greater than the heating threshold and less than the cooling threshold, the controller 400 is further configured to: when the actual temperature of the high-pressure component is smaller than or equal to a first threshold value, controlling the first through valve and the second through valve to be closed, and controlling the heating assembly 200 to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop; and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC to be started, so that the HVAC heats the vehicle by using heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and simultaneously controlling the fan to cool the high-pressure component of the vehicle.

It will be appreciated that when the heating threshold T is set_{Ring-threshold 1}< ambient temperature T in vehicle_{Ring (C)}< refrigeration threshold T_{Ring-threshold 2}Meanwhile, the temperature in the vehicle is not so low that heating is needed, and the temperature of each high-voltage component reaches the cooling requirement, so that the cooling assembly 100 is needed to dissipate heat. As shown in fig. 5, the control principle of the synchronous operation of heating and cooling of the electric vehicle is as follows:

(1)T_max≤T_{cold-threshold 1}When the first direct-flow valve is closed, the second direct-flow valve is openedThe valve is closed, the water pump is closed, the fan is closed, and the PTC is started at the moment to supply heat to the interior of the vehicle;

(2)T_{cold-threshold 1}＜T_max＜T_{Cold threshold 2}At this time, the maximum temperature T of the high-voltage component_maxExceeding the cooling threshold T_{Cold-threshold 1}The first direct-flow valve is closed, the second direct-flow valve is opened, the water pump is opened, the PTC is closed, the HVCA is opened, the fan is closed, and the cooling water of the high-pressure loop supplies heat to the interior of the vehicle through HVAC heat dissipation;

(3)T_max≥T_{cold threshold 2}When the high-voltage component is cooled, the first direct-flow valve is opened, the second direct-flow valve is opened, the water pump is opened, the HVAC is opened, the PTC is closed, the interior of the vehicle is heated by cooling water of the high-voltage loop, and meanwhile, the cooling fan is opened to cool the high-voltage component.

In summary, in the cooling and heating system commonly used in the electric vehicle in the prior art, the cooling is performed by a single fan, a radiator and the like, and the heating is performed by the PTC, so that the power consumption value of the electric vehicle is increased. The embodiment of the application adds the heat generated by the heating components of the electric vehicle to heat the whole vehicle on the basis of the cooling and heating system and the control mode in the prior art, and adopts the PTC and the heat productivity of the high-voltage components to heat the whole vehicle together according to the real-time temperature and the temperature rise requirement of the high-voltage components, thereby effectively utilizing the heat productivity of the high-voltage components and reducing the power consumption value of the electric vehicle.

According to the cooling and heating system of the electric vehicle, when the environment temperature in the vehicle is higher than or equal to the cooling threshold value, the cooling assembly is controlled to cool the high-voltage component, and when the environment temperature in the vehicle is lower than or equal to the heating threshold value, the heating assembly and/or the heating assembly is controlled to heat, so that the electric vehicle can be cooled and heated according to requirements, the heat generated by the high-voltage component can be utilized to heat, the heating energy consumption is effectively reduced, and the energy utilization rate is improved.

In addition, the embodiment of the application also provides an electric vehicle, and the cooling and heating system of the electric vehicle comprises the cooling and heating system of the electric vehicle. According to the electric vehicle that this application embodiment provided, when the ambient temperature is higher than or equal to the refrigeration threshold in the car, control refrigeration subassembly cools off high-pressure part, when the ambient temperature is less than or equal to the threshold that heats in the car, control heating assembly and/or the subassembly that heats to can cool off and heat electric vehicle according to the demand, and can utilize the heat that high-pressure part produced to heat, effectively reduce the energy consumption that heats, improve the utilization ratio of energy.

Next, a control method of a cooling and heating system of an electric vehicle according to an embodiment of the present application will be described with reference to the drawings.

Fig. 6 is a flowchart of a method for controlling a cooling/heating system of an electric vehicle according to an embodiment of the present application.

As shown in fig. 6, the method for controlling the cooling and heating system of the electric vehicle according to the above embodiment includes the steps of:

in step S101, an in-vehicle ambient temperature is detected;

in step S102, when the ambient temperature in the vehicle is higher than or equal to a refrigeration threshold, controlling the cooling assembly to cool;

in step S103, when the ambient temperature in the vehicle is lower than or equal to the heating threshold, the heating component and/or the heating component is controlled to heat.

Further, when the ambient temperature in the vehicle is lower than or equal to the heating threshold, the heating assembly and/or the heating assembly is controlled to heat, and the method comprises the following steps: when the actual temperature of the high-pressure component is smaller than or equal to a first threshold value, controlling the first through valve and the second through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first through valve to be closed, and controlling the second through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by using heat generated by the high-pressure component through the second heat dissipation loop and controls the heating assembly to heat at the same time; and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC to be started, so that the HVAC heats the vehicle by utilizing heat generated by the high-voltage component through the first heat dissipation loop and the second heat dissipation loop, and simultaneously controls the heating assembly to heat.

Further, when the ambient temperature in the vehicle is higher than or equal to the refrigeration threshold, the cooling assembly is controlled to cool, and the method comprises the following steps: when the actual temperature of the high-voltage component is smaller than or equal to a first threshold value, controlling the first direct-current valve to be closed; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first direct-current valve and the water pump to be started so as to cool a high-pressure component of the vehicle through the first heat dissipation loop; and when the actual temperature is greater than or equal to the second threshold value, controlling the first direct-current valve, the water pump and the fan so as to cool the high-pressure components of the vehicle through the first heat dissipation loop and control the fan to cool at the same time.

Further, when the ambient temperature in the vehicle is greater than the heating threshold and less than the cooling threshold, the method further includes: when the actual temperature of the high-pressure component is smaller than or equal to a first threshold value, controlling the first through valve and the second through valve to be closed, and controlling the heating assembly to heat the vehicle; when the actual temperature is higher than a first threshold and lower than a second threshold, controlling the first straight-through valve to be closed, and controlling the second straight-through valve, the water pump and the HVAC to be opened, so that the HVAC heats the vehicle by utilizing heat generated by the high-pressure component through the second heat dissipation loop; and when the actual temperature is greater than or equal to a second threshold value, controlling the first direct-flow valve, the second direct-flow valve, the water pump and the HVAC to be started, so that the HVAC heats the vehicle by using heat generated by the high-pressure component through the first heat dissipation loop and the second heat dissipation loop, and simultaneously controlling the fan to cool the high-pressure component of the vehicle.

It should be noted that the above explanation of the cooling and heating system embodiment of the electric vehicle is also applicable to the cooling and heating system control method of the electric vehicle of the embodiment, and is not repeated here.

According to the control method of the cooling and heating system of the electric vehicle, when the ambient temperature in the vehicle is higher than or equal to the cooling threshold value, the cooling assembly is controlled to cool the high-voltage component, and when the ambient temperature in the vehicle is lower than or equal to the heating threshold value, the heating assembly and/or the heating assembly is controlled to heat, so that the electric vehicle can be cooled and heated according to requirements, the heat generated by the high-voltage component can be utilized to heat, the heating energy consumption is effectively reduced, and the energy utilization rate is improved.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.