阅读说明：本技术 电池组件热量调控系统及新能源交通工具 (Battery pack heat regulation and control system and new energy vehicle ) 是由 刘科 曹道帆 于 2021-05-20 设计创作，主要内容包括：本发明适用于新能源领域,提供了电池组件热量调控系统及新能源交通工具,该系统包括燃料储存装置、与燃料储存装置连接的供热装置,以及电池组件；供热装置包括供热部、导热管和导热介质存储部,供热部用于将从燃料储存装置处流入的燃料催化燃烧,产生热量；导热管用于接收从导热介质存储部处流入的导热介质,并利用供热部产生的热量对导热介质进行加热,获得加热后的导热介质；当电池组件的温度低于第一预设阈值时,加热后的导热介质流经电池组件,以提高电池组件的温度。本发明的系统通过燃料催化燃烧产热,并能灵活地根据电池组件的温度向其提供所需热量,保证了电池组件在低温或者高温环境下可正常工作,且明显降低了电池组件的容量衰减。(The invention is suitable for the field of new energy, and provides a battery pack heat regulation and control system and a new energy vehicle, wherein the system comprises a fuel storage device, a heat supply device connected with the fuel storage device, and a battery pack; the heat supply device comprises a heat supply part, a heat conduction pipe and a heat conduction medium storage part, wherein the heat supply part is used for catalytically burning fuel flowing from the fuel storage device to generate heat; the heat conduction pipe is used for receiving the heat conduction medium flowing from the heat conduction medium storage part and heating the heat conduction medium by utilizing the heat generated by the heat supply part to obtain the heated heat conduction medium; when the temperature of the battery assembly is lower than a first preset threshold value, the heated heat-conducting medium flows through the battery assembly so as to improve the temperature of the battery assembly. The system generates heat through fuel catalytic combustion, can flexibly provide required heat for the battery assembly according to the temperature of the battery assembly, ensures that the battery assembly can normally work in a low-temperature or high-temperature environment, and obviously reduces the capacity attenuation of the battery assembly.)

1. A battery pack thermal regulation system, comprising:

the fuel cell comprises a fuel storage device, a heat supply device connected with the fuel storage device, and a cell assembly;

the heat supply device comprises a heat supply part, a heat conduction pipe and a heat conduction medium storage part, wherein the heat supply part is used for catalytically burning the fuel flowing from the fuel storage device to generate heat; the heat conduction pipe is used for receiving the heat conduction medium flowing from the heat conduction medium storage part and heating the heat conduction medium by using the heat generated by the heat supply part to obtain the heated heat conduction medium;

and when the temperature of the battery assembly is lower than a first preset threshold value, the heated heat-conducting medium flows through the battery assembly so as to improve the temperature of the battery assembly.

2. The battery pack thermal management system of claim 1, wherein the battery pack is provided with a first thermometer;

the battery pack heat regulation and control system comprises a first temperature control unit, wherein the first temperature control unit acquires the temperature of the battery pack through a first thermometer and sets a first flow passing through the battery pack according to a first temperature control rule and the temperature of the battery pack.

3. The battery pack heat management system according to claim 1, wherein the heat supply section is provided with a second thermometer for measuring a heat supply temperature of the heat supply member;

the battery pack heat regulating system comprises a second temperature control unit, and the second temperature control unit sets a second flow of the fuel flowing into the heat supply part according to a second temperature control rule and the heat supply temperature;

the heat supply temperature of the heat supply part is lower than or equal to 600 ℃.

4. The battery pack thermal management system of claim 1,

the heat conduction pipe is connected with a heat conduction medium storage part through a first pipeline, and the heat conduction medium in the heat conduction medium storage part flows into the heat conduction pipe through the first pipeline;

the battery assembly is provided with a first heat exchange structure, the first heat exchange structure is connected with the heat conduction pipe through a second pipeline, and the heated heat conduction medium flowing out of the heat conduction pipe flows into the first heat exchange structure through the second pipeline; the first heat exchange structure is arranged at the bottom or the periphery of the battery component, and the battery component is heated through the heated heat-conducting medium;

a third pipeline is arranged between the heat-conducting medium storage part and the first heat exchange structure, and the heat-conducting medium flowing out of the first heat exchange structure flows back to the heat-conducting medium storage part through the third pipeline.

5. The battery pack thermal management system of claim 4, wherein the second manifold is provided with a first branch line, one end of the first branch line is connected to the second manifold, and the other end of the first branch line is connected to the heat transfer medium storage part;

the first branch line is provided with a flow regulating valve, and the opening degree of the flow regulating valve changes along with the change of the flow of the third pipeline.

6. The battery pack thermal regulation system of claim 5, wherein a heater unit is further disposed between the heat supply unit and the heat transfer medium storage unit;

the second pipeline is provided with a second branch line, one end of the second branch line is connected with the second pipeline, and the other end of the second branch line is connected with the warm air device;

the warm air device is connected with the heat-conducting medium storage part through a fourth pipeline;

the warm air device is connected with the battery assembly through a fifth pipeline;

the temperature of the heat transfer medium flowing through the warm air device and flowing into the first heat exchange structure through the fifth pipeline is lower than or equal to 70 ℃.

7. The battery pack thermal management system of claim 1, wherein the battery pack is provided with a second heat exchange structure;

the fluid inlet of the second heat exchange structure is connected with the fuel outlet of the fuel storage device through a sixth pipeline;

the fluid outlet of the second heat exchange structure is connected with the fuel inlet of the fuel storage device through a seventh pipeline;

and when the temperature of the battery assembly is higher than a second preset threshold value, the temperature of the battery assembly is reduced through the second heat exchange structure.

8. The system for regulating heat of a battery assembly of claim 1, wherein the fuel in the fuel storage device is methanol or an aqueous methanol solution;

the heat supply part is provided with a catalyst for catalyzing the combustion of the methanol;

the setting mode of the catalyst comprises the following steps: the heat supply part is arranged at the bottom of the heat supply part; the multi-layer pore plates are arranged in layers; and/or coating is arranged on the outer wall of the heat conduction pipe.

9. The battery pack thermal regulation system of claim 5, wherein the first branch line, the third line and the fourth line are each provided with a temperature reduction assembly for reducing the temperature of the heat transfer medium flowing back to the heat transfer medium storage portion; the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage part and the current room temperature is lower than 20 ℃.

10. A new energy vehicle, characterized in that the new energy vehicle comprises the battery pack heat regulation system according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of new energy, in particular to a battery pack heat regulation and control system and a new energy vehicle.

Background

With the proposition of "carbon peak reaching" and "carbon emission reduction" commitments, and the consideration of energy safety, electric energy transportation equipment is gradually replacing traditional energy transportation equipment. The power driving device in the electric energy equipment is generally a battery, and the performance of the battery is a main influence factor influencing the cruising ability of transportation vehicles (such as new energy automobiles and the like).

In the prior art, lead-acid batteries, nickel-metal hydride batteries and lithium ion batteries are mainly used as common batteries. Lead acid has been gradually eliminated from the market due to its high pollution and low energy density. The nickel-metal hydride battery has high production cost and low energy density, and is gradually reduced in application in the field of new energy automobiles. Emerging lithium ion batteries (such as ternary lithium batteries and lithium iron phosphate batteries) are getting more and more attention and favored due to the advantages of high energy density, long cycle life, low self-discharge rate and the like. And the retired lithium ion battery is also being gradually applied to the fields of large-scale energy storage stations, base station communication storage batteries and the like. However, the lithium ion battery is sensitive to temperature, and when the ambient temperature is above 0 ℃, the decay rate of the battery capacity is slow, but when the temperature is too high, the thermal runaway phenomenon is easy to occur, thereby causing safety accidents. When the ambient temperature is reduced to below 0 ℃, the internal resistance of the battery is sharply increased along with the reduction of the temperature, and the attenuation speed of the battery capacity is accelerated. For example, the discharge capacity of a lithium iron phosphate battery at 0 ℃ is 88.05% of the capacity at 25 ℃, 65.52% of the capacity at 25 ℃ at-10 ℃, 38.88% of the capacity at 25 ℃ at-20 ℃, and the battery capacity sharply decreases. Therefore, the optimal working temperature of the lithium iron phosphate battery is in the temperature range of 20-30 ℃. The temperature in winter in northern China may be as low as-40 ℃, the temperature in summer in southern China may be as high as 40 ℃, and the performance of the conventional lithium battery is easily seriously reduced in the temperature conversion process in winter and summer. In addition, the mileage of the electric vehicle is halved in winter in the north, and even the report of 'groveling' is also rare.

At present, in order to solve the problem of battery capacity attenuation at low temperature, a battery pack is generally preheated by an electric heating mode before an electric vehicle is charged and started, the battery pack is preheated to a working temperature to improve the battery capacity of the electric vehicle, then charging and discharging are carried out, for example, a PTC element is adopted for electric heating, and 2-3 kWh of electric energy is consumed after one hour of continuous operation. According to the calculation of 6 kilometers of electricity per degree, the air conditioner heating only can cause the vehicle to attenuate the endurance mileage of 12-18 kilometers per hour, which seriously influences the use of users.

Therefore, the conventional battery cannot manage heat, is difficult to work normally in winter or low-temperature environment and summer or high-temperature environment, has short endurance mileage, needs to consume more electric energy, and has high cost.

Disclosure of Invention

The invention provides a battery pack heat regulation and control system and a new energy vehicle, aiming at the problems that a battery in the prior art cannot manage heat, is difficult to work normally in winter or low-temperature environment and summer or high-temperature environment, has short endurance mileage, needs to consume more electric energy and has higher cost.

The embodiment of the invention provides a battery pack heat regulation and control system, which comprises:

the fuel cell comprises a fuel storage device, a heat supply device connected with the fuel storage device, and a cell assembly;

the heat supply device comprises a heat supply part, a heat conduction pipe and a heat conduction medium storage part, wherein the heat supply part is used for catalytically burning the fuel flowing from the fuel storage device to generate heat; the heat conduction pipe is used for receiving the heat conduction medium flowing from the heat conduction medium storage part and heating the heat conduction medium by using the heat generated by the heat supply part to obtain the heated heat conduction medium;

and when the temperature of the battery assembly is lower than a first preset threshold value, the heated heat-conducting medium flows through the battery assembly so as to improve the temperature of the battery assembly.

The embodiment of the invention also provides a new energy vehicle which comprises the battery pack heat regulation and control system.

According to the battery pack heat regulation and control system provided by the embodiment of the invention, the fuel flowing from the fuel storage device is subjected to catalytic combustion through the heat supply part of the heat supply device in the system to generate heat, the heat conduction medium flowing from the heat conduction medium storage part is received through the heat pipe, and the heat generated by the heat supply part is utilized to heat the heat conduction medium, so that the heated heat conduction medium is obtained, and therefore, when the temperature of the battery pack is lower than a first preset threshold value, the heated heat conduction medium flows through the battery pack to improve the temperature of the battery pack, namely, the required heat is provided for the battery pack through the heat generation mode of fuel catalytic combustion, so that the battery pack can normally work under the scene of lower environmental temperature, the performance attenuation speed of the battery pack is obviously reduced, and the electricity utilization cost is also saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a first battery pack thermal regulation system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second battery pack thermal regulation system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third system for regulating heat of a battery assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fourth system for regulating heat of a battery assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fifth battery pack thermal regulation system according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating an arrangement of a temperature reducing assembly of a heat transfer medium return line according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

According to the battery pack heat regulation and control system provided by the embodiment of the invention, the heat exchange is carried out between the heat-conducting medium flowing through the heat-conducting pipe and the heat-conducting medium generated by catalytic combustion of the fuel, so that the heated heat-conducting medium is obtained, and when the temperature of the battery pack is detected to be lower than the first preset threshold value, the heated heat-conducting medium flows through the battery pack, so that the temperature of the battery pack is increased, the battery pack can normally work in winter or in a scene with lower ambient temperature, the attenuation speed of the battery capacity of the battery pack at low temperature is reduced, and compared with the traditional battery pack which is preheated by adopting an electric heating mode, the battery is normally used in a low-temperature environment, extra electric energy consumption is not required for heating, the power consumption is reduced, and the electricity consumption cost is reduced.

With reference to fig. 1, an embodiment of the present invention discloses a battery pack heat regulation system, including:

the fuel cell comprises a fuel storage device 01, a heat supply device connected with the fuel storage device 01, and a cell assembly 03; the heat supply device comprises a heat supply part 021, a heat conduction pipe 022 and a heat conduction medium storage part 023, wherein the heat supply part 021 is used for catalytically combusting fuel flowing from the fuel storage device 01 to generate heat; the heat conducting pipe 022 is configured to receive the heat conducting medium flowing from the heat conducting medium storage portion 023, and heat the heat conducting medium by using the heat generated by the heat supply portion 021, so as to obtain a heated heat conducting medium; when the temperature of the battery assembly 03 is lower than a first preset threshold value, the heated heat-conducting medium flows through the battery assembly 03 to increase the temperature of the battery assembly 03.

In the embodiment of the present invention, the fuel in the fuel storage device 01 is methanol or methanol aqueous solution. When the mole fraction of methanol in the fuel is more than 99 percent, the fuel is a pure methanol solution; when the mole fraction of the methanol in the fuel is 50-98%, the methanol is a methanol aqueous solution. For example, when the mole fraction of methanol in the fuel is 50%, the fuel is a mixed solution of methanol and water in a mole ratio of 1: 1.

In the heat supply device, heat is generated by the oxidation reaction of methanol. Wherein the combustion heat of the methanol is 723kJ/moL, the combustion temperature is 20-600 ℃, the evaporation heat is 35.32kJ/moL, the boiling point is 64.6 ℃, the evaporation heat of the water is 40.67kJ/moL, the boiling point is 100 ℃, compared with the water, the methanol is easier to evaporate, and more heat can be generated after combustion. The freezing point of pure methanol is-94 ℃, the closed flash point is 9.4 ℃, the freezing point of a 50 percent methanol solution (the volume fraction is about 57.71 percent) is-54.3 ℃, the boiling point is 76.4 ℃ and the closed flash point is 24.4 ℃. Methanol with different concentrations is not easy to freeze at low temperature, can be used as antifreeze of a power system, and can be carried on a vehicle for use in various working environments. The heat regulation and control system of the battery component provided by the embodiment of the invention can be highly adaptive to a methanol fuel energy system, only a single methanol raw material needs to be stored and transported in the whole process, and the transportation and the storage are very convenient. The methanol has less emission after being catalyzed and combusted, does not have the emission of formaldehyde, formic acid, sulfur oxide and nitrogen oxide, and is green and environment-friendly.

In the embodiment of the present invention, the heat supply part 021 is provided with a catalyst for catalyzing the combustion of methanol, and the catalyst contacts with the methanol and catalyzes the methanol to perform a flameless combustion reaction at normal temperature and normal pressure and release heat.

In an embodiment of the present invention, the catalyst is disposed in a manner including: is arranged at the bottom of the heat supply part 021; the layers are arranged on a multi-layer pore plate (not shown in the figure); and/or coated on the outer wall of the heat conductive pipes 022.

In one embodiment of the present invention, the catalyst in the form of spherical particles can be directly spread and disposed at the bottom of the heat supply part 021 (as shown in FIG. 1).

In another embodiment of the present invention, a plurality of layers of perforated plates are disposed in the heat supply part 021, and a catalyst can be spread and disposed on the plurality of layers of perforated plates in the heat supply part 021, so that the contact area between the fuel and the catalyst can be increased, and the catalytic combustion efficiency of the fuel can be further improved.

In another embodiment of the present invention, the outer wall of the heat conducting pipe 022 may be coated with the ground catalyst by dipping or spraying.

In the embodiment of the present invention, in order to ensure the normal operation of the heat regulating system of the battery pack, it is necessary to regulate the heat supply temperature of the heat supply part 021 to not exceed 600 ℃, preferably, the heat supply temperature of the heat supply part 021 is regulated to 200 ℃ to 600 ℃, and more preferably, the heat supply temperature is regulated to 200 ℃.

In the embodiment of the present invention, the heat-conducting medium storage portion 023 stores a heat-conducting medium, and the heat-conducting medium may be water, heat-conducting oil, molten salt, and the like, and preferably, water is used as the heat-conducting medium. The molten salt is a molten mass formed by melting a salt, for example, a molten mass of a halide, a nitrate or a sulfate of an alkali metal or an alkaline earth metal.

In the embodiment of the present invention, the operating temperature of the battery assembly 03 is usually between 20 ℃ and 30 ℃, and when the temperature of the battery assembly 03 is lower than 20 ℃, the battery needs to be preheated, that is, the temperature of the battery assembly 03 is increased, if the battery is to be charged. Therefore, the first preset threshold value here generally refers to the lowest temperature value at which the battery assembly 03 normally operates, i.e., 20 ℃.

In the embodiment of the invention, when the temperature of the battery assembly 03 is detected to be lower than 20 ℃, the heated heat-conducting medium can be regulated and controlled to flow through the battery assembly 03 so as to improve the temperature of the battery assembly 03, so that the battery assembly 03 can rapidly supplement heat in a low-temperature environment, and the capacity fading speed of the battery assembly 03 in the low-temperature environment is reduced.

Referring to fig. 2, in the embodiment of the present invention, the battery assembly 03 is provided with a first thermometer (not shown in the figure); the battery pack heat regulation and control system comprises a first temperature control unit 04, wherein the first temperature control unit 04 obtains the temperature of the battery assembly 03 through a first thermometer, and sets a first flow passing through the battery assembly 03 according to a first temperature control rule and the temperature of the battery assembly 03.

In an embodiment of the invention, the first thermometer is a temperature sensor. The first temperature control unit 04 includes a controller (not shown in the figure), and the controller may be a single chip microcomputer, such as a 51 single chip microcomputer.

The first flow rate refers to the amount of the heated heat transfer medium flowing through the battery assembly 03.

The first temperature control rule generally refers to a relationship between the temperature of the battery assembly 03 and the amount of the heated heat transfer medium flowing through the battery assembly 03. For example, when the temperature of the battery pack 03 is 20 ℃, the amount of the heated heat transfer medium flowing through the battery pack 03 is Q_A(ii) a When the temperature of the battery pack 03 is 25 ℃, the amount of the heated heat transfer medium flowing through the battery pack 03 is Q_BAnd the like. The specific corresponding relationship between the temperature and the first flow rate may be set according to actual needs of normal operation of the battery pack, and is not limited in the present invention.

The first thermometer and the first temperature control unit 04 can be connected in a wireless (e.g. bluetooth, WiFi, etc.) or wired manner. The first thermometer is used for monitoring the working temperature of the battery pack 03 in real time and transmitting the monitoring result to the first temperature control unit 04. The first temperature control unit 04 sets a first flow rate flowing through the battery assembly 03 according to the acquired temperature of the battery assembly 03 and according to a first temperature control rule and the temperature of the battery assembly 03. For example, when the first temperature control unit 04 obtains that the temperature of the battery assembly 03 is 20 ℃, the first flow rate flowing through the battery assembly 03 is set to be Q according to the first temperature control rule and the temperature of the battery assembly 03_A。

Referring to fig. 3, in the embodiment of the present invention, the heat supply part 021 is provided with a second thermometer (not shown) for measuring the heat supply temperature of the heat supply component; the battery pack heat regulation and control system includes a second temperature control unit 05, and the second temperature control unit 05 sets a second flow rate of the fuel flowing into the heat supply part 021 according to a second temperature control rule and the heat supply temperature.

In an embodiment of the invention, the second thermometer is a temperature sensor. The second temperature control unit 05 includes a controller (not shown), and the controller may be a single chip microcomputer, such as a 51-chip microcomputer.

The second flow rate refers to the amount of fuel flowing from the fuel storage device 01 into the heat supply part 021.

The second temperature control rule generally refers to a correspondence relationship between the temperature of the heating part 021 and the amount of fuel flowing into the heating part 021. For example, when the temperature of the heating part 021 is 200 ℃, the amount of fuel flowing into the heating part 021 is Q_C(ii) a When the temperature of the heat supply part 021 is 250 ℃, the amount of fuel flowing into the heat supply part 021 is Q_DAnd the like. The specific corresponding relationship between the temperature and the second flow rate can be set according to the actual heat requirement of the heat supply part 021, which is not limited in the present invention.

The second thermometer and the second temperature control unit 05 can be connected in a wireless (e.g. bluetooth, WiFi, etc.) or wired manner. The second thermometer is used for monitoring the temperature of the heat supply component of the heat supply part 021 in real time and transmitting the monitoring result to the second temperature control unit 05. The second temperature control unit 05 sets a second flow rate flowing into the heat supply part 021 according to the acquired temperature of the heat supply part 021 and according to a second temperature control rule and the heat supply temperature. For example, when the second temperature control unit 05 acquires that the temperature of the heat supply part 021 is 200 ℃, the second flow rate flowing into the heat supply part 021 is set to be Q according to the second temperature control rule and the temperature of the heat supply part 021_C。

Referring to fig. 4, in the embodiment of the present invention, the heat conductive pipes 022 are connected to a heat conductive medium storage 023 through first pipes 06, and the heat conductive medium in the heat conductive medium storage 023 flows into the heat conductive pipes 022 through the first pipes 06; the battery assembly 03 is provided with a first heat exchange structure (not shown in the figure), the first heat exchange structure and the heat conduction pipes 022 are connected through a second pipeline 07, and the heated heat conduction medium flowing out of the heat conduction pipes 022 flows into the first heat exchange structure through the second pipeline 07; the first heat exchange structure is arranged at the bottom or the periphery of the battery assembly 03, and the battery assembly 03 is heated by the heated heat-conducting medium; a third pipeline 08 is disposed between the heat transfer medium storage portion 023 and the first heat exchange structure, and the heat transfer medium flowing out of the first heat exchange structure flows back to the heat transfer medium storage portion 023 through the third pipeline 08.

With reference to fig. 5, in the embodiment of the present invention, the second pipeline 07 is provided with a first branch line 071, one end of the first branch line 071 is connected to the second pipeline 07, and the other end is connected to the heat-conducting medium storage 023; the first branch line 071 is provided with a flow rate adjustment valve (not shown in the figure) whose opening degree changes in accordance with the change in the flow rate of the third line 08.

Referring to fig. 5, in the embodiment of the present invention, a heating device 09 is further disposed between the heat supply part 021 and the heat-conducting medium storage part 023; the second pipeline 07 is provided with a second branch 072, one end of the second branch 072 is connected to the second pipeline 07, and the other end is connected with the warm air device 09; the warm air 09 is connected to the heat transfer medium storage portion 023 through a fourth line 010. The heater 09 is connected to the battery pack 03 through a fifth line 011.

Referring to fig. 5, in the embodiment of the present invention, the battery assembly 03 is provided with a second heat exchange structure (not shown); the fluid inlet of the second heat exchange structure is connected to the fuel outlet of the fuel storage device 01 through a sixth line 012; the fluid outlet of the second heat exchange structure is connected to the fuel inlet of the fuel storage device 01 through a seventh line 013; when the temperature of the battery assembly 03 is higher than a second preset threshold value, the temperature of the battery assembly 03 is reduced through the second heat exchange structure.

When the working temperature of the battery assembly 03 is high, the battery performance is obviously attenuated, and the battery assembly 03 is generally required to be cooled in time. Therefore, the second preset threshold value generally refers to the highest temperature value at which the battery assembly 03 maintains normal operation.

For example, if the maximum withstand temperature of a certain battery assembly is 70 ℃, the second preset threshold value may be set to 70 ℃. It should be noted that the maximum temperature that can be endured by batteries of different specifications and models during normal operation may be different, and therefore the second preset threshold may be specifically set according to the maximum endured temperature during normal operation of the battery.

In the embodiment of the present invention, the first branch line 071, the third line 08 and the fourth line 010 are all provided with a temperature reduction component (not shown in the figure), and the temperature reduction component is used for reducing the temperature of the heat-conducting medium flowing back to the heat-conducting medium storage portion 023. The cooling component can be an air cooler, and ambient air is used as cooling medium for cooling. Of course, the temperature reducing component may also be a heat dissipation fan (shown in fig. 6) disposed between the first branch line 071, the third line 08 and the fourth line 010 and the heat transfer medium storage portion 023. Through to the refluence heat-conducting medium of heat-conducting medium storage portion 023 cools down, can realize the temperature control to the heat-conducting medium in heat-conducting medium storage portion 023, avoids heat-conducting medium high temperature.

In the embodiment of the present invention, in order to ensure the normal operation of the system, it is generally required that the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage portion and the current room temperature is lower than 20 ℃. For example, when the current room temperature is 25 ℃, the temperature of the heat-conducting medium stored in the heat-conducting medium storage portion 023 is 40 ℃, the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage portion and the current room temperature is 15 ℃ (15 ℃ < 20 ℃).

In the embodiment of the present invention, when the battery assembly 03 needs to be heated, for example, when the battery assembly needs to be charged, in order to ensure that the battery assembly obtains the required heat to work normally, the temperature of the heat conducting medium flowing through the warm air device 09 and flowing into the first heat exchanging structure through the fifth pipeline 11 needs to be controlled to be lower than or equal to 70 ℃.

When the system is in operation, the fuel in the fuel storage device 01 flows into the heat supply part 021 of the heat supply device through a pipeline, contacts with the catalyst in the heat supply part 021, and generates flameless combustion under the catalytic action of the catalyst to provide heat, which is absorbed and accumulated by the heat conduction pipe 022 of the heat supply device, at this time, the heat-conducting medium stored in the heat-conducting medium storage part 023 flows into the heat conduction pipe 022 of the heat supply device through the first pipeline 06 and exchanges heat with the heat conduction pipe 022 to obtain the heated heat-conducting medium. The heated heat-conducting medium flows out of the heat-conducting pipe 022, enters the second pipeline 07, flows into the second branch pipe 072 through the second pipeline 07, and flows into the warm air device 09 through the second branch pipe 072, and the warm air device 09 can be connected with a heat supply system of a vehicle to provide a heat source for the vehicle.

When the battery assembly 03 needs to be heated, for example, when the battery assembly 03 needs to be charged, the heat-conducting medium flowing out of the heater 09 can be controlled by the second temperature control unit to flow into the battery assembly 03 through the fifth pipeline 011, and heat exchange is performed through the first heat exchange structure in the battery assembly 03, so that the required heat is provided for the battery pack in the battery assembly, and the heat-conducting medium after heat exchange can flow back to the heat-conducting medium storage portion 023 through the third pipeline 08 to be recycled.

When the battery assembly 03 does not need to be heated, the heat-conducting medium flowing out of the air heater 09 can be controlled by the second temperature control unit to directly flow back to the heat-conducting medium storage portion 023 through the fourth line 010 for recycling.

When the heating apparatus is in a start-up or stop state, the controllably heated heat-conducting medium flows back to the heat-conducting medium storage portion 023 through the first pipeline 06 and the first branch line 071.

When the system needs to regulate and control the heat supply temperature of the heat supply device, the flow of the heated heat-conducting medium can be regulated by regulating the opening degree of the valve flowing through the first branch line 071.

The following is a detailed method of using the battery pack heat regulation system provided by the embodiment of the invention in winter or when the outdoor temperature is low, and is as follows:

in the heat exchange process, the total energy Q in the system is derived from the heat generated by catalytic combustion of the fuel methanol and can be controlled by controlling the feeding amount of the methanol. The system heat supply Q' is the total energy Q and the heat loss Q of the heat supply device_fAnd heat transfer medium flow loss Q_vThe difference of the sums. Mass flow q of the second line 07 and the first line 06_m07And q is_m06Is the total mass flow of the system, which is the mass flow q of the first branch 071_m071And mass flow q of the second branch 072_m072And (4) summing.

Heat Q of second branch 072₀₇₂Heat quantity Q larger than 09 demand of warm air device₀₉Heat Q required by battery assembly 03₀₃. By adjusting the flow rate of the first branch line 071, the heat Q of the first branch line 071 can be realized₀₇₁In turn, adjusts the heat Q of the second branch 072₀₇₂. Second branch 072 heat Q₀₇₂Supplying heat Q for the heater 09₀₉011 heat Q of the fifth pipeline₀₁₁And a firstFour-line 010 heat Q₀₁₀And (4) summing. Adjusting the air volume L of the air heater 09 according to the required temperature t of the air heater 09₀₉Regulating Q₀₉. Fifth line 011 heat Q₀₁₁Heat Q for battery assembly 03₀₃And the third line 08 heat Q₀₈And (4) summing. Heat demand quantity Q₀₃To maintain the battery operating temperature range t_f(20 ℃ to 30 ℃) is required. The fifth line 011 is open when the temperature of the battery assembly 03 is lower than 20 deg.c. When the temperature of the battery pack 03 is heated from a low temperature to 25 ℃, the fifth line 011 dissipates heat Q between room temperature and room temperature_03fDemand regulation q_m011. When the room temperature is higher than 25 ℃, the fifth line 011 is closed. The first branch line 071, the fourth line 010 and the third line 08 have heat Q after forced natural heat exchange by the cooling fan₀₇₁’、Q₀₁₀', and Q₀₈'. The heat quantity of the heat-conducting medium after the three are mixed in the heat-conducting medium storage part 023 is Q₀₂₃Temperature t of heat transfer medium storage portion 023_023fMust not exceed room temperature t₀+20 ℃. When the temperature of the heat transfer medium storage part 023 exceeds t_023fThe fan blade rotating speed V of the cooling fan can be adjusted, the cooling air volume L is further adjusted, and the Q is reduced₀₇₁’、Q₀₁₀', and Q₀₈’。

When the new energy automobile battery pack heat regulation and control system is used in summer or in a working environment with a high outdoor temperature, the battery pack 03 needs to be cooled. The fuel in the fuel storage device 01 is sent to the second heat exchange structure of the cell assembly 03 through the sixth pipeline 012, the cell assembly 03 is cooled through the second heat exchange structure distributed inside the cell assembly 03, and the fuel absorbing the heat of the cell assembly 03 flows back to the fuel storage device 01 through the seventh pipeline 013. The sixth pipeline 012 is provided with an air cooler for cooling the fuel returned to the fuel storage device 01.

The embodiment of the invention also provides a new energy vehicle which comprises the battery pack heat regulation and control system. The new energy vehicles include, but are not limited to, new energy automobiles, buses, trains, subways, and the like.

The new energy vehicle adopting the battery pack heat regulation and control system provided by the embodiment of the invention can save the power consumption cost and obviously improve the endurance mileage of the vehicle.

Certainly, the battery pack heat regulation and control system provided by the embodiment of the invention can also be used for providing heat for a base station room, a storage battery and the like in winter so as to ensure that equipment is at a normal operating temperature; meanwhile, methanol can be used as a liquid cooling medium to cool high-temperature equipment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.