An electric vehicle battery pack thermal management apparatus

Abstract

The application discloses a kind of electric vehicle battery pack thermal management equipment, including battery compartment, air cooling component, temperature raising component, liquid cooling component and evaporation component, the bottom of the battery compartment is equipped with several clamping frames, support net is equipped in clamping frame, the inner wall of battery compartment is equipped with several vertical boards corresponding clamping frame, battery pack is placed in clamping frame, battery pack is electrically connected with temperature sensor and controller, controller is electrically connected vehicle air conditioning refrigeration system, temperature raising component includes the baffle between battery pack one, baffle one is equipped with ventilation cavity, heating component is equipped in the leftmost ventilation cavity, the present application is cooled by air cooling component, liquid cooling component and evaporation component by different cooling mode, high temperature cooling and extremely fast cooling, to adapt to the different working conditions of battery compartment, simultaneously, high-temperature liquid is stored by temporary storage tank three, make full use of heat, reduce the consumption of electric power when low temperature starts.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, specifically to a thermal management device for electric vehicle battery packs. Background Technology

[0002] The battery pack is one of the core components of an electric vehicle. During operation, the battery pack generates a significant amount of heat. If this heat is not dissipated effectively, especially in hot weather, it can even lead to spontaneous combustion. Therefore, effective heat dissipation is crucial for ensuring battery safety. Conversely, at lower ambient temperatures, battery characteristics deteriorate significantly, affecting the electric vehicle's power and driving range. Thus, electric vehicles require a system to manage battery pack temperature, ensuring battery safety and stabilizing battery performance.

[0003] However, existing electric vehicle battery pack thermal management devices employ a single cooling method, which cannot adapt to different operating conditions, resulting in low cooling and heating efficiency and significant power consumption. Therefore, this invention provides an electric vehicle battery pack thermal management device to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal management device for electric vehicle battery packs to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a thermal management device for an electric vehicle battery pack, comprising a battery compartment, an air-cooling component, a heating component, a liquid-cooling component, and an evaporation component. The bottom of the battery compartment is provided with several snap-fit ​​frames, each containing a support mesh. The inner wall of the battery compartment is provided with several vertical plates corresponding to the snap-fit ​​frames. A battery pack is placed within each snap-fit ​​frame. The heating component includes a partition between the battery packs, each partition containing a ventilation cavity. A heating component is located in the leftmost ventilation cavity. Several heat-conducting pipes are provided on the left and right sides of the remaining ventilation cavities (excluding the leftmost one). The air-cooling component includes an air inlet pipe and an air outlet pipe. The rear ends of the heating component and the ventilation cavities are connected to the air inlet pipe, and the front ends of the heating component and the ventilation cavities are connected to the air outlet pipe, thus air-cooling the battery compartment.

[0006] The evaporation assembly includes a heat exchanger, with the right end of the air outlet pipe passing through the heat exchanger and the lower end of the air outlet pipe connected to a return pipe. The return pipe is connected to a storage tank, and a booster pump is installed on the return pipe. The outlet of the storage tank is connected to an atomizing nozzle, and the atomizing nozzle is connected to an air inlet pipe.

[0007] The liquid cooling assembly includes an inlet pipe, which is connected to the upper right side of the battery compartment. The end of the inlet pipe away from the battery compartment is connected to a storage tank 2. The storage tank 2 is connected to a heat exchanger 2. The heat exchanger 2 is connected to a temporary storage tank 3 through a pipe. The temporary storage tank 3 is connected to the liquid outlet at the bottom of the battery compartment.

[0008] As a further aspect of the present invention, the battery pack is electrically connected to a temperature sensor and a controller, and the controller is electrically connected to the vehicle air conditioning refrigeration system.

[0009] As a further embodiment of the present invention, the heat-conducting pipe is a vertical hollow pipe with uniformly distributed through holes on the pipe and a snap-fit ​​strip on the outside of the pipe. The snap-fit ​​strip is inserted into the partition plate to increase the contact area and improve the heat exchange efficiency.

[0010] As a further embodiment of the present invention, the heating component is composed of several parallel horizontal heating units, with air channels between the heating units to facilitate airflow.

[0011] As a further embodiment of the present invention, valve one is provided near the battery compartment of both the air inlet pipe and the air outlet pipe, and valve two is provided on the air inlet pipe. The left side of valve two is connected to the air outlet of the ventilator, and the air inlet of the ventilator is connected to the circulation pipe.

[0012] As a further embodiment of the present invention, the right end of the circulation pipe is connected to the air inlet pipe.

[0013] As a further embodiment of the present invention, the outlet is connected to the inlet pipe via an intermediate pipe for initial circulation.

[0014] As a further embodiment of the present invention, the temporary storage tank is connected to a heat storage tank, which is directly connected to the liquid inlet pipe through a pipeline. A booster pump is installed at the heat storage tank for storing high-temperature media.

[0015] As a further embodiment of the present invention, a filling layer is filled between the partition, the support mesh and the vertical plate. The filling layer is made of a porous material, which facilitates storage and conduction of the medium.

[0016] As a further embodiment of the present invention, both heat exchanger one and heat exchanger two are connected to the vehicle air conditioning refrigeration system via pipes for heat exchange.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention utilizes air-cooled components, liquid-cooled components, and evaporation components to perform daily cooling, high-temperature cooling, and rapid cooling through the coordinated use of different cooling methods, in order to adapt to different working conditions of the battery compartment.

[0019] 2. This invention uses three temporary storage tanks to store high-temperature liquids, making full use of heat and reducing power consumption during low-temperature startup. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of a thermal management device for an electric vehicle battery pack.

[0021] Figure 2 This is a top view schematic diagram of the liquid cooling component in a thermal management device for an electric vehicle battery pack.

[0022] Figure 3 This is a schematic diagram of the structure of the intermediate tube in a thermal management device for an electric vehicle battery pack.

[0023] Figure 4 This is a top view of the snap-fit ​​frame in a thermal management device for an electric vehicle battery pack.

[0024] Figure 5 This is a top view of the vertical plate structure in a thermal management device for an electric vehicle battery pack.

[0025] Figure 6 This is a system block diagram of a thermal management device for an electric vehicle battery pack.

[0026] In the diagram: 1. Battery compartment; 2. Battery pack; 3. Air inlet pipe; 4. Air outlet pipe; 5. Valve 1; 6. Valve 2; 7. Intermediate pipe; 8. Circulation pipe; 9. Fan 1; 10. Partition 1; 11. Heating assembly; 12. Heat conduction pipe; 13. Ventilation cavity; 14. Heat exchanger 1; 15. Return pipe; 16. Atomizing nozzle; 17. Storage tank 1; 18. Filling layer; 19. Liquid inlet pipe; 20. Storage tank 2; 21. Heat exchanger 2; 22. Temporary storage tank 3; 23. Heat storage tank; 24. Vertical plate; 25. Support mesh; 26. Snap-fit ​​frame. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-6In this embodiment of the invention, an electric vehicle battery pack thermal management device includes a battery compartment 1, an air-cooling component, a heating component, a liquid-cooling component, and an evaporation component. The bottom of the battery compartment 1 is provided with several snap-fit ​​frames 26, each containing a support mesh 25. The inner wall of the battery compartment 1 is provided with several vertical plates 24 corresponding to the snap-fit ​​frames 26. A battery pack 2 is placed within the snap-fit ​​frames 26. The battery pack 2 is electrically connected to a temperature sensor and a controller. The controller is electrically connected to an onboard air conditioning system. The heating component includes a partition 10 between the battery packs 2, each partition 10 containing a ventilation cavity 13. The leftmost ventilation cavity 13 contains a heating component 11. Except for the leftmost... Several heat-conducting pipes 12 are provided on both the left and right sides of the remaining ventilation cavities 13 outside the left ventilation cavity 13. The heat-conducting pipes 12 are vertical hollow pipes with uniformly distributed through holes. A snap-fit ​​strip is provided on the outside of the pipe. The snap-fit ​​strip is inserted into the partition 10 to increase the contact area and improve the heat exchange efficiency. The heating component 11 is composed of several parallel horizontal heating units. Air flow channels are left between the heating units to facilitate air flow. The air-cooling component includes an air inlet pipe 3 and an air outlet pipe 4. The rear ends of the heating component 11 and the ventilation cavity 13 are connected to the air inlet pipe 3, and the front ends of the heating component 11 and the ventilation cavity 13 are connected to the air outlet pipe 4 to air-cool the battery compartment 1.

[0029] The evaporation assembly includes a heat exchanger 14. The right end of the air outlet pipe 4 passes through the heat exchanger 14. The lower end of the air outlet pipe 4 is connected to the return pipe 15. The return pipe 15 is connected to the storage tank 17. A booster pump is installed on the return pipe 15. The outlet of the storage tank 17 is connected to the atomizing nozzle 16. The atomizing nozzle 16 is connected to the air inlet pipe 3. Both the air inlet pipe 3 and the air outlet pipe 4 are equipped with valves 5 near the battery compartment 1. The air inlet pipe 3 is equipped with a valve 6. The left side of the valve 6 is connected to the air outlet of the fan 9. The air inlet of the fan 9 is connected to the circulation pipe 8. The right end of the circulation pipe 8 is connected to the air inlet pipe 3.

[0030] The liquid cooling assembly includes an inlet pipe 19, which is connected to the upper right side of the battery compartment 1. The end of the inlet pipe 19 away from the battery compartment 1 is connected to a storage tank 20. The storage tank 20 is connected to a heat exchanger 21. The heat exchanger 21 is connected to a temporary storage tank 22 via a pipe. The temporary storage tank 22 is connected to the liquid outlet at the bottom of the battery compartment 1. The liquid outlet is connected to the inlet pipe 19 via an intermediate pipe 7 for initial circulation. The temporary storage tank 22 is connected to a heat storage tank 23. The heat storage tank 23 is directly connected to the inlet pipe 19 via a pipe. A booster pump is installed at the heat storage tank 23 for storing high-temperature media. A filling layer 18 is filled between the partition 10, the support net 25, and the vertical plate 24. The filling layer 18 is made of porous material to facilitate storage and conduction of media. The heat exchanger 14 and the heat exchanger 21 are both connected to the vehicle air conditioning refrigeration system via pipes for heat exchange.

[0031] The working principle of this invention is as follows: During operation, the temperature sensor determines the external temperature and the temperature inside the battery compartment 1. When the temperature inside the battery compartment 1 is between 25 and 50 degrees Celsius, the device only monitors it. When the temperature is below 25 degrees Celsius, the heating component 11 raises the temperature, the fan 9 starts, the valve 5 closes the air inlet pipe 3 and the air outlet pipe 4, and the valve 6 guides the air into the heating component 11. The heating component 11 heats the adjacent battery packs 2 through the partition 10, allowing the adjacent batteries to return to working status first, facilitating subsequent operations. At the same time, the air carries away the heat and circulates through the ventilation chamber 13 and the circulation pipe 8 to heat the batteries in the battery compartment 1. When the temperature inside the temporary storage tank 22 is higher than the specified value, the temporary storage tank 22 is connected to the liquid inlet pipe 19; otherwise, it is not connected, allowing the high-temperature liquid to be introduced into the battery compartment 1. After reaching the specified temperature, the heating component 11 and the temporary storage tank 22 are closed, and the liquid cooling component circulates through the intermediate pipe 7. The battery packs 2 operate normally. When the temperature exceeds the set value, intermediate pipe 7 closes, valve 5 and valve 6 open, air enters through air inlet pipe 3 and exits through air outlet pipe 4 for air cooling. When the temperature remains high, liquid enters through liquid inlet pipe 19, and the cooled liquid exchanges heat with battery pack 2 through filling layer 18, then is temporarily stored through temporary storage tank 22. Excess liquid exchanges heat with the vehicle air conditioning system through heat exchanger 21 for circulation. When the temperature of the liquid in temporary storage tank 22 reaches the specified value, and the temperature of the liquid in heat storage tank 23 is lower than the set value... When the temperature is constant, the booster pump of the heat storage tank 23 starts, storing the high-temperature liquid in the heat storage tank 23 and discharging the low-temperature liquid for heating during startup. When the temperature of the battery pack 2 rises sharply or remains high, exceeding the peak value, the storage tank 17 sprays the easily evaporable liquid into the air inlet pipe 3 through the atomizing nozzle 16. The liquid enters the ventilation chamber 13 with the airflow, absorbs heat, vaporizes, and then passes through the heat exchanger 14 for heat exchange. A portion of the vapor is recovered and used for rapid cooling of the battery compartment 1, improving the stability of the battery compartment 1.

[0032] This invention utilizes different cooling methods, including air-cooled components, liquid-cooled components, and evaporation components, for daily cooling, high-temperature cooling, and rapid cooling to adapt to different working states of the battery compartment 1. At the same time, it stores high-temperature liquid through temporary storage tank 22 to make full use of heat and reduce power consumption during low-temperature startup.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A thermal management device for an electric vehicle battery pack, comprising a battery compartment (1), an air-cooling component, a heating component, a liquid-cooling component, and an evaporation component, characterized in that, The bottom of the battery compartment (1) is provided with several snap-fit ​​frames (26), and a support net (25) is provided inside the snap-fit ​​frames (26). Several vertical plates (24) are provided on the inner wall of the battery compartment (1) corresponding to the snap-fit ​​frames (26). A battery pack (2) is placed inside the snap-fit ​​frames (26). The heating component includes a partition (10) between the battery packs (2). Each partition (10) is provided with a ventilation cavity (13). The leftmost ventilation cavity (13) is provided with a heating component (11). The left and right sides of the ventilation cavities (13) other than the leftmost ventilation cavity (13) are provided with several heat-conducting pipes (12). The air-cooling component includes an air inlet pipe (3) and an air outlet pipe (4). The rear ends of the heating component (11) and the ventilation cavity (13) are connected to the air inlet pipe (3). The front ends of the heating component (11) and the ventilation cavity (13) are connected to the air outlet pipe (4). The evaporation assembly includes a heat exchanger (14), the right end of the air outlet pipe (4) passes through the heat exchanger (14), the lower end of the air outlet pipe (4) is connected to the return pipe (15), the return pipe (15) is connected to the storage tank (17), a booster pump is installed on the return pipe (15), the outlet of the storage tank (17) is connected to the atomizing nozzle (16), and the atomizing nozzle (16) is connected to the air inlet pipe (3). The liquid cooling assembly includes an inlet pipe (19), which is connected to the upper right side of the battery compartment (1). The end of the inlet pipe (19) away from the battery compartment (1) is connected to the storage tank (20). The storage tank (20) is connected to the heat exchanger (21). The heat exchanger (21) is connected to the temporary storage tank (22) through a pipe. The temporary storage tank (22) is connected to the liquid outlet at the bottom of the battery compartment (1).

2. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The battery pack (2) is electrically connected to a temperature sensor and a controller, and the controller is electrically connected to the vehicle air conditioning refrigeration system.

3. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The heat-conducting pipe (12) is a vertical hollow pipe with through holes evenly distributed on the pipe. A snap-fit ​​strip is provided on the outside of the pipe and is inserted into the partition plate (10).

4. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The heating component (11) is composed of several parallel horizontal heating units, with air channels between the heating units.

5. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The air inlet pipe (3) and the air outlet pipe (4) are both equipped with valve 1 (5) near the battery compartment (1). The air inlet pipe (3) is equipped with valve 2 (6). The left side of valve 2 (6) is connected to the air outlet of fan 1 (9). The air inlet of fan 1 (9) is connected to the circulation pipe (8).

6. The electric vehicle battery pack thermal management device according to claim 5, characterized in that, The right end of the circulation pipe (8) is connected to the air inlet pipe (3).

7. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The outlet is connected to the inlet pipe (19) via an intermediate pipe (7).

8. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The temporary storage tank (22) is connected to the heat storage tank (23), which is directly connected to the liquid inlet pipe (19) through a pipeline. A booster pump is installed at the heat storage tank (23).

9. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, The partition (10), the support mesh (25) and the vertical plate (24) are all filled with a filling layer (18), which is made of porous material.

10. The electric vehicle battery pack thermal management device according to claim 1, characterized in that, Both heat exchanger one (14) and heat exchanger two (21) are connected to the vehicle air conditioning refrigeration system via pipes.

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