Power battery liquid cooling system

Abstract

The utility model discloses a power battery liquid cooling system, which belongs to the technical field of automobile power battery heat dissipation, is used for heat dissipation and cooling of an automobile power battery, and comprises a liquid cooling plate, a liquid storage module and a liquid cooling module, the liquid cooling plate is used for heat exchange with the power battery, and the liquid storage module is connected with the liquid cooling plate through an external component to form a cooling loop. The cooling loop is used for driving a cooling medium to circularly flow in the cooling loop to exchange heat with the liquid cooling plate; the liquid cooling module comprises at least two compressors which are connected in parallel and a heat exchange module which is connected with the cooling loop and the compressors respectively, the heat exchange module is connected with the compressors to form a heat exchange loop in which a refrigerant flows, and the heat exchange loop is used for carrying out heat exchange on the cooling medium; when any compressor is damaged, the other compressors can continue to work, normal heat dissipation of the power battery cannot be affected, normal heat dissipation and cooling of the power battery can be guaranteed, core components are arranged in a centralized mode, the occupied space is small, and installation and maintenance are convenient.

Description

Technical Field

[0001] This application relates to the field of automotive power battery heat dissipation technology, specifically to a power battery liquid cooling system. Background Technology

[0002] The power battery is a core component of new energy vehicles, and the temperature of its operating environment has a significant impact on its safety, usability, and reliability. During operation, the power battery generates a large amount of heat, causing its temperature to rise. When the battery temperature rises to a certain level, it can lead to thermal runaway, and in severe cases, the power battery may catch fire or even explode, seriously endangering the safety of the vehicle and its occupants. Therefore, it is essential to dissipate heat from the power battery to ensure it operates within its optimal temperature range.

[0003] Application No. 202021035376.3 discloses a graded power battery liquid cooling system, and application No. 202111533597.2 discloses a power battery thermal management system and battery box. Both of their liquid cooling systems use a single compressor as the power component. When the compressor fails and stops working, it cannot dissipate heat from the cooling medium in the liquid cooling circuit, which will cause the temperature of the power battery to gradually rise, resulting in spontaneous combustion, affecting battery life and other safety issues. Utility Model Content

[0004] This application provides a liquid cooling system for power batteries to overcome the shortcomings of the prior art, and adopts the following technical solution:

[0005] A power battery liquid cooling system is used to dissipate heat and cool the automotive power battery, including a liquid cooling plate for heat exchange with the power battery, and further comprising:

[0006] A liquid storage module is connected to the liquid cooling plate via an external component to form a cooling circuit, which is used to drive the cooling medium to circulate in the cooling circuit and exchange heat with the liquid cooling plate.

[0007] The liquid cooling module includes at least two compressors connected in parallel, and a heat exchange module connected to the cooling circuit and the compressors respectively. The heat exchange module and the compressors form a heat exchange circuit in which a refrigerant flows, and the heat exchange circuit is used to exchange heat with the cooling medium.

[0008] During operation, if any of the compressors fails and stops working, the remaining compressors can still work with the heat exchange module to dissipate heat and cool the cooling medium, thereby preventing the compressors from stopping and failing to cool the cooling medium, which could lead to a gradual increase in the temperature of the power battery and a safety accident.

[0009] Preferably, the heat exchange module includes a condensing component, a throttling component, and a heat exchange component connected in sequence to the compressor, the cooling circuit is connected to the heat exchange component, and the refrigerant exchanges heat with the cooling medium through the heat exchange component to lower its temperature.

[0010] Preferably, the condensing component and the liquid storage module are respectively located at both ends of the compressor, the heat exchange component is installed on the outer wall of the compressor, and the throttling component is attached to the outside of the heat exchange component. This arrangement is compact, occupies little space, and is beneficial for heat dissipation.

[0011] Preferably, the condensing component includes a condenser and a heat dissipation component, the heat dissipation component being located on the side away from the compressor and opposite to the condenser. When the heat dissipation component is working, it can also simultaneously serve the liquid storage module, improving the heat dissipation efficiency of the cooling medium; wherein, the heat exchange component can be a plate heat exchanger or an evaporator.

[0012] Preferably, the liquid storage module includes a liquid storage tank, a supply component, and a connecting pipe. The connecting pipe connects the liquid storage tank, the supply component, the heat exchange module, and the external component. The supply component can drive the cooling medium to circulate.

[0013] Preferably, the system also includes a housing, in which both the liquid storage module and the liquid cooling module are housed, and the external components are mounted on the housing on one side of the liquid storage module. Concentrating the liquid storage module and the liquid cooling module within the housing avoids dispersed arrangement and facilitates maintenance and repair.

[0014] Preferably, the external components include an inlet connector and an outlet connector for connecting the liquid storage module and the heat exchange module to the liquid cooling plate.

[0015] Preferably, the system further includes a controller electrically connected to the liquid storage module and the liquid cooling module.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] (1) This application uses at least two independent compressors as power sources. The compressors are connected in parallel and connected to the heat exchange module, which can be used as a backup. When any compressor fails and stops, the remaining compressors can still work with the heat exchange module to cool the cooling medium and ensure the safety of the vehicle power battery. They can also work at the same time to improve the heat dissipation efficiency of the power battery and extend the service life of the power battery.

[0018] (2) Both the liquid cooling module and the liquid storage module are arranged in the box. The highly integrated and modular design results in a small box size, a small overall vehicle space occupation, and easy maintenance and subsequent repair.

[0019] (3) The condensing component and the liquid storage module are arranged at both ends of the compressor, and the compressors are arranged side by side. The heat exchange component is installed on the outer wall of the compressor, and the throttling component is attached to the outside of the heat exchange component. When the system is working, the condensing component can guide the air to dissipate heat and cool down the components in the box, which can effectively improve the heat dissipation efficiency and ensure that the components can work stably. Attached Figure Description

[0020] Figure 1 This is a simplified schematic diagram of this application;

[0021] Figure 2 This is a top view of this application;

[0022] Figure 3 This is a schematic diagram of the liquid cooling module structure of this application;

[0023] Figure 4 This is a three-dimensional schematic diagram of the liquid storage module of this application.

[0024] In the picture:

[0025] 1. Housing, 2. Liquid cooling module, 3. Liquid storage module, 4. Controller, 5. Connecting pipe, 6. Liquid storage tank, 7. Supply component, 8. Compressor, 9. Condensation component, 10. Throttling component, 11. Heat exchange component, 12. External component. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] See Figures 1 to 4 The following is a further detailed description of the power battery liquid cooling system of this application:

[0028] Combination Figure 1 and Figure 2A power battery liquid cooling system is used to dissipate heat and cool the automotive power battery. It includes a liquid storage module 3 and a liquid cooling module 2, as well as a liquid cooling plate for heat exchange with the power battery. The liquid storage module 3 and the liquid cooling module 2 are both located inside a housing 1, avoiding the dispersion of components in various parts of the vehicle. The external component 12 is located on the housing 1 near the side of the liquid storage module 3. The external component 12 includes an inlet connector and an outlet connector for connecting the liquid storage module 3 and the heat exchange module to the liquid cooling plate. There can be multiple inlet connectors and outlet connectors. By centrally housing the liquid storage module 3 and the liquid cooling module 2 inside the housing 1, the space occupied in the vehicle can be reduced, and maintenance and repair can be facilitated.

[0029] The liquid storage module 3 is connected to the liquid cooling plate via an external component 12 to form a cooling circuit. The liquid storage module 3 stores a cooling medium, which can drive the cooling medium to circulate in the cooling circuit and exchange heat with the liquid cooling plate. The cooling medium cools the liquid cooling plate, thereby cooling the power battery. The external component 12 is located on the housing 1 near the side of the liquid storage module 3. The external component 12 includes an inlet connector and an outlet connector for connecting the liquid storage module 3 and the heat exchange module to the liquid cooling plate. There can be multiple inlet connectors and outlet connectors.

[0030] Combination Figure 3 The liquid cooling module 2 includes a heat exchange module and at least two compressors 8 connected in parallel. The compressors 8 are arranged side-by-side, meaning their axes are parallel to each other. The liquid storage module 3 is connected to the heat exchange module. The compressors 8 and the heat exchange module form a heat exchange circuit with refrigerant flowing through them. This heat exchange circuit is used to exchange heat with the cooling medium within the liquid storage module 3. The heat exchange module includes a condensing component 9, a throttling component 10, and a heat exchange component 11 connected sequentially to the compressors 8. The liquid storage module is connected to the heat exchange component 11, and the refrigerant exchanges heat with the cooling medium through the heat exchange component 11 to lower its temperature.

[0031] In this embodiment, there are two compressors 8, which can be increased as needed. When any compressor 8 fails and stops, the remaining compressors 8 can still drive the heat exchange module to work normally, so as to ensure that the cooling medium can be continuously cooled. One can be used as a backup to ensure the stable operation of the power battery and avoid safety issues. Of course, they can also operate simultaneously to improve the heat dissipation efficiency of the power battery.

[0032] When the liquid cooling module 2 is working, the compressor 8 draws in low-temperature, low-pressure gaseous refrigerant and compresses it into high-temperature, high-pressure refrigerant gas. After being discharged, it enters the condensing component 9 to exchange heat with the outside air and condense into high-temperature, high-pressure liquid refrigerant. After passing through the throttling component 10, the refrigerant pressure decreases, changing from a high-temperature, high-pressure liquid to a low-temperature, low-pressure liquid. Then, it exchanges heat with the cooling medium flowing through the heat exchange component 11 to cool down. The refrigerant also changes from a liquid state to a low-temperature, low-pressure gaseous refrigerant, and is then drawn in by the compressor 8 for the next cycle, realizing the cyclical heat exchange and cooling of the cooling medium.

[0033] Combination Figure 2 and Figure 4 The liquid storage module 3 is connected to the liquid cooling plate via an external component 12 to form a cooling circuit. The liquid storage module 3 includes a liquid storage tank 6, a supply component 7, and a connecting pipe 5. The connecting pipe 5 connects the liquid storage tank 6, the supply component 7, the heat exchange module, and the external component 12. The liquid cooling plate is connected to all the aforementioned components via the external component 12 to form the cooling circuit. The liquid storage tank 6 stores the cooling medium, and the supply component 7 is a pump that drives the cooling medium to circulate. The supply component 7 and the liquid storage tank 6 are integrated on a connecting plate, which connects to one side of the tank body, allowing space for the connecting pipe 5. The liquid storage tank 6 is positioned above the supply component, corresponding to the heat exchange component, to facilitate the placement of the connecting pipe 5. The connecting pipe 5 sequentially connects to the inlet connector, the heat exchange component 11, the liquid storage tank 6, the supply component 7, and the outlet connector. In embodiments not shown, the liquid storage module 3 and the liquid cooling module 2 can also be separately configured.

[0034] The condensing component 9 includes a condenser and a heat dissipation component, wherein the heat dissipation component is a fan, and there may be multiple fans; the heat dissipation component is located on the side away from the compressor 8 and is arranged opposite to the condenser; the throttling component 10 may be a throttling valve or an expansion valve, used to cool and depressurize the refrigerant, regulate the flow rate, and control the cooling capacity; the heat exchange component 11 may be a plate heat exchanger or an evaporator, used to allow the refrigerant to absorb heat from the surrounding environment and the cooling medium and change from a liquid state to a gaseous state, so as to exchange heat and cool the cooling medium;

[0035] Combination Figure 3 In this embodiment, the condensing component 9 and the liquid storage module 3 are respectively located at both ends of the compressor 8, and the heat exchange component 11 is installed on the outer wall of the compressor 8. Figure 2The throttling component 10 is attached to the outside of the heat exchange component 11 and is positioned above the compressor and corresponding to the liquid storage tank. The liquid cooling module 2 is integrated on a mounting plate. This design integrates the heat exchange module and the compressor 8 on the mounting plate, resulting in a compact overall structure, small footprint, and easy airflow for heat dissipation. When the condensing component 9 is working, it can also dissipate heat from the liquid storage module 3 and the compressor 8, thereby improving heat dissipation efficiency and ensuring that all parts can work stably.

[0036] It also includes a controller 4, which is electrically connected to the liquid storage module 3 and the liquid cooling module 2. The controller 4 is electrically connected to the compressor 8, the condenser 9, the power unit, and the throttling unit 10; it can control a single compressor 8 to operate independently or multiple compressors 8 to operate together.

[0037] In one embodiment, the housing 1 may also be provided with heat dissipation holes; the heat dissipation holes provide a channel for air to enter the housing 1, dissipating heat from the liquid storage module 3 and the liquid cooling module 2 inside the housing 1, so that they can operate stably.

Claims

1. A power battery liquid cooling system for dissipating heat and cooling a vehicle's power battery, comprising a liquid cooling plate for exchanging heat with the power battery, characterized in that: Also includes: A liquid storage module is connected to the liquid cooling plate via an external component to form a cooling circuit, which is used to drive the cooling medium to circulate in the cooling circuit and exchange heat with the liquid cooling plate. The liquid cooling module includes at least two compressors connected in parallel, and a heat exchange module connected to the cooling circuit and the compressors respectively. The heat exchange module and the compressors form a heat exchange circuit in which a refrigerant flows, and the heat exchange circuit is used to exchange heat with the cooling medium.

2. The power battery liquid cooling system according to claim 1, characterized in that: The heat exchange module includes a condensing component, a throttling component, and a heat exchange component connected in sequence to the compressor. The cooling circuit is connected to the heat exchange component, and the refrigerant exchanges heat with the cooling medium through the heat exchange component to lower its temperature.

3. The power battery liquid cooling system according to claim 2, characterized in that: The condensing component and the liquid storage module are respectively located at both ends of the compressor, the heat exchange component is installed on the outer wall of the compressor, and the throttling component is attached to the outside of the heat exchange component.

4. The power battery liquid cooling system according to claim 2, characterized in that: The condensing component includes a condenser and a heat dissipation component, wherein the heat dissipation component is located on the side away from the compressor and is disposed opposite to the condenser.

5. The power battery liquid cooling system according to claim 2, characterized in that: The heat exchange component is an evaporator or a plate heat exchanger.

6. The power battery liquid cooling system according to claim 1, characterized in that: The liquid storage module includes a liquid storage tank, a supply component, and a connecting pipe. The connecting pipe connects the liquid storage tank, the supply component, the heat exchange module, and the external component. The supply component can drive the cooling medium to circulate.

7. The power battery liquid cooling system according to claim 1, characterized in that: It also includes a housing, in which the liquid storage module and the liquid cooling module are both housed, and the external component is located on the housing on one side of the liquid storage module.

8. The power battery liquid cooling system according to claim 7, characterized in that: The external components include an inlet connector and an outlet connector, used to connect the liquid storage module and the heat exchange module to the liquid cooling plate.

9. The power battery liquid cooling system according to claim 1, characterized in that: It also includes a controller that is electrically connected to the liquid storage module and the liquid cooling module.

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