Air cooling and liquid cooling mixed heat exchange device for battery cabinet

Abstract

The utility model discloses a battery cabinet air-liquid cooling mixed heat exchange device which comprises a liquid cooling loop and a refrigeration unit, and the liquid cooling loop comprises a liquid cooling unit, a first heat exchange assembly and a second heat exchange assembly which are sequentially connected in series; cooling liquid flows in the liquid cooling loop, and the liquid cooling unit is used for storing and driving the cooling liquid to circularly flow to cool the battery; the second heat exchange assembly and the refrigeration unit are connected in series to form a refrigeration loop, and the first heat exchange assembly and the refrigeration loop can independently or jointly cool the cooling liquid; according to different heat dissipation load conditions, the first heat exchange assembly can independently cool the cooling liquid or cool the cooling liquid together with the refrigerating circuit, and when the heat dissipation load is low, the refrigerating circuit does not need to be started; when the refrigerating circuit is started, the first heat exchange assembly can cool the cooling liquid firstly, and then the refrigerating circuit cools the cooling liquid again, so that the load of the refrigerating circuit can be reduced, the use of the refrigerating circuit is greatly reduced, the energy consumption is reduced, the abrasion of the compressor is reduced, the service life is prolonged, and the purposes of energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This application relates to the field of battery cabinet heat exchange technology, specifically to a battery cabinet air-liquid cooling hybrid heat exchange device. Background Technology

[0002] As a crucial component of energy storage and power supply systems, battery cabinets generate significant heat during the charging and discharging of their internal battery packs. If this heat cannot be dissipated promptly, the battery temperature will rise, impacting battery performance, safety, and lifespan. Therefore, a battery cabinet thermal management system is essential for ensuring the stable operation of the entire system.

[0003] like Figure 1 Currently, the main cooling system for energy storage batteries is liquid cooling. Liquid cooling uses liquid as the cooling medium, and the system is matched with a separate refrigeration system (heat pump). The refrigerant and liquid exchange heat through a heat exchanger to cool the liquid. The cooled liquid is then passed into the battery to remove the heat generated by the battery. The refrigeration system consumes a lot of energy when it is working. Moreover, the refrigeration system needs to run continuously after it is turned on. Under low heat dissipation load conditions (i.e., when the battery temperature is low), it cannot operate at the optimal low energy consumption condition, resulting in high system energy consumption. In addition, the continuous operation of the compressor will also affect its service life. Utility Model Content

[0004] This application provides a battery-to-air-liquid cooling hybrid heat exchange device to solve the problems existing in the prior art, and adopts the following technical solution:

[0005] A battery cabinet air-liquid cooling hybrid heat exchange device includes a liquid cooling circuit and a refrigeration unit. The liquid cooling circuit includes a liquid cooling unit, a first heat exchange component, and a second heat exchange component connected in series. Coolant flows within the liquid cooling circuit. The liquid cooling unit is used to store and drive the coolant to circulate and cool the battery. The second heat exchange component and the refrigeration unit are connected in series to form a refrigeration circuit. When the coolant flows through the first heat exchange component and exchanges heat with the outside air to cool down, it flows through the second heat exchange component and exchanges heat with the refrigerant within the second heat exchange component to cool down. The refrigeration unit cools the coolant by cooling the refrigerant.

[0006] Preferably, the refrigeration unit includes a compressor, a condenser, and a throttling component, and a refrigerant that exchanges heat with the coolant flows within the refrigeration circuit.

[0007] Preferably, the liquid cooling unit includes a power unit and a water tank, the power unit, the compressor and the water tank are arranged side by side, and the second heat exchange component is installed on the outer peripheral sidewall of the power unit and the compressor.

[0008] More preferably, the condenser and the first heat exchange component are respectively and perpendicularly disposed at the same end of the compressor and the power unit, and the first heat exchange component and the condenser are disposed opposite to each other.

[0009] Preferably, the second heat exchange component includes a first channel and a second channel, wherein the first channel is connected to the liquid cooling unit and the second channel is connected to the refrigeration unit.

[0010] Preferably, the first heat exchange component is a radiator, and the second heat exchange component is an evaporator.

[0011] Preferably, it further includes at least one air intake component, which is disposed opposite to the first heat exchange component.

[0012] Preferably, both the refrigeration unit and the liquid cooling circuit are housed inside the enclosure, and the enclosure is provided with an air inlet.

[0013] Preferably, it also includes a detection component for detecting the temperature of the coolant.

[0014] Preferably, the system further includes a controller electrically connected to the detection component, the first heat exchange component, and the refrigeration unit, which controls the first heat exchange component and the refrigeration unit to work individually or together based on the feedback signal from the detection component.

[0015] The beneficial effects of this application are as follows:

[0016] This application combines liquid cooling and air cooling. Liquid cooling and air cooling can cool the coolant independently or together. Under low heat load conditions, the coolant is cooled by air cooling through the first heat exchange component. This can meet the heat dissipation requirements according to the heat dissipation conditions, avoid the refrigeration unit doing extra work and causing unnecessary energy consumption, save energy and protect the environment. At the same time, it reduces the wear of the compressor, increases its service life, and thus increases the overall service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing technology principle;

[0018] Figure 2 This is a schematic diagram illustrating the principle of this application;

[0019] Figure 3 This is a schematic diagram of the structure of this application.

[0020] In the picture:

[0021] 1. Liquid cooling unit; 11. Power unit; 12. Water tank;

[0022] 2. Refrigeration unit; 21. Compressor; 22. Condenser; 23. Throttling component;

[0023] 3. First heat exchange component; 31. Radiator; 32. Air intake component;

[0024] 4. Second heat exchange component;

[0025] 100. Liquid cooling circuit; 200. Refrigeration circuit. 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 2 to 3 Further explanation of this application:

[0028] Combination Figure 2 A battery cabinet air-liquid cooling hybrid heat exchange device includes a housing, a liquid cooling circuit 100, and a refrigeration unit 2. The housing has an air inlet. Coolant flows in the liquid cooling circuit 100. The liquid cooling circuit 100 includes a liquid cooling unit 1, a first heat exchange component 3, and a second heat exchange component 4 connected in series. That is, when the coolant flows in the liquid cooling circuit 100, it passes through the liquid cooling unit 1, the first heat exchange component 3, and the second heat exchange component 4 in sequence. In this way, the coolant first undergoes preliminary heat exchange and cooling through the first heat exchange component 3, and then undergoes further cooling through the second heat exchange component 4.

[0029] The refrigeration unit 2 and the liquid cooling circuit 100 are located inside the housing; the liquid cooling unit 1 is used to store and drive the coolant to circulate and cool the battery; the second heat exchange component 4 is connected in series with the refrigeration unit 2 to form a refrigeration circuit 200, and the first heat exchange component 3 and the refrigeration circuit 200 can cool the coolant individually or together.

[0030] In this embodiment, the first heat exchange component 3 is a radiator 31, and the second heat exchange component 4 is an evaporator. It is understood that the second heat exchange component 4 includes a first channel and a second channel, the first channel being connected to the liquid cooling unit 1, and the second channel being connected to the refrigeration unit 2. During operation, the refrigerant in the refrigeration circuit 200 and the coolant in the liquid cooling circuit 100 exchange heat within the second heat exchange component 4, transferring heat from the coolant to the refrigerant.

[0031] The refrigeration unit 2 includes a compressor 21, a condenser 22, and a throttling component 23, which can be an expansion valve. A refrigerant flows within the refrigeration circuit 200, exchanging heat with the coolant. In use, the compressor 21 compresses the refrigerant into a high-temperature, high-pressure gas, which is then delivered to the condenser 22 for heat dissipation and condensation. The gas is then delivered to the throttling component 23, where it transforms the refrigerant into a low-temperature, low-pressure refrigerant. This refrigerant then enters the second heat exchange assembly 4 to exchange heat with the coolant before returning to the compressor 21 for further compression. This cycle repeats, using phase-change heat exchange to cool the coolant.

[0032] Compared to existing technologies, this application combines air cooling and liquid cooling, allowing for independent or combined heat exchange and cooling of the coolant. Under low heat load conditions, air cooling alone is sufficient to meet heat dissipation requirements, preventing the refrigeration circuit from operating under low heat dissipation conditions and causing unnecessary energy loss and wear. While meeting battery heat dissipation requirements, it can significantly reduce power consumption and extend the service life of the compressor 21. When water cooling and liquid cooling work together, the coolant is first heated by air cooling, followed by heat exchange by liquid cooling. Under the same heat dissipation conditions, this application consumes less energy and has a longer service life compared to existing technologies, achieving energy conservation and environmental protection goals.

[0033] Combination Figure 3 The liquid cooling unit 1 includes a power unit 11 and a water tank 12. The power unit 11, the compressor 21, and the water tank 12 are arranged side by side (with their axes parallel). The power unit 11 is a pump used to drive the coolant to circulate in the liquid cooling circuit 100, exchanging heat with the battery through a cold plate to transfer the battery's heat to the coolant, thereby cooling the battery. The water tank 12 is used to supply coolant to the liquid cooling circuit 100. The second heat exchange component 4 is installed on the outer peripheral sidewall of the power unit 11 and the compressor 21. This arrangement is compact and occupies little space.

[0034] The condenser and the first heat exchange assembly 3 are sequentially and vertically disposed at the same end of the compressor 21 and the power unit 11, with the first heat exchange assembly 3 and the condenser 22 arranged opposite each other. The first heat exchange assembly 3 further includes at least one fan assembly 32, which is arranged opposite to the first heat exchange assembly 3. The fan assembly 32 can be a fan, which can introduce outside air into the housing for cooling through an air inlet. In this embodiment, there are two fan assemblies 32. Figure 3The unit consists of an exhaust fan assembly 32, a first heat exchange assembly, and a condenser 22 arranged sequentially from top to bottom. These components are arranged in parallel and perpendicularly to the compressor 21 and the power unit 11 on the same side. This arrangement facilitates airflow, reduces airflow resistance, and improves the heat exchange effect on the condenser 22 and the first heat exchange assembly 32. It can also simultaneously dissipate heat from the compressor 21 and the power unit 11, thereby ensuring the temperature inside the housing and achieving better heat dissipation.

[0035] When the air intake assembly 32 is closed, it facilitates natural convection between the air and the first heat exchange assembly and the condenser 22 to achieve heat dissipation. When the air intake assembly 32 is open, it can force air to convect with the first heat exchange assembly to achieve heat exchange. There is no need to install a separate fan to dissipate heat from the condenser 22. When the refrigeration circuit 200 participates in heat dissipation, the air intake assembly 32 can simultaneously exchange heat with the first heat exchange assembly 3 and the condenser 22 to improve the heat dissipation effect on the coolant. In some embodiments, the first heat exchange assembly 3 may also be provided with a heating device, which may be a heating rod.

[0036] It also includes a controller and a detection component. The detection component is used to detect the temperature of the coolant. The controller is electrically connected to the detection component, the first heat exchange component 3 and the refrigeration unit 2, and controls the first heat exchange component 3 and the refrigeration unit 2 to work individually or together according to the feedback signal from the detection component.

[0037] When the battery temperature is low, the temperature of the coolant used to cool the battery is also correspondingly low. At this time, both the air intake assembly 32 and the cooling circuit 200 are in the off state, and the heat dissipation requirement can be met by natural convection between the air and the first heat exchange assembly.

[0038] As the coolant temperature increases, the induced draft assembly 32 and the refrigeration circuit 200 are turned on sequentially.

[0039] When the air intake component 32 is turned on, it draws in or blows air to drive airflow, forcing it to dissipate heat with the first heat exchange component 3, thereby further improving the cooling effect on the coolant to meet the heat dissipation requirements of the battery. In this way, under low heat dissipation load, there is no need to start the refrigeration circuit 200, which can greatly reduce the use of the compressor 21, reduce energy consumption and wear of the compressor 21, and achieve the purpose of energy saving and environmental protection.

[0040] When the refrigeration circuit 200 is turned on, since the first heat exchange component 3 is located in front of the second heat exchange component 4, the first heat exchange component 3 can cool the coolant first. The refrigeration circuit 200 can then cool the coolant again, thereby reducing the load on the refrigeration circuit 200 and thus reducing its energy consumption.

Claims

1. A battery cabinet air-liquid cooling hybrid heat exchange device, characterized in that: The device includes a liquid cooling circuit and a refrigeration unit. The liquid cooling circuit includes a liquid cooling unit, a first heat exchange component, and a second heat exchange component connected in series. Coolant flows within the liquid cooling circuit. The liquid cooling unit stores and drives the coolant to circulate and cool the battery. The second heat exchange component is connected in series with the refrigeration unit to form a refrigeration circuit. When the coolant flows through the first heat exchange component and exchanges heat with the outside air to cool down, and then flows through the second heat exchange component and exchanges heat with the refrigerant within the second heat exchange component to cool down, the refrigeration unit cools the coolant by cooling the refrigerant.

2. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 1, characterized in that: The refrigeration unit includes a compressor, a condenser, and a throttling component, and a refrigerant that exchanges heat with the coolant flows within the refrigeration circuit.

3. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 2, characterized in that: The liquid cooling unit includes a power unit and a water tank, which are arranged side by side. The second heat exchange component is installed on the outer peripheral sidewall of the power unit and the compressor.

4. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 3, characterized in that: The condenser and the first heat exchange component are respectively and perpendicularly arranged at the same end of the compressor and the power unit, and the first heat exchange component and the condenser are arranged opposite each other.

5. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 2, characterized in that: The second heat exchange component includes a first channel and a second channel, wherein the first channel is connected to the liquid cooling unit and the second channel is connected to the refrigeration unit.

6. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 1, characterized in that: The first heat exchange component is a radiator, and the second heat exchange component is an evaporator.

7. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 1, characterized in that: It also includes at least one air intake component, which is disposed opposite to the first heat exchange component.

8. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 1, characterized in that: Both the refrigeration unit and the liquid cooling circuit are housed inside the enclosure, which has an air inlet.

9. The battery cabinet air-liquid cooling hybrid heat exchange device according to any one of claims 1 to 8, characterized in that: It also includes a detection component for detecting the temperature of the coolant.

10. The battery cabinet air-liquid cooling hybrid heat exchange device according to claim 9, characterized in that: It also includes a controller, which is electrically connected to the detection component, the first heat exchange component and the refrigeration unit, and controls the first heat exchange component and the refrigeration unit to work individually or together according to the feedback signal from the detection component.

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