Liquid cooling energy storage battery box

Abstract

The utility model relates to the technical field of battery box cooling, in particular to a liquid cooling energy storage battery box which comprises a box cover, a battery module, a heat conduction pad and a liquid cooling module, the battery module is located between the box cover and the heat conduction pad, one side of the heat conduction pad is attached to the battery module, the other side of the heat conduction pad is attached to the liquid cooling module, and the liquid cooling module comprises a supporting plate. The supporting plate is at least provided with a first heat dissipation area and a second heat dissipation area, the second heat dissipation area surrounds the first heat dissipation area, a first liquid cooling pipeline is arranged in the first heat dissipation area, a second liquid cooling pipeline is arranged in the second heat dissipation area, and the heat dissipation speed of the first liquid cooling pipeline is higher than that of the second liquid cooling pipeline. According to the device, the battery packs in the central area and the peripheral area are independently cooled through the first liquid cooling pipeline and the second liquid cooling pipeline with different heat dissipation speeds, and compared with a traditional liquid cooling mode with the unified heat dissipation speed, the device can enable the temperature consistency of the whole battery module to be better.

Description

Technical Field

[0001] The utility model relates to the technical field of battery box cooling, in particular to a liquid-cooled energy storage battery box. Background Art

[0002] When the battery module is working, a large amount of heat will be generated. If the heat is not dissipated in time, the service life of the battery module will be affected. In the existing technology, natural cooling, air cooling or bottom liquid cooling plate cooling are usually used to cool the battery module. Generally, the efficiency of natural cooling and air cooling is relatively low. For the bottom liquid cooling plate cooling method, since the batteries are generally distributed in a matrix, the cooling speed at the bottom of the battery module is consistent. The battery pack located in the central area is far away from the outside world and the heat is difficult to dissipate outward. The heat of the battery located on the peripheral side can be directly dissipated outward. Therefore, the total heat dissipation speed of the battery pack in the central area is lower than the total heat dissipation speed of the battery packs on the surrounding areas, resulting in more serious battery temperature inconsistency, affecting the discharge performance. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that the cooling method of the liquid cooling plate at the bottom of the battery box easily causes inconsistent battery temperature and affects the discharge performance, and to propose a liquid-cooled energy storage battery box.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A liquid-cooled energy storage battery box includes a box cover, a battery module, a thermal pad, and a liquid cooling module. The battery module is located between the box cover and the thermal pad. The thermal pad is attached to the battery module on one side and to the liquid cooling module on the other side. The liquid cooling module includes a support plate. At least a first heat dissipation area and a second heat dissipation area are provided on the support plate, and the second heat dissipation area surrounds the first heat dissipation area. A first liquid cooling pipeline is provided in the first heat dissipation area, and a second liquid cooling pipeline is provided in the second heat dissipation area. The heat dissipation rate of the first liquid cooling pipeline is greater than the heat dissipation rate of the second liquid cooling pipeline.

[0006] The liquid cooling module includes a circulating pump and a cold liquid storage tank. The liquid inlet of the circulating pump is connected to the cold liquid storage tank, and the liquid outlet of the circulating pump is connected to a first liquid flow regulating valve and a second liquid flow regulating valve. The discharge end of the first liquid flow regulating valve is connected to one end of the first liquid cooling pipeline, and the other end of the first liquid cooling pipeline is connected to the cold liquid storage tank. The discharge end of the second liquid flow regulating valve is connected to one end of the second liquid cooling pipeline, and the other end of the second liquid cooling pipeline is connected to the cold liquid storage tank.

[0007] The liquid cooling module includes a first manifold, the first manifold having at least a first inlet, a first outlet, and a second outlet, the first inlet being connected to a liquid outlet of a circulation pump, the first outlet being connected to a first liquid cooling pipeline via a first liquid flow regulating valve, and the second outlet being connected to a second liquid cooling pipeline via a second liquid flow regulating valve;

[0008] And / or the liquid cooling module includes a second header, the second header has at least a second inlet, a third inlet, and a third outlet, the second inlet is connected to the first liquid cooling pipeline, the third inlet is connected to the second liquid cooling pipeline, and the third outlet is connected to the cold liquid storage tank.

[0009] The liquid cooling module includes a radiator having a fluid inlet end and a fluid outlet end. The fluid inlet end is communicated with a cold liquid storage tank, and the fluid outlet end is communicated with a liquid inlet of a circulation pump.

[0010] The liquid cooling module includes a first extension tube, a second extension tube, a third extension tube, and a fourth extension tube located on a side of the support plate away from the first liquid cooling pipeline. The first liquid flow regulating valve, the second liquid flow regulating valve, the first collecting pipe, and the second collecting pipe are all located at the end of the support plate. One end of the first liquid cooling pipeline is connected to the first liquid flow regulating valve through the first extension tube, and the other end of the first liquid cooling pipeline is connected to the second collecting pipe through the third extension tube. One end of the second liquid cooling pipeline is connected to the second liquid flow regulating valve through the second extension tube, and the other end of the second liquid cooling pipeline is connected to the second collecting pipe through the fourth extension tube.

[0011] The battery box includes a front panel, which is provided with a communication input plug-in, a communication output plug-in, a total negative plug-in, a maintenance switch, a total positive plug-in, an explosion-proof valve, a fire sprinkler, a BMU battery management unit, and a liquid cooling module controller. The liquid cooling module controller is electrically connected to the circulation pump, the first liquid flow regulating valve, and the second liquid flow regulating valve.

[0012] The utility model proposes a liquid-cooled energy storage battery box, which has the beneficial effect that: the device uses a first liquid cooling pipeline and a second liquid cooling pipeline with different heat dissipation speeds to separately dissipate heat to the battery packs in the central area and the surrounding areas. Compared with the traditional liquid cooling method with a uniform heat dissipation speed, the device can make the temperature consistency of the entire battery module better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a three-dimensional partial structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the upper local structure of the liquid cooling module of the present invention;

[0015] Figure 3This is a schematic diagram of the lower partial structure of the liquid cooling module of the present utility model;

[0016] Figure 4 This is a schematic diagram of the top view of the liquid cooling module of the present invention.

[0017] In the figure: box cover 1, battery module 2, thermal pad 3, front panel 4, liquid cooling module 5, support plate 6, first liquid cooling pipeline 7, second liquid cooling pipeline 8, first liquid flow regulating valve 9, second liquid flow regulating valve 10, first collecting pipe 11, first extension pipe 12, second extension pipe 13, third extension pipe 14, fourth extension pipe 15, cold liquid storage tank 16, radiator 17, circulation pump 18, first heat dissipation area 19, second heat dissipation area 20, second collecting pipe 21. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 4 A liquid-cooled energy storage battery box includes a box cover 1, a battery module 2, a thermal pad 3, and a liquid cooling module 5. The battery module 2 is located between the box cover 1 and the thermal pad 3. The thermal pad 3 is attached to the battery module 2 on one side and to the liquid cooling module 5 on the other side. The liquid cooling module 5 includes a support plate 6. At least a first heat dissipation area 19 and a second heat dissipation area 20 are provided on the support plate 6, and the second heat dissipation area 20 surrounds the first heat dissipation area 19. A first liquid cooling pipeline 7 is provided in the first heat dissipation area 19, and a second liquid cooling pipeline 8 is provided in the second heat dissipation area 20. The heat dissipation rate of the first liquid cooling pipeline 7 is greater than the heat dissipation rate of the second liquid cooling pipeline 8.

[0020] The liquid cooling module 5 of the present device is provided with a first heat dissipation area 19 and a second heat dissipation area 20. Each heat dissipation area is provided with a separate liquid cooling pipeline, and the heat dissipation speed of the first liquid cooling pipeline 7 is greater than the heat dissipation speed of the second liquid cooling pipeline 8. In this way, the battery packs in the central area and the surrounding areas are separately cooled by the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8 with different heat dissipation speeds. Compared with the traditional liquid cooling method with a uniform heat dissipation speed, the present device can make the temperature consistency of the entire battery module 2 better.

[0021] In order to achieve different heat dissipation rates in the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8, as an embodiment, the liquid cooling module 5 includes a circulating pump 18 and a cold liquid storage tank 16. The liquid inlet of the circulating pump 18 is connected to the cold liquid storage tank 16, and the liquid outlet of the circulating pump 18 is connected to the first liquid flow regulating valve 9 and the second liquid flow regulating valve 10. The discharge end of the first liquid flow regulating valve 9 is connected to one end of the first liquid cooling pipeline 7, and the other end of the first liquid cooling pipeline 7 is connected to the cold liquid storage tank 16. The discharge end of the second liquid flow regulating valve 10 is connected to one end of the second liquid cooling pipeline 8, and the other end of the second liquid cooling pipeline 8 is connected to the cold liquid storage tank 16. The cooling liquid in the cold liquid storage tank 16 is transported to the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8 by the circulating pump 18. By adjusting the different opening sizes of the first liquid flow regulating valve 9 and the second liquid flow regulating valve 10, the cooling liquid flow rate and flow rate inside the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8 are different, thereby achieving different heat dissipation rates.

[0022] To facilitate fluid delivery to each liquid cooling pipeline, the liquid cooling module 5 includes a first manifold 11. The first manifold 11 has at least a first inlet, a first outlet, and a second outlet. The first inlet is connected to the liquid outlet of the circulation pump 18, the first outlet is connected to the first liquid cooling pipeline 7 through a first liquid flow regulating valve 9, and the second outlet is connected to the second liquid cooling pipeline 8 through a second liquid flow regulating valve 10. The coolant pumped in by the circulation pump 18 is diverted to different liquid cooling pipelines through the first manifold 11.

[0023] And / or the liquid cooling module 5 includes a second manifold 21, the second manifold 21 has at least a second inlet, a third inlet, and a third outlet, the second inlet is connected to the first liquid cooling pipeline 7, the third inlet is connected to the second liquid cooling pipeline 8, and the third outlet is connected to the cold liquid storage tank 16, and the coolant of multiple liquid cooling pipelines is returned to the cold liquid storage tank 16 through the second manifold 21.

[0024] This device only uses the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8 as an implementation method. Of course, according to actual needs, a third liquid cooling pipeline, a fourth liquid cooling pipeline, etc. can also be provided.

[0025] refer to Figure 4 The liquid cooling module 5 includes a radiator 17. The radiator 17 has a fluid inlet end and a fluid outlet end. The fluid inlet end is connected to the cold liquid storage tank 16, and the fluid outlet end is connected to the liquid inlet of the circulation pump 18. The coolant is cooled by the radiator 17. The radiator 17 adopts a traditional air-cooled pipe flow-through heat dissipation method. Of course, other devices that can cool the coolant are also acceptable.

[0026] The liquid cooling module 5 includes a first extension pipe 12, a second extension pipe 13, a third extension pipe 14, and a fourth extension pipe 15 located on the side of the support plate 6 away from the first liquid cooling pipeline 7. The first liquid flow regulating valve 9, the second liquid flow regulating valve 10, the first collecting pipe 11, and the second collecting pipe 21 are all located at the end of the support plate 6. One end of the first liquid cooling pipeline 7 is connected to the first liquid flow regulating valve 9 through the first extension pipe 12, and the other end of the first liquid cooling pipeline 7 is connected to the second collecting pipe 21 through the third extension pipe 14. One end of the second liquid cooling pipeline 8 is connected to the second liquid flow regulating valve 10 through the second extension pipe 13, and the other end of the second liquid cooling pipeline 8 is connected to the second collecting pipe 21 through the fourth extension pipe 15.

[0027] refer to Figure 3 In this device, the inlet and outlet ends of the first liquid cooling pipeline 7 and the second liquid cooling pipeline 8 are set on the back of the support plate 6, and are drained to one end of the support plate 6 through an extension pipe, so that the first liquid flow regulating valve 9, the second liquid flow regulating valve 10, the first collecting pipe 11, and the second collecting pipe 21 are set in other positions. In this way, the liquid cooling module 5 can be relatively thin, reducing the space occupied by the internal space of the battery box.

[0028] The battery box includes a front panel 4, which is equipped with a communication input plug-in, a communication output plug-in, a total negative plug-in, a maintenance switch, a total positive plug-in, an explosion-proof valve, a fire sprinkler, a BMU battery management unit, and a liquid cooling module controller. The liquid cooling module controller is electrically connected to the circulation pump 18, the first liquid flow control valve 9, and the second liquid flow control valve 10. The liquid cooling module controller controls the operating status of the circulation pump 18, the first liquid flow control valve 9, and the second liquid flow control valve 10 to adjust the flow rate. A conventional temperature detection module is also installed within the box to adjust the operating mode of the liquid cooling module 5 according to the temperature. The battery modules are connected in series via copper busbars, which are connected to the maintenance switch total positive and negative plug-in. This allows the total positive and negative voltages of the battery modules to be connected to the front panel, facilitating quick installation and removal outside the box. The maintenance switch provides a quick power-off function. The liquid cooling baseplate gasket and the front mounting plate gasket enhance the finished product's protection level. The communication input and output plug-ins facilitate low-voltage communication connections between standard boxes. The fire sprinkler can be connected to an external fire protection system to provide fire protection for the battery pack. The battery module is a PS module, which is a large module with a simple structure and low cost. The box cover is a plastic cover, which is small in weight, low in price and has good insulation.

[0029] The above is only a preferred specific implementation method of the present invention, but the scope of protection of the present invention is not limited to this. Any technical solution, conception, and design obtained by equivalent replacement or modification of the technical solution and utility model concept of the present invention by any technical personnel familiar with the technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A liquid-cooled energy storage battery box, comprising a box cover (1), a battery module (2), a thermal pad (3), and a liquid cooling module (5), wherein the battery module (2) is located between the box cover (1) and the thermal pad (3), and the thermal pad (3) is attached to the battery module (2) on one side and to the liquid cooling module (5) on the other side, characterized in that: The liquid cooling module (5) comprises a support plate (6), at least a first heat dissipation area (19) and a second heat dissipation area (20) are arranged on the support plate (6), and the second heat dissipation area (20) surrounds the first heat dissipation area (19), a first liquid cooling pipeline (7) is arranged in the first heat dissipation area (19), and a second liquid cooling pipeline (8) is arranged in the second heat dissipation area (20), and the heat dissipation speed of the first liquid cooling pipeline (7) is greater than the heat dissipation speed of the second liquid cooling pipeline (8).

2. The liquid-cooled energy storage battery box according to claim 1, characterized in that: The liquid cooling module (5) comprises a circulation pump (18) and a cold liquid storage tank (16); the liquid inlet of the circulation pump (18) is connected to the cold liquid storage tank (16); the liquid outlet of the circulation pump (18) is connected to a first liquid flow regulating valve (9) and a second liquid flow regulating valve (10); the discharge end of the first liquid flow regulating valve (9) is connected to one end of the first liquid cooling pipeline (7); the other end of the first liquid cooling pipeline (7) is connected to the cold liquid storage tank (16); the discharge end of the second liquid flow regulating valve (10) is connected to one end of the second liquid cooling pipeline (8); the other end of the second liquid cooling pipeline (8) is connected to the cold liquid storage tank (16).

3. The liquid-cooled energy storage battery box according to claim 2, characterized in that: The liquid cooling module (5) comprises a first manifold (11), the first manifold (11) having at least a first inlet, a first outlet, and a second outlet, the first inlet being connected to a liquid outlet of a circulation pump (18), the first outlet being connected to a first liquid cooling pipeline (7) via a first liquid flow regulating valve (9), and the second outlet being connected to a second liquid cooling pipeline (8) via a second liquid flow regulating valve (10); And / or the liquid cooling module (5) includes a second header (21), the second header (21) having at least a second inlet, a third inlet, and a third outlet, the second inlet being connected to the first liquid cooling pipeline (7), the third inlet being connected to the second liquid cooling pipeline (8), and the third outlet being connected to the cold liquid storage tank (16).

4. The liquid-cooled energy storage battery box according to claim 3, characterized in that: The liquid cooling module (5) includes a radiator (17), the radiator (17) having a fluid inlet end and a fluid outlet end, the fluid inlet end being connected to a cold liquid storage tank (16), and the fluid outlet end being connected to a liquid inlet of a circulation pump (18).

5. The liquid-cooled energy storage battery box according to claim 3, characterized in that: The liquid cooling module (5) includes a first extension pipe (12), a second extension pipe (13), a third extension pipe (14), and a fourth extension pipe (15) located on a side of the support plate (6) away from the first liquid cooling pipeline 7. The first liquid flow regulating valve (9), the second liquid flow regulating valve (10), the first collecting pipe (11), and the second collecting pipe (21) are all located at the end of the support plate (6). One end of the first liquid cooling pipeline (7) is connected to the first liquid flow regulating valve (9) through the first extension pipe (12), and the other end of the first liquid cooling pipeline (7) is connected to the second collecting pipe (21) through the third extension pipe (14). One end of the second liquid cooling pipeline (8) is connected to the second liquid flow regulating valve (10) through the second extension pipe (13), and the other end of the second liquid cooling pipeline (8) is connected to the second collecting pipe (21) through the fourth extension pipe (15).

6. A liquid-cooled energy storage battery box according to any one of claims 2 to 5, characterized in that: The battery box comprises a front panel (4), wherein the front panel (4) is provided with a communication input plug-in, a communication output plug-in, a total negative plug-in, a maintenance switch, a total positive plug-in, an explosion-proof valve, a fire sprinkler, a BMU battery management unit, and a liquid cooling module controller, wherein the liquid cooling module controller is electrically connected to a circulation pump (18), a first liquid flow regulating valve (9), and a second liquid flow regulating valve (10).

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