Liquid cooling assembly and energy storage device

Abstract

The application discloses a liquid cooling assembly and an energy storage device. The liquid cooling assembly comprises a connecting pipeline and a plurality of liquid cooling plates. The plurality of liquid cooling plates are arranged at intervals along a first direction. The liquid cooling plate comprises a main body part, a water inlet part and a water outlet part. The water inlet part and the water outlet part are connected with the main body part and extend away from the main body part. The main body part is internally provided with a cooling flow channel. The water inlet part is provided with a water inlet opening communicated with the cooling flow channel. The water outlet part is provided with a water outlet opening communicated with the cooling flow channel. The connecting pipeline comprises a water outlet pipeline and a water inlet pipeline. The water outlet pipeline is connected with the water outlet openings of the plurality of liquid cooling plates in sequence. The water inlet pipeline is connected with the water inlet openings of the plurality of liquid cooling plates in sequence. The water outlet pipeline and the water inlet pipeline are connected with an external liquid supply device. Compared with the prior art, the plurality of liquid cooling plates are arranged in parallel, and the structure is designed to be arranged at intervals along the first direction. Therefore, the cooling uniformity and the thermal management efficiency are effectively improved, and the local overheating risk is reduced.

Description

Technical Field

[0001] This application relates to the field of liquid cooling equipment technology, and in particular to a liquid cooling component and energy storage device. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage power stations, and hybrid power systems, the energy density of power batteries and energy storage batteries continues to increase, and the charge / discharge rate continues to rise. This significantly exacerbates the challenges of thermal management of battery packs under high-power operation, fast charging, and extreme environments (high / low temperatures). The consistency of battery temperature directly affects capacity utilization, cycle life, safety, and fast charging performance.

[0003] The common practice in existing battery pack thermal management solutions is to connect multiple liquid cooling plates in series within the same circuit, allowing coolant to flow sequentially through each plate and carry away heat. While this series connection method has the advantages of simple piping and easy layout, the accumulated temperature rise between the plates leads to amplified temperature differences, resulting in compromised cell consistency and lifespan. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this application provides a liquid cooling component and energy storage device, which connects multiple liquid cooling plates in parallel to reduce the inlet temperature difference between modules and significantly improve the consistency of cell operating temperature.

[0005] To achieve the above objectives, this application adopts the following technical solution: A liquid cooling assembly includes connecting pipes and multiple liquid cooling plates, which are spaced apart along a first direction. Each liquid cooling plate includes a main body, a water inlet, and a water outlet. The water inlet and the water outlet are both connected to the main body and extend away from the main body. The main body has a cooling channel inside. The water inlet has an inlet communicating with the cooling channel, and the water outlet has an outlet communicating with the cooling channel. The connecting pipes include an outlet pipe and an inlet pipe. The outlet pipe is sequentially connected to the outlets of the multiple liquid cooling plates, and the inlet pipe is sequentially connected to the inlets of the multiple liquid cooling plates. Both the outlet pipe and the inlet pipe are connected to an external liquid supply device.

[0006] In one embodiment, the water outlet pipeline includes a first pipeline and a second pipeline. The first pipeline is connected to the water outlets of two adjacent liquid cooling plates, and the second pipeline is connected to the first pipeline and is used to connect to an external liquid supply device.

[0007] In one embodiment, there are multiple first pipes, and along the arrangement direction of the multiple first pipes, the second pipe is connected to the first pipe located at the end of the multiple first pipes.

[0008] In one embodiment, the first conduit is at least partially corrugated, and the second conduit is at least partially corrugated.

[0009] In one embodiment, the water inlet pipeline includes a third pipeline and a fourth pipeline. The third pipeline is connected to the water inlets of two adjacent liquid cooling plates, and the fourth pipeline is connected to the third pipeline and is used to connect to an external liquid supply device.

[0010] In one embodiment, there are multiple third pipes, and the fourth pipe is connected to the third pipe located at the end of the multiple third pipes along the arrangement direction of the multiple third pipes.

[0011] In one embodiment, the water inlet and the water outlet are connected to the same side or different sides of the main body.

[0012] In one embodiment, the liquid cooling plate includes a main body and a fixing part. The fixing part is connected to both sides of the main body. One side of the fixing part is located on the same plane as the main body, and the other side is lower than the main body.

[0013] In one embodiment, the liquid cooling plate includes a main body and a collector. The main body has an opening on at least one side that communicates with the cooling channel. The collector is inserted into the opening to block the cooling channel. The collector has an outlet and an inlet.

[0014] In one embodiment, the water outlet pipe is plugged into or welded to the water outlet, and the water inlet pipe is plugged into or welded to the water inlet.

[0015] In one embodiment, the length of the first pipeline is 120mm~130mm.

[0016] In one embodiment, at least a portion of the first pipeline is a corrugated pipe with a diameter of 15mm to 25mm, and the remaining portion of the first pipeline has a diameter of 12mm to 22mm, wherein the diameter of the remaining portion of the first pipeline is smaller than that of the corrugated pipe.

[0017] In one embodiment, the thickness of the liquid cooling plate is 1 / 20 to 1 / 25 of the length of the first pipeline.

[0018] This application also provides an energy storage device, including a liquid cooling component and a battery box according to any of the above embodiments, wherein the liquid cooling component is disposed inside the battery box.

[0019] The beneficial effects of this application are as follows: This application provides a liquid cooling component and an energy storage device. The liquid cooling component includes connecting pipes and multiple liquid cooling plates. The multiple liquid cooling plates are spaced apart along a first direction. Each liquid cooling plate includes a main body, a water inlet, and a water outlet. Both the water inlet and the water outlet are connected to the main body and extend away from the main body. The main body has a cooling channel inside. The water inlet has an inlet communicating with the cooling channel, and the water outlet has an outlet communicating with the cooling channel. The connecting pipes include an outlet pipe and an inlet pipe. The outlet pipe is connected to the outlet of the multiple liquid cooling plates in sequence, and the inlet pipe is connected to the inlet of the multiple liquid cooling plates in sequence. Both the outlet pipe and the inlet pipe are connected to an external liquid supply device. Compared to existing technologies, this application, by arranging multiple liquid cooling plates in parallel and spaced apart in a first direction, effectively improves cooling uniformity and thermal management efficiency, reducing the risk of localized overheating. Simultaneously, the inlet pipes provide approximately isothermal inlet coolant to each liquid cooling plate, overcoming the temperature rise accumulation problem caused by traditional series arrangements and significantly reducing the inlet temperature difference between plates. Energy storage devices employing this type of liquid-cooled component effectively improve the operating temperature consistency of different battery modules. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a liquid cooling component according to this application is shown; Figure 2 Another structural schematic diagram of a liquid cooling assembly according to this application is shown; Figure 3 A cross-sectional schematic diagram of a liquid cooling component according to this application is shown; Figure 4 It shows Figure 3 Enlarged view of point A in the image; Reference numerals: 1. Liquid cooling plate; 11. Water outlet; 12. Water inlet; 13. Main body; 131. Cooling channel; 132. Opening; 14. Water outlet; 15. Water inlet; 16. Fixing part; 17. Collector; 2. Connecting pipes; 21. Outlet pipe; 211. First pipe; 212. Second pipe; 22. Inlet pipe; 221. Third pipe; 222. Fourth pipe; X. First direction. Detailed Implementation

[0021] In this application, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] See Figure 1 This application provides an energy storage device, including a liquid cooling component and a battery box. The liquid cooling component is disposed inside the battery box, which is used to load the battery. The liquid cooling component is used to cool the battery to maintain the battery within a suitable operating temperature range, thereby improving the thermal management efficiency and safety performance of the energy storage device.

[0025] See again Figure 1 The liquid cooling assembly includes a connecting pipe 2 and multiple liquid cooling plates 1. The multiple liquid cooling plates 1 are spaced apart along a first direction. Each liquid cooling plate 1 includes a main body 13, a water inlet 15, and a water outlet 14. Both the water inlet 15 and the water outlet 14 are connected to the main body 13 and extend away from the main body 13. The main body 13 has a cooling channel 131 inside. The water inlet 15 has an inlet 12 communicating with the cooling channel 131, and the water outlet 14 has an outlet 11 communicating with the cooling channel 131. The connecting pipe 2 includes an outlet pipe 21 and an inlet pipe 22. The outlet pipe 21 is connected to the outlets 11 of the multiple liquid cooling plates 1 in sequence, and the inlet pipe 22 is connected to the inlets 12 of the multiple liquid cooling plates 1 in sequence. Both the outlet pipe 21 and the inlet pipe 22 are connected to an external liquid supply device.

[0026] To describe clearly, Figure 1 The X direction can represent the first direction.

[0027] In practical applications, the battery box comprises multiple individual boxes, the number of which should match the number of liquid cooling plates 1. Each individual box contains one liquid cooling plate 1, and adjacent individual boxes can be detachably connected for easy installation and maintenance. Each liquid cooling plate 1 includes a main body 13, a water inlet 15, and a water outlet 14. Both the water inlet 15 and the water outlet 14 extend outward from the side edge or end of the main body 13, forming an interface area for easy connection with the connecting pipe 2. The main body 13 has a through-flow or baffled cooling channel 131 inside, the water inlet 15 has a water inlet 12 communicating with the cooling channel 131, and the water outlet 14 has a water outlet 11 communicating with the cooling channel 131.

[0028] Meanwhile, the connecting pipe 2 includes an inlet pipe 22 and an outlet pipe 21 that are sequentially connected to the interfaces of each liquid cooling plate 1 along the first direction. The two constitute the liquid supply pipe and the liquid return pipe, respectively. The inlet pipe 22 is sequentially connected to the inlet 12 of multiple liquid cooling plates 1, and the outlet pipe 21 is sequentially connected to the outlet 11 of multiple liquid cooling plates 1, so as to connect multiple liquid cooling plates 1 in parallel. When liquid is supplied, multiple liquid cooling plates 1 are supplied with liquid almost simultaneously, reducing the temperature difference between multiple liquid cooling plates 1.

[0029] Compared with the prior art, this application effectively improves the cooling uniformity and thermal management efficiency and reduces the risk of local overheating by arranging multiple liquid cooling plates 1 in parallel and using a structural design of spacing in the first direction. At the same time, the water inlet pipe 22 provides approximately isothermal inlet coolant to each liquid cooling plate 1, overcoming the problem of temperature rise accumulation caused by traditional series arrangement, significantly reducing the inlet temperature difference between plates, thereby improving the consistency of the working temperature of different battery modules.

[0030] See again Figure 1 The water outlet pipe 21 includes a first pipe 211 and a second pipe 212. The first pipe 211 is connected to the water outlet 11 of two adjacent liquid cooling plates 1 respectively. The second pipe 212 is connected to the first pipe 211 and is used to connect to an external liquid supply device.

[0031] In practical applications, the outlet pipe 21 consists of a first pipe 211 and a second pipe 212. The first pipe 211 is sealed at both ends to the outlets 11 of two adjacent liquid-cooled plates 1, allowing the heating and cooling liquids within the two liquid-cooled plates 1 to converge locally. Multiple first pipes 211 are arranged sequentially along the vertical direction of the liquid-cooled plates 1, and adjacent first pipes 211 are interconnected. The second pipe 212 is the return main pipe, extending along the first direction and converging with at least one first pipe 211, ultimately leading the coolant to an external liquid supply device for heat exchange. This structure effectively shortens the return path, reduces flow resistance and pressure drop, and improves system circulation efficiency.

[0032] See Figure 2There are multiple first pipes 211. Along the setting direction of the multiple first pipes 211, the second pipe 212 is connected to the first pipe 211 located at the end of the multiple first pipes 211.

[0033] In practical applications, along the first direction, multiple first pipes 211 are connected to the outlets 11 of adjacent liquid cooling plates 1 from bottom to top to form a graded confluence structure. For example, the bottommost first pipe 211 is connected to the top of the second pipe 212, so that the coolant flows from top to bottom to the return main pipe in stages, reducing the liquid flow resistance.

[0034] See again Figure 1 The first pipe 211 is at least partially corrugated, and the second pipe 212 is at least partially corrugated.

[0035] In practical applications, the first pipeline 211 and the second pipeline 212 adopt a corrugated pipe structure, which can effectively absorb the thermal expansion and contraction stress caused by temperature changes, reduce fatigue damage of the fixed part 16, and improve the sealing reliability and service life of the pipeline system; at the same time, the corrugated pipe has good flexibility, which facilitates on-site installation and alignment adjustment, and reduces assembly difficulty.

[0036] See again Figure 1 The water inlet pipe 22 includes a third pipe 221 and a fourth pipe 222. The third pipe 221 is connected to the water inlets 12 of two adjacent liquid cooling plates 1 respectively. The fourth pipe 222 is connected to the third pipe 221 and is used to connect to an external liquid supply device.

[0037] In practical applications, in the water inlet pipe 22, the two ends of the third pipe 221 are sealed and connected to the inlets 12 of two adjacent liquid cooling plates 1, respectively, to evenly distribute the coolant supplied by the external liquid supply device to each liquid cooling plate 1. Multiple third pipes 221 are sequentially arranged along the first direction and interconnected to form a graded liquid supply structure. The fourth pipe 222 serves as the main inlet pipe, extending along the first direction and merging with at least one third pipe 221, ensuring that the coolant is stably injected into each liquid cooling plate 1 from top to bottom or bottom to top. This design effectively balances the inlet flow of each liquid cooling plate 1, avoiding flow deviations caused by path differences, and further improving the accuracy of temperature consistency control.

[0038] Specifically, there are multiple third pipes 221, and along the arrangement direction of the multiple third pipes 221, the fourth pipe 222 is connected to the third pipe 221 located at the end of the multiple third pipes 221.

[0039] In practical applications, the fourth pipe 222 is connected to the uppermost or lowermost third pipe 221 to achieve tiered liquid supply from top to bottom or bottom to top. When coolant enters through the fourth pipe 222, it is sequentially distributed to the corresponding liquid cooling plates 1 via the third pipes 221 at each level, ensuring uniform cooling across all layers. Specifically, along the first direction, the bottom of the fourth pipe 222 is connected to the uppermost third pipe 221, allowing coolant to flow from top to bottom into each third pipe 221, and then be evenly delivered to the inlet 12 of each liquid cooling plate 1, achieving efficient and stable flow distribution.

[0040] In one embodiment, the third pipe 221 and the fourth pipe 222 are at least partially corrugated to accommodate deformation caused by thermal expansion and contraction during equipment operation, thereby improving the reliability and sealing of pipe connections and reducing assembly stress.

[0041] In one embodiment, the water inlet 15 and the water outlet 14 are connected to the same side or different sides of the main body 13. When the water inlet 15 and the water outlet 14 are connected to the same side, it is convenient to centrally arrange the pipelines, reduce the length of external pipes, and improve space utilization. When the water inlet 15 and the water outlet 14 are connected to the same side but different sides, the flow path of the coolant in the liquid cooling plate 1 can be effectively extended, thereby enhancing the heat exchange efficiency.

[0042] See again Figure 1 The liquid cooling plate 1 includes a main body 13 and a fixing part 16. The fixing part 16 is connected to both sides of the main body 13. One side of the fixing part 16 is located on the same plane as the main body 13, and the other side is lower than the main body 13.

[0043] In practical applications, the fixing part 16 and the main body 13 form a stepped structure. The fixing part 16 is mainly used to connect with the battery box to fix the liquid cooling plate 1. Specifically, the battery box usually has a boss inside, which overlaps with the fixing part 16 and is fixed together by bolts or adhesive. Heat insulation materials such as epoxy board can also be used between the two to insulate heat.

[0044] Specifically, since the upper surface of the fixing part 16 is lower than the upper surface of the main body 13 along the thickness direction of the liquid cooling plate 1, the boss of the battery box overlaps the upper surface of the fixing part 16. Therefore, when the battery module is placed in the box, the boss is set towards the battery module, so the boss of the battery box preferentially supports the battery module, avoiding the liquid cooling plate 1 from bearing the entire weight of the battery module, and effectively preventing the liquid cooling plate 1 from being deformed due to pressure and affecting the cooling performance.

[0045] See Figure 3 and Figure 4The liquid cooling plate 1 includes a main body 13 and a collector 17. The main body 13 has an opening 132 on at least one side that communicates with the cooling channel 131. The collector 17 is inserted into the opening 132 to block the cooling channel 131. The collector 17 is provided with a water outlet 14 and a water inlet 15.

[0046] In practical applications, the collector 17 is inserted into the opening 132 of the main body 13 and sealed and fixed by interference fit or welding to ensure the sealing reliability of the cooling channel 131. The water inlet 15 and water outlet 14 on the collector 17 are respectively connected to the water inlet pipe 22 and the water outlet pipe 21 to realize the orderly entry and exit of coolant. Preferably, the collector 17 and the main body 13 are connected by laser welding, which can achieve a high-strength and high-precision sealing connection and effectively prevent coolant leakage. The heat-affected zone of laser welding is small, which can ensure the structural stability of the connection between the collector 17 and the main body 13, while improving the overall pressure resistance.

[0047] In one embodiment, the water outlet pipe 21 is plugged into or welded to the water outlet 11, and the water inlet pipe 22 is plugged into or welded to the water inlet 12.

[0048] In practical applications, when the water outlet pipe 21 and the water outlet 11 or the water inlet pipe 22 and the water inlet 12 are connected by a plug-in joint, a sealing ring can be set to enhance the sealing performance of the connection, which is suitable for scenarios with frequent maintenance or requiring quick disassembly and assembly; when a welded connection is used, the overall sealing performance and pressure resistance of the structure can be further improved, which is suitable for applications with high reliability requirements.

[0049] In one embodiment, the length of the first pipe 211 is 120mm to 130mm. The length of the first pipe 211 can be 123mm, 124mm, 125mm, 126mm, 127mm, etc., and these specific values ​​are selected based on the optimized design of the liquid cooling system's spatial layout, taking into account both the reliability of the pipe connections and the ease of assembly. While ensuring a stable coolant flow rate, this effectively avoids stress concentration or installation interference problems caused by pipes that are too long or too short.

[0050] Meanwhile, the first conduit 211 consists of a corrugated pipe and a smooth pipe. Smooth pipes are connected to both ends of the corrugated pipe. The diameter of the corrugated pipe is designed to be 15mm~25mm, specifically, the diameter of the corrugated pipe can be 15mm, 16mm, 17mm, 18mm, 20mm, or 22mm. The diameter of the smooth pipe is 12mm~22mm, specifically, it can be 12mm, 14mm, 16mm, 18mm, or 20mm. Furthermore, the diameter of the smooth pipe is smaller than that of the corrugated pipe. The corrugated pipe enhances the flexibility of the conduit, effectively absorbing stress generated by vibration and thermal expansion and contraction, and reducing the mechanical load on the connection interfaces. The smooth pipe section ensures the stability of the flow channel and the sealing of the connection, making it particularly suitable for the frequent vibration working environment of the battery module.

[0051] It should be noted that corrugated pipes usually refer to pipe fittings with a periodic wavy structure, while smooth pipes refer to straight pipes with a smooth surface and no corrugation.

[0052] In one embodiment, the thickness of the liquid cooling plate 1 is 1 / 20 to 1 / 25 of the length of the first pipe 211. For example, when the first pipe 211 is 126 mm, the thickness of the liquid cooling plate 1 is 7 mm. This thickness design minimizes the volume and weight of the liquid cooling plate 1 while meeting structural strength requirements, which is beneficial for improving the utilization rate of the internal space of the battery pack. At the same time, this thickness, combined with the optimized layout of the internal flow channels, ensures uniform flow of coolant and improves heat dissipation efficiency.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0055] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A liquid cooling assembly, characterized in that, include: Multiple liquid cooling plates are spaced apart along a first direction. Each liquid cooling plate includes a main body, a water inlet, and a water outlet. Both the water inlet and the water outlet are connected to the main body and extend away from the main body. The main body has a cooling channel inside. The water inlet has an inlet communicating with the cooling channel, and the water outlet has an outlet communicating with the cooling channel. The connecting pipeline includes an outlet pipeline and an inlet pipeline. The outlet pipeline is sequentially connected to the outlets of multiple liquid cooling plates, and the inlet pipeline is sequentially connected to the inlets of multiple liquid cooling plates. Both the outlet pipeline and the inlet pipeline are connected to an external liquid supply device.

2. The liquid cooling assembly according to claim 1, characterized in that, The water outlet pipeline includes a first pipeline and a second pipeline. The first pipeline is connected to the water outlets of two adjacent liquid cooling plates, and the second pipeline is connected to the first pipeline and is used to connect to an external liquid supply device.

3. The liquid cooling assembly according to claim 2, characterized in that, There are multiple first pipelines, and along the arrangement direction of the multiple first pipelines, the second pipeline is connected to the first pipeline located at the end of the multiple first pipelines.

4. The liquid cooling assembly according to claim 2, characterized in that, The first conduit is at least partially corrugated, and the second conduit is at least partially corrugated.

5. The liquid cooling assembly according to claim 1, characterized in that, The water inlet pipeline includes a third pipeline and a fourth pipeline. The third pipeline is connected to the water inlets of two adjacent liquid cooling plates, and the fourth pipeline is connected to the third pipeline and is used to connect to an external liquid supply device.

6. The liquid cooling assembly according to claim 5, characterized in that, There are multiple third pipelines, and the fourth pipeline is connected to the third pipeline located at the end of the multiple third pipelines along the arrangement direction of the multiple third pipelines.

7. The liquid cooling assembly according to any one of claims 1 to 6, characterized in that, The water inlet and the water outlet are connected to the same side or different sides of the main body.

8. The liquid cooling assembly according to any one of claims 1 to 6, characterized in that, The liquid cooling plate includes a main body and a fixing part. The fixing part is connected to both sides of the main body. One side of the fixing part is located on the same plane as the main body, and the other side is lower than the main body.

9. The liquid cooling assembly according to any one of claims 1 to 6, characterized in that, The liquid cooling plate includes a main body and a collector. The main body has an opening on at least one side that communicates with the cooling channel. The collector is inserted into the opening to block the cooling channel. The collector has an outlet and an inlet.

10. The liquid cooling assembly according to any one of claims 1 to 6, characterized in that, The water outlet pipe is plugged into or welded to the water outlet, and the water inlet pipe is plugged into or welded to the water inlet.

11. The liquid cooling assembly according to claim 2, characterized in that, The length of the first pipeline is 120mm~130mm.

12. The liquid cooling assembly according to claim 11, characterized in that, The first pipeline is at least partially corrugated, with a diameter of 15mm to 25mm. The remaining portion of the first pipeline has a diameter of 12mm to 22mm, and the diameter of the remaining portion of the first pipeline is smaller than that of the corrugated pipe.

13. The liquid cooling assembly according to claim 11, characterized in that, The thickness of the liquid cooling plate is 1 / 20 to 1 / 25 of the length of the first pipeline.

14. An energy storage device, characterized in that, The invention includes the liquid cooling assembly and battery box as described in any one of claims 1 to 13, wherein the liquid cooling assembly is disposed inside the battery box.

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