Liquid cooling assembly and energy storage device

Abstract

The utility model discloses a liquid cooling assembly and an energy storage device, the liquid cooling assembly comprises a first liquid cooling part, a second liquid cooling part and a connecting part, the connecting part is provided with a main flow channel, a first flow channel and a second flow channel which are communicated with one another, the first flow channel is communicated with the first liquid cooling part, and the second flow channel is communicated with the second liquid cooling part; the main runner is used for communicating with an external liquid supply device or a liquid outlet device. Compared with the prior art, synchronous liquid supply of the first liquid cooling component and the second liquid cooling component is achieved through the connecting component, cooling liquid enters the first liquid cooling component and the second liquid cooling component at the same time through the first flow channel and the second flow channel, and the problem that the cooling liquid needs to sequentially flow through the two liquid cooling components in a traditional series structure is solved. The flow paths of the cooling liquid in the two liquid cooling components are mutually independent, the flow resistance superposition effect in a series structure is eliminated, the pressure balance at the inlets of the two liquid cooling components is ensured, the temperature of the cooling liquid in the two liquid cooling components is ensured to be consistent, and the problem of non-uniform cooling efficiency is solved.

Description

Technical Field

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

[0002] With the continuous improvement of power battery energy density and the popularization of fast charging technology, the power battery thermal management system faces increasingly severe heat dissipation requirements. To improve temperature uniformity, existing technologies have proposed a double-sided liquid cooling solution, which involves setting liquid cooling plates connected in series at the top and bottom of the battery module, allowing the coolant to flow through the bottom liquid cooling plate and the top liquid cooling plate in sequence to form a continuous flow channel.

[0003] However, it has the following inherent drawbacks: Superimposed flow resistance; the series structure results in a total flow resistance equal to the sum of the resistances of the two liquid cooling plates. When the coolant reaches the top liquid cooling plate, the pressure decreases significantly, and the flow rate drops, severely weakening the heat exchange efficiency of the top region. Temperature gradient imbalance; the bottom liquid cooling plate absorbs battery heat first, causing the initial temperature of the coolant flowing into the top liquid cooling plate to be already high, resulting in a significant difference in heat dissipation capacity between the top and bottom. Furthermore, under transient conditions, the coolant in the series piping needs to fill the bottom flow channel before reaching the top, resulting in a delayed response and an inability to promptly suppress the rapid rise in battery temperature. Utility Model Content

[0004] In view of the shortcomings of the prior art, this application provides a liquid cooling component that can improve the thermal insulation efficiency of the battery pack in the event of thermal runaway.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A liquid cooling assembly includes a first liquid cooling component, a second liquid cooling component, and a connecting component. The first liquid cooling component and the second liquid cooling component are respectively disposed on different sides of the material. The connecting component has a main flow channel, a first flow channel, and a second flow channel that are interconnected. The first flow channel is connected to the first liquid cooling component, and the second flow channel is connected to the second liquid cooling component. The main flow channel is used to connect to an external liquid supply device or a liquid outlet device.

[0007] In one embodiment, the second liquid cooling component includes a first cooling pipe and a second cooling pipe. Along the width direction of the second liquid cooling component, the first cooling pipe and the second cooling pipe are spaced apart. One end of the first cooling pipe is connected to the second flow channel, and the other end is connected to the second cooling pipe.

[0008] In one embodiment, the second liquid cooling component includes a first manifold and a second manifold, which are respectively connected to opposite ends of the first cooling pipe and to opposite ends of the second cooling pipe. The first manifold includes an inlet channel and an outlet channel that are not interconnected. The inlet channel is connected to the first cooling pipe, and the outlet channel is connected to the second cooling pipe. The first cooling pipe is connected to the second cooling pipe through the second manifold, and the second channel is connected to the first cooling pipe through the inlet channel.

[0009] In one embodiment, the first cooling pipe or the second cooling pipe includes a main body and a bent portion. The bent portion is connected to both ends of the main body. The bent portion extends in a zigzag pattern along the length of the main body.

[0010] In one embodiment, the first cooling pipe or the second cooling pipe includes a main body and protrusions. The main body is provided with a plurality of protrusions spaced apart along its length. The protrusions are located on one side of the main body in the width direction and are used to adhere to materials.

[0011] In one embodiment, the connecting component includes a first connector and a second connector. The first connector has the main flow channel, the first flow channel, and the second flow channel. The second liquid cooling component is connected to the second connector and the second flow channel.

[0012] The second connector includes a first part, a second part, and a third part. The second part and the first part are connected at an angle, and the second part and the third part are connected at an angle. The first part is connected to the second flow channel, and the third part is connected to the second liquid cooling component.

[0013] In one embodiment, the second part extends in a straight line or in a broken line.

[0014] In one embodiment, the first liquid cooling component has a first liquid cooling cavity, the second liquid cooling component has a second liquid cooling cavity, and the volume of the first liquid cooling cavity is larger than the volume of the second liquid cooling cavity; or,

[0015] The first liquid cooling component has a first liquid cooling surface, and the second liquid cooling component has a second liquid cooling surface. The area of ​​the first liquid cooling surface is larger than the area of ​​the second liquid cooling surface. Both the first liquid cooling surface and the second liquid cooling surface are used to adhere to the material.

[0016] In one embodiment, there are two connecting parts, which are connected to the same side of the first liquid cooling component. One of the connecting parts is used to connect to an external liquid supply device, and the other connecting part is used to connect to an external liquid outlet device.

[0017] This application also adopts the following technical solution to provide an energy storage device, including a liquid cooling component of any of the above embodiments, a housing, and a battery pack. The battery pack is disposed inside the housing, and the first liquid cooling component and the second liquid cooling component are respectively connected to different sides of the housing, and the first liquid cooling component and the second liquid cooling component are respectively attached to different sides of the battery pack.

[0018] The beneficial effects of this application are as follows: This application provides a liquid cooling assembly and energy storage device. The liquid cooling assembly includes a first liquid cooling component, a second liquid cooling component, and a connecting component. The connecting component has a main flow channel, a first flow channel, and a second flow channel that are interconnected. The first flow channel is connected to the first liquid cooling component, and the second flow channel is connected to the second liquid cooling component. The main flow channel is used to connect to an external liquid supply device or a liquid outlet device. Compared with the prior art, this application achieves synchronous liquid supply to the first and second liquid cooling components through the connecting component. The coolant enters the first and second liquid cooling components simultaneously through the first and second flow channels. This flow-dividing structure allows the coolant to reach both liquid cooling components simultaneously, avoiding the problem of the coolant having to flow through the two liquid cooling components sequentially in the traditional series structure. The flow paths of the coolant in the two liquid cooling components are independent of each other, eliminating the superposition effect of flow resistance in the series structure, ensuring pressure balance at the inlet of the two liquid cooling components, and ensuring that the coolant temperature in the two liquid cooling components is consistent, thus solving the problem of uneven cooling efficiency between the two liquid cooling components. Energy storage devices using this structure can significantly improve the overall heat dissipation efficiency of the battery pack, extend its service life, and ensure the stability and safety of system operation. Attached Figure Description

[0019] Figure 1 This paper shows an exploded structural diagram of a component of an energy storage device according to the present application;

[0020] Figure 2 An internal schematic diagram of an energy storage device according to this application is shown;

[0021] Figure 3 A schematic diagram of the structure of a box according to this application is shown;

[0022] Figure 4 A schematic diagram of the structure of a second liquid cooling component of this application is shown;

[0023] Figure 5 This shows a front view schematic diagram of a first cooling pipe according to the present application;

[0024] Figure 6 It shows Figure 4 Enlarged view of point A in the image;

[0025] Figure 7 A schematic diagram of the structure of a second part of this application is shown;

[0026] Reference numerals: 1. First liquid cooling component; 11. First liquid cooling surface;

[0027] 2. Second liquid cooling component; 21. First manifold; 211. Liquid inlet channel; 212. Liquid outlet channel; 22. Second manifold; 23. First cooling pipe; 24. Second cooling pipe; 231. Main body; 232. Protrusion; 233. Bending part; 25. Second liquid cooling surface;

[0028] 3. Connecting components; 31. First connecting piece; 32. Second connecting piece; 311. Main flow channel; 312. First flow channel; 313. Second flow channel; 321. First part; 322. Second part; 323. Third part;

[0029] 10. Liquid cooling assembly; 20. Housing; 30. Battery pack. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] See Figure 1This application provides an energy storage device, including a liquid cooling assembly 10, a housing 20, and a battery pack 30. The battery pack 30 is disposed inside the housing 20. The liquid cooling assembly 10 includes a first liquid cooling component 1 and a second liquid cooling component 2. The first liquid cooling component 1 and the second liquid cooling component 2 are respectively connected to different sides of the housing 20, and the first liquid cooling component 1 and the second liquid cooling component 2 are respectively attached to different sides of the battery pack 30.

[0034] In practical applications, the first liquid cooling component 1 and the second liquid cooling component 2 are located on different sides of the battery pack 30. For example, the first liquid cooling component 1 can be located at the bottom of the battery pack 30, and the second liquid cooling component 2 can be located at the top of the battery pack 30. The first liquid cooling component 1 mainly cools the bottom of the battery pack 30 to ensure uniform battery temperature distribution, while the second liquid cooling component 2 is responsible for heat dissipation at the top. Through this design, the overall temperature of the battery pack 30 is effectively controlled, extending battery life and improving the safety and stability of the energy storage device. The efficient heat dissipation performance of the liquid cooling component 10 ensures the reliability of the system under high load operation.

[0035] See Figure 2 and Figure 3 The liquid cooling assembly 10 also includes a connecting component 3, which has a main flow channel 311, a first flow channel 312, and a second flow channel 313 that are interconnected. The first flow channel 312 is connected to the first liquid cooling component 1, and the second flow channel 313 is connected to the second liquid cooling component 2. The main flow channel 311 is used to connect to an external liquid supply device or a liquid outlet device.

[0036] In practical applications, the first liquid cooling component 1 and the second liquid cooling component 2 are synchronously supplied with coolant via a connecting component 3. When the coolant enters the main flow channel 311 of the connecting component 3 from the external supply device, it is diverted to the first flow channel 312 and the second flow channel 313. The coolant enters the first liquid cooling component 1 through the first flow channel 312 and the second liquid cooling component 2 through the second flow channel 313. This diversion structure allows the coolant to reach both liquid cooling components simultaneously, avoiding the problem of the coolant needing to flow through the two liquid cooling components sequentially in traditional series structures. The flow paths of the coolant in the two liquid cooling components are independent. This structure eliminates the superposition effect of flow resistance in series structures, ensures pressure balance at the inlet of the two liquid cooling components, and guarantees consistent coolant temperature in both components, solving the problem of uneven cooling efficiency between the two liquid cooling components and further improving the system's heat dissipation performance.

[0037] See again Figure 2 There are two connecting parts 3, which are connected to the same side of the first liquid cooling part 1. One connecting part 3 is used to connect to an external liquid supply device, and the other connecting part 3 is used to connect to an external liquid outlet device.

[0038] In practical applications, the two connecting parts 3 can be symmetrically distributed and connected to the same side of the housing 20. The two connecting parts 3 are the liquid inlet connecting part 3 and the liquid outlet connecting part 3, respectively. This design not only simplifies the installation and maintenance process but also saves space and improves the overall compactness of the system. The external liquid supply device directly injects coolant into the first liquid cooling component 1 and the second liquid cooling component 2 through one of the connecting parts 3. After heat exchange, the coolant is discharged through the other connecting part 3 (the liquid outlet connecting part 3). The external liquid supply device can be a power unit for pumping coolant, such as a circulating water pump, and the external liquid outlet device can be a coolant collection tank after heat exchange. The circulating water pump enables the recycling of the coolant, ensuring continuous and efficient system operation.

[0039] See Figure 3 The second liquid cooling component 2 includes a first cooling pipe 23 and a second cooling pipe 24. The first cooling pipe 23 and the second cooling pipe 24 are arranged at intervals along the width direction of the second liquid cooling component 2. One end of the first cooling pipe 23 is connected to the second flow channel 313, and the other end is connected to the second cooling pipe 24.

[0040] In practical applications, the second liquid cooling component 2 is mainly used to cool the top surface of the battery pack 30. The top of the battery pack 30 typically refers to the side with the terminal posts. On this side, the heat generated by the battery pack 30 is mainly concentrated on the aluminum busbars connecting the terminal posts. Therefore, the second liquid cooling component 2 is mainly used to cool the aluminum busbars. Based on this, this application provides a first cooling pipe 23 and a second cooling pipe 24, which are arranged at intervals along the width direction. This is beneficial for cooling the multiple rows of aluminum busbars spaced apart on the battery pack 30. At the same time, since the width of the first cooling pipe 23 and the second cooling pipe 24 can be made similar to that of the aluminum busbars, it saves material for the second liquid cooling component 2. The inlet end of the first cooling pipe 23 is directly connected to the second flow channel 313, and the outlet end is connected to the second cooling pipe 24, so that the coolant flows from the outlet end of the first cooling pipe 23 to the second cooling pipe 24. The second cooling pipe 24 can extend along the length direction, and its end can be connected to an external liquid outlet device to realize the circulation of coolant in the second liquid cooling component 2.

[0041] It can be noted that the first cooling pipe 23 and the second cooling pipe 24 can be flat rectangular in shape to fit the structure of the aluminum busbar and increase the contact area with the aluminum busbar. The first cooling pipe 23 and the second cooling pipe 24 can be connected to the aluminum busbar by adhesive bonding.

[0042] See Figure 4The second liquid cooling component 2 includes a first manifold 21 and a second manifold 22. The first manifold 21 and the second manifold 22 are respectively connected to the opposite ends of the first cooling pipe 23. The first manifold 21 and the second manifold 22 are respectively connected to the opposite ends of the second cooling pipe 24. The first manifold 21 includes an inlet channel 211 and an outlet channel 212 that are not connected to each other. The inlet channel 211 is connected to the first cooling pipe 23, and the outlet channel 212 is connected to the second cooling pipe 24. The first cooling pipe 23 is connected to the second cooling pipe 24 through the second manifold 22. The second channel 313 is connected to the first cooling pipe 23 through the inlet channel 211.

[0043] In practical applications, the first manifold 21 and the second manifold 22 are respectively arranged opposite to each other along the length of the first cooling pipe 23. The first manifold 21 is responsible for the introduction and export of coolant, ensuring its smooth circulation between the first cooling pipe 23 and the second cooling pipe 24. Specifically, the first manifold 21 can adopt a hollow tubular structure, with an internal baffle dividing the cavity into an inlet channel 211 and an outlet channel 212. One end of the inlet channel 211 is connected to the second channel 313, and the other end is connected to the inlet of the first cooling pipe 23. One end of the outlet channel 212 is connected to the outlet of the second cooling pipe 24, and the other end can be connected to the outlet connection component 3. The two ends of the second manifold 22 are connected to the first cooling pipe 23 and the second cooling pipe 24 respectively. Coolant flows in from the first cooling pipe 23, is guided to the second cooling pipe 24 through the second manifold 22, forming a closed loop system and simultaneously forming a U-shaped loop, which significantly improves cooling efficiency. In addition, the U-shaped circuit design not only reduces the flow resistance of the coolant, but also optimizes the heat transfer path, ensuring uniform heat dissipation in all parts of the battery pack, thereby extending the battery's lifespan.

[0044] See Figure 5 The first cooling pipe 23 or the second cooling pipe 24 includes a main body 231 and a bent portion 233. Both ends of the main body 231 are connected to the bent portion 233. The bent portion 233 extends in a zigzag pattern along the length of the main body 231.

[0045] In practical applications, the first cooling pipe 23 and the second cooling pipe 24 can have the same structure. Both the first cooling pipe 23 and the second cooling pipe 24 are connected to the battery pack 30. Due to its own thermal effect, the battery pack 30 will experience thermal expansion, which will cause the first cooling pipe 23 and the second cooling pipe 24 to deform. The design of the bending part 233 can effectively absorb this deformation, avoid structural damage, and ensure stable system operation. Specifically, one end of the bending part 233 is connected to the first manifold 21 (or the second manifold 22), and the other end is connected to the main body 231. The bending part 233 itself extends in a fold line to form a buffer zone with a certain deformation capacity, absorbing vertical displacement, effectively coping with stress changes caused by thermal expansion, and ensuring a firm connection between the first cooling pipe 23 and the second cooling pipe 24.

[0046] See again Figure 5 The first cooling pipe 23 or the second cooling pipe 24 includes a main body 231 and a protrusion 232. The main body 231 is connected with a plurality of protrusions 232 at intervals along its length direction. The protrusions 232 are located on one side of the main body 231 in the width direction and are used to adhere to the material.

[0047] In practical applications, taking battery pack 30 as an example, the main component requiring heat dissipation at the top of battery pack 30 is the aluminum busbar. Therefore, the main body 231 is provided with protrusions 232 spaced along the length direction. Efficient heat conduction can be achieved simply by having the protrusions 232 adhere to the aluminum busbar. The protrusions 232 design increases the contact area, improving heat dissipation. Simultaneously, the protrusions 232 serve a positioning function; during installation, simply aligning the protrusions 232 with the aluminum busbar simplifies the installation process, ensures uniform heat dissipation of battery pack 30, and extends its service life. Furthermore, the shape of the protrusions 232 creates a wave-like water flow inside the first cooling pipe 23 and the second cooling pipe 24. The coolant generates tiny eddies during flow, further enhancing coolant turbulence and improving heat exchange efficiency.

[0048] The protrusions 232 are located on one side of the main body 231 in the width direction and are arranged at intervals, so that when the coolant flows through the main body 231, it can form multi-point contact through the protrusions 232, which not only disperses the heat conduction path, but also avoids contact gaps caused by uneven material surfaces. The directional arrangement of the protrusions 232 allows the cooling pipes to preferentially fit in a specific direction, which is especially suitable for scenarios with local heat source concentration, thereby improving heat dissipation uniformity and efficiency.

[0049] See again Figure 4 and Figure 6The connecting component 3 includes a first connecting member 31 and a second connecting member 32. The first connecting member 31 has a main channel 311, a first flow channel 312 and a second flow channel 313. The second liquid cooling component 2 is connected through the second connecting member 32 and the second flow channel 313. The second connecting member 32 includes a first part 321, a second part 322 and a third part 323. The second part 322 and the first part 321 are connected at an angle, the second part 322 and the third part 323 are connected at an angle, the first part 321 is connected to the second flow channel 313, and the third part 323 is connected to the second liquid cooling component 2.

[0050] In practical applications, the first connector 31 is mainly used to connect an external liquid supply device or a liquid outlet device to introduce external coolant into the first liquid cooling component 1 and the second liquid cooling component 2, or to export coolant from the first liquid cooling component 1 and the second liquid cooling component 2, ensuring smooth liquid circulation inside and outside the system. The second connector 32 is mainly used to connect the first connector 31 and the second liquid cooling component 2, ensuring that coolant can enter the second liquid cooling component 2. Simultaneously, due to the unique angled design of the second connector 32—specifically, the second part 322 forms specific angles with the first part 321 and the third part 323 respectively—the second part 322 can move to a certain extent in the horizontal direction, thereby absorbing the horizontal displacement of the second liquid cooling component 2 caused by the thermal expansion of the battery pack 30, ensuring the flexibility and stability of the connector, and reducing structural stress caused by thermal expansion.

[0051] See Figure 6 and Figure 7 The second part, 322, extends in a straight line or in a broken line.

[0052] In practical applications, the straight extension of the second part 322 connects the first part 321 and the third part 323 via the shortest path, reducing fluid flow resistance within the second part 322 and making it suitable for space-constrained scenarios. The zigzag extension of the second part 322, by forming at least one turning angle in its extension path, provides vertical deformation margin, and the turning point can absorb displacement caused by thermal expansion of the first cooling pipe 23 or the second cooling pipe 24. When the second part 322 adopts a straight shape, its angled connection structure with the first part 321 and the third part 323 ensures a linear transition in the overall flow channel, avoiding turbulence. When a zigzag shape is adopted, the turning point ensures structural strength while allowing for elastic deformation in the vertical direction. The choice between the two extension methods is based on flow channel layout requirements, achieving flow resistance control or stress dispersion through shape optimization.

[0053] See again Figure 3The first liquid cooling component 1 has a first liquid cooling cavity, and the second liquid cooling component 2 has a second liquid cooling cavity. The volume of the first liquid cooling cavity is larger than the volume of the second liquid cooling cavity. Alternatively, the first liquid cooling component 1 has a first liquid cooling surface 11, and the second liquid cooling component 2 has a second liquid cooling surface 25. The area of ​​the first liquid cooling surface 11 is larger than the area of ​​the second liquid cooling surface 25. Both the first liquid cooling surface 11 and the second liquid cooling surface 25 are used to adhere to the material.

[0054] In practical applications, the material can be taken as a battery pack 30. Since the heat at the bottom of the battery pack 30 is greater than that at the top, during the cooling process, the first liquid cooling component 1 is arranged at the bottom of the battery pack 30, and the second liquid cooling component 2 is arranged at the top. The coolant flow rate of the first liquid cooling component 1 is greater than that of the second liquid cooling component 2, so as to ensure that the heat at the bottom is dissipated more effectively and the heat at the top is moderately controlled, thereby achieving a balanced overall temperature of the battery pack 30 and extending its service life.

[0055] Specifically, the first liquid cooling component 1 includes a first liquid cooling cavity, and the second liquid cooling component 2 includes a second liquid cooling cavity. Both the first liquid cooling cavity and the second liquid cooling cavity are used to cool the battery pack 30. The volume of the first liquid cooling cavity is larger than that of the second liquid cooling cavity. Therefore, the first liquid cooling cavity can quickly remove the heat from the bottom with a larger flow rate of coolant, while the second liquid cooling cavity can regulate the temperature at the top with a smaller flow rate of coolant. The two work together to ensure that the internal temperature difference of the battery pack 30 is minimized and to prevent local overheating.

[0056] The first liquid cooling component 1 may also include a first liquid cooling surface 11, and the second liquid cooling component 2 includes a second liquid cooling surface 25. The area of ​​the first liquid cooling surface 11 is larger than the area of ​​the second liquid cooling surface 25. The first liquid cooling surface 11 quickly conducts heat from the bottom through a large area of ​​contact, while the second liquid cooling surface 25 precisely regulates the top temperature through a smaller area of ​​contact. Specifically, the second liquid cooling surface 25 is mainly used to cool the aluminum busbar. Therefore, the second liquid cooling surface 25 only needs to be in contact with the aluminum busbar to achieve effective control of the aluminum busbar temperature and avoid performance degradation caused by excessive temperature.

[0057] 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.

[0058] 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.

[0059] 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: First liquid cooling component; The second liquid cooling component, wherein the first liquid cooling component and the second liquid cooling component are respectively disposed on different sides of the material; The connecting component has a main flow channel, a first flow channel and a second flow channel that are interconnected. The first flow channel is connected to the first liquid cooling component and the second flow channel is connected to the second liquid cooling component. The main flow channel is used to connect to an external liquid supply device or a liquid outlet device.

2. The liquid cooling assembly according to claim 1, characterized in that, The second liquid cooling component includes a first cooling pipe and a second cooling pipe. Along the width direction of the second liquid cooling component, the first cooling pipe and the second cooling pipe are spaced apart. One end of the first cooling pipe is connected to the second flow channel, and the other end is connected to the second cooling pipe.

3. The liquid cooling assembly according to claim 2, characterized in that, The second liquid cooling component includes a first manifold and a second manifold, the first manifold and the second manifold being respectively connected to opposite ends of the first cooling pipe, and the first manifold and the second manifold being respectively connected to opposite ends of the second cooling pipe; The first manifold includes an inlet channel and an outlet channel that are not connected to each other. The inlet channel is connected to the first cooling pipe, and the outlet channel is connected to the second cooling pipe. The first cooling pipe is connected to the second cooling pipe through the second manifold, and the second channel is connected to the first cooling pipe through the inlet channel.

4. The liquid cooling assembly according to claim 2, characterized in that, The first cooling pipe or the second cooling pipe includes a main body and a bent portion. The bent portion is connected to both ends of the main body. The bent portion extends in a zigzag pattern along the length of the main body.

5. The liquid cooling assembly according to claim 2, characterized in that, The first cooling pipe or the second cooling pipe includes a main body and protrusions. The main body is provided with a plurality of protrusions spaced apart along its length. The protrusions are located on one side of the main body in the width direction and are used to adhere to materials.

6. The liquid cooling assembly according to any one of claims 1 to 5, characterized in that, The connecting component includes a first connector and a second connector. The first connector has the main flow channel, the first flow channel and the second flow channel. The second liquid cooling component is connected through the second connector and the second flow channel. The second connector includes a first part, a second part, and a third part. The second part and the first part are connected at an angle, and the second part and the third part are connected at an angle. The first part is connected to the second flow channel, and the third part is connected to the second liquid cooling component.

7. The liquid cooling assembly according to claim 6, characterized in that, The second part extends in a straight line or in a broken line.

8. The liquid cooling assembly according to any one of claims 1 to 5, characterized in that, The first liquid cooling component forms a first liquid cooling cavity, and the second liquid cooling component forms a second liquid cooling cavity, wherein the volume of the first liquid cooling cavity is larger than the volume of the second liquid cooling cavity; or, The first liquid cooling component has a first liquid cooling surface, and the second liquid cooling component has a second liquid cooling surface. The area of ​​the first liquid cooling surface is larger than the area of ​​the second liquid cooling surface. Both the first liquid cooling surface and the second liquid cooling surface are used to adhere to the material.

9. The liquid cooling assembly according to any one of claims 1 to 5, characterized in that, The number of connecting parts is two, and the two connecting parts are connected to the same side of the first liquid cooling part. One of the connecting parts is used to connect to an external liquid supply device, and the other connecting part is used to connect to an external liquid outlet device.

10. An energy storage device, characterized in that, The device includes the liquid cooling assembly as described in any one of claims 1 to 9, as well as a housing and a battery pack, wherein the battery pack is disposed inside the housing, the first liquid cooling component and the second liquid cooling component are respectively connected to different sides of the housing, and the first liquid cooling component and the second liquid cooling component are respectively attached to different sides of the battery pack.

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