Liquid cooling plate assembly, liquid cooling assembly, energy storage device, and vehicle

Abstract

The present application provides a liquid cooling plate assembly, a liquid cooling assembly, an energy storage device, and a vehicle. The liquid cooling plate assembly comprises liquid cooling plates, first connector portions, and second connector portions. Each first connector portion comprises a first connecting section and a first inserting section. Each second connector portion comprises a second connecting section and a second inserting section. The first connecting sections and the second connecting sections all extend in the thickness direction of the liquid cooling plates. The first inserting sections and the second inserting sections all extend in the length or width direction of the liquid cooling plates.

Description

Liquid cooling plate assembly, liquid cooling assembly, energy storage device and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202422310897X filed on September 20, 2024 with the China Patent Office, the whole content of the above application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of vehicle, in particular to a liquid cooling plate assembly, a liquid cooling assembly, an energy storage device and a vehicle. BACKGROUND

[0003] With the development of technology, the battery pack inside the energy storage device is getting larger and larger, and the number of stacked battery packs is getting more and more. In the process of commercial vehicles gradually changing to electric drive, three or even four layers of stacked battery packs have appeared. At present, the cooling of the stacked battery pack is usually connected through the bending pipe section and the interface of the liquid cooling plate extending along the thickness direction. SUMMARY

[0004] However, through this connection mode, the bending radius of the pipe between the adjacent two liquid cooling plates is large, which reduces the space configured to arrange the battery pack in the thickness direction of the liquid cooling plate, and reduces the energy density of the energy storage device.

[0005] In a first aspect, a liquid cooling assembly is provided, comprising

[0006] a liquid cooling plate having an inlet and an outlet;

[0007] a first joint portion provided on the liquid cooling plate and arranged in a curved manner, the first joint portion comprising a first connecting segment and a first plug-in segment connected to each other, the first connecting segment extending along the thickness direction of the liquid cooling plate, one end of the first connecting segment away from the first plug-in segment being in communication with the inlet, the first plug-in segment extending along the length or width direction of the liquid cooling plate;

[0008] a second joint portion provided on the liquid cooling plate and arranged in a curved manner, the second joint portion comprising a second connecting segment and a second plug-in segment connected to each other, the second connecting segment extending along the thickness direction of the liquid cooling plate, one end of the second connecting segment away from the second plug-in segment being in communication with the outlet, the second plug-in segment extending along the length or width direction of the liquid cooling plate.

[0009] In a second aspect, an embodiment of the present application provides a liquid cooling assembly, comprising:

[0010] a plurality of liquid cooling plate assemblies, the plurality of liquid cooling plate assemblies being arranged at intervals along the thickness direction of the liquid cooling plate;

[0011] The liquid inlet pipeline has a first conveying inlet and a plurality of first conveying outlets, the first conveying inlet is arranged to be in communication with the liquid cooling system, and the plurality of first conveying outlets are in communication with a plurality of first plug-in sections;

[0012] The liquid return pipeline has a second liquid return inlet and a plurality of second liquid return outlets, the second liquid return inlet is arranged to be in communication with the liquid cooling system, and the plurality of second liquid return outlets are in communication with a plurality of second plug-in sections.

[0013] In a third aspect, an embodiment of the present application provides a power storage device, comprising:

[0014] The liquid cooling assembly;

[0015] A plurality of battery packs are arranged between adjacent liquid cooling plate assemblies.

[0016] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising the power storage device. Advantages

[0017] In the embodiments of the present application, the design of the liquid inlet and the liquid outlet ensures that the cooling liquid can smoothly enter and exit the liquid cooling plate, thereby improving the heat exchange efficiency. The first connecting section is arranged to extend along the thickness direction of the liquid cooling plate, so that the first connecting section is arranged perpendicularly to the liquid cooling plate. In this way, due to the perpendicular connection, the occurrence of vortex and turbulence is reduced, and the energy loss of the fluid when entering the liquid cooling plate is also reduced. This means that more energy is retained in the fluid, which is arranged to drive the flow of the fluid in the liquid cooling plate and to exchange heat with the heat source, thereby improving the heat exchange efficiency. The first plug-in section is arranged to extend along the length or width direction of the liquid cooling plate, so that the first plug-in section is parallel to the liquid cooling plate. In this way, the pipeline can be connected to the first plug-in section without bending, which is more convenient to operate and reduces the requirement for installation space. It is ensured that the space arranged to arrange the battery pack in the thickness direction of the liquid cooling plate is sufficient, thereby avoiding the reduction of the energy density of the power storage device. The second connecting section is arranged to extend along the thickness direction of the liquid cooling plate, so that the second connecting section is arranged perpendicularly to the liquid cooling plate. In this way, due to the perpendicular connection, the occurrence of vortex and turbulence is reduced, and the energy loss of the fluid when entering the liquid cooling plate is also reduced. This means that more energy is retained in the fluid, which is arranged to drive the flow of the fluid in the liquid cooling plate and to exchange heat with the heat source, thereby improving the heat exchange efficiency. The second plug-in section is arranged to extend along the length or width direction of the liquid cooling plate, so that the second plug-in section is parallel to the liquid cooling plate. In this way, the pipeline can be connected to the second plug-in section without bending, which is more convenient to operate and reduces the requirement for installation space. It is ensured that the space arranged to arrange the battery pack in the thickness direction of the liquid cooling plate is sufficient, thereby avoiding the reduction of the energy density of the power storage device. In addition, when the liquid cooling plate needs to be connected to the pipeline, the curved arrangement of the first joint part and the second joint part can also reduce the number of joints. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic diagram of a liquid cooling plate assembly according to some embodiments of the present application;

[0019] Fig. 2 is a structural schematic diagram of a liquid cooling assembly according to some embodiments of the present application;

[0020] Fig. 3 is a perspective schematic diagram of the liquid cooling assembly shown in Fig. 2;

[0021] Fig. 4 is a structural schematic diagram of an energy storage device according to some embodiments of the present application;

[0022] Fig. 5 is a sectional schematic diagram of the energy storage device shown in Fig. 4 (from one angle);

[0023] Fig. 6 is an enlarged schematic diagram of a portion of Fig. 5 at A;

[0024] Fig. 7 is a sectional schematic diagram of the energy storage device shown in Fig. 4 (from another angle);

[0025] Fig. 8 is an enlarged schematic diagram of a portion of Fig. 7 at B.

[0026] Explanation of reference numerals:

[0027] 10, liquid cooling plate assembly; 1, liquid cooling plate; 2, first joint part; 21, first connecting section; 22, first plug-in section; 3, second joint part; 31, second connecting section; 32, second plug-in section; 100, liquid cooling assembly; 20, liquid inlet pipeline; 203, liquid inlet branch pipeline; 204, liquid inlet main pipeline; 30, liquid return pipeline; 303, liquid return branch pipeline; 304, liquid return main pipeline; 40, first plug-in joint; 401, first plug-in pipe; 50, second plug-in joint; 501, second plug-in pipe; 1000, energy storage device; 300, housing; 3001, accommodating cavity; 3002, first through hole; 3003, second through hole. Embodiments of the present application

[0028] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, and the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, and the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the present embodiment, the terms "upper", "lower", "left", "right", "front", "back" and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used to distinguish in the description and have no special meaning.

[0031] With the development of technology, the battery pack inside the energy storage device is getting larger and larger, and the number of stacked battery packs is getting more and more, and on the road of commercial vehicles gradually changing to electric drive, three or even four layers of stacked battery packs have appeared. At present, the cooling of the stacked battery pack is usually connected through the interface of the bent pipe section and the liquid cooling plate extending along its thickness direction, and through this connection mode, the bending radius of the pipe between the adjacent two liquid cooling plates is large, which reduces the space configured to arrange the battery pack in the thickness direction of the liquid cooling plate, and reduces the energy density of the energy storage device.

[0032] In view of this, the present application provides a liquid cooling plate assembly, which can ensure that the space configured to arrange the battery pack in the thickness direction of the liquid cooling plate is sufficient, and avoid reducing the energy density of the energy storage device. The liquid cooling plate assembly will be described in detail below in combination with the main drawings.

[0033] Referring to FIG. 1, which is a structural schematic diagram of a liquid cooling plate assembly according to some embodiments of the present application. The liquid cooling plate assembly 10 includes a liquid cooling plate 1, a first joint part 2 and a second joint part 3. The liquid cooling plate 1 has an inlet and an outlet. The first joint part 2 is arranged on the liquid cooling plate 1 and is curved. The first joint part 2 includes a first connecting segment 21 and a first inserting segment 22 connected to each other. The first connecting segment 21 extends along the thickness direction of the liquid cooling plate 1. The end of the first connecting segment 21 away from the first inserting segment 22 is connected to the inlet. The first inserting segment 22 extends along the length or width direction of the liquid cooling plate 1. The second joint part 3 is arranged on the liquid cooling plate 1 and is curved. The second joint part 3 includes a second connecting segment 31 and a second inserting segment 32 connected to each other. The second connecting segment 31 extends along the thickness direction of the liquid cooling plate 1. The end of the second connecting segment 31 away from the second inserting segment 32 is connected to the outlet. The second inserting segment 32 extends along the length or width direction of the liquid cooling plate 1.

[0034] In some embodiments of the present application, the design of the inlet and the outlet ensures that the cooling liquid can enter and leave the liquid cooling plate 1 smoothly, thereby improving the heat exchange efficiency. The first connecting segment 21 extends along the thickness direction of the liquid cooling plate 1, so that the first connecting segment 21 is arranged perpendicular to the liquid cooling plate 1. As a result, due to the perpendicular connection, the occurrence of vortex and turbulence is reduced, and the energy loss of the fluid when entering the liquid cooling plate 1 is also reduced. This means that more energy is retained in the fluid to drive the flow of the fluid in the liquid cooling plate 1 and to exchange heat with the heat source, thereby improving the heat exchange efficiency. The first inserting segment 22 extends along the length or width direction of the liquid cooling plate 1, so that the first inserting segment 22 is parallel to the liquid cooling plate 1. As a result, the pipe can be connected to the first inserting segment 22 without bending, which is more convenient to operate and reduces the requirement for installation space, ensuring that there is enough space in the thickness direction of the liquid cooling plate to arrange the battery pack, thereby avoiding the reduction of the energy density of the energy storage device. The second connecting segment 31 extends along the thickness direction of the liquid cooling plate 1, so that the second connecting segment 31 is arranged perpendicular to the liquid cooling plate 1. As a result, due to the perpendicular connection, the occurrence of vortex and turbulence is reduced, and the energy loss of the fluid when entering the liquid cooling plate 1 is also reduced. This means that more energy is retained in the fluid to drive the flow of the fluid in the liquid cooling plate 1 and to exchange heat with the heat source, thereby improving the heat exchange efficiency. The second inserting segment 32 extends along the length or width direction of the liquid cooling plate 1, so that the second inserting segment 32 is parallel to the liquid cooling plate 1. As a result, the pipe can be connected to the second inserting segment 32 without bending, which is more convenient to operate and reduces the requirement for installation space, ensuring that there is enough space in the thickness direction of the liquid cooling plate to arrange the battery pack, thereby avoiding the reduction of the energy density of the energy storage device. In addition, when the liquid cooling plate 1 needs to be connected to the pipeline, the curved arrangement of the first joint part 2 and the second joint part 3 can also reduce the number of joints.

[0035] It should be noted that the first joint part 2 and the second joint part 3 are machined 90-degree water nozzles. In addition, the liquid cooling plate 1 comprises an extruded profile cooling plate. Of course, in other embodiments, the types of the first joint part 2, the second joint part 3 and the liquid cooling plate 1 are selected as needed, and the present application does not limit this.

[0036] Referring to FIG. 1, in some embodiments, the first connecting section 21 is welded and fixed to the liquid cooling plate 1 away from one end of the first plug-in section 22. In this way, the stability of the connection between the first connecting section 21 and the liquid cooling plate 1 can be ensured by welding and fixing, so as to avoid loosening of the first connecting section 21 due to vibration or other external forces. The welding and fixing of the first connecting section 21 away from one end of the first plug-in section 22 to the liquid cooling plate 1 can ensure better sealing connection effect between the first connecting section 21 and the liquid cooling plate 1, preventing leakage of the cooling liquid. Welding can achieve direct contact between metals, which helps to improve the heat conduction efficiency, so as to better transfer heat from the heat source to the cooling medium. The use of welding and fixing can reduce the use of additional fasteners during installation, thereby simplifying the assembly process. Reducing the use of fasteners can also reduce material costs and labor costs for assembly. Welding can increase the overall strength of the connection between the first connecting section 21 and the liquid cooling plate 1, making the entire liquid cooling plate assembly 10 more solid and durable.

[0037] It should be noted that in other embodiments, the first connecting section 21 can also be connected to the liquid cooling plate 1 away from one end of the first plug-in section 22 through a threaded structure, a threaded connection or a glue joint, for example. The present application does not limit the connection mode of the first connecting section 21 away from one end of the first plug-in section 22 to the liquid cooling plate 1.

[0038] In some embodiments, the second connecting section 31 is welded and fixed to the liquid cooling plate 1 away from one end of the second plug-in section 32. In this way, the stability of the connection between the second connecting section 31 and the liquid cooling plate 1 can be ensured by welding and fixing, so as to avoid loosening of the second connecting section 31 due to vibration or other external forces. The welding and fixing of the second connecting section 31 away from one end of the second plug-in section 32 to the liquid cooling plate 1 can ensure better sealing connection effect between the second connecting section 31 and the liquid cooling plate 1, preventing leakage of the cooling liquid. Welding can achieve direct contact between metals, which helps to improve the heat conduction efficiency, so as to better transfer heat from the heat source to the cooling medium. The use of welding and fixing can reduce the use of additional fasteners during installation, thereby simplifying the assembly process. Reducing the use of fasteners can also reduce material costs and labor costs for assembly. Welding can increase the overall strength of the connection between the second connecting section 31 and the liquid cooling plate 1, making the entire liquid cooling plate assembly 10 more solid and durable.

[0039] It should be noted that in other embodiments, the second connecting section 31 away from the second plug-in section 32 and the liquid cooling plate 1 can also be connected by a threaded structure, or glued, etc. Exemplarily, the application does not limit the connection mode of the second connecting section 31 away from the second plug-in section 32 and the liquid cooling plate 1.

[0040] In some embodiments, the length of the first plug-in section 22 is L1, wherein 25mm≤L1≤60mm. In this way, if the length of the first plug-in section 22 is too short, the connection may be unstable, and if the length of the first plug-in section 22 is too long, it may increase unnecessary weight and occupy too much space for installation. When the length of the first plug-in section 22 is within the range of 25mm to 60mm, the stability of the connection and the compactness of the structure can be balanced. If the first plug-in section 22 is too short, it may be difficult to process, and if the first plug-in section 22 is too long, it may increase the difficulty and cost of processing. Therefore, setting the length of the first plug-in section 22 within the range of 25mm to 60mm helps to ensure the feasibility of the manufacturing process. The length of the first plug-in section 22 within the range of 25mm to 60mm can control the cost on the premise of ensuring the functionality of the first plug-in section 22. The length of the first plug-in section 22 within the range of 25mm to 60mm saves the space in the length or width direction of the liquid cooling plate 1, which is convenient for arrangement in limited space.

[0041] It should be noted that the length of the first plug-in section 22 can be 25mm, 26mm, 28mm, 30mm, 33mm, 35mm, 38mm, 40mm, 43mm, 45mm, 48mm, 50mm, 54mm, 55mm, 58mm, or 60mm. Exemplarily, the length of the first plug-in section 22 can be selected as needed, and the application does not limit it.

[0042] In some embodiments, the length of the second plug-in section 32 is L2, wherein 25mm≤L2≤60mm. In this way, if the length of the second plug-in section 32 is too short, the connection may be unstable, and if the length of the second plug-in section 32 is too long, it may increase unnecessary weight and occupy too much space for installation. When the length of the second plug-in section 32 is within the range of 25mm to 60mm, the stability of the connection and the compactness of the structure can be balanced. If the second plug-in section 32 is too short, it may be difficult to process, and if the second plug-in section 32 is too long, it may increase the difficulty and cost of processing. Therefore, setting the length of the second plug-in section 32 within the range of 25mm to 60mm helps to ensure the feasibility of the manufacturing process. The length of the second plug-in section 32 within the range of 25mm to 60mm can control the cost on the premise of ensuring the functionality of the second plug-in section 32. The length of the second plug-in section 32 within the range of 25mm to 60mm saves the space in the length or width direction of the liquid cooling plate 1, which is convenient for arrangement in limited space.

[0043] It should be noted that the length of the second plug-in section 32 can be 25 mm, 26 mm, 28 mm, 30 mm, 33 mm, 35 mm, 38 mm, 40 mm, 43 mm, 45 mm, 48 mm, 50 mm, 54 mm, 55 mm, 58 mm, or 60 mm. Exemplarily, the length of the second plug-in section 32 can be selected as needed, which is not limited in the present application.

[0044] In some embodiments, the length of the first connecting section 21 is L3, where 35 mm≤L3≤60 mm. In this way, the length of the first connecting section 21 is in the range of 35 mm to 60 mm, which can reduce the resistance of the fluid during flow, which helps to improve the flow efficiency of the cooling liquid and reduce energy loss. The length of the first connecting section 21 in the range of 35 mm to 60 mm makes the first connecting section 21 more solid and durable, so that the first connecting section 21 can withstand various stresses and vibrations during work. This helps to improve the reliability and durability of the liquid cooling plate assembly 10. The length of the first connecting section 21 in the range of 35 mm to 60 mm can reduce the risk of fluid resistance and leakage while providing sufficient connection strength. In addition, the length of the first connecting section 21 in the range of 35 mm to 60 mm can also reduce the use of materials and save costs while ensuring the connection strength of the first connecting section 21. In addition, the length of the first connecting section 21 in the range of 35 mm to 60 mm makes the replacement of the first connecting section 21 more simple and fast.

[0045] It should be noted that if the length of the first connecting section 21 is too short, it may not provide sufficient connection strength, and a too long first connecting section 21 may increase the risk of fluid resistance and leakage. At the same time, it will also increase the production cost. Therefore, it is helpful to reduce these potential risks.

[0046] Exemplarily, the length of the first connecting section 21 can be 35 mm, 38 mm, 40 mm, 43 mm, 45 mm, 48 mm, 50 mm, 54 mm, 55 mm, 58 mm, or 60 mm. Exemplarily, the length of the first connecting section 21 can be selected as needed, which is not limited in the present application.

[0047] In some embodiments, the length of the second connecting section 31 is L4, where 35mm≤L4≤60mm. The length of the second connecting section 31 in the range of 35mm to 60mm can reduce the resistance of the fluid during the flow, which helps to improve the flow efficiency of the cooling liquid and reduce the energy loss. The length of the second connecting section 31 in the range of 35mm to 60mm makes the second connecting section 31 more solid and durable, so that the second connecting section 31 can withstand various stresses and vibrations during work. This helps to improve the reliability and durability of the liquid cooling plate assembly 10. The length of the second connecting section 31 in the range of 35mm to 60mm can reduce the fluid resistance and the risk of leakage while providing sufficient connection strength. In addition, the length of the second connecting section 31 in the range of 35mm to 60mm can also reduce the use of materials and save costs while ensuring the connection strength of the second connecting section 31. In addition, the length of the second connecting section 31 in the range of 35mm to 60mm makes the replacement of the second connecting section 31 more simple and fast.

[0048] It should be noted that if the length of the second connecting section 31 is too short, it may not provide sufficient connection strength, and if the second connecting section 31 is too long, it may increase the risk of fluid resistance and leakage. At the same time, it will also increase the production cost. Therefore, it is helpful to reduce these potential risks.

[0049] Exemplarily, the length of the second connecting section 31 can be 35mm, 38mm, 40mm, 43mm, 45mm, 48mm, 50mm, 54mm, 55mm, 58mm, or 60mm. Exemplarily, the length of the second connecting section 31 can be selected as needed, which is not limited in the present application.

[0050] Referring to FIG. 2 and FIG. 3, FIG. 2 is a structural schematic diagram of a liquid cooling assembly according to some embodiments of the present application, and FIG. 3 is a perspective schematic diagram of the liquid cooling assembly shown in FIG. 2. Some embodiments of the present application also propose a liquid cooling assembly 100, which includes a plurality of liquid cooling plate assemblies 10, a liquid inlet pipeline 20, and a liquid return pipeline 30. The plurality of liquid cooling plate assemblies 10 are arranged along the thickness direction of the liquid cooling plate 1. The liquid inlet pipeline 20 has a first delivery inlet and a plurality of first delivery outlets. The first delivery inlet is arranged to be in communication with the liquid cooling system. The plurality of first delivery outlets are in communication with a plurality of first plug-in sections 22. The liquid return pipeline 30 has a second liquid return inlet and a plurality of second liquid return outlets. The second liquid return inlet is arranged to be in communication with the liquid cooling system. The plurality of second liquid return outlets are in communication with a plurality of second plug-in sections 32.

[0051] In some embodiments of the present application, the arrangement of multiple liquid cooling plate assemblies 10 allows for greater surface area contact with the cooling liquid, thereby increasing heat exchange efficiency. By using multiple liquid cooling plate assemblies 10, cooling capacity can be easily increased or decreased as needed to accommodate different power density devices or modules, providing a better thermal management solution. The spaced arrangement of multiple liquid cooling plate assemblies 10 helps ensure uniform distribution of the cooling liquid, resulting in more uniform temperature control. The inlet pipe 20 has multiple first delivery outlets that communicate with the first plug-in sections 22 of the multiple liquid cooling plate assemblies 10, allowing the cooling liquid to be evenly and quickly distributed to each liquid cooling plate assembly 10. This multi-point delivery method ensures that the cooling liquid can fully cover and effectively absorb the heat generated by the heat source. The return pipe 30 is responsible for collecting the cooling liquid that has absorbed heat and sending it back to the liquid cooling system for cooling treatment, forming a closed-loop cooling cycle. This design improves cooling efficiency and ensures the continuous and stable operation of the system. The multiple liquid cooling plate assemblies 10 are spaced along the thickness direction of the liquid cooling plate 1, so that when a liquid cooling plate assembly 10 fails, it can be replaced individually without affecting the operation of the entire liquid cooling assembly 100. By spacing multiple liquid cooling plate assemblies 10 along the thickness direction of the liquid cooling plate 1 and arranging the inlet pipe 20 and the return pipe 30, the inlet pipe 20 and the return pipe 30 can be connected to the first plug-in section 22 and the second plug-in section 32 without bending, making the operation more convenient and reducing the requirement for installation space, ensuring that the space in the thickness direction of the liquid cooling plate configured to arrange the battery pack is sufficient, avoiding the reduction of energy density of the energy storage device. In addition, this design can also make the structure of the entire liquid cooling assembly 100 more compact. This compact structure design helps to save space, making the liquid cooling assembly 100 better adapt to various installation environments and space limitations. The inlet pipe 20 and the return pipe 30 adopt a multi-point connection method, respectively corresponding to the first plug-in section 22 and the second plug-in section 32 of the liquid cooling plate assembly 10. This connection method helps to reduce the risk of leakage, as even if a connection point leaks, the entire system can still operate normally.

[0052] Referring to FIG. 3, in some embodiments, the liquid inlet pipeline 20 includes a plurality of liquid inlet branch pipelines 203 and a liquid inlet main pipeline 204. The liquid inlet branch pipeline 203 is arranged between two adjacent liquid cooling plate assemblies 10. In this way, the cooling liquid can be evenly distributed to each liquid cooling plate assembly 10, avoiding local overheating caused by uneven distribution of cooling liquid. Even distribution of cooling liquid enables each liquid cooling plate assembly 10 to effectively absorb and dissipate heat, improving the heat dissipation efficiency of the entire liquid cooling assembly 100. In addition, the liquid inlet branch pipeline 203 is directly arranged between two adjacent liquid cooling plate assemblies 10, which can reduce the redundancy and complexity of the liquid inlet branch pipeline 203, making the layout of the entire liquid cooling assembly 100 more compact. This compact structure design helps to save space and improve the integration and aesthetics of the liquid cooling assembly 100. The two ends of each liquid inlet branch pipeline 203 are respectively connected to the first plug-in section 22 of two adjacent liquid cooling plate assemblies 10, and each liquid inlet branch pipeline 203 is formed with a first delivery outlet. In this way, the installation operation of the liquid inlet branch pipeline 203 is simple. In addition, the two ends of the liquid inlet branch pipeline 203 are directly connected to the first plug-in section 22 of two adjacent liquid cooling plate assemblies 10, which reduces the flow resistance of the cooling liquid in the pipeline, so that the cooling liquid can reach and flow through each liquid cooling plate assembly 10 more quickly. The two adjacent liquid inlet branch pipelines 203 are connected to each other, which reduces the complexity of the liquid inlet pipeline 20, and also helps to optimize the fluid dynamics characteristics, reduce pressure loss, and ensure smooth flow of the cooling liquid. One end of the liquid inlet main pipeline 204 is formed with a first delivery inlet, and the other end of the liquid inlet main pipeline 204 is connected to one of the plurality of liquid inlet branch pipelines 203. In this way, the cooling liquid delivered from the liquid inlet main pipeline 204 can be evenly delivered to the plurality of liquid inlet branch pipelines 203, ensuring uniform distribution of cooling liquid flow, control of pressure drop, and control of temperature difference.

[0053] Referring to FIGS. 2 and 3, in some embodiments, the first plug-in section 22 of each liquid cooling plate assembly 10 is plug-in matched with a first plug-in connector 40, the first plug-in connector 40 has at least two first plug-in pipes 401, one of the at least two first plug-in pipes 401 is plug-in matched with the first delivery outlet of the corresponding liquid inlet branch pipe 203, and the other of the at least two first plug-in pipes 401 is plug-in matched with the other end of the liquid inlet branch pipe 203 and / or the liquid inlet main pipe 204 of another liquid cooling plate assembly 10. In this way, through the design of the first plug-in connector 40, the plug-in matching between the liquid cooling plate assembly 10, the liquid inlet branch pipe 203 and the liquid inlet main pipe 204 makes the installation process of the liquid cooling assembly 100 more convenient and fast, reduces the complexity of the process, the installation time and the labor cost. In addition, because plug-in matching usually has better sealing performance and can be quickly replaced or repaired without damaging other parts of the system. The plug-in matching mode makes the layout of the liquid cooling assembly 100 more compact, reduces unnecessary pipes and connectors, and improves the integration and aesthetics of the liquid cooling assembly 100. When it is necessary to increase or reduce the liquid cooling plate assembly 10, it can be realized by replacing or adjusting the first plug-in connector 40 and the corresponding plug-in pipe, which greatly reduces the difficulty and cost of upgrading.

[0054] Continuing to refer to FIGS. 2 and 3, in some embodiments, the liquid return pipe 30 includes a plurality of liquid return branch pipes 303 and a liquid return main pipe 304, the liquid return branch pipe 303 is arranged between two adjacent liquid cooling plate assemblies 10, and the two ends of each liquid return branch pipe 303 are respectively connected to the second plug-in section 32 of the two adjacent liquid cooling plate assemblies 10. In this way, this direct connection mode reduces the flow resistance of the cooling liquid during the return process, so that the cooling liquid can flow back to the cooling system more quickly. Since the liquid return branch pipe 303 is directly arranged between two adjacent liquid cooling plate assemblies 10 and is connected to each other, the layout of the entire liquid return pipe 30 is more compact. This compact layout helps to save space and improve the integration of the system. Compared with the design of arranging the liquid return pipe 30 separately for each liquid cooling plate assembly 10, this design of the liquid return branch pipe 303 connected to each other reduces the number of pipes and the complexity and cost of the liquid cooling assembly 100. The two adjacent liquid return branch pipes 303 are connected to each other, and each liquid return branch pipe 303 forms a second liquid return outlet. In this way, the plurality of liquid return branch pipes 303 collectively form a continuous cooling liquid return path. This design ensures that the cooling liquid can circulate smoothly between the liquid cooling plate assemblies 10, avoiding local accumulation or blockage. One end of the liquid return main pipe 304 forms a second liquid return inlet, and the other end of the liquid return main pipe 304 is connected to one of the plurality of liquid return branch pipes 303. In this way, this design ensures that the cooling liquid can be evenly returned between the liquid cooling plate assemblies 10, avoiding performance degradation or failure due to poor local return.

[0055] Referring to FIG. 3, in some embodiments, the second plug-in section 32 of each liquid cooling plate assembly 10 is plug-in matched with a second plug-in connector 50, the second plug-in connector 50 has at least two second plug-in pipes 501, one of the at least two second plug-in pipes 501 is plug-in matched with the second liquid return outlet of the corresponding liquid return branch pipeline 303, and the other of the at least two second plug-in pipes 501 is plug-in matched with the other end of the liquid return branch pipeline 303 and / or the liquid return main pipeline 304 of another liquid cooling plate assembly 10. In this way, through the design of the second plug-in connector 50, the plug-in matching between the liquid cooling plate assembly 10, the liquid return branch pipeline 303 and the liquid return main pipeline 304 makes the installation process of the liquid cooling assembly 100 more convenient and fast, reduces the complexity of the process, the installation time and the labor cost. In addition, because the plug-in matching usually has better sealing performance, and can be quickly replaced or repaired without damaging other parts of the system. The plug-in matching mode makes the layout of the liquid cooling assembly 100 more compact, reduces unnecessary pipelines and connectors, improves the integration and aesthetics of the liquid cooling assembly 100. When it is necessary to increase or reduce the liquid cooling plate assembly 10, it can be realized only by replacing or adjusting the second plug-in connector 50 and the corresponding plug-in pipe, which greatly reduces the difficulty and cost of upgrading.

[0056] Referring to FIG. 4, FIG. 5 and FIG. 7, FIG. 4 is a structural schematic diagram of an energy storage device provided by some embodiments of the present application, FIG. 5 is a cross-sectional schematic diagram of the energy storage device (an angle) shown in FIG. 4, and FIG. 7 is a cross-sectional schematic diagram of the energy storage device (another angle) shown in FIG. 4. Some embodiments of the present application also propose an energy storage device 1000, the energy storage device 1000 includes a liquid cooling assembly 100 and a plurality of battery packs, and each of the two adjacent liquid cooling plate assemblies 10 is installed with a battery pack.

[0057] In some embodiments of the present application, the liquid cooling assembly 100 is arranged by spacing multiple liquid cooling plate assemblies 10 along the thickness direction of the liquid cooling plate 1, and the inlet pipe 20 and the return pipe 30 are arranged in a layout such that the inlet pipe 20 and the return pipe 30 can be connected with the first plug-in section 22 and the second plug-in section 32 without bending, which is more convenient to operate and reduces the requirement for installation space, ensuring that the space in the thickness direction of the liquid cooling plate is sufficient to arrange the battery pack, avoiding the reduction of the energy density of the energy storage device. In addition, the liquid cooling assembly 100 can effectively absorb and remove the heat generated by the battery pack during operation through the circulation of the liquid cooling plate assemblies 10 and the cooling liquid inside it. This heat dissipation method is more efficient than the traditional air cooling method, which can significantly reduce the temperature of the battery pack and improve the safety and stability of the energy storage system. The design of installing battery packs between adjacent two liquid cooling plate assemblies 10 ensures that each battery pack can be fully cooled. Due to the uniform distribution of the liquid cooling plate assemblies 10, the cooling liquid can uniformly flow through each battery pack during circulation, avoiding the occurrence of local overheating, thereby improving the uniformity of heat dissipation. An efficient heat dissipation system helps to maintain the battery pack operating within an appropriate temperature range, which can significantly extend the service life of the battery. Batteries working in high temperature environments will accelerate the aging process, while the application of liquid cooling systems can effectively reduce the working temperature of the battery, thereby slowing down the aging speed. At an appropriate working temperature, the energy conversion efficiency of the battery will be higher. The liquid cooling system helps to improve the overall energy conversion efficiency of the energy storage system by keeping the battery pack operating within the optimal temperature range, thereby increasing the output power and energy storage capacity of the system. Battery packs are prone to thermal runaway in high temperature environments, leading to safety accidents such as fire or explosion. The application of the liquid cooling system can significantly reduce the working temperature of the battery pack, thereby reducing the risk of thermal runaway and improving the safety of the energy storage system. The design of installing battery packs between adjacent two liquid cooling plate assemblies 10 makes the space layout of the energy storage device 1000 more compact. This layout not only improves the space utilization rate, but also helps to reduce the floor area and weight of the device, thereby reducing transportation and installation costs.

[0058] Referring to FIGS. 5 and 7, in some embodiments, the energy storage device 1000 further comprises a housing 300, which is formed with a receiving cavity 3001, and the plurality of battery packs and the plurality of liquid cooling plate assemblies 10 are all installed in the receiving cavity 3001. In this way, the housing 300 can provide physical protection for the plurality of battery packs and the plurality of liquid cooling plate assemblies 10, preventing external environmental factors (such as dust, moisture, mechanical impact, etc.) from causing damage to the plurality of battery packs and the plurality of liquid cooling plate assemblies 10. The housing 300 is provided with a plurality of first through holes 3002, which are all in communication with the receiving cavity 3001. One part of the liquid inlet pipeline 20 is located outside the housing 300, and the other part of the liquid inlet pipeline 20 is adapted to pass through the plurality of first through holes 3002 and be connected with the plurality of first plug-in sections 22. This design makes the internal structure of the energy storage device 1000 more compact. It effectively utilizes the space of the housing 300, reduces the occupied space of the pipeline in the housing 300, and thus improves the space utilization and energy density of the overall device. The first through holes 3002 provide convenience for the installation of the liquid inlet pipeline 20. During the installation process, only the corresponding part of the liquid inlet pipeline 20 needs to be passed through the through holes and connected with the first plug-in section 22 of the liquid cooling plate assembly 10. This design reduces the installation steps and difficulty, and improves the installation efficiency. When it is necessary to maintain the liquid inlet pipeline 20 or the liquid cooling plate assembly 10, the design of the first through holes 3002 also provides convenience. Through the first through holes 3002, the operator can easily disconnect the pipeline connection, check, repair or replace the internal components of the housing 300, without the need to disassemble the entire energy storage device 1000. The design of the first through holes 3002 ensures that the cooling liquid can smoothly flow into each liquid cooling plate assembly 10. When the cooling liquid flows in the liquid cooling plate assembly 10, it can absorb and carry away the heat generated by the battery pack, thereby achieving effective heat dissipation. This design helps to maintain the battery pack operating within the appropriate temperature range, improving the overall performance of the energy storage device 1000.

[0059] Referring to FIG. 4, in some embodiments, the shell 300 is provided with a plurality of second through-holes 3003, each of which is in communication with the accommodation cavity 3001. A portion of the return liquid pipeline 30 is outside the shell 300, and another portion of the return liquid pipeline 30 is adapted to pass through the plurality of second through-holes 3003 and be connected to the plurality of second plug-in sections 32. In this way, through the second through-holes 3003, the return liquid pipeline 30 can smoothly guide the cooling liquid that has absorbed heat out of the liquid cooling plate assembly 10 and back to the cooling system for further cooling. This design ensures the continuous circulation of the cooling liquid and improves the heat dissipation efficiency. Since the return liquid pipeline 30 can pass through the plurality of second through-holes 3003 and be connected to the plurality of liquid cooling plate assemblies 10, it can ensure that each liquid cooling plate assembly 10 can be cooled in time. This helps to achieve uniform heat dissipation of the battery pack and prevent local overheating. By setting the connection point of the return liquid pipeline 30 at the second through-holes 3003 of the shell 300, the length of the return liquid pipeline 30 inside the shell 300 can be reduced, and the space occupied by the pipeline inside the shell 300 can be reduced, thereby effectively utilizing the space of the shell 300 and improving the space utilization and energy density of the overall device. In addition, when installing or maintaining the return liquid pipeline 30, the operator only needs to operate through the second through-holes 3003 without disassembling the entire shell 300. This greatly improves the convenience of installation and maintenance and reduces the operation difficulty and cost.

[0060] Referring to FIG. 6 and FIG. 8, FIG. 6 is a partial enlarged view of A in FIG. 5, and FIG. 8 is a partial enlarged view of B in FIG. 7. In some embodiments, the first plug-in section 22 is inside the accommodation cavity 3001, and a first clearance is provided between the other end of the first plug-in section 22 and the inner side wall of the shell 300. In this way, the presence of the first clearance can prevent mechanical interference between the first plug-in section 22 and the inner side wall of the shell 300, especially in the case of device vibration or thermal expansion, which can avoid damage to the first plug-in section 22. By providing the first clearance, the risk of damage to the first plug-in section 22 due to mechanical stress can be reduced, thereby improving the reliability of the entire system. The liquid cooling plate assembly 10 generates heat during operation, causing the first plug-in section 22 to thermally expand. The first clearance provides space for such expansion, preventing deformation or damage caused by thermal expansion. The presence of the first clearance makes it easier for maintenance personnel to access the first plug-in section 22, simplifying the installation and maintenance process. If there is not enough gap between the first plug-in section 22 and the shell 300, prolonged operation may result in poor sealing due to wear. The first clearance helps to maintain a good sealing state and reduce the likelihood of leakage. When the first plug-in section 22 needs to be replaced or inspected, the presence of the first clearance can reduce the complexity of the operation and improve maintenance efficiency.

[0061] With reference to FIGS. 6 and 8, in some embodiments, the second plug-in section 32 is located in the accommodation cavity 3001, and a second clearance is provided between the other end of the second plug-in section 32 and the inner side wall of the shell 300. The presence of the second clearance can prevent mechanical interference between the second plug-in section 32 and the inner side wall of the shell 300, and can avoid damage to the second plug-in section 32, especially in the case of device vibration or thermal expansion. By providing the second clearance, the risk of damage to the second plug-in section 32 due to mechanical stress can be reduced, thereby improving the reliability of the entire system. The liquid cooling plate assembly 10 generates heat during operation, causing the second plug-in section 32 to expand. The second clearance provides space for such expansion, preventing deformation or damage due to thermal expansion. The presence of the second clearance makes it easier for maintenance personnel to access the second plug-in section 32, simplifying the installation and maintenance process. If there is not enough clearance between the second plug-in section 32 and the shell 300, prolonged operation can cause wear and tear, leading to poor sealing. The second clearance helps maintain a good sealing state and reduces the likelihood of leakage. When the second plug-in section 32 needs to be replaced or inspected, the presence of the second clearance can reduce the complexity of the operation and improve maintenance efficiency.

[0062] Some embodiments of the present application also propose a vehicle comprising the energy storage device 1000. The specific structure of the energy storage device 1000 is described in some embodiments. Since the vehicle adopts all the technical solutions of some embodiments, it at least has all the beneficial effects brought by the technical solutions of some embodiments, which will not be repeated here.

Claims

1. A liquid cooling plate assembly (10), comprising: a liquid cooling plate (1) having an inlet and an outlet; a first joint portion (2) disposed on the liquid cooling plate (1) and arranged in a bent manner, the first joint portion (2) comprising a first connecting segment (21) and a first plug-in segment (22) connected to each other, the first connecting segment (21) extending along a thickness direction of the liquid cooling plate (1), and an end of the first connecting segment (21) away from the first plug-in segment (22) being in communication with the inlet, the first plug-in segment (22) extending along a length or width direction of the liquid cooling plate (1); a second joint portion (3) disposed on the liquid cooling plate (1) and arranged in a bent manner, the second joint portion (3) comprising a second connecting segment (31) and a second plug-in segment (32) connected to each other, the second connecting segment (31) extending along a thickness direction of the liquid cooling plate (1), and an end of the second connecting segment (31) away from the second plug-in segment (32) being in communication with the outlet, the second plug-in segment (32) extending along a length or width direction of the liquid cooling plate (1).

2. The liquid cold plate assembly (10) of claim 1, wherein, the end of the first connecting segment (21) away from the first plug-in segment (22) is welded and fixed to the liquid cooling plate (1); and / or the end of the second connecting segment (31) away from the second plug-in segment (32) is welded and fixed to the liquid cooling plate (1).

3. The liquid cold plate assembly (10) of claim 1 or 2, wherein, a length of the first plug-in segment (22) is L1, wherein 25mm≤L1≤60mm; and / or a length of the second plug-in segment (32) is L2, wherein 25mm≤L2≤60mm.

4. The liquid cold plate assembly (10) of any one of claims 1-3, wherein, a length of the first connecting segment (21) is L3, wherein 35mm≤L3≤60mm; and / or a length of the second connecting segment (31) is L4, wherein 35mm≤L4≤60mm.

5. A liquid cooling assembly (100), comprising: a plurality of liquid cooling plate assemblies (10) according to any one of claims 1 to 4, the plurality of liquid cooling plate assemblies (10) being arranged at intervals along a thickness direction of the liquid cooling plate (1); an inlet pipeline (20) having a first delivery inlet and a plurality of first delivery outlets, the first delivery inlet being arranged in communication with a liquid cooling system, and the plurality of first delivery outlets being in communication with the plurality of first plug-in segments (22); an outlet pipeline (30) having a second return inlet and a plurality of second return outlets, the second return inlet being arranged in communication with the liquid cooling system, and the plurality of second return outlets being in communication with the plurality of second plug-in segments (32).

6. The liquid cooling assembly (100) of claim 5, wherein, the inlet pipeline (20) comprises: a plurality of inlet branch pipelines (203), each of the inlet branch pipelines (203) being arranged between two adjacent liquid cooling plate assemblies (10), and both ends of each of the inlet branch pipelines (203) being in communication with the first plug-in segments (22) of the two adjacent liquid cooling plate assemblies (10), and adjacent inlet branch pipelines (203) being in communication with each other, and each of the inlet branch pipelines (203) forming the first delivery outlet; A liquid inlet main pipe (204) has one end forming the first delivery inlet and the other end communicating with one of the liquid inlet branch pipes (203).

7. The liquid cooling assembly (100) of claim 6, wherein, The first plug-in section (22) of each liquid cooling plate assembly (10) is plugged with a first plug-in connector (40) having at least two first plug-in pipes (401), one of which is plugged with the first delivery outlet of the corresponding liquid inlet branch pipe (203), and the other of which is plugged with the liquid inlet branch pipe (203) and / or the other end of the liquid inlet main pipe (204) of another liquid cooling plate assembly (10).

8. The liquid cooling assembly (100) according to any one of claims 5 to 7, wherein, The liquid return pipe (30) comprises: A plurality of liquid return branch pipes (303) are arranged between adjacent two liquid cooling plate assemblies (10), both ends of each liquid return branch pipe (303) respectively communicate with the second plug-in section (32) of adjacent two liquid cooling plate assemblies (10), adjacent two liquid return branch pipes (303) communicate with each other, and each liquid return branch pipe (303) forms the second liquid return outlet. A liquid return main pipe (304) has one end forming the second liquid return inlet and the other end communicating with one of the liquid return branch pipes (303).

9. The liquid cooling assembly (100) of claim 8, wherein, The second plug-in section (32) of each liquid cooling plate assembly (10) is plugged with a second plug-in connector (50) having at least two second plug-in pipes (501), one of which is plugged with the second liquid return outlet of the corresponding liquid return branch pipe (303), and the other of which is plugged with the liquid return branch pipe (303) and / or the other end of the liquid return main pipe (304) of another liquid cooling plate assembly (10).

10. An energy storage device (1000) comprising: The liquid cooling assembly (100) according to any one of claims 5 to 9; A plurality of battery packs are arranged between adjacent two liquid cooling plate assemblies (10).

11. The energy storage device (1000) according to claim 10, further comprising a housing (300) formed with a receiving cavity (3001), a plurality of battery packs and a plurality of liquid cooling plate assemblies (10) are arranged in the receiving cavity (3001), and the housing (300) is provided with a plurality of first through holes (3002) communicating with the receiving cavity (3001). Part of the liquid inlet pipe (20) is outside the housing (300), and the other part of the liquid inlet pipe (20) is adapted to pass through a plurality of first through holes (3002) and be connected with a plurality of first plug-in sections (22).

12. The energy storage device (1000) according to claim 11, wherein, The shell (300) is provided with a plurality of second through holes (3003), and the plurality of second through holes (3003) are in communication with the accommodating cavity (3001); A part of the liquid return pipeline (30) is located outside the shell (300), and another part of the liquid return pipeline (30) is adapted to pass through the plurality of second through holes (3003) and be connected with the plurality of second plug-in sections (32).

13. The energy storage device (1000) according to claim 11 or 12, wherein The first plug-in section (22) is located in the accommodating cavity (3001), and a first avoiding gap is arranged between the other end of the first plug-in section (22) and the inner side wall of the shell (300); and / or, The second plug-in section (32) is located in the accommodating cavity (3001), and a second avoiding gap is arranged between the other end of the second plug-in section (32) and the inner side wall of the shell (300).

14. A vehicle comprising the energy storage device (1000) according to any one of claims 10 to 13.

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