Heat dissipation structure of energy storage structure

Abstract

The utility model discloses a heat dissipation structure of an energy storage structure. The energy storage structure comprises at least one battery cell cluster, and the battery cell cluster comprises a plurality of battery cells arranged in the first direction; the heat dissipation structure comprises at least one heat dissipation sub-structure, and the heat dissipation sub-structures are in one-to-one correspondence with the battery cell clusters; each heat dissipation sub-structure comprises a liquid inlet, a liquid outlet and a liquid cooling pipeline; the liquid cooling pipeline is respectively communicated with the liquid inlet and the liquid outlet; the liquid cooling pipeline comprises at least one first liquid cooling branch and at least one second liquid cooling branch, the first liquid cooling branch surrounds the plurality of battery cells and is continuously arranged in a snakelike manner, and the second liquid cooling branch surrounds the plurality of battery cells and is continuously arranged in a snakelike manner; moreover, the flowing direction of the liquid cooling medium in the first liquid cooling branch is opposite to the flowing direction of the liquid cooling medium in the second liquid cooling branch at the maximum surface of any battery cell; the plane where the largest surface is located intersects with the first direction. According to the technical scheme, the liquid cooling medium can fully flow on the surface of the battery cell for heat dissipation, and the heat dissipation efficiency of the heat dissipation structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage systems, and in particular to a heat dissipation structure for an energy storage structure. Background Technology

[0002] Traditional liquid-cooled energy storage systems, due to space constraints, typically place the liquid cooling plate at the bottom of the battery cell cluster, resulting in significant temperature differences between the top and bottom of each individual cell cluster. Furthermore, the limited contact area between the liquid cooling plate and the cell cluster leads to lower temperatures near the inlet and higher temperatures near the outlet. This makes it difficult to achieve proper temperature uniformity, thus reducing the lifespan of the battery cell cluster. Utility Model Content

[0003] This invention provides a heat dissipation structure for an energy storage structure to solve the problem of low heat dissipation efficiency caused by the small contact surface between the liquid cooling plate and the battery cell cluster in the prior art.

[0004] This utility model provides a heat dissipation structure for an energy storage structure, wherein the energy storage structure includes at least one battery cell cluster, and the battery cell cluster includes multiple battery cells arranged along a first direction.

[0005] The heat dissipation structure includes at least one sub-heat dissipation structure, which corresponds one-to-one with the battery cell cluster. The sub-heat dissipation structure includes a liquid inlet, a liquid outlet, and liquid cooling pipes. The liquid cooling pipes are connected to the liquid inlet and the liquid outlet, respectively.

[0006] The liquid cooling pipeline includes at least one first liquid cooling branch and at least one second liquid cooling branch. The first liquid cooling branch is arranged continuously in a serpentine pattern around multiple battery cells, and the second liquid cooling branch is arranged continuously in a serpentine pattern around multiple battery cells. Furthermore, at the maximum surface of any battery cell, the flow direction of the liquid cooling medium in the first liquid cooling branch is opposite to the flow direction of the liquid cooling medium in the second liquid cooling branch. The plane containing the maximum surface intersects with the first direction.

[0007] Optionally, the battery cell includes a first maximum surface, a second maximum surface, a first side surface, and a second side surface. The first maximum surface and the second maximum surface are disposed opposite to each other along a first direction. The first side surface is connected to the first maximum surface and the second maximum surface. The second side surface is connected to the first maximum surface and the second maximum surface. The first side surface and the second side surface are disposed opposite to each other along a second direction. The second direction is the flow direction of the liquid cooling medium on the maximum surface.

[0008] Two adjacent battery cells arranged along the first direction include a first battery cell and a second battery cell;

[0009] The first liquid cooling branch surrounds the first maximum surface, the first side surface, and the second maximum surface of the first battery cell, and surrounds the first maximum surface, the second side surface, and the second maximum surface of the second battery cell;

[0010] The second liquid-cooled branch surrounds the first maximum surface, the second side surface, and the second maximum surface of the first battery cell, and surrounds the first maximum surface, the first side surface, and the second maximum surface of the second battery cell.

[0011] Optionally, the battery cell includes a first maximum surface and a second maximum surface;

[0012] In the same cell cluster, the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on the first maximum surface of the first cell in the cell cluster is smaller than the area of ​​the first maximum surface of the first cell; the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on the second maximum surface of the last cell in the cell cluster is smaller than the area of ​​the second maximum surface of the last cell; and the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on other maximum surfaces in the cell cluster is equal to the area of ​​the maximum surface.

[0013] Optionally, in the same cell cluster, the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on the first maximum surface of the first cell in the cell cluster is equal to half the area of ​​the first maximum surface of the first cell.

[0014] The coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on the second largest surface of the last cell in the cell cluster is equal to half the area of ​​the second largest surface of the last cell.

[0015] Optionally, the first liquid cooling branch includes at least two first liquid cooling sub-branches, and / or the second liquid cooling branch includes at least two second liquid cooling sub-branches;

[0016] On the maximum surface of any cell, the first liquid-cooled sub-branch and the second liquid-cooled sub-branch are arranged alternately in a third direction; the third direction is parallel to the plane where the maximum surface is located and intersects with the flow direction of the liquid cooling medium on the maximum surface.

[0017] Optionally, for the same cell cluster, the liquid inlet is located at the center of the largest surface of the first cell in the cell cluster;

[0018] The liquid outlet is located at the center of the largest surface of the last cell in the cell cluster.

[0019] Optionally, the energy storage structure includes at least two battery cell clusters, and the heat dissipation structure includes at least two sub-heat dissipation structures. The at least two battery cell clusters are arranged along a second direction, and the at least two sub-heat dissipation structures are arranged along a second direction, which is the flow direction of the liquid cooling medium on the maximum surface.

[0020] There are two sub-heat dissipation structures arranged adjacent to each other along the second direction, with the liquid inlet of one sub-heat dissipation structure connected to the liquid outlet of the other sub-heat dissipation structure.

[0021] Optionally, the energy storage structure includes at least four battery cell clusters, and the heat dissipation structure includes at least four sub-heat dissipation structures;

[0022] The four sub-heat dissipation structures arranged arbitrarily adjacent to each other along the second direction include a first sub-heat dissipation structure, a second sub-heat dissipation structure, a third sub-heat dissipation structure, and a fourth sub-heat dissipation structure arranged sequentially along the second direction;

[0023] The liquid inlet of the second sub-heating structure is connected to the liquid inlet of the third sub-heating structure, the liquid outlet of the second sub-heating structure is connected to the liquid inlet of the first sub-heating structure, and the liquid outlet of the third sub-heating structure is connected to the liquid inlet of the fourth sub-heating structure.

[0024] Optionally, the energy storage structure includes at least two battery cell clusters, and the heat dissipation structure includes at least two sub-heat dissipation structures. The at least two battery cell clusters are arranged along a second direction, and the at least two sub-heat dissipation structures are arranged along a second direction, which is the flow direction of the liquid cooling medium on the maximum surface.

[0025] The bend between the first liquid cooling branch and the second liquid cooling branch includes a chamfered structure;

[0026] Furthermore, the chamfer angles of adjacent chamfer structures along the second direction are the same.

[0027] Optionally, the heat dissipation structure may also include thermally conductive adhesive disposed between the sub-heat dissipation structure and the battery cell cluster;

[0028] The battery cell clusters are bonded to the sub-heat dissipation structure using thermally conductive adhesive.

[0029] The technical solution of this utility model enhances the fluidity of the liquid cooling medium and the contact area between the liquid cooling medium and the surface of the battery cell by providing at least two liquid cooling branches with opposite flow directions on the largest surface of the battery cell. Furthermore, the first and second liquid cooling branches are arranged continuously in a serpentine pattern around the battery cell, which allows the liquid cooling medium to flow and dissipate heat fully on the surface of the battery cell, thereby improving the heat dissipation efficiency of the heat dissipation structure.

[0030] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of an energy storage structure provided according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of a heat dissipation structure according to an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of the first heat dissipation structure provided in the embodiment of the present utility model on an energy storage structure;

[0035] Figure 4 This is a first-angle schematic diagram of the second heat dissipation structure provided in the embodiment of the present utility model on the energy storage structure;

[0036] Figure 5 This is a second-angle schematic diagram of the second heat dissipation structure provided in the embodiment of the present utility model on the energy storage structure;

[0037] Figure 6 This is a schematic diagram of the third heat dissipation structure provided in the embodiment of the present utility model on an energy storage structure;

[0038] Figure 7 yes Figure 4 A magnified structural diagram at point A. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0041] Figure 1 This is a schematic diagram of an energy storage structure according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a heat dissipation structure according to an embodiment of the present utility model. Figure 3This is a schematic diagram of the first heat dissipation structure provided in the embodiment of the present utility model on an energy storage structure, combined with... Figure 1 , Figure 2 and Figure 3 As shown, the energy storage structure includes at least one battery cell cluster 1, and the battery cell cluster 1 includes a plurality of battery cells 10 arranged along a first direction;

[0042] The heat dissipation structure includes at least one sub-heat dissipation structure 20, which corresponds one-to-one with the battery cell cluster 1. The sub-heat dissipation structure 20 includes a liquid inlet 21, a liquid outlet 22, and a liquid cooling pipe 23. The liquid cooling pipe 23 is connected to the liquid inlet 21 and the liquid outlet 22 respectively.

[0043] The liquid cooling pipeline 23 includes at least one first liquid cooling branch 231 and at least one second liquid cooling branch 232. The first liquid cooling branch 231 is arranged continuously in a serpentine pattern around the plurality of battery cells 10, and the second liquid cooling branch 232 is arranged continuously in a serpentine pattern around the plurality of battery cells 10. Furthermore, at the maximum surface of any battery cell 10, the flow direction of the liquid cooling medium in the first liquid cooling branch 231 is opposite to the flow direction of the liquid cooling medium in the second liquid cooling branch 232. The plane containing the maximum surface intersects with the first direction.

[0044] The cell cluster 1 can be a battery assembly, composed of several cells 10 connected in series or parallel to provide a corresponding voltage or capacity. A single cell cluster 1 may include multiple cells 10, and the first direction may be the x-direction, such as... Figure 1 As shown, multiple battery cells 10 are arranged along the x-th direction to form a battery cell cluster 1.

[0045] The heat dissipation structure is used to dissipate heat from the surface of the battery cell cluster 1. One sub-heat dissipation structure 20 corresponds to one battery cell cluster 1, and the sub-heat dissipation structure 20 is in contact with the surface of the battery cell cluster 1. By introducing a liquid cooling medium into the sub-heat dissipation structure 20, the heat on the surface of the battery cell cluster 1 is carried away by the liquid cooling medium. The liquid cooling medium can be 50% ethylene glycol. The inlet 21 and outlet 22 are respectively connected to the liquid cooling pipe 23. The inlet 21 is used to introduce the liquid cooling medium into the liquid cooling pipe 23, and the outlet 22 is used to discharge the liquid cooling medium to carry away the heat from the surface of the battery cell cluster 1, thereby achieving the purpose of heat dissipation for the battery cell cluster 1.

[0046] The liquid cooling pipeline 23 includes a first liquid cooling branch 231 and a second liquid cooling branch 232. Figure 2The solid line corresponds to the first liquid cooling branch 231, and the dashed line corresponds to the second liquid cooling branch 232. The two liquid cooling branches share a liquid inlet 21 and a liquid outlet 22. The first liquid cooling branch 231 and the second liquid cooling branch 232 are arranged in a serpentine continuous pattern around multiple battery cells 10, and the flow directions of the first liquid cooling branch 231 and the second liquid cooling branch 232 on the largest surface of the battery cell 10 are opposite. This causes the liquid cooling medium to be diverted at the largest surface of the battery cell 10 when it enters the liquid inlet 21, which enhances the fluidity of the liquid cooling medium on the surface of the battery cell 10 and helps the liquid cooling pipe 23 dissipate heat. It is understood that the first liquid cooling branch 231 and the second liquid cooling branch 232 are both arranged in a serpentine continuous manner around multiple battery cells 10. The first liquid cooling branch 231 can be arranged in a serpentine continuous manner around the battery cells 10, and the battery cells 10 can be a single battery cell 10 or multiple battery cells 10. The second liquid cooling branch 232 can be arranged in a serpentine continuous manner around the battery cells 10, and the battery cells 10 it surrounds can be a single battery cell 10 or multiple battery cells 10.

[0047] For example, the first direction is Figure 1 In the x-direction, the largest surface is the outer surface of the cell cluster 1 perpendicular to x, which is also the largest outer surface of a single cell 10. The cell cluster 1 includes two largest surfaces, which are opposite to each other and perpendicular to the arrangement direction of the cells 10, i.e., the x-direction. An inlet 21 and an outlet 22 are respectively provided on the two largest surfaces. The flow directions of the first liquid cooling branch 231 and the second liquid cooling branch 232 on the largest surfaces are opposite, that is, the liquid cooling medium enters the liquid cooling pipe from the inlet 21 and is split on the first liquid cooling branch 231 and the second liquid cooling branch 232, respectively dissipating heat on different surfaces of the cell 10 along opposite flow directions. Since the first liquid cooling branch 231 and the second liquid cooling branch 232 are serpentine and continuous around the cell 10, the contact area between the liquid cooling medium and the surface of the cell 10 is increased, the fluidity of the liquid cooling medium is enhanced, and the heat dissipation efficiency of the liquid cooling pipe 23 is improved.

[0048] The technical solution of this utility model embodiment enhances the fluidity of the liquid cooling medium and the contact area between the liquid cooling medium and the surface of the battery cell by providing at least two liquid cooling branches with opposite flow directions on the largest surface of the battery cell. Furthermore, the first and second liquid cooling branches are arranged continuously and in a serpentine pattern around the battery cell, allowing the liquid cooling medium to flow and dissipate heat fully on the surface of the battery cell, thereby improving the heat dissipation efficiency of the heat dissipation structure.

[0049] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3As shown, the battery cell 10 includes a first maximum surface 101, a second maximum surface, a first side surface 102, and a second side surface. The first maximum surface 101 and the second maximum surface are arranged opposite to each other along a first direction. The first side surface 102 connects the first maximum surface 101 and the second maximum surface, and the second side surface connects the first maximum surface 101 and the second maximum surface. The first side surface 102 and the second side surface are arranged opposite to each other along a second direction, which is the flow direction of the liquid cooling medium on the maximum surface.

[0050] Two adjacent battery cells 10 arranged along the first direction include a first battery cell 10 and a second battery cell 10;

[0051] The first liquid cooling branch 231 surrounds the first maximum surface 101, the first side surface 102 and the second maximum surface of the first battery cell 10, and surrounds the first maximum surface 101, the second side surface and the second maximum surface of the second battery cell 10.

[0052] The second liquid-cooled branch 232 surrounds the first maximum surface 101, the second side surface, and the second maximum surface of the first battery cell 10, and surrounds the first maximum surface 101, the first side surface 102, and the second maximum surface of the second battery cell 10. Figure 1 The second largest surface and the second side surface are not shown in the diagram. The opposite side of the first largest surface 101 is the second largest surface, and the opposite side surface 102 is the second side surface.

[0053] Wherein, the shape of the battery cell 10 can be a hexahedron, then the first maximum surface 101 and the second maximum surface can be the maximum surfaces of the hexahedron, and they are opposite faces. In the same battery cell cluster 1, the second maximum surface of the first battery cell 10 contacts the first maximum surface 101 of the second battery cell 10, the second maximum surface of the second battery cell 10 contacts the second maximum surface of the third battery cell 10, and so on, the (N-1)th second maximum surface contacts the first maximum surface 101 of the Nth battery cell 10. The second direction is on the maximum surface and perpendicular to the first direction, such as... Figure 1 In the y-direction shown, the first side 102 and the second side are used to connect the first maximum surface 101 and the second maximum surface and are arranged opposite to each other along the second direction. It can be understood that when the battery cell 10 is a hexahedron, the first side 102 and the second side are both one surface, and when the battery cell 10 is an octahedron or more faces, the first side 102 and the second side can be two or more surfaces. This embodiment of the utility model does not limit this.

[0054] The first cell 10 can be the outermost cell 10 on the cell cluster 1, and the second cell 10 is adjacent to the first cell 10. The first liquid cooling branch 231 is serpentine and continuously arranged on the cell 10. The first liquid cooling branch 231 surrounds the first maximum surface 101, the first side surface 102 and the second maximum surface of the first cell 10, and also passes through the first maximum surface 101, the first side surface 102 and the second maximum surface of the first cell 10 in sequence along the flow path. Since the first cell 10 and the second cell 10 are adjacent, the second maximum surface of the first cell 10 is arranged opposite to the first maximum surface 101 of the second cell 10. When the first liquid cooling branch 231 contacts the second maximum surface of the first cell 10, it also contacts the first maximum surface 101 of the second cell 10. The second liquid cooling branch 232 surrounds the first maximum surface 101, the first side surface 102 and the second maximum surface of the second cell 10, and the flow path also passes through the first maximum surface 101, the first side surface 102 and the second maximum surface of the second cell 10 in sequence. It is understandable that the same setting applies when the cell cluster 1 includes multiple cells 10.

[0055] The technical solution of this utility model embodiment, by specifically defining the flow path of the first liquid cooling branch and the second liquid cooling branch, allows the liquid cooling medium in the first liquid cooling branch and the second liquid cooling branch to flow through the first maximum surface, the second maximum surface, the first side surface and the second side surface of each battery cell, thereby increasing the contact area between the liquid cooling pipeline and the battery cell and improving the heat dissipation efficiency of the heat dissipation structure.

[0056] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 As shown, the battery cell 10 includes a first maximum surface 101 and a second maximum surface;

[0057] In the same cell cluster 1, the coverage area of ​​the first liquid cooling branch 231 and the second liquid cooling branch 232 on the first maximum surface 101 of the first cell 10 in the cell cluster 1 is smaller than the area of ​​the first maximum surface 101 of the first cell 10; the coverage area of ​​the first liquid cooling branch 231 and the second liquid cooling branch 232 on the second maximum surface of the last cell 10 in the cell cluster 1 is smaller than the area of ​​the second maximum surface of the last cell 10; and the coverage area of ​​the first liquid cooling branch 231 and the second liquid cooling branch 232 on other maximum surfaces in the cell cluster 1 is equal to the area of ​​the maximum surface. Figure 1 (The second largest surface is not shown in the diagram, where the opposite of the first largest surface 101 is the second largest surface.)

[0058] Since the first liquid cooling branch 231 and the second liquid cooling branch 232 have different flow directions on the first maximum surface 101 of the first cell 10, and both the first liquid cooling branch 231 and the second liquid cooling branch 232 cover the first maximum surface 101 of the first cell 10, the coverage area of ​​the first maximum surface 101 of the first cell 10 in the cell cluster 1 can be set to be smaller than the area of ​​the first maximum surface 101 of the first cell 10. Furthermore, the first liquid cooling branch 231 and the second liquid cooling branch 232 completely cover other maximum surfaces in the cell cluster 1, such as the opposite surface of the first maximum surface 101 of the first cell 10.

[0059] In some embodiments, within the same cell cluster 1, the coverage area of ​​the first liquid cooling branch 231 and the second liquid cooling branch 232 on the first maximum surface 101 of the first cell 10 in the cell cluster 1 is equal to half the area of ​​the first maximum surface 101 of the first cell 10; the coverage area of ​​the first liquid cooling branch 231 and the second liquid cooling branch 232 on the second maximum surface of the last cell 10 in the cell cluster 1 is equal to half the area of ​​the second maximum surface of the last cell 10. Wherein, the coverage area of ​​the first maximum surface 101 of the first cell 10 in the cell cluster 1 by the first liquid cooling branch 231 and the second liquid cooling branch 232 is equal to half the area of ​​the first maximum surface 101 of the first cell 10, such that when the liquid cooling medium enters the liquid cooling pipe through the inlet 21, it is diverted along the first liquid cooling branch 231 and the second liquid cooling branch 232, and the first liquid cooling branch 231 and the second liquid cooling branch 232 cover half the area of ​​the first maximum surface 101. Furthermore, when the first liquid cooling branch 231 flows along the first maximum surface 101, through the first side 102, to the second maximum surface, and when the second liquid cooling branch 232 flows along the first maximum surface 101, through the second side, to the second maximum surface, the first liquid cooling branch 231 and the second liquid cooling branch 232 respectively alternately cover the second maximum surface, so as to achieve full contact with the maximum surfaces of other cells 10.

[0060] The technical solution of this utility model embodiment, by specifically limiting the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch on the first maximum surface and other maximum surfaces, allows the liquid cooling medium in the first liquid cooling branch and the second liquid cooling branch to flow through the first maximum surface, the second maximum surface, the first side surface and the second side surface of each battery cell to the maximum extent, thereby increasing the contact area between the liquid cooling pipeline and the battery cell and improving the heat dissipation efficiency of the heat dissipation structure.

[0061] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3As shown, the first liquid cooling branch 231 includes at least two first liquid cooling sub-branches 2311, and / or the second liquid cooling branch 232 includes at least two second liquid cooling sub-branches 2321;

[0062] On the largest surface of any cell 10, the first liquid-cooled sub-branch 2311 and the second liquid-cooled sub-branch 2321 are arranged alternately in a third direction; the third direction is parallel to the plane where the largest surface is located and intersects with the flow direction of the liquid cooling medium on the largest surface.

[0063] The third direction can be the z-direction shown in the figure, and the third direction is perpendicular to the second direction. The first liquid cooling branch 231 includes at least two first liquid cooling sub-branches 2311, and the second liquid cooling branch 232 includes at least two second liquid cooling sub-branches 2321. Figure 1 Taking the example of three first liquid-cooled sub-branch 2311 and two second liquid-cooled sub-branch 2321, it is understood that this embodiment of the invention does not limit the number of first liquid-cooled sub-branch 2311 and second liquid-cooled sub-branch 2321. In particular, providing more liquid-cooled sub-branch can further reduce the flow resistance of the liquid cooling medium in the liquid-cooled pipe 23 and improve heat dissipation efficiency.

[0064] Along the third direction, the first liquid-cooled sub-branch 2311 and the second liquid-cooled sub-branch 2321 are arranged alternately to avoid cross-contamination of the liquid cooling medium entering the first liquid-cooled sub-branch 2311 and the second liquid-cooled sub-branch 2321 through the liquid inlet 21. This clarifies the flow direction of the first liquid-cooled sub-branch 2311 and the flow direction of the second liquid-cooled sub-branch 2321, so that the liquid cooling mediums with different flow directions do not interfere with each other.

[0065] In some embodiments, the coverage area of ​​the first liquid-cooled sub-branch 2311 and the second liquid-cooled sub-branch 2321 on the first maximum surface 101 is equal to half of the first maximum surface 101. Since the first liquid-cooled sub-branch 2311 and the second liquid-cooled sub-branch 2321 are arranged alternately, the coverage area of ​​the first liquid-cooled sub-branch 2311 on the second maximum surface and the second liquid-cooled sub-branch 2321 on the third maximum surface is equal to the area of ​​the second maximum surface, thereby improving the heat dissipation efficiency of the heat dissipation structure.

[0066] The technical solution of this utility model embodiment, by setting up multiple first liquid cooling sub-branch and second liquid cooling sub-branch, and arranging the first liquid cooling sub-branch and second liquid cooling sub-branch in an alternating manner, can reduce the flow resistance of the liquid cooling medium when it flows to the liquid cooling pipeline through the inlet. This makes the flow direction of the liquid cooling medium in the liquid cooling pipeline more uniform and improves the heat dissipation efficiency of the heat dissipation structure.

[0067] Optional, continue to refer to Figure 1 , Figure 2, Figure 3 As shown, for the same cell cluster 1, the liquid inlet 21 is located at the center of the largest surface of the first cell 10 in the cell cluster 1;

[0068] The liquid outlet 22 is located at the center of the largest surface of the last cell 10 in the cell cluster 1.

[0069] In the same cell cluster 1, the liquid inlet 21 is set at the center of the maximum surface of the first cell 10, so that the liquid cooling medium enters along the center of the maximum surface and flows outward in the direction of the liquid cooling pipeline 23, thereby further improving the uniformity of the liquid cooling medium flow.

[0070] The outlet 22 is positioned at the center of the largest surface of the last cell 10, so that the liquid cooling medium flowing through the outlet converges at the center of the largest surface, ensuring the synchronicity and efficiency of the liquid cooling medium discharge.

[0071] The technical solution of this utility model embodiment is to set the liquid outlet at the center of the largest surface of the first cell in the cell cluster 1 and the liquid outlet at the center of the largest surface of the last cell in the cell cluster, so that the liquid cooling medium can flow evenly along the center of the largest surface and be discharged synchronously, thus ensuring the heat dissipation efficiency of the heat dissipation structure.

[0072] Optional, Figure 4 This is a schematic diagram of the second heat dissipation structure provided in the embodiment of the present invention on an energy storage structure. Figure 5 This is a second-angle schematic diagram of the second heat dissipation structure provided in the embodiment of the present utility model on the energy storage structure, combined with... Figure 4 and Figure 5 As shown, the energy storage structure includes at least two battery cell clusters 1, and the heat dissipation structure includes at least two sub-heat dissipation structures 20. The at least two battery cell clusters 1 are arranged along a second direction, and the at least two sub-heat dissipation structures 20 are arranged along a second direction, which is the flow direction of the liquid cooling medium on the maximum surface.

[0073] There are two sub-heat dissipation structures 20 arranged adjacent to each other along the second direction, and the liquid inlet 21 of one sub-heat dissipation structure 20 is connected to the liquid outlet 22 of the other sub-heat dissipation structure 20.

[0074] Since the number of cell clusters 1 determines the power of the battery module, the energy storage structure includes at least two cell clusters 1 in specific application scenarios. The number of cell clusters 1 corresponds one-to-one with the number of sub-heat dissipation structures 20.

[0075] For example, refer to Figure 4 and Figure 5As shown, taking two battery cell clusters 1 as an example, the two battery cell clusters 1 are arranged along the y-direction and extend in the x-direction. The two battery cell clusters 1 include two sets of heat dissipation structures. In order to improve the heat dissipation efficiency of the two battery cell clusters 1, the liquid inlet 21 of one sub-heat dissipation structure 20 and the liquid outlet 22 of the other heat dissipation structure are connected. During operation, the liquid cooling medium enters along the liquid inlet 21 of the first battery cell cluster 1, flows into the liquid inlet 21 of the second battery cell cluster 1 through the liquid outlet 22 of the first sub-heat dissipation structure 20, and flows along the second sub-heat dissipation structure 20 through the liquid outlet 22 of the second sub-heat dissipation structure 20, thereby completing the heat dissipation of the two battery cell clusters 1 and improving the heat dissipation efficiency of multiple battery cell clusters 1.

[0076] Optional, Figure 6 This is a schematic diagram of the third heat dissipation structure provided in the embodiments of this utility model on an energy storage structure, as shown below. Figure 6 As shown, the energy storage structure includes at least four battery cell clusters 1, and the heat dissipation structure includes at least four sub-heat dissipation structures 20.

[0077] The four sub-heat dissipation structures 20 arranged arbitrarily adjacent to each other along the second direction include a first sub-heat dissipation structure 201, a second sub-heat dissipation structure 202, a third sub-heat dissipation structure 203 and a fourth sub-heat dissipation structure 204 arranged sequentially along the second direction.

[0078] Among them, the liquid inlet 21 of the second sub-heat dissipation structure 202 is connected to the liquid inlet 21 of the third sub-heat dissipation structure 203, the liquid outlet 22 of the second sub-heat dissipation structure 202 is connected to the liquid inlet 21 of the first sub-heat dissipation structure 201, and the liquid outlet 22 of the third sub-heat dissipation structure 203 is connected to the liquid inlet 21 of the fourth sub-heat dissipation structure 204.

[0079] In this energy storage structure, when the energy storage structure includes four battery cell clusters 1, the four battery cell clusters 1 are arranged along the y-direction and extend along the x-direction. To improve the heat dissipation efficiency of the two battery cell clusters 1, the liquid inlet 21 of the second sub-heat dissipation structure 202 is connected to the liquid inlet 21 of the third sub-heat dissipation structure 203, the liquid outlet 22 of the second sub-heat dissipation structure 202 is connected to the liquid inlet 21 of the first sub-heat dissipation structure 201, and the liquid outlet 22 of the third sub-heat dissipation structure 203 is connected to the liquid inlet 21 of the fourth sub-heat dissipation structure 204. During operation, the main liquid inlet 21 is connected to the pipeline connecting the liquid inlet 21 of the second sub-heat dissipation structure 202 and the liquid inlet 21 of the third sub-heat dissipation structure 203. The cooling medium enters through inlet 21 and flows to the second sub-heat dissipation structure 202 and the third sub-heat dissipation structure 203, respectively. It then exits through outlets 22 of the second and third sub-heat dissipation structures 202 and 203, respectively, to the inlet 21 of the first sub-heat dissipation structure 201 and the inlet 21 of the fourth sub-heat dissipation structure 204. This allows the cooling medium to exit through outlets 22 of the first and fourth sub-heat dissipation structures 201 and 204, respectively, thus completing the circulation of the cooling medium through these structures and improving their heat dissipation efficiency. It is understandable that when four battery cell clusters 1 are arranged, the heat dissipation efficiency of the second and third battery cell clusters 1 is often different. Therefore, the cooling medium is first introduced into the second and third battery cell clusters 1 to reduce the temperature difference between them and improve the uniformity of the liquid cooling pipeline 23.

[0080] Optional, Figure 7 yes Figure 4 An enlarged structural diagram at point A, combined with... Figure 4 and Figure 7 As shown, the energy storage structure includes at least two battery cell clusters 1, and the heat dissipation structure includes at least two sub-heat dissipation structures 20. The at least two battery cell clusters 1 are arranged along a second direction, and the at least two sub-heat dissipation structures 20 are arranged along a second direction, which is the flow direction of the liquid cooling medium on the maximum surface.

[0081] The bend between the first liquid cooling branch 231 and the second liquid cooling branch 232 includes a chamfer structure 3;

[0082] Furthermore, the chamfer angles of adjacent chamfer structures 3 along the second direction are the same.

[0083] In the case where the energy storage structure includes at least two battery cell clusters 1, in order to ensure that the sub-heat dissipation structures 20 can be in close contact, a chamfer structure 3 is provided at the bend of the first liquid cooling branch 231 and the second liquid cooling branch 232, and the chamfer angles of the first liquid cooling branch 231 and the second liquid cooling branch 232 are the same. When the first sub-heat dissipation structure 20120 and the first sub-heat dissipation structure 201 are in contact, gaps between the sub-heat dissipation structures 20 are avoided, thereby improving the performance of the heat dissipation structure.

[0084] Optionally, the heat dissipation structure may also include thermally conductive adhesive disposed between the sub-heat dissipation structure and the battery cell cluster;

[0085] The battery cell clusters are bonded to the sub-heat dissipation structure using thermally conductive adhesive. (The thermally conductive adhesive is not shown in the figure.)

[0086] The thermally conductive adhesive can be a silicone grease material, which can be filled between the battery cell cluster and the sub-heat dissipation structure to avoid gaps between the battery cell cluster and the sub-heat dissipation structure, enhance thermal conductivity, and further improve heat dissipation efficiency.

[0087] The technical solution of this utility model embodiment enhances the fluidity of the liquid cooling medium and the contact area between the liquid cooling medium and the surface of the battery cell by providing at least two liquid cooling branches with opposite flow directions on the largest surface of the battery cell. Furthermore, the first and second liquid cooling branches are arranged continuously and in a serpentine pattern around the battery cell, allowing the liquid cooling medium to flow and dissipate heat fully on the surface of the battery cell, thereby improving the heat dissipation efficiency of the heat dissipation structure.

[0088] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A heat dissipating structure of an energy storage structure, characterized by, The energy storage structure includes at least one battery cell cluster, the battery cell cluster including a plurality of battery cells arranged along a first direction; The heat dissipation structure includes at least one sub-heat dissipation structure, each sub-heat dissipation structure corresponding to one of the battery cell clusters. Each sub-heat dissipation structure includes a liquid inlet, a liquid outlet, and a liquid cooling pipeline. The liquid cooling pipeline is connected to the liquid inlet and the liquid outlet, respectively. The liquid cooling pipeline includes at least one first liquid cooling branch and at least one second liquid cooling branch. The first liquid cooling branch is arranged continuously in a serpentine pattern around the plurality of battery cells, and the second liquid cooling branch is arranged continuously in a serpentine pattern around the plurality of battery cells. Furthermore, at the maximum surface of any of the battery cells, the flow direction of the liquid cooling medium in the first liquid cooling branch is opposite to the flow direction of the liquid cooling medium in the second liquid cooling branch. The plane containing the maximum surface intersects with the first direction.

2. The heat dissipating structure according to claim 1, wherein The battery cell includes a first maximum surface, a second maximum surface, a first side surface, and a second side surface. The first maximum surface and the second maximum surface are disposed opposite to each other along a first direction. The first side surface connects the first maximum surface and the second maximum surface, and the second side surface connects the first maximum surface and the second maximum surface. The first side surface and the second side surface are disposed opposite to each other along a second direction. The second direction is the flow direction of the liquid cooling medium on the maximum surface. The two battery cells arranged adjacent to each other along the first direction include a first battery cell and a second battery cell; The first liquid cooling branch surrounds the first maximum surface, the first side surface, and the second maximum surface of the first battery cell, and surrounds the first maximum surface, the second side surface, and the second maximum surface of the second battery cell; The second liquid cooling branch surrounds the first maximum surface, the second side surface, and the second maximum surface of the first cell, and surrounds the first maximum surface, the first side surface, and the second maximum surface of the second cell.

3. The heat dissipating structure according to claim 1, wherein The battery cell includes a first maximum surface and a second maximum surface; In the same cell cluster, the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch of the first cell in the cell cluster is smaller than the area of ​​the first maximum surface of the first cell. The first liquid cooling branch and the second liquid cooling branch cover an area smaller than the area of ​​the second largest surface of the last cell in the cell cluster; and the first liquid cooling branch and the second liquid cooling branch cover an area equal to the area of ​​the other largest surfaces in the cell cluster.

4. The heat dissipating structure according to claim 3, wherein In the same cell cluster, the coverage area of ​​the first liquid cooling branch and the second liquid cooling branch of the first cell in the cell cluster is equal to half the area of ​​the first maximum surface of the first cell. The first liquid cooling branch and the second liquid cooling branch cover an area equal to half the area of ​​the second largest surface of the last cell in the cell cluster.

5. The heat dissipating structure according to claim 1, wherein The first liquid cooling branch includes at least two first liquid cooling sub-branches, and / or the second liquid cooling branch includes at least two second liquid cooling sub-branches; On the largest surface of any of the cells, the first liquid-cooled sub-branch and the second liquid-cooled sub-branch are arranged alternately in a third direction; the third direction is parallel to the plane containing the largest surface and intersects with the flow direction of the liquid cooling medium on the largest surface.

6. The heat dissipating structure according to claim 1, wherein For the same battery cell cluster, the liquid inlet is located at the center of the largest surface of the first battery cell in the battery cell cluster; The liquid outlet is located at the center of the largest surface of the last cell in the cell cluster.

7. The heat dissipating structure according to claim 1, wherein The energy storage structure includes at least two battery cell clusters, and the heat dissipation structure includes at least two sub-heat dissipation structures. The at least two battery cell clusters are arranged along a second direction, and the at least two sub-heat dissipation structures are arranged along the second direction, where the second direction is the flow direction of the liquid cooling medium on the maximum surface. There are two sub-heat dissipation structures arranged adjacent to each other along the second direction, wherein the liquid inlet of one sub-heat dissipation structure is connected to the liquid outlet of the other sub-heat dissipation structure.

8. The heat dissipating structure according to claim 7, wherein The energy storage structure includes at least four of the battery cell clusters, and the heat dissipation structure includes at least four of the sub-heat dissipation structures; The four sub-heat dissipation structures arranged arbitrarily adjacent to each other along the second direction include a first sub-heat dissipation structure, a second sub-heat dissipation structure, a third sub-heat dissipation structure, and a fourth sub-heat dissipation structure arranged sequentially along the second direction; The liquid inlet of the second sub-heat dissipation structure is connected to the liquid inlet of the third sub-heat dissipation structure, the liquid outlet of the second sub-heat dissipation structure is connected to the liquid inlet of the first sub-heat dissipation structure, and the liquid outlet of the third sub-heat dissipation structure is connected to the liquid inlet of the fourth sub-heat dissipation structure.

9. The heat dissipating structure according to claim 1, wherein The energy storage structure includes at least two battery cell clusters, and the heat dissipation structure includes at least two sub-heat dissipation structures. The at least two battery cell clusters are arranged along a second direction, and the at least two sub-heat dissipation structures are arranged along the second direction, where the second direction is the flow direction of the liquid cooling medium on the maximum surface. The bend between the first liquid cooling branch and the second liquid cooling branch includes a chamfered structure; Furthermore, the chamfer angles of adjacent chamfer structures along the second direction are the same.

10. The heat dissipating structure according to claim 1, wherein The heat dissipation structure also includes thermally conductive adhesive disposed between the sub-heat dissipation structure and the battery cell cluster; The battery cell cluster is bonded to the sub-heat dissipation structure by the thermally conductive adhesive.

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