Liquid cooling plate assembly, battery cluster and energy storage equipment

Abstract

The utility model provides a liquid cooling plate assembly, a battery cluster and energy storage equipment. The liquid cooling plate assembly comprises a liquid cooling plate formed by extrusion; the liquid cooling plate is provided with a flow channel, a complete first plane and a complete second plane; the first plane and the second plane are oppositely arranged; the first plane is used for bearing at least one battery cell and carrying out liquid cooling on the borne battery cell; and the second plane is used for covering at least one battery cell and carrying out liquid cooling on the covered battery cell. The first plane and the second plane, which are oppositely arranged, of the liquid cooling plate can be used for cooling the battery cell. The superficial area of the liquid cooling plate for heat transfer with the battery cell is increased, and the heat transfer efficiency is improved. Under the condition that the refrigeration requirement is certain, the volume of the liquid cooling plate is small, and the miniaturization requirement of the energy storage equipment is better met.

Description

Technical Field

[0001] The present application relates to the field of energy storage equipment, and specifically to a liquid cooling plate assembly, a battery cluster, and an energy storage device. Background Art

[0002] With the rapid development of energy storage technology, the energy demand of energy storage devices is increasing, necessitating efficient thermal management solutions to ensure system safety and stability under high loads. Existing thermal management systems typically utilize liquid cooling technology, using liquid cold plate assemblies to exchange heat with battery cells to cool them. However, traditional thermal management systems often require large sizes to meet the growing cooling needs, making them difficult to meet the miniaturization requirements of energy storage devices. Summary of the Invention

[0003] Multiple embodiments of the present application provide a liquid cooling plate assembly, a battery cluster, and an energy storage device that better meet the miniaturization requirements of energy storage devices.

[0004] On the one hand, an embodiment of the present application provides a liquid cooling plate assembly, which includes an extruded liquid cooling plate; the liquid cooling plate has a flow channel and a complete first plane and a second plane; the first plane is arranged opposite to the second plane; the first plane is used to carry at least one battery cell and liquid-cool the battery cell it carries; the second plane is used to cover at least one battery cell and liquid-cool the battery cell it covers.

[0005] In some embodiments, the flow channel has a first section and a second section arranged side by side and extending in the same direction, and the first section and the second section are connected.

[0006] In some embodiments, the first section is connected to a liquid inlet, and the second section is connected to a liquid outlet.

[0007] In some embodiments, the liquid cooling plate has an inner cavity; the inner cavity has a partition structure that divides the inner cavity into the first section and the second section;

[0008] The length of the spacing structure along the extending direction of the first segment or the second segment is smaller than the length of the inner cavity along the extending direction of the first segment, so that the first segment and the second segment are connected.

[0009] In some embodiments, the liquid cooling plate has a first liquid cooling end and a second liquid cooling end along the extension direction of the first section, and the first liquid cooling end and the second liquid cooling end are respectively provided with a sealing member;

[0010] The sealing member forms a closed flow channel in the liquid cooling plate.

[0011] In some embodiments, a length of the liquid cooling plate along an extension direction of the first segment or the second segment is greater than a width of the liquid cooling plate along an extension direction of the first segment or the second segment.

[0012] In some embodiments, the flow channel includes a first flow channel and a second flow channel arranged side by side, and the first flow channel and the second flow channel are not connected.

[0013] On the other hand, the present application also provides a battery cluster comprising a battery pack and a liquid cooling plate assembly;

[0014] Among them, it includes an extruded liquid cooling plate; the liquid cooling plate has a flow channel and a complete first plane and a second plane; the first plane is arranged opposite to the second plane; the first plane is used to carry at least one battery cell and liquid-cool the battery cell it carries; the second plane is used to cover at least one battery cell and liquid-cool the battery cell it covers;

[0015] The battery cell group of the battery pack is in thermal contact with the first plane or the second plane of the liquid cooling plate.

[0016] In some embodiments, the flow channel includes a first flow channel and a second flow channel arranged side by side;

[0017] The battery pack includes a first battery cell group and a second battery cell group. The contact position between the first battery cell group and the liquid cooling plate corresponds to the first flow channel, and the contact position between the second battery cell group and the liquid cooling plate corresponds to the second flow channel.

[0018] In some embodiments, the battery pack includes a first battery pack and a second battery pack, the liquid cooling plate is provided between the first battery pack and the second battery pack, the bottom surface of the first battery pack is in thermal contact with the first plane of the liquid cooling plate, and the top surface of the second battery pack is in thermal contact with the second plane of the liquid cooling plate.

[0019] In some embodiments, the battery cluster further includes a thermally conductive adhesive layer disposed between the liquid cooling plate and the battery cell group.

[0020] In some embodiments, the flow channel has a first section and a second section arranged side by side and extending in the same direction, and the first section and the second section are connected.

[0021] In some embodiments, the first section is connected to a liquid inlet, and the second section is connected to a liquid outlet.

[0022] In some embodiments, an inner cavity is provided in the liquid cooling plate; a partition structure is provided in the inner cavity, and the partition structure divides the inner cavity into the first section and the second section;

[0023] The length of the spacing structure along the extending direction of the first segment or the second segment is smaller than the length of the inner cavity along the extending direction of the first segment, so that the first segment and the second segment are connected.

[0024] In some embodiments, the liquid cooling plate has a first liquid cooling end and a second liquid cooling end along the extension direction of the first section, and the first liquid cooling end and the second liquid cooling end are respectively provided with a sealing member;

[0025] The sealing member forms a closed flow channel in the liquid cooling plate.

[0026] On the other hand, the present application further provides an energy storage device, which includes an energy storage cabinet and a battery cluster provided by any embodiment of the present application; the battery cluster is arranged in the energy storage cabinet.

[0027] In various embodiments provided herein, both the first and second surfaces of the liquid cooling plate, which are positioned relative to each other, can be used to cool the battery cells. This increases the surface area of ​​the liquid cooling plate available for heat transfer with the battery cells, improving heat transfer efficiency. Given a certain cooling requirement, the liquid cooling plate's smaller size better meets the miniaturization requirements of energy storage devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a liquid cooling plate assembly provided in one embodiment of the present application.

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the liquid cooling plate assembly from another perspective.

[0030] Figure 3 for Figure 2 Cross-sectional view of the liquid cold plate assembly along the MM direction.

[0031] Figure 4 for Figure 3 Liquid cooling plate components along Figure 3 Cross-sectional view along the NN direction.

[0032] Figure 5 for Figure 4 A partial enlarged view of middle A.

[0033] Figure 6 A schematic structural diagram of a battery cluster provided in one embodiment of the present application.

[0034] Figure 7 for Figure 6 Schematic diagram of the structure of the battery cluster from another perspective.

[0035] Description of Reference Numerals

[0036] 100, liquid cooling plate assembly; 1000, battery cluster; 200, battery pack; 210, first battery cell group; 220, second battery cell group; 230, first battery pack; 240, second battery pack; 110, liquid cooling plate; 111, flow channel; 111a, first flow channel; 111b, second flow channel; 1111, first section; 1112, liquid inlet ; 1113, second section; 1114, liquid outlet; 112, first plane; 113, second plane; 114, inner cavity; 115, spacing structure; 116, first liquid cooling end; 117, second liquid cooling end; 120, sealing member. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0038] In this application, the drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show details of the local features.

[0039] Unless otherwise indicated, all technical and scientific terms used in this application have the same meaning as those generally understood by those skilled in the art in the technical field of this application. The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit the scope of this application. The term "and / or" used in this application includes any and all combinations of one or more related listed items. The singular forms "a", "above", and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise.

[0040] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0041] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of a simplified description of this application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation to this application.

[0042] In the description of this application, unless otherwise expressly defined, the terms "installed," "connected," "connect," "fixed," and "disposed" should be understood broadly. For example, "connection" can mean fixed, removable, or integrated; it can mean mechanical or electrical; it can mean direct or indirect connection through an intermediary; it can also mean internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0043] In the description of this application, unless otherwise explicitly defined, a first feature being “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Moreover, a first feature being “on,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0044] Researchers have discovered that in traditional energy storage devices, when heat is exchanged between the liquid cooling plate and the battery cell, only one surface of the plate is in thermal contact with the battery cell, resulting in low heat exchange efficiency. Consequently, given a given cooling requirement, the total volume of the plate is relatively large.

[0045] Based on this, researchers have developed a liquid cooling plate assembly comprising an extruded liquid cooling plate with a first surface and a second surface positioned opposite each other, both of which can be used to cool the battery cells. This increases the surface area of ​​the liquid cooling plate available for heat transfer with the battery cells, improving heat transfer efficiency. Given a certain cooling requirement, the liquid cooling plate's smaller size better meets the miniaturization requirements of energy storage devices.

[0046] See also Figures 1 to 6One embodiment of the present application provides a liquid cooling plate assembly 100, which includes an extruded liquid cooling plate 110 having a flow channel 111 and a complete first plane 112 and a second plane 113. The first plane 112 and the second plane 113 are disposed opposite each other. The first plane 112 is configured to support at least one battery cell and provide liquid cooling to the supported battery cell. The second plane 113 is configured to cover at least one battery cell and provide liquid cooling to the covered battery cell. In other words, battery cells can be disposed on both the side of the liquid cooling plate 110 where the first plane 112 and the side where the second plane 113 are located, and the battery cells can be thermally contacted with the battery cells to cool the battery cells.

[0047] It is understood that the complete first plane 112 means that the entire surface of the liquid cooling plate 110 on the side where the first plane 112 is located is a plane, that is, the first plane 112. The complete second plane 113 means that the entire surface of the liquid cooling plate 110 on the side where the second plane 113 is located is a plane, that is, the second plane 113.

[0048] The liquid cooling plate assembly 100 and the oppositely positioned first and second surfaces 112 and 113 of the liquid cooling plate 110 can both be used to cool the battery cells. This increases the surface area of ​​the liquid cooling plate 110 available for heat transfer with the battery cells, improving heat transfer efficiency. Given a certain cooling requirement, the liquid cooling plate 110 can be relatively small, better meeting the miniaturization requirements of energy storage devices.

[0049] In the present application, the liquid cooling plate 110 is formed by extrusion, thereby forming the first plane 112 and the second plane 113 .

[0050] In addition, the first plane 112 and the second plane 113 are the surfaces with the largest areas in the liquid cooling plate 110 , so as to have a higher heat transfer efficiency.

[0051] In addition, the first plane 112 is a plane, so that the battery cells in thermal contact with the first plane 112 can be evenly transferred with heat, so as to evenly cool the battery cells on the corresponding side, thereby improving the safety and stability of the battery cells on the corresponding side during operation, and making the energy storage device operate more efficiently and reliably, so as to better meet the urgent demand for efficient thermal management solutions in the market and increase the service life of the battery cells and energy storage equipment.

[0052] Similarly, the second plane 113 is a plane, so that the battery cells in thermal contact with the second plane 113 can be evenly transferred with heat, so as to evenly cool the battery cells on the corresponding side, thereby improving the safety and stability performance of the battery cells on the corresponding side during operation, and making the energy storage device operate more efficiently and reliably, so as to better meet the urgent demand for efficient thermal management solutions in the market and increase the service life of the battery cells and energy storage equipment.

[0053] In this embodiment, the flow channel 111 has a first section 1111 and a second section 1113 arranged side by side and extending in the same direction, and the first section 1111 and the second section 1113 are connected, so that the coolant in the first section 1111 can flow to the second section 1113, and the coolant in the second section 1113 can flow to the first section 1111, thereby increasing the flow path of the coolant and thus increasing the residence time of the coolant in the flow channel 111, so that the cooling capacity of the coolant can be fully utilized.

[0054] In this embodiment, the first section 1111 is connected to the liquid inlet 1112, and the second section 1113 is connected to the liquid outlet 1114. Therefore, the coolant enters the first section 1111 through the liquid inlet 1112, flows through the second section 1113, and then flows out through the liquid outlet 1114.

[0055] In this embodiment, the liquid inlet 1112 and the liquid outlet 1114 are both provided on the first plane 112. It is understood that in other embodiments, the liquid inlet 1112 may also be provided on the second plane 113. Similarly, the liquid outlet 1114 may also be provided on the second plane 113.

[0056] Specifically, in this embodiment, the liquid cooling plate 110 has an inner cavity 114; inner cavity 114 includes a partition structure 115 that divides inner cavity 114 into a first section 1111 and a second section 1113. The length of partition structure 115 along the extension direction of first section 1111 or second section 1113 is less than the length of inner cavity 114 along the extension direction of first section 1111, thereby ensuring communication between first section 1111 and second section 1113.

[0057] The liquid cooling plate 110 has a first liquid cooling end 116 and a second liquid cooling end 117 along the extension direction of the first section 1111. Each of the first and second liquid cooling ends 116, 117 is provided with a sealing member 120. The sealing member 120 forms a closed flow channel 111 within the liquid cooling plate 110. In other words, the inner cavity 114 has openings at both ends, located at the first and second liquid cooling ends 116, 117, respectively. The sealing member 120 mates with the openings of the inner cavity 114 to form a closed flow channel 111.

[0058] In this embodiment, the two sealing members 120 have the same structure. It is understood that in other embodiments, the structures of the two sealing members may also be different.

[0059] Optionally, the length of the liquid cooling plate 110 along the direction in which the first section 1111 or the second section 1113 extends is greater than the width of the liquid cooling plate 110 along a direction perpendicular to the direction in which the first section 1111 or the second section 1113 extends. In other words, the length of the liquid cooling plate 110 is perpendicular to its width, and the length of the liquid cooling plate 110 is greater than its width; the direction in which the first section 1111 extends is parallel to the length of the liquid cooling plate 110. This allows the flow channel 111 to have a longer extension path, increasing the flow path of the coolant and thereby increasing the residence time of the coolant within the flow channel 111, thereby fully utilizing the cooling capacity of the coolant.

[0060] Specifically in this embodiment, the liquid cooling plate 110 is in the shape of a rectangular plate, and the length of the first section 1111 in the extending direction is the length direction of the liquid cooling plate 110, that is, Figure 3 The direction of the liquid cooling plate 110 perpendicular to the first section 1111 is the width direction of the liquid cooling plate 110, ie Figure 3 The first plane 112 and the second rear surface are perpendicular to the thickness direction of the liquid cooling plate 110. Of course, it is understood that in other embodiments, the extension direction of the first section 1111 is not limited to the length direction of the liquid cooling plate 110; accordingly, the direction perpendicular to the first section 1111 is not limited to the width direction of the liquid cooling plate 110.

[0061] In this embodiment, the flow channel 111 includes a first flow channel 111a and a second flow channel 111b arranged side by side, and the first flow channel 111a and the second flow channel 111b are not connected. In other words, the liquid cooling plate 110 includes two flow channels 111, and the two flow channels 111 are not connected. The two flow channels 111 are the first flow channel 111a and the second flow channel 111b. In this way, the first flow channel 111a and the second flow channel 111b are arranged. The first flow channel 111a and the second flow channel 111b can be used to carry out directional and zoned cooling of the battery cells as needed to meet the cooling needs of different areas.

[0062] It is understandable that in other embodiments, the number of flow channels 111 is not limited to two, but may be one, or more than two, and may be specifically set according to needs.

[0063] In this embodiment, the first flow channel 111a and the second flow channel 111b are arranged along the bb direction. It is understood that in other embodiments, the arrangement direction of the first flow channel 111a and the second flow channel 111b is not limited to this, and can also be arranged along other directions.

[0064] See also Figure 6 and Figure 7A battery cluster 1000 provided in one embodiment of the present application includes a battery pack 200 and a liquid cooling plate assembly 100 . The battery cell group of the battery pack 200 is in thermal contact with the first plane 112 or the second plane 113 of the liquid cooling plate 110 .

[0065] In the battery cluster 1000, the opposing first and second surfaces 112 and 113 of the liquid cooling plate 110 can both be used to cool the battery cells. This increases the surface area of ​​the liquid cooling plate 110 available for heat transfer with the battery cells, improving heat transfer efficiency. Given a certain cooling requirement, the smaller size of the liquid cooling plate 110 better meets the miniaturization requirements of both the battery cluster and the energy storage device.

[0066] In this embodiment, the cell groups of battery pack 200 include a first cell group 210 and a second cell group 220. The contact position between the first cell group 210 and the liquid cooling plate 110 corresponds to the first flow channel 111a. The coolant flowing through the first flow channel 111a is used to cool the first cell group 210. The contact position between the second cell group 220 and the liquid cooling plate 110 corresponds to the second flow channel 111b. The coolant flowing through the second flow channel 111b is used to cool the second cell group 220. As a result, the first cell group 210 and the second cell group 220 can each receive targeted cooling, preventing overheating of some cell groups and achieving uniform heat dissipation.

[0067] In this embodiment, the first battery cell group 210 includes multiple battery cells. It is understood that the number of battery cells in the first battery cell group 210 can be set according to specific needs, and can be one or more, and is not specifically limited here.

[0068] In this embodiment, the second battery cell group 220 has multiple battery cells. It is understandable that the number of battery cells in the second battery cell group 220 can be set according to specific needs, and can be one or more, and is not specifically limited here.

[0069] Specifically in this embodiment, battery pack 200 includes a first battery pack 230 and a second battery pack 240. A liquid cooling plate 110 is disposed between the first and second battery packs 230, 240. The bottom surface of the first battery pack 230 is in thermal contact with the first flat surface 112 of the liquid cooling plate 110, while the top surface of the second battery pack 240 is in thermal contact with the second flat surface 113 of the liquid cooling plate 110. This means that the liquid cooling plate 110 can cool both the first and second battery packs 230, 240 simultaneously.

[0070] In this embodiment, the battery cluster 1000 includes two battery packs 200. It is understood that in other embodiments, the number of battery packs in the battery cluster is not limited to two, but may be one or more than two.

[0071] In this embodiment, the bottom side of the second battery pack 240 is also provided with a liquid cooling plate assembly 100, and the bottom surface of the second battery pack 240 is in thermal contact with the first flat surface 112 of the bottom liquid cooling plate 110. It is understood that in other embodiments, the bottom side of the second battery pack may not be provided with a liquid cooling plate assembly.

[0072] In this embodiment, no liquid cooling plate assembly is provided on the top side of the first battery pack 230. It is understood that in other embodiments, a liquid cooling plate assembly may also be provided on the top side of the first battery pack, with the top surface of the first battery pack in thermal contact with the second flat surface of the liquid cooling plate on the top side.

[0073] Optionally, the battery cluster 1000 further includes a thermally conductive adhesive layer disposed between the liquid cooling plate 110 and the battery cell group to improve heat transfer efficiency between the battery pack 200 and the liquid cooling plate 110, thereby enhancing the cooling effect. Furthermore, the thermally conductive adhesive layer can also securely connect the liquid cooling plate 110 to the battery pack 200.

[0074] An embodiment of the present application further provides an energy storage device, which includes an energy storage cabinet and a battery cluster provided by any embodiment of the present application; the battery cluster is disposed in the energy storage cabinet.

[0075] It can be understood that in the various embodiments of the present application, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0076] It can be understood that the various implementation methods described in this application can be implemented individually or in combination, and the embodiments of this application are not limited to this.

[0077] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, devices and units can refer to the corresponding processes in the aforementioned method implementation methods and will not be repeated here.

[0078] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A liquid cooling plate assembly, characterized in that: It comprises an extruded liquid cooling plate; the liquid cooling plate has a flow channel and a complete first plane and a second plane; the first plane is arranged opposite to the second plane; the first plane is used to carry at least one battery cell and liquid-cool the battery cell it carries; the second plane is used to cover at least one battery cell and liquid-cool the battery cell it covers.

2. The liquid cooling plate assembly according to claim 1, wherein: The flow channel has a first section and a second section which are arranged side by side and extend in the same direction, and the first section and the second section are connected.

3. The liquid cooling plate assembly according to claim 2, wherein: The first section is connected to a liquid inlet, and the second section is connected to a liquid outlet.

4. The liquid cooling plate assembly according to claim 2, wherein: The liquid cooling plate has an inner cavity; the inner cavity has a partition structure that divides the inner cavity into the first section and the second section; The length of the spacing structure along the extending direction of the first segment or the second segment is smaller than the length of the inner cavity along the extending direction of the first segment, so that the first segment and the second segment are connected.

5. The liquid cooling plate assembly according to claim 2, wherein: The liquid cooling plate has a first liquid cooling end and a second liquid cooling end along the extension direction of the first section, and the first liquid cooling end and the second liquid cooling end are respectively provided with a sealing member; The sealing member forms a closed flow channel in the liquid cooling plate.

6. The liquid cooling plate assembly according to claim 2, wherein: A length of the liquid cooling plate along an extending direction of the first section or the second section is greater than a width of the liquid cooling plate along an extending direction perpendicular to the first section or the second section.

7. The liquid cooling plate assembly according to claim 1, wherein: The flow channel includes a first flow channel and a second flow channel arranged side by side, and the first flow channel and the second flow channel are not connected.

8. A battery cluster, characterized in that: Includes battery pack and liquid cooling plate assembly; The liquid cooling plate assembly includes an extruded liquid cooling plate having a flow channel and a complete first plane and a second plane. The first plane and the second plane are arranged opposite to each other. The first plane is used to support at least one battery cell and liquid-cool the battery cell supported by it. The second plane is used to cover at least one battery cell and liquid-cool the battery cell covered by it. The battery cell group of the battery pack is in thermal contact with the first plane or the second plane of the liquid cooling plate.

9. The battery cluster according to claim 8, characterized in that The flow channel includes a first flow channel and a second flow channel arranged side by side; The battery pack includes a first battery cell group and a second battery cell group. The contact position between the first battery cell group and the liquid cooling plate corresponds to the first flow channel, and the contact position between the second battery cell group and the liquid cooling plate corresponds to the second flow channel.

10. The battery cluster according to claim 9, characterized in that The battery pack includes a first battery pack and a second battery pack. The liquid cooling plate is provided between the first battery pack and the second battery pack. The bottom surface of the first battery pack is in thermal contact with the first plane of the liquid cooling plate, and the top surface of the second battery pack is in thermal contact with the second plane of the liquid cooling plate.

11. The battery cluster according to claim 8, characterized in that The battery cluster further includes a heat-conducting adhesive layer provided between the liquid cooling plate and the battery cell group.

12. The battery cluster according to claim 8, characterized in that The flow channel has a first section and a second section which are arranged side by side and extend in the same direction, and the first section and the second section are connected.

13. The battery cluster according to claim 12, characterized in that: The first section is connected to a liquid inlet, and the second section is connected to a liquid outlet.

14. The battery cluster according to claim 12, wherein: An inner cavity is provided in the liquid cooling plate; a partition structure is provided in the inner cavity, and the partition structure divides the inner cavity into the first section and the second section; The length of the spacing structure along the extending direction of the first segment or the second segment is smaller than the length of the inner cavity along the extending direction of the first segment, so that the first segment and the second segment are connected.

15. The battery cluster according to claim 12, characterized in that: The liquid cooling plate has a first liquid cooling end and a second liquid cooling end along the extension direction of the first section, and the first liquid cooling end and the second liquid cooling end are respectively provided with a sealing member; The sealing member forms a closed flow channel in the liquid cooling plate.

16. An energy storage device, characterized in that: It comprises an energy storage cabinet and the battery cluster according to any one of claims 8 to 15; the battery cluster is arranged in the energy storage cabinet.

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