Cooling structure and battery cluster

Abstract

The utility model provides a cooling structure and a battery cluster. The cooling structure comprises an end plate, an edge beam and a heat dissipation assembly. Wherein the two end plates are symmetrically arranged in parallel with each other; the two edge beams are symmetrically arranged in parallel, and the two ends of each edge beam are perpendicularly connected between the two end plates. The two edge beams extend to each other to form a supporting part, so as to support the two ends of the bottom of the battery cell in the length direction; and the heat dissipation assembly is attached to the bottom of the battery cell and is positioned between the two supporting parts. The battery cluster has the advantages of being simple in structure and convenient to install, and the production cost and the installation cost of the battery cluster can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices and related equipment, in particular to a cooling structure. The utility model also relates to a battery cluster including the above cooling structure. Background Art

[0002] In a conventional structure, energy storage battery cells are combined into battery cell modules, the battery cell modules are combined into battery packs, and the battery packs are combined into battery clusters. After two levels of degradation through the battery modules and battery packs, the overall volume utilization efficiency inside the battery cluster decreases significantly. In order to improve the energy storage density of the battery cluster, the CTC (Cell To Chassis) technology and CTB (Cell To Body) technology related to directly connecting battery cells to the battery cluster have been proposed. For the battery cluster adopting this structure, the battery cell modules inside are stacked in the height direction and share a cooling system, thereby achieving a higher volume utilization rate.

[0003] Currently, for the cooling solution of the above-mentioned battery cluster, a common aluminum extrusion large cold plate is arranged between the stacked battery cell modules. In terms of cooling performance, the aluminum extrusion large cold plate can fully meet the heat dissipation requirements of the battery cluster. However, the aluminum extrusion large cold plate has a large amount of aluminum material used, a complex processing technology, a high requirement for the installation accuracy of the fixing structure with the battery cluster frame, and a large amount of thermal conductive structural adhesive needs to be applied to achieve the fixation with the battery cell modules. This results in the high production cost and installation cost of the battery cluster adopting the cooling solution with the aluminum extrusion large cold plate.

[0004] In the prior art, there are related literatures reporting a technical solution that uses a cold pipe liquid cooling system to replace the aluminum extrusion large cold plate as the cooling system of the battery cluster. In order to prevent the middle part of the battery cells in the lower layer of the stacked battery cell modules from being deformed and cracked due to stress, pads need to be arranged at the bottom of the module. Therefore, the coolant pipes of the cold pipe liquid cooling system need to avoid the pads, and thus have to extend outside the frame. The coolant pipes extending outside the frame need to be bent and protected, increasing the complexity of the process and the production cost. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a cooling structure, which has the characteristics of simple structure and convenient installation, and can reduce the production cost and installation cost of the battery cluster.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A cooling structure of the utility model includes end plates, and two end plates are configured to be symmetrically arranged in parallel with each other;

[0008] Side beams, configured to be two that are arranged symmetrically and parallel to each other, and both ends are vertically connected between the two end plates; the two side beams extend towards each other to form support portions, constituting the support for both ends in the length direction of the bottom of the battery cell;

[0009] A heat dissipation assembly, disposed in contact with the bottom of the battery cell and located between the two support portions.

[0010] Further, the heat dissipation assembly includes a cold pipe, having a water inlet end and a water outlet end, and is configured to be in contact with the bottom of the battery cell and extend along an "S" shape in a tubular form;

[0011] Water nozzles, respectively installed at the water inlet end and the water outlet end, and are fixed on the end plates.

[0012] Further, the cold pipe is a flat pipe with an aspect ratio of the cross-section length to width of not less than 2.

[0013] Further, a relief groove is formed on the end plate, and the opening of the relief groove is consistent with the outer shape of the water nozzle, so that the bottom surface of the water nozzle assembled in the relief groove is coplanar with the bottom surface of the end plate.

[0014] Further, a tension bar is fixedly provided between the two end plates, and the tension bars are arranged symmetrically on the top surfaces of the end plates.

[0015] Compared with the prior art, the present utility model has the following advantages:

[0016] The cooling structure and battery cluster of the present utility model include end plates, side beams and a heat dissipation assembly. Among them, the frame structure composed of the end plates and side beams plays a role in supporting and positioning the installation of the battery cell and the heat dissipation assembly. The heat dissipation assembly can conduct the heat generated by the battery cell to the outside of the battery module or battery cluster, thereby keeping the working temperature of the battery cell within an appropriate range, ensuring the charge and discharge cycle times and service life of the battery cell. By forming support portions by the two side beams extending towards each other, it is possible to support both ends in the length direction of the bottom of the battery cell, avoiding the situation of the battery cell being pressed, and thus avoiding the use of cushion blocks. Since the heat dissipation assembly does not need to avoid the cushion blocks, it does not need to extend beyond the end plates and side beams. Compared with the aluminum extrusion large cold plate cooling structure and the liquid cooling pipe cooling structure extending beyond the frame in the prior art, the cooling structure in the present application has a low cost and is easy to install, which is beneficial to controlling the processing cost and installation cost of the battery cluster.

[0017] In addition, the heat dissipation component includes a cold pipe with a water inlet end and a water outlet end. By arranging the cold pipe in a tubular shape extending along an "S" shape, the contact area between the cold pipe and the battery cells can be effectively increased, enabling the heat generated by the battery cells to be smoothly conducted to the cold pipe. By installing nozzles at the water inlet end and the water outlet end of the cold pipe, not only can the connection between the cold pipe and the liquid cooling system be facilitated, but also the installation position of the cold pipe can be fixed. By setting the cold pipe as a flat pipe with a cross-sectional length-width ratio of not less than 2, while increasing the contact area between the cold pipe and the battery cells, the occupation of the cold pipe in the height direction of the battery cluster can be reduced, which is beneficial to further improving the energy density of the battery cluster.

[0018] Secondly, by opening a relief groove on the end plate, it can provide space for the installation of the heat dissipation component, reducing the occupation of the heat dissipation component in the height direction of the battery cluster, which is beneficial to further improving the energy density of the battery cluster.

[0019] Furthermore, by arranging a tension bar between the two end plates, the influence of the thermal expansion and deformation of the battery cells on the position of the end plate can be reduced, improving the stability of the limiting effect of the end plate on the battery cells.

[0020] In addition, the present utility model also proposes a battery cluster provided with the above cooling structure, including a cooling structure, adopting the cooling structure as described above, and being constructed as a plurality of stacked along its own height direction;

[0021] Battery cell monomers, being set as a plurality of arranged at intervals along their own thickness directions between the two end plates, the battery cell monomers being arranged parallel to the end plates, and the two support parts forming supports for both ends of the plurality of battery cell monomers in the length direction at the bottom.

[0022] Furthermore, rubber blocking strips are provided between both ends of the bottom of the battery cell monomers and the support parts.

[0023] Furthermore, an avoidance part is provided at one end of the support part away from the side beam, and the thickness of the avoidance part is less than the thickness of the support part.

[0024] Furthermore, limit pieces and limit grooves are provided on the end plates. When a plurality of the cooling structures are stacked, the limit pieces on the end plates are inserted into the limit grooves of another adjacent end plate to form limits in the length direction and the width direction.

[0025] Furthermore, when a plurality of the cooling structures are stacked, a support beam is fixedly provided between two adjacent side beams.

[0026] The cooling structure adopted by the battery cluster of the present utility model has the same beneficial effects as the above-described cooling structure compared to the prior art, and will not be elaborated herein.

[0027] In addition, by arranging rubber stoppers between the two ends of the bottom of the single battery cell and the supporting part, it is possible to block the structural adhesive used to fix the relative position between the single battery cell and the supporting part, prevent it from overflowing and solidifying and adhering to the side of the single battery cell, and prevent the phenomenon of battery leakage caused by the side adhesion of the single battery cell.

[0028] Furthermore, by arranging an avoidance part with a relatively small thickness at one end of the supporting part away from the side beam, it is possible to avoid the position of the tension bar on the premise of not affecting the supporting strength and stability of the supporting part for the single battery cell, and avoid the interference and collision between the tension bar and the supporting part when multiple cooling structures are stacked in the height direction.

[0029] Secondly, by arranging limit parts and limit grooves on the end plate, it is possible to limit the adjacent two cooling structures in the length and width directions of the battery cluster after multiple cooling structures and single battery cells in the battery cluster are stacked, improving the stability of the overall structure. The installation process is simple and easy to implement.

[0030] In addition, by arranging supporting beams between the side beams of the stacked multiple cooling structures, it is possible to further improve the overall structural strength and supporting stability of the battery cluster, which is beneficial to avoiding deformation or overturning of the battery cluster due to vibration or impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0032] Figure 1 is an exploded structural schematic diagram of the cooling structure in the embodiment of the present application;

[0033] Figure 2 is a structural schematic diagram of the end plate in the embodiment of the present application;

[0034] Figure 3 is a structural schematic diagram of the heat dissipation component in the embodiment of the present application;

[0035] Figure 4 is a structural schematic diagram of the battery cluster in the embodiment of the present application;

[0036] Figure 5 is a partial sectional structural schematic diagram of the battery cluster in the embodiment of the present application.

[0037] DESCRIPTION OF THE REFERENCE NUMERALS:

[0038] 1. End plate;

[0039] 101. Relief groove; 102. Tension bar; 103. Limit part; 104. Limit groove;

[0040] 2. Side beam;

[0041] 201. Support part;

[0042] 2011. Avoidance part;

[0043] 202. Support beam;

[0044] 3. Heat dissipation component;

[0045] 301. Cold pipe; 302. Water nozzle;

[0046] 4. Single battery cell;

[0047] 401. Glue blocking strip. Detailed implementation manner

[0048] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. To more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will describe the specific implementation manners of the present utility model with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained.

[0049] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] Taking a cooling structure and a battery cluster described in the present utility model as an example, the orientation words such as "upper, lower, left, right, front, rear" used in the embodiments are defined based on the up and down direction (also known as the height direction, or the Z direction of the battery cluster), the left and right direction (also known as the width direction, or the Y direction of the battery cluster), and the front and rear direction (also known as the length direction, or the X direction of the battery cluster) of the battery cluster. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, "inner" and "outer" defined based on the contour of the battery cluster, the side closer to the middle of the battery cluster is "inner", and vice versa is "outer".

[0051] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connection member" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0052] Next, reference will be made to the attached Figure 1 to the attached Figure 5 and in combination with embodiments to elaborate on the present utility model in detail.

[0053] Embodiment 1

[0054] This embodiment relates to a cooling structure, which realizes the support and limitation of the heat dissipation component and the battery cell by adopting a frame support structure formed by side beams and end plates. By arranging support parts on the side beams, the support for both ends of the bottom of the battery cell in the length direction is formed, avoiding the use of long strip-shaped pads. Therefore, there is no need to extend the heat dissipation component beyond the side beams and end plates to avoid the pads, so as to achieve the purpose of facilitating the installation process and reducing the installation cost. Compared with the existing technology using an aluminum extrusion large cold plate, the structure and process are simpler and the production cost is lower.

[0055] In terms of the overall structure, referring to Figure 1 and Figure 2 the cooling structure of this embodiment includes: end plates 1, side beams 2, and a heat dissipation component 3. The end plates 1 are arranged as two parallel and symmetrically distributed ones. The side beams 2 are vertically connected between the two end plates 1 and are located at one end near the bottom on the opposite side surfaces of the two end plates 1. The side beams 2 are arranged as two parallel and symmetrically distributed ones. Support parts 201 extend towards each other on the opposite side surfaces of the two side beams 2.

[0056] With the above arrangement, the two support parts 201 on the two side beams 2 can respectively support and limit both ends of the bottom of the battery cell in the length direction, thus replacing the long strip-shaped pads and realizing the position fixation of the battery cell. Since the use of long strip-shaped pads is avoided, there is no need to extend the heat dissipation component 3 beyond the side beams 2 and end plates 1 to avoid the pads, which has the advantages of simple structure and convenient installation, and can reduce the production cost and installation cost of the battery cluster.

[0057] Based on the above design concept, specifically, in this embodiment, referring to Figure 1 and Figure 2, the end plate 1 can be a rectangular metal plate. There are two end plates 1 which are arranged parallel and symmetrically to each other. The side beam 2 can be a rectangular hollow pipe in cross-section. The side beam 2 is connected between the two end plates 1 by welding. The side beam 2 is perpendicular to the plane where the end plate 1 is located. The connection positions of the two side beams 2 and the end plate 1 are at both ends of the end plate 1 near the bottom side. The two side beams 2 are arranged parallel and symmetrically to each other. The bottoms of the two side beams 2 extend towards each other, and a support portion 201 is formed by welding or integrally forming by sheet metal. The support portion 201 can be a long strip plate-like structure extending along the length direction of the side beam 2. The support portion 201 plays a role in supporting and limiting the battery cell.

[0058] In order to keep the operating temperature of the battery cell within a suitable range and discharge the heat generated by the battery cell. This application further includes a heat dissipation component 3. In this embodiment, referring to Figure 1 and Figure 3 , the heat dissipation component 3 includes a cold pipe 301 and a water nozzle 302. Among them, the cold pipe 301 can be an aluminum hollow pipe. The cold pipe 301 is arranged to fit the bottom of the battery cell. The cold pipe 301 is configured to extend and be arranged in an "S" shape along the bottom of the battery cell. In order to improve the heat dissipation efficiency of the cold pipe 301, the cold pipe 301 is configured as a flat pipe with an aspect ratio of length to width of not less than 2. By setting the cold pipe 301 as a flat pipe, the contact area between the cold pipe 301 and the battery cell can be increased, thereby improving the heat dissipation efficiency of the cold pipe 301, and reducing the occupation of the cold pipe 301 in the height direction, improving the overall space utilization rate and energy density. The cold pipe 301 is formed by continuously bending a flat pipe and is spliced by welding, with simple manufacturing process and small material consumption.

[0059] Referring to Figure 1 and Figure 3 , in this embodiment, the cold pipe 301 has an inlet end and an outlet end, and the coolant enters from the inlet end of the cold pipe 301, flows along the extending and arranging direction of the cold pipe 301, and flows out from the outlet end. Water nozzles 302 are installed at both the inlet end and the outlet end of the cold pipe 301. The water nozzle 302 includes a nozzle part sleeved on the cold pipe 301 and a mounting block covering the outside of the nozzle part. The mounting blocks of the two water nozzles 302 are installed on both sides of the bottom edge of the end plate 1 by bolt connection, so as to fix the heat dissipation component 3. In order to further improve the space utilization rate of this application, a relief groove 101 is opened at the bottom edge of the end plate 1. The shape of the relief groove 101 is the same as the outer shape of the mounting block of the water nozzle 302. When the heat dissipation component 3 is installed in the relief groove 101, the lower surface of the mounting block of the water nozzle 302 is coplanar with the lower surface of the end plate 1.

[0060] Referring to Figure 1, in this embodiment, for the purpose of improving the structural stability of the present application and preventing the end plate 1 from being misaligned after the battery cell expands due to heat, a tension bar 102 is installed on the upper surface of the end plate 1. The tension bar 102 can be a metal bar fixed to the upper surface of the end plate 1 by bolts at both ends. The tension bar 102 is arranged along a direction perpendicular to the two end plates 1. The tension bars 102 are arranged to be parallel to each other and symmetrically distributed on the upper surface of the end plate 1 in two. An insulating material layer is provided on the surface of the tension bar 102, and a heat-conducting structural adhesive is applied to the lower surface of the tension bar 102. The setting of the tension bar 102 plays a role in pulling and position-holding for the two end plates 1, and can improve the structural stability of the present application.

[0061] Embodiment 2

[0062] This embodiment relates to a battery cluster, including a plurality of cooling structures as described in Embodiment 1 and a plurality of battery cell monomers 4.

[0063] Referring to Figure 1 、 Figure 4 and Figure 5 , a plurality of cooling structures are stacked along their own height directions. To avoid interference and collision between various parts of the structure after the cooling structures are stacked and reduce the occupation in the height direction of the battery cluster, in this embodiment, an avoidance portion 2011 is provided on one side edge of the support portion 201 away from the side beam 2. The avoidance portion 2011 is a long strip plate-like structure similar in shape to the support portion 201. The thickness of the avoidance portion 2011 is less than that of the support portion 201, thereby forming an avoidance in the height direction of the battery cluster for the tension bar 102 and achieving the effect of avoiding interference and collision.

[0064] A plurality of battery cell monomers 4 are installed on each cooling structure. Referring to Figure 1 、 Figure 4 and Figure 5 , in order to enable the cooling structures equipped with a plurality of battery cell monomers 4 to maintain structural stability after being stacked, a limiting member 103 and a limiting groove 104 are provided on the end plate 1. In this embodiment, a limiting member 103 is provided on the upper surface of the end plate 1. The limiting member 103 can be a solid cylinder welded to the upper surface of the end plate 1. A limiting groove 104 is opened on the lower surface of the end plate 1. The limiting groove 104 is a groove whose opening position and size are adapted to the limiting member 103. In addition, a support beam 202 is also provided on the side beam 2. The support beam 202 can be a rectangular hollow pipe similar in structure to the side beam 2.

[0065] By adopting the above structure, when two or more cooling structures are stacked together, the limiting member 103 on the end plate 1 will be inserted into the limiting groove 104 of another adjacent end plate 1, thereby forming a position limitation along the length direction or width direction of the battery cluster. Both ends of the support beam 202 are respectively fixed between two adjacent side beams 2, which is used to limit the position of the side beam 2, improving the overall structural stability and load-bearing capacity of the present application.

[0066] It should be noted that the arrangement positions of the limiting member 103 and the limiting groove 104 in the present application do not constitute a limitation on the arrangement manner of the limiting member 103 and the limiting groove 104 in the present application. The limiting member 103 and the limiting groove 104 can also be set in other arrangement manners or other shapes that can achieve relative position limitation.

[0067] Refer to Figure 1 、 Figure 4 and Figure 5 As shown in, a plurality of battery cell monomers 4 are arranged at intervals with a certain gap along their own thickness directions between two end plates 1 in the cooling structure. In order to accommodate as many battery cell monomers 4 as possible between the end plates 1, the plane where the battery cell monomers 4 are located is parallel to the plane where the end plates 1 are located. The gap provided between the battery cell monomers 4 can reserve space for the thermal expansion of the battery cells.

[0068] Refer to Figure 1 、 Figure 4 and Figure 5 As shown in, in this embodiment, the battery cell monomers 4 and the support part 201 of the cooling structure are fixed by bonding with structural adhesive. In order to prevent the structural adhesive from overflowing to the side of the battery cell monomers 4, a glue-blocking strip 401 is provided between the bottom edge of the battery cell monomers 4 and the support part 201. The glue-blocking strip 401 can block the structural adhesive and prevent it from bonding to the side wall of the battery cell monomers 4, so that the side wall of the battery cell monomers 4 is stressed and cracked or leaks liquid.

[0069] Refer to Figure 1 、 Figure 4 and Figure 5, the heat dissipation component 3 is arranged between two supporting parts 201 and is attached to the bottoms of multiple battery cell monomers 4. In order to further improve the heat dissipation efficiency and stability of the heat dissipation component 3, in this embodiment, a thermally conductive structural adhesive layer is arranged between the heat dissipation component 3 and the bottoms of multiple battery cell monomers 4. The arrangement of the thermally conductive structural adhesive layer can improve the heat transfer efficiency from the battery cell monomers 4 to the heat dissipation component 3 and fix the heat dissipation component 3 at the bottoms of the battery cell monomers 4. A thermally conductive gel layer is arranged between the bottom of the heat dissipation component 3 and another adjacent battery cluster, and the thermally conductive gel layer can accelerate the heat conduction efficiency. After multiple cooling structures assemble the battery cell monomers 4 and stack them into a battery cluster, a set of heat dissipation components 3 can be added to the top of the end plate 1 for the cooling structure at the top of the battery cluster to improve the heat dissipation efficiency. The lower surface of the added heat dissipation component 3 at the top is coated with thermally conductive structural adhesive. By bonding the heat dissipation component 3 to the top of the battery cluster through the thermally conductive structural adhesive, the heat dissipation component 3 can fix and limit the top of the battery cluster to reduce the phenomenon of pole post deformation caused by the heat expansion of the battery cell monomers 4.

[0070] It should be noted that due to the structural properties, the heat dissipation at both ends of the battery cell monomer 4 is better. During actual operation, the working temperature at both ends of the battery cell monomer 4 is lower than the temperature in the middle of the battery cell monomer 4. The cold pipes 301 only need to be simply lapped with the parts at both ends of the battery cell monomer 4, and there is no need to set a thermally conductive gel layer. By adopting the above settings, the cooling contact area can be reduced, so that the temperatures of all parts of the battery cell monomer 4 tend to be consistent and the temperature difference is reduced.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cooling structure for cooling an electric core, characterized in that: It includes end plates, which are configured to be two arranged symmetrically and parallel to each other; Side beams, which are configured to be two arranged symmetrically and parallel to each other, and both ends are vertically connected between the two end plates; the two side beams extend towards each other to form a support portion, constituting the support for both ends of the electric core in the length direction of the bottom; A heat dissipation component, which is arranged in contact with the bottom of the electric core and is located between the two support portions.

2. The cooling structure according to claim 1, characterized in that: The heat dissipation component includes a cold pipe, which has a water inlet end and a water outlet end, and is configured to be in contact with the bottom of the electric core and extend along an "S" shape in a tubular form; Water nozzles, which are respectively installed at the water inlet end and the water outlet end, and are fixed on the end plates.

3. The cooling structure according to claim 2, characterized in that: The cold pipe is a flat pipe with an aspect ratio of the cross-section length to width of not less than 2.

4. The cooling structure according to claim 2, characterized in that: A relief groove is formed on the end plate, and the opening of the relief groove is consistent with the outer shape of the water nozzle, so that the bottom surface of the water nozzle assembled in the relief groove is coplanar with the bottom surface of the end plate.

5. The cooling structure according to any one of claims 1 to 4, characterized in that: A tension bar is fixedly arranged between the two end plates, and the tension bar is arranged as two symmetrically distributed on the top surface of the end plates.

6. A battery cluster, characterized in that: It includes a cooling structure, which adopts the cooling structure according to any one of claims 1 to 5, and is configured to be multiple stacked along its own height direction; Electric core monomers, which are arranged as multiple spaced apart in the thickness direction of themselves between the two end plates, the electric core monomers are arranged parallel to the end plates, and the two support portions form a support for both ends of the multiple electric core monomers in the length direction of the bottom.

7. The battery cluster according to claim 6, characterized in that: A glue blocking strip is provided between both ends of the bottom of the electric core monomer and the support portion.

8. The battery cluster according to claim 6, characterized in that: An avoidance portion is provided at one end of the support portion away from the side beam, and the thickness of the avoidance portion is less than the thickness of the support portion.

9. The battery cluster according to claim 6, characterized in that: Position-limiting members and position-limiting grooves are provided on the end plates. When multiple cooling structures are stacked, the position-limiting members on the end plates are inserted into the position-limiting grooves of another adjacent end plate to form position-limiting in the length direction and width direction.

10. The battery cluster according to claim 6, characterized in that: When multiple cooling structures are stacked, a support beam is fixedly arranged between two adjacent side beams.

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