Aluminum bar structure, cooling structure, battery module and battery pack

Abstract

The utility model provides an aluminum bar structure, a cooling structure, a battery module and a battery pack, the aluminum bar structure comprises an aluminum bar body, the aluminum bar body is provided with a battery cell wall used for connecting a battery cell, a wall part, opposite to the battery cell wall, in the aluminum bar body is provided with one or more protruding structures, and the protruding structures are equal in height; a cooling plate supporting wall is formed on the end wall, back on to the aluminum bar body, of the protruding structure and used for being attached to the wall face, facing the aluminum bar structure, of the cooling plate. The aluminum bar body is provided with the protruding structure which plays a role in supporting the cooling plate, the height of the protruding structure is set to be equal to the thickness of the needed heat conduction structural adhesive, accurate control over the thickness of the heat conduction structural adhesive is achieved in the pressing process of the cooling plate, the types of parts are reduced, the cooling structure is simplified, and the integration degree of the cooling structure is improved; the cost and the weight are reduced; in the pressing process of the cooling plate, the protruding structures are not prone to deformation, the thickness precision of the heat conduction structural adhesive is guaranteed, and the cooling efficiency and the structural strength of the cooling structure are improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to an aluminum bar structure, a cooling structure, a battery module and a battery pack. Background Art

[0002] In the cooling structure of a traditional battery module, the cooling plate and the aluminum bar structure are connected by a thermally conductive structural adhesive. The thermally conductive structural adhesive plays a role in heat transfer. The coolant in the cooling plate can take away the heat of the aluminum bar structure, playing a role in cooling the terminal post.

[0003] Among them, the thickness of the thermally conductive structural adhesive is a relatively key technical parameter, which is related to the cooling efficiency and structural strength of the cooling structure. In order to ensure the thickness of the thermally conductive structural adhesive, the current solution is to add a glue-limiting injection block on the blister tray. By designing the height of the glue-limiting injection block, the thickness of the thermally conductive structural adhesive between the cooling plate and the aluminum bar structure is ensured. The glue-limiting injection block is positioned and fixed through the heat riveting posts on the blister tray.

[0004] However, in the pressing process of the cooling plate in the current solution, the glue-limiting injection block and / or the blister tray may be deformed, resulting in a large deviation in the thickness of the thermally conductive structural adhesive, affecting the cooling efficiency and structural strength of the cooling structure, and seriously leading to battery thermal runaway and structural safety risks. Summary of the Utility Model

[0005] The purpose of the present application is to provide an aluminum bar structure, a cooling structure, a battery module and a battery pack to ensure the thickness accuracy of the thermally conductive structural adhesive.

[0006] To solve the above technical problems, the present application provides an aluminum bar structure, including an aluminum bar body. The aluminum bar body has a cell wall for connecting cells. One or more protruding structures are provided on the wall of the aluminum bar body opposite to the cell wall. The heights of the plurality of protruding structures are equal. The end wall of the protruding structure facing away from the aluminum bar body forms a cooling plate support wall, and the cooling plate support wall is used to fit with the wall surface of the cooling plate facing the aluminum bar structure.

[0007] In the aluminum bar structure of this embodiment, the aluminum bar body has at least one protruding structure, and the protruding structure plays a supporting role for the cooling plate. In practice, the height of the protruding structure can be set to be equal to the thickness of the required thermally conductive structural adhesive. During the forming process, the thermally conductive structural adhesive can be coated on the wall surface of the cooling plate facing the aluminum bar structure, and the thickness of the coated thermally conductive structural adhesive is not less than the height of the protruding structure. During the pressing process of the cooling plate, the cooling plate gradually moves towards the aluminum bar structure until the wall surface of the cooling plate facing the aluminum bar structure fits with the cooling plate support wall, and the cooling plate is supported by the cooling plate support wall. The thermally conductive structural adhesive is filled between the opposite wall surfaces of the cooling plate and the aluminum bar structure, and the distance between the opposite wall surfaces of the cooling plate and the aluminum bar structure is the height of the protruding structure. In this way, the thickness of the thermally conductive structural adhesive is equal to the height of the protruding structure, achieving precise control of the thickness of the thermally conductive structural adhesive.

[0008] It can be seen that in this embodiment, through the optimized design of the aluminum bar structure, precise control of the thickness of the thermally conductive structural adhesive is achieved, eliminating the glue-limiting injection molding block in the traditional solution, reducing the types of parts, simplifying the cooling structure, improving the integration degree of the cooling structure, and reducing costs and weight. At the same time, since the aluminum bar structure has greater structural strength compared with the traditional glue-limiting injection molding block and plastic suction tray, during the pressing process of the cooling plate, the protruding structure is not easily deformed, ensuring the thickness accuracy of the thermally conductive structural adhesive and improving the cooling efficiency and structural strength of the cooling structure.

[0009] Optionally, the height range of the protruding structure is 1 mm - 2 mm.

[0010] Optionally, the protruding structure is arranged at at least one end of the aluminum bar body in the length direction, and the protruding structure extends along the width direction of the aluminum bar body.

[0011] Optionally, the distance between the connection contour of the protruding structure and the corresponding outer edge of the aluminum bar body is greater than the thickness of the aluminum bar body.

[0012] Optionally, the protruding structure is an integral strip-shaped structure;

[0013] Or, the protruding structure includes a plurality of protruding parts, the extending directions of the protruding parts are the same, and the plurality of protruding parts are arranged at intervals in the extending direction.

[0014] Optionally, at both ends of the aluminum bar body in the width direction, there are folding parts that are folded towards the side away from the cell wall, and the end of the folding part away from the aluminum bar body forms a cooling plate abutting wall, and the cooling plate abutting wall is used to abut against the cooling plate.

[0015] Optionally, at least one of the folding parts is provided with an overflow groove.

[0016] The present application also provides a cooling structure, which includes the aforementioned aluminum bar structure and further includes a cooling plate. The aluminum bar structure and the cooling plate are connected by a thermally conductive structural adhesive, and the end wall of the protruding structure in the aluminum bar structure facing away from the aluminum bar body is in contact with the wall surface of the cooling plate facing the aluminum bar structure.

[0017] The cooling structure of the present application includes the aforementioned aluminum bar structure, and thus has the same technical effects as the aforementioned aluminum bar structure, which will not be elaborated herein.

[0018] The present application also provides a battery module, which includes a battery cell and the aforementioned cooling structure, and the aluminum bar structure in the cooling structure is connected to the pole post of the battery cell.

[0019] The battery module of the present application includes the aforementioned cooling structure, and thus has the same technical effects as the aforementioned cooling structure, which will not be elaborated herein.

[0020] The present application also provides a battery pack, which includes the aforementioned battery module.

[0021] The battery pack of the present application includes the aforementioned battery module, and thus has the same technical effects as the aforementioned battery module, which will not be elaborated herein. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the first specific embodiment of the aluminum bar structure provided by the present application;

[0023] Figure 2 is Figure 1 a partial enlarged view of the aluminum bar structure;

[0024] Figure 3 It is a transverse cross-sectional view of the first specific embodiment of the battery module provided by the present application;

[0025] Figure 4 is Figure 3 a top view of the battery module;

[0026] Figure 5 It is a schematic structural diagram of the second specific embodiment of the aluminum bar structure provided by the present application;

[0027] Figure 6 It is a transverse cross-sectional view of the second specific embodiment of the battery module provided by the present application;

[0028] Among them, Figures 1 - 6 the reference numerals in the

[0029] 1 - aluminum bar structure; 11 - aluminum bar body; 11b - battery cell wall; 12 - protruding structure; 12a - cooling plate support wall; 13 - folding part; 13a - glue overflow groove; 13A - cooling plate abutting wall; a - viewing hole; b - connection hole; 2 - battery cell; 3 - cooling plate. Detailed implementation manners

[0030] To enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Please refer to Figures 1 - 4 , Figure 1 which is a schematic structural diagram of the first specific embodiment of the aluminum bar structure provided by the present application; Figure 2 is Figure 1 a partial enlarged view of the aluminum bar structure; Figure 3 which is a transverse sectional view of the first specific embodiment of the battery module provided by the present application; Figure 4 is Figure 3 a top view of the battery module.

[0032] This embodiment provides an aluminum bar structure 1, including an aluminum bar body 11. The aluminum bar body 11 has a battery cell wall 11b for connecting a battery cell 2. One or more protruding structures 12 are provided on the wall portion of the aluminum bar body 11 opposite to the battery cell wall 11b. The heights of the multiple protruding structures 12 are equal. An end wall of the protruding structure 12 facing away from the aluminum bar body 11 forms a cooling plate support wall 12a, and the cooling plate support wall 12a is used to fit with the wall surface of the cooling plate 3 facing the aluminum bar structure 1.

[0033] In the aluminum bar structure 1 of this embodiment, the aluminum bar body 11 has at least one protruding structure 12, and the protruding structure 12 plays a supporting role for the cooling plate 3. In practice, the height of the protruding structure 12 can be set to be equal to the thickness of the required heat-conducting structural adhesive. During the forming process, the heat-conducting structural adhesive can be coated on the wall surface of the cooling plate 3 facing the aluminum bar structure 1 or the wall portion of the aluminum bar structure 1 facing the cooling plate 3, and the thickness of the coated heat-conducting structural adhesive is not less than the height of the protruding structure 12. During the pressing process of the cooling plate 3, the cooling plate 3 gradually moves in the direction close to the aluminum bar structure 1 until the wall surface of the cooling plate 3 facing the aluminum bar structure 1 fits with the cooling plate support wall 12a. The cooling plate 3 is supported by the cooling plate support wall 12a, and the heat-conducting structural adhesive is filled between the opposite wall surfaces of the cooling plate 3 and the aluminum bar structure 1. The distance between the opposite wall surfaces of the cooling plate 3 and the aluminum bar structure 1 is also the height of the protruding structure 12. In this way, the thickness of the heat-conducting structural adhesive is equal to the height of the protruding structure 12, realizing precise control of the thickness of the heat-conducting structural adhesive.

[0034] It can be seen that in this embodiment, by optimizing the design of the aluminum bar structure 1, precise control of the thickness of the thermal conductive structural adhesive is achieved, the glue-limiting injection molding block in the traditional solution is eliminated, the types of parts are reduced, the cooling structure is simplified, the integration degree of the cooling structure is improved, and the cost and weight are reduced. At the same time, since the aluminum bar structure 1 has greater structural strength compared with the traditional glue-limiting injection molding block and plastic suction tray, during the pressing process of the cooling plate 3, the protruding structure 12 is not easily deformed, ensuring the thickness accuracy of the thermal conductive structural adhesive and improving the cooling efficiency and structural strength of the cooling structure.

[0035] In practice, the thickness range of the thermal conductive structural adhesive is usually 1 mm - 2 mm. Therefore, in this embodiment, the height range of the protruding structure 12 is also 1 mm - 2 mm. For example, the height of the protruding structure 12 can be 1 mm, 1.5 mm, 2 mm, etc. When the height of the protruding structure 12 is 1 mm, the thickness of the thermal conductive structural adhesive is also 1 mm, and the thermal conductivity effect is the best while ensuring the bonding strength between the cooling plate 3 and the aluminum bar structure 1. When the height of the protruding structure 12 is 2 mm, the thickness of the thermal conductive structural adhesive is also 2 mm, and the bonding strength between the cooling plate 3 and the aluminum bar structure 1 is the highest while ensuring that the thermal conductivity effect meets the requirements. When the height of the protruding structure 12 is 1.5 mm, the thickness of the thermal conductive structural adhesive is also 1.5 mm, achieving a balance between the bonding strength and the thermal conductivity effect between the cooling plate 3 and the aluminum bar structure 1 and improving the quality of the cooling structure.

[0036] It can be seen from Figure 1 It can be seen that in this embodiment, the protruding structures 12 are arranged at both ends of the aluminum bar body 11 in the length direction, and the protruding structures 12 extend along the width direction of the aluminum bar body 11.

[0037] In this way, both of the two protruding structures 12 can play a supporting role for the cooling plate 3, improving the supporting stability of the cooling plate 3.

[0038] Combined with Figure 3 and Figure 4 It can be understood that the same cooling plate 3 cools multiple aluminum bar structures 1 arranged in the length direction at the same time, and the protruding structures 12 in each aluminum bar structure 1 can play a supporting role for the cooling plate 3. Therefore, in practice, it is also feasible to set the number of the protruding structures 12 in the aluminum bar structure 1 to be one, and the protruding structure 12 can be arranged at one end of the aluminum bar body 11 in the length direction.

[0039] In practice, the setting position of the protruding structure 12 is not limited to the above embodiments. For example, the protruding structure 12 is provided at at least one end in the width direction of the busbar body 11, and it is also feasible for the protruding structure 12 to extend along the length direction of the busbar body 11, which can also play a supporting role for the cooling plate 3. Of course, in the setting mode of this embodiment, the protruding structure 12 can avoid the weld position when the busbar structure 1 and the battery cell 2 are welded, so that the busbar structure 1 and the battery cell 2 have a larger welding area, improving the welding reliability of the busbar structure 1 and the battery cell 2, which is a more preferred technical solution.

[0040] In practice, if the protruding structure 12 is only provided at one end in the width direction of the busbar body 11, when the busbar structure 1 is installed on the battery cell 2, part of the busbar structure 1 in the length direction can be reversely arranged, that is, the protruding structure 12 in part of the busbar structure 1 is close to the middle of the battery module, and the protruding structure 12 in part of the busbar structure 1 is close to the end of the battery module. The protruding structures 12 in the length direction are not on the same straight line, improving the support stability for the cooling plate 3.

[0041] In short, in the busbar structure 1 of this embodiment, the protruding structure 12 can be provided at at least one end in the first direction of the busbar body 11, and the protruding structure 12 extends along the second direction of the busbar body 11, and the first direction and the second direction are perpendicular to each other.

[0042] Please continue to refer to Figure 1 , in this embodiment, the busbar body 11 includes two connecting parts connected along the length direction, and the two connecting parts are used to connect the pole columns of two adjacent battery cells 2, and each connecting part is provided with a protruding structure 12.

[0043] In practice, the busbar body 11 can include more than two connecting parts, and the same busbar structure 1 realizes the connection of more than two battery cells 2. At this time, the protruding structure 12 can be provided on any one or more connecting parts.

[0044] In this embodiment, the protruding structure 12 is a stamping structure formed by a stamping process, that is, the busbar body 11 and the protruding structure 12 are an integral structure, and the inside of the protruding structure 12 is a hollow structure with one end open.

[0045] In practice, it is also feasible that the busbar body 11 and the protruding structure 12 are a split structure. After the busbar body 11 and the protruding structure 12 are respectively formed, the protruding structure 12 is fixed to the second wall portion 11a of the busbar body 11 through processes such as welding.

[0046] It can be understood that in this embodiment, the protruding structure 12 is formed by a stamping process, with a simple structure and easy to form. Moreover, the inside of the protruding structure 12 is a hollow structure with one end open, which can reduce the weight of the busbar structure 1, which is a more preferred technical solution.

[0047] As Figure 1 shown, in this embodiment, each connecting portion is provided with a peephole a. When connecting the aluminum bar structure 1 and the pole column of the battery cell 2, the position of the pole column groove can be accurately found through the peephole a. When the contour of the peephole a coincides with the contour of the pole column groove, the pole columns of the aluminum bar structure 1 and the battery cell 2 are in a preset connection position. At this time, the conductive connection operation can be performed on the pole columns of the aluminum bar structure 1 and the battery cell 2.

[0048] In addition, as Figure 1 shown, in this embodiment, two connection holes b are provided at the connection position of the two connecting portions for the heat riveting posts of the blister tray to pass through, so as to realize the riveting of the aluminum bar structure 1 and the blister tray.

[0049] Furthermore, in this embodiment, the distance between the connection contour of the protruding structure 12 and the aluminum bar body 11 and the corresponding outer edge of the aluminum bar body 11 is greater than the thickness of the aluminum bar body 11.

[0050] From Figure 1 and Figure 2 it can be seen that in the width direction of the aluminum bar structure 1, the distances between the connection contour of the protruding structure 12 and the aluminum bar body 11 and the corresponding outer edge of the aluminum bar body 11 are L1 and L2 respectively; in the length direction of the aluminum bar structure 1, the distance between the connection contour of the protruding structure 12 and the aluminum bar body 11 and the corresponding outer edge of the aluminum bar body 11 is L3. Define the thickness of the aluminum bar body 11 as H, then L1 > H; L2 > H; L3 > H.

[0051] With the above settings, the stiffness of the protruding structure 12 can be improved, the feasibility of the stamping process can be satisfied, and the dimensional accuracy of the protruding structure 12 can be improved.

[0052] In practice, L1, L2 and L3 can be equal or unequal.

[0053] From Figure 1 it can be seen that in this embodiment, the protruding structure 12 is an integral strip-shaped structure.

[0054] In practice, the protruding structure 12 can also be a split structure. Specifically, the protruding structure 12 includes a plurality of protruding portions. The extending directions of the protruding portions are the same, and the plurality of protruding portions are arranged at intervals along the extending direction. In this way, during the pressing process of the cooling plate 3, the thermally conductive structural adhesive can overflow directionally between two adjacent protruding portions, preventing the thermally conductive structural adhesive from overflowing randomly and affecting the safety of some components in the battery module.

[0055] It can be understood that during the pressing process of the cooling plate, the thermal conductive structural adhesive will inevitably overflow. If the thermal conductive structural adhesive overflows onto the low-voltage parts of the battery connection system, it is extremely easy to cause damage to the low-voltage parts, and seriously, it will lead to the failure of voltage and temperature acquisition, affecting the safety of the entire package. Therefore, in order to achieve directional glue overflow, the current solution is to use two glue-blocking foams. The glue-blocking foams are pasted on the wall of the cooling plate facing the aluminum bar structure and are located on both sides in the width direction of the aluminum bar structure. The glue-blocking foams have glue overflow grooves. In this way, during the pressing process of the cooling plate, the thermal conductive structural adhesive can only overflow directionally from the inside of the glue overflow grooves. By designing the setting position of the glue overflow grooves, it is possible to avoid the thermal conductive structural adhesive from overflowing onto the low-voltage parts of the battery connection system and ensure the safety of the low-voltage parts.

[0056] However, this method of using a separate glue-blocking foam to block the glue increases the types of parts, has a complex structure, reduces the integration of the entire cooling structure, and significantly increases the cost and weight.

[0057] Based on this, please refer to Figures 5 - 6 , Figure 5 which is a schematic structural diagram of the second specific embodiment of the aluminum bar structure provided by this application; Figure 6 which is a cross-sectional view of the second specific embodiment of the battery module provided by this application in the horizontal direction.

[0058] In this embodiment, folding parts 13 that are folded to the side away from the cell wall 11b are provided at both ends of the aluminum bar body 11 in the width direction. The height of the folding parts 13 is equal to the height of the protruding structure 12. The end wall of the folding part 13 far from the aluminum bar body 11 forms a cooling plate abutting wall 13A, and the cooling plate abutting wall 13A is configured to be attached to the wall of the cooling plate 3 facing the aluminum bar structure 1.

[0059] With the above settings, in this embodiment, the folding parts 13 can play a role in blocking the glue during the pressing process of the cooling plate 3, avoiding the thermal conductive structural adhesive from overflowing onto the low-voltage parts of the battery connection system and ensuring the safety of the low-voltage parts; at the same time, in this embodiment, there is no need to separately set a glue-blocking foam, further reducing the types of parts, having a simple structure, improving the integration of the entire cooling structure, and significantly reducing the cost and weight. In addition, the wall of the cooling plate 3 facing the aluminum bar structure 1 can be attached to the cooling plate abutting wall 13A and the cooling plate supporting wall 12a at the same time, and the folding parts 13 play an auxiliary supporting role for the cooling plate 3, further improving the installation stability of the cooling plate 3.

[0060] Furthermore, in this embodiment, glue overflow grooves 13a are provided on both folding parts 13.

[0061] Thus, the folding portion 13 can also play a role in directional glue overflow, enabling the excess thermal conductive structural adhesive to overflow directionally inside the glue overflow groove 13a, ensuring that the thermal conductive structural adhesive has a preset thickness. At the same time, by designing the setting position of the glue overflow groove 13a, it is possible to prevent the thermal conductive structural adhesive from overflowing onto the low-voltage components of the battery connection system, ensuring the safety of the low-voltage components.

[0062] In this embodiment, both folding portions 13 are provided with glue overflow grooves 13a, and the excess thermal conductive structural adhesive can overflow from both sides simultaneously, improving the glue overflow efficiency. In practice, it is also feasible to provide the glue overflow groove 13a in at least one of the folding portions 13, ensuring the structural strength of the aluminum bar body 11 while achieving the glue overflow effect.

[0063] At the same time, in this embodiment, the number of glue overflow grooves 13a provided in each folding portion 13 is two, and the excess thermal conductive structural adhesive can overflow from the four glue overflow grooves 13a simultaneously, further improving the glue overflow efficiency. In practice, the number of glue overflow grooves 13a provided in the folding portion 13 can be at least one, ensuring the structural strength of the aluminum bar body 11 while achieving the glue overflow effect.

[0064] In this embodiment, the height of the folding portion 13 is equal to the height of the protruding structure 12, and the cooling plate abutting wall 13A and the wall surface of the cooling plate 3 facing the aluminum bar structure 1 are fitted. In practice, it is also feasible that the height of the folding portion 13 is greater than the height of the protruding structure 12. At this time, the distance between the two folding portions 13 needs to be increased. After the cooling plate 3 is assembled, the inner wall of the end of the folding portion 13 far from the aluminum bar body 11 and the corresponding side wall in the width direction of the cooling plate 3 are fitted, and part of the cooling plate 3 is located between the two folding portions 13.

[0065] It should be noted that the side walls of the two folding portions 13 facing each other are defined as "inner walls" here.

[0066] From Figure 4 and Figure 6 it can be seen that in this embodiment, the cooling plate 3 has a harmonica tube structure, extending the cooling path and improving the cooling effect.

[0067] This application also provides a cooling structure, including the aforementioned aluminum bar structure 1, and further including a cooling plate 3. The aluminum bar structure 1 and the cooling plate 3 are connected by a thermal conductive structural adhesive, and the end wall of the protruding structure 12 in the aluminum bar structure 1 facing away from the aluminum bar body 11 and the wall surface of the cooling plate 3 facing the aluminum bar structure 1 are fitted.

[0068] The cooling structure of this application includes the aforementioned aluminum bar structure 1, and thus has the same technical effects as the aforementioned aluminum bar structure 1, which will not be elaborated here.

[0069] This application also provides a battery module, including a battery cell 2 and the aforementioned cooling structure, and the aluminum bar structure 1 in the cooling structure is connected to the pole post of the battery cell 2.

[0070] The battery module of the present application includes the aforementioned cooling structure, and thus has the same technical effects as the aforementioned cooling structure, which will not be elaborated here.

[0071] The present application also provides a battery pack, including the aforementioned battery module.

[0072] The battery pack of the present application includes the aforementioned battery module, and thus has the same technical effects as the aforementioned battery module, which will not be elaborated here.

[0073] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An aluminum bar structure, characterized in that, It includes an aluminum bar body (11), the aluminum bar body (11) has a battery cell wall (11b) for connecting a battery cell (2), one or more protruding structures (12) are provided on a wall portion of the aluminum bar body (11) opposite to the battery cell wall (11b), the heights of the plurality of protruding structures (12) are equal, an end wall of the protruding structure (12) facing away from the aluminum bar body (11) forms a cooling plate support wall (12a), and the cooling plate support wall (12a) is used to fit with a wall surface of the cooling plate (3) facing the aluminum bar structure (1).

2. The aluminum bar structure according to claim 1, characterized in that, The height range of the protruding structure (12) is 1 mm - 2 mm.

3. The aluminum bar structure according to claim 1, wherein The protruding structure (12) is provided at at least one end in the length direction of the aluminum bar body (11), and the protruding structure (12) extends along the width direction of the aluminum bar body (11).

4. The aluminum bar structure according to claim 1, characterized in that, The distance between the connection contour of the protruding structure (12) and the corresponding outer edge of the aluminum bar body (11) is greater than the thickness of the aluminum bar body (11).

5. The aluminum bar structure according to any one of claims 1-4, characterized in that, The protruding structure (12) is an integral strip-shaped structure; Or, the protruding structure (12) includes a plurality of protruding parts, the extending directions of the protruding parts are the same, and the plurality of protruding parts are arranged at intervals in the extending direction.

6. The aluminum bar structure according to any one of claims 1-4, characterized in that, Folding parts (13) that are folded towards a side away from the battery cell wall (11b) are provided at both ends in the width direction of the aluminum bar body (11), and one end of the folding part (13) away from the aluminum bar body (11) is configured to abut against the cooling plate (3).

7. The aluminum bar structure according to claim 6, wherein At least one of the folding parts (13) is provided with a glue overflow groove (13a).

8. The aluminum bar structure according to claim 6, characterized in that, The height of the folding part (13) is equal to the height of the protruding structure (12), an end wall of one end of the folding part (13) away from the aluminum bar body (11) forms a cooling plate abutting wall (13A), and the cooling plate abutting wall (13A) is used to fit with a wall surface of the cooling plate (3) facing the aluminum bar structure (1).

9. A cooling structure, characterized in that, It includes the aluminum bar structure (1) according to any one of claims 1 - 8, and further includes a cooling plate (3), the aluminum bar structure (1) and the cooling plate (3) are connected by a thermally conductive structural adhesive, and an end wall of the protruding structure (12) in the aluminum bar structure (1) facing away from the aluminum bar body (11) fits with a wall surface of the cooling plate (3) facing the aluminum bar structure (1).

10. A battery module, characterized in that, It includes a battery cell (2) and the cooling structure according to claim 9, and the aluminum bar structure (1) in the cooling structure is connected to a pole column of the battery cell (2).

11. A battery pack, characterized in that, It includes the battery module according to claim 10.

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