Battery cell connection assembly, battery module, battery pack, and electric device

Abstract

The utility model discloses a kind of electric core connecting assembly, battery module, battery pack and electric device. The electric core connecting assembly includes: first support, the first support is provided with first connecting hole;Tab connector, be in the first connecting hole, wherein, when the electric core connecting assembly is used for electric core connection, the tab connector is detachably connected with electric core tab;Connecting bar sheet, the connecting bar sheet is set to the side of the tab connector away from the electric core tab and is electrically connected with the tab connector;Second support, the second support is detachably connected with the first support by support fixed mechanism and exposes at least a part of the connecting bar sheet. The electric core connecting assembly of the utility model can realize electric core quick disassembly and replacement.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell connection device, a battery module, a battery pack, and an electrical device. Background Technology

[0002] With the rapid development of new energy vehicles, the maintenance of small power battery packs has received increasing attention. In existing technologies, the cell connections in small power battery packs are typically made by welding. This makes it difficult to individually disassemble and replace damaged cells, limiting the flexibility of the battery pack and increasing maintenance and replacement costs. Furthermore, the process of stripping and re-welding welded connections can even affect the overall performance and safety of the battery pack, necessitating a complete replacement and resulting in resource waste.

[0003] Therefore, there is an urgent need in the market for a new type of battery pack structure that can simplify the cell replacement process, reduce maintenance costs, and improve battery pack reliability. Utility Model Content

[0004] Therefore, this utility model provides a cell connection assembly, a battery module, a battery pack, and an electrical device to solve or at least alleviate at least one of the above-mentioned problems.

[0005] According to one aspect of the present invention, a battery cell connection assembly is provided, comprising:

[0006] A first bracket, wherein a first connection hole is provided on the first bracket;

[0007] A tab connector is disposed in the first connection hole, wherein when the cell connection assembly is used for cell connection, the tab connector is detachably connected to the cell tab;

[0008] A connecting plate is provided on the side of the electrode connector away from the battery cell electrode and is electrically connected to the electrode connector;

[0009] The second bracket is detachably connected to the first bracket via a bracket fixing mechanism and exposes at least a portion of the connecting plate.

[0010] This utility model discloses a cell connection assembly comprising a first bracket, a tab connector, a connecting plate, and a second bracket. Since the first bracket and the second bracket are detachably connected, and when the cell connection assembly is used for cell connection, the tab connector is detachably connected to the cell tab. Therefore, for battery modules assembled using this cell connection assembly, rapid disassembly and replacement of individual cells can be achieved. This significantly improves the maintenance efficiency of battery modules and battery packs, and reduces maintenance time and costs.

[0011] Optionally, the tab connector includes a body and a first connecting portion disposed on top of the body. The body is installed in the first mounting hole, the first connecting portion is located on one side of the first mounting surface of the first bracket, and the structure of the body on the second mounting surface of the first bracket is adapted to be detachably connected to the battery cell tab. Through this structural design of the tab connector, a detachable connection between the tab connector and the battery cell tab can be achieved.

[0012] Optionally, the second bracket is provided with a clearance hole corresponding to the connecting strip, for exposing at least a portion of the connecting strip. This clearance hole design allows the connecting strip to be exposed, facilitating its electrical connection to the corresponding circuit structure.

[0013] Optionally, in this cell connection assembly, the first bracket further includes a mounting base disposed on the inner wall of the first connection hole, and the electrode connector further includes rotating shafts disposed on both sides of the body. The rotating shafts are adapted to the mounting base and can rotate within the mounting base. Obviously, by adopting this structure in which the electrode crimping plate is rotatably connected to the first bracket, compared to the method of fixing the electrode crimping plate, it is more conducive to the quick disassembly and replacement of the cell.

[0014] Optionally, the first connecting hole is rectangular, and one of its two sidewalls without the mounting base is a first overlapping surface suitable for overlapping. The body of the tab connector has a second overlapping surface adapted to the first overlapping surface. In use, the first overlapping surface and the second overlapping surface form an overlapping connection. By adopting this overlapping connection structure, it can be further ensured that the position of the tab connector remains fixed in the normal working state of the battery module, thereby improving the reliability of the battery module.

[0015] Optionally, the first connecting part includes a bolt post, and the connecting plate is provided with corresponding bolt mounting holes. The connecting plate is sleeved on the bolt post and fixed by a connecting nut. The tightening action of the bolt post and the connecting nut enhances the reliability of the electrical connection between the connecting plate and the electrode connector, reducing safety hazards caused by poor contact.

[0016] Optionally, the detachable connection between the structure of the body located on one side of the second mounting surface and the battery cell tab includes crimping. Using a tab crimping plate to crimp the battery cell tab instead of the traditional welding method can avoid circuit connection problems caused by poor welding, thus improving the reliability and stability of the circuit connection.

[0017] Optionally, the shape of the relief hole matches the shape of the corresponding connecting plate, and the area of ​​the relief hole is smaller than the area of ​​the connecting plate. Because the area of ​​the relief hole is smaller than the area of ​​the connecting plate, an interference fit is achieved, thereby ensuring a tight press-fit of the electrode clamping plate below the connecting plate and the stability of the cell connection assembly structure.

[0018] Another aspect of this utility model provides a battery module comprising: at least two battery cells and a battery cell connection assembly for electrically connecting the battery cells, wherein the battery cell connection assembly is a battery cell connection assembly as described in any of the preceding claims.

[0019] Optionally, the battery module further includes a module end plate and an isolation pad. The module end plate is perpendicularly arranged to the cell connection assembly, the cells are arranged in parallel between the module end plates, and an isolation pad is provided between any two adjacent cells.

[0020] According to another aspect of the present invention, a battery pack is provided, comprising a housing and a battery module disposed within the housing, wherein the battery module is the battery module as described in any of the preceding claims.

[0021] According to another aspect of the present invention, an electrical device is provided, which includes the battery pack described above.

[0022] The cell connection assembly according to the present invention has the characteristic of easy disconnection and replacement when individual cells are damaged, which can improve the efficiency of cell maintenance. The battery module, battery pack, and power-consuming device according to the present invention also have the above advantages. Attached Figure Description

[0023] To achieve the foregoing and related objectives, certain illustrative aspects are described herein in conjunction with the following description and accompanying drawings. These aspects indicate various ways in which the principles disclosed herein may be practiced, and all aspects and their equivalents are intended to fall within the scope of the claimed subject matter. The foregoing and other objectives, features, and advantages of this disclosure will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings. Throughout this disclosure, the same reference numerals generally refer to the same parts or elements.

[0024] Figure 1 This is a first-view structural schematic diagram of a cell connection assembly 100 according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the first bracket of the cell connection assembly 100 according to an embodiment of the present invention;

[0026] Figure 3This is a first-view structural schematic diagram of the tab connector of the cell connection assembly 100 according to an embodiment of the present utility model;

[0027] Figure 4 This is a second-view structural schematic diagram of the tab connector of the cell connection assembly 100 according to an embodiment of the present utility model;

[0028] Figure 5 This is a second-view structural schematic diagram of a cell connection assembly 100 according to an embodiment of the present invention;

[0029] Figure 6 This is a third-view structural schematic diagram of a cell connection assembly 100 according to an embodiment of the present invention;

[0030] Figure 7 This is a fourth-view structural schematic diagram of a cell connection assembly according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of a battery module according to an embodiment of the present invention.

[0032] Figure label:

[0033] 100. Cell connection assembly; 110. First bracket; 120. Electrode connector; 130. Connecting tab; 140. Second bracket; 111. First connecting hole; 112. First mounting surface; 113. Second mounting surface; 122. Body; 121. First connecting part; 141. Clearance hole; 1111. First overlapping surface; 1112. Mounting hole; 123. Rotating shaft; 124. Second overlapping surface; 150. Connecting nut; 131. Positive electrode tab; 132. Negative electrode tab; 133. Series tab; 160. Bracket fixing mechanism; 200. Battery module; 210. Cell; 220. Module end plate; 230. Insulating gasket. Detailed Implementation

[0034] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0035] According to some embodiments of this utility model, a battery cell connection assembly is provided, which will be described below in conjunction with... Figure 1-7 This is to provide an explanation. To avoid misunderstanding, it should be specifically noted that the accompanying drawings in the instruction manual... Figure 1 , Figure 6 and Figure 7In addition to the cell connection assembly, other components such as the cell, module end plate, and isolation pad are also schematically shown. These components are not part of the cell connection assembly.

[0036] like Figures 1 to 3 As shown, a cell connection assembly 100 according to an embodiment of the present invention is used to form a battery module with a cell assembly, including a first bracket 110, a plurality of tab connectors 120, a connecting plate 130 and a second bracket 140.

[0037] like Figure 2 As shown, the first bracket 110 is rectangular and has a plurality of first connecting holes 111, which are also rectangular. Both the first bracket 110 and the first connecting holes 111 can adopt other suitable shapes. In this embodiment, the first connecting holes 111 are exemplarily arranged in two rows, each corresponding to the other. Each first connecting hole 111 has a corresponding mounting base 1112 on its two opposite sidewalls for mounting the electrode connector 120. The first bracket 110 includes a first mounting surface 112 and a second mounting surface 113 opposite to it, wherein the second mounting surface 112 is typically the mounting surface directly facing the battery cell.

[0038] like Figures 3 to 4 As shown, the tab connector 120 includes a body 122, a first connecting portion 121 disposed on the upper part of the body 122, and rotating shafts 123 disposed on both sides of the body 122. The rotating shafts 123 are adapted to the mounting base 1112 of the first connecting hole 111. The first connecting portion 121 is used to connect with the connecting tab. The tab connector 120 can be installed in the first connecting hole 111. Specifically, the rotating shaft 123 of the tab connector 120 is installed in the mounting base 1112 of the first connecting hole 111 and can rotate within the mounting base 1112, allowing the tab connector 120 to rotate with the rotating shaft 123. This allows for adjustment of the orientation of the body 122 within a certain range during connection with the battery cell tab, facilitating the connection between the tab connector 120 and the battery cell tab. The state of the tab connector 120 after installation in the first connecting hole 111 is as follows. Figure 5 and Figure 6As shown. Exemplarily, each first connecting hole 111 may have two mounting seats 1112 facing each other, one of which is a circular mounting hole and the other is an openable and closable mounting seat with a locking device, so as to facilitate the quick installation and removal of the rotating shaft 123, thereby realizing the quick installation and removal of the electrode connector 120. The mounting seat 1112 may also adopt various other feasible structures, which are not limited here. When the battery cell connection assembly of this utility model is in use (i.e., in the installation state), the side of the body 122 of the electrode connector 120 without the first connecting part 121 is located on the side of the second mounting surface 113 of the first bracket 110, for connecting with the battery cell electrode; the first connecting part 121 is located on the side of the first mounting surface 112, for connecting with the connecting bar 130. In this embodiment of the utility model, the connection between the body 122 of the electrode connector 120 and the battery cell electrode is a detachable connection, rather than the welding method commonly used in the prior art for battery cell connection. In one specific implementation, the detachable connection between the body 122 and the cell tab is achieved by pressing the side of the body 122 facing the cell tab against the electrode tab. In another specific implementation, a connection terminal is formed on the side of the body 122 facing the cell tab, and this connection terminal is connected to the electrode tab via a wire connector. This invention does not limit the detachable connection method and various feasible detachable connection methods can be adopted. Besides the aforementioned exemplary structures, the tab connector 120 of this invention can also adopt various other feasible structures, as long as the tab connector and the cell tab are detachably connected when the cell connection assembly is used for cell connection, i.e., in a battery module.

[0039] In this embodiment of the invention, since the connection between the body 122 of the tab connector 120 and the cell tab is detachable, when an individual cell in the battery module is damaged, the cell can be quickly removed and replaced, avoiding the need to replace the entire battery module or even the entire battery pack due to the damage of a single cell, thus avoiding cost and resource waste. Furthermore, the structure of this invention allows for a rotatable connection between the tab pressing plate and the first bracket, enabling rapid disassembly and replacement of the cell, significantly improving battery pack maintenance efficiency and reducing maintenance time and costs. In addition, by adding the tab connector 120, this embodiment connects the cell tab to external circuits such as connecting plates, which improves the operability of circuit connection work compared to directly connecting the relatively thin cell tab to external circuits.

[0040] like Figure 7As shown in the embodiment of this utility model, the connecting bar 130 typically includes a positive electrode bar 131, a negative electrode bar 132, and a series-parallel connecting bar 133. The positive electrode bar 131 is used to connect to the positive electrode of the battery cell, the negative electrode bar 132 is used to connect to the negative electrode of the battery cell, and the series-parallel connecting bar 133 is used to connect the electrodes of different battery cells in series or parallel. The connecting bar 130 is connected to the first connecting portion 121 of the tab connector 120 on one side of the first mounting surface 112 of the first bracket 110, thereby realizing the series or parallel connection of the battery cells. Since each tab connector 120 connects to one battery cell tab, when removing and replacing the battery cell, the battery cell can be stripped by disconnecting the tab connector 120 from the connecting bar 130, facilitating battery cell replacement and maintenance. Typically, the connecting bar 130 is made of copper; in other examples, it can also be made of aluminum or a copper-aluminum composite bar. The connecting plate 130 can be rectangular, square or other feasible shapes, and is not limited here.

[0041] like Figure 1 As shown, in this embodiment, the second bracket 140 includes a bracket body and a clearance hole 141 disposed on the bracket body and corresponding to the position of the connecting tab 130. The clearance hole 141 is used to expose at least a portion of the connecting tab 130. The portion of the connecting tab 130 exposed by the clearance hole 141 is typically the portion intended to be exposed according to the design, and can be specifically determined according to the design requirements of the battery module. Furthermore, in one specific example, in the installed state, the second bracket 140 covers the edge area of ​​the corresponding connecting tab 130, exposing only the middle area of ​​the connecting tab 130. For example, the shape of the clearance hole is consistent with the corresponding connecting tab, but the area of ​​the clearance hole is slightly smaller than the area of ​​the connecting tab, thereby achieving an interference fit. In another specific example, the thickness of the connecting tab 130 is set to be slightly thicker than the thickness of the second bracket, thereby achieving an interference fit between the connecting tab 130 and the second bracket 140. This interference fit ensures the tightness of the lower electrode contact and the stability of the cell connection assembly structure.

[0042] In this embodiment, the second bracket 140 is detachably connected to the first bracket 110 via a bracket fixing mechanism 160, such as... Figure 1 As shown. The bracket fixing mechanism 160 can employ various feasible detachable connection structures to facilitate the disassembly and installation of the second bracket 140 and the first bracket 110. In one specific example, the bracket fixing mechanism 160 is a bolt that passes through both the first and second brackets and is secured by a nut. In another specific example, the bracket fixing mechanism 160 can be a snap-fit ​​structure. The connection is used to tighten the connecting plate 130 and the electrode clamping plate located below it.

[0043] According to one embodiment of the present invention, such as Figure 2-4 As shown, the tab connector 120 and the first connecting hole 111 can also be connected by an inclined overlapping method. In this embodiment, the projection of the tab connector 120 on the first bracket is rectangular, the first connecting hole 111 is a rectangular through hole, and one of its sidewalls is inclined (i.e., not perpendicular to the first mounting surface 112). This sidewall is the first overlapping surface 1111, and the other sidewalls are perpendicular to the first mounting surface 112, so that the opening of the first connecting hole 111 on the first mounting surface 112 is larger than the opening on the second mounting surface 113. The tab connector 120 is provided with a second overlapping surface 124 corresponding to the first overlapping surface 1111. When the tab connector 120 is connected to the first connecting hole 111, the second overlapping surface 124 of the tab connector 120 overlaps the first overlapping surface 1111 of the first connecting hole 111. The side of the body 122 of the tab connector 120 without the first connecting portion 121 is exposed on the second mounting surface 113 of the first bracket 110 for connection with the battery cell tab. The first connecting portion 121 is exposed on the first mounting surface 112 for connection with the connecting tab 130. In this inclined overlapping scheme, one way to connect the other side of the tab connector 120 to the first connecting hole is that the rotating shaft 123 of the tab connector 120 is installed in the mounting base 1112 of the first connecting hole 111 and can rotate within the mounting base 1112. Another way to install the other side of the tab connector 120 to the first connecting hole is that the other side of the tab connector 120 abuts against the inner wall of the first connecting hole 111, omitting the rotating shaft 123 and the mounting base 1112. Both installation methods have the advantages of simple connection structure, convenient disassembly, easy peeling of the tab connector 120, and thus convenient battery cell disassembly and replacement. Furthermore, by adopting the inclined overlap method and simultaneously using the rotating shaft 123 of the electrode connector 120 to be rotatably connected to the mounting base 1112 of the first connection hole 111, the position of the body 122 can be adjusted within a certain range due to the rotatable connection between the electrode pressing plate and the first bracket, enabling quick disassembly and replacement of the battery cell. Moreover, due to the inclined overlap method, the electrode connector 120 is more likely to remain stable and not shake during operation.

[0044] According to one embodiment of this utility model, the first connecting portion 121 of the tab connector 120 is configured as a bolt post. When the tab connector 120 is installed in the first connecting hole 111, the bolt post is perpendicular to the first mounting surface 112. The connecting tab 130 is provided with a second mounting hole corresponding to the bolt post. The connecting tab 130 is connected to the first connecting portion 121 through the second mounting hole using a connecting nut 150, so that the battery cells connected to the tab connector 120 are electrically connected through the connecting tab 130, typically in series or parallel. The bolted connection method facilitates disassembly, making it easier to inspect internal problems of the battery pack and replace components. Especially when individual damaged cells are peeled off, the bolted structure makes it easier to peel off damaged cells compared to a welded connection.

[0045] According to the cell connection assembly of this utility model, since the first bracket, the tab connector, the connecting plate, and the second bracket are detachably connected, and the tab connector is suitable for detachable connection with the cell tab, this cell connection assembly can be used to assemble battery modules where the cells can be quickly disassembled and replaced. Furthermore, due to the structure where the tab pressure plate is rotatably connected to the first bracket, compared to a fixed tab pressure plate that cannot be adjusted, it is more conducive to the rapid disassembly and replacement of the cells. In addition, since the tab connector and the cell tab are detachably connected, compared to traditional welding methods, it is easier to peel off and replace individual damaged cells, improving the efficiency of cell maintenance. The above structure also avoids the resource waste caused by replacing the entire battery pack due to the damage of individual cells, improving the utilization rate of cell resources.

[0046] like Figure 8 As shown, according to another aspect of the present invention, a battery module 200 is provided, including battery cells 210 and a battery cell connection assembly 100 as described above. The battery cells 210 are arranged in parallel. The battery module according to the present invention has the same beneficial effects as the aforementioned battery cell connection assembly. Further, the battery module also includes a module end plate 220 and an isolation pad 230, wherein the module end plate 220 is arranged parallel to the battery cells 210 and located outside the battery cells 210, and an isolation pad 230 is provided between any two adjacent battery cells. The isolation pad 230 can be made of foam or other suitable materials to provide cushioning protection for the battery cells 210. In this embodiment, the module end plate protects the battery cells and maintains their neat arrangement. The isolation pad provides additional cushioning and protection for the battery cells, preventing damage caused by mutual friction during battery module transportation or use.

[0047] According to another aspect of the present invention, a battery pack is provided, comprising the battery module and housing as described above, having the same beneficial effects as the aforementioned cell connection assembly.

[0048] According to another aspect of this utility model, an electrical device is provided, including the aforementioned battery pack. Therefore, this electrical device possesses all the features and advantages of the aforementioned battery pack, which will not be repeated here.

[0049] The aforementioned battery pack can be used as a power source for the electrical device, or as an energy storage unit for the electrical device. The electrical device may include, but is not limited to, mobile devices (such as mobile phones, tablets, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric trucks, electric forklifts, etc.), ships, energy storage systems, etc.

[0050] In the description of the embodiments of this utility model, it should be understood that the terms "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] It should be understood that expressions such as "comprising" and "may include" used in this invention indicate the presence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this invention, terms such as "comprising" and / or "having" are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0052] In this embodiment of the invention, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements.

[0053] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0054] In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of the embodiments of this utility model, when a component is referred to as "connected" or "accessed" to other components, it should be understood that the component is not only directly connected to or accessed to other components, but also that another component may exist between the component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that there is no component between them. When a component is referred to as "actively connected" to other components, it means that the positional relationship between the component and other components is variable, such as the relationship between a slide rail and a slider, where the slider can slide on the slide rail, and the slide rail and the track are actively connected. When a component is referred to as "fixedly connected" to other components, it means that the positional relationship between the component and other components after assembly is relatively fixed.

[0056] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this invention and form different embodiments.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Although this utility model has been described with reference to a limited number of embodiments, those skilled in the art will understand from the above description that other embodiments can be conceived within the scope of this utility model described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for interpreting or limiting the subject matter of this utility model. Therefore, many modifications and alterations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of this utility model, the disclosure made herein is illustrative and not restrictive, and the protection scope of this patent application shall be determined by the scope of the claims.

Claims

1. A cell connection assembly, characterized in that, include: A first bracket, wherein a first connection hole is provided on the first bracket; A tab connector is disposed in the first connection hole, wherein when the cell connection assembly is used for cell connection, the tab connector is detachably connected to the cell tab; A connecting plate is provided on the side of the electrode connector away from the battery cell electrode and is electrically connected to the electrode connector; The second bracket is detachably connected to the first bracket via a bracket fixing mechanism and exposes at least a portion of the connecting plate.

2. The cell connection assembly as described in claim 1, characterized in that, The electrode connector includes a body and a first connecting portion disposed on the upper part of the body. The body is installed in the first connecting hole, the first connecting portion is located on one side of the first mounting surface of the first bracket, and the structure of the body located on the second mounting surface of the first bracket is adapted to be detachably connected to the battery cell electrode; and / or, the second bracket is provided with a clearance hole corresponding to the connecting tab for exposing at least a portion of the connecting tab.

3. The cell connection assembly as described in claim 2, characterized in that, The first bracket further includes a mounting base disposed on the inner wall of the first connecting hole, and the electrode connector further includes a rotating shaft disposed on both sides of the body, the rotating shaft being adapted to the mounting base and rotatable within the mounting base.

4. The cell connection assembly as described in claim 2, characterized in that, The first connecting part includes a bolt post, and the connecting plate is provided with corresponding bolt mounting holes. The connecting plate is sleeved on the bolt post and fixed by a connecting nut.

5. The cell connection assembly as described in claim 2, characterized in that, The detachable connection between the structure of the body located on one side of the second mounting surface and the battery cell tab includes crimping.

6. The cell connection assembly as described in claim 2, characterized in that, The shape of the relief hole is consistent with the shape of the corresponding connecting plate, and the area of ​​the relief hole is smaller than the area of ​​the connecting plate.

7. A battery module, characterized in that, include: At least two battery cells and a battery cell connection assembly for realizing the electrical connection of the battery cells, wherein the battery cell connection assembly is the battery cell connection assembly as described in any one of claims 1-6.

8. The battery module as described in claim 7, characterized in that, It also includes module end plates and isolation gaskets. The module end plates are arranged perpendicularly to the cell connection assembly, the cells are arranged in parallel between the module end plates, and an isolation gasket is provided between any two adjacent cells.

9. A battery pack, characterized in that, include: A housing and a battery module disposed within the housing, wherein the battery module is the battery module as described in claim 7 or 8.

10. An electrical device, characterized in that, Includes the battery pack as described in claim 9.

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