WO2021258782A1

WO2021258782A1 - Connecting assembly for connecting two single batteries, battery module and battery pack

Info

Publication number: WO2021258782A1
Application number: PCT/CN2021/080276
Authority: WO
Inventors: 张芹
Original assignee: 深圳市海瀚新能源技术有限公司
Priority date: 2020-06-23
Filing date: 2021-03-11
Publication date: 2021-12-30

Abstract

A connecting assembly (200) for connecting two single batteries (110), a battery module (100) and a battery pack (300). The battery module (100) comprises at least two single batteries (110) and the connecting assembly (200) for connecting poles of the two single batteries (110), the connecting assembly (200) comprises a first connecting piece (210), a second connecting piece (220) and a fixing plate (230), and the first connecting piece (210) and the second connecting piece (220) are detachably connected to the fixing plate (230) by means of threaded pieces (201). A first extension part (213) and a second extension part (223) are detachably connected to the fixing plate (230) by means of the threaded pieces (201), which facilitates the disassembly of the two connected single batteries (110), and reduces the damage to the poles in the disassembly process; and a first bent part (212) and a second bent part (222) directly or indirectly abut against the fixing plate (230), and in the disassembly process, relative rotation between the fixing plate (230) and the first bent part (212) and the second bent part (222) can be avoided, so that loosening of the poles and the first connecting piece (210) or the second connecting piece (220) and damage of the poles are avoided. And in the re-installation process, the poles can be directly connected to the first connecting piece (210), thereby achieving connection with the poles.

Description

Connecting assembly, battery module and battery pack for connecting two single batteries

Cross-references to related applications

This application requires a Chinese patent application with application number 2020105938451, titled "Connecting components, battery modules and battery packs for connecting two single cells" to be submitted to the Chinese Patent Office on June 23, 2020, and June 2020 The priority of the Chinese patent application with the application number 2020211918910 and the name "Connecting assembly, battery module and battery pack for connecting two single cells" submitted to the Chinese Patent Office on 23rd, the entire contents of which are incorporated by reference In this application.

Technical field

This application relates to the field of batteries, and in particular, to a connecting assembly, a battery module and a battery pack for connecting two single batteries.

Background technique

The battery module refers to a structure in which multiple single cells are connected in series or in parallel through aluminum sheets. Usually, the poles connecting the positive and negative poles of two adjacent batteries are respectively welded or threaded. If the battery needs to be reassembled, the single battery needs to be disassembled and reassembled. It is easy to cause damage or even damage to the pole during the disassembly process, which will affect the use of the secondary connection.

Summary of the invention

The embodiments of the present application provide a connecting assembly, a battery module and a battery pack for connecting two single battery poles, which improves the fact that the existing battery modules are easily damaged or even damaged to the poles during the disassembling process. The problem.

The embodiment of the present application provides a battery module. The battery module may include at least two single cells and a connecting assembly for connecting the two single battery poles; the connecting assembly may include a first connecting piece and a second connecting piece. Sheet and fixing plate; the first connecting sheet may include a first fixing portion, a first bending portion, and a first extension portion that are connected in sequence; the second connecting sheet may include a second fixing portion, a second bending portion, and that are connected in sequence The second extension part; the first fixing part and the second fixing part can be respectively connected to the poles of the two single cells.

The fixing plate can abut against at least one single battery, the first bending part can abut against the side wall of the fixing plate; the second bending part can abut against the side wall of the fixing plate or the side wall of the first extension part. The first extension part and the second extension part can be detachably connected to the fixing plate through a screw member.

The first extension part and the second extension part can be detachably connected to the fixing plate through a screw member, which facilitates the disassembly of the connected two batteries and reduces the damage to the pole during the disassembly process. The first bending part and the second bending part The part directly or indirectly abuts against the fixing plate. During the disassembly process, the relative rotation of the fixing plate and the first bending part and the second bending part can be avoided to avoid the loosening of the pole and the first connecting piece or the second connecting piece. The breakage of the pole. During the reinstallation process, it can be directly connected with the first connecting piece to realize the connection with the pole.

In some embodiments of the present application, the first bending part and the second bending part may both abut against the side wall of the fixing plate; the first extension part and the second extension part may be detachable from the fixing plate through a screw member, respectively connect.

In some embodiments of the present application, the extension directions of the first extension portion and the second extension portion may both be the connection direction of the two single battery poles.

The first extension part and the second extension part are arranged opposite to each other, which can reduce the volume of the connection assembly, reduce the length of the first connection piece and the second connection piece, and reduce the length of the current path between the poles.

In some embodiments of the present application, the first extension stack can be provided on the side of the fixing plate away from the single battery; the second extension stack can be provided on the side of the first extension away from the fixing plate; the screw member can pass through the first extension The second extension part and the first extension part are connected with the fixing plate.

In some embodiments of the present application, the fixing plate may only abut one of the single cells.

In some embodiments of the present application, the first extension portion and the second extension portion may both be provided with a through hole and an opening through which the screw member passes; the opening communicates with the through hole, and the opening penetrates the first extension portion and the second extension portion. The edge of the department.

The screw member can be removed from the position of the opening to separate the screw member from the first extension part and the second extension part to achieve the purpose of disassembly.

In some embodiments of the present application, the surface layer of the position where the first bending portion and the second bending portion are connected to the screw member may be provided with a nickel layer.

In some embodiments of the present application, the surface of the fixing plate may be provided with a nickel layer.

In some embodiments of the present application, the second extension part, the first extension part and the fixing plate may be attached to each other.

In some embodiments of the present application, the fixing plate may be a special-shaped plate, and the side wall of the fixing plate may abut the first bending part and the second bending part.

The embodiment of the present application provides a battery pack, which includes a circuit board and the battery module of the foregoing embodiment;

The circuit board can be detachably connected with the screw through the voltage nickel sheet.

The circuit board is connected to the threaded part through the voltage nickel plate, and during the disassembly process, the threaded part is detachably connected to the voltage nickel plate, so that the voltage nickel plate and the circuit board can not be damaged, so as to separate the circuit board and the connecting assembly. Correspondingly, the secondary utilization of the voltage nickel sheet and the circuit board can be realized.

The embodiment of the present application provides a connecting assembly for connecting two single cells, the connecting assembly may include a first connecting piece, a second connecting piece, and a fixing plate;

The first connecting piece may include a first fixing part, a first bending part and a first extension part connected in sequence;

The second connecting piece may include a second fixing part, a second bending part, and a second extension part that are connected in sequence;

The first fixing part and the second fixing part may be configured to be connected to the poles of the two single cells;

The fixing plate may be configured to abut against at least one single battery, the first bending part may be configured to abut against the side wall of the fixing plate; the second bending part may be configured to abut against the fixing plate or the first extension part;

The first extension part and the second extension part may be configured to be connected to the fixing plate by a screw member.

In some embodiments of the present application, both the first bending part and the second bending part can abut against the side wall of the fixing plate; the first extension part and the second extension part can be detachable from the fixing plate through a screw member, respectively connect.

In some embodiments of the present application, both the first extension portion and the second extension portion may be provided with a through hole and an opening through which the screw member passes; the opening is communicated with the through hole, and the opening may penetrate the first extension portion and the second extension portion The edge of the extension.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative work.

FIG. 1 shows a schematic structural diagram of an implementation manner of a battery module provided by an embodiment of the present application.

Fig. 2 shows a schematic structural diagram of an embodiment of the connecting assembly in the embodiment shown in Fig. 1.

Fig. 3 shows a schematic structural diagram of another embodiment of the connecting assembly in the embodiment shown in Fig. 1.

Fig. 4 shows a schematic structural diagram of another embodiment of the connecting assembly in the embodiment shown in Fig. 1.

FIG. 5 shows a schematic structural diagram of an implementation manner of a battery module provided by an embodiment of the present application.

FIG. 6 shows a schematic structural diagram of an embodiment of the connecting assembly in the embodiment shown in FIG. 5.

FIG. 7 shows a schematic structural diagram of another embodiment of the connecting assembly in the embodiment shown in FIG. 5.

FIG. 8 shows a schematic structural diagram of an embodiment of the battery pack provided by the present application.

FIG. 9 shows a schematic structural diagram of another embodiment of the battery pack provided by the present application.

Icon: 100-battery module; 110-single cell; 200-connection assembly; 201-screw member; 202-opening; 210-first connecting piece; 211-first fixing part; 212-first bending part; 213-first extension part; 220-second connecting piece; 221-second fixing part; 222-second bending part; 223-second extension part; 230-fixing plate; 300-battery pack; 301-circuit board ; 302-Voltage nickel sheet.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments These are a part of the embodiments of this application, but not all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

In the description of the embodiments of this application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by "" is based on the orientation or positional relationship shown in the drawings, or is the orientation or positional relationship that is customarily placed when the application product is used, or is the orientation or positional relationship commonly understood by those skilled in the art, It is only for the convenience of describing the application 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, and therefore cannot be understood as a limitation of the application.

In addition, the terms "first", "second", "third", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly defined and defined, the terms “setup”, “installation”, “connected”, and “connected” should be understood in a broad sense, for example, they may be fixed The connection may also be a detachable connection or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

Example

FIG. 1 shows a schematic structural diagram of an implementation manner of a battery module 100 provided by an embodiment of the present application. Please refer to FIG. 1, this embodiment provides a battery module 100. The battery module 100 may include at least two single cells 110 and a connecting assembly 200. The connecting assembly 200 may be used to connect the poles of the two single cells 110. It should be understood that the embodiment of the present application does not correspond to one battery module. The number of single cells 110 in 100 is limited.

In the embodiment of the present application, the connecting assembly 200 may include a first connecting piece 210, a second connecting piece 220 and a fixing plate 230. The first connecting piece 210 and the second connecting piece 220 may be respectively connected to the poles of two adjacent single cells 110, and the fixing plate 230 may be detachably connected to the first connecting piece 210 and the second connecting piece 220.

In detail, the first connecting piece 210 may include a first fixing part 211 (see FIG. 2 ), a first bending part 212 and a first extension part 213 that are connected in sequence.

The second connecting piece 220 may include a second fixing part 221 (see FIG. 2 ), a second bending part 222 and a second extension part 223 which are connected in sequence.

The first fixing portion 211 and the second fixing portion 221 may be connected to the poles of the two single cells 110 respectively.

The fixing plate 230 may abut the at least one single battery 110, the first bending portion 212 may abut the side wall of the fixing plate 230; the second bending portion 222 may be abutting the side wall of the fixing plate 230 or the first extension portion The side wall of 213 abuts; the first extension 213 and the second extension 223 can be detachably connected to the fixing plate 230 through the screw 201.

In the embodiment of the present application, the threaded member 201 refers to a component that is detachably connected to the first extension portion 213 in a rotating manner, and is not limited to bolts, screws, etc., and may be rivets or the like.

In the embodiment of the present application, the first extension 213 and the second extension 223 are detachably connected to the fixing plate 230. In the process of detaching the two unit batteries 110 connected, the first extension 213 and the second extension The second extension part 223 can be separated from the fixing plate 230 and can be disassembled to avoid damage to the pole; the first bending part 212 abuts against the side wall of the fixing plate 230; the second bending part 222 is against the side wall of the fixing plate 230 Or the side wall of the first extension 213 is against; during the disassembly process, the fixing plate 230 can be prevented from rotating relative to the first connecting piece 210 and the second connecting piece 220, thereby avoiding torque transmission to the pole pole; it can be ensured as much as possible The pole is intact. In addition, after disassembly, the connection between the pole and the first connecting piece 210 can be maintained, which facilitates installation and use again, avoiding the need to use a new first connecting piece 210 when reusing, and reducing the use cost.

FIG. 2 shows a schematic structural diagram of an embodiment of the connection assembly 200 in the embodiment shown in FIG. 1.

1 and 2, the first bending portion 212 can abut the side wall of the fixing plate 230; the second bending portion 222 can abut the side wall of the fixing plate 230; the first extension 213 and the second The extension part 223 can be detachably connected to the fixing plate 230 through the screw 201 respectively.

In one embodiment, the first extension 213 may be in surface contact with the fixing plate 230, and the second extension 223 may be in surface contact with the fixing plate 230; the first extension 213 and the second extension 223 are spaced apart, and the first extension Both the folding portion 212 and the second bending portion 222 abut against the side wall of the fixing plate 230.

Optionally, in an embodiment, the first extension 213 and the second extension 223 may be parallel to each other. The extension direction of the first extension 213 is the direction from the pole to the explosion-proof valve, and correspondingly, the extension direction of the second extension 223 is the direction from the pole to the explosion-proof valve.

In an embodiment, the threaded member 201 may be a screw or a rivet, for example.

The materials of the first connecting piece 210, the second connecting piece 220, and the fixing plate 230 may all be aluminum. Optionally, in order to increase the hardness of the first extension 213 and the fixing plate 230, the connection between the first extension 213, the fixing plate 230 and the screw 201 is more stable and reliable. The positions where the first extension 213 and the second extension 223 contact the screw 201 are plated with a nickel layer. Optionally, the surface of the fixing plate 230 is also plated with a nickel layer. It should be noted that in other embodiments of the present application, the fixing plate 230 may be a nickel plate, or the first extension portion 213 and the second extension portion 223 may be plated with nickel entirely.

In the embodiment shown in FIG. 2, based on the positional relationship of the first extension portion 213, the second extension portion 223, and the fixing plate 230, in the process of detaching the two connected single cells 110, the fixing plate 230 can be prevented from facing each other. The rotation of the first connecting piece 210 and the second connecting piece 220 avoids damage to the pole due to torque transmission; the pole is as intact as possible.

FIG. 3 shows a schematic structural diagram of another embodiment of the connecting assembly 200 in the embodiment shown in FIG. 1.

Please refer to FIGS. 1 and 3. The difference between the embodiment shown in FIG. 3 and FIG. 2 is that in the embodiment shown in FIG. 3, both the first extension portion 213 and the second extension portion 223 are provided with an opening 202; It penetrates the edge of the first extension 213 or the opening 202 penetrates the edge of the second extension 223.

In detail, both the first extension portion 213 and the second extension portion 223 may be provided with a through hole for the threaded member 201 to pass through, the opening 202 is in communication with the opening, and the opening 202 may be for the threaded member 201 to pass through. In the process of disassembling the two connected single cells 110, the screw 201 can be moved out of the position of the opening 202 to separate the screw 201 from the first extension 213 and the second extension 223 to achieve the purpose of disassembly.

In the embodiment shown in FIG. 3, the threaded member 201 may be, for example, a screw, a rivet, a bolt, or the like.

By setting the opening 202, the first extension 213 and the second extension 223 can be separated quickly. In addition, the pole can be prevented from loosening with the first connecting piece 210 and the second connecting piece 220 due to torque during the disassembling process.

FIG. 4 shows a schematic structural diagram of an embodiment of the connection assembly 200 in the embodiment shown in FIG. 1.

Please refer to FIGS. 1 and 4. The difference between the embodiment shown in FIG. 4 and FIG. 2 is that in the embodiment shown in FIG. 4, the extending directions of the first extension portion 213 and the second extension portion 223 are not parallel, in other words The first connecting piece 210 and the second connecting piece 220 are not arranged in parallel to each other, and the first connecting piece 210 and the second connecting piece 220 have a certain angle.

Correspondingly, in the embodiment shown in FIG. 2, the fixing plate 230 is a rectangular thin plate. In another embodiment, the fixing plate 230 is a special-shaped plate. The two bending parts 222 abut against each other.

Alternatively, in other embodiments, the first extension portion 213 and the second extension portion 223 are arranged opposite to each other. The extension directions of the first extension 213 and the second extension 223 are both the connection direction of the poles of the two single cells 110. In other words, the free end of the first extension part 213 faces the second extension part 223, and the free end of the second extension part 223 faces the first extension part 213. The first extension portion 213 and the second extension portion 223 are arranged opposite to each other, which can reduce the volume of the connection assembly 200. Correspondingly, the length of the first connection piece 210 and the second connection piece 220 can be reduced, and the current between the poles can be reduced. The length of the path.

It should be noted that in other embodiments of the present application, the first extension portion 213, the second extension portion 223, and the fixing plate 230 may also have other connection methods and positional relationships.

For example, in the embodiment shown in FIGS. 2 to 4, the first extension 213 and the fixing plate 230 may abut against each other in a face-to-face contact, and the second extension 223 and the fixing plate 230 may be face-to-face. Lean against each other in contact with each other. It can increase the effect of current transfer and also reduce the volume.

It can be understood that, in other embodiments of the present application, the first extension 213 and the fixing plate 230 may not abut, and there is a certain gap between the first extension 213 and the fixing plate 230, and the two pass through the screw 201. Make a connection.

FIG. 5 shows a schematic structural diagram of an embodiment of the battery module 100 provided by an embodiment of the present application. Please refer to FIG. 5. In the embodiment shown in FIG. 5, the first bending portion 212 and the fixing plate 230 are The side wall abuts; the second bent portion 222 abuts the side wall of the first extension 213; the first extension 213, the second extension 223 and the fixing plate 230 are connected by a screw 201.

In FIG. 5, one side of the fixing plate 230 can resist the single battery 110, the first extension 213 can be stacked on the side of the fixing plate 230 away from the single battery 110; the second extension 223 can be stacked on the first The extension part 213 is away from the side of the fixing plate 230; the first extension part 213, the second extension part 223 and the fixing plate 230 may be connected by a screw 201. In the embodiment shown in FIG. 5, the lengths of the first connecting piece 210 and the second connecting piece 220 are small, which can reduce the length of the current path between the poles.

FIG. 6 shows a schematic structural diagram of an embodiment of the connecting assembly 200 in the embodiment shown in FIG. 5. Please refer to FIG. 6. In the embodiment shown in FIG. The shape and size of the extension part 213 are almost the same. The fixing plate 230 is a square thin plate, and the second extension part 223 can completely overlap the side of the first extension part 213 away from the fixing plate 230. The fixing plate 230 is attached to the wall of the single battery 110.

In the embodiment shown in FIG. 6, the second extension portion 223, the first extension portion 213 and the fixing plate 230 are attached to each other to reduce the height of the connection assembly 200. In the embodiment shown in FIG. 7, the threaded member 201 may be, for example, a rivet, a screw, or a bolt.

FIG. 7 shows a schematic structural diagram of an embodiment of the connecting assembly 200 in the embodiment shown in FIG. 5. Please refer to FIG. 7. In the embodiment shown in FIG. The shape of the extension 213 is different.

It is understandable that in the embodiments of FIGS. 6 and 7, in the process of disassembling the two connected single cells 110, the fixing plate 230 can be prevented from rotating relative to the first connecting piece 210 and the second connecting piece 220, thereby preventing Torque transmission damages the pole; it can ensure the integrity of the pole as much as possible. It should be noted that, in other embodiments of the present application, the connecting assembly 200 is not limited to the embodiments shown in FIGS. 7 and 6.

In the embodiment of FIGS. 7 and 6, in order to improve the hardness of the first extension 213 and the fixing plate 230, the connection between the first extension 213, the fixing plate 230 and the screw 201 is more stable and reliable. The positions where the first extension 213 and the second extension 223 contact the screw 201 are plated with a nickel layer. Optionally, the surface of the fixing plate 230 is also plated with a nickel layer. It should be noted that in other embodiments of the present application, the fixing plate 230 may be a nickel plate, or the first extension portion 213 and the second extension portion 223 may be plated with nickel entirely.

Optionally, in some embodiments of the present application, the fixing plate 230 may only abut one of the single cells 110. In other words, the side of the fixing plate 230 away from the first connecting piece 210 only abuts against one single battery 110. After the single battery 110 is disassembled, the fixing plate 230 can still resist one of the single batteries 110, and the process of connecting the fixing plate 230 can be omitted in the process of reusing and reconnecting.

The connection assembly 200 provided by the embodiment of the present application, for example, has at least the following advantages:

The first extension part 213 and the second extension part 223 are detachably connected to the fixing plate 230 through the screw 201, which facilitates the disassembly of the two connected batteries and reduces the damage to the pole during the disassembly process. The first bending part 212, The second bending portion 222 directly or indirectly abuts against the fixing plate 230. During the disassembly process, the fixing plate 230 and the first bending portion 212 and the second bending portion 222 can be prevented from rotating relative to each other so as to prevent the pole from being connected to the first The looseness of the sheet 210 or the second connecting sheet 220 and the damage of the pole. During the reinstallation process, it can be directly connected with the first connecting piece 210 to realize the connection with the pole.

Correspondingly, the battery module 100 provided by the embodiment of the present application has all the advantages of the connection assembly 200 described above.

FIG. 8 shows a schematic structural diagram of an embodiment of the battery pack 300 provided by the present application. FIG. 9 shows a schematic structural diagram of another embodiment of a battery pack 300 provided by the present application. Please refer to FIG. 9 and FIG. 8. This application provides a battery pack 300. The battery pack 300 may include a circuit board 301 and the foregoing Battery module 100. The circuit board 301 can be detachably connected to the screw 201 through the voltage nickel sheet 302.

In the embodiment shown in FIG. 8, the battery module 100 is provided by the embodiment shown in FIG. 1. In the embodiment shown in FIG. 9, the battery module 100 is provided by the embodiment shown in FIG. 2.

The circuit board 301 can be connected to the screw member 201 through the voltage nickel sheet 302. During the disassembly process, the screw member 201 is detachably connected to the voltage nickel sheet 302, so that the voltage nickel sheet 302 and the circuit board 301 are not damaged to connect the circuit board 301 is separated from the connection assembly 200. Correspondingly, the secondary utilization of the voltage nickel sheet 302 and the circuit board 301 can be realized.

The foregoing descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Industrial applicability

The present application provides a connecting assembly, a battery module and a battery pack for connecting two single cells, which improves the problem that the existing battery module is likely to cause damage or even damage to the pole during the disassembling process. The connecting assembly includes a first connecting piece, a second connecting piece and a fixing plate; the first connecting piece and the second connecting piece are detachably connected with the fixing plate through a screw member. The first extension part and the second extension part are detachably connected to the fixing plate through the screw member, which facilitates the disassembly of the connected two batteries and reduces the damage to the pole during the disassembly process. The first bending part and the second bending part Abut against the fixing plate directly or indirectly, during the disassembly process, the relative rotation of the fixing plate and the first bending part and the second bending part can be avoided, so as to avoid the loosening of the pole and the first connecting piece or the second connecting piece. Breakage of the column.

In addition, it can be understood that the application is reproducible and can be used in a variety of industrial applications. For example, the present application can be used for any parts that need to assemble and disassemble battery modules.

Claims

A battery module, characterized in that, the battery module includes at least two single cells and a connecting assembly for connecting the two single battery poles;

The connecting assembly includes a first connecting piece, a second connecting piece and a fixing plate;

The first connecting piece includes a first fixing part, a first bending part, and a first extension part that are connected in sequence;

The second connecting piece includes a second fixing part, a second bending part and a second extension part connected in sequence;

The first fixing portion and the second fixing portion are respectively connected to the poles of the two single cells;

The fixing plate abuts against at least one of the single cells, the first bending part abuts against the side wall of the fixing plate; the second bending part is against the side wall or the fixing plate The side wall of the first extension part abuts;

The first extension portion and the second extension portion are detachably connected to the fixing plate through a screw member.
The battery module of claim 1, wherein:

The first bending portion and the second bending portion abut against the side wall of the fixing plate; the first extension portion and the second extension portion are respectively connected to the fixing plate through the screw member The board can be detachably connected.
The battery module of claim 1, wherein:

The extension directions of the first extension portion and the second extension portion are both the connection direction of the two single battery poles.
The battery module according to claim 3, wherein the first extension is stacked on a side of the fixing plate away from the single battery; the second extension is stacked on the first The side of the extension part away from the fixing plate;

The threaded member passes through the second extension portion, and the first extension portion is connected to the fixing plate.
The battery module according to claim 3, wherein the fixing plate only abuts on one of the single cells.
The battery module according to any one of claims 1 to 5, wherein the first extension portion and the second extension portion are both provided with a through hole and an opening for the screw to pass through The opening is in communication with the through hole, and the opening penetrates the edges of the first extension and the second extension.
The battery module according to any one of claims 1 to 6, wherein the surface of the position where the first bending portion and the second bending portion are connected to the screw member is provided with nickel Floor.
The battery module according to any one of claims 1 to 7, wherein the surface of the fixing plate is provided with a nickel layer.
The battery module according to any one of claims 3 to 5, wherein the second extension portion, the first extension portion, and the fixing plate are attached to each other.
The battery module according to any one of claims 1 to 9, wherein the fixing plate is a special-shaped plate, and the side walls of the fixing plate are connected to the first bending portion and the second The bending part abuts.
A battery pack, characterized in that it comprises a circuit board and the battery module according to any one of claims 1 to 10;

The circuit board is detachably connected with the screw member through a voltage nickel sheet.
A connecting assembly for connecting two single batteries, characterized in that the connecting assembly includes a first connecting piece, a second connecting piece and a fixing plate;

The first connecting piece includes a first fixing part, a first bending part, and a first extension part that are connected in sequence;

The second connecting piece includes a second fixing part, a second bending part and a second extension part connected in sequence;

The first fixing part and the second fixing part are configured to be connected to the poles of the two single cells;

The fixing plate is configured to abut against at least one of the single cells, the first bending portion is configured to abut against the side wall of the fixing plate; the second bending portion is configured to abut against the fixing plate The board or the first extension part abuts;

The first extension portion and the second extension portion are configured to be connected to the fixing plate through a screw member.
The connection assembly according to claim 12, wherein the first bending portion and the second bending portion abut against the side wall of the fixing plate; the first extension portion, the The second extension part is detachably connected to the fixing plate through the screw member.
The connection assembly according to claim 12 or 13, wherein the extension directions of the first extension portion and the second extension portion are both the connection direction of the two single battery poles.
The connection assembly according to any one of claims 12 to 14, wherein the first extension portion and the second extension portion are both provided with a through hole and an opening for the threaded member to pass through; The opening communicates with the through hole, and the opening penetrates the edges of the first extension portion and the second extension portion.
The connection assembly according to any one of claims 12 to 15, wherein the surface layer of the position where the first bending portion and the second bending portion are connected to the screw member is provided with a nickel layer .