CN217768678U - Battery module and electronic device - Google Patents

Abstract

The utility model discloses a battery module and electron device. The battery module comprises a shell, a plurality of battery cores, a first electrode output piece, a bus bar and a flexible circuit board. Each battery cell is provided with a tab and a battery cell body connected with the tab. The first electrode output piece is electrically connected with a tab of one of the battery cells arranged on the outermost side. The bus bar supports and positions the tabs, and the flexible circuit board is electrically connected with the tabs and partially attached to the bus bar. The flexible circuit board is provided with a main body part and a first extension part connected with the main body part, the main body part is attached to a first mounting surface departing from the battery cell body on the bus bar, and the first extension part is connected with the first electrode output part. The first recess that the direction is sunken towards electric core body is seted up for first installation face for one side that the busbar deviates from electric core body, and first extension part extends and gets into in the first recess and attached in. This battery module can be easy to assemble flexible circuit board, improves work efficiency, and each part carries out reasonable layout in the battery module.

Description

Battery module and electronic device

Technical Field

The utility model relates to a battery technology field, in particular to battery module and electron device.

Background

In the prior art, the structure of the battery module is complex, and many matching relations exist among all parts. In the battery module, the bus bar support is an important part, and can play a role in fixing and supporting and positioning the tabs, guiding the battery cell tabs, and the like, and the flexible circuit board also needs to be connected and fixed to the bus bar and the bus bar support. In a conventional battery module, a plurality of battery cells are generally stacked in a battery case, and a plurality of parts such as a bus bar and a flexible circuit board are sequentially mounted on the battery cells. In the installation process, the flexible circuit board is welded on the electrode output piece through the nickel sheet, the electrode output piece protrudes out of the bus bar, the bus bar can interfere with the flexible circuit board, the attaching degree between the flexible circuit board and the bus bar is poor, and the flexible circuit board is inconvenient to connect with the electrode output piece.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module and electron device can the easy to assemble flexible circuit board, improves work efficiency, and each part carries out rational arrangement in the battery module.

In order to solve the technical problem, the utility model provides a battery module, include:

a housing comprising an end plate;

the battery cell comprises a plurality of battery cells, a plurality of terminal plates and a plurality of battery cells, wherein the battery cells are sequentially arranged in the shell along a first direction, each battery cell is provided with a lug and a battery cell body connected with the lug, and the lug extends from one side of the battery cell body to the terminal plate;

a first electrode output member electrically connected to the tab of one of the cells arranged on the outermost side in the first direction;

the busbar is arranged between the end plate and the cell body, and is used for supporting and positioning the lug, and the busbar is provided with a first mounting surface deviating from the cell body;

the flexible circuit board is electrically connected with the lug, at least part of the flexible circuit board extends to the bus bar and is attached to the bus bar; the flexible circuit board is provided with a main body part and a first extension part connected with the main body part, at least part of the main body part is attached to the first mounting surface, and the first extension part is used for being connected with the first electrode output part; wherein, the first and the second end of the pipe are connected with each other,

the busbar is provided with a first groove on one side departing from the battery cell body, the first groove is sunken relative to the direction of the first mounting surface towards the battery cell body, and at least part of the first extending portion extends into the first groove and is attached to the first groove.

The embodiment of the utility model provides a for prior art, when installing the flexible circuit board, the main part of flexible circuit board is attached to first installation face on, and seted up first recess on one side that the busbar deviates from electric core body, the flexible circuit board need be connected with first electrode output piece electricity, extend into first recess and attached in first recess through the at least part of first extension that the flexible circuit board formed, let first recess form and dodge the space, the busbar can not lead to the fact when being connected first extension and first electrode output piece and interfere. Thereby make the simple to operate of flexible circuit board, improved work efficiency, and flexible circuit board and busbar are more laminated, and each part carries out reasonable layout in the battery module.

In one embodiment, the first electrode output is disposed on a side of the busbar facing away from the cell body;

the first groove is opened towards the side where the first electrode output piece is positioned; the first groove is provided with a first groove side wall and a second groove side wall, the first groove side wall is positioned on one side, away from the battery cell body, of the busbar, and the second groove side wall is connected with the first installation surface and the first groove side wall; the first extending part is at least partially attached to the first groove side wall and the second groove side wall.

In one embodiment, the second trough side wall is in circular arc transition connection with the first trough side wall;

and/or the side wall of the second groove is in arc transition connection with the first mounting surface. The design of this kind of circular arc transition can make first extension attached in first recess better for even if first extension does not carry out the technology of gum, also can laminate on the busbar, specifically, laminate with first groove lateral wall and the second groove lateral wall of first recess. Not only can save the gum cost, but also quicken the production efficiency.

In one embodiment, the first mounting surface is provided with a first positioning column inserted into the main body part;

and/or a second positioning column inserted into the first extension part is arranged on the side wall of the first groove. Through holes are arranged on the main body part and the first extending part of the flexible circuit board, and the first positioning column and the second positioning column can be inserted into the through holes, so that the flexible circuit board can be generally fixed on the bus bar and cannot be inclined.

In one embodiment, the battery module further includes: a second electrode output member electrically connected to the tab of one of the outermost ones of the plurality of cells arranged on the other side in the first direction;

the flexible circuit board is also provided with a second extension part connected with the main body part, and the second extension part is used for being connected with the second electrode output part;

a second groove is formed in one side, away from the battery cell body, of the busbar, the second groove is sunken relative to the first mounting surface towards the direction of the battery cell body, and at least part of the second extending portion extends into the second groove and is attached to the second groove. The second groove is formed in one side, away from the battery cell body, of the busbar, the second extending end of the flexible circuit board is attached to the second groove, the second groove can provide an avoiding space for a welding position where the second extending portion is electrically connected, interference on a tool can not be generated when the second electrode output piece is connected with the second extending portion in a welding mode, and working efficiency is improved.

In one embodiment, the bus bar is provided with a second mounting surface positioned at the top end of the bus bar, and the main body part is at least partially attached to the first mounting surface and the second mounting surface;

the second groove is formed in one side, away from the battery cell body, of the busbar, and is further opened towards the top end of the busbar; the second groove is provided with a third groove side wall, and the third groove side wall is positioned on one side, away from the battery cell body, of the busbar;

the second extending portion is formed by extending the part, attached to the second mounting surface, of the main body portion towards the bottom end direction of the bus bar, and the second extending portion is attached to the side wall of the third groove.

In one embodiment, a pair of first limit blocks which are relatively isolated along the first direction is arranged on the side wall of the third groove, and the second extending portion is located between the pair of first limit blocks. The pair of first limiting blocks are arranged on two sides of the second extending portion and can limit the second extending portion in the first direction.

In one embodiment, the first mounting surface has a second stopper located at a boundary thereof, the second stopper extending from a top end of the busbar to a bottom end of the busbar; the second limiting block is used for limiting the main body part. The left side and the right side of the main body part in the first direction can be limited by the second limiting blocks.

In one embodiment, a third groove is further formed in one side of the busbar away from the cell body, and the third groove is recessed relative to the first mounting surface in a direction towards the cell body;

the flexible circuit board is also provided with a third extending part which protrudes from the main body part and extends into the third groove, and at least part of the third extending part is attached to the side wall of the third groove;

the battery module further includes: the plug terminal is arranged in the third groove; the plug terminal is electrically connected with the main body part or the third extending part. The third recess has been seted up on the busbar deviates from one side of electric core body, and the third of flexible circuit board extends the end and attaches in the third recess, and the third recess can provide for the third extension carries out the welding position of electricity connection and dodges the space, can not interfere the frock when linking to each other with the welding of third extension to the plug-in terminal, has improved work efficiency.

Another embodiment of the present invention further provides an electronic device, including any one of the above battery modules.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural view illustrating a bus bar and a flexible circuit board disposed in a battery module according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a bus bar according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view of A in FIG. 3;

FIG. 5 is a partial enlarged view of B in FIG. 3;

fig. 6 is a schematic structural diagram of a bus bar and a flexible circuit board according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion C of FIG. 6;

FIG. 8 is an enlarged view of a portion D of FIG. 6;

fig. 9 is a schematic structural view of a bus bar according to another embodiment of the present invention;

FIG. 10 is an enlarged view of E in FIG. 9;

fig. 11 is a partial schematic structural diagram of a bus bar and a flexible circuit board according to another embodiment of the present invention.

Reference numerals are as follows:

100. a battery module; 10. a housing: 11. an end plate; 20. an electric core; 21. a tab; 22. a cell body; 31. a first electrode output; 32. a second electrode output; 33. a plug-in terminal; 40. a bus bar; 41. a first mounting surface; 411. a first positioning post; 412. a second limiting block; 42. a first groove; 421. a first slot sidewall; 4211. a second positioning column; 422. a second trench sidewall; 43. a second groove; 431. a third slot sidewall; 4311. a first stopper; 44. a second mounting surface; 45. a third groove; 50. a flexible circuit board; 51. a main body part; 52. a first extension portion; 53. a second extension portion; 54. a third extension portion; y, first direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following describes each embodiment of the present invention in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity of illustrating the structure and operation of the present invention, directional terms are used, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be interpreted as words of convenience and should not be interpreted as limiting terms.

Embodiments of the present invention are described below with reference to the drawings.

An embodiment of the utility model provides an electronic device, including battery module 100. The electronic device may be an electric vehicle or a battery car, etc. that requires the battery module 100.

An embodiment of the battery module 100 of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic structural diagram of a battery module 100 according to an embodiment of the present invention, and as can be seen from fig. 1, the battery module 100 includes a housing 10, and the housing 10 includes a bottom plate, a cover plate disposed opposite to the bottom plate and spaced apart from the bottom plate, an end plate 11 connected to the bottom plate and the cover plate, and a pair of side plates disposed opposite to each other. The bottom plate, the cover plate and a pair of oppositely disposed side plates are connected to form an opening, and the end plate 11 closes the opening. Fig. 2 is a schematic structural diagram of the bus bar 40 and the flexible circuit board 50 disposed in the battery module 100 according to an embodiment of the present invention, and as can be seen from fig. 2, the battery module 100 further includes a plurality of battery cells 20, a first electrode output member 31, the bus bar 40, and the flexible circuit board 50. The plurality of battery cells 20 are arranged in order between a pair of curb plates that set up relatively, and the direction that a plurality of battery cells 20 were arranged in order is the first direction, and this first direction is the Y direction shown in fig. 2, and each battery cell 20 all has utmost point ear 21 and the cell body 22 that links to each other with utmost point ear 21, and utmost point ear 21 on the battery cell 20 is extended by one side of cell body 22 towards the direction of end plate 11. The bus bar 40 is disposed between the end plate 11 and the cell body 22, and the bus bar 40 supports the positioning tabs 21. The flexible circuit board 50 is electrically connected to the tab 21, and the flexible circuit board 50 partially extends to the busbar 40 and is attached to the busbar 40. The first electrode output member 31 is disposed on a side of the bus bar 40 away from the cell body 22, and is electrically connected to the tab 21 arranged on the outermost one of the battery cells 20, which is the rightmost one of the battery cells 20 in the first direction in fig. 2.

Fig. 3 shows a structural schematic diagram of the bus bar 40, and it can be seen that the bus bar 40 has a first mounting surface 41 facing away from the cell body 22. Fig. 6 shows a schematic structural diagram of the bus bar 40 and the flexible circuit board 50 according to an embodiment of the present invention, as can be seen from fig. 6, the flexible circuit board 50 has a main body portion 51, fig. 7 is a partial enlarged view of C in fig. 6, it can be seen that the flexible circuit board 50 further has a first extending portion 52 connected to the main body portion 51, the main body portion 51 is partially attached to the first mounting surface 41, the first extending portion 52 is connected to the first electrode output member 31, and the first electrode output member 31 serves as a positive output end or a negative output end of the battery module 100.

Because of first electrode output 31 needs to be welded with flexible circuit board 50 and links to each other, and the one side that the busbar 40 deviates from the electricity core body 22 among the prior art is the plane, and first electrode output 31 is protruding to be set up on the one side that busbar 40 deviates from electricity core body 22, and even flexible circuit board 50 also can't laminate mutually with the surface of busbar 40 at the surface gum processing in this kind of setting, and busbar 40 can produce with the frock with the welded in-process of flexible circuit board 50 of first electrode output 31 and interfere, influences work efficiency. Therefore, as shown in fig. 4 which is a partial enlarged view of B in fig. 3, a first groove 42 is formed in a side of the bus bar 40 away from the cell body 22, the first groove 42 is recessed in a direction toward the cell body 22 relative to the first mounting surface 41, and as shown in fig. 7 which is a partial enlarged view of C in fig. 6, a first extending portion 52 is also formed on the flexible circuit board 50 and at least partially extends into the first groove 42 and is attached to the first groove 42.

The embodiment of the utility model discloses an embodiment has seted up first recess 42 on the one side that busbar 40 deviates from electric core body 22 for prior art, and flexible circuit board 50's first extension end is attached in first recess 42, and first recess 42 can provide the space of dodging for flexible circuit board 50 carries out the welding position of electricity connection, can not produce the interference to the frock when connecting flexible circuit board 50 electricity, has improved work efficiency. And main part 51 part is attached on first installation face 41, and first extension 52 at least part extends into first recess 42 and is attached in first recess 42, and flexible circuit board 50 is better with the laminating degree of busbar 40, lets each part carry out reasonable layout in the battery module 100.

It should be understood by those skilled in the art that the housing 10 may be configured without a side plate, a bottom plate or a cover plate, and the first electrode output member 31 may not be disposed on the side of the busbar 40 away from the main body of the electric core 20, without departing from the scope of the present invention.

Further, as shown in fig. 3, the first groove 42 faces the side of the first electrode output member 31 and the top end opening of the bus bar 40, the first groove 42 has a first groove sidewall 421 and a second groove sidewall 422, the first groove sidewall 421 is located on the side of the bus bar 40 departing from the battery cell body 22, the second groove sidewall 422 connects the first mounting surface 41 and the first groove sidewall 421, and the first extending portion 52 is at least partially attached to the first groove sidewall 421 and the second groove sidewall 422. This arrangement facilitates the opening of the first groove 42 in the busbar 40. It should be understood that the first groove 42 of the present invention is not limited to the structure shown in fig. 3, and the first groove 42 does not necessarily need to be open to the top end of the bus bar 40, and those skilled in the art can arrange the groove according to actual needs.

Preferably, as shown in fig. 3, the second slot sidewall 422 is in arc transition connection with the first slot sidewall 421, and the second slot sidewall 422 is in arc transition connection with the first mounting surface 41. Due to the arc transition design, the first extending portion 52 can be better attached to the inside of the first groove 42, so that the first extending portion 52 can be attached to the busbar 40, specifically, the first groove side wall 421 and the second groove side wall 422 of the first groove 42 even if the gluing process is not performed. The arrangement can not only save gum cost, but also accelerate production efficiency. It should be understood that although fig. 3 shows that the second groove sidewall 422 and the first groove sidewall 421 and the second groove sidewall 422 and the first mounting surface 41 are all in circular arc transitional connection, only the second groove sidewall 422 and the first groove sidewall 421 are in circular arc transitional connection, and the second groove sidewall 422 and the first mounting surface 41 are not in circular arc transitional connection; or the second groove side wall 422 and the first mounting surface 41 are in arc transition connection, and the second groove side wall 422 and the first groove side wall 421 are not in arc transition connection, which does not depart from the scope of the present invention.

Fig. 3 shows that the first mounting surface 41 of the busbar 40 is provided with the first positioning column 411 inserted into the main body portion 51, and fig. 4, which is a partially enlarged view of a in fig. 3 a, shows that the first groove side wall 421 is provided with the second positioning column 4211 inserted into the first extending portion 52. Correspondingly, through holes are formed in the main body 51 and the first extending portion 52 of the flexible circuit board 50, and the first positioning column 411 and the second positioning column 4211 can be inserted into the through holes, so that the flexible circuit board 50 can be substantially fixed on the bus bar 40 without being skewed. It should be understood that the first positioning column 411 inserted into the main body portion 51 may be provided only on the first mounting surface 41, and the second positioning column 4211 inserted into the first extending portion 52 may not be provided on the first groove side wall 421; alternatively, it is not departing from the scope of the present invention to provide the second positioning post 4211 inserted into the first extension portion 52 only on the first groove sidewall 421, and not to provide the first positioning post 411 inserted into the main body portion 51 on the first mounting surface 41.

In addition, fig. 2 shows that the battery module 100 is further provided with a second electrode output element 32 electrically connected to the tab 21 of one of the battery cells 20 arranged at the outermost side along the first direction, i.e., the tab 21 of the battery cell 20 located at the leftmost side in fig. 2 is electrically connected to the second electrode output element 32. As can be seen from the enlarged partial view of fig. 5 in fig. 3B, a second groove 43 is formed in a side of the busbar 40 away from the cell body 22, and the second groove 43 is recessed relative to the first mounting surface 41 in a direction toward the cell body 22. Referring to fig. 8, which is a partial enlarged view of D in fig. 6, the flexible circuit board 50 further has a second extending portion 53 connected to the main body portion 51, and the second extending portion 53 is connected to the second electrode output member 32, where the second electrode output member 32 is used for positive and negative electrode output terminals of the battery module 100. The second groove 43 is formed in the side, away from the battery cell body 22, of the bus bar 40, the second extending end of the flexible circuit board 50 is attached to the second groove 43, the second groove 43 can provide an avoiding space for a welding position where the second extending portion 53 is electrically connected, interference on a tool is avoided when the second electrode output part 32 is connected with the second extending portion 53 in a welding mode, and work efficiency is improved.

Further, as shown in fig. 5, the top end of the bus bar 40 has a second mounting surface 44, a second groove 43 is opened on a side of the bus bar 40 away from the cell body 22, and the second groove 43 is also opened toward the top end of the bus bar 40. The second groove 43 has a third groove sidewall 431, and the third groove sidewall 431 is located on a side of the busbar 40 facing away from the cell body 22. Fig. 8 shows that the body portion 51 is partially attached to the first mounting surface 41 and the second mounting surface 44. The second extending portion 53 is formed by extending the portion of the main body 51 attached to the second mounting surface 44 toward the bottom end of the bus bar 40, and the second extending portion 53 is attached to the third groove sidewall 431. The setting can be performed by those skilled in the art according to actual needs.

Preferably, as can be seen in fig. 8, a pair of first stoppers 4311 are provided on the third groove sidewall 431 and spaced apart from each other in the first direction, and the second extending portion 53 is located between the pair of first stoppers 4311. Since the second extending portion 53 is relatively slender, and the second extending portion 53 is disposed on the third groove sidewall 431 and is easily inclined, a pair of first stoppers 4311 disposed on two sides of the second extending portion 53 can limit the second extending portion 53 in the first direction. The setting can be performed by those skilled in the art according to actual needs. In fig. 8, the positioning column is also provided on the third groove side wall 431 to position the second extension portion 53, but in other embodiments, the positioning column may not be provided on the third groove side wall 431, without departing from the scope of the present invention.

Fig. 9 also shows a schematic structural diagram of the bus bar 40 according to another embodiment of the present invention, fig. 10 shows a partially enlarged view of E in fig. 9, in fig. 10, the first mounting surface 41 has a second stopper 412 located at a boundary thereof, the second stopper 412 extends from a top end of the bus bar 40 to a bottom end of the bus bar 40, and the second stopper 412 is used for limiting the main body portion 51. The second stopper 412 is provided to restrict the left and right sides of the main body 51 in the first direction. The setting can be performed by those skilled in the art according to actual needs.

Fig. 11 is a partial structural schematic diagram of the bus bar 40 and the flexible circuit board 50 according to another embodiment of the present invention, and it can be seen from fig. 9 and fig. 11 that a third groove 45 is further formed on one side of the bus bar 40 away from the battery cell body 22, and the third groove 45 is recessed toward the battery cell body 22 relative to the first mounting surface 41. The flexible circuit board 50 has a third extending portion 54 protruding from the main body 51 and extending into the third groove 45, and the third extending portion 54 is partially attached to the side wall of the third groove 45. The battery module 100 further includes a plug terminal 33 disposed in the third groove 45, the plug terminal 33 being electrically connected to the third extension 54. Specifically, the plug terminal 33 may be a low voltage plug of the flexible circuit board 50, and the low voltage plug may collect signals of voltage, electric quantity and temperature in the battery module 100 and transmit the signals to the battery PACK through the low voltage plug. The third groove 45 is formed in the side, away from the battery cell body 22, of the busbar 40, the third extending end of the flexible circuit board 50 is attached to the third groove 45, the third groove 45 can provide an avoiding space for the welding position where the third extending portion 54 is electrically connected, interference to a tool cannot be generated when the plug-in terminal 33 and the third extending portion 54 are welded and connected, and the working efficiency is improved. It is understood that in other embodiments, the plug terminal 33 may be electrically connected to the body portion 51 without departing from the scope of the present invention.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims (10)

1. A battery module, comprising:

a housing comprising an end plate;

the battery cell comprises a plurality of battery cells, a plurality of terminal plates and a plurality of battery cells, wherein the battery cells are sequentially arranged in the shell along a first direction, each battery cell is provided with a lug and a battery cell body connected with the lug, and the lug extends from one side of the battery cell body to the terminal plate;

a first electrode output member electrically connected to the tab of one of the cells arranged outermost in the first direction;

the busbar is arranged between the end plate and the cell body, and is used for supporting and positioning the lug, and the busbar is provided with a first mounting surface deviating from the cell body;

the flexible circuit board is electrically connected with the lug, at least part of the flexible circuit board extends onto the bus bar and is attached to the bus bar; the flexible circuit board is provided with a main body part and a first extension part connected with the main body part, at least part of the main body part is attached to the first mounting surface, and the first extension part is used for being connected with the first electrode output part; wherein, the first and the second end of the pipe are connected with each other,

the busbar is provided with a first groove on one side departing from the battery cell body, the first groove is sunken relative to the direction of the first mounting surface towards the battery cell body, and at least part of the first extending portion extends into the first groove and is attached to the first groove.

2. The battery module according to claim 1, wherein the first electrode output is disposed on a side of the busbar facing away from the cell body;

the first groove is opened towards the side of the first electrode output piece; the first groove is provided with a first groove side wall and a second groove side wall, the first groove side wall is positioned on one side of the busbar, which is far away from the battery cell body, and the second groove side wall is connected with the first mounting surface and the first groove side wall; the first extension part is at least partially attached to the first groove side wall and the second groove side wall.

3. The battery module according to claim 2, wherein the second groove side wall is in arc transition connection with the first groove side wall;

and/or the side wall of the second groove is in arc transition connection with the first mounting surface.

4. The battery module according to claim 2, wherein the first mounting surface is provided with a first positioning post inserted into the main body portion;

and/or a second positioning column inserted into the first extension part is arranged on the side wall of the first groove.

5. The battery module according to claim 1, further comprising: a second electrode output member electrically connected to the tab of one of the outermost ones of the plurality of cells arranged on the other side in the first direction;

the flexible circuit board is also provided with a second extension part connected with the main body part, and the second extension part is used for being connected with the second electrode output part;

a second groove is formed in one side, departing from the battery cell body, of the busbar, the second groove is sunken relative to the direction, facing the battery cell body, of the first mounting surface, and at least part of the second extending portion extends into the second groove and is attached to the inside of the second groove.

6. The battery module according to claim 5, wherein the bus bar has a second mounting surface at a top end of the bus bar, and the body portion is at least partially attached to the first mounting surface and the second mounting surface;

the second groove is formed in one side, away from the battery cell body, of the busbar, and is further opened towards the top end of the busbar; the second groove is provided with a third groove side wall, and the third groove side wall is positioned on one side of the busbar, which is far away from the battery cell body;

the second extending portion is formed by extending the part of the main body portion attached to the second mounting surface towards the bottom end direction of the bus bar, and the second extending portion is attached to the side wall of the third groove.

7. The battery module as recited in claim 6, wherein a pair of first stoppers are disposed on the third groove sidewall and spaced apart from each other along the first direction, and the second extending portion is disposed between the pair of first stoppers.

8. The battery module according to claim 1, wherein the first mounting surface has a second stopper at a boundary thereof, the second stopper extending in a direction from a top end of the bus bar to a bottom end of the bus bar; the second limiting block is used for limiting the main body part.

9. The battery module according to claim 1, wherein a third groove is further formed in a side of the busbar away from the cell body, and the third groove is recessed in a direction toward the cell body relative to the first mounting surface;

the flexible circuit board is also provided with a third extending part which protrudes from the main body part and extends into the third groove, and at least part of the third extending part is attached to the groove side wall of the third groove;

the battery module further includes: the plug terminal is arranged in the third groove; the plug terminal is electrically connected with the main body part or the third extending part.

10. An electronic device, comprising: the battery module according to any one of claims 1 to 9.

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