CN206639834U - A kind of battery modules - Google Patents

Abstract

The utility model discloses a battery module, which comprises end covers located at both ends of the battery module, several battery modules, series components, collection boards and several screw rods; the end cover includes a first end cover and a second end cover; each battery The module includes a number of single cells, a pair of brackets for installing the single cells, side plates connecting the two brackets, and a number of manifolds electrically connected to the electrodes of the single cells; the series assembly includes a number of soft connections and a pair of busbars; The battery modules are stacked between the first end cover and the second end cover, and each soft connection is respectively connected to the busbar in the adjacent battery module to connect the cells on the same side in the adjacent battery modules in series, and the two busbars are connected separately. A manifold is connected and used as the positive and negative poles of the battery module. Compared with the prior art, the utility model has the beneficial effects of: the battery module is compact and simple in structure, easy to be stacked in series or used alone, light in weight and reliable in structure, effectively reducing the cost, thereby improving the performance of the battery module.

Description

A battery module

【Technical field】

The utility model relates to the technical field of new energy power batteries, in particular to a battery module.

【Background technique】

With the continuous consumption of non-renewable resources and the increasingly prominent environmental problems, batteries have developed rapidly in recent years and are widely used in the field of electric vehicles. In order to provide enough power for the electric vehicle, multiple batteries need to be connected in series and parallel to form a battery module to be assembled on the electric vehicle. Usually, the single batteries are connected in series and parallel to form a small battery module, and then multiple battery modules are connected in series or in parallel to form a battery module for use. However, the battery module has not achieved modular production and assembly, and has a large weight and complex structure.

In view of this, it is necessary to provide a battery module to overcome the shortcomings of the prior art.

【Content of utility model】

The purpose of this utility model is to provide a battery module, which can realize modular production and assembly, simplify the installation mechanism of the single battery, effectively reduce the weight of the battery module, effectively improve the reliability of the battery module, and further improve the battery module. Group performance and maintainability.

In order to achieve the above purpose, the utility model provides a battery module, including end caps located at both ends of the battery module, several battery modules, series components, a collection plate fixed on the battery module, and several screws for fixing the battery module; The end cover includes a first end cover and a second end cover; each battery module includes a number of single cells, a pair of brackets for installing the single cells, side plates connecting the two brackets, and a number of cells connected to the single cells. The electrodes of the battery are electrically connected and fixed to the bus plate on the side plate; each support includes a bottom wall and a side wall extending from the edge of the bottom wall; the surface of the bottom wall protrudes on one side of the side wall to form several A storage tube at one end of the fixed battery, a number of hollow fixing posts for fastening two brackets, and a partition in the center of the bottom wall, and the surface of the bottom wall opposite to the storage tube is provided with a number of criss-crossing The receiving groove; the side plates are arranged on the two side walls of the two brackets; The confluence main body of the storage tank and the connection part extending from one side edge of the confluence main body to form a connection with the side plate; the series assembly includes a number of flexible connections electrically connecting two adjacent battery modules and a pair of flexible connections installed at the first end The busbar on the cover, and two flexible connections are provided between two adjacent battery modules; the battery modules are superimposed between the first end cover and the second end cover, and the bus plate is facing the first end cover Or the second end cover, one of the brackets close to the second end cover is provided with a manifold for electrically connecting the single cells on both sides of the partition, and the other brackets are provided with a manifold on both sides of the partition, each Two flexible connections are respectively connected to the busbars in two adjacent battery modules to connect the single cells on the same side of the separator in two adjacent battery modules in series, and the two busbars are respectively electrically connected to a busbar near the first end cover. plate and as the positive and negative poles of the battery module.

As an improvement of the battery module of the utility model, the shape of the fixing column is cylindrical and includes a plurality of first fixing columns and a plurality of second fixing columns; the inner surface of the end of the first fixing column away from the bottom wall is convex The outer surface of the end of the second fixing column away from the bottom wall protrudes to form a limiting part that is engaged with the locking part of the first fixing column and is provided with a number of first grooves, two The bracket fixes both ends of the single battery in the corresponding storage tube through the fastening of the clamping portion of the first fixing column and the limiting portion of the second fixing column.

As an improvement of the battery module of the present invention, the surface of the first end cover is provided with a plurality of first through holes for the screw to pass through, and the second end cover is exactly the same as the first end cover; The bottom wall of each bracket is provided with a second through hole at the axial center of each storage tube for the electrodes of the single battery to pass through, and each second through hole communicates through the storage groove; The welding part corresponding to the second through hole and used to connect with the electrode of the single battery; the surface of the bottom wall of each bracket protrudes on one side of the side wall to form several hollow positioning posts corresponding to the first through hole; An insulating pad is provided between two adjacent battery modules, between the first end cover and the battery module, and between the second end cover and the battery module, and a number of first holes corresponding to the first through holes are opened on the insulating pad. Three through holes; the screw runs through the first through hole on the first end cover and the second end cover, the positioning column on each bracket and the third through hole on each insulating pad to connect the two first end covers and the second end cover. The two end covers, battery modules and insulating pads are fixed.

As an improvement of the battery module of the utility model, the side walls of each bracket are provided with several buckles and positioning pins for matching with the side plates; each side plate is set on the two side walls of the two brackets And be provided with a plurality of clamping holes and positioning holes corresponding to the buckles and positioning pins on the two brackets respectively.

As an improvement of the battery module of the present invention, two protective covers are provided on each side plate, and the two ends of the side plate and the surfaces opposite to the bracket respectively protrude to form three positioning strips parallel to each other and two The positioning bar is perpendicular to the positioning bar and is located between two adjacent positioning bars; the positioning bar and the limiting bar on each side plate form a pair of second grooves with opposite openings at both ends of the corresponding side plate and A hub, the side plate is respectively provided with a second bolt hole in each second groove; the connecting part of each manifold corresponds to the second groove in a side plate and is provided with a corresponding second bolt hole The connection part of each manifold is accommodated in the corresponding second groove in the side plate, and the manifold is fixed on the side plate through the first fixing hole of the connection part and the second bolt hole of the side plate through the screw. On the side plate; each protective cover is installed above a pair of second grooves and fixed between two positioning bars.

As an improvement of the battery module of the present invention, a first bolt hole for fixing the collecting plate is opened in the center of each side plate; the collecting plate is provided with a number of fourth passages corresponding to the first bolt hole on the side plate. Holes, through the first bolt hole on the side plate and the fourth through hole on the collection plate with screws to fix the collection plate in the middle of the side plate.

As an improvement of the battery module of the present invention, each flexible connection has a "several" shape structure, and the two ends of each flexible connection are respectively attached to the surface of the connecting part of the corresponding manifold, and the two ends of the flexible connection A second fixing hole corresponding to the first fixing hole is opened respectively, and each flexible connection is fixed on the corresponding two manifolds by passing through the first fixing hole and the second fixing hole with screws.

As an improvement of the battery module of the present invention, a pair of mounting grooves and two mounting holes are opened on the surface of the first end cover, and each mounting hole is correspondingly located in a mounting groove; each busbar includes a The fixed end in the installation groove of the first end cover and the terminal perpendicular to the fixed end and used for electrical connection with a manifold, the fixed end is provided with a third fixed hole corresponding to the installation hole of the first end cover, so The terminal is attached to the connecting portion corresponding to the manifold and defines a fourth fixing hole corresponding to the first fixing hole.

Compared with the prior art, the beneficial effect of the battery module of the utility model is that the structure of the battery module is compact and simple, and it is easy to be stacked and connected in series or used alone. The structure is light and reliable, and the cost is effectively reduced, thereby improving the performance of the battery module.

【Description of drawings】

Fig. 1 is a three-dimensional exploded view of the battery module of the present invention;

FIG. 2 is an exploded perspective view of the battery module shown in FIG. 1;

Fig. 3 is a perspective view of the bracket shown in Fig. 1;

Fig. 4 is a three-dimensional cross-sectional view of a pair of brackets shown in Fig. 1 being interlocked;

Fig. 5 is a perspective view of the battery module of the present invention with the protective cover and the collection board removed.

【detailed description】

In order to make the purpose, technical solution and beneficial technical effects of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the utility model, not for limiting the utility model.

Please refer to Fig. 1, a battery module 100 provided by the utility model includes end caps 10 located at both ends of the battery module, several battery modules 20, series components 30, a collection board 40 fixed on the battery module 20 and used to The screw 50 that fixes the battery module 20 .

The end cover 10 includes a first end cover 11 and a second end cover 12 . A pair of mounting grooves 101 , a plurality of first through holes 102 through which the screw rod 50 penetrates, and two mounting holes 103 are defined on the surface of the first end cover 11 , and each mounting hole 103 is located in one mounting groove 101 . The second end cap 12 is identical to the first end cap 11 . In this embodiment, the end cover 10 is made of glass fiber, which effectively reduces the cost and weight of the battery module 100 and improves the insulation safety performance of the battery module 100 .

Please refer to FIG. 1 to FIG. 4 , each battery module 20 includes a number of single cells 21 , a pair of brackets 22 for installing the single cells 21 , a side plate 23 connecting the two brackets 22 , and a number of cells connected to the single cells 21 . The electrodes are electrically connected and fixed to the bus plate 24 on the side plate 23 and several protective covers 25 installed on the side plate 23 . In this embodiment, the single battery 21 is cylindrical in shape.

Each bracket 22 includes a bottom wall 220 and a side wall 221 extending from an edge of the bottom wall 220 . The surface of the bottom wall 220 protrudes on one side of the side wall 221 to form a plurality of storage tubes 222 for fixing one end of the single battery 21, a plurality of hollow fixing posts 223 for fastening two brackets 22, and a plurality of receiving cylinders 223 for fastening two brackets 22. The partition 224 in the center of the wall 220 and a plurality of hollow positioning posts 225 corresponding to the first through hole 102 , and a plurality of criss-cross receiving grooves 226 are defined on the surface of the bottom wall 220 opposite to the receiving cylinder 222 . The side wall 221 of each bracket 22 is provided with a plurality of buckles 2210 and positioning pins 2211 for matching with the side plate 23 . The bottom wall 220 of each bracket 22 is provided with a second through hole 2220 at the axial center of each receiving cylinder 222 for the electrodes of the single battery 21 to pass through, and each second through hole 2220 on each bracket 22 passes through The receiving groove 226 is connected. In this embodiment, the storage cylinders 222 on each bracket 22 are arranged in a matrix, and the storage cylinders 222 located on both sides of the partition 224 are symmetrical to the partition 224 .

The shape of the fixing column 223 is cylindrical and includes a plurality of first fixing columns 2230 and a plurality of second fixing columns 2231. side, and the axes of the first fixing column 2230 and the second fixing column 2231 are symmetrical with respect to the partition 224 . The inner surface of the first fixing column 2230 away from the bottom wall 220 protrudes to form a clamping portion 2232 , and the outer surface of the second fixing column 2231 away from the bottom wall 220 protrudes to form a locking portion 2230 . The clamping portion 2232 of the two brackets 22 engages the clamping portion 2232 of the first fixing column 2230 with the limiting portion 2233 of the second fixing column 2231 to connect the two ends of the single battery 21 It is fixed in the corresponding storage tube 222. The end of the second fixing column 2231 away from the bottom wall 220 is provided with a plurality of first grooves 2234, so that the stop portion 2233 of the second fixing column 2231 has good elasticity, which is beneficial to connect the first fixing column 2230 with the second fixing column. Post 2231 snaps together.

The positioning posts 225 are cylindrical in shape, and one of the positioning posts 225 is disposed in the middle of the partition 224 , and the other positioning posts 225 are evenly distributed on both sides of the partition 224 .

The side plate 23 is arranged on the two side walls 221 of the two brackets 22 and is provided with a plurality of snap holes 230 and positioning holes 231 corresponding to the buckles 2210 and the positioning pins 2211 on the two brackets 22 respectively, and the side plate 23 A first bolt hole 232 for fixing the collection plate 40 is opened in the center of the top. The side plate 23 is fixed on the two side walls 221 of the two brackets 22 through the cooperation of the buckle 2210 and the locking hole 230 and the positioning pin 2211 and the positioning hole 231 . The two ends of the side plate 23 are respectively provided with three positioning strips 233 parallel to each other and two spacer strips perpendicular to the positioning strips 233 and located between two adjacent positioning strips 233 on the surface opposite to the bracket 22 234. The positioning bar 233 and the limit bar 234 on each side plate 23 respectively form a pair of opening opposite second grooves 235 and a wire collecting groove 236 at the two ends of the corresponding side board 23, and the two wire collecting grooves 236 are located at two ends. A second bolt hole 237 is defined between the second grooves 235 and in each second groove 235 of the side plate 23 .

The manifold 24 is installed on the surface of the bottom wall 220 of the bracket 22 opposite to the receiving cylinder 22, wherein the bracket 22 close to the second end cover 12 is provided with a manifold that covers the entire surface of the bottom wall 220 of the bracket 22 24 to connect the single cells 21 on both sides of the separator 224 in series and parallel, and the other brackets 22 are provided with a bus plate 24 on both sides of the separator 224 to connect the single cells 21 on both sides of the separator 224 in parallel. . Specifically, each manifold 24 includes a manifold main body 240 accommodated in the receiving groove 226 on the bracket 22 and a connecting portion 241 extending from one edge of the manifold main body 240 to form a connection with the side plate 23 . The shape of the manifold 24 corresponds to the shape of the receiving groove 226 , which effectively reduces the weight and material cost of the battery module 100 , thereby improving the performance of the battery module 100 . The bus body 240 of each bus board 24 is provided with a plurality of welding portions 242 corresponding to the second through holes 2220 and used for connecting with the electrodes of the single cells 21 . The connecting portion 241 of each manifold defines a first fixing hole 243 corresponding to the second bolt hole 237 corresponding to the second groove 235 in the side plate 23 . The connecting portion 241 of each manifold 24 is accommodated in the corresponding second groove 235 in the side plate 23, and the manifold is connected by a screw passing through the first fixing hole 243 of the connecting portion 241 and the second bolt hole 237 of the side plate 23. 24 is fixed on the side plate 23.

Each protective cover 25 is installed above a pair of second grooves 235 and fixed between two positioning bars 233, that is, each side plate 23 is provided with two protective covers 25, and the function of the protective covers 25 is The insulation isolates the conductive elements located in the second groove 235 .

Please refer to FIG. 1 and FIG. 5 , the series assembly 30 includes a plurality of flexible connections 301 connecting two adjacent battery modules 20 , a plurality of insulating pads 302 and a pair of bus bars 303 mounted on the first end cover 11 .

Two flexible connections 301 are provided between two adjacent battery modules 20, and the two flexible connections 301 are respectively connected to the bus plate 24 on the same side of the separator 224 in the two adjacent battery modules 20, so that the two adjacent batteries The single cells in the module 20 located on the same side of the separator 224 are connected in series. Specifically, each flexible connection 301 is a "several"-shaped structure to improve shock resistance and reliability. A second fixing hole 3011 corresponding to the first fixing hole 243 is respectively opened at both ends of the two ends, and each flexible connection 301 is fixed on the corresponding two manifolds 24 by passing through the first fixing hole 243 and the second fixing hole 3011 . Fixing the flexible connection 301 above the manifold 24 not only facilitates the electrical connection, but also saves the space of the battery module 100 , thereby improving the performance of the battery module 100 . In this embodiment, the flexible connection 301 is made of copper sheet.

An insulating pad 302 is provided between two adjacent battery modules 20 , between the first end cover 11 and the battery module 20 and between the second end cover 12 and the battery module 20 , and each insulating pad 302 is provided with a There are several third through holes 3021 corresponding to the first through holes 102 . The insulating pad 302 plays the role of insulation and shockproof.

The two bus bars 303 are respectively electrically connected to a bus plate 24 close to the first end cover 11 . Each busbar 303 includes a fixed end 3031 received in the installation slot 101 of the first end cover 11 and a terminal 3032 perpendicular to the fixed end 3031 and used for electrical connection with a busbar 24 . A third fixing hole 3033 corresponding to the mounting hole 103 on the end cover is opened on the fixing end. The terminal 3032 is attached to the connecting portion 241 corresponding to the manifold 24 and defines a fourth fixing hole 3034 corresponding to the first fixing hole 243 .

The battery module 20 is stacked between the first end cover 11 and the second end cover 12 , and the bus plate 24 is facing the first end cover 11 or the second end cover 12 , one of which is close to the bracket of the second end cover 12 22 is provided with a manifold 24 covering the surface of the bottom wall 220 of the entire support 22, and each of the other supports 22 is provided with a manifold 24 on both sides of the partition 224, and each flexible connection 301 connects two adjacent The busbar 24 in the battery module 20 is used to connect the single cells 21 on the same side of the separator 224 in two adjacent battery modules 20 in series, and the two bus bars 303 are respectively electrically connected to a busbar near the first end cover 11 24 and serve as the positive and negative poles of the battery module 100. In this embodiment, the number of battery modules 20 stacked between the first end cover 11 and the second end cover 12 is at least one, and the battery modules 20 are stacked into a rectangular parallelepiped, which effectively improves assembly performance.

Please refer to FIG. 1 , the collection board 40 is installed on the side plate 23 of the battery module 20 and attached to the middle of the side plate 23 . Specifically, the collection plate 40 is provided with a number of fourth through holes 401 corresponding to the first bolt holes 232 on the side plates 23, and the screws pass through the first bolt holes 232 on the side plates 23 and the fourth through holes 401 on the collection plate 40. The holes 401 fix the collection plate 40 . In this embodiment, the collection board 40 is connected to the battery module 20 through wires, and the wires connecting the collection board 40 and the battery module are accommodated in the wire collecting groove 236 provided on the side plate 23 .

Please refer to FIG. 1, the screw 50 passes through the first through hole 102 on the two end caps 10, the positioning post 225 on each bracket 22 and the third through hole 3021 on each insulating pad 302 to connect the two end caps. 10. The battery module 20 and the insulating pad 302 are fixed.

When assembling, firstly, each battery module 20 is assembled, and the single battery 21 is installed in the storage tube 222 in the bracket 22, and the single battery 21 on both sides of the separator 224 in each pair of brackets 22 is ensured. The positive and negative poles are facing oppositely. After each pair of brackets 22 is fastened, the side plates 23 are correspondingly buckled on the two side walls 221 of each pair of brackets 22, and then the manifold 24 is installed into the receiving groove 226 of the corresponding bracket 22 and The welding part 242 of the manifold 24 corresponds to the second through hole 2220 on the bracket 22 and the connection part 241 of the manifold 24 is accommodated in the second groove 235 on the side plate 23, and finally the welding part 242 of the manifold 24 and the unit The electrodes of the bulk battery 21 are welded and fixed to complete the assembly of the battery module 20; secondly, the assembled battery modules 20 are connected in series, and two busbars 303 are installed on one end cover 10 first, and the end cover 10 with the busbars 303 is installed It is the first end cover 11, and a certain number of battery modules 20 are stacked between the two end covers 10 as required, and an insulating pad 302 is placed between two adjacent battery modules 20, and the two end covers 10 An insulating pad is also placed between the battery module 20, and only one bus plate 24 is installed on the bracket 22 close to the second end cover 12, and the bus bar 24 on the bracket 22 close to the second end cover 12 is electrically connected The single cells 21 on both sides of the separator 224, and then the screw 50 passes through the first through hole 102 on the two end caps 10, the positioning column 225 on each bracket 22 and the third through hole 3021 on each insulating pad 302 Fix the two end covers 10, the battery module 20 and the insulating pad 302, and finally fix each soft connection 301 and the two busbars 303 to the connecting part 241 of the corresponding busbar 24 by screws to complete the series connection; finally, The collecting plate 40 and the protective cover 25 are respectively fixed on the side plate 23 and between the two positioning bars 233 to complete the assembly of the battery module 100 .

The utility model is not limited to the description in the description and the implementation, so those skilled in the art can easily realize additional advantages and modifications, so without departing from the spirit and general concept defined by the claims and equivalent scope Without limitation, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (8)

1. A battery module, comprising end caps located at both ends of the battery module, several battery modules, series components, an acquisition plate fixed on the battery module, and some screw rods for fixing the battery module; it is characterized in that: the end caps The cover includes a first end cover and a second end cover; each battery module includes a number of single cells, a pair of brackets for installing the single cells, a side plate connecting the two brackets, and a number of electrodes connected to the single cells The bus plate is electrically connected and fixed on the side plate; each bracket includes a bottom wall and a side wall extending from the edge of the bottom wall; the surface of the bottom wall protrudes on one side of the side wall to form a plurality of A storage tube at one end of the bulk battery, a number of hollow fixing posts for fastening two brackets, and a partition at the center of the bottom wall, and a number of criss-cross storage grooves are provided on the surface of the bottom wall opposite to the storage tube The side plates are arranged on the two side walls of the two brackets; the manifold is installed on the surface of the bottom wall of the bracket opposite to the storage tube, and each manifold includes a storage tank accommodated on the bracket The bus body and the connection part extending from one side edge of the bus body to form a connection with the side plate; the series assembly includes a number of flexible connections electrically connecting two adjacent battery modules and a pair of flexible connections mounted on the first end cover There are two flexible connections between two adjacent battery modules; the battery modules are stacked between the first end cover and the second end cover, and the bus plate is facing the first end cover or the second end cover. End cover, one of the brackets close to the second end cover is provided with a manifold for electrically connecting the single cells on both sides of the partition, and other brackets are provided with a manifold on both sides of the partition, each flexible connection Respectively connect the busbars in two adjacent battery modules to connect the single cells on the same side of the separator in the two adjacent battery modules in series, and the two busbars are respectively electrically connected to a busbar near the first end cover and used as The positive and negative terminals of the battery module. 2. The battery module according to claim 1, wherein the shape of the fixing column is cylindrical and includes a plurality of first fixing columns and a plurality of second fixing columns; the first fixing column is far away from the bottom wall The inner surface of one end protrudes to form a clamping part, and the outer surface of the end of the second fixing column away from the bottom wall protrudes to form a limiting part that is buckled with the clamping part of the first fixing column and is provided with a plurality of first In the groove, the two brackets fix the two ends of the single battery in the corresponding storage tube through the fastening of the clamping part of the first fixing post and the limiting part of the second fixing post. 3. The battery module according to claim 2, characterized in that: the surface of the first end cap is provided with a plurality of first through holes for the screw to pass through, and the second end cap and the first end cap The cover is exactly the same; the bottom wall of each bracket is provided with a second through hole at the axial center of each receiving cylinder for the electrodes of the single battery to pass through, and each second through hole is connected through the receiving groove; each manifold The bus body is provided with a number of welding parts corresponding to the second through holes and used to connect with the electrodes of the single battery; the surface of the bottom wall of each bracket is raised on one side of the side wall to form a number of hollow holes corresponding to the first through holes An insulating pad is provided between two adjacent battery modules, between the first end cover and the battery module, and between the second end cover and the battery module. The third through hole of a through hole; the screw passes through the first through hole on the first end cover and the second end cover, the positioning column on each bracket and the third through hole on each insulating pad to connect the two second through holes The first end cover and the second end cover, the battery module and the insulating pad are fixed. 4. The battery module according to claim 3, characterized in that: the side walls of each bracket are provided with a number of buckles and positioning pins for matching with the side plates; The two side walls are provided with a plurality of clamping holes and positioning holes respectively corresponding to the buckles and positioning pins on the two brackets. 5. The battery module according to claim 4, characterized in that: each side plate is provided with two protective covers, and the two ends of the side plate and the surfaces opposite to the bracket respectively protrude to form three mutually parallel The positioning strip and two limiting strips perpendicular to the positioning strip and located between two adjacent positioning strips; the positioning strip and the limiting strip on each side plate form a pair of opposite openings at both ends of the corresponding side plate The second groove and a collecting groove, the side plate is respectively provided with a second bolt hole in each second groove; the connecting part of each manifold corresponds to the second groove in a side plate and is provided with a Corresponding to the first fixing hole of the second bolt hole, the connecting part of each manifold is accommodated in the corresponding second groove in the side plate, and the first fixing hole of the connecting part and the second bolt hole of the side plate are passed through by screws The manifold is fixed on the side plate; each protective cover is installed above the pair of second grooves and fixed between the two positioning bars. 6. The battery module according to claim 4, characterized in that: a first bolt hole for fixing the collection board is opened in the center of each side plate; the collection board is provided with a number of first bolts on the corresponding side boards The fourth through hole of the hole, through the first bolt hole on the side plate and the fourth through hole on the acquisition plate by screws, the acquisition plate is fixed on the middle part of the side plate. 7. The battery module according to claim 5, characterized in that: each flexible connection is a "several"-shaped structure, and the two ends of each flexible connection are respectively attached to the surface of the connecting part of the corresponding manifold, and Two ends of the flexible connection are respectively provided with a second fixing hole corresponding to the first fixing hole, and each flexible connection is fixed on the corresponding two manifolds through screws passing through the first fixing hole and the second fixing hole. 8. The battery module according to claim 5, wherein a pair of mounting grooves and two mounting holes are provided on the surface of the first end cover, and each mounting hole is correspondingly located in a mounting groove; each The bus bar includes a fixed end accommodated in the installation groove of the first end cover and a terminal perpendicular to the fixed end and used for electrical connection with a manifold, and the fixed end is provided with a first end corresponding to the installation hole of the first end cover. Three fixing holes, the terminal is attached to the connecting part corresponding to the manifold and a fourth fixing hole corresponding to the first fixing hole is opened.