CN208256764U - Cover assembly and battery modules - Google Patents

Abstract

The utility model provides an upper cover assembly and a battery module. The upper cover assembly includes: a cover plate with a first side and a second side; a plurality of bus bars; and a cover element. The cover plate is provided with: a plurality of first through holes respectively penetrating through the cover plate along the height direction; and first grooves formed on the first side of the cover plate and communicated with the corresponding first through holes. The plurality of bus bars are fixed on the second side of the cover plate, and each bus bar is at least partially exposed from the corresponding first through hole. The cover element is at least accommodated and fixed in the first groove of the cover plate, so as to cover the part of each bus bar exposed in the corresponding first through hole. Since the cover plate is formed with the first groove, the overall thickness of the cover plate and the covering element along the height direction is small; at the same time, because the covering element only needs to cover the part of each bus bar exposed to the corresponding first through hole, there is no need to The entire cover plate is covered, thereby reducing the overall volume of the covering element, so that the upper cover assembly is small in size and light in weight.

Description

Cover assembly and battery module

technical field

The utility model relates to the technical field of batteries, in particular to an upper cover assembly and a battery module.

Background technique

In new energy vehicles, the battery module is usually used as the power source of the new energy vehicle, and in order to provide power for the new energy vehicle, multiple batteries in the battery module need to be electrically connected through a certain number of bus bars (Busbar). connection (that is, series and/or parallel), and at the same time, in order to ensure the stability of the battery module when it supplies power to new energy vehicles, each bus bar needs to be fixed reliably.

At present, in order to ensure the fixing reliability of the bus bars, each bus bar is usually fixed to the upper cover assembly. The upper cover assembly of the existing battery module generally includes a cover plate, a plurality of bus bars fixed on the cover plate, and a cover element for covering each bus bar, and each bus bar is fixed between the cover plate and the cover element. However, this setting method will have the following two problems: (1) the thickness of the cover plate and the cover element will affect the overall height of the battery module, which is not conducive to improving the volumetric energy density of the battery module; (2) Since all the bus bars are exposed on the cover plate, in order to externally insulate each bus bar, a cover plate with a large enough area is required to completely cover all the bus bars, which not only increases the overall size and weight of the battery module, The energy density of the battery module is reduced, and the manufacturing cost of the battery module is also increased.

Utility model content

In view of the problems existing in the background technology, the purpose of this utility model is to provide an upper cover assembly and a battery module. The upper cover assembly ensures the fixing reliability of each bus bar and is small in size and light in weight. When the upper cover assembly is used When used in the battery module, the overall size of the battery module is reduced, and the weight of the battery module is reduced, thereby improving the energy density of the battery module and reducing the manufacturing cost of the battery module.

In order to achieve the above object, in the first aspect, the utility model provides an upper cover assembly, which includes: a cover plate with a first side in the height direction and a second side opposite to the first side; a strip, fixed on the cover plate; and a cover element, covering each bus bar. Wherein, the cover plate is provided with: a plurality of first through holes respectively penetrating the cover plate along the height direction; and first grooves formed on the first side of the cover plate and communicated with the corresponding first through holes. The plurality of bus bars are fixed on the second side of the cover plate, and each bus bar is at least partially exposed from the corresponding first through hole. The cover element is at least accommodated and fixed in the first groove of the cover plate, so as to cover the part of each bus bar exposed in the corresponding first through hole.

In the second aspect, the utility model provides a battery module, which includes a plurality of batteries arranged side by side along the length direction and the upper cover assembly according to the first aspect of the utility model, each bus bar of the upper cover assembly is respectively fixed connected to corresponding batteries to electrically connect the plurality of batteries together.

The beneficial effects of the utility model are as follows:

In the upper cover assembly according to the present invention, since each bus bar is fixed on the second side of the cover plate, the cover plate can ensure that each bus bar is firmly fixed, thereby ensuring the fixing reliability of each bus bar. And since the cover plate is formed with the first groove for accommodating the cover element, the overall thickness of the cover plate and the cover element in the height direction is small; The part of the hole is sufficient, so that the entire cover plate does not need to be covered, thereby reducing the overall volume of the cover element, so that the upper cover assembly is small in size and light in weight. When the upper cover assembly is applied to the battery module, the first through hole of the cover plate facilitates the welding between each bus bar and the corresponding battery, and the use of the upper cover assembly reduces the overall size of the battery module and reduces the weight of the battery. reduce the weight of the module, thereby increasing the energy density of the battery module and reducing the manufacturing cost of the battery module.

Description of drawings

Fig. 1 is an exploded view of the upper cover assembly according to the present invention.

FIG. 2 is an assembly diagram of FIG. 1 .

Fig. 3 is a perspective view of the cover plate in Fig. 1 viewed from the front.

Fig. 4 is a perspective view of the cover plate in Fig. 1 viewed from the back.

FIG. 5 is a perspective view of the circuit board in FIG. 1 .

FIG. 6 is a modified example of the cover element in FIG. 1 .

Fig. 7 is a modified example of the cover plate in Fig. 3 .

FIG. 8 is another modified example of the covering element in FIG. 1 , and the covering element cooperates with the cover plate in FIG. 7 .

Fig. 9 is an exploded view of the battery module according to the present invention.

Wherein, the reference signs are explained as follows:

1 Battery 219 Rib

2 Upper cover assembly 22 Bus bar

21 Cover 23 Cover element

211 First through hole 231 Covering part

21A First groove 232 Connecting part

21B The second groove 233 The first receiving part

213 First stopper part 234 Second receiving part

214 Second stop 24 Circuit board

2141 Main body 241 Pilot hole

2142 Extension 3 side panel

215 The first limiting wall 31 Buckling hole

216 The height direction of the second limiting wall H

217 Guide column L length direction

218 Holder W Width direction

Detailed ways

The upper cover assembly and the battery module according to the present invention will be described in detail below with reference to the accompanying drawings.

Firstly, the upper cover assembly 2 of the first aspect of the present utility model will be described.

Referring to FIGS. 1 to 9 , the upper cover assembly 2 according to the present invention includes: a cover plate 21 having a first side in the height direction H (ie, the front side of the cover plate 21 ) and a second side opposite to the first side (that is, the back of the cover plate 21 ); a plurality of bus bars 22 fixed on the cover plate 21 ; and a cover element 23 covering each bus bar 22 . Wherein, the cover plate 21 is provided with: a plurality of first through holes 211, respectively penetrating the cover plate 21 along the height direction H; and a first groove 21A, formed on the first side of the cover plate 21 and communicating with the corresponding first through Hole 211. The plurality of bus bars 22 are fixed on the second side of the cover plate 21 , and each bus bar 22 is at least partially exposed from the corresponding first through hole 211 . The cover element 23 is at least accommodated and fixed in the first groove 21A of the cover plate 21 to cover the portion of each bus bar 22 exposed in the corresponding first through hole 211 .

In the upper cover assembly 2 according to the present utility model, since each bus bar 22 is fixed on the second side of the cover plate 21, the cover plate 21 can ensure that each bus bar 22 is firmly fixed, thereby ensuring that each bus bar 22 fixed reliability. Since the cover plate 21 is formed with the first groove 21A for accommodating the cover element 23, the overall thickness of the cover plate 21 and the cover element 23 along the height direction H is small; Only the part exposed to the corresponding first through hole 211 is sufficient, so that there is no need to cover the entire cover plate 21, thereby reducing the overall volume of the cover element 23, so the upper cover assembly 2 is small in size and light in weight. When the upper cover assembly 2 is applied to the battery module, the first through hole 211 of the cover plate 21 facilitates the welding between each bus bar 22 and the corresponding battery, and the use of the upper cover assembly 2 reduces the overall size of the battery module. The size and the weight of the battery module are reduced, thereby improving the energy density of the battery module and reducing the manufacturing cost of the battery module.

In order to minimize the thickness dimension of the upper cover assembly 2 along the height direction H, the depth of the first groove 21A in the height direction H is not less than the thickness of the cover element 23 in the height direction H, that is, the cover element 23 does not protrude on the first side of the cover plate 21 .

The cover element 23 can be bonded to the first groove 21A of the cover plate 21 and/or the part of the bus bar 22 exposed to the cover plate 21 through the first through hole 211 by using fixing glue (such as double-sided tape). Among them, in order to improve the bonding force of the fixing glue between the covering element 23, the cover plate 21 and the bus bar 22, it is necessary to ensure the cleanliness of the surface of the bus bar 22 and the inner surface of the first groove 21A, and at the same time pay attention to the fixing The use temperature of the glue.

In an embodiment, there may be multiple first grooves 21A, and each first groove 21A may only communicate with a corresponding first through hole 211 , and the number of the covering element 23 and the first grooves 21A is consistent. In other words, there is a one-to-one correspondence between the first groove 21A and the covering element 23 and the first through hole 211 .

In another embodiment, referring to FIG. 1 to FIG. 4 , the plurality of first through holes 211 can be arranged in at least two rows along the width direction W, and the plurality of first through holes in the same row in the width direction W 211 are spaced along the length direction L. Correspondingly, there may be at least two first grooves 21A, the at least two first grooves 21A are arranged at intervals along the width direction W, and each first groove 21A extends along the length direction L to communicate with the width direction W A plurality of first through holes 211 in the same row.

In this embodiment, the cover element 23 and the first groove 21A may be consistent in number, and since each first groove 21A communicates with a plurality of first through holes 211 at the same time, the first groove 21A and the cover element 23 are consistent with each other. The first through holes 211 are not in one-to-one correspondence. Referring to FIG. 1 , all parts of each covering element 23 in the length direction L may have the same size in the width direction W, and at this time, each covering element 23 may be a long rectangular structure.

In order to save the material of the covering element 23 and reduce the weight of the covering element 23, referring to FIG. The part exposed to the corresponding first through hole 211; and a plurality of connecting parts 232, arranged at intervals along the length direction L, each connecting part 232 connects two adjacent covering parts 231, and each connecting part 232 is in the width direction W The size of is smaller than the size of the covering portion 231 in the width direction W.

In this embodiment, the cover element 23 and the first groove 21A may be inconsistent in number, and since each first groove 21A communicates with a plurality of first through holes 211 at the same time, the first groove 21A, the cover element 23 And the first through holes 211 are not in one-to-one correspondence. Referring to FIG. 8 , the cover element 23 may have: first receiving portions 233 arranged at intervals along the width direction W and accommodated in the first groove 21A; and second receiving portions 234 connecting two adjacent first receiving portions 233 . Wherein, since the two adjacent first receiving portions 233 in the width direction W are connected into one body by the second receiving portion 234, the number of components of the upper cover assembly 2 is thus reduced, and the assembly efficiency of the upper cover assembly 2 is improved. .

It is supplemented here that, based on the position and quantity of the second receiving part 234, the first receiving part 233 and the second receiving part 234 of the cover element 23 can be formed into a "back"-shaped structure (as shown in FIG. 8 ) or an "H" shape. "type structure.

7, the cover plate 21 can also be provided with: a second groove 21B formed on the first side of the cover plate 21 and extending along the width direction W to communicate with two adjacent first grooves 21A and accommodate the cover element 23 of the second housing portion 234 . Wherein, since the second receiving portion 234 of the covering element 23 is accommodated in the second groove 21B of the cover plate 21 , the overall thickness of the cover plate 21 and the covering element 23 along the height direction H is reduced.

Referring to FIGS. 2 to 4 , the cover plate 21 may have: a first stop portion 213 located above each bus bar 22 , and the first through hole 211 passes through the first stop portion 213 along the height direction H; Two stoppers 214 protrude downward from the first stopper 213 along the height direction H, and one end of the second stopper 214 away from the first stopper 213 is stopped under each bus bar 22 and connected to the first stopper 214 A stop portion 213 clamps and fixes each bus bar 22 together. It is supplemented here that the first stop portion 213 is the bottom of the first groove 21A.

The second stop portion 214 of the cover plate 21 can be an elastic buckle. Wherein, the second stopper 214 clamps and fixes each bus bar 22 together with the first stopper 213 based on its own elasticity, thereby ensuring the fixing reliability of each bus bar 22 and facilitating the connection between each bus bar 22 and the cover plate 21. assembly between.

It is supplemented here that, for a single bus bar 22, one first stopper 213 can cooperate with multiple second stoppers 214 at the same time to clamp and fix the bus bar 22, and the second stopper 214 The specific number can be adjusted according to the actual situation, as long as the second stop portion 214 can clamp and fix the bus bar 22 together with the corresponding first stop portion 213 .

Specifically, a plurality of second stop portions 214 for clamping and fixing each bus bar 22 together with corresponding first stop portions 213 may be located on both sides of the bus bar 22 along the width direction W; or, for A plurality of second stoppers 214 clamping and fixing each bus bar 22 together with the corresponding first stoppers 213 can be located on both sides of the bus bar 22 along the length direction L; The stoppers 213 clamp and fix each bus bar 22 together and the plurality of second stoppers 214 are located on both sides of the bus bar 22 along the width direction W and on both sides of the bus bar 22 along the length direction L.

2 to 4, the second stopper 214 may have: a main body 2141 protruding downward from the first stopper 213 along the height direction H; and an extension 2142 formed on the main body 2141 away from the first stop One end of the blocking portion 213 , and the extension portion 2142 stops below each bus bar 22 and clamps and fixes each bus bar 22 together with the first stopping portion 213 .

Referring to FIG. 2 to FIG. 4 , the cover plate 21 may further include: a first limiting wall 215 protruding downward from the first stop portion 213 along the height direction H and located on both sides of each bus bar 22 along the length direction L. Referring to FIGS. Here, the function of the first limiting wall 215 of the cover plate 21 is to limit the installation position of each bus bar 22 in the longitudinal direction L, that is, each bus bar 22 is arranged between the two first limiting walls 215 in the longitudinal direction L. between.

The first limiting wall 215 can cooperate with the second stop portion 214 to fix and install each bus bar 22 , and the specific matching form is as follows.

The second stop portion 214 may be located on both sides of each bus bar 22 along the width direction W. As shown in FIG. At this time, the first limiting wall 215 defines the installation position of each bus bar 22 in the length direction L, and the second stopper 214 clamps and fixes each busbar 22 together with the corresponding first stopper 213 . The installation position of each bus bar 22 in the width direction W is also defined.

The second stop portion 214 can be located on both sides of each bus bar 22 along the length direction L, and the second stop portion 214 is formed on the first limiting wall 215, that is, the main body portion 2141 of the second stop portion 214 is the second stopper portion 214. A portion of a limiting wall 215 , and the extension portion 2142 of the second stop portion 214 extends to the bottom of each bus bar 22 along the length direction L. At this time, the first limiting wall 215 defines the installation position of each bus bar 22 in the length direction L, and the second stopper portion 214 clamps and fixes each bus bar 22 together with the corresponding first stopper portion 213 .

The second stopper portion 214 may be located on both sides of each bus bar 22 in the width direction W and on both sides of each bus bar 22 in the length direction L, and the second stopper portion 214 in the length direction L is formed on the second stopper portion 214. A limit wall 215, that is, the main body 2141 of the second stopper 214 in the length direction L can be a part of the first limiter wall 215, and the extension of the second stopper 214 in the length direction L 2142 extends to the bottom of each bus bar 22 along the length direction L. At this time, all the second stop portions 214 clamp and fix each bus bar 22 together with the corresponding first stop portion 213 , which improves the fixing reliability of each bus bar 22 . The first limiting wall 215 defines the installation position of each bus bar 22 in the length direction L, and the second stop portion 214 in the width direction W clamps and fixes each bus bar together with the corresponding first stop portion 213 22 while defining the installation position of each bus bar 22 in the width direction W, thereby improving the accuracy of the installation position of each bus bar 22 on the upper cover 2 .

Referring to FIG. 2 to FIG. 4 , the cover plate 21 may further include: a second limiting wall 216 protruding downward from the first stop portion 213 along the height direction H and located on both sides of each bus bar 22 along the width direction W. Here, the function of the second limiting wall 216 of the cover plate 21 is to limit the installation position of each bus bar 22 in the width direction W, that is, each bus bar 22 is arranged between the two second limiting walls 216 in the width direction W. between.

The second limiting wall 216 can be used in conjunction with the second stop portion 214 to fixedly install each bus bar 22, and the cooperation form of the second limiting wall 216 and the second stop portion 214 is the same as that of the first limiting wall 215 and the first limiting wall 215. The matching form of the second stop portion 214 is similar, and the details are as follows.

The second stop portion 214 can be located on both sides of each bus bar 22 along the length direction L. As shown in FIG. At this time, the second limiting wall 216 defines the installation position of each bus bar 22 in the width direction W, and the second stopper 214 clamps and fixes each busbar 22 together with the corresponding first stopper 213 . The installation position of each bus bar 22 in the length direction L is also defined.

The second stop portion 214 can be located on both sides of each bus bar 22 along the width direction W, and the second stop portion 214 is formed on the second limiting wall 216, that is, the main body portion 2141 of the second stop portion 214 can be A part of the second limiting wall 216 , and the extension portion 2142 of the second stop portion 214 extends to the bottom of each bus bar 22 along the width direction W. At this time, the second limiting wall 216 defines the installation position of each bus bar 22 in the width direction W, and the second stop portion 214 and the corresponding first stop portion 213 clamp and fix each bus bar 22 together.

The second stopper portion 214 may be located on both sides of each bus bar 22 in the length direction L and on both sides of each bus bar 22 in the width direction W, and the second stopper portion 214 in the width direction W is formed on the second stopper portion 214. The second limiting wall 216, that is, the main body portion 2141 of the second stop portion 214 in the width direction W may be a part of the second limit wall 216, and the extension of the second stop portion 214 in the width direction W 2142 extends to the bottom of each bus bar 22 along the width direction W. At this time, all the second stop portions 214 clamp and fix each bus bar 22 together with the corresponding first stop portion 213 , which improves the fixing reliability of each bus bar 22 . The second limiting wall 216 defines the installation position of each bus bar 22 in the width direction W, and the second stop portion 214 in the length direction L clamps and fixes each bus bar together with the corresponding first stop portion 213 22 while defining the installation position of each bus bar 22 in the longitudinal direction L, thereby improving the installation position accuracy of each bus bar 22 on the upper cover 2 .

In addition, the second stop portion 214 can also be used in combination with the first limiting wall 215 and the second limiting wall 216 to fix and install the bus bars 22 , as shown in FIGS. 2 to 4 .

Referring to FIG. 2 and FIG. 4 , the cover plate 21 may further have: buckling portions 218 formed at both ends of the cover plate 21 along the width direction W. Referring to FIG. When the upper cover assembly 2 is applied to the battery module, the buckling portion 218 of the cover plate 21 can be snapped together with each side plate 3 of the battery module. Wherein, the buckling portion 218 of the cover plate 21 can be an elastic buckle, and each buckling portion 218 is firmly locked with each side plate 3 based on its own elasticity.

Referring to FIG. 2 and FIG. 4 , the cover plate 21 may further have: a plurality of reinforcing ribs 219 formed on the second side of the cover plate 21 , and each reinforcing rib 219 is located between two adjacent bus bars 22 in the length direction L. Referring to FIG. When the upper cover assembly 2 is applied to the battery module, on the one hand, the multiple ribs 219 improve the rigidity of the cover plate 21 and reduce the deformation of the cover plate 21 during use; The ribs 219 also increase the creepage distance between two adjacent bus bars 22 , thus playing a role of safety protection for the battery module.

It is supplemented here that since the second stopper 214 , the first stopper wall 215 , and the second stopper wall 216 all protrude from the first stopper 213 along the height direction H and are distributed on the second side of the cover plate 21 , so the second stop portion 214 , the first limiting wall 215 , and the second limiting wall 216 all play a role similar to the reinforcing rib 219 .

Referring to FIG. 1 , the upper cover assembly 2 may further include: a circuit board 24 directly fixed on the second side of the cover plate 21 of the upper cover assembly 2 .

In order to facilitate the assembly between the upper cover assembly 2 and the circuit board 24 , the corresponding positions of the cover plate 21 and the circuit board 24 need to be provided with corresponding positioning structures. Specifically, referring to FIG. 5 , the circuit board 24 may be provided with: a guide hole 241 passing through the circuit board 24 along the height direction H. As shown in FIG. Referring to FIG. 4 , the cover plate 21 may further have: a guide post 217 formed on the second side of the cover plate 21 and inserted into the guide hole 241 of the circuit board 24 .

There are various fixing methods between the circuit board 24 and the cover plate 21. In order to ensure the fixing reliability of the circuit board 24, the circuit board 24 can be bonded to the cover plate 21 with fixing glue, or can be guided by the hot-melt cover plate 21. The post 217 is fixedly connected to the guide hole 241 of the circuit board 24 by thermal fusion of the guide post 217 .

Next, the battery module according to the second aspect of the present invention will be described.

Referring to Fig. 9, the battery module according to the present invention includes a plurality of batteries 1 arranged side by side along the length direction L and the upper cover assembly 2 according to the first aspect of the present utility model, each bus bar 22 of the upper cover assembly 2 is respectively fixed connected to corresponding batteries 1 to electrically connect the plurality of batteries 1 together.

In the battery module according to the utility model, due to the small size and light weight of the upper cover assembly 2, the overall size of the battery module is small and the weight of the battery module is light, thereby improving the energy density of the battery module, The manufacturing cost of the battery module is reduced.

Referring to FIG. 9 , the battery module may further include: two side plates 3 , respectively disposed on both sides of the plurality of batteries 1 along the width direction W and fixedly connected to the cover plate 21 of the upper cover assembly 2 .

Specifically, referring to FIG. 9 , each side plate 3 may be provided with a fastening hole 31 formed at one end of the side plate 3 close to the cover plate 21 along the height direction H and penetrating through the side plate 3 along the width direction W. The cover plate 21 may also have: buckling portions 218 formed at both ends of the cover plate 21 along the width direction W and snapped together with the buckling holes 31 of the side plates 3 .

Claims (10)

1. A top cover assembly (2), comprising: A cover plate (21) having a first side in the height direction (H) and a second side opposite to the first side; a plurality of bus bars (22), fixed on the cover plate (21); and Covering element (23), covering each bus bar (22); It is characterized in that, The cover plate (21) is provided with: a plurality of first through holes (211), respectively penetrating the cover plate (21) along the height direction (H); and a first groove (21A), formed in the first One side is connected to the corresponding first through hole (211); The plurality of bus bars (22) are fixed on the second side of the cover plate (21), and each bus bar (22) is at least partially exposed in the corresponding first through hole (211); The cover element (23) is at least accommodated and fixed in the first groove (21A) of the cover plate (21) to cover the part of each bus bar (22) exposed in the corresponding first through hole (211). 2. The upper cover assembly (2) according to claim 1, characterized in that the depth of the first groove (21A) in the height direction (H) is not less than that of the cover element (23) in the height direction (H) thickness of. 3. The upper cover assembly (2) according to claim 1, characterized in that, There are multiple first grooves (21A), and each first groove (21A) is only connected to a corresponding first through hole (211); The covering element (23) is identical in number to the first groove (21A). 4. The upper cover assembly (2) according to claim 1, characterized in that, The plurality of first through holes (211) are arranged in at least two rows along the width direction (W), and the plurality of first through holes (211) in the same row along the width direction (W) are arranged along the length direction (L) spaced apart; Correspondingly, there are at least two first grooves (21A), the at least two first grooves (21A) are arranged at intervals along the width direction (W), and each first groove (21A) is arranged along the length direction (L ) extend to communicate with the plurality of first through holes (211) in the same row in the width direction (W). 5. The upper cover assembly (2) according to claim 4, characterized in that, The covering element (23) is consistent with the first groove (21A) in number; The size of each covering element (23) in the width direction (W) is consistent. 6. The upper cover assembly (2) according to claim 4, characterized in that, The covering element (23) is consistent with the first groove (21A) in number; Each cover element (23) has: a plurality of cover parts (231), arranged at intervals along the length direction (L), each cover part (231) covers the corresponding bus bar (22) exposed to the corresponding first through hole (211 ) part; and a plurality of connection parts (232), arranged at intervals along the length direction (L), each connection part (232) connects two adjacent cover parts (231), and each connection part (232) is in the width direction The dimension in (W) is smaller than the dimension in the width direction (W) of the covering part (231). 7. The upper cover assembly (2) according to claim 4, characterized in that the cover element (23) has: first receiving portions (233), arranged at intervals along the width direction (W) and accommodated in the first grooves (21A); and the second accommodating portion (234), connecting two adjacent first accommodating portions (233). 8. The upper cover assembly (2) according to claim 7, characterized in that the cover plate (21) is further provided with: a second groove (21B), formed on the first side of the cover plate (21) and along the The width direction (W) extends to communicate with two adjacent first grooves (21A) and accommodate the second receiving portion (234) of the covering element (23). 9. A battery module, comprising a plurality of batteries (1) arranged side by side along the length direction (L), characterized in that the battery module further comprises the upper cover assembly according to any one of claims 1-8 ( 2), each bus bar (22) of the upper cover assembly (2) is respectively fixedly connected to the corresponding battery (1) so as to electrically connect the plurality of batteries (1) together. 10. The battery module according to claim 9, characterized in that the battery module further comprises: two side plates (3), respectively arranged on the sides of the plurality of batteries (1) along the width direction (W). Both sides are fixedly connected to the cover plate (21) of the upper cover assembly (2).