CN219717186U

CN219717186U - Busbar, integrated busbar and battery module

Info

Publication number: CN219717186U
Application number: CN202321331382.7U
Authority: CN
Inventors: 邱文聪; 陈智伟; 陈朝海
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-09-19
Anticipated expiration: 2033-05-29

Abstract

The utility model provides a bus bar, an integrated bus bar and a battery module, wherein the bus bar comprises a main body part, a first conductive part and a second conductive part, the first conductive part is divided into a plurality of first conductive parts which are arranged at intervals, parts between adjacent first conductive parts are hollowed out, the second conductive part is divided into a plurality of second conductive parts which are arranged at intervals, parts between adjacent second conductive parts are hollowed out, and the deformation capacity of the first conductive parts and the second conductive parts is superior to that of the first conductive parts and the second conductive parts which are not hollowed out, so that the deformation capacity of the first conductive parts and the second conductive parts is increased, the first conductive parts and the second conductive parts can be pressed conveniently during welding, the electrodes of a battery cell can be tightly attached, and the problem of poor welding between the battery cell and the bus bar can be solved.

Description

Busbar, integrated busbar and battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a busbar, an integrated busbar and a battery module.

Background

The battery module is a core component of the battery system. The battery module comprises a plurality of electric cores, and the electric cores are generally electrically connected by adopting an integrated busbar.

When the integrated busbar in the related art is assembled, due to factors such as the flatness of the integrated busbar and the height difference of the battery cells, the height difference exists between part of the battery cells and the busbar in the integrated busbar, so that the busbar is difficult to press in the welding process to be clung to the battery cells, and finally the problem of poor welding is caused.

Therefore, it is necessary to provide a bus bar, an integrated bus bar and a battery module to improve the defect.

Disclosure of Invention

The embodiment of the utility model provides a busbar, an integrated busbar and a battery module, which can be convenient for pressing the busbar to deform and cling to a battery cell, so that the problem of poor welding can be solved.

An embodiment of the present utility model provides a bus bar including:

a main body portion;

the first conductive part is arranged at one end of the main body part and is connected with the main body part, the first conductive part is provided with a plurality of first conductive sub-parts which are arranged side by side at intervals, the parts between the adjacent first conductive sub-parts are hollowed out, and the first conductive sub-parts are used for being electrically connected with the positive electrode of the battery cell; and

the second conductive part is arranged at the other end of the main body part and is connected with the main body part, the second conductive part is provided with a plurality of second conductive sub-parts which are arranged side by side at intervals, the part between the adjacent second conductive sub-parts is hollowed out, and the second conductive sub-parts are used for being electrically connected with the cathodes of the adjacent other electric cores.

In an embodiment, the first conductive portion and the second conductive portion have a height difference therebetween.

In an embodiment, the first conductive portion is coplanar with the main body portion, and the second conductive portion is recessed from one side surface of the main body portion and protrudes from an opposite side surface of the main body portion.

In one embodiment, the busbar has at least two main body parts, and the first conductive part and the second conductive part are respectively connected to opposite ends of each main body part;

wherein adjacent main body parts are mutually spaced and arranged in a staggered way.

In an embodiment, the busbar comprises at least one connecting portion, the connecting portion is disposed between two adjacent main body portions and is connected with the main body portions, and an included angle is formed between the connecting portion and the adjacent main body portions.

An embodiment of the present utility model provides an integrated busbar comprising at least one busbar unit comprising:

a bracket; and

and a plurality of bus bars as described above, the bracket wrapping the main body portion and exposing the first conductive sub-portion and the second conductive sub-portion.

In an embodiment, the bracket is provided with a plurality of first hollowed-out parts and a plurality of second hollowed-out parts, and the first hollowed-out parts are adjacent to the second hollowed-out parts and are arranged at intervals;

the support wraps the main body part, one end, close to the main body part, of the first conductive sub-part and one end, close to the main body part, of the second conductive sub-part, the first hollowed-out part is exposed out of one end, far away from the main body part, of the first conductive sub-part, and the second hollowed-out part is exposed out of one end, far away from the main body part, of the second conductive sub-part.

In an embodiment, the integrated busbar comprises at least two busbar units and a plurality of connectors, each of which is electrically connected to the busbar on two adjacent busbar units.

In one embodiment, the connector is welded to the busbar.

In an embodiment, the busbar includes a welding portion connected with the main body portion, the welding portion is welded with the connecting piece, a through hole is formed at a portion where the welding portion is connected with the connecting piece, and the bracket is exposed from the welding portion and the through hole.

In an embodiment, the bus unit further comprises:

the output busbar comprises a third conductive part, the third conductive part is provided with a plurality of third conductive parts which are arranged side by side at intervals, part of each third conductive part is hollowed out and arranged between every two adjacent third conductive parts, the third conductive parts are used for being electrically connected with the positive electrode of the electric core of the output end of the battery module, and the support wraps the output busbar and exposes the third conductive parts; and

the input busbar comprises a fourth conductive part, the fourth conductive part is provided with a plurality of fourth conductive parts which are arranged side by side at intervals, the parts between the adjacent fourth conductive parts are hollowed out, the fourth conductive parts are used for being electrically connected with the negative electrode of the electric core of the input end of the battery module, and the support wraps the input busbar and exposes the fourth conductive parts.

In one embodiment, the buss bar is integrally injection molded with the bracket.

The embodiment of the utility model also provides a battery module which comprises a plurality of electric cores arranged side by side and the integrated busbar, wherein the integrated busbar is used for electrically connecting the electric cores.

The utility model has the beneficial effects that:

in the utility model, the bus bar comprises a main body part, a first conductive part and a second conductive part, wherein the first conductive part is arranged at one end of the main body part and is connected with the main body part, the first conductive part is used for being electrically connected with the positive electrode of the battery core, the second conductive part is arranged at the opposite end of the main body part and is electrically connected with the negative electrode of the other adjacent battery core, the first conductive part is divided into a plurality of first conductive parts which are arranged at intervals, the part between the adjacent first conductive parts is hollowed out, the second conductive part is divided into a plurality of second conductive parts which are arranged at intervals, the part between the adjacent second conductive parts is hollowed out, and the deformability of the first conductive parts and the second conductive parts is better than that of the first conductive parts and the second conductive parts before being hollowed out, so that the deformability of the first conductive parts and the second conductive parts is increased, the first conductive parts and the second conductive parts can be pressed conveniently during welding, and the first conductive parts and the second conductive parts can be tightly attached to the electrodes of the battery core during welding, and the bus bar can be prevented from being well welded.

Drawings

In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an integrated busbar according to an embodiment of the present utility model;

FIG. 2 is a front view of a bus bar according to an embodiment of the present utility model;

FIG. 3 is a top view of a bus bar according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a bus bar and a battery cell connection according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of another integrated busbar according to an embodiment of the present utility model;

FIG. 6 is an exploded view of an integrated busbar according to an embodiment of the present utility model;

FIG. 7 is an exploded view of an integrated busbar according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of an output bus and an input bus according to an embodiment of the present utility model.

The names of the corresponding components in the figures are: 100-integrated busbar, 1-busbar unit, 10-cell, 101-positive, 102-negative, 11-bracket, 111-first hollow, 112-second hollow, 113-third hollow, 12-busbar, 120-main body, 121-first conductive, 1210-first conductive, 122-second conductive, 1220-second conductive, 123-welded, 1230-through hole, 13-connection, 14-input busbar, 140-input busbar body, 141-third conductive, 1410-third conductive, 15-output busbar, 150-output busbar body, 151-fourth conductive, 1510-fourth conductive, 16-output connector, 17-input connector, 2-connector.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an integrated bus bar according to an embodiment of the present utility model, and an integrated bus bar 100 includes at least one bus bar unit 1, wherein the bus bar unit 1 includes a bracket 11 and a plurality of bus bars 12, and the bus bars 12 are located in the bracket 11.

In one embodiment, the buss bar 12 is integrally injection molded with the bracket 11.

Specifically, the bus bar 12 is made of metal, and may be, but not limited to, a metal conductive material such as aluminum, copper, or nickel, or may be another non-metal conductive material. The material of the bracket 11 is an insulating material such as plastic. In the actual manufacturing process, the plurality of bus bars 12 may be placed in a mold, then a plastic material is input into the mold, and after the plastic material is cooled and demolded, the bus bar unit 1 may be formed.

Further, referring to fig. 2 and 3, fig. 2 is a front view of a bus bar according to an embodiment of the present utility model, and fig. 3 is a top view of the bus bar according to an embodiment of the present utility model, the bus bar 12 includes a main body 120, a first conductive portion 121 and a second conductive portion 122, the first conductive portion 121 is disposed at one end of the main body 120 and connected to the main body 120, and the second conductive portion 122 is disposed at an opposite end of the main body 120 and connected to the main body 120.

Referring to fig. 4, fig. 4 is a schematic diagram of connection between a busbar and a battery cell, where the battery cell 10 specifically refers to a cylindrical battery cell, the positive electrode 101 and the negative electrode 102 of the battery cell 10 are both at the same end of the cylindrical battery cell, the positive electrode 101 is a cylinder protruding from one end of the battery cell 10, the negative electrode 102 is a top cover at one end of the battery cell, the negative electrode 102 is a ring, and the positive electrode 101 is located at the center of the ring.

The first conductive portion 121 of the busbar 12 is used for electrically connecting with the positive electrode 101 of the cell 10, and the second conductive portion 122 is used for electrically connecting with the negative electrode 102 of another cell adjacent to the cell.

In one embodiment, the first conductive portion 121 is fixedly connected to the positive electrode 101 by welding, and the second conductive portion 122 is fixedly connected to the negative electrode 102 by welding.

The battery module may have a plurality of cells therein, and the plurality of cells may be arranged in the first direction Y and the second direction X. In the same busbar unit, a plurality of the busbars 12 arranged at intervals along the second direction X may connect a plurality of the cells arranged along the second direction X in series, and at least two of the busbars 12 arranged at intervals along the first direction Y may connect at least two of the cells arranged along the first direction Y in parallel.

In the embodiment of the present utility model, the first direction Y is the Y-axis direction in fig. 1, and the second direction X is the X-axis direction in fig. 1, where the first direction Y and the second direction X intersect.

In an embodiment of the present utility model, the first direction Y is perpendicular to the second direction X. In other embodiments, the included angle between the first direction Y and the second direction X may be other than right angle, which is not limited herein.

In one embodiment, as shown in fig. 2 and 3, the bus bar 12 is in a sheet shape, and the sheet structure can greatly reduce the weight of the bus bar, so that the overall weight of the battery module is reduced, and the space occupied by the bus bar in the battery module can be reduced as much as possible, which is beneficial to improving the energy density of the battery module.

In one embodiment, the body portion 120 is integrally formed with the first conductive portion 121 and the second conductive portion 122, and may be formed by stamping or other processes. In other embodiments, the main body 120, the first conductive portion 121 and the second conductive portion 122 may be formed as a split structure, and the components are connected by welding or bonding.

Further, the first conductive portion 121 has a plurality of first conductive portions 1210 arranged at intervals side by side, and the second conductive portion 122 has a plurality of second conductive portions 1220 arranged at intervals side by side, and the portion between the adjacent second conductive portions 1220 is hollow, so that the bracket 11 wraps the main body portion 120 and exposes the first conductive portions 1210 and the second conductive portions 1220.

Referring to fig. 2, the first conductive portion 121 has a plurality of first conductive sub-portions 1210 disposed at intervals, the plurality of first conductive sub-portions 1210 are in a strip-shaped sheet structure, the adjacent first conductive portions 1210 are disposed at intervals, portions between the adjacent first conductive portions 1210 are hollowed out, and the whole first conductive portion 121 is in a comb-shaped structure. The second conductive portions 122 have a plurality of second conductive portions 1220 that are disposed at intervals, the plurality of second conductive portions 1220 are in a strip-shaped flat sheet structure, the adjacent second conductive portions 1220 are disposed at intervals, portions between the adjacent second conductive portions 1210 are hollowed out, and the whole second conductive portions 122 are also in a comb-shaped structure.

Referring to fig. 1, a plurality of first hollow portions 111 and second hollow portions 112 are formed on the support 11, the first hollow portions 111 and the second hollow portions 112 penetrate through the support 11 in a third direction Z (i.e. a Z-axis direction in fig. 1), the first hollow portions 111 and the second hollow portions 112 are arranged adjacent to each other at intervals, the first hollow portions 111 expose opposite side surfaces of the first conductive sub-portions 1210, the second hollow portions 112 expose opposite side surfaces of the second conductive sub-portions 1220, and the support 11 wraps the opposite side surfaces of the main body portion 120, so that short circuits caused by bus contact of adjacent cells can be prevented.

In one embodiment, the first hollow portion 111 is circular, and the size of the first hollow portion 111 is matched with the size of the positive electrode of the battery core, so that the positive electrode of the battery core can just pass through the first hollow portion 111, a certain limiting effect can be achieved on the positive electrode of the battery core, assembly is convenient, positioning accuracy of the first conductive portion 121 and the positive electrode of the battery core is improved, and stability of electric connection between the first conductive portion 121 and the positive electrode of the battery core is guaranteed.

In one embodiment, the second hollow portion 112 is in a fan shape, the size of the second hollow portion 112 is matched with the size of the negative electrode of the battery cell, so that the alignment precision of the second conductive portion 122 and the negative electrode of the battery cell can be improved, a certain space can be saved, and the negative electrode can be fully contacted with the second conductive portion 122 exposed by the second hollow portion 112, so that the stability of electrical connection between the negative electrode and the second conductive portion 122 is ensured.

It should be noted that, the first conductive portion and the second conductive portion of the busbar in the related art are all in a complete sheet structure, the first conductive portion and the second conductive portion are relatively rigid, and cannot be easily deformed, and it is difficult to press the first conductive portion and the second conductive portion to be in close contact with the electrode of the battery cell during welding. Taking the first conductive portion 121 as an example, in the embodiment of the utility model, the first conductive portion 121 is divided into a plurality of first conductive portions 1210 with strip-shaped sheet structures, the rigidity of the plurality of first conductive portions 1210 is far smaller than that of the first conductive portions with complete sheet structures in the related art, so that the deformation capability of the first conductive portions 121 can be improved, meanwhile, since the opposite side surfaces of the main body portion 120 are wrapped by the support 11, the main body portion 120 can be supported by the support 11, the support 11 also wraps one end of the first conductive portions 1210 close to the main body portion 120, so as to fix one end of the first conductive portions 1210 close to the main body portion 120, the first hollowed-out portions 111 expose one end of the first conductive portions 1210 far away from the main body portion 120, the lower portion of the first conductive portions 1210 is suspended, and gaps exist between the first conductive portions 1210 and the positive poles of the battery cells, and the first conductive portions 1210 can form a cantilever-like structure, so that the first conductive portions 1210 can be easily pressed and deformed to be tightly attached to the electrodes of the battery cells in the welding process, and the problem of poor welding between the bus bars and the battery cells can be solved.

Similarly, in the embodiment of the present utility model, the rigidity of the second conductive portion 122 is far less than that of the second conductive portion with a complete sheet structure in the related art by dividing the second conductive portion 122 into a plurality of second conductive portions 1220 with a strip-shaped sheet structure, so that the deformation capability of the second conductive portion 122 can be improved, meanwhile, since the opposite side surfaces of the main body portion 120 are wrapped by the bracket 11, the main body portion 120 can be supported by the bracket 11, the bracket 11 also wraps one end of the second conductive portion 1220 near the main body portion 120, so as to fix one end of the second conductive portion 1220 near the main body portion 120, the second hollowed-out portion 112 exposes one end of the second conductive portion 1220 far away from the main body portion 120, and a gap exists between the lower portion of the second conductive portion 1220 and the positive electrode of the battery cell.

Further, the bus bar 12 has at least two main body parts 120, and a first conductive part 121 and a second conductive part 122 are connected to opposite ends of each main body part 120. In the first direction Y, adjacent main body portions 120 are spaced apart from each other and are offset from each other. Under this structure, the battery core after the connection misplaces in turn, with a plurality of battery cores dislocation arrangement that same busbar unit 1 corresponds, makes a plurality of battery cores can splice closely together to make full use of battery module's inner space improves battery module's energy density.

In other embodiments, the plurality of main portions 120 in the same bus bar 12 may be arranged side by side along a straight line, so that the connected cell groups are arranged in a matrix.

Further, the busbar 12 has at least one connecting portion 13, the connecting portion 13 is disposed between two adjacent main portions 120 in the same busbar 12, and the connecting portion 13 is connected to the two main portions 120 respectively and disposed at an angle with respect to the adjacent main portions 120.

In one embodiment, as shown in fig. 1 and 2, each busbar 12 has two adjacent body portions 120 disposed at intervals along the first direction Y, the two body portions 120 are arranged in a staggered manner, and the two body portions 120 are connected by the connecting portion 13. The extending direction of the connecting portion 13 intersects the first direction Y and the second direction X. The angle between the connecting portion 13 and the adjacent main body portion 120 may be an acute angle or an obtuse angle. For example, the included angle between the connecting portion 13 and the adjacent main body portion 120 is, but not limited to, 30 degrees, 60 degrees, 120 degrees, 150 degrees, or the like.

In one embodiment, the two main body portions 120 and the connecting portion 13 disposed in the same bus bar 12 and adjacent to each other at intervals along the first direction Y are integrally formed, and may be formed by stamping or other processes. In other embodiments, two main body portions 120 disposed adjacent to each other in the first direction Y and the connecting portion 13 therebetween in the same busbar 12 may be a split structure, and the components may be connected by welding or bonding.

In practical use, the number of the main body portions 120 arranged in the first direction Y in each busbar 12 is the same as the number of the cells arranged in the first direction Y. The number of the main body portions 120 provided in the first direction Y in each busbar 12 may not be limited to 2 in the above-described embodiment, but may be 1 or 3 or more.

Further, there is a height difference between the first conductive part 121 and the second conductive part 122.

In one embodiment, as shown in fig. 3, the first conductive portion 121 is in the same plane as the main body portion 120, and the second conductive portion 122 is recessed in one side surface of the main body portion 120 and protrudes from the opposite side surface of the main body portion 120. Since the positive electrode and the negative electrode of the battery cell have a certain height difference, in order to match with the structure of the battery cell, the first conductive part 121 and the main body part 120 are positioned on the same plane, and the second conductive part 122 and the main body part 120 are arranged in a stepped shape, so that the connection between the bus bar and the battery cell is facilitated.

In one embodiment, as shown in fig. 1, the integrated busbar 100 has one busbar unit 1.

In one embodiment, the integrated busbar 100 comprises at least two busbar units 1 and a plurality of connectors 2, each connector 2 being electrically connected to a busbar 12 on an adjacent two busbar units 1.

As shown in fig. 5 to 7, the integrated busbar 100 has 4 busbar units 1, the 4 busbar units 1 are arranged side by side along the first direction Y, a plurality of connectors 2 are provided between any adjacent two busbar units 1, and the connectors 2 are used for electrically connecting the busbars 12 on the adjacent two busbar units 1.

In practical applications, the number of the busbar units 1 in the integrated busbar 100 may be set according to the size of the battery module, the number of the battery cells, and the like, and is not limited to 1 or 4 in the above embodiments, but may be 2 or more. When the battery module is large, the connecting piece 2 can be used for splicing the busbar units 1, so that the integrated busbar provided by the embodiment of the utility model can be compatible with the battery modules with different sizes.

In one embodiment, the connector 2 is welded to the busbar 12. Adopt welded connection's mode to be connected connecting piece 2 and busbar 12, can improve connecting piece 2 and busbar 12's joint strength, avoid connecting piece 2 and busbar 12 to take place not hard up or break away from, guarantee the stability and the security of integrated busbar.

In one embodiment, the busbar 12 further has a welding portion 123 connected to the main body portion 120, the welding portion 123 protrudes from an edge of the main body portion 120 along the first direction Y, the welding portion 123 is integrally formed with the main body portion 120, and the welding portion 123 is welded to the connecting member 2.

The portion of the welding portion 123 connected with the connecting piece 2 is formed with a through hole 1230, the bracket 11 is provided with a third hollow portion 113, the third hollow portion 113 is adjacent to the first hollow portion 111 and the second hollow portion 112 and is arranged at intervals, the welding portion 123 and the through hole 1230 are exposed out of the third hollow portion 113, the through hole 1230 on the welding portion 123 can be used as a positioning hole, and the positioning and fixing functions can be achieved when the busbar 12 is installed. The part of the connection piece 2 that is connected to the busbar 12 can also be provided with a through-hole, which can also be positioned and fixed during the installation of the connection piece 2.

In one of the embodiments, the connector 2 is sheet-like. Specifically, the connecting piece 2 is a planar sheet structure, and the planar sheet structure can reduce the weight of the integrated busbar on one hand, and can reduce the space occupied by the integrated busbar in the battery module on the other hand, thereby being beneficial to improving the energy density of the battery module.

Further, the busbar unit 1 further includes an output busbar 14 and an input busbar 15, the output busbar 14 includes a third conductive portion 141, the third conductive portion 141 has a plurality of third conductive portions 1410 arranged in parallel at intervals, a portion between adjacent third conductive portions 1410 is hollowed out, the third conductive portions 1410 are electrically connected with an anode of a battery cell of an output end of the battery module, and the support wraps the output busbar 14 and exposes the third conductive portions 1410.

The input busbar 15 includes a fourth conductive portion 151, the fourth conductive portion 151 has a plurality of fourth conductive portions 1510 arranged side by side at intervals, a portion between adjacent fourth conductive portions 1510 is hollowed out, the fourth conductive portions 1510 are electrically connected with a negative electrode of a battery cell of an input end of the battery module, and the bracket wraps the input busbar 15 and exposes the fourth conductive portions 1510.

In one embodiment, as shown in fig. 7 and 8, fig. 8 is a schematic structural diagram of an output bus bar and an input bus bar according to an embodiment of the present utility model, the output bus bar 14 includes an output bus bar main body 140 and two third conductive portions 141 disposed at intervals along the first direction Y, the third conductive portions 141 are located on the same side of the output bus bar main body 140 and connected to the output bus bar main body 140, and the two third conductive portions 141 are electrically connected to the positive electrodes of the first cells in the two rows of cells arranged along the second direction X, respectively. The third conductive portion 141 is in the same plane as the output bus body 140.

The third conductive part 141 is divided into a plurality of third conductive parts 1410 arranged at intervals side by side, and parts between adjacent third conductive parts 1410 are hollowed out, the support 11 wraps the output bus bar main body 140 and one end of the third conductive part 1410 close to the output bus bar main body 140 so as to fix one end of the third conductive part 1410 close to the output bus bar main body 140, one end of the third conductive part 1410 far away from the output bus bar main body 140 is exposed out of the first hollowed-out part 111, the lower part of the third conductive part 1410 is suspended, a gap exists between the third conductive part 1410 and the positive electrode of the battery cell, and the third conductive part 1410 forms a cantilever-like structure so that the third conductive part 1410 can be easily pressed and deformed to be clung to the electrode of the battery cell in the welding process, thereby the problem of poor welding between the bus bar and the battery cell can be solved.

The input bus 15 includes an input bus body 150 and two fourth conductive portions 151 disposed at intervals along the first direction Y, the fourth conductive portions 151 being located at the same side of the input bus body 150 and connected to the input bus body 150, the two fourth conductive portions 151 being electrically connected to anodes of last cells of the two rows of cells arranged along the second direction X, respectively, the fourth conductive portions 151 and the input bus body 150 having a height difference therebetween, the fourth conductive portions 151 and the input bus body 150 forming a stepped structure to match the height difference between the input bus 15 and the cells.

Through dividing the fourth conductive part 151 into a plurality of fourth conductive parts 1510 which are arranged at intervals side by side, and hollowing out the parts between the adjacent fourth conductive parts 1510, the support 11 wraps the input bus main body 150 and one end of the fourth conductive part 1510 close to the input bus main body 150 so as to fix one end of the fourth conductive part 1510 close to the input bus main body 150, the second hollow part 112 exposes one end of the fourth conductive part 1510 far away from the input bus main body 150, the lower part of the fourth conductive part 1510 is suspended, a gap exists between the fourth conductive part 1510 and the positive electrode of the battery cell, and the fourth conductive part 1510 forms a cantilever-like structure so that the fourth conductive part 1510 can be easily pressed and deformed to be clung to the electrode of the battery cell in the welding process, thereby solving the problem of poor welding between the bus and the battery cell.

Further, as shown in fig. 5 to 7, the integrated busbar 100 further includes a plurality of output connectors 16 and a plurality of input connectors 17, the output connectors 16 are electrically connected to the output buses 14 of the adjacent two busbar units, respectively, and the input connectors 17 are electrically connected to the input buses 15 of the adjacent two busbar units, respectively.

Specifically, the output connector 16 and the output bus bar 14 may be fixedly connected by welding, and the input connector 17 and the input bus bar 15 may be fixedly connected by welding.

In one embodiment, both the output connector 16 and the input connector 17 are planar sheet-like structures.

The embodiment of the utility model also provides a battery module which comprises a plurality of electric cores arranged side by side and the integrated busbar provided by any embodiment, wherein the integrated busbar is used for electrically connecting the electric cores.

The utility model has the beneficial effects that: in the utility model, the integrated busbar comprises at least one busbar unit, the busbar unit comprises a bracket and a plurality of busbars, the busbars are positioned in the bracket, the busbars comprise a main body part, a first conductive part and a second conductive part, the first conductive part is arranged at one end of the main body part and is connected with the main body part, the first conductive part is used for being electrically connected with the positive electrode of the battery core, the second conductive part is arranged at the opposite end of the main body part and is connected with the main body part, the second conductive part is used for being electrically connected with the negative electrode of the adjacent other battery core, the first conductive part is divided into a plurality of first conductive parts which are arranged at intervals, the second conductive part is divided into a plurality of second conductive parts which are arranged at intervals, and the parts between the adjacent second conductive parts are hollowed out, so that the deformability of the first conductive parts and the second conductive parts is better than that of the first conductive parts and the second conductive parts before being hollowed out, and the deformability of the first conductive parts and the second conductive parts is improved, and the deformability of the first conductive parts and the second conductive parts are convenient to be tightly adhered to the first conductive parts and the second conductive parts when the first conductive parts and the second conductive parts are not hollowed out, and the second conductive parts are welded tightly, so that the problem of the busbar can be solved.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A bus bar, comprising:

a main body portion;

2. The bus bar of claim 1 wherein the first conductive portion and the second conductive portion have a height differential therebetween.

3. The bus bar of claim 2 wherein the first conductive portion is coplanar with the main body portion and the second conductive portion is recessed from one side surface of the main body portion and protrudes from an opposite side surface of the main body portion.

4. The bus bar of claim 1, wherein the bus bar has at least two main body portions, opposite ends of each of the main body portions being connected to the first conductive portion and the second conductive portion, respectively;

5. The bus bar of claim 4 comprising at least one connecting portion disposed between and connected to adjacent two of the body portions, the connecting portion disposed at an angle to the adjacent body portions.

6. An integrated busbar comprising at least one busbar unit, the busbar unit comprising:

a bracket; and

the plurality of bus bars of any one of claims 1 to 5, the bracket wrapping the main body portion and exposing the first and second conductive sub-portions.

7. The integrated busbar of claim 6, wherein the bracket has a plurality of first hollowed-out portions and a plurality of second hollowed-out portions, the first hollowed-out portions being adjacent to and spaced apart from the second hollowed-out portions;

8. The integrated busbar of claim 6, wherein the integrated busbar includes at least two of the busbar units and a plurality of connectors, each of the connectors being electrically connected to the busbars on adjacent two of the busbar units.

9. The integrated busbar of claim 8 wherein the connector is welded to the busbar.

10. The integrated busbar of claim 9, wherein the busbar includes a welded portion connected to the main body portion, the welded portion is welded to the connecting member, a through hole is formed in a portion of the welded portion connected to the connecting member, and the bracket exposes the welded portion and the through hole.

11. The integrated busbar of any of claims 6 to 10, wherein the busbar unit further comprises:

12. The integrated busbar of any of claims 6 to 10, wherein the busbar is integrally injection molded with the bracket.

13. A battery module comprising a plurality of cells arranged side by side and an integrated busbar according to any one of claims 6 to 12 for electrically connecting a plurality of the cells.