CN216213936U

CN216213936U - Bus bar and battery module

Info

Publication number: CN216213936U
Application number: CN202122531196.5U
Authority: CN
Inventors: 赵冬
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-04-05
Anticipated expiration: 2031-10-20

Abstract

The utility model provides a bus bar and a battery module, wherein the bus bar is provided with a first surface and a second surface, the middle part of the first surface is sequentially provided with a first concave part, a separation through hole and a second concave part along a first direction, and the length of the first concave part and/or the length of the second concave part is less than that of the separation through hole along a second direction which is vertical to the first direction. According to the bus bar, the first concave part and the second concave part are arranged, so that the connection of the collecting connecting pieces is facilitated, the interference between the bus bar and a large-diameter pole post during assembly is avoided, and the bus bar can be smoothly and electrically connected with a battery; through separating the through-hole and keeping apart first depressed part and second depressed part completely for first depressed part and second depressed part can play the cushioning effect along the electric current direction homoenergetic, have promoted the buffer performance of busbar, and when the electric current transships, the quilt fusing that first depressed part and second depressed part can be very fast has improved the safety in utilization of busbar.

Description

Bus bar and battery module

Technical Field

The present disclosure relates to a battery module, and more particularly to a bus bar and a battery module including the same.

Background

The busbar is connected as the high voltage electricity of battery module, and it is connected with Flexible circuit board (FPC) electricity usually through gathering the connection piece, and gathers the connection piece and connect in the recess of busbar to the realization is to the real-time supervision of battery module voltage, but, when meetting the great battery utmost point post of external diameter, the recess of busbar can produce with battery utmost point post and interfere, leads to the busbar can't be connected with the battery.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a bus bar capable of preventing a groove from interfering with a large battery post.

In order to achieve the above object, the present invention provides a bus bar, which has a first surface and a second surface that are opposite to each other, wherein a first recessed portion, a separation through hole and a second recessed portion are sequentially disposed in a middle portion of the first surface along a first direction, the first recessed portion and the second recessed portion are both communicated with the separation through hole, and along a second direction perpendicular to the first direction, a length of the first recessed portion and/or a length of the second recessed portion is smaller than a length of the separation through hole.

Compared with the prior art, the technical scheme has the following advantages:

according to the bus bar, the first concave part and the second concave part are arranged, and the lengths of the first concave part and the second concave part can be unequal along the current direction, so that the connection of the collecting connecting sheet is facilitated, the collecting connecting sheet can timely and accurately transmit collected information to the flexible circuit board, the interference between the collecting connecting sheet and a pole with a larger outer diameter is avoided, and the bus bar can be smoothly connected with a battery; through separating the through-hole and keeping apart first depressed part and second depressed part completely for first depressed part and second depressed part play the cushioning effect along the electric current direction, have promoted the buffer performance of busbar, and when the electric current transships, by the very fast quilt fusing of first depressed part and the second depressed part of complete separation, have improved the safety in utilization of busbar.

Another object of the present invention is to provide a battery module including the above bus bar.

In order to achieve the above object, the present invention provides a battery module, which includes a battery, a flexible circuit board, a collecting connecting sheet, and the above busbar, wherein the busbar is electrically connected to a pole of the battery, a first end of the collecting connecting sheet is embedded in the first recess and electrically connected to the first recess, and a second end of the collecting connecting sheet is electrically connected to the flexible circuit board.

Compared with the prior art, the technical scheme has the following advantages:

the battery module of the utility model has the bus bar, so the battery module has the advantages of convenient assembly, safe use and reliable detection.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic perspective view of a bus bar according to the present invention;

FIG. 2 is a schematic front view of the bus bar shown in FIG. 1;

FIG. 3 is a schematic bottom view of the bus bar shown in FIG. 2;

fig. 4 is a schematic perspective view of a battery module according to the present invention;

fig. 5 is a schematic view showing a connection relationship between the bus bars, the flexible circuit board and the collecting tab in the battery module shown in fig. 4.

The reference numbers illustrate:

10. a bus bar; 11. a first surface; 111. a first recess; 112. separating the through holes; 113. a second recess; 114. rounding off; 12. a second surface; 121. a first boss portion; 122. a second boss portion; 13. a battery connecting portion; 131. connecting holes;

20. a flexible circuit board;

30. collecting connecting sheets;

40. a pole column;

100. a battery module;

x, a first direction;

y, second direction.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1 to 3, the present invention provides a bus bar 10, which has a first surface 11 and a second surface 12 disposed oppositely, in this embodiment, the first surface 11 is configured to be connected with a flexible circuit board 20 through a collecting connecting sheet 30, the second surface 12 is configured to be adjacent to a battery, a first concave portion 111, a separating through hole 112 and a second concave portion 113 are sequentially disposed along a first direction X in the middle of the first surface 11, the first concave portion 111 and the second concave portion 113 are both concave towards the second surface 12, a first convex portion 121 is formed at a position of the second surface 12 corresponding to the first concave portion 111, a second convex portion 122 is formed at a position of the second surface 12 corresponding to the second concave portion 113, the first concave portion 111 is connected to a first side surface of the bus bar 10, the second concave portion 113 is connected to a second side surface of the bus bar 10, that is, a first notch is formed at a position of the first side surface of the bus bar 10 corresponding to the first concave portion 111, a second notch is formed on the second side surface of the bus bar 10 corresponding to the second recess 113, the first side surface and the second side surface are disposed opposite to each other, the first recess 111 and the second recess 113 are both communicated with the separation through hole 112, and along a second direction Y perpendicular to the first direction X, the length of the first recess 111 and/or the length of the second recess 113 is smaller than the length of the separation through hole 112, that is, the first recess 111 and the second recess 113 are completely separated by the separation through hole 112, so that the first recess 111 and the second recess 113 are disposed at an interval, during the use, the second direction Y is a current direction, and according to the assembly requirement, along the second direction Y, the length of the first recess 111 and the length of the second recess 113 can be properly adjusted, specifically, along the second direction Y, the length of one of the first recess 111 and the second recess 113 is configured to accommodate and electrically connect the collecting tab 30, the length of the other of the first and

second recesses

111, 113 is configured to avoid interference with the pole 40.

According to the bus bar 10, the first concave part 111 and the second concave part 113 are arranged, and the lengths of the first concave part 111 and the second concave part 113 can be adjusted according to actual use requirements, so that the connection of the collecting connecting sheet 30 is facilitated, the collecting connecting sheet 30 can timely and accurately transmit collected information to the flexible circuit board 20, interference between the collecting connecting sheet 30 and the pole 40 with the larger outer diameter is avoided, and the bus bar 10 can be smoothly connected with a battery; first depressed part 111 and second depressed part 113 are completely isolated through separating through-hole 112 for first depressed part 111 and second depressed part 113 play the cushioning effect along the electric current direction, have promoted the buffer performance of busbar 10, and when the electric current transships, by the very fast quilt fusing of first depressed part 111 and second depressed part 113 of complete separation, improved the safety in utilization of busbar 10.

Further, as shown in fig. 2, the partition through-hole 112 is an oblong hole, and the center line of the partition through-hole 112 is disposed along the second direction Y, which is a structure that can ensure that the partition through-hole 112 completely separates the first recess 111 and the second recess 113 without affecting the flow of current.

Of course, the partition through hole 112 may be a rectangular hole, an elliptical hole, or an irregular hole, which will not be described in detail herein.

Further, as shown in fig. 1, the edge of the first recess 111 and the edge of the second recess 113 are both formed with a rounded corner 114, specifically, the cross sections of the first recess 111 and the second recess 113 are both rectangular, and the arrangement of the rounded corner 114 avoids scratching the worker by the edge corner of the first recess 111 and the edge corner of the second recess 113, thereby ensuring the safety of the worker during the assembling operation.

In a specific example of the present embodiment, as shown in fig. 2, a center line of the first recess 111 along the first direction X and a center line of the second recess 113 along the first direction X are located on a same straight line, which is exemplarily a center line of the first surface 11, so as to facilitate the processing and manufacturing of the bus bar 10.

Further, as shown in fig. 2, along the second direction Y, the length of the first recess 111 is greater than that of the second recess 113, a collecting connection area is arranged in the first recess 111, and the collecting connection sheet 30 can be arranged in the first recess 111 and welded to the collecting connection area, so that the mounting requirement of the collecting connection sheet 30 is met, and the interference between the collecting connection sheet and the battery post 40 with a larger outer diameter is effectively avoided.

Further, as shown in fig. 2, two battery connection portions 13 are disposed on the bus bar 10, the two battery connection portions 13 are respectively located at two sides of the second recessed portion 113, connection holes 131 for connecting with the posts 40 are respectively disposed on the battery connection portions 13, and the posts 40 can be connected with the connection holes 131 in a clamping, bonding or welding manner.

Still further, in order to make the layout of the bus bar 10 more reasonable, the length of the first recess 111 is smaller than the length of the second recess 113 along the first direction X to ensure that the battery connecting portion 13 has a sufficient area to connect the pole 40, considering that the battery connecting portion 13 needs a larger size when the outer diameter of the pole 40 is excessively large.

Still further, the two battery connecting parts 13 are symmetrically disposed at both sides of the second recess 113, so as to facilitate the manufacturing of the bus bar 10, and at the same time, to facilitate the assembly between the battery connecting parts 13 and the poles 40.

Example two

As shown in fig. 4 and 5, the present invention further provides a battery module 100, which includes a battery, a flexible circuit board 20, a collecting connecting sheet 30 and the bus bar 10, wherein the bus bar 10 is electrically connected to a terminal 40 of the battery, specifically, the terminal 40 is electrically connected to a battery connecting portion 13 of the bus bar 10, and since the bus bar 10 is provided with a first recessed portion 111 and a second recessed portion 113, the terminal 40 does not interfere with the bus bar 10, a first end of the collecting connecting sheet 30 is embedded in the first recessed portion 111 and electrically connected to the first recessed portion 111, a second end of the collecting connecting sheet 30 is electrically connected to the flexible circuit board 20, specifically, the first end of the collecting connecting sheet 30 is welded to a collecting connecting region in the first recessed portion 111, the second end of the collecting connecting sheet 30 is welded to the flexible circuit board 20, voltage information on the bus bar 10 is transmitted to the flexible circuit board 20 through the collecting connecting sheet 30, the voltage of the battery module 100 can be monitored in real time through the flexible circuit board 20.

The battery module 100 of the present invention has the bus bar 10, and therefore, the battery module 100 has the advantages of convenient assembly, safe use and reliable detection.

In summary, the bus bar of the utility model has the advantages that the first concave part and the second concave part are arranged, and the lengths of the first concave part and the second concave part can be unequal along the current direction, so that the connection of the collecting connecting sheet is facilitated, the collecting connecting sheet can timely and accurately transmit the collected information to the flexible circuit board, and the interference between the collecting connecting sheet and the battery pole with larger outer diameter is avoided, so that the bus bar can be smoothly connected with the battery;

according to the bus bar, the first sunken part and the second sunken part are completely isolated through the separating through hole, so that the first sunken part and the second sunken part play a role in buffering along a current direction, the buffering performance of the bus bar is improved, and when the current is overloaded, the completely separated first sunken part and the completely separated second sunken part can be quickly fused, so that the use safety of the bus bar is improved;

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on an operation state of the present application, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims

1. The bus bar is characterized by comprising a first surface and a second surface which are oppositely arranged, wherein a first depressed part, a separation through hole and a second depressed part are sequentially arranged in the middle of the first surface along a first direction, the first depressed part and the second depressed part are communicated with the separation through hole, and along a second direction which is perpendicular to the first direction, the length of the first depressed part and/or the length of the second depressed part is smaller than the length of the separation through hole.

2. The busbar according to claim 1, wherein a center line of the first recess in the first direction and a center line of the second recess in the first direction are located on the same straight line.

3. The buss bar of claim 2, wherein a length of the first depression is greater than a length of the second depression along the second direction, wherein a collection attachment area is disposed within the first depression.

4. The busbar according to claim 3, wherein two battery connecting portions are provided on the busbar, the two battery connecting portions being located on both sides of the second recessed portion, respectively.

5. The buss bar of claim 4, wherein a length of the first depression is less than a length of the second depression along the first direction.

6. The busbar according to claim 4, wherein two of the battery connecting portions are symmetrically disposed on both sides of the second recess portion.

7. The buss bar of claim 1, wherein the dividing through-hole is an oblong hole.

8. The buss bar of claim 1, wherein an edge of the first depression and an edge of the second depression are each formed with a rounded corner.

9. A battery module, characterized in that, the battery module includes battery, flexible circuit board, gathers connection piece and the busbar of any one of claims 1-8, the busbar is connected with the utmost point post electricity of battery, gather the first end of connection piece and inlay and locate in the first depressed part and with the first depressed part electricity is connected, gather the second end of connection piece and with flexible circuit board electricity is connected.