CN-224217669-U - Battery pack and electricity utilization device

CN224217669UCN 224217669 UCN224217669 UCN 224217669UCN-224217669-U

Abstract

The application discloses a battery pack and an electric device, wherein the battery pack comprises a first direction, the battery pack comprises a box body, a plurality of battery cells, a bus bar and a flexible circuit board, the box body is provided with a containing cavity, the battery cells are arranged in the containing cavity and are arranged along the first direction, the bus bar is arranged in the containing cavity and is electrically connected with at least one battery cell, the flexible circuit board is arranged in the containing cavity and comprises a first body, a connecting part and a connecting sheet, the first body is arranged on one side of the battery cell, which is connected with the bus bar, the connecting part is connected with the first body, the connecting part comprises a first bonding pad and a second bonding pad which are arranged along the first direction, the first bonding pad is electrically connected with the second bonding pad, the connecting sheet is electrically connected with the first bonding pad or the second bonding pad, and one end of the connecting sheet, which is far away from the connecting part, is electrically connected with one bus bar. The application can realize the repeated use of the flexible circuit board and reduce the maintenance difficulty and the maintenance cost of the battery pack.

Inventors

TANG TAO
WANG WEIHU
Zou Tianhua
LEI JINGJING
LIAO ZHIYONG
LI YANGXING

Assignees

欣旺达动力科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250528

Claims (10)

1. A battery pack having a first orientation, comprising: the box body is provided with a containing cavity; the battery cells are arranged in the accommodating cavity and are arranged along the first direction; The busbar is arranged in the accommodating cavity and is electrically connected with at least one battery cell; the flexible circuit board is arranged in the accommodating cavity; the flexible circuit board includes: The first body is arranged on one side of the battery monomer, which is connected with the busbar; The connecting part comprises a first bonding pad and a second bonding pad which are arranged along the first direction, and the first bonding pad is in conductive connection with the second bonding pad; and one end of the connecting piece, which is far away from the connecting part, is in conductive connection with one busbar.
2. The battery pack of claim 1, wherein the flexible circuit board comprises a pickup wire, a portion of the pickup wire is embedded in the first body, another portion of the pickup wire is embedded in the connecting portion, and the pickup wire is electrically connected to the first bonding pad and the second bonding pad, respectively.
3. The battery pack of claim 1, wherein the connecting tab comprises: a second body; The first welding part is connected to one side of the second body close to the connecting part and is in conductive connection with one of the first bonding pad and the second bonding pad; The second welding part is connected to one side of the second body far away from the first welding part and is used for being connected with the busbar; a third welding part connected to a side of the second welding part remote from the second body and used for being connected with the busbar; Wherein the second welded portion is not connected to the busbar when the third welded portion is connected to the busbar; when the second welding part is connected with the busbar, the third welding part is disconnected with the second welding part.
4. The battery pack according to claim 3, wherein the connection piece further includes a weak portion provided between the second welded portion and the third welded portion and connected to the second welded portion and the third welded portion, respectively.
5. The battery pack of claim 4, wherein the connecting tab further has a notch, the second weld, the weakened portion, and the third weld enclosing the notch.
6. The battery pack of claim 5, wherein the connecting tab further has a plurality of the notches, the plurality of notches including a first notch and a second notch, the first notch and the second notch disposed on both sides of the connecting tab along the first direction.
7. The battery pack of claim 4, wherein the weakened portion comprises a plurality of weakened areas spaced apart along the first direction, the weakened areas being grooves or through holes.
8. The battery pack of claim 4, wherein the first weld, the second body, the second weld, the frangible portion, and the third weld are integrally connected.
9. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells, The battery pack includes a plurality of the bus bars; The flexible circuit board comprises a plurality of connecting parts which are arranged at intervals along the first direction and are respectively connected with the first body; The flexible circuit board further comprises a plurality of connecting pieces, each connecting piece is connected with one busbar in a conductive mode, and each connecting piece is connected with a first bonding pad or a second bonding pad of one connecting portion in a conductive mode.
10. An electrical device comprising a battery pack according to any one of claims 1-9.

Description

Battery pack and electricity utilization device Technical Field The application belongs to the technical field of batteries, and particularly relates to a battery pack and an electric device. Background The nickel piece of the flexible circuit board in the battery pack is welded with the busbar connected with the battery cells, so that the connection between the nickel piece and the busbar cannot be detached, and at the moment, when the battery pack fails, the flexible circuit board needs to be removed in a reporting way and replaced by a new flexible circuit board, so that the battery pack is difficult to repair, and the repair cost is high. Disclosure of utility model The embodiment of the utility model provides a battery pack, which aims to solve the problems of difficult repair and high repair cost of the battery pack caused by the fact that the flexible circuit board needs to be scrapped and removed when the conventional battery pack fails. The battery pack provided by the embodiment of the application has a first direction and comprises: the box body is provided with a containing cavity; the battery cells are arranged in the accommodating cavity and are arranged along the first direction; The busbar is arranged in the accommodating cavity and is electrically connected with at least one battery cell; the flexible circuit board is arranged in the accommodating cavity; the flexible circuit board includes: The first body is arranged on one side of the battery monomer, which is connected with the busbar; The connecting part comprises a first bonding pad and a second bonding pad which are arranged along the first direction, and the first bonding pad is in conductive connection with the second bonding pad; and one end of the connecting piece, which is far away from the connecting part, is in conductive connection with one busbar. In some embodiments, the flexible circuit board includes a collection line, a portion of the collection line is embedded in the first body, another portion of the collection line is embedded in the connection portion, and the collection line is electrically connected to the first pad and the second pad respectively. In some embodiments, the connecting tab comprises: a second body; The first welding part is connected to one side of the second body close to the connecting part and is in conductive connection with one of the first bonding pad and the second bonding pad; The second welding part is connected to one side of the second body far away from the first welding part and is used for being connected with the busbar; a third welding part connected to a side of the second welding part remote from the second body and used for being connected with the busbar; Wherein the second welded portion is not connected to the busbar when the third welded portion is connected to the busbar; when the second welding part is connected with the busbar, the third welding part is disconnected with the second welding part. In some embodiments, the connecting piece further comprises a weak portion disposed between the second welded portion and the third welded portion and connected to the second welded portion and the third welded portion, respectively. In some embodiments, the connecting piece further has a notch, the second weld, the weakened portion, and the third weld enclosing the notch. In some embodiments, the connecting piece further has a plurality of the notches, the plurality of notches including a first notch and a second notch, the first notch and the second notch disposed on both sides of the connecting piece along the first direction. In some embodiments, the weak portion includes a plurality of weak areas, and a plurality of the weak areas are spaced apart along the first direction, and the weak areas are grooves or through holes. In some embodiments, the first weld, the second body, the second weld, the frangible portion, and the third weld are integrally connected. In some embodiments of the present invention, in some embodiments, The battery pack includes a plurality of the bus bars; The flexible circuit board comprises a plurality of connecting parts which are arranged at intervals along the first direction and are respectively connected with the first body; The flexible circuit board further comprises a plurality of connecting pieces, each connecting piece is connected with one busbar in a conductive mode, and each connecting piece is connected with a first bonding pad or a second bonding pad of one connecting portion in a conductive mode. Accordingly, an electrical device according to an embodiment of the present application includes a battery pack according to any one of the foregoing embodiments. The battery pack has the beneficial effects that compared with the prior art, the battery pack comprises a first direction, the battery pack comprises a box body, a plurality of battery units, a bus bar and a flexible circuit board, the box body is provided with a containing cavity, the