US-12626983-B2 - Battery pack and assembly method of battery pack

US12626983B2US 12626983 B2US12626983 B2US 12626983B2US-12626983-B2

Abstract

Provided are a battery pack and a method for assembling the battery pack. The battery pack includes a battery string and a busbar support. The battery string includes a plurality of batteries arranged along a first direction. Surface of the battery perpendicular to the first direction is provided with a pole assembly. The busbar support is arranged on a surface of the battery parallel to the first direction. The busbar support includes a main body portion and a protection portion. The main body portion is configured for setting the busbar. The protection portion is connected to one side of the main body portion. The protection portion is located on one side of the pole assembly facing away from the battery along the first direction.

Inventors

Junshan Guan
Liangjie Gu
Dong Zhao
Zhijuan Cao

Assignees

CALB CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220927
Priority Date: 20220808

Claims (20)

1 . A battery pack, comprising a battery string and a busbar support, wherein the battery string comprises a plurality of batteries arranged along a first direction, a surface of each of the batteries perpendicular to the first direction is provided with a pole assembly, the busbar support is arranged on a surface of each of the batteries parallel to the first direction; the busbar support comprises a main body portion and a protection portion, the main body portion is configured for setting a busbar, the protection portion is connected to one side of the main body portion, the protection portion is located on one side of the pole assembly facing away from each of the batteries-along the first direction, so as to provide protection for the pole assembly, wherein a recessed region is formed on the surface of the battery string parallel to the first direction, and the recessed region is located between two batteries of the batteries adjacent to each other, and the pole assembly of one battery of the batteries is located in the recessed region; wherein the protection portion is accommodated in the recessed region between adjacent batteries and located between the pole assembly of the one battery and another battery of the batteries adjacent to the one battery.
2 . The battery pack according to claim 1 , wherein the surface of each of the batteries perpendicular to the first direction is a first surface, and the protection portion is located between the two first surfaces of two batteries of the batteries adjacent to each other and the two first surfaces facing each other.
3 . The battery pack according to claim 1 , wherein the pole assembly has a first portion and a second portion, the first portion is disposed on the surface of each of the batteries perpendicular to the first direction and is configured for connecting with a tab of each of the batteries, the second portion is connected to the first portion and extends along the first direction for connecting the busbar; wherein the protection portion is at least located on one side of the second portion facing away from each of the batteries along the first direction, so as to provide protection for the second portion.
4 . The battery pack according to claim 1 , wherein the busbar support is provided with a groove, and the groove is jointly formed by the main body portion and the protection portion, the groove is configured to accommodate the pole assembly and a connection portion of the busbar, and a size of the groove is larger than a size of the pole assembly.
5 . The battery pack according to claim 4 , wherein a notch of the groove is opened toward the pole assembly along the first direction, so that the pole assembly is able to enter the groove through the notch.
6 . The battery pack according to claim 5 , wherein the groove has a first groove wall and a second groove wall spaced apart along a second direction, and the second direction is perpendicular to the first direction, the first groove wall is located on a surface of the main body portion facing the battery, and the second groove wall is located on the protection portion, the second groove wall is provided with a first elastic member extending toward the first groove wall, and the pole assembly is sandwiched between the first elastic member and the first groove wall, and the first elastic member is configured for providing an elastic preload force to the pole assembly.
7 . The battery pack according to claim 6 , wherein an upper side and/or a lower side of the first elastic member is provided with a guiding structure, the guiding structure is an inclined surface structure and configured for guiding the pole assembly when the battery pack and the busbar support move up and down relative to each other so that the pole assembly enters the groove.
8 . The battery pack according to claim 6 , wherein the second groove wall is provided with at least two first elastic members, and the at least two first elastic members are arranged at intervals.
9 . The battery pack according to claim 6 , wherein the first elastic member is a spring or an elastic sheet.
10 . The battery pack according to claim 6 , wherein the first elastic member and the protection portion are integrally formed.
11 . The battery pack according to claim 6 , wherein the pole assembly is provided with a position-limiting member, which is configured to limit a position of the first elastic member.
12 . The battery pack according to claim 6 , wherein an insulating adhesive layer is disposed on a surface of the pole assembly, and the insulating adhesive layer has an opening corresponding to a position of the first elastic member is configured for accommodating the first elastic member.
13 . The battery pack according to claim 6 , wherein an insulating adhesive layer is provided on a surface of the pole assembly, and the insulating adhesive layer is provided with a position-limiting member, the position-limiting member is configured to limit a position of the first elastic member.
14 . The battery pack according to claim 6 , wherein the first groove wall is provided with a positioning groove, and the positioning groove is configured to accommodate and fasten a part of a structure of the pole assembly.
15 . A method for assembling the battery pack of claim 14 , comprising: using a tool to fix the plurality of batteries into the battery string; loading the busbar support from top to bottom relative to the battery string, and the pole assembly of the battery is at least partially accommodated in the groove, and then the busbar support is pushed toward the battery string, so that a part of a structure of the pole assembly is engaged in the positioning groove.
16 . The battery pack according to claim 4 , wherein a lower end of the groove facing a groove wall of the main body portion is provided with a first protrusion, the first protrusion is spaced apart from the main body portion along a second direction perpendicular to the first direction; wherein when the busbar support is arranged on a lateral surface of the battery, a lower end of the pole assembly is engaged between the first protrusion and the main body portion.
17 . The battery pack according to claim 16 , wherein: an upper end of one side of the first protrusion facing the main body portion is provided with a chamfer structure; and/or the main body portion is provided with a second protrusion protruding toward the first protrusion, the first protrusion is arranged at intervals from the second protrusion; wherein when the busbar support is arranged on the lateral surface of the battery, a lower end of the pole assembly is engaged between the first protrusion and the second protrusion.
18 . A method for assembling the battery pack of claim 17 , comprising: fixing the busbar support with a tool; placing the battery from top to bottom, so that a lower end of the pole assembly of the battery is engaged between the first protrusion and the main body portion.
19 . A method for assembling the battery pack of claim 16 , comprising: fixing the busbar support with a tool; placing the battery from top to bottom, so that a lower end of the pole assembly of the battery is engaged between the first protrusion and the main body portion.
20 . The battery pack according to claim 4 , wherein the main body portion is frame-shaped and has an opening, and a position-limiting plate is disposed in the opening, the position-limiting plate occupies a part of a space of the opening, and a part of the opening not occupied by the position-limiting plate forms a through hole, and the through hole communicates with the groove; wherein when the busbar is disposed on the busbar support, a main body of the busbar is located on one side of the position-limiting plate facing away from the protection portion, the connection portion passes through the through hole and is connected to the pole assembly accommodated in the groove.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of China application serial no. 202210946274.4, filed on Aug. 8, 2022. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. BACKGROUND Technical Field The present disclosure relates to the technical field of batteries, in particular to a battery pack and an assembly method for the battery pack. Description of Related Art For welding the busbar of the existing battery pack and the pole assembly of the battery, it is necessary to ensure the precise assembly positioning between the two. In the related art, supports are normally arranged on the lateral surface of the battery for the busbar to be arranged, so as to ensure assembly positioning between the busbar and the pole assembly. However, the pole assembly, as a component disposed on the surface of the battery, is very likely to be damaged by collision and squeezing of other structures during assembly or use, and the supports for existing busbar cannot provide protection for the pole assembly. SUMMARY In an aspect of the present disclosure, a battery pack is provided, which includes a battery string and a busbar support. The battery string includes a plurality of batteries arranged along a first direction. A surface of the battery perpendicular to the first direction is provided with a pole assembly. The busbar support is arranged on a surface of the battery parallel to the first direction. The busbar support includes a main body portion and a protection portion. The main body portion is configured for setting the busbar. The protection portion is connected to one side of the main body portion. The protection portion is located on one side of the pole assembly facing away from the battery along the first direction, so as to provide protection for the pole assembly. In another aspect of the present disclosure, an assembly method for a battery pack is provided, which is used for assembling a battery and the busbar support provided by the present disclosure, including: fixing the busbar support with a tool; placing the battery from top to bottom, so that the lower end of the pole assembly of the battery is engaged between the first protrusion and the main body portion. In yet another aspect of the present disclosure, an assembly method for a battery pack is provided, which is used for assembling the battery and the busbar support provided by the present disclosure, including: fixing the plurality of batteries into the battery string by using a tool; arranging the busbar to the lateral surface of the battery string. BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the disclosure, reference may be made to exemplary embodiments shown in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted, or in some instances proportions may have been exaggerated, so as to emphasize and clearly illustrate the features described herein. In addition, related elements or components can be variously arranged, as known in the art. Further, in the drawings, like reference numerals designate same or like parts throughout the several views. FIG. 1 is a perspective structural view of a busbar support of a battery pack according to an exemplary embodiment. FIG. 2 is a perspective structural view of the busbar shown in FIG. 1 from another angle. FIG. 3 is a top view of the busbar support shown in FIG. 1. FIG. 4 is a perspective structural view of a busbar support of a battery pack according to another exemplary embodiment. FIG. 5 is a partial top view of the busbar support shown in FIG. 4. FIG. 6 is a perspective structural view of a battery pack according to an exemplary embodiment. FIG. 7 is a partial top view of the battery pack shown in FIG. 6. FIG. 8 is a partial perspective exploded view of the battery pack shown in FIG. 6. FIG. 9 is a partial structural view of FIG. 8. FIG. 10 is a partial perspective structural view of the battery pack shown in FIG. 6 from another angle. FIG. 11 is a perspective structural view of a battery pack according to another exemplary embodiment. FIG. 12 is a partial top view of the battery pack shown in FIG. 11. FIG. 13 is a partial perspective exploded view of the battery pack shown in FIG. 11. FIG. 14 is a partial structural view of FIG. 13. FIG. 15 is a partial top view of a battery pack shown in another exemplary embodiment. FIG. 16 is a perspective structural view of the busbar support of the battery pack shown in FIG. 15. FIG. 17 is a schematic plan view of a busbar support of a battery pack according to another exemplary embodiment. FIG. 18 is a partial top view of a battery pack shown in another exemplary embodiment. FIG. 19 is a schematic perspective view of the busbar support of the battery pack shown in FIG. 18. DESCRIPTION OF THE EMBODIMENTS The technical solutions in the exemplary embodiments of the