Battery module

Patent metadata

Field	Value
Publication number	US-2018248166-A1
Application number	US-201815901298-A
Country	US
Kind code	A1
Filing date	Feb 21, 2018
Priority date	Feb 24, 2017
Publication date	Aug 30, 2018
Grant date	—

Abstract

A battery module comprising a first battery group having at least one secondary battery; a second battery group having at least one secondary battery that does not belong to the first battery group; a first bus bar to which an electrode lead of the secondary battery belonging to the first battery group is contacted and coupled; a second bus bar spaced apart from the first bus bar so that an electrode lead of the secondary battery belonging to the second battery group is contacted and coupled thereto; a sub bus bar interposed between the first bus bar and the second bus bar to electrically connect the first bus bar and the second bus bar; and an elastic member having a portion coupled and fixed to the sub bus bar to give a restoring force for separating the sub bus bar from the first bus bar and the second bus bar.

First claim

What is claimed is:

1 . A battery module, comprising:
a first battery group having at least one secondary battery; a second battery group having at least one secondary battery that does not belong to the first battery group; a first bus bar to which an electrode lead of the secondary battery belonging to the first battery group is contacted and coupled; a second bus bar spaced apart from the first bus bar so that an electrode lead of the secondary battery belonging to the second battery group is contacted and coupled thereto; a sub bus bar interposed between the first bus bar and the second bus bar to electrically connect the first bus bar and the second bus bar, the sub bus bar being respectively joined to the first bus bar and the second bus bar by means of soldering; and an elastic member having a portion coupled and fixed to the sub bus bar to give a restoring force for separating the sub bus bar from the first bus bar and the second bus bar.

2 . The battery module according to claim 1 ,
wherein the elastic member includes a spring.

3 . The battery module according to claim 1 , further comprising:
a frame member at which the first bus bar and the second bus bar are placed and fixed, wherein another portion of the elastic member is coupled and fixed to the frame member.

4 . The battery module according to claim 3 ,
wherein both ends of the elastic member are coupled and fixed to an upper portion of the frame member and a lower portion of the sub bus bar and kept in a compressed state to give a restoring force in an upper direction.

5 . The battery module according to claim 3 ,
wherein the frame member includes a guide rib into which the sub bus bar is at least partially inserted, so that the guide rib guides movement of the sub bus bar in a deviating direction.

6 . The battery module according to claim 5 ,
wherein the guide rib is respectively provided at both ends of the sub bus bar.

7 . The battery module according to claim 1 ,
wherein the sub bus bar is configured to elongate in a direction orthogonal to an arrangement direction of the first bus bar and the second bus bar, and both side surfaces of the sub bus bar are soldered along a length direction.

8 . The battery module according to claim 7 ,
wherein the elastic member is provided in plural along the length direction of the sub bus bar.

9 . The battery module according to claim 1 ,
wherein at least one of the first bus bar and the second bus bar has a groove formed at a portion in contact with the sub bus bar to be concave downwards, so that a soldering material is inserted into the groove.

10 . The battery module according to claim 1 ,
wherein the sub bus bar has a groove formed in a side surface in contact with at least one of the first bus bar and the second bus bar to be concave downwards, so that a soldering material is inserted into the groove.

11 . The battery module according to claim 1 ,
wherein the electrode lead contacted and coupled to the first bus bar and the electrode lead contacted and coupled to the second bus bar have different polarities.

12 . A battery pack, comprising the battery module defined in claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Ryu Jae-Uk
• YOON Ji-Su
• Kang Dal-Mo
• Mun Jeong-O

Classifications

• H01M50/227 Primary

  Organic material · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/522

  Inorganic material · CPC title

• H01M50/507

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title