Battery pack

Patent metadata

Field	Value
Publication number	US-11901587-B2
Application number	US-202117318551-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	May 13, 2020
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A battery pack includes a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, and a connector detachably connected to the input/output terminal, and the input/output terminal includes a first hollow conductive member protruding in a first direction and a second hollow conductive member protruding to surround an outer periphery of the first hollow conductive member, the connector includes a central guide protruding in a second direction opposite to the first direction and a third hollow conductive member protruding to surround the outer periphery of the central guide, the central guide is fitted into a hollow portion of the first hollow conductive member, and the third hollow conductive member is fitted into a space between the first and second hollow conductive members and is electrically connected to the first and second hollow conductive members by an elastic connection member.

First claim

What is claimed is:

1. A battery pack comprising a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, a connector detachably connected to the input/output terminal; and an elastic connection member arranged between the input/output terminal and the connector, wherein
the input/output terminal comprises a base portion, a first hollow conductive member protruding from the base portion in a first direction, and a second hollow conductive member protruding from the base portion to surround an outer periphery of the first hollow conductive member,
the connector comprises a central guide protruding in a second direction opposite to the first direction, and a third hollow conductive member protruding to surround an outer periphery of the central guide,
the central guide is fitted into a hollow portion of the first hollow conductive member, and
the third hollow conductive member is fitted into a space between the first and second hollow conductive members and is electrically connected to the first and second hollow conductive members by the elastic connection member arranged in the space between the first and second hollow conductive members such that the elastic connection member contacts each of an outer circumferential surface of the first hollow conductive member and an inner circumferential surface of the third hollow conductive member and further contacts each of an inner circumferential surface of the second hollow conductive member and an outer circumferential surface of the third hollow conductive member.

2. A battery pack comprising a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, and a connector detachably connected to the input/output terminal, wherein
the input/output terminal comprises a first hollow conductive member protruding in a first direction and a second hollow conductive member protruding to surround an outer periphery of the first hollow conductive member,
the connector comprises a central guide protruding in a second direction opposite to the first direction, and a third hollow conductive member protruding to surround an outer periphery of the central guide,
the central guide is fitted into a hollow portion of the first hollow conductive member,
the third hollow conductive member is fitted into a space between the first and second hollow conductive members and is electrically connected to the first and second hollow conductive members by an elastic connection member arranged in the space, and
the elastic connection member comprises a disk member and an inner ring elastic piece and an outer ring elastic piece protruding from an inner ring and an outer ring of the disk member, respectively, in the first direction.

3. The battery pack of claim 2 , wherein
the inner ring elastic piece comes into contact with an outer circumference of the first hollow conductive member and an inner circumference of the third hollow conductive member, and
the outer ring elastic piece comes into contact with an outer circumference of the third hollow conductive member and an inner circumference of the second hollow conductive member.

4. The battery pack of claim 3 , wherein elastic contact portions are bent so as to protrude toward the outer circumference of the first hollow conductive member or the inner circumference of the third hollow conductive member in a longitudinal direction of the inner ring elastic piece.

5. The battery pack of claim 3 , wherein elastic contact portions are bent so as to protrude toward the outer circumference of the third hollow conductive member or the inner circumference of the second hollow conductive member in a longitudinal direction of the outer ring elastic piece.

6. The battery pack of claim 2 , wherein the disk member comprises a connection piece between the inner ring and the outer ring of the disk member so as to connect therebetween.

7. The battery pack of claim 6 , wherein the connection piece comes into contact with a longitudinal cross-section of the third hollow conductive member in the second direction.

8. The battery pack of claim 6 , wherein the connection piece comprises an elastic contact portion having a protruding shape between the inner ring and the outer ring of the disk member.

9. The battery pack of claim 6 , wherein the inner ring elastic piece, the outer ring elastic piece, and the connection piece of the elastic connection member are integrally formed as a strip member.

10. The battery pack of claim 9 , wherein, while consecutively surrounding the inner ring and the outer ring arranged in a concentric circular shape, the strip member forms the connection piece between the inner ring and the outer ring, the inner ring elastic piece that is bent to surround the inner ring from the connection piece and protrudes in the first direction, and the outer ring elastic piece that is bent to surround the outer ring from the connection piece and protrudes in the first direction.

11. The battery pack of claim 2 , wherein a cutting portion is formed at a position in a circumferential direction of the disk member.

12. The battery pack of claim 1 , wherein an insulating protective cap is arranged at an end portion of the central guide in the second direction.

13. The battery pack of claim 12 , wherein the end portion of the central guide or an end of the protective cap protrudes further than an end portion of the third hollow conductive member in the second direction.

14. The battery pack of claim 1 , wherein, in the connector and the input/output terminal approaching each other in the first and second directions relative to each other, after the central guide of the connector is fitted into the hollow portion of the first hollow conductive member of the input/output terminal, the third hollow conductive member of the connector is fitted into the space between the first and second hollow conductive members of the input/output terminal.

15. The battery pack of claim 1 , wherein the input/output terminal further comprises an insulating housing that surrounds an outer periphery of the second hollow conductive member and has a coupling portion for sliding coupling with the connector thereon.

16. The battery pack of claim 15 , wherein the coupling portion comprises a pair of coupling portions at two positions facing each other in a circumferential direction of the insulating housing.

17. The battery pack of claim 15 , wherein the connector further comprises an insulating cap that surrounds an outer periphery of the third hollow conductive member and comprises a lever member for detachable coupling with the input/output terminal.

18. A battery pack comprising a battery cell, an input/output terminal to/from which a charging/discharging current of the battery cell is to be inputted/outputted, and a connector detachably connected to the input/output terminal, wherein
the input/output terminal comprises a first hollow conductive member protruding in a first direction and a second hollow conductive member protruding to surround an outer periphery of the first hollow conductive member,
the connector comprises a central guide protruding in a second direction opposite to the first direction, and a third hollow conductive member protruding to surround an outer periphery of the central guide,
the central guide is fitted into a hollow portion of the first hollow conductive member,
the third hollow conductive member is fitted into a space between the first and second holl

Assignees

• Samsung Sdi Co Ltd

Inventors

• Ahn Jaepil
• Park Shidong
• Yun Chuljung
• LIM Jisoon

Classifications

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/70

  characterised by the mechanical construction · CPC title

• H01M50/561 Primary

  Hollow metallic terminals, e.g. terminal bushings · CPC title

• H01M10/46

  Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title