Battery pack

Patent metadata

Field	Value
Publication number	US-2016372736-A1
Application number	US-201514900496-A
Country	US
Kind code	A1
Filing date	May 12, 2015
Priority date	Jun 5, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

Disclosed is a battery pack with an improved structure to support a torque applied to a terminal bolt when a nut is coupled to the terminal bolt which is exposed out of the battery pack and serves as a connection terminal. The battery pack includes a cell assembly having a plurality of secondary batteries, a pack housing having an inner space to accommodate the cell assembly therein, a terminal bolt configured to protrude out of the pack housing, a center plate located at an upper portion of the cell assembly in the inner space of the pack housing and having an insert groove formed therein, and a bus bar having one end electrically connected to an electrode terminal of the cell assembly and the other end connected to the terminal bolt by contact, the bus bar being inserted into the insert groove of the center plate.

First claim

1 . A battery pack, comprising:
a cell assembly having a plurality of secondary batteries; a pack housing having an inner space to accommodate the cell assembly therein; a terminal bolt configured to protrude out of the pack housing; a center plate located at an upper portion of the cell assembly in the inner space of the pack housing and having an insert groove formed therein; and a bus bar having one end electrically connected to an electrode terminal of the cell assembly and the other end connected to the terminal bolt by contact, the bus bar being inserted into the insert groove of the center plate.

2 . The battery pack according to claim 1 ,
wherein the bus bar has a bent portion, and the bent portion is inserted into the insert groove of the center plate.

3 . The battery pack according to claim 2 ,
wherein the bent portion is bent in a lower direction, the insert groove of the center plate is formed in a lower direction, and the bent portion is inserted into the insert groove in a lower direction from an upper side.

4 . The battery pack according to claim 2 ,
wherein the bent portion is formed at a terminal of the other end of the bus bar.

5 . The battery pack according to claim 2 ,
wherein the bus bar has at least two bent portions and at least two insert grooves formed therein.

6 . The battery pack according to claim 2 ,
wherein the terminal bolt has a cover protrusion inserted into the insert groove together with the bent portion to surround at least a part of the bent portion.

7 . The battery pack according to claim 1 ,
wherein the terminal bolt has a body, an upper protrusion and a lower protrusion.

8 . The battery pack according to claim 7 ,
wherein a thread is formed in an outer side of the upper protrusion for the coupling of a nut thereto.

9 . The battery pack according to claim 7 ,
wherein a coupling hole is formed in the other end of the bus bar, and wherein the lower protrusion is formed at least partially to pass the coupling hole of the bus bar, and a thread is formed in an outer side of the lower protrusion so that a nut is coupled thereto.

10 . The battery pack according to claim 7 ,
wherein the bus bar comes into contact with at least a part of a lower surface of the body of the terminal bolt and at least a part of a side of the body of the terminal bolt.

11 . The battery pack according to claim 1 ,
wherein the bus bar is placed on an upper portion of the center plate.

12 . The battery pack according to claim 1 ,
wherein at least one of a battery management system (BMS), a current sensor, a relay and a fuse is mounted to an upper portion of the center plate.

13 . The battery pack according to claim 1 ,
wherein the terminal bolt protrudes out through a through hole of the pack housing, and a sealing member for sealing a space between the terminal bolt and the through hole is further provided.

14 . A vehicle, which comprises the battery pack defined in claim 1 .

Assignees

• Lg Chemical Ltd
• Lg Chemical Ltd

Inventors

• Kim Ki-Youn
• Seong Jun-Yeob
• Eom Young-Sop
• Yu Sung-Chun
• Kang Dal-Mo

Classifications

• B60L50/64 Primary

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/522

  Inorganic material · CPC title

• H01M50/296

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title

• H01M50/586

  inside the batteries, e.g. incorrect connections of electrodes · CPC title