Secondary battery pack

Patent metadata

Field	Value
Publication number	US-10581035-B2
Application number	US-201615570824-A
Country	US
Kind code	B2
Filing date	Oct 24, 2016
Priority date	Dec 23, 2015
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

Provided is a secondary battery pack including: a cell assembly including a secondary battery, and a stacking frame supporting the secondary battery and stacked in a direction; a pack case having an internal space for accommodating the cell assembly, and having a through hole in internal and external directions; an electrode terminal electrically connected to the cell assembly and protruding to an outer part of the pack case by passing through the through hole; a bonding part filling a gap between the through hole and the electrode terminal in order to form an adhesive layer; and a bonding cover attached to the through hole of the pack case while surrounding a boundary of the electrode terminal above the bonding part.

First claim

What is claimed is:

1. A secondary battery pack comprising:
a cell assembly comprising a plurality of secondary batteries and a stacking frame supporting the plurality of secondary batteries, the plurality of batteries being stacked in a direction;
a pack case having an internal space for accommodating the cell assembly, and having a through hole in internal and external directions;
an electrode terminal electrically connected to the cell assembly and protruding to an outer part of the pack case by passing through the through hole;
a bonding part filling a gap between the through hole and the electrode terminal to form an adhesive layer; and
a bonding cover attached to the through hole of the pack case while surrounding a boundary of the electrode terminal above the bonding part, the bonding cover partially extending between the electrode terminal and the bonding part.

2. The secondary battery pack of claim 1 , wherein the bonding cover has a loop shape that is shrink-fitted to the electrode terminal.

3. The secondary battery pack of claim 1 , wherein the bonding cover comprises an outer circumferential part contacting an upper surface of the pack case at an outer part of the through hole, and an inner circumferential part that is shrink-fitted to the electrode terminal to contact a boundary surface of the electrode terminal and extends downward with respect to the outer circumferential part to be inserted into the through hole.

4. The secondary battery pack of claim 3 , wherein the inner circumferential part of the bonding cover is inclined with respect to the outer circumferential part of the bonding cover by an angle equal to or greater than 90° and less than 180°.

5. The secondary battery pack of claim 1 , wherein the pack case comprises a lower case having an open upper part and an accommodation space therein, and an upper case covering the open upper part of the lower case, and
the through hole is provided at a corner area of the upper case.

6. The secondary battery pack of claim 5 , wherein the electrode terminal comprises a body part fixedly coupled to the through hole, and a protrusion part extending from the body part to protrude to an outer part of the upper case.

7. The secondary battery pack of claim 5 , wherein the through hole comprises a lower hole part having a diameter through which at least the electrode terminal passes, and an upper hole part having a greater diameter than the diameter of the lower hole part.

8. The secondary battery pack of claim 7 , wherein the bonding part is provided at the upper hole part of the through hole.

9. The secondary battery pack of claim 8 , wherein the bonding cover is shrink-fitted to a body part of the electrode terminal and covers the upper hole part of the through hole.

10. The secondary battery pack of claim 1 , wherein the bonding cover comprises a plastic material.

11. The secondary battery pack of claim 1 , further comprising a terminal cover provided to cover an upper part and a part of a side surface of the electrode terminal, and comprising a hooking protrusion that is hook-coupled to and released from a stopper included in the pack case to allow the terminal cover to be attachable to/detachable from the pack case.

12. The secondary battery pack of claim 1 , wherein the electrode terminal is provided in plurality and includes a positive electrode terminal and a negative electrode terminal.

13. A vehicle comprising the secondary battery pack according to claim 1 .

14. The secondary battery pack of claim 1 , wherein the electrode terminal includes a vertical surface, and the bonding cover partially extends between the vertical surface of the electrode terminal and the bonding part.

15. The secondary battery pack of claim 1 , wherein, in the through hole of the pack case, the bonding cover overlaps the bonding part in both a horizontal direction and a vertical direction.

16. The secondary battery pack of claim 1 , wherein, the pack case includes an upper surface, the through hole being formed in the upper surface, and wherein a plane parallel to the upper surface extends through the electrode terminal, the bonding cover, and the bonding part.

Assignees

• Lg Chemical Ltd

Inventors

• Yu Sung-Chun
• Kim Do-Hyeon
• Seong Jun-Yeob

Classifications

• B60L50/64 Primary

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

• H01M2220/20

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

• H01M2/305

  Electricity · mapped topic

• H01M2/06 Primary

  Electricity · mapped topic

• H01M2/08

  Electricity · mapped topic