Battery pack

Patent metadata

Field	Value
Publication number	US-10186704-B2
Application number	US-201514953815-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Aug 7, 2015
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A battery pack includes a plurality of electrode assemblies, a lower housing including a plurality of receiving parts that receive the plurality of electrode assemblies, an upper cap coupled to a top portion of the lower housing, the upper cap sealing the plurality of receiving parts, and an upper housing combined with the lower housing.

First claim

What is claimed is:

1. A battery pack, comprising:
a plurality of electrode assemblies;
a lower housing including a bottom surface, a pair of long side surfaces upwardly extending from the bottom surface and a pair of short side surfaces connecting the pair of long side surfaces, the lower housing including a plurality of receiving parts that receive the plurality of electrode assemblies and barriers located between each of the plurality of receiving parts, the barriers being parallel to the long side surfaces, the barriers including connecting grooves into which electrode tabs of adjacent electrode assemblies among the plurality of electrode assemblies are bent and placed and the pair of long side surfaces include draw-out grooves into which electrode tabs of outermost electrode assemblies among the plurality of electrode assemblies are bent and drawn out;
an upper cap coupled to a top portion of the lower housing, the upper cap sealing the plurality of receiving parts, wherein the upper cap includes:
a flat main plate including a bottom surface;
receiving protrusions that protrude from the bottom surface of the main plate and engage with the receiving parts;
connecting protrusions that protrude from the bottom surface the main plate and engage with the connecting grooves; and
draw-out protrusions that protrude from the bottom surface of the main plate and engage with the draw-out grooves; and
an upper housing combined with the lower housing.

2. The battery pack as claimed in claim 1 , wherein:
the lower housing and the upper cap are made of a plastic material, and
the upper cap and the lower housing are welded to each other by ultrasonic welding to be integrally coupled with each other.

3. The battery pack as claimed in claim 1 , wherein:
each of the electrode tabs of the outermost electrode assemblies drawn out from the draw-out grooves includes a sealing member, and
the each of the electrode tabs of the outermost electrode assemblies are bent upwardly from the draw-out grooves and are mounted on the upper cap.

4. The battery pack as claimed in claim 3 , further comprising electrode terminals combined with and passing through the upper housing, the electrode terminals being electrically connected to the electrode tabs mounted on the upper cap.

5. The battery pack as claimed in claim 1 , wherein each of the receiving protrusions includes an electrolyte injection hole into which an electrolyte is injected and a safety vent.

6. The battery pack as claimed in claim 1 , wherein:
the top portion of the lower housing includes a stepped portion having a fastening groove, and
an inner surface of the upper housing includes a fastening protrusion that engages with the fastening groove.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Bang Wonkyu

Classifications

• H01M50/112 Primary

  Monobloc comprising multiple compartments · CPC title

• H01M50/591

  Covers · CPC title

• H01M50/169

  by welding, brazing or soldering · CPC title

• H01M50/16

  Organic material · CPC title

• H01M50/184

  characterised by their shape or structure · CPC title