Battery module having swelling gauge, and battery pack comprising same

Patent metadata

Field	Value
Publication number	US-12368203-B2
Application number	US-202418657302-A
Country	US
Kind code	B2
Filing date	May 7, 2024
Priority date	Jan 8, 2019
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A battery module includes a module housing, a gauge hole formed in the module housing, a plurality of battery cells in the module housing, a cell pressing plate accommodated in the module housing, and a swelling gauge provided to protrude from a surface of the cell pressing plate. The plurality of battery cells have a normal state and a swelling state. An end of the swelling gauge extends outside the module housing when the plurality of battery cells are in the normal state.

First claim

What is claimed is:

1. A battery module, the battery module comprising:
a module housing;
at least two gauge holes formed in the module housing;
a plurality of battery cells in the module housing;
a cell pressing plate accommodated in the module housing; and
at least two swelling gauges provided to protrude from a surface of the cell pressing plate,
wherein the plurality of battery cells have a normal state and a swelling state, and
wherein an end of each swelling gauge extends outside the module housing when the plurality of battery cells are in the normal state.

2. The battery module according to claim 1 , wherein the cell pressing plate being between the plurality of battery cells and the at least two swelling gauges.

3. The battery module according to claim 2 , wherein the cell pressing plate and the at least two swelling gauges are integrally formed.

4. The battery module according to claim 2 , wherein the at least two swelling gauges include:
a first swelling gauge located at the center of the cell pressing plate; and
a second swelling gauge at a first longitudinal edge regions of the cell pressing plate, and
a third swelling gauge at a second longitudinal edge region of the cell pressing plate.

5. The battery module according to claim 1 , wherein each swelling gauge has a scale indicating an amount each swelling gauge extends outside the module housing.

6. The battery module according to claim 1 , further comprising:
a buffering member interposed between the cell pressing plate and the module housing.

7. The battery module according to claim 6 , wherein the buffering member is a leaf spring.

8. The battery module according to claim 2 , further comprising:
a buffering member interposed between the cell pressing plate and the module housing.

9. The battery module according to claim 8 , wherein the buffering member is a leaf spring.

10. The battery module according to claim 1 , wherein each swelling gauge moves freely within a respective gauge hole.

11. The battery module according to claim 1 , wherein each gauge hole has no obstructions to the movement of the at least two swelling gauges.

12. A battery pack, comprising the battery module according to claim 1 .

13. The battery module according to claim 1 , wherein the swelling gauge is a linear member.

14. A battery module, the battery module comprising:
a module housing;
a gauge hole formed in the module housing;
a plurality of battery cells in the module housing;
a cell pressing plate accommodated in the module housing;
a swelling gauge provided to protrude from a surface of the cell pressing plate; and
a leaf spring interposed between the cell pressing plate and the module housing,
wherein the plurality of battery cells have a normal state and a swelling state, and
wherein an end of the swelling gauge extends outside the module housing when the plurality of battery cells are in the normal state.

Assignees

• Lg Energy Solution Ltd

Inventors

• Seo Sung-Won
• Kang Dal-Mo
• Mun Jeong-O
• Lee Yoon-Koo
• Ju Eun-Ah

Classifications

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/242

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M10/48 Primary

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/488 Primary

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title