Protection circuit module with thermistor and battery pack including the same

Patent metadata

Field	Value
Publication number	US-9496587-B2
Application number	US-201113100501-A
Country	US
Kind code	B2
Filing date	May 4, 2011
Priority date	Jul 29, 2010
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A protection circuit module with a thermistor and a battery pack including the same. In one embodiment, a battery pack includes a protection circuit module and one or more bare cells. The protection circuit module includes a printed circuit board (PCB) having a protection circuit portion, a flexible film electrically connected to the PCB, and a thermistor mounted on the flexible film and configured to sense a temperature of bare cells and transfer the sensed temperature to the PCB. The one or more bare cells are electrically connected to the protection circuit module. Accordingly, the thermistor is mounted on the flexible film, so that it is possible to obtain the reliability of measuring the temperature of the battery pack.

First claim

What is claimed is:

1. A battery pack comprising:
a protection circuit module comprising a printed circuit board having a protection circuit portion, a flexible printed circuit board ectrically connected to the printed circuit board, and a thermistor mounted on the flexible printed circuit board; and
a plurality of bare cells electrically connected to the protection circuit module, wherein the flexible printed circuit board is configured to sense a temperature of the plurality of bare cells and transfer the sensed temperature to the printed circuit board, and the flexible printed circuit board comprises:
a flexible substrate and an insulating film on the flexible substrate, the thermistor being between the flexible substrate and the insulating film,
a heat transfer thin film on the flexible substrate, and
a protection layer on the heat transfer thin film.

2. The battery pack according to claim 1 , wherein the thermistor is mounted on a surface of the flexible printed circuit board facing the plurality of bare cells.

3. The battery pack according to claim 1 , wherein the thermistor is mounted on an interior of the flexible printed circuit board facing the plurality of bare cells.

4. The battery pack according to claim 1 , wherein the flexible printed circuit board is formed with a plurality of layers, and the thermistor is between the plurality of layers.

5. The battery pack according to claim 4 , wherein the FPCB is configured to expose a portion of the thermistor to face the bare cells.

6. The battery pack according to claim 1 , wherein the heat transfer thin film is composed of aluminum.

7. The battery pack according to claim 1 , wherein bare cells of the plurality of bare cells are connected in series or in parallel, and the thermistor is adjacent to the plurality of bare cells.

8. The battery pack according to claim 7 , wherein the thermistor is configured to sense the temperature of the plurality of bare cells adjacent to the thermistor.

9. The battery pack according to claim 7 , wherein the thermistor is mounted at identical distance from each of the plurality of bare cells.

10. The battery pack according to claim 7 , wherein the protection circuit module and the thermistor are connected by a patterned circuit formed on the flexible printed circuit board.

Assignees

• Jung Yeon Sung
• Samsung Sdi Co Ltd

Inventors

• Jung Yeon Sung

Classifications

• H01M10/486 Primary

  for measuring temperature · CPC title

• H02H5/044

  using a semiconductor device to sense the temperature · CPC title

• H01M10/65

  Means for temperature control structurally associated with the cells · CPC title

• H01M50/572 Primary

  Means for preventing undesired use or discharge · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title