Battery pack

Patent metadata

Field	Value
Publication number	US-9293793-B2
Application number	US-201113302502-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Mar 31, 2011
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A core pack and a battery pack using the same. A battery pack includes a plurality of bare cells electrically connected to one another. A protection circuit module (PCM) is positioned at an outside of the bare cells and electrically connected to the bare cells. A temperature measurement device is provided with a temperature sensing portion that senses the temperature of the bare cells, a contact portion connected to the PCM, and a connecting portion through which the temperature sensing portion and the contact portion are connected to each other. A case accommodates the bare cells, the PCM and the temperature measurement device. In the battery pack, the temperature sensing portion is positioned in a space formed between outer circumferential surfaces of bare cells disposed in parallel adjacent to each other. Accordingly, it is possible to improve the quality of the battery.

First claim

What is claimed is:

1. A battery pack, comprising:
a plurality of bare cells electrically connected to one another and directly contacted with each other;
a protection circuit module (PCM) positioned at an outside of the bare cells and electrically connected to the bare cells;
a temperature measurement device including:
a temperature sensing portion that senses the temperature of the bare cells;
a contact portion electrically connected to the PCM;
a connecting portion electrically connecting the temperature sensing portion to the contact portion; and
an insulating member that surrounds the temperature sensing portion and the connecting portion;

a case that accommodates the bare cells, the PCM and the temperature measurement device; and
a fixing member arranged above the temperature sensing portion, wherein both ends of the fixing member are respectively fixed to outer circumferential surfaces of the bare cells, wherein the temperature sensing portion is spaced apart from the case, and is positioned in a space between the outer circumferential surfaces of the bare cells formed by the bare cells directly contacted with each other.

2. The battery pack of claim 1 , further comprising a heat conducting means that is fixed in a space formed between the temperature sensing portion and the bare cells.

3. The battery pack of claim 2 , wherein the heat conducting means includes thermal silicon.

4. The battery pack of claim 1 , wherein the fixing member includes an insulating tape.

5. The battery pack of claim 1 , wherein a portion of the connecting portion is formed in a shape adjacent to and bent along an outer circumferential surface of one of the bare cells.

6. The battery pack of claim 1 , wherein a portion of the connecting portion is adjacent to and in parallel to the length direction of the bare cells.

7. The battery pack of claim 1 , wherein the connecting portion of the temperature measurement device is formed in an L shape obtained by bending one region thereof.

8. The battery pack of claim 1 , wherein the temperature measurement device is formed of a film type, wherein the connecting portion includes a conducting wire, the conducting wire being arranged on the insulating member, the insulating member being a film type insulating member.

9. The battery pack of claim 1 , wherein the contact portion of the temperature measurement device and the PCM are connected to each other through soldering.

10. The battery pack of claim 1 , wherein the connecting portion of the temperature measurement device has an elongated shape, and a portion of the connecting portion is bent along the outer circumferential surface of at least one of the bare cells.

11. The battery pack of claim 1 , the connecting portion having an L-shape that includes a bent portion separating a first portion from a second portion, the first portion being electrically connected to the PCM and extending transversely across one of the bare cells along an outer cylindrical surface of the one of the bare cells, the second portion including the temperature sensing portion at a distal end thereof, the second portion extending in parallel to a longitudinal direction of the one of the bare cells.

12. The battery pack of claim 1 , wherein each of the bare cells are cylindrical bare cells having curved side surfaces, wherein the plurality of bare cells include a first bare cell and a second bare cell, each having a longitudinal direction that is parallel to each other and having the curved side surfaces thereof directly contacting one-another along a length of each of the first and second bare cells, the temperature sensing portion being arranged in a vicinity of where the first and second bare cells directly contact one another.

13. The battery pack of claim 1 , at least two of the bare cells are cylindrical, are arranged adjacent to each other, extend in parallel to each other and form a nip at a location where outer cylindrical surfaces of the two bare cells directly contact each other, the temperature sensing portion being arranged in a vicinity of the nip, and a distal portion of the connecting portion extends in a direction parallel to said nip.

14. The battery pack of claim 1 , wherein a distal portion of the temperature measurement device that includes the temperature sensing portion extends in parallel to a longitudinal direction of the bare cells.

15. The battery pack of claim 1 , wherein the connecting portion is comprised of a conductive wire, wherein only the connecting portion and the temperature sensing portion are arranged within the insulating member.

16. A battery pack, comprising:
at least two cylindrical bare cells electrically connected to one another and directly contacted with each other, extending in parallel to each other and forming a nip at a location where outer cylindrical surfaces of the two cylindrical bare cells touch each other;
a protection circuit module (PCM) arranged at an outside of the bare cells and electrically connected to the bare cells;
a film-type temperature measurement device including a temperature sensing portion that senses a temperature of the bare cells, a contact portion electrically connected to the PCM, and a connecting portion electrically connecting the temperature sensing portion to the contact portion; and
a case that accommodates the bare cells, the PCM and the film-type temperature measurement device, wherein the temperature sensing portion is spaced apart from the case, and is positioned in the nip between the outer circumferential surfaces of the two cylindrical bare cells formed by the two cylindrical bare cells directly contacted with each other.

17. The battery pack of claim 16 , wherein a portion of the temperature measurement device corresponding to the temperature sensing portion is spaced apart from the case in a thickness direction of the battery pack by a gap, the gap being an empty space.

18. The battery pack of claim 16 , the film-type temperature measurement device further comprises:
a thermal silicon heat conductor arranged between the nip between the batteries and the temperature sensing portion; and
an insulating tape arranged on an opposite side of the film-type temperature sensing portion than the thermal silicon heat conductor, the insulating tape being attached to both of the cylindrical bare cells.

19. The battery pack of claim 16 , the connecting portion having an L-shape that includes a bent portion separating a first portion from a second portion, the first portion being electrically connected to the PCM and extending transversely across one of the bare cells along an outer cylindrical surface of the one of the bare cells, the second portion including the film-type temperature sensing portion at a distal end thereof, the second portion extending in parallel to the two cylindrical cells and to the nip.

20. The battery pack of claim 16 , wherein the two cylindrical cells directly contact each other along the nip, wherein a first portion of the film-type temperature measurement device is arranged directly on and extends along an outer cylindrical surface of one of the two cylindrical bare cells, and a second portion of the film-type temperature measurement device is arranged in a vicinity of and extends parallel to the nip.

Assignees

• Park Jin-Sung
• Yun Chul-Jung
• Samsung Sdi Co Ltd

Inventors

• Park Jin-Sung
• Yun Chul-Jung

Classifications

• H01M10/486 Primary

  for measuring temperature · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M10/6554

  Rods or plates · CPC title