US 2003/0157399 A1 · Battery pack and method of producing the same

Abstract

The protection circuit unit 52 is an integrated body comprising a surface-mount type PTC thermistor 49 mounted by a soldering on a printed circuit board 44 through reflow soldering or the like soldering method together with a protection IC 45 and a FET unit 46. The surface-mount type PTC thermistor 49, as compared with a PTC thermistor with leads, can be mounted readily on the printed circuit board 44, without requiring bending and welding work of a lead to be connected to a negative terminal of prismatic battery cell 41, for forming a circuit. As a result, change in a resistance due to a bending stress, a thermal stress, etc. can be eliminated. Furthermore, a degree of thermal coupling with the battery cell 41 can be adjusted by changing a location of the thermistor 49. Thus, varieties of control functions can be implemented.

Claims34

Dependent claims

(Amended) A battery pack comprising:

a battery cell;
and
a protection circuit unit for protecting said battery cell from overcurrent or overheating, wherein
said protection circuit unit is an integrated body containing a protection IC and a printed circuit board mounted with a surface-mount type PTC thermistor.

1 more element

Dependencies are inferred from the claim text.

Battery pack and method of producing the same

Life of this patent

Battery pack and method of producing the same

Life of this patent

Abstract

Claims34