Title:
BATTERY PACK AND ELECTRIC/ELECTRONIC DEVICE
Document Type and Number:
Japanese Patent JP3204160
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a battery pack and an electric/electronic apparatus which can surely prevent over-voltage to a battery pack without burning out a fuse of an electric electronic apparatus body.
SOLUTION: A battery pack 20 comprises a battery cell 21 such as a lithium ion secondary battery cell; an FET1 For preventing charge current from flowing excessively; an FET2 for preventing a discharge current from flowing excessively a resistance R3 for detecting a discharge current; an FET control circuit 22 for controlling the FET 1 and FET 2. In this constitution a value of flowing in the battery cell 21 is detected by voltages of both ends of the resistance R2, and when a value of the discharge current (I discharge) becomes a current value (I th) or more, the FET 2 is turned off, and also the FET1 is off.
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Inventors:
Izuru Narita
Application Number:
JP12044997A
Publication Date:
September 04, 2001
Filing Date:
May 12, 1997
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
H02J7/10; H01M10/44; H01M10/46; H01M50/572; (IPC1-7): H01M10/44; H02J7/10
Domestic Patent References:
| JP1012282A | ||||
| JP9327130A |
Attorney, Agent or Firm:
Hiroshi Sakaguchi (1 person outside)