Battery charging in units having attachable expansion devices, a

Details Battery charging in units having attachable expansion devices, a Battery charging in units having attachable expansion devices, a

1997-07-28

1999-11-09

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

For battery pack

H01M 1046, H01M 1044

Patent

active

059821418

ABSTRACT:
An electronic apparatus system in which an electronic apparatus such as a personal computer and an expansion device are combined so as to be freely joined and separated. A charging circuit, a control circuit, and a chargeable battery are provided for each of the electronic apparatus and the expansion device. In a state in which the electronic apparatus and the expansion device are separated, the control circuit of the electronic apparatus controls the charging circuit of the electronic apparatus, thereby charging the battery of the electronic apparatus. The control circuit of the expansion device controls the charging circuit of the expansion device, thereby charging the battery of the expansion device.

REFERENCES:
patent: 4893263 (1990-01-01), Myers
patent: 5058045 (1991-10-01), Ma
patent: 5175671 (1992-12-01), Sasaki
patent: 5290178 (1994-03-01), Ma
patent: 5602455 (1997-02-01), Stephens et al.

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