Control system for charging batteries and electronic apparatus u

Details Control system for charging batteries and electronic apparatus u Control system for charging batteries and electronic apparatus u

1995-12-26

1998-04-14

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 2, 320 39, 320 32, H02J 700

Patent

active

057396671

ABSTRACT:
A control system for charging enabling efficient charging of rechargeable batteries in an electronic apparatus which charges its rechargeable batteries by using a charger circuit when driving the apparatus by using an external power source, including first detecting unit for detecting a differential value between a maximum permissible charging current allowed by the rechargeable batteries and a charging current flowing to the rechargeable batteries; second detecting unit for detecting a maximum usable current by detecting a differential value between a maximum supplyable current allowed by the external power source and the current consumption of the apparatus; third detecting unit for detecting a differential value between a maximum useable current and the charging current flowing to the rechargeable batteries; and control unit for controlling the system in accordance with the differential values detected by the first and third detecting units so that the charger circuit generates the maximum charging current within the range where the charging current flowing to the rechargeable batteries does not exceed either of the maximum permissible charging current and the maximum useable current.

REFERENCES:
patent: 5150031 (1992-09-01), James et al.
patent: 5191277 (1993-03-01), Ishikura et al.
patent: 5307002 (1994-04-01), Ho et al.
patent: 5349282 (1994-09-01), McClure
patent: 5355073 (1994-10-01), Nguyen
patent: 5371456 (1994-12-01), Brainard
patent: 5382893 (1995-01-01), Dehnel
patent: 5465039 (1995-11-01), Narita et al.
patent: 5545969 (1996-08-01), Hasegawa

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