Electricity: battery or capacitor charging or discharging – Battery or cell charging – With thermal condition detection
Patent
1998-11-13
2000-09-12
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With thermal condition detection
320162, 320112, H02J 700
Patent
active
061182559
ABSTRACT:
An over-charging voltage is supplied from a voltage detecting circuit 39 to a priority controlling circuit 46 and a switch circuit 43. A voltage detecting circuit 41 detects a terminal voltage of a secondary battery BT (namely, an over-charging voltage) and supplies the voltage to the switching circuit 43. A current that flows in a resistor 42 is supplied to a cumulating circuit 40 and the switch circuit 43. The cumulating circuit 40 adds a voltage received from the voltage detecting circuit 39 through the priority controlling circuit 46 and a current that flows in the resistor 42 and supplies the added result as a control signal to a charging portion PS. A temperature detecting circuit 44 detects the temperature of a battery pack BP. The detected result is supplied to the switch circuit 43 and a detected voltage switching circuit 45. The switch circuit 43 performs on/off operations corresponding to the received voltage, terminal voltage, current, and temperature. The detected voltage switching circuit 45 switches the voltage of the voltage detecting circuit 39 corresponding to the detected result of the temperature.
REFERENCES:
patent: 5600230 (1997-02-01), Dunstan
patent: 5744937 (1998-04-01), Cheon
patent: 5764030 (1998-06-01), Gaza
patent: 5926007 (1999-07-01), Okada
patent: 5994875 (1999-11-01), Lee
patent: 5994878 (1999-11-01), Ostergaard et al.
Nagai Tamiji
Suzuki Kuniharu
Takei Toshitaka
Maioli Jay H.
Sony Corporation
Toatley , Jr. Gregory J.
Wong Peter S.
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