Charge and discharge control circuit

Details Charge and discharge control circuit Charge and discharge control circuit

1998-02-09

1999-09-28

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320164, 320155, H02J 700

Patent

active

059594373

ABSTRACT:
To obtain a required delay time at each control using one capacitor in common, a charge and discharge control circuit includes an overcharge detecting circuit, an overdischarging circuit, and an overcurrent detecting circuit and carries out charge and discharge control of a secondary cell by ON/OFF control. A delay circuit includes plural current sources or a resistor and a single capacitor to obtain a varying delay time in response to a signal from outside. The charge and discharge control circuit operates the delay circuit so that a required delay output is obtained from the delay circuit by a first control circuit and ON/OFF controls a switch circuit by a second control circuit so that a required charge and discharge control is carried out with delay by the delay output.

REFERENCES:
patent: 5493197 (1996-02-01), Eguchi et al.
patent: 5547775 (1996-08-01), Eguchi et al.
patent: 5703463 (1997-12-01), Smith
patent: 5742148 (1998-04-01), Sudo et al.
patent: 5796240 (1998-08-01), Saito et al.

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