Charge/discharge control circuit and chargeable electric power s

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – Regulated discharging

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320165, H01M 1046

Patent

active

059821507

ABSTRACT:
A charge/discharge control circuit is provided for an electric power source apparatus in which a service life is prolonged. A voltage dividing circuit, an overcharge voltage detection circuit, an overdischarge voltage detection circuit and a control circuit are connected in parallel to a secondary cell which is an electric power source, wherein the control circuit detects a condition of the secondary cell from the overcharge/overdischarge voltage detection circuits and outputs a signal Vs for controlling a power supply to an external equipment and a charge by an external power source and controls a switching element provided in series with the voltage dividing circuit and reduces a current which flows through the voltage dividing circuit.

REFERENCES:
patent: 5825155 (1998-10-01), Ito et al.

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