BIDIRECTIONAL BATTERY CHARGE CONTROLLER

摘要

A bidirectional battery charge control system for a portable electronic device that uses a rechargeable main battery. The system enables the connection of an auxiliary battery (16) to the device for inputting additional current to the device. A bidirectional charger (22) performs control of the current flow into and out of the auxiliary battery. The auxiliary battery can contain one or more readily available primary or secondary cells, and the bidirectional charger is such that an external charger connected to the device, generally used to charge the main rechargeable battery of the device, can also recharge a secondary cell or cells in the auxiliary battery, if such are installed. The use of such an auxiliary battery enables the main battery to be hard-wired into the device.