Patent ID: 6310464
Filing Date: 2001-10-30
Classification: H01M,H02J,Y02E

Abstract:
A battery charging device for an electric car comprising:an electric car battery pack adapted to charge by receiving power and to discharge by supplying power;an electric car battery charge controller;an electric car battery charger for receiving external power, wherein the charger is interconnected with the charge controller and the battery pack and charges the battery pack under control of the charge controller;an electric car battery charge controller capable of detecting the charge status of the battery pack, and upon detecting an under-charge condition of initializing, at any given time, a charging process wherein the battery pack is charged an expected charge amount, the expected charge amount being dependant on the degree of under-charge initially detected by the controller; andthe charge controller, upon termination of the charging process, being further capable of detecting the actual charge amount and of comparing that amount to the expected charge amount and of calculating a difference value, wherein if the difference value exceeds a predetermined reference value, the controller charges the battery pack an additional predetermined amount.