Patent ID: 7688038
Filing Date: 2010-03-30
Classification: H02J

Abstract:
1. A battery charging apparatus having plurality of charge terminals and two discharge terminals which connect plurality of secondary batteries of a battery pack to form a discharge path and plurality of discharge paths, comprising: a main switch provided on said discharge path; a main controller connecting said battery pack and said main switch and providing a control signal to said main switch for setting said main switch in OFF state to cut off said discharge path when an under-voltage condition of said battery pack or a short condition of said discharge path is detected in discharge state; plurality of sub switches provided on said charge paths; plurality of sub controllers connecting corresponding secondary batteries of said battery pack and sub switches, said sub controllers providing control signals to corresponding sub switches to be set in OFF state for cutting off corresponding charge paths when an over-voltage condition or an over-current condition of corresponding secondary batteries of said battery pack or a short condition of corresponding charge paths is detected in charge state; a first and a second temperature sensors attached to said main switch and said battery pack respectively; a temperature switch connecting said sub switches; and a thermal controller connecting said main controller, said first and second temperature sensors and said temperature switch, said thermal controller providing a control signal to said main controller to set said main switch in OFF state when an over-temperature condition of said main switch is detected by said first temperature sensor in discharge state, said thermal controller providing a control signal to said temperature switch to set said sub switches in OFF state when an over-temperature condition of said battery pack is detected by said second temperature sensor in charge state.