Protection device for a chargeable battery

Abstract

A protection device for a rechargeable battery connected between a main current source and a large amperage power source, the protection device includes: a first protection loop which has: a main current load and a battery (set) connected to a main circuit; and a thermocouple sensing switch connected to the battery (set) and the main circuit; a second protection loop which has: a protection circuit connected to the main circuit and checking voltage of the battery to output an activation signal; and a heater next to the thermocouple sensing switch. When the battery is in over-charged or over-discharged condition, the protection circuit outputs a control signal to turn on the semiconductor switch and the thermocouple sensing switch related to the heater.

Dependencies are inferred from the claim text.