OVERCHARGE/OVERDISCHARGE PREVENTING DEVICE AND OVERDISCHARGE PREVENTING DEVICE

• Main Authors: MURANO KANJI, SANPEI AKIRA
• Format: Patent
• Language: English
• Published: 09.05.2003
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To prevent overcharge and overdischarge of non-aqueous secondary battery. SOLUTION: The overcharge/overdischarge preventing device has a voltage detection means for detecting voltage between the opposite ends of each battery and a switching means provided in series to the batteries between respective charging terminals and discharging terminals. When the voltage of the respective batteries exceeds a predetermined value during charging, the switching means is turned off based on each output of the voltage detecting means to shut off the discharge current. When the voltage of the respective batteries drops below the predetermined value during discharging, the switching means is turned off based on the output of the voltage detection means to shut off the discharge current.