Battery pack and backup power supply device utilizing the battery pack

Abstract

A battery pack for use as a backup power supply device for various electronic devices has a rechargeable battery group having a plurality of cylindrical rechargeable batteries connected in series and/or parallel and arranged in horizontal flat arrays as a flat block, and an electronic circuit for controlling charging of the rechargeable battery group. Two heat radiating plates sandwich opposite surfaces of the rechargeable batteries of the rechargeable battery group and are held against circumferential surfaces of the rechargeable batteries. A battery case houses an electronic circuit positioned at an end in the direction of the arrays of the rechargeable batteries and surrounds the rechargeable battery group to accommodate them therein. The battery case supports the heat radiating plates so as to be exposed to the exterior. The battery pack is compact and free of thermal problems with the rechargeable batteries.

Dependencies are inferred from the claim text.