Patent ID: 8330426
Filing Date: 2012-12-11
Classification: B25F,H01M,H02J,Y02E

Abstract:
1. A charging system for electric power tool, comprising a battery pack and a battery charger, wherein the battery pack is used for driving an electric power tool and the battery pack has a rechargeable battery (B wherein the battery charger is detachably mounted with the battery pack and the battery charger has a charging unit, which supplies a charging power to the battery pack and charges the rechargeable battery (B wherein at least while the rechargeable battery (B when one of the battery-side microcomputer and the charger-side microcomputer detects an abnormality of the operational state of the microcomputer of the communication counterpart as a result of the mutual operation confirmation, a microcomputer which has detected the abnormality executes a predetermined charge stop processing for stopping charging of the rechargeable battery (B