BATTERY PACK, CHARGING COMBINATION, ELECTRIC TOOL AND DISCONNECTION DETECTION METHOD

摘要

A battery pack, a charging combination, an electric tool and a disconnection detection method. The battery pack (100) comprises: a plurality of serially connected units (111); a voltage detection module (14) for detecting voltage signals of the plurality of serially connected units; a battery pack control module (16) for receiving the voltage signals detected by the voltage detection module and calculating voltage values of the serially connected units, wherein the serially connected units comprise more than two battery cores (111a), a plurality of battery cores in one serially connected unit are connected in parallel, and the battery pack control module can judge whether battery cores which are disconnected exist in the serially connected unit. The battery pack can guarantee secure use.