BATTERY PACK AND MONITORING METHOD FOR REMOVAL OF SECONDARY BATTERY IN BATTERY PACK

A battery pack capable of preventing an altered battery pack from being manufactured by a simple structure and a simple construction is provided. The battery pack includes a plurality of secondary batteries 20, a housing 30 storing the plurality of secondary batteries, and an inspection circuit 70 stored in the housing 30. The housing 30 includes a main body section 40 and a closing member 50 to close an opening 44 for taking the plurality of secondary batteries 20 in and out of the main body section 40, and includes a plurality of fixing members for fixing the closing member 50 on the main body section 40, the plurality of fixing members being made of a conductive material. An attachment state of the fixing members with respect to the closing member 50 and the main body section 40 is monitored by the inspection circuit 70, and an attachment order of the fixing members with respect to the closing member 50 and the main body section 40 is memorized by the inspection circuit.