Patent ID: 7696720
Filing Date: 2010-04-13
Classification: H01M,Y02E

Abstract:
1. A battery pack comprising: a battery; an output terminal outputting an output of the battery to the outside; detection means for detecting a shock and outputting a detected value dependent on the detection; output control means for cutting off the output of the battery from the output terminal when the detected value of the detection means is equal to or greater than a predetermined threshold value; and a storage unit storing a shock history which is a history of shock detected by the detection means, wherein the output terminal is a pair of terminals connected to the battery, wherein the output control means further includes: wherein, when the detected value of the detection means is equal to or greater than a threshold value, the control unit stores the detected value and a number of times of the detected value exceeding the threshold value as the shock history into the storage unit, and wherein, when the control unit detects the instruction signal, the control unit reads the shock history from the storage unit, and turns on the switch when the number of times of the detected value exceeding the threshold value is equal to or less than a predetermined value so that a current path forms between the battery and the pair of output terminals to allow the current to flow, or leaves the switch unchanged at the off state when the number of times of the detected value exceeding the threshold value is greater than the predetermined value.