Patent ID: 8940427
Filing Date: 2015-01-27
Classification: H01M,Y02E,Y02P

Abstract:
1. A rechargeable battery pack attachable to a power tool, the rechargeable battery pack comprising: a rechargeable battery; a display element provided in such a manner that a lighted state thereof can be confirmed from outside; a remaining capacity detection device that detects a remaining capacity of the rechargeable battery; a remaining capacity display control device that displays the remaining capacity detected by the remaining capacity detection device by controlling the lighted state of the display element; an abnormality detection device that detects an abnormality of the rechargeable battery; a determination device that determines whether or not an operation switch of the power tool has been operated when the rechargeable batter sack is attached to the power tool; and an abnormality display control device that displays the abnormality of the rechargeable battery, even when the determination device determines that the operation switch of the power tool has been operated, detected by the abnormality detection device by controlling the lighted state of the display element to an abnormality display state, which is different from a remaining capacity display state controlled by the remaining capacity display control device.