CORDLESS POWER TOOL, DETACHABLE BATTERY PACK, CHARGER, AUXILIARY MOVING DEVICE FOR FLUID, AND TEMPERATURE CHANGING MECHANISM FOR BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To dissipate the heat of a battery pack during the charge of cells and discharge when the battery pack is used. SOLUTION: This cordless power tool 20 has a housing 22 which has a mechanism 24 coupled with a detachable battery pack 26. The battery pack 26 has one or more battery cells 36 and an exhaust system in a housing 34 of the battery pack 26, and the exhaust system enables moving of the fluid through the housing. The mechanism 24 is associated with the battery pack 26 so as to dissipate the heat from the battery pack 26.