Power tool, battery pack, and combination, and method of controlling the same

A battery pack, power tool, and power tool combination. The battery pack includes one or more battery cells, a first terminal electrically connected to the one or more battery cells, a high current power supply terminal, a power switch electrically connected between the one or more battery cells and the high current power supply terminal, and a low current power supply terminal electrically connected to the one or more battery cells. The first terminal and low current power supply terminal are operable to provide a substantially continuous low current to the power tool during a normal operating state of the battery pack. The battery pack also includes a controller operable to control the power switch to provide high current power through the high current power supply terminal in response to a call for power from the power tool. 本发明公开了电池组、电动工具以及电动工具的组合。电池组包括个或多个蓄电池单元、与个或多个蓄电池单元电连接的第端子、高电流电源端子、电连接在个或多个蓄电池单元与高电流电源端子之间的电力开关，以及电连接到个或多个蓄电池单元的低电流电源端子。第端子和低电流电源端子可操作以在电池组的正常操作状态期间向电动工具提供电力连接低电流。电池组还包括控制器，其可操作以响应于来自电动工