Yang Dezhong,Zhang Qichun,Xu Haishen,Duan Junya,Du Hao
申请号：
US201615369261
公开号：
US9979208(B2)
申请日:
2016.12.05
申请国别(地区):
美国
年份:
2018
代理人:
Greenberg Traurig, LLP
摘要：
A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. Tool system includes a tool and a lithium based battery pack having a nominal voltage of at least 56 volts for supplying power to the tool. A heat absorbing device is associated with the battery pack and includes a phase-change material.
