Dezhong Yang,Qichun Zhang,Haishen Xu,Junya Duan,Hao Du
申请号：
US15369261
公开号：
US20170149254A1
申请日:
2016.12.05
申请国别(地区):
US
年份:
2017
代理人:
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.
