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Patent application: Cordless tool system

Ben Welter - Wednesday, May 31, 2017
U.S. patent application 20170149254 (applicant Chervon Ltd., Hong Kong): 

"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. ... [The] phase-change material comprises a mixture of sodium acetate, sodium dodecyl benzene sulfonate, carboxymethyl cellulose, and sodium carbonate."


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