Multi-battery pack for power tools
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United States of America Patent
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Jun 6, 2017
Grant Date -
Nov 19, 2015
app pub date -
May 15, 2015
filing date -
May 16, 2014
priority date (Note) -
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Abstract
A power tool including a motor, a first battery pack, a second battery pack, a first switching element coupled between the first battery pack and the motor, a second switching element coupled between the second battery pack and the motor, and controller coupled to the first switching element and the second switching element. The controller includes a first pulse-width modulation (PWM) output coupled to the first switching element and a first PWM signal to selectively close the first switching element. The controller further includes a second PWM output coupled to the second switching element and a second PWM signal to selectively close the second switching element.
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