Power tool electronics
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United States of America Patent
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Mar 27, 2018
Issued Date -
N/A
app pub date -
Jul 29, 2016
filing date -
Jul 29, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A battery waking circuit and a battery leakage circuit are provided. The battery waking circuit includes a first battery pack and a second battery pack connected in series and a first switch connected to the first battery pack along a first current path. An electronic controller coupled to and controlling the first witch is configured to detect a trigger actuation and close the first switch based on detecting the trigger actuation to draw a wake-up current on the first current path from the first battery pack. The electronic controller is also configured to control a motor to draw a load current along a second current path after the first battery pack is woken up. The battery leakage circuit also includes a switch connected in series with the capacitor and a trigger switch controlling the switch such that the switch prevents a flow of leakage current through the capacitor when the trigger is not actuated.
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