A residual quantity measuring device is provided. The residual quantity measuring device includes a Hall element that is inserted into a path of a current flowing in a battery unit and outputs an output voltage associated with the current; and a Coulomb counter configured to be supplied with the output voltage of the Hall element via a voltage conversion circuit and to detect a total quantity of a current flowing into the battery unit and a current flowing out of the battery unit.
RESIDUAL QUANTITY MEASURING DEVICE, BATTERY PACK, ELECTRIC POWER TOOL, ELECTRIC AIRCRAFT, ELECTRIC VEHICLE, AND POWER SUPPLY DEVICE
2018-07-19
Patent
Electronic Resource
English
European Patent Office | 2021
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