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US 10,705,150 B2Granted
Remaining battery charge measuring circuit, electronic device, and remaining battery charge measuring method
AssigneeFujitsu Limited
InventorJun-ichi Nagata
Life of this patent
Estimating the term…
Abstract
A remaining battery charge measuring circuit for measuring remaining charge of a battery, includes: an LC circuit including an inductance element and a capacitance element; and a switch element that controls coupling between the battery and the LC circuit, wherein the switch element disconnects the LC circuit from the battery, based on a resonant frequency by the LC circuit.
Claims12
A remaining battery charge measuring circuit for measuring remaining charge of a battery, comprising:
- an LC circuit including an inductance element and a capacitance element;
- and
- a switch element that controls coupling between the battery and the LC circuit,
- wherein the switch element disconnects the LC circuit from the battery, based on a resonant frequency by the LC circuit,
- wherein the remaining battery charge measuring circuit further includes a controller configured to:
- detect a capacitance element voltage of the capacitance element:
- and
- turn OFF the switch element at a timing at which the detected capacitance element voltage is minimized.
5 more elements
A remaining battery charge measuring method for measuring remaining charge of a battery, comprising:
- measuring remaining charge of the battery by an LC circuit including an inductance element and a capacitance element;
- disconnecting, by a switch element provided between the LC circuit and the battery, the LC circuit from the battery at a timing of an n-th period of resonance generated by the LC circuit, n being an integer of one or greater;
- detecting, by a controller, a capacitance element voltage of the capacitance element;
- and
- turning OFF, by the controller, the switch element at a timing at which the detected capacitance element voltage is minimized.
2 more elements
An electronic device comprising:
- a battery;
- and
- a remaining battery charge measuring circuit coupled to the battery and includes:
- an LC circuit including an inductance element and a capacitance element;
- and
- a switch element that controls coupling between the battery and the LC circuit,
- wherein the switch element disconnects the LC circuit from the battery, based on a resonant frequency by the LC circuit,
- wherein the remaining battery charge measuring circuit further includes a controller configured to:
- detect a capacitance element voltage of the capacitance element:
- and
- turn OFF the switch element at a timing at which the detected capacitance element voltage is minimized.
8 more elements
Dependencies are inferred from the claim text.