Invention Grant
- Patent Title: Voltage measurement circuit and energy storage apparatus
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Application No.: US17611818Application Date: 2020-05-25
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Publication No.: US12000899B2Publication Date: 2024-06-04
- Inventor: Yuki Matsuda , Masakatsu Fujimatsu
- Applicant: GS Yuasa International Ltd.
- Applicant Address: JP Kyoto
- Assignee: GS YUASA INTERNATIONAL LTD.
- Current Assignee: GS YUASA INTERNATIONAL LTD.
- Current Assignee Address: JP Kyoto
- Agency: MCGINN I.P. LAW GROUP, PLLC
- Priority: JP 19102224 2019.05.31
- International Application: PCT/JP2020/020491 2020.05.25
- International Announcement: WO2020/241548A 2020.12.03
- Date entered country: 2021-11-16
- Main IPC: G01R31/3835
- IPC: G01R31/3835 ; G01R31/396 ; H01M10/48

Abstract:
A voltage measurement circuit includes: voltage dividing circuits that divide voltages of energy storage devices, in respective stages connected in series; switches that cut off the currents of the voltage dividing circuits in the respective stages, and a measurement unit that measures the voltages of the energy storage devices in the respective stages based on outputs of the voltage dividing circuits in the respective stages. The voltage dividing circuits in the respective stages each have a first resistor connected to the ground and a second resistor connected to a positive electrode of the corresponding energy storage device. The switch in a predetermined-number stage among the switches in the respective stages is an N-channel field-effect transistor (FET) having a source connected to the first resistor and a drain connected to the second resistor, and the source of the FET is a voltage output terminal with respect to the measurement unit.
Public/Granted literature
- US20220244316A1 VOLTAGE MEASUREMENT CIRCUIT AND ENERGY STORAGE APPARATUS Public/Granted day:2022-08-04
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