Invention Grant
- Patent Title: Battery monitoring device
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Application No.: US16921036Application Date: 2020-07-06
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Publication No.: US11644512B2Publication Date: 2023-05-09
- Inventor: Tomomichi Mizoguchi
- Applicant: DENSO CORPORATION
- Applicant Address: JP Kariya
- Assignee: DENSO CORPORATION
- Current Assignee: DENSO CORPORATION
- Current Assignee Address: JP Kariya
- Agency: Oliff PLC
- Priority: JP 2019125476 2019.07.04
- Main IPC: G01R31/389
- IPC: G01R31/389 ; G01R31/396 ; H02J7/00 ; H01M10/48 ; H01M10/44

Abstract:
A battery monitoring device includes: an oscillator causing an AC signal to flow in the battery cell; a subtractor acquiring voltage fluctuation of the battery cell when the AC signal flows as a response signal; and a calculation unit calculating complex impedance. The calculation unit calculates the complex impedance based on a multiplication value X of the response signal and a first reference signal outputted in synchronization with the AC signal, and a multiplication value Y of the response signal and the second reference signal obtained by shifting the phase of the AC signal. The AC signal is a rectangular wave signal, the first reference signal is a rectangular wave signal outputted in synchronization with the AC signal, and the second reference signal is a rectangular wave signal, the phase of which is shifted so as not to be outputted overlapping with the first reference signal.
Public/Granted literature
- US20210003638A1 BATTERY MONITORING DEVICE Public/Granted day:2021-01-07
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