公开(公告)号：US12270862B2

公开(公告)日：2025-04-08

申请号：US18153450

申请日：2023-01-12

Applicant: DENSO CORPORATION

Inventor： Yoshikazu Furuta ,  Soya Taniguchi ,  Tomohiro Nezuka ,  Kazutaka Honda

IPC: G01R31/396 ,  G01R31/367 ,  G01R31/3842 ,  G01R31/389

Abstract: A battery monitor system includes: a reference signal generation unit; an excitation signal generation unit; a current generation unit for an excitation current; a current measurement unit for the excitation current; a voltage measurement unit for a voltage of each battery cell; an impedance measurement unit for an impedance of each battery cell; a noise measurement unit for a noise voltage; and a control unit. The control unit selects one or more battery cells not a measurement target, and the noise measurement unit measures the noise voltage near a measurement frequency equal to a frequency of an orthogonal reference signal while operating the voltage measurement unit without operating the current generation unit.

公开(公告)号：US11892514B2

公开(公告)日：2024-02-06

申请号：US17462133

申请日：2021-08-31

Applicant: DENSO CORPORATION

Inventor： Soya Taniguchi ,  Yoshikazu Furuta ,  Takeshi Kondo ,  Kazutaka Honda

IPC: G01R31/3842 ,  G01R31/389 ,  G01R31/396

CPC classification number: G01R31/3842 ,  G01R31/389 ,  G01R31/396

Abstract: An assembled battery monitoring device in the present disclosure includes: an excitation signal processor generates a excitation signal by processing an in-phase signal of an orthogonal reference signal generated by a signal generator; a current exciter generates an excitation current based on the excitation signal according to voltage signals, and energizes a battery cell; and an impedance measurer measures an AC impedance of the battery cell based on the excitation current measured by the current measurer and a voltage of the battery cell measured by the voltage measurer.