公开(公告)号：US11835588B2

公开(公告)日：2023-12-05

申请号：US16932036

申请日：2020-07-17

Applicant: DENSO CORPORATION

Inventor： Masaaki Kitagawa

IPC: G01R31/389 ,  G01R31/382 ,  G01R31/396 ,  H01M10/42 ,  H01M10/48 ,  H02J7/00

CPC classification number: G01R31/389 ,  G01R31/382 ,  G01R31/396 ,  H01M10/4235 ,  H01M10/48 ,  H02J7/0047

Abstract: A waveform designator designates a given waveform of an AC signal by specifying a frequency as a reference. A signal controller causes a storage battery to output a response signal based on its own power. A detector detects a frequency component in the response signal corresponding to the reference frequency of the AC signal based on a product of the reference frequency and the response signal. A calculator calculates a complex impedance of the storage battery based on the frequency component in the response signal. A noise determiner determines presence or absence of a noise signal corresponding to the reference frequency of the AC signal before the signal controller causes the storage battery to output the AC signal. A noise controller either avoids or removes the noise signal.

公开(公告)号：US11750002B2

公开(公告)日：2023-09-05

申请号：US16937424

申请日：2020-07-23

Applicant: DENSO CORPORATION

Inventor： Masaaki Kitagawa ,  Shun Miyauchi ,  Takumi Shimizu

IPC: H02J7/00 ,  G01R31/364 ,  G01R31/389 ,  G01R31/396 ,  H01M10/44 ,  H01M10/48

CPC classification number: H02J7/0047 ,  G01R31/364 ,  G01R31/389 ,  G01R31/396 ,  H01M10/44 ,  H01M10/48 ,  H01M2200/00

Abstract: A battery monitoring apparatus includes a circuit board, a signal control unit configured to cause a predetermined AC signal to be outputted from a storage battery through a first electrical path, a response signal input unit configured to input, through a pair of second electrical paths, a response signal of the storage battery to the AC signal, and a calculating unit configured to calculate, based on the response signal, a complex impedance of the storage battery. The first and second electrical paths are provided on a major face of the circuit board. On the circuit board, there is defined a first region which is surrounded by the first and second electrical paths and two terminals of the storage battery. The size of the first region is set to have an electromotive force, which is induced in the second electrical paths by the AC signal, be within an allowable electromotive-force range.

公开(公告)号：US11630156B2

公开(公告)日：2023-04-18

申请号：US16925437

申请日：2020-07-10

Applicant: DENSO CORPORATION

Inventor： Masakatsu Horiguchi ,  Masaaki Kitagawa

IPC: G01R31/00 ,  G01R31/36 ,  G01R31/382 ,  G01R31/389 ,  G01R31/392 ,  H01M10/48 ,  G01R27/02 ,  H02J7/00 ,  G01R31/396

Abstract: A battery monitoring apparatus includes an electric power supply terminal connected with a first electrical path, a voltage input terminal connected with a second electrical path, a signal control unit connected with a third electrical path, a response signal input terminal connected with a fourth electrical path, and a calculating unit. The signal control unit is configured to cause a predetermined AC signal to be outputted from a storage battery with the storage battery itself being an electric power source for the output of the predetermined AC signal. The calculating unit is configured to calculate, based on a response signal of the storage battery to the predetermined AC signal, a complex impedance of the storage battery. Moreover, at least one of the first to the fourth electrical paths is merged with at least one of the other electrical paths into an electrical path that is connected to the storage battery.

公开(公告)号：US10903667B2

公开(公告)日：2021-01-26

申请号：US16215388

申请日：2018-12-10

Applicant: DENSO CORPORATION

Inventor： Masaaki Kitagawa ,  Masahiko Ito ,  Masakazu Kouda ,  Isao Ishibe

IPC: G01R31/396 ,  H02J7/00 ,  G01R31/3835

Abstract: A battery control unit is adapted for a power supply system provided with a storage battery series-connected battery cells, a filter circuit, a discharge circuit, and a connection member connecting between the battery cell and the filter circuit.
The battery control unit includes a voltage detection unit detecting voltage at the battery cell where noise is eliminated by the filter circuit, the voltage being detected immediately before/after a discharging is performed through the discharge circuit; a correction value calculation unit that calculates an amount of a voltage drop at the connection member when a discharging is performed through the discharge circuit, to be a correction value; and a voltage calculation unit that calculates voltage of the battery cell by adding the correction value calculated by the correction value calculation unit to a post-discharge voltage detected immediately after the discharging by the voltage detection unit.