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公开(公告)号：US20230402865A1
公开(公告)日：2023-12-14
申请号：US18457113
申请日：2023-08-28
发明人： Tsutomu SAKAKIBARA , Naohisa HATANI , Hitoshi KOBAYASHI , Jiro MIYAKE , Ken MARUYAMA , Toshinobu NAGASAWA , Toshiaki OZEKI , Goro MORI
IPC分类号： H02J7/00 , G01R31/3835 , G01R31/396 , H01M10/42 , H01M10/48
CPC分类号： H02J7/00712 , H02J7/0047 , H02J7/0013 , H02J7/00032 , G01R31/3835 , G01R31/396 , H01M10/425 , H01M10/482 , H02J2207/20 , H01M2010/4271 , H01M2010/4278
摘要： A cell stack management system includes a cell monitoring unit that measures an output voltage of a plurality of power storage cells, a battery management unit that manages a cell stack, and a first communication network that connects the cell monitoring unit and the battery management unit. The battery management unit includes: a first communication circuit connected to the first communication network; a second communication circuit connected to a second communication network for connecting to a higher-level system; a control circuit that controls the battery management unit; and a control circuit power supply. The cell stack management system includes a normal mode and a low-power mode as modes of operation. During transition from the low-power mode to the normal mode, the first communication circuit activates at least one of the control circuit power supply, the control circuit, or the second communication circuit.
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公开(公告)号：US20220190622A1
公开(公告)日：2022-06-16
申请号：US17683932
申请日：2022-03-01
发明人： Hitoshi KOBAYASHI
IPC分类号： H02J7/00
摘要： A power storage system includes: a power storage device including a cell stack including power storage cells connected in series; and a charging device that supplies a charging current to the power storage device. The power storage system further includes: an alternating current excitating circuit in the power storage device or the charging device that excitates the charging current using an alternating current; a complex impedance measuring unit in the power storage device that measures a current value of the alternating current used to excitate the charging current and a voltage value of each of the power storage cells, and measures a complex impedance of each of the power storage cells from the measured current and voltage values; and a charging control unit in the power storage device or the charging device that controls the charging current based on the complex impedance.
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公开(公告)号：US20210109162A1
公开(公告)日：2021-04-15
申请号：US17132225
申请日：2020-12-23
发明人： Kazuo MATSUKAWA , Yu OKADA , Yosuke GOTO , Hitoshi KOBAYASHI , Keiichi FUJII
IPC分类号： G01R31/3842 , G01R31/389 , H01M10/48 , H01M50/569
摘要： A battery monitoring device includes: a pair of terminals for measuring voltage or current of a battery, and to which a filter unit including a capacitive element is connected; an AD converter that measures a waveform of voltage between the terminals during charging or discharging of the capacitive element; and a time constant calculation unit that calculates a time constant of the filter unit based on the waveform measured. The AD converter is, for example, a first AD converter or a second AD converter. The filter unit is, for example, a first filter unit or a second filter unit.
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公开(公告)号：US20240110992A1
公开(公告)日：2024-04-04
申请号：US18526679
申请日：2023-12-01
发明人： Akira KAWABE , Hitoshi KOBAYASHI , Keiichi FUJII
IPC分类号： G01R31/389 , G01R31/367 , H01M10/42
CPC分类号： G01R31/389 , G01R31/367 , H01M10/4285
摘要： A battery anomaly detection device includes: an alternating-current (AC) impedance measurer that measures AC impedance of a battery cell; and an anomaly determiner that determines whether the AC impedance is within a reference range, and when the AC impedance is not within the reference range, determines that the battery cell is an anomalous cell.
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5.发明公开公开(公告)号：US20240094303A1
公开(公告)日：2024-03-21
申请号：US18524902
申请日：2023-11-30
IPC分类号： G01R31/392 , G01R31/367 , G01R31/382 , G01R31/389
CPC分类号： G01R31/392 , G01R31/367 , G01R31/382 , G01R31/389
摘要： A battery state estimation device includes: a first state of charge (SOC) calculator that calculates a first SOC using a first method that uses the battery model parameter of a battery; a second SOC calculator that calculates a second SOC using a second method different from the first method; an alternating-current (AC) impedance measurement unit that measures the AC impedance of the battery when the error between the first SOC and the second SOC is greater than a predetermined threshold; and a battery model parameter calculator that calculates a battery model parameter using the measured AC impedance. The first SOC calculator recalculates the first SOC using the battery model parameter calculated.
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公开(公告)号：US20210184474A1
公开(公告)日：2021-06-17
申请号：US17185456
申请日：2021-02-25
发明人： Hitoshi KOBAYASHI
IPC分类号： H02J7/00 , G01R31/396 , G01R31/3835
摘要： A cell supervising circuit includes: a measurement circuit which measures a state of charge of a secondary battery cell; a transformer which is provided for the measurement circuit to contactlessly receive power supply from a power source different from the secondary battery cell; and a communication circuit which transmits, via the transformer to a BMU which manages a status of a battery pack, the state of charge measured by the measurement circuit.
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公开(公告)号：US20240128981A1
公开(公告)日：2024-04-18
申请号：US18392528
申请日：2023-12-21
发明人： Hitoshi KOBAYASHI
IPC分类号： H03M1/18
CPC分类号： H03M1/188 , G01R19/0092
摘要： An analog-to-digital conversion circuit includes: a first variable gain amplifier connected to an input terminal; a first AD converter connected to the first variable gain amplifier; a second variable gain amplifier connected to the input terminal; a second AD converter connected to the second variable gain amplifier; a selection circuit to which an output of the first AD converter and an output of the second AD converter are input, and which selects one of the outputs; and a control circuit that controls a gain change period of the first variable gain amplifier and a gain change period of the second variable gain amplifier in a relative manner.
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公开(公告)号：US20240007128A1
公开(公告)日：2024-01-04
申请号：US18467501
申请日：2023-09-14
发明人： Hitoshi KOBAYASHI
IPC分类号： H03M3/00
摘要： An analog-to-digital conversion circuit includes: a variable gain amplifier; a delta-sigma modulator that modulates an output of the variable gain amplifier to a pulse density modulation (PDM) signal; and a decimation filter that downsamples the PDM signal to output a first digital signal that is converted into a multi-bit digital signal. The decimation filter includes: a weight change unit that converts the PDM signal into a second digital signal that is weighted by multiplying a weight of the PDM signal by a reciprocal of an amplification factor of the variable gain amplifier; and a first digital filter that receives the second digital signal as an input, and outputs the first digital signal.
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公开(公告)号：US20220120817A1
公开(公告)日：2022-04-21
申请号：US17558366
申请日：2021-12-21
发明人： Yu OKADA , Hitoshi KOBAYASHI , Keiichi FUJII
IPC分类号： G01R31/389 , B60R16/03 , H02J7/00 , G01R31/3842 , B60L58/10
摘要： A battery management circuit includes: a reference signal generator that generates a first reference frequency signal and a second reference frequency signal having a phase different from a phase of the first reference frequency signal; an alternating-current superimposer that superimposes an alternating current on the secondary battery, the alternating current having a frequency component of the first reference frequency signal; a voltage measurer that measures a voltage of the secondary battery by performing sampling using a frequency; a current measurer that measures a current of the secondary battery by performing sampling using a frequency; and a converter that converts each of results of measurements by the voltage measurer and the current measurer into a complex voltage and a complex current, by multiplying the result of the measurement by the first reference frequency signal and the second reference frequency signal.
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公开(公告)号：US20210313815A1
公开(公告)日：2021-10-07
申请号：US17349437
申请日：2021-06-16
发明人： Hitoshi KOBAYASHI
IPC分类号： H02J7/00 , G01R31/396
摘要： A battery control system is provided with battery monitoring control circuits for measuring an output voltage of an individual or secondary battery cells, which are connected in an assembled battery divided into blocks; and a control circuit for controlling the battery monitoring control circuits. Each of the batter monitoring control circuits includes a communication interface for communications between the battery monitoring control circuits or communications with the control circuit; a power converter for converting a start-up signal into a DC voltage; and a start-up circuit that receives the DC voltage and generates a start-up control signal for starting the battery monitoring control circuit. The communication interface is a daisy-chain communication interface that connects the plurality of battery monitoring control circuits in a daisy chain, and one of the plurality of battery monitoring control circuits starts another one of the plurality of battery monitoring control circuits based on the start-up signal.
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