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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.
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公开(公告)号：US10429447B2
公开(公告)日：2019-10-01
申请号：US15956799
申请日：2018-04-19
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda , Tomoya Yamada
IPC: G01R31/3835 , H02J7/00 , G01R1/30 , G01R15/00 , G01R31/3842
Abstract: A voltage sensing device includes: a multiplexer configured to choose either two corresponding voltages at two voltage sensing target nodes or two corresponding voltages at the terminals of a shunt resistor, and output either the two corresponding voltages at the two voltage sensing target nodes or the two corresponding voltages at the terminals of the shunt resistor, which are chosen by the multiplexer, as a first output voltage and a second output voltage; a differential switched capacitor amplifier circuit including a sampling capacitor and a feedback capacitor and configured to sample the first output voltage and the second output voltage through the sampling capacitor, and output sensing voltages corresponding to the first output voltage and the second output voltage by transferring a charge stored in the sampling capacitor through the feedback capacitor; and an operation control unit configured to control the multiplexer and the differential switched capacitor amplifier circuit.
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公开(公告)号：US09958505B2
公开(公告)日：2018-05-01
申请号：US15432998
申请日：2017-02-15
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda
CPC classification number: G01R31/362 , G01R19/0084 , G01R27/08 , G01R31/36 , G01R31/3644 , H02J7/0021 , H02J7/0068
Abstract: A voltage sensing circuit includes a difference voltage sensing circuit and a leakage cancelling circuit. The difference voltage sensing circuit includes two sensing capacitors, a first sensing switch, a second sensing switch, and a third sensing switch. A first group including the first sensing switch and the second sensing switch and a second group including the third sensing switch are complementally turned on and turned off. The leakage cancelling circuit includes two compensation capacitors, a first compensation switch, a second compensation switch, and a third compensation switch. A third group including the first compensation switch and the second compensation switch and a fourth group including the third compensation switch are complementally turned on and turned off.
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公开(公告)号：US20190146011A1
公开(公告)日：2019-05-16
申请号：US16019688
申请日：2018-06-27
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda
Abstract: A voltage detection device comprises a voltage detection circuit, which is a fully-differential type and a control circuit for controlling an operation of the voltage detection circuit. The voltage detection circuit includes a switched capacitor circuit, a differential amplifier, a common mode feedback circuit for controlling a common mode level of an output voltage of the differential amplifier and a bias circuit for supplying biases to the differential amplifier and the common mode feedback circuit. The control circuit controls the voltage detection circuit to execute intermittently a detection operation for detecting the voltage. The control circuit controls the voltage detection circuit to execute a pseudo operation of an execution period, which is shorter than that of the detection operation, during a transition period from a stop state, in which no detection operation is executed, to the operation state, in which the detection operation is executed.
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公开(公告)号：US08890565B2
公开(公告)日：2014-11-18
申请号：US13761533
申请日：2013-02-07
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda , Tetsuya Makihara
IPC: H03K19/0175 , H03K19/00 , H04L25/02 , H03K19/0185
CPC classification number: H03K19/017545 , H01L2224/48137 , H01L2924/13091 , H03K19/018521 , H01L2924/00
Abstract: A logic signal transmission circuit includes a driving circuit, an isolation section, and a latch section. The driving circuit converts an input digital signal to a differential digital signal. The isolation section blocks direct current and passes the differential digital signal. The latch section has even numbers of inverters which are connected in a loop and output a logic signal by turning ON and OFF a power supply voltage in a complementary manner. An input impedance of the latch section is set so that when a logic level of the differential digital signal changes, a transient voltage inputted through the isolation section to the latch section changes across a threshold voltage of the latch section. When the transient voltage changes across the threshold voltage, a logic level of the logic signal changes.
Abstract translation: 逻辑信号传输电路包括驱动电路，隔离部分和锁存部分。 驱动电路将输入数字信号转换为差分数字信号。 隔离部分阻止直流电流并传递差分数字信号。 闩锁部分具有偶数个反相器，其以循环方式连接并通过互补的方式接通和断开电源电压来输出逻辑信号。 锁存部分的输入阻抗被设定为当差分数字信号的逻辑电平改变时，通过隔离部分输入到锁存部分的瞬态电压在锁存部分的阈值电压上变化。 当瞬态电压在阈值电压上变化时，逻辑信号的逻辑电平发生变化。
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Patent Agency Ranking
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.
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公开(公告)号：US11181937B2
公开(公告)日：2021-11-23
申请号：US16922161
申请日：2020-07-07
Applicant: DENSO CORPORATION
Inventor： Yukihiro Tomonaga , Kazutaka Honda
Abstract: A correction current output circuit comprises a first voltage dividing circuit for generating a voltage in which an output voltage from a bandgap reference voltage circuit is divided in multiple stages, first and second correction circuits connected between a power supply and a ground, and a second voltage dividing circuit for dividing the above voltage in multiple stages in a path in which a positive temperature characteristic voltage is generated with the band gap reference voltage circuit. Current output terminals of a the second transistor of the first correction circuit and a first transistor of the second correction circuit are connected to a common connection point, and a current for correcting the temperature characteristic of a reference voltage generation circuit is output from the common connection point.
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公开(公告)号：US10250206B2
公开(公告)日：2019-04-02
申请号：US15730918
申请日：2017-10-12
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda
Abstract: A voltage detection circuit includes two detection capacitors, which are paired and configured differentially, first to third detection switches, a drive part, a minimum selector and a maximum selector. The first detection switch is formed of a pMOS transistor, which opens and closes a path between one of the detection capacitors and an input node. The second detection switch is formed of an nMOS transistor, which opens and closes a path between the other of the detection capacitors and an input node. The third detection switch is formed of a series circuit of a pMOS transistor and an nMOS transistor, which open and close a path between two detection capacitors. The driving part turns on and off complementarily between the first and second switches and the third detection switch. The minimum selector applies a lower one of voltages of the input nodes as a substrate potential of the nMOS transistor. The maximum selector applies a higher one of the voltages of the input nodes as a substrate potential of the pMOS transistor.
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公开(公告)号：US10156613B2
公开(公告)日：2018-12-18
申请号：US15278306
申请日：2016-09-28
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda , Tomohiro Nezuka
IPC: G01R31/36
Abstract: An A/D conversion device acquires an inter-terminal signal of one or more battery cells when detecting a voltage across the battery cells. The A/D conversion device acquires a failure diagnosis signal during a failure diagnosis. A control unit causes the A/D conversion device to perform A/D conversion processing in a ΔΣ mode or a hybrid mode, in which acquiring remaining bits of higher bits after subjecting the higher bits to a ΔΣ type A/D conversion processing, when detecting the inter-terminal signal of the battery cells. The control unit causes the A/D conversion device to perform the A/D conversion processing in a cyclic mode or a hybrid mode, when detecting the failure diagnosis signal during the failure diagnosis.
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公开(公告)号：US10094883B2
公开(公告)日：2018-10-09
申请号：US15378271
申请日：2016-12-14
Applicant: DENSO CORPORATION
Inventor： Shunya Yamamoto , Kazutaka Honda , Yukihiro Tomonaga , Ryotaro Miura
Abstract: A voltage detecting device detects a differential voltage between two input nodes having a non-zero common mode voltage. A differential voltage detecting circuit 5 detects the differential voltage by sampling each voltage of the input nodes and outputs a detection voltage indicating a detection result. A leak canceling circuit generates a compensating current, which flows in opposition to a leak current flowing out from the input nodes in correspondence to an operation of the differential voltage detecting circuit. An operation control part controls the leak canceling circuit to perform or stop a canceling operation. A failure diagnosing part performs a failure diagnosis about the leak canceling circuit based on a first detection value and a second detection value of the detection voltages, which are detected during periods when the leak canceling circuit performs and stops the canceling operation.
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