公开(公告)号：US20210242876A1

公开(公告)日：2021-08-05

申请号：US17238748

申请日：2021-04-23

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA

IPC: H03M1/08

Abstract: A fluctuation suppression circuit suppresses fluctuation of a reference voltage supplied to a switched capacitor circuit having a differential configuration. The switched capacitor circuit includes an input capacitor for charging an input voltage and a reference capacitor for charging the reference voltage. The input capacitor and the reference capacitor are separately disposed. The fluctuation suppression circuit includes an electric charge supply circuit. The electric charge supply circuit generates an offset electric charge by adopting a predetermined offset voltage, for offsetting a charged or discharged electric charge generated in the switched capacitor circuit, and supplies the offset electric charge to two reference input nodes, which are supplied with the reference voltage, in the switched capacitor circuit.

公开(公告)号：US20200333821A1

公开(公告)日：2020-10-22

申请号：US16922161

申请日：2020-07-07

Applicant: DENSO CORPORATION

Inventor： Yukihiro TOMONAGA ,  Kazutaka HONDA

IPC: G05F3/30 ,  G05F3/26 ,  G05F1/567 ,  G05F1/46

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.

公开(公告)号：US20170261562A1

公开(公告)日：2017-09-14

申请号：US15278306

申请日：2016-09-28

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA ,  Tomohiro NEZUKA

IPC: G01R31/36

CPC classification number: G01R31/3648 ,  G01R19/2509 ,  G01R31/362 ,  G01R31/3658 ,  G01R35/00

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.

公开(公告)号：US20150054519A1

公开(公告)日：2015-02-26

申请号：US14445383

申请日：2014-07-29

Applicant: DENSO CORPORATION

Inventor： Yukihiro TOMONAGA ,  Tetsuya MAKIHARA ,  Kazutaka HONDA ,  Nobuyoshi OSAMURA ,  Ryotaro MIURA

IPC: G01R31/36

CPC classification number: G01R31/3658 ,  G01R31/362

Abstract: A route switching circuit includes: a pair of normal detection routes that output voltages of a positive side connection point and a negative side connection point, which are different from each other, in multiple batteries for constituting an assembled battery; and a pair of diagnosis detection routes that output the voltages of the positive side connection point and the negative side connection point, and confirm a connection state of the normal detection routes by using the normal detection routes, which output at least one of a voltage of a positive side battery connected to a positive side from the positive side connection point and a voltage of a negative side battery connected to a negative side from the negative side connection point.

Abstract translation: 路线切换电路包括：在用于构成组电池的多个电池中输出彼此不同的正侧连接点和负侧连接点的电压的一对正常检测路线; 以及一对诊断检测路径，其输出正侧连接点和负侧连接点的电压，并且通过使用正常检测路径来确认正常检测路径的连接状态，该正常检测路径输出以下中的至少一个： 从正侧连接点与正极侧连接的正极侧电池和从负极侧连接点与负极侧连接的负极侧电池的电压。

公开(公告)号：US20180131337A1

公开(公告)日：2018-05-10

申请号：US15730918

申请日：2017-10-12

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA

IPC: H03F3/45 ,  G01R19/04 ,  H03K5/08 ,  H03K17/00 ,  G01R19/00 ,  G01R1/20

CPC classification number: H03F3/45179 ,  G01R1/20 ,  G01R19/0053 ,  G01R19/0084 ,  G01R19/04 ,  G01R19/16519 ,  H03F3/45475 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03K5/08 ,  H03K17/002

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.

公开(公告)号：US20170322261A1

公开(公告)日：2017-11-09

申请号：US15378271

申请日：2016-12-14

Applicant: DENSO CORPORATION

Inventor： Shunya YAMAMOTO ,  Kazutaka HONDA ,  Yukihiro TOMONAGA ,  Ryotaro MIURA

IPC: G01R31/36

CPC classification number: G01R31/3658 ,  G01R11/465 ,  G01R13/38 ,  G01R22/00 ,  G01R23/005 ,  H01Q1/2233

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.

公开(公告)号：US20210075438A1

公开(公告)日：2021-03-11

申请号：US16937804

申请日：2020-07-24

Applicant: DENSO CORPORATION

Inventor： Kunihiko NAKAMURA ,  Tomohiro NEZUKA ,  Kazutaka HONDA

IPC: H03M3/00 ,  H03M1/14

Abstract: An A/D conversion device, which operates in one mode including at least one of a ΔΣ mode, a cyclic mode, and a hybrid mode, includes: a first block that processes an analog input signal by a first amplifier; a second block including a second amplifier; a quantization unit that quantizes one of outputs of the first and second blocks; and a control circuit that switches the mode to perform a control corresponding to the mode.

公开(公告)号：US20150153422A1

公开(公告)日：2015-06-04

申请号：US14553018

申请日：2014-11-25

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA ,  Tetsuya MAKIHARA ,  Shogo HIKOSAKA

IPC: G01R31/36

CPC classification number: G01R31/3658 ,  G01R19/16542

Abstract: A first part circuit and an operational amplifier form a level shift circuit, which selects either one of battery cells forming an assembled battery and extracts and holds a voltage representing an inter-terminal voltage of a selected battery cell. A second part circuit and the operational amplifier form a residual voltage generation circuit, which generates a residual voltage by amplifying a differential voltage between a conversion subject voltage and an analog voltage corresponding to a conversion result of an A/D conversion circuit and applies the residual voltage to the A/D conversion circuit as a conversion subject voltage. A switchover circuit operates the operational amplifier as either one of the level shift circuit and the residual voltage generation circuit and switches over a connection-state to apply a voltage held by the level shift circuit to the A/D conversion circuit and the residual voltage generation circuit as a conversion subject voltage.

Abstract translation: 第一部分电路和运算放大器形成电平移位电路，其选择形成组电池的电池单元中的任一个，并提取并保持表示所选择的电池单元的端子间电压的电压。 第二部分电路和运算放大器形成残余电压产生电路，其通过放大与转换对象电压和对应于A / D转换电路的转换结果的模拟电压之间的差分电压来产生残留电压，并且将剩余电压 作为转换对象电压的A / D转换电路的电压。 切换电路将运算放大器作为电平移位电路和剩余电压产生电路中的任一个进行操作，并切换连接状态，将由电平移位电路保持的电压施加到A / D转换电路和剩余电压产生 电路作为转换主体电压。

公开(公告)号：US20140176148A1

公开(公告)日：2014-06-26

申请号：US14132197

申请日：2013-12-18

Applicant: DENSO CORPORATION

Inventor： Tetsuya MAKIHARA ,  Kazutaka HONDA ,  Kazunori NAGAYA

IPC: G01R31/36

CPC classification number: G01R31/3658 ,  B60L11/1851 ,  B60L11/1853 ,  B60L2240/547 ,  G01R31/3637 ,  H02J7/0013 ,  H02J7/0019 ,  H02J7/0021 ,  Y02T10/7005 ,  Y02T10/7055

Abstract: In a voltage detecting device, a control unit turns on first switches and fifth switches corresponding to a plurality of unit batteries of an assembled battery to charge electric charge to first capacitors. The control unit simultaneously turns off at least one of the first switches or the fifth switches to hold the electric charge in the first capacitors. While selecting one of the unit batteries in a predetermined order as a target unit battery for voltage detection, the control unit temporarily turns off a fourth switch to reset electric charge of a second capacitor, and then turns of second switches and third switches in a state where one of the first switches and one of the fifth switches corresponding to the target unit battery are kept in an off state, thereby to detect a voltage of the target unit battery.

Abstract translation: 在电压检测装置中，控制单元接通与组电池的多个单位电池相对应的第一开关和第五开关，以向第一电容器充电电荷。 控制单元同时关闭第一开关或第五开关中的至少一个以将电荷保持在第一电容器中。 当以预定顺序选择单元电池之一作为用于电压检测的目标单元电池时，控制单元暂时关闭第四开关以复位第二电容器的电荷，然后在第二开关和第三开关处于一状态 其中第一开关中的一个和对应于目标单元电池的第五开关中的一个保持在关闭状态，从而检测目标单元电池的电压。

公开(公告)号：US20220283244A1

公开(公告)日：2022-09-08

申请号：US17825649

申请日：2022-05-26

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA ,  Akira KAWAMOTO ,  Tatsuki HYODOU

IPC: G01R31/396 ,  H02J7/00 ,  G01R31/3835 ,  H01M10/48 ,  H01M10/44 ,  H01M10/42

Abstract: A battery monitoring device includes multiple A/D converters, a digital filter, an anti-alias filter, and a detection controller. The multiple A/D converters are provided in correspondence with multiple battery cells in an assemble battery. Each of the A/D converters is configured to receive an input voltage according to a voltage of corresponding one of the battery cells. The digital filter is configured to receive a digital signal output from each of the A/D converters and function as a low-pass filter. The anti-alias filter is configured to suppress aliasing by the digital filter. The detection controller is configured to control operation of the A/D converters so that the input voltage input to each of the A/D converters is A/D converted at a same timing, and detect the voltage of each of the battery cells based on an output signal of the digital filter.