公开(公告)号：US20220123686A1

公开(公告)日：2022-04-21

申请号：US17565140

申请日：2021-12-29

Applicant: DENSO CORPORATION

Inventor： Mitsutaka ITO ,  Atsushi FUKAYA ,  Hisashi UMEMOTO

IPC: H02P27/08 ,  H02P29/60 ,  H01M10/48 ,  H01M10/42 ,  H01M10/46 ,  H01M10/0525 ,  H01M50/507

Abstract: An electric power conversion apparatus includes a rotating electric machine including armature windings, a first inverter connecting the armature windings with a first storage battery, a second inverter connecting the armature windings with a second storage battery, a changeover switch configured to connect or disconnect between first and second positive buses or between first and second negative buses, and an operating unit configured to perform, with the changeover switch being in an ON state, first and second energization processes alternately. In the first energization process, electric current is supplied from the first storage battery to the second storage battery via the first inverter, at least one of the armature windings and the second inverter. In the second energization process, electric current is supplied from the second storage battery to the first storage battery via the second inverter, at least one of the armature windings and the first inverter.

公开(公告)号：US20230324471A1

公开(公告)日：2023-10-12

申请号：US18335123

申请日：2023-06-14

Applicant: DENSO CORPORATION

Inventor： Hisashi UMEMOTO ,  Yuji YAMAGAMI ,  Shuhei YOSHIDA ,  Masaki UCHIYAMA

IPC: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  G01R31/389

CPC classification number: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  G01R31/389 ,  H01M2220/20

Abstract: A control device includes a diagnosis unit configured to diagnose a deterioration state of a secondary battery. The diagnosis unit includes: a resistance calculator configured to calculate a direct current resistance and a reaction resistance of impedance components based on an impedance measurement result of the secondary battery; an index value calculator configured to calculate an index value related to the direct current resistance and the reaction resistance; and a deterioration determination unit configured to compare the index value with a determination threshold based on an impedance characteristic at the time of normal deterioration of the secondary battery so as to determine whether a specific deterioration occurs due to charge and discharge of the secondary battery.

公开(公告)号：US20230090001A1

公开(公告)日：2023-03-23

申请号：US18070233

申请日：2022-11-28

Applicant: DENSO CORPORATION

Inventor： Yuji YAMAGAMI ,  Shuhei YOSHIDA ,  Hisashi UMEMOTO

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/392 ,  G01R31/3842

Abstract: A battery diagnostic system includes a superimposed current applying unit, a current value acquiring unit, a voltage value acquiring unit, an impedance calculating unit, and a diagnostic unit. The superimposed current applying unit configured to apply a superimposed current formed by superimposing a plurality of frequency components to a battery. The current value acquiring unit acquires the current value of the superimposed current applied to the battery. The voltage value acquiring unit acquires a battery voltage of the battery to which the superimposed current is applied. The impedance calculating unit calculates impedance for each of a plurality of frequency components using discrete Fourier transform from the superimposed current and the battery voltage. The diagnostic unit diagnoses the battery based on the impedance.

公开(公告)号：US20210351684A1

公开(公告)日：2021-11-11

申请号：US17385789

申请日：2021-07-26

Applicant: DENSO CORPORATION

Inventor： Shusei NISHIMURA ,  Seiji IYASU ,  Hisashi UMEMOTO ,  Atsushi FUKAYA

IPC: H02K47/04 ,  H02J7/00

Abstract: A power conversion apparatus includes: a rotating electric machine that has a winding; an inverter that has a series-connection body of an upper arm switch and a lower arm switch; and a capacitor that is connected in parallel to the series-connection body. The power conversion apparatus includes: a connection path that, in a first storage battery and a second storage battery that are connected in series, electrically connects the winding with both a negative-electrode side of the first storage battery and a positive-electrode side of the second storage battery; and a control unit that controls switching of the upper arm switch and the lower arm switch such that a current flows between the first storage battery and the second storage battery through the inverter, the winding, and the connection path.

公开(公告)号：US20250096664A1

公开(公告)日：2025-03-20

申请号：US18962280

申请日：2024-11-27

Applicant: DENSO CORPORATION

Inventor： Shusei NISHIMURA ,  Seiji IYASU ,  Hisashi UMEMOTO ,  Atsushi FUKAYA

IPC: H02K47/04 ,  H02J7/00 ,  H02J7/14

Abstract: A power conversion apparatus includes: a rotating electric machine that has a winding; an inverter that has a series-connection body of an upper arm switch and a lower arm switch; and a capacitor that is connected in parallel to the series-connection body. The power conversion apparatus includes: a connection path that, in a first storage battery and a second storage battery that are connected in series, electrically connects the winding with both a negative-electrode side of the first storage battery and a positive-electrode side of the second storage battery; and a control unit that controls switching of the upper arm switch and the lower arm switch such that a current flows between the first storage battery and the second storage battery through the inverter, the winding, and the connection path.

公开(公告)号：US20230231209A1

公开(公告)日：2023-07-20

申请号：US18074566

申请日：2022-12-05

Applicant: DENSO CORPORATION

Inventor： Yuji YAMAGAMI ,  Masaaki KITAGAWA ,  Hisashi UMEMOTO ,  Shuhei YOSHIDA

IPC: H01M10/48 ,  H01M10/46 ,  H02J7/00

CPC classification number: H01M10/48 ,  H01M10/46 ,  H02J7/00714 ,  H01M2220/20 ,  H01M2010/4292

Abstract: A secondary battery system includes a secondary battery having an electrode body impregnated with an electrolytic solution containing metal ions. The secondary battery system measures an impedance of the secondary battery. The secondary battery system detects high-rate deterioration caused by uneven concentration of the metal ions in the electrolytic solution impregnated into the electrode body.

公开(公告)号：US20150127281A1

公开(公告)日：2015-05-07

申请号：US14534259

申请日：2014-11-06

Applicant: DENSO CORPORATION

Inventor： Yoshikazu KUSANO ,  Hisashi UMEMOTO ,  Naomi AWANO ,  Manabu YAMADA

IPC: G01R31/36 ,  G06N99/00

CPC classification number: G01R31/3648 ,  G01R31/367 ,  G01R31/382 ,  G06N20/00

Abstract: A battery characteristics learning apparatus is provided for calculating learning values of circuit constants of an equivalent circuit of a rechargeable battery. The apparatus includes: (1) means for acquiring values of terminal voltage of the battery sensed by voltage-sensing means and values of current of the battery sensed by current-sensing means and storing the acquired values in time series; (2) means for determining, based on the acquired values of the current, whether there has occurred a predetermined change in the current; and (3) means for calculating, when it is determined that the predetermined change has occurred, the learning values of the circuit constants based on those values of the terminal voltage and the current which are acquired at sampling time points or during sampling periods, each of the sampling time points and the sampling periods being set according to a corresponding one of time constants defined by the circuit constants.

Abstract translation: 提供一种用于计算可再充电电池的等效电路的电路常数的学习值的电池特性学习装置。 该装置包括：（1）用于获取由电压感测装置感测的电池的端子电压的值和由电流感测装置感测的电池的电流值并且以时间序列存储所获取的值的装置; （2）用于基于所获取的电流值确定当前是否发生预定变化的装置; 和（3）用于当确定发生了预定变化时计算基于在采样时间点或采样周期期间获得的端电压和电流值的电路常数的学习值的装置，每个 的采样时间点和采样周期根据由电路常数定义的相应的一个时间常数来设置。

公开(公告)号：US20130249490A1

公开(公告)日：2013-09-26

申请号：US13846530

申请日：2013-03-18

Applicant: DENSO CORPORATION

Inventor： Hisashi UMEMOTO ,  Naomi AWANO

IPC: H02J7/00

CPC classification number: H02J7/0021 ,  G01R31/367 ,  G01R31/3828 ,  G01R31/396 ,  H02J7/0078 ,  H02J7/008

Abstract: A charge/discharge current Iij where an absolute value of a difference of an estimated value (estimated cell voltage Vije(n)) of a terminal voltage of a battery cell and a detected value (cell voltage Vij(n)) that becomes equal to or less than a prescribed value ΔVth is searched by Newton's method. The charge/discharge current Iij searched in this way is equalized in all the battery cells. A charging rate SOCij(n) of the battery cell is calculated by an integration calculation of a calculated average value Ia (n).

Abstract translation: 充电/放电电流Iij，其中电池单元的端子电压的估计值（估计电池电压Vije（n））与检测值（单元电压Vij（n））的差的绝对值等于 或小于规定值，则用牛顿法搜索DeltaVth。 以这种方式搜索的充电/放电电流Iij在所有电池单元中均衡。 通过计算的平均值Ia（n）的积分计算来计算电池单元的充电率SOCij（n）。