公开(公告)号：US11067637B2

公开(公告)日：2021-07-20

申请号：US15958723

申请日：2018-04-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada ,  Koji Umemura ,  Akemi Nakatake

IPC: H01M10/48 ,  G01R31/392 ,  H01M10/052 ,  H02J7/14 ,  H01M10/0525 ,  H01M50/20 ,  G01R31/389 ,  H02J7/00 ,  H01M10/44 ,  G01R31/374 ,  H01M10/42 ,  G01R31/367

Abstract: A control device calculates an amount of increase ΔAm in freezing temperature measurement value Am from an initial freezing temperature Δ0 and calculates an amount of lowering in capacity corresponding to the amount of increase ΔAm in freezing temperature as an amount of lowering in capacity ΔBx due to deterioration of a material. The control device calculates an amount of lowering in capacity measurement value Bm from an initial capacity B0 as a whole amount of lowering in capacity ΔBm and calculates a material deterioration ratio X by using ΔBx and ΔBm. The control device calculates a value resulting from subtraction of ΔBx from ΔBm as an amount of lowering in capacity ΔBy due to precipitation of Li and calculates an Li precipitation deterioration ratio Y by using ΔBy and ΔBm.

公开(公告)号：US10381855B2

公开(公告)日：2019-08-13

申请号：US15439171

申请日：2017-02-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada ,  Shohei Matsuoka

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44 ,  H01M10/48 ,  H01M10/42

Abstract: A secondary battery system includes a battery having an electrode body impregnated with an electrolyte containing lithium ions; and an ECU configured to permit charge and discharge of the battery when battery temperature is equal to or more than a threshold temperature and to restrict the charge and discharge of the battery when the battery temperature is less than the threshold temperature. The ECU is configured to obtain a value related to minimum concentration of the lithium ions (minimum salt concentration) caused by a deviation of concentration distribution of the lithium ions in the electrode body, and to set the threshold temperature to be higher as the related value representing the minimum salt concentration becomes lower.

公开(公告)号：US20180208062A1

公开(公告)日：2018-07-26

申请号：US15877772

申请日：2018-01-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada ,  Takanori Soejima

IPC: B60L3/00 ,  B60L11/18

CPC classification number: B60L3/0046 ,  B60L58/12 ,  B60L58/25 ,  B60L2240/36 ,  B60L2240/70 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705 ,  Y02T10/7291 ,  Y02T90/16

Abstract: A battery system is configured to be mounted on a vehicle. The battery system includes a secondary battery, a detection device, and an electronic control unit. The electronic control unit is configured to perform communication with an external device that accumulates temperature history data of other vehicle, and is configured to acquire, when the battery temperature of the temperature history data of the vehicle contains an abnormal value, the temperature history data of the other vehicle within a period in which the battery temperature of the temperature history data of the vehicle contains the abnormal value, from the external device, and execute correction of the abnormal value of the battery temperature based on the temperature history data acquired from the external device.

公开(公告)号：US11193983B2

公开(公告)日：2021-12-07

申请号：US16186670

申请日：2018-11-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takanori Soejima ,  Hiroshi Hamaguchi ,  Ryo Kanada ,  Nobuyasu Haga

IPC: G01R31/392 ,  H01M10/48 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/36 ,  B60L58/16 ,  B60L58/12 ,  B60K6/28

Abstract: The first step includes performing FFT for a voltage and a current of a battery a plurality of times to thereby calculate the voltage and the current for each frequency. The second step includes determining whether or not the first condition and the second condition are satisfied for the current of the battery that is calculated for each frequency. The third step includes calculating an impedance component of the battery for each frequency range when at least one of the first condition and the second condition is not satisfied, and not calculating the impedance component of the battery for each frequency range when each of the first condition and the second condition is satisfied. The first condition shows that the current in a low frequency range is greater than a reference value. The second condition shows that the current in a frequency range is less than a reference value.

公开(公告)号：US11189865B2

公开(公告)日：2021-11-30

申请号：US16672990

申请日：2019-11-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada ,  Hiroki Nagai

IPC: H02J7/14 ,  H01M10/44 ,  H01M10/0525 ,  G01R31/382

Abstract: A controller of a deterioration estimation device for a secondary battery is configured to acquire a first open circuit voltage when a temperature of the secondary battery is a first temperature and a second open circuit voltage when the temperature of the secondary battery is a second temperature changed from the first temperature, and estimate a degree of deterioration of the secondary battery by using a difference between first and second slopes. The first slope is a ratio of a voltage change obtained by subtracting the first open circuit voltage from the second open circuit voltage to a temperature change obtained by subtracting the first temperature from the second temperature. The second slope is a ratio of the voltage change to the temperature change when the temperature of the new secondary battery has changed from the first temperature to the second temperature.

公开(公告)号：US10663526B2

公开(公告)日：2020-05-26

申请号：US14746242

申请日：2015-06-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada

IPC: G01R31/36 ,  G01R31/3828 ,  H02J7/00 ,  H01M10/42 ,  G01R31/392 ,  G01R31/367

Abstract: A battery management terminal is for a secondary battery mounted on a device. The battery management terminal includes a second electronic control unit and an inform unit. The second electronic control unit is configured to, at the time when the secondary battery is replaced, acquire a historical information of an evaluation value of the secondary battery before replacement from the first electronic control unit. The second electronic control unit is configured to determine required characteristics required of a replacement secondary battery on the basis of the historical information of the evaluation value. The inform unit is configured to inform the required characteristics determined by the second electronic control unit.

公开(公告)号：US12113185B2

公开(公告)日：2024-10-08

申请号：US18360165

申请日：2023-07-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kanada ,  Kenji Takahashi ,  Mai Fujiwara

IPC: H01M10/48 ,  G01R31/382 ,  H01M4/133 ,  H01M4/134 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/44

CPC classification number: H01M10/48 ,  G01R31/382 ,  H01M4/133 ,  H01M4/134 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/44

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

公开(公告)号：US11428745B2

公开(公告)日：2022-08-30

申请号：US16059118

申请日：2018-08-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Nobuyasu Haga ,  Hiroshi Hamaguchi ,  Ryo Kanada ,  Takanori Soejima

IPC: G01R31/392 ,  H01M10/617 ,  H01M10/42 ,  G01R31/3842 ,  B60L58/12 ,  B60L58/13 ,  B60L3/12 ,  B60L58/21 ,  B60L58/14 ,  H01M10/625 ,  H01M10/633 ,  G01R31/367 ,  G01R31/00 ,  G01R31/374 ,  H02J7/00

Abstract: A method of estimating a deteriorated state of a battery includes steps S102 to S110. S102 is a step of obtaining a voltage and a current of the battery a plurality of times for a data acquisition period. S104 is a step of calculating an amount of change in current, an amount of change in temperature, and an amount of change in SOC during the data acquisition period. S106 is a step of obtaining an allowable amount of change in current, an allowable amount of change in temperature, and an allowable amount of change in SOC based on an average temperature. S110 is a step of calculating an impedance component for each frequency bandwidth based on the voltage and the current by subjecting the voltage and the current to Fourier transform when all amounts of change are smaller than the allowable amounts of change.

公开(公告)号：US20190162796A1

公开(公告)日：2019-05-30

申请号：US16186670

申请日：2018-11-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takanori Soejima ,  Hiroshi Hamaguchi ,  Ryo Kanada ,  Nobuyasu Haga

IPC: G01R31/392 ,  H01M10/48 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/36

Abstract: The first step includes performing FFT for a voltage and a current of a battery a plurality of times to thereby calculate the voltage and the current for each frequency. The second step includes determining whether or not the first condition and the second condition are satisfied for the current of the battery that is calculated for each frequency. The third step includes calculating an impedance component of the battery for each frequency range when at least one of the first condition and the second condition is not satisfied, and not calculating the impedance component of the battery for each frequency range when each of the first condition and the second condition is satisfied. The first condition shows that the current in a low frequency range is greater than a reference value. The second condition shows that the current in a frequency range is less than a reference value.

公开(公告)号：US20190121661A1

公开(公告)日：2019-04-25

申请号：US16161582

申请日：2018-10-16

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Ryo Kanada

IPC: G06F9/48 ,  G07C5/00 ,  G05D1/00 ,  G06F9/50

Abstract: A vehicle includes a control device including a first processing section, a second processing section, and a third processing section. The first processing section is programmed to acquire an excessive processing power of a general purpose computing device. The second processing section is programmed to cause the general purpose computing device to process a computing task stored in a first memory storage section and allow the processing result to be stored in a second memory storage section if the excessive processing power acquired by the first processing section is greater than a predetermined processing power. The third processing section is programmed to send the processing result stored in the second memory storage section to an external server by use of a communication device.