公开(公告)号：US20220196750A1

公开(公告)日：2022-06-23

申请号：US17693679

申请日：2022-03-14

Applicant: DENSO CORPORATION

Inventor： Yuri SANO ,  Hiroki FUJII ,  Koji OHIRA

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/3842 ,  G01R31/374

Abstract: A battery state estimation apparatus calculates a measured DC resistance value of a DC resistance based on a current change amount and a voltage change amount, which are calculated in a predetermined period using measured current value and voltage value. The battery state estimation apparatus further calculates (i) a non-temperature dependent constant and (ii) a constant of a temperature dependent function based on (i) an estimated DC resistance value and (ii) the measured DC resistance value. The estimated DC resistance value is an estimated value of the measured DC resistance value; the estimated DC resistance value is represented as a sum of (i) the non-temperature dependent constant Ra, which indicates a temperature independent component of the DC resistance of the secondary battery, and (ii) the temperature dependent function Rb, which indicates a temperature dependent component of the DC resistance of the secondary battery.

公开(公告)号：US20180267106A1

公开(公告)日：2018-09-20

申请号：US15921312

申请日：2018-03-14

Applicant: DENSO CORPORATION

Inventor： Yoshikazu KUSANO ,  Koji OHIRA ,  Naomi AWANO

IPC: G01R31/36

CPC classification number: G01R31/382

Abstract: A battery state estimating device periodically estimates a battery state of a secondary battery. The battery state estimating device has a current amount acquiring section, a threshold amount memory, a current amount comparing section, a cycle setting section, and a battery state estimating section. The current amount acquiring section acquires a current amount flowing in the secondary battery. At least one current threshold amount is stored in advance in the threshold amount memory. The current amount comparing section compares the current amount acquired by the current amount acquiring section with the current threshold amount stored in the threshold amount memory. The cycle setting section sets an estimation cycle for estimating the state of the secondary battery based on this comparison result. The battery state estimating section periodically estimates the battery state of the secondary battery based on the estimation cycle set by the cycle setting section.

公开(公告)号：US20180261889A1

公开(公告)日：2018-09-13

申请号：US15914312

申请日：2018-03-07

Applicant: DENSO CORPORATION

Inventor： Yoshikazu KUSANO ,  Koji OHIRA ,  Naomi AWANO

IPC: H01M10/42 ,  G01R31/36 ,  H01M10/48 ,  H01M10/44 ,  G01R19/165

CPC classification number: H01M10/4285 ,  G01R19/16542 ,  G01R31/3648 ,  G01R31/374 ,  G01R31/3828 ,  G01R31/3842 ,  H01M10/44 ,  H01M10/48

Abstract: A battery state estimating device estimates a battery state in a battery module having a plurality of secondary batteries. The battery state estimating device is configured to be able to change a number of targets which is a number of the secondary batteries subject to estimation of the battery state of the secondary battery based on a specific value acquired from the plurality of secondary batteries, or the battery state estimating device is configured to be able to change a calculation formula for estimating the battery state of the battery to a calculation formula with a small calculation load.

公开(公告)号：US20160315316A1

公开(公告)日：2016-10-27

申请号：US15133250

申请日：2016-04-20

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Koji OHIRA ,  Masaki UCHIYAMA ,  Daisuke SHIBATA

IPC: H01M4/36 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/485 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021

Abstract: An electrode active material for a nonaqueous electrolyte secondary battery includes: a core part including at least one of an inorganic oxide and a carbon-composite inorganic composite oxide; and a shell part for carbon coating on the core part. The electrode active material has a specific surface area of 6.0 m2/g or more. The electrode active material has a moisture content of 400 ppm or less, which is measured by a Karl Fischer method such that the electrode active material is heated in a heat-evaporating manner, and continuously maintained at 250° C. for 40 minutes without exposing to an atmosphere after the electrode active material is exposed to the atmosphere to absorb moisture to be saturated.

Abstract translation: 非水电解质二次电池用电极活性物质包括：芯部，其包含无机氧化物和碳复合无机复合氧化物中的至少一种; 以及用于在芯部上涂覆碳的外壳部分。 电极活性物质的比表面积为6.0m 2 / g以上。 电极活性物质的水分含量为400ppm以下，通过卡尔费休法测定，使得电极活性物质以热蒸发方式加热，并连续保持在250℃下40分钟而不暴露 在电极活性物质暴露于大气中以吸收水分以饱和之后的气氛。

公开(公告)号：US20200072910A1

公开(公告)日：2020-03-05

申请号：US16558605

申请日：2019-09-03

Applicant: DENSO CORPORATION

Inventor： Yoshikazu KUSANO ,  Koji OHIRA

IPC: G01R31/392 ,  G01R31/367

Abstract: A power supply system is provided with a secondary battery, a memory unit, a calculation unit and a SOC characteristics acquiring unit. The memory unit stores initial characteristics data having a relationship between the open circuit voltage and the capacity for the secondary battery before being deteriorated. The calculation unit utilizes the initial characteristics data to calculate a deteriorated characteristics data which is a relationship between the open circuit voltage and the capacity of the deteriorated secondary battery. The SOC characteristics acquiring unit acquires the relationship between the open circuit voltage and the state of charge of the deteriorated secondary battery by dividing the capacity value included in the deteriorated characteristics data by the fully charged capacity of the deteriorated secondary battery.