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公开(公告)号：US10923774B2
公开(公告)日：2021-02-16
申请号：US15914312
申请日：2018-03-07
Applicant: DENSO CORPORATION
Inventor： Yoshikazu Kusano , Koji Ohira , Naomi Awano
IPC: H01M10/44 , H01M10/48 , H01M10/42 , G01R31/36 , G01R19/165 , G01R31/3828 , G01R31/3842 , G01R31/374
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.
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公开(公告)号：US11047917B2
公开(公告)日：2021-06-29
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.
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公开(公告)号：US10439209B2
公开(公告)日：2019-10-08
申请号：US14994247
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Koji Ohira , Daisuke Shibata , Shuhei Yoshida , Keita Takahashi
Abstract: An electrode includes an electrode material, which includes: a core part made of an active substance having a polyanion structure having Mn; and a shell part obtained by covering a surface of the core part with carbon. In addition, an amount of water, as measured by Karl Fischer's method when the electrode is held at 250° C. for 40 minutes after adsorbed water is volatilized by heating, is 1500 ppm or less.
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Patent Agency Ranking
公开(公告)号：US20160211515A1
公开(公告)日：2016-07-21
申请号：US14994247
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Koji Ohira , Daisuke Shibata , Shuhei Yoshida , Keita Takahashi
IPC: H01M4/36 , H01M4/587 , H01M10/0525 , H01M4/58
CPC classification number: H01M4/366 , H01M4/136 , H01M4/525 , H01M4/5825 , H01M4/625 , H01M10/0525
Abstract: An electrode includes an electrode material, which includes: a core part made of an active substance having a polyanion structure having Mn; and a shell part obtained by covering a surface of the core part with carbon. In addition, an amount of water, as measured by Karl Fischer's method when the electrode is held at 250° C. for 40 minutes after adsorbed water is volatilized by heating, is 1500 ppm or less.
Abstract translation: 电极包括电极材料，其包括：由具有Mn的聚阴离子结构的活性物质制成的芯部; 以及通过用碳覆盖芯部的表面而获得的壳部。 此外，当电极在吸附水后在250℃下保持40分钟时，通过卡尔·费休法测量的水量通过加热而挥发为1500ppm或更少。
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公开(公告)号：US09882406B2
公开(公告)日：2018-01-30
申请号：US14828727
申请日：2015-08-18
Applicant: DENSO CORPORATION
Inventor： Yoshinori Satou , Masaki Uchiyama , Nobuo Yamamoto , Koji Ohira
CPC classification number: H02J7/007 , H01M10/0525 , H01M10/44 , H01M10/46
Abstract: A lithium-ion battery includes a cathode active material of the Olivine-type crystal structure. The lithium-ion battery is charged under control of a charging control apparatus, which performs a charging process for charging up to a target voltage according to a constant-current and constant-voltage charging method, a negative-electrode potential evaluation process for evaluating a potential change quantity at the negative-electrode, and a voltage setting process for setting the target voltage to a lower voltage based on the potential change quantity of the negative-electrode evaluated by the negative-electrode potential evaluation process. The charging voltage is changed from the target voltage to the set voltage even when the negative-electrode potential changes with an increase in the number of charging and aging deterioration. Thus a positive-electrode potential is suppressed from rising because of less susceptibility to the increase in number of charging and aging deterioration.
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公开(公告)号：US11860235B2
公开(公告)日：2024-01-02
申请号：US17693679
申请日：2022-03-14
Applicant: DENSO CORPORATION
Inventor： Yuri Sano , Hiroki Fujii , Koji Ohira
IPC: G01R31/389 , G01R31/3842 , G01R31/374 , G01R31/36
CPC classification number: G01R31/389 , G01R31/3648 , G01R31/374 , G01R31/3842
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.
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公开(公告)号：US10901040B2
公开(公告)日：2021-01-26
申请号：US15921312
申请日：2018-03-14
Applicant: DENSO CORPORATION
Inventor： Yoshikazu Kusano , Koji Ohira , Naomi Awano
IPC: 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.
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公开(公告)号：US10553859B2
公开(公告)日：2020-02-04
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 , H01M4/48 , H01M4/485 , H01M4/505 , H01M4/52 , H01M4/525 , H01M4/54 , H01M4/56 , H01M4/57 , H01M4/62 , H01M10/0525
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.
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