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公开(公告)号：US20230077974A1
公开(公告)日：2023-03-16
申请号：US17796229
申请日：2020-12-01
Inventor： Kenji Matsubara , Masanobu Takeuchi
Abstract: A negative electrode active material for aqueous secondary batteries, said negative electrode active material being applied to an aqueous secondary battery that uses an aqueous electrolyte solution containing water and a lithium salt, wherein: the negative electrode active material contains graphite; the graphite has a C—F bond group on the surface; if I688eV is the peak intensity at around 688 eV ascribed to a C—F bond and I284eV is the peak intensity at around 284 eV ascribed to a C—C bond in the XPS spectrum of the graphite as obtained by X-ray photoelectron spectroscopy, the ratio of the peak intensity I688eV to the peak intensity I284eV (namely, the value of I688eV/I284eV ) is from 0.1 to 7; and the BET specific surface area is from 0.5 m2/g to 3.9 m2/g.
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公开(公告)号：US20220393170A1
公开(公告)日：2022-12-08
申请号：US17763102
申请日：2020-07-28
Inventor： Kazuhiro Iida , Masanobu Takeuchi
IPC: H01M4/587 , H01M10/0525 , H01M4/133
Abstract: This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte. The electrolyte contains a solvent containing water, and a lithium salt. The negative electrode has a negative electrode active material that contains a carbon material. In the carbon material, the peak intensity ratio (D/G value) of a D band and a G band in the Raman spectrum obtained using Raman spectroscopy is 0.9 to 1.5. A coating is formed on the surface of the carbon material. In the coating, in the XPS spectrum measured using X-ray photoelectron spectroscopy, when the peak intensity of a 1s electron orbit of an F atom for which the binding energy appears near 685 eV is P1, and the peak intensity of the 1s electron orbit of an O atom for which the binding energy appears near 532 eV is P2, the ratio of the peak intensity P1 to the peak intensity P2 (P1/P2 value) is 0.6 to 3.0.
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公开(公告)号：US20220393169A1
公开(公告)日：2022-12-08
申请号：US17763053
申请日：2020-07-28
Inventor： Kazuhiro Iida , Masanobu Takeuchi
IPC: H01M4/587
Abstract: This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte solution. The electrolyte solution includes a solvent containing water as a main component, and a lithium salt. The negative electrode has a negative electrode active material that includes a carbon material. The Raman spectrum of the carbon material, which is obtained by Raman spectroscopy, indicates that the peak intensity ratio between the D-band and the G-band (D/G) is 0.3 or greater. This secondary battery can suppress the reductive decomposition of the water-based electrolyte solution.
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公开(公告)号：US20190027776A1
公开(公告)日：2019-01-24
申请号：US16141081
申请日：2018-09-25
Inventor： Yuta Kuroda , Masanobu Takeuchi
Abstract: A battery module includes multiple cells that are connected in parallel to each other and a positive-side lead plate electrically connected to a positive electrode of each cell. The battery module further includes a potential difference detection unit that detects three potential differences between two points of three points on the positive-side lead plate and a microcomputer that determines an abnormality of one cell based on a signal indicating the three potential differences between two points from the potential difference detection unit.
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公开(公告)号：US20250070345A1
公开(公告)日：2025-02-27
申请号：US18722053
申请日：2022-12-20
Inventor： Yasufumi Takahashi , Masanobu Takeuchi
IPC: H01M50/193 , H01M4/02 , H01M4/06 , H01M4/24 , H01M6/06 , H01M50/107
Abstract: An alkaline dry battery includes: a bottomed cylindrical case; a hollow cylindrical positive electrode inscribed in the case; a negative electrode filled in a hollow part of the positive electrode and including a negative electrode active material containing zinc; a separator disposed between the positive and negative electrodes; an alkaline electrolytic solution; and a sealing unit. The alkaline electrolytic solution is contained in the positive and negative electrodes, and the separator. The sealing unit covers an opening of the case and includes a negative electrode current collector, a portion of the negative electrode current collector being inserted into the negative electrode. An additive is packed in a gap between the negative electrode and the sealing unit. The additive includes a wax component having a melting point of 60° C. or more and 110° C. or less. The wax component being an aliphatic hydrocarbon compound and/or an ester compound.
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Patent Agency Ranking
公开(公告)号：US10895605B2
公开(公告)日：2021-01-19
申请号：US16141118
申请日：2018-09-25
Inventor： Yuta Kuroda , Masanobu Takeuchi
IPC: G01R31/392 , H01M10/48 , G01R31/3842 , H02J7/00 , H01M10/44 , G01R31/36 , H01M10/0525
Abstract: A life estimation apparatus includes a second calculation unit that calculates a remaining capacity, which is a capacity with which the lithium ion secondary cell is capable of being charged or which the lithium ion secondary cell is capable of discharging, based on Equation 1 having an exponent n1 of 0.9 to 1.1 and Equation 2 having an exponent n2 of 0.4 to 0.6. The second calculation unit calculates the remaining capacity using Equation 1 if the amount of change of open circuit voltage, the amount of change of a voltage rise width, or the amount of change of a voltage rise rate has a positive value and calculates the remaining capacity using Equation 2 if the amount of change of the open circuit voltage, the amount of change of the voltage rise width, or the amount of change of the voltage rise rate has a negative value.
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公开(公告)号：US20190027752A1
公开(公告)日：2019-01-24
申请号：US16141272
申请日：2018-09-25
Inventor： Ryo Kazama , Masanobu Takeuchi , Tomoki Tsuji , Manabu Takijiri
Abstract: This non-aqueous electrolyte secondary battery is equipped with a positive electrode comprising: a positive electrode active substance containing a lithium-containing transition metal oxide; and a lithium compound derived from an irreversible substance irreversibly reacting with lithium at a voltage lower than the average operating voltage of the positive electrode active substance.
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公开(公告)号：US20220376249A1
公开(公告)日：2022-11-24
申请号：US17763074
申请日：2020-07-28
Inventor： Kazuhiro Iida , Masanobu Takeuchi
IPC: H01M4/587 , H01M10/0525 , H01M10/0569
Abstract: A secondary battery according to the present invention comprises a positive electrode, a negative electrode and an electrolyte solution; the electrolyte solution contains a lithium salt and a solvent containing water; the negative electrode comprises a negative electrode active material that contains a carbon material; with respect to the carbon material, the peak intensity ratio (D/G value) of the D band to the G band in a Raman spectrum as obtained by Raman spectroscopy is from 0.05 to 0.7; a coating film is formed on the surface of the carbon material; and with respect to the coating film, if P1 is the peak intensity of the 1s electron orbital of an F atom at around the binding energy of 685 eV and P2 is the peak intensity of the 1s electron orbital of an O atom at around the binding energy of 532 eV in an XPS spectrum as determined by X-ray photoelectron spectroscopy, the ratio of the peak intensity P1 to the peak intensity P2, namely the value of P1/P2 is from 1.0 to 3.0.
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公开(公告)号：US20220173434A1
公开(公告)日：2022-06-02
申请号：US17442031
申请日：2020-01-27
Inventor： Kenji Matsubara , Kazuhiro Iida , Masanobu Takeuchi , Atsushi Fukui
IPC: H01M10/0567 , H01M4/583 , H01M10/0568 , H01M10/0569 , H01M10/0525
Abstract: A secondary battery which comprises a positive electrode, a negative electrode, and an electrolytic solution, wherein the electrolytic solution comprises water, a lithium salt, and an additive, the additive including at least one of alkaline-earth metal salts, dicarboxylic acids, carboxylic anhydrides, and organic carbonates, and the negative electrode comprises a negative active material, the negative active material having a silane coupling agent adherent to the surface thereof.
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公开(公告)号：US20190221824A1
公开(公告)日：2019-07-18
申请号：US16358920
申请日：2019-03-20
Inventor： Tomoki Tsuji , Manabu Takijiri , Yoshinori Sakai , Masanobu Takeuchi
IPC: H01M2/26 , H01M10/0587 , H01M2/02 , H01M4/525 , H01M10/0525
CPC classification number: H01M2/263 , H01M2/022 , H01M2/26 , H01M4/131 , H01M4/525 , H01M4/70 , H01M10/052 , H01M10/0525 , H01M10/0587
Abstract: This non-aqueous electrolyte secondary battery has an electrode body comprising a positive electrode and a negative electrode which are wound around while sandwiching a separator therebetween, and housed in a cylindrical housing member. The positive electrode has a positive electrode collector and a positive electrode active substance layer extending above the positive electrode collector. The negative electrode has a negative electrode collector, a negative electrode active substance layer extending above the negative electrode collector, and a negative electrode lead connected to the negative electrode collector. The negative electrode lead is disposed more toward the wound core of the electrode body than the end portion of the negative electrode active substance layer and the end portion of the positive electrode active substance layer.
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