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1.发明公开公开(公告)号：US20230148028A1
公开(公告)日：2023-05-11
申请号：US17894715
申请日：2022-08-24
发明人： Tomohiro Sekiya , Kensaku Miyazawa , Kazuo Tojima , Hitoshi Nakamura , Haruyoshi Sakakibara , Yasutaka Terashima
IPC分类号： G01R31/52 , G01R31/385
CPC分类号： G01R31/52 , G01R31/3865
摘要： A method for evaluating an electric power storage device includes causing a short circuit by inserting an electrically conductive probe into a stacked portion in a thickness direction of electrode layers; measuring a penetration depth of the probe after the short circuit occurs; and evaluating the number of electrode layers involved in the short circuit based on the penetration depth. The penetration depth is identified by measuring a length of an adhesion portion in an axial direction of the probe. The adhesion portion is a portion of a surface of the probe to which a constituent material of the stacked portion adheres.
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公开(公告)号：US20220021004A1
公开(公告)日：2022-01-20
申请号：US17366379
申请日：2021-07-02
发明人： Akira KIYAMA , Sho Ando , Kunimitsu Yamamoto , Masaki Kato , Koshiro Yoneda , Kensaku Miyazawa
IPC分类号： H01M4/66 , H01M10/0525 , H01M4/04 , H01M4/525 , H01M4/505 , H01M4/58 , H01M4/74 , H01M4/36 , H01M50/46
摘要： A cell, which is a non-aqueous electrolyte secondary battery, includes: an electrode assembly including a plurality of sheet-shaped positive electrodes and a plurality of sheet-shaped negative electrodes, the plurality of positive electrodes and the plurality of negative electrodes being alternately stacked with separators interposed therebetween; and a battery case that houses the electrode assembly. The electrode assembly includes: an outer layer including a positive electrode arranged on an outermost side of the electrode assembly, and a separator adjacent to the positive electrode; and an inner layer arranged on an inner side of the outer layer. The outer layer includes a fusing member configured to fuse due to heat generation in the electrode assembly caused by a short circuit in the electrode assembly. The inner layer does not include the fusing member.
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公开(公告)号：US10718816B2
公开(公告)日：2020-07-21
申请号：US16222170
申请日：2018-12-17
发明人： Yuya Ishihara , Kensaku Miyazawa , Tetsuya Kaneko
摘要： (a) A power storage device is prepared. (b) An evaluation jig is prepared. The evaluation jig includes an insulating tubular member and a conductive needle-shaped member. (c) A charge level of the power storage device is adjusted. (d) A positive electrode or a negative electrode is selected as a reference electrode. (e) An operation to insert the evaluation jig into the power storage device is performed. (f) The insertion operation is controlled to stop the tubular member when a tip end of the needle-shaped member comes in contact with an electrode different from the reference electrode. (g) Short-circuiting through the needle-shaped member is caused. (h) The power storage device is evaluated based on a state of the short-circuiting power storage device.
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4.发明公开公开(公告)号：US20230236255A1
公开(公告)日：2023-07-27
申请号：US18295517
申请日：2023-04-04
IPC分类号： G01R31/385 , G01R31/3842 , H01M10/44 , H01M10/42 , H02J7/00 , G01R31/50
CPC分类号： G01R31/3865 , G01R31/3842 , H01M10/44 , H01M10/4285 , H02J7/0069 , G01R31/50 , G01R31/388
摘要： A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.
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公开(公告)号：US11002799B2
公开(公告)日：2021-05-11
申请号：US16900232
申请日：2020-06-12
IPC分类号： H01M10/48 , H01G13/00 , G01R31/50 , G01R31/3842 , H01M10/44 , H01M10/42 , G01R31/385 , H02J7/00 , G01R31/388
摘要： A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.
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公开(公告)号：US10725119B2
公开(公告)日：2020-07-28
申请号：US16197571
申请日：2018-11-21
IPC分类号： H01M10/48 , H01G13/00 , G01R31/50 , G01R31/3842 , H01M10/44 , H01M10/42 , G01R31/385 , H02J7/00 , H01J7/00 , G01R31/388
摘要： A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.
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公开(公告)号：US11650260B2
公开(公告)日：2023-05-16
申请号：US17224340
申请日：2021-04-07
IPC分类号： G01R31/385 , G01R31/3842 , H01M10/44 , H01M10/42 , H02J7/00 , G01R31/50 , G01R31/388
CPC分类号： G01R31/3865 , G01R31/3842 , G01R31/50 , H01M10/4285 , H01M10/44 , H02J7/0069 , G01R31/388
摘要： A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.
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公开(公告)号：US20220059876A1
公开(公告)日：2022-02-24
申请号：US17376956
申请日：2021-07-15
发明人： Sho Ando , Akira Kiyama , Masaki Kato , Koshiro Yoneda , Kensaku Miyazawa , Kunimitsu Yamamoto
IPC分类号： H01M10/0585 , H01M10/0525
摘要： An all-solid-state battery includes a solid electrode body including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, and a laminate film that stores the solid electrode body. The laminate film has a fragile part with respect to a needle-like foreign substance. The strength of the fragile part is lower than the strength of a part of the laminate film other than the fragile part.
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9.发明申请公开(公告)号：US20190162771A1
公开(公告)日：2019-05-30
申请号：US16197571
申请日：2018-11-21
IPC分类号： G01R31/02 , G01R31/3842 , G01R31/388 , H02J7/00
摘要： A method of evaluating a power storage device includes at least [a] to [f] below. [a] A power storage device is prepared. [b] A charge level of the power storage device is adjusted to produce a first potential difference between a positive electrode and a negative electrode. [c] The positive electrode or the negative electrode is selected as a reference electrode. [d] After the charge level is adjusted, an operation to insert a conductive rod-shaped member into a stack portion along a direction of stack of the positive electrode and the negative electrode is performed while a second potential difference between the reference electrode and the rod-shaped member is measured. [e] The rod-shaped member is stopped. [f] The power storage device is evaluated based on a state of the power storage device after the rod-shaped member is stopped.
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