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公开(公告)号：US20200280071A1
公开(公告)日：2020-09-03
申请号：US16878906
申请日：2020-05-20
Inventor： Kazuhiro Yoshii
Abstract: A secondary battery according to one embodiment of the present disclosure comprises a positive electrode, a negative electrode, a positive electrode lead that is electrically connected to the positive electrode, and an insulating tape that covers a part of the positive electrode lead. The positive electrode lead has: one end part which is connected to an exposed part of a positive electrode collector that constitutes the positive electrode; and an extension part which extends outwardly from the one end part beyond the periphery of the positive electrode collector. An insulating layer is arranged on the outer surface of the one end part of the positive electrode lead; and the insulating layer is covered by the insulating tape.
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Patent Agency Ranking
公开(公告)号：US12266785B2
公开(公告)日：2025-04-01
申请号：US17441491
申请日：2020-01-27
Inventor： Kazuhiro Yoshii , Takahiro Takahashi
IPC: H01M4/36 , H01M4/02 , H01M4/13 , H01M4/131 , H01M4/139 , H01M4/1391 , H01M4/48 , H01M4/62 , H01M10/0525
Abstract: This secondary battery comprises an electrode body that includes a positive electrode, a negative electrode, and a separator. The positive electrode has a positive electrode core, and a positive electrode mixture layer provided on the surface of the positive electrode core. The positive electrode mixture layer includes a positive electrode active material configured by secondary particles in which primary particles are aggregated. The packing density of the positive electrode active material in the positive electrode mixture layer is 3.2 g/cm3 or greater, and the crush rate of 30 pieces of the positive electrode active material existing on the surface of the positive electrode is 75% or less.
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公开(公告)号：US20220344659A1
公开(公告)日：2022-10-27
申请号：US17763021
申请日：2020-07-21
Inventor： Yuji Oura , Kazuhiro Yoshii , Yuta Kuroda
IPC: H01M4/583 , H01M10/0525 , H01M4/36 , H01M4/40
Abstract: This negative electrode is provided with a negative electrode current collector, and a negative electrode mixture layer formed on the negative electrode current collector, wherein: the negative electrode mixture layer comprises a first layer arranged on the negative electrode current collector, and a second layer arranged on the first layer; the second layer includes graphite particles A having a particle internal porosity of at most 10%: the first layer includes graphite particles B having a particle internal porosity of more than 10%; and the second layer has a water contact angle of at most 50°.
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公开(公告)号：US11437619B2
公开(公告)日：2022-09-06
申请号：US16878906
申请日：2020-05-20
Inventor： Kazuhiro Yoshii
Abstract: A secondary battery according to one embodiment of the present disclosure comprises a positive electrode, a negative electrode, a positive electrode lead that is electrically connected to the positive electrode, and an insulating tape that covers a part of the positive electrode lead. The positive electrode lead has: one end part which is connected to an exposed part of a positive electrode collector that constitutes the positive electrode; and an extension part which extends outwardly from the one end part beyond the periphery of the positive electrode collector. An insulating layer is arranged on the outer surface of the one end part of the positive electrode lead; and the insulating layer is covered by the insulating tape.
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公开(公告)号：US20220181606A1
公开(公告)日：2022-06-09
申请号：US17441491
申请日：2020-01-27
Inventor： Kazuhiro Yoshii , Takahiro Takahashi
Abstract: This secondary battery comprises an electrode body that includes a positive electrode, a negative electrode, and a separator. The positive electrode has a positive electrode core, and a positive electrode mixture layer provided on the surface of the positive electrode core. The positive electrode mixture layer includes a positive electrode active material configured by secondary particles in which primary particles are aggregated. The packing density of the positive electrode active material in the positive electrode mixture layer is 3.2 g/cm3 or greater, and the crush rate of 30 pieces of the positive electrode active material existing on the surface of the positive electrode is 75% or less.
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公开(公告)号：US10340530B2
公开(公告)日：2019-07-02
申请号：US15760336
申请日：2016-10-11
Inventor： Kazuhiro Yoshii
Abstract: An alkaline dry cell includes a bottomed cylindrical cell case, a positive electrode packed in the cell case and is made of a stack of n pieces of hollow cylindrical pellets, a negative electrode disposed in a hollow portion of the pellets, a separator interposed between the positive electrode and the negative electrode, and an alkaline electrolytic solution. A thickness of a body portion of the cell case is 0.08 to 0.16 mm. “n” is an integer of 3 or more. An average density dm of manganese dioxide in the n pellets is 2.80 to 3.00 g/cm3. A density of manganese dioxide of at least one pellet positioned in a middle portion in a height direction of the stack is 2.75 g/cm3 or less.
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