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公开(公告)号：US11367906B2
公开(公告)日：2022-06-21
申请号：US17049830
申请日：2019-04-01
发明人： Hiroki Kagohashi
摘要： A lead-acid battery provided with a negative electrode plate, a positive electrode plate, and an electrolyte solution. The negative electrode plate includes a negative current collector and a negative electrode material. When it is defined in a log differential pore volume distribution of the negative electrode material that a) a region having a pore size of 1 to 3 μm is a P region, b) a region having a pore size of 6 to 15 μm is a Q region, c) a maximum value of the log differential pore volume in the P region is P, and d) a maximum value of the log differential pore volume in the Q region is Q, after initial degradation, during use, or after 1220 cycles in a light-load life test in which charge and discharge of constant current discharge at 25 A for one minute and constant voltage charge at 2.47 V/cell and an upper limit current of 25 A for ten minutes are repeated at a test temperature of 75° C., the log differential pore volume distribution of the negative electrode material has a peak p corresponding to the maximum value P in the P region and a peak q corresponding to the maximum value Q in the Q region, and the maximum value P and the maximum value Q satisfy 0.25≤P/(P+Q)≤0.63.
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公开(公告)号：US11658347B2
公开(公告)日：2023-05-23
申请号：US17614886
申请日：2020-05-29
发明人： Yasuyuki Hamano , Hiroki Kagohashi
CPC分类号： H01M10/06 , H01M4/662 , H01M4/0478 , H01M2004/027 , H01M2004/028
摘要： A lead-acid battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution, in which the positive electrode plate includes a positive current collector and a positive electrode material, the negative electrode plate includes a negative current collector and a negative electrode material, the positive current collector contains Sn in an amount of 0.95% by mass or more, the negative electrode material contains a polymer compound, and the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1H-NMR spectrum, or the polymer compound contains a repeating structure of oxy C2-4 alkylene units.
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公开(公告)号：US11735742B2
公开(公告)日：2023-08-22
申请号：US17608870
申请日：2020-05-29
摘要： A lead-acid battery includes a positive electrode plate, a negative electrode plate, an electrolyte solution, and a polymer compound, in which the positive electrode plate includes a positive current collector and a positive electrode material, the negative electrode plate includes a negative current collector and a negative electrode material, the Ca content of the positive current collector is 0.13% by mass or less, and the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of 1H-NMR spectrum, or the polymer compound contains a repeating structure of oxy C2-4 alkylene units.
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公开(公告)号：US11424452B2
公开(公告)日：2022-08-23
申请号：US16336932
申请日：2017-09-15
发明人： Hiroki Kagohashi , Ikumi Motoi
摘要： The organic expander in a negative electrode material of a lead-acid battery contains an S polymer having an aromatic ring and an L polymer having an aromatic ring, and a mass MS1 of the S polymer and a mass ML1 of the L polymer satisfy 0.05≤ML1/(ML1+MS1)≤0.15.
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