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公开(公告)号：US20240145685A1
公开(公告)日：2024-05-02
申请号：US18399235
申请日：2023-12-28
发明人： Fan YANG , Yanyun ZHAI , Jian ZHANG , Kongyan XIE , Fen LIU , Jinshuai YANG , Chong PENG
CPC分类号： H01M4/366 , H01M4/131 , H01M4/136 , H01M4/623 , H01M4/625 , H01M10/4235 , H01M2004/021
摘要： This application provides an electrode sheet and an electrochemical device. The electrode sheet includes a current collector and a functional coating located on at least one surface of the current collector. The functional coating includes a first coating, a second coating and an active material layer that are sequentially stacked on a surface of the current collector. The first coating includes a conductive agent, a binder and a first functional filler, and the second coating includes a conductive agent, a binder and a second functional filler. A mass ratio of the binder in the first coating to the first coating is a1, a mass ratio of the binder in the second coating to the second coating is a2, and a mass ratio of the binder in the active material layer to the active material layer is a3, and a1>a2>a3.
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公开(公告)号：US20240072254A1
公开(公告)日：2024-02-29
申请号：US18498826
申请日：2023-10-31
发明人： Bo CHEN , Chong PENG , Shichao WEI , Junyi LI
CPC分类号： H01M4/525 , H01M4/131 , H01M2004/028
摘要： Disclosed are a positive electrode plate and a battery. A relationship is established between a thickness of an electrode plate, distribution of lithium cobalt oxide with a structure of different contents of element aluminum, and full battery cycling performance. That is, based on a thickness of the electrode plate, lithium cobalt oxide with an appropriate content of the element aluminum is selected, and distribution in a thickness direction of the positive electrode plate is changed, so that the content of Al in the thickness direction of the electrode plate generally presents a distribution trend of less content of Al in a bottom layer and more content of Al in a top layer. In this way, a problem of deterioration of high temperature cycling of a lithium-ion battery due to decreased structural stability of existing lithium cobalt oxide may be solved.
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公开(公告)号：US20230066253A1
公开(公告)日：2023-03-02
申请号：US17979299
申请日：2022-11-02
发明人： Wei HE , Chong PENG , Bo CHEN , Junyi LI , Yanming XU
IPC分类号： H01M4/583 , H01M10/0525 , H01M4/36 , H01M4/38 , H01M4/04
摘要： A negative electrode sheet, its fabricating method, and a battery containing negative electrode sheet are provided. The negative electrode sheet includes: a current collector; a first active layer provided on a surface of at least one side of the current collector, and a second active layer provided on a surface of one side of the first active layer away from the current collector, the first active layer is different from the second active layer, the first active layer includes a first active material including a first graphite, and the second active layer includes a second active material including a second graphite; and a ratio of the second capacity ratio for the second active material to the first capacity ratio for the first active material is greater than 1.
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公开(公告)号：US20240332510A1
公开(公告)日：2024-10-03
申请号：US18737891
申请日：2024-06-07
发明人： Baohai ZHANG , Chong PENG , Junyi LI
IPC分类号： H01M4/36 , H01M4/02 , H01M4/133 , H01M4/587 , H01M10/0525
CPC分类号： H01M4/366 , H01M4/133 , H01M4/587 , H01M10/0525 , H01M2004/021 , H01M2004/027
摘要： A negative electrode sheet, including a negative current collector, where a first negative electrode film layer is attached to a surface of the negative current collector, and an active substance of the first negative electrode film layer includes silicon particles and first graphite particles; a second negative electrode film layer is attached to a surface of the first negative electrode film layer, and an active substance of the second negative electrode film layer includes second graphite particles. That is, a negative electrode film layer is divided into two layers, such that when lithium-ions move to the negative electrode sheet, part of lithium-ions are first embedded into the second negative electrode film layer, and the remaining lithium-ions are embedded into the first negative electrode film layer.
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公开(公告)号：US20240339668A1
公开(公告)日：2024-10-10
申请号：US18746454
申请日：2024-06-18
发明人： Baohai ZHANG , Chong PENG , Junyi LI
IPC分类号： H01M10/0587 , C09J9/00 , H01M4/02 , H01M4/13 , H01M10/0525 , H01M50/531
CPC分类号： H01M10/0587 , C09J9/00 , H01M4/13 , H01M10/0525 , H01M50/531 , H01M2004/027 , H01M2004/028
摘要： A winding battery includes a positive electrode plate and a negative electrode plate which are formed by winding, the positive electrode plate includes a positive electrode current collector and a first coating layer, and the negative electrode plate includes a negative electrode current collector and a negative electrode active layer. The first coating layer includes a first insulating adhesive layer and a positive electrode active layer, the positive electrode active layer is disposed on a surface of the positive electrode current collector, the first insulating adhesive layer is connected to the positive electrode active layer, and at least one cross section of the first insulating adhesive layer and an end surface, close to a winding start point, of the negative electrode active layer are located in a same plane.
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公开(公告)号：US20230361435A1
公开(公告)日：2023-11-09
申请号：US18354480
申请日：2023-07-18
发明人： Jian ZHANG , Yanyun ZHAI , Chong PENG
IPC分类号： H01M50/533 , H01M4/13 , H01M4/66
CPC分类号： H01M50/533 , H01M4/13 , H01M4/667 , H01M4/668
摘要： Disclosed are an electrode plate and an electrochemical apparatus. A first function surface of a current collector in the electrode plate includes a first active layer region and a first tab region, a second function surface of the current collector includes a second active layer region corresponding to the first active layer region and a second tab region corresponding to the first tab region, and an active layer is disposed in the first active layer region and/or the second active layer region. The first tab region is provided with N through holes penetrating to the second tab region, a tab passes through a through hole, and a first section of the tab is connected to the first tab region to form a first connection region and a second section of the tab is connected to the second tab region to form a second connection region, where N≥1.
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公开(公告)号：US20230361358A1
公开(公告)日：2023-11-09
申请号：US18354885
申请日：2023-07-19
发明人： Baohai ZHANG , Chong PENG , Junyi LI
IPC分类号： H01M10/0587 , H01M10/0525
CPC分类号： H01M10/0587 , H01M10/0525
摘要： Disclosed is a battery, which includes a jelly roll. The jelly roll includes a first electrode plate, a separator, and a second electrode plate; the first tab is close to a first bending portion of a first end of the jelly roll, the second tab is close to a second bending portion of a second end of the jelly roll, a winding tail end of the jelly roll covers the first bending portion, and the winding tail end extends in a direction from the first bending portion to the second bending portion; and an outer side of the jelly roll includes a first outer adhesive paper, a region between a head of the second end of the jelly roll and the second tab directly faces a first portion of the jelly roll, and the first outer adhesive paper covers at least one side surface of the first portion.
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公开(公告)号：US20230207776A1
公开(公告)日：2023-06-29
申请号：US18145657
申请日：2022-12-22
发明人： Fen LIU , Chong PENG
IPC分类号： H01M4/13 , H01M10/0525 , H01M10/0587 , H01M4/36 , H01M4/62 , H01M50/586 , H01M50/59 , H01M50/531
CPC分类号： H01M4/13 , H01M10/0525 , H01M10/0587 , H01M4/366 , H01M4/62 , H01M50/586 , H01M50/59 , H01M50/531 , H01M2004/028
摘要： Disclosed is a lithium ion battery. The lithium ion battery includes a positive electrode plate, a negative electrode plate and a separator. The positive electrode plate, the separator and the negative electrode plate are stacked successively and then wound from inside to outside. The positive electrode plate includes a positive electrode current collector. At least one functional surface of the positive electrode current collector is provided with a protective layer. A surface of the protective layer away from the positive electrode current collector is provided with a positive electrode active layer. A length of the protective layer is greater than a length of the positive electrode active layer in a winding direction of the positive electrode current collector. According to the present application, by increasing a protection area of the protective layer for a positive electrode current collector, safety performance of the lithium ion battery is improved.
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公开(公告)号：US20240145757A1
公开(公告)日：2024-05-02
申请号：US18400357
申请日：2023-12-29
发明人： Baohai ZHANG , Chong PENG , Junyi LI
CPC分类号： H01M10/0431 , H01M4/366 , H01M4/62 , H01M10/4235 , H01M2004/027
摘要： The present application provides a rolled core and a battery, where the rolled core includes a positive electrode piece having a paste-removal portion of positive electrode piece, and a negative electrode piece including a negative current collector, a negative active material layer, and a gap filling body; the paste-removal portion of positive electrode piece is a missing part of the positive electrode piece relative to the negative electrode piece at a winding-start end of the rolled core; the negative current collector includes a first side and a second side which are opposite to each other, and at least one of the first side and the second side is provided with a negative active material layer; the gap filling body is arranged on one of the first side and the second side at a position corresponding to the winding-start end of the rolled core.
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公开(公告)号：US20240136611A1
公开(公告)日：2024-04-25
申请号：US18400373
申请日：2023-12-29
发明人： Fan YANG , Jian ZHANG , Kongyan XIE , Chong PENG
IPC分类号： H01M10/63 , H01M10/44 , H01M10/615 , H01M10/623 , H01M50/531 , H02J7/00
CPC分类号： H01M10/63 , H01M10/443 , H01M10/615 , H01M10/623 , H01M50/531 , H02J7/0047 , H01M2220/30
摘要： Disclosed are a battery and an electronic device, where the battery includes a first electrode plate, a second electrode plate, a control unit, and a first tab and a second tab that are connected to the first electrode plate, and the first electrode plate and the second electrode plate have opposite polarities. The control unit includes a heating control circuit, and in a case that the battery is connected to an external power supply, the heating control circuit is configured to: when a battery temperature of the battery is less than a first temperature threshold, conduct the first tab, the first electrode plate, and the second tab to heat the battery. A charging speed of the battery at a low temperature may be improved, and lithium deposition and capacity fading of the battery may be slowed down.
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