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公开(公告)号：US12100817B2
公开(公告)日：2024-09-24
申请号：US18415676
申请日：2024-01-18
发明人： Longfei Yang , Limei Yang
IPC分类号： H01M10/42 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M50/609 , H01M50/691
CPC分类号： H01M10/4242 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M10/0525 , H01M10/0569 , H01M50/609 , H01M50/691 , H01M2010/4292 , H01M2300/0037
摘要： This application provides a method for capacity recovery of lithium-ion secondary battery. The method includes the following steps:
(1) providing a capacity-degraded lithium-ion battery;
(2) providing a capacity recovery agent, the capacity recovery agent including a lithium iodide and an organic solvent, and the organic solvent being used to dissolve the lithium iodide;
(3) injecting the capacity recovery agent into the capacity-degraded lithium-ion battery;
(4) enabling the capacity recovery agent to react inside the lithium-ion battery; and
(5) pouring out the liquid mixture inside the reacted lithium-ion battery and injecting an electrolyte into the lithium-ion battery.-
公开(公告)号：US20240213544A1
公开(公告)日：2024-06-27
申请号：US18599922
申请日：2024-03-08
发明人： Wei Luo , Longfei Yang , Limei Yang , Simin Ye
IPC分类号： H01M10/0587 , H01M10/04 , H01M50/209
CPC分类号： H01M10/0587 , H01M10/0409 , H01M10/0431 , H01M50/209 , H01M2220/20
摘要： This application provides a jelly-roll electrode assembly, a battery cell, a battery, an electrical device, and a method and equipment for manufacturing the jelly-roll electrode assembly. The application relates to the field of battery technology. The jelly-roll electrode assembly includes a positive electrode plate. The positive electrode plate includes a positive current collector and a first positive active material layer disposed on an inner surface of the positive current collector. The positive electrode plate includes a plurality of layers of bend portion located in a bend region and arranged sequentially from inside to outside. The first positive active material layer includes a plurality of first positive active material portions located in the plurality of layers of bend portion. A plurality of first grooves are created in at least one of the first positive active material portions.
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公开(公告)号：US20240154184A1
公开(公告)日：2024-05-09
申请号：US18415676
申请日：2024-01-18
发明人： Longfei Yang , Limei Yang
IPC分类号： H01M10/42 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/0525 , H01M10/0569 , H01M50/609 , H01M50/691
CPC分类号： H01M10/4242 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M10/0525 , H01M10/0569 , H01M50/609 , H01M50/691 , H01M2010/4292 , H01M2300/0037
摘要： This application provides a method for capacity recovery of lithium-ion secondary battery. The method includes the following steps:
(1) providing a capacity-degraded lithium-ion battery;
(2) providing a capacity recovery agent, the capacity recovery agent including a lithium iodide and an organic solvent, and the organic solvent being used to dissolve the lithium iodide;
(3) injecting the capacity recovery agent into the capacity-degraded lithium-ion battery;
(4) enabling the capacity recovery agent to react inside the lithium-ion battery; and
(5) pouring out the liquid mixture inside the reacted lithium-ion battery and injecting an electrolyte into the lithium-ion battery.-
公开(公告)号：US11996545B2
公开(公告)日：2024-05-28
申请号：US17416026
申请日：2019-02-26
发明人： Longfei Yang , Guobao Wang , Xiaomei Liu , Jiang Liu , Yongshou Lin , Fenggang Zhao
IPC分类号： H01M4/134 , H01M4/02 , H01M4/133 , H01M4/136 , H01M4/36 , H01M4/38 , H01M4/58 , H01M4/587 , H01M10/0525 , H01M10/42
CPC分类号： H01M4/134 , H01M4/133 , H01M4/366 , H01M4/382 , H01M4/587 , H01M10/0525 , H01M2004/027 , H01M4/136 , H01M4/5825 , H01M2010/4292
摘要： An electrode assembly and a lithium-ion battery are described. The electrode assembly includes a positive electrode plate, a separator, and a negative electrode plate, where the negative electrode plate includes a negative electrode current collector and a negative electrode active substance layer, the negative electrode plate further includes a lithium metal layer, the lithium metal layer is formed by a plurality of regular or irregular strip-shaped lithium-rich regions, and the plurality of lithium-rich regions present a discontinuous pattern of spaced distribution in a length direction of the negative electrode plate. The electrode assembly further satisfies that: negative electrode capacity per unit area/positive electrode capacity per unit area=1.2 to 2.1 and negative electrode capacity per unit area/(positive electrode capacity per unit area+capacity of the lithium metal layer on the surface of the negative electrode active substance layer per unit area× 80%)≥ 1.10.
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5.发明授权公开(公告)号：US11996515B2
公开(公告)日：2024-05-28
申请号：US18338543
申请日：2023-06-21
发明人： Longfei Yang , Limei Yang , Xiaomei Liu
IPC分类号： H01M10/0525 , H01M4/04 , H01M4/66 , H01M10/0567 , H01M10/0568 , H01M10/0569 , H01M10/0585 , H01M50/103
CPC分类号： H01M10/0525 , H01M4/0404 , H01M4/667 , H01M10/0567 , H01M10/0568 , H01M10/0569 , H01M10/0585 , H01M50/103 , H01M2300/0094
摘要： A lithium-ion secondary battery includes a negative electrode sheet including a negative electrode current collector and a negative electrode film disposed on a surface of the negative electrode current collector and containing a negative active material, a positive electrode sheet including a positive electrode current collector and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive active material, and an electrolytic solution including lithium iodide, a lithium salt, a solvent, and an additive. A coating weight per unit area, CW1/S0, of the positive electrode film satisfies CW1/S0=((CW2/S0)×b×C2/CB−m×X×(199 mAh/g)/S)/(C1×a).
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公开(公告)号：US20240313204A1
公开(公告)日：2024-09-19
申请号：US18675152
申请日：2024-05-28
发明人： Chengfeng Li , Longfei Yang , Xiaomei Liu
IPC分类号： H01M4/38 , H01M4/02 , H01M4/04 , H01M4/36 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M10/0587 , H01M50/249
CPC分类号： H01M4/386 , H01M4/0416 , H01M4/366 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M10/0587 , H01M50/249 , H01M2004/027 , H01M2300/0042
摘要： Provided are a secondary battery and a preparation method thereof, and an electric device. The secondary battery includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative active material and a lithium supplement agent, and an insulating material is dissolved in the electrolyte. A mass ratio of the insulating material in the electrolyte ranges from 0.1% to 4%. The insulating material is derived from the negative electrode plate prior to injection the electrolyte, and the insulating material is arranged between the negative active material and the lithium supplement agent in the negative electrode plate prior to the injection the electrolyte.
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公开(公告)号：US11984563B1
公开(公告)日：2024-05-14
申请号：US18413093
申请日：2024-01-16
发明人： Longfei Yang , Limei Yang
IPC分类号： H01M10/42 , H01M10/0525 , H01M10/0567 , H01M50/609
CPC分类号： H01M10/4235 , H01M10/0525 , H01M10/0567 , H01M50/609
摘要： This application provides a method for capacity recovery of lithium-ion secondary battery. The method includes the following steps:
(1) providing a capacity-degraded lithium-ion secondary battery;
(2) providing a capacity recovery agent, the capacity recovery agent including a p-phenylenediamine compound, a lithium salt, and an organic solvent, and the organic solvent being used to dissolve the p-phenylenediamine compound and the lithium salt;
(3) injecting the capacity recovery agent into the lithium-ion secondary battery;
(4) enabling the capacity recovery agent to react inside the lithium-ion secondary battery; and
(5) pouring out the liquid mixture inside the lithium-ion secondary battery after reaction and injecting an electrolyte into the lithium-ion secondary battery.
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