公开(公告)号：US11050052B2

公开(公告)日：2021-06-29

申请号：US16432958

申请日：2019-06-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wenzhu Xu ,  Jianqing Sun ,  Guangbo Lu ,  Fan Sun ,  Qifan Zou ,  Shengwei Wang

IPC: H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/58 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/1393 ,  H01M4/62 ,  H01M4/02

Abstract: The present invention provides a lithium ion battery and a negative electrode material thereof. The negative electrode material includes a mixture of a graphite and an amorphous carbon, wherein the graphite is subjected to a surface treatment, and the surface treatment manner is a combination of mechanical fusion modification and spray drying coating, and wherein the graphite has a graphitization degree of 90-96%, an average particle diameter D50 of 13-25 μm and a specific surface area BET of 0.8-2.5 m2/g, and the amorphous carbon has a graphitization degree of 65-80%, an average particle diameter D50 of 2-15 μm and a specific surface area BET of 1.0-3.0 m2/g.

公开(公告)号：US20240113273A1

公开(公告)日：2024-04-04

申请号：US17959991

申请日：2022-10-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wenzhu Xu ,  Chuanmiao Yan ,  Fuping Luo ,  Xinxin Du ,  Jiao Cao

IPC: H01M4/02 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/02 ,  H01M4/131 ,  H01M4/133 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021

Abstract: The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive active material comprises a layered lithium-containing compound, the negative active material comprises graphite, the positive film and the negative film satisfy a relationship 0.3≤(OIc×PDc)/(OIa×PDa)≤20.0. The present disclosure can make the lithium-ion battery have smaller swelling and higher charging capability, and also make the lithium-ion battery have excellent cycle life and excellent safety performance during the long-term fast charging process.

公开(公告)号：US10923761B2

公开(公告)日：2021-02-16

申请号：US16272917

申请日：2019-02-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiao Cao ,  Qifan Zou ,  Guangbo Lu ,  Shengwei Wang ,  Wenzhu Xu

IPC: H01M4/00 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/02

Abstract: The present disclosure provides a lithium-ion battery, and the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The positive active material comprises a material with a chemical formula of LiaNixCoyM1-x-yO2, the negative active material comprises graphite, the OI value of the positive film represented by OIc and the OI value of the negative film represented by OIa satisfy a relationship: 0.05≤OIa/OIc≤10. By reasonably matching the OI value of the positive film represented by OIc and the OI value of the negative film represented by OIa and making OIa/OIc between 0.05 and 10, the dynamics performance of the positive electrode plate and the dynamics performance of the negative electrode plate can achieve an optimal match, the lithium-ion battery can have higher charging capability, and also have excellent cycle life and excellent safety performance during the long-term fast charging use.

公开(公告)号：US20240178448A1

公开(公告)日：2024-05-30

申请号：US18429431

申请日：2024-02-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xihui Wang ,  Wenzhu Xu ,  Zeli Wu ,  Canlong Wu ,  Di Liu ,  Qifan Zou

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0037

Abstract: The embodiments of the present application provide an electrolyte solution and a lithium-ion battery comprising the same. The electrolyte solution includes a solvent, a lithium salt and a first additive, and the first additive has a molecular formula of




wherein R is at least one of an H element, a halogen element or an alkyl group having 1 to 3 carbon atoms. The electrolyte solution provided in the embodiments of the present application has the advantages of having a long shelf life, avoiding the problem of the performance decline of lithium-ion batteries due to deterioration of electrolyte solutions, being capable of inhibiting an increase of internal resistance of the lithium-ion batteries in low-temperature cycles, and improving the performance of the lithium-ion batteries.

公开(公告)号：US11502328B2

公开(公告)日：2022-11-15

申请号：US16443371

申请日：2019-06-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wenzhu Xu ,  Chuanmiao Yan ,  Fuping Luo ,  Xinxin Du ,  Jiao Cao

IPC: H01M10/0525 ,  H01M10/04

Abstract: The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive active material comprises a layered lithium-containing compound, the negative active material comprises graphite, the positive film and the negative film satisfy a relationship 0.3≤(OIc×PDc)/(OIa×PDa)≤20.0. The present disclosure can make the lithium-ion battery have smaller swelling and higher charging capability, and also make the lithium-ion battery have excellent cycle life and excellent safety performance during the long-term fast charging process.

公开(公告)号：US20190097433A1

公开(公告)日：2019-03-28

申请号：US16138470

申请日：2018-09-21

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qifan ZOU ,  Fuping Luo ,  Xinxin Du ,  Shengwei Wang ,  Wenzhu Xu

IPC: H02J7/00 ,  H01M10/48 ,  H01M4/58 ,  H01M10/44

Abstract: The present disclosure provides a method, apparatus, and device for charging a battery, and storage medium. The method for charging a battery includes acquiring a battery temperature; determining a charging current value In for the nth charging stage of the battery corresponding to a charging cut-off SOC Sn for the nth charging stage, according to the acquired battery temperature and a preset mapping relationship between a charging cut-off SOC S and a charging current value I for different temperature ranges; charging the battery with Ij in the jth charging stage; acquiring a SOC of the battery at the current time; if the SOC is less than Sj, continuing to charge the battery with if the SOC is not less than Sj and j

公开(公告)号：US20190288279A1

公开(公告)日：2019-09-19

申请号：US16432958

申请日：2019-06-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wenzhu Xu ,  Jianqing Sun ,  Guangbo Lu ,  Fan Sun ,  Qifan Zou ,  Shengwei Wang

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/587

Abstract: The present invention provides a lithium ion battery and a negative electrode material thereof. The negative electrode material includes a graphite and an amorphous carbon, wherein the graphite has a graphitization degree of 90˜96% and an average particle diameter D50 of 2˜25 μm, and the amorphous carbon has a graphitization degree of 65˜80% and an average particle diameter D50 of 2˜25 μm. Compared with the prior art, by mixing graphite having a small particle diameter with amorphous carbon, the negative electrode material of the present invention has excellent dynamic performance, cycle performance and storage performance. The present invention also provides a lithium ion battery.