公开(公告)号：US20240170726A1

公开(公告)日：2024-05-23

申请号：US18426355

申请日：2024-01-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Huiling Chen ,  Changlong Han ,  Bin Jiang ,  Qian Liu ,  Jianfu He ,  Jingxuan Sun ,  Lei Huang

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028

Abstract: This application provides a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains the non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a tetrafluoroborate anion BF4−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.1 to 1250 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

公开(公告)号：US11735775B2

公开(公告)日：2023-08-22

申请号：US17402672

申请日：2021-08-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bin Jiang ,  Changlong Han ,  Chenghua Fu ,  Rui Shen ,  Yuanyuan Li

IPC: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0037

Abstract: The present application provides a secondary battery, an electrolyte, and an apparatus including the secondary battery. The secondary battery of the present application includes an electrolyte, characterized in that the electrolyte includes an organic solvent, and the organic solvent includes a cyclic carbonate and a chain carbonate; the mass ratio of the cyclic carbonate and the chain carbonate is from 25:75 to 32:68; the chain carbonate includes dimethyl carbonate; the mass percentage of the dimethyl carbonate in the chain carbonate is greater than or equal to 9 wt % and less than 50 wt %; wherein based on the total mass of the organic solvent, the mass percentage of a carboxylic acid ester is less than 5 wt %. The secondary battery of the present application can simultaneously obtain excellent low-temperature power, long service life and cycle performance.

公开(公告)号：US20220123286A1

公开(公告)日：2022-04-21

申请号：US17566698

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhiqiang LI ,  Qifeng Li ,  Changlong Han

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04

Abstract: A lithium-ion secondary battery and related preparation method thereof, battery module, battery pack and apparatus. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, an electrolyte and a separator, wherein the positive electrode plate includes a positive electrode current collector and a first positive electrode active material layer and a second positive electrode active material layer sequentially disposed on at least one side of the positive electrode current collector; the lithium-ion secondary battery satisfies: −1≤log10(u/v)×w≤15.5, wherein, u is a thickness of the first positive electrode active material layer in microns, v is a thickness of the second positive electrode active material layer in microns, w is a conductivity of the electrolyte at a temperature of 25° C. in mS·cm−1. The lithium-ion secondary battery has excellent performance such as low discharge resistance at low SOC and low gas production at high temperature.

公开(公告)号：US10826121B2

公开(公告)日：2020-11-03

申请号：US15891197

申请日：2018-02-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Feng Ju ,  Shaowei Feng ,  Changlong Han ,  Xiaochong Zhou ,  Ming Zhang

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

Abstract: The present disclosure provides an electrolyte and a secondary battery. The electrolyte comprises: a non-aqueous organic solvent; an electrolyte salt dissolved in the non-aqueous organic solvent; and an additive dissolved in the non-aqueous organic solvent. The additive comprises a first additive, the first additive is selected from boron phosphate represented by formula 1. When the electrolyte of the present disclosure is applied in the secondary battery, the performances of the secondary battery under high temperature environment can be effectively improved.

公开(公告)号：US20200152964A1

公开(公告)日：2020-05-14

申请号：US16679168

申请日：2019-11-09

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： ZHIQIANG LI ,  Changlong Han

IPC: H01M4/133 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0567

Abstract: This application discloses a negative electrode plate and a lithium-ion secondary battery, wherein the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on at least one surface of the negative electrode current collector, and wherein the negative active material layer includes a graphite material; wherein a ratio r between diffraction peak intensity of (004) crystal surface and diffraction peak intensity of (110) crystal surface of the negative electrode plate, a porosity s of the negative electrode plate, and a resistivity t of the negative electrode plate satisfy: 0.05 ≤ 100 × s r × t ≤ 10. The negative electrode plate and the lithium-ion secondary battery provided by this application can simultaneously achieve high safety performance, cycle performance and rate performance.

公开(公告)号：US20190355983A1

公开(公告)日：2019-11-21

申请号：US16415043

申请日：2019-05-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ming Zhang ,  Hao Zhang ,  Cuiping Zhang ,  Changlong Han ,  Chenghua Fu

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M4/60 ,  H01M10/0525

Abstract: The present disclosure provides a lithium ion battery including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive electrode active material. The positive electrode active material includes a matrix, a first coating layer on the matrix in form of discrete islands, and a second coating layer on the first coating layer and the matrix as a continuous layer. The electrolyte includes an additive A and an additive B. The additive A is selected from a group consisting of cyclic sulfate compounds represented by Formula 1 and Formula 2, and combinations thereof, and the additive B is one or two selected from lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate.

公开(公告)号：US20180294483A1

公开(公告)日：2018-10-11

申请号：US15942178

申请日：2018-03-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Ming Zhang ,  Changlong Han

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

Abstract: The present disclosure provides a positive electrode plate and an energy storage device. The positive electrode plate comprises a positive current collector and a positive electrode film provided on the positive current collector and comprising a positive electrode active material; the positive electrode film further comprises an additive, the additive comprises a C—C double bond-containing sultone. When the positive electrode plate of the present disclosure is applied in the energy storage device, the energy storage device has lower direct current internal resistance, excellent high temperature storage performance, excellent high temperature thermal stability performance and excellent low temperature lithium precipitation performance at the same time.

公开(公告)号：US20240396088A1

公开(公告)日：2024-11-28

申请号：US18791446

申请日：2024-08-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jie Guo ,  Zeli Wu ,  Changlong Han ,  Guan Wang

IPC: H01M10/0568 ,  H01M4/02 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/42

Abstract: The present application provides a non-aqueous electrolyte, a secondary battery, and an electrical device. The non-aqueous electrolyte includes at least two of a boron-containing lithium salt additive, a phosphorus-containing lithium salt additive, and a sulfur-containing lithium salt additive; based on a total mass of the non-aqueous electrolyte, a mass percentage of the boron-containing lithium salt additive is A1%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the phosphorus-containing lithium salt additive is A2%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the sulfur-containing lithium salt additive is A3%; and the non-aqueous electrolyte satisfies: 0

公开(公告)号：US20240266606A1

公开(公告)日：2024-08-08

申请号：US18599285

申请日：2024-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Lei Huang ,  Cuiping Zhang

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M2300/0025

Abstract: Provided are a lithium-ion battery, including a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, wherein in the battery, a ratio of a negative electrode capacity to a positive electrode capacity is a, and the electrolyte includes thiourea compounds in an amount of b weight % based on the total weight of the electrolyte, wherein the lithium-ion battery meets the following relationship: a

公开(公告)号：US20240170652A1

公开(公告)日：2024-05-23

申请号：US18408597

申请日：2024-01-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping Zhang ,  Changlong Han ,  Miaomiao Ren ,  Zeli Wu ,  Lei Huang

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/84 ,  H01M2004/028

Abstract: This application provides a positive electrode active material. Surface of a first lithium salt is coated with a coating layer containing a second lithium salt, which not only blocks the corrosive decomposition of the first lithium salt by the electrolyte but also allows the second lithium salt to form CEI films in situ on surfaces of the first lithium salt particles, thereby improving the film structure and avoiding the decomposition of active components in the electrolyte. Additionally, the second lithium salt contains both elements fluorine and phosphorus, which makes the composition of the film formed as consistent as possible with the composition of the film formed by lithium hexafluorophosphate in the electrolyte, thereby reducing the consumption of active lithium in the electrolyte. The positive electrode active material of this application can significantly improve the power performance and cycle life of batteries.