公开(公告)号：US20250140941A1

公开(公告)日：2025-05-01

申请号：US18800159

申请日：2024-08-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Bin Jiang ,  Jie Guo

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes a lithium salt, where the lithium salt includes lithium hexafluorophosphate, and based on a total mass of the electrolyte, a mass proportion of the lithium hexafluorophosphate is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

公开(公告)号：US20250140895A1

公开(公告)日：2025-05-01

申请号：US18800152

申请日：2024-08-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Bin Jiang ,  Jie Guo

IPC: H01M10/0525 ,  C30B29/22 ,  H01M4/36 ,  H01M4/48 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes lithium salt, the lithium salt includes lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

公开(公告)号：US20240372145A1

公开(公告)日：2024-11-07

申请号：US18773617

申请日：2024-07-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huiling Chen ,  Zeli Wu ,  Changlong Han ,  Jie Guo ,  Lei Huang ,  Cuiping Zhang ,  Wenhao Liu

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

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

公开(公告)号：US11929492B2

公开(公告)日：2024-03-12

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 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

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：US20230043895A1

公开(公告)日：2023-02-09

申请号：US17822079

申请日：2022-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zeli Wu ,  Changlong Han

IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0569

Abstract: Various embodiments provide an electrolyte solution, a secondary battery, a battery module, a battery pack and an electric device. In those embodiments, the electrolyte solution includes an electrolyte, a solvent and an additive, the additive including sodium hydrosulfite. Various embodiments improve an overall performance of the secondary battery, for example, initial DCR, storage gas production, a rate performance, or the like.

公开(公告)号：US10826120B2

公开(公告)日：2020-11-03

申请号：US15572782

申请日：2017-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiqiong Liu ,  Changlong Han ,  Xiaomei Wang ,  Jianwei Zhu ,  Yan Zhou ,  Feng Huan ,  Kun Yu

IPC: H01M4/38 ,  H01M4/587 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/36

Abstract: The present invention discloses a Lithium ion battery and an electrolyte thereof, the electrolyte comprising an organic solvent, a lithium salt and an additive. The additive comprises additive (A) cyclic fluoro carbonate, additive (B) cyclic phosphazene (B), and additive (C) cyclic sulfate. The additive B cyclic phosphazene has the following general structural formula: Compared with the prior art, the electrolyte of the present invention may form a stable CEI and SEI film on the surface of positive and negative electrodes, protect the interface between positive and negative electrodes, improve the acidic atmosphere of Lithium ion battery electrolyte, and reduce the damage effect of HF on the interface between positive and negative electrodes, thereby improving cycle life, high temperature storage performance, and safety performance of lithium-ion battery.

公开(公告)号：US10686221B2

公开(公告)日：2020-06-16

申请号：US16027009

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01G11/64 ,  H01M10/0565 ,  H01M4/525 ,  H01M4/583 ,  H01M10/48 ,  H01M4/505 ,  H01M4/02

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a dioxide heterocyclic compound. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the dioxide heterocyclic compound, a dense, uniform and stable passive film on a surface of each of the positive electrode film and the negative electrode film of the electrochemical energy storage device, thereby reducing the contact between the positive, negative electrode active materials and the electrolyte, thus avoiding the occurrence of continuous oxidation and reduction reaction of the electrolyte on the surface of each of the positive electrode film and the negative electrode film, so as to make the electrochemical energy storage device has excellent high temperature storage performance and high temperature cycle performance.

公开(公告)号：US20190036169A1

公开(公告)日：2019-01-31

申请号：US16027009

申请日：2018-07-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaomei Wang ,  Chenghua Fu ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0565 ,  H01M4/525 ,  H01M4/505 ,  H01M4/583 ,  H01M10/48

CPC classification number: H01M10/0567 ,  H01G11/64 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0565 ,  H01M10/0569 ,  H01M10/48 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0082

Abstract: The present disclosure provides an electrolyte and an electrochemical energy storage device. The electrolyte comprises an electrolyte salt and an additive. The additive comprises a sulfonic ester cyclic quaternary ammonium salt and a dioxide heterocyclic compound. Under the combined effect of the sulfonic ester cyclic quaternary ammonium salt and the dioxide heterocyclic compound, a dense, uniform and stable passive film on a surface of each of the positive electrode film and the negative electrode film of the electrochemical energy storage device, thereby reducing the contact between the positive, negative electrode active materials and the electrolyte, thus avoiding the occurrence of continuous oxidation and reduction reaction of the electrolyte on the surface of each of the positive electrode film and the negative electrode film, so as to make the electrochemical energy storage device has excellent high temperature storage performance and high temperature cycle performance.

公开(公告)号：US20240347771A1

公开(公告)日：2024-10-17

申请号：US18675164

申请日：2024-05-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  C01B35/12 ,  C01G45/12 ,  C01G53/00 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C01B35/121 ,  C01G45/1228 ,  C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  C01P2002/50 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025

Abstract: Provided is a secondary battery. The secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, an electrolyte, and a separator, where the positive electrode active material contains a transition metal element, and a molar ratio of Mn in the transition metal element, r(Mn), satisfies 0.3≤r(Mn)≤1; and the electrolyte contains an additive selected from at least one of a compound, a compound, and a compound capable of complexing manganese ions, and a compound serving as a lithium salt. A total mass percentage of the compound, compound, and compound in the electrolyte is W1%, where W1% is 0.1% to 5%; a molar ratio C1 (mol/L) of the compound in the electrolyte satisfies 0.2≤C1≤1.5; and r(Mn), C1 and W1% satisfy the following relation: 13≤(100W1%+12C1)/r(Mn)≤20.

公开(公告)号：US20240195016A1

公开(公告)日：2024-06-13

申请号：US18412608

申请日：2024-01-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/489 ,  H01M10/0525 ,  H01M50/42 ,  H01M50/431 ,  H01M50/449

CPC classification number: H01M50/489 ,  H01M50/42 ,  H01M50/431 ,  H01M50/449 ,  H01M10/0525

Abstract: The present application discloses a multi-layer composite separator, a secondary battery and an electrical device containing the same, the multi-layer composite separator including a first substrate layer and a second substrate layer, wherein the multi-layer composite separator further includes a water-scavenging material and an acid-scavenging material, the acid-scavenging material being disposed between the first substrate layer and the second substrate layer, and the water-scavenging material being disposed on at least one surface of the first substrate layer and the second substrate layer. The secondary battery of the present application has high energy density and long service life at the same time.