公开(公告)号：US11894573B2

公开(公告)日：2024-02-06

申请号：US17985813

申请日：2022-11-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Quanguo Li ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin ,  Qian Liu ,  Xia Hu

IPC: H01M10/48 ,  H01M50/342 ,  H01M50/375 ,  H01M10/613

CPC classification number: H01M50/3425 ,  H01M10/486 ,  H01M10/613 ,  H01M50/375 ,  H01M2220/20

Abstract: This application relates to the field of energy storage technologies, and provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell and a second battery cell. The first battery cell includes a first pressure relief mechanism, the second battery cell includes a second pressure relief mechanism, an energy density of the first battery cell is greater than an energy density of the second battery cell, and an area of the first pressure relief mechanism is greater than an area of the second pressure relief mechanism. The apparatus includes the foregoing battery.

公开(公告)号：US11855289B2

公开(公告)日：2023-12-26

申请号：US17563071

申请日：2021-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Yuzhen Zhao ,  Yingjie Guan ,  Yan Wen ,  Qisen Huang

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/62 ,  H01M4/0402 ,  H01M4/364 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application provides a negative electrode active material, a process, a battery, a battery module, a battery pack and an apparatus related to the same. The negative electrode active material comprises a core material and a polymer modified coating on at least a part of a surface of core material; wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere. The present application can reduce damage to the surface structure of the negative electrode active material, reduce loss of active ions and capacity, meanwhile can well improve coulomb efficiency and cycle performance of the battery.

公开(公告)号：US20230352693A1

公开(公告)日：2023-11-02

申请号：US18325016

申请日：2023-05-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M50/46 ,  H01M4/04

CPC classification number: H01M4/667 ,  H01M50/46 ,  H01M4/0404 ,  H01M2004/028

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0

公开(公告)号：US11804637B2

公开(公告)日：2023-10-31

申请号：US17890302

申请日：2022-08-18

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qian Liu ,  Yonghuang Ye ,  Chengdu Liang ,  Haizu Jin

IPC: H01M50/51 ,  H01M50/491 ,  H01M50/446 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M50/451 ,  H01M50/411 ,  H01M50/434 ,  H01M50/489 ,  H01M4/02

CPC classification number: H01M50/51 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M50/411 ,  H01M50/434 ,  H01M50/446 ,  H01M50/451 ,  H01M50/489 ,  H01M50/491 ,  H01M2004/028 ,  H01M2220/20

Abstract: The present application relates to a battery module, comprising a first type of battery cells and a second type of battery cells electrically connected at least in series, wherein the first type of battery cells and the second type of battery cells are battery cells with different chemical systems, the first type of battery cells comprises N first battery cells, the second type of battery cells comprises M second battery cells, N and M are positive integers, the first battery cell comprises a first separator and a first electrolyte, the second battery cell comprises a second separator and a second electrolyte, a kinetic characteristic factor x1 of the first battery cell is: x1=1000×(ε1×r1)/(τ1×t1×θ1), a kinetic characteristic factor x2 of the second battery cell is: x2=1000×(ε2×r2)/(τ2×t2×θ2), and x1 and x2 satisfy: 0.01≤x1/x2≤160.

公开(公告)号：US20230282824A1

公开(公告)日：2023-09-07

申请号：US18186952

申请日：2023-03-21

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haotian Xie ,  Peipei Chen ,  Xin Sun ,  Bangrun Wang ,  Jiantao Huang ,  Xingbu Chen ,  Xiao Chen ,  Na Liu ,  Chengdu Liang

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0568 ,  H01M4/58 ,  H01M4/04 ,  H01M50/207

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0568 ,  H01M4/5825 ,  H01M4/0404 ,  H01M50/207 ,  H01M2004/028

Abstract: A lithium ion secondary battery and a preparation method therefor, a battery module, a battery pack, and a device are provided. In some embodiments, the lithium ion secondary battery comprises a positive electrode plate, a negative electrode plate and an electrolyte, wherein the positive electrode plate comprises a positive electrode active material and a positive electrode lithium-supplementing material comprising a lithium-rich metal oxide, and the lithium-rich metal oxide comprises one or more elements of Ni, Co, Fe, Mn, and Cu; the electrolyte comprises an electrolyte lithium salt and a solvent, and has a percentage ε of the total mass of a fluorine element in the anions of the electrolyte lithium salt relative to the total mass of the electrolyte of

公开(公告)号：US11699812B2

公开(公告)日：2023-07-11

申请号：US17509097

申请日：2021-10-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Jiawei Fu ,  Chengyong Liu ,  Yongsheng Guo ,  Bobing Hu

IPC: H01M10/0562 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  H01M10/0525 ,  H01M2300/0068

Abstract: The present application discloses a sulfide solid electrolyte and a method for the preparation thereof, an all solid state lithium secondary battery, and an apparatus containing the all solid state lithium secondary battery. The sulfide solid electrolyte is obtained by compounding at least Li2S, P2S5 and a dopant MxS2O3, wherein M is one or more selected from Na, K, Ba and Ca, and 1≤x≤2.

公开(公告)号：US11695157B2

公开(公告)日：2023-07-04

申请号：US17583240

申请日：2022-01-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Tiancheng Yi ,  Chunhua Hu ,  Shushi Dou ,  Yao Jiang ,  Chengdu Liang

IPC: H01M10/0567 ,  C01G51/00 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/145 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/0568 ,  H01M4/02

CPC classification number: H01M10/0567 ,  C01G51/006 ,  C01G51/42 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D295/145 ,  C07D403/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  C01P2002/52 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2300/0025

Abstract: This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5≤x1≤1.2, 0.8≤y1≤1.0, 0≤z1≤0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US11621425B2

公开(公告)日：2023-04-04

申请号：US17132173

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Qisen Huang ,  Shiwen Wang

IPC: H01M4/66 ,  H01M4/70 ,  H01M4/02

Abstract: A positive electrode current collector, a positive electrode piece, an electrochemical device and an apparatus, where the positive electrode current collector includes a support layer and a conductive layer provided on the support layer, where a material of the conductive layer is aluminum or aluminum alloy, and a thickness D1 of the conductive layer is 300 nm≤D1≤2 μm; an elongation at break B of the support layer is 10,000%≥B≥12%, and a volume resistivity of the support layer is greater than or equal to 1.0×10−5 Ω·m; when a tensile strain of the positive electrode current collector is 2%, a square resistance growth rate T1 of the conductive layer is T1≤10%. The positive electrode current collector provided in the present application can simultaneously take into account both high safety performance and electrical performance.

公开(公告)号：US20230083168A1

公开(公告)日：2023-03-16

申请号：US18056248

申请日：2022-11-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M4/04 ,  H01M50/46

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0

公开(公告)号：US11539050B2

公开(公告)日：2022-12-27

申请号：US15827214

申请日：2017-11-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/052 ,  H01M4/64 ,  H01M10/0525

Abstract: Provided are a current collector, an electrode plate, a battery and an application of the current collector. The current collector includes an insulation layer and a conductive layer. The insulation layer is configured to bear the conductive layer, the conductive layer is configured to bear an electrode active material layer. A room temperature film resistance RS of the conductive layer meets a conditional expression: 0.016Ω/□≤RS≤420Ω/□. By the current collector of the present application, the short circuit resistance of the battery in case of an abnormal situation causing the short circuit can be greatly increased, and the short circuit current can be greatly reduced. Thus, influence of the short circuit damage on the battery is limited to a point range, and an interrupt in the current only occurs in a point range, without disrupting normal operation of the battery in a certain period time.