公开(公告)号：US20220367968A1

公开(公告)日：2022-11-17

申请号：US17815570

申请日：2022-07-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu Jin ,  Hu Xu ,  Yuqun Zeng ,  Chengdu Liang

IPC: H01M50/342 ,  H01M50/213 ,  H01M50/249 ,  H01M50/375

Abstract: A battery, an electrical device, and a method and device for manufacturing a battery are provides. In some embodiments, the battery includes: a plurality of battery cells arranged along a first direction. Each battery cell includes an end cap and a housing, an opening is made at an end of the housing along the first direction, the end cap is configured to close the opening, and the housing includes a first wall extending along the first direction. A pressure relief region is provided on the first wall. The pressure relief region is configured to release pressure along a second direction when an internal pressure or temperature of the battery cell reaches a threshold. The second direction intersects the first direction. In this way, various embodiments improve safety of the battery.

公开(公告)号：US11476457B2

公开(公告)日：2022-10-18

申请号：US17586754

申请日：2022-01-27

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/02

Abstract: The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900 cm−1˜960 cm−1, 1300 cm−1˜1380 cm−1 and 1520 cm−1˜1590 cm−1, respectively, in which the scattering peak at the Raman shift of 900 cm−1˜960 cm−1 has a peak intensity recorded as Il, the scattering peak at the Raman shift of 1520 cm−1˜1590 cm−1 has a peak intensity recorded as IG, and Il and IG satisfy 0.2≤Il/IG≤0.8.

公开(公告)号：US11342547B2

公开(公告)日：2022-05-24

申请号：US16235625

申请日：2018-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shiwen Wang ,  Qisen Huang ,  Huafeng Huang ,  Chengdu Liang

IPC: H01M4/00 ,  H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/1397 ,  H01M4/136 ,  H01M50/46 ,  H01M10/0525 ,  H01M4/02 ,  H01M10/052

Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.

公开(公告)号：US20220149495A1

公开(公告)日：2022-05-12

申请号：US17586288

申请日：2022-01-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Qinglin Bai ,  Yanan Cai ,  Hongbo Ding

IPC: H01M50/586 ,  H01M50/147 ,  H01M50/463 ,  H01M50/547 ,  H01M10/04

Abstract: Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.

公开(公告)号：US11309582B2

公开(公告)日：2022-04-19

申请号：US16342852

申请日：2017-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yao Jiang ,  Chunhua Hu ,  Tiancheng Yi ,  Lu Miao ,  Chengdu Liang

IPC: H01M10/00 ,  H01M10/0567 ,  C07D295/15 ,  C07D317/38 ,  C07D327/10 ,  H01G11/64 ,  H01M10/0525 ,  H01G11/06

Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.

公开(公告)号：US11264646B2

公开(公告)日：2022-03-01

申请号：US16342400

申请日：2017-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lu Miao ,  Chunhua Hu ,  Tiancheng Yi ,  Yao Jiang ,  Chengdu Liang

IPC: H01M10/0567 ,  H01G11/06 ,  H01G11/64 ,  H01M6/16 ,  H01M10/0525

Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.

公开(公告)号：US11264613B2

公开(公告)日：2022-03-01

申请号：US17144455

申请日：2021-01-08

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

Abstract: The present application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolytic solution. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1. A negative active material in the negative electrode sheet includes one or more of Si, SiOx2, a Si/C composite material, and a Si alloy. The electrolytic solution contains an additive A and an addictive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is a halogen-substituted cyclic carbonate compound. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.

公开(公告)号：US11258099B2

公开(公告)日：2022-02-22

申请号：US17130307

申请日：2020-12-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolytic solution, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive electrode active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, and the positive electrode active material is a mixture of large particles Lix1Coy1M1-y1O2-z1Qz1 and small particles Lix1Coy1M1-y1O2-z1Qz1; an average particle size D50 of the large particles Lix1Coy1M1-y1O2-z1Qz1 is 10 μm-17 μm, and an average particle size D50 of the small particles Lix1Coy1M1-y1O2-z1Qz1 is 2 μm-7 μm. The electrolytic solution 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：US11239500B2

公开(公告)日：2022-02-01

申请号：US17056740

申请日：2019-12-13

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0567 ,  C07D239/04 ,  C07D251/04 ,  C07F9/09 ,  C07F9/141 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

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

公开(公告)号：US11152624B2

公开(公告)日：2021-10-19

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.