公开(公告)号：US11121367B2

公开(公告)日：2021-09-14

申请号：US15577290

申请日：2017-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Rui Du ,  Na Liu ,  Yongchao Liu ,  Sihui Wang ,  Zhongling Xu ,  Chao Yang

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M4/58 ,  H01M4/485 ,  H01M4/36 ,  H01M4/139 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/50 ,  H01M4/62 ,  H01M4/02

Abstract: The disclosure provides a modified positive electrode active material, a preparation method thereof, and an electrochemical energy storage device. The modified positive electrode active material comprises positive electrode active material substrate; first oxide layer, coated on the surface of the positive electrode active material substrate and selected from one or more of oxides of element M being selected from the group of one or more of Li, Al, Zr, Mg, Ti, Y, Si, Ca, Cr, Fe, Zn, Nb, Sn, Ba, and Cd; and second oxide layer having a continuous layered structure, coated on the surface of the first oxide layer and selected from one or more of oxides of element M′ being selected from one or more of Li, B, P, As, Pb, V, Mo, and Sn. High temperature storage performance and cycling performance of electrochemical energy storage device are improved by the modified positive electrode active material.

公开(公告)号：US11777072B2

公开(公告)日：2023-10-03

申请号：US17137047

申请日：2020-12-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhiyang Wu ,  Wang Zhang ,  Shisong Li ,  Chao Guo ,  Chao Yang

IPC: H01M4/04 ,  B05C11/02

CPC classification number: H01M4/0435 ,  B05C11/025

Abstract: This application discloses an electrode plate rolling apparatus and an electrode plate rolling method that are configured to roll an electrode plate. The electrode plate includes a coated region and an uncoated region. The electrode plate rolling apparatus includes a roller group, a heating part, and a cooling part. The heating part is configured to heat the electrode plate, and the cooling part is configured to cool the electrode plate. The heating part further includes an extension assembly, and the extension assembly can extend the uncoated region when the heating part heats the electrode plate. The electrode plate passes through the cooling part after passing through the heating part. The heating part and the cooling part are configured to reduce a difference between an extensibility parameter of the uncoated region and an extensibility parameter of the coated region.

公开(公告)号：US11476492B2

公开(公告)日：2022-10-18

申请号：US17058463

申请日：2020-06-02

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Yiruo Wang ,  Chao Yang ,  Minghao Tang ,  Xiao Wang ,  Jiang Lin ,  Chuangchuang Xiang

IPC: H01M10/04

Abstract: The present application relates to a device for preparing an electrode assembly and a preparation method of the electrode assembly. Wherein the device for preparing the electrode assembly includes: a winding assembly; a plurality of first electrode plate unwinding apparatuses, configured to provide a plurality of first electrode plates for the winding assembly; and at least one second electrode plate unwinding apparatus, configured to provide at least one second electrode plate for the winding assembly, wherein a polarity of the first electrode plate is opposite to a polarity of the second electrode plate; and wherein the winding assembly is configured to wind the plurality of first electrode plates and the at least one second electrode plate, to form an electrode assembly. The present application is used for improving winding efficiency of the electrode assembly.

公开(公告)号：US11108109B2

公开(公告)日：2021-08-31

申请号：US17139801

申请日：2020-12-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaoyu Chen ,  Jiang Lin ,  Xiang Fan ,  Chao Yang ,  Hongxin Fang

IPC: H01M50/166 ,  H01M50/15

Abstract: The present application relates to the technical field of battery and provides a device for press-fitting a battery top cover. The device for press-fitting a battery top cover comprises a press-fitting body. The press-fitting body 1 is arranged on one side of the battery top cover facing away from a battery housing. A pneumatic cleaning assembly is arranged on one side of the press-fitting body facing the battery top cover. The pneumatic cleaning assembly is arranged to allow the chips to move out of the battery housing together with gas along a gap between the battery housing and the battery top cover. In the present application, the pneumatic cleaning assembly is arranged to allow the chips to move out of the battery housing together with gas along the gap between the battery housing and the battery top cover under the action of the gas flow so that to keep the inside of the battery housing clean, avoid short circuit in the battery caused by the chips, and improve the safety performance of the battery.

公开(公告)号：US20210126309A1

公开(公告)日：2021-04-29

申请号：US17139801

申请日：2020-12-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaoyu CHEN ,  Jiang Lin ,  Xiang Fan ,  Chao Yang ,  Hongxin Fang

IPC: H01M50/166 ,  H01M50/15

Abstract: The present application relates to the technical field of battery and provides a device for press-fitting a battery top cover. The device for press-fitting a battery top cover comprises a press-fitting body. The press-fitting body 1 is arranged on one side of the battery top cover facing away from a battery housing. A pneumatic cleaning assembly is arranged on one side of the press-fitting body facing the battery top cover. The pneumatic cleaning assembly is arranged to allow the chips to move out of the battery housing together with gas along a gap between the battery housing and the battery top cover. In the present application, the pneumatic cleaning assembly is arranged to allow the chips to move out of the battery housing together with gas along the gap between the battery housing and the battery top cover under the action of the gas flow so that to keep the inside of the battery housing clean, avoid short circuit in the battery caused by the chips, and improve the safety performance of the battery.

公开(公告)号：US11088424B2

公开(公告)日：2021-08-10

申请号：US16555029

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaorong Liu ,  Bin Zhao ,  Chao Yang ,  Zonghuo Chen ,  Anwei Wu ,  Zhiguang Qu

IPC: H01M2/26 ,  H01M2/10 ,  H01M2/20 ,  H01M50/531 ,  H01M50/20 ,  H01M50/209 ,  H01M50/502

Abstract: The present disclosure relates to a battery module comprising a first battery unit and a second battery unit, each of which comprises N secondary batteries, N is an integer greater than or equal to 2, and each secondary battery comprises a first electrode lead and a second electrode lead having opposite polarities. The first electrode lead has a melting point higher than that of the second electrode lead, and N first electrode leads of the first battery unit and N second electrode leads of the second battery unit are arranged to form a layered construction. The battery module has a plurality of connection points distributed in the layered construction, the number of which is greater than or equal to N, and each connection point is adapted to electrically connect one first electrode lead of the first battery unit to at least one second electrode lead of the second battery unit.

公开(公告)号：US10581058B2

公开(公告)日：2020-03-03

申请号：US15868968

申请日：2018-01-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wenfa Lin ,  Yuqian Wen ,  Chao Yang ,  Lei Zhang

IPC: H01M2/36 ,  H01M2/04 ,  H01M2/12 ,  H01M10/0525 ,  B23K101/36

Abstract: A welding assembly for a liquid-injection hole of a secondary battery, including a top cover of a case, a liquid-injection hole, a sealing cover-plate and a stress release structure, wherein the liquid-injection hole is disposed in the top cover and includes a assembling recess and a through-hole arranged sequentially from top to bottom of the top cover, the assembling recess and the through-hole present a stepped transition and the radial dimension of the assembling recess is larger than that of the through-hole. The sealing cover-plate is accommodated in the assembling recess and the stress release structure is provided at one or both sides of the welding portion and capable of releasing stress from the welding portion. The welding assembly provides a stress release structure nearby the welding portion, and when the welding portion is full-strength welded, the stress-release structure can effectively release stress nearby the welding seam.

公开(公告)号：US20200243831A1

公开(公告)日：2020-07-30

申请号：US16555029

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaorong Liu ,  Bin Zhao ,  Chao Yang ,  Zonghuo Chen ,  Anwei Wu ,  Zhiguang Qu

IPC: H01M2/26 ,  H01M2/10 ,  H01M2/20

Abstract: The present disclosure relates to a battery module comprising a first battery unit and a second battery unit, each of which comprises N secondary batteries, N is an integer greater than or equal to 2, and each secondary battery comprises a first electrode lead and a second electrode lead having opposite polarities. The first electrode lead has a melting point higher than that of the second electrode lead, and N first electrode leads of the first battery unit and N second electrode leads of the second battery unit are arranged to form a layered construction. The battery module has a plurality of connection points distributed in the layered construction, the number of which is greater than or equal to N, and each connection point is adapted to electrically connect one first electrode lead of the first battery unit to at least one second electrode lead of the second battery unit.