公开(公告)号：US11261509B2

公开(公告)日：2022-03-01

申请号：US17244976

申请日：2021-04-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhijie Gong ,  Bin Xie ,  Shitong Chen

IPC: C22C24/00 ,  C21D8/02 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/40 ,  B21B1/40

Abstract: The present embodiments provide a metal lithium strip, a prelithiated electrode plate, and a prelithiation process. The metal lithium strip comprises a lithium substrate and a metal element doped in the lithium substrate, the metal element comprises at least two of magnesium, boron, aluminum, silicon, indium, zinc, silver, calcium, manganese and sodium; and the metal lithium strip has a strength a, a width w, and a thickness h, satisfying: σ2-(w/105h)2>0. In the present application, the strength of the lithium strip is adjusted by the doping of the metal elements; meanwhile, the strength of the adjusted lithium strip is matched with its width and thickness ensuring that in the process of rolling the metal lithium strip to a reasonable thickness, the phenomenon of edge cracking of the lithium strip is avoided, lithium metal resources and production costs can be saved, a uniform pre-lithiation effect for electrode plate can also be achieved.

公开(公告)号：US11777085B2

公开(公告)日：2023-10-03

申请号：US17057290

申请日：2020-04-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shitong Chen ,  Bin Xie ,  Zhijie Gong ,  Zhao Hu ,  Lin Ma

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

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M2004/027

Abstract: The application relates to the field of lithium ion battery technology and, more particularly, relates to a lithium-supplement layer and its negative electrode sheet, a lithium ion battery and a device. The lithium-supplement layer is formed by connecting a transition layer, an oxide layer and a surface layer in sequence, the surface layer contains an appropriate amount of an organic material and a filling substance, which can reduce a winding temperature of the negative electrode sheet, the oxide layer substance in the lithium-supplement layer is used to provide an additional lithium source, after injection, the lithium source can be continuously supplemented during the cycle process to improve the activity of a lithium layer, at the same time, the filling substance contained in the surface layer can effectively play a role of restraining the expansion of an active substance, and improve the battery cycle performance.

公开(公告)号：US12046741B2

公开(公告)日：2024-07-23

申请号：US17568344

申请日：2022-01-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bin Xie ,  Shitong Chen ,  Zhijie Gong

IPC: H01M4/04 ,  H01M4/139 ,  H01M10/0585

CPC classification number: H01M4/0435 ,  H01M4/139 ,  H01M10/0585

Abstract: The lithium film forming mechanism includes a first separator providing mechanism, a second separator providing mechanism, a lubricating substance applying mechanism, a lithium ribbon providing mechanism and two rollers; the first separator providing mechanism provides a first separator for the two rollers; the second separator providing mechanism provides a second separator for the two rollers; the lithium ribbon providing mechanism locates a lithium ribbon between the first separator and the second separator and provides the lithium ribbon for the two rollers; the lubricating substance applying mechanism applies lubricating substances to surfaces, facing the lithium ribbon, of the first separator and/or the second separator before entering the space between the two rollers; and the two rollers roll the first separator, the lithium ribbon and the second separator, to roll the lithium ribbon into lithium foil and make the lithium foil adhere to the second separator to form the lithium film.

公开(公告)号：US11437608B2

公开(公告)日：2022-09-06

申请号：US17568852

申请日：2022-01-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bin Xie ,  Shitong Chen ,  Zhijie Gong

IPC: H01M4/04 ,  H01M4/1395 ,  H01M4/02

Abstract: The present application provides a device and method for supplementing electrode sheet with lithium. The device for supplementing electrode sheet with lithium includes a rolling mechanism, an electrode sheet providing mechanism, a lithium film providing mechanism and a strip providing mechanism; the rolling mechanism includes two compression rollers; the electrode sheet providing mechanism is used for providing the electrode sheet; the lithium film providing mechanism is used for providing a lithium film, and the lithium film includes a transfer film and a lithium foil, and the lithium foil continuously adheres to the transfer film; the strip providing mechanism is used for providing a strip, and the strip includes a substrate and an adhesion layer, and the adhesion layer can correspond to the active substance layer of the electrode sheet; the rolling mechanism makes the lithium foil adhere to the active substance layer.

公开(公告)号：US11223050B2

公开(公告)日：2022-01-11

申请号：US17345134

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bin Xie ,  Shitong Chen ,  Zhijie Gong

IPC: H01M4/66 ,  H01M4/75 ,  H01M10/0525

Abstract: The present application provide a spliced lithium strip, preparation method thereof, and related negative electrode plate, battery core, lithium ion battery, battery module, battery pack and apparatus. The spliced lithium strip is formed by splicing two or more base lithium strips, wherein the base lithium strip has a thickness fluctuation of less than 5%; the spliced lithium strip has a spliced area and a non-spliced area alternately distributed along the splicing direction, and the spliced area has a maximum thickness H and the non-spliced area has a minimum thickness L, satisfying  H - L  L × 1 ⁢ 0 ⁢ 0 ⁢ % ≤ 6 ⁢ % .