公开(公告)号：US20210262066A1

公开(公告)日：2021-08-26

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 ,  H01M4/38 ,  H01M4/36 ,  H01M10/0525

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：US20210210750A1

公开(公告)日：2021-07-08

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

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：US20220158177A1

公开(公告)日：2022-05-19

申请号：US17587504

申请日：2022-01-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shitong CHEN ,  Bin XIE ,  Zhao HU ,  Zhijie GONG ,  Wen LI ,  Lin MA

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/134 ,  H01M4/133 ,  H01M4/587

Abstract: A negative electrode plate, a lithium-ion battery and an apparatus are disclosed. The negative electrode plate includes a negative electrode current collector, a negative electrode active material layer including a negative electrode active material and disposed on at least one surface of the negative electrode current collector, and a lithium-replenishing layer disposed on a surface of the negative electrode active material layer away from the negative current collector. The negative electrode plate can effectively ameliorate the problem of plate heating, and channels formed by the lithium-replenishing region and the gap region can enable the lithium-ion battery to be effectively impregnated with the electrolyte after electrolyte injection is performed to the lithium-ion battery, thereby improving the energy density of the battery while also improving the service life and kinetic performance of the battery.

公开(公告)号：US20220140311A1

公开(公告)日：2022-05-05

申请号：US17575164

申请日：2022-01-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shitong CHEN ,  Zhijie GONG ,  Bin XIE ,  Lin MA

IPC: H01M4/04 ,  H01M4/1395

Abstract: A device for supplementing an electrode sheet with lithium and a method for supplementing electrode sheet with the lithium. The device includes two first rolling wheels, a second rolling wheel, a lithium ribbon providing mechanism, a first transfer film conveying mechanism, a second transfer film conveying mechanism and an electrode sheet providing mechanism; the two first rolling wheels are opposite each other, and the second rolling wheel is adjacent to the first rolling wheel; the lithium ribbon providing mechanism is used for feeding a lithium ribbon between the second rolling wheel and the first rolling wheel; the first transfer film conveying mechanism is used for conveying a first transfer film carrying a first release agent and transferring the first release agent to the lithium ribbon; the electrode sheet providing mechanism is used for providing the electrode sheet.

公开(公告)号：US20220199964A1

公开(公告)日：2022-06-23

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

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：US20220131127A1

公开(公告)日：2022-04-28

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

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：US20210313585A1

公开(公告)日：2021-10-07

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 ,  H01M10/0525 ,  H01M4/75

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 ⁢ % .