Device and method for supplementing electrode sheet with lithium

Patent metadata

Field	Value
Publication number	US-11437608-B2
Application number	US-202217568852-A
Country	US
Kind code	B2
Filing date	Jan 5, 2022
Priority date	Jul 5, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

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.

First claim

What is claimed is:

1. A device for supplementing an electrode sheet with lithium, the electrode sheet comprising a current collector and an active substance layer discontinuously arranged on the surface of the current collector, and the device for supplementing an electrode sheet with lithium comprising a rolling mechanism, an electrode sheet providing mechanism, and a lithium film providing mechanism;
the rolling mechanism comprising two compression rollers;
the electrode sheet providing mechanism located upstream from the two compression rollers, and the electrode sheet providing mechanism configured to provide the electrode sheet between the two compression rollers; and
the lithium film providing mechanism located upstream from the two compression rollers, the lithium film providing mechanism used for providing a lithium film, and the lithium film comprising a transfer film and a lithium foil; wherein
the device for supplementing an electrode sheet with lithium further comprises a strip providing mechanism,
the strip providing mechanism configured to provide a strip between the transfer film and the compression roller on the side corresponding to the same, the strip comprising a substrate and an adhesion layer discontinuously arranged on the substrate, the adhesion layer corresponding to the active substance layer of the electrode sheet; and
the rolling mechanism is used for rolling the strip, the lithium film and the electrode sheet, to make the lithium foil in the lithium film adhere to the active substance layer.

2. The device for supplementing an electrode sheet with lithium according to claim 1 , wherein
the device for supplementing an electrode sheet with lithium further comprises a transfer film collection mechanism,
the transfer film collection mechanism is located downstream from the two compression rollers, and the transfer film collection mechanism is configured to collect the transfer film passing through the two compression rollers.

3. The device for supplementing an electrode sheet with lithium according to claim 1 , wherein
the lithium film providing mechanism comprises a pressing mechanism; the pressing mechanism is configured to make the lithium foil adhere to the transfer film.

4. The device for supplementing an electrode sheet with lithium according to claim 3 , wherein the lithium film providing mechanism further comprises an auxiliary film providing mechanism; the auxiliary film providing mechanism is located upstream from the pressing mechanism, and the auxiliary film providing mechanism is used for providing an auxiliary film to the pressing mechanism.

5. The device for supplementing an electrode sheet with lithium according to claim 4 , wherein the lithium film providing mechanism further comprises an auxiliary film collection mechanism; the auxiliary film collection mechanism is located at the downstream of the pressing mechanism, and the auxiliary film collection mechanism is configured to collect the auxiliary film passing through the pressing mechanism.

6. The device for supplementing an electrode sheet with lithium according to claim 3 , wherein the pressing mechanism comprises a transfer film providing mechanism, a lithium ribbon providing mechanism and two rollers;
the transfer film providing mechanism is configured to provide the transfer film between the two rollers;
the lithium ribbon providing mechanism is configured to provide a lithium ribbon for a space between the two rollers;
and the two rollers is configured to press the lithium ribbon and the transfer film, so as to press the lithium ribbon into the lithium foil, and make the lithium foil adhere to the transfer film to form the lithium film.

7. The device for supplementing an electrode sheet with lithium according to claim 1 , wherein
the strip providing mechanism comprises a strip release mechanism and a strip collection mechanism that are arranged upstream and downstream from the two compression rollers respectively; the strip release mechanism is configured to release the strip to the two compression rollers, and the strip collection mechanism is configured to collect the strip passing through the two compression rollers.

8. The device for supplementing an electrode sheet with the lithium according to claim 1 , wherein the substrate and/or the adhesion layer have/has elasticity.

9. The device for supplementing an electrode sheet with lithium according to claim 1 , wherein
the device for supplementing an electrode sheet with lithium further comprises a lithium supplemented electrode sheet collection mechanism,
the lithium supplemented electrode sheet collection mechanism is located downstream from the two compression rollers, and the lithium supplemented electrode sheet collection mechanism is configured to collect the electrode sheet with the lithium foil adhering to the active substance layer.

10. The device for supplementing an electrode sheet with lithium according to claim 2 , wherein the lithium film providing mechanism, the transfer film collection mechanism and the strip providing mechanism are correspondingly configured to be arranged into one or two sets on the basis that the active substance layer is configured to be arranged on one or two surfaces of the current collector.

11. A method for supplementing an electrode sheet with lithium, the electrode sheet comprising a current collector and an active substance layer discontinuously arranged on the surface of the current collector, wherein the method for supplementing an electrode sheet with lithium comprises:
providing the electrode sheet, a lithium film and a strip in a way that the lithium film is located between the strip and the electrode sheet, wherein the lithium film comprises a transfer film and a lithium foil; the strip comprises a substrate and an adhesion layer discontinuously arranged on the substrate, and the adhesion layer can correspond to the active substance layer of the electrode sheet; and
rolling the strip, the lithium film and the electrode sheet, thereby enabling the lithium foil in the lithium film to adhere to the active substance layer.

12. The method for supplementing an electrode sheet with lithium according to claim 11 , wherein prior to providing the lithium film, the method for supplementing an electrode sheet with lithium further comprises making the lithium foil adhere to the transfer film.

13. The method for supplementing an electrode sheet with lithium according to claim 12 , wherein making the lithium foil adhere to the transfer film comprises:
providing a lithium ribbon, the transfer film and an auxiliary film; and
pressing the lithium ribbon, the transfer film and the auxiliary film so as to press the lithium ribbon into the lithium foil and continuously make the lithium foil adhere to the transfer film to form the lithium film.

14. The method for supplementing an electrode sheet with lithium according to claim 11 , wherein the lithium film, the transfer film and the strip are correspondingly arranged into one or two sets on the basis that the active substance layer is arranged on one or two surfaces of the current collector.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Xie Bin
• Chen Shitong
• Gong Zhijie

Classifications

• H01M4/0435 Primary

  Rolling or calendering · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M2004/027

  Negative electrodes · CPC title