DEVICE AND METHOD FOR PREPARING CURRENT COLLECTOR ASSEMBLY

1 . A device for preparing a current collector assembly, comprising:

a first feeding apparatus configured to provide a transfer film, the transfer film having a base layer and a metal layer formed on the base layer;

a second feeding apparatus configured to provide a bottom film, the bottom film having a first surface and a second surface opposite to the first surface;

a coating apparatus configured to apply an adhesive on the first surface to obtain a base film; and

a transfer apparatus configured to transfer the metal layer to the base film to obtain the current collector assembly.

2 . The device according to claim 1 , wherein the base layer is a release film.

3 . The device according to claim 1 , wherein the bottom film is a polymeric film.

4 . The device according to claim 1 , wherein the transfer apparatus transfers the metal layer to the base film by mechanical peeling.

5 . The device according to claim 4 , wherein the transfer apparatus comprises:

a pressure roller and a first roller, the pressure roller and the first roller rolling the transfer film and the base film so that the metal layer is transferred to the base film.

6 . The device according to claim 4 , wherein the transfer apparatus comprises:

a heating roller and a second roller, the heating roller and the second roller heating and rolling the transfer film and the base film so that the metal layer is transferred to the base film.

7 . The device according to claim 1 , wherein the first feeding apparatus and the second feeding apparatus have the same structure.

8 . The device according to claim 7 , wherein the first feeding apparatus comprises:

a first unwinding roll configured to convey the transfer film in a first feeding direction;

a first winding roll configured to collect the transfer film after passing through the transfer apparatus; and

at least one first guide roller arranged between the first unwinding roll and the first winding roll in the first feeding direction, the first guide roller being configured to support the transfer film, so that the transfer film is transported according to an arrangement path of the first guide roller.

9 . The device according to claim 7 , wherein the second feeding apparatus comprises:

a second unwinding roll configured to convey the bottom film in a second feeding direction;

a second winding roll configured to collect the current collector assembly; and

at least one second guide roller arranged between the second unwinding roll and the second winding roll in the second feeding direction, the second guide roller being configured to support the bottom film or the current collector assembly so that the bottom film or the current collector assembly is transported according to an arrangement path of the second guide roller.

10 . The device according to claim 8 , wherein the device is an integrated device.

11 . A method for preparing a current collector assembly, comprising:

providing a transfer film, the transfer film having a base layer and a metal layer formed on it;

providing a bottom film, the bottom film having a first surface and a second surface opposite to the first surface;

applying an adhesive on the first surface to obtain a base film; and

transferring the metal layer to the base film to form the current collector assembly.

12 . The method according to claim 11 , wherein the transfer film is obtained by electroplating the metal layer on the base layer.

13 . The method according to claim 11 , wherein the transfer film is obtained by evaporating the metal layer onto the base layer.

14 . The method according to claim 11 , wherein the base layer is a release film.

15 . The method according to claim 11 , wherein the bottom film is a polymeric film.

16 . The method according to claim 11 , wherein transferring the metal layer to the base film comprises:

transferring the metal layer to the base film by mechanical peeling.

17 . The method according to claim 16 , wherein transferring the metal layer to the base film by mechanical peeling comprises:

rolling the transfer film and the base film so that the metal layer is transferred to the base film.

18 . The method according to claim 16 , wherein transferring the metal layer to the base film comprises:

heating and rolling the transfer film and the base film so that the metal layer is transferred to the base film.

19 . The method according to claim 11 , wherein providing the transfer film comprises:

providing the transfer film through a first feeding apparatus.

20 . The method according to claim 11 , wherein providing the bottom film comprises:

providing the bottom film through a second feeding apparatus.