KR-20260065539-A - PRE-CALENDERING SYSTEM FOR REDUCING STRAIN IMBALANCES IN MULTILANE ELECTRODES

Abstract

Generally speaking, one or more aspects of the present disclosure relate to methods, systems, and devices for pre-deforming the bare lanes of a multi-lane electrode, and a system for calendering a multi-lane electrode comprises a pre-deformation roll device comprising a plurality of pre-deformation rollers and a pressure roller forming a pre-deformation nip, and a calendering roll device comprising a pair of calendering rollers forming a calendering nip located downstream from the pre-deformation roll device.

Inventors

• 렌, 지항
• 이글스톤, 보네
• 왕, 카이핑
• 장, 춘레이

Assignees

• 테슬라, 인크.

Dates

Publication Date

20260508

Application Date

20251028

Priority Date

20241101

Claims (20)

1. In a system for calendering multi-lane electrodes, A pre-deformation roll device comprising a plurality of pre-deformation rollers and a pressure roller, wherein the plurality of pre-deformation rollers and the pressure roller form a pre-deformation nip; A calendar roll device comprising a pair of calendaring rollers forming a calendaring nip located downstream from the above-mentioned pre-deformed roll device; and A multi-lane electrode comprising a plurality of electrode films and a plurality of exposed lanes located within the pre-deformed nib and the calendering nib, and Each of the plurality of pre-deformation rollers is positioned adjacent to a portion of one of the plurality of exposed lanes; A system configured such that the plurality of pre-deformed rollers apply force to the plurality of exposed lanes.
2. In a system for calendering multi-lane electrodes, A pre-deformation roll device comprising a plurality of pre-deformation rollers and a pressure roller, wherein the plurality of pre-deformation rollers and the pressure roller form a pre-deformation nip; and A system comprising a calendar roll device including a pair of calendaring rollers forming a calendaring nip located downstream from the above-mentioned pre-deformed roll device.
3. A system according to paragraph 2, further comprising a multi-lane electrode comprising a plurality of electrode films and a plurality of exposed lanes located within the pre-deformed nib and the calendering nib.
4. A system comprising, in paragraph 2, a driving pressure roller in contact with the pressure roller.
5. A system according to paragraph 2, wherein the plurality of pre-deformation rollers are configured to be driven by the pressure roller.
6. A system according to paragraph 2, wherein the pressure roller is configured to press the plurality of pre-deformed rollers with a pressure of at least 0.11 T/mm.
7. In paragraph 2, the system is configured such that the calendar roll device provides a pressure of at least 0.25 T/mm.
8. A system according to paragraph 2, wherein each of the pair of pre-deformed rollers comprises a cylindrical surface positioned tangentially to the cylindrical surface of the pressure roller.
9. In claim 8, a system wherein each of the pair of pre-deformed rollers comprises a chamfer at each end of the cylindrical surface.
10. In paragraph 2, the above pair of pre-deformed rollers are heated in the system.
11. In paragraph 2, the system wherein the plurality of pre-deformed rollers comprises a stainless steel alloy material.
12. In paragraph 2, a system wherein each of the pair of pre-deformed rollers comprises a surface coating.
13. A method for manufacturing a multilane electrode for an energy storage device, A step of pre-deforming a multilane electrode comprising a plurality of exposed lanes and a plurality of electrode films, wherein the step of pre-deforming the multilane electrode includes a step of deforming the plurality of exposed lanes to form a pre-deformed multilane electrode; and A method comprising the step of calendering the pre-deformed multi-lane electrode to form a deformed balanced multi-lane electrode.
14. In claim 13, the method further comprises a plurality of ceramic-coated portions positioned between each electrode film of the plurality of electrode films and each exposed lane of the plurality of exposed lanes.
15. In paragraph 13, the step of calendering the pre-deformed multi-lane electrode occurs from the first end to the second end of the pre-deformed multi-lane electrode, a method.
16. In paragraph 13, the method wherein the deformation-balanced multilane electrode comprises a camber of at most 0.4 cm/m.
17. A method according to claim 13, further comprising the step of forming the multilane electrode.
18. In claim 17, the method wherein the multi-lane electrode is formed through a wet process.
19. In claim 17, the method wherein the multi-lane electrode is formed through a dry process.
20. In a method for forming a plurality of electrodes, Step of performing the above method of paragraph 13; and A method comprising the step of cutting along the length of each exposed lane to form a plurality of electrodes.

Description

Pre-calendering system for reducing strain imbalances in multilane electrodes Integration by reference to any priority applications This application claims the benefit of priority to U.S. Patent Application No. 18/935,281, filed November 1, 2024, titled “Pre-calendering system for reducing strain imbalances in multi-lane electrodes,” which is incorporated by reference, for all purposes and in its entirety. field The present disclosure relates to devices, systems, and methods for calendering electrodes. More specifically, the present disclosure relates to pre-deforming a multi-lane electrode prior to calendering the multi-lane electrode. Explanation of related fields Electrodes can be produced using wet or dry electrode fabrication processes. Conventional wet electrode processes involve mixing a slurry, coating the slurry onto a foil, drying the slurry on the foil, and subsequently calendering the electrode. Electrodes can also be produced using a dry electrode process by calendering a dry electrode film onto a foil. The calendering process may be prone to introducing electrode camber and causing quality issues such as wrinkling. Accordingly, there is a need for devices, systems, and methods to reduce quality problems during the production of electrodes. For the purpose of summarizing the advantages achieved over the invention and the prior art, specific objects and advantages of the invention are described herein. Not all such objects or advantages may be achieved in any specific embodiment of the invention. Accordingly, for example, those skilled in the art will recognize that the invention may be implemented or performed in a manner that achieves or optimizes one or a group of advantages as taught herein, without necessarily achieving other objects or advantages as taught or suggested herein. In some embodiments, a system for calendering a multilane electrode is described. The system comprises a pre-deformation roll device comprising a plurality of pre-deformation rollers and a pressure roller, wherein the plurality of pre-deformation rollers and the pressure roller form a pre-deformation nip; and a calendering roll device comprising a pair of calendering rollers forming a calendering nip located downstream from the pre-deformation roll device; a multilane electrode comprising a plurality of electrode films and a plurality of bare lanes located within the pre-deformation nip and the calendering nip; wherein each of the pre-deformation rollers is located adjacent to a portion of one of the bare lanes; and the plurality of pre-deformation rollers are configured to apply force to the bare lanes. In some embodiments, a system for calendering a multilane electrode is described. The system comprises a pre-deformation roll device comprising a plurality of pre-deformation rollers and a pressure roller, wherein the plurality of pre-deformation rollers and the pressure roller form a pre-deformation nip; and a calendering roll device comprising a pair of calendering rollers forming a calendering nip located downstream from the pre-deformation roll device. In some embodiments, the system further comprises a multi-lane electrode comprising a plurality of electrode films and a plurality of exposed lanes located within a pre-deformation nib and a calendering nib. In some embodiments, the system further comprises a driving pressure roller in contact with a pressure roller. In some embodiments, a plurality of pre-deformation rollers are configured to be driven by the pressure roller. In some embodiments, the pressure roller is configured to press the plurality of pre-deformation rollers with a pressure of at least about 0.11 T/mm. In some embodiments, the calender roll device is configured to provide a pressure of at least about 0.25 T/mm. In some embodiments, each of the pre-deformation rollers comprises a cylindrical surface located tangentially to the cylindrical surface of the pressure roller. In some embodiments, each of the pre-deformation rollers comprises a chamfer at each end of the cylindrical surface. In some embodiments, the pre-deformation rollers are heated. In some embodiments, the plurality of pre-deformation rollers comprise a stainless steel alloy material. In some embodiments, the pre-deformation rollers comprise a surface coating. In some embodiments, a method for manufacturing a multilane electrode for an energy storage device is described. The method comprises the steps of pre-deforming a multilane electrode comprising a plurality of exposed lanes and a plurality of electrode films, wherein the step of pre-deforming the multilane electrode comprises deforming a plurality of exposed lanes to form a pre-deformed multilane electrode; and calendering the pre-deformed multilane electrode to form a deformation-balanced multilane electrode. In some embodiments, the multilane electrode further comprises a plurality of ceramic-coated portions positioned between each electrode film of a plurality of electrode