Apparatus, process, and roller for forming electrode plate

Patent metadata

Field	Value
Publication number	US-12418016-B2
Application number	US-202318488064-A
Country	US
Kind code	B2
Filing date	Oct 17, 2023
Priority date	Oct 20, 2021
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Provided are an apparatus, process, and roller for forming electrode plate. The apparatus for forming electrode plate includes a first roller and a second roller. An inner cavity of a cylinder of the first roller is provided with a gas outlet structure, the gas outlet structure is connected to a gas supply apparatus, and surface of the cylinder of the first roller is provided with a circumferentially distributed cylinder gas discharge structure. The second roller is disposed opposite the first roller, and a gap is provided between the first roller and the second roller for rolling an electrode material into an electrode film.

First claim

The invention claimed is:

1. An apparatus for forming an electrode plate, comprising:
a first roller and a second roller disposed opposite to each other, the first roller and the second roller forming a gap to facilitate an electrode material to enter the gap and to be rolled into an electrode film, wherein
the first roller has a cylinder and an inner cavity of the cylinder, the cylinder of the inner cavity is provided with a gas outlet structure, a surface of the cylinder of the first roller being provided with a circumferentially distributed cylinder gas discharge structure, the cylinder gas discharge structure comprises a plurality of gas discharge vents, the gas outlet structure is connected to a gas supply apparatus, the gas outlet structure is in fluid communication with the cylinder gas discharge structure, the gas outlet structure has holes dispersed on the inner cavity of the cylinder to facilitate the gas to be uniformly discharged from the surface of the cylinder of the first roller through the circumferentially distributed cylinder gas discharge structure;
the first roller further comprises a first roller shaft having a hollow structure, the first roller shaft is removably inserted through the inner cavity of the cylinder of the first roller, a surface of the first roller shaft is provided with a circumferentially distributed roller shaft gas discharge structure comprising a plurality of gas discharge vents, an inner cavity of the first roller shaft is provided with a gas supply port, and the gas supply port is connected to the roller shaft gas discharge structure and the gas supply apparatus, a gas supplied by the gas supply apparatus to the gas supply port sequentially passes through the circumferentially distributed roller shaft gas discharge structure and the circumferentially distributed cylinder gas discharge structure to be discharged from the surface of the cylinder of the roller,
the first roller further comprises two bearings and two bearing sealing disks, the two bearings are sleeved on the first roller shaft and respectively disposed on two ends of the first roller shaft, two ends of the cylinder of the first roller are detachably connected to the two ends of the first roller shaft via the two bearings respectively, when the first roller shaft rotates, the two bearings drive the cylinder of the first roller to simultaneously rotate, the two bearing sealing disks are sleeved on the first roller shaft and respectively disposed on the two ends of the first roller shaft and corresponding to the two bearings, the two bearing sealing disks are configured to avoid sliding of the bearings relative to the cylinder during rotation,
a ratio of a total opening area of the gas discharge vents of the roller shaft gas discharge structure to a total opening area of the gas discharge vents of the cylinder gas discharge structure is greater than or equal to 1.05 and less than or equal to 1.5.

2. The apparatus for forming an electrode plate according to claim 1 , wherein the cylinder of the first roller and the first roller shaft are hermetically sealed with an elastic sealing element.

3. The apparatus for forming an electrode plate according to claim 1 , further comprising:
a third roller disposed opposite the second roller, a gap being formed between the second roller and the third roller for rolling the electrode film and a substrate into a laminated electrode plate; and
a substrate delivery assembly configured to deliver the substrate into the gap between the second roller and the third roller.

4. The apparatus for forming an electrode plate according to claim 3 , wherein the first roller and the second roller are horizontally arranged side by side, and the third roller and the second roller are horizontally arranged side by side or vertically arranged.

5. The apparatus for forming an electrode plate according to claim 1 , further comprising:
two roller sets, either of the two roller sets comprising one such first roller and one such second roller, the two roller sets being arranged in mirror symmetry, the two second rollers in the two roller sets being disposed opposite each other in the center, and a gap being formed between the two second rollers for rolling the electrode film simultaneously on both sides of a substrate into a laminated electrode plate; and
a substrate delivery assembly configured to deliver the substrate into the gap between the two second rollers.

6. The apparatus for forming an electrode plate according to claim 5 , wherein the two first rollers and the two second rollers in the two roller sets are horizontally arranged side by side.

7. The apparatus for forming an electrode plate according to claim 1 , further comprising:
a feeding assembly configured to supply the electrode material into the gap between the first roller and the second roller.

8. A roller for forming an electrode plate, the roller comprising:
a cylinder and a roller shaft, wherein,
the cylinder has an inner cavity of the cylinder, the cylinder of the inner cavity is provided with a gas outlet structure, a surface of the cylinder of the roller being provided with a circumferentially distributed cylinder gas discharge structure, the cylinder gas discharge structure comprises a plurality of gas discharge vents, the gas outlet structure is connected to a gas supply apparatus, the gas outlet structure is in fluid communication with the cylinder gas discharge structure, the gas outlet structure has holes dispersed on the inner cavity of the cylinder to facilitate the gas to be uniformly discharged from the surface of the cylinder of the roller through the circumferentially distributed cylinder gas discharge structure,
the roller shaft is removably inserted through the inner cavity of the cylinder of the roller and has a hollow structure, a surface of the roller shaft is provided with a circumferentially distributed roller shaft gas discharge structure comprising a plurality of gas discharge vents, an inner cavity of the roller shaft is provided with a gas supply port, and the gas supply port is connected to the roller shaft gas discharge structure and the gas supply apparatus, a gas supplied by the gas supply apparatus to the gas supply port sequentially passes through the circumferentially distributed roller shaft gas discharge structure and the circumferentially distributed cylinder gas discharge structure to be discharged from the surface of the cylinder of the roller,
the roller further comprises two bearings and two bearing sealing disks, the two bearings are sleeved on the roller shaft and respectively disposed on two ends of the roller shaft, two ends of the cylinder of the roller are detachably connected to the two ends of the roller shaft via the two bearings respectively, when the roller shaft rotates, the two bearings drive the cylinder of the roller to simultaneously rotate, the two bearing sealing disks are sleeved on the roller shaft and respectively disposed on the two ends of the roller shaft and corresponding to the two bearings, the two bearing sealing disks are configured to avoid sliding of the bearings relative to the cylinder during rotation,
a ratio of a total opening area of the gas discharge vents of the roller shaft gas discharge structure to a total opening area of the gas discharge vents of the cylinder gas discharge structure is greater than or equal to 1.05 and less than or equal to 1.5.

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Jia Hai
• Li Shisong
• Deng Kaiming
• Lu Lei
• Wang yalong
• Wang Ruochen

Classifications

• B29C43/46 Primary

  Rollers · CPC title

• B29C43/24

  Calendering · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/0435 Primary

  Rolling or calendering · CPC title