Method for cutting a continuous battery electrode material in order to produce battery electrodes, and a battery electrode

Patent metadata

Field	Value
Publication number	US-12202074-B2
Application number	US-201917293534-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Nov 16, 2018
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A method for cutting a continuous battery electrode material in order to produce battery electrodes includes providing a continuous battery electrode material and providing a transport device which is designed to move the continuous battery electrode material in a movement direction from a starting point to an end point over a machining region, wherein the transport device comprises at least two transport units. Additionally, at least one cutting device is provided. The continuous battery electrode material is then machined while being moved in the movement direction by means of the at least one cutting device such that at least one machining step is carried out on the continuous battery electrode material. At least one dimension of at least one of the at least two transport units is smaller than at least one dimension of the continuous battery electrode material at least in one region.

First claim

The invention claimed is:

1. A method for cutting a continuous battery electrode material in order to produce battery electrodes, comprising the following steps:
providing a continuous battery electrode material;
providing a transport device which is designed to move the continuous battery electrode material in a movement direction from a starting point to an end point over a machining region, the transport device comprising at least two transport units, wherein the at least two transport units are provided in the form of conveyor belts;
providing at least one cutting device which is designed to machine the continuous battery electrode material;
machining the continuous battery electrode material by means of the at least one cutting device during a movement in the movement direction such that at least one machining step is carried out on the continuous battery electrode material,
wherein at least one dimension of at least one of the at least two conveyor belts is smaller than at least one dimension of the continuous battery electrode material at least in one region, such that the continuous battery electrode material can be freely machined in this region and/or between the two conveyor belts by means of the at least one cutting device,
wherein the at least one dimension of at least one of the at least two conveyor belts is a width dimension and/or an internal dimension and the at least one dimension of the continuous battery electrode material is a width dimension and/or an internal dimension, such that the continuous battery electrode material projects at least with one end of a broad side beyond the at least one conveyor belt and/or at least in an inner region beyond the at least one conveyor belt,
wherein the internal dimension of the at least one conveyor belt represents a substantially triangular shape of the conveyor belt in this region, and
wherein a tip of the substantially triangular shape is aligned counter to a movement direction substantially in the center of a broad side of the conveyor belt, or wherein a tip of the substantially triangular shape is aligned counter to the movement direction substantially at an edge region of the broad side of the conveyor belt.

2. The method according to claim 1 , wherein the at least one cutting device is a laser cutting device comprising at least one laser cutting element.

3. The method according to claim 1 ,
wherein the continuous battery electrode material is provided in the form of a coil, wherein a material web of the coil is moved in a movement direction from a starting point to an end point over a machining region by means of the transport device, and
wherein the material web passes the at least two transport units in series during the transport process.

4. The method according to claim 1 , wherein the at least two transport units are provided in the form of conveyor belts, and the at least one dimension of at least one of the at least two conveyor belts and the at least one dimension of the continuous battery electrode material are each a width dimension, such that the continuous battery electrode material projects at least with one end of a broad side beyond the at least one conveyor belt.

5. The method according to claim 1 ,
wherein the at least two transport units are provided in the form of at least two roller pairs,
wherein the at least one dimension of the at least two roller pairs relates to an intermediate region between two adjacent rollers in the movement direction, and
wherein this dimension is smaller than at least one dimension of the continuous battery electrode material, such that the continuous battery electrode material can be freely machined in this region by means of the at least one cutting device.

6. The method according to claim 1 , wherein at least one sensor device comprising at least one sensor element is provided, which the at least one sensor device is designed to detect and align the continuous battery electrode material before and/or during a movement in the movement direction from a starting point to an end point over a machining region continuously and/or at least during a point in time, such that the continuous battery electrode material is aligned with respect to at least one transport unit and at least one machining step.

7. The method according to claim 1 , further comprising providing at least one suction device comprising at least one suction element.

8. The method according to claim 1 , wherein a feed rate of the continuous battery electrode material is used at least in part as a cutting feed rate.

9. The method according to claim 1 , wherein a feed rate is set in a user-defined manner to a value of 10 m/s.

10. The method according to claim 1 , wherein a feed rate of at least two transport units in relation to one another is set in a user-defined manner, in particular is set to a substantially identical value.

11. The method according to claim 1 ,
wherein the transport device is divided into at least two conveyor belts, and
wherein each conveyor belt, comprises at least two roller pairs.

12. The method according to claim 1 , wherein at least one further transport unit is additionally provided, wherein this further at least one transport unit is provided in the form of a conveyor belt and has a dimension which is based on the broad side of the conveyor belt and is equal in size to or greater in size than a dimension of the continuous battery electrode material.

13. The method according to claim 1 , wherein the dimension of the continuous battery electrode material is based on a broad side of the continuous battery electrode material.

Assignees

• Volkswagen Aktiengsellschaft
• Volkswagen Ag

Inventors

• Böhm Dennis
• Breuer Alexander
• Rathmann Sven

Classifications

• H01M4/139

  Processes of manufacture · CPC title

• B23K26/0838

  by using an endless conveyor belt · CPC title

• B23K2101/36

  Electric or electronic devices · CPC title

• B23K26/042

  Automatically aligning the laser beam · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title