Method for producing an electrode stack for energy stores, and stacking system

Patent metadata

Field	Value
Publication number	US-11127970-B2
Application number	US-201916250235-A
Country	US
Kind code	B2
Filing date	Jan 17, 2019
Priority date	Jan 22, 2018
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A method for producing an electrode stack for an energy store of a motor vehicle; as electrodes, cathodes and anodes being alternately stacked on top of one another with the interposition of a separator strip, the separator strip first having the cathodes and anodes laid thereon, thereby forming an electrode strip, and, subsequently thereto, the electrode strip being folded numerous times to stack the cathodes and the anodes on top of one another. It is provided that the electrode strip be oriented in a horizontal plane for the folding process, and, on that basis, be folded in sections or, as a whole, between the electrodes.

First claim

The invention claimed is:

1. A stacking system for producing an electrode stack, comprising
a folding device for folding an electrode strip, having a separator strip having anodes and cathodes laid thereon, into an electrode stack, in which where anodes and cathodes are alternately stacked on top of one another with the interposition of the separator strip,
at least one horizontally oriented track for guiding the electrode strip or for laying it during a folding process, and
a gripping device having at least two grippers that are associated or able to be associated with longitudinal sides of the electrode strip, so that, in each case, two grippers oppose one another, the grippers being designed to grip the electrode strip between each second electrode to tension it transversely and raise it.

2. The stacking system as recited in claim 1 , wherein the gripping device has a device for holding down the electrode strip between every second other electrode on the horizontal track.

3. The stacking system as recited in claim 1 , wherein the device includes at least one compressed air nozzle that is connected or connectable to a compressed air generator.

4. The stacking system as recited in claim 1 , wherein a holder for accommodating the folded electrode strip is associated with a track end of the horizontal track.

5. The stacking system as recited in claim 4 , wherein two opposing grippers of the gripping device are guided along a curved track in order to raise the electrode strip and feed it into the holder.

6. The stacking system as recited in claim 5 , wherein the curved track is a circular track.

7. The stacking system as recited in claim 4 , wherein the horizontal track has at least one feeding device for feeding the electrode strip to the holder, the holder being vertically movable, in order to fold the electrode strip while the feeding device feeds it into the holder.

8. A stacking system for producing an electrode stack, comprising:
a folding device for folding an electrode strip, having a separator strip having anodes and cathodes laid thereon, into an electrode stack, in which where anodes and cathodes are alternately stacked on top of one another with the interposition of the separator strip,
at least one horizontally oriented track for guiding the electrode strip or for laying it during a folding process, and
a gripping device having at least two opposing grippers that are associated or able to be associated with longitudinal sides of the electrode strip, wherein the two opposing grippers of the gripping device are guided along a curved track in order to raise the electrode strip and feed it into the holder.

9. The stacking system as recited in claim 8 , wherein the gripping device has a device for holding down the electrode strip between every second other electrode on the horizontal track.

10. The stacking system as recited in claim 9 , wherein the device includes at least one compressed air nozzle that is connected or connectable to a compressed air generator.

11. The stacking system as recited in claim 8 , wherein a holder for accommodating the folded electrode strip is associated with a track end of the horizontal track.

12. The stacking system as recited in claim 11 , wherein the horizontal track has at least one feeding device for feeding the electrode strip to the holder, the holder being vertically movable, in order to fold the electrode strip while the feeding device feeds it into the holder.

13. The stacking system as recited in claim 8 , wherein the curved track is a circular track.

Assignees

• Volkswagen Ag

Inventors

• Böhm Dennis

Classifications

• B65H45/10

  transversely · CPC title

• H01M10/0583

  of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators · CPC title

• H01M10/0459 Primary

  Cells or batteries with folded separator between plate-like electrodes · CPC title

• H01M4/04

  Processes of manufacture in general · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title