Method and apparatus for applying a self-adhesive film to an electrical energy storage cell

Patent metadata

Field	Value
Publication number	US-10388917-B2
Application number	US-201615288197-A
Country	US
Kind code	B2
Filing date	Oct 7, 2016
Priority date	Apr 10, 2014
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A method for the at least partial production of an electrical energy storage cell includes providing the electrode/separator arrangement, providing a plastics foil of self-adhesive form, and applying the self-adhesive plastics foil to at least a subregion of the arrangement surface. The energy storage cell has a storage cell housing in which there is accommodated an electrode/separator arrangement which is required for the operation of the energy storage cell. The electrode/separator arrangement has a layer structure with a sequence of cathode layers and anode layers. Opposite cathode and anode layers there are in each case separated from one another by a separator layer which is in of a porous form. The electrode/separator arrangement has an arrangement surface.

First claim

What is claimed is:

1. A method for the at least partial production of an electrical energy storage cell, the energy storage cell having a storage cell housing in which there is accommodated an electrode/separator arrangement which is required for the operation of the energy storage cell, the electrode/separator arrangement having a layer structure with a sequence of cathode layers and anode layers, opposite cathode and anode layers being in each case separated from one another by a separator layer which is in of a porous form, and the electrode/separator arrangement having an arrangement surface, the method comprising the acts of:
providing the electrode/separator arrangement;
providing a plastics foil of self-adhesive form;
applying the self-adhesive plastics foil to at least a subregion of the arrangement surface, wherein
the provided electrode/separator arrangement has a loose layer structure or a Z-folded layer structure or a wound layer structure, and
the application is performed by winding the self-adhesive plastics foil onto the electrode/separator arrangement.

2. The method as claimed in claim 1 , wherein at least one layer, preferably two layers, of the self-adhesive plastics foil is/are wound on the electrode/separator arrangement.

3. The method as claimed in claim 2 , wherein the plastics foil is of elastic form.

4. The method as claimed in claim 3 , wherein the plastics foil is composed of a polyolefin, in particular of polyethylene, or of a polyester.

5. The method as claimed in claim 4 , wherein the plastics foil has a thickness of 5 to 50 μm, preferably 10 to 30 μm, particularly preferably 12 to 18 μm.

6. The method as claimed in claim 5 , wherein the plastics foil is of perforated form at least in a subregion.

7. The method as claimed in claim 6 , further comprising: severing the plastics foil applied to the arrangement surface from the further provided, non-applied plastics foil.

8. The method as claimed in claim 7 , wherein following the application of the plastics foil the method further comprises: introducing the electrode/separator arrangement into the storage cell housing.

9. The method as claimed in claim 8 , wherein the storage cell housing is a housing formed from metal or is a housing formed from a composite foil, in particular aluminum composite foil.

10. An energy storage module having an electrical energy storage cell produced by way of a method as claimed in claim 9 .

11. A traction battery having an electrical energy storage cell produced by way of a method as claimed in claim 9 .

12. The method as claimed in claim 1 , wherein the winding is performed so that the self-adhesive plastics foil contacts at least four different surfaces of the electrode/separator arrangement.

13. A device for the at least partial production of an electrical energy storage cell, the energy storage cell having a storage cell housing in which there is accommodated an electrode/separator arrangement which is required for the operation of the energy storage cell, the electrode/separator arrangement having a layer structure with a sequence of cathode layers and anode layers, opposite cathode and anode layers being in each case separated from one another by a separator layer which is in particular of porous form, and the electrode/separator arrangement having an arrangement surface ( 40 ), the device comprising:
an arrangement provision unit which is designed for providing the electrode/separator arrangement;
a foil provision unit which is designed for providing a plastics foil of self-adhesive form; and
an application unit which is designed for applying the self-adhesive plastics foil to at least a subregion of the arrangement surface, wherein
the provided electrode/separator arrangement has a loose layer structure or a Z-folded layer structure or a wound layer structure, and
the application is performed by winding the self-adhesive plastics foil onto the electrode/separator arrangement.

14. The device as claimed in claim 13 , wherein the self-adhesive plastics foil contacts at least four different surfaces of the electrode/separator arrangement.

15. A device for the at least partial production of an electrical energy storage cell, the energy storage cell having a storage cell housing in which there is accommodated an electrode/separator arrangement which is required for the operation of the energy storage cell, the electrode/separator arrangement having a layer structure with a sequence of cathode layers and anode layers, opposite cathode and anode layers being in each case separated from one another by a separator layer which is in particular of porous form, and the electrode/separator arrangement having an arrangement surface ( 40 ), the device comprising:
an arrangement provision unit which is designed for providing the electrode/separator arrangement;
a foil provision unit which is designed for providing a plastics foil of self-adhesive form; and
an application unit which is designed for applying the self-adhesive plastics foil to at least a subregion of the arrangement surface, wherein
the self-adhesive plastics foil contacts at least four different surfaces of the electrode/separator arrangement.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Woehrle Thomas
• Zeilinger Tobias
• Ogihara Hideki

Classifications

• H01M10/0583 Primary

  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

• H01M10/058 Primary

  Construction or manufacture · CPC title

• H01M50/122

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/133

  Thickness · CPC title