Method and Device for Producing an Electrode-Separator Assembly for a Battery Cell

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This invention relates to a method and device for manufacturing electrode-separator assemblies for battery cells. The process uses a vacuum roller that can both hold and precisely place electrodes onto separator material, forming an adhesive bond between them. The roller has different surface zones—one for holding the electrode and another for releasing it at the right moment onto the separator, aided by supporting components for accuracy and throughput.

Use CasesContent extracted from patent full text and abstract with AI.

• Automated manufacturing of battery cells in electric vehicles, consumer electronics, and energy storage systems.
• Production lines for lithium-ion or other advanced batteries seeking high throughput and precision assembly.
• Battery research facilities requiring prototyping of multilayer electrode-separator structures for new cell designs.

BenefitsContent extracted from patent full text and abstract with AI.

• Increases manufacturing speed and throughput compared to conventional pick-and-place or folding methods.
• Improves assembly precision, reducing the probability of defects such as folds or misaligned layers.
• Reduces process downtime and non-productive time, enhancing overall production efficiency.
• Allows flexible handling of electrodes of different sizes and designs.
• Reduces dependence on thermal bonding (can use room temperature adhesive processes), broadening the choice of compatible materials.

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Patent Abstract

The invention relates to a method and a device for producing an electrode-separator assembly for a battery cell. The method comprises the following: supplying a separator material (2) by means of a separator supply device; supplying an electrode (9; 10) by means of an electrode supply device; and producing an electrode-separator assembly by means of a joining device, the electrode (9; 10) being joined to the separator material (2) and an adhesive bond being formed between the electrode (9; 10) and the separator material (2). The electrode (9; 10) and the separator material (2) are joined using at least one vacuum roller (5; 6) which is designed, by means of a roller suction device in a first surface region of a roller body of the vacuum roller (5: 6), to hold the electrode (9; 10) on the roller body at least for supply and, by means of a roller nozzle device in a second surface region of the roller body which is different from the first surface region, to push the electrode away from the vacuum roller (5: 6) towards the separator material (2) for joining, the separator material being supported for joining by a support device which is arranged opposite the vacuum roller (5; 6).