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Method and device for producing cell stack of battery cells

A battery and single-cell technology, applied in the field of single-cell stack devices, can solve problems such as slow cycle time, difficult to achieve position tolerance, and complex material handling

Pending Publication Date: 2022-03-15
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, it is extremely difficult to achieve the required positional tolerances during the short cycle stack formation process
Furthermore, the separate preparation of the individual sheets for the single-cell stack, followed by storage, merging, stacking and joining, necessitates a series of process steps which in each case require a complex handling of the material
A large number of process steps also requires a greater outlay in terms of plant technology and can only achieve relatively slow cycle times

Method used

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  • Method and device for producing cell stack of battery cells
  • Method and device for producing cell stack of battery cells
  • Method and device for producing cell stack of battery cells

Examples

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Embodiment Construction

[0070] figure 1 The first cutting device 1 is shown in side view. The first storage device 2 is located at figure 1 To the left, the first storage device 2 has a reserve of first material webs 3 . The first storage device 2 can be, for example, a prefabricated unit comprising a calendered parent roll with a first material web 3 , eg for the anodes 7 of the battery cells 8 . The calendered and rolled-up first material web 3 has a particularly uniform layer thickness and is fed to the first cutting device 1 under as constant and defined tension as possible in order to avoid folds in the first material web 3 Tuck. The first cutting device 1 consists of a bottom roll 4 , a top roll 5 and a hole unit 6 . The cutting performed in the first cutting device 1 will also be described in detail below. In the embodiment shown here, the first material web 3 has a width which is chosen such that the material web 3 can be divided in the longitudinal direction during cutting, so that two ...

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Abstract

The invention relates to a method for producing a cell stack (57) of battery cells (8), comprising at least the following steps: a) feeding at least one first material web (3) made of a first material; b) feeding at least one second material web (22, 27) made of a second material; c) carrying out a first cut on the first material web (3) and the second material web (22, 27) while forming at least one tensile transport section (18), the respective transport section (18) being arranged offset in the transverse direction with respect to the material web (3, 22, 27); d) joining the first material web (3) and the second material web (22, 27); e) carrying out a second cutting, the transport sections (18) of the first and second material webs (3, 22, 27) being cut independently of one another at least in transversely or longitudinally offset slits (14).

Description

technical field [0001] The invention relates to a method for producing a cell stack of battery cells and a device for producing a cell stack of battery cells. Background technique [0002] It is known in the prior art to manufacture cell stacks of battery cells by using separate equipment to separate cathode, anode and separator sheets. The sheets produced in this way are then each individually and separately supplied in magazines and positioned and oriented individually when forming the individual sheet stacks during stacking. This process of producing single-cell stacks requires very long cycle times (or takt times). [0003] Another known method is the so-called Z-folding, in which separator sheets are wound on the individual electrode sheets, but these electrode sheets also have to be separated and positioned beforehand in a preceding process step. The Z-fold also only achieves relatively slow cycle times. [0004] It is also known to form the stack by means of a lami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04
CPCH01M10/04H01M10/0404H01M2220/20Y02E60/10Y02P70/50H01M10/0413H01M10/058
Inventor K.贾马达尔C.泰厄尔考夫
Owner VOLKSWAGEN AG
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