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Method for forming metal composite film for battery cells

A metal composite, battery cell technology, applied in large-sized cells/battery packs, small-sized cells/battery packs, batteries, etc., can solve problems such as time-consuming

Pending Publication Date: 2021-07-20
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is however very time consuming and requires a lot of experience on the part of the executive

Method used

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  • Method for forming metal composite film for battery cells
  • Method for forming metal composite film for battery cells
  • Method for forming metal composite film for battery cells

Examples

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Embodiment Construction

[0042] figure 1 A shaping device 1 is shown in side sectional view. The molding device 1 is composed of a first section 2 , which is designed as a die and forms the lower part, and a second section 3 which acts as a film holder 20 and forms the upper part of the molding device 1 . Between the first section 2 and the second section 3 , the metal composite film 4 is firmly clamped at the outer edge of the forming device 1 . For this purpose, the first section 2 and the second section 3 are firmly pressed against each other. The metal composite film 4 is, for example, an aluminum composite film, which is also known as a flexible film. The two sections 2 , 3 together enclose a cutout 5 in which the soft envelope is formed into a finished film recess, a so-called soft bag. The first section 2 forms that part of the cutout 5 which forms the final molded part 6 . That is to say that the first section 2 is formed as a precise negative mold for completing the end state of the shape...

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Abstract

A method for forming a metal composite film (4) for battery cells (17) includes at least the following steps: (a) inserting the metal composite film (4) into a forming apparatus (1) having a recess (5); (b) fixing the metal composite film (4) in place by closing a film holder (3); (c) preforming the metal composite film within the recess (5) in a first direction; and (d) final forming of the metal composite film (4) within the recess in a second direction.

Description

technical field [0001] The invention relates to a method for forming a metal composite film for a battery cell, and to a battery cell produced according to the method. In particular, the invention relates to the preforming and final forming of aluminum composite films for high capacity battery cells by means of compressed air and electromagnetic pulses. Background technique [0002] For the production of the battery cell, it is necessary to shape the metal composite foil so that the receiving cavity for the battery cell with a high power density can be formed. For this it is usually necessary to shape the metal composite film. In the prior art, for this purpose, so-called pouches (or pouches) are known, for example, which are produced from a composite part of aluminum and plastic. Here, at least one relatively thin layer of aluminum is connected to a further layer of soft plastic. However, such aluminum laminate films have poor deep-drawability, so that cracks and wrinkle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/10B21D26/14B21D43/00B21D33/00
CPCB21D26/14B21D43/003B21D33/00B21D26/021H01M50/00B21D22/203Y02E60/10H01M50/124H01M50/102H01M50/119H01M2220/20
Inventor F.格劳K.贾马达C.泰厄尔考夫
Owner VOLKSWAGEN AG