Method for the manufacture of an electrochemical cell or...

H - Electricity – 01 – M

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319/40, 319/8

H01M 8/00 (2006.01) B29C 65/08 (2006.01) H01M 6/48 (2006.01) H01M 8/24 (2006.01)

Patent

CA 1129946

A B S T R A C T The invention relates to a method of manufacturing of an electro- chemical cell or battery, consisting of a stack of plate-shaped elements, including at least two electrode elements. The elements consist of a sheet or plate of electrode material which is mounted in a frame consisting entirely or partly of a thermoplastic material, in such a way that gas or liquid chambers are formed between the elements. These elements contain apertures which in the completed stack form channels for the supply or removal of liquid or gas. The thermoplastic material of adjacent elements are welded together by fusing the thermoplastic material and hardening it again. At least one of the contact faces of successive elements is pro- vided with welding ridges consisting of the thermoplastic material around the edges of the orifices and along the inside and/or outside edge(s) of the element. The elements are attached to one another by vibration welding. The method according to the invention is particularly suited for application to the manufacture of an electrochemical cell or battery in which gas and/or liquid transport occurs, as the channels serving for this are formed in a very simple way.

312491

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