Method for the manufacture of an electrochemical cell or battery and battery made by the method
First Claim
1. A method for the manufacture of an electrochemical cell or battery, consisting of a stack of plate-shaped elements, including at least two electrode elements, each of which consists of a sheet or plate of electrode material which is mounted in a frame made of an electrically insulating fibrous-web material impregnated with a thermosetting synthetic material, which elements, prior to setting, are stacked to form a package of the desired composition in such a way that gas or liquid chambers are formed between the elements, after which the stack is subjected to a compression molding operation at a temperature causing the thermosetting synthetic material to polymerize, thus forming the stack into a coherent block, wherein the improvement comprises the steps of employing a first compression molding operation stage wherein the individual plate-shaped elements are manufactured by placing a sheet of electrode material in a press mold between frame sections made of electrically insulating fibrous web impregnated with a non-polymerized thermosetting synthetic material and heating the assembly under pressure for a relatively short primary time at a relatively low primary temperature, at which temperature the thermosetting synthetic material flows well, but polymerizes only to a minor degree at most, after which the resulting plate-shaped elements, together with any other cell or battery components, are stacked into a package of the desired composition, which package in a second compression molding operation stage is formed into a coherent block by compressing it for a relatively long secondary time and at a relatively high secondary temperature, at which the thermosetting synthetic material sets.
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Abstract
The invention relates to a method for the manufacture of an electrochemical cell or battery, consisting of a stack of plate-shaped elements, each of which consists of a sheet or plate of electrode material which is mounted in a frame made of electrically insulating fibrous-web material impregnated with a non-polymerized thermosetting synthetic material, which elements in a first compression molding stage are heated under pressure for a relatively short primary time at a relatively low primary temperature under which conditions the thermosetting synthetic material flows well but polymerizes only to a minor degree, thereafter the elements are combined with other battery components are stacked into an electrochemical cell package which in a second compression molding stage is formed into a coherent block by compression for a relatively long secondary time and at a relatively high secondary temperature to set the thermosetting synthetic material.
46 Citations
12 Claims
- 1. A method for the manufacture of an electrochemical cell or battery, consisting of a stack of plate-shaped elements, including at least two electrode elements, each of which consists of a sheet or plate of electrode material which is mounted in a frame made of an electrically insulating fibrous-web material impregnated with a thermosetting synthetic material, which elements, prior to setting, are stacked to form a package of the desired composition in such a way that gas or liquid chambers are formed between the elements, after which the stack is subjected to a compression molding operation at a temperature causing the thermosetting synthetic material to polymerize, thus forming the stack into a coherent block, wherein the improvement comprises the steps of employing a first compression molding operation stage wherein the individual plate-shaped elements are manufactured by placing a sheet of electrode material in a press mold between frame sections made of electrically insulating fibrous web impregnated with a non-polymerized thermosetting synthetic material and heating the assembly under pressure for a relatively short primary time at a relatively low primary temperature, at which temperature the thermosetting synthetic material flows well, but polymerizes only to a minor degree at most, after which the resulting plate-shaped elements, together with any other cell or battery components, are stacked into a package of the desired composition, which package in a second compression molding operation stage is formed into a coherent block by compressing it for a relatively long secondary time and at a relatively high secondary temperature, at which the thermosetting synthetic material sets.
Specification