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Electrochemical cell and method for producing same

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve problems such as short circuit, electrode-diaphragm composite diaphragm melting, etc.

Pending Publication Date: 2021-12-24
VARTA MICROBATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, melting of the diaphragm of the electrode-diaphragm complex can occur during welding of the contact plates
In extreme cases, this may cause a short circuit

Method used

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  • Electrochemical cell and method for producing same
  • Electrochemical cell and method for producing same
  • Electrochemical cell and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0154] The two end faces 103 and 109 are formed by the longitudinal edges of the strip-shaped membranes 116 and 117 . Within the electrode-diaphragm assembly 100, the electrodes 115 and 118 are arranged offset to one another, so that the longitudinal edge of the anode 115 protrudes from one of these end sides and forms the protrusion 110, while the longitudinal edge of the cathode 118 protrudes from the opposite end side. out and form a protrusion 102.

[0155] Figure 6 used to clarify the figure 1 and 5 The configuration of the coil shown in . A section through the anode 115 and the cathode 118 and one precursor each of the two electrodes 115 and 118 is shown here. The precursor differs from electrodes 115 and 118 only in that the latter each have a coating of support material 119 . Like electrodes 115 and 118, these precursors include an anode current collector 115a and a cathode current collector 118a. The anode current collector 115a is copper foil. The cathode cur...

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Abstract

The invention relates to an electrochemical cell (100) comprising an electrode-separator composite (101) with an anode (115), at least one separator (116, 117), and a cathode (118). The anode (115) and the cathode (118) each comprises a current collector (115a, 118a) which has a surface that consists of at least one metal and is loaded with at least one layer (115b, 118b) made of an electrode active material. The surfaces of the current collectors (115a, 118a) comprise at least one free region (115c, 118c) which is not loaded with the electrode active material. Instead, the surfaces are coated with a support material (119) in the at least one free region (115c, 118c), and the support material is more thermally resistant than the surface coated therewith. During the production of the cell (100), the support material (119) is applied onto the at least one free region (115c, 118c) or is formed thereon before or after the electrode-separator composite (101) is completed.

Description

technical field [0001] The invention described subsequently relates to an electrochemical cell having an electrode-membrane assembly with an anode, at least one separator and a cathode. Background technique [0002] Such a battery is already known in principle, for example from DE 10 2009 060 800 A1. In this German patent application, cylindrical coils consisting of electrode-diaphragm assemblies are described which are inserted into cylindrical metal housings. For the electrical contacting of the electrodes, current collectors are used which are loaded with the electrode active material. These current collectors are respectively welded to metal foils which serve as individual electrical conductors and these current collectors are electrically connected to the housing. [0003] The method for electrical contacting of counter electrodes described in DE 10 2009 060 800 A1 is efficient and cost-effective. However, this method has disadvantages in certain application cases. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/66H01M10/052H01M10/0585H01M10/0587H01M10/04
CPCH01M10/052H01M4/0421H01M4/667H01M10/0431H01M10/643Y02E60/10Y02P70/50H01M4/02H01M50/40H01M4/662H01M10/0525H01M2004/028
Inventor S·斯托克E·皮特利克R·哈德D·恩斯林B·贝克
Owner VARTA MICROBATTERY