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Verbessertes elektrochemisches Speicherelement

Electrochemical battery or accumulator, for magnetic field-sensitive applications, comprises flat cells with cathode and anode tags positioned to minimize stray magnetic fields
 
: Neumann, G.; Gulde, P.; Wuersig, A.

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Frontpage ()

DE 102008032068 A: 20080708
DE 102008032068 A: 20080708
H01M0010
H01M0002
H01M0006
German
Patent, Electronic Publication
Fraunhofer ISIT ()

Abstract
(A1) Die Erfindung betrifft ein verbessertes elektrochemisches Bauelement oder Speicherelement zur Speicherung sowie Abgabe elektrischer Energie, das sich durch eine Reduzierung oder Verhinderung einer Ausbildung magnetischer Streufelder auszeichnet. Zu diesem Zweck enthaelt das Element wenigstens zwei elektrochemische Zellen mit den ueblichen Komponenten. Diese Zellen sind derart zueinander angeordnet, dass die Zellen (20a, b) derart angeordnet sind, dass eine mit dem Kathodenstromsammler verbundene Anschlussfahne (13a) einer Zelle (20a) relativ zu einer mit dem Anodenstromsammler verbundenen Anschlussfahne (12b) einer benachbarten Zelle (20b) so positioniert ist, dass sich die durch bewegte elektrische Ladungen in den Anschlussfahnen (13a, 12b) erzeugten magnetischen Felder ueberlagern und im Wesentlichen kompensieren.

 

WO 2010003979 A1 UPAB: 20100122 NOVELTY - In a component for storing and discharging electrical energy, comprising flat electrochemical cells, each with a cathode, anode, separator and cathode and anode current collectors each having a connecting tag (12a, 12b, 13a, 13b), the cathode tag (13a) of one cell (20a) is positioned relative to the anode tag (12b) of an adjacent cell (20b) such that magnetic fields generated by moving electric charges in the tags overlap and compensate for each other. DETAILED DESCRIPTION - An electrochemical component for storing and discharging electrical energy comprises at least two electrochemical cells (20a, 20b), each with a flat cathode, flat anode and flat separator and cathode and anode current collectors (connected to the cathode and anode respectively and each having a connecting tag (12a, 12b, 13a, 13b)). The novel feature is that the cells are relatively aligned with the tag (13a) for the cathode of one cell (20a) positioned relative to the tag (12b) for the anode of an adjacent cell (20b) in such a way that magnetic fields generated by moving electric charges in the tags overlap and compensate for each other. An INDEPENDENT CLAIM is included for the production of the electrochemical components, by locating at least two flat primary or secondary cells (20a, 20b) adjacent to each other, with the connecting tags (12a, 12b, 13a, 13b) of one cells forming a four-pole arrangement. USE - The electrochemical components are generally in the form of batteries or accumulators of various sizes and shapes for all types of applications, specifically flat batteries or accumulators consisting of foil-like layers, especially lithium ion or lithium-polymer cells. They are particularly useful in magnetic field-sensitive applications, e.g. in devices for measuring disturbances in the earth's magnetic field (typically to detect archeological articles) or in magnetic field-sensitive sensors or location systems (typically for medicinal or military use). ADVANTAGE - Formation of stray magnetic fields is minimized, thus reducing or eliminating charge flow-sensitive magnetic field fluctuations having an adverse effect in magnetic field-sensitive applications.

: http://publica.fraunhofer.de/documents/N-118885.html