Electrochemical device with high safety at over-voltage and...

H - Electricity – 01 – M

Patent

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Details

H01M 2/00 (2006.01) C25B 3/00 (2006.01) C25B 1/00 (2006.01) C25B 15/02 (2006.01) H01M 10/36 (2006.01)

Patent

CA 2594988

Disclosed is an electrochemical device including a gas discharge member disposed in inner volumes thereof or used as an element for forming the device, wherein the gas discharge member comprises: (a) a core portion containing a compound that discharges gases other than oxygen at a predetermined temperature range; and (b) a polymeric shell portion for encapsulating the compound and surrounding the core portion. A center pin for an electrochemical device having the gas discharge member inserted into the interstitial volumes of the device is also disclosed. The electrochemical device comprising the gas discharge member, which discharges a large amount of gas at a predetermined temperature and is inserted into the inner volumes of the device, is prevented from ignition or explosion under overcharge and high-temperature storage conditions with no drop in the performance.

L'invention concerne un dispositif électrochimique incluant un élément de décharge gazeuse disposé dans les volumes intérieurs ou utilisé en tant qu'élément pour former le dispositif, où l'élément de décharge gazeuse se compose : a) d'une partie centrale contenant un composé qui libère des gaz autres que l'oxygène à une plage de température prédéterminée; ainsi que b) d'une partie d'une enveloppe polymère pour encapsuler le composé et entourer la partie centrale. L'invention concerne également un essieu central pour un dispositif électrochimique dont l'élément de décharge gazeuse est inséré dans les volumes interstitiels du dispositif. Le dispositif électrochimique comporte l'élément de décharge gazeuse, qui libère une grande quantité de gaz à une température prédéterminée et est inséré dans les volumes intérieurs du dispositif, bloqué pour ce qui est de l'allumage ou de l'explosion sous la surcharge et l'entreposage à des températures trop élevées avec aucune baisse du rendement.

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