H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/16 (2006.01)
Patent
CA 2586062
Disclosed is a separator for electrochemical devices which is composed of a porous film containing a porous base (5) having a heat resistance of not less than 150~C and containing filler particles (3), at least one shutdown resin (6) selected from resins A having a melting point of 80-130~C and resins B which absorb the electrolyte solution and swell when heated and the swelling degree of which becomes higher as the temperature is increased, and a binder (4). By using such a separator, there can be obtained an electrochemical device having excellent safety at high temperatures.
La présente invention décrit un séparateur pour dispositifs électrochimiques composé d~un film poreux contenant une base poreuse (5) résistant thermiquement à au moins 150 °C et contenant des particules de charge (3), au moins une résine d~arrêt (6) choisie parmi des résines A ayant un point de fusion allant de 80 à 130 °C et des résines B qui absorbent la solution d~électrolyte et gonflent lorsqu~on les chauffe, leur degré de gonflement augmentant avec la température, et un liant (4). L~utilisation d~un tel séparateur permet d~obtenir un dispositif électrochimique extrêmement sûr à des températures élevées.
Abe Toshihiro
Aoyama Shigeo
Katayama Hideaki
Kita Fusaji
Matsumoto Nobuaki
Hitachi Maxell Ltd.
Smart & Biggar
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