Implantable battery having thermal shutdown separator

Details Implantable battery having thermal shutdown separator Implantable battery having thermal shutdown separator

H - Electricity

01

M

H01M 2/16 (2006.01) B23B 27/00 (2006.01) B32B 3/26 (2006.01) H01M 2/14 (2006.01)

Patent

CA 2594831

The present teachings include an electrochemical cell including an anode, a cathode, an electrolyte, a separator disposed between the cathode and anode, and a housing containing the anode, cathode, electrolyte, and separator. The separator can include a first sheet consisting essentially of a single layer material and a second sheet distinct from the first sheet. The second sheet can include an inner microporous layer laminated between two more outer layers. In some cells, the inner layer can have a transition temperature between a porous configuration and a substantially non-porous configuration that is between about 80 degrees C and 150 degrees C, and in which the two more outer layers maintain their structural integrity to at least about 10 degrees C greater than the first layer transition temperature.

L'invention concerne une cellule électrochimique qui comprend une anode, une cathode, un électrolyte, un séparateur entre la cathode et l'anode, et une enceinte contenant l'anode, la cathode, l'électrolyte et le séparateur, lequel peut comporter une première feuille constituée essentiellement d'un matériau en une seule couche et une seconde feuille distincte de la première. Cette seconde feuille peut comprendre une couche microporeuse interne laminée entre deux couches externes supplémentaires. Dans certaines cellules, la couche interne peut avoir une température de transition entre une configuration poreuse et une configuration sensiblement non poreuse comprise entre environ 80° C et 150 °C, sachant que les deux couches externes supplémentaires maintiennent leur intégrité structurelle à au moins environ 10° C de plus que la température de transition de la première couche.

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