Dual battery configuration to provide a long-term power in a...

G - Physics – 11 – C

Patent

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Details

G11C 5/14 (2006.01) G06K 19/073 (2006.01)

Patent

CA 2468489

A smart card package (112) includes two on-board batteries (102, 110) for providing uninterrupted power to a programmed, volatile memory unit (108A). The first battery (102) is a non-rechargeable battery with sufficient capacity to provide power to the volatile on-board memory (108a) during an initial storage period between programming the memory and deployment of the smart card (100). This initial storage period may be, for example, approximately two years. The second battery (110) is a rechargeable battery that will be charged by the host device in which the smart card is deployed. The second, rechargeable battery can provide power to the volatile memory (108a) throughout the life of the card, after the first, non-rechargeable battery (102) is dead. Specifically, the second, rechargeable battery (110) can provide power to the non-volatile memory when needed during, for example, any subsequent storage period or during movement of the smart card between host devices.

Selon l'invention, un boîtier de carte à puces intelligentes (112) comprend deux piles incorporées (102, 110) permettant de fournir une puissance ininterrompue à une mémoire volatile programmée (108A). La première pile (102) est une pile non rechargeable présentant une capacité suffisante pour fournir une certaine puissance à la mémoire volatile incorporée (108a), au cours d'une période de stockage initiale entre la programmation de la mémoire et la mise en place de la carte à puce intelligente (100). Ladite période de stockage initiale peut être, par exemple, d'environ deux ans. La seconde pile (110) est une pile rechargeable qui est chargée par le dispositif hôte dans lequel la carte à puce intelligente est mise en place. La seconde pile rechargeable peut fournir une certaine puissance à la mémoire volatile (108a) tout au long de la vie de la carte, après la mort de la première pile non rechargeable (102). La seconde pile rechargeable (110) peut notamment fournir une certaine puissance à la mémoire rémanente lorsque nécessaire au cours, par exemple, de n'importe quelle période de stockage ultérieure ou au cours du déplacement de la carte à puce intelligente entre des dispositifs hôtes.

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