Abstract: A supercapacitor including at least one first electrode substrate having a surface coated with an active material, and at least one second electrode substrate having a surface coated with the active material, wherein the at least one first electrode substrate has a polarity reverse to that of the at least one second electrode substrate. The at least one first and second electrode substrates are stacked in an alternating arrangement. A plurality of the first electrode substrate having the same polarity or a plurality of the second electrode substrate having the same polarity is connected in parallel. The at least one first and second electrode substrates include stacking portions each having opposite surfaces arranged with a frame-shaped insulating ring. An electrolyte is accommodated in spaces enclosed by the opposite surfaces of each stacking portion of the at least one first and second electrode substrates and each insulating ring.

Abstract: A charge and discharge balancing circuit for a storage battery set, the set comprising n storage batteries connected in series, the circuit comprising: a switch set constituted of n switches, each switch having a first and a second switching nodes and a common node, the second switching node of a previous switch and the first switching node of a next switch being electrically connected, and the first switching node and the second switching node of each switch being connected in parallel to both terminals of the storage battery in order; an electricity storage component set constituted of n?1 electricity storage components connected in series, both terminals of each electricity storage component being connected in parallel to the common nodes of two switches in order; and a pulse generator for controlling the switching of the common node of each switch between the first and the second switching node at a frequency.

Abstract: The present invention relates to a smartcard, comprising: an energy converting device for converting energy into electric power; a power storage component for storing the electric power supplied by the energy converting device and outputting a voltage; and a voltage stabilizing unit for adjusting the voltage outputted by the power storage component to a working voltage of a load of the smartcard and outputting the adjusted working voltage to the load. The smartcard of the present invention can convert the energy outside the smartcard into electric power and store the converted electric power so as to continuously or temporarily provide power supply to the loads of the smartcard. Therefore, the cycle life of the smartcard can be extended greatly.

Abstract: A supercapacitor including at least one first electrode substrate having a surface coated with an active material, and at least one second electrode substrate having a surface coated with the active material, wherein the at least one first electrode substrate has a polarity reverse to that of the at least one second electrode substrate. The at least one first and second electrode substrates are stacked in an alternating arrangement. A plurality of the first electrode substrate having the same polarity or a plurality of the second electrode substrate having the same polarity is connected in parallel. The at least one first and second electrode substrates include stacking portions each having opposite surfaces arranged with a frame-shaped insulating ring. An electrolyte is accommodated in spaces enclosed by the opposite surfaces of each stacking portion of the at least one first and second electrode substrates and each insulating ring.