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Contactless smart card

A non-contact, smart card technology, applied in the field of smart cards, can solve the problems of resource waste, affecting the life cycle of smart cards, smart cards can no longer be used, etc., to achieve the effect of increasing the use time and frequency

Inactive Publication Date: 2016-07-27
BEIJING HUADA ZHIBAO ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The internal battery of the existing non-contact smart card cannot be taken out and replaced. Once the battery power is exhausted, the smart card can no longer be used, resulting in waste of resources and affecting the life cycle of the smart card

Method used

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Embodiment Construction

[0018] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are only provided to enable those skilled in the art to better understand and then implement the present invention, but not to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0019] Hereinafter, the embodiment of the present invention will be described with reference to the block diagram of the device (or system) of the embodiment of the present invention.

[0020] reference figure 1 Shown is a schematic structural diagram of a contactless smart card provided by an embodiment of the present invention. The smart card in this embodiment may include: an antenna coil 11, a first rectification circuit 12, a second rec...

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Abstract

The invention discloses a contactless smart card which is applied to the technical field of smart cards. The service life and the use number of times of a battery in the smart card are improved. The use cycle of the smart card is extended. According to the embodiment of the invention, the smart card comprises an antenna coil, a first rectifying circuit, a second rectifying circuit, a charging management circuit and a rechargeable battery; the antenna coil is coupled with magnetic field produced by an external device to generate electric energy; the first rectifying circuit which is connected with the antenna coil is used for acquiring electric energy produced by the coupling of the antenna coil and converting acquired alternating current to direct current; the second rectifying circuit is used for carrying out filtering and voltage stabilizing on the output of the first rectifying circuit; the charging management circuit is used for controlling the charging of the rechargeable battery and adjusting the amplitude of charging current in real time; and the rechargeable battery provides a work power supply for the smart card.

Description

Technical field [0001] The invention relates to the technical field of smart cards, in particular to a non-contact smart card. Background technique [0002] Smart cards are divided into contact smart cards and non-contact smart cards. The power supply required for contactless smart card work currently mainly relies on electromagnetic fields provided by external devices. [0003] The external device sends energy out in an electromagnetic field through the antenna, and the non-contact smart card generates electric energy by coupling the built-in antenna with the electromagnetic field generated by the external device, thereby realizing the non-contact transmission of energy. A small number of non-contact smart card chips have high energy requirements. The electrical energy generated by antenna coupling alone cannot provide enough energy to implement all functions, so non-contact smart cards with small-capacity batteries have appeared. [0004] The battery placed inside the contactless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J17/00G06K19/077
Inventor 韦可斐靳松张强陈良周飞崔静波朱峰刘鲜花苏文力
Owner BEIJING HUADA ZHIBAO ELECTRONICS SYST