Smart Card Charging Circuit for Battery Life Extension
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Solution Overview
Problem
Smart cards with built-in batteries require frequent replacement due to battery exhaustion, causing inconvenience in their usage.
Innovation Solution
An electronic card design that includes an antenna to receive external electric signals, a chip to demodulate these signals, and a charging circuit to convert them into charging power for the battery, which automatically charges when the battery's residual electricity falls below a predetermined level, using a controller and an electricity detector to manage the charging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a built-in battery is added to smart cards to enable additional functions, then the functionality of the card is improved, but the card requires frequent replacement when battery electricity is exhausted
Solution Approach 1:
The patent implements continuous charging capability through the charging circuit that can recharge the battery multiple times during the card's usage period. The charging circuit receives external electric signals and continuously converts them to charging power, maintaining the battery's electricity level and extending the effective duration of the card's functionality beyond what a single battery charge would allow.
Solution Approach 2:
The patent changes the operational parameter of the battery from a single-use depleted model to a reusable recharged model. By introducing the charging circuit that converts external electric signals into charging power, the battery's charge status becomes a dynamic parameter that can be repeatedly restored, thereby extending the card's service life without requiring frequent replacements.
2Reliability
If frequent battery replacement is required, then battery exhaustion is addressed, but user convenience and usage continuity are reduced
Solution Approach 1:
The patent implements self-service charging capability within the smart card through the integrated charging circuit. The card can autonomously receive external electric signals and convert them to charging power for its own battery without requiring user intervention for battery replacement. This self-recharging mechanism maintains reliability while significantly improving ease of operation by eliminating frequent replacement needs.
Solution Approach 2:
The continuous charging capability ensures that the card remains operational without interruption. The charging circuit can repeatedly recharge the battery during the card's service period, maintaining uninterrupted functionality and eliminating the convenience issues associated with frequent battery replacements.
3Duration of action of moving object
If external charging is implemented, then battery replacement frequency is reduced, but charging safety control becomes more complex
Solution Approach 1:
The patent implements a feedback mechanism through the electricity detector that continuously monitors the battery's residual electricity and provides feedback to the controller. The controller uses this feedback information to intelligently control the charging circuit, enabling it to adjust charging parameters and stop charging when appropriate. This feedback-based control extends card lifetime through multiple charging cycles while managing charging safety without excessive complexity.
Solution Approach 2:
The patent replaces manual battery replacement (mechanical operation) with an automated electronic charging system. The charging circuit electronically converts external electric signals to charging power, and the controller electronically manages the charging process based on electricity detector feedback. This substitution extends card lifetime while keeping the control mechanism manageable through electronic rather than mechanical means.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution extends the lifespan of smart cards by allowing them to be charged externally, eliminating the need for frequent replacements and ensuring safe charging to prevent battery damage or explosion.
Implementation Method 1
The antenna receives an external electric signal
Implementation Method 2
The charging circuit is coupled to the chip, receives the demodulated electric signal from the chip and converts the demodulated electric signal to generate a charging power
Data Source
AI summary
An electronic card including an antenna, a chip, a charging circuit and a battery is provided. The antenna receives an external electric signal, and the chip is coupled to the antenna, so as to receive the external electric signal and provide a demodulated electric signal. The charging circuit is coupled to the chip, receives the demodulated electric signal and converts the demodulated electric signal to generate a charging power. The battery is coupled to the charging circuit, wherein, the charging circuit provides the charging power to the battery according to a residual electricity of the battery, so as to charge the battery.