DC-DC Boost Control Using Battery Impedance Authentication
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Solution Overview
Problem
The integration of a microcomputer to verify battery authenticity, as described in Japanese Patent Laid-Open No. 2011-65752, is costly and does not effectively prevent the use of unauthorized or copied mobile batteries.
Innovation Solution
An information processing apparatus with a DC-DC converter that calculates the impedance of a mobile battery and controls the boost operation based on this impedance, stopping or limiting functions when the impedance exceeds certain thresholds to prevent the use of unauthorized batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a microcomputer is integrated to verify battery authenticity, then battery verification capability is improved, but device cost increases
Solution Approach 1:
The patent replaces the microcomputer-based verification system with an impedance-based detection system. The control unit calculates battery impedance by measuring voltage and current characteristics, and compares it against threshold values to determine battery authenticity. This substitution eliminates the need for expensive microcomputer integration while maintaining verification capability through electrical parameter analysis.
2Reliability
If impedance-based control is implemented, then copied battery usage is suppressed, but device complexity increases
Solution Approach 1:
The system uses the battery's own electrical characteristics (impedance) as the verification mechanism. By measuring voltage and current during normal operation and calculating impedance, the system enables the battery to self-verify its authenticity without requiring external verification hardware. The control unit simply monitors these self-generated electrical parameters and enforces operation restrictions based on the calculated impedance values.
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 approach effectively suppresses the use of copied mobile batteries at a lower cost, reduces apparatus size, and extends the life of the converter by preventing unauthorized battery usage and heat generation.
Implementation Method 1
a calculation unit configured to calculate an impedance of a mobile battery attached to the information processing apparatus
Data Source
AI summary
An information processing apparatus with a DC-DC converter, comprising: a calculation unit configured to calculate an impedance of a mobile battery attached to the information processing apparatus; and a control unit configured to control continuation or stop of a boost operation of the DC-DC converter on a basis of the impedance, wherein the control unit performs control to continue the boost operation of the DC-DC converter when the impedance is less than a threshold, and performs control to continue the boost operation by limiting some of functions of the information processing apparatus when the impedance is equal to or more than the threshold and less than a second threshold.