Battery Authentication via Voltage Response Analysis
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Solution Overview
Problem
Existing battery authentication methods, including cryptographic protocols and battery ID resistors, are inadequate in distinguishing between authentic and counterfeit batteries, as counterfeit batteries can mimic authentic responses, leading to potential damage to mobile devices during charging or usage.
Innovation Solution
The implementation of a power management module in mobile devices that measures and compares electromagnetic radiation spectra and voltage responses of batteries under various conditions to determine their relative condition, using reference spectrums and responses specific to authentic batteries, thereby enhancing authentication and security by leveraging physical and electrical properties unique to each battery model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If cryptographic protocols and battery ID resistors are used for authentication, then battery identification capability is improved, but authentication reliability deteriorates because counterfeit batteries can mimic authentic responses
Solution Approach 1:
The patent transitions from static authentication parameters (battery ID resistor values, cryptographic keys) to dynamic physical parameters that change with battery condition. It measures voltage responses under multiple different current loads and temperature conditions, creating a multi-dimensional parameter space that counterfeit batteries cannot replicate. The system evaluates the relationship between current, voltage, and temperature across multiple operating points rather than relying on fixed identification values.
Solution Approach 2:
The patent adds temporal and environmental dimensions to battery authentication. Instead of a single static check, it performs measurements across multiple time points during charging/discharging cycles and under varying temperature conditions. This creates a multi-dimensional authentication space (current, voltage, temperature, time) that significantly increases the complexity for counterfeit batteries to fake authentic behavior across all dimensions simultaneously.
2Reliability
If multiple test conditions and correlation criteria are used to validate battery authenticity, then authentication robustness is improved, but device complexity increases
Solution Approach 1:
The patent uses the existing power management circuitry and sensors (current sensors, temperature sensors) for dual purposes: normal battery management functions and authentication measurements. The same ADC (analog-to-digital converter) and processing unit that monitor battery health during operation are also used to collect authentication data across multiple operating conditions, eliminating the need for separate dedicated authentication hardware.
Solution Approach 2:
The system uses its own operational variations (natural changes in current load, temperature, and charging state during normal device usage) to generate authentication test conditions. Rather than requiring external test equipment or separate authentication sessions, the device leverages its own operational diversity to create the necessary measurement scenarios, making the authentication process self-contained and reducing additional hardware requirements.
Data Source
AI summary
In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.