Battery Authenticity Detection Using Charge-Discharge State Comparison

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Solution Overview

Problem

Existing battery authentication systems fail to correctly identify imitation products when only a battery cell is replaced, as they rely on unchanged battery pack IDs, leading to incorrect determination of genuine products.

Innovation Solution

A method that acquires and analyzes charge-discharge history data to calculate state quantities, such as full charge capacity and open circuit voltage, to determine authenticity by comparing pre and post-replacement values, providing a suspect rate indicating the probability of an imitation product.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If battery pack ID is used for authentication, then authentication process is simple, but imitation products cannot be detected when only battery cell is replaced

Engineering Contradiction:

Improveauthentication process complexityVSAvoidimitation product detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent changes the authentication parameter from battery pack ID to state quantity parameters (capacity, internal resistance, open circuit voltage) that reflect the actual physical condition of the battery. This allows detection of cell replacement while maintaining authentication functionality.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the electronic ID-based authentication system with a physics-based authentication system that measures actual battery characteristics through charge-discharge cycles, substituting mechanical/physical measurement for electronic identification.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If charge-discharge history analysis is performed, then imitation product detection accuracy is improved, but data processing complexity increases

Engineering Contradiction:

Improveimitation product detection accuracyVSAvoiddata processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent performs preliminary charge-discharge cycles to build a baseline state quantity profile before authentication. This preliminary action establishes reference data that simplifies subsequent comparison-based authentication processes.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The battery itself provides the authentication data through its inherent charge-discharge characteristics and state quantity responses. The system uses the battery's own physical behavior as the authentication mechanism, eliminating the need for external complex verification systems.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20230344243A1Battery authenticity determination method, battery authenticity determination device, and computer-readable recording medium recording a program

Publication Date: 2023.10.26 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

An acquisition unit acquires, regarding a battery that is a determination target, first data indicating a charge-discharge history in a first period and second data indicating a charge-discharge history in a second period before the first period, a calculation unit calculates a first state quantity indicating a state quantity of the battery in the first period based on the first data, and calculates a second state quantity indicating an estimated value of the state quantity of the battery in the first period based on the second data, a determination unit performs authenticity determination as to whether the battery is a genuine product or an imitation product in the first period based on the first state quantity and the second state quantity, and an output unit outputs a result of the authenticity determination.