Battery Pack Improper Charge Detection via Waveform Analysis
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Solution Overview
Problem
Battery packs used in vehicles like electric motorcycles or bicycles face premature degradation due to improper charging methods, such as quick charging with unauthorized chargers, leading to reduced service life and potential compensation claims.
Innovation Solution
A battery pack system equipped with an input component, current and voltage measurement component, and an improper charge detector that compares measured current and voltage values with reference values from a designated charger to detect and prevent high-load charging methods, using waveform or frequency analysis to determine if charging is improper, and communicates detection results to the business owner or cloud service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If quick charging or improper charging method is used, then charging speed is improved, but battery pack service life is shortened
Solution Approach 1:
The battery pack performs preliminary detection of charging current and voltage characteristics before charging completes, comparing measured values against stored reference data from proper charging methods. This preliminary assessment allows the system to identify improper charging attempts early in the charging process, before significant damage occurs to the battery pack, thereby preventing service life shortening while still allowing quick charging when appropriate
Solution Approach 2:
The system establishes a feedback mechanism where charging current and voltage are continuously measured during charging, compared against reference data from proper charging methods, and used to generate detection results that are communicated to external devices. This feedback loop enables real-time monitoring and identification of improper charging methods, allowing the system to respond appropriately to protect battery pack service life
2Reliability
If vehicle function permission system is implemented, then battery pack protection is improved, but detection and restriction capability is insufficient
Solution Approach 1:
The battery pack performs self-detection of improper charging by autonomously measuring its own charging current and voltage, comparing these measurements against stored reference data from proper charging methods, and generating detection results without requiring external detection systems. This self-service approach enables the battery pack to protect itself against improper charging methods, improving reliability while providing sufficient detection capability through direct measurement and comparison
Data Source
AI summary
A battery pack (10) is a battery pack that is charged by a charger, and includes an input component (11) to which current and voltage are applied from the charger, and a current and voltage measurement component (12) that measures the current and voltage inputted to the input component (11).