Adaptive Battery Charging Thresholds for Swelling and Lifespan Control
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Solution Overview
Problem
Battery expansion due to high temperature and high voltage conditions reduces its lifespan and can cause deformation, damage, and safety hazards in devices, necessitating a method to slow down expansion and prolong battery life.
Innovation Solution
A charging management method that monitors and adjusts charging parameters based on the battery's working parameters, such as temperature and voltage, by stopping charging when specific conditions are met to reduce the expansion rate and prolong the battery's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If charging continues at high voltage to maximize battery capacity utilization, then energy storage increases, but battery expansion accelerates and lifespan decreases
Solution Approach 1:
The patent implements dynamic charging management by continuously monitoring battery voltage and adjusting charging parameters in real-time. The system transitions from static charging to dynamic control, adapting charging voltage and current based on real-time battery state to prevent excessive voltage exposure that causes expansion while maximizing energy utilization within safe limits.
Solution Approach 2:
The patent changes operating parameters by implementing variable voltage thresholds (V1 and V2) based on battery working duration and temperature conditions. The system dynamically adjusts charging voltage limits and stops charging at different voltage points depending on accumulated working parameters, thereby controlling the battery's exposure to high-voltage states and reducing expansion rate while optimizing energy storage.
2Reliability
If charging is stopped early to prevent battery expansion, then battery lifespan is prolonged, but energy storage efficiency decreases
Solution Approach 1:
The patent applies partial action by stopping charging at voltage threshold V2 (lower than maximum possible voltage V1) under certain working conditions. This partial charging approach prevents the battery from reaching extreme high-voltage states that cause rapid expansion, sacrificing some energy storage capacity to significantly extend battery lifespan and reduce expansion rate.
Solution Approach 2:
The patent implements feedback control by continuously monitoring battery voltage, temperature, and working duration, then adjusting charging termination points accordingly. The system uses feedback from accumulated working parameters to dynamically determine when to stop charging, balancing energy storage efficiency with battery protection to optimize both charging productivity and long-term reliability.
3Object-affected harmful factors
If charging parameters are strictly controlled to reduce expansion, then battery safety improves, but charging time increases
Solution Approach 1:
The patent implements periodic monitoring and control of charging parameters based on accumulated working duration and temperature cycles. The system periodically evaluates whether voltage threshold V2 should be applied based on working parameter thresholds, creating a rhythm of controlled charging interruptions that prevent expansion without requiring continuous conservative charging, thereby reducing overall charging time compared to always using the most conservative parameters.
Data Source
AI summary
A charging management method includes charging the battery, stopping charging the battery when a first battery voltage of the battery reaches V1, and displaying prompt information when a working parameter of the battery meets a first condition. The working parameter is first working durations of the battery at a plurality of temperatures, or second working durations of the battery at a plurality of second battery voltages.