Battery State Determination via Temperature Accumulation
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Solution Overview
Problem
Lithium ion batteries in electronic devices, such as mobile phones, have their chemical activity and service life significantly influenced by temperature, with existing high-temperature protection measures only applicable during charging and lacking comprehensive protection during daily use or storage, leading to battery aging and reduced lifespan.
Innovation Solution
A method to determine the battery state by obtaining an environment temperature sequence over a preset time period, calculating accumulated duration above a threshold, and adjusting the charging mode to mitigate the impact of prolonged high temperatures on battery health, thereby extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature protection measures are implemented during charging, then battery safety is improved, but comprehensive protection during daily use or storage is lacking leading to battery aging
Solution Approach 1:
The patent extends the temperature monitoring and protection mechanism from solely charging scenarios to cover daily use and storage scenarios as well. The same temperature detection unit and processing unit are utilized across all three scenarios (charging, daily use, storage), creating a universal protection system that comprehensively safeguards the battery regardless of its operational state, thereby resolving the contradiction between charging-specific safety and comprehensive protection coverage
2Productivity
If charging speed is increased to meet high capacity requirements, then productivity is improved, but battery service life is reduced due to heating effects
Solution Approach 1:
The patent implements a feedback mechanism where the processing unit continuously receives temperature data from the detection unit during charging operations. When high temperature is detected, the system automatically adjusts charging parameters (such as reducing charging current or暂停 charging) to prevent excessive heating. This closed-loop feedback control allows the system to maintain high charging speeds when temperatures are normal while automatically mitigating thermal effects when temperatures rise, thus resolving the contradiction between charging speed and battery service life
Data Source
AI summary
A determination method for a battery state, the method includes: obtaining an environment temperature sequence of an environment where a battery is located in a preset time period, the environment temperature sequence including: a plurality of environment temperatures corresponding one-to-one to a plurality of time nodes; determining, according to the time nodes corresponding to the plurality of environment temperatures of the environment temperature sequence, accumulated duration that the environment temperatures greater or equal to at least one environment temperature threshold; determining a state of health of the battery according to the accumulated duration and a reference duration threshold; and determining, under the condition that the battery is in an unhealthy state, a regulation strategy for a charging mode, so as to charge the battery based on the adjusted charging mode.