Dynamic Charging Voltage Control for Battery Swelling Prevention
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Solution Overview
Problem
Electronic devices can experience battery swelling due to overcharging when connected to a power transmitting device, leading to reduced usage time, and existing solutions that limit charging to a predetermined level (e.g., 80-85%) may not effectively prevent swelling while maintaining battery performance.
Innovation Solution
An electronic device with a processor-controlled charging circuit that adjusts the voltage for charging based on the number of supplementary charges and connection time to a power transmitting device, gradually lowering the charging voltage when supplementary charging exceeds a specified number of times or duration, thereby preventing battery swelling and extending device usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery is charged to a predetermined level (80-85%) to prevent swelling, then battery safety is improved, but device usage time is shortened
Solution Approach 1:
The charging level is made dynamic rather than fixed. The system automatically adjusts the charging level based on the number of supplementary charging events and connection duration, transitioning from a static 80-85% limit to a flexible threshold that adapts to actual usage patterns, thereby resolving the contradiction between safety and usage time
Solution Approach 2:
The patent changes the parameter of charging level threshold based on operational conditions. By monitoring supplementary charging frequency and connection time, the system modifies the charging threshold parameter dynamically, allowing higher charging levels when safe and lower levels when risk increases, thus balancing safety and usage time
2Productivity
If supplementary charging is performed multiple times after full charge, then battery capacity utilization is improved, but battery swelling risk increases
Solution Approach 1:
The system implements feedback control by monitoring the number of supplementary charging events and connection duration, then using this information to adjust the charging level threshold. This closed-loop feedback mechanism prevents excessive supplementary charging that could cause swelling while still allowing adequate capacity utilization
Solution Approach 2:
The system takes preliminary action by establishing charging level thresholds before swelling can occur. By proactively limiting charging levels based on detected charging patterns, the system prevents the harmful effects of overcharging while maintaining safe capacity utilization
Data Source
AI summary
An electronic device is provided. The electronic device includes a charging circuit, a battery, and a processor operatively connected to the charging circuit and the battery, wherein the processor is configured to charge the battery with a first voltage corresponding to a first charging level, identify the number of times that supplementary charging is performed after the electronic device is detected to be in a fully-charged state, when the number of times that the supplementary charging is performed exceeds a specified number of times, configure a charging level for charging the battery to a second charging level configured to be lower than the first voltage of the first charging level, and adjust a voltage received from a power transmission device through the charging circuit to a second voltage corresponding to the second charging level and charge the battery with the adjusted second voltage.