Battery Module Voltage Reduction Under High-Charge Heat Stress
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Solution Overview
Problem
Batteries in handheld electronic devices are prone to damage and reduced service life due to decomposition of electrolyte solvent in high-charge or high-temperature environments, leading to excessive gas generation and swelling.
Innovation Solution
A battery module with a control circuit and charge control chip that detects abnormal conditions and adjusts charging voltage to prevent damage by discharging the battery cells sequentially when exposed to high-charge or high-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery cell is operated in a high-charge or high-temperature and high-charge environment, then the charging voltage is maintained at a high level, but the electrolyte solvent decomposes and produces carbon dioxide gas causing excessive gas generation and swelling
Solution Approach 1:
The control circuit proactively monitors battery temperature and charge state before dangerous conditions develop. When abnormal environmental conditions are detected (high temperature combined with high charge), the system preemptively adjusts the charging voltage downward through the charge control chip, preventing electrolyte solvent decomposition and gas generation before they occur
Solution Approach 2:
The control circuit continuously monitors battery temperature and charge state, providing real-time feedback to the charge control chip. Based on this feedback about abnormal environmental conditions, the system dynamically adjusts the charging voltage to maintain safe operating parameters and prevent harmful effects
2Power
If the charging voltage is not immediately lowered or the battery cell is not removed from the high-charge or high-temperature and high-charge environment in a timely manner, then the battery continues to operate at high power, but permanent damage to the battery occurs and service life is shortened
Solution Approach 1:
The control circuit establishes predetermined abnormal environmental conditions thresholds and preemptively triggers voltage reduction when these conditions are detected, preventing permanent battery damage before it occurs. The system acts in advance rather than waiting for damage to manifest
Solution Approach 2:
The control circuit continuously monitors battery parameters and provides real-time feedback to adjust charging voltage dynamically. This closed-loop control ensures the battery is removed from harmful high-charge or high-temperature environments in a timely manner, preserving battery service life
3Reliability
If the charging voltage is flexibly adjusted when the battery module is operated in an abnormal environment, then the battery cell pack is separated from the high-charge or high-temperature and high-charge environment in time, but the charging process becomes more complex
Solution Approach 1:
The control circuit autonomously monitors battery conditions and automatically triggers voltage adjustment through the charge control chip without requiring external intervention. The system serves itself by detecting abnormal environmental conditions and independently implementing protective voltage reduction
Solution Approach 2:
The control circuit integrates multiple functions including temperature monitoring, charge state detection, abnormal condition determination, and charging voltage adjustment control. This multi-functional integration achieves comprehensive battery protection while minimizing the number of separate components needed
Data Source
AI summary
An electronic apparatus and a battery protection method thereof are provided. electronic apparatus includes a battery module, a charge control chip, and a controller. The battery module includes a battery cell pack and a control circuit. The control circuit is configured to detect and treat a temperature of the battery cell pack as a battery cell temperature and determines whether the battery module meets any one of a plurality of abnormal environmental conditions according to the battery cell temperature and stored power of the battery cell pack. When the battery module meets any one of the abnormal environmental conditions, the control circuit provides a corresponding recommended charging voltage reduction value. The charge control chip is configured to provide a charging voltage to the battery module. The controller is configured to obtain the recommended charging voltage reduction value and accordingly adjusts the charging voltage through the charge control chip.