Overcharge protection is a key technology in rechargeable emergency lights, designed to ensure that the battery is not overcharged during charging, causing performance degradation, safety hazards or damage.

The principle of overcharge protection
Overcharge protection is achieved through a series of electronic control and monitoring systems. In rechargeable emergency lights, a dedicated charging management chip or battery management system (BMS) is usually integrated. These systems are responsible for real-time monitoring of key parameters such as battery voltage, temperature and charging current to ensure safety and stability during the charging process.

Battery voltage monitoring
Overcharge protection first focuses on the voltage of the battery. When the battery voltage reaches the preset upper limit, the overcharge protection system will immediately take measures to stop battery charging. This prevents the battery from continuing to draw current and causing overcharge, thereby improving battery safety and stability.

Charging current control
In addition to voltage monitoring, the overcharge protection system also monitors the battery's charging current. When the current reaches or exceeds the safety threshold, the system will limit the charging current or stop charging to prevent the battery from overheating due to overcharging, slow down the aging of the battery, and extend the life of the battery.

Temperature monitoring and control
Temperature is another important factor affecting battery safety. Overcharge protection systems are usually equipped with temperature sensors to monitor battery temperature changes. If the temperature rises to unsafe levels, the system will take steps, such as reducing charging current or pausing charging, to prevent the battery from overheating.

Intelligent charging management system
Some advanced rechargeable emergency lights may feature intelligent charge management systems that can learn and adapt to the charging characteristics of the battery. This system can dynamically adjust based on the battery's status and historical charging records to improve the accuracy and efficiency of overcharge protection.