The safety protection mechanism of Power Bank is crucial for the safety of users. The following are common safety protection mechanisms of Power Bank:
1. Overcharge protection. When the Power Bank is charging, if the battery is fully charged, continuing to charge may cause battery damage or even danger. The overcharge protection mechanism will automatically cut off the charging current when the battery is fully charged to prevent overcharging. It is usually achieved through a built-in charging management chip, which can monitor the battery voltage in real time and stop charging once the set full-charge voltage value is reached.
2. Over-discharge protection. When the Power Bank supplies power to external devices, the battery power gradually decreases. If over-discharged, it will cause irreversible damage to the battery. The over-discharge protection mechanism will automatically stop discharging when the battery power is too low to protect the battery. Similarly, this is also monitored and controlled by a special chip. When the battery voltage drops to a certain level, the output circuit is cut off to prevent the battery from over-discharging.
3. Short-circuit protection. If the output line of the Power Bank is short-circuited, a large amount of heat may be generated, and even dangerous situations such as fire may occur. The short-circuit protection mechanism can quickly detect the short-circuit state and immediately cut off the output current to prevent danger. Generally, it is achieved by detecting abnormal changes in the output current. Once the current is found to increase beyond the normal range, the protection measures will be quickly activated.
4. Temperature protection. During the charging and discharging process, the Power Bank may heat up due to factors such as current passing through and ambient temperature. If the temperature is too high, it may affect the battery performance and even cause safety accidents. The temperature protection mechanism monitors the temperature of the Power Bank in real time through the built-in temperature sensor. When the temperature exceeds the safe range, it will automatically adjust the charging or discharging current, or stop working to reduce the temperature and ensure safety.
5. Overcurrent protection. When the Power Bank supplies power to high-power devices or the output line is abnormal, the current may be too large. The overcurrent protection mechanism will automatically cut off the output current when the current exceeds the set value to prevent damage to the Power Bank or charging equipment due to excessive current.
6. Battery protection. High-quality Power Banks usually use high-quality batteries and provide multiple protections for the batteries. For example, explosion-proof and leak-proof battery designs are adopted, and protective structures are set around the batteries to prevent the batteries from being dangerous when they are impacted by external forces.
These safety protection mechanisms work together to ensure the safety of the Power Bank during use and provide users with a reliable charging solution.
