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Of course, if the designed lithium-ion battery protection board is not good, it will damage the battery, but the purpose of the protection board is to protect the battery and prevent safety issues, so it is still in use now. For example, lithium-ion batteries are not afraid of overcharging, and are not afraid of time to consider not using the protection board!

The important function of lithium-ion battery protection board is to protect the rechargeable battery, maintain the safety and stability of the battery during charging and discharging, and play an important role in the performance of the entire battery circuit system.

1. Overcharge protection function: Overcharge protection function refers to prohibiting the charger from continuing to charge when the charger reaches a certain voltage (hereinafter referred to as overcharge detection voltage). Turn off the overcharged MOS transistor and stop charging.

2. Over discharge protection function: The over discharge protection function stops discharging when the voltage of the lithium-ion battery is low. Turn off the MOS tube to control over discharge and prevent it from discharging. This process is exactly the opposite of the overcharge detection process.

3. Overcurrent protection function: The overcurrent protection function stops discharging when a large current is consumed. The purpose of this function is to protect the battery and MOS transistor, ensuring the safety of lithium-ion batteries in working conditions. After overcurrent detection, the battery returns to normal after being unloaded and can be charged and discharged.

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