Lithium-ion batteries must require a circuit protection board. The protective board plays a vital role in lithium-ion batteries. Its main functions include preventing the battery from overcharging, over-discharging, over-current, short circuit and excessive temperature.

When the battery voltage exceeds the charging limit voltage, the protection board will immediately cut off the charging circuit to prevent the battery from overcharging. Similarly, when the battery voltage is lower than the discharge limit voltage, the protection board will immediately cut off the discharge circuit to prevent the battery from over-discharging. In addition, the protection board can also detect the current in the battery pack. Once the current exceeds the limit current, the protection board will immediately cut off the battery pack circuit to prevent short circuit and overcurrent. Moreover, the protection board can also detect the temperature of the battery pack. Once the temperature exceeds the limit temperature, the protection board will immediately cut off the battery pack circuit to prevent excessive temperature damage to the battery.

In summary, lithium-ion batteries must be equipped with circuit protection boards to ensure their safe use and avoid battery damage and safety accidents.

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