1. Voltage protection capability

Overcharge protection: the lithium-ion battery protection board must have the ability to prevent the cell voltage from exceeding the preset value Over-discharge protection: the protection board must have the ability to prevent the cell voltage from falling below the preset value

2. Current capacity

As a safety protection device for lithium batteries, the protection board must not only work reliably within the normal operating current range of

the equipment, but also act quickly to protect the batteries when the battery is accidentally short-circuited or over-current.

3. On-resistance

Due to the high operating frequency of communication equipment, low bit error rate is required for data transmission, and the rising and falling edges of the pulse train are steep, so the current output capability and voltage stability of the battery are required to be high, so the MOS tube switch of the protection board is turned on When the resistance is small, the single cell protection board is usually <70m. If it is too large, the communication equipment will not work properly, such as the sudden disconnection of the mobile phone during the call, the phone cannot be connected, and noise and other phenomena.

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