Introduction To The Use of Lithium Iron Phosphate Battery Protection Board

1. Voltage protection capability

Overcharge protection: The lithium iron phosphate battery protection board must have the ability to prevent the voltage of the battery cell from exceeding the preset value. Overdischarge protection: The protection board must have the ability to prevent the voltage of the battery cell from falling below the preset value

2. Current capability (overcurrent protection current, short circuit protection)

As a safety protection device for lithium-ion batteries, the lithium iron battery protection board should not only work reliably within the normal operating current range of the equipment, but also act quickly in case of accidental short circuit or overcurrent of the battery, so as to protect the battery cell

3. Conduction resistance

Meaning: When the charging current is 500mA, the conduction impedance of the MOS transistor. Due to the high operating frequency of communication devices, data transmission requires a low bit error rate, and the rising and falling edges of their pulse trains are steep. Therefore, high requirements are placed on the current output ability and voltage stability of the battery. Therefore, the resistance of the MOS transistor switch on the protection board should be small when conducting, and the single cell protection board is usually less than 70m. If it is too high, it can cause abnormal operation of communication devices, such as sudden disconnection of mobile phones during calls, inability to connect to the phone, noise, and other phenomena

4. Self consumption current

Meaning: The working voltage of the IC is 3.6V. In the no-load state, the working current flowing through the protection IC is generally very small. The self consumption current of the lithium-ion protection board directly affects the standby time of the battery, and it is usually stipulated that the self consumption current of the protection board is less than 10 microamperes

5. Mechanical performance, temperature adaptability, and anti-static ability

The protection board of lithium iron phosphate batteries must be able to pass the vibration and impact tests specified in the national standard; The lithium battery protective board can work safely at -40 to 85 degrees Celsius and withstand± 15KV non-contact ESD electrostatic testing

The lithium iron phosphate battery protection board has the function of protecting the battery and preventing overcharging.

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