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Technical specifications of lithium-ion battery protection board

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. Overdischarge 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-ion batteries, the protection plate 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 cells.

3. Conduction resistance

Due to the high operating frequency of communication devices and the low error rate required for data transmission, as well as the steep rise and fall edges of their pulse trains, high requirements are placed on the current output capacity and voltage stability of the battery. Therefore, the resistance of the MOS switch of 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 the communication device, such as sudden disconnection of the phone during a call, disconnected phone, noise, and other phenomena.

4. Self consumption current

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

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

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

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