Lithium battery protection board activation method

Why do some lithium battery protection boards need to be activated?

Now not all lithium battery protection boards need to be activated, some protection ICs need to be activated, and this is the old IC solution. The old IC solution needs to do this in order to make the protection board not work to reduce static electricity. Discharge energy, so that the lithium battery is stored a little longer. This is why the design requires charging activation.

The field effect transistor used in the lithium battery protection board is used as a protection element. The circuit is specially designed to ensure that the battery will not be reconnected to the circuit when it is abnormal. The method is that the power supply of the control part of the protection circuit is powered after the protection field effect transistor, and the circuit only works after the protection tube is normally turned on. Therefore, after the first use or after the protection has been generated, the protection circuit is inoperable because the power of the subsequent circuit is disconnected and the circuit has no power. The battery has no output. At this time, only the battery is connected to the charger, and the charger is used to supply power to the control circuit of the protection circuit, and the control part is powered, and the battery can be used normally.

How to activate the lithium battery protection board

If the protection board is activated after the current limit protection, it may need to be activated by charging or after the load is completely disconnected, it is relatively troublesome, but you can also short-circuit B-(battery negative) and P-(discharge negative). The protection will be released. Remember to avoid carrying a large load when you touch it shortly (for example, turn it all the time), otherwise it may cause a lot of sparks. The root cause is the large differential pressure across the MOS after protection. The short touch is to directly reset the DS level of the discharge MOS to 0V and the protection is released at this moment.

Note: It should be that most of the boards are common, even if some do not work, this will not cause damage to the board.

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