How to activate the lithium-ion battery protection board?

The protection function of lithium-ion battery is usually completed by the protection circuit board and current devices such as PTC. The protection board is composed of electronic circuits, which can accurately monitor the voltage and charge and discharge circuit of the cell at all times under the environment of -40℃ to +85℃ It can control the on and off of the current loop in time; PTC prevents severe damage to the battery under high temperature environment.

Now not all lithium-ion battery protection boards need to be activated, but some protection ICs need to be activated, and this is the old IC method, the old IC method. This is why this is done to make the protection board inoperative and reduce Electrostatic discharge energy, so that lithium-ion batteries can be stored longer. This is why the design is activated by charging.

If the lithium-ion battery protection board due to current limiting protection, it may be activated after charging or completely disconnecting the load, it will be more troublesome, but B- (battery negative) and P- (discharge negative) can also be shortened If you touch it, the protection will be released. Remember not to carry a large load when you short the connection (such as turning it and twisting it all the time), otherwise there may be a lot of sparks. The fundamental reason is that the two ends of the discharge MOS are formed after the protection. Larger voltage difference, a short-circuit touch will directly reset the DS level of the discharge MOS to 0V, and the protection is released at this moment.

If the protection board may be activated after charging or disconnecting the load completely due to current limiting protection, it will be more troublesome, but you can also short-circuit B- (battery negative) and P- (discharge negative). , The protection will be released. Remember not to carry a large load when shorting the connection (such as turning it and twisting it all the time), otherwise there may be a lot of sparks. The fundamental reason is that a large voltage is formed at both ends of the discharge MOS after the protection. Bad, a short touch is to directly reset the DS level of the discharge MOS to 0V, and the protection is released at this moment.