How to check the quality of lithium battery protection board?

How to activate the lithium battery protection board? The field effect transistor used as a protection element in the lithium battery protection board. Carry out special circuit planning to ensure that the battery will not be inserted into the circuit from the beginning in the event of a failure. The method is that the circuit power supply of the protection control part is behind the utility tube that protects the power supply, and the circuit will work as long as the protection tube is normally conductive. Therefore, after the protection or attack is used for the first time, since the power supply of the subsequent circuit is disconnected, the circuit has no power supply, and the protection circuit cannot work. The battery has no output. At this time, as long as the battery is connected to the charger, the charger can be used to protect the power supply of the control circuit part of the circuit, and the electric work of the control circuit part can be used normally. Lithium battery protection board activation method: Assuming that the protection board is due to current limiting protection, it may be activated to completely disconnect the load after charging is activated. It is relatively more troublesome, but it can also be touched by B- (battery) and P- (discharge) The protection of the nipples will be announced. Please remember that when you touch the nipple, remember not to carry a large load (such as the transmission is over), otherwise you may have a big spark. The basic reason is to protect the two ends of a large pressure difference. After the metal oxide semiconductor is discharged, a touch nipple discharge is the DS level of the metal oxide semiconductor is directly reset to 0 volts and then released. Now not all lithium battery protection boards need to be activated, but some protection integrated circuits need to be activated. This is the old IC program. The requirement of the old integrated circuit project is to make the protection board not work, in order to reduce the electrostatic discharge energy, in order to It is a bit long to store lithium batteries. This is why you plan to recharge and activate. How to check the quality of the lithium battery protection board? Use a multimeter to confirm that the battery wiring is correct; when the measured voltage is normal, insert the wire into the protection board, and measure the resistance between the protection board B- and P-. If the resistance is 0, it means that the protective plate is good. Measure the voltage between B- and the total positive terminal of the battery and the voltage between P- and the total positive terminal of the battery by connecting the B line. When voltage is applied, the protection board is normal (the protection board is equivalent to a switch, the switch is rotating, and the current can pass safely). The two voltages added together indicate that the protection board is normal. Assuming that when the P-discharge passes a large current, there will be a slight voltage drop, and the protection board will heat up (about 50 degrees) and return to normal. Precautions in the detection of lithium battery protection board 1. When measuring the voltage of each series, the instrument pen is correctly placed, and when one of them is touched, short-circuit and smoke; 2. When connecting the protection board, be sure to connect the line first and then insert the protection If the protective plate is inserted properly, the protective plate may burn out. The lithium battery of the safety protection device and the packaging of the lithium battery protection board must not only be able to work reliably in the current plan of normal operation of the equipment, but also can activate the battery when the battery is accidentally short-circuited or overloaded, so that the battery is protected. With the widespread use of lithium batteries, protective plates for lithium battery packs have become more and more important. The chemical characteristics of the lithium battery itself determine that we must protect the voltage. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.