What is a lithium-ion battery pack protection board? How to test is good?

　　Author ：Iflowpower – Portable Power Station Supplier

The lithium-ion battery protective plate is a charge and discharge protection for a series lithium ion battery pack; which can ensure that the voltage difference between each unit cell is less than the set value (general ¡À 20mV), and realize the cell pack of each unit cell. Both charging, effectively improved charging effect in series charge mode; while testing overpressure, undervoltage, overcurrent, short circuit, overtemperature status, protection of various monomer batteries in battery packs; protecting battery life; undervoltage protection Make each single battery when discharging is used to damage due to over-discharge. The quality of the protective board has a great impact on the safety of the lithium-ion battery pack, so it is also very important for testing the quality of the protective board.

The composition of the lithium-ion battery pack has a lithium ion battery package that has been processed from the factory to be used by two parts, which is a lithium ion battery core and a protective plate. The lithium-ion battery core is important consisting of a positive electrode plate, a diaphragm, an anode plate, an electrolyte; the positive electrode plate, the diaphragm, the negative plate wound or laminated, packaged, perfused electrolyte, and is made into a battery after encapsulation. The use of lithium-ion battery protectors does not understand, lithium-ion battery protective board, as the name implies is to protect the lithium-ion battery pack, the use of lithium-ion battery protection board is to protect the battery, but fill, but flow, and Is output short circuit protection.

Protective Board Details Lithium Ion Battery Protection Board is important to protect the charge and discharge of lithium-ion battery packs. When the overflowing can effectively ensure that the voltage difference between the individual monomer lithium ion batteries is less than the value thereof, and the equalization charging of each unit cell of the lithium ion battery pack can effectively improve the lithium ion battery composed of string. Package charging effect.

At the same time, the protective plate can also test the overvoltage, undervoltage, overcurrent, short-circuit, over-temperature state of each monomer in the lithium-ion battery pack, and test these states, the protective plate can be adjusted and warned, protected. Board can effectively protect and extend the life of lithium-ion battery packs. The use of undervoltage protection is to prevent individual lithium ion batteries in lithium ion battery packs damage due to excessive discharge due to excessive discharge.

Protective panel quality 1, the function of the lithium-ion battery pack configuration of different manufacturers is not necessarily the same, some protector is designed to have thermistors for overheating lithium-ion battery packs. The thermistor on the protective plate is only supplied to the external circuit to supply a temperature sensor. If the protected plate circuit is poor, the lithium-ion battery is very susceptible to damage.

Therefore, check the circuit of the protector is the first step in our test protector. Second, the cable is used to determine the correctness of the cable wiring through the multimeter. By pressing the B-line terminal and multimeter red table pen pressing B1 line terminal with a meter black table pen, obtain the first string battery voltage.

Taking this way to measure all string parallel batteries in lithium ion battery packs. If the cable wiring is correct, and all battery string power supply is below a certain value, then the protective plate is used to protect the consistency of all batteries of lithium ion battery packs. Third, the measurement voltage is measured after the lithium-ion battery pack voltage confirms it normally, and the cable is inserted into the protective plate, measuring the resistance between the ports between the protective plates, if the resistance is zero, then explain the lithium-ion battery pack before unimpeded, The protective board has a good purpose.

When testing the lithium-ion battery pack protective plate, there are many places to pay attention to, for example, when measuring the voltage of each tantile ion battery, the form must be placed correctly, if you encounter a short-circuition smoke. When connecting the protector, be sure to pick up the cable and then insert the protector. If you don't pick up the cable and then insert the protector, it is likely to cause the protector being burned.