Lithium battery protection board principle -Lithium - Ion Battery Equipment
Lithium -ion battery protection board is important for integrated circuit boards for protection (generally referring to lithium -ion batteries). The reason why lithium -ion batteries are protected by its own characteristics. Because the material of the lithium ion battery itself determines that it cannot be charged, over -the -LE, overcurrent, short -circuit and ultra -high temperature charging, lithium -ion battery lithium battery components will always appear with a delicate protective board and a current insurance device.
Due to the chemical characteristics of lithium ion batteries, in the normal use process, the chemical positive reactions of electrical energy and chemical energy can be transformed inside. After the incidence of chemical reactions in the interior, after the extension of the sub -reaction, it will seriously affect the performance and service life of the battery, and may have a large amount of gas, which causes a large amount of gases to increase the internal pressure of the battery and explode and cause safety problems.(Lithium - Ion Battery Equipment)
Therefore, all lithium -ion batteries must be a protective circuit for effectively monitoring the battery charging and discharge status, and cut off the charging and discharge circuits under certain conditions to prevent damage to the battery.
How to repair the lithium -ion battery protection board?
1. No voltage or abnormal voltage
Without the case of abnormal voltage or voltage, we should adjust the multimeter to the 20 -volt gear of the DC, and then use a red meter pen to contact the lithium -ion battery battery cells in the positive pole. Low, then it proves that the battery is damaged.
Second, no overcurrent protection
If there is no overcurrent protection and other phenomena, you must first check whether the circuit of the overcurrent detection foot is bad, and if some, change the protection IC.
Third, there is no resistance or excessive resistance
The reason for the recognition circuit of the resistance pads will be found, and the reason for the recognition resistance is detached, whether the resistance is pasted, whether there is a short circuit or opening the road.
Fourth, no internal resistance or excessive internal resistance
1. If there is no internal resistance, check whether the pin of the MOS tube is damaged.
2. If the internal resistance is too large, then use a probe to contact the lithium fish lithium -ion battery protection board to detect whether there are poor contact or excessive oxidation. It is also necessary to check whether there are more nickel sheets on the battery cell. If there is too much nickel tablet on the battery cell, it will also cause excessive internal resistance.
Due to the chemical characteristics of lithium ion batteries, in the normal use process, the chemical positive reactions of electrical energy and chemical energy can be transformed inside. After the incidence of chemical reactions in the interior, after the extension of the sub -reaction, it will seriously affect the performance and service life of the battery, and may have a large amount of gas, which causes a large amount of gases to increase the internal pressure of the battery and explode and cause safety problems.(Lithium - Ion Battery Equipment)
Therefore, all lithium -ion batteries must be a protective circuit for effectively monitoring the battery charging and discharge status, and cut off the charging and discharge circuits under certain conditions to prevent damage to the battery.
How to repair the lithium -ion battery protection board?
1. No voltage or abnormal voltage
Without the case of abnormal voltage or voltage, we should adjust the multimeter to the 20 -volt gear of the DC, and then use a red meter pen to contact the lithium -ion battery battery cells in the positive pole. Low, then it proves that the battery is damaged.
Second, no overcurrent protection
If there is no overcurrent protection and other phenomena, you must first check whether the circuit of the overcurrent detection foot is bad, and if some, change the protection IC.
Third, there is no resistance or excessive resistance
The reason for the recognition circuit of the resistance pads will be found, and the reason for the recognition resistance is detached, whether the resistance is pasted, whether there is a short circuit or opening the road.
Fourth, no internal resistance or excessive internal resistance
1. If there is no internal resistance, check whether the pin of the MOS tube is damaged.
2. If the internal resistance is too large, then use a probe to contact the lithium fish lithium -ion battery protection board to detect whether there are poor contact or excessive oxidation. It is also necessary to check whether there are more nickel sheets on the battery cell. If there is too much nickel tablet on the battery cell, it will also cause excessive internal resistance.
