Introduction to lithium battery repair methods

Analyze the lithium battery's pressure difference damage and the maintenance methods of the lithium battery. The cycle life, gram-capacity ratio, light weight, and no memory of the lithium battery have been analyzed. It has gradually replaced lead-acid batteries and is increasingly used in electric bicycles. On; However, because lithium batteries are a new type of battery, many consumers or companies know little about lithium batteries. Therefore, once the lithium battery fails, the only way is to replace it, which greatly increases the cost of customers and also forms a waste of social resources. I have more than ten years of processing-related experience in the lithium battery industry, repairing a large number of lithium batteries, and after accumulating relevant experience in operation, I have explored a set of effective lithium battery repair methods. Hope that through this brief analysis, more people can re-recognize lithium batteries. What is a lithium battery? The negative electrode of a lithium battery is lithium metal, and the positive electrode is a carbon material. According to our naming convention, we call this battery a lithium battery. There are many lithium batteries. If you look at the data system, there are ternary lithium, lithium manganese, and lithium iron phosphate; from the perspective of battery application, there are capacitive, multiplier, and high multiplier types; from the use environment, they are divided into: High-temperature lithium electronics, low-temperature lithium batteries; from the appearance there are: steel shell, polymer, square, 18650, 26650, etc., I can't list them all here, let's talk about the application of lithium batteries in electric bicycles . At present, the lithium batteries used in electric bicycles mainly include ternary lithium batteries and lithium iron phosphate batteries, 18650 cylinders and polymer soft packs, but the important flow rate is 18650 cylinder ternary lithium. The operating voltage range of the ternary lithium battery is 2.5V to 4.2V, the rated voltage is 3.6V, and a large number of batteries are combined in series on the basis of the voltage and capacity requirements of the lithium battery pack. For example, a battery capacity of 2 ah, if you want to assemble 36V/10a battery pack, you will need 5, then this string 10, a total of 5018650; lithium batteries are most afraid of overcharging and overdischarging, so the battery pack and external power supply circuit must go through a maintenance circuit, which limits the up and down work of the battery Voltage. The multi-battery series requires high battery consistency, that is, the capacity, internal resistance and discharge channel of a single 18650 battery are the same; but then again, the same two leaves can never be found in the world, so it is impossible to make the same battery. We A certain distance is allowed, but the standards of each manufacturer are different, so the quality is good or bad. How bad is the battery consistency? For example, for a 36V battery pack, due to a series of reasons during the charging process, when the charging time has reached the 4.2V maintenance value, the maintenance board's charging function will be turned off, even if other batteries’ The voltage is still 3.9V and cannot make up for the capacity. When discharging, when the capacity is low, the lower limit of the maintenance voltage will be reached first. Even if the battery capacity is not released, the maintenance board will close the discharge function. This is the short board effect! In this way, we can understand that the pressure difference will form the battery The overall performance of the bag is mainly reflected in phenomena such as shortened stroke, cyclic power failure, and charging. So how to change this phenomenon caused by battery pressure difference? In addition to choosing good batteries and matching them consistently when making battery packs (this customer cannot decide). When the above phenomenon occurs in the customer's car, the only thing we can do is to correct the battery pressure difference, use the world energy lithium battery pressure difference balance corrector to balance the battery pressure difference, and let the battery return to the factory pressure difference statement : Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete the previous article: Three logic behind the lithium battery outbreak