802540 battery.Analysis of repair technology of lithium battery for electric vehicles

　　Everyone may have doubts about the technology of repairing and repairing lithium batteries, because everyone thinks that the performance of lithium batteries has weakened, the range has decreased, the battery cannot be charged, etc. As long as problems arise, the battery can no longer be used. To be replaced. Because not only can the lithium battery of electric vehicles be repaired, but its performance after repair can be restored to more than 90%. 18650 lithium battery repair method The life theory of 18650 lithium battery is 1000 cycles of charging. Due to the large capacity per unit density, most of them are used in laptop batteries. In addition, because 18650 has very good stability at work, it is widely used in various electronic fields: often used in high-end bright flashlights, portable Power supplies, wireless data transmitters, electric thermal clothing and shoes, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc. The principle of lithium battery repair method one: the metal surface of lithium batteries used for a long time will be oxidized to a certain extent, resulting in poor contact between the mobile phone battery and the mobile phone, and the lithium battery usage time will be shortened. However, it can be wiped with a rubber wiper or other cleaning tools. Remove the rusty material on the surface and improve the contact between the battery and the mobile phone. The principle of the second method of lithium battery repair: low temperature can cause the electrolyte inside the 18650 lithium battery to change, promoting the chemical reaction of the battery that has just been frozen. The use process of lithium battery is actually a charging and discharging process. During this time, the negative and positive charges in the battery collide with each other. The reason why batteries become less and less durable is because at normal room temperature, the internal kinetic energy of electrons is relatively large, so the battery is in an active state and leakage is relatively frequent. When a lithium battery is placed in a low-temperature environment, the microstructure of the lithium film and the electrolyte on the surface of the lithium battery, as well as their interface, will undergo significant changes, resulting in temporary inactivity inside the battery and reduced leakage current. Therefore, after charging again, the battery life of the mobile phone will increase. The principle of the third method of lithium battery repair: Deep discharge of the mobile phone is to achieve a deeper recharge by depleting the internal power, which requires some unconventional methods. Find a way to connect the mobile phone to a small 1.5V light bulb. The power inside the 18650 lithium battery will be transferred to the small light bulb until all the light is emitted. 1. Take out your 18650 lithium battery after all use, and use temperature treatment. The battery will greatly shorten the use time when the temperature is unstable, because the battery has no electricity and a considerable part of the lithium ions already have memory cells. In this way, part of the memory power can be discharged. When winter comes, put it outside for a while and then put it inside the house. 2. There is another way to remove the battery and leave it for about a week to slowly consume the power. You need to use a machine to completely consume the power first. Then charge it fully. I guess your current charging time must be very short. After charging it completely, disconnect it and charge it again. Repeat it several times. It will definitely be effective. Repair method of electric vehicle lithium battery 1. If the electric vehicle lithium battery pack cannot work normally due to damage to the lithium battery protection plate, this problem can be solved simply by replacing the lithium battery protection plate to restore the power performance of the lithium battery; 2. If the performance of the battery is reduced due to vulcanization, you need to use a lithium battery repair instrument to eliminate the vulcanization process; 3. If the lithium battery pack of an electric vehicle cannot work normally because the voltage difference between the lithium battery packs in series is reduced, the entire lithium battery pack will Or the discharge function of a single string lithium battery decreases, and the voltage inconsistency causes the function of the electric vehicle lithium battery to decrease, performance weakens and other faults. Generally, users or maintenance service points replace the battery. This relative cost is high. If you use Shineng and The lithium battery pack voltage balance repair instrument can quickly solve the problem. The lithium battery voltage balance repair instrument is a comprehensive instrument that integrates the functions of entire battery pack discharge, single string discharge, automatic pressure difference repair, etc. It can quickly repair lithium Battery, restore lithium battery to its best condition. Electric vehicle lithium battery repair technology From the structure of the electric vehicle lithium battery, the electric vehicle lithium battery is mainly composed of lithium cells, protective plates and related auxiliary materials. Common lithium battery failures are that the battery has no output, the battery cannot be charged, and the battery cannot be charged. Problems such as insufficient charging and low battery life. However, these problems are mainly caused by the damage of the lithium battery protection plate itself and the damage and shrinkage of the lithium battery core. Technically speaking, these common faults are completely repairable. 1. Many electric vehicle lithium batteries seem to be no longer usable. In fact, we do not really understand them. First, we need to use a lithium battery balance repair instrument to detect the battery voltage, discharge and voltage difference to identify which part or which part. The battery is damaged causing the entire battery pack to malfunction. 2. After detecting the root cause of the fault, use a balance repair instrument for technical treatment. Generally, for lithium batteries, the problem is mostly due to damage to the lithium battery protection plate or damage to the lithium battery cell. If the protection plate is damaged, , you only need to replace the protective board. If the battery core function is damaged, you need to use Shineng and lithium battery balance repair instrument to repair the lithium battery voltage difference so that each string of the battery pack can be fully charged. At the same time, Discharging can also maximize the use of stored power. 3. The common balancing charge on the market is to directly charge the voltage difference of each string of the battery pack to 4.2v, which is a high-voltage repair. After a discharge cycle based on this repair principle, the battery pack voltage difference will still exist, and it needs to be charged every time. After discharging, it must be repaired again. The voltage balancer performs low-voltage balance repair by using the entire battery pack discharge and single string discharge to allow the voltage of each string to reach the lowest value protected by the protection board, and then use the highest string voltage in the entire battery pack as a reference value, which is a low-voltage repair. , so repairing it once can guarantee long-term use and cure the symptoms. The above is the lithium battery repair method. Electric vehicle lithium battery repair technology. As long as you master the full set of lithium battery technology and a complete set of lithium battery detection and repair instruments, you can easily repair lithium batteries. To repair lithium batteries, you need to first screen the voltage. , current, protective board, connecting wires, welding points, whether there is water ingress, length of use, etc. The more difficult thing to repair is the voltage drop.

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