Lithium battery repair method, electric vehicle lithium battery repair technology

Lithium battery repair method, electric vehicle lithium battery repair technology. Everyone may have doubts about the maintenance and repair technology of lithium batteries, because they all feel that lithium batteries have weakened performance, attenuated travel, and no longer charge properly. As long as problems such as these occur, the battery is no longer usable and needs to be replaced. Because electric vehicle lithium batteries are not only repairable, but also can recover over 90% of their performance after repair.

18650 lithium battery repair methods

The theoretical lifetime of a 18650 lithium battery is 1000 cycles of charging. Due to the large capacity per unit density, most of the 18650 is used for notebook computer batteries. In addition, due to its excellent stability at work, it is widely used in various electronic fields: commonly used in high-light flashlights, portable power supplies, wireless data transmitters, electric heating clothing, shoes, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments, and so on.

The principle of lithium battery repair method 1: The metal surface of a lithium battery that has been used for a long time can have a certain degree of oxidation, resulting in poor contact between the phone battery and the phone. The lithium battery has a shorter usage time, and using a rubber eraser or other cleaning tools can remove the rust on the surface, making the contact between the battery and the phone better.

The principle of lithium battery repair method 2: Low temperature can cause changes in the electrolyte inside the 18650 lithium battery, promoting chemical reactions in the newly frozen battery. The use of lithium batteries is actually a process of charging and discharging. During this period, the negative and positive charges in the battery collide with each other. The reason why batteries are becoming increasingly unusable is that at normal room temperature, the kinetic energy inside the 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 electrolyte on the surface of the battery, as well as their interface, will significantly change, resulting in temporary inactivity within the battery and reduced leakage current. Therefore, after recharging, the battery life of the phone will increase.

The principle of lithium battery repair method 3: Deep discharge of mobile phones is to achieve deeper recharging by depleting internal electrical energy, which requires some unconventional methods. Find a way to connect the phone to a 1.5V small light bulb, and the internal power of the 18650 lithium battery will be transferred to the small light bulb until all the light is discharged.

1. After using up all of your 18650 lithium batteries, take them down and use temperature treatment. When the temperature is unstable, the battery will greatly shorten its usage time, because the battery has no electricity and a significant portion of lithium ions already have memory electricity. This method can release some of the memory electricity. When winter comes, put them outside for a while, and then go inside.

2. Another method is to remove the battery and leave it for about a week to slowly consume the electricity. You need to use a machine to completely consume the electricity first. Then fully charge it again. It is estimated that your current charging time must be very short. After fully charging, disconnect it and charge it again. Repeat for several times, which is effective.

Repair methods for lithium batteries in electric vehicles

1. If the abnormal operation of the lithium battery pack in an electric vehicle is caused by damage to the lithium battery protection plate, a simple solution to this problem can be made 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, it is necessary to use a lithium battery repair instrument to eliminate vulcanization;

3. If the failure of the electric vehicle lithium battery pack to work properly is due to a decrease in the serial voltage difference between the lithium battery packs, a decrease in the discharge function of the entire set of lithium batteries or a single series of lithium batteries, and voltage inconsistencies that cause malfunctions such as decreased functionality and performance degradation of the electric vehicle lithium batteries, common users or maintenance service points are dealing with battery replacement, which is relatively costly. If the use of 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 whole battery discharge, single string discharge, and automatic differential pressure repair. It can quickly repair lithium batteries and restore them to their state.

Repair Technology of Lithium Battery for Electric Vehicles

From the perspective of the structure of lithium batteries for electric vehicles, lithium batteries for electric vehicles are mainly composed of lithium batteries, protective panels, and related accessories. Common lithium battery failures include lack of output, inability to charge, insufficient charging, and low battery life. However, these problems are mainly caused by the damage of the lithium battery protection board itself and the damage and contraction of the lithium battery core. Technically, these common failures are completely repairable.

1. Many electric vehicle lithium batteries seem to be unusable, but they actually don't exist. First, you need to use a lithium battery balance repair instrument to detect the battery voltage, discharge, and pressure difference, and identify which part or battery is damaged, causing the entire battery to malfunction.

2. After detecting the root cause of the fault problem, a targeted balance repair instrument is used for technical treatment. Generally, for lithium batteries, the problem is mostly caused by damage to the lithium battery protection board or the lithium battery cell. If the protection board is damaged, it is only necessary to replace the protection board. If the cell function is damaged, it is necessary to use the Shineng and lithium battery balance repair instrument to repair the lithium battery differential pressure, In order to achieve each string of voltage of the battery pack can be charged to saturation, while discharging can also use up the stored electricity.

3. The common balanced charging method on the market is to directly charge the voltage difference of each string of battery packs to 4.2v, which belongs to high-voltage repair. This repair principle is that after a discharge cycle, the voltage difference of battery packs will still exist, and it needs to be repaired again after each discharge. The voltage balance instrument is a low-voltage repair device that allows each string of voltage to reach the low value protected by the protection board after a complete set of discharges and a single string of discharges, and then uses the higher string of voltage in the entire set of batteries as a reference value for low-voltage balance repair. This is a low-voltage repair device, so a single repair can be maintained for a long time, addressing the symptoms and root causes.

The above is the lithium battery repair method, and the lithium battery repair technology for electric vehicles. As long as you master the complete set of lithium battery technology and a complete set of lithium battery detection and repair equipment, it is easy to repair the lithium battery. The repair of lithium batteries requires first identifying issues such as voltage, current, protective plate, connecting wire, welding points, whether there is water ingress, and the length of use. The more difficult to repair is the differential pressure drop.