Analysis and repair of reasons why 18650 lithium batteries cannot be charged

The application range of 18650 lithium batteries is relatively wide, but in daily use, it is a common problem that 18650 lithium batteries cannot be charged, and it is also a headache that often troubles users. So how can we solve the problem of 18650 lithium batteries not being charged, and what is the reason why 18650 lithium batteries cannot be charged? Let's explore the reasons and methods together below.
1、 There are several reasons why 18650 lithium batteries cannot be charged:
1. Internal charging circuit malfunction, unable to charge normally.
2. There is an internal malfunction in the 18650 lithium battery.
3. The battery electrode contacts are dirty and the contact resistance is too high, causing a significant voltage drop. When charging, it is considered that the host is full and charging is stopped;
2、 Solution for 18650 battery not charging:
1. The charger interface is aging or the charger itself is damaged. Replace with a new charger for testing.
2. There is an issue with the quality of the charging circuit. Replace with a new pipeline.
3. The metal in the charging hole is oxidized, resulting in poor contact, which is a hardware malfunction and requires detailed maintenance after sales. If the battery itself is depleted or damaged, replace it directly.
3、 18650 lithium battery repair principle:
Repair principle 1: Long term use of lithium batteries can cause a certain degree of oxidation on the metal surface, leading to poor contact between the phone battery and the phone. Lithium batteries have a short usage time, and using rubber camphor or other cleaning tools can remove rust on the surface, allowing the battery to continue to come into contact with the phone. Take better action.
Repair principle 2: Deep discharge of mobile phones is achieved by depleting internal electrical energy to achieve deeper recharging, which requires some non-traditional methods. Find a way to connect your phone to a 1.5V light bulb. The electricity inside the lithium battery will be transmitted to the small light bulb until all the lights are on. A mobile phone needs to slowly drain its power through a lower voltage. Usually, if the connection voltage of the phone is below 3.6 volts, the phone will automatically shut down. Charging allows the battery to be used for a longer period of time.
Repair principle 3: Low temperature can change the electrolyte of lithium batteries and promote the chemical reaction of newly frozen batteries. 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 impractical is that at normal room temperature, the internal energy of electrons is relatively high, so the battery is in an active state and leakage is relatively frequent. When the lithium battery is placed in a low-temperature environment, the microstructure of the lithium film and electrolyte on the surface of the lithium battery, as well as the interface between the lithium battery and the lithium battery, significantly change, making the internal of the battery inactive and reducing leakage current. So after charging, the standby time of the phone will increase.

The cycle life of lithium batteries is about 600 times. If charged multiple times, the thermal motion of molecules will gradually disrupt the internal arrangement and structure of molecules, and the efficiency of charge storage will gradually decrease. The process of freezing can easily damage the original internal structure of the battery, and the charging capacity may improve in a short period of time, but long-term use may not be effective. Once the microstructure of a lithium battery is destroyed, it is impossible to fully recover. Long term use of this method will accelerate the loss of mobile phone batteries.
4、 Repair methods for 18650 lithium batteries:
1. After the battery is fully used, remove it and use the temperature for processing. When the temperature is unstable, the battery can greatly shorten its usage time because there is no battery, and a large part of the lithium-ion has memory. Therefore, a portion of the memory can be discharged and stored outside for a period of time in winter, and then returned to the house.
2. Another method is to remove the battery and set it aside for about a week, which will slow down the power consumption. It needs to be completely consumed by the machine first. Then make full use of it. It is estimated that your current charging time will be very short. When it is full, it will be cut off and repeated several times, which is definitely effective.

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