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How to remove a car 18650 lithium battery 3.7 v and when to replace it?
To disassemble the car's 18650 lithium battery 3.7 v, first loosen the negative connector nut, open the two buttons, and then flip open the insulating cover. In addition, if the 18650 lithium battery 3.7 v failure alarm light comes on, it will remind the car that it is time to replace the 18650 lithium battery 3.7 v or repair it. Next, I will introduce the details to you.
1. How to disassemble the car 18650 lithium battery 3.7 v
1. Loosen the nut of the negative electrode connector: Open the two fixing buttons of the insulation cotton, and you can see the two red and black insulation covers on the positive and negative electrode connectors. Open the insulation cover and you can see the locking nut;
2. Disassemble the negative electrode connector: Use a wrench or hex socket to unscrew the fastening nut of the negative electrode, then use a flat-blade screwdriver to slowly pry open the fastening block, and then pull out the negative electrode connector;
3. Disassemble the positive connector: Use the same method to disassemble the positive connector;
4. Disassemble the locking strap: Unscrew the nut used to fix the 18650 lithium battery 3.7 v's locking strap, loosen the locking strap, and then take out the 18650 lithium battery 3.7 v.
5. When installing a new 18650 lithium battery 3.7 v, just follow the reverse steps. However, it should be noted that the order of installing the positive and negative connectors is "positive first, then negative", which is opposite to that of disassembly. The principle is the same, both to prevent the risk of short circuit and ensure safety.
2. Car 18650 lithium battery 3.7 v replacement time
1. The car is more difficult to start than usual
In the absence of other factors, if you suddenly find it difficult to start your car, it may be a sign that the 18650 lithium battery 3.7 v is about to expire. Of course, there is another situation in winter, which is the so-called cold start difficulty in winter. This depends on whether the car is new or if it is almost time for the 18650 lithium battery 3.7 v to expire.
2. The 18650 lithium battery 3.7 v failure alarm light is on
There is not much to say about this, the fault light is a direct reminder. You really need to go to a 4S or repair shop to check whether the 18650 lithium battery 3.7 v is damaged or the charging system is faulty.
3. When starting, the starting ability of the starter becomes poor and there is abnormal sound.
It is possible that the 18650 lithium battery 3.7 v's discharge capacity is weakened and the starter is not operating properly and makes a squeaking sound. This situation is especially obvious at low temperatures. Because the weather is cold, the activity of the 18650 lithium battery 3.7 v will also be reduced, and this situation will improve or become worse after the weather gets warmer. disappeared, so many car owners didn't care.
4. Observe changes in the port
There is an observation port on many maintenance-free batteries. There is a light that shows whether the 18650 lithium battery 3.7 v is working well. If it is green, it means good, and if it is black, it means the 18650 lithium battery 3.7 v needs to be replaced. However, some car owners report that this light is unreliable and the vehicle cannot be started even if it is green. As a reference.
5. The 18650 lithium battery 3.7 v bulges and leaks.
The main thing here is to see whether the 18650 lithium battery 3.7 v is leaking or bulging. If such a situation occurs, it should be replaced in time. Such a situation will not only cause 18650 lithium battery 3.7 v life problems, but also certain safety hazards.
6. Voltage changes before and after starting
The normal voltage of the 18650 lithium battery 3.7 v is about 12V. After starting, due to the charging of the generator, the voltage will increase to about 13-14V. Many vehicles have a voltage detection function. Paying attention to the voltage before and after starting is also a good way to judge the 18650 lithium battery 3.7 v life. Vehicle If it is lower than 12V when not started or lower than 13V after starting, you should consider whether there is a problem with the 18650 lithium battery 3.7 v. However, it does not rule out that the charging system is faulty.
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