lithium ion battery cells 18650

　　Misunderstandings in using lithium ion battery cells 18650 and what are the symptoms of insufficient battery?

　　A misunderstanding about the use of lithium ion battery cells 18650 is not turning off the lights in time. Try to avoid using the car battery to connect high-power electrical equipment, which will cause excessive discharge. Next, I will introduce to you some misunderstandings about the use of lithium ion battery cells 18650. What are the symptoms of insufficient battery?

　　1. Misunderstandings about the use of lithium ion battery cells 18650

　　1. Using electrical equipment in the car for a long time after turning off the engine will cause excessive discharge of the battery. Failure to turn off the lights in time will cause the battery to be exhausted. At this time, the performance of the battery may have been greatly reduced.

　　2. After shutting down the engine, you should try to avoid using electrical equipment, such as stereos, DVDs, radios, lights, air conditioners, etc., for no longer than 30 minutes. If you must use electrical equipment, it is best to start the engine with the generator. electrical energy.

　　3. When the engine is started, the battery will discharge with high current, but long-term high current discharge will greatly damage the battery. Each start time should not exceed 5 seconds. If it is started twice in a row, there should be an interval of 10 to 15 seconds.

　　4. Since the raw materials for manufacturing batteries cannot be 100% pure, there will always be impurities mixed in the middle, so the battery inevitably discharges automatically, and the anti-theft alarm also needs electricity after turning off the engine.

　　5. Try to avoid using the car battery with external high-power electrical equipment. Such equipment consumes a lot of electricity and may cause the battery to over-discharge. If it must be used, it is best to start the engine while using it and let the generator Powered by the battery.

　　6. Do not overcharge. If the voltage regulator of the car alternator is not set correctly, the output voltage of the alternator will be high. When the charging voltage exceeds the maximum limit voltage of the battery, overcharging may occur. At this time, If the fault is not checked and eliminated in time, the battery will overheat, causing abnormal consumption of electrolyte. Overcharging will accelerate the decomposition of active materials on the battery plates, causing the battery to fail.

　　2. Symptoms of insufficient car battery power

　　1. Multimeter

　　Using a multimeter can only check the voltage of the battery and cannot be used as a test of capacity. When some damaged batteries are tested for voltage, the voltage will be 12V. The cause of damage is not damage to a single cell of the battery, but blockage of the plate pores. The resulting insufficient capacity will not cause the battery voltage to drop.

　　2. Experience

　　Experienced repairmen can judge whether the battery can continue to be used based on the engine speed at startup. However, because this judgment is too subjective, the basis for the judgment cannot be informed to the car owner, and whether the judgment is correct is directly related to the skill of the repairman, so it cannot be promoted. use.

　　3. Observation window

　　There is an observation window on the maintenance-free battery, and you can judge the quality of the battery by observing the color inside. However, this observation is only a rough judgment based on the electrolyte density and liquid level height in the battery. It can only determine whether the battery is damaged, but cannot determine whether the cold start capacity of the battery is sufficient or whether it can continue to be used. Here we need to distinguish the difference between "not broken" and "usable". A battery that shows that the observation window is not broken may not necessarily be usable.

　　4. Time

　　Whether the battery can continue to be used is judged by the usage time. This method is too subjective. Because different car owners have different driving habits, cars used for the same time also have different conditions, and the service life of the battery will also be very different, so this judgment method is not advisable.

　　5. Tester

　　How to correctly judge whether the battery can be used normally? The author uses a battery tester to better detect the starting capacity of the battery, so as to determine whether the battery can be used normally.

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