How to judge and distinguish the quality of 18650 lithium batteries.

How to judge and distinguish the quality of 18650 lithium batteries.

1. Check if the battery packaging is consistent, and then feel that high-temperature lithium battery packs with poor consistency in battery components will not have maintenance boards. According to the law of energy conservation, the storage capacity inside high-temperature lithium battery packs will become very low. Bad high-temperature lithium battery packs will result in a low storage capacity cell that cannot fully release or receive electrical energy, which will shorten the battery's lifespan over time. Removing the outer packaging may feel the weight of the high-temperature lithium battery. If it feels thick, then this high-temperature lithium battery is relatively good; 

2. Check the appearance of the battery. High temperature lithium batteries with a more delicate appearance are more exquisite in workmanship. However, if there are any unsatisfactory aspects of the appearance of the invention, it should be promptly reported; 

3. Pinch the area next to the battery lightly. If the hardness is moderate, it indicates that the quality of the high-temperature lithium battery is also good; 

4. Discharge test to see if satisfied. The request may be continuously discharged for about 10 minutes for the experiment. If both do not generate heat, the quality is considered qualified; There are many methods to test high-temperature lithium batteries, and we may also use a meter to measure the internal resistance and discharge current of high-temperature lithium batteries, and then evaluate them according to standards. If there is a significant issue of overheating during the charging and discharging process, the quality of the battery will be poor. Individually speaking, high-temperature lithium battery packs should be able to meet the insurance requirements of 3C charging and 30C discharging. Individually speaking, if the quality of high-temperature lithium batteries is good, they can be used for a longer period of time. However, the longer the lifespan, the more time high-temperature lithium batteries can be used after certain losses and without maintenance. Therefore, we should also pay attention to maintenance when using high-temperature lithium batteries, which can prolong the utilization time of high-temperature lithium batteries.