How to detect the lithium battery quality?

　　Author ：Iflowpower – Portable Power Station Supplier

Battery plays a vital role in our lives, which is used as storage power, power supply, especially lithium batteries, very wide range, often in some small portable appliances, such as mobile phones. Battery belongs to consumption materials, often charge discharge, whether there is a good battery, and the price of lithium battery is higher than other batteries, so try to choose a good quality lithium battery when purchasing, long-term time, So everyone will learn how to test the quality of the quality of lithium battery. Lithium battery quality is good and bad test method: 1.

The fastest test method is to test internal resistance and maximum discharge current, quality lithium battery, very small internal resistance, large discharge current. With a 20A range of multimeter, the two electrodes of the lithium battery are directly short, and the current should generally be around 10A, even higher, and can remain a period of time, relatively stable is a good battery. 2, look at the appearance.

The extent of the appearance, such as a lithium battery, which is generally 2000mAh, is relatively large. Finishing work is relatively full of packaging. 3, see hardness.

You can pinch or moderately pinch the middle part of the lithium battery, the hardness is moderate, and there is no soft extrusion in the lithium battery belongs to a relatively high quality battery. 4, see weight. In addition to the outer packaging aware of whether the battery weight is more sinking, if the thickness belongs to the quality battery.

5. In the process of charging the lithium battery, the battery is not hot for about 10 minutes. If the battery protective board system is perfect, the quality of the lithium battery with high quality protective plate is better than the ordinary lithium battery.

The main causes of errors in the test are: 1. Discharge time (actual 266 minutes) slightly less than 5 hours of national standards, that is, the discharge current is too large, considering the internal resistance factors of the battery, will make the test result slightly small. 2.

The constant current source accuracy is not enough, lower than national standard requirements (within 1% of current changes), mainly transistor temperature changes. 3. The accuracy of the current table is lower than the national standard requirements (should be ≤0.

5 accuracy) 4. The battery charging method is slightly different from the national standard requirements (the national standard requires the charging time to be more than 8 hours), but the maximum capacity condition of the battery is met. Based on this, this personal detects that the battery capacity is about 1700mAh, far below the nominal capacity 3800mAh.

The quality of the quality of the lithium battery is about two years or three years. The performance of lithium battery is not very fast, and the charging time is also reduced. In order to ensure the time for lithium batteries, pay attention to the protection of lithium batteries, such as new batteries, usually take a first three times charge to be 12 hours, to activate the battery, and pay attention to the charging, many people will have Blind area, that is, the mobile phone is completely out of power and then charge, this idea is wrong, in order to protect the lithium battery, try to charge the remaining amount of electricity.

.