How to test the quality of lithium ion batteries

　　Author ：Iflowpower – Portable Power Station Supplier

The battery plays a critical purpose in our lives, which is used as storage power, power supply, especially lithium-ion batteries, and is often used in some small portable appliances, such as mobile phones. Battery belongs to consumption materials, often charge discharge, whether there is a good battery, and a lithium-ion battery price is higher than other batteries, so try to select a good quality lithium-ion battery when purchasing, long-term One point, then everyone will learn the quality of the lithium-ion battery test quality. Lithium-ion battery quality quality test method: 1.

The fastest test method is to detect internal resistance and maximum discharge current, good quality lithium-ion battery, very small internal resistance, large discharge current. With a 20A range of multimeters, the straight shorts of the two electrodes of the lithium-ion battery, the current should generally be around 10A, even higher, and can be kept for a period of time, relatively stable is a good battery. 2, look at the appearance.

The extent of the appearance, such as a lithium-ion 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 ion battery, the hardness is moderate, and there is no soft extrusion that the lithium battery belongs to a relatively high quality battery. 4, see weight. In addition to the outer packaging, it is more sinking that the battery weight is sinking.

If the thick person belongs to the quality battery. 5. In the process of lithium-ion battery, the battery is continuously discharged for about 10 minutes, if the battery is not hot, then the battery protective board system is perfect, and the quality of the lithium ion battery with high quality protective plate is better than the general lithium ion battery.

The probe caused by an error of the error is: 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 detection result slightly small. 2.

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

5 level accuracy) 4. The battery charging method is slightly different from the national standard requirements (the national standard requires charging time cannot be greater than 8 hours), but the maximum capacity condition of the battery is met. Based on this, this personal test of the battery capacity is about 1700mAh, far below the nominal capacity 3800mAh.

The service life of a good quality lithium-ion battery is about two years or three years. The performance of lithium-ion battery is not very fast, and the charging time is also reduced. In order to ensure the time for lithium-ion batteries, pay attention to the protection of lithium-ion batteries, such as new batteries, usually 12 hours before the first three times, to activate the battery, and pay attention to it, many people There will be a blind spot, that is, the mobile phone is completely out of power, then it is wrong.

This idea is wrong. In order to protect the lithium-ion battery, try the remaining half of the amount of electricity to charge. .