Some methods to detect the quality of lithium batteries

Due to its high energy density and long cycle life, lithium batteries are becoming more and more widely used in our daily life. However, since lithium batteries are consumable products, they are often charged and discharged, no matter how good lithium batteries are. Its service life is also a certain period of time.

When the lithium battery needs to be replaced, how do we tell us how good the quality of the products we want to buy? Xiaobian here introduces some methods to check the quality of lithium batteries, I hope to help everyone.

Lithium battery quality inspection method

1 test internal resistance and maximum discharge current

One of the fastest ways to check the quality of a lithium battery is to test the internal resistance and maximum discharge current of a lithium battery. A good quality lithium battery, the internal resistance is very small, and the maximum discharge current is large. Using a multimeter to directly short the two lithium batteries Electrodes, the current should generally be within a certain value, or even higher, while maintaining a relatively stable period of time is generally a good quality lithium battery.

2 observe the appearance

The appearance and cleanliness of the lithium battery can still have some feedback on its quality work. The well-made lithium battery, the overall appearance must be regular, the same is true for the material work. Because the lithium battery wants to protect itself The safety quality, only the use of sophisticated equipment for manufacturing can not affect the quality of the material components and shapes during the production process.

3 check the hardness of the lithium battery

The lithium battery can be lightly pinched or pinched by hand or with a tool. If the hardness of the lithium battery is moderate, no soft squeeze feels that the battery of the lithium battery is a relatively high quality battery.

4 perceived weight

Remove the outer packaging of the lithium battery to see if the weight of the battery is relatively heavy. If the weight has a certain thickness, it is a high quality battery.

5 continuous discharge observation

In the process of charging the lithium battery, it will last for about ten minutes. If the two poles of the lithium battery are not hot, it proves that the protection system of the lithium battery is perfect. Under normal circumstances, the quality of the lithium battery with high quality battery protection system is not good. It will be too bad.

A poor quality lithium battery usually has a non-durable condition. The specific performance is that the power consumption is very fast, and the time required for charging is shortened. When charging, it often fails to charge the normal charging time. It will show that it is already full, but in the actual use, doing the same thing, the power is exhausted faster than before.

The poor quality lithium battery generally occurs in a situation that affects the user experience but usually does not threaten the user's life safety. Although it is usually not dangerous to the user's life and property, it is still extremely harmful. Cases, such as the quality of the lithium battery protection board, may cause the lithium battery to ignite when charging. If it is in the middle of the night, the user is often in a sleep and has no time to react, which is more harmful to the user. .

Therefore, when purchasing a lithium battery, users still need to carefully check and identify it. When using it, it is found that there is a problem with the lithium battery, and it should be carefully checked. If it is confirmed that it will be dangerous to continue using it, it must be replaced. After all, security is the most important.