When buying lithium batteries, in order to choose a good quality product, you can refer to the following suggestions:
Choose a big brand
Priority is given to well-known brands, such as Chang’e Lithium Battery, CATL, BYD, Guoxuan Hi-Tech, etc. These brands enjoy a high reputation in the market, and their product quality and after-sales service are relatively more guaranteed.
Be careful not to choose products that are too cheap, as low prices often mean cost compression, which may affect the quality and performance of the battery.
Check whether the product complies with the national standard
Ensure that the lithium battery purchased meets the GB36972-2018 “National Standard for Lithium-ion Batteries for Electric Bicycles” or other relevant national standards. This is an important guarantee of product quality.
If there is no clear national standard, you can refer to industry standards or enterprise standards, but it is important to ensure that the standards have a certain authority and credibility.
Inspect the qualifications of manufacturers
Check the manufacturer’s registered capital, official website, WeChat official account and other information to evaluate its scale and strength. Manufacturers with a registered capital of less than 100 million may belong to workshop-type factories and need to be carefully selected.
Priority is given to manufacturers with perfect R&D and production systems, which can ensure the stability and reliability of products.
Check the appearance and packaging
Observe the appearance and packaging of the lithium battery to see if there is any obvious damage or flaws. Although the appearance cannot directly reflect the performance of the battery, it can be used as the basis for preliminary screening.
Pay attention to the product label and instructions to ensure that the information is complete and accurate.
Detection of cells and live operation
Check that the battery cells are brand new and avoid buying lithium batteries made from second-hand batteries. New cells are usually more secure and stable.
In the process of live working of the lithium battery, continue to discharge for about 10 minutes to observe whether the two poles of the battery are hot. If the two poles of the battery are not hot, it means that the battery protection board system is perfect and the battery quality is good.
Compare weight and internal resistance
The weight of a lithium battery is directly proportional to its capacity. If the battery is on the low side, it may mean that the capacity is insufficient. Therefore, it may be more reliable to choose a heavier weight battery for the same specifications.
Testing the internal resistance and maximum discharge current is also an effective way to judge the performance of lithium batteries. Good quality lithium batteries usually have a small internal resistance and a large maximum discharge current.
Pay attention to the life of the battery and how it is charged
The life of a lithium battery is limited to the number of times it can be fully charged. When purchasing, you need to know the life information of the battery, so that you can reasonably arrange the number of charging and discharging times in use.
Different charging methods (e.g., fast charging, slow charging, trickle charging, constant current charging, etc.) may have an impact on the performance and life of the battery. When purchasing, you need to know the charging method supported by the battery so that you can choose the appropriate charging method.
To sum up, when buying lithium batteries, you need to consider the brand, national standard, manufacturer qualification, appearance, cell, weight, internal resistance, life and charging method and other aspects in order to select a good quality product.