How to quickly distinguish the quality of new and old lithium iron phosphate battery cells?

The AC power file of a digital multimeter that is higher than the rated current of the rechargeable battery is used for testing. Use DC10V and DC2V files to detect the characteristics of the 9V battery. After selecting the gear according to the rated current of the lithium battery, connect the positive and negative stages of the rechargeable battery with a DC ammeter respectively. If the experimental working voltage is greater than or equal to the rated current of the rechargeable battery tolerance. The battery is intact. Under the condition that the experimental working voltage is less than 10% of the rated current, the rechargeable battery can be used to charge and discharge small household appliances with a deep level. Such as: quartz clocks, controllers and other electronic products. When the experimental working voltage is less than 20% of the rated current, the rechargeable battery has no practical value. It should be reminded that the working voltage of rechargeable batteries is generally 15%-25% lower than that of similar rechargeable batteries. For example, the working voltage of rechargeable batteries is that there are only rechargeable batteries. Therefore, you must carefully determine the standard of the lithium-ion battery pack. Rated current. Ways to test the quality of lithium batteries: A faster inspection method is to test the internal resistance and larger charge and discharge currents. High-quality lithium batteries have very small internal resistance and large charge and discharge currents. Use digital multimeter 20A, immediately connect 2 levels of lithium battery, the current should generally be around 10A, or even higher, and can be maintained for a period of time, relatively stable is a good rechargeable battery. Look at the appearance, the fullness of the appearance design, such as the general lithium battery of 2000 mA, the volume is too large. The processing technique is more detailed or the packaging looks more plump. Looking at the strength, you can gently pinch or properly pinch the middle part of the lithium battery. The strength is moderate and there is no soft extrusion feeling, which proves that the lithium ion battery cell belongs to a good lithium battery cell. Attach great importance to the total number, except that the packaging box recognizes whether the net weight of the rechargeable battery is heavy, and if it is too heavy, it belongs to the high-quality lithium battery. During the mid-term charging of the lithium-ion battery pack, continue to charge and discharge for about ten minutes. If the two aspects of the rechargeable battery are not hot, it is confirmed that the battery protection board system software is sound. Generally, the quality of the lithium battery with a high-quality lithium-ion battery protection board is good For general lithium batteries. The above is to quickly find out whether the lithium battery is good or bad. Lithium batteries have a certain service life, and the price of lithium ion batteries is higher than other rechargeable batteries. Therefore, when buying, choose lithium batteries that are cost-effective and can last for a long time. Can grow. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Introduction to the classification of lithium-ion battery electrolyte