Reasons for the widespread use of 18650 lithium batteries

Meaning of 18650 lithium battery: 18650 is the originator of lithium battery, which is a standard lithium battery developed by Sony in order to save costs. Among them, 18 is a diameter of 18mm, 65 is a length of 65mm, and 0 is a cylindrical battery. Ordinary 18650 batteries are divided into lithium batteries and lithium iron phosphate batteries. The voltage of the lithium battery is 3.6v and 4.2v, the voltage of the lithium iron phosphate battery is 3.2v, the capacity is usually 1200mAh-3000mAh, and the general capacity is 2200mAh-3600mAh. Lithium batteries are widely used because of their light weight, large capacity, and no memory. Many digital devices are powered by lithium batteries, although they are relatively expensive. The energy density of lithium batteries is very high, and its capacity is 1.5 to 2 times that of nickel-hydrogen batteries of the same weight, and the self-discharge rate is very low. In addition, lithium batteries have almost no memory effect and do not contain toxic substances, which is also an important reason for the widespread use of lithium batteries. What is an 18650 battery? Let's start with the number 18650, which is actually the size. 18 means that the diameter of the battery is 18mm, 65 means that the length is 65mm, and the last 0 means that the battery is cylindrical. 18650 batteries generally have three types: lithium batteries, lithium iron phosphate batteries, and nickel-hydrogen batteries. The 18650 standard is a standard-shaped lithium battery model developed by Sony in the early stage to save costs. Since then, it has been used and has become the standard. Since lithium batteries have better performance than nickel-cadmium batteries or nickel-hydrogen batteries in many aspects, lithium batteries are used in many shapes of batteries. What are the characteristics of this battery? (1) Large capacity: the battery capacity of lithium batteries is at least 1200mah or even 3600mah, while the battery capacity of general batteries is only about 500; high energy storage efficiency and good stability: 70's The environment can still maintain full performance output, and there is generally a protection circuit to prevent battery burnout; almost no memory effect: the remaining power will not be completely discharged before charging, it can be discharged at any time, easy to use; high charge and discharge cycle life: lithium The battery is cycled several thousands of times, and the high temperature resistance is very good; environmentally friendly, non-toxic substances: non-toxic, harmless, non-polluting, and passed the RoHS quality certification. Lithium batteries usually do not use one root, but multiple roots, we often call them batteries together, and battery life usually appears outside, waiting for our laptop batteries, power banks, electronic digital products, printers, wireless devices, portable, walkie-talkie communications, Lithium batteries for POS machines, etc. At present, many batteries have a capacity of up to 2200mAh. The following is the specification table of Sanyo brand lithium batteries. Generally good batteries have four important protection functions: (1) Overcharge protection: When the lithium battery is overcharged, the internal temperature of the battery will continue to rise, and the battery voltage will be added. Detection system, when the battery overcharge pressure reaches a certain value or time period, the overcharge function is activated, and the charge is automatically stopped to protect the battery; (2) Overdischarge protection: Overdischarge means that the battery is already in an overload output state, generally discharged Protection, the battery will be in a static state at this time; Over-current protection: This over-current protection value can be adjusted, some things are several amperes, and can be set according to the actual situation (4) Short-circuit protection; when the battery is short-circuited, the over-current will protect the battery Uses that do not burn out. In addition to these four protection functions, some also have functions such as temperature and balance. The battery generally has a built-in PCM protection system with multiple protection functions. 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: How many cycles can the lithium battery be used normally?