The difference between 18650 lithium batteries and lithium polymer battery have?

Source: 2020 - 04 - 20 hits lie: 18650 what is the difference between lithium battery and lithium polymer battery? Why the domestic 18650 lithium batteries and lithium polymer batteries generally is not high? 18650 is only a size, the shape of the battery is a 18 mm diameter, height is 65 mm cylinder. 18650 can be ordinary lithium cobalt oxide batteries, lithium iron phosphate batteries, lithium-ion polymer battery, and early nickel metal hydride and nickel cadmium ( Now almost no) All in all, 18650 is just a form of packaging. Same square does not necessarily equal to the polymer, soft package lithium-ion besides it's not easy to build pressure and explosion, other security performance and steel shell is the same, because there is no steel shell protection easy to break! As long as there is a kind of electrode materials and electrolyte in the polymer can be polymer battery. Compared with the ordinary liquid electrolyte of lithium ion battery, the polymer in shape is free, do not need high strength of container, make full use of space, can be in internal stack in order to increase the voltage. It is worth noting that the polymer battery and ordinary lithium ion battery is likely to be on fire, but all the possibility of polymer battery fire is much smaller. But the real is not completely beyond the common lithium-ion polymer battery, the first is the internal resistance, and often the same internal resistance is greater than the capacity of ordinary lithium ion polymer, can use soft package 3. 7 V lithium polymer batteries, lithium batteries, the other one is the price, average price of lithium ion polymer above average, but in thin costs less than ordinary lithium-ion polymer battery, energy relative to the general weight of the polymer has advantages, not relative to the volume. From inside the battery materials, polymer lithium battery refers to the polymer as the electrolytes of lithium ion batteries. Concrete can be divided into 'half polymers' and' total polymer. 'half a polymer is a polymer layer ( Usually PVDF) Coating on the film, make the battery more closely, the battery is more hard, is still a liquid electrolyte electrolyte. Polymer 'and' refers to the use of polymer gel network is formed within the cell, and then injected into the electrolyte electrolyte to form, although 'overall' polymer battery will still use liquid electrolyte, but a lot of less dosage, the safety of the lithium ion battery performance is greatly improved, as far as I know different lithium polymer battery can be made into different batteries, the most basic is 3. 7 V lithium polymer battery, battery manufacturers in China there are a lot of this kind of flexible packaging, polymer battery production if all polymers, perhaps now only SONY in the production of 'all' polymer lithium ion batteries. This is a kind of polymer lithium battery, on the other hand, polymer battery is to use the blister packaging film as packing lithium ion battery, battery is often referred to as soft bag. Packaging is composed of three layers: polypropylene, aluminum and nylon. Because is polypropylene and nylon polymer, is known as the polymer battery. According to the difference between the 18650 lithium batteries and lithium polymer battery, should be refers to the battery, the latter the so-called polymer lithium ion battery of packaging materials, and with the matching 18650 battery made with steel shell packaging. And many domestic manufacturers promote their batteries, polymer battery production, is the same meaning, don't be fooled by their oh ~.