Twelve advantages of polymer lithium batteries

There are thousands of links between the battery life, charging and discharging and battery functions of electric vehicles. The most commonly used batteries on the market are lithium iron phosphate batteries, lithium polymer batteries, and ternary lithium batteries. The three batteries have their own characteristics. Lithium polymer battery Lithium polymer battery generally refers to lithium polymer battery. The positive and negative materials used in polymer lithium batteries are the same as the liquid lithium ion. The negative electrode materials are divided into lithium cobalt acid, lithium manganese acid, ternary materials and lithium iron phosphate materials. The working principles of the negative electrode graphite and the battery are basically the same. of. The working principle of a lithium polymer battery is the same as that of liquid lithium, but the first difference is that the electrolyte is different from that of liquid lithium. The basic structure of the battery consists of three parts: positive electrode, negative electrode and electrolyte. The so-called polymer lithium battery refers to a battery system with at least one or more of the three important structures using polymer materials as important materials. In the currently developed polymer lithium battery system, polymer materials are mainly used for positive electrodes and electrolytes. Advantages of polymer lithium batteries 1. The operating voltage of a single battery is as high as 3.6v~3.8v, which is much higher than the 1.2v operating voltage of nickel-hydrogen batteries and nickel-cadmium batteries. 2. High capacity density, its capacity density is 1.5~2.5 times or higher than that of nickel-hydrogen battery or nickel-cadmium battery. 3. The self-discharge is small, and the capacity loss is small after a long time. 4. Long service life, its cycle life can reach more than 500 times in normal use. 5. No recall effect, no need to empty the remaining power before charging, easy to use. 6. The safety performance is good. The polymer lithium battery chooses aluminum-plastic soft packaging in the structure, which is different from the metal shell of the liquid battery. Once the safety hazard breaks out, the liquid battery is easy to explode, while the polymer battery has only a gas drum at most. 7. The thickness is small, and it can be made thinner. The ultra-thin battery can be assembled into a credit card. Liquid lithium batteries generally adopt the method of customizing the shell first, and then sealing the positive and negative materials. The thickness below 3.6mm has a technical bottleneck, and polymer batteries do not have this problem. The thickness can be less than 1mm, which is in line with the current demand for mobile phones. 8. Lightweight polymer electrolyte batteries do not need metal casings to protect them. Polymer batteries are 40% lighter than steel lithium batteries of the same capacity and 20% lighter than aluminum batteries. 9. Large capacity, polymer battery is 10~15% higher than steel shell battery of the same size and 5~10% higher than aluminum shell battery. It is the first choice for color screen mobile phones and MMS mobile phones. Most of the new color screen and MMS mobile phones on the market now also use polymer batteries. Low internal resistance The internal resistance of polymer batteries is less than that of liquid batteries. Now the internal resistance of domestic polymer batteries can even be less than 35m, which greatly reduces battery power consumption and prolongs the standby time of mobile phones, which can reach the world level. Lithium polymer, which supports large discharge current, is the most promising material to replace Ni-MH batteries. 11. Self-meaning shapes. Manufacturers don't have to limit their standard shapes; they can adapt economically. Polymer lithium batteries can add or reduce battery thickness according to customer needs, develop new battery types, low prices, short mold cycles, and some can even be customized according to the shape of the mobile phone, making full use of the battery shell space and increasing battery capacity. 12. The planning of the protection committee is very simple. Due to the use of polymer materials, the battery will not catch fire or explode, and the battery itself has sufficient safety. Therefore, the protection circuit planning of polymer batteries can consider eliminating PTC and fuses, thereby saving the cost of batteries. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: The difference between lithium iron phosphate battery and ternary lithium battery