What are the general advantages and disadvantages of polymer lithium batteries

1. The working voltage of the single battery is as high as 3.6v~3.8v, which is much higher than the 1.2V voltage of nickel-metal hydride and nickel-cadmium batteries. 2. Large capacity density, its capacity density is 1.5~2.5 times of Ni-MH battery or Ni-Cd battery, or higher. 3. The self-discharge is small, and its capacity loss is also small after being left for a long time. 4. Long life, its cycle life can reach more than 500 times in normal use. 5. There is no memory effect, it is not necessary to empty the remaining power before charging, which is convenient to use. 6. Good safety performance. The polymer lithium battery adopts aluminum-plastic soft packaging in structure, which is different from the metal shell of the liquid battery. Once a safety hazard occurs, the liquid battery is easy to explode, and the polymer battery will only blow up at best. 7. The thickness is small, and it can be made thinner and ultra-thin, and the battery can be assembled into a credit card. Generally, liquid lithium batteries use the method of customizing the shell first, and then plugging the positive and negative materials. The thickness is below 3.6mm and there is a technical bottleneck. Polymer batteries do not have this problem. The thickness can be below 1mm, which is in line with the current demand for mobile phones. . 8. The light-weight battery using polymer electrolyte does not require a metal shell as a protective outer packaging. The weight of a polymer battery is 40% lighter than a steel shell lithium battery of the same capacity and 20% lighter than an aluminum shell battery. 9. Large-capacity polymer batteries have a capacity of 10-15% higher than steel shell batteries of the same size and 5-10% higher than aluminum shell batteries. They have become the first choice for color screen mobile phones and MMS mobile phones. Most mobile phones also use polymer batteries. 10. Small internal resistance. The internal resistance of polymer batteries is smaller than that of ordinary liquid batteries. At present, the internal resistance of domestic polymer batteries can even be less than 35m, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone. In time, it can fully meet the international standards. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control models, and it has become the most promising product to replace nickel-metal hydride batteries. 11. The shape can be customized. Manufacturers are not limited to the standard shape, and can be economically made into a suitable size. Polymer batteries can add or reduce the thickness of battery cells according to customer needs, and develop new battery cell models. They are cheap and have a short mold-opening cycle. Some can even be tailored to the shape of the mobile phone to make full use of the battery shell space and improve battery capacity. 12. Good discharge characteristics. Polymer batteries use colloidal electrolytes. Compared with liquid electrolytes, colloidal electrolytes have stable discharge characteristics and a higher discharge platform. 13. The design of the protection board is simple. Due to the use of polymer materials, the battery core does not fire or explode, and the battery itself has sufficient safety. Therefore, the protection circuit design of the polymer battery can be considered to omit the PTC and fuse, thereby saving battery costs. Disadvantages: 1. The battery cost is high, and the electrolyte system is difficult to purify. 2. To protect the circuit control, overcharge or overdischarge will destroy the reversibility of the battery's internal chemical substances, which will seriously affect the battery's life. 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: Detailed explanation of the advantages of the wet and dry processing technology of lithium battery diaphragm