Advantages and disadvantages of polymer lithium-ion batteries

Advantages of polymer lithium ion batteries 1. Good safety performance. Polymer lithium-ion batteries are structured with aluminum-plastic soft packaging, which is different from the metal shell of liquid batteries. Once a safety hazard occurs, the lithium-ion battery is simply blasted, while the polymer battery will only blow up, at most it will be burned. 2. Small thickness can be made thinner, ultra-thin, thickness can be less than 1mm, can be assembled into credit cards. There is a technical bottleneck for ordinary liquid lithium-ion battery thickness to be 3.6mm or less, and 18650 battery has a standardized volume. 3. Light weight and large capacity. The polymer electrolyte battery does not need a metal shell as a protective outer packaging, so when the capacity is the same, it is 40% lighter than a steel shell lithium battery and 20% lighter than an aluminum shell battery. When the volume is generally large, the capacity of the polymer battery is larger, about 30% higher. 4. The shape can be customized. The polymer battery can add or reduce the thickness of the battery cell according to practical needs. For example, a new notebook of a famous brand uses a trapezoidal polymer battery to make full use of the internal space. The shortcomings of polymer lithium-ion batteries (1) The important thing is that the cost is higher, because it can be planned according to customer needs, and the research and development costs here have to be included. In addition, the shape and variety are varied, which leads to the correct and wrong standard parts of various tooling and fixtures during the production process, which also increases the cost accordingly. (2) The polymer battery itself has poor versatility, which is also brought about by sensitive planning. It is often necessary to plan one for customers from scratch for the difference of 1mm. (3) If it is broken, it will be completely discarded, and the circuit control must be protected. Overcharge or overdischarge will damage the reversibility of the battery's internal chemical substances, which will seriously affect the battery life. (4) The lifespan is shorter than 18650 because of the use of different plans and materials, some have liquid inside, some are dry or colloidal, and the performance is not as good as 18650 cylindrical batteries when discharged at high current. 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: Introduction to charging techniques and methods for lithium iron phosphate batteries