Is it better to use polymer lithium batteries for power banks or lithium batteries?

Lithium polymer batteries are characterized by high energy density, ultra-thinness, and their internal materials are solid or colloidal solids, and will not leak liquid if the battery is damaged. Lithium batteries are characterized by light weight and easy to carry. Mobile power, commonly known as power bank, I think everyone is familiar with it. It is estimated that the majority of valuers will have at least one, some even several. At present, the batteries of mobile power sources on the market are generally divided into two types: lithium polymer batteries and lithium batteries. In fact, the full name of lithium polymer batteries should be called lithium ion polymer batteries, so lithium polymer batteries are actually a kind of lithium batteries. In terms of internal structure, the biggest difference between lithium polymer batteries and lithium batteries is the difference in electrolytes. Lithium polymer batteries use solid or gel polymer electrolytes, while lithium batteries use liquid electrolytes. Is polymer lithium battery better for power bank or lithium battery? Lithium polymer batteries are better for power banks. Lithium polymer lithium battery is an upgraded product of lithium battery. Relative to the current popular lithium battery, it has the advantages of large capacity, small size, and safety. But the price is also more expensive. With regard to lithium batteries, the characteristics of lithium polymer batteries are as follows: 1. Relatively, the problem of battery leakage is improved, but it has not been completely improved. 2. Can be made into a thin battery: With a capacity of 3.6V250mAh, its thickness can be as thin as 0.5mm. 3. The battery can be designed into a variety of shapes. The manufacturer is not limited to the standard shape, it can be economically made into a suitable size. The polymer battery can add or reduce the thickness of the battery cell according to the needs of customers, and develop new battery cell models, which are cheap and short. 4. Can be made into a single high voltage: the battery with liquid electrolyte can only use several batteries High voltage can be obtained by series connection, and because polymer battery has no liquid itself, it can be made into a multi-layer combination in a single cell to achieve high voltage. 5. The discharge capacity is theoretically 10% higher than that of a lithium battery of the same size. 6. The safety performance is good. The polymer lithium battery adopts aluminum-plastic soft packaging in the 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. Ultra-thin, the battery can be assembled into a credit card. Ordinary liquid lithium batteries use the method of customizing the shell first, and then plugging the positive and negative materials. The thickness of the battery is below 3.6mm, and there is a technical bottleneck. The polymer cell does not have this problem. The thickness can be below 1mm, which is in line with the current mobile phone demand. . 8. The internal resistance of polymer lithium 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. It can reach a level that is in line with international standards. At present, most of the domestic polymer lithium batteries are only soft-pack batteries, using aluminum plastic film as the outer shell, but the electrolyte has not changed. This kind of battery can also be thinner, and its low-temperature discharge characteristics are better than polymer batteries, and the material energy density is basically the same as that of liquid lithium batteries and ordinary polymer batteries, but because of the use of aluminum plastic film, it is better than ordinary liquid lithium batteries. light. In terms of safety, when the liquid just boils, the aluminum-plastic film of the soft-pack battery will naturally bulge or rupture, and it will not explode. Disadvantages of polymer lithium battery: 1. The battery cost is high, and it is difficult to purify the electrolyte system. 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. Disadvantages of lithium batteries 1. Lithium primary batteries have poor safety, and there is a danger of explosion. 2. Lithium cobalt oxide lithium batteries cannot be discharged at high currents, and their safety is poor. 3. Lithium batteries need to protect the circuit to prevent the battery from being overcharged and overdischarged. 4. The processing requirements are high and the cost is high. Compared with lithium batteries, lithium polymer batteries have better safety, operating temperature range, cycle life, and environmental performance, so lithium polymer batteries are better for power banks. 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: Lithium battery failure and analysis of common failure performance of lithium batteries