The difference between polymer battery and rechargeable cylindrical battery

07 Nov 2020

These two battery products currently have a large market volume in the market, but many people know very little about the difference between the two batteries. Now let us analyze polymer batteries and Rechargeable Cylindrical from the aspects of safety performance and advantages. The difference between Pouch Battery.

The advantage of the rechargeable cylindrical battery is the long cycle life. At present, the cycle life of lithium batteries can generally reach more than one thousand times, and it can even reach tens of thousands of times at low depths of discharge. This has far exceeded the other few. The service life of a secondary battery.

Self-discharge is small, and the monthly self-discharge rate of rechargeable cylindrical battery is generally only 6-8%, so this is far less than nickel-cadmium batteries (25-30%) and nickel-hydrogen batteries (30-40%). There is no memory effect. Generally speaking, it should be charged anytime and anywhere according to the regulations, so that it is not easy to reduce the battery performance.

In addition, the rechargeable cylindrical battery is harmless to the natural environment, and almost no toxic and harmful substances can be found. It is a truly "environmentally friendly battery". The working standard voltage of this kind of battery is high, the general working standard voltage is 3.7V, and the working standard of nickel-cadmium and nickel-hydrogen batteries is three times the voltage. Moreover, the specific energy of rechargeable cylindrical battery has reached 140Wh/kg, which is 3 times that of Ni-Cd batteries and 1.5 times that of Ni-MH batteries. Therefore, rechargeable cylindrical battery is due to its long-lasting storage and large storage capacity.

The advantage of polymer batteries is that they are basically the same as lithium batteries except that the electrolyte is a solid polymer instead of a liquid electrolyte. Polymer electrolyte materials are generally various types of plastic films composed of power-law fluids. In the power-law fluid, the main polymer such as polyethylene oxide acts as a non-mobile solvent. The advantage of the lithium polymer battery is that it can be made into a random style and is relatively light. This is because it does not contain heavy metals and has a plastic casing to keep the electrolyte from leaking.

Which performance is better between polymer battery and lithium battery?

The performance between them is relatively good. The idealized lithium polymer battery has a storage capacity of several thousand mA/h, and is safer and more reliable. The solid electrolyte is like a sealing glue, it is not easy to disintegrate naturally during the charging process.