The life for Li-po battery
- Apr 09, 2018 -

The life for Li-po battery

Polymer battery, also known as polymer lithium battery or lithium polymer battery, is a new generation of rechargeable batteries developed in this century. The replacement of traditional liquid lithium batteries has accelerated in the past two years. As a result, the life of polymer batteries has become the goal pursued by battery manufacturers in the industry. In the application market, polymer battery life has become one of the consumers' concerns.


Polymer battery life has a great relationship with its performance. The polymer battery is also called a polymer battery. From the appearance point of view, the polymer battery is an aluminum plastic case outer package, which is different from the metal shell of the liquid lithium battery. The reason that the aluminum-plastic shell can be used is that the polymer battery uses some colloidal substances to help the battery plates fit or absorb electrolytes, thereby greatly reducing the amount of liquid electrolyte used.


The structural improvement makes the polymer battery have the advantages of high energy density, more miniaturization and ultra-thinning. Compared with liquid lithium batteries, polymer batteries last longer, up to 500 cycles.


The theoretical definition of lithium polymer battery life is the same as that of all rechargeable batteries, and the number of fully chargeable and dischargeable cycles that can be used, but the useful polymer battery life varies depending on the method of use and the storage method. These influencing factors are different. Including: the number of full charge and discharge cycles, battery voltage, storage temperature, etc.


Tests have proved that the deeper the depth of discharge, not only the polymer lithium battery life in theory is significantly reduced, but also from the total output power, it will be less than the total amount of light put; if the battery voltage is always at the highest value, it will This results in faster battery capacity loss and shorter polymer battery life. The use and storage at higher temperatures will also increase the self-discharge rate of the battery and lead to premature or increased permanent loss, eventually leading to the end of the life of the polymer battery.


It can be seen that the lithium polymer battery life is different from the theory and use, but the structural characteristics determine the polymer battery life has a great advantage over traditional batteries, for practical factors that affect the life of the polymer battery, from the shallow charge Put shallow, reasonable voltage, suitable storage temperature to proceed to extend the life of polymer lithium battery.