The rated voltage of a normal pouch lipo cell is 3.70V and the maximum charging voltage is 4.20V, which has become common knowledge for lipo batteries. In recent years, a new kind of lithium polymer battery-HV Lipo battery has appeared. It generally refers to a battery of which single battery cell voltage can reach 4.35V~4.45V under full charged, rather than a numerical high voltage battery by connecting the normal lipo battery cells with a full charge voltage of 4.20V in series.
The HV Lipo battery has a higher rated voltage (3.80V~3.85V) and charging voltage (4.35V~4.45V). The discharge cut-off voltage remains 3.2V~3.3V. However, we recommend limiting the discharge to no more than 80% of the HV Lipo battery's total capacity. Otherwise, the lifetime of the battery will be shortened. The maximum voltage of a lipo battery depends on the material characteristics of the battery's anode, cathode, and electrolyte. The traditional electrolyte continues to oxidize and decompose under high voltage and the transition metal ions of the cathode material dissolve, which limits the maximum charging voltage of the battery. At present, lithium cobalt oxide has been widely researched and applied as a high voltage anode material.
In practical applications, only some of the lithium ions inside the lipo battery can be inserted and ejected reversibly. Increasing the operating voltage of the battery can significantly increase the energy density. For example, increasing the operating voltage from 4.20V to 4.35V can increase the energy density by about 15%. High voltage lipo battery cells have higher energy density and their discharge platform is relatively higher. The higher voltage lipo battery can discharge more power under the same volume and usage conditions. They can further increase the endurance time when used in agriculture drones or aerial drones.
In terms of discharge rate, high voltage lipo batteries have a higher discharge rate and stronger power. Therefore, high-voltage lipo batteries should theoretically be more suitable for applications that require high rate discharge. For example, they can better play their advantages in FPV competitions.
ManiaX Power Tech's HV Lipo battery lines have the following typical characteristics:
High discharge platform and long cyclelife under high-rate discharge.
High energy-density with high single cell's capacity, and 15% longer endurance time than normal lipo batteries.
Good battery cell consistency and reliable power performance.
Low internal resistance and less self-heating & self-discharge.
