Why are the lithium batteries used in drones more expensive? This is because what the drone uses is called a driving force battery, which is different from a normal battery. It can realize the charging and discharging of high current in an instant, because the equipment needs to give high power conversion and output requirements in a short time. Therefore, its price will be more expensive than conventional lithium batteries.
We know that for the drone to fly, it must get rid of its own gravity, so there are very strict requirements for the net weight of the battery. If the volume of the battery is enlarged, it will obviously increase the weight of the battery. Therefore, only polymer lithium batteries with a lighter net weight under the same volume can meet the product requirements. On the other hand, drones have high requirements for the output power of batteries. If the accelerator pedal is quickly increased from the hovering state to the maximum speed, the output power of the battery will also increase rapidly, and the internal output power will be increased several accelerator times in a short time. In that way, the output power change can only be considered by polymer lithium batteries.
In fact, 18650 batteries can also achieve such performance according to series and parallel. Tesla’s electric vehicle battery is the crystallization of more than 7,000 18650 batteries in series and parallel, and then it can bear the high-power requirements in an instant. This is obviously not applicable to drones. So, in terms of characteristics, only polymer lithium-ion batteries can meet the application requirements of drones.
Of course, even with polymer lithium batteries, the energy consumption of drones is relatively fast. The 5800Mah used by a well-known brand drone can hold kinetic energy of 89WH. However, the kinetic energy that a 20000mAh mobile power supply can hold is generally only about 70WH. The 5800mAh battery can only support 30 minutes of battery life. It is conceivable how much pressure the drone puts on the battery. The polymer lithium battery needs to work frequently in such an environment. The energy consumption of the battery is fast, and the rapid charging of the battery in a short time will cause the battery temperature to rise rapidly, which makes the drone battery must further ensure safety.
The drone battery is called the intelligent navigation battery. Because in addition to the polymer lithium battery, there are a lot of components on the battery.
First of all, to better maintain the safety of the battery during long-term use, the switching power supply intelligent management system can carry out battery charging and maintenance on the battery, and can keep the working environment of the battery within the scope of safety from beginning to end;
Secondly, if the battery is left idle for a long time, it will affect the service life of the battery. The intelligent battery has a battery storage lithium battery life maintenance, which can be fully automatically charged and discharged in a long-term idle state , increasing the battery life. This technology is very similar to the Tesla car switching power supply intelligent management system, very simple but very practical;
Therefore, whether from the perspective of product characteristics or safety, the battery requirements for drones are generally higher than the 18650 batteries commonly used in mobile power supplies, which is why they are expensive.
