Why is the price of drone lithium-ion batteries high?

The first is the characteristic. The UAV must get rid of its own gravity to do work. Therefore, the net weight of the battery is relatively high, and the expansion of the battery volume will cause the net weight to increase. Therefore, there are only polymer lithium-ion batteries with a lighter net weight under the same volume. It can meet the requirements. On the other hand, the UAV has a particularly high requirement on the output power of the battery. When the accelerator pedal is raised to the maximum speed from the hovering situation, the battery output power will increase rapidly, and the output power will be several times in a short period of time. Promote. Such output power conversion can only be considered by polymer lithium-ion batteries. In fact, 18650 batteries can also be used in series and parallel. The batteries of Tesla electric vehicles are 7000 pieces of 18650 batteries in series and parallel. Furthermore, it can meet the requirement of high power in a moment, which is obviously unsuitable on unmanned aircraft. Therefore, in terms of characteristics, only polymer lithium-ion batteries can consider such application requirements. Naturally, even polymer lithium-ion batteries wear out very quickly on unmanned aircraft. A 5800Mah battery for DJI Phantom 4 can hold up to 89Wh of kinetic energy. A 20000Mah mobile power supply can generally only hold kinetic energy. About 70Wh, and such a 5800Mah battery only has 30 minutes of sailing time at the supporting point. It can be imagined how much work pressure is on the battery. The long-term performance of polymer lithium-ion batteries is very fast in this type of office environment. The rapid charging and discharging within a short period of time will also cause the battery temperature to rise rapidly, which has prompted the unmanned aircraft battery to require further safety maintenance. The unmanned aircraft batteries of DJI UAVs are called intelligent navigation batteries, because in addition to polymer lithium-ion batteries, the batteries also have a large number of components. First of all, in order to better maintain the safety of the battery during long-term work, the switching power supply intelligent management system can carry out battery charging and maintenance on the battery, which can make the battery work within the scope of safety from beginning to end. Secondly, if the battery is left idle for a long period of time, it will endanger the battery life. The intelligent battery of DJI UAV has a built-in battery to store lithium-ion battery life maintenance, which can be fully charged and discharged under long-term idle conditions. Battery usage time. This set of technology is very similar to the streamlining of Tesla's switching power supply intelligent management system. Therefore, no matter from the perspective of characteristics or safety, the battery regulations used in unmanned aircraft must be higher than the 18650 batteries commonly used in general mobile power sources, which also makes them expensive. 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: How to prevent the harm of waste batteries