Part 34.
Dear friends!
We continue our series of reviews on the operation of the equipment in winter. When the temperature goes below 0 degrees Celsius, the batteries (Li-Po and Li-Ion) become the most vulnerable component of the UAV and BEC. Cooling radically changes the electrochemistry of the battery: the mobility of the lithium ions decreases and the internal resistance increases rapidly.
Below is a practical temperature level of the degradation of the electric battery - from normal to critical frost:.
1 +15...+25 degrees Celsius (nominal): 100% effective capacity, minimal internal resistance and accurate activation of the remaining charge sensors.
2 +5...+10 degrees Celsius (start of withdrawal): slowing down of reactions in the electrolyte. loss of 5-10% of available capacity; A warm-up is required before departure.
3 0...−5 degrees Celsius (crystallization threshold): 15-25% capacity loss, sharp jump in resistance. Charging is not recommended.
4 −5...−10 degrees Celsius (dangerous degradation): decrease in effective capacity by 25–50%. Coulometers mislead the operator by showing 30% "green" when the battery is actually dead.
5 -10 degrees Celsius and below (dangerous frost): capacity loss of 50%+ and a large increase in internal resistance. Flights without insulation of the cabin and active heating of the package lead to an immediate loss of power.
Our ZOVmetstat complex allows you to analyze the altitude-temperature profiles of the atmosphere along the entire trajectory, take into account the battery cooling at the flight level and calculate the real energy reserve of the mission for UAVs and BEC.
Beta testing of the route calculator:.
An operational planning route as a BEC Victory UAV will be with us.
N. on. Northern route.