Energy management control system suitable for solar-powered unmanned aerial vehicle and control method thereof

An energy management system suitable for a solar-powered unmanned aerial vehicle, comprising:

• a photovoltaic module, an MPPT controller, a first DC-DC circuit, a battery pack, a first anti-reverse circuit, an ESC, a BLDC, a second DC-DC circuit, a second anti-reverse circuit, an onboard controller and a communication link;
• wherein
• the MPPT controller is powered by the photovoltaic module and is used to adjust the output voltage and current of the photovoltaic module to achieve the maximum power output;
• the output end of the MPPT controller is connected with the input end of the first DC-DC circuit, and the output end of the first DC-DC circuit is connected with the battery pack for controlling charging the battery pack;
• the battery pack supplies power to the ESC via the first anti-reverse circuit, and the ESC drives the BLDC to rotate;
• at the same time, the battery pack is also connected with the input end of the second DC-DC circuit, and then is connected in parallel to the power supply end of the ESC via the second anti-reverse circuit;
• the second DC-DC circuit uses an adjustable DC-DC circuit which changes the output voltage value according to the input signal;
• and in the initial state of the system, the second DC-DC circuit does not operate and does not supply power to the ESC;
• the communication link is used to transmit the original accelerator information output by the flight control system to the on-board controller;
• the on-board controller receives the input and output voltage and current information from the MPPT controller and the output voltage and current information of the first DC-DC circuit for monitoring circuit state;
• corresponds the original accelerator information transmitted by the communication link to the power demand of the power system, and outputs two control signals at the same time according to the relationship between the current power demand of the power system and the set cruise power threshold, wherein the first control signal is used to control the accelerator amount of the ESC, and the second control signal is used to control the on-off of the second DC-DC circuit and its output voltage value during operation.