Automatic control method and device for solar supercapacitor power supply

1. An automatic control method for a solar supercapacitor power supply, comprising:

obtaining a current state of a power supply device;

obtaining a capacitor voltage of an energy storage element;

in a case that the state of the power supply device is a pure charging state, if the capacitor voltage exceeds an initial discharge voltage, the power supply device switches to a power supply state and begins to discharge, such that an output port outputs a voltage; and if the capacitor voltage does not exceed the initial discharge voltage, the pure charging state is maintained and the power supply device continues to be charged, with a voltage of the output port being zero;

in a case that the state of the power supply device has been switched to the power supply state, if the capacitor voltage is not lower than a termination discharge voltage, the power supply device maintains the power supply state; and if the capacitor voltage is lower than the termination discharge voltage, the power supply device is switched to the pure charging state with the voltage of the output port dropping to zero; and

in the automatic control method for the solar supercapacitor power supply, the initial discharge voltage is higher than the termination discharge voltage, and a charge and discharge with hysteresis effect is achieved.

2. A solar power supply device, comprising: a solar panel, a supercapacitor, and a charge and discharge managing module; wherein

the solar panel is configured to generate a current for charging the supercapacitor;

the supercapacitor is configured to store power; when the power supply device is in a pure charging state, the supercapacitor stores the power generated by the solar panel, and the supercapacitor is not connected to an output port; when the power supply device is in a power supply state, the supercapacitor is connected to the output port to provide an original voltage for discharge, and able to be charged at the same time; and

the charge and discharge managing module is connected to the solar panel and the supercapacitor, and the charge and discharge managing module is configured to achieve a capacitor charging supervision and controlling function, a state monitoring and controlling function and a discharge managing function, to manage two states comprising the pure charging state and the power supply state, and two power thresholds comprising the initial discharge voltage and the termination discharge voltage.

3. The solar power supply device of claim 2 , wherein the charge and discharge managing module is configured to switch on a first electronic switch and a second electronic switch in a front end and a back end of a power supply path respectively by detecting a voltage from a low threshold to a high threshold; the charge and discharge managing module is further configured to lock an electronic interlock after the second electronic switch with the high-threshold is switched on, to ensure that when the second electronic switch is switched on in the power supply path, even if a voltage of an input port drops below the high threshold for switching on the second electronic switch but still higher than the low threshold for switching on the first electronic switch, the first electronic switch and the second electronic switch are maintained switched on; when the voltage of the input port is lower than the low threshold, the charge and discharge managing module is further configured to switch off the first electronic switch and the second electronic switch at the same time to disconnect the power supply path; thereby during the voltage drop of the supercapacitor, when a voltage of the supercapacitor is lower than the high threshold, the first electronic switch and the second electronic switch are not switched off; and when the voltage of the supercapacitor is lower than a low battery threshold, the first electronic switch and the second electronic switch are switched off together, to achieve staged switching and locking, in order to achieve a charge and discharge with hysteresis effect.

4. The solar power supply device of claim 2 , wherein the supercapacitor can be replaced with a rechargeable battery.

5. The solar power supply device of claim 2 , wherein the solar panel can be replaced with an environmental power supply, wherein the environmental power supply is a wind power supply, a temperature power supply, a vibration power supply, a sport power supply, a pressure power supply, an electromagnetic wave power supply, a water flow power supply or a human power supply.

6. The solar power supply device of claim 2 , further comprising a control logic circuit, configured to control a maximum voltage of the supercapacitor to be charged and prevent the supercapacitor from being overcharged.

7. The solar power supply device of claim 2 , wherein an output voltage of the output port decreases with a decrease of a remaining power of the supercapacitor, or is a stabilized voltage.

8. The solar power supply device of claim 6 , further comprising an integration port, formed by directly integrating the control logic circuit and the output port into a front end of a powered equipment; wherein the integration port is externally connected to the solar panel and the supercapacitor, to achieve a solution that a solar panel charging power supply, the energy storage element, and a control module are physically separated and a logic power supply module actually keeps unchanged.

9. The solar power supply device of claim 2 , further comprising a battery; when the power of the supercapacitor is lower than a low termination discharge voltage (amount), the supercapacitor is no longer discharged, the output port is converted to supply power by the battery or other power supplies, the supercapacitor turns into the pure charging state, and a powered equipment can still work, to ensure that a solar-charged supercapacitor is used by the power supply device first when there is sunlight, and the battery is started only when the supercapacitor has not been charged for a long time, to ensure that the equipment can work; when the power of the supercapacitor rises above an initial discharge threshold again, the battery is switched off from discharge, and the supercapacitor is started to discharge, entering a supercapacitor working state; in this way, a maximum utilization of the solar power supply device can be ensured, and the equipment can also be prevent from stopping working under extreme conditions.