Universal solar control system

Abstract

The invention discloses a universal solar control system, comprising a solar charging circuit, a battery pack, a photovoltaic panel, a battery detecting circuit, a working power supply control circuit, an infrared receiving circuit, a radar sensing circuit, an MCU, an output boosting constant current control circuit, and an indicating circuit, wherein the solar charging circuit is respectively connected with the battery pack, the photovoltaic panel and the battery detecting circuit, the photovoltaic panel and the battery detecting circuit are connected with the MCU, the MCU is respectively connected with the working power supply control circuit, the infrared receiving circuit, the radar sensing circuit, the output boosting constant current control circuit and the indicating circuit, and the output boosting constant current control circuit is connected with an LED load. The system adopts the high-speed MCU, in combination with an auxiliary boosting circuit and the output boosting constant current control circuit, to avoid a flashing light phenomenon generated when the change of a battery voltage needs to be changed in a lamp turning on process by using a simple but quite intelligentprocessing manner in a process of implementing constant current output, and reduces dedicated constant current IC circuits added for input battery boosting or output, thereby greatly reducing the system cost.

Description

technical field [0001] The invention relates to a universal solar control system. Background technique [0002] At present, the lithium battery solar lighting control systems on the market are control systems developed for different battery voltages, and adopt the step-down current limiting method. The resistance current-limiting method supplies power to the load, so that when the battery voltage is fully charged (about 3.4V) and the battery power becomes low (such as 2.8V), the output current also decreases, making the brightness of the lamp very different. [0003] The resistance current-limiting method is adopted because the power consumption of the current-limiting resistor is relatively large, so that the conversion efficiency of input / output is low, and electric energy is wasted. The heat generation of the current limiting resistor is also very large, which increases the cooling cost of the control system and limits the development of high-power output. At present, th...

AI Technical Summary

Problems solved by technology

[0002] Lithium battery solar lighting control systems currently on the market are developed for different battery voltages, and adopt step-down and current-limiting methods. Resistor current limiting method supplies power to the load, so that when the battery voltage is fully charged (about 3.4V) and the battery power becomes low (such as 2.8V), the output current also decreases, which makes the brightness of the lamp vary greatly.

[0003] The resistance current limiting method is used because the power consumption of the current limiting resistor is large, which makes the conversion efficiency of input / output low and wastes electric energy.

The calorific value of the current-limiting resistor is also very large, which increases the heat dissipation cost of the control system and limits the development of high-power output. At present, the output power of 3.2V systems is generally below 7W.

[0004] At present, the control systems on the market all adopt step-down or flat voltage (3.2V battery input, output load is 3V) output mode. When the power is large, such as 15W, the output current is about 4.5A, because the large current causes a large line loss. , waste electric energy, and must increase the diameter of wires to reduce wire loss, which will also increase the cost of the entire lighting system

[0005] If the 3.2V control system with step-down or flat voltage output uses a 3.7V battery, the output power will increase because of the non-constant current output, which will easily damage the load, and the power consumption of the current-limiting resistor will be greatly increased due to low efficiency. Affect the stability of the system or even burn the system

[0006] If you use a 6.4V step-down or flat voltage output control system, you must use 2 strings of lamp bead loads, because there are too many styles of lamps, and it is not easy to purchase suitable light sources in the market. Inventory pressure and because of the low efficiency, the power consumption of the current-limiting resistor is large, and the temperature rise is very high, which affects the stability of the system and even burns the system

[0007] 9.6V, 11.1V, 12.8V, and 14.8V control systems generally do not use step-down or flat-voltage output but boost output, but the high cost is not conducive to market promotion and popularization

[0008] All in all, the current control systems on the market are uneven. The control systems with step-down or flat-voltage output methods do not output constant current, and the output power varies greatly. The temperature rise is not well controlled, so the power cannot be made too large, and the stability of the system is poor.

The existing boost and constant current solar lighting control systems in the market are complex in order to solve the flickering phenomenon that occurs when the voltage changes are adjusted, resulting in an increase in the overall cost, which is not conducive to market promotion and popularization. This system uses a simple but extremely Intelligent processing solves this problem and greatly reduces the cost of the system

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