Intelligent control circuit for supplying power to solar mosquito killer lamp

Abstract

The utility model discloses an intelligent control circuit for supplying power to a solar mosquito killer lamp. The intelligent control circuit comprises a solar panel, a USB charging port, an MCU, a lithium battery charging management module and a lithium battery pack. The output end of the solar panel is electrically connected with an electronic switch Q1, and the output end of the electronic switch Q1 is electrically connected with the VIN end of the lithium battery charging management module; the output end of the USB charging port is electrically connected with an electronic switch Q2, and the output end of the electronic switch Q2 is electrically connected with the VIN end of the lithium battery charging management module; a voltage division circuit is electrically connected between the SPV end of the MCU and the input end of the electronic switch Q1; the SWEN end of the MCU is electrically connected with the control end of the electronic switch Q2. According to the scheme, the electronic switch Q1 and the electronic switch Q2 which are low in internal resistance are added to reduce loss caused by large internal resistance of the diode and large divided voltage, meanwhile, when the circuit is provided with the electronic switch Q2, the electronic switch Q1 can be automatically switched off, and the solar panel can be prevented from being reversely charged and damaged.

Description

Technical Field

[0001] This utility model relates to the field of solar power supply technology, and in particular to an intelligent control circuit for powering a solar-powered mosquito killer lamp. Background Technology

[0002] Solar-powered mosquito killers typically use either a solar panel or a charger to charge the battery. The battery's energy then powers the LED light through a circuit for illumination and also supplies power to a boost circuit. This circuit generates high voltage to kill mosquitoes and simultaneously produces specific wavelengths of ultraviolet light to attract mosquitoes, enhancing the mosquito-killing effect. When the solar panel cannot charge the battery, the charger needs to pre-charge the battery to ensure the product's mosquito-killing or lighting functions.

[0003] Existing power supply methods involve the solar panel charging the lithium battery pack via diodes and PNP transistors, or the charger charging the lithium battery pack via diodes. Both of these methods result in increased circuit losses due to voltage drops caused by the diodes. Furthermore, if the diode connected to the solar panel breaks down and short-circuits, the charging port will continue to charge the solar panel, potentially causing it to burn out. Therefore, this solution proposes an intelligent control circuit for powering a solar-powered mosquito killer lamp to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent control circuit for powering a solar-powered mosquito killer lamp, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an intelligent control circuit for powering a solar-powered mosquito killer lamp, comprising a solar panel, a USB charging port, an MCU, a lithium battery charging management module, and a lithium battery pack;

[0006] The output terminal of the solar panel is electrically connected to an electronic switch Q1, and the output terminal of the electronic switch Q1 is electrically connected to the VIN terminal of the lithium battery charging management module.

[0007] The output terminal of the USB charging port is electrically connected to an electronic switch Q2, and the output terminal of the electronic switch Q2 is electrically connected to the VIN terminal of the lithium battery charging management module.

[0008] A voltage divider circuit is electrically connected between the SP_V terminal of the MCU and the input terminal of the electronic switch Q1. The voltage divider circuit is used by the MCU to control mosquito killing and lighting.

[0009] The SW_EN terminal of the MCU is electrically connected to the control terminal of the electronic switch Q2, and the TypeC_V terminal of the MCU is electrically connected to the input terminal of the electronic switch Q2.

[0010] An inductor L1 is electrically connected between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. The inductor L1, in conjunction with the lithium battery charging management module, is used to supply power for mosquito control and lighting.

[0011] Preferably, the voltage divider circuit includes a diode D1 and a resistor R1. The input terminal of the diode D1 is electrically connected to the output terminal of the solar panel, the output terminal of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the SP_V terminal of the MCU.

[0012] Preferably, the voltage divider circuit further includes a resistor R2 and a capacitor C1. One end of the resistor R2 and the capacitor C1 is connected in parallel between the resistor R1 and the SP_V terminal of the MCU. The other end of the resistor R2 and the capacitor C1 is electrically connected to a resistor R3. The end of the resistor R3 away from the capacitor C1 is electrically connected to the control terminal of the electronic switch Q1. The connection end of the resistor R2, the capacitor C1 and the resistor R3 is grounded.

[0013] Preferably, resistors R4 and R8 are connected in parallel to the TypeC_V terminal of the MCU. The end of resistor R4 away from the TypeC_V terminal of the MCU is electrically connected to the input terminal of electronic switch Q2 and the control terminal of electronic switch Q1. The end of resistor R8 away from the TypeC_V terminal of the MCU is grounded.

[0014] Preferably, a resistor R7 is electrically connected between the SW_EN terminal of the MCU and the control terminal of the electronic switch Q2.

[0015] Preferably, a resistor R9 is electrically connected between the EN terminal of the MCU and the lithium battery charging management module.

[0016] Preferably, a resistor R6 is connected in parallel between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. A capacitor C4 and a capacitor C5 are electrically connected to the two ends of the resistor R6, respectively. The capacitor C4 is located at the end of the resistor R6 closer to the lithium battery pack, and the capacitor C5 is located at the end of the resistor R6 closer to the lithium battery charging management module. The ends of the capacitors C4 and C5 furthest from the resistor R6 are grounded.

[0017] Preferably, a diode D2 is electrically connected to the VBAT+ terminal of the lithium battery pack, and the output terminal of the diode D2 is electrically connected to the VDD terminal of the MCU.

[0018] Preferably, a Zener diode ZD1 is connected in parallel to the VDD terminal of the MCU, a capacitor C6 is electrically connected to the input terminal of the Zener diode ZD1, a diode D3 is electrically connected to the input terminal of the capacitor C6, and a resistor R10 is electrically connected between the input terminal of the diode D3 and the VIN terminal of the lithium battery charging management module.

[0019] The technical effects and advantages of this utility model are as follows:

[0020] This solution reduces losses caused by the high internal resistance of diodes and the large voltage division caused by adding two low internal resistance electronic switches Q1 and Q2. At the same time, when electronic switch Q2 is turned on, electronic switch Q1 will be automatically turned off to prevent the solar panel from being reverse charged and damaged. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of the entire present invention. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figure 1 The intelligent control circuit for a solar-powered mosquito killer lamp shown includes a solar panel, a USB charging port, an MCU, a lithium battery charging management module, and a lithium battery pack.

[0024] The output terminal of the solar panel is electrically connected to an electronic switch Q1, and the output terminal of the electronic switch Q1 is electrically connected to the VIN terminal of the lithium battery charging management module.

[0025] The output of the USB charging port is electrically connected to an electronic switch Q2, and the output of the electronic switch Q2 is electrically connected to the VIN terminal of the lithium battery charging management module.

[0026] A voltage divider circuit is electrically connected between the SP_V terminal of the MCU and the input terminal of the electronic switch Q1. The voltage divider circuit is used by the MCU to control mosquito killing and lighting.

[0027] Specifically, the voltage divider circuit includes diode D1 and resistor R1. The input terminal of diode D1 is electrically connected to the output terminal of the solar panel, the output terminal of diode D1 is electrically connected to one end of resistor R1, and the other end of resistor R1 is electrically connected to the SP_V terminal of the MCU.

[0028] Furthermore, the voltage divider circuit also includes a resistor R2 and a capacitor C1. One end of the resistor R2 and the capacitor C1 is connected in parallel between the resistor R1 and the SP_V terminal of the MCU. The other end of the resistor R2 and the capacitor C1 is electrically connected to a resistor R3. The end of the resistor R3 away from the capacitor C1 is electrically connected to the control terminal of the electronic switch Q1. The connection end of the resistor R2, the capacitor C1 and the resistor R3 is grounded.

[0029] The SW_EN terminal of the MCU is electrically connected to the control terminal of the electronic switch Q2, and the TypeC_V terminal of the MCU is electrically connected to the input terminal of the electronic switch Q2.

[0030] Specifically, resistors R4 and R8 are connected in parallel to the TypeC_V terminal of the MCU. The end of resistor R4 away from the TypeC_V terminal of the MCU is electrically connected to the input terminal of electronic switch Q2 and the control terminal of electronic switch Q1. The end of resistor R8 away from the TypeC_V terminal of the MCU is grounded. Resistor R7 is electrically connected between the SW_EN terminal of the MCU and the control terminal of electronic switch Q2. Resistor R9 is electrically connected between the EN terminal of the MCU and the lithium battery charging management module.

[0031] An inductor L1 is electrically connected between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. The inductor L1, together with the lithium battery charging management module, is used to supply power for mosquito killing and lighting.

[0032] Specifically, a resistor R6 is connected in parallel between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. Capacitors C4 and C5 are electrically connected to the two ends of the resistor R6, respectively. Capacitor C4 is located at the end of the resistor R6 closest to the lithium battery pack, and capacitor C5 is located at the end of the resistor R6 closest to the lithium battery charging management module. The ends of capacitors C4 and C5 furthest from the resistor R6 are grounded.

[0033] Furthermore, a diode D2 is electrically connected to the VBAT+ terminal of the lithium battery pack. The output terminal of diode D2 is electrically connected to the VDD terminal of the MCU. A Zener diode ZD1 is connected in parallel to the VDD terminal of the MCU. A capacitor C6 is electrically connected to the input terminal of Zener diode ZD1. A diode D3 is electrically connected to the input terminal of capacitor C6. A resistor R10 is electrically connected between the input terminal of diode D3 and the VIN terminal of the lithium battery charging management module.

[0034] It's important to note that a Zener diode is a special type of diode. Its primary function is to provide voltage regulation. It operates at its breakdown voltage (Zener voltage) and maintains a constant voltage, making it commonly used in voltage reference and regulated power supply circuits. Unlike ordinary diodes, Zener diodes can safely enter a breakdown state under reverse bias without damage. This allows them to maintain a stable voltage output at a specific reverse voltage. Zener diodes are also frequently used in protection circuits to prevent current exceeding a certain voltage from flowing into other components, thus avoiding damage.

[0035] The working principle is as follows: The present invention adds electronic switches Q1 and Q2. When there is sufficient sunlight, the solar panel generates voltage, which supplies power to the lithium battery charging management module through electronic switch Q1. The lithium battery charging management module then provides charging current to the lithium battery pack.

[0036] When the sunlight dims, the MCU uses a voltage divider circuit composed of diode D1, resistors R1 and R2, and capacitor C1. When the MCU's SP_V terminal detects a low voltage, the MCU will automatically turn on the subsequent mosquito-killing and lighting circuits.

[0037] While the solar panel is supplying power, if the charger is plugged into the USB charging port and supplies power to the lithium battery charging management module through the electronic switch Q2, the MCU detects the start of charging through the TypeC_V terminal. The MCU will then output a low level through the SW_EN terminal to fully turn on Q2, quickly supplying power to the lithium battery charging management module. Since the drain-source voltage of the electronic switch Q2 is extremely low when it is turned on, it also pulls down the gate-source voltage of Q1. The conduction condition of Q1 does not exist, so Q1 will automatically turn off. The solar panel will also stop supplying power to the lithium battery charging management module through the electronic switch Q1. At the same time, the voltage of the charger's USB port cannot supply power to the solar panel through the electronic switch Q1, thus preventing the solar panel from being damaged by reverse charging. At this time, the on-resistance of Q2 is extremely low, which also reduces the power loss caused by the high internal resistance of the diode in the original solution and improves the working efficiency of the power supply end.

[0038] In this solution, the lithium battery pack forms a boost circuit through inductor L1 and lithium battery charging management module to generate a stable voltage Vout, which powers the subsequent lighting and mosquito-killing circuits.

[0039] Capacitor C4 is a filter capacitor that reduces the ripple of the lithium battery pack's output voltage. Resistor R6 and capacitor C5 together form a filter circuit to provide the MCU with the voltage value of the lithium battery pack for detection.

[0040] While the boost circuit is working, the MCU needs to output a high level through the EN pin to maintain the continuous operation of the boost circuit;

[0041] The lithium battery pack powers the MCU through diode D2. The voltage at the charging end also charges capacitor C6 through resistor R11 and diode D3, providing the MCU with dual operating voltages and preventing the MCU from entering a sleep state due to undervoltage.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intelligent control circuit for powering a solar-powered mosquito killer lamp, characterized in that, Includes solar panels, USB charging ports, MCUs, lithium battery charging management modules, and lithium battery packs; The output terminal of the solar panel is electrically connected to an electronic switch Q1, and the output terminal of the electronic switch Q1 is electrically connected to the VIN terminal of the lithium battery charging management module. The output terminal of the USB charging port is electrically connected to an electronic switch Q2, and the output terminal of the electronic switch Q2 is electrically connected to the VIN terminal of the lithium battery charging management module. A voltage divider circuit is electrically connected between the SP_V terminal of the MCU and the input terminal of the electronic switch Q1. The voltage divider circuit is used by the MCU to control mosquito killing and lighting. The SW_EN terminal of the MCU is electrically connected to the control terminal of the electronic switch Q2, and the TypeC_V terminal of the MCU is electrically connected to the input terminal of the electronic switch Q2. An inductor L1 is electrically connected between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. The inductor L1, in conjunction with the lithium battery charging management module, is used to supply power for mosquito control and lighting.

2. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, The voltage divider circuit includes a diode D1 and a resistor R1. The input terminal of the diode D1 is electrically connected to the output terminal of the solar panel, the output terminal of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the SP_V terminal of the MCU.

3. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 2, characterized in that, The voltage divider circuit also includes a resistor R2 and a capacitor C1. One end of the resistor R2 and the capacitor C1 is connected in parallel between the resistor R1 and the SP_V terminal of the MCU. The other end of the resistor R2 and the capacitor C1 is electrically connected to a resistor R3. The end of the resistor R3 away from the capacitor C1 is electrically connected to the control terminal of the electronic switch Q1. The connection end of the resistor R2, the capacitor C1 and the resistor R3 is grounded.

4. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, The MCU's TypeC_V terminal is connected to resistors R4 and R8. The end of resistor R4 furthest from the MCU's TypeC_V terminal is electrically connected to the input terminal of electronic switch Q2 and the control terminal of electronic switch Q1. The end of resistor R8 furthest from the MCU's TypeC_V terminal is grounded.

5. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, A resistor R7 is electrically connected between the SW_EN terminal of the MCU and the control terminal of the electronic switch Q2.

6. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, A resistor R9 is electrically connected between the EN terminal of the MCU and the lithium battery charging management module.

7. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, A resistor R6 is connected in parallel between the lithium battery charging management module and the VBAT+ terminal of the lithium battery pack. Capacitors C4 and C5 are electrically connected to the two ends of the resistor R6, respectively. Capacitor C4 is located at the end of the resistor R6 closer to the lithium battery pack, and capacitor C5 is located at the end of the resistor R6 closer to the lithium battery charging management module. The ends of capacitors C4 and C5 furthest from the resistor R6 are grounded.

8. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 1, characterized in that, The VBAT+ terminal of the lithium battery pack is electrically connected to a diode D2, and the output terminal of the diode D2 is electrically connected to the VDD terminal of the MCU.

9. The intelligent control circuit for powering a solar-powered mosquito killer lamp according to claim 8, characterized in that, A Zener diode ZD1 is connected in parallel to the VDD terminal of the MCU. A capacitor C6 is electrically connected to the input terminal of the Zener diode ZD1. A diode D3 is electrically connected to the input terminal of the capacitor C6. A resistor R10 is electrically connected between the input terminal of the diode D3 and the VIN terminal of the lithium battery charging management module.

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