A multi-source intelligent charging circuit

Abstract

This utility model discloses a multi-source intelligent charging circuit, relating to the field of electronic circuits. It includes an intelligent detection module, a transformer module, and a load. The intelligent detection module comprises a main power supply detection circuit, a backup power supply detection circuit, and an emergency power supply detection circuit, all coupled via MOSFETs. The main power supply detection circuit uses a hysteresis comparator to enhance anti-interference capability. The backup power supply detection circuit has a switch K1 for manual priority adjustment. The emergency power supply detection circuit activates when both the main and backup power supplies are abnormal. Priority interlocking is achieved between the circuits via PMOS transistors and diodes, and an RC circuit buffers current surges. This circuit ensures power supply continuity and stability by presetting three power supply priorities and coupling them for switching. It allows for one-click priority switching, enhancing industrial versatility. Furthermore, its pure hardware structure is simple and easy to repair, making it suitable for scenarios requiring multi-source power supply. It effectively utilizes clean energy and improves charging reliability.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuits, and in particular to a multi-source intelligent charging circuit. Background Technology

[0002] With the increasingly complex changes in the power environment, the traditional charging mode lacks multi-level power supply and cannot make timely adjustments to changes in external power sources, which is not conducive to ensuring the continuity of the charging process.

[0003] Furthermore, the state of the load also affects the selection of the charging power source for the special process of charging. In order to save energy and reduce costs, the introduction of clean energy is crucial. In the current power supply circuit, the switching logic between power sources is rigid and cannot be flexibly changed in complex industrial environments, lacking a priority intervention mechanism. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a charging circuit that has stable power supply, strong applicability and can effectively utilize clean energy.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A multi-source intelligent charging circuit, the key of which is that it includes an intelligent detection module, a transformer module and a load; the intelligent detection module is connected to multiple energy inputs and outputs current to the transformer module, and the output terminal of the transformer module is connected to the load;

[0007] The intelligent detection module includes a main power detection circuit, a backup power detection circuit, and an emergency power detection circuit; the main power detection circuit, the backup power detection circuit, and the emergency power detection circuit are connected to each other via MOSFETs.

[0008] Preferably, the main power supply detection circuit includes a comparator U1, a PMOS transistor Q6, a conduction detection lamp LED1, and a transistor Q1; the main power supply input terminal is connected to the collector of Q1 and the voltage divider network composed of R3 and R4; the positive comparison terminal of U1 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U1 is connected to the threshold voltage and the resistor R1 through the resistor R2, and the other end of the resistor R1 is connected to the output terminal of U1; the output terminal of U1 is connected to the source of the PMOS transistor Q6; the drain of Q6 is connected to the positive terminal of LED1 and the RC circuit; the gate of Q6 is connected to pin 2 of switch K1 and the negative terminal of Zener diode D2; the output terminal of the RC circuit is connected to the base of Q1.

[0009] Preferably, the backup power detection circuit includes a comparator U2, a PMOS transistor Q5, a conduction detection lamp LED2, and a transistor Q2; the backup power input terminal is connected to the source of Q5 and the voltage divider network composed of R6 and R5; the drain of Q5 is connected to the collector of Q2; the positive comparison terminal of U2 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U2 is connected to the threshold voltage and the resistor R10 through the resistor R9, with the other end of the resistor R10 connected to the output terminal of U2; the output terminal of U2 is connected to pin 1 of switch K1, the positive terminal of LED2, and the RC circuit; the output terminal of the RC circuit is connected to the base of Q1.

[0010] Preferably, the emergency power detection circuit includes a comparator U3, a PMOS transistor Q4, a conduction detection lamp LED3, and a transistor Q3; the emergency power input terminal is connected to the source of Q4 and the voltage divider network composed of R8 and R7; the drain of Q4 is connected to the collector of Q3; the positive comparison terminal of U3 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U3 is connected to the threshold voltage and the resistor R12 through the resistor R11, with the other end of the resistor R12 connected to the output terminal of U3; the output terminal of U3 is connected to the positive terminal of LED3; the negative terminal of LED3 is connected to the RC circuit; and the output terminal of the RC circuit is connected to the base of Q1.

[0011] Preferably, the negative terminal of LED1 is connected to the gate of Q5 and the positive terminal of diode D1, respectively; the negative terminal of D1 is connected to the gate of Q4; and the negative terminal of LED2 is connected to the gate of Q4.

[0012] Preferably, the output terminals of Q1, Q2, and Q3 are connected to a transformer module.

[0013] The beneficial effects of adopting the above technical solution are as follows:

[0014] This invention achieves continuity and stability in the power supply process by pre-setting three power priority levels and achieving seamless switching through mutual coupling.

[0015] This invention achieves one-click priority switching by setting control button K1 and related circuits, which facilitates practical use and enhances its versatility in industrial applications.

[0016] This invention is implemented using pure hardware circuitry, has a simple structure, and is easy to maintain. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of a multi-source intelligent charging circuit proposed in this utility model;

[0019] Figure 2 This is the circuit diagram of the intelligent detection module in this utility model. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0021] This embodiment proposes a multi-source intelligent charging circuit, such as... Figure 1 It includes an intelligent detection module, a transformer module, and a load; the intelligent detection module connects to multiple energy inputs and outputs current to the transformer module, and the output of the transformer module is connected to the load;

[0022] The intelligent detection module includes a main power supply detection circuit, a backup power supply detection circuit, and an emergency power supply detection circuit; the main power supply detection circuit, the backup power supply detection circuit, and the emergency power supply detection circuit are connected to each other via MOSFETs.

[0023] The intelligent detection module performs priority power supply and voltage detection through circuit coupling. The main power supply has the highest priority. When the main power supply voltage is qualified, the connection between the backup power supply and the emergency power supply and the transformer module will be interrupted. Similarly, when the main power supply voltage is insufficient and the backup power supply voltage is qualified, the connection between the main power supply and the emergency power supply and the transformer module will be interrupted. The emergency power supply will provide power when the voltage of other power supplies is insufficient, ensuring the continuity of the charging process and voltage stability.

[0024] like Figure 2The main power supply detection circuit includes a comparator U1, a PMOS transistor Q6, a continuity detection LED1, and a transistor Q1. The main power input is connected to the collector of Q1 and a voltage divider network composed of resistors R3 and R4. Control information is obtained through the voltage divider network. Q1 is the transistor controlling the power supply; power supply control is achieved by switching Q1 on and off. The non-inverting comparator of U1 is connected to the output of the voltage divider network, and the inverting comparator of U1 is connected to the threshold voltage and resistor R1 through resistor R2. The other end of R1 is connected to the output of U1. This comparator uses a hysteresis comparator. The circuit has a certain anti-interference capability, preventing frequent switching of the circuit due to small voltage fluctuations; the output terminal of U1 is connected to the source of PMOS transistor Q6; the drain of Q6 is connected to the positive terminal of LED1 and the RC circuit respectively; the gate of Q6 is connected to pin 2 of switch K1 and the negative terminal of Zener diode D2 respectively; the output terminal of the RC circuit is connected to the base of Q1. The RC circuit plays a buffering role. During power switching, the RC circuit can reduce the impact of sudden current increase on Q1 and ensure the stability of the output voltage of the intelligent detection module during the switching process.

[0025] The backup power supply detection circuit includes comparator U2, PMOS transistor Q5, conduction detection LED2, and transistor Q2. The backup power supply input is connected to the source of Q5 and the voltage divider network composed of resistors R6 and R5. The drain of Q5 is connected to the collector of Q2. The non-inverting comparator of U2 is connected to the output of the voltage divider network, and the inverting comparator of U2 is connected to the threshold voltage and resistor R10 through resistor R9. The other end of R10 is connected to the output of U2. The output of U2 is connected to pin 1 of switch K1, the positive terminal of LED2, and the RC circuit. The output of the RC circuit is connected to the base of Q1. In this circuit, when the backup power supply voltage passes the detection, the main power supply can be interrupted by pressing button K1 to reset the priority. When K1 is closed, the backup power supply has a higher priority than the main power supply.

[0026] The emergency power detection circuit includes a comparator U3, a PMOS transistor Q4, a continuity detection LED3, and a transistor Q3. The emergency power input is connected to the source of Q4 and the voltage divider network composed of R8 and R7. The drain of Q4 is connected to the collector of Q3. The positive comparator of U3 is connected to the output of the voltage divider network, and the negative comparator of U3 is connected to the threshold voltage and the resistor R12 through resistor R11. The other end of R12 is connected to the output of U3. The output of U3 is connected to the positive terminal of LED3. The negative terminal of LED3 is connected to the RC circuit. The output of the RC circuit is connected to the base of Q1.

[0027] The cathode of LED1 is connected to the gate of Q5 and the anode of diode D1; the cathode of D1 is connected to the gate of Q4; and the cathode of LED2 is connected to the gate of Q4. The circuits are interconnected via PMOS transistors Q4 and Q5, enabling the automatic disconnection of power to lower-priority circuits when higher-priority circuits are powered.

[0028] LED1 indicates the working status of the main power supply detection circuit, while LED2 and LED3 indicate the voltage detection status of the backup power supply and emergency power supply detection circuits. Since the main power supply usually powers the circuit most of the time, it is only necessary to observe the on / off state of LED1. LED3 provides an early warning for emergency power supply maintenance. When LED2 is emitting light stably, the priority can be changed through K1.

[0029] The output terminals of Q1, Q2, and Q3 are connected to the transformer module.

[0030] In this embodiment, the battery is charged via the power grid, solar energy, and emergency power. Considering the stability of battery charging, the power grid is used as the main power source, and solar energy is used as a backup power source.

[0031] Normally, after the grid voltage is verified by the hysteresis comparator, the gate of Q6 is at a low potential, and Q6 is turned on. The current flows through LED1, raising the voltage at the gates of Q5 and Q4, cutting off the circuit. At this time, Q2 and Q3 are cut off, and there is no output. Only the main power supply circuit outputs current. When the grid power supply fails, the negative terminal of LED1 is at a low potential, and the gate of Q5 is at a low potential, so Q5 is turned on. If the backup solar voltage is sufficient, the current flows through LED2 to suppress the conduction of Q4, and the backup power supply circuit outputs current. When the voltage of both the main and backup power supplies is insufficient, the gate of Q4 is at a low level, and the emergency power detection circuit outputs current.

[0032] When the load is in standby mode, in order to save energy, press K1 to change the circuit priority. When the voltages of the main power supply and the backup power supply are both in line, the gate of Q6 is at a high potential and is in the off state. At this time, Q5 is turned on and Q4 is turned off, and the backup power supply detection circuit outputs first.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-source intelligent charging circuit, characterized in that, It includes an intelligent detection module, a transformer module, and a load; the intelligent detection module is connected to multiple energy inputs and outputs current to the transformer module, and the output terminal of the transformer module is connected to the load; The intelligent detection module includes a main power detection circuit, a backup power detection circuit, and an emergency power detection circuit; the main power detection circuit, the backup power detection circuit, and the emergency power detection circuit are connected to each other via MOSFETs.

2. The multi-source intelligent charging circuit according to claim 1, characterized in that, The main power supply detection circuit includes a comparator U1, a PMOS transistor Q6, a conduction detection lamp LED1, and a transistor Q1. The main power supply input terminal is connected to the collector of Q1 and a voltage divider network composed of resistors R3 and R4. The positive comparison terminal of U1 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U1 is connected to the threshold voltage and resistor R1 through resistor R2. The other end of R1 is connected to the output terminal of U1. The output terminal of U1 is connected to the source of the PMOS transistor Q6. The drain of Q6 is connected to the positive terminal of LED1 and an RC circuit. The gate of Q6 is connected to pin 2 of switch K1 and the negative terminal of Zener diode D2. The output terminal of the RC circuit is connected to the base of Q1.

3. The multi-source intelligent charging circuit according to claim 1, characterized in that, The backup power detection circuit includes a comparator U2, a PMOS transistor Q5, a conduction detection lamp LED2, and a transistor Q2. The backup power input terminal is connected to the source of Q5 and the voltage divider network composed of R6 and R5. The drain of Q5 is connected to the collector of Q2. The positive comparison terminal of U2 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U2 is connected to the threshold voltage and the resistor R10 through the resistor R9. The other end of the resistor R10 is connected to the output terminal of U2. The output terminal of U2 is connected to pin 1 of switch K1, the positive terminal of LED2, and the RC circuit. The output terminal of the RC circuit is connected to the base of Q1.

4. The multi-source intelligent charging circuit according to claim 1, characterized in that, The emergency power detection circuit includes a comparator U3, a PMOS transistor Q4, a conduction detection lamp LED3, and a transistor Q3. The emergency power input terminal is connected to the source of Q4 and a voltage divider network composed of R8 and R7. The drain of Q4 is connected to the collector of Q3. The positive comparison terminal of U3 is connected to the output terminal of the voltage divider network, and the negative comparison terminal of U3 is connected to the threshold voltage and the resistor R12 through a resistor R11. The other end of the resistor R12 is connected to the output terminal of U3. The output terminal of U3 is connected to the positive terminal of LED3. The negative terminal of LED3 is connected to an RC circuit. The output terminal of the RC circuit is connected to the base of Q1.

5. A multi-source intelligent charging circuit according to claim 1, characterized in that, The negative terminal of LED1 is connected to the gate of Q5 and the positive terminal of diode D1, respectively; the negative terminal of D1 is connected to the gate of Q4; and the negative terminal of LED2 is connected to the gate of Q4.

6. The multi-source intelligent charging circuit according to claim 1, characterized in that, The output terminals of Q1, Q2, and Q3 are connected to the transformer module.

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