Solar energy storage power supply switching circuit

Abstract

The utility model discloses a solar energy storage power supply switching circuit, which relates to the field of power supply and comprises a solar power supply module used for converting solar energy into electric energy and outputting the electric energy to an energy storage module through a power supply switching module; the commercial power supply module is used for converting commercial power into direct current and outputting the direct current to the energy storage module through the power supply switching module; the power supply switching module is used for detecting the output voltage of the solar panel, and when the output voltage of the solar panel is continuously lower than a threshold value, the solar energy power supply module supplies power to the energy storage module instead of the mains supply power supply module supplies power to the energy storage module; the beneficial effects of the utility model are that by detecting the power supply condition of the solar panel, when the power supply of the solar panel is continuously lower than a threshold value, the mains supply power supply module is automatically switched to supply power to the energy storage module through the power supply switching module; and the voltage supplied to the energy storage module is maintained.

Description

Technical Field

[0001] The utility model relates to the field of power supply, in particular to a solar energy storage power supply switching circuit. Background Art

[0002] In electric energy storage, if only relying on the mains power supply, green energy is not fully utilized. Therefore, it is common to use both solar energy and mains power supply for electric energy storage, with solar power supply being given priority. When solar power supply is insufficient, it is switched to mains power supply.

[0003] Its disadvantage is that when the solar power supply is insufficient, the voltage output to the energy storage device is already insufficient. During the power supply switching process, the insufficient voltage affects the energy storage effect and needs to be improved. Utility Model Content

[0004] The purpose of the present invention is to provide a solar energy storage power supply switching circuit to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A solar energy storage power supply switching circuit, comprising:

[0007] The solar power supply module is used to convert solar energy into electrical energy and output it to the energy storage module through the power supply switching module;

[0008] The mains power supply module is used to convert the mains power into direct current and output it to the energy storage module through the power supply switching module;

[0009] The power supply switching module is used to detect the output voltage of the solar panel. When the output voltage of the solar panel is continuously lower than the threshold, the power supply from the solar power supply module to the mains power supply module is switched;

[0010] Energy storage module, used to store electrical energy;

[0011] The solar power supply module is connected to the power supply switching module, the mains power supply module is connected to the power supply switching module, and the power supply switching module is connected to the energy storage module.

[0012] As a further solution of the present invention: the solar power supply module includes a solar panel X, a diode D1, a capacitor C1, a capacitor C2, a resistor R2, a diode D3, and a transistor V1. One end of the solar panel X is grounded, and the other end of the solar panel X is connected to the positive electrode of the diode D1 and the power supply switching module. The negative electrode of the diode D1 is connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R2, and the collector of the transistor V1. The other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the resistor R2 is connected to the negative electrode of the diode D3 and the base of the transistor V1, the positive electrode of the diode D3 is grounded, and the emitter of the transistor V1 is connected to the power supply switching module.

[0013] As a further solution of the present utility model: the mains power supply module includes a transformer W, a rectifier T, a capacitor C4, a capacitor C5, and an inductor L1. The input end of the transformer W introduces a mains voltage of 220V, one end of the output end of the transformer W is connected to the first end of the rectifier T, the other end of the output end of the transformer W is connected to the third end of the rectifier T, the fourth end of the rectifier T is grounded, the second end of the rectifier T is connected to one end of the capacitor C4 and one end of the inductor L1, the other end of the capacitor C4 is grounded, the other end of the inductor L1 is connected to one end of the capacitor C5 and the power supply switching module, and the other end of the capacitor C5 is grounded.

[0014] As a further solution of the present utility model: the power supply switching module includes a diode D2, a resistor R1, a capacitor C3, a resistor R3, a diode D6, a diode D4, a diode D5, and a MOS tube V2. The cathode of the diode D2 is connected to the solar power supply module, the anode of the diode D2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the capacitor C3 and one end of the resistor R3, the other end of the capacitor C3 is grounded, the other end of the resistor R3 is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the G pole of the MOS tube V2, the S pole of the MOS tube V2 is connected to the mains power supply module, the D pole of the MOS tube V2 is connected to the anode of the diode D5, the cathode of the diode D5 is connected to the cathode of the diode D4 and the energy storage module, and the anode of the diode D4 is connected to the solar power supply module.

[0015] As a further solution of the present invention: the energy storage module includes a battery E1, the positive electrode of the battery E1 is connected to the power supply switching module, and the negative electrode of the battery E1 is grounded.

[0016] Compared with the existing technology, the beneficial effect of the present invention is: the present invention detects the power supply status of the solar panel, and when the power supply of the solar panel continues to be lower than the threshold, it will automatically switch to the mains power supply module to power the energy storage module through the power supply switching module. During the power supply switching process, the capacitor in the solar power supply module maintains the voltage supplied to the energy storage module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of a solar energy storage power supply switching circuit.

[0018] Figure 2 This is the circuit diagram of the solar power supply module, power supply switching module and energy storage module.

[0019] Figure 3 This is the circuit diagram of the AC power supply module. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 , a solar energy storage power supply switching circuit, comprising:

[0022] The solar power supply module is used to convert solar energy into electrical energy and output it to the energy storage module through the power supply switching module;

[0023] The mains power supply module is used to convert the mains power into direct current and output it to the energy storage module through the power supply switching module;

[0024] The power supply switching module is used to detect the output voltage of the solar panel. When the output voltage of the solar panel is continuously lower than the threshold, the power supply from the solar power supply module to the mains power supply module is switched;

[0025] Energy storage module, used to store electrical energy;

[0026] The solar power supply module is connected to the power supply switching module, the mains power supply module is connected to the power supply switching module, and the power supply switching module is connected to the energy storage module.

[0027] In this example: See Figure 2 The solar power supply module includes a solar panel X, a diode D1, a capacitor C1, a capacitor C2, a resistor R2, a diode D3, and a transistor V1. One end of the solar panel X is grounded, and the other end of the solar panel X is connected to the positive electrode of the diode D1 and the power supply switching module. The negative electrode of the diode D1 is connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R2, and the collector of the transistor V1. The other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the resistor R2 is connected to the negative electrode of the diode D3 and the base of the transistor V1, the positive electrode of the diode D3 is grounded, and the emitter of the transistor V1 is connected to the power supply switching module.

[0028] Solar panel X converts solar energy into electrical energy. After passing through diode D1, the voltage is stabilized by capacitors C1 and C2. At the same time, capacitors C1 and C2 store electrical energy. Diode D3 is a voltage regulator diode, which determines the base voltage of transistor V1 and the output voltage. The stable voltage is output to the energy storage module through the power supply switching module.

[0029] In this example: See Figure 3 The AC power supply module includes a transformer W, a rectifier T, a capacitor C4, a capacitor C5, and an inductor L1. The input end of the transformer W introduces the AC power voltage of 220V. One end of the output end of the transformer W is connected to the first end of the rectifier T, the other end of the output end of the transformer W is connected to the third end of the rectifier T, the fourth end of the rectifier T is grounded, the second end of the rectifier T is connected to one end of the capacitor C4 and one end of the inductor L1, the other end of the capacitor C4 is grounded, the other end of the inductor L1 is connected to one end of the capacitor C5 and the power supply switching module, and the other end of the capacitor C5 is grounded.

[0030] The 220V AC power is stepped down by transformer W and converted into low-voltage DC power by rectifier T. The voltage is then stabilized by the constant voltage characteristics of capacitors C4 and C5 and the constant current characteristics of inductor L1. The stable DC power is output through the power supply switching module to power the energy storage module.

[0031] In this example: See Figure 2 The power supply switching module includes a diode D2, a resistor R1, a capacitor C3, a resistor R3, a diode D6, a diode D4, a diode D5, and a MOS tube V2. The cathode of the diode D2 is connected to the solar power supply module, the anode of the diode D2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the capacitor C3 and one end of the resistor R3, the other end of the capacitor C3 is grounded, the other end of the resistor R3 is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the G pole of the MOS tube V2, the S pole of the MOS tube V2 is connected to the mains power supply module, the D pole of the MOS tube V2 is connected to the anode of the diode D5, the cathode of the diode D5 is connected to the cathode of the diode D4 and the energy storage module, and the anode of the diode D4 is connected to the solar power supply module.

[0032] When the solar panel's output voltage is sufficient, it turns on diode D2, charging capacitor C3. When capacitor C3 is charged to the cutoff voltage of MOSFET V2, the solar power supply module, via the power supply switching module, supplies power to the energy storage module. When the output voltage of solar panel X is insufficient, it is insufficient to turn on diode D2, causing capacitor C3 to discharge. During this discharge process, if diode D2 turns on again, capacitor C3 will charge again. Therefore, only when the output voltage of solar panel X remains insufficient will capacitor C3 discharge excessively, causing MOSFET V2 to turn on. At this point, the AC power supply module, via the power supply switching module, supplies power to the energy storage module. Due to the presence of capacitors C1 and C2, the stored energy exceeds that of capacitor C3. Therefore, during the power supply switching process, a normal supply voltage is maintained to supply the energy storage module.

[0033] In this example: See Figure 2 The energy storage module includes a battery E1, the positive electrode of the battery E1 is connected to the power supply switching module, and the negative electrode of the battery E1 is grounded.

[0034] The battery E1 stores electrical energy.

[0035] The working principle of the utility model is as follows: the solar power supply module is used to convert solar energy into electrical energy, and output it to the energy storage module through the power supply switching module; the mains power supply module is used to convert the mains power into direct current, and output it to the energy storage module through the power supply switching module; the power supply switching module is used to detect the output voltage of the solar panel, and when the output voltage of the solar panel is continuously lower than the threshold value, the power supply for the energy storage module is switched from the solar power supply module to the mains power supply module; the energy storage module is used to store electrical energy.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A solar energy storage power supply switching circuit, characterized in that: The solar energy storage power supply switching circuit includes: The solar power supply module is used to convert solar energy into electrical energy and output it to the energy storage module through the power supply switching module; The mains power supply module is used to convert the mains power into direct current and output it to the energy storage module through the power supply switching module; The power supply switching module is used to detect the output voltage of the solar panel. When the output voltage of the solar panel is continuously lower than the threshold, the power supply from the solar power supply module to the mains power supply module is switched; Energy storage module, used to store electrical energy; The solar power supply module is connected to the power supply switching module, the mains power supply module is connected to the power supply switching module, and the power supply switching module is connected to the energy storage module.

2. The solar energy storage power supply switching circuit according to claim 1, characterized in that: The solar power supply module includes a solar panel X, a diode D1, a capacitor C1, a capacitor C2, a resistor R2, a diode D3, and a transistor V1. One end of the solar panel X is grounded, and the other end of the solar panel X is connected to the positive electrode of the diode D1 and the power supply switching module. The negative electrode of the diode D1 is connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R2, and the collector of the transistor V1. The other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the resistor R2 is connected to the negative electrode of the diode D3 and the base of the transistor V1, the positive electrode of the diode D3 is grounded, and the emitter of the transistor V1 is connected to the power supply switching module.

3. The solar energy storage power supply switching circuit according to claim 1, characterized in that: The AC power supply module includes a transformer W, a rectifier T, a capacitor C4, a capacitor C5, and an inductor L1. The input end of the transformer W introduces a 220V AC voltage, one end of the output end of the transformer W is connected to the first end of the rectifier T, the other end of the output end of the transformer W is connected to the third end of the rectifier T, the fourth end of the rectifier T is grounded, the second end of the rectifier T is connected to one end of the capacitor C4 and one end of the inductor L1, the other end of the capacitor C4 is grounded, the other end of the inductor L1 is connected to one end of the capacitor C5 and the power supply switching module, and the other end of the capacitor C5 is grounded.

4. The solar energy storage power supply switching circuit according to claim 1 or 2, characterized in that: The power supply switching module includes a diode D2, a resistor R1, a capacitor C3, a resistor R3, a diode D6, a diode D4, a diode D5, and a MOS transistor V2. The cathode of the diode D2 is connected to the solar power supply module, the anode of the diode D2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the capacitor C3 and one end of the resistor R3, the other end of the capacitor C3 is grounded, the other end of the resistor R3 is connected to the anode of the diode D6, the cathode of the diode D6 is connected to the G pole of the MOS transistor V2, the S pole of the MOS transistor V2 is connected to the mains power supply module, the D pole of the MOS transistor V2 is connected to the anode of the diode D5, the cathode of the diode D5 is connected to the cathode of the diode D4 and the energy storage module, and the anode of the diode D4 is connected to the solar power supply module.

5. The solar energy storage power supply switching circuit according to claim 1, characterized in that: The energy storage module includes a battery E1 , a positive electrode of the battery E1 is connected to the power supply switching module, and a negative electrode of the battery E1 is grounded.

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