CN214627438U

CN214627438U - Photovoltaic lithium battery and mains supply complementary lighting system

Info

Publication number: CN214627438U
Application number: CN202023020851.2U
Authority: CN
Inventors: 王开; 钱伟; 汤飞; 孙妮; 杨珊珊
Original assignee: Wuxi Yongjing Photoelectric Technology Co ltd
Current assignee: Wuxi Yongjing Photoelectric Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-11-05
Anticipated expiration: 2030-12-15

Abstract

The utility model provides a complementary lighting system of photovoltaic lithium electricity commercial power, including photovoltaic board W0, lithium cell W1, DC power supply W2, LED illumination L0, MCU microprocessor U1, low dropout linear regulator U2, low dropout linear constant current driver U3-U8, parallelly connected in the circuit between low dropout linear constant current driver U3-U8; the photovoltaic panel W0, the lithium battery W1 and the direct current power supply W2 are connected in parallel in a circuit and are respectively connected with a VCC pin of the MCU microprocessor U1 through a low dropout linear regulator U2. The utility model provides a lighting system, when the electricity of no illumination lithium cell also exhausts simultaneously, can start DC power supply for the power supply of LED light to can lead to solar energy power supply system can't the during operation provide the illumination in the overcast and rainy day in succession.

Description

Photovoltaic lithium battery and mains supply complementary lighting system

Technical Field

The utility model relates to the field of lighting technology, specific theory relates to a complementary lighting system of photovoltaic lithium electricity commercial power.

Background

The existing solar lighting system usually adopts an independent power supply mode, and when the existing solar lighting system is continuously in a rainy day, the photovoltaic is exhausted, so that the lighting system is in a paralyzed state. Therefore, it is necessary to design a lighting system capable of being connected with the mains supply, so that the mains supply can be automatically started when the lighting system encounters a continuous rainy day, and power failure is avoided.

SUMMERY OF THE UTILITY MODEL

In view of the technical problem stated above, the embodiment of the utility model provides a complementary lighting system of photovoltaic lithium electricity commercial power solves the technical problem that current solar energy lighting system is in.

A photovoltaic lithium battery and mains supply complementary lighting system comprises a photovoltaic panel W0, a lithium battery W1, a direct current power supply W2, an LED lighting L0, an MCU microprocessor U1, a low-voltage-difference linear voltage stabilizer U2 and low-voltage-difference linear constant current drivers U3-U8, wherein the low-voltage-difference linear constant current drivers U3-U8 are connected in parallel in a circuit; the photovoltaic panel W0, the lithium battery W1 and the direct-current power supply W2 are connected in parallel in a circuit and are respectively connected with a VCC (voltage converter) pin of the MCU microprocessor U1 through a low dropout linear regulator U2;

the lithium battery W1 supplies power for the low-voltage-difference linear constant-current driver U3-U8 through a PNP triode Q3; the NPN triode Q1 is connected with the grid of the M1; the NPN triode Q2 is connected with the grid of the M2; an NPN triode Q4 is connected with the gates of M3 and M4; the base electrode of the NPN triode Q5 is connected with the base electrode of the Q3;

the anode of the LED lighting L0 is connected with a direct current power supply W2 through a control switch M2, connected with a photovoltaic panel W0 through a control switch M2, connected with a lithium battery W1 through M1, and connected with an NC pin of an MCU microprocessor U1 through a control switch M1, wherein M1, M2, M3 and M4 are all P-channel field effect transistors;

the photovoltaic panel W0 is connected with a low dropout regulator U2 through a Schottky diode D5; the lithium battery W1 is connected with the low dropout linear regulator U2 through a Schottky diode D4; the dc power supply W2 is connected to the low dropout regulator U2 via a schottky diode D3.

The voltage stabilizing diode DZ1 is connected with the power supply port of the low dropout linear constant current driver U3-U8 for controlling the voltage of the power supply port.

The transient suppression diode TVS1 is connected in parallel with the dc power supply.

The light emitting diode GL1 is connected to the PWM3 pin of the MCU microprocessor U1, and the light emitting diode RL1 is connected to the Test pin of the MCU microprocessor U1.

The device also comprises an infrared receiving head IR1 which is connected between the photovoltaic panel W0 and the MCU microprocessor U1 and is used for sensing infrared signals.

The model of a chip used by the MCU microprocessor U1 is FT61F022A, the model of a chip of a low dropout linear regulator U2 is MD8250A, and the model of a low dropout linear constant current driver U3-U8 is NK 7202C.

The utility model provides a lighting system, when the electricity of no illumination lithium cell also exhausts simultaneously, can start DC power supply for the power supply of LED light to can lead to solar energy power supply system can't the during operation provide the illumination in the overcast and rainy day in succession.

Drawings

The invention may be better understood from the following description of particular embodiments thereof taken in conjunction with the accompanying drawings, in which:

other features, objects and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like or similar reference characters identify the same or similar features.

Fig. 1 is a circuit diagram of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but covers any modification, replacement or improvement of elements, components and algorithms without departing from the spirit of the present invention. In the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

Example embodiments will now be described with reference to the accompanying drawings, which may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

As shown in fig. 1, an embodiment of the present invention provides a photovoltaic lithium battery and commercial power complementary lighting system, which includes a photovoltaic panel W0, a lithium battery W1, a dc power supply W2, an LED lighting L0, an MCU microprocessor U1, a low dropout linear regulator U2, a low dropout linear constant current driver U3-U8, and low dropout linear constant current drivers U3-U8 connected in parallel in a circuit; the photovoltaic panel W0, the lithium battery W1 and the direct-current power supply W2 are connected in parallel in a circuit and are respectively connected with a VCC (voltage converter) pin of the MCU microprocessor U1 through a low dropout linear regulator U2;

The infrared receiving head IR1 is connected between the photovoltaic panel W0 and the MCU microprocessor U1 and is used for sensing infrared signals.

The working principle of the utility model is as follows:

u1 is MCU microprocessor, model is FT61F022A, controls whole circuit through burning the software program that accords with practical application. U2 is low dropout regulator, and model is MD8250A, provides stable power supply voltage for MCU. U3-U8 is NK 7202C.

D1 and D2 are Schottky diodes capable of passing large current, so that the charging of the battery by the switch voltage-stabilized power supply and the reverse discharging of the battery to the switch voltage-stabilized power supply are prevented. D3, D4, D5 are Schottky diodes, and when the photovoltaic board, the battery, the switching regulated power supply were the power supply of core MCU simultaneously, avoid the disorderly trend of electric current. M1, M2, M3 and M4 are P-channel field effect transistors, M1 controls the switch of the battery for discharging the LED light source board, and M2 controls the switch of the switch voltage-stabilizing power supply for supplying power to the LED light source board. The M3 and M4 play a role in controlling the on-off charging state, adjusting the charging current and preventing reverse leakage in the process of charging the battery by the photovoltaic panel.

The Q1 is an NPN triode which controls the grid of the M1, thereby controlling the conducting state of the M1; the Q2 is an NPN transistor that controls the gate of M2, thereby controlling the on state of M2. Q3 is PNP triode, and the power supply of control battery to constant current drive IC (NK 7202C). The Q4 is an NPN triode and controls the conduction states of the M3 and the M4. The Q5 is an NPN triode and controls the conducting state of the Q3.

DZ1 is a zener diode that limits the voltage at the NK7202C power supply port. The TVS1 is a transient suppression diode, and prevents voltage fluctuation of the switching regulator power supply caused by load change from damaging devices at the rear stage of the circuit. GL1 is a green indicator light for indicating the current charge and discharge state. RL1 is a red indicator light indicating the current battery voltage status. The LED part is the access end of the LED light source plate.

R1 and R2 measure the voltage across the photovoltaic panel, R5 and R8 measure the voltage across the battery, and R14 and R16 measure the voltage at the input of the switching regulator. The MCU judges the ambient light illumination at the moment according to the voltage of the photovoltaic panel, if the voltage is gradually reduced, the ambient light is weak, the LED light source panel is about to enter night, when the detected voltage reaches a certain value, the MCU gives a signal for turning on the LED light source panel, therefore, Q1 is conducted, M1 is conducted, the battery supplies power to the LED light source panel, Q5 is conducted, Q3 is conducted, NK7202C starts to work, R13 and R15 filter into direct current voltage signals through PWM signals output by the MCU, reference voltage is provided for NK7202C, the value of the direct current voltage signals is changed by adjusting the output duty ratio of the PWM, and therefore the output current of NK7202C is changed. At this moment, the output power of the LED light source plate can be judged according to the time progress, when people are rare at later night, the output power can be automatically reduced, the electric quantity of the battery can be judged according to the voltage of the battery, and the output power can be automatically changed. When the voltage of the battery is lower than a certain value, the red indicator lamp begins to flicker, the MCU judges that the battery is in a power shortage state, the battery can be automatically switched to be output by the switch voltage-stabilized power supply, at the moment, Q1 is closed, M1 is closed, Q2 is opened, M2 is opened, the switch voltage-stabilized power supply supplies power for the LED light source board, and the battery enters a mains supply state. When the MCU detects that the voltage at two ends of the photovoltaic panel gradually rises, the photovoltaic panel is about to enter the daytime, when the voltage rises to a certain value, the MCU gives a signal for turning off the LED light source panel, Q5 is turned off, Q3 is turned off, the power supply of NK7202C is cut off, if the power supply is supplied to a battery at the moment, Q1 is turned off, and M1 is turned off; when power is supplied to the switching power supply at this time, Q2 is turned off, and M2 is turned off. When the voltage of the photovoltaic panel is greater than the voltage of the battery, the MCU judges that the charging state of the photovoltaic panel to the battery can be entered at the moment, Q4 is turned on, M3 and M4 start to be conducted, the photovoltaic panel charges the battery, and the green indicator light starts to flicker; when the MCU detects that the battery voltage reaches a certain value, the battery is judged to enter a charging saturation state, Q4 is turned off, M3 and M4 are turned off, the photovoltaic panel stops charging the battery, and the green indicator lamp is normally on; when the charging is stopped and the voltage of the battery is lower than a certain value, the charging is started again, and the charging is circulated in sequence until the ambient light weakens and the LED light source board is started.

It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the specification and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order.

Claims

1. The photovoltaic lithium battery and mains supply complementary lighting system is characterized by comprising a photovoltaic panel W0, a lithium battery W1, a direct-current power supply W2, an LED lighting L0, an MCU microprocessor U1, a low-voltage-difference linear voltage stabilizer U2, low-voltage-difference linear constant-current drivers U3-U8, wherein the low-voltage-difference linear constant-current drivers U3-U8 are connected in parallel in a circuit; the photovoltaic panel W0, the lithium battery W1 and the direct-current power supply W2 are connected in parallel in a circuit and are respectively connected with a VCC (voltage converter) pin of the MCU microprocessor U1 through a low dropout linear regulator U2;

2. The photovoltaic lithium battery complementary lighting system of claim 1,

3. The photovoltaic lithium battery complementary lighting system of claim 1,

4. The photovoltaic lithium battery complementary lighting system of claim 1,

5. The photovoltaic lithium battery complementary lighting system of claim 1,