Solar power supply system

Abstract

The utility model relates to the technical field of power supply systems, in particular to a solar power supply system which comprises a photovoltaic module, a charging management module, a storage battery module and a discharging management module which are connected in sequence, the photovoltaic module is used for converting solar energy into electric energy, the charging management module is used for managing constant-voltage charging, and the storage battery module is used for discharging electricity. The storage battery module is used for storing converted electric energy, and the discharging management module detects the voltage of the storage battery module and controls discharging. According to the utility model, the photovoltaic module converts solar energy into electric energy, the storage battery module is charged at constant voltage through the charging management module, the charging effect is prevented from being influenced by the instability of the solar energy, whether to supply power to the load is determined through the discharging management module according to the electric quantity of the storage battery module, the stability of the whole power supply system is ensured, and the practicability is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply systems, in particular to a solar power supply system. Background Art

[0002] Solar energy is an environmentally friendly energy source that can be converted into electrical energy and thermal energy for human use through photoelectric effect or photothermal effect, such as solar water heaters and photovoltaic power generation systems. It has great value in promoting the transformation of energy structure, reducing environmental pollution and achieving sustainable development.

[0003] The energy output of solar energy mainly depends on the intensity of solar radiation, which is closely related to geographical location, seasonal changes, weather conditions, duration of sunshine and daytime hours. At noon when the sun is abundant, the solar energy conversion efficiency is usually higher. In the morning and evening or on cloudy days, due to the weakening of solar radiation intensity, the amount of solar energy obtained will drop significantly, resulting in volatility and instability in energy output. Therefore, a power supply system that can stabilize solar energy output is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a solar power supply system to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A solar power supply system comprises a photovoltaic module, a charging management module, a battery module and a discharge management module connected in sequence, wherein the photovoltaic module is used to convert solar energy into electrical energy, the charging management module is used to manage constant voltage charging, the battery module is used to store the electrical energy converted by the photovoltaic module, and the discharge management module is used to detect the voltage of the battery module and control discharge.

[0007] Preferably, the photovoltaic module uses a plurality of solar panels, and the battery module uses a plurality of batteries.

[0008] Preferably, the charging management module includes a ZS6075 chip, a first capacitor C1, a first resistor R1, a first indicator light L1, a second indicator light L2, a first potentiometer RL1, a second capacitor C2 and a second resistor R2;

[0009] The first end of the first capacitor C1 is connected to the output end of the photovoltaic module, the second end of the first capacitor C1 is grounded, the first end of the first resistor R1 is connected to the first end of the first capacitor C1, the first end of the first indicator light L1 is connected to the second end of the first resistor R1, the second end of the first indicator light L1 is connected to the 6th pin of the ZS6075 chip, the first end of the second indicator light L2 is connected to the second end of the first resistor R1, the second end of the second indicator light L2 is connected to the 7th pin of the ZS6075 chip, the 4th pin of the ZS6075 chip is connected to the first end of the first resistor R1, the 3rd pin of the ZS6075 chip is grounded, and the second end of the second indicator light L2 is connected to the 6th pin of the ZS6075 chip. The first end of capacitor C2 is connected to pin 5 of ZS6075 chip, the second end of the second capacitor C2 is connected to pin 1 of ZS6075 chip, the second end of the second capacitor C2 is grounded, pin 2 of ZS6075 chip is connected to the first end of the second resistor R2, the second end of the second resistor R2 is grounded, the first end of the first potentiometer RL1 is connected to pin 8 of ZS6075 chip, the second end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, the movable end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, and the two input ends of the battery module are respectively connected to the two ends of the second capacitor C2.

[0010] Preferably, the discharge management module includes a power supply VCC, a third resistor R3, a fourth resistor R4, a CN301 chip, a third capacitor C3, a fourth capacitor C4, a second potentiometer RL2, a fifth resistor R5, a LM317 chip and an NMOS tube;

[0011] The power supply VCC is 1.9V to 6V, the first end of the third resistor R3 is connected to the output end of the battery module, the second end of the third resistor R3 is connected to the LBI pin of the CN301 chip, the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, the second end of the fourth resistor R4 is grounded, the VCC pin of the CN301 chip is connected to the power supply VCC, the GND pin of the CN301 chip is grounded, the VIN pin of the LM317 chip is connected to the first end of the third resistor R3, the first end of the third capacitor C3 is grounded, the second end of the third capacitor C3 is connected to the VIN pin of the LM317 chip, and the first end of the second potentiometer RL2 ... power supply VCC, the GND pin of the CN301 chip is grounded, the VIN pin of the LM317 chip is connected to the power supply VCC, the GND pin of the CN301 chip is grounded, the VIN pin of the LM3 The first end of the fifth resistor R5 is connected to the ADJ pin of the LM317 chip, the second end of the fifth resistor R5 is connected to the VOUT pin of the LM317 chip, the first end of the fourth capacitor C4 is connected to the ground, the second end of the fourth capacitor C4 is connected to the VOUT pin of the LM317 chip, the gate of the NMOS tube is connected to the LBO pin of the CN301 chip, the source of the NMOS tube is grounded, and the load is connected between the VOUT pin of the LM317 chip and the drain of the NMOS tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model converts solar energy into electrical energy by setting up a photovoltaic module, and then charges the battery module at a constant voltage through a charging management module to avoid the charging effect being affected by the instability of solar energy. The discharge management module then decides whether to supply power to the load according to the power of the battery module, thereby ensuring the stability of the entire power supply system and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a circuit diagram of the charging management module in the utility model;

[0016] Figure 3 It is a circuit diagram of the discharge management module in the utility model.

[0017] In the figure:

[0018] 1. Photovoltaic modules;

[0019] 2. Charging management module;

[0020] 3. Battery module;

[0021] 4. Discharge management module. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0024] A solar power supply system comprises a photovoltaic module 1, a charging management module 2, a battery module 3 and a discharge management module 4 which are connected in sequence. The photovoltaic module 1 is used to convert solar energy into electrical energy. The charging management module 2 is used to manage constant voltage charging to prevent the charging effect from being affected by the instability of solar energy. The battery module 3 is used to store the electrical energy converted by the photovoltaic module 1 and fully store and utilize the solar energy. The discharge management module 4 is used to detect the voltage of the battery module 3 and control the discharge to ensure stable operation of the load, which is more practical.

[0025] In this embodiment, the photovoltaic module 1 uses multiple solar panels, and the battery module 3 uses multiple batteries. The specific connection method needs to be adjusted according to actual needs. Series connection increases the voltage, but the current remains unchanged. Parallel connection increases the current, but the voltage does not increase. However, parallel connection requires the batteries to have the same specifications.

[0026] Specifically, the charging management module 2 includes a ZS6075 chip, a first capacitor C1, a first resistor R1, a first indicator light L1, a second indicator light L2, a first potentiometer RL1, a second capacitor C2, and a second resistor R2;

[0027] The first end of the first capacitor C1 is connected to the output end of the photovoltaic module 1, the second end of the first capacitor C1 is grounded, the first end of the first resistor R1 is connected to the first end of the first capacitor C1, the first end of the first indicator light L1 is connected to the second end of the first resistor R1, the second end of the first indicator light L1 is connected to the 6th pin of the ZS6075 chip, the first end of the second indicator light L2 is connected to the second end of the first resistor R1, the second end of the second indicator light L2 is connected to the 7th pin of the ZS6075 chip, the 4th pin of the ZS6075 chip is connected to the first end of the first resistor R1, the 3rd pin of the ZS6075 chip is grounded, the first end of the second capacitor C2 is connected to the 5th pin of the ZS6075 chip, the second end of the second capacitor C2 is connected to the 1st pin of the ZS6075 chip, the second end of the second capacitor C2 is grounded, the 2nd pin of the ZS6075 chip is connected to the first end of the second resistor R2, the second end of the second resistor R2 is grounded, the first end of the first potentiometer RL1 is connected to the 8th pin of the ZS6075 chip, the second end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, The active end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, and the two input ends of the battery module 3 are connected to the two ends of the second capacitor C2 respectively; the output voltage of the photovoltaic module 1 is 4.4V to 6V, and the ZS6075 chip is a battery charging management chip that can automatically adjust the charging current. The chip is equipped with a power transistor inside, and does not require an external current detection resistor and a blocking diode. It is also equipped with an 8-bit analog-to-digital conversion circuit, which can automatically adjust the charging current according to the current output capacity of the input voltage source, thereby maximizing the current output capacity of the input voltage source. It is very suitable for battery charging applications powered by voltage sources with limited current output capacity such as solar panels, and the chip has fewer peripheral components and complies with the USB bus technical specifications, so it is very suitable for portable applications. In addition, the chip is equipped with a constant voltage charging voltage, and the charging current can be adjusted through the first potentiometer RL1. When the input voltage is powered off, the ZS6075 will automatically enter a low-power sleep mode.

[0028] Further, the discharge management module 4 includes a power supply VCC, a third resistor R3, a fourth resistor R4, a CN301 chip, a third capacitor C3, a fourth capacitor C4, a second potentiometer RL2, a fifth resistor R5, a LM317 chip and an NMOS tube;

[0029] The power supply VCC has a value of 1.9V to 6V. The first end of the third resistor R3 is connected to the output end of the battery module 3. The second end of the third resistor R3 is connected to the LBI pin of the CN301 chip. The first end of the fourth resistor R4 is connected to the second end of the third resistor R3. The second end of the fourth resistor R4 is grounded. The VCC pin of the CN301 chip is connected to the power supply VCC. The GND pin of the CN301 chip is grounded. The VIN pin of the LM317 chip is connected to the first end of the third resistor R3. The first end of the third capacitor C3 is grounded. The second end of the third capacitor C3 is connected to the VIN pin of the LM317 chip. The first end of the second potentiometer RL2 is grounded. The second end of the second potentiometer RL2 is connected to the ADJ pin of the LM317 chip. The active end of the second potentiometer RL2 is connected to the ADJ pin of the LM317 chip. The first end of the fifth resistor R5 is connected to the LM317 chip. ADJ pin, the second end of the fifth resistor R5 is connected to the VOUT pin of the LM317 chip, the first end of the fourth capacitor C4 is grounded, the second end of the fourth capacitor C4 is connected to the VOUT pin of the LM317 chip, the gate of the NMOS tube is connected to the LBO pin of the CN301 chip, the source of the NMOS tube is grounded, and the load is connected between the VOUT pin of the LM317 chip and the drain of the NMOS tube; the CN301 chip is a battery detection integrated circuit. When the voltage of the battery module 3 is lower than the set downlink threshold, the CN301 chip outputs a low level. When the battery voltage is greater than the uplink threshold, the CN301 chip outputs a high level, thereby controlling the on and off of the NMOS tube, and stabilizing the output voltage of the battery module 3 through the LM317 chip to maintain stable operation of the load. A boost module or a buck module can also be added according to needs.

[0030] When the solar power supply system of the utility model is in use, the photovoltaic module 1 converts solar energy into electrical energy, and then the charging management module 2 provides constant voltage charging to avoid charging being affected by the instability of solar energy. Then the battery module 3 supplies power to the load through the discharge management module 4. The discharge management module 4 includes a CN301 chip for detection and an LM317 chip for voltage stabilization, which can make the load run stably and is more practical.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A solar power supply system, comprising a photovoltaic module (1), a charging management module (2), a battery module (3) and a discharging management module (4) connected in sequence, characterized in that: The photovoltaic module (1) is used to convert solar energy into electrical energy, the charging management module (2) is used to manage constant voltage charging, the battery module (3) is used to store the electrical energy converted by the photovoltaic module (1), and the discharge management module (4) is used to detect the voltage of the battery module (3) and control discharge; The photovoltaic module (1) uses a plurality of solar panels, and the battery module (3) uses a plurality of batteries; The charging management module (2) comprises a ZS6075 chip, a first capacitor C1, a first resistor R1, a first indicator light L1, a second indicator light L2, a first potentiometer RL1, a second capacitor C2 and a second resistor R2; The first end of the first capacitor C1 is connected to the output end of the photovoltaic module (1), the second end of the first capacitor C1 is grounded, the first end of the first resistor R1 is connected to the first end of the first capacitor C1, the first end of the first indicator light L1 is connected to the second end of the first resistor R1, the second end of the first indicator light L1 is connected to pin 6 of the ZS6075 chip, the first end of the second indicator light L2 is connected to the second end of the first resistor R1, the second end of the second indicator light L2 is connected to pin 7 of the ZS6075 chip, pin 4 of the ZS6075 chip is connected to the first end of the first resistor R1, pin 3 of the ZS6075 chip is grounded, and the second end of the first resistor R1 is connected to the first end of the first capacitor C1. The first end of capacitor C2 is connected to pin 5 of the ZS6075 chip, the second end of the second capacitor C2 is connected to pin 1 of the ZS6075 chip, the second end of the second capacitor C2 is grounded, pin 2 of the ZS6075 chip is connected to the first end of the second resistor R2, the second end of the second resistor R2 is grounded, the first end of the first potentiometer RL1 is connected to pin 8 of the ZS6075 chip, the second end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, the movable end of the first potentiometer RL1 is connected to the first end of the second capacitor C2, and the two input ends of the battery module (3) are respectively connected to the two ends of the second capacitor C2; The discharge management module (4) comprises a power supply VCC, a third resistor R3, a fourth resistor R4, a CN301 chip, a third capacitor C3, a fourth capacitor C4, a second potentiometer RL2, a fifth resistor R5, a LM317 chip and an NMOS tube; The power supply VCC has a value of 1.9V to 6V, a first end of the third resistor R3 is connected to the output end of the battery module (3), a second end of the third resistor R3 is connected to the LBI pin of the CN301 chip, a first end of the fourth resistor R4 is connected to the second end of the third resistor R3, a second end of the fourth resistor R4 is grounded, a VCC pin of the CN301 chip is connected to the power supply VCC, a GND pin of the CN301 chip is grounded, a VIN pin of the LM317 chip is connected to the first end of the third resistor R3, a first end of the third capacitor C3 is grounded, a second end of the third capacitor C3 is connected to the VIN pin of the LM317 chip, and a second potentiometer RL2 is connected to the VCC pin of the CN301 chip. The first end is grounded, the second end of the second potentiometer RL2 is connected to the ADJ pin of the LM317 chip, the active end of the second potentiometer RL2 is connected to the ADJ pin of the LM317 chip, the first end of the fifth resistor R5 is connected to the ADJ pin of the LM317 chip, the second end of the fifth resistor R5 is connected to the VOUT pin of the LM317 chip, the first end of the fourth capacitor C4 is grounded, the second end of the fourth capacitor C4 is connected to the VOUT pin of the LM317 chip, the gate of the NMOS tube is connected to the LBO pin of the CN301 chip, the source of the NMOS tube is grounded, and the load is connected between the VOUT pin of the LM317 chip and the drain of the NMOS tube.

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