System and method for improving efficiency and service life of solar lamp based on dual-power management

Abstract

The invention discloses a system for improving the efficiency and prolonging the service life of a solar lamp based on dual-power management. The system comprises a solar cell panel, a lithium iron phosphate battery, a ternary lithium battery, a DC-DC boosting module, an LED driving module, a temperature monitoring module, a power supply switching module, a voltage acquisition module and a controller. The invention further discloses an implementation method of the system for improving the efficiency and the service life of the solar lamp based on dual-power management, the environment temperature is monitored in real time through the temperature monitoring module, and based on the characteristics of good stability of the lithium iron phosphate battery in a high-temperature environment and high discharge efficiency of the ternary lithium battery in a low-temperature condition, the system can improve the efficiency of the solar lamp and prolong the service life of the solar lamp. And the charging and discharging strategies of the lithium iron phosphate battery and the ternary lithium battery are dynamically adjusted to ensure that optimal energy conversion and storage efficiency can be realized at different environment temperatures, so that the service life of the solar lamp is prolonged, and the utilization efficiency of overall energy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar lamp charging management, and particularly relates to a system and method for improving the efficiency and lifespan of solar lamps based on dual power management. Background Art

[0002] Currently, the charging and discharging methods of solar lamps on the market mainly manage the different states of a single battery during the day and night.

[0003] In the actual application process, there are some deficiencies, such as:

[0004] 1. The ternary lithium battery is not resistant to high temperatures;

[0005] 2. The lithium iron phosphate battery is not resistant to low temperatures;

[0006] 3. The service life of a single battery is low.

[0007] Therefore, there is an urgent need for a system and method for improving the efficiency and lifespan of solar lamps based on dual power management to improve the efficiency and lifespan of solar lamps. Summary of the Invention

[0008] The purpose of the present invention is to provide a system for improving the efficiency and lifespan of solar lamps based on dual power management to solve the problems raised in the above background art. A system for improving the efficiency and lifespan of solar lamps based on dual power management provided by the present invention has the characteristics of being able to improve the efficiency and lifespan of solar lamps.

[0009] Another purpose of the present invention is to provide a method for implementing a system for improving the efficiency and lifespan of solar lamps based on dual power management.

[0010] To achieve the above purpose, the present invention provides the following technical solution: A system for improving the efficiency and lifespan of solar lamps based on dual power management includes a solar panel, a lithium iron phosphate battery, a ternary lithium battery, a DC-DC boost module, an LED driver module, a temperature monitoring module, a power supply switching module, a voltage acquisition module, and a controller. Among them, the solar panel is used to convert light energy into electrical energy to charge the lithium iron phosphate battery; the lithium iron phosphate battery is used to store electrical energy, supply power to the solar lamp or charge the ternary lithium battery; the ternary lithium battery is used to store electrical energy and supply power to the solar lamp; the DC-DC boost module is used to boost the output voltage of the lithium iron phosphate battery to charge the ternary lithium battery; the LED driver module is used to control the lighting and extinguishing of the solar lamp; the temperature monitoring module is used to monitor the ambient temperature in real time and transmit the temperature information to the controller; the power supply switching module connects the corresponding circuit based on the control signal output by the controller; the voltage acquisition module is used to acquire the voltages at the output ends of the solar panel, the lithium iron phosphate battery, and the ternary lithium battery; the controller includes a control chip U2 for receiving, processing, and outputting signals.

[0011] Further in the present invention, a linear voltage regulator module is further included. The input end of the linear voltage regulator module is connected to the positive terminal of the lithium iron phosphate battery, and the output end of the linear voltage regulator module is respectively connected to the controller and the temperature monitoring module.

[0012] Further in the present invention, the power supply switching circuit includes a ternary lithium battery switching circuit and a lithium iron phosphate battery switching circuit. Among them, the ternary lithium battery switching circuit includes MOS transistors Q1 and Q2. The gate of MOS transistor Q2 is respectively connected to one end of resistor R10 and resistor R11. The other end of resistor R10 is connected to pin 5 of control chip U2. The source of MOS transistor Q2 is connected to one end of resistor R12. The other ends of resistor R11 and resistor R12 are both connected to the GND terminal. The drain of MOS transistor Q2 is connected to the gate of MOS transistor Q1 and one end of resistor R9. The other end of resistor R9 and the source of MOS transistor Q1 are both connected to the positive terminal of the ternary lithium battery. The drain of MOS transistor Q2 is connected to the positive terminal of the solar lamp. The lithium iron phosphate battery switching circuit includes MOS transistors Q3 and Q4. The gate of MOS transistor Q4 is respectively connected to one end of resistor R14 and resistor R15. The other end of resistor R14 is connected to pin 3 of control chip U2. The source of MOS transistor Q4 is connected to one end of resistor R16. The other ends of resistor R15 and resistor R16 are both connected to the GND terminal. The drain of MOS transistor Q4 is connected to the gate of MOS transistor Q3 and one end of resistor R13. The other end of resistor R13 and the source of MOS transistor Q3 are both connected to the positive terminal of the lithium iron phosphate battery. The drain of MOS transistor Q3 is connected to the positive terminal of the solar lamp.

[0013] Further in the present invention, the temperature monitoring module includes a thermistor R3. Among them, one end of the thermistor R3 is connected to the output end of the linear voltage regulator module, and the other end of the thermistor R3 is respectively connected to resistor R8 and pin 12 of control chip U2. The other end of resistor R8 is connected to the GND terminal.

[0014] Further in the present invention, the voltage acquisition module includes a solar panel acquisition circuit, a lithium iron phosphate battery acquisition circuit, and a ternary lithium battery acquisition circuit. Among them, the solar panel acquisition circuit includes resistor R1 and resistor R5. One end of resistor R1 is connected to resistor R5 and pin 17 of control chip U2 respectively. The other end of resistor R1 is connected to the positive terminal of the solar panel. The other end of resistor R5 is connected to the GND terminal. The lithium iron phosphate battery acquisition circuit includes resistor R2 and resistor R6. One end of resistor R2 is connected to resistor R6 and pin 20 of control chip U2 respectively. The other end of resistor R2 is connected to the positive terminal of the lithium iron phosphate battery. The other end of resistor R6 is connected to the GND terminal. The ternary lithium battery acquisition circuit includes resistor R17 and resistor R18. One end of resistor R17 is connected to resistor R18 and pin 19 of control chip U2 respectively. The other end of resistor R17 is connected to the positive terminal of the ternary lithium battery. The other end of resistor R18 is connected to the GND terminal.

[0015] Further in the present invention, the positive terminal of the solar panel is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the positive terminal of the lithium iron phosphate battery.

[0016] Further in the present invention, the LED driving module includes MOS transistor Q5. The gate of MOS transistor Q5 is connected to one end of resistor R4 and resistor R7 respectively. The other end of resistor R4 is connected to pin 16 of control chip U2. The other end of resistor R7 and the source of MOS transistor Q5 are connected to the GND terminal. The drain of MOS transistor Q5 is connected to the negative terminal of the solar lamp.

[0017] Further in the present invention, the DC-DC boost module includes chip U1. Pin 5 of chip U1 is connected to one end of inductor L1. The other end of inductor L1 is connected to the positive terminal of the lithium iron phosphate battery and one end of capacitor C1 respectively. Pin 2 of chip U1 is connected to the positive terminal of the ternary lithium battery and one end of capacitor C2 respectively. The other ends of capacitor C1 and capacitor C2 and pin 4 of chip U1 are all connected to the GND terminal. Pin 1 of chip U1 is connected to pin 11 of control chip U2.

[0018] Further in the present invention, the system for improving the efficiency and lifespan of a solar lamp based on dual power management includes the following steps:

[0019] S1. In sufficient light, the solar panel converts light energy into electrical energy to charge the lithium iron phosphate battery.

[0020] S2. The temperature monitoring module continuously acquires the ambient temperature and transmits the temperature value to the controller. The controller determines whether the current temperature is higher or lower than the set temperature threshold, determines whether the current period is day or night, and determines the power level of the lithium iron phosphate battery.

[0021] S3. If the temperature is lower than the set temperature threshold, and it is daytime and the power of the lithium iron phosphate battery is higher than the set value, the controller sends an enabling signal to the DC-DC boost module to boost the output voltage of the lithium iron phosphate battery to 5V to charge the ternary lithium battery;

[0022] S4. If the temperature is lower than the set temperature threshold and it is night, then judge whether the power of the ternary lithium battery is higher than the set value. If it is higher than the set value, turn on the ternary lithium battery switch circuit to supply power to the solar lamp, and output a PWM signal to the LED drive module to light up the solar lamp. If it is lower than the set value, turn on the lithium iron phosphate battery switch circuit, and the lithium iron phosphate battery supplies power to the solar lamp;

[0023] S5. If the temperature is higher than the set temperature threshold and it is daytime, no action is taken;

[0024] S6. If the temperature is higher than the set temperature threshold and it is night, turn on the lithium iron phosphate switch circuit to supply power to the solar lamp, and output a PWM signal to the LED drive module to light up the solar lamp.

[0025] Further in the present invention, in step S2, the controller calculates the average temperature of the previous five days, and then takes the average value of the average temperature of the previous five days as the set temperature threshold T. The calculation formula is:

[0026]

[0027] where t n represents the average temperature value of the previous day.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The present invention uses the temperature monitoring module to monitor the ambient temperature in real time. Based on the good stability of the lithium iron phosphate battery in a high-temperature environment and the high discharge efficiency of the ternary lithium battery under low-temperature conditions, the charge and discharge strategies of the lithium iron phosphate battery and the ternary lithium battery are dynamically adjusted to ensure optimal energy conversion and storage efficiency under different ambient temperatures, thereby prolonging the service life of the solar lamp and improving the overall energy utilization efficiency;

[0030] 2. In the present invention, the ternary lithium battery switch circuit and the lithium iron phosphate battery switch circuit are respectively implemented by an N-channel MOS transistor with a P-channel MOS transistor to solve the problem that the GS terminal voltage difference of a single MOS transistor is too small, resulting in incomplete cutoff of the MOS transistor;

[0031] 3. The present invention uses the temperature monitoring module to monitor the temperature value of the current environment in real time, providing accurate temperature sensing for the controller, thereby achieving optimal energy conversion and storage efficiency;

[0032] 4. The present invention uses resistors R1 and R5 as sampling resistors at the output end of the solar panel to collect the output voltage of the solar panel, thereby realizing the judgment of day or night.

[0033] 5. The present invention uses resistors R2 and R6 as sampling resistors at the output end of the lithium iron phosphate battery to collect the output voltage of the lithium iron phosphate battery, thereby judging the power of the lithium iron phosphate battery and deciding whether to charge the ternary lithium battery.

[0034] 6. The present invention uses resistors R17 and R18 as sampling resistors at the output end of the ternary lithium battery to collect the output voltage of the ternary lithium battery, thereby judging the power of the ternary lithium battery and deciding whether to supply power to the solar lamp by the ternary lithium battery, avoiding the problem that effective lighting cannot be carried out due to insufficient power of the ternary lithium battery. When the night temperature is lower than the set temperature threshold and the power of the ternary lithium battery is insufficient, the lithium iron phosphate battery supplies power to the solar lamp.

[0035] 7. The present invention uses the average value of the average temperature in the previous five days as the set temperature threshold, making the set temperature threshold more in line with the current environment and capable of changing with the change of seasons, thereby ensuring the optimal energy conversion and storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is the system block diagram of the present invention;

[0037] Figure 2 It is the circuit diagram of the linear voltage regulator module of the present invention;

[0038] Figure 3 It is the circuit diagram of the ternary lithium battery switch circuit of the present invention;

[0039] Figure 4 It is the circuit diagram of the lithium iron phosphate battery switch circuit of the present invention;

[0040] Figure 5 It is the circuit diagram of the temperature monitoring module of the present invention;

[0041] Figure 6 It is the circuit diagram of the solar panel collection circuit and the lithium iron phosphate battery collection circuit of the present invention;

[0042] Figure 7 It is the circuit diagram of the ternary lithium battery collection circuit of the present invention;

[0043] Figure 8 It is the circuit diagram of the LED driving module of the present invention;

[0044] Figure 9 It is the circuit diagram of the DC-DC boost module of the present invention;

[0045] Figure 10 This is the circuit diagram of the control chip U2 of the present invention. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment 1

[0048] Please refer to Figures 1 - 10 , the present invention provides the following technical solutions: A system for improving the efficiency and lifespan of a solar lamp based on dual power management, including a solar panel, a lithium iron phosphate battery, a ternary lithium battery, a DC-DC boost module, an LED driver module, a temperature monitoring module, a power supply switching module, a voltage acquisition module, and a controller. Among them, the solar panel is used to convert light energy into electrical energy to charge the lithium iron phosphate battery; the lithium iron phosphate battery is used to store electrical energy, supply power to the solar lamp, or charge the ternary lithium battery; the ternary lithium battery is used to store electrical energy and supply power to the solar lamp; the DC-DC boost module is used to boost the output voltage of the lithium iron phosphate battery to charge the ternary lithium battery; the LED driver module is used to control the lighting and extinguishing of the solar lamp; the temperature monitoring module is used to monitor the ambient temperature in real time and transmit the temperature information to the controller; the power supply switching module connects the corresponding circuit based on the control signal output by the controller; the voltage acquisition module is used to acquire the voltages at the output ends of the solar panel, the lithium iron phosphate battery, and the ternary lithium battery; the controller includes a control chip U2, and the model of the control chip U2 is HC89F0332, which is used for signal reception, processing, and output.

[0049] By adopting the above technical solutions, the present invention monitors the ambient temperature in real time through the temperature monitoring module. Based on the good stability of the lithium iron phosphate battery in high-temperature environments and the high discharge efficiency of the ternary lithium battery in low-temperature conditions, the charge and discharge strategies of the lithium iron phosphate battery and the ternary lithium battery are dynamically adjusted to ensure optimal energy conversion and storage efficiency under different ambient temperatures, thereby extending the service life of the solar lamp and improving the overall energy utilization efficiency.

[0050] Specifically, it further includes a linear voltage regulator module. The input end of the linear voltage regulator module is connected to the positive terminal of the lithium iron phosphate battery, and the output end of the linear voltage regulator module is respectively connected to the controller and the temperature monitoring module.

[0051] By adopting the above technical solution, the output voltage of the lithium iron phosphate battery is regulated to 2.5V to supply power to the control chip U2 and the thermistor R3.

[0052] Specifically, the power supply switching circuit includes a ternary lithium battery switching circuit and a lithium iron phosphate battery switching circuit. Among them, the ternary lithium battery switching circuit includes MOS transistors Q1 and Q2. One end of the gate of MOS transistor Q2 is connected to one end of resistor R10 and resistor R11. The other end of resistor R10 is connected to pin 5 of the control chip U2. The source of MOS transistor Q2 is connected to one end of resistor R12. The other ends of resistor R11 and resistor R12 are both connected to the GND terminal. The drain of MOS transistor Q2 is connected to the gate of MOS transistor Q1 and one end of resistor R9. The other end of resistor R9 and the source of MOS transistor Q1 are both connected to the positive terminal of the ternary lithium battery. The drain of MOS transistor Q2 is connected to the positive terminal of the solar lamp;

[0053] By adopting the above technical solution, when the pin 5 of the control chip U2 outputs a high level, MOS transistors Q2 and Q3 are turned on, and the ternary lithium battery supplies power to the solar lamp.

[0054] Specifically, the lithium iron phosphate battery switching circuit includes MOS transistors Q3 and Q4. One end of the gate of MOS transistor Q4 is connected to one end of resistor R14 and resistor R15. The other end of resistor R14 is connected to pin 3 of the control chip U2. The source of MOS transistor Q4 is connected to one end of resistor R16. The other ends of resistor R15 and resistor R16 are both connected to the GND terminal. The drain of MOS transistor Q4 is connected to the gate of MOS transistor Q3 and one end of resistor R13. The other end of resistor R13 and the source of MOS transistor Q3 are both connected to the positive terminal of the lithium iron phosphate battery. The drain of MOS transistor Q3 is connected to the positive terminal of the solar lamp.

[0055] By adopting the above technical solution, when the pin 3 of the control chip U2 outputs a high level, MOS transistors Q3 and Q4 are turned on, and the lithium iron phosphate battery supplies power to the solar lamp.

[0056] In the present invention, the ternary lithium battery switching circuit and the lithium iron phosphate battery switching circuit respectively use an N-channel MOS transistor paired with a P-channel MOS transistor to achieve switching, which solves the problem that the voltage difference between the GS terminals of a single MOS transistor is too small, resulting in incomplete cut-off of the MOS transistor.

[0057] Specifically, the temperature monitoring module includes a thermistor R3. One end of the thermistor R3 is connected to the output terminal of the linear voltage regulation module. The other end of the thermistor R3 is respectively connected to resistor R8 and pin 12 of the control chip U2. The other end of resistor R8 is connected to the GND terminal.

[0058] By adopting the above technical solution, the temperature monitoring module monitors the temperature value of the current environment in real time, providing accurate temperature sensing for the controller, so as to achieve the optimal energy conversion and storage efficiency.

[0059] Specifically, the positive terminal of the solar panel is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the positive terminal of the lithium iron phosphate battery.

[0060] By adopting the above technical solution, the current backflow of the lithium iron phosphate battery to the solar panel is avoided.

[0061] Specifically, the LED driving module includes MOS transistor Q5. One end of the gate of MOS transistor Q5 is connected to one end of resistor R4 and resistor R7 respectively. The other end of resistor R4 is connected to pin 16 of control chip U2. The other end of resistor R7 and the source electrode of MOS transistor Q5 are connected to the GND terminal. The drain electrode of MOS transistor Q5 is connected to the negative terminal of the solar lamp.

[0062] By adopting the above technical solution, it is used to control the lighting and extinguishing of the solar lamp.

[0063] Specifically, the DC-DC boost module includes chip U1, and the model of chip U1 is ME2118-SOT23-5. Pin 5 of chip U1 is connected to one end of inductor L1. The other end of inductor L1 is respectively connected to the positive terminal of the lithium iron phosphate battery and one end of capacitor C1. Pin 2 of chip U1 is respectively connected to the positive terminal of the ternary lithium battery and one end of capacitor C2. The other ends of capacitor C1 and capacitor C2 and pin 4 of chip U1 are all connected to the GND terminal. Pin 1 of chip U1 is connected to pin 11 of control chip U2.

[0064] By adopting the above technical solution, it is used to boost the output voltage of the lithium iron phosphate battery to 5V for charging the ternary lithium battery.

[0065] Embodiment 2

[0066] The difference between this embodiment and Embodiment 1 lies in: Specifically, the voltage acquisition module includes a solar panel acquisition circuit, a lithium iron phosphate battery acquisition circuit, and a ternary lithium battery acquisition circuit. Among them, the solar panel acquisition circuit includes resistor R1 and resistor R5. One end of resistor R1 is connected to resistor R5 and pin 17 of control chip U2 respectively. The other end of resistor R1 is connected to the positive terminal of the solar panel. The other end of resistor R5 is connected to the GND terminal. The lithium iron phosphate battery acquisition circuit includes resistor R2 and resistor R6. One end of resistor R2 is connected to resistor R6 and pin 20 of control chip U2 respectively. The other end of resistor R2 is connected to the positive terminal of the lithium iron phosphate battery. The other end of resistor R6 is connected to the GND terminal. The ternary lithium battery acquisition circuit includes resistor R17 and resistor R18. One end of resistor R17 is connected to resistor R18 and pin 19 of control chip U2 respectively. The other end of resistor R17 is connected to the positive terminal of the ternary lithium battery. The other end of resistor R18 is connected to the GND terminal.

[0067] By adopting the above technical solution, resistors R1 and R5 serve as sampling resistors at the output end of the solar panel to collect the output voltage of the solar panel, thereby determining whether it is day or night. Resistors R2 and R6 serve as sampling resistors at the output end of the lithium iron phosphate battery to collect the output voltage of the lithium iron phosphate battery, thereby determining the power of the lithium iron phosphate battery and deciding whether to charge the ternary lithium battery. Resistors R17 and R18 serve as sampling resistors at the output end of the ternary lithium battery to collect the output voltage of the ternary lithium battery, thereby determining the power of the ternary lithium battery and deciding whether to supply power to the solar lamp by the ternary lithium battery.

[0068] Embodiment 3

[0069] Furthermore, a system for improving the efficiency and lifespan of a solar lamp based on dual power management according to the present invention includes the following steps:

[0070] S1. In the case of sufficient light, the solar panel converts light energy into electrical energy to charge the lithium iron phosphate battery.

[0071] S2. The temperature monitoring module continuously collects the ambient temperature and transmits the temperature value to the controller. The controller determines whether the current temperature is higher or lower than the set temperature threshold, and determines whether the current period is day or night, as well as the power of the lithium iron phosphate battery.

[0072] S3. If the temperature is lower than the set temperature threshold, and it is day and the power of the lithium iron phosphate battery is higher than the set value, the controller sends an enable signal to the DC-DC boost module to boost the output voltage of the lithium iron phosphate battery to 5V to charge the ternary lithium battery.

[0073] S4. If the temperature is lower than the set temperature threshold and it is night, then determine whether the power of the ternary lithium battery is higher than the set value. If it is higher than the set value, turn on the switch circuit of the ternary lithium battery to supply power to the solar lamp, and output a PWM signal to the LED driver module to light up the solar lamp. If it is lower than the set value, turn on the switch circuit of the lithium iron phosphate battery to supply power to the solar lamp with the lithium iron phosphate battery;

[0074] S5. If the temperature is higher than the set temperature threshold and it is day, then no action is taken;

[0075] S6. If the temperature is higher than the set temperature threshold and it is night, then turn on the lithium iron phosphate switch circuit to supply power to the solar lamp, and output a PWM signal to the LED driver module to light up the solar lamp.

[0076] Specifically, in step S2, the controller calculates the average temperature of the previous five days, and then takes the average value of the average temperature of the previous five days as the set temperature threshold T. The calculation formula is:

[0077]

[0078] where t n represents the average temperature value of the previous day.

[0079] By adopting the above technical solution, taking the average value of the average temperature of the previous five days as the set temperature threshold makes the set temperature threshold more in line with the current environment and can change with the change of seasons, thus ensuring the optimal energy conversion and storage efficiency.

[0080] In summary, the present invention monitors the ambient temperature in real time through the temperature monitoring module. Based on the good stability of the lithium iron phosphate battery in a high-temperature environment and the high discharge efficiency of the ternary lithium battery in a low-temperature condition, the charging and discharging strategies of the lithium iron phosphate battery and the ternary lithium battery are dynamically adjusted to ensure optimal energy conversion and storage efficiency at different ambient temperatures, thereby extending the service life of the solar lamp and improving the overall energy utilization efficiency. In the present invention, the ternary lithium battery switching circuit and the lithium iron phosphate battery switching circuit are respectively implemented by an N-channel MOS transistor paired with a P-channel MOS transistor, solving the problem that the cut-off of the MOS transistor is incomplete due to too small a voltage difference at the GS terminal of a single MOS transistor. The present invention monitors the temperature value of the current environment in real time through the temperature monitoring module, providing accurate temperature sensing for the controller, thereby achieving optimal energy conversion and storage efficiency. The present invention uses resistor R1 and resistor R5 as sampling resistors at the output end of the solar panel to collect the output voltage of the solar panel, thereby realizing the judgment of day or night. The present invention uses resistor R2 and resistor R6 as sampling resistors at the output end of the lithium iron phosphate battery to collect the output voltage of the lithium iron phosphate battery, thereby judging the power of the lithium iron phosphate battery and deciding whether to charge the ternary lithium battery. The present invention uses resistor R17 and resistor R18 as sampling resistors at the output end of the ternary lithium battery to collect the output voltage of the ternary lithium battery, thereby judging the power of the ternary lithium battery and deciding whether to supply power to the solar lamp by the ternary lithium battery, avoiding the problem of ineffective lighting caused by insufficient power of the ternary lithium battery. The present invention uses the average value of the average temperature of the previous five days as the set temperature threshold, making the set temperature threshold more in line with the current environment and capable of changing with the seasons, thereby ensuring optimal energy conversion and storage efficiency.

[0081] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for improving the efficiency and lifespan of a solar lamp based on dual power management, characterized in that: It includes a solar panel, a lithium iron phosphate battery, a ternary lithium battery, a DC-DC boost module, an LED drive module, a temperature monitoring module, a power supply switching module, a voltage acquisition module, and a controller. Among them, The solar panel is used to convert light energy into electrical energy to charge the lithium iron phosphate battery; The lithium iron phosphate battery is used to store electrical energy, supply power to the solar lamp or charge the ternary lithium battery; The ternary lithium battery is used to store electrical energy and supply power to the solar lamp; The DC-DC boost module is used to boost the output voltage of the lithium iron phosphate battery to charge the ternary lithium battery; The LED drive module is used to control the on and off of the solar lamp; The temperature monitoring module is used to monitor the ambient temperature in real time and transmit the temperature information to the controller; The power supply switching module connects the corresponding circuit based on the control signal output by the controller; The voltage acquisition module is used to acquire the voltages at the output ends of the solar panel, the lithium iron phosphate battery, and the ternary lithium battery; The controller includes a control chip U2, which is used for receiving, processing, and outputting signals.

2. The system for improving the efficiency and lifespan of a solar lamp based on dual power management according to claim 1, wherein: It also includes a linear voltage regulator module. The input end of the linear voltage regulator module is connected to the positive terminal of the lithium iron phosphate battery, and the output end of the linear voltage regulator module is respectively connected to the controller and the temperature monitoring module.

3. A system for improving the efficiency and lifespan of a solar lamp based on dual power supply management according to claim 1, characterized in that: The power supply switching circuit includes a ternary lithium battery switching circuit and a lithium iron phosphate battery switching circuit. Among them, The ternary lithium battery switching circuit includes MOS transistors Q1 and Q2. One end of the gate of MOS transistor Q2 is respectively connected to one end of resistor R10 and resistor R11. The other end of resistor R10 is connected to pin 5 of control chip U2. The source of MOS transistor Q2 is connected to one end of resistor R12. The other ends of resistor R11 and resistor R12 are both connected to the GND terminal. The drain of MOS transistor Q2 is connected to the gate of MOS transistor Q1 and one end of resistor R9. The other end of resistor R9 and the source of MOS transistor Q1 are both connected to the positive terminal of the ternary lithium battery. The drain of MOS transistor Q2 is connected to the positive terminal of the solar lamp; The lithium iron phosphate battery switching circuit includes MOS transistors Q3 and Q4. One end of the gate of MOS transistor Q4 is respectively connected to one end of resistor R14 and resistor R15. The other end of resistor R14 is connected to pin 3 of control chip U2. The source of MOS transistor Q4 is connected to one end of resistor R16. The other ends of resistor R15 and resistor R16 are both connected to the GND terminal. The drain of MOS transistor Q4 is connected to the gate of MOS transistor Q3 and one end of resistor R13. The other end of resistor R13 and the source of MOS transistor Q3 are both connected to the positive terminal of the lithium iron phosphate battery. The drain of MOS transistor Q3 is connected to the positive terminal of the solar lamp.

4. A system for improving the efficiency and lifespan of a solar lamp based on dual power supply management according to claim 2, characterized in that: The temperature monitoring module includes a thermistor R3. Among them, one end of thermistor R3 is connected to the output end of the linear voltage regulator module, and the other end of thermistor R3 is respectively connected to resistor R8 and pin 12 of control chip U2. The other end of resistor R8 is connected to the GND terminal.

5. A system for improving the efficiency and lifespan of a solar lamp based on dual power supply management according to claim 1, characterized in that: The voltage acquisition module includes a solar panel acquisition circuit, a lithium iron phosphate battery acquisition circuit, and a ternary lithium battery acquisition circuit. Among them, The solar panel acquisition circuit includes resistor R1 and resistor R5. One end of resistor R1 is connected to resistor R5 and pin 17 of control chip U2 respectively. The other end of resistor R1 is connected to the positive terminal of the solar panel. The other end of resistor R5 is connected to the GND terminal; The lithium iron phosphate battery acquisition circuit includes resistor R2 and resistor R6. One end of resistor R2 is connected to resistor R6 and pin 20 of control chip U2 respectively. The other end of resistor R2 is connected to the positive terminal of the lithium iron phosphate battery. The other end of resistor R6 is connected to the GND terminal; The ternary lithium battery acquisition circuit includes resistor R17 and resistor R18. One end of resistor R17 is connected to resistor R18 and pin 19 of control chip U2 respectively. The other end of resistor R17 is connected to the positive terminal of the ternary lithium battery. The other end of resistor R18 is connected to the GND terminal.

6. The system for improving the efficiency and lifespan of a solar lamp based on dual power supply management according to claim 1, wherein: The positive terminal of the solar panel is connected to the positive terminal of diode D2. The negative terminal of diode D2 is connected to the positive terminal of the lithium iron phosphate battery.

7. A system for improving the efficiency and lifespan of a solar lamp based on dual power management according to claim 1, characterized in that: The LED driving module includes MOS transistor Q5. The gate of MOS transistor Q5 is connected to one end of resistor R4 and resistor R7 respectively. The other end of resistor R4 is connected to pin 16 of control chip U2. The other end of resistor R7 and the source of MOS transistor Q5 are connected to the GND terminal. The drain of MOS transistor Q5 is connected to the negative terminal of the solar lamp.

8. The system for improving the efficiency and lifespan of a solar lamp based on dual power management according to claim 1, wherein: The DC-DC boost module includes chip U1. Pin 5 of chip U1 is connected to one end of inductor L1. The other end of inductor L1 is connected to the positive terminal of the lithium iron phosphate battery and one end of capacitor C1 respectively. Pin 2 of chip U1 is connected to the positive terminal of the ternary lithium battery and one end of capacitor C2 respectively. The other ends of capacitor C1 and capacitor C2 and pin 4 of chip U1 are all connected to the GND terminal. Pin 1 of chip U1 is connected to pin 11 of control chip U2.

9. The implementation method of a system for improving the efficiency and lifespan of a solar lamp based on dual power management according to any one of claims 1-9, characterized in that, It includes the following steps: S1. In sufficient light, the solar panel converts light energy into electrical energy to charge the lithium iron phosphate battery; S2. The temperature monitoring module collects the ambient temperature in real time and transmits the temperature value to the controller. The controller judges whether the current temperature is higher or lower than the set temperature threshold, and judges whether the current period is day or night, and the power of the lithium iron phosphate battery; S3. If the temperature is lower than the set temperature threshold, and it is daytime and the power of the lithium iron phosphate battery is higher than the set value, the controller sends an enable signal to the DC-DC boost module to boost the output voltage of the lithium iron phosphate battery to 5V to charge the ternary lithium battery; S4. If the temperature is lower than the set temperature threshold and it is night, then judge whether the power of the ternary lithium battery is higher than the set value. If it is higher than the set value, turn on the ternary lithium battery switch circuit to supply power to the solar lamp and output a PWM signal to the LED driving module to light up the solar lamp. If it is lower than the set value, turn on the lithium iron phosphate battery switch circuit, and the lithium iron phosphate battery supplies power to the solar lamp; S5. If the temperature is higher than the set temperature threshold and it is daytime, no action is taken; S6. If the temperature is higher than the set temperature threshold and it is night, turn on the lithium iron phosphate switch circuit to supply power to the solar lamp, and output a PWM signal to the LED driving module to turn on the solar lamp.

10. The implementation method of a system for improving the efficiency and lifespan of a solar lamp based on dual power supply management according to claim 9, characterized in that: In step S2, the controller calculates the average temperature of the previous five days, and then takes the average value of the average temperature of the previous five days as the set temperature threshold T. The calculation formula is: Among them, t n represents the average temperature value of the previous day.

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