CN109963372B - Solar LED driving device and solar street lamp - Google Patents
Solar LED driving device and solar street lamp Download PDFInfo
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- CN109963372B CN109963372B CN201711402183.XA CN201711402183A CN109963372B CN 109963372 B CN109963372 B CN 109963372B CN 201711402183 A CN201711402183 A CN 201711402183A CN 109963372 B CN109963372 B CN 109963372B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a solar LED driving device and a solar street lamp, wherein the driving device comprises a photovoltaic panel assembly, a light source assembly and a light source assembly, wherein the photovoltaic panel assembly is used for converting solar energy to output photovoltaic current; the battery cell is connected with the photovoltaic panel assembly; the first boosting module is used for boosting and converting first voltage output by the battery cell during discharging so as to output second voltage; the second boosting module is used for boosting and converting the second voltage to output a third voltage when the first discharging switch is closed; the constant current driving module is connected with the LED lamp and is connected with the second boosting module through a second discharge switch; the main control module is used for acquiring the discharge parameters of the battery cell and controlling the on-off states of the first discharge switch and the second discharge switch according to the discharge parameters, wherein when the main control module controls the first discharge switch and the second discharge switch to be turned on and off, the main control module also inputs a driving control signal to the constant current driving module so as to control the LED lamp to emit light.
Description
Technical Field
The invention relates to the technical field of lamps, in particular to a solar LED driving device and a solar street lamp.
Background
At present, the technical development and the practical application in the field of new energy are greatly supported at home and abroad, and solar energy is used as a main renewable energy source and is applied to various aspects of daily life, such as solar water heaters, solar street lamps and the like, so that the solar street lamp not only responds to the call of sustainable development and low-carbon economy at home and abroad, but also enriches the lives of people. Solar street lamps are widely used in many cities in China as the basic construction of city development.
However, the driving device in the solar street lamp in the related art does not protect the internal battery cell sufficiently, and a transformer and other devices need to be added in the driving device to drive the battery cell with lower output voltage to drive the chip requiring higher power supply voltage, so that the production cost is higher.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a solar LED driving apparatus, which can not only effectively protect the electrical core thereof and greatly improve the reliability thereof, but also supply power to a plurality of components therein, and has a low production cost and an energy saving function.
The second purpose of the invention is to provide a solar street lamp.
In order to achieve the above object, a first embodiment of the present invention provides a solar LED driving apparatus, including a photovoltaic panel assembly, configured to convert solar energy to output a photovoltaic current; the battery cell is connected with the photovoltaic panel assembly so as to charge the battery cell through the photovoltaic current output by the photovoltaic panel assembly; the first boosting module is used for boosting and converting first voltage output by the battery cell during discharging so as to output second voltage; the second boosting module is connected with the first boosting module through a first discharging switch and used for boosting and converting the second voltage to output a third voltage when the first discharging switch is closed; the constant current driving module is connected with the LED lamp and is connected with the second boosting module through a second discharge switch; the main control module is connected with the first boosting module to supply power to the main control module through the second voltage output by the first boosting module, and is also connected with the first discharge switch, the second discharge switch and the constant current driving module respectively, the main control module is used for acquiring discharge parameters of the battery cell and controlling the on-off states of the first discharge switch and the second discharge switch according to the discharge parameters, wherein the main control module controls the first discharge switch and the second discharge switch to be closed, so that when the constant current driving module is supplied with power through the third voltage output by the second boosting module, a driving control signal is input to the constant current driving module to control the LED lamp to emit light.
According to the solar LED driving device provided by the embodiment of the invention, solar energy is converted through the photovoltaic panel assembly to output photovoltaic current, the electric core is charged, the first voltage output when the electric core is discharged is subjected to boost conversion through the first boost module to output the second voltage, the second voltage is subjected to boost conversion through the second boost module when the first discharge switch is closed to output the third voltage, the discharge parameters of the electric core are obtained through the main control module, the switching states of the first discharge switch and the second discharge switch are controlled according to the discharge parameters, and the main control module also inputs a driving control signal to the constant-current driving module when the first discharge switch and the second discharge switch are controlled to be closed so as to control the LED lamp to emit light. Therefore, the battery cell can be effectively protected, the reliability of the battery cell is greatly improved, a plurality of parts in the battery cell can be powered, the production cost is low, and the energy-saving function is achieved.
In order to achieve the above object, a second embodiment of the invention provides a solar street light.
The solar street lamp of the embodiment of the invention comprises at least one solar LED driving device provided in the above embodiment of the invention, and the specific implementation manner thereof can refer to the above embodiment, and is not described herein again in order to avoid redundancy.
According to the solar street lamp provided by the embodiment of the invention, the electric core of the solar street lamp can be effectively protected, the reliability of the solar street lamp is greatly improved, a plurality of components in the solar street lamp can be powered, the production cost is low, and the solar street lamp has an energy-saving function.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a block schematic diagram of a solar LED driving apparatus according to an embodiment of the present invention;
fig. 2 is a block schematic diagram of a solar LED driving apparatus according to an embodiment of the first aspect of the present invention;
fig. 3 is a schematic structural diagram of a constant current driving module according to an embodiment of the invention;
fig. 4 is a schematic diagram of a parallel structure of a solar driving apparatus according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a solar LED driving apparatus and a solar street light according to an embodiment of the present invention with reference to the drawings.
Fig. 1 is a block diagram illustrating a solar LED driving apparatus according to an embodiment of the present invention.
As shown in fig. 1, a solar LED driving apparatus 1 according to an embodiment of the present invention includes a photovoltaic panel assembly 10, a battery cell 20, a first voltage boosting module 30, a second voltage boosting module 40, a constant current driving module 50, and a main control module 60.
The photovoltaic panel assembly 10 is used for converting solar energy to output photovoltaic current; the battery cell 20 is connected with the photovoltaic panel assembly 10, so that the battery cell 20 is charged by the photovoltaic current output by the photovoltaic panel assembly 10; the first voltage boosting module 30 is configured to boost and convert a first voltage output by the electric core 20 during discharging to output a second voltage; the second boost module 40 is connected to the first boost module 30 through the first discharging switch K1, and the second boost module 40 is configured to boost and convert the second voltage to output a third voltage when the first discharging switch K1 is closed; the constant current driving module 50 is connected with the LED lamp and is connected with the second boosting module 40 through a second discharging switch K2; the main control module 10 is connected to the first voltage boosting module 30 to supply power to the main control module 10 through the second voltage output by the first voltage boosting module 30, the main control module 10 is further connected to the first discharge switch K1, the second discharge switch K2 and the constant current driving module 50, the main control module 10 is configured to obtain a discharge parameter of the battery cell 20, and control the on-off states of the first discharge switch K1 and the second discharge switch K2 according to the discharge parameter, wherein the main control module 10 controls the first discharge switch K1 and the second discharge switch K2 to be turned on, and when the constant current driving module 50 is supplied with power through the third voltage output by the second voltage boosting module 40, further inputs a driving control signal to the constant current driving module 50 to control the LED lamp to emit light.
In an embodiment of the present invention, the battery cell 20 may be a single battery cell with a large capacity, so as to serve as an energy storage unit of the solar LED driving apparatus 1, and can meet the power requirement of each component in the solar LED driving apparatus 1. The battery cell can be a single lithium iron phosphate battery cell, and the nominal voltage can be 3.2V. Adopt monomer electricity core, compare in establishing ties a plurality of electric cores, not only avoid taking place the phenomenon that electric core charges or discharge imbalance, greatly reduced solar energy LED drive arrangement 1's failure rate moreover.
Specifically, as shown in fig. 2, the battery cell 20 may be connected to the photovoltaic panel assembly 10 through a first switch circuit 70, and the first switch circuit 70 is connected to the main control module 60. The first switch circuit 70 may include a charging switch K3, and the main control module 60 controls the charging switch K3 to be closed to charge the battery cells 20 through the photovoltaic current output by the photovoltaic panel assembly 10.
Further, as shown in fig. 2, the first switch circuit 70 may further include a current sampling unit 71, and the main control module 60 obtains a charging current when the battery cell 20 is charged through the current sampling unit 71, determines whether the charging current is smaller than a preset current threshold, and controls the charging switch K3 to turn off to stop charging the battery cell 20 when the charging current is smaller than the preset current threshold. The current sampling unit 71 may include a sampling resistor, and the preset current threshold may be set to 0.5A. In addition, the first switching circuit 70 may further include a fuse or the like.
That is to say, when the illumination intensity of the sunlight received by the photovoltaic panel assembly 10 is not large, the charging current when the photovoltaic panel assembly 10 charges the electric core 20 is small, that is, the charging current is smaller than the preset current threshold, for example, smaller than 0.5A, at this time, the efficiency of charging the electric core 20 through the photovoltaic panel assembly 10 is low, and the charging switch K3 can be controlled to be turned off by the main control module 60 to stop charging the electric core 20.
It should be noted that, since the photovoltaic panel assembly 10 can output a large photovoltaic current, the photovoltaic current needs to be input into the battery cell 20 through the first switch circuit 70, the charging switch K3 in the first switch circuit 70 may employ a MOS transistor with a large power to ensure that the first switch circuit 70 is not damaged, and correspondingly, a large voltage signal, such as a 12V voltage signal, needs to be input to the charging switch K3 in the first switch circuit 70 to enable the charging switch K3 to operate normally.
In an embodiment of the present invention, the first voltage output by the battery cell 20 may fluctuate within a certain range (the minimum input voltage is 1.8V), and the main control module 60 needs a very stable voltage to supply power to the battery cell, so that the first voltage output by the battery cell 20 may be subjected to a step-up conversion by the first step-up module 30 to obtain a constant second voltage (e.g., a constant voltage of 5V). The second voltage can be input into a Low Dropout Regulator (LDO), and a stable voltage (e.g., 3.3V) can be output after conversion of the LDO and input into the main control module 60 to power the main control module 60. The second voltage can directly power peripheral circuits (such as an operational amplifier, a comparator, etc.) of the main control module 60.
Further, the second voltage output by the first voltage boosting module 30 may also be input to the second voltage boosting module 40, and the second voltage boosting module 40 may output a constant third voltage (for example, a constant 12V) after performing voltage boosting conversion thereon, so as to meet the requirement of the second voltage boosting module 40.
In an embodiment of the present invention, when the constant current driving module 50 is not required to operate, that is, when the constant current driving module 50 is not required to drive the LED lamp to operate, the constant current driving module 50 may be in a sleep state (in this state, the constant current driving module 50 may temporarily stop operating, and the constant current driving module 50 may be awakened at any time by inputting a voltage signal to the constant current driving module 50, so that the constant current driving module 50 may operate normally), and when the constant current driving module 50 is required to operate, the voltage signal may be input to the constant current driving module 50 through the battery cell 20 directly connected to the constant current driving module 50, and the constant current driving module 50 may be awakened to operate normally, so that power consumption of the constant current driving module 50 may be reduced.
In an embodiment of the present invention, as shown in fig. 2, the solar LED driving apparatus 1 further includes an illumination collecting module 80, where the illumination collecting module 80 is configured to collect illumination intensity of an environment, the main control module 60 is connected to the illumination collecting module 80, and the main control module 60 is configured to determine whether the illumination intensity is smaller than a preset illumination threshold, and when the illumination intensity is smaller than the preset illumination threshold, control the first discharge switch K1 and the second discharge switch K2 to be turned on, and input a driving control signal to the constant current driving module 50 to control the LED lamp to emit light. The illumination collection module 80 may include a photosensitive probe, an illumination signal sampling circuit, and the like, and the first discharge switch K1 and the second discharge switch K2 may be MOS transistors with small power, and do not need an external voltage signal.
That is to say, when the illumination intensity of the environment is low, that is, the illumination intensity is less than the preset illumination threshold, for example, less than 10 lux, and the LED lamp is required to perform illumination, the main control module 60 may control the first discharge switch K1 and the second discharge switch K2 to be closed, so that the electric energy stored in the battery cell 20 is input into the constant current driving module through the first discharge switch K1 and the second discharge switch K2, and a driving control signal is input into the constant current driving module to control the LED lamp to emit light.
In an embodiment of the present invention, when the main control module 60 is not required to operate, the main control module 60 may be in a sleep state (in this state, the main control module 60 may stop operating, and the main control module 60 may be awakened at any time by inputting a voltage signal to the main control module 60, so that the main control module 60 operates normally), and when the main control module 60 is required to operate, the voltage signal may be input to the main control module 60 through the photovoltaic panel assembly 10 directly connected to the main control module 60, and the main control module 60 may be awakened to operate, thereby reducing power consumption of the main control module 60.
In an embodiment of the present invention, the discharge parameter may include a discharge voltage, and the main control module 60 is configured to determine whether the discharge voltage is smaller than a first preset voltage threshold, and control the second discharge switch K2 to turn off to stop supplying power to the constant current driving module when the discharge voltage is smaller than the first preset voltage threshold.
The main control module is further configured to obtain the output voltage of the constant current driving module 50, determine whether the output voltage is greater than a second preset voltage threshold, and control the second discharging switch K2 to turn off when the output voltage is greater than the second preset voltage threshold, so as to stop supplying power to the constant current driving module 50.
Specifically, when the main control module 60 determines that the discharge voltage is smaller than the first preset voltage threshold, that is, when the battery cell 20 is over-discharged, the amount of electricity stored in the battery cell 20 is not enough to normally supply power to the constant current driving module 50, at this time, the second discharge switch K2 may be rapidly controlled to be turned off, and power supply to the constant current driving module 50 may be timely stopped.
When the main control module 60 determines that the output voltage of the constant current driving module is greater than the second preset voltage threshold, that is, the output voltage of the constant current driving module is too high, the second discharge switch K2 can be rapidly controlled to be turned off, and the power supply to the constant current driving module 50 is stopped in time, so that the constant current driving module 50 stops outputting higher voltage, and the LED lamp is prevented from being damaged.
Further, the main control module 60 is further configured to control the first discharging switch K1 to be turned off according to the energy saving control instruction, so as to reduce power consumption.
Specifically, when the solar driving apparatus 1 is in the transportation or storage process, that is, the solar driving apparatus 1 is not yet put into use, a corresponding energy-saving control instruction may be input to the main control module 60, so that the main control module may control the first discharging switch K1 to be turned off according to the energy-saving control instruction, and stop the operation of the second voltage boosting module 40, thereby enabling the solar LED driving apparatus 1 to enter the low power consumption mode, and saving the power consumption of the battery cell 20 to the maximum extent.
After the solar driving device 1 is installed on a road surface, when it is not necessary to charge the electric core 20, for example, the electric core 20 is fully charged, and it is not necessary to discharge the electric core 20, for example, the electric core 20 is fully charged and the illumination intensity of the environment is high, or the electric core is over-discharged at night, the main control module 60 may automatically generate a corresponding energy saving control instruction to control the first discharging switch K1 to be turned off, so that the second boosting module 40 stops working, and thus the solar LED driving device 1 enters a low power consumption mode, thereby saving the power consumption of the electric core 20 to the maximum extent. In an embodiment of the present invention, as shown in fig. 2, the solar LED driving apparatus 1 further includes a dimming switch assembly 90, the dimming switch assembly 90 is connected to the constant current driving module 50, and the dimming switch assembly 90 includes a plurality of switching elements, wherein the output power of the constant current driving module 50 is adjusted by changing the switching states of the plurality of switching elements.
In an embodiment of the present invention, as shown in fig. 3, the constant current driving module 50 may adopt an LED driver TPS92690, a plurality of switch elements in the dimming switch assembly 90 may be respectively connected to a pin ADJ of the TPS92690 through corresponding voltage dividing resistors, and a voltage of the pin ADJ may be adjusted by changing a switching state of the plurality of switch elements in the dimming switch assembly 90, so as to adjust an output voltage of the LED driver TPS92690, that is, an output power of the regulator. The pin Vref of TPS92690 can input a 2.5V reference voltage as its reference voltage.
The dimming switch assembly 90 may adopt a dial switch, and the output power of the constant current driving module 50 may be adjusted to different power levels by adjusting the switching state of the dial switch, for example, the output power of the constant current driving module 50 may be adjusted to 40W, 30W, 20W, 15W.
Therefore, the output power of the constant current driving module 50 can be divided into different power levels according to requirements, so as to meet the requirements of different LED lamp suppliers.
In an embodiment of the present invention, the main control module 60 is further configured to obtain a continuous light emitting time of the LED lamp, determine whether the continuous light emitting time is greater than a preset time threshold, and adjust a driving control signal input to the constant current driving module 50 when the continuous light emitting time is greater than the preset time threshold, so as to reduce the brightness of the LED lamp.
Specifically, the driving control signal input to the constant current driving module 50 may be a PWM signal, and when the LED lamp is controlled to continuously emit light for a period of time, for example, after 5 hours, pedestrians, vehicles, etc. in the lighting area may be greatly reduced, at this time, the output power of the constant current driving module 50 may be adjusted by adjusting parameters such as the duty ratio of the PWM signal input to the pin nDIM of the constant current driving module 50 in a software control manner, specifically, the output power of the constant current driving module 50 may be correspondingly reduced by reducing the duty ratio of the PWM signal, for example, the duty ratio of the PWM signal may be reduced to reduce the output power by 50%, thereby reducing the brightness of the LED lamp and reducing the power consumption of the battery core.
In summary, by combining software and hardware, the constant current driving module 50 can be adjusted to output different power levels according to the requirements, and the hardware and software of the constant current driving module 50 with different power levels are completely identical in design (except for the difference of buttons of the dial switch), which not only facilitates production and management, but also greatly reduces the production cost.
In an embodiment of the present invention, as shown in fig. 2, the solar LED driving apparatus 1 may further include a temperature acquisition module 100, where the temperature acquisition module 100 is configured to acquire the temperature of the battery cell 20, where the main control module 60 is configured to determine whether the temperature of the battery cell 20 is greater than a first preset temperature threshold or less than a second preset temperature threshold when the battery cell 20 is charged, and control the charging switch K3 to turn off to stop charging the battery cell 20 when the temperature of the battery cell 20 is greater than the first preset temperature threshold or less than the second preset temperature threshold, where the second preset temperature threshold is less than the first preset temperature threshold; the main control module 60 is configured to, when supplying power to the constant current driving module 50, determine whether the temperature of the battery cell 20 is greater than a third preset temperature threshold or less than a fourth preset temperature threshold, and control the second discharge switch to be turned off when the temperature of the battery cell 20 is greater than the second preset temperature threshold or less than the fourth preset temperature threshold, so as to stop supplying power to the constant current driving module 50, where the fourth preset temperature threshold is less than the third preset temperature threshold.
That is, when the battery cell 20 operates in the charging mode, it may correspond to a temperature range in which it normally operates. When the temperature of the battery cell is greater than the maximum value of the normal operation temperature range of the battery cell, that is, the temperature of the battery cell is greater than a first preset temperature threshold, the main control module 60 may determine that the battery cell 20 enters an over-temperature working state, and correspondingly, the main control module 60 may control the charging switch K3 to be turned off, so that the battery cell 20 enters a high-temperature protection state until the protection is eliminated, that is, the temperature of the battery cell is within the normal operation temperature range of the battery cell, the main control module 60 controls the charging switch K3 to be turned on, and the battery cell 20 may normally; when the temperature of the battery cell is smaller than the minimum value of the temperature range of the normal operation of the battery cell, that is, the temperature of the battery cell is smaller than the second preset temperature threshold, the battery cell cannot be normally charged, and at this time, the main control module 60 can control the charging switch K3 to be turned off, so that the battery cell 20 enters a low-temperature protection state. Until the protection is eliminated, that is, the temperature of the battery cell is in the temperature range of normal operation, the main control module 60 controls the charging switch K3 to be closed, and the battery cell 20 can normally operate.
When cell 20 is operating in the discharge mode, it may correspond to a temperature range in which it is operating normally. When the temperature of the battery cell is greater than the maximum value of the temperature range of the normal operation of the battery cell, that is, the temperature of the battery cell is greater than the third preset temperature threshold value, the main control module 60 may determine that the battery cell 20 enters the over-temperature working state, and correspondingly, the main control module 60 may control the charging switch K3 to be turned off, so that the battery cell 20 enters the high-temperature protection state. Until the protection is eliminated, that is, the temperature of the battery cell is within the temperature range of normal operation, the main control module 60 controls the charging switch K3 to be closed, and the battery cell 20 can normally operate; when the temperature of the battery cell is smaller than the minimum value of the temperature range of the normal operation of the battery cell, that is, the temperature of the battery cell is smaller than the fourth preset temperature threshold, the battery cell cannot be normally charged, and at this time, the main control module 60 may control the charging switch K3 to be turned off, so that the battery cell 20 enters the low-temperature protection state. Until the protection is eliminated, that is, the temperature of the battery cell is in the temperature range of normal operation, the main control module 60 controls the charging switch K3 to be closed, and the battery cell 20 can normally operate. Wherein the first predetermined temperature threshold may be equal to the third predetermined temperature threshold.
In one embodiment of the present invention, when the battery cell 20 operates in the charging mode, the temperature range of the normal operation may be 0-55 ℃. When the temperature of the battery cell is higher than 55 ℃, the main control module 60 can judge that the battery cell 20 enters an over-temperature working state, correspondingly, the main control module 60 can control the charging switch K3 to be switched off, so that the battery cell 20 enters a high-temperature protection state until the protection is eliminated, namely, the temperature of the battery cell 20 is 0-55 ℃, the main control module 60 controls the charging switch K3 to be switched on, and the battery cell 20 can normally work; when the temperature of electric core is less than 0 ℃, the electric core can not normally charge, at this moment, the disconnection of the controllable charge switch K3 of main control module 60 to make electric core 20 enter the low temperature protection state, until the protection is eliminated, namely the temperature of electric core 20 is at 0 ~ 55 ℃, main control module 60 controls charge switch K3 to be closed, and electric core 20 can normally work.
When the battery cell 20 operates in the discharge mode, the normal operating temperature range may be-10 to 50 ℃. When the temperature of the battery cell is higher than 50 ℃, the main control module 60 can judge that the battery cell 20 enters an over-temperature working state, correspondingly, the main control module 60 can control the charging switch K3 to be switched off, so that the battery cell 20 enters a high-temperature protection state until the protection is eliminated, namely, the temperature of the battery cell 20 is-10 to 50 ℃, the main control module 60 controls the charging switch K3 to be switched on, and the battery cell 20 can normally work; when the temperature of the battery cell is less than-10 ℃, the battery cell cannot be normally charged, at this time, the main control module 60 may control the charging switch K3 to be turned off, so that the battery cell 20 enters a low-temperature protection state until the protection is eliminated, that is, the temperature of the battery cell 20 is-10 to 50 ℃, the main control module 60 controls the charging switch K3 to be turned on, and the battery cell 20 may normally operate.
Further, the solar LED driving device 1 further includes a heating module 110, the heating module 110 is disposed corresponding to the electric core 20, and the heating module 110 is connected to the photovoltaic panel assembly 10 through a first heating switch K4 and is connected to the second voltage boosting module 40 through a second heating switch K5.
The main control module 60 is further configured to, when the battery cell 20 is charged, determine whether the temperature of the battery cell 20 is smaller than a fifth preset temperature threshold, and control the first heating switch K4 to be closed when the temperature of the battery cell 20 is smaller than the fifth preset temperature threshold, so as to supply power to the heating module 110 through the photovoltaic current output by the photovoltaic panel assembly 10, so as to heat the battery cell 20; the main control module 60 is further configured to, when supplying power to the constant current driving module 50, determine whether the temperature of the battery cell 20 is smaller than a sixth preset temperature threshold, and control the second heating switch K5 to be closed when the temperature of the battery cell 20 is smaller than the sixth preset temperature threshold, so as to supply power to the heating module 110 through the third voltage output by the second voltage boosting module 40, so as to heat the battery cell. Since the photovoltaic panel assembly 10 can output a large photovoltaic current, the photovoltaic current can be input into the heating module 110 through the first heating switch K4, and therefore, the first heating switch K4 can adopt a MOS transistor with a large power to ensure that the first heating switch K4 is not damaged, and correspondingly, a large voltage signal needs to be input into the first heating switch K4, such as a 12V voltage signal, so that the charging switch K3 can normally operate. Because the current output by the second boost module 40 is small, the second heating switch K5 can use MOS transistors with small power, and no external voltage signal is required.
In an embodiment of the present invention, when the environmental temperature of the battery cell 20 is lower, the temperature of the battery cell is also lower, and the charging and discharging performance of the battery cell 20 may be greatly affected, in this case, the battery cell 20 may be heated by the heating module 110. When the battery cell 20 operates in the charging mode and the temperature of the battery cell 20 is less than the fifth preset temperature threshold, the main control module 60 may control the first heating switch K4 to be closed, so that the photovoltaic current output by the photovoltaic panel assembly 10 may supply power to the heating module 110, and thus the resistor in the heating module 110 may generate heat to heat the battery cell 20; when the battery cell 20 operates in the discharging mode and the temperature of the battery cell 20 is less than the sixth preset temperature threshold, the main control module 60 may control the second heating switch K5 to be closed, so that the photovoltaic current output by the photovoltaic panel assembly 10 may supply power to the heating module 110, and thus the resistor in the heating module 110 may generate heat to heat the battery cell 20.
Preferably, the fifth preset temperature threshold is greater than or equal to the second preset temperature threshold and smaller than the first preset temperature threshold, and the sixth preset temperature threshold is greater than or equal to the fourth preset temperature threshold and smaller than the third preset temperature threshold.
Therefore, when the battery cell 20 is in a low temperature environment, it is ensured that the temperature of the battery cell 20 is in a temperature range of normal operation, so that the battery cell 20 is ensured to normally operate.
In an embodiment of the present invention, as shown in fig. 2, the solar LED driving apparatus 1 further includes a communication module 120, and the communication module 120 is connected to the main control module 60, wherein the main control module 60 is further configured to obtain fault information and send the fault information to an external device through the communication module 120, and the main control module 60 further receives a control instruction of the external device through the communication module 120.
Specifically, the communication module 120 may connect the solar LED driving apparatus 1 into a network according to regions through a wireless communication technology, and connect the network with an external device (e.g., a mobile phone). The solar LED driving device 1 can be detected in real time through the main control module 60 to obtain fault information of the solar LED driving device 1, and the fault information is sent to an external device through the communication module, so that a worker can know the fault information in time and take corresponding maintenance measures. In addition, when the initial setting of solar LED driving device 1 needs to be changed, it can be remotely changed through the external setting unit, thereby avoiding the situation of on-site disassembly with a lot of manpower and material resources.
In summary, according to the solar LED driving apparatus of the embodiment of the present invention, the photovoltaic panel assembly converts solar energy to output a photovoltaic current, and charges the electrical core, the first voltage boosting module performs voltage boosting conversion on the first voltage output by the electrical core during discharging to output a second voltage, the second voltage boosting module performs voltage boosting conversion on the second voltage to output a third voltage when the first discharging switch is turned off, the main control module obtains the discharging parameter of the electrical core, and controls the on-off states of the first discharging switch and the second discharging switch according to the discharging parameter, and the main control module further inputs a driving control signal to the constant current driving module when controlling the first discharging switch and the second discharging switch to be turned off, so as to control the LED lamp to emit light. Therefore, the battery cell can be effectively protected, the reliability of the battery cell is greatly improved, a plurality of parts in the battery cell can be powered, the production cost is low, and the energy-saving function is achieved.
Corresponding to the embodiment, the invention further provides a solar street lamp.
The solar street lamp of the embodiment of the invention comprises at least one solar LED driving device provided in the above embodiment of the invention, and the specific implementation manner thereof can refer to the above embodiment, and is not described herein again in order to avoid redundancy.
It should be noted that, as shown in fig. 4, when there are a plurality of solar LED driving devices 1 in the solar street light according to the above embodiments, the solar LED driving devices 1 may be used in parallel (only 3 solar LED driving devices 1 are shown in fig. 4, and there may be at least two solar LED driving devices 1), that is, the positive output end of the solar LED driving device 1 is connected to the positive electrode of the LED lamp, and the negative output end of the solar LED driving device 1 is connected to the negative electrode of the LED lamp, so as to meet the requirements for output power in different situations.
According to the solar street lamp provided by the embodiment of the invention, the electric core of the solar street lamp can be effectively protected, the reliability of the solar street lamp is greatly improved, a plurality of components in the solar street lamp can be powered, the production cost is low, and the solar street lamp has an energy-saving function.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (15)
1. A solar LED driving apparatus, comprising:
a photovoltaic panel assembly for converting solar energy to output a photovoltaic current;
the battery cell is connected with the photovoltaic panel assembly so as to charge the battery cell through the photovoltaic current output by the photovoltaic panel assembly;
the first boosting module is used for boosting and converting first voltage output by the battery cell during discharging so as to output second voltage;
the second boosting module is connected with the first boosting module through a first discharging switch and used for boosting and converting the second voltage to output a third voltage when the first discharging switch is closed;
the constant current driving module is connected with the LED lamp and is connected with the second boosting module through a second discharge switch;
the main control module is connected with the first boosting module to supply power to the main control module through the second voltage output by the first boosting module, and is also connected with the first discharge switch, the second discharge switch and the constant current driving module respectively, the main control module is used for acquiring discharge parameters of the battery cell and controlling the on-off states of the first discharge switch and the second discharge switch according to the discharge parameters, wherein the main control module controls the first discharge switch and the second discharge switch to be closed, so that when the constant current driving module is supplied with power through the third voltage output by the second boosting module, a driving control signal is input to the constant current driving module to control the LED lamp to emit light.
2. The solar LED driving apparatus according to claim 1, wherein the battery cell is connected to the photovoltaic panel assembly through a first switch circuit, and the first switch circuit is connected to the main control module, wherein the first switch circuit includes a charging switch, and the main control module charges the battery cell by controlling the charging switch to be closed through the photovoltaic current output from the photovoltaic panel assembly.
3. The solar LED driving apparatus according to claim 2, wherein the first switch circuit further includes a current sampling unit, and the main control module obtains a charging current when the electrical core is charged through the current sampling unit, determines whether the charging current is smaller than a preset current threshold, and controls the charging switch to be turned off to stop charging the electrical core when the charging current is smaller than the preset current threshold.
4. The solar LED driving apparatus according to claim 1, further comprising a light collection module for collecting light intensity of an environment in which the apparatus is located,
the main control module is connected with the illumination acquisition module and used for judging whether the illumination intensity is smaller than a preset illumination threshold value or not, controlling the first discharge switch and the second discharge switch to be closed when the illumination intensity is smaller than the preset illumination threshold value, and inputting a driving control signal to the constant current driving module so as to control the LED lamp to emit light.
5. The solar LED driving device according to claim 4, wherein the discharge parameter includes a discharge voltage, and the main control module is configured to determine whether the discharge voltage is smaller than a first preset voltage threshold, and control the second discharge switch to be turned off to stop supplying power to the constant current driving module when the discharge voltage is smaller than the first preset voltage threshold.
6. The solar LED driving device according to claim 5, wherein the main control module is further configured to obtain an output voltage of the constant current driving module, determine whether the output voltage is greater than a second preset voltage threshold, and control the second discharging switch to be turned off to stop supplying power to the constant current driving module when the output voltage is greater than the second preset voltage threshold.
7. The solar LED driving apparatus according to claim 6, wherein the main control module is further configured to control the first discharging switch to be turned off according to an energy saving control instruction to reduce power consumption.
8. The solar LED driving apparatus according to claim 1, further comprising a dimming switch assembly, the dimming switch assembly being connected to the constant current driving module, the dimming switch assembly including a plurality of switching elements, wherein the output power of the constant current driving module is adjusted by changing switching states of the plurality of switching elements.
9. The solar LED driving device according to claim 8, wherein the main control module is further configured to obtain a continuous light emitting time of the LED lamp, determine whether the continuous light emitting time is greater than a preset time threshold, and adjust a driving control signal input to the constant current driving module when the continuous light emitting time is greater than the preset time threshold, so as to reduce the brightness of the LED lamp.
10. The solar LED driving apparatus according to claim 2, further comprising a temperature acquisition module for acquiring a temperature of the electric core, wherein,
the main control module is used for judging whether the temperature of the battery cell is greater than a first preset temperature threshold value or less than a second preset temperature threshold value when the battery cell is charged, and controlling the charging switch to be switched off to stop charging the battery cell when the temperature of the battery cell is greater than the first preset temperature threshold value or less than the second preset temperature threshold value, wherein the second preset temperature threshold value is less than the first preset temperature threshold value;
the main control module is used for judging whether the temperature of the battery cell is greater than a third preset temperature threshold value or less than a fourth preset temperature threshold value when the constant current driving module is powered on, and controlling the second discharge switch to be switched off when the temperature of the battery cell is greater than the third preset temperature threshold value or less than the fourth preset temperature threshold value so as to stop the power supply on the constant current driving module, wherein the fourth preset temperature threshold value is less than the third preset temperature threshold value.
11. The solar LED driving device according to claim 10, further comprising a heating module disposed corresponding to the electric core, the heating module being connected to the photovoltaic panel assembly through a first heating switch and connected to the second boosting module through a second heating switch, wherein,
the main control module is further configured to determine whether the temperature of the battery cell is less than a fifth preset temperature threshold when the battery cell is charged, and control the first heating switch to be closed when the temperature of the battery cell is less than the fifth preset temperature threshold, so as to supply power to the heating module through the photovoltaic current output by the photovoltaic panel assembly, so as to heat the battery cell;
the main control module is further configured to, when the constant current driving module is powered on, determine whether the temperature of the battery cell is less than a sixth preset temperature threshold, and control the second heating switch to be closed when the temperature of the battery cell is less than the sixth preset temperature threshold, so that the heating module is powered on by a third voltage output by the second voltage boosting module, and the battery cell is heated.
12. The solar LED driving apparatus according to claim 11, wherein the fifth preset temperature threshold is greater than or equal to the second preset temperature threshold and smaller than the first preset temperature threshold, and the sixth preset temperature threshold is greater than or equal to the fourth preset temperature threshold and smaller than the third preset temperature threshold.
13. The solar LED driving apparatus according to claim 1, further comprising a communication module, wherein the communication module is connected to the main control module, and wherein the main control module is further configured to obtain fault information and send the fault information to an external device through the communication module, and the main control module further receives a control command of the external device through the communication module.
14. The solar LED driving apparatus according to any one of claims 1 to 13, wherein the cells are monolithic cells.
15. Solar street light, characterized in that it comprises at least one solar LED driving device according to any one of claims 1 to 14.
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