Power supply device and lighting system

Abstract

The present invention discloses a power supply device and a lighting system. The power supply device includes: a rectifier module, a boost module, a photovoltaic module and a control module are all connected to a DC bus, the rectifier module is connected to AC power, the rectifier module is also connected to a lamp, and the boost module is also connected to the lamp; the control module is respectively connected to the rectifier module, the boost module, the photovoltaic module and the energy storage module; the rectifier module is used to convert AC power into DC power to power the lamp and / or the energy storage module, and to generate a power failure signal when the AC power fails; the boost module is used to boost the voltage of the DC bus to power the lamp; the photovoltaic module is used for photovoltaic power generation; the control module is used to control the charging or discharging of the energy storage module, and drive the boost module according to the power failure signal; the energy storage module is used to power the lamp and the control module. The power supply device of the embodiment of the present invention can continuously supply power to the lamp when the city power fails, which is conducive to avoiding power supply interruption and improving power supply reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting power supplies, and in particular to a power supply device and a lighting system. Background Art

[0002] Street lights refer to lamps that provide lighting for roads. They generally refer to lamps within the scope of road lighting in traffic lighting. Street lights are widely used in various places that require lighting. Street light power supply is a power supply device that provides electricity for street lights.

[0003] Traditional street lamp power supplies are connected to the mains to supply power to lamps. When the mains is cut off, the street lamp power supply will lose power, and the power supply to the lamp will also be interrupted. The power supply reliability of the street lamp power supply is poor. Summary of the invention

[0004] The present invention provides a power supply device and a lighting system to avoid power supply interruption and improve power supply reliability.

[0005] According to one aspect of the present invention, there is provided a power supply device, the power supply device comprising: a rectifier module, a boost module, a photovoltaic module, a control module, a DC bus and an energy storage module;

[0006] The rectifier module, the boost module, the photovoltaic module and the control module are all connected to the DC bus, the rectifier module is connected to the AC power, the rectifier module is also connected to the lamp, and the boost module is also connected to the lamp; the control module is respectively connected to the rectifier module, the boost module, the photovoltaic module and the energy storage module;

[0007] The rectifier module is used to convert AC power into DC power to power the lamp and / or the energy storage module, and to generate a power outage signal when the AC power is off; the boost module is used to boost the voltage of the DC bus to power the lamp; the photovoltaic module is used for photovoltaic power generation; the control module is used to control the charging or discharging of the energy storage module, and to drive the boost module according to the power outage signal; the energy storage module is used to power the lamp and the control module.

[0008] Optionally, the rectifier module includes: a detection unit, a rectifier unit, a first commutation unit and a second commutation unit;

[0009] The detection unit and the rectification unit are connected to the alternating current, the first commutation unit and the second commutation unit are both connected to the commutation unit, the first commutation unit is also connected to the lamp and the control module respectively, the second commutation unit is also connected to the DC bus and the control module respectively, and the detection unit is also connected to the control module;

[0010] The rectifying unit is used to convert alternating current into direct current; the first commutating unit is used to boost the direct current to power the lamp; the second commutating unit is used to step down the direct current to power the energy storage module; the detecting unit is used to detect whether the alternating current is out of power and generate a power outage signal when the alternating current is out of power.

[0011] Optionally, the detection unit includes: a power failure detection circuit.

[0012] Optionally, the photovoltaic module comprises: a photovoltaic unit and a power tracking unit;

[0013] The photovoltaic unit is connected to the input end of the power tracking unit, the output end of the power tracking unit is connected to the DC bus, and the signal output end of the power tracking unit is connected to the control module;

[0014] The photovoltaic unit is used for photovoltaic power generation; the power tracking unit is used to track the maximum power point of the photovoltaic unit; and the control module is also used to control the charging or discharging of the energy storage module according to the maximum power point of the photovoltaic unit.

[0015] Optionally, the control module includes: a switch unit and a control unit;

[0016] The first end of the switch unit is connected to the DC bus, the second end of the switch unit is connected to the energy storage module, the third end of the switch unit is connected to the control unit, and the rectifier module, the boost module, the photovoltaic module and the energy storage module are all connected to the control unit;

[0017] The switch unit is used to control the charging or discharging of the energy storage module; the control unit is used to drive the boost module according to the power failure signal, and control the on or off of the switch unit.

[0018] Optionally, the energy storage module includes: at least one battery cell; a positive electrode of the battery cell and a negative electrode of the battery cell are both connected to the DC bus.

[0019] Optionally, the battery cell is a lithium ion battery cell or a sodium ion battery cell.

[0020] Optionally, the boost module includes: a boost chopper circuit.

[0021] Optionally, the power supply device further includes: a communication module;

[0022] The communication module is connected to the control module; the communication module is used for data exchange.

[0023] According to another aspect of the present invention, there is further provided a lighting system, comprising: a lamp and the power supply device described in any one of the above embodiments.

[0024] The rectifier module of the embodiment of the present invention detects whether the connected AC power is normal, and generates a power-off signal when the AC power is cut off. The control module obtains the power-off signal. When the control module obtains the power-off signal, the control module controls the connection between the energy storage module and the DC bus, and drives the boost module to boost the DC power of the DC bus to power the lamp; when the control module does not obtain the power-off signal, the control module drives the rectifier module to convert the AC power into high-voltage DC power to power the lamp. The power supply device of the embodiment of the present invention stores energy through the mains or photovoltaics during the day, and supplies power to the lamp through the mains or batteries at night. It can continue to supply power to the lamp when the mains power is cut off, which is conducive to avoiding power interruption and improving power supply reliability.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a schematic diagram of a power supply device provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of another power supply device provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of another power supply device provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of another power supply device provided by an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of another power supply device provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of a lighting system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The embodiment of the present invention provides a power supply device. The power supply device stores energy through mains or photovoltaics during the day, and supplies power to lamps through mains or batteries at night. When the mains power fails, the lamps can continue to be supplied with power, which is beneficial to avoid power interruption and improve power supply reliability. Figure 1 Schematic diagram of a power supply device provided by an embodiment of the present invention. Figure 1 The power supply device includes: a rectifier module 110, a boost module 120, a photovoltaic module 130, a control module 140, a DC bus 150 and an energy storage module 160.

[0036] The rectifier module 110, the boost module 120, the photovoltaic module 130 and the control module 140 are all connected to the DC bus 150. The rectifier module 110 is connected to the AC power. The rectifier module 110 is also connected to the lamp 200, and the boost module 120 is also connected to the lamp 200. The control module 140 is respectively connected to the rectifier module 110, the boost module 120, the photovoltaic module 130 and the energy storage module 160. The rectifier module 110 is used to convert the AC power into DC power to power the lamp 200 and / or the energy storage module 160, and to generate a power outage signal when the AC power is off. The boost module 120 is used to boost the voltage of the DC bus 150 to power the lamp 200. The photovoltaic module 130 is used for photovoltaic power generation. The control module 140 is used to control the charging or discharging of the energy storage module 160, and to drive the boost module 120 according to the power outage signal. The energy storage module 160 is used to power the lamp 200 and the control module 140.

[0037] Specifically, the AC power connected to the rectifier module 110 is provided by the mains. The rectifier module 110 converts the AC power into high-voltage DC power and low-voltage DC power respectively. The high-voltage DC power converted by the rectifier module 110 is used to power the lamp 200, and the low-voltage DC power converted by the rectifier module 110 is used to power the energy storage module 160. The rectifier module 110 generates a power failure signal when the voltage of the connected AC power is zero. The control module 140 obtains the power failure signal. When there is a lighting demand, the control module 140 controls the connection between the energy storage module 160 and the DC bus according to the power failure signal, and drives the boost module 120. The boost module 120 boosts the DC power of the DC bus 150 to output the boosted DC power to the lamp 200 for use by the lamp 200. Exemplarily, the boost module 120 can be a boost chopper circuit. It should be noted that the photovoltaic module 130 is directly connected to the DC bus, and the electric energy generated by the photovoltaic module 130 is input into the DC bus 150. When the control module 140 drives the boost module 120 to power the lamp 200, the electric energy generated by the photovoltaic module 130 is also used to power the lamp 200. When the city power is normal and there is a lighting demand, the control module 140 drives the rectifier module 110 to convert the AC power into high-voltage DC power for use by the lamp 200.

[0038] The control module 140 detects the power of the energy storage module 160, and the control module 140 also obtains the maximum power point of the photovoltaic module 130. When the energy storage module 160 needs to be charged, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150, and the power required for charging the energy storage module 160 is provided by the rectifier module 110 and / or the photovoltaic module 130. When the city power is normal and the maximum power point of the photovoltaic module 130 is greater than or equal to the charging power required by the energy storage module 160, the control module 140 drives the rectifier module 110 to convert the alternating current into low-voltage direct current. At this time, the power generated by the photovoltaic module 130 and the low-voltage direct current generated by the rectifier module 110 are used to charge the energy storage module 160 through the DC bus 150. When the city power is normal and the maximum power point of the photovoltaic module 130 is less than the charging power required by the energy storage module 160, the control module 140 drives the rectifier module 110 to convert the AC power into low-voltage DC power. At this time, the low-voltage DC power generated by the rectifier module 110 charges the energy storage module 160 through the DC bus 150. When the city power is off and the maximum power point of the photovoltaic module 130 is greater than or equal to the charging power required by the energy storage module 160, the electric energy generated by the photovoltaic module 130 charges the energy storage module 160 through the DC bus 150. It should be noted that when the lamp 200 is powered by the rectifier module 110 and the energy storage module 160 has no charging demand, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150 to be disconnected.

[0039] In addition, the power supply selection of the lamp 200 may also be related to the peak power and valley power of the mains. When the mains is valley power, the control module 140 controls the rectifier module 110 to convert the AC power into high-voltage DC power to power the lamp 200. When the mains is peak power, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150, and drives the boost module 120 to boost the DC power of the DC bus 150 to power the lamp 200.

[0040] The rectifier module 110 of the embodiment of the present invention detects whether the connected AC power is normal, and generates a power failure signal when the AC power fails. The control module 140 obtains the power failure signal. When the control module 140 obtains the power failure signal, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150, and drives the boost module 120 to boost the DC power of the DC bus 150 to power the lamp 200; when the control module 140 does not obtain the power failure signal, the control module 140 drives the rectifier module 110 to convert the AC power into high-voltage DC power to power the lamp 200. The power supply device of the embodiment of the present invention stores energy through the mains or photovoltaic power during the day, and supplies power to the lamp 200 through the mains or battery at night. When the mains power fails, it can continue to supply power to the lamp 200, which is conducive to avoiding power interruption and improving power supply reliability.

[0041] Figure 2 is a schematic diagram of another power supply device provided by an embodiment of the present invention. Based on the above embodiments, optionally, refer to Figure 2 The rectifying module 110 includes: a detecting unit 111 , a rectifying unit 112 , a first commutating unit 113 and a second commutating unit 114 .

[0042] The detection unit 111 and the rectification unit 112 are connected to the AC power, the first conversion unit 113 and the second conversion unit 114 are both connected to the rectification unit 112, the first conversion unit 113 is also connected to the lamp 200 and the control module 140 respectively, the second conversion unit 140 is also connected to the DC bus 150 and the control module 140 respectively, and the detection unit 111 is also connected to the control module 140; the detection unit 111 is used to detect whether the AC power is off and generate a power off signal when the AC power is off; the rectification unit 112 is used to convert the AC power into DC power; the first conversion unit 113 is used to boost the DC power to power the lamp 200; the second conversion unit 114 is used to step down the DC power to power the energy storage module 160.

[0043] Specifically, the rectifier unit 112 converts the alternating current into direct current, the first converter unit 113 converts the direct current output by the rectifier unit 111 into high-voltage direct current, and the second converter unit 114 converts the direct current output by the rectifier unit 112 into low-voltage direct current. The high-voltage direct current converted by the first converter unit 113 is used to power the lamp 200, and the low-voltage direct current converted by the second converter unit 114 is used to power the energy storage module 160. The detection unit 111 generates a power failure signal when the voltage of the connected alternating current is zero. Exemplarily, the detection unit 111 can be a power failure detection circuit, wherein the power failure detection circuit can include an optical coupler or a relay. The control module 140 obtains the power failure signal, and when there is a lighting demand, the control module 140 controls the connection between the energy storage module 160 and the DC bus according to the power failure signal, and drives the boost module 120. The boost module 120 boosts the DC power of the DC bus 150 to output the boosted DC power to the lamp 200 for use by the lamp 200. It should be noted that the photovoltaic module 130 is directly connected to the DC bus, and the power generated by the photovoltaic module 130 is input to the DC bus 150. When the control module 140 drives the boost module 120 to power the lamp 200, the power generated by the photovoltaic module 130 is also used to power the lamp 200. When the city power is normal and there is a lighting demand, the control module 140 drives the rectifier module 110 to convert the AC power into high-voltage DC power for use by the lamp 200.

[0044] Figure 3 is a schematic diagram of another power supply device provided by an embodiment of the present invention. Based on the above embodiments, optionally, referring to Figure 3 The photovoltaic module 130 includes a photovoltaic unit 131 and a power tracking unit 132 .

[0045] The photovoltaic unit 131 is connected to the input end of the power tracking unit 132, the output end of the power tracking unit 132 is connected to the DC bus 150, and the signal output end of the power tracking unit 132 is connected to the control module 140; the photovoltaic unit 131 is used for photovoltaic power generation; the power tracking unit 132 is used to track the maximum power point of the photovoltaic unit 131; the control module 140 is also used to control the charging or discharging of the energy storage module 160 according to the maximum power point of the photovoltaic unit.

[0046] Specifically, the power tracking unit 132 tracks the maximum power point of the photovoltaic unit 131, the control module 140 detects the power of the energy storage module 160, and the control module 140 obtains the maximum power point of the photovoltaic unit 131 detected by the power tracking unit 132. When the energy storage module 160 needs to be charged, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150, and the electric energy required for charging the energy storage module 160 is provided by the rectifier module 110 and / or the photovoltaic unit 131. When the city power is normal and the maximum power point of the photovoltaic unit 131 detected by the power tracking unit 132 is greater than or equal to the charging power required by the energy storage module 160, the control module 140 drives the rectifier module 110 to convert the alternating current into low-voltage direct current. At this time, the electric energy generated by the photovoltaic unit 131 and the low-voltage direct current generated by the rectifier module 110 are used to charge the energy storage module 160 through the DC bus 150. When the city power is normal and the maximum power point of the photovoltaic unit 131 detected by the power tracking unit 132 is less than the charging power required by the energy storage module 160, the control module 140 drives the rectifier module 110 to convert the AC power into low-voltage DC power. At this time, the low-voltage DC power generated by the rectifier module 110 charges the energy storage module 160 through the DC bus 150. When the city power is off and the maximum power point of the photovoltaic unit 131 detected by the power tracking unit 132 is greater than or equal to the charging power required by the energy storage module 160, the electric energy generated by the photovoltaic unit 131 charges the energy storage module 160 through the DC bus 150. It should be noted that when the lamp 200 is powered by the rectifier module 110 and the energy storage module 160 has no charging demand, the control module 140 controls the connection between the energy storage module 160 and the DC bus 150 to be disconnected.

[0047] Figure 4 is a schematic diagram of another power supply device provided by an embodiment of the present invention. Based on the above embodiments, optionally, referring to Figure 4 The control module 140 includes: a switch unit 141 and a control unit 142 .

[0048] The first end of the switch unit 141 is connected to the DC bus 150, the second end of the switch unit 141 is connected to the energy storage module 160, the third end of the switch unit 141 is connected to the control unit 142, and the rectifier module 110, the boost module 120, the photovoltaic module 130 and the energy storage module 160 are all connected to the control unit 142; the switch unit 141 is used to control the charging or discharging of the energy storage module 160; the control unit 142 is used to drive the boost module 120 according to the power off signal, and control the conduction or closing of the switch unit 141.

[0049] Specifically, the energy storage module 160 is connected to the DC bus 150 through the switch unit 141. When the switch unit 141 is closed, the connection between the energy storage module 160 and the DC bus 150 is turned on, and the energy storage module 160 is charged or supplies power to the lamp 200; when the switch unit 141 is turned off, the connection between the energy storage module 160 and the DC bus 150 is turned off, and the energy storage module 160 only supplies power to the control unit 141. Among them, the switch unit 141 may include a switch tube. Exemplarily, the control process of the control unit 142 on the switch unit 141 can be that the control unit 142 generates a closing signal, the switch unit 141 obtains the closing signal and acts to conduct the connection between the energy storage module 160 and the DC bus 150; the control unit 142 generates a shutoff signal, the switch unit 141 obtains the shutoff signal and acts to shut off the connection between the energy storage module 160 and the DC bus 150.

[0050] Based on the above embodiments, optionally, the energy storage module 160 includes: at least one battery cell; the positive electrode of the battery cell and the negative electrode of the battery cell are both connected to the DC bus 150. That is, when the energy storage module 160 has multiple battery cells, the battery cells in the energy storage module 160 are connected in parallel with each other. Exemplarily, the battery cells in the energy storage module 160 can be lithium-ion battery cells or sodium-ion battery cells.

[0051] Figure 5 is a schematic diagram of another power supply device provided by an embodiment of the present invention. Based on the above embodiments, optionally, referring to Figure 5 The power supply device further includes: a communication module 170. The communication module 170 is connected to the control module 140; the communication module 170 is used for data interaction. Specifically, the communication module 170 can interact with the server or the user terminal for data, so that the user can understand the operation of the power supply device, and the user can also control the operation of the power supply device through the communication module 170.

[0052] An embodiment of the present invention further provides a lighting system. Figure 6 is a schematic diagram of a lighting system provided by an embodiment of the present invention. Figure 6 The lighting system 10 includes: a lamp 200 and a power supply device 100 provided in any of the above embodiments. It should be noted that the lighting system 10 provided in this embodiment has the beneficial effects of the power supply device 100 provided in any of the above embodiments, which will not be described in detail here.

[0053] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0054] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply device, characterized in that: include: Rectifier module, boost module, photovoltaic module, control module, DC bus and energy storage module; The rectifier module, the boost module, the photovoltaic module and the control module are all connected to the DC bus, the rectifier module is connected to the AC power, the rectifier module is also connected to the lamp, and the boost module is also connected to the lamp; the control module is respectively connected to the rectifier module, the boost module, the photovoltaic module and the energy storage module; The rectifier module is used to convert AC power into DC power to power the lamp and / or the energy storage module, and to generate a power outage signal when the AC power is off; the boost module is used to boost the voltage of the DC bus to power the lamp; the photovoltaic module is used for photovoltaic power generation; the control module is used to control the charging or discharging of the energy storage module, and to drive the boost module according to the power outage signal; the energy storage module is used to power the lamp and the control module.

2. The power supply device according to claim 1, characterized in that: The rectifier module comprises: a detection unit, a rectifier unit, a first commutation unit and a second commutation unit; The detection unit and the rectification unit are connected to the alternating current, the first commutation unit and the second commutation unit are both connected to the commutation unit, the first commutation unit is also connected to the lamp and the control module respectively, the second commutation unit is also connected to the DC bus and the control module respectively, and the detection unit is also connected to the control module; The rectifying unit is used to convert alternating current into direct current; the first commutating unit is used to boost the direct current to power the lamp; the second commutating unit is used to step down the direct current to power the energy storage module; the detecting unit is used to detect whether the alternating current is out of power and generate a power outage signal when the alternating current is out of power.

3. The power supply device according to claim 2, characterized in that: The detection unit comprises: a power failure detection circuit.

4. The power supply device according to claim 1, characterized in that: The photovoltaic module comprises: a photovoltaic unit and a power tracking unit; The photovoltaic unit is connected to the input end of the power tracking unit, the output end of the power tracking unit is connected to the DC bus, and the signal output end of the power tracking unit is connected to the control module; The photovoltaic unit is used for photovoltaic power generation; the power tracking unit is used to track the maximum power point of the photovoltaic unit; and the control module is also used to control the charging or discharging of the energy storage module according to the maximum power point of the photovoltaic unit.

5. The power supply device according to claim 1, characterized in that: The control module comprises: a switch unit and a control unit; The first end of the switch unit is connected to the DC bus, the second end of the switch unit is connected to the energy storage module, the third end of the switch unit is connected to the control unit, and the rectifier module, the boost module, the photovoltaic module and the energy storage module are all connected to the control unit; The switch unit is used to control the charging or discharging of the energy storage module; the control unit is used to drive the boost module according to the power failure signal, and control the on or off of the switch unit.

6. The power supply device according to claim 1, characterized in that: The energy storage module includes: at least one battery cell; the positive electrode of the battery cell and the negative electrode of the battery cell are both connected to the DC bus.

7. The power supply device according to claim 6, characterized in that: The battery cell is a lithium ion battery cell or a sodium ion battery cell.

8. The power supply device according to claim 1, characterized in that: The boost module includes a boost chopper circuit.

9. The power supply device according to claim 1, characterized in that: Also includes: Communication module; The communication module is connected to the control module; the communication module is used for data exchange.

10. A lighting system, characterized in that: include: A lamp and a power supply device as claimed in any one of claims 1 to 9.

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