A novel DC power supply device

Abstract

This utility model relates to the field of DC power supply technology, specifically a novel DC power supply device, including a distribution box. The distribution box houses a PLC programmable controller, a 750V-400V DC step-down converter, and an active protection control device. The active protection control device is connected to an external lighting system and charging pile. The distribution box also contains an AC / DC converter. The signal interface of the AC / DC converter is connected to the PLC programmable controller, and the interface of the 750V-400V DC step-down converter is also connected to the PLC programmable controller. The DC power output from the AC / DC converter is supplied to the charging pile or lighting system via the PLC programmable controller and the 750V-400V DC step-down converter. This utility model centralizes the AC / DC converters of the DC lighting system streetlights inside the distribution box, allowing the charging pile and lighting system to share a single AC / DC converter. This eliminates the need for separate AC / DC converters for the charging piles, enabling switching power supply between the lighting system and the charging piles, thus improving the efficiency of the DC power supply device.

Description

Technical Field

[0001] This utility model relates to the field of DC power supply technology, specifically a novel DC power supply device. Background Technology

[0002] With the increasing popularity of new energy vehicles, charging stations for new energy vehicles are often set up in urban communities or along roadsides. Each charging station needs to be equipped with a distribution box for power distribution. Each distribution box needs to be equipped with an AC / DC converter and a dedicated battery energy storage system, which makes the structure of the distribution box complex and the cost of the distribution box high.

[0003] Currently, LED streetlights are becoming increasingly popular both domestically and internationally. With the development and advancement of LED streetlight technology, more and more streetlights are adopting integrated designs, which provides a feasible basis for miniaturizing the streetlight driver control power supply. LED streetlights use DC power, so when LED streetlights are connected to the AC power grid, a driver circuit needs to be set up to convert the AC power into DC power usable by the LED lights. Each LED lighting lamp's driver circuit is equipped with an AC / DC converter, which provides DC power to the LED lighting lamp. Each LED streetlight has a separate driver power supply and converter installed at the bottom.

[0004] To address this, a novel DC power supply device is proposed, which includes an AC / DC converter for the lighting system installed in a distribution box. The charging pile is also connected to the AC / DC converter, and the charging pile and the lighting system share the same AC / DC converter. Utility Model Content

[0005] The purpose of this utility model is to provide a novel DC power supply device, which includes an AC / DC converter for use by a lighting system installed in a distribution box. The charging pile is also connected to the AC / DC converter, and the charging pile and the lighting system share a single AC / DC converter, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel DC power supply device includes a distribution box, which houses a PLC programmable controller, a 750V-400V DC step-down converter, and an active protection control device. The active protection control device is connected to an external lighting system and a charging pile. The distribution box also houses an AC / DC converter, whose signal interface is connected to the PLC programmable controller. The interface of the 750V-400V DC step-down converter is also connected to the PLC programmable controller. The DC power output from the AC / DC converter supplies power to the charging pile or lighting system via the PLC programmable controller and the 750V-400V DC step-down converter.

[0008] The active protection control device uses an overload protection circuit, and the AC / DC input interface is connected to the mains power grid via a wire.

[0009] The lighting system includes commonly used LED DC streetlights and also includes matching solar streetlights. Each DC streetlight is equipped with a DC circuit control.

[0010] The distribution box is also equipped with a DC intelligent circuit breaker. One end of the DC intelligent circuit breaker is connected to the photovoltaic power generation system, and the other end is connected to a PLC programmable controller. The photovoltaic power generation system can be a photovoltaic power plant or photovoltaic panels on solar streetlights.

[0011] The distribution box is also equipped with a second DC intelligent circuit breaker, one end of which is connected to an external energy storage system via a wire. The energy storage system can be an energy storage system consisting of lead-acid batteries or lithium batteries and their control devices.

[0012] Preferably, the charging pile includes electric vehicle charging piles and electric bicycle charging piles, and both the electric bicycle charging piles and the electric vehicle charging piles are connected to the PLC programmable controller in the distribution box via wires.

[0013] The charging piles include electric vehicle charging piles and electric bicycle charging piles, and the lighting system includes streetlights and other lighting fixtures.

[0014] The PLC programmable control interface is also connected to a DC power distribution bus. One interface of the AC / DC converter is connected to the DC power distribution bus. The power distribution interfaces of the DC intelligent circuit breaker one and the DC intelligent circuit breaker two are both connected to the DC power distribution bus. One end of the 750V-400V DC step-down converter is also connected to the DC power distribution bus.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The AC / DC converters for the streetlights in the DC lighting system are centrally located inside the distribution box, allowing the charging piles and the lighting system to share a single AC / DC converter. This eliminates the need for separate AC / DC converters for the charging piles, and allows for switching between the power supply states of the lighting system and the charging piles, thereby improving the efficiency of the DC power supply system.

[0017] By connecting to photovoltaic power generation and battery energy storage systems, priority is given to powering lighting at night, and during the day when the lighting system is not working, the power supply switches to the charging pile line. This makes full use of the lighting facilities to serve the charging pile, improves the utilization rate of lighting equipment, saves investment, and helps alleviate the problem of charging difficulties. Attached Figure Description

[0018] Figure 1 Here is the wiring diagram;

[0019] Figure 2 External layout of the power distribution box and charging pile.

[0020] In the diagram: 1. PLC programmable controller; 2. AC / DC converter; 3. Active protection control device; 4. DC power distribution bus; 5. DC intelligent circuit breaker one; 6. Energy storage system; 7. DC intelligent circuit breaker two; 8. Electric bicycle charging station; 9. Lighting system; 10. Electric vehicle charging station. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 2 This utility model provides a novel DC power supply device, which is installed in residential areas or by the roadside. Example 1

[0023] The photovoltaic power generation system is connected to the PLC programmable controller 1 through a DC intelligent circuit breaker. After being configured by the PLC programmable controller 1, it forms a line connection with the 750V-400V DC step-down transformer. The DC power generated by the photovoltaic power generation flows through the 750V-400V DC step-down transformer and the active protection control device 3 to supply power to the charging pile or lighting system 9.

[0024] The photovoltaic power generation system has its own energy storage battery, which supplies power to the charging pile or lighting system 9. Example 2

[0025] The AC / DC converter 2 is connected to the power grid, and another interface is connected to the PLC programmable controller 1. The distribution box is also equipped with a 750V-400V DC step-down converter, which is connected to the active protection control device 3. Electrical energy is supplied to the DC lighting system 9 or the charging pile through the 750V-400V DC step-down converter and the active protection control device 3.

[0026] The PLC programmable controller 1 controls the active protection control device 3 to be electrically connected to the AC / DC converter 2, and directly supplies power to the charging pile or lighting system 9 through the power grid.

[0027] At night, priority is given to powering the lighting system. During the day, when the lighting system is not working, the power is switched to the charging station line. This makes full use of the lighting facilities to serve the charging station, improves the utilization rate of the lighting equipment, saves investment, and helps alleviate the problem of charging difficulties. Example 3

[0028] A DC intelligent circuit breaker 5 is also provided, which is connected to the photovoltaic power generation system. When the PLC programmable controller 1 controls both the DC intelligent circuit breaker 5 and the DC intelligent circuit breaker 7 to close, the photovoltaic power generation system charges the energy storage system 6. When the energy storage system 6 is fully charged, the DC intelligent circuit breaker 5 opens, and the PLC programmable controller 1 connects the DC intelligent circuit breaker 7 to the 750V-400V DC step-down transformer, so that the energy storage system 6 provides DC power to the charging pile or lighting system 9.

[0029] At night, priority is given to powering the lighting system. The programmable DC lighting system 9 is connected to the energy storage system 6, and the energy storage system 6 supplies power to the lighting system 9.

[0030] When the daytime lighting system 9 is not working, the PLC programmable controller 1 controls the active protection control device 3 to switch the line to the charging pile, enabling the charging pile to start charging and provide power for charging electric vehicles or electric bicycles. This can make full use of the lighting facilities to serve the charging pile, improve the utilization rate of lighting equipment, save investment, and help alleviate the problem of charging difficulties.

[0031] When the photovoltaic power generation system has no power supply, the PLC programmable controller 1 disconnects the DC smart circuit breaker 5 and connects the circuit between the AC / DC converter 2 and the DC smart circuit breaker 7, so that the AC power from the grid is converted into DC power to charge the energy storage system 6.

[0032] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power via transformers. The main controller can be a conventional known device such as a computer for control. The product model provided in this utility model is only for use based on the structural features of the product in this technical solution. The product will be adjusted and modified after purchase to better match and conform to the technical solution of this utility model. It is an optimal application of this technical solution. The product model can be replaced and modified according to the required technical parameters. It is well known to those skilled in the art. Therefore, those skilled in the art can clearly obtain the corresponding usage effect through the technical solution provided by this utility model.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel DC power supply device, characterized by: The system includes a distribution box, which contains a PLC programmable controller (1), a 750V-400V DC step-down converter, and an active protection control device (3). The active protection control device (3) is connected to an external lighting system (9) and a charging pile. The distribution box also contains an AC / DC converter (2). The signal interface of the AC / DC converter (2) is connected to the PLC programmable controller (1), and the interface of the 750V-400V DC step-down converter is connected to the PLC programmable controller (1). The DC power output by the AC / DC converter (2) is supplied to the charging pile or lighting system (9) via the PLC programmable controller (1) and the 750V-400V DC step-down converter.

2. A novel DC power supply device according to claim 1, characterized by: The distribution box is also equipped with a DC intelligent circuit breaker (5). One end of the DC intelligent circuit breaker (5) is connected to the photovoltaic power generation system, and the other end of the DC intelligent circuit breaker (5) is connected to the PLC programmable controller (1).

3. A novel DC power supply device according to claim 2, characterized in that: The distribution box is also equipped with a second DC intelligent circuit breaker (7), one end of which is connected to an external energy storage system (6) via a wire.

4. A novel DC power supply device according to claim 3, characterized in that: The charging piles include electric vehicle charging piles (10) and electric bicycle charging piles (8), and the lighting system (9) includes streetlights and other lighting fixtures.

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