Photovoltaic priority type charging pile

Abstract

A high-voltage direct-current power supply generated by a photovoltaic array FV is characterized in that one loop is electrically connected with a storage battery pack GB1 through a storage battery charging control Q1 and charges the storage battery pack GB1, and the other loop is electrically connected with a bus isolation device D1 and a direct-current bus switching unit Q3 and then provides a direct-current power supply for the charging pile. The output of the storage battery GB1 is electrically connected with the storage battery switching unit Q2, the direct current bus switching unit Q3 provides a direct current power supply for the charging pile, and a 10KV power grid is connected with the alternating current bus switching unit K1 through the isolation step-down transformer T1 to provide an alternating current power supply for the charging pile. A photovoltaic array power supply serves as a first power supply, a storage battery pack serves as a second power supply, a power grid power supply serves as a third power supply, reliable power supplies are provided for the charging pile, the first power supply is prior to the second power supply, the second power supply is prior to the third power supply, the problem of environmental pollution caused by the fact that a power grid provides a charging power supply in the prior art is solved, and the power supplies are green, clean and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy charging, and in particular to a photovoltaic priority charging pile, which provides green, clean and environmentally friendly power supply. Background Art

[0002] Charging pile is a kind of energy replenishment device that provides electric vehicles with electricity. Its function is similar to the gas pump in the gas station. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging electric vehicles. Charging piles generally provide two charging methods: conventional charging and fast charging. People can use a specific charging card to swipe the card on the human-machine interactive operation interface provided by the charging pile to perform corresponding charging operations and print cost data. The charging pile display can display data such as charging amount, cost, and charging time. At present, the power of the charging pile comes from the power grid, and the power of the power grid mainly comes from coal-based thermal power generation. In this way, electric-driven vehicles only transfer the consumption of fossil energy from cars to coal-based power generation, which cannot fundamentally solve the energy and environmental pollution problems; in addition, with the development and improvement of smart grids, the role of "peak shaving and valley filling" of electric-driven vehicles through intelligent charging control is inseparable from renewable energy. Solar photovoltaic power generation is a hot issue that the society is very concerned about now, and electric vehicles themselves have been included in my country's development plan. How to organically integrate distributed photovoltaic and electric vehicle charging facilities and achieve synergy and efficiency through optimized configuration and operation has become very important. There is an urgent need for a charging power source that can provide green, clean, environmentally friendly and reliable. Summary of the invention

[0003] The purpose of the utility model is to overcome the technical defects such as environmental pollution existing in the above-mentioned prior art charging power supply for new energy vehicles, and to provide a photovoltaic priority charging pile, thereby providing a green, clean, environmentally friendly and reliable charging power supply.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a photovoltaic priority charging pile, a high-voltage DC power supply generated by a photovoltaic array FV, one circuit is electrically connected to the battery group GB1 through the battery charging control Q1 to charge the battery group GB1, and the other circuit is electrically connected to the bus isolation device D1 and the DC bus cutting unit Q3 to provide DC power for the charging pile, the output of the battery group GB1 is electrically connected to the battery group switching unit Q2, the DC bus cutting unit Q3 provides DC power for the charging pile, and the 10KV power grid is connected to the AC bus switching unit K1 through the isolation step-down transformer T1 to provide AC power for the charging pile.

[0005] Preferably, the battery charging control Q1, the battery pack switching unit Q2, the DC bus switching unit Q3, and the AC bus switching unit K1 are switched by controlling the power controller P-KZ.

[0006] Preferably, the charging pile further includes a billing control system, and the billing control system performs data communication with the electric vehicle to control the working state of the charging pile.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the utility model uses the photovoltaic array power supply as the first power supply, the battery pack as the second power supply, and the grid power supply as the third power supply to provide a reliable power supply for the charging pile. The first power supply takes precedence over the second power supply, and the second power supply takes precedence over the third power supply. This solves the problem of environmental pollution in the prior art of the grid providing charging power supply, and is a green, clean, and environmentally friendly power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of a photovoltaic priority charging pile system of the utility model. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0010] The purpose of the utility model is to overcome the technical defects such as environmental pollution existing in the above-mentioned prior art charging power supply for new energy vehicles, and to provide a photovoltaic priority charging pile, thereby providing a green, clean, environmentally friendly and reliable charging power supply.

[0011] like Figure 1As shown, a photovoltaic priority charging pile includes: a photovoltaic array FV, a battery charging control Q1, a battery group GB1, a busbar isolating device D1, a battery group switching unit Q2, a DC busbar cutting unit Q3, an isolation step-down transformer T1, an AC busbar switching unit K1, a power controller P-KZ, a charging pile, and a charging control system. The high-voltage DC power generated by the photovoltaic array FV, one circuit is electrically connected to the battery group GB1 through the battery charging control Q1 to charge the battery group GB1, and the other circuit is electrically connected to the busbar isolating device D1 and the DC busbar cutting unit Q3 to provide a DC power supply for the charging pile. The output of the battery group GB1 is electrically connected to the battery group switching unit Q2, and the DC busbar cutting unit Q3 provides a DC power supply for the charging pile. The 10KV power grid is connected to the AC busbar switching unit K1 through the isolation step-down transformer T1 to provide an AC power supply for the charging pile. The battery charging control Q1, the battery pack switching unit Q2, the DC bus switching unit Q3, and the AC bus switching unit K1 are switched by the power controller P-KZ. The charging pile also includes a billing control system, which communicates data with the electric vehicle to control the working state of the charging pile.

[0012] The specific working principle is as follows: the photovoltaic array FV generates high-voltage DC power, one circuit passes through the battery charging control Q1 to charge the battery group GB1, and the other circuit passes through the bus isolation device D1 and the DC bus cutting unit Q3 to provide DC power for the charging pile to charge the electric vehicle; when the capacity of the high-voltage DC power generated by the photovoltaic array FV is insufficient, the battery group GB1 provides DC power to the charging pile through the battery group switching unit Q2 and the DC bus cutting unit Q3 to charge the electric vehicle; when the capacity of the high-voltage DC power generated by the photovoltaic array FV is insufficient and the battery group GB1 is under low voltage protection, the DC bus cutting unit Q3 is turned off and the AC bus switching unit K1 is turned on, and the 10KV power grid provides AC power to the charging pile through the transformer T1 to charge the electric vehicle; the above switching function is controlled by the power controller P-KZ. The billing control system communicates data with the electric vehicle to control the working status of the charging pile.

[0013] The utility model uses a photovoltaic array power supply as a first power supply, a battery pack as a second power supply, and a grid power supply as a third power supply to provide a reliable power supply for a charging pile. The first power supply takes precedence over the second power supply, and the second power supply takes precedence over the third power supply. This solves the problem of welcome pollution in the prior art grid-provided charging power supply, and is a green, clean, and environmentally friendly power supply.

[0014] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A photovoltaic priority charging pile, characterized by: The high-voltage DC power generated by the photovoltaic array FV has one circuit electrically connected to the battery group GB1 through the battery charging control Q1 to charge the battery group GB1, and the other circuit electrically connected to the bus isolation device D1 and the DC bus cutting unit Q3 to provide DC power for the charging pile. The output of the battery group GB1 is electrically connected to the battery group switching unit Q2, and the DC bus cutting unit Q3 provides DC power for the charging pile. The 10KV power grid is connected to the AC bus switching unit K1 through the isolation step-down transformer T1 to provide AC power for the charging pile.

2. A photovoltaic priority charging pile according to claim 1, characterized in that: The battery charging control Q1, the battery group switching unit Q2, the DC bus switching unit Q3, and the AC bus switching unit K1 are switched by the power controller P-KZ.

3. A photovoltaic priority charging pile according to claim 1, characterized in that: The charging pile also includes a charging control system, which performs data communication with the electric vehicle to control the working state of the charging pile.

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