Light storage charging and discharging integrated charging pile

Abstract

The utility model relates to the technical field of charging piles, in particular to a light storage charging and discharging integrated charging pile. The system comprises a photovoltaic power generation module, an energy storage module, a charging module and a control module, and a second power conversion module in the energy storage module and a third power conversion module in the charging module are both bidirectional DC / DC conversion modules, that is, on the basis of a traditional photovoltaic power generation system, an energy storage device and a charging station, the photovoltaic power generation system, the energy storage device and the charging station are integrated. A reverse charging function of the charging station is added, and the electric vehicle in a stop state can be used as a mobile energy storage device, so that power is supplied to the energy storage module or reverse power is supplied to the power grid, and a scheme which is richer, wider in application scene and capable of balancing peak and valley loads of the power grid is provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging pile technical field, concretely relates to a light storage and charge integrated charging pile. BACKGROUND

[0002] With the development and popularization of new energy vehicles, the corresponding charging demand is also increasing, the current charging pile quantity cannot satisfy the demand, but if the charging pile quantity is increased on a large scale, the power grid pressure will be increased, and the original line needs to be reconstructed, which will further increase the cost, therefore, establishing a good charging system will be beneficial to the popularization and market promotion of new energy vehicles.

[0003] The light storage and charge integrated system is a solution to the above problems, the current light storage and charge integrated system includes a photovoltaic power generation system, an energy storage device and a charging station three parts, and is a small self-sufficient power supply system, which can also be called a microgrid, but its function only involves photovoltaic power generation, and the excess electricity generated is stored in the energy storage device to undertake power supply and charging tasks. But it does not involve a more abundant solution to balance the peak and valley load of the power grid. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the above problems in the prior art, thereby providing a light storage and charge integrated charging pile.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a light storage and charge integrated charging pile, which comprises: a photovoltaic power generation module, the photovoltaic power generation module has a photovoltaic assembly, a busbar box and a first power conversion module; an energy storage module, the energy storage module has a battery pack, a battery control system and a second power conversion module; a charging module, the charging module has a charging gun, a charging control system and a third power conversion module; a control module, the control module is connected with the busbar box, the battery control system and the charging control system in communication; the photovoltaic power generation module, the energy storage battery module and the charging module are connected through a direct current bus, and the second power conversion module and the third power conversion module are both bidirectional DC / DC conversion modules.

[0007] Optionally, the first power conversion module of the light storage and charge integrated charging pile provided by the utility model is a unidirectional DC / DC conversion module.

[0008] Optionally, the direct current bus of the light storage and charge integrated charging pile provided by the utility model is a direct current 750Vdc bus.

[0009] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model has multiple charging guns, and the charging gun has a direct current charging interface.

[0010] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model is also connected to a power grid, and the power grid is connected to the direct current bus through a bidirectional AC / DC conversion module.

[0011] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model is not connected to a power grid, and the light storage charging and discharging integrated charging pile constitutes a single micro power grid.

[0012] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model has an energy storage module, and the energy storage module comprises an energy storage battery compartment.

[0013] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model further comprises a fire extinguishing device, and the fire extinguishing device is a perfluorohexanone fire extinguishing device, which is arranged in the energy storage battery compartment.

[0014] Alternatively, the light storage charging and discharging integrated charging pile provided by the utility model has a control module, and the control module is connected to the busbar, the battery control system and the charging control system through a CAN bus.

[0015] The utility model technical scheme has the following advantages:

[0016] 1. The light storage charging and discharging integrated charging pile provided by the utility model comprises a photovoltaic power generation module, an energy storage module, a charging module and a control module, wherein the second power conversion module in the energy storage module and the third power conversion module in the charging module are bidirectional DC / DC conversion modules, that is, on the basis of a traditional light storage charging integrated system comprising a photovoltaic power generation system, an energy storage device and a charging station, the reverse charging function of the charging station is increased, the electric vehicle in a stop state can be regarded as a mobile energy storage device, thereby supplying power to the energy storage module or supplying power to the power grid in reverse, thereby providing a more abundant solution, which is more widely applied and can balance the peak and valley load of the power grid.

[0017] 2. The light storage charging and discharging integrated charging pile provided by the utility model can be not connected to a power grid, the light storage charging and discharging integrated charging pile can constitute a single micro power grid, renewable energy can be fully utilized, and the charging station can be supplemented with energy in reverse, thereby forming a perfect and recyclable micro power grid system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Fig. 1 The structure diagram of the light storage and charging integrated charging pile system provided in the embodiment of the present application is provided.

[0020] Fig. 2 The bidirectional charging and discharging schematic diagram of the charging module provided in the embodiment of the present application is provided.

[0021] Explanation of reference signs:

[0022] 1-1 photovoltaic module, 1-2 combiner box, 1-3 first power conversion module, 2-1 battery pack, 2-2 energy storage battery compartment, 2-3 battery control system, 2-4 second power conversion module, 3-1 charging gun, 3-2 charging control system, 3-3 third power conversion module, 4 control module, 5 DC bus, 6 electric vehicle. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0026] Embodiment 1

[0027] As Figs. 1-2As shown, the embodiment provides a light storage charging and discharging integrated charging pile, which comprises a photovoltaic power generation module, an energy storage module, a charging module and a control module, wherein the photovoltaic power generation module, the energy storage module and the charging module are all connected to an alternating current bus 5.

[0028] The photovoltaic power generation module has a photovoltaic assembly 1-1, a combiner box 1-2 and a first power conversion module 1-3, wherein the first power conversion module 1-3 is a unidirectional DC / DC conversion module; the photovoltaic assembly 1-1, the combiner box 1-2 and the first power conversion module 1-3 are connected in sequence, the combiner box 1-2 can connect photovoltaic cells in series to form a photovoltaic string, and then connect several photovoltaic strings in parallel into the combiner box for current collection, thereby ensuring the ordered connection and current collection function of the photovoltaic assembly, and connecting to the alternating current bus 5 through the unidirectional DC / DC conversion module.

[0029] The energy storage module has a battery pack 2-1, a battery control system 2-3 and a second power conversion module 2-4, wherein the battery pack in the energy storage module can be placed in an energy storage battery compartment 2-2, the battery control system is a BCU master control module, the second power conversion module 2-4 is a bidirectional DC / DC conversion module, and the battery pack 2-1 can supply power to or receive power from the direct current bus side through the bidirectional DC / DC conversion module.

[0030] The charging module has a charging gun 3-1, a charging control system 3-2 and a third power conversion module 3-3, the third power conversion module 3-3 is a bidirectional DC / DC conversion module, the charging gun has a plurality of charging guns, the charging gun has a direct current charging interface, which can charge the electric vehicle 6 through the direct current charging interface; the charging gun 3-1 is connected to the direct current bus 5 through the bidirectional DC / DC conversion module, so that the electric vehicle can be connected to the micro-grid through the V2G (Vehicle-to-Grid) technology, and the energy storage of the electric vehicle can be used as a buffer for the micro-grid and renewable energy; the control module is in communication connection with the combiner box 1-2, the battery control system 2-3 and the charging control system 3-2, and is used for unified coordination control among the photovoltaic power generation module, the energy storage module and the charging module.

[0031] The photovoltaic storage charging and discharging integrated charging pile provided by the embodiment comprises a photovoltaic power generation module, an energy storage module, a charging module and a control module, wherein the second power conversion module in the energy storage module and the third power conversion module in the charging module are both bidirectional DC / DC conversion modules, that is, on the basis of the traditional photovoltaic storage charging integrated system comprising a photovoltaic power generation system, an energy storage device and a charging station, the reverse charging function of the charging station is added, the electric vehicle in the idle state can be regarded as a mobile energy storage device, thereby supplying power for the energy storage module or supplying power reversely for the power grid, thereby providing a more abundant scheme, which is more widely applied and can balance the peak and valley load of the power grid.

[0032] The direct current bus power supply mode adopted by the embodiment avoids multiple conversion and transformation of alternating current in the transmission process, reduces energy loss, improves energy utilization efficiency, and further, the direct current bus can be selected as a direct current 750Vdc bus, the voltage and current output of which are stable, which can ensure the normal operation of the equipment and the accuracy of the data.

[0033] Alternatively, the photovoltaic storage charging and discharging integrated charging pile provided by the embodiment can also be connected to the power grid, and the power grid is connected to the direct current bus through a bidirectional AC / DC conversion module. In this way, the energy storage capacity of the photovoltaic storage charging and discharging integrated charging pile and the electric vehicle can be fully utilized, and the supply and demand contradiction of the power grid can be effectively alleviated.

[0034] Through the application of V2G technology, the electric vehicle and the energy storage module of the photovoltaic storage charging and discharging integrated charging pile coordinate with each other to form a distributed energy storage unit, which can charge when the power grid load is low and the electricity price is low, store excess energy, and discharge to the power grid through the vehicle or the energy storage module when the power grid load is high, thereby realizing energy feedback. This technology fully utilizes the energy storage capacity of the electric vehicle and the energy storage module, effectively alleviates the supply and demand contradiction of the power grid, improves the energy utilization efficiency, and helps to smooth the fluctuation of renewable energy and ensure the stability of the power grid frequency.

[0035] Alternatively, the photovoltaic storage charging and discharging integrated charging pile provided by the embodiment further comprises a fire extinguishing device, which is a perfluorohexone fire extinguishing device, which is arranged in the energy storage battery compartment and can efficiently complete the fire extinguishing task and improve the system safety.

[0036] Alternatively, the photovoltaic storage charging and discharging integrated charging pile provided by the embodiment comprises a control module, which is connected to the bus duct, the battery control system and the charging control system through a CAN bus.

[0037] Embodiment 2

[0038] The embodiment provides a light storage charging and discharging integrated charging pile, and the structure of the charging pile is the same as that of the light storage charging and discharging integrated charging pile in the embodiment 1, which will not be repeated here. The light storage charging and discharging integrated charging pile provided by the embodiment is not connected with a power grid, the light storage charging and discharging integrated charging pile constitutes a single micro-grid, renewable energy can be fully utilized, and the micro-grid can be supplemented with energy through reverse charging of the electric vehicle of the charging station, so that a perfect and recyclable micro-grid system is formed.

[0039] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A light storage, charging and discharging integrated charging pile, characterized in that, Comprise: Photovoltaic power generation module, the photovoltaic power generation module has photovoltaic assembly, the confluence box and the first power conversion module; Energy storage module, the energy storage module has battery pack, battery control system and the second power conversion module; Charging module, the charging module has charging gun, charging control system and the third power conversion module; Control module, the control module is connected with the confluence box, battery control system and charging control system respectively; The photovoltaic power generation module, energy storage battery module and charging module are connected through DC bus, and the second power conversion module and the third power conversion module are both bidirectional DC / DC conversion module.

2. The optical storage, charging and discharging integrated charging pile according to claim 1, characterized in that, The first power conversion module is unidirectional DC / DC conversion module.

3. The optical storage, charging and discharging integrated charging pile according to claim 2, characterized in that, The DC bus is DC 750Vdc bus.

4. The optical storage, charging and discharging integrated charging pile according to claim 3, characterized in that, The charging gun has multiple, and the charging gun has DC charging interface.

5. The optical storage, charging and discharging integrated charging pile according to claim 3, characterized in that, The light storage charging and discharging integrated charging pile is connected with power grid, and the power grid is connected with the DC bus through bidirectional AC / DC conversion module.

6. The optical storage, charging and discharging integrated charging pile according to claim 3, characterized in that, The light storage charging and discharging integrated charging pile is not connected with power grid, and the light storage charging and discharging integrated charging pile is a single microgrid.

7. The optical storage, charging and discharging integrated charging pile according to claim 6, characterized in that, The energy storage module includes energy storage battery compartment, and the battery pack is arranged in the energy storage battery compartment.

8. The optical storage, charging and discharging integrated charging pile according to claim 7, characterized in that, It also includes fire extinguishing device, the fire extinguishing device is perfluorohexanone fire extinguishing device, which is arranged in the energy storage battery compartment.

9. The optical storage, charging and discharging integrated charging pile according to claim 8, characterized in that, The control module is connected with the confluence box, battery control system and charging control system through CAN bus respectively.

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