Wall-mounted direct current charging pile

Abstract

The utility model discloses a wall-mounted direct current charging pile, and relates to the technical field of charging equipment. The wall-mounted direct-current charging pile comprises a direct-current charging pile shell; the interior of the direct-current charging pile shell is of a double-layer structure, the double-layer structure comprises a first cavity and a second cavity which are independent from each other, an electrical assembly is installed in the first cavity, and a plurality of electric energy conversion modules are vertically installed in the second cavity; an air inlet is formed in the bottom of the direct-current charging pile shell, and air outlets are formed in the upper portions of the left side and the right side of the direct-current charging pile shell; a plurality of direct current charging gun output ports are formed in the bottom end face of the direct current charging pile machine shell, and each direct current charging gun cable is electrically connected with at least one of the electric energy conversion modules through one of the direct current charging gun output ports. The wall-mounted direct-current charging pile can reduce the size of equipment, reduces the manufacturing cost, and is convenient to install.

Description

Technical Field

[0001] The present application relates to the technical field of charging devices, and more specifically, to a wall-mounted DC charging pile. Background Art

[0002] A charging pile is a device that provides electrical energy for electric vehicles. The charging pile can charge various types of electric vehicles according to different voltage levels. 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. The charging piles are mainly divided into two types: AC charging piles and DC charging piles. The DC charging pile provides direct current, and the adjustable output range can meet the fast charging requirements of different-capacity storage batteries, and can automatically perform dynamic adjustment according to the type of battery to achieve fast, efficient, and safe charging of the battery.

[0003] However, the power conversion module of the existing wall-mounted DC charging pile is horizontally placed. In order to dissipate heat, air inlets and outlets need to be arranged on the left and right sides, resulting in a large volume, high manufacturing cost, and inconvenient installation. Therefore, how to reduce the volume of the wall-mounted DC charging pile and lower the manufacturing cost has become an urgent technical problem in this field. Summary of the Utility Model

[0004] In view of this, the embodiments of the present application are committed to providing a wall-mounted DC charging pile to solve the problems of large volume, high manufacturing cost, and inconvenient installation existing in the current wall-mounted DC charging piles.

[0005] In a first aspect, this specification provides a wall-mounted DC charging pile, including:

[0006] A DC charging pile housing;

[0007] The interior of the DC charging pile housing is a double-layer structure, and the double-layer structure includes an independent first cavity and a second cavity. Among them, electrical components are installed in the first cavity, and multiple power conversion modules are vertically installed in the second cavity;

[0008] An air inlet is arranged at the bottom of the DC charging pile housing, and air outlets are arranged above the left and right sides of the DC charging pile housing;

[0009] A plurality of DC charging gun output ports are arranged on the bottom end face of the DC charging pile housing, and each DC charging gun cable is electrically connected to at least one of the multiple power conversion modules through one of the multiple DC charging gun output ports respectively.

[0010] According to the first aspect, in a possible implementation manner, an air inlet cover plate with a dust filter is arranged on the bottom end face of the DC charging pile housing. A plurality of mesh holes are further arranged on the air inlet cover plate, and a fan for exhausting external air is installed in the air outlet.

[0011] According to a first aspect, in a possible implementation, the electrical component includes an AC leakage protection switch, a plurality of copper bars, an AC lightning arrester, a plurality of auxiliary power supplies, an access control switch, a charging gun monitoring board, a DC watt-hour meter, a plurality of fuses, a plurality of shunt resistors, and a plurality of DC contactors.

[0012] According to a first aspect, in a possible implementation, the bottom end face of the DC charging pile housing is provided with an AC input port, and charging gun insertion ports are provided below both the left and right sides of the DC charging pile housing.

[0013] According to a first aspect, in a possible implementation, the DC charging pile housing is a waterproof sheet metal, an AC cable waterproof joint is installed at the AC input port, and a plurality of charging gun cable waterproof joints are installed at a plurality of DC charging gun output ports.

[0014] According to a first aspect, in a possible implementation, an intermediate layer plate is provided inside the DC charging pile housing, and the intermediate layer plate divides the inside of the DC charging pile housing into two independent front and rear spaces.

[0015] According to a first aspect, in a possible implementation, a plurality of installation openings for power conversion modules are provided on the bottom end face of the DC charging pile housing, and a plurality of power conversion modules are inserted into the box from the bottom of the DC charging pile housing from bottom to top.

[0016] According to a first aspect, in a possible implementation, a hinged and openable front door is provided on the DC charging pile housing, and a round lock for closing the door is installed on the right side of the DC charging pile housing.

[0017] According to a first aspect, in a possible implementation, the wall-mounted DC charging pile further includes a charging gun cable hook installed on the wall for placing the charging gun cable.

[0018] According to a first aspect, in a possible implementation, an emergency stop switch is installed at the middle part on the right side of the DC charging pile housing, and a display screen, an LED light board, and a card reader are installed on the front door.

[0019] Compared with the prior art, the beneficial effects of the present application are as follows:

[0020] Different from the prior art, the wall-mounted DC charging pile provided by the present application includes: a DC charging pile housing; the interior of the DC charging pile housing is a double-layer structure, and the double-layer structure includes an independent first cavity and a second cavity. Among them, electrical components are installed in the first cavity, and multiple power conversion modules are vertically installed in the second cavity; an air inlet is provided at the bottom of the DC charging pile housing, and air outlets are provided above the left and right sides of the DC charging pile housing; a plurality of DC charging gun output ports are provided on the bottom end face of the DC charging pile housing, and each DC charging gun cable is electrically connected to at least one of the multiple power conversion modules through one of the multiple DC charging gun output ports. By changing the horizontal installation of the power conversion module to vertical installation and setting the interior of the housing as two front and rear cavities to install the power conversion module and electrical components respectively, this wall-mounted DC charging pile not only eliminates the louver or maze waterproof structure door for the air inlet and outlet, but also meets the modular design, thereby making full use of space, achieving the effects of reducing the equipment volume, lowering the manufacturing cost, and facilitating installation. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figure 1 It is a three-dimensional view of the wall-mounted DC charging pile with the front door opened provided by the embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the component layout of the wall-mounted DC charging pile that can be observed from the front with the front door opened provided by the embodiment of the present application;

[0024] Figure 3 It is a schematic diagram of the layout of other components of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0025] Figure 4a It is a three-dimensional view of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0026] Figure 4b It is a front view of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0027] Figure 4c It is a top view of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0028] Figure 4d It is a bottom view of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0029] Figure 4e This is a side view of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0030] Figure 5 This is a circuit schematic diagram of the wall-mounted DC charging pile provided by the embodiment of the present application;

[0031] Figure 6 This is a topology diagram of the charging gun connection line of the wall-mounted DC charging pile provided by the embodiment of the present application.

[0032] Reference numerals: 1. LED light board, 2. Display screen, 3. AC lightning arrester, 4. Card reader, 5. AC leakage protection switch, 6. AC neutral copper bar, 7. AC wiring copper bar, 8. Grounding protection copper bar, 9. AC cable waterproof joint, 10. Auxiliary power supply, 11. Access control switch, 12. Charging gun monitoring board, 13. DC watt-hour meter, 14. Fuse, 15. Shunt, 16. DC contactor, 17. DC charging gun, 18. Charging gun line hook, 19. Charging gun cable waterproof joint, 20. Anti-theft screw, 21. Wall-mounted mounting plate, 22. Small round lock, 23. Air outlet, 24. Emergency stop switch, 25. Power conversion module, 26. Inlet air duct cover with dust filter. Detailed implementation manners

[0033] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this specification should have the ordinary meanings understood by those of ordinary skill in the art to which this specification belongs. The "first", "second" and similar terms used in the embodiments of this specification do not denote any order, quantity or importance, but are only used to avoid confusion of components.

[0034] Unless otherwise required by the context, throughout this specification, "a plurality of" means "at least two", and "including" is interpreted as an open and inclusive meaning, that is, "including, but not limited to". In the description of this specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of this specification. The schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0035] Next, the technical solutions in the embodiments of this specification will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this specification.

[0036] As Figure 1 shown, it is a perspective view of the wall-mounted DC charging pile with the front door opened provided by the embodiment of the present application. Except for the components outside the front door and the housing, the components mainly in the first cavity covered by the front door are shown.

[0037] Refer to Figure 2 and Figure 3 , Figure 2 which is a schematic diagram of the component layout of the wall-mounted DC charging pile with the front door opened and observable from the front provided by the embodiment of the present application, Figure 3 and which is a schematic diagram of the layout of other components of the wall-mounted DC charging pile provided by the embodiment of the present application. A wall-mounted DC charging pile provided by the present utility model includes: a DC charging pile housing; the inside of the DC charging pile housing is a double-layer structure, and the double-layer structure includes an independent first cavity and a second cavity. Among them, electrical components are installed in the first cavity, and a plurality of power conversion modules 25 are vertically installed in the second cavity; an air inlet is provided at the bottom of the DC charging pile housing, and air outlets 23 are provided above the left and right sides of the DC charging pile housing; a plurality of DC charging gun output ports are provided on the bottom end surface of the DC charging pile housing, and the cable of each DC charging gun 17 is electrically connected to at least one of the plurality of power conversion modules 25 through one of the plurality of DC charging gun output ports respectively.

[0038] The inside of the DC charging pile housing is isolated front and back into an independent double-layer structure (based on the front view), that is, two cavities. The front is the first cavity and the back is the second cavity. The air inlet can be provided at the bottom of the DC charging pile housing to ventilate and dissipate heat for the plurality of power conversion modules. Air outlets are provided above the left and right sides of the DC charging pile housing. In this way, it not only conforms to the heat dissipation principle, but also saves the louver or maze waterproof structure door for the air inlet and outlet. The air outlet can be a plurality of air outlet holes. The wall-mounted DC charging pile can provide at least two charging guns, so as to charge at least two devices.

[0039] By dividing the inside of the housing into two independent cavities, installing electrical components in the first cavity, vertically installing a plurality of power conversion modules in the second cavity, and adopting the structure design of lower air inlet and upper air outlet, the wall-mounted DC charging pile not only saves the louver or maze waterproof structure door for the air inlet and outlet, but also meets the modular design, and further makes full use of space, achieving the effects of reducing the volume of the device, lowering the manufacturing cost, and facilitating installation.

[0040] It can be understood that the present application is described by taking two power conversion modules and two charging guns as examples, and more devices can be charged by increasing the power conversion modules, charging guns and corresponding components.

[0041] For further designing the exhaust structure, as Figure 3As shown in the figure, an air inlet cover plate 26 with a dust filter is provided on the bottom end face of the DC charging pile housing. A plurality of mesh holes (not shown) are also provided on the air inlet cover plate 26, and a fan for exhausting air to the outside (not shown) is installed inside the air outlet.

[0042] The air inlet cover plate is not only used for air intake and filtration, but also for the bottom encapsulation of a plurality of power conversion modules. With such a design, not only can efficient heat dissipation be achieved, but also the entry of dust can be reduced, and the service life of the equipment can be prolonged.

[0043] As a preferred solution, as Figure 2 shown, the electrical components include an AC leakage protection switch 5, a plurality of copper bars, an AC lightning arrester 3, a plurality of auxiliary power supplies 10, an access control switch 11, a charging gun monitoring board 12, a DC watt-hour meter 13, a plurality of fuses 14, a plurality of shunts 15, and a plurality of DC contactors 16.

[0044] The plurality of copper bars may include an AC neutral copper bar 6, an AC connection copper bar 7, and a grounding protection copper bar 8. Among them, the AC neutral copper bar 6, the AC connection copper bar 7, and the grounding protection copper bar 8 are respectively used to connect a neutral wire, three live wires, and a ground wire of the AC cable. A copper bar, also known as a copper busbar or copper bus, is a conductive component processed from high-purity copper material; it usually appears as a flat long strip and has excellent electrical conductivity and mechanical strength. The auxiliary power supply is a power supply unit (abbreviated as PSU or power supply), which is mainly responsible for converting standard alternating current (AC) into low-voltage stable direct current (DC) for use by electronic devices such as computers and televisions. As Figure 5 shown, PSU1 to PSU2 can respectively supply power to 2 charging guns. The access control switch can be used to control the opening and closing of the front door. The charging gun monitoring board 12 receives information from each component and realizes the control of electrical components such as a plurality of charging guns, a plurality of DC contactors 16, and a plurality of power conversion modules 25. The DC watt-hour meter is an instrument specifically used to measure the power consumption and output in a DC circuit, and can measure the voltage, current, power, forward and reverse electric energy in the DC system. A fuse is based on the principle that after the current exceeds the specified value for a period of time, the melt is melted by the heat generated by itself, thereby disconnecting the circuit; it uses the principle of the thermal effect of current to automatically cut off the circuit when the current abnormally rises to protect the safety of electrical equipment and lines. A shunt is an instrument used to measure DC current, which is made based on the principle that a voltage is generated across a resistor when DC current passes through the resistor, and can distribute the input signal or energy to multiple output ports or systems. A DC contactor is a device widely used in the field of electrical control, which is specifically used to control the on and off of a DC circuit.

[0045] As a preferred solution, as Figure 2As shown in the figure, an AC input port is provided on the bottom end face of the DC charging pile housing, and charging gun insertion ports are provided below the left and right sides of the DC charging pile housing. The AC input cable enters the first cavity through the AC input port and is connected to the AC neutral copper busbar 6, the AC wiring copper busbar 7, and the grounding protection copper busbar 8. The charging gun cable enters the first cavity through the DC charging gun output port and is connected to the corresponding DC contactor. Such a layout can unify the power input and output positions, and it is not easy to have electric leakage. The position of the charging gun is appropriate, which is convenient for use and placement. In addition, a pluggable terminal for AC input and DC output is provided at the output end of the power conversion module, which is installed at the upper part of the second cavity, enabling the power conversion module to be hot-pluggable, facilitating installation and maintenance.

[0046] As a preferred solution, as Figure 2 shown, the DC charging pile housing is a waterproof sheet metal, and an AC cable waterproof joint is installed at the AC input interface, and a plurality of charging gun cable waterproof joints are installed at a plurality of DC charging gun output interfaces. Wall-mounted DC charging piles are generally used for outdoor wall mounting, so it is very necessary to do a good job in waterproofing.

[0047] As a preferred solution, an intermediate layer plate is provided inside the DC charging pile housing, and the intermediate layer plate divides the inside of the DC charging pile housing into two independent front and rear spaces. The inside of the DC charging pile housing is divided into two independent cavities by the intermediate layer plate. In addition, the electrical components in the front first cavity can be deployed on the intermediate layer plate.

[0048] As a preferred solution, as Figure 3 shown, a plurality of installation openings for power conversion modules are provided on the bottom end face of the DC charging pile housing, and a plurality of power conversion modules are inserted into the box from the bottom of the DC charging pile housing from bottom to top. After the power conversion module is installed, the air inlet cover plate is sealed to complete the installation, which is simple and convenient.

[0049] As a preferred solution, as Figure 3 shown, a hinge-mounted and openable front door is provided on the DC charging pile housing, and a small round lock 22 for closing the door is installed on the right side of the DC charging pile housing. Opening the front door enables the installation and maintenance of electrical components. After opening the small round lock, the right door can be opened for the maintenance of the power conversion module.

[0050] As a preferred solution, as Figure 3 shown, the wall-mounted DC charging pile further includes a charging gun line hook installed on the wall for placing the charging gun line. The charging gun line is stored through the charging gun line hook, achieving the neatness and beauty of the equipment.

[0051] As a preferred solution, as Figure 2 and Figure 3As shown in the figure, an emergency stop switch 24 is installed in the middle of the right side of the DC charging pile housing, and a display screen 2, an LED light board 1, and a card reader 4 are installed on the front door. When the charging pile is in a dangerous state, the power supply is cut off by pressing the emergency stop switch to stop the operation of the device, so as to protect the safety of personnel and equipment; users can operate the display screen according to their respective needs, and can perform automatic charging functions according to the power mode, amount mode, time mode, and reservation charging custom parameters, and can also directly charge in the automatic full charge mode; the LED light board 1 can display lights of various colors as needed to indicate the charging gun, power supply, and faults; the card reader 4 is used to start charging by swiping the card, and at the same time has the function of deducting fees by radio frequency card swiping for the charging pile. The card is verified according to the encrypted ESAM, and normal card swiping and fee deduction can be carried out only when the verification is correct.

[0052] As a preferred solution, as Figure 3 shown, the wall-mounted DC charging pile further includes a wall-mounted mounting plate 21 and anti-theft screws 20. After the wall-mounted mounting plate is installed, the DC charging pile housing can be hung on the wall-mounted mounting plate and fixed with anti-theft screws.

[0053] Specifically, the wall-mounted mounting plate can be installed on the wall with expansion bolts at a certain height, and then the wall-mounted DC charging pile can be installed from top to bottom, that is, the DC charging pile can be quickly installed on the wall through the hanging ears at the back, and then the fixed anti-theft screws of the cabinet and the wall-mounted mounting plate can be installed from the upper part of the back of the cabinet from top to bottom, thus completing the wall-mounted installation.

[0054] As Figure 5 shown, it is the circuit schematic diagram of the wall-mounted DC charging pile provided by the embodiment of the present application. Connect the wires according to the electrical schematic diagram and wiring diagram. After installing the copper busbar, install the waterproof connector for the charging gun on the DC charging pile, and pass the DC charging gun cable through the waterproof connector and connect it to the DC contactor to complete all the wiring.

[0055] As Figure 6As shown in the figure, it is the charging gun connection topology diagram of the wall-mounted DC charging pile provided by the embodiment of the present application. The figure includes direct-through DC contactors KA and KB and regulating DC contactor K. One of the multiple charging guns is connected to a corresponding one of multiple groups of charging modules through a direct-through DC contactor and is connected to one of the other groups of charging modules through a regulating DC contactor. The multiple charging guns, multiple groups of charging modules, and direct-through DC contactors correspond one by one. The regulating DC contactor is arranged between the output ends of any two of the multiple groups of charging modules. When charging gun A is idle and charging gun B is in use, the regulating DC contactor K and the direct-through DC contactor KB can be closed, so as to use two power conversion modules to charge one device and improve the charging efficiency. Similarly, when charging gun B is idle and charging gun A is in use, the regulating DC contactor K and the direct-through DC contactor KA can be closed, so as to use two power conversion modules to charge one device and improve the charging efficiency. When there are more than two charging guns and one or more charging guns are idle, similar processing can be carried out, which will not be elaborated here.

[0056] For the attachment Figure 5 , KMA1, KMA2, KMB1, and KMB2 are direct-through DC contactors, and KM3 and KM4 are regulating DC contactors.

[0057] As Figures 4a - 4e shown in the figure, it is the appearance schematic diagram of the wall-mounted DC charging pile provided by the embodiment of the present application, which are respectively the three-dimensional view, front view, top view, bottom view, and side view of the wall-mounted DC charging pile.

[0058] For the wall-mounted DC charging pile provided by the present application, by setting the inside of the cabinet into two front and rear cavities to install the power conversion module and electrical components respectively, and setting the air inlet and air outlet at the lower and upper parts respectively, not only the louvers or maze waterproof structure doors of the air inlet and outlet are omitted, but also the modular design is satisfied, thus making full use of the space, achieving the effects of reducing the volume of the device, reducing the manufacturing cost, and facilitating installation.

[0059] Regarding the above description of the disclosed embodiments, the features described in each embodiment in this specification can be replaced or combined with each other, enabling those skilled in the art to implement or use this application. As mentioned above, these are merely preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical content disclosed above, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A wall-mounted DC charging pile, characterized in that, Comprising: The housing of a DC charging pile; The interior of the housing of the DC charging pile is of a double-layer structure, and the double-layer structure includes an independent first cavity and a second cavity. Among them, electrical components are installed in the first cavity, and a plurality of power conversion modules are vertically installed in the second cavity; An air inlet is provided at the bottom of the housing of the DC charging pile, and air outlets are provided above the left and right sides of the housing of the DC charging pile; A plurality of DC charging gun output ports are provided on the bottom end face of the housing of the DC charging pile, and each DC charging gun cable is electrically connected to at least one of the plurality of power conversion modules through one of the plurality of DC charging gun output ports.

2. The wall-mounted DC charging pile according to claim 1, wherein An air inlet cover plate with a dust filter is provided on the bottom end face of the housing of the DC charging pile, and a plurality of mesh holes are further provided on the air inlet cover plate. A fan for exhausting air to the outside is installed in the air outlet.

3. The wall-mounted DC charging pile according to claim 2, wherein The electrical components include an AC leakage protection switch, a plurality of copper bars, an AC lightning arrester, a plurality of auxiliary power supplies, an access control switch, a charging gun monitoring board, a DC watt-hour meter, a plurality of fuses, a plurality of shunts, and a plurality of DC contactors.

4. The wall-mounted DC charging pile according to claim 1, characterized in that, An AC input port is provided on the bottom end face of the housing of the DC charging pile, and charging gun insertion ports are provided below the left and right sides of the housing of the DC charging pile.

5. The wall-mounted DC charging pile according to claim 4, wherein, The housing of the DC charging pile is a waterproof sheet metal, and an AC cable waterproof joint is installed at the AC input port, and a plurality of charging gun cable waterproof joints are installed at the plurality of DC charging gun output ports.

6. The wall-mounted DC charging pile according to claim 1, characterized in that, An intermediate layer plate is provided inside the housing of the DC charging pile, and the intermediate layer plate divides the interior of the housing of the DC charging pile into two independent front and rear spaces.

7. The wall-mounted DC charging pile according to claim 1, wherein Installation openings for the plurality of power conversion modules are provided on the bottom end face of the housing of the DC charging pile, and the plurality of power conversion modules are inserted into the box from the bottom of the housing of the DC charging pile from bottom to top.

8. The wall-mounted DC charging pile according to claim 4, wherein, A hinge-mounted and openable front door is provided on the housing of the DC charging pile, and a small round lock for closing the door is installed on the right side of the housing of the DC charging pile.

9. The wall-mounted DC charging pile according to claim 4, wherein It further includes a charging gun cable hook installed on the wall for placing the charging gun cable.

10. The wall-mounted DC charging pile according to claim 8, wherein, An emergency stop switch is installed at the middle position on the right side of the housing of the DC charging pile, and a display screen, an LED light board, and a card reader are installed on the front door.

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