Modular charging pile control box

Abstract

The utility model requests protecting a kind of modular charging pile control box, including bottom plate and shell, bottom plate is separated into control area and circuit area by wiring slot, mainboard and switching power supply are provided in control area, air switch, relay, fuse, positive direct current contactor and negative direct current contactor are provided in circuit area;The input end of switching power supply and the output end of air switch are connected, the output end of switching power supply respectively with mainboard and external charging gun form loop, for converting 220V alternating current into the working power supply of mainboard and the auxiliary power supply of charging gun;Positive direct current contactor and negative direct current contactor are used to control the on-off between external charging module and charging gun.The charging pile control box of the application integrates each device of charging pile control side, when assembling charging pile, only control box is fixed to charging pile inside to complete installation, without considering the line arrangement of each device in charging pile etc.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle charging pile technology, specifically a modular charging pile control box. Background Technology

[0002] Charging piles function similarly to gas pumps at gas stations. They can be fixed to the ground or walls and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. They can charge various models 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 electric vehicle is charged through various switching devices within the charging pile and finally through the charging plug at the output end.

[0003] Currently, the switching devices inside charging piles are all mounted on internal sheet metal. The assembly process involves first completing the overall frame of the charging pile, then installing the switching devices, and finally connecting the wiring. When a circuit fault occurs, it is usually necessary to troubleshoot step by step to determine which switching device is damaged, a time-consuming and labor-intensive process. Therefore, optimizing the internal structure of charging piles is the technical problem that this application aims to solve. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a modular charging pile control box, which can be directly installed inside the charging pile to control the power input and output of the charging modules in the charging cabinet, as well as monitor the power and status of the charging cabinet.

[0005] The technical solution of this utility model is as follows:

[0006] A modular charging pile control box includes a base plate and a shell. The base plate is divided into a control area and a circuit area by a wiring channel. The control area is equipped with a main board and a switching power supply, and the circuit area is equipped with an air switch, a relay, a fuse, a positive DC contactor and a negative DC contactor.

[0007] The input terminal of the air switch is used to connect to an external 220V AC power supply;

[0008] The input terminal of the switching power supply is connected to the output terminal of the air switch. The output terminal of the switching power supply forms a circuit with the motherboard and the external charging gun respectively, which is used to convert 220V AC power into the working power of the motherboard and the auxiliary power of the charging gun.

[0009] One relay main contact is connected in series in the external charging gun circuit of the switching power supply to control the auxiliary power supply of the external charging gun; one end of the relay main contact is connected to the live wire output terminal of the air switch, and the other end is used to connect to the AC contactor of the external charging module to control the power on and off of the external charging module; all relay auxiliary terminals are connected to the main board.

[0010] The first end of the fuse is connected to the positive terminal of the external charging module, and the second end of the fuse is connected to one main contact of the positive DC contactor. The other main contact of the positive DC contactor is connected to the charging gun. One main contact of the negative DC contactor is connected to the negative terminal of the charging module, and the other main contact of the negative DC contactor is connected to the charging gun. The control contacts of the positive and negative DC contactors are connected to the main board to control the connection and disconnection between the external charging module and the charging gun.

[0011] The outer casing is mounted on the base plate. The outer casing has a cable routing port and a closing port. The cable routing port is for the line to pass through, and the closing port is located at the air switch for the user to operate the air switch.

[0012] In summary, the above technical solution has the following beneficial effects: The charging pile control box of this application integrates various components on the charging pile control side. When assembling the charging pile, installation can be completed simply by fixing the control box inside the charging pile, eliminating the need to consider the wiring layout of various components within the charging pile. Multiple wiring ports are provided for control signal input, 220V AC power input, control signal output, and power output, respectively. It primarily realizes the input and output control of the charging pile's charging module, and can also, as needed, control the power supply and disconnection of other components within the charging pile, and receive signals. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the mainboard of a modular charging pile control box;

[0014] Figure 2 A schematic diagram of the partition of a modular charging pile control box;

[0015] Figure 3 A schematic diagram of the wiring ports for a modular charging pile control box;

[0016] Figure 4 A schematic diagram of the closing port of a modular charging pile control box;

[0017] Figure 5 This is a schematic diagram of the input control of a modular charging pile control box;

[0018] Figure 6 This is a schematic diagram of the output control of a modular charging pile control box;

[0019] Attached reference numerals: 10. Base plate; 11. Cable tray; 12. Control area; 13. Circuit area; 14. Partition; 20. Housing; 21. Cable routing port; 22. Closing port; 23. Observation port; 30. Main board; 40. Switching power supply; 50. Air switch; 60. Relay; 70. Fuse; 80. Positive DC contactor; 90. Negative DC contactor; 100. DC energy meter; 110. Shunt; 120. Positive intermediate DC contactor; 130. Negative intermediate DC contactor; 140. Maintenance socket; 150. Adapter board. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] Appendix Figure 5 In this diagram, QF1 represents an air switch 50, UP1, UP2, and UP3 represent switching power supplies 40, KA1, KA2, KA3, and KA4 represent relays 60, X1, X2, and X3 represent adapter boards 150, and PJ represents the power supply terminal of a DC energy meter 100. (See attached diagram.) Figure 6 In the diagram, 1FU and 2FU represent fuse 70, 1K1 and 2K1 represent positive DC contactor 80, 1K2 and 2K2 represent negative DC contactor 90, 1RSX and 2RSX represent shunt 110, GO1 represents positive intermediate DC contactor 120, and GO21 represents negative intermediate DC contactor 130.

[0022] like Figures 1-6As shown, a modular charging pile control box includes a base plate 10 and a housing 20. The base plate 10 is divided into a control area 12 and a circuit area 13 by a wiring groove 11. The control area 12 houses a main board 30 and a switching power supply 40. The circuit area 13 houses an air switch 50, a relay 60, a fuse 70, a positive DC contactor 80, and a negative DC contactor 90. The input terminal of the air switch 50 is used to connect to an external 220V AC power supply. The input terminal of the switching power supply 40 is connected to the output terminal of the air switch 50. The output terminal of the switching power supply 40 forms a circuit with the main board 30 and the external charging gun, respectively, to convert the 220V AC power into the working power supply for the main board 30 and the auxiliary power supply for the charging gun. The main contact of a relay 60 is connected in series in the external charging gun circuit of the switching power supply 40 to control the auxiliary power supply of the external charging gun. One end of the main contact of the relay 60 is connected to the live wire output terminal of the air switch 50. The other end is used to connect to the AC contactor of the external charging module to control the power supply of the external charging module; the auxiliary terminals of all relays 60 are connected to the main board 30; the first end of the fuse 70 is used to connect to the positive terminal of the external charging module, the second end of the fuse 70 is connected to one main contact of the positive DC contactor 80, and the other main contact of the positive DC contactor 80 is connected to the charging gun; one main contact of the negative DC contactor 90 is used to connect to the negative terminal of the charging module, and the other main contact of the negative DC contactor 90 is connected to the charging gun; the control contacts of the positive DC contactor 80 and the negative DC contactor 90 are respectively connected to the main board 30 to control the power supply between the external charging module and the charging gun; the housing 20 is set on the base plate 10, and the housing 20 has a wiring port 21 and a closing port 22. The wiring port 21 is used for the line to pass through, and the closing port 22 is set at the air switch 50 for the user to operate the air switch 50.

[0023] The charging pile control box of this application integrates various components on the charging pile control side. When assembling the charging pile, installation can be completed simply by fixing the control box into the charging pile, eliminating the need to consider the wiring layout of each component within the charging pile. Multiple wiring ports 21 are provided for control signal input, 220V AC power input, control signal output, and power output, respectively. It primarily controls the input and output of the charging module of the charging pile, and can also, as needed, control the power supply and disconnection of other components within the charging pile, and receive signals.

[0024] In use, all auxiliary contacts of relays 60 are connected to the main board 30 and controlled by the main board 30. External lines and 220V AC power enter the housing 20 and connect to the air switch 50 through the wiring port 21. The switching power supply 40 is connected in parallel to the air switch 50 to generate DC power for working power and auxiliary power. Relays 60 are connected to the live wire of the air switch 50 to control the on / off power of the live wire of external devices.

[0025] Preferably, each charging gun is equipped with a corresponding switching power supply 40. The attached diagram shows two charging guns and three switching power supplies 40 as an example. The input terminals of all three switching power supplies 40 are connected in parallel to the output terminal of the air switch 50. One switching power supply 40 is used to convert 220V AC power into the operating power of the main board 30, and the other two switching power supplies 40 are used to provide auxiliary power to the two charging guns respectively. Preferably, the output terminals of the switching power supplies 40 providing auxiliary power to the charging guns are connected in series with relays 60. The control terminals of the relays 60 are connected to the main board 30 to control the on / off state of the auxiliary power supply to the charging guns.

[0026] The process of controlling the charging module to charge the vehicle is as follows: the live wire terminal of the auxiliary contact of the external AC contactor is connected through relay 60, and the neutral wire terminal of the auxiliary contact of the AC contactor is connected to the neutral wire, thereby realizing the on / off control of the main contact of the external AC contactor. When the main contact of the external AC contactor is connected, the input terminal of the external charging module receives AC power. This AC voltage is set according to the requirements of the corresponding charging pile. Then the charging module can convert the AC power into DC power to charge the vehicle. When the main board 30 determines that the charging gun is connected to the vehicle, it controls the charging module to convert DC power into DC power to charge the vehicle.

[0027] There are other devices inside the charging pile that need to be controlled to turn on and off. These can also be controlled by adding a relay 60. For example, a relay 60 can be connected to the live wire output terminal of the air switch 50 to connect to an external fan, so that the main board 30 can control whether the fan rotates.

[0028] Circuit area 13 is also equipped with a DC energy meter 100 and a shunt 110. The second terminal of the fuse 70 is connected to the voltage terminal of the DC energy meter 100 to measure the voltage. The shunt 110 is connected in series between the negative terminal of the charging module and the negative DC contactor 90. The current terminal of the DC energy meter 100 is connected to the shunt 110 to measure the current. The main board 30 is connected to the DC energy meter 100 to acquire the measured voltage and current.

[0029] The power supply terminal of the DC energy meter 100 is connected in parallel to the output terminal of the air switch 50. If the power supply terminal is DC, a rectifier is added before connection. The connection method between the DC energy meter 100 and the shunt 110 is existing technology and will not be described in detail. Because the charging current is large, the shunt 110 is used to reduce the current.

[0030] Two sets of fuses 70, positive DC contactor 80, negative DC contactor 90, and shunt 110 are provided to allow the charging module to supply power to the two charging guns; the two fuses 70 are connected through positive intermediate DC contactor 120, and the two shunts 110 are connected through negative intermediate DC contactor 130. The control terminals of positive intermediate DC contactor 120 and negative intermediate DC contactor 130 are respectively connected to the main board 30.

[0031] The control box of this application can be used in charging piles with two charging guns. The main board 30 is connected to the signal lines of the two charging guns respectively. The main board 30 distributes the power of the two charging guns through the positive intermediate DC contactor 120 and the negative intermediate DC contactor 130. Preferably, an adapter board 150 is provided at the corresponding position in the circuit area 13. The main board 30 and the charging guns are connected through the adapter board 150, thereby improving the connection efficiency. The housing 20 has an opening for the adapter board 150 at the corresponding position. When both charging guns are being charged by vehicles, the positive intermediate DC contactor 120 and the negative intermediate DC contactor 130 are disconnected, and the charging modules are divided into two groups to supply power to the two charging guns respectively. When only one charging gun is being charged by a vehicle, the positive intermediate DC contactor 120 and the negative intermediate DC contactor 130 are closed, so that both groups of charging modules supply power to the charging gun on one side, thereby achieving the effect of power distribution. Correspondingly, a DC ammeter is connected to the two charging guns to measure the voltage and current respectively.

[0032] Three switching power supplies 40 are provided to supply operating power to the main board 30 and auxiliary power to the two charging guns. All three switching power supplies 40 are connected in parallel to the output terminal of the air switch 50. The output terminal of the switching power supply 40 that provides auxiliary power to the charging guns is connected to a relay 60 to control the auxiliary power supply of the external charging guns.

[0033] The outer casing 20 has an observation port 23 at the location of the DC energy meter 100. The observation port 23 is used to expose the display screen of the DC energy meter 100 so as to observe the reading of the DC energy meter 100.

[0034] A maintenance socket 140 is provided within circuit area 13. The maintenance socket 140 is connected to the output terminal of the air switch 50, and is used to obtain power from the air switch 50 and provide power to the socket. The maintenance socket 140 can be connected to either the input or output terminal of the air switch 50. Preferably, the maintenance socket 140 is connected to the output terminal of the air switch 50 to provide power to the maintenance equipment in case of a control box or charging cabinet failure. The ground wire of the socket is connected to an external grounding terminal.

[0035] The maintenance socket 140 and the air switch 50 are arranged side by side, so that both are exposed through the closing port 22.

[0036] The base plate 10 is provided with an adapter plate 150 that is connected to the main board 30, for connecting the wires entering and exiting from the wiring port 21.

[0037] Specifically, there are multiple adapter boards 150. The attached diagram shows three adapter boards 150X1, X2, and X3. Adapter board 150X1 can connect to relays 60KA3 and 60KA4, thereby connecting to external AC contactors and fans. The neutral wires of the external AC contactors and fans can be connected to any neutral wire to form a loop. External smoke feedback signals, water immersion feedback signals, tilt feedback signals, temperature resistance signals, fan speed feedback signals, surge protector feedback signals, emergency stop feedback signals, access control feedback signals, light board signals, card reader signals, screen signals, 220V AC power, and charging module control lines can all be connected to adapter board 150X1. Adapter board 150X2 connects to the output of switching power supply 40UP2, as well as the signal lines of the corresponding charging gun and the main board 30. Adapter board 150X3 connects to the output of switching power supply 40UP3, as well as the signal lines of the corresponding charging gun and the main board 30. The connection lines of adapter board 150 can be adjusted arbitrarily according to the layout.

[0038] A partition 14 is provided within the control area 12. The main board 30 is located below the partition 14, and the switching power supply 40 is located above the partition 14. Because the main board 30 is thin, the control area 12 is divided into two layers by the partition 14, which can effectively utilize the space of the control box. The wires of the switching power supply 40 extend to each main board 30 through circumferential grooves to complete the connection. The adapter board 150 is located above the partition 14.

[0039] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A modular charging post control box, characterized in that, It includes a base plate (10) and a housing (20). The base plate (10) is divided into a control area (12) and a circuit area (13) by a wiring groove (11). The control area (12) is equipped with a main board (30) and a switching power supply (40). The circuit area (13) is equipped with an air switch (50), a relay (60), a fuse (70), a positive DC contactor (80), and a negative DC contactor (90). The input terminal of the air switch (50) is used to connect to an external 220V AC power supply; The input terminal of the switching power supply (40) is connected to the output terminal of the air switch (50). The output terminal of the switching power supply (40) forms a circuit with the motherboard (30) and the external charging gun respectively, which is used to convert 220V AC power into the working power of the motherboard (30) and the auxiliary power of the charging gun. One of the main contacts of the relay (60) is connected in series in the external charging gun circuit of the switching power supply (40) to control the auxiliary power supply of the external charging gun; one end of the main contact of the relay (60) is connected to the live wire output terminal of the air switch (50), and the other end is used to connect to the AC contactor of the external charging module to control the power on and off of the external charging module; the auxiliary terminals of all relays (60) are connected to the main board (30); The first end of the fuse (70) is used to connect to the positive terminal of the external charging module, and the second end of the fuse (70) is connected to one main contact of the positive DC contactor (80). The other main contact of the positive DC contactor (80) is connected to the charging gun. One main contact of the negative DC contactor (90) is used to connect to the negative terminal of the charging module, and the other main contact of the negative DC contactor (90) is connected to the charging gun. The control contacts of the positive DC contactor (80) and the negative DC contactor (90) are respectively connected to the main board (30) to control the connection and disconnection between the external charging module and the charging gun. The outer casing (20) is mounted on the base plate (10). The outer casing (20) has a cable routing port (21) and a closing port (22). The cable routing port (21) is used for the line to pass through, and the closing port (22) is located at the air switch (50) for the user to operate the air switch (50).

2. The modular charging station control box of claim 1, wherein, The circuit area (13) is also provided with a DC energy meter (100) and a shunt (110), and the second end of the fuse (70) is connected to the voltage terminal of the DC energy meter (100) to measure the voltage; The shunt (110) is connected in series between the negative terminal of the charging module and the negative DC contactor (90), and the current terminal of the DC energy meter (100) is connected to the shunt (110) to measure the current. The motherboard (30) is connected to the DC power meter (100) to obtain the measured voltage and current.

3. The modular charging station control box of claim 1, wherein, The fuse (70), positive DC contactor (80), negative DC contactor (90) and shunt (110) are each provided in two sets to allow the charging module to supply power to the two charging guns; The two fuses (70) are connected by a positive intermediate DC contactor (120), and the two shunts (110) are connected by a negative intermediate DC contactor (130). The control terminals of the positive intermediate DC contactor (120) and the negative intermediate DC contactor (130) are respectively connected to the main board (30).

4. The modular charging station control box of claim 3, wherein, The switching power supply (40) is provided in three parts, which are used to provide working power to the motherboard (30) and auxiliary power to the two charging guns.

5. The modular charging station control box of claim 2, wherein, The outer casing (20) has an observation port (23) at the position of the DC power meter (100).

6. The modular charging station control box of claim 1, wherein, A maintenance socket (140) is provided in the circuit area (13). The maintenance socket (140) is connected to the output terminal of the air switch (50) and is used to obtain power from the air switch (50) and provide power to the socket.

7. The modular charging station control box of claim 6, wherein, The maintenance socket (140) and the air switch (50) are arranged side by side, so that they are both exposed through the closing port (22).

8. The modular charging station control box of any one of claims 1-7, wherein, The base plate (10) is provided with an adapter plate (150) that is connected to the main board (30) for connecting wires that enter and exit from the wiring port (21).

9. A modular charging station control box according to any one of claims 1-7, characterized in that, The control area (12) is provided with a partition (14), the main board (30) is located below the partition (14), and the switching power supply (40) is located above the partition (14).

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