Multi-interface charging pile system with electric energy routing function

Abstract

The invention relates to the technical field of charging equipment, and discloses a multi-interface charging pile system with an electric energy routing function, which comprises an alternating current power supply system, a direct current power supply system, an energy storage power supply system, a main control module, a power supply conversion module, a circuit breaker, a current / voltage sampling module, a man-machine interaction unit, a charging gun and an electric energy meter, the three power supply systems are respectively connected with the circuit breaker and then connected with the power conversion module; the power conversion module is connected with the charging pile after being connected with the breaker; the main control module is respectively connected with the power supply conversion module, the circuit breaker, the current / voltage sampling module, the man-machine interaction module and the electric energy meter; the main control module is used for controlling the power supply conversion module to output a related power supply value after the charging gun is communicated with the electric vehicle; the control module receives the voltage data of the current / voltage sampling module and controls the connection state of the circuit breaker; and charging according to the electric energy metering of the electric energy meter. According to the invention, charging requirements of different scenes can be met on the basis of realizing power supply reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of charging equipment, and in particular to a multi-interface charging pile system with an electric energy routing function. Background Art

[0002] With the rapid growth of new energy vehicle production and sales, the market demand for car charging piles is also increasing. The expansion of the new energy vehicle market, especially the popularity of electric vehicles, has led to an increasingly urgent demand for fast charging.

[0003] Currently, there are AC charging piles and DC charging piles on the market. AC charging piles transmit AC power from the power grid directly to the vehicle's onboard charger through the charging gun, which converts the AC power into DC power and then charges the battery pack. However, the charging speed is slow and it is suitable for charging in places where you stay for a long time, such as homes and workplaces. DC charging piles convert AC power from the power grid into DC power through the power electronic equipment inside the charging pile, and transmit it directly to the vehicle's battery pack through the charging gun. It has the characteristics of fast charging speed and high efficiency, and is suitable for charging in places where you stay for a short time, such as highway service areas and commercial centers. However, in actual application, different vehicles and needs require different charging methods. In this case, the charging pile needs to be able to adapt to more types of electric vehicles and meet the charging needs in different scenarios on the basis of meeting the reliability of power supply.

[0004] In view of this, a multi-interface charging pile system with power routing function is needed. Summary of the invention

[0005] In view of the problem that existing charging piles in the prior art cannot simultaneously meet the reliable power supply and charging requirements in different scenarios, the present invention provides a multi-interface charging pile system with power routing function, which can simultaneously achieve power supply reliability and applicability, and meet the charging requirements of cars of different brands and types. The specific technical solution is as follows:

[0006] A multi-interface charging pile system with electric energy routing function, comprising an AC power supply system, a DC power supply system, an energy storage power supply system, a main control module, a power conversion module, a plurality of circuit breakers, a current / voltage sampling module, a human-computer interaction unit, a charging gun and an electric energy meter; the AC power supply system, the DC power supply system and the energy storage power supply system are respectively connected to the circuit breaker and then connected to one end of the power conversion module; the other end of the power conversion module is connected to the circuit breaker and then connected to the charging gun; the main control module is respectively connected to the power conversion module, the circuit breaker, the current / voltage sampling module, the human-computer interaction module and the electric energy meter;

[0007] The main control module is used to: when the charging gun is normally connected to the electric vehicle, control the power conversion module to output relevant power values; receive the current and voltage data from the current / voltage sampling module, process and analyze them, and control the connection status of the circuit breaker; and charge according to the electric energy measurement of the electric energy meter.

[0008] Preferably, the main control module receives the self-sampled voltage data, processes and analyzes the data according to a preset program or user setting, and when it is determined that the sampled voltage exceeds the set value, it will issue a corresponding control instruction to cut off the connected circuit breaker.

[0009] Preferably, the human-machine interaction unit includes a card reader and a display screen; a QR code is provided in the display screen; when the main control module receives a card swiping or code scanning charging instruction from the human-machine interaction unit, the circuit breaker is controlled to close.

[0010] Preferably, the card reader is used to identify the user's identity, and transmit the authorized charging permission to the main control module after the user's identity verification is passed.

[0011] Preferably, the electric energy meter is used to collect current and voltage data during the charging and discharging process of the charging gun, and upload the sampled current and voltage data to the main control module for analysis and processing, and the main control module transmits the analyzed and processed data to the display screen for display.

[0012] Preferably, the AC power supply system is used to provide AC power for the charging pile; the DC power supply system is used to provide high-voltage DC power for the charging pile; and the energy storage power supply system is used as a backup power supply to supplement electrical energy for the charging pile.

[0013] Preferably, the main control module performs communication handshake preparation and inspection with the electric vehicle through the communication line in the charging gun, and controls the power conversion module to output relevant output power values ​​after the charging conditions are met.

[0014] Preferably, the power conversion module includes a PFC power factor correction circuit, a PWM converter module and a DC / DC conversion module.

[0015] Preferably, the charging gun includes at least two charging gun ports, and the charging gun ports are adapted to the charging ports of the electric vehicle.

[0016] Preferably, a multi-interface charging pile system with power routing function also includes a communication module, which is connected to the main control module and is used to realize remote monitoring and intelligent scheduling of the charging piles through the main control module.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A multi-interface charging pile system with electric energy routing function of the present invention has energy routing function, and the power supply port and the power receiving port can be freely selected. In the charging mode, the multi-interface charging pile system can use the DC power of the DC system and the AC power of the power grid to provide acceptable DC power for the electric vehicle power battery or the energy storage battery, thereby charging the vehicle or the energy storage device; in the discharge mode, the DC power of the electric vehicle power battery or the energy storage battery can be converted and transmitted to the DC system or the power grid, so as to supply power to the electrical equipment in the DC system or discharge to the power grid. At the same time, the AC power supply system, the DC power supply system and the energy storage power supply system of the multi-interface charging pile system are respectively connected to the circuit breaker and then connected to one end of the power conversion module, and the other end of the power conversion module is connected to the circuit breaker and then connected to the charging gun. The double insurance method of the two circuit breakers improves the safety of the charging pile system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 This is a schematic diagram of a multi-interface charging pile system with power routing function of the present invention.

[0021] Figure 2 This is a schematic diagram of the DC / DC conversion module of the present invention.

[0022] Figure 3 This is a schematic diagram of the PWM converter module of the present invention.

[0023] Figure 4 This is an operation flow chart of a multi-interface charging pile system with power routing function of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] See the following examples Figures 1 to 4 .

[0029] The embodiment of the present application provides a multi-interface charging pile system with an electric energy routing function, including an AC power supply system, a DC power supply system, an energy storage power supply system, a main control module, a power conversion module, a plurality of circuit breakers, a current / voltage sampling module, a human-computer interaction unit, a charging gun and an electric energy meter; the AC power supply system, the DC power supply system and the energy storage power supply system are respectively connected to the circuit breaker and then connected to one end of the power conversion module (such as Figure 1 As shown, the DC power supply system is connected to the power conversion module through circuit breaker A, the AC power supply system is connected to the power conversion module through circuit breaker B, and the energy storage power supply system is connected to the power conversion module through circuit breaker C); the other end of the power conversion module is connected to the circuit breaker C and then connected to the charging gun; the main control module is respectively connected to the power conversion module, the circuit breaker, the current / voltage sampling module, the human-computer interaction module and the electric energy meter;

[0030] The main control module is used to: when the charging gun is normally connected to the electric vehicle, control the power conversion module to output relevant power values; receive the current and voltage data from the current / voltage sampling module, process and analyze them, and control the connection status of the circuit breaker; and charge according to the electric energy measurement of the electric energy meter.

[0031] Among them, the AC power supply system can provide AC380V power for the charging pile; the DC power supply system can provide DC750V power for the charging pile; the energy storage power supply system is used as a backup power supply. When the DC power supply system is insufficient or the power demand increases, the battery pack will release the previously stored power to supplement the power supply for the charging pile. By setting up the AC power supply system and the DC power supply system, various types of charging needs can be met, and flexible power supply can be provided for charging objects such as electric vehicles.

[0032] A multi-interface charging pile system with electric energy routing function of the present invention has energy routing function, and the power supply port and the power receiving port can be freely selected. The multi-interface charging pile system can realize flexible transmission and management of energy between multiple energy nodes. In charging mode, the DC power of the DC system and the AC power of the power grid can provide acceptable DC power for the electric vehicle power battery or the energy storage battery, thereby charging the vehicle or the energy storage device; in discharge mode, the DC power of the electric vehicle power battery or the energy storage battery can be converted and transmitted to the DC system or the power grid, so as to realize power supply to the electric equipment in the DC system or discharge to the power grid. At the same time, the AC power supply system, the DC power supply system and the energy storage power supply system of the multi-interface charging pile system are respectively connected to the circuit breaker and then connected to one end of the power conversion module, and the other end of the power conversion module is connected to the circuit breaker and then connected to the charging gun. The double insurance method of the two circuit breakers improves the safety of the charging pile system.

[0033] Specifically, the main control module receives the self-sampled voltage data, processes and analyzes the data according to a preset program or user setting, and when it is determined that the sampled voltage exceeds the set value, it will issue a corresponding control instruction to cut off the connected circuit breaker.

[0034] When the main control module detects that the sampled voltage exceeds the set safety threshold, the main control module can quickly issue a control command to cut off the connected circuit breaker. This timely response can effectively isolate the faulty equipment or circuit from the system, prevent the fault from further expanding, and reduce the impact on the entire system. Since overvoltage is one of the common faults of many electrical equipment and systems, if it is not handled in time, it may cause serious consequences such as equipment damage, performance degradation, and even fire. This control logic of the main control module can effectively protect the equipment from overvoltage damage by isolating the fault point in time, extending the service life of the equipment and reducing maintenance costs. At the same time, the control logic of the main control module can take immediate action when potential safety hazards are detected, realizing automatic monitoring, analysis and control of voltage.

[0035] In addition, users can set voltage thresholds and control strategies according to actual needs. This flexibility enables the main control module to adapt to different application scenarios and needs (including DC charging or AC charging), improving the adaptability and scalability of the system.

[0036] Specifically, the human-machine interaction unit includes a card reader and a display screen; a QR code is provided in the display screen; when the main control module receives a card swiping or code scanning charging instruction from the human-machine interaction unit, the circuit breaker is controlled to close.

[0037] The card reader is used to identify the user and transmit the authorized charging permission to the main control module after the user identity verification is passed.

[0038] The electric energy meter is used to collect current and voltage data during the charging and discharging process of the charging gun, and upload the sampled current and voltage data to the main control module for analysis and processing. The main control module transmits the analyzed and processed data to the display screen for display.

[0039] In the specific implementation, the card reader can identify the user's identity. After the user's identity authentication is passed, the authorized charging permission will be transmitted to the main control module. The main control module stores and records the charging information, including key information such as charging time and charging amount. This information will be used for subsequent settlement and fee management to realize recharge and settlement.

[0040] In the specific charging mode, during normal operation, after the charging gun is connected to the electric vehicle, the main control module receives the charging instruction by swiping the card or scanning the code, and immediately closes the circuit breaker. The main control module prepares and checks the communication handshake with the electric vehicle through the communication line in the charging gun. After the charging conditions are met, the power conversion module is controlled to output the relevant power value, and the electric energy meter measures the amount of electricity charged by the electric vehicle. The main control module can charge accordingly. After the charging is completed, the user of the charging pile is prompted to pull out the gun and return it to its position, waiting for the next charging.

[0041] In the specific discharge mode, during normal operation, after the charging gun is connected to the electric vehicle and a connection channel is established, signal communication will be carried out between the electric vehicle and the DC system, energy storage power supply system and power grid to understand the power demand situation. The electric vehicle will adjust its own discharge power according to the demand situation. The electric energy meter measures the amount of electricity discharged by the electric vehicle, and the main control module can charge accordingly. After the charging is completed, the charging pile user is prompted to unplug the gun and return to its position.

[0042] Specifically, the power conversion module includes a PFC power factor correction circuit, a PWM converter module and a DC / DC conversion module.

[0043] In the specific implementation, the DC / DC conversion module used for DC input is as follows: Figure 2The schematic diagram of the DC / DC conversion module shown in the figure shows that the DC / DC conversion adopts an isolated circuit, and LC is a filter circuit. When a DC voltage is input, the DSP chip in the control module outputs four PWM1, PWM2, PWM3, and PWM4 pulse signals to the power tubes V1, V2, V3, and V4. The primary winding and secondary winding of the high-frequency transformer T have a magnetic circuit induction function. The high-frequency pulse electricity of the primary winding will induce a high-frequency voltage in the secondary winding. This voltage passes through the power tubes V5, V6, V7, V8, inductor L2, and filter capacitor C2 to output a DC voltage U0, thereby charging the DC electric vehicle. When the car is discharged, the working process is similar, but in the opposite direction. The PWM converter module used for AC input, such as Figure 3 The schematic diagram of the PWM converter module is shown in the figure, where L3, L4, and L5 play a filtering role, and C3 plays a voltage stabilizing role. At the same time, the PFC power factor correction circuit is adopted to improve current harmonics and stabilize voltage. Then, it passes through the rectifier circuit and is rectified into DC to charge the car. When the car is discharging, it passes through the inverter circuit and is inverted into AC, which is then fed back to the power grid.

[0044] PFC (Power Factor Correction) is a power factor correction circuit. Its main function is to control the waveform of the input current so that it is synchronized with the input voltage waveform, thereby improving the power factor and reducing the harmonic content. The power factor refers to the ratio of active power to apparent power (total power consumption). The larger the power factor, the higher the power utilization rate. The PFC circuit can effectively utilize more electrical energy, reduce the loss of exchange power, reduce the generation of harmonics, and improve the stability and reliability of the system by reducing the phase difference between current and voltage, reducing harmonic pollution, and improving electromagnetic compatibility and electromagnetic interference problems.

[0045] The PWM (Pulse Width Modulation) converter module can change the voltage and current at both ends of the load by adjusting the duty cycle of the PWM signal, thereby realizing the drive and speed regulation of motors and other equipment. In the process of motor drive and speed regulation, PWM technology can achieve energy-saving effects and improve energy utilization efficiency. When adjusting voltage and current, the PWM converter module can reduce the generation of harmonics and reduce pollution to the power grid.

[0046] The DC / DC conversion module converts the voltage, current or power of a DC power source into another different DC power source. It converts the input voltage into an output voltage that suits the load requirements, such as converting a high voltage into a low voltage, or converting a low voltage into a higher voltage; according to the load's current requirements, it converts the input current into the output current, such as converting a high current into a low current, or converting a low current into a higher current; it achieves power step-down / step-up or reduces / improves the efficiency of power transmission to meet the load's power requirements.

[0047] The power conversion module realizes the conversion, regulation and protection functions of electric energy through the PFC power factor correction circuit, PWM converter module and DC / DC conversion module.

[0048] Specifically, the charging gun includes at least two charging gun ports, and the charging gun ports are adapted to the charging ports of the electric vehicle. The charging gun is used to connect the charging pile with the electric vehicle or the energy storage device to achieve the transmission of power.

[0049] Specifically, a multi-interface charging pile system with power routing function also includes a communication module, which is connected to the main control module and is used to realize remote monitoring and intelligent scheduling of the charging pile through the main control module.

[0050] It should be noted that the charging pile of the present application has a DC power supply port, which can provide clean electricity for electric vehicles by adopting new energy, effectively reducing energy costs and charging time while improving charging efficiency.

[0051] The charging pile system of the present invention can also be used as a beneficial supplement to the power grid. When the grid load is at a peak, electric vehicles or energy storage devices can feed back the stored power to the grid through the charging pile, helping to relieve the pressure on the grid and achieve peak load reduction; when the grid load is at a low point, electric vehicles or energy storage devices can be charged from the grid to fill the idle time of the grid, thereby balancing the supply and demand relationship of the grid. In addition, the charging pile can also promote the consumption of renewable energy.

[0052] The multi-interface charging pile system of the present application has five interfaces and integrates AC and DC power supply, which greatly saves space and cost and can meet the charging needs in different scenarios.

[0053] Please note that Figure 4 Operation flow chart, after the system operation is initialized, the fault monitoring module detects in real time whether the system has any faults. When it is determined that a fault has occurred, the fault point is located, and the circuit breaker is immediately disconnected to cut off the fault circuit, and then the fault is repaired. When the repair is completed, the system resumes operation.

[0054] Those of ordinary skill in the art will appreciate that the units of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0055] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored, etc.

[0056] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0057] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-0nlyMemory), random access memory (RAM, RandomAccessMemory), mobile hard disk, magnetic disk or optical disk, etc., which can store program code.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A multi-interface charging pile system with power routing function, characterized in that: It includes an AC power supply system, a DC power supply system, an energy storage power supply system, a main control module, a power conversion module, several circuit breakers, a current / voltage sampling module, a human-computer interaction unit, a charging gun and an electric energy meter; the AC power supply system, the DC power supply system and the energy storage power supply system are respectively connected to the circuit breaker and then connected to one end of the power conversion module; the other end of the power conversion module is connected to the circuit breaker and then connected to the charging gun; the main control module is respectively connected to the power conversion module, the circuit breaker, the current / voltage sampling module, the human-computer interaction module and the electric energy meter; The main control module is used to: when the charging gun is normally connected to the electric vehicle, control the power conversion module to output relevant power values; receive the current and voltage data from the current / voltage sampling module, process and analyze them, and control the connection status of the circuit breaker; and charge according to the electric energy measurement of the electric energy meter.

2. A multi-interface charging pile system with power routing function according to claim 1, characterized in that: The main control module receives the self-sampled voltage data, processes and analyzes the data according to a preset program or user setting, and when it is determined that the sampled voltage exceeds the set value, it will issue a corresponding control instruction to cut off the connected circuit breaker.

3. A multi-interface charging pile system with power routing function according to claim 2, characterized in that: The human-machine interaction unit includes a card reader and a display screen; a QR code is provided in the display screen; when the main control module receives a card swiping or code scanning charging instruction from the human-machine interaction unit, the circuit breaker is controlled to close.

4. A multi-interface charging pile system with power routing function according to claim 3, characterized in that: The card reader is used to identify the user and transmit the authorized charging permission to the main control module after the user identity verification is passed.

5. A multi-interface charging pile system with power routing function according to claim 3, characterized in that: The electric energy meter is used to collect current and voltage data during the charging and discharging process of the charging gun, and upload the sampled current and voltage data to the main control module for analysis and processing. The main control module transmits the analyzed and processed data to the display screen for display.

6. A multi-interface charging pile system with power routing function according to claim 2, characterized in that: The AC power supply system is used to provide AC power for the charging pile; the DC power supply system is used to provide high-voltage DC power for the charging pile; the energy storage power supply system is used as a backup power supply to supplement electrical energy for the charging pile.

7. A multi-interface charging pile system with power routing function according to claim 2, characterized in that: The main control module performs communication handshake preparation and inspection with the electric vehicle through the communication line in the charging gun, and controls the power conversion module to output relevant output power values ​​after the charging conditions are met.

8. A multi-interface charging pile system with power routing function according to claim 2, characterized in that: The power conversion module includes a PFC power factor correction circuit, a PWM converter module and a DC / DC conversion module.

9. A multi-interface charging pile system with power routing function according to claim 2, characterized in that: The charging gun includes at least two charging gun ports, and the charging gun ports are adapted to the charging ports of the electric vehicle.

10. A multi-interface charging pile system with power routing function according to any one of claims 2 to 9, characterized in that: It also includes a communication module, which is connected to the main control module and is used to achieve remote monitoring and intelligent scheduling of the charging pile through the main control module.

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