A multi-interface charging pile system with power routing function

Abstract

This invention relates to the field of charging equipment technology and discloses a multi-interface charging pile system with power 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 circuit breaker, a current / voltage sampling module, a human-machine interface unit, a charging gun, and an energy meter. The three power supply systems are each connected to the circuit breaker and then to the power conversion module. The power conversion module is connected to the circuit breaker and then to the charging pile. The main control module is connected to the power conversion module, the circuit breaker, the current / voltage sampling module, the human-machine interface module, and the energy meter. The main control module is used to: control the power conversion module to output relevant power values ​​when the charging gun is connected to the electric vehicle; receive voltage data from the current / voltage sampling module and control the connection status of the circuit breaker; and perform billing based on the energy meter readings. This invention can meet the charging needs of different scenarios while ensuring reliable power supply.

Description

TECHNICAL FIELD

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

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

[0003] At present, there are alternating current charging piles and direct current charging piles on the market. The alternating current charging pile directly delivers the alternating current in the power grid to the vehicle-mounted charger of the vehicle through the charging gun, and the vehicle-mounted charger converts the alternating current into direct current and then charges the battery pack, but the charging speed is slow, and it is suitable for charging in places such as homes and workplaces where people stay for a long time. The direct current charging pile converts the alternating current in the power grid into direct current through the power electronic equipment inside the charging pile, and directly delivers it to the battery pack of the vehicle through the charging gun, which has the characteristics of fast charging speed and high efficiency, and is suitable for charging in places such as highway service areas and commercial centers where people stay for a short time. However, in actual application, different vehicles and needs require different charging methods. In this case, the charging pile needs to meet the reliability of power supply and adapt to more types of electric vehicles to meet the charging needs in different scenarios.

[0004] Therefore, a multi-interface charging pile system with electric energy routing function is needed. SUMMARY

[0005] In view of the problem that the existing charging pile in the prior art cannot simultaneously meet the reliability of power supply and the charging needs in different scenarios, the present application provides a multi-interface charging pile system with electric energy routing function, which can simultaneously realize the reliability and applicability of power supply and meet the charging needs of different brands and types of vehicles. The specific technical solutions are as follows:

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

[0007] The main control module is used to: control the power conversion module to output relevant power values ​​after the charging gun is normally connected to the electric vehicle; receive current and voltage data from the current / voltage sampling module, process and analyze them, and control the connection status of the circuit breaker; and perform billing based on the electricity meter readings.

[0008] Preferably, the main control module receives self-sampled voltage data, processes and analyzes the data according to a preset program or user settings, and issues a corresponding control command to disconnect the connected circuit breaker when it determines that the sampled voltage exceeds the set value.

[0009] Preferably, the human-machine interaction unit includes a card reader and a display screen; the display screen has a QR code; when the main control module receives a card swipe or QR code scanning charging command from the human-machine interaction unit, it controls the circuit breaker to close.

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

[0011] Preferably, the energy meter is used to collect current and voltage data during the charging and discharging process of the charging gun, and uploads the sampled current and voltage data to the main control module for analysis and processing. The main control module then 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 to the charging pile; the DC power supply system is used to provide high-voltage DC power to the charging pile; and the energy storage power supply system is used as a backup power source to replenish the charging pile with electrical energy.

[0013] Preferably, the main control module communicates with the electric vehicle via the communication line inside the charging gun to prepare and check for communication. After the charging conditions are met, the main control module controls the power conversion module to output relevant output power values.

[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 ports, which are adapted to the charging port of the electric vehicle.

[0016] Preferably, a multi-interface charging pile system with power routing function further includes a communication module, which is connected to the main control module and is used to remotely monitor and intelligently schedule the charging pile through the main control module.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention discloses a multi-interface charging pile system with power routing capabilities, allowing for free selection of the power supply port and the power receiving port. In charging mode, the system can utilize DC power from the DC system and AC power from the grid to provide acceptable DC power to the electric vehicle's power battery or energy storage battery, thereby charging the vehicle or energy storage device. In discharging mode, the DC power from the electric vehicle's power battery or energy storage battery can be converted and transmitted to the DC system or the grid, enabling power supply to devices in the DC system or discharge to the grid. Simultaneously, the AC power supply system, DC power supply system, and energy storage power supply system of the multi-interface charging pile system are each connected to a circuit breaker and then to one end of the power conversion module. The other end of the power conversion module is connected to the circuit breaker and then to the charging gun. This double-insurance method using two circuit breakers enhances the safety of the charging pile system. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. 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 to scale.

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

[0021] Figure 2 This is a schematic diagram of the DC / DC converter 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 a flowchart illustrating the operation of a multi-interface charging pile system with power routing function according to the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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 "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

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

[0027] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] Please refer to the following examples. Figures 1 to 4 .

[0029] This application provides a multi-interface charging pile system with power 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, several circuit breakers, a current / voltage sampling module, a human-machine interaction unit, a charging gun, and an energy meter; the AC power supply system, DC power supply system, and energy storage power supply system are respectively connected to the circuit breakers and then connected to one end of the power conversion module (e.g., ...). Figure 1 As shown, the DC power supply system is connected to the power conversion module via circuit breaker A, the AC power supply system is connected to the power conversion module via circuit breaker B, and the energy storage power supply system is connected to the power conversion module via circuit breaker C; the other end of the power conversion module is connected to the charging gun via circuit breaker C; the main control module is connected to the power conversion module, the circuit breaker, the current / voltage sampling module, the human-machine interaction module, and the energy meter respectively.

[0030] The main control module is used to: control the power conversion module to output relevant power values ​​after the charging gun is normally connected to the electric vehicle; receive current and voltage data from the current / voltage sampling module, process and analyze them, and control the connection status of the circuit breaker; and perform billing based on the electricity meter readings.

[0031] The AC power supply system provides AC 380V power to the charging piles; the DC power supply system provides DC 750V power; and the energy storage power supply system serves as a backup power source. When the DC power supply system is insufficient or power demand increases, the battery pack releases previously stored energy to supplement the power supply to the charging piles. By setting up both AC and DC power supply systems, various types of charging needs can be met, providing flexible power supply for electric vehicles and other charging devices.

[0032] This invention discloses a multi-interface charging pile system with power routing capabilities, allowing for free selection of power supply and receiving ports. The system enables flexible energy transfer and management between multiple energy nodes. In charging mode, the DC power from the DC system and the AC power from the grid can provide acceptable DC power to the electric vehicle's power battery or energy storage battery, thereby charging the vehicle or energy storage device. In discharging mode, the DC power from the electric vehicle's power battery or energy storage battery can be converted and transmitted to the DC system or the grid, enabling power supply to devices in the DC system or discharge to the grid. Simultaneously, the AC power supply system, DC power supply system, and energy storage power supply system of the multi-interface charging pile system are each connected to a circuit breaker and then to one end of the power conversion module. The other end of the power conversion module is connected to the circuit breaker and then to the charging gun. This double-insurance method using two circuit breakers improves the safety of the charging pile system.

[0033] Specifically, the main control module receives self-sampled voltage data, processes and analyzes the data according to a preset program or user settings, and issues a corresponding control command to disconnect the connected circuit breaker when it determines that the sampled voltage exceeds the set value.

[0034] When the main control module detects that the sampled voltage exceeds the set safety threshold, it can quickly issue a control command to disconnect the connected circuit breaker. This timely response effectively isolates the faulty equipment or circuit from the system, preventing the fault from escalating and reducing its impact on the entire system. Since overvoltage is a common fault in many electrical devices and systems, failure to address it promptly can lead to serious consequences such as equipment damage, performance degradation, or even fires. This control logic of the main control module effectively protects equipment from overvoltage damage by promptly isolating the fault point, extending equipment lifespan, and reducing maintenance costs. Simultaneously, the main control module's control logic can take immediate action upon detecting potential safety hazards, achieving automatic monitoring, analysis, and control of voltage.

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

[0036] Specifically, the human-computer interaction unit includes a card reader and a display screen; the display screen has a QR code; when the main control module receives a card swipe or QR code scanning charging command from the human-computer interaction unit, it controls the circuit breaker to close.

[0037] The card reader is used to identify the user's identity and, once the user's identity is verified, transmits the authorized charging permission to the main control module.

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

[0039] In practice, the card reader can identify the user's identity. After the user's identity is verified, the authorized charging permission is transmitted to the main control module. The main control module stores and records charging information, including key information such as charging time and charging amount. This information will then 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 command by swiping a card or scanning a code and immediately closes the circuit breaker. The main control module communicates with the electric vehicle through the communication line inside the charging gun to prepare and check for communication. After the charging conditions are met, the main control module controls the power conversion module to output the relevant power value. The energy meter measures the amount of electricity charged by the electric vehicle, and the main control module can use this to calculate the bill. After the charging is finished, the user of the charging station is prompted to unplug the charging gun and return it to its original position to wait 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, the electric vehicle will communicate with the DC system, energy storage power supply system and the power grid to understand the power demand. The electric vehicle will adjust its discharge power according to the demand. The electricity meter measures the amount of electricity discharged by the electric vehicle, and the main control module can use this to calculate the bill. After the charging is finished, the user of the charging pile is prompted to unplug the charging gun and return it to its original 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 specific implementations, the DC / DC conversion module used for DC input, such as... Figure 2The schematic diagram of the DC / DC converter module shown illustrates an isolated circuit for DC / DC conversion, with LC acting as a filter circuit. When a DC voltage is input, the DSP chip within the control module outputs four PWM1, PWM2, PWM3, and PWM4 pulse signals to power transistors V1, V2, V3, and V4. The primary and secondary windings of the high-frequency transformer T have magnetic induction capabilities; the high-frequency pulse current in the primary winding induces a high-frequency voltage in the secondary winding. This voltage, through power transistors V5, V6, V7, and V8, inductor L2, and filter capacitor C2, outputs a DC voltage U0, thus charging the DC electric vehicle. The process is similar but in the opposite direction when the vehicle is discharging. For AC input, a PWM converter module is used, such as... Figure 3 The schematic diagram of the PWM converter module shown is as follows. L3, L4, and L5 serve as filters, C3 serves as a voltage regulator, and a PFC power factor correction circuit is used to improve current harmonics and stabilize voltage. The current is then rectified into DC by the rectifier circuit to charge the car. When the car is discharging, the current is inverted into AC by the inverter circuit to feed back to the power grid.

[0044] PFC (Power Factor Correction) primarily controls the waveform of the input current to synchronize it with the input voltage waveform, thereby improving the power factor and reducing harmonic content. The power factor is the ratio of active power to apparent power (total power consumption); a higher power factor results in higher power utilization. PFC circuits can reduce the phase difference between current and voltage, reduce harmonic pollution, and improve electromagnetic compatibility and interference, allowing more electrical energy to be used effectively, reducing power loss during switching, minimizing harmonic generation, and improving system stability and reliability.

[0045] PWM (Pulse Width Modulation) converter modules can change the voltage and current across a load by adjusting the duty cycle of the PWM signal, thereby driving and speed-regulating equipment such as motors. During motor driving and speed regulation, PWM technology can achieve energy-saving effects and improve energy utilization efficiency. When regulating voltage and current, PWM converter modules can reduce the generation of harmonics and reduce pollution to the power grid.

[0046] DC / DC converter modules convert the voltage, current, or power of one DC power source into another. They convert input voltage to an output voltage suitable for load requirements, such as converting high voltage to low voltage or low voltage to higher voltage; they convert input current to output current based on the load's current demand, such as converting high current to low current or low current to higher current; and they can step down / boost power or reduce / increase the efficiency of power delivery to meet the load's power requirements.

[0047] The power conversion module realizes the functions of power conversion, regulation and protection 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 ports, which are adapted to the charging port of the electric vehicle. The charging gun is used to connect the charging pile to the electric vehicle or energy storage device to realize the transmission of electricity.

[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 remotely monitor and intelligently schedule the charging pile through the main control module.

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

[0051] The charging pile system of this invention can also serve as a beneficial supplement to the power grid. During peak grid load periods, electric vehicles or energy storage devices can feed stored energy back to the grid through this charging pile, helping to alleviate grid pressure and achieve peak shaving. During off-peak grid load periods, electric vehicles or energy storage devices can charge from the grid, filling idle periods and thus balancing the grid's supply and demand. Furthermore, this charging pile can also promote the consumption of renewable energy.

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

[0053] It should be noted that you should refer to [link / reference]. Figure 4 The system operation flowchart shows that after the system is initialized, the fault monitoring module detects whether a fault has occurred in the system in real time. When a fault is detected, the fault point is located and the circuit breaker is immediately disconnected to cut off the faulty circuit. Then, the fault is repaired. After the repair is completed, the system resumes operation.

[0054] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of the invention.

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

[0056] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0057] If the integrated unit is implemented as 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A multi-interface charging station system with electrical energy routing functionality, characterized in that, The charging pile comprises an alternating current power supply system, a direct current power supply system, an energy storage power supply system, a master control module, a power conversion module, a plurality of circuit breakers, a current / voltage sampling module, a man-machine interaction unit, a charging gun and an electric energy meter. The master control module is configured to control the power conversion module to output relevant power values when the charging gun is normally connected to an electric vehicle, receive current and voltage data from the current / voltage sampling module, process and analyze the data, and control the connection state of the circuit breakers, and charge according to the electric energy metering of the electric energy meter. The master control module processes and analyzes the data according to a preset program or user settings by receiving self-sampling voltage data, and sends a control instruction to cut off the connected circuit breaker when it is determined that the sampling voltage exceeds a set value. The man-machine interaction unit comprises a card reader and a display screen, and the display screen is provided with a two-dimensional code. The master control module controls the circuit breakers to be closed when it receives a card swiping or code scanning charging instruction from the man-machine interaction unit.

2. The multi-interface charging pile system with electric energy routing function according to claim 1, characterized in that, The power conversion module comprises a PFC power factor correction circuit, a PWM inverter module and a DC / DC conversion module.

3. The multi-interface charging pile system with electric energy routing function according to claim 1, characterized in that, The card reader is configured to identify the identity of a user and transmit authorized charging permissions to the master control module when the user identity is verified.

4. The multi-interface charging pile system with electric energy routing function according to claim 1, characterized in that, The electric energy meter is configured to collect current and voltage data during the charging and discharging process of the charging gun, upload the sampled current and voltage data to the master control module for analysis and processing, and transmit the analyzed and processed data to the display screen for display.

5. The multi-interface charging pile system with electric energy routing function according to claim 1, characterized in that, The alternating current power supply system is configured to provide alternating current power for the charging pile, the direct current power supply system is configured to provide high-voltage direct current power for the charging pile, and the energy storage power supply system is configured as a backup power supply for supplementing the charging pile with electric energy.

6. The multi-interface charging pile system with electric energy routing function according to claim 1, characterized in that, The master control module communicates with the electric vehicle through a communication line in the charging gun to prepare for and check the charging conditions, and controls the power conversion module to output relevant output power values when the charging conditions are met.

7. The multi-interface charging pile system with electric energy routing function according to any one of claims 2-6, characterized in that, The charging gun comprises at least two charging gun ports which are adapted to the charging ports of the electric vehicle. The charging pile further comprises a communication module connected to the master control module, which is configured to realize remote monitoring and intelligent scheduling of the charging pile through the master control module.

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