Matrix split type direct current charging pile and power distribution method thereof

Abstract

The invention relates to the technical field of charging piles, and discloses a matrix split type direct current charging pile and a power distribution method thereof, and the charging pile comprises a power control unit which is configured to control the power output of the charging pile according to the connection information of a charging gun; the charging module unit is connected with the power control unit, the matrix power distribution unit is connected with the charging module unit, the matrix power distribution unit is controlled by a power distribution mainboard, direct-current electric energy output by the charging module unit is switched to a required direct-current bus, and the direct-current electric energy is conducted to a charging gun of a terminal cabinet through a high-voltage cable to charge a vehicle end; the terminal control unit is connected with the matrix power distribution unit; and the man-machine interaction unit is connected with the power control unit. According to the invention, the output of the power of the charging pile can be accurately controlled according to the connection information of the charging gun, efficient distribution of electric energy is realized, the charging process is optimized, the phenomenon of unbalanced power output in a traditional charging pile is avoided, and the charging efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a matrix split-type direct current charging pile and a power distribution method thereof. Background Art

[0002] The electric vehicle market is growing rapidly, the charging technology of new energy vehicles is updating quickly, and the demand for charging is increasing. Traditional charging pile solutions have fixed power, low charging efficiency, and no future expansion, making it difficult to meet future charging market demand.

[0003] Integrated DC charging piles are generally divided into single-gun and double-gun types. At present, the power demand for vehicle charging in the market is developing towards high power. The current vehicle charging power will be limited by the rated power of the charging pile (except for vehicles with low power demand), which will affect the charging speed. Vehicles with high power demand cannot use the resources of empty charging piles, which will result in low charging efficiency and slow charging speed; waste charging pile materials and prolong the investment return cycle.

[0004] Therefore, it is necessary to provide a matrix split DC charging stack and a power distribution method thereof to solve the problem of low charging efficiency of the charging stack in the prior art. Summary of the invention

[0005] In view of this, the present invention proposes a matrix split DC charging stack and a power distribution method thereof, aiming to solve the problem of low charging efficiency of the charging stack in the prior art.

[0006] On the one hand, the present invention provides a matrix split DC charging stack, comprising:

[0007] A power control unit, configured to control the output of the charging stack power according to the connection information of the charging gun;

[0008] A charging module unit, connected to the power control unit, and used for outputting electric energy;

[0009] A matrix power distribution unit is connected to the charging module unit. The matrix power distribution unit is controlled by the power distribution mainboard, and switches the DC power output by the charging module unit to the required DC bus, and transmits it to the charging gun of the terminal cabinet through a high-voltage cable to charge the vehicle end.

[0010] A terminal control unit is connected to the matrix power distribution unit. The terminal control unit is provided with a plurality of charging terminals. The main control board of the terminal control unit communicates with the vehicle end to collect the information of the power required by the vehicle end and transmits it to the cloud platform, so that the cloud platform and the power distribution main board can control the output on and off, information collection, insulation detection and energy transmission of the charging stack in real time, and display the control information through the terminal display screen;

[0011] A human-computer interaction unit is connected to the power control unit, and the human-computer interaction unit includes a display screen, a card reader and an indicator light; the human-computer interaction unit is configured to display information, set and modify charging parameters through the display screen, display the current charging pile status through the indicator light, and read the card information through the card reader;

[0012] An AC input unit is connected to the charging module unit, and the AC input unit is used to provide electrical isolation and circuit protection for the charging module.

[0013] Furthermore, the matrix split DC charging stack also includes:

[0014] A lightning protection unit connected to the AC input unit;

[0015] An auxiliary unit, connected to the power control unit, and used to connect each unit circuit;

[0016] The security unit is connected to the power control unit, the charging module unit, the matrix power distribution unit, the terminal control unit, the AC input unit, the lightning protection unit, the human-computer interaction unit and the auxiliary unit. The security unit is used to perform circuit protection for each unit connected thereto.

[0017] Furthermore, when the power control unit is configured to control the output of the charging stack power according to the connection information of the charging gun, it includes:

[0018] Collecting the connection information and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode;

[0019] Among them, the connection information includes the number of charging guns used and the usage time of each vehicle end; the charging mode includes an equalizing charging mode, a primary and secondary charging mode and at least one module charging mode.

[0020] Furthermore, the collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes:

[0021] If the charging mode is an equalizing charging mode, the number of charging guns used in the charging stack is collected;

[0022] Calculate the output power of each charging gun; wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack;

[0023] The electrical energy of the charging stack is distributed and output according to the output power of each charging gun.

[0024] Furthermore, the collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes:

[0025] If the charging mode is a primary and secondary charging mode, the usage time of each vehicle terminal is collected and the usage time of each vehicle terminal is arranged in descending order;

[0026] The charging gun connected to the vehicle end with the shortest usage time is used as the secondary charging gun, and the charging guns other than the secondary charging gun are used as the main charging gun;

[0027] Setting the minimum output power of the charging stack, and allocating the minimum output power of the charging stack to the secondary charging gun;

[0028] The remaining charging stack output power is calculated, the remaining charging stack output power is evenly divided to obtain a main average output power, and the main average output power is distributed to the main charging gun.

[0029] Furthermore, the collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes:

[0030] If the charging mode is at least one module charging mode, the usage time of each vehicle terminal is collected, and the usage time of each vehicle terminal is arranged in descending order, and the power input priority of each vehicle terminal decreases as the usage time of each vehicle terminal decreases;

[0031] Calculate the output power of each charging gun, wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack;

[0032] If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority.

[0033] Furthermore, if there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is distributed to the charging gun connected to the vehicle end according to the input priority, including:

[0034] If there is a charging gun that is not connected to the vehicle, the output power of the charging gun is allocated to the charging gun with the highest input priority;

[0035] If there are at least two charging guns not connected to the vehicle, count the number of charging guns not connected to the vehicle, and distribute the output power of the charging guns not connected to the vehicle to the charging guns connected to the vehicle in descending order according to the input priority;

[0036] Among them, the output power of a charging gun that is not connected to the vehicle end is allocated to a charging gun that is connected to the vehicle end.

[0037] Furthermore, the communication protocol of the charging stack includes:

[0038] CAN2.0 communication, RS485 communication and RS232 communication.

[0039] Furthermore, the communication protocol of the charging stack includes:

[0040] The matrix power distribution unit communicates with the charging module unit and the terminal control unit using CAN2.0;

[0041] The terminal control unit communicates with the vehicle-side BMS using CAN2.0;

[0042] The terminal control unit communicates with the electric energy meter using RS485;

[0043] The terminal control unit communicates with the display screen and the card reader using RS232;

[0044] The matrix power distribution unit communicates with the display screen using RS232.

[0045] On the other hand, the present application also provides a matrix split DC charging stack power distribution method, comprising:

[0046] Collect the connection information of the charging gun and the pre-set charging mode, and control the distribution and output of the charging stack power according to the connection information and the charging mode; wherein the connection information of the charging gun includes the number of charging guns used and the usage time of each vehicle end; the charging mode includes an equalizing charging mode, a primary and secondary charging mode, and at least one module charging mode;

[0047] If the charging mode is the equalized charging mode, the number of charging guns used in the charging stack is collected; the output power of each charging gun is calculated; wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack; the electric energy of the charging stack is distributed and output according to the output power of each charging gun;

[0048] If the charging mode is a primary and secondary charging mode, collect the usage time of each vehicle end and arrange the usage time of each vehicle end in descending order; use the charging gun connected to the vehicle end with the shortest usage time as the secondary charging gun, and use the charging gun connected to the vehicle end with the shortest usage time as the primary charging gun; set the minimum output power of the charging stack, and allocate the minimum output power of the charging stack to the secondary charging gun; calculate the remaining output power of the charging stack, divide the remaining output power of the charging stack equally to obtain the main average output power, and allocate the main average output power to the main charging gun;

[0049] If the charging mode is at least one module charging mode, the usage time of each vehicle end is collected and arranged in descending order. The power input priority of each vehicle end decreases as the usage time of each vehicle end decreases. The output power of each charging gun is calculated, where the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack. If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows: first, through the cooperation of the power control unit and the matrix power distribution unit, the present invention can accurately control the output of the charging pile power according to the connection information of the charging gun, realize the efficient distribution of electric energy, optimize the charging process, avoid the imbalance of power output in the traditional charging pile, and improve the charging efficiency. Secondly, the diversification of charging modes provides a flexible way of distributing power, ensuring that the vehicle end with different charging needs can obtain the best charging power, improving the charging efficiency and extending the service life of the equipment. In particular, in the primary and secondary charging mode, by dynamically distributing power according to the use time of the vehicle end, the charging needs of the high-priority vehicle end can be prioritized, and the power of the secondary charging gun can be reasonably distributed to avoid resource waste. The matrix power distribution technology can also realize on-demand distribution according to the needs of different modules, further improving the scalability and flexibility of the system. In addition, the intelligent design of the human-computer interaction unit and the terminal control unit enables users to monitor the charging status in real time, obtain relevant data, and realize remote control through the cloud platform, further enhancing the intelligent management and operation convenience of the system, and having high practical value and technological advancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0052] Figure 1 A system schematic diagram of a matrix split DC charging stack provided in an embodiment of the present invention;

[0053] Figure 2 A schematic diagram of a matrix power distribution unit provided in an embodiment of the present invention;

[0054] Figure 3 A flowchart of the use of a matrix split DC charging stack provided in an embodiment of the present invention;

[0055] Figure 4A flow chart of a matrix split DC charging stack power distribution method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] In some embodiments of the present application, see Figure 1-2 As shown, Figure 1 A system schematic diagram of a matrix split DC charging stack provided in an embodiment of the present invention; Figure 2 The schematic diagram of the matrix power distribution unit provided in the embodiment of the present invention; this embodiment provides a matrix split DC charging stack, including:

[0058] A power control unit, configured to control the output of the charging stack power according to the connection information of the charging gun;

[0059] A charging module unit is connected to the power control unit, and the charging module unit is used to output electric energy;

[0060] The matrix power distribution unit is connected to the charging module unit. The matrix power distribution unit is controlled by the power distribution mainboard, and switches the DC power output by the charging module unit to the required DC bus, and transmits it to the charging gun of the terminal cabinet through a high-voltage cable to charge the vehicle end.

[0061] The terminal control unit is connected to the matrix power distribution unit. The terminal control unit is provided with a number of charging terminals. The main control board of the terminal control unit communicates with the vehicle end to collect the information on the power required by the vehicle end and transmits it to the cloud platform, so that the cloud platform and the power distribution main board can control the output on and off, information collection, insulation detection and energy transmission of the charging pile in real time, and display the control information on the terminal display screen;

[0062] A human-machine interaction unit is connected to the power control unit, and the human-machine interaction unit includes a display screen, a card reader and an indicator light; the human-machine interaction unit is configured to display information, set and modify charging parameters through the display screen, display the current charging pile status through the indicator light, and read the card information through the card reader;

[0063] The AC input unit is connected to the charging module unit, and is used to provide electrical isolation and circuit protection for the charging module.

[0064] It can be understood that the matrix split DC charging pile design of this embodiment optimizes the charging efficiency and system reliability in many aspects. First, the power control unit accurately adjusts the power output of the charging pile according to the connection information of the charging gun, ensuring efficient distribution of electric energy and avoiding overload or power waste. The collaboration between the charging module unit and the matrix power distribution unit enables the DC power of the charging pile to be accurately switched to different DC buses and transmitted to the terminal cabinet through high-voltage cables, realizing flexible charging requirements for multiple vehicle ends. Secondly, the terminal control unit can collect the power demand information of the vehicle end in real time and dynamically monitor and control it through the cloud platform, realizing remote management, status display and fault alarm of the charging pile, greatly improving the intelligence and operation convenience of the system. The human-computer interaction unit realizes multifunctional interaction of information display, parameter setting and status indication through devices such as display screens, card readers and indicator lights, which not only enhances the user experience, but also improves the operability and safety of the system. The AC input unit provides electrical isolation and circuit protection for the charging module unit, ensuring the stable operation of the system in a complex electrical environment. Overall, this embodiment provides an efficient, safe, and intelligent charging solution that adapts to diverse charging needs, while also improving the reliability and flexibility of the system, and is in line with the development trend of modern electric vehicle charging infrastructure.

[0065] Specifically, see Figure 3 , the user scans the code or swipes the card to start charging, the operation platform receives the start-up request, and the platform sends a start-up charging command to the terminal control unit. During the charging process, the charging stack dynamically calls the idle charging module to start the output power according to the battery charging demand of the vehicle end, the power distribution unit according to the load status, and the predetermined control strategy, and at the same time controls the output of the matrix power distribution unit, and outputs it to the vehicle end through the charging gun. The terminal control unit will transmit the vehicle end demand information to the power distribution unit in real time so that the power distribution unit can dynamically adjust the output power.

[0066] In some embodiments of the present application, the matrix split DC charging stack further includes:

[0067] A lightning protection unit connected to the AC input unit;

[0068] An auxiliary unit is connected to the power control unit, and the auxiliary unit is used to connect each unit circuit;

[0069] The security unit is connected to the power control unit, the charging module unit, the matrix power distribution unit, the terminal control unit, the AC input unit, the lightning protection unit, the human-computer interaction unit and the auxiliary unit. The security unit is used to provide circuit protection for each unit connected thereto.

[0070] It can be understood that this embodiment further enhances the safety and reliability of the matrix split DC charging pile by introducing a lightning protection unit, an auxiliary unit and a security unit. The lightning protection unit effectively protects the charging pile from the impact of power emergencies such as lightning, ensuring that the equipment can still operate safely under severe weather conditions. With the assistance of the power control unit, the auxiliary unit realizes the effective connection and coordination of each circuit unit, and improves the overall stability of the system. The security unit provides comprehensive circuit protection for all connected units of the system, and can automatically cut off the power supply in the event of an electrical fault, preventing equipment damage and personal injury, while ensuring the safety of users and charging equipment. In addition, the comprehensive protection function of the security unit enhances the system's fault response capability and ensures continuous and stable operation during the charging process. Overall, these new features make the charging pile safer and more reliable in the face of various external risks and internal faults, improving the long-term operating life of the system and the trust of users.

[0071] In some embodiments of the present application, when the power control unit is configured to control the output of the charging stack power according to the connection information of the charging gun, it includes:

[0072] Collect connection information and pre-set charging mode, and control the distribution and output of charging stack power according to the connection information and charging mode;

[0073] Among them, the connection information includes the number of charging guns used and the usage time of each vehicle end; the charging modes include equalizing charging mode, primary and secondary charging mode and at least one module charging mode.

[0074] It can be understood that this embodiment can achieve more flexible and efficient power distribution by dynamically controlling the output of the charging stack power according to the connection information of the charging gun and the preset charging mode. The number of charging guns used and the length of time the vehicle is used as connection information can help to accurately understand the charging needs of each vehicle, and intelligently adjust the power output according to different charging modes. In the equalizing charging mode, the power of all charging guns is evenly distributed to ensure charging fairness; in the primary and secondary charging mode, the resource utilization during the charging process is optimized by giving priority to meeting the needs of the vehicle with a longer usage time; at least one module charging mode further provides flexibility to adapt to different charging needs. This solution not only improves the charging efficiency, but also dynamically adjusts the power distribution according to the actual situation, avoiding problems such as overload and power waste that may occur during the charging process, and greatly improves the intelligence and reliability of the system.

[0075] In some embodiments of the present application, when collecting connection information and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, it includes:

[0076] If the charging mode is equalization charging mode, the number of charging guns used in the charging pile is collected;

[0077] Calculate the output power of each charging gun; the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack;

[0078] The electrical energy of the charging stack is distributed and output according to the output power of each charging gun.

[0079] It is understandable that when the equalized charging mode is adopted, by collecting the number of charging guns in use and calculating the output power of each charging gun, it is ensured that each charging gun obtains the same output power, thereby achieving fair distribution of power. This method effectively avoids the imbalance of power distribution, ensures that multiple vehicle ends can enjoy equal charging power when charging, and optimizes the energy utilization rate during the charging process. At the same time, by controlling the total output power of all charging guns not to exceed the maximum output power of the charging stack, overload is avoided and the safety and stability of the system are improved. This solution improves the operating efficiency and charging fairness of the charging stack, and is especially suitable for scenarios where multiple vehicle ends are charged at the same time, ensuring that all charging equipment can work efficiently and stably.

[0080] Specifically, the default is 1Q=M1, 2Q=M2, ..., 6Q=M6 (1Q=1 gun, M1=1 group of modules, 1M is the adjusted bus current); charging with 1 gun requires BMS>M1, M1+M2+M3, provided that M2 and M3 are idle, and so on.

[0081] In some embodiments of the present application, when collecting connection information and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, it includes:

[0082] If the charging mode is a primary and secondary charging mode, the usage time of each vehicle terminal is collected and arranged in descending order;

[0083] The charging gun connected to the vehicle end with the shortest usage time is used as the secondary charging gun, and the charging guns other than the secondary charging gun are used as the main charging gun;

[0084] Set the minimum output power of the charging stack and allocate the minimum output power of the charging stack to the secondary charging gun;

[0085] Calculate the remaining charging stack output power, divide the remaining charging stack output power equally to obtain the main average output power, and distribute the main average output power to the main charging gun.

[0086] It can be understood that in this embodiment, when the main and secondary charging mode is adopted, by arranging each vehicle end in descending order according to the length of use, it is ensured that the charging resources are preferentially allocated to the vehicle end with a longer use time, thereby realizing the priority management of charging. By allocating the vehicle end with the shortest use time as the secondary charging gun, it is ensured that the secondary charging gun obtains the minimum output power of the charging pile, avoiding the secondary charging gun from occupying too much system resources. At the same time, the main charging gun obtains an equal share of the remaining power, ensuring a more balanced distribution of charging power among multiple vehicle ends. This solution can flexibly adjust the charging power, which not only optimizes the charging efficiency, but also avoids waste of resources, and improves the overall performance and fairness of the system. Through this intelligent allocation mechanism, it not only meets the charging needs of the vehicle end that is used for a long time, but also reasonably controls the power output of the secondary charging gun, avoids unbalanced power distribution, and improves the charging efficiency and user experience of the system.

[0087] In some embodiments of the present application, when collecting connection information and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, it includes:

[0088] If the charging mode is at least one module charging mode, the usage time of each vehicle terminal is collected, and the usage time of each vehicle terminal is arranged in descending order, and the power input priority of each vehicle terminal decreases in sequence as the usage time of each vehicle terminal decreases;

[0089] Calculate the output power of each charging gun, where the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack;

[0090] If there is a charging gun that is not connected to the vehicle, the output power of the charging gun will be allocated to the charging gun connected to the vehicle according to the input priority.

[0091] It can be understood that in this embodiment, when at least one module charging mode is adopted, the power input priority of each vehicle end can be dynamically adjusted by arranging them in descending order according to the length of time the vehicle end is used, ensuring that the vehicle end connected for a long time obtains a higher power priority, thereby achieving a more reasonable allocation of charging resources. At the same time, by calculating the output power of each charging gun and ensuring that its sum does not exceed the maximum output power of the charging stack, it is ensured that the charging stack will not be overloaded and can fully utilize the available power. If there is a charging gun that is not connected to the vehicle end, the system will reallocate the output power of the unconnected charging gun according to the power input priority of the vehicle end to optimize the distribution of electric energy. This intelligent power allocation mechanism not only improves the overall performance of the charging stack, but also enhances the flexibility and adaptability of the system, ensuring that the charging needs of each vehicle end during the charging process are reasonably met and power waste is avoided.

[0092] 1 gun is charging, 1 gun has put into operation the module (1M=M1+M2+M3); 2 guns are plugged in for charging, it is detected that M2 has been put into the 1M bus, at this time 1M=M1-M2+M3, 2M=M2, check whether the module resources M4, M5, and M6 are idle, and prioritize putting module resources into 1M, judge whether the 2M current meets the charging demand of 2 guns and is less than the demand, and put the idle module into 2M, and so on.

[0093] When 4 charging guns are charging at the same time, the highest priority (1Q=M1, 3Q=M3, 5Q=M5, 6Q=M6), the remaining M2 and M4 resources are adjusted to the charging guns with high priority (the order of charging determines the charging priority of each charging gun; among them, the earlier the charging gun is put into charging, the higher the priority. When it is detected that the charging gun with high priority has completed charging and disconnected, the priority of other charging guns will be increased accordingly. When it is detected that the charging demand of a certain charging gun has decreased, the idle output power will be allocated to other charging guns that cannot meet the charging demand and have higher priority.) And so on.

[0094] When there are 6 charging guns with simultaneous charging requirements, 1Q = M1, 2Q = M2, 3Q = M3, 4Q = M4, 5Q = M5, 6Q = M6, and no power adjustment is performed. When 6 guns are charging at the same time, and one of them is fully charged, the module of this gun is withdrawn and is preferentially allocated to the charging gun that needs to increase module resources (the charging priority of each charging gun is determined by the order in which they are put into charging), and so on.

[0095] In some embodiments of the present application, if there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority, including:

[0096] If there is a charging gun that is not connected to the vehicle, the output power of the charging gun is allocated to the charging gun with the highest input priority;

[0097] If there are at least two charging guns not connected to the vehicle, count the number of charging guns not connected to the vehicle, and distribute the output power of the charging guns not connected to the vehicle to the charging guns connected to the vehicle in descending order according to the input priority;

[0098] Among them, the output power of a charging gun that is not connected to the vehicle end is allocated to a charging gun that is connected to the vehicle end.

[0099] It can be understood that the power utilization efficiency of the charging stack is maximized by intelligently allocating the output power of the charging guns that are not connected to the vehicle. When only one charging gun is not connected to the vehicle, its power is allocated to the charging gun with the highest input priority, ensuring that the vehicle with priority charging can obtain more power; if there are multiple charging guns not connected to the vehicle, the number of unconnected charging guns is counted, and the power is allocated in order according to the input priority, so as to reasonably allocate the charging resources. This allocation method optimizes the charging process of each vehicle. The output power of each unconnected charging gun is reasonably allocated to the charging guns that are connected to the vehicle, ensuring that the charging efficiency of the connected vehicle is maximized, while avoiding unnecessary power waste, and improving the overall resource utilization of the charging stack and the stability of the system. This flexible power allocation method enhances the intelligent management of the system and the fairness of the charging process.

[0100] In some embodiments of the present application, the communication protocol of the charging stack includes:

[0101] CAN2.0 communication, RS485 communication and RS232 communication.

[0102] In some embodiments of the present application, the communication protocol of the charging stack includes:

[0103] The matrix power distribution unit, charging module unit and terminal control unit all use CAN2.0 communication;

[0104] The terminal control unit and the vehicle-side BMS use CAN2.0 communication;

[0105] The terminal control unit and the electric energy meter use RS485 communication;

[0106] The terminal control unit communicates with the display screen and card reader using RS232;

[0107] The matrix power distribution unit and the display screen use RS232 communication.

[0108] It is understandable that in this embodiment, by adopting multiple communication protocols such as CAN2.0, RS485 and RS232, efficient and stable data transmission between various units of the charging pile is achieved. The CAN2.0 protocol is widely used in the communication between the matrix power distribution unit, the charging module unit and the terminal control unit. It has high reliability and anti-interference ability, is suitable for use in complex electrical systems, and ensures real-time data exchange and coordinated control between various modules of the charging pile. At the same time, the terminal control unit and the vehicle-side BMS use CAN2.0 communication to ensure real-time data transmission of the vehicle-side battery management system, so that the charging process can be dynamically adjusted according to the actual needs of the vehicle. The RS485 protocol is used for communication between the terminal control unit and the electric energy meter, supports long-distance and stable data transmission, and is suitable for power metering and monitoring. The RS232 protocol is used for communication between the terminal control unit and the display screen and the card reader, ensuring the interactive function between the user and the system, and facilitating the setting of charging parameters and status display. The matrix power distribution unit and the display screen use the RS232 protocol to ensure the real-time display of the system status and data synchronization. Overall, through the collaborative work of multiple communication protocols, this system can achieve flexible and efficient data exchange between different devices, improve the intelligent management and operation convenience of the charging pile, and at the same time ensure the reliability and stability of data transmission.

[0109] On the other hand, see Figure 3 As shown, the present application also provides a matrix split DC charging pile power distribution method, which is applied to the above-mentioned matrix split DC charging pile, comprising the following steps:

[0110] S100, collecting connection information of the charging gun and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode; wherein the connection information of the charging gun includes the number of charging guns used and the length of time each vehicle end is used; the charging mode includes an equalizing charging mode, a primary and secondary charging mode, and at least one module charging mode;

[0111] S200. If the charging mode is the equalized charging mode, the number of charging guns used in the charging stack is collected; the output power of each charging gun is calculated; wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack; the electric energy of the charging stack is distributed and output according to the output power of each charging gun;

[0112] S300. If the charging mode is a primary and secondary charging mode, collect the usage time of each vehicle end and arrange the usage time of each vehicle end in descending order; use the charging gun connected to the vehicle end with the shortest usage time as the secondary charging gun, and use the charging gun connected to the vehicle end with the shortest usage time as the primary charging gun; set the minimum output power of the charging stack, and allocate the minimum output power of the charging stack to the secondary charging gun; calculate the remaining output power of the charging stack, divide the remaining output power of the charging stack equally to obtain the main average output power, and allocate the main average output power to the main charging gun;

[0113] S300. If the charging mode is at least one module charging mode, the usage time of each vehicle end is collected, and the usage time of each vehicle end is arranged in descending order. The power input priority of each vehicle end decreases as the usage time of each vehicle end decreases. The output power of each charging gun is calculated, wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack. If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority.

[0114] It can be understood that the present application significantly improves the charging efficiency and resource utilization through flexible charging modes and intelligent power scheduling. In the equalized charging mode, the output power of all charging guns is equal, which ensures the fairness of power distribution during the charging process and effectively avoids power waste. In the primary and secondary charging mode, by giving priority to providing more charging power to the vehicle end with a longer usage time according to the usage time of the vehicle end, the rationality and efficiency of charging are ensured, and excessive occupation of resources by low-priority vehicle ends is avoided. When the module charging mode is adopted, by adjusting the power input priority according to the usage time of the vehicle end, not only the charging needs of multiple vehicle ends are reasonably allocated, but also the power of the charging guns that are not connected to the vehicle end is fully utilized, the power distribution is optimized, and the overall efficiency and flexibility of the system are improved. This intelligent power allocation mechanism can be dynamically adjusted according to different charging needs to ensure that the maximum output power of the charging stack is fully utilized, while avoiding resource waste and improving the safety, reliability and user experience of the system.

[0115] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0116] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0119] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A matrix split DC charging stack, characterized in that: include: A power control unit, configured to control the output of the charging stack power according to the connection information of the charging gun; A charging module unit, connected to the power control unit, and used for outputting electric energy; A matrix power distribution unit is connected to the charging module unit. The matrix power distribution unit is controlled by the power distribution mainboard, and switches the DC power output by the charging module unit to the required DC bus, and transmits it to the charging gun of the terminal cabinet through a high-voltage cable to charge the vehicle end. A terminal control unit is connected to the matrix power distribution unit. The terminal control unit is provided with a plurality of charging terminals. The main control board of the terminal control unit communicates with the vehicle end to collect the information of the power required by the vehicle end and transmits it to the cloud platform, so that the cloud platform and the power distribution main board can control the output on and off, information collection, insulation detection and energy transmission of the charging stack in real time, and display the control information through the terminal display screen; A human-computer interaction unit is connected to the power control unit, and the human-computer interaction unit includes a display screen, a card reader and an indicator light; the human-computer interaction unit is configured to display information, set and modify charging parameters through the display screen, display the current charging pile status through the indicator light, and read the card information through the card reader; An AC input unit is connected to the charging module unit, and the AC input unit is used to provide electrical isolation and circuit protection for the charging module.

2. The matrix split type DC charging stack according to claim 1, characterized in that: The matrix split type DC charging stack also includes: A lightning protection unit connected to the AC input unit; An auxiliary unit, connected to the power control unit, and used to connect each unit circuit; The security unit is connected to the power control unit, the charging module unit, the matrix power distribution unit, the terminal control unit, the AC input unit, the lightning protection unit, the human-computer interaction unit and the auxiliary unit. The security unit is used to perform circuit protection for each unit connected thereto.

3. The matrix split type DC charging stack according to claim 2, characterized in that: When the power control unit is configured to control the output of the charging stack power according to the connection information of the charging gun, it includes: Collecting the connection information and a preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode; Among them, the connection information includes the number of charging guns used and the usage time of each vehicle end; the charging mode includes an equalizing charging mode, a primary and secondary charging mode and at least one module charging mode.

4. The matrix split type DC charging stack according to claim 3, characterized in that: The collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes: If the charging mode is an equalizing charging mode, the number of charging guns used in the charging stack is collected; Calculate the output power of each charging gun; wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack; The electrical energy of the charging stack is distributed and output according to the output power of each charging gun.

5. The matrix split type DC charging stack according to claim 3, characterized in that: The collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes: If the charging mode is a primary and secondary charging mode, the usage time of each vehicle terminal is collected and the usage time of each vehicle terminal is arranged in descending order; The charging gun connected to the vehicle end with the shortest usage time is used as the secondary charging gun, and the charging guns other than the secondary charging gun are used as the main charging gun; Setting the minimum output power of the charging stack, and allocating the minimum output power of the charging stack to the secondary charging gun; The remaining charging stack output power is calculated, the remaining charging stack output power is evenly divided to obtain a main average output power, and the main average output power is distributed to the main charging gun.

6. The matrix split type DC charging stack according to claim 3, characterized in that: The collecting of the connection information and the preset charging mode, and controlling the distribution and output of the charging stack power according to the connection information and the charging mode, includes: If the charging mode is at least one module charging mode, the usage time of each vehicle terminal is collected, and the usage time of each vehicle terminal is arranged in descending order, and the power input priority of each vehicle terminal decreases as the usage time of each vehicle terminal decreases; Calculate the output power of each charging gun, wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack; If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority.

7. The matrix split type DC charging stack according to claim 6, characterized in that: If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is distributed to the charging gun connected to the vehicle end according to the input priority, including: If there is a charging gun that is not connected to the vehicle, the output power of the charging gun is allocated to the charging gun with the highest input priority; If there are at least two charging guns not connected to the vehicle, count the number of charging guns not connected to the vehicle, and distribute the output power of the charging guns not connected to the vehicle to the charging guns connected to the vehicle in descending order according to the input priority; Among them, the output power of a charging gun that is not connected to the vehicle end is allocated to a charging gun that is connected to the vehicle end.

8. The matrix split type DC charging stack according to claim 2, characterized in that: The communication protocol of the charging stack includes: CAN2.0 communication, RS485 communication and RS232 communication.

9. The matrix split type DC charging stack according to claim 8, characterized in that: The communication protocol of the charging stack includes: The matrix power distribution unit communicates with the charging module unit and the terminal control unit using CAN2.0; The terminal control unit communicates with the vehicle-side BMS using CAN2.0; The terminal control unit communicates with the electric energy meter using RS485; The terminal control unit communicates with the display screen and the card reader using RS232; The matrix power distribution unit communicates with the display screen using RS232.

10. A matrix split DC charging pile power distribution method, applied to the matrix split DC charging pile according to any one of claims 1 to 9, characterized in that: include: Collect the connection information of the charging gun and the pre-set charging mode, and control the distribution and output of the charging stack power according to the connection information and the charging mode; wherein the connection information of the charging gun includes the number of charging guns used and the usage time of each vehicle end; the charging mode includes an equalizing charging mode, a primary and secondary charging mode, and at least one module charging mode; If the charging mode is the equalized charging mode, the number of charging guns used in the charging stack is collected; the output power of each charging gun is calculated; wherein the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack; the electric energy of the charging stack is distributed and output according to the output power of each charging gun; If the charging mode is a primary and secondary charging mode, collect the usage time of each vehicle end and arrange the usage time of each vehicle end in descending order; use the charging gun connected to the vehicle end with the shortest usage time as the secondary charging gun, and use the charging gun connected to the vehicle end with the shortest usage time as the primary charging gun; set the minimum output power of the charging stack, and allocate the minimum output power of the charging stack to the secondary charging gun; calculate the remaining output power of the charging stack, divide the remaining output power of the charging stack equally to obtain the main average output power, and allocate the main average output power to the main charging gun; If the charging mode is at least one module charging mode, the usage time of each vehicle end is collected and arranged in descending order. The power input priority of each vehicle end decreases as the usage time of each vehicle end decreases. The output power of each charging gun is calculated, where the output power of each charging gun is the same, and the sum of the output power of all charging guns is the maximum output power of the charging stack. If there is a charging gun that is not connected to the vehicle end, the output power of the charging gun is allocated to the charging gun connected to the vehicle end according to the input priority.

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