An electric vehicle charging pile

Abstract

The utility model relates to new energy equipment technical field, specifically disclose a kind of electric vehicle charging pile, including two charging pile main cabinets and control terminal, the output of charging pile main cabinet is all installed with PDU output module, two PDU output modules are electrically connected between, PDU output module is also connected with control terminal communication, the input of any charging pile main cabinet is equipped with first distribution circuit and second distribution circuit, first distribution circuit is installed with first star topology distribution module between the output of charging pile main cabinet, second distribution circuit is installed with second star topology distribution module between the output of charging pile main cabinet, the output of first star topology distribution module and the output of second star topology distribution module between using ring type topology network connection.The utility model has solved the problem that the delay between the module of traditional modularization charging pile is high when expanding, power distribution is uneven, reduces the overall working efficiency of charging pile after expansion.

Description

Technical Field

[0001] This application relates to the field of new energy equipment technology, and specifically discloses an electric vehicle charging stack. Background Technology

[0002] Power distribution in charging piles is a core component of electric vehicle charging systems. Its significance extends beyond technical aspects, profoundly impacting operational efficiency, user experience, grid stability, and industry development. Ring bridge connections are a common topology for power distribution in charging piles. Characterized by DC contactors for power distribution connected end-to-end in a ring sequence, forming a closed loop, the core of which lies in achieving flexible combination and dynamic power distribution of charging modules through a ring-shaped physical structure and intelligent control algorithms. As charging pile power increases, the number of power modules also increases, necessitating capacity expansion. Current charging pile expansion requires modifying the entire power grid or redesigning the power distribution system, resulting in high costs and long development cycles. For example, expanding a 480kW charging pile to 960kW typically requires additional independent equipment and cannot be directly integrated into a grid. While existing modular charging pile designs support expansion, high inter-module communication latency and uneven power distribution lead to overall efficiency below theoretical values ​​after grid integration. Therefore, the inventors have developed an electric vehicle charging pile to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a flexible and scalable electric vehicle charging pile, which solves the problems of high latency and uneven power distribution between modules in traditional modular charging piles when expanding their capacity, thus reducing the overall working efficiency of the charging pile after expansion.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electric vehicle charging pile, comprising two charging pile main cabinets that can be connected in parallel for expanding the capacity of the electric vehicle charging pile and a control terminal. Each charging pile main cabinet has a PDU output module installed at its output end. Each of the two PDU output modules is respectively connected to several parallel cabinet contactors and a communication interface. The two PDU output modules are electrically connected to each other through the parallel cabinet contactors and the communication interface. The PDU output modules are also communicatively connected to the control terminal. Each charging pile main cabinet has a first power distribution circuit and a second power distribution circuit at its input end, capable of inputting power to the charging pile main cabinet. A first star topology power distribution module is installed between the first power distribution circuit and the output end of the charging pile main cabinet. A second star topology power distribution module is installed between the second power distribution circuit and the output end of the charging pile main cabinet. The output ends of the first star topology power distribution module and the second star topology power distribution module are connected by a ring topology network.

[0005] The electric vehicle charging pile provided by this utility model, as described above, has the following beneficial effects:

[0006] This utility model utilizes a PDU output module to connect to two charging pile main cabinets. Multiple parallel contactors and communication interfaces are used to connect the two PDU output modules, enabling parallel operation of the two charging pile main cabinets in a plug-and-play installation manner, thus expanding the capacity of the electric vehicle charging pile. Simultaneously, by employing a combination of star and ring topologies in each individual charging pile main cabinet for power distribution, it provides more power distribution paths for the charging pile, achieving fully flexible allocation. This makes power scheduling more flexible during power distribution, effectively improving power allocation efficiency and avoiding the "island effect" in the circuit. It solves the problems of high inter-module latency and uneven power distribution in traditional modular charging piles during capacity expansion, which reduces the overall operating efficiency of the expanded charging pile. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This paper shows a schematic diagram of a charging stack and cabinet for an electric vehicle charging pile according to an embodiment of this application; Figure 2 This paper shows a schematic diagram illustrating the working principle of an electric vehicle charging pile according to an embodiment of this application.

[0008] Figure 3 A schematic diagram of a PDU output module for an electric vehicle charging pile according to an embodiment of this application is shown.

[0009] Figure label:

[0010] 1. PDU output module; 2. Charge stack main cabinet; 3. Communication cable; 4. Communication interface; 5. First power distribution circuit; 6. Second power distribution circuit; 7. First star topology power distribution module; 8. Second star topology power distribution module; 9. First circuit breaker; 10. First DC contactor; 11. Second circuit breaker; 12. Second DC contactor; 13. Third DC contactor; 14. Power cable. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0012] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0013] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0014] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to limit the invention.

[0016] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention.

[0017] An electric vehicle charging stack, implementing, for example Figure 1 As shown: This includes two main charging stack cabinets 2 that can be connected in parallel for expanding the capacity of electric vehicle charging stacks, and a control terminal. The control terminal includes, but is not limited to, a microcontroller-based controller, such as... Figure 2As shown, each of the two main charging stack cabinets 2 is equipped with a PDU output module 1 at its output end. Both main charging stack cabinets 2 are 480kW charging stacks. PDU stands for Power Distribution Unit. The PDU output module 1 is used to schedule the power output distribution of the main charging stack cabinet 2. Each of the two PDU output modules 1 is equipped with three parallel contactors and one communication interface 4. The two PDU output modules 1 are electrically connected to each other through the parallel contactors and the communication interface 4. The PDU output module 1 is also connected to the control terminal for communication.

[0018] Each 480kW charging pile main cabinet 2 is equipped with a PDU output module 1. The output part of each charging pile main cabinet 2 is modularized, and three parallel contactors and one communication interface 4 are pre-installed in the PDU output module 1. This allows two charging pile main cabinets 2 to be paralleled to form a 960kW charging pile system simply by connecting the corresponding parallel contactors and the interface of the communication interface 4 on site. This enables the expansion of the electric vehicle charging pile. The plug-and-play expansion effectively reduces the time required for parallel expansion. At the same time, the modular PDU also reduces the overall size of the electric vehicle charging pile and improves the space utilization of the parallel cabinet.

[0019] like Figure 1 As shown, each charging stack main cabinet 2 is equipped with a first power distribution circuit 5 and a second power distribution circuit 6 at its input end, which can respectively input power to the charging stack main cabinet 2. The input power of the first power distribution circuit 5 and the second power distribution circuit 6 is 240kW. A first star topology power distribution module 7 is installed between the first power distribution circuit 5 and the output end of the charging stack main cabinet 2, and a second star topology power distribution module 8 is installed between the second power distribution circuit 6 and the output end of the charging stack main cabinet 2. The output ends of the first star topology power distribution module and the output ends of the second star topology power distribution module are connected by a ring topology network.

[0020] The design incorporates a 240kW first power distribution circuit 5 and a second power distribution circuit 6, enabling each charging stack main cabinet 2 to have dual independent power inputs. A star-connected power distribution module is used, and a ring topology network is adopted at the output end of the two star-topology power distribution modules. This makes the power output path more selective and greatly improves the flexibility of power distribution scheduling.

[0021] In some improved embodiments, such as Figure 1As shown, the first star topology power distribution module 7 includes a first circuit breaker 9 installed at the output end of the first power distribution circuit 5 and 15 first DC contactors 10 for power distribution. Each first DC contactor 10 is connected to the first circuit breaker 9 in a star topology network. The second star topology power distribution module 8 includes a second circuit breaker 11 installed at the output end of the second power distribution circuit 6 and 15 second DC contactors 12 for power distribution. Each second DC contactor 12 is connected to the second circuit breaker 11 in a star topology network. The rated current of the first DC contactor 10 and the second DC contactor 12 is 300A and the rated voltage does not exceed 1000V.

[0022] By equipping each power distribution module with 15 power distribution lines, the power distribution efficiency is improved by at least 300% compared to the traditional single-input power distribution method.

[0023] In some improved embodiments, such as Figure 1 As shown, a third DC contactor 13 is bridged between the output terminal of the first star topology power distribution module and the output terminal of the second star topology power distribution module. The rated current of the third DC contactor 13 is 300A and the rated voltage does not exceed 1000V.

[0024] A third DC contactor 13 is installed between the output terminals of the two star topology power distribution modules to provide reliable on / off protection for the power distribution safety between the two star topology power distribution modules. Even if one of the 240kW power distribution circuits fails, the other circuit can still have 240kW of power to support the operation of the electric vehicle charging pile, avoiding a complete shutdown of the charging pile. This increases the continuous availability of the electric vehicle charging pile system to 99%.

[0025] In some improved embodiments, such as Figure 2 As shown, the parallel contactors of the two PDU output modules 1 are connected and installed together by power wires 14, and the communication interfaces 4 of the two PDU output modules 1 are connected and installed together by communication wires 3.

[0026] The two PDU output modules 1 are connected by power wire 14 and communication wire 3, which greatly simplifies the expansion connection between the two charging piles and improves the efficiency of parallel cabinet installation by 40%.

[0027] The PDU output module 1 utilizes existing CAN bus communication technology and intelligent scheduling optimization algorithms to achieve dynamic power allocation. Through a master-slave control collaborative architecture, the system collects real-time load data from each charging terminal, such as current, voltage, battery SOC, and priority requirements. This, combined with algorithms, enables intelligent decision-making regarding global power resources—prioritizing the charging needs of high-priority devices, dynamically balancing the power distribution across multiple vehicles to avoid overload, and automatically adjusting the power output route based on device status and environmental changes (such as temperature or faults). Through the high real-time communication and closed-loop control of the CAN bus, millisecond-level response and precise scheduling of power resources are achieved, ensuring maximum charging efficiency under total power constraints while balancing safety and user charging experience. It also supports fault isolation, load balancing, and adaptive adjustment across multiple scenarios.

[0028] In the specific implementation of this utility model, when it is necessary to expand the capacity of the current 480kW charging pile, it is only necessary to plug in and connect the power wire 14 and communication wire 3 between the two PDU output modules 1. For the operation of a single 480kW charging pile main cabinet 2, the power is first input and distributed from the input terminals of the first power distribution circuit 5 and the second power distribution circuit 6, respectively, and then distributed from the first circuit breaker 9 to the lines where each first DC contactor 10 is located, and from the second circuit breaker 11 to the lines where each second DC contactor 12 is located. Finally, the power is output from each first DC contactor 10 and the second DC contactor 12 to each charging terminal, thereby using multiple charging terminals to charge multiple electric vehicles simultaneously. After the electric vehicle charging pile is expanded by parallel cabinet, it can realize the simultaneous power distribution work of four charging piles to electric vehicles, greatly improving the power supply efficiency.

[0029] Compared with existing technologies, this utility model utilizes a PDU output module 1 to connect to two charging pile main cabinets 2, and connects the two PDU output modules 1 through multiple parallel contactors and communication interfaces 4. It realizes the parallel operation of the two charging pile main cabinets 2 in a plug-and-play installation manner, achieving the purpose of expanding the capacity of electric vehicle charging piles. At the same time, by using a combination of star topology and ring topology networks in each individual charging pile main cabinet 2 for power distribution, it provides more power distribution paths for the power distribution of the charging pile, realizes fully flexible dispatching, and makes the power scheduling of the charging pile more flexible during power distribution, greatly improving the power distribution efficiency, avoiding the "island effect" phenomenon in the circuit, and solving the problem of high latency between modules and uneven power distribution in traditional modular charging piles when expanding capacity, which reduces the overall working efficiency of the charging pile after expansion.

[0030] Compared with the prior art, this utility model configures two input paths with the same input power for each charging stack main cabinet 2 and adopts dual independent input, which can avoid single point failure at the input end, thereby enabling the electric vehicle charging stack to work continuously.

[0031] Compared with existing technologies, this invention, by adopting a modular PDU, makes it more convenient and efficient to repair electric vehicle charging piles when they malfunction, thus reducing maintenance costs.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electric vehicle charging stack, characterized in that: The system includes two parallel-connectable main cabinets for expanding the capacity of electric vehicle charging piles and a control terminal. Each main cabinet is equipped with a PDU output module. Each PDU output module is connected to several parallel contactors and a communication interface. The two PDU output modules are electrically connected to each other through the parallel contactors and the communication interface. The PDU output modules are also connected to the control terminal. Each main cabinet has a first power distribution circuit and a second power distribution circuit at its input end, which can input power to the main cabinet. A first star topology power distribution module is installed between the first power distribution circuit and the output end of the main cabinet, and a second star topology power distribution module is installed between the second power distribution circuit and the output end of the main cabinet. The output ends of the first star topology power distribution module and the second star topology power distribution module are connected by a ring topology network.

2. The charging stack according to claim 1, characterized in that, The first star topology power distribution module includes a first circuit breaker installed at the output end of the first power distribution circuit and several first DC contactors for power distribution. Each first DC contactor is connected to the first circuit breaker via a star topology network.

3. The charging stack according to claim 2, characterized in that, The second star topology power distribution module includes a second circuit breaker installed at the output end of the second power distribution circuit and several second DC contactors for power distribution. Each second DC contactor is connected to the second circuit breaker via a star topology network.

4. The charging stack according to claim 3, characterized in that, A third DC contactor is connected as a bridge between the output terminal of the first star topology power distribution module and the output terminal of the second star topology power distribution module.

5. The charging stack according to claim 1, characterized in that, The two PDU output modules are connected to each other via power wires, and their communication interfaces are connected via communication wires.

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