Charging pile power system, expandable full-matrix flexible charging pile and power distribution method

Abstract

The invention discloses a charging pile power system, an expandable full-matrix flexible charging pile and a power distribution method. The charging pile power system comprises eight charging modules and thirty-two high-voltage direct-current contactors. The eight charging modules form a rectangular framework, each charging module is connected with the other seven charging modules through seven high-voltage direct-current contactors, and four charging modules on one side of the rectangular framework are all connected with one high-voltage direct-current contactor towards the outside of the rectangular framework. The four charging modules on the other side of the rectangular framework are provided with connecting ports towards the outside of the rectangular framework. The device is small in size, low in noise and small in occupied area, and can be placed in a charging station more flexibly.

Description

Technical Field

[0001] The present invention belongs to the field of charging piles, and relates to a charging pile power system, an expandable full-matrix flexible charging pile, and a power distribution method. Background Art

[0002] With the continuous development of the charging pile industry, the system power of charging piles (piles) has gradually moved from kilowatts to megawatts. However, there are many manufacturers in the industry who only increase the total power of the charging pile system and use this as a gimmick without optimizing the charging module distribution topology, resulting in the actual output power being far less than the system nominal power.

[0003] At present, high-power charging piles are composed of a charging host and a charging terminal, in which the charging host includes a charging module, a power distribution unit, and a control unit. It realizes the functions of AC grid-DC conversion, control, and providing the DC power required for charging to the charging terminal. The charging terminal realizes the interaction between the vehicle and the charging pile and charges the electric vehicle.

[0004] From the above, it can be seen that if the power of the charging stack system needs to be increased, the number of charging modules needs to be further increased, but this will bring about a series of problems such as increased size and noise of the charging host, heat dissipation of the charging module, complex module allocation topology, and increased costs. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a charging stack power system and an expandable full-matrix flexible charging stack and power distribution method, which are small in size, low in noise, and occupy a small area, and can be placed more flexibly in a charging station.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A charging stack power system includes eight charging modules and thirty-two high-voltage DC contactors; Eight charging modules form a rectangular structure. Each charging module uses seven high-voltage DC contactors to connect with the other seven charging modules respectively. The four charging modules on one side of the rectangular structure are connected to a high-voltage DC contactor outside the rectangular structure, and the four charging modules on the other side of the rectangular structure have connection ports reserved outside the rectangular structure.

[0007] An expandable full-matrix flexible charging stack, including a total control unit and multiple charging stack power systems; Each charging stack power system is connected to a plurality of charging terminals, which are connected to the charging terminals through their own charging modules, and the charging terminals and the charging stack power system are both connected to the general control unit; The four charging modules on one side of each charging stack power system are connected to the four charging modules on the opposite side of the adjacent charging stack power system in a one-to-one correspondence.

[0008] Preferably, the four charging modules on one side of the last charging stack power system are connected one-to-one with the four charging modules on the opposite side of the first charging stack power system.

[0009] Preferably, each charging stack power system is connected to eight charging terminals, and the eight charging terminals are respectively connected to eight charging modules of the charging stack power system in a one-to-one correspondence.

[0010] Preferably, each charging terminal is connected to at least one charging gun.

[0011] Preferably, the charging module of the charging stack power system is connected to the charging terminal via a DC power line, and the charging stack power systems are connected via DC power lines.

[0012] Preferably, the charging stack power system is connected to an AC input cable.

[0013] Preferably, the general control unit is connected to the operation platform cloud.

[0014] A scalable power allocation method for a full-matrix flexible charging pile. When a charging terminal in a charging pile power system starts charging, if all charging modules of the charging pile power system have participated in the charging of other charging terminals, at this time, the general control unit first allocates the charging module directly connected to the charging terminal to the charging terminal, supports the charging terminal to complete the vehicle-pile insulation detection, and smoothly enters the charging process. Subsequently, the general control unit receives the vehicle demand voltage and current information uploaded by the charging terminal, combines the demand voltage and current information of the charging vehicle and the current several charging pile power systems including all available charging modules, calculates the number of charging modules allocated to each charging terminal and the high-voltage DC contactor that needs to be closed to call the charging module, and allocates any idle charging module to the charging terminal.

[0015] Preferably, when multiple charging terminals are charging vehicles and the sum of the power requirements of all charged vehicles is greater than the rated output power of the entire charging stack, the general control unit will adjust the number of charging modules allocated to the charging terminal based on the current vehicle power requirements uploaded by all charging terminals and the percentage of the rated output power of the charging stack, combined with the rated output power of each charging module, so that each charging module outputs at full power.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention consists of 8 charging modules and 32 pairs of high-voltage DC contactors to form a charging stack power system. It is a full matrix topology, which can ensure that each charging gun can be assigned to any charging module to ensure that the charging modules are fully called. Idle connection terminals are set at four charging modules, and idle high-voltage DC contactors are set at the other four charging modules. It is convenient for multiple charging stack power systems to be flexibly connected in parallel, and the system power is doubled, which improves the compatibility of charging piles with charging stations and facilitates low-cost and short-cycle expansion of charging stations. Compared with the charging stack host in the current market, the charging stack power system is small in size, low in noise, and occupies a small area, and can be placed more flexibly in the charging station.

[0017] Furthermore, a scalable full-matrix flexible charging stack is formed by multiple charging stack power systems and managed by the general control unit. Each charging gun can call any charging module in the entire charging stack when charging. The general control unit is responsible for reporting all terminal status information, charging information, etc. of the charging stack to the platform, and is responsible for sending platform authentication information, remote setting information, etc. to the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the scalable full-matrix flexible charging stack topology of the present invention; Figure 2 It is a schematic diagram of the topological splitting of the scalable full-matrix flexible charging stack of the present invention; Figure 3 This is a diagram of multiple expandable full-matrix flexible charging stack architectures of the present invention. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" used in this article includes any and all combinations of one or more related listed items. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0024] like Figure 1 and Figure 2 As shown, the charging stack power system of the present invention includes eight charging modules and thirty-two high-voltage DC contactors.

[0025] Eight charging modules form a rectangular structure. Each charging module uses seven high-voltage DC contactors to connect with the other seven charging modules, for a total of twenty-eight high-voltage DC contactors. The four charging modules on one side of the rectangular structure are each connected to a high-voltage DC contactor outside the rectangular structure. Together with the twenty-eight high-voltage DC contactors inside the rectangular structure, there are a total of thirty-two high-voltage DC contactors. The four charging modules on the other side of the rectangular structure have connection ports reserved to the outside of the rectangular structure.

[0026] Figure 1 and Figure 2 Among them, M1-M8 are charging modules, K1-K32 are high-voltage DC contactors. The figure shows an example of a high-voltage DC contactor for the positive output of the charging module. Its negative output also has 32 high-voltage DC contactors corresponding one to one with the positive contactors.

[0027] Among them, the four charging modules M1, M4, M5, and M8 located on one side of the rectangular structure are not only connected to other charging modules, but also have additional connection ports reserved.

[0028] Among them, the four charging modules M2, M3, M6, and M7 located on the other side of the rectangular structure are connected to other charging modules and are also connected to one main contact of the high-voltage DC contactors K29, K30, K31, and K32 respectively. The other main contact of the high-voltage DC contactors K29, K30, K31, and K32 is connected with a reserved interface.

[0029] Figure 1 In order to show the structure more clearly and not be blocked, contactors K23-K28 are hidden.

[0030] The above-mentioned charging stack power system can form an expandable full-matrix flexible charging stack. The smallest charging stack structure is composed of a main control unit, a charging terminal and a charging stack power system. The charging stack power system is connected to the AC input cable, and the charging module is powered by the AC input cable. The charging module of the charging stack power system is connected to the charging terminal through a DC power line. Each charging terminal is connected to at least one charging gun. The charging terminal and the charging module and high-voltage DC contactor of the charging stack power system are connected to the main control unit through communication cables. The main control unit is connected to the operation platform cloud. In this embodiment, each charging stack power system is connected to eight charging terminals, and the eight charging terminals are respectively connected to the eight charging modules of the charging stack power system one by one.

[0031] When the charging station needs to expand the number of charging terminals, it is only necessary to add a charging stack power system B or more charging stack power systems and corresponding charging terminals, and the newly added charging stack power system B is connected to the existing charging stack power system A in accordance with the one-to-one correspondence between the four charging modules on one side of the charging stack power system B and the charging modules on the opposite side of the charging stack power system A, that is, MA1 is connected to MB2, MA4 is connected to MB3, MA5 is connected to MB6, and MA8 is connected to MB7 (where MA1 represents the M1 charging module in the charging stack power system A, MB2 represents the M2 charging module in the charging stack power system B, and the others are analogous and will not be repeated here).

[0032] If another charging stack power system C is added, continue to follow the above rules, MB1 connects MC2... and so on.

[0033] The last charging stack power system (assuming it is E) in the entire charging stack is connected to the first charging stack power system A in the same way as above, ME1 is connected to MA2, ME4 is connected to MA3, and so on. The entire charging stack power system is formed into a ring network by a single independent individual, which can increase the call path and reduce the number of high-voltage DC contactor closures.

[0034] The charging stack power systems are connected by DC power lines. After connection, the modules in each charging stack power system can be called by any charging terminal, thereby improving the system power utilization of the entire charging stack.

[0035] In the scalable full-matrix flexible charging stack, the AC input cable provides 380Vac AC power to the charging module in the charging stack power system. The charging module performs AC / DC conversion and transmits the power to the charging terminal through a DC power cable.

[0036] The charging terminal is responsible for the interaction between the vehicle and the charging pile. After the driver plugs in the charging pile, he uses the APP, scans the code, and other operations to initiate a charging request. The charging terminal sends this information to the main control unit, which uploads it to the operation platform cloud for information authentication. After the authentication result is sent back, it will be sent down by the main control unit to the charging terminal, and charging will be successfully started.

[0037] After charging is successfully started, the charging terminal obtains the vehicle's required voltage and current information and uploads it to the main control unit in real time. The main control unit intelligently calculates the required number of charging modules and the optimal allocation path based on the information, and sends the information to the contactor control unit and charging module control unit in the charging stack power system.

[0038] The charging module control unit sends a power-on instruction to the corresponding charging module according to the information sent by the main control unit, and outputs voltage and current instructions.

[0039] The contactor control unit closes or opens the corresponding high-voltage DC contactor according to the information sent by the main control unit.

[0040] At this point, the charging link is officially established. During the entire charging process, the charging terminal sends charging status information, charging vehicle and charging terminal information to the main control unit in real time, and the main control unit uploads the information to the operation platform cloud in real time.

[0041] For example, when charging terminal 4 in charging pile power system A starts charging, if all charging modules in charging pile power system A have participated in the charging of other charging terminals, at this time, the general control unit first assigns charging module MA4 directly connected to charging terminal 4 to charging terminal 4, supports charging terminal 4 to complete vehicle pile insulation detection, and smoothly enters charging. Then the general control unit receives the vehicle demand voltage and current information uploaded by charging terminal 4, combines the demand voltage and current information of the charging vehicle and the current several charging pile power systems containing all available charging modules, and intelligently calculates the number of charging modules assigned to each charging terminal and the high-voltage DC contactor that needs to be closed to call the charging module. Charging terminal 4 can be assigned to any idle charging module in any charging pile power system.

[0042] For example, when multiple charging terminals are charging vehicles, and the sum of the power requirements of all charging vehicles is greater than the rated output power of the entire charging stack, the total control unit will intelligently adjust the number of charging modules allocated to the charging terminal based on the current vehicle power requirements uploaded by all charging terminals and the percentage of the rated output power of the charging stack, combined with the rated output power of the charging module, to ensure that each charging module is outputting at full power, avoid waste of excess power in the charging module, and improve the overall utilization efficiency of the charging stack.

[0043] In addition, the main control unit can expand the load constraint function of the charging station to realize dynamic adjustment of the load of the entire charging station; the AC / DC unidirectional charging module in the charging stack power system can be replaced with an AC / DC bidirectional module, and the charging stack can expand V2G, V2V and other functions.

[0044] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0045] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0046] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0047] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0048] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

[0049] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A charging stack power system, characterized in that: It includes eight charging modules and thirty-two high-voltage DC contactors; Eight charging modules form a rectangular structure. Each charging module uses seven high-voltage DC contactors to connect with the other seven charging modules respectively. The four charging modules on one side of the rectangular structure are connected to a high-voltage DC contactor outside the rectangular structure, and the four charging modules on the other side of the rectangular structure have connection ports reserved outside the rectangular structure.

2. A scalable full-matrix flexible charging stack, characterized in that: A charging stack power system comprising a general control unit and a plurality of charging stack power systems according to claim 1; Each charging stack power system is connected to a plurality of charging terminals, which are connected to the charging terminals through their own charging modules, and the charging terminals and the charging stack power system are both connected to the general control unit; The four charging modules on one side of each charging stack power system are connected to the four charging modules on the opposite side of the adjacent charging stack power system in a one-to-one correspondence.

3. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: The four charging modules on one side of the last charging stack power system are connected one-to-one with the four charging modules on the opposite side of the first charging stack power system.

4. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: Each charging stack power system is connected to eight charging terminals, and the eight charging terminals are respectively connected to eight charging modules of the charging stack power system in a one-to-one correspondence.

5. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: Each charging terminal is connected to at least one charging gun.

6. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: The charging module of the charging stack power system is connected to the charging terminal through a DC power line, and the charging stack power systems are connected through DC power lines.

7. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: The charging stack power system is connected to the AC input cable.

8. The expandable full-matrix flexible charging stack according to claim 2, characterized in that: The main control unit is connected to the operation platform cloud.

9. A power distribution method based on the scalable full-matrix flexible charging stack according to any one of claims 2 to 8, characterized in that: When a charging terminal in a charging stack power system starts charging, if all the charging modules of the charging stack power system have participated in the charging of other charging terminals, the general control unit first allocates the charging module directly connected to the charging terminal to the charging terminal, supports the charging terminal to complete the vehicle-pile insulation detection, and smoothly enters the charging process. Then the general control unit receives the vehicle demand voltage and current information uploaded by the charging terminal, combines the demand voltage and current information of the charging vehicle and the current several charging stack power systems containing all the available charging modules, calculates the number of charging modules allocated to each charging terminal and the high-voltage DC contactor that needs to be closed to call the charging module, and allocates any idle charging module to the charging terminal.

10. The power distribution method according to claim 9, characterized in that: When multiple charging terminals are charging vehicles and the sum of the power requirements of all charged vehicles is greater than the rated output power of the entire charging stack, the general control unit will adjust the number of charging modules allocated to the charging terminal based on the current vehicle power requirements uploaded by all charging terminals and the percentage of the rated output power of the charging stack, combined with the rated output power of each charging module, so that each charging module can output at full power.

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