Charging system

Abstract

The utility model discloses a charging system, which comprises a transformer, a plurality of first power conversion devices, at least one charging end and a control device, and is characterized in that the transformer comprises a primary winding and a plurality of first secondary windings, the primary winding is connected with a power supply interface, and the first secondary windings are connected with the power supply interface; each first secondary winding is connected with the input end of the corresponding first power conversion device; the output ends of the plurality of first power conversion devices are connected with at least one charging end; the control device is respectively connected with the plurality of first power conversion devices and the at least one charging end, and is configured to control the plurality of first power conversion devices and the at least one charging end so as to charge the load. According to the charging system, the application of a low-voltage switch cabinet is omitted, connecting cables are saved, the application cost is reduced, and the system integration degree is improved.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a charging system. Background Art

[0002] Faced with the international shipping industry's continuous improvement of ship environmental protection and emission reduction standards, electric ships are currently one of the most promising technical directions because they can significantly reduce ship pollutant gas emissions. New energy ships represented by pure battery-powered ships have become one of the most promising technical directions.

[0003] In order to meet the cruising range and electric propulsion requirements of electric ships, the capacity of power batteries configured for electric ships is getting larger and larger. In order to solve the problem of high-power charging of electric ships, relevant technologies have proposed a charging system for ultra-large capacity batteries for electric ships. However, the charging system has a low degree of integration, which increases the application cost. Utility Model Content

[0004] In view of the above problems, the present application provides a charging system, in which the first secondary winding is directly connected to the first power conversion device, eliminating the use of a low-voltage switch cabinet, saving connecting cables, reducing application costs, and improving system integration.

[0005] The present application provides a charging system, comprising: a transformer, a plurality of first power conversion devices, at least one charging end and a control device, wherein the transformer comprises a primary winding and a plurality of first secondary windings, the primary winding is connected to a power supply interface, and each of the first secondary windings is connected to an input end of a corresponding first power conversion device; the output ends of the plurality of first power conversion devices are connected to at least one charging end; the control device is respectively connected to the plurality of first power conversion devices and at least one charging end, and is configured to control the plurality of first power conversion devices and at least one charging end to charge a load.

[0006] In the technical solution of the embodiment of the present application, the power supply interface is connected to the primary winding of the transformer, and the multiple first secondary windings of the transformer are connected to the charging end through the corresponding multiple first power conversion devices. During the charging process, the high voltage provided by the power supply interface is transmitted to the primary winding of the transformer, and the multiple first secondary windings of the transformer are stepped down and output, and the stepped-down output electrical signal is converted into direct current through the corresponding first power conversion device, and the converted output direct current supplies power to the load through the charging end. Therefore, in the present application, the first secondary winding is directly connected to the first power conversion device, that is, the multiple first power conversion devices are directly connected to the low-voltage side of the transformer, which saves the application of low-voltage switch cabinets, saves connecting cables, reduces application costs, and improves system integration.

[0007] In some embodiments, each of the first secondary windings is connected to an input end of a corresponding first power conversion device, that is, the first secondary windings are connected to the first power conversion devices in a one-to-one correspondence.

[0008] In some embodiments, the charging system further includes: a high-voltage power distribution device, which is arranged between the power supply interface and the primary winding, that is, the high-voltage power provided by the power supply interface is output to the transformer through the high-voltage power distribution device.

[0009] In some embodiments, the high-voltage power distribution device includes at least one of a high-voltage incoming line module, a high-voltage metering module and a high-voltage outgoing line module; wherein, when the high-voltage power distribution device includes the high-voltage incoming line module, the high-voltage metering module and the high-voltage outgoing line module, the input end of the high-voltage incoming line module is connected to the power supply interface, the output end of the high-voltage outgoing line module is connected to the primary winding, the high-voltage metering module is arranged between the output end of the high-voltage incoming line module and the input end of the high-voltage outgoing line module, and the high-voltage outgoing line module includes a fuse.

[0010] By equipping the high-voltage power distribution device with a high-voltage outlet module including a fuse, reliable protection is provided for the transformer, thereby improving the reliability of the charging system.

[0011] In some embodiments, the charging system also includes: a power distribution device, which is arranged between multiple first power conversion devices and at least one charging end, and the power distribution device is connected to the control device and is configured to distribute the electrical energy of multiple first power conversion devices to at least one charging end under the control of the control device.

[0012] This embodiment realizes the distribution of charging power through a power distribution device. For example, one charging end can obtain the electric energy of one first power conversion device, or one charging end can obtain the electric energy of all first power conversion devices to meet the charging demand.

[0013] In some embodiments, the power distribution device includes at least one first switch group, each of the first switch groups is connected to the corresponding first power conversion device and the charging end, each of the charging ends includes multiple charging interfaces, and each of the first switch groups is configured to distribute the electrical energy of the connected first power conversion device to the multiple charging interfaces of the connected charging end under the control of the control device.

[0014] The charging interface of the charging end is connected to the first power conversion device through the first switch group. The output power of the charging interface of the charging end can be the electric energy of one first power conversion device or the electric energy of multiple first power conversion devices.

[0015] In some embodiments, the charging end includes multiple charging ends, each of which includes a charging interface, and the power distribution device includes a second switch group, which is configured to distribute the electrical energy of multiple first power conversion devices to the charging interfaces of multiple charging ends under the control of the control device.

[0016] Each charging end is provided with a charging interface. By controlling the second switch group, one charging end can be connected to a first power conversion device, that is, the electric energy of a first power conversion device can be obtained through the charging interface of the charging end. One charging end can also be connected to multiple first power conversion devices, that is, the electric energy of multiple first power conversion devices can be obtained through the charging interface of the charging end.

[0017] In this embodiment, one charging terminal corresponds to one charging interface, and the electric energy distribution control of the first power conversion device is realized by controlling the second switch group.

[0018] In some embodiments, the first power conversion device includes an IGBT (Insulate-Gate Bipolar Transistor) power conversion module. Using the IGBT power conversion module as the first power conversion device can increase the charging efficiency and reduce the failure rate.

[0019] In some embodiments, the first power conversion device includes a filter module, and the filter module is arranged at the input end of the first power conversion device and / or the output end of the first power conversion device. The first power conversion device integrates a filtering function, so that the charging system can meet the power quality requirements without adding an additional filter.

[0020] In some embodiments, the transformer further includes a second secondary winding, and the charging system further includes: a power supply device, wherein the power supply device is connected to the second secondary winding and is configured to supply power to the charging system.

[0021] In some embodiments, the charging system further includes a monitoring module, which is suitable for communicating with a user terminal and is configured to obtain status information of the charging system and send the status information to the user terminal.

[0022] In some embodiments, the transformer also includes a third secondary winding, and the charging system also includes: a second power conversion device and / or a third power conversion device, the second power conversion device is respectively connected to the energy storage interface and the third secondary winding, and the third power conversion device is respectively connected to the new energy interface and the third secondary winding; wherein, when the charging system includes the second power conversion device and the third power conversion device, the control device is also respectively connected to the second power conversion device and the third power conversion device, and is configured to control multiple first power conversion devices, the second power conversion devices and the third power conversion devices to transfer electrical energy between the power supply interface, at least one of the charging ends, the energy storage interface and the new energy interface.

[0023] This embodiment is developed based on a common AC bus architecture and has the ability to seamlessly integrate wind, solar, storage, inspection, and charging. It can achieve two-way interaction with the power grid and can also be expanded into a solar storage and charging integrated device, expanding a wider range of energy sources and broader application paths.

[0024] In some embodiments, the charging system further includes: a second power conversion device and / or a third power conversion device, a DC bus and a plurality of fourth power conversion devices, wherein the second power conversion device is respectively connected to the energy storage interface and the DC bus, the third power conversion device is respectively connected to the new energy interface and the DC bus, a plurality of the fourth power conversion devices are respectively connected to at least one of the charging terminals and the DC bus, and the DC bus is also connected to a plurality of the first power conversion devices; wherein, in the case where the charging system includes the second power conversion device and the third power conversion device, the control device is also respectively connected to the second power conversion device, the third power conversion device and a plurality of the fourth power conversion devices, and is configured to control a plurality of the first power conversion devices, the second power conversion device, the third power conversion device and a plurality of the fourth power conversion devices to transfer electrical energy between the power supply interface, at least one of the charging terminals, the energy storage interface and the new energy interface.

[0025] The charging system of this embodiment is developed based on a common DC bus architecture, which can achieve two-way interaction with the power grid and can also be expanded into an integrated photovoltaic storage and charging device to expand a wider range of energy sources and broader application paths.

[0026] In some embodiments, the first power conversion device includes a heat dissipation duct configured to dissipate heat for the first power conversion device, so as to realize an independent duct heat dissipation design for the first power conversion device, reduce the duct circulation path, and reduce the working noise.

[0027] In some embodiments, the charging system further includes: one or more of a dehumidification device, a heating device, a fire-fighting device, and a protection device.

[0028] In some embodiments, the charging system further includes: a box, in which the transformer, the plurality of the first power conversion devices and the control device are arranged to improve system integration.

[0029] In some embodiments, the charging system further includes a high-voltage power distribution device, and the high-voltage power distribution device is disposed in the box.

[0030] In some embodiments, the box is divided into a high-voltage chamber, a transformer chamber and a charging chamber, the high-voltage distribution device is arranged in the high-voltage chamber, the transformer is arranged in the transformer chamber, and a plurality of the first power conversion devices are arranged in the charging chamber.

[0031] In some embodiments, the box body is further separated into a low-pressure chamber, and the control device is arranged in the low-pressure chamber.

[0032] In some embodiments, each of the high voltage room, the low voltage room, the transformer room and the charging room includes at least one door, and the doors of the transformer room and the charging room are fireproof doors to improve the protection effect.

[0033] In some embodiments, the door of the transformer room is provided with a cooling fan and vents, and the doors of the low-voltage room and the charging room are provided with vents, so as to realize air circulation in the transformer room and achieve a heat dissipation effect.

[0034] In some embodiments, the transformer chamber includes a frame, a first chamber door, a second chamber door and a safety door. The first chamber door, the second chamber door and the safety door are arranged on the frame. The first chamber door is provided with a locking member, and the locking member is located inside the transformer chamber. The locking member selectively abuts against the frame to limit the position. The safety door is arranged corresponding to the second chamber door and is located inside the transformer chamber.

[0035] In some embodiments, the box body includes an outer shell and an inner wall, and a fireproof layer is provided between the outer shell and the inner wall, and a protective layer is provided on the surface of the outer shell. For example, materials such as fireproof rock wool or partitions are filled between the outer shell and the inner wall to form a fireproof layer through materials such as fireproof rock wool or partitions, and polyurethane coating is coated on the outer shell, so that the surface of the outer shell has a protective layer to improve the fireproof and corrosion-resistant properties of the box body.

[0036] In some embodiments, a water guiding slope is formed on the top of the shell, and a water retaining portion is also formed on the shell. The water retaining portion is located below the water guiding slope and connected to the water guiding slope to prevent external rainwater from entering the interior of the box.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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 application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0039] Figure 1 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 1 ;

[0040] Figure 2 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 2 ;

[0041] Figure 3 Schematic diagram of the connection of the first power conversion device in some embodiments of the present application Figure 1 ;

[0042] Figure 4 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 3 ;

[0043] Figure 5 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 4 ;

[0044] Figure 6 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 5 ;

[0045] Figure 7 A connection diagram of a first switch group in some embodiments of the present application;

[0046] Figure 8 A connection diagram of a second switch group in some embodiments of the present application;

[0047] Fig. 9 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 6 ;

[0048] Fig.10 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 7 ;

[0049] Fig.11Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 8 ;

[0050] Fig.12 Schematic diagram of the connection of the first power conversion device in some embodiments of the present application Figure 2 ;

[0051] Fig.13 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 9 ;

[0052] Fig.14 Schematic diagram of the connection of the charging system of some embodiments of the present application Figure 10 ;

[0053] Fig.15 This is a schematic diagram of the structure of the box body of some embodiments of the present application.

[0054] Reference numerals:

[0055] Box 10, high-voltage chamber 11, low-voltage chamber 12, transformer chamber 13, charging chamber 14, high-voltage power distribution device 20, high-voltage incoming line module 21, high-voltage metering module 22, high-voltage outgoing line module 23, fuse 231, transformer 30, primary winding 31, first secondary winding 32, second secondary winding 33, third secondary winding 34, first power conversion device 40, IGBT power conversion module 41, filter module 42, heat dissipation duct 43, control device 50, charging end 60, charging interface 61, power distribution device 70, first switch group 71, second switch group 72, power supply device 80, monitoring module 90, second power conversion device 110, energy storage interface 111, third power conversion device 120, new energy interface 121, DC bus 130, fourth power conversion device 140, load 200, user terminal 300, energy storage device 400, new energy device 500. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0057] 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 this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0059] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] As the international shipping industry continues to improve the environmental protection and emission reduction standards for ships, new energy ships represented by pure battery-powered ships have become one of the most promising technical directions. Electric ships are able to significantly reduce ship pollutant gas emissions, and the market recognition of electric ships is also increasing. In the face of the development of electric ships, in order to meet the requirements of electric ship cruising range and electric propulsion, the capacity of power batteries configured for electric ships is getting larger and larger, so it is urgent to solve the problem of high-power charging of electric ships.

[0065] In order to solve the problem of high-power charging of electric ships, a charging system for ultra-large capacity batteries of electric ships is proposed in the relevant technology. The charging system includes a container, a high-voltage incoming line cabinet, a high-voltage metering cabinet, two low-voltage switch cabinets, two bidirectional energy storage converters, a three-winding transformer detachably arranged in the container, and two DC (Direct Current) control cabinets. However, this technical solution still has the following shortcomings:

[0066] (1) The high voltage part goes directly from the metering cabinet to the transformer, which poses a greater safety risk to the transformer;

[0067] (2) The charging system is not highly integrated. Two low-voltage cabinets and two DC control cabinets are added to the low-voltage part, resulting in a decrease in the charging efficiency of the whole machine.

[0068] (3) The charging module uses a bidirectional energy storage inverter as a charger. When the energy storage inverter is used as a charger, an LCL filter needs to be added on the AC side, which has disadvantages in system integration and ventilation and heat dissipation.

[0069] In order to solve the above technical problems, the present application proposes a charging system, in which the power supply interface is connected to the primary winding of the transformer, and the multiple first secondary windings of the transformer are connected to the charging end through the corresponding multiple first power conversion devices. During the charging process, the high voltage electricity provided by the power supply interface is transmitted to the primary winding of the transformer, and the multiple first secondary windings of the transformer are stepped down and output, and the stepped-down output electrical signal is converted into direct current through the corresponding first power conversion device to supply power to the load through the charging end. Therefore, in the present application, the first secondary winding is directly connected to the first power conversion device, and the first power conversion device is directly connected through the first secondary winding of the transformer, which saves the application of low-voltage switch cabinets, saves connecting cables, reduces application costs, and improves system integration.

[0070] For the convenience of explanation, the following embodiments are combined Figure 1 The charging system of the present application is described.

[0071] like Figure 1 As shown, the charging system in the present application may include: a transformer 30 , a plurality of first power conversion devices 40 , at least one charging terminal 60 and a control device 50 .

[0072] The transformer 30 includes a primary winding 31 and a plurality of first secondary windings 32, the primary winding 31 is connected to the power supply interface, and each first secondary winding 32 is correspondingly connected to the input end of the corresponding first power conversion device 40. The output ends of the plurality of first power conversion devices 40 are connected to at least one charging end 60. The control device 50 is respectively connected to the plurality of first power conversion devices 40 and the at least one charging end 60, and is configured to control the plurality of first power conversion devices 40 and the at least one charging end 60 to charge the load 200.

[0073] Specifically, the power supply interface is used to receive a high-voltage electrical signal provided by an external power source. The transformer 30 is a device that uses the principle of electromagnetic induction to change the voltage of alternating current, and its main components are a primary winding, a secondary winding, and an iron core. In the application process, the transformer 30 can use a multi-winding dry-type transformer, and determine the number of first secondary windings 32 according to the number of first power conversion devices 40, determine the transformation ratio of the transformer 30 according to the input voltage of the first power conversion device 40, and then set the primary winding 31 and multiple first secondary windings 32 of the transformer 30. For example, Figure 2 As shown, the transformer 30 is composed of a 10kV high-voltage primary coil, i.e., a primary winding 30, and five low-voltage secondary coils, i.e., a first secondary winding 32. The 10kV high-voltage primary coil is connected to the power supply interface, and the five low-voltage secondary coils are respectively connected to five first power conversion devices 40. It can be understood that one first secondary winding 32 can be connected to the input end of one first power conversion device 40, or can be connected to the input ends of multiple first power conversion devices 40, which is not limited here.

[0074] The first power conversion device 40 is used to realize the conversion between AC and DC. In addition, the first power conversion device 40 may also have a voltage regulation function, for example, a boost circuit, a buck circuit, a power factor correction circuit, etc. are provided to realize different charging modes such as constant current charging, constant voltage charging, and constant power charging of the battery. The input end of the first power conversion device 40 is connected to the first secondary winding 32 to receive and convert the electrical signal output by the first secondary winding 32, and charge the corresponding load 2 with the converted target electrical signal through the charging end 60. The charging end 60 is used to provide an adapter interface for charging connection with the load 200, for example, a charging pile. It can be understood that the output end of a first power conversion device 40 is connected to one charging end 60, or it can be connected to multiple charging ends 60, which is not limited here.

[0075] In this embodiment, electrical isolation between the plurality of first power conversion devices 40 is achieved by isolation between the plurality of first secondary windings 32 of the transformer 30 .

[0076] Specifically, during the charging process, the primary winding 31 of the transformer 30 receives the high-voltage AC power input from the power supply interface, and the high-voltage AC power is stepped down and output through the multiple first secondary windings 32 of the transformer 30, and converted into DC power through the corresponding first power conversion device 40, and the converted DC power is used to supply power to the load 200 through the charging terminal 60. When the charging system is applied to high-power charging of electric ships, the load 200 is a ship battery.

[0077] The charging system of this embodiment directly connects the first power conversion device 40 to the low-voltage side of the transformer 30, eliminating the need for a low-voltage switch cabinet, making the overall architecture simple, saving connection cables, and reducing application costs.

[0078] In one embodiment of the present application, each first secondary winding 32 is connected to an input end of a corresponding first power conversion device 40 .

[0079] That is to say, the number of the first secondary winding 32 is equal to the number of the first power conversion device 40. Figure 2 As shown, the first secondary winding 32 is connected to the first power conversion device 40 in a one-to-one correspondence.

[0080] Furthermore, the first power conversion device 40 may adopt a MOSFET power conversion module or a Figure 3 The IGBT power conversion module 41 shown can be applied according to actual conditions.

[0081] The use of the IGBT power conversion module 41 in the first power conversion device 40 will make the first power conversion device 40 more stable, with a lower annual failure rate, and extend the life of the first power conversion device 40. In addition, the control and drive of the IGBT power conversion module 41 can share the circuit to further reduce the number of components. In addition, the charging system converts AC power into DC power through the IGBT power conversion module 41, and the output voltage range is 500V-1000V, and the output can be adjusted according to the battery specifications corresponding to the load 200.

[0082] In one embodiment of the present application, the first power conversion device 40 includes a filter module 42 , and the filter module 42 is disposed at an input end of the first power conversion device 40 and / or an output end of the first power conversion device 40 .

[0083] That is to say, the first power conversion device 40 integrates the filtering function, so that the charging system saves the use of the filter cabinet. In the application process, the first power conversion device 40 can first filter the AC power output by the first secondary winding 32 through the filtering device 42, and then perform power conversion through the IGBT power conversion module 41, or first perform power conversion on the AC power through the IGBT power conversion module 41, and then perform filtering through the filtering device 42, which is not limited here. Among them, the filtering device 42 can use an LCL filter or the like.

[0084] In this embodiment, the first power conversion device 40 is integrated with a filtering function, and the low-voltage side of the transformer 30 is directly connected to the first power conversion device 40, so that a single charging system saves more than 100,000 yuan in investment in distribution equipment and connecting cables compared to traditional technical solutions, and the floor space of the entire equipment is saved by more than 20%, which is particularly suitable for scenarios with tight port space.

[0085] Reference Figure 4 As shown, in one embodiment of the present application, the charging system further includes: a high-voltage power distribution device 20 , which is arranged between the power supply interface and the primary winding 31 .

[0086] The high-voltage power distribution device 20 is used to connect the power supply interface to receive the high-voltage electrical signal connected to the power supply interface, and transmit the high-voltage electrical signal to the transformer 30. During the charging process, the high-voltage power distribution device 20 receives the high-voltage AC power through the power supply interface, and transmits the received high-voltage AC power to the primary winding 31 of the transformer 30. The high-voltage AC power is stepped down and output through the multiple first secondary windings 32 of the transformer 30, and is converted into DC power through the corresponding first power conversion device 40. The converted DC power is used to power the load 200 through the charging terminal 60.

[0087] Combination Figure 5 As shown, in one embodiment of the present application, the high-voltage power distribution device 20 includes at least one of a high-voltage incoming line module 21, a high-voltage metering module 22 and a high-voltage outgoing line module 23; wherein, when the high-voltage power distribution device 20 includes a high-voltage incoming line module 21, a high-voltage metering module 22 and a high-voltage outgoing line module 23, the input end of the high-voltage incoming line module 21 is connected to the power supply interface, the output end of the high-voltage outgoing line module 23 is connected to the primary winding 31, the high-voltage metering module 22 is arranged between the output end of the high-voltage incoming line module 21 and the input end of the high-voltage outgoing line module 23, and the high-voltage outgoing line module 23 includes a fuse 231.

[0088] Among them, the high-voltage incoming line module 21 is used to introduce high voltage electricity from the power supply interface, such as a switch cabinet that introduces 10kV high-voltage AC electricity from the power supply grid. The high-voltage metering module 22 is usually composed of a metering part and a control part. The metering part is mainly used for electric energy metering and monitoring, while the control part is used to control and protect electric energy. The high-voltage metering module 22 is electrically connected to the high-voltage incoming line module 21, and the high-voltage power distribution part adopts a high-supply and high-metering solution.

[0089] The high-voltage outlet module 22 is used to output high voltage electricity and is electrically connected to the high-voltage side of the transformer 30, that is, the primary winding 31. A load switch fuse combination electrical cabinet can be selected. The fuse 231 in the high-voltage outlet module 22 can be connected in series to the output end or input end of the high-voltage outlet module 22. For example, one end of the fuse 231 is connected to the output end of the high-voltage outlet module 22, and the other end is connected to the primary winding 23. Among them, the fuse 231 is used to disconnect the circuit based on the melting of the fuse when the current in the circuit exceeds a predetermined value, so as to achieve short circuit and overcurrent protection.

[0090] Therefore, this embodiment adds a fuse combination cabinet to the high-voltage power distribution device 20 to provide reliable protection for the transformer 30 and further improve the reliability of the charging system.

[0091] See also Figure 6 As shown, in one embodiment of the present application, the charging system also includes: a power distribution device 70, which is arranged between the multiple first power conversion devices 40 and at least one charging terminal 60, and the power distribution device 70 is connected to the control device 50, and is configured to distribute the electrical energy of the multiple first power conversion devices 40 to at least one charging terminal 60 under the control of the control device 50.

[0092] When the charging system is applied to ship charging, the power distribution device 70 can be developed in coordination with the three-level BMS (Battery Management System) of the ship battery to monitor, protect, control and adjust the power of the entire charging system, and can implement a better charging control strategy. According to the charging power requirements of each charging terminal 60, a dynamic power distribution function is realized. The power distribution follows the basic principle of the optimal power flow path to improve the charging efficiency. At the same time, power can be distributed according to the charging requirements, which is suitable for meeting the charging requirements of large-capacity ship power batteries.

[0093] Specifically, during the charging process, the control device 50 can dynamically adjust the number of first power conversion devices 40 connected to each charging terminal 60 according to the user's charging request, battery charging demand, the current load state of the first power conversion device 40, the control instructions of the upper monitoring management system, and other parameters according to the predetermined control strategy. Specifically, when the power resources of the charging system are sufficient, the charging terminal 60 outputs at the maximum power demand. When the power resources of the charging system are occupied and the remaining resources are insufficient, the charging terminal 60 outputs according to the power resources that the charging system can provide, so that the power distribution follows the basic principle of the optimal power flow path. For example, when it is determined that the power resources of the charging system are sufficient, the control device 50 controls the power distribution device 70 to distribute the electric energy of four first power conversion devices 40 to the corresponding charging terminal 60. When it is determined that the power resources of the charging system are insufficient, the control device 50 controls the power distribution device 70 to distribute the electric energy of one first power conversion device 40 to the charging terminal 60. Whether the power resources of the charging system are sufficient can be judged based on parameters such as the charging power demand and the number of first power conversion devices 40. During the charging process, the control device 50 dynamically adjusts the charging parameters according to the data provided by the battery management system, executes corresponding actions, and completes the charging process.

[0094] To further illustrate, the charging system adopts 10kV high voltage access, and the 10kV high voltage is stepped down to 400V three-phase low voltage AC power through the transformer 30, and the 400V three-phase low voltage AC power is output to the corresponding first power conversion device 40 respectively, and the 400V three-phase low voltage AC power is rectified into 200-1000V DC power through the first power conversion device 40. The control device 50 controls the power distribution device 70 according to the power demand of the charging terminal 60 to distribute the output power of the first power conversion device 40 to each charging terminal 60, so that each charging terminal 60 can achieve 0-250kW power adaptive smooth output, and the charging current output range of each charging terminal 60 is 0-250A.

[0095] Combination Figure 7 As shown, in one embodiment of the present application, the power distribution device 70 includes at least one first switch group 71, each first switch group 71 is connected to the corresponding charging end 60, each charging end 60 includes a plurality of charging interfaces 61, and each first switch group 71 is configured to distribute the electric energy of the connected first power conversion device 40 to the plurality of charging interfaces 61 of the connected charging end 60 under the control of the control device 50.

[0096] That is, each charging end 60 is provided with a plurality of charging interfaces 61, and the electric energy of the first power conversion device 40 is distributed to the corresponding charging interfaces 61 by controlling the first switch group 71. The number of charging interfaces 61 may be less than or equal to the number of the first power conversion devices 40, and is not specifically limited.

[0097] by Figure 3 For example, each charging terminal 60 includes two charging interfaces 61, and four first power conversion devices 40 are provided corresponding to the two charging terminals 60, that is, the number of charging interfaces 61 in the system is equal to the number of first power conversion devices 40. Each charging terminal 60 is connected to two first power conversion devices 40 through a corresponding first switch group 71, and each first switch group 71 is composed of switches K11, K12, and K13. The specific connection can be referred to as shown in the accompanying drawings. Specifically, when the control switches K11 and K12 are closed and the switch K13 is disconnected, the two charging interfaces 61 in the charging terminal 60 are respectively allocated with the electric energy of one first power conversion device 40; when the control switches K11 and K13 are closed and the switch K12 is disconnected, one charging interface 61 in the charging terminal 60 is allocated with the electric energy of two first power conversion devices 40, and the other charging interface 61 has no electric energy distribution.

[0098] Combination Figure 8 As shown, in one embodiment of the present application, the charging terminal 60 includes multiple charging terminals, each charging terminal 60 includes a charging interface 61, and the power distribution device 70 includes a second switch group 72. The second switch group 72 is configured to distribute the electrical energy of multiple first power conversion devices 40 to the charging interfaces 61 of the multiple charging terminals 60 under the control of the control device 50.

[0099] That is, one charging terminal 60 corresponds to one charging interface 61, and the electric energy of the first power conversion device 40 is distributed to the corresponding charging terminal 60 by controlling the second switch group 72. The number of charging terminals 60 may be less than or equal to the number of first power conversion devices 40, and there is no specific limitation.

[0100] by Figure 8 For example, in the charging system, four first power conversion devices 40 are connected to four charging terminals 60 through the second switch tube group 72, wherein the second switch group 72 is composed of switches K21, K22, K23, ..., K27, and the specific connection can be referred to the attached figure. For example, when the control switches K21, K22, K23, and K24 are closed and the switches K25, K26, and K27 are disconnected, the charging interfaces 61 of the four charging terminals 60 are respectively allocated with the electric energy of one first power conversion device 40; and when the control switches K21, K25, K26, and K27 are closed and the switches K22, K23, and K24 are disconnected, the charging interface 61 of one charging terminal 60 is allocated with the electric energy of four first power conversion devices 40, and the charging interfaces 61 of the other three charging terminals 60 have no electric energy distribution.

[0101] Combination Figure 2As shown, in one embodiment of the present application, the transformer 30 further includes a second secondary winding 33, and the charging system further includes: a power supply device 80, which is connected to the second secondary winding 33 and is configured to supply power to the charging system.

[0102] That is to say, the transformer 30 further adds a set of second secondary windings 33, and the power supply device 80 is powered by the second secondary windings 33. The power supply device 80 distributes the output electric energy received from the second secondary windings 33 to the various modules of the charging system to power the various modules of the charging system.

[0103] Combination Fig. 9 As shown, in one embodiment of the present application, the charging system further includes a monitoring module 90 , which is suitable for communicating with the user terminal 300 , and is configured to obtain status information of the charging system and send the status information to the user terminal 300 .

[0104] Specifically, the user terminal 300 can be a terminal device equipped with a cloud platform, such as a computer, a mobile phone, etc. The monitoring module 90 is used to collect status information of the entire charging system, such as voltage, current, temperature and other data information, and upload the data information to the cloud platform through the communication module, so that the device data can be "powered on and uploaded to the cloud". Under the "end-edge-cloud" architecture, multiple inspections are performed on the end and cloud to improve data security.

[0105] Furthermore, the monitoring module 90 can also be integrated into the control device 50, so that the control device 50 can collect the underlying data information required for intelligence, that is, the status information of the charging system, to a greater extent while performing electrical management. In addition to the basic electrical management information (charging voltage, current, switching quantity, etc.), the underlying data information should also include the temperature, humidity, smoke, water immersion, ground lock, heater, fan, leakage current and other information of key components. In addition, in addition to the function of collecting the status information required for intelligence, the control device 50 also has the function of independently formulating protection strategies such as sorting, analyzing, storing, reprocessing and protecting the status information to improve charging safety and enhance user experience.

[0106] Combination Fig.10As shown, in one embodiment of the present application, the transformer 30 also includes a third secondary winding 34, and the charging system also includes: a second power conversion device 110 and / or a third power conversion device 120, the second power conversion device 110 is respectively connected to the energy storage interface 111 and the third secondary winding 34, and the third power conversion device 120 is respectively connected to the new energy interface 121 and the third secondary winding 34; wherein, in the case where the charging system includes the second power conversion device 110 and the third power conversion device 120, the control device 50 is also respectively connected to the second power conversion device 110 and the third power conversion device 120, and is configured to control multiple first power conversion devices 40, the second power conversion device 110 and the third power conversion device 120 to transfer electrical energy between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and the new energy interface 121.

[0107] Specifically, the second power conversion device 110 is connected to the energy storage device 400 through the energy storage interface 111, and the energy storage device 400 can be an external energy storage battery. The second power conversion device 110 can convert the electric energy provided by the third secondary winding 34 and output it to the energy storage device 400 for charging through the energy storage interface 111, and can also convert the electric energy provided by the energy storage device 400 and output it to the third secondary winding 34.

[0108] The third power conversion device 120 is connected to the new energy device 500 through the new energy interface 121. The new energy device 500 is used to convert new energy such as wind and light into electric energy for output. For example, the new energy device 500 is a photovoltaic system composed of photovoltaic modules. The third power conversion device 120 can convert the electric energy provided by the third secondary winding 34 and output it to the new energy device 500 through the new energy interface 121, and can also convert the electric energy provided by the new energy device 500 and output it to the third secondary winding 34.

[0109] In this embodiment, the energy storage device 400 and the new energy device 500 adopt a common AC bus mode and perform energy conversion through magnetic field coupling of a multi-secondary winding transformer to achieve power transmission between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and / or the new energy interface 121.

[0110] For example: when the charging system only includes the second power conversion device 110, the control device 50 can realize the transmission of electric energy between the power supply interface, at least one charging terminal 60, and the energy storage interface 111 by controlling the multiple first power conversion devices 40 and the second power conversion device 110; when the charging system only includes the third power conversion device 120, the control device 50 can control the multiple first power conversion devices 40 and the third power conversion device 120 to transmit electric energy between the power supply interface, at least one charging terminal 60 and the new energy interface 121; when the charging system includes the second power conversion device 110 and the third power conversion device 120, the control device 50 can control the multiple first power conversion devices 40, the second power conversion device 110 and the third power conversion device 120 to transmit electric energy between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and the new energy interface 121.

[0111] The charging system is developed based on a common AC bus architecture and is equipped with power conversion devices (a first power conversion device 40, a second power conversion device 110 and / or a third power conversion device 120). It has the ability to seamlessly integrate wind, light, storage, detection and charging, can achieve two-way interaction with the power grid, and can also be expanded into an integrated light-storage-charging device to expand a wider range of energy sources and broader application paths.

[0112] Combination Fig.11 As shown, in one embodiment of the present application, the charging system further includes: a second power conversion device 110 and / or a third power conversion device 120, a DC bus 130 and a plurality of fourth power conversion devices 140, the second power conversion device 110 is respectively connected to the energy storage interface 111 and the DC bus 130, the third power conversion device 120 is respectively connected to the new energy interface 121 and the DC bus 130, the plurality of fourth power conversion devices 140 are respectively connected to at least one charging terminal 60 and the DC bus 130, and the DC bus 130 is also connected to the plurality of first power conversion devices 4 0; wherein, in the case where the charging system includes a second power conversion device 110 and a third power conversion device 120, the control device 50 is also respectively connected to the second power conversion device 110, the third power conversion device 120 and a plurality of fourth power conversion devices 140, and is configured to control the plurality of first power conversion devices 40, the second power conversion device 110, the third power conversion device 120 and the plurality of fourth power conversion devices 140 to transfer electric energy between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and the new energy interface 121.

[0113] Specifically, the second power conversion device 110 can draw power from the DC bus 130 to output it to the energy storage device 400 for charging through the energy storage interface 111, or can convert the power provided by the energy storage device 400 and output it to the DC bus 130. Thus, the power transmission between the DC bus 130 and the energy storage interface 111, i.e., the energy storage device 400, can be realized based on the second power conversion device 110.

[0114] The third power conversion device 120 can draw power from the DC bus 130 to power the new energy device 500, and can also output the power generated by the new energy device 500 to the DC bus 130. Therefore, the power transmission between the DC bus 130 and the new energy interface 121, i.e., the new energy device 500, can be realized based on the third power conversion device 120.

[0115] The fourth power conversion device 140 is connected to the charging end 60, and can convert the electric energy provided by the DC bus 130 and output it to power the load. In addition, since the first power conversion device 40 is also connected to the charging end 60, the electric energy transfer between the power supply interface and the DC bus is realized based on the fourth power conversion device 140 and the first power conversion device 40.

[0116] Therefore, the charging system of this embodiment is developed based on a common DC bus architecture, and can realize the transmission of electric energy between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and / or the new energy interface 121 to achieve two-way interaction with the power grid. It can also be expanded into an integrated photovoltaic storage and charging device to expand a wider range of energy sources and wider application paths.

[0117] For example: when the charging system only includes the second power conversion device 110, the control device 50 can control multiple first power conversion devices 40, the second power conversion device 110 and multiple fourth power conversion devices 140 to transfer electric energy between the power supply interface, at least one charging terminal 60, and the energy storage interface 111; when the charging system only includes the third power conversion device 120, the control device 50 can control multiple first power conversion devices 40, the third power conversion device 120 and multiple fourth power conversion devices 140 to transfer electric energy between the power supply interface, at least one charging terminal 60 and the new energy interface 121; when the charging system includes the second power conversion device 110 and the third power conversion device 120, the control device 50 can control multiple first power conversion devices 40, the second power conversion device 110, the third power conversion device 120 and multiple fourth power conversion devices 140 to transfer electric energy between the power supply interface, at least one charging terminal 60, the energy storage interface 111 and the new energy interface 121.

[0118] Combination Fig.12As shown, in one embodiment of the present application, the first power conversion device 40 includes a heat dissipation duct 43 configured to dissipate heat for the first power conversion device 40 .

[0119] That is to say, each first power conversion device 40 is correspondingly provided with an independent heat dissipation duct 43. For example, a heat dissipation air inlet is provided at one end of the first power conversion device 40, and a heat dissipation air outlet is provided at the end opposite to the heat dissipation air inlet. A heat dissipation duct 43 is formed between the heat dissipation air inlet and the heat dissipation air outlet. Then, heat dissipation cold air enters from the heat dissipation air inlet and is discharged from the heat dissipation air outlet, thereby dissipating heat and cooling the first power conversion device 40.

[0120] This embodiment designs an independent air duct for the first power conversion device 40, thereby reducing the circulating air duct, lowering the working noise, and improving the heat dissipation effect.

[0121] In one embodiment of the present application, the charging system further includes: one or more of a dehumidification device, a heating device, a fire-fighting device, and a protection device to meet the requirements of the charging system and improve the life of the equipment. For example, the protection device can provide functions such as overcurrent protection, insulation detection, surge protection, and temperature detection and protection of the charging gun. The protection device can also communicate with the battery management system through the control device 50 to perform power limiting protection and other actions according to the current battery status of the load 200.

[0122] like Fig.13 As shown, in one embodiment of the present application, the charging system further includes: a box 10, a transformer 30, a plurality of first power conversion devices 40 and a control device 50 are arranged in the box 10, so as to improve the integration of the charging system, and at the same time save the application of low-voltage switch cabinets and connecting cables. Among them, the box 10 can adopt a common prefabricated cabin structure, and the protection level of the whole machine is high.

[0123] like Fig.14 As shown, in one embodiment of the present application, the charging system further includes a high-voltage power distribution device 20 , and the high-voltage power distribution device 20 is disposed in the box body 10 .

[0124] This embodiment integrates the high-voltage power distribution device 20, the transformer 30, a plurality of first power conversion devices 40 and the control device 50 in the box 10, further improving the integration of the charging system.

[0125] Combination Fig.15 As shown, in one embodiment of the present application, the box body 10 is separated into a high-voltage chamber 11, a transformer chamber 13 and a charging chamber 14, the high-voltage distribution device 20 is arranged in the high-voltage chamber 11, the transformer 30 is arranged in the transformer chamber 13, and a plurality of first power conversion devices 40 are arranged in the charging chamber 14.

[0126] That is to say, the high-voltage distribution device 20, the transformer 30 and the first power conversion device 40 are integrated in the prefabricated cabin, i.e., the box body 10. The prefabricated cabin is divided into three compartments, namely, the high-voltage chamber 11, the transformer chamber 13 and the charging chamber 14. Each compartment is separated by partitions for the installation of the high-voltage distribution device 20, the transformer 30 and the first power conversion device 40.

[0127] It should be noted that, when the control device 50 is relatively small, the control device 50 can be placed in the charging chamber 14, and when the control device 50 is relatively large, a separate compartment needs to be provided for placing the control device 50. For example, in one embodiment of the present application, the box body 10 is further separated into a low-voltage chamber 12, and the control device 50 is arranged in the low-voltage chamber 12.

[0128] That is to say, the box body 10 is divided into four compartments, namely a high voltage chamber 11, a low voltage chamber 12, a transformer chamber 13 and a charging chamber 14, for the installation of a high voltage distribution device 20, a control device 50, a transformer 30 and a first power conversion device 40.

[0129] In addition, the top crossbeam of the box body 10 can be directly made of No. 6 channel steel, so that the top crossbeam has better strength to meet the repeated lifting requirements of the box body 10 under complex working conditions and requirements such as ports.

[0130] In one embodiment of the present application, each of the high-voltage room 11, the low-voltage room 12, the transformer room 13 and the charging room 14 includes at least one room door, and the room doors of the transformer room 13 and the charging room 14 are fireproof doors.

[0131] That is to say, the doors of the transformer room 13 and the charging room 14 are both set as fire doors to meet the electrical safety requirements. The fire door can be set as an outward opening door or an inward opening door, which is not limited here. When the fire door is an outward opening door, the rotation angle of the fire door can be greater than or equal to 110°.

[0132] In one embodiment of the present application, the door of the transformer room 13 is provided with a cooling fan and vents, and the doors of the low-voltage room 12 and the charging room 14 are provided with vents, so as to provide a good exhaust and heat dissipation environment and improve the life of the equipment.

[0133] In one embodiment of the present application, the transformer chamber 13 includes a frame, a first chamber door, a second chamber door and a safety door. The first chamber door, the second chamber door and the safety door are arranged on the frame. The first chamber door is provided with a locking member, and the locking member is located inside the transformer chamber 13. The locking member selectively abuts against the frame to limit the position. The safety door is arranged corresponding to the second chamber door and is located inside the transformer chamber 13.

[0134] Specifically, in the relevant technical scheme, the front and rear sides of the transformer room 13 are both outward-opening doors. For daily maintenance and safety requirements, it is necessary to add a mesh door on the back of the front and rear doors of the transformer room 13 to achieve the safety protection function of preventing electric shock and opening the mesh door to cut off power when the transformer 30 is energized.

[0135] In the technical solution of the present application, the second door of the transformer room 13 is an outward opening door, and a safety door is provided corresponding to the second door, and the safety door is a mesh door, so as to realize the safety protection function of preventing electric shock and opening the mesh door to cut off the power when the transformer 30 is energized. The first door is an inward opening door, and is limited by a locking member, wherein the locking member can be in the form of an external hinge plus a latch.

[0136] For example, the second door is the front door of the transformer room 13, and the first door is the rear door of the transformer room 14. During the application process, personnel enter from the front door of the transformer room 13, i.e., the second door, and then quickly open the first door from inside the transformer 13, so that it can be used when front and rear maintenance and equipment entry and exit are required. In addition, the first door cannot be opened from the outside, and there is no need to consider the electrical safety issues solved by installing the mesh door, which can save mesh door materials, optimize the size of the whole machine, and reduce the amount of raw materials such as cabinets, cables, and channel steel.

[0137] The first door of the transformer chamber 13 of this embodiment is designed as an inward-opening door, which saves mesh door materials while meeting electrical safety requirements and also optimizes the overall structural size.

[0138] In one embodiment of the present application, the box 10 includes an outer shell and an inner wall, and a fireproof layer is provided between the outer shell and the inner wall, and a protective layer is provided on the surface of the outer shell. For example, fireproof rock wool, partitions and other materials are filled between the outer shell and the inner wall to form a fireproof layer through fireproof rock wool or partitions and other materials, and polyurethane coating is coated on the outer shell, so that the surface of the outer shell has a protective layer to improve the fireproof and corrosion resistance of the box 10.

[0139] In one embodiment of the present application, a water guide slope is formed on the top of the housing, and a water retaining portion is formed on the housing, the water retaining portion is located below the water guide slope and connected to the water guide slope. The slope of the water guide slope can be greater than or equal to 3%, and the water retaining portion is combined to prevent rainwater from entering the box body 10.

[0140] Furthermore, the high and low voltage side cables and communication lines arranged in the box 10 are laid concealed at the bottom, and are protected by metal hoses and have removable covers for wiring, so that the cables have a good working environment and aesthetics, while improving the convenience of maintenance operations.

[0141] Therefore, the charging system proposed in this application adopts the mode of integrated transformer and charger (host) + charging terminal 60 to integrate the transformer system and the charging system. Among them, the host part mainly includes a high-voltage distribution device 20, a transformer 30, a plurality of power conversion devices, a control device 50 and other equipment (such as a power distribution device 70, a dehumidification device, a heating device, a fire-fighting device and a protection device, etc.), and the host part is integrated in the prefabricated cabin, that is, the box 10. And the first power conversion device 40 integrates a filtering function, and the output power quality meets the requirements. Compared with the technical solutions in the related art, this application saves low-voltage cabinets and filter cabinets, and improves the efficiency of the charging system. In addition, the charging system can distribute power according to the charging demand through the power distribution device 70, which is suitable for the charging demand of large-capacity marine power batteries. In addition, when the charging system is applied to the field of ships, the charging system can also provide protection functions, such as overcurrent protection, insulation detection, surge protection, temperature detection and protection of the charging gun, etc., and communicate with the battery system of the ship, and perform power limiting protection according to the current state of the ship battery. In addition, the charging system can also be equipped with a human-machine interaction interface, which can be specifically set at the charging terminal 60. The operator can operate, monitor and diagnose the charging system through the human-machine interaction interface, and transmit the customer-specified data to the cloud platform through the 4G / 5G network.

[0142] Therefore, the charging system of the present application can be applied to the construction of charging and swapping stations for electric ships, which can enable electric ships to achieve fast charging and recharging at ports, greatly improve charging efficiency, increase ship utilization, and solve the concerns about the cruising range of electric ships.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A charging system, characterized in that: include: A transformer, a plurality of first power conversion devices, at least one charging terminal and a control device, wherein: The transformer comprises a primary winding and a plurality of first secondary windings, the primary winding is connected to the power supply interface, and each of the first secondary windings is connected to an input end of the corresponding first power conversion device; The output ends of the plurality of the first power conversion devices are connected to at least one of the charging ends; The control device is respectively connected to the plurality of the first power conversion devices and at least one of the charging ends, and is configured to control the plurality of the first power conversion devices and at least one of the charging ends to charge the load.

2. The charging system according to claim 1, characterized in that: Each of the first secondary windings is connected to an input end of a corresponding one of the first power conversion devices.

3. The charging system according to claim 1, characterized in that: The charging system further includes: a high-voltage power distribution device, which is arranged between the power supply interface and the primary winding.

4. The charging system according to claim 3, characterized in that: The high-voltage power distribution device includes at least one of a high-voltage incoming line module, a high-voltage metering module and a high-voltage outgoing line module; Among them, when the high-voltage power distribution device includes the high-voltage incoming line module, the high-voltage metering module and the high-voltage outgoing line module, the input end of the high-voltage incoming line module is connected to the power supply interface, the output end of the high-voltage outgoing line module is connected to the primary winding, the high-voltage metering module is arranged between the output end of the high-voltage incoming line module and the input end of the high-voltage outgoing line module, and the high-voltage outgoing line module includes a fuse.

5. The charging system according to claim 1, characterized in that: The charging system also includes: a power distribution device, which is arranged between the plurality of the first power conversion devices and at least one of the charging terminals, and is connected to the control device, and is configured to distribute the electrical energy of the plurality of the first power conversion devices to at least one of the charging terminals under the control of the control device.

6. The charging system according to claim 5, characterized in that: The power distribution device includes at least one first switch group, each of the first switch groups is connected to the corresponding first power conversion device and the charging end, each of the charging ends includes multiple charging interfaces, and each of the first switch groups is configured to distribute the electrical energy of the connected first power conversion device to the multiple charging interfaces of the connected charging end under the control of the control device.

7. The charging system according to claim 5, characterized in that: The charging end includes multiple charging ends, each of which includes a charging interface. The power distribution device includes a second switch group, and the second switch group is configured to distribute the electrical energy of multiple first power conversion devices to the charging interfaces of multiple charging ends under the control of the control device.

8. The charging system according to claim 1, characterized in that: The first power conversion device includes an IGBT power conversion module.

9. The charging system according to claim 1, characterized in that: The first power conversion device comprises a filter module, and the filter module is arranged at an input end of the first power conversion device and / or an output end of the first power conversion device.

10. The charging system according to any one of claims 1 to 9, characterized in that: The transformer further includes a second secondary winding, and the system further includes: a power supply device, wherein the power supply device is connected to the second secondary winding and is configured to supply power to the charging system.

11. The charging system according to any one of claims 1 to 9, characterized in that: The charging system further includes: a monitoring module, which is suitable for communicating with a user terminal and is configured to obtain status information of the charging system and send the status information to the user terminal.

12. The charging system according to any one of claims 1 to 9, characterized in that: The transformer further includes a third secondary winding, and the charging system further includes: a second power conversion device and / or a third power conversion device, the second power conversion device is respectively connected to the energy storage interface and the third secondary winding, and the third power conversion device is respectively connected to the new energy interface and the third secondary winding; Among them, when the charging system includes the second power conversion device and the third power conversion device, the control device is also connected to the second power conversion device and the third power conversion device respectively, and is configured to control multiple first power conversion devices, second power conversion devices and third power conversion devices to transfer electric energy between the power supply interface, at least one charging end, the energy storage interface and the new energy interface.

13. The charging system according to any one of claims 1 to 9, characterized in that: The charging system further comprises: a second power conversion device and / or a third power conversion device, a DC bus and a plurality of fourth power conversion devices, wherein the second power conversion device is respectively connected to the energy storage interface and the DC bus, the third power conversion device is respectively connected to the new energy interface and the DC bus, a plurality of the fourth power conversion devices are respectively connected to at least one of the charging terminals and the DC bus, and the DC bus is also connected to a plurality of the first power conversion devices; Among them, when the charging system includes the second power conversion device and the third power conversion device, the control device is also respectively connected to the second power conversion device, the third power conversion device and multiple fourth power conversion devices, and is configured to control multiple first power conversion devices, the second power conversion device, the third power conversion device and multiple fourth power conversion devices to transfer electric energy between the power supply interface, at least one charging end, the energy storage interface and the new energy interface.

14. The charging system according to any one of claims 1 to 9, characterized in that: The first power conversion device includes a heat dissipation duct configured to dissipate heat for the first power conversion device.

15. The charging system according to any one of claims 1 to 9, characterized in that: The charging system further includes: one or more of a dehumidification device, a heating device, a fire-fighting device and a protection device.

16. The charging system according to claim 1, characterized in that: The charging system further includes a box, in which the transformer, the plurality of the first power conversion devices and the control device are arranged.

17. The charging system according to claim 16, characterized in that: The charging system further comprises a high-voltage power distribution device, which is disposed in the box.

18. The charging system according to claim 17, characterized in that: The box body is divided into a high-voltage room, a transformer room and a charging room. The high-voltage power distribution device is arranged in the high-voltage room, the transformer is arranged in the transformer room, and the plurality of the first power conversion devices are arranged in the charging room.

19. The charging system according to claim 18, characterized in that: The box body is further divided into a low-pressure chamber, and the control device is arranged in the low-pressure chamber.

20. The charging system according to claim 19, characterized in that: Each of the high-voltage room, the low-voltage room, the transformer room and the charging room includes at least one room door, and the room doors of the transformer room and the charging room are fireproof doors.

21. The charging system according to claim 20, characterized in that: The door of the transformer room is provided with a cooling fan and a vent, and the doors of the low-voltage room and the charging room are provided with vents.

22. The charging system according to claim 18, characterized in that: The transformer chamber includes a frame, a first chamber door, a second chamber door and a safety door. The first chamber door, the second chamber door and the safety door are arranged on the frame. The first chamber door is provided with a locking member, and the locking member is located inside the transformer chamber. The locking member selectively abuts against the frame to limit the position. The safety door is arranged corresponding to the second chamber door and is located inside the transformer chamber.

23. The charging system according to claim 16, characterized in that: The box body comprises an outer shell and an inner wall, a fireproof layer is arranged between the outer shell and the inner wall, and a protective layer is arranged on the surface of the outer shell.

24. The charging system according to claim 23, characterized in that: A water guiding slope is formed on the top of the shell, and a water retaining portion is also formed on the shell. The water retaining portion is located below the water guiding slope and connected to the water guiding slope.

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