High-power direct-current charging system

Abstract

The utility model discloses a high-power direct-current charging system, which comprises a plurality of charging terminals, a plurality of power supply modules and a charging control module, the number of the power supply modules is consistent with that of quick charging guns in the quick charging terminal, and each power supply module comprises a plurality of power supply units; one power supply unit in each power supply module is connected to one fast charging gun in the fast charging terminal through an output bus and a first switch; in each power supply module, the output buses of the power supply units are connected in series through a second switch to form a ring topology, and are connected with another output bus in diagonal relation with the output buses through a third switch; at least one output bus is set in the power supply module to serve as a first allocation bus, the other output bus serves as a second allocation bus, the first allocation bus and the second allocation bus are connected through a fourth switch, and the second allocation bus and the first allocation bus are spaced by at least one second switch and are not connected through a third switch. The charging system can reduce the number of direct current switches and simplify the control logic on the premise of meeting the vehicle charging requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of charging systems, in particular to a high-power direct current charging system. Background Art

[0002] With the development of the new energy vehicle industry, the existing electric vehicle battery capacity and charging rate have gradually increased, and the required power consumption has also increased further. Previously, when allocating power in a high-power charging system, multiple power supply units were generally centralized to a single charging gun, thereby expanding the charging power of a single charging gun to meet the vehicle's power demand. In this charging system, full-matrix and full-ring topologies are often used to achieve power allocation, which requires a large number of DC switches, resulting in high hardware costs, numerous switching lines, and complex control logic. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a high-power DC charging system, which can reduce the number of DC switches and simplify the control logic while meeting the charging requirements of the vehicle.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Technical Solution 1: A high-power DC charging system, comprising: a plurality of charging terminals, including a plurality of fast-charging terminals, each of which comprises at least two fast-charging guns; a plurality of power supply modules, the number of which is the same as the number of fast-charging guns in the fast-charging terminal, each of which comprises a plurality of power supply units, the number of which is the same as the number of the charging terminals, each of which is provided with an output bus; for each fast-charging terminal, each power supply module has a power supply unit connected to a fast-charging gun in the fast-charging terminal via the output bus and a first switch provided on the output bus; in each power supply module, the output of each power supply unit is The lines are connected in series through a second switch to form a ring topology, and when the number of output buses is an even number, another output bus that is diagonally related to it is connected through a third switch; in each power supply module, at least one output bus is set as a first allocation bus, and another output bus is set as a second allocation bus, and the two are connected through a fourth switch, wherein the second allocation bus and the first allocation bus are separated by at least one second switch, and are not connected through the third switch; and a charging control module, which controls the opening and closing of each switch according to the power request of the charging terminal to allocate the required power to the charging terminal.

[0006] Technical solution 2 is based on technical solution 1: the charging terminal also includes at least one supercharging terminal, and each supercharging terminal includes a supercharging gun; for each supercharging terminal, each power supply module has a power supply unit connected in parallel to the supercharging gun in the supercharging terminal through an output bus and a first switch provided on the output bus.

[0007] Technical solution three, which is based on technical solution two: one of the first dispatching bus or the second dispatching bus is connected to the supercharging terminal.

[0008] Technical solution four, which is based on technical solution three: also includes a fifth switch; between the output buses of multiple power supply units belonging to different power supply modules connected to each fast charging terminal, a fifth switch is connected in series to allocate the power of the power supply unit connected to the same fast charging terminal to different fast charging guns of the fast charging terminal.

[0009] Technical solution five, which is based on technical solution four: also includes a plurality of charging piles, each of the first switch and the fifth switch is integrated and installed in the corresponding charging pile, and the fast charging gun or super charging gun is arranged on the charging pile.

[0010] Technical solution six, which is based on technical solution four: it also includes a number of charging piles and a split chassis, each of the first switch and the fifth switch is integrated and installed in the split chassis, the split chassis is connected to the corresponding charging pile, and the fast charging gun or super charging gun is arranged on the charging pile.

[0011] Technical Solution 7, which is based on Technical Solution 4: also includes a cabinet, in which each of the power supply modules, the second switch, the third switch, the fourth switch and the charging control module are integrated and installed.

[0012] Technical Solution 8, which is based on Technical Solutions 5 to 7: Each of the fast charging guns and super charging guns is provided with an identification unit, which is used to identify the required power of the device to be charged and transmit it to the charging control module for matching with the power required by the corresponding charging terminal.

[0013] Technical Solution Nine is based on Technical Solution Eight: in the power supply module, the output power of each power supply unit is 40kW, and the number of power supply units is 12; the number of fast charging terminals is 12.

[0014] Technical solution ten is based on technical solution eight: in the power supply module, the output power of each power supply unit is 40kW, and the number of power supply units is 12; the number of fast charging terminals is n, and the number of super charging terminals is 12-n, where n is an integer greater than or equal to 0 and less than or equal to 12.

[0015] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0016] Technical solution 1 provides a high-power DC charging system, which includes multiple charging terminals, which can charge multiple devices to be charged at the same time, or charge multiple terminals of a single charging device with multiple charging connectors at the same time.

[0017] These charging terminals may include a fast charging terminal, which includes at least two fast charging guns, and the number of fast charging guns in each fast charging terminal is the same; at the same time, a number of power supply modules are set, the number of power supply modules is consistent with the number of fast charging guns in the fast charging terminal, and these fast charging guns can be connected one by one to the power supply units in different power supply modules through an output bus. That is to say, when a fast charging terminal is provided with multiple fast charging guns, the first fast charging gun can be connected to a power supply unit in the first power supply module, and the second fast charging gun can be connected to a power supply unit in the second power supply module in order of arrangement. This arrangement allows a fast charging terminal to output the power of multiple power supply modules at the same time. When this fast charging terminal charges a device to be charged at the same time, it can ensure that the charging power of the device to be charged meets the demand, and the probability of the output bus connected to the fast charging terminal being occupied is low, and the power allocation is more flexible.

[0018] In addition, a ring topology is formed between each power supply unit in each power supply module through the second switch, which simplifies the overall wiring logic, makes it easy to identify and control each branch line, greatly reduces the number of switches used, and saves hardware costs. At the same time, the output buses in a diagonal relationship are connected through the third switch, which increases the power allocation path of each power supply unit. In this way, even if some power supply units are supplying power to the fast charging gun connected to it through the first switch, the power of the power supply units with a longer interval can be allocated through the third switch. In addition, in order to ensure the power demand of some charging terminals, at least one output bus is set as the first allocation bus, and another output bus is set as the second allocation bus. The two are connected through the fourth switch. When the charging terminals connected to the first allocation bus need a larger charging power, even if there are multiple power supply units separated from the second allocation bus and the power cannot be allocated through the second switch and the third switch, the power of the second allocation bus can be directly allocated to the first allocation bus through the fourth switch, thereby meeting the power demand of the charging terminal. In this way, the larger charging power demand of some of the devices to be charged can be met without adding too many switches.

[0019] The charging control module can control the opening and closing of each switch according to the power consumption request of the charging terminal, that is, it can open and close each switch according to the manually set power allocation rules, flexibly dispatch the power of each power supply unit, and the allocation method is flexible and variable. The charging process is stable and safe, and it is not easy for a single charging terminal to be insufficiently powered.

[0020] In technical solution two, at least one supercharging terminal is also set in the charging terminal. The charging power of the supercharging terminal is higher than that of the fast charging terminal. The supercharging gun of each supercharging terminal is simultaneously connected to a power supply unit of different power supply modules, which can provide sufficient charging power output for the supercharging terminal.

[0021] In technical solution three, connecting one of the first allocation bus or the second allocation bus to the supercharging terminal can further ensure that sufficient power is allocated to the supercharging terminal to meet the power demand of the supercharging terminal.

[0022] In technical solution four, a fifth switch is set at the charging terminal. The fifth switch can be used to control the connection relationship between multiple output buses connected to the same fast charging terminal. When a fast charging gun located at the same fast charging terminal has a greater power demand, if other fast charging guns of the fast charging terminal are idle, the fifth switch can be closed to allocate the power of the power supply units connected to other fast charging guns to the fast charging gun in use, thereby improving the charging efficiency of the device to be charged.

[0023] In technical solution five, when the device to be charged is an electric vehicle, since each charging pile is arranged corresponding to each charging parking space, the first switch and the fifth switch are integrated and installed on the corresponding charging pile, so that the charging gun connected to it can be installed nearby on the charging pile, which is convenient for each electric vehicle to use the corresponding charging gun nearby to achieve convenient charging.

[0024] In Technical Solution 6, if the installation space required for each first switch and fifth switch is large, they can be installed in a split chassis first, and then connected to each corresponding charging pile to achieve a stable connection; each charging gun is installed on its corresponding charging pile for nearby charging.

[0025] In Technical Solution 7, cabinets are set up to facilitate the separate layout within the charging station. Multiple charging piles and cabinets can be distributed at multiple points to improve charging efficiency.

[0026] In technical solution eight, an identification unit is provided on the charging gun to facilitate the identification of the power demand of the device to be charged and transmit it to the charging control module.

[0027] In Technical Solution Nine, the output power of the power supply unit in a power supply module is set to 40kW, and the number is 12. At the same time, the number of fast charging terminals is 12, which can provide sufficient charging power and charging positions for multiple devices to be charged.

[0028] In the technical solution ten, a supercharging terminal can be set up, which can improve the charging efficiency of the charging equipment that meets the configuration requirements and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of a charging system provided in Example 1 of the utility model;

[0031] Figure 2 This is a schematic diagram of the charging system provided in Example 2 of the utility model.

[0032] Description of main reference numerals:

[0033] Charging terminal 1; first switch 11; fifth switch 12; fast charging gun 13; super charging gun 14; output control unit 15;

[0034] Power supply module 2; power supply unit 21;

[0035] Output bus 30; second switch 31; third switch 32; fourth switch 33. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0038] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0039] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0040] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0041] Embodiment 1:

[0042] Embodiment 1 of the present utility model provides a high-power DC charging system, which includes a plurality of charging terminals 1, a plurality of power supply modules 2 and a charging control module.

[0043] The multiple charging terminals 1 included in the charging system are all equipped with charging guns, wherein the multiple charging terminals 1 include several fast charging terminals, and each fast charging terminal includes at least two fast charging guns 13. Figure 1 In this embodiment, 12 fast charging terminals are provided, respectively represented by P1 to P12; each fast charging terminal is provided with two fast charging guns 13. In other embodiments, the number of fast charging terminals can be increased or decreased, for example, 10 fast charging terminals or 20 fast charging terminals are provided, and the number of fast charging guns 13 in each fast charging terminal can also be increased, for example, three fast charging guns 13 are provided or four fast charging guns 13 are provided. Among them, each fast charging gun 13 is provided with an identification unit, through which the power required by the device to be charged can be obtained. In actual use, the multiple fast charging guns 13 of each fast charging terminal can charge multiple devices to be charged at the same time, and can also charge multiple terminals of a device to be charged at the same time.

[0044] Reference Figure 1 , the number of power supply modules 2 is consistent with the number of fast charging guns 13 in the fast charging terminal. In this embodiment, the number of power supply modules 2 is two. Each power supply module 2 includes a plurality of power supply units 21 of the same number as the charging terminal 1, and each power supply unit 21 is provided with an output bus 30. In this embodiment, each power supply module 2 includes 12 power supply units 21, respectively represented by M1 to M12, and the rated output power of each power supply unit 21 is 40kW, and the total rated output power of each power supply module 2 is 480kW. In this embodiment, there are two power supply modules 2, and the total rated output power is 960kW.

[0045] For each fast charging terminal, each power supply module 2 has a power supply unit 21 connected to a fast charging gun 13 in the fast charging terminal through an output bus 30 and a first switch 11 disposed on the output bus 30. Figure 1 Taking the P1 fast charging terminal as an example, it includes two fast charging guns 13, one of which is connected to the M1 power supply unit 21 through the L1 output bus 30 in the first power supply module 2, and the other fast charging gun 13 is connected to the M1 power supply unit 21 through the L1 output in the second power supply module 2. That is to say, the two power supply modules 2 respectively connect the internal M1 power supply unit 21 to the P1 fast charging terminal through the L1 output bus 30, but the two power supply units 21 are respectively connected to two fast charging guns 13.

[0046] At the same time, refer to Figure 1 , a fifth switch 12 is also provided. Between the output buses 30 of multiple power supply units 21 belonging to different power supply modules 2 connected to each fast charging terminal, a fifth switch 12 is connected in series to allocate the power of the power supply unit 21 connected to the same fast charging terminal to different fast charging guns 13 of the fast charging terminal. Taking the fast charging terminal P1 as an example, a fifth switch 12 is connected in series between the two L1 output buses 30 connected to two fast charging guns 13. When the fifth switch 12 is disconnected, the two L1 output buses 30 each supply power to the corresponding fast charging gun 13. When the fifth switch 12 is closed, the first switch 11 of one of the L1 output buses 30 is disconnected, and the power of the power supply unit 21 corresponding to this L1 output bus 30 can be allocated to another fast charging gun 13, thereby concentrating the power of the two power supply units 21 on one fast charging gun 13, thereby increasing the charging power of the fast charging gun 13. At this time, the other fast charging gun 13 in the fast charging terminal cannot charge the device to be charged, but if a new device to be charged uses this fast charging gun 13 at this time, the fifth switch 12 connected to the output bus 30 can also be disconnected, and the first switch 11 on it can be turned on to readjust the charging power of each fast charging gun 13.

[0047] The first switch 11 and the fifth switch 12 may be integrated into an output control unit 15, which may be disposed on the charging terminal 1 for easy configuration.

[0048] Reference Figure 1 In each power supply module 2, the output buses 30 of the power supply units 21 are connected in series through the second switch 31 to form a ring topology, and when the number of output buses 30 is even, another output bus 30 diagonally connected to it is connected through the third switch 32. The diagonal relationship here refers to the two output buses 30 with corresponding serial numbers in the ring topology circuit structure formed by the output buses 30. For example, Figure 1In the figure, the total number of power supply modules 2 is 12, then M1 corresponds to M7, M2 corresponds to M8, and so on, so that all output buses 30 are also connected through the second switch 31. In the case of no power allocation, each output bus 30 will only charge the device to be charged with the output power of the power supply unit 21 connected to itself; at the same time, a first switch 11 is set between each output bus 30 to form a ring topology, and a second switch 31 is set to connect the power supply units 21 at the diagonal position, forming a star ring topology structure, which allows each charging terminal 1 to allocate the charging power of other idle power supply units 21 when charging, so as to achieve higher power charging; and compared with the full ring or full rectangular topology, this topology structure reduces the number of switches, has low hardware cost, a small number of switching lines, and reduces the complexity of the control logic.

[0049] At the same time, refer to Figure 1 In each power supply module 2, at least one output bus 30 is set as the first allocation bus, and another output bus 30 is set as the second allocation bus, and the two are connected through a fourth switch 33, wherein the second allocation bus and the first allocation bus are separated by at least one second switch 31, and are not connected through a third switch 32.

[0050] Reference Figure 1 In the power supply module 2 provided in this embodiment, a fourth switch 33 is provided, and the fourth switch 33 is connected to the two output buses 30 of L1 and L9, wherein L1 can be defined as the first allocation bus, and L2 can be defined as the second allocation bus, wherein L1 and L9 are separated by 8 second switches 31, and are not directly connected through the third switch 32. In the case where the fourth switch 33 is not provided, when the charging terminal 1 corresponding to L8, L10 and L2 is occupied, the power supply unit 21 corresponding to L9 cannot allocate power to other charging terminals 1 because power allocation needs to be performed through other output buses 30. By providing the fourth switch 33, the power of M1 can be directly allocated to M9, and the power of M9 can also be directly allocated to M1, thereby improving the power allocation efficiency of P1 or P9. Of course, in a switch module, multiple fourth switches 33 can be provided to improve the efficiency of power allocation. In actual use, P1 can be set as a charging terminal 1 with better power allocation capability for use.

[0051] The charging control module can control the opening and closing of each switch according to the power request of the charging terminal 1 to allocate the required power to the charging terminal 1. Among them, the identification unit set on the charging gun of the fast charging terminal can quickly obtain the power demand of the device to be charged by obtaining parameters such as voltage and current after the fast charging gun 13 is connected to the device to be charged, and then send the power demand to the charging control module. The charging control module can control the opening and closing of each switch according to the pre-set power allocation rules, and allocate the corresponding power to the fast charging gun 13. Among them, each of the above switches is an electrical switch, which can be a relay, a contactor or a MOS tube.

[0052] In this embodiment, the charging terminal 1 may include a number of charging piles. When the device to be charged is an electric vehicle, each charging pile corresponds to a parking space, and each charging pile is connected to a charging gun, which can charge the electric vehicle parked in the parking space. Among them, the first switch 11 and the fifth switch 12 corresponding to the charging gun can be integrated in the charging pile. In the case where a fast charging terminal includes two fast charging guns 13, two charging piles can be set. The two charging piles can be set with a first switch 11 connected to the corresponding fast charging gun 13, and the fifth switch 12 between the output buses 30 corresponding to the two fast charging guns 13 can be selected to be set on one of the charging piles. Alternatively, a charging pile can be connected to two charging guns, which are set between two parking spaces, and can charge two electric vehicles at the same time.

[0053] Alternatively, in other embodiments, the charging terminal 1 may include a plurality of charging piles and a split chassis. The charging piles are arranged corresponding to the parking spaces, and the split chassis integrates the first switch 11 and the fifth switch 12, which are then connected to the corresponding charging piles, and the charging piles are provided with a fast charging gun 13 or a super charging gun 14 for charging.

[0054] At the same time, a cabinet can also be set up, and the power supply module 2, the second switch 31, the third switch 32, the fourth switch 33 and the charging control module can be integrated and installed in the cabinet, and the cabinet is then connected to the charging pile, which is convenient for the separate layout of the charging station and improves the utilization efficiency of each charging pile.

[0055] Embodiment 2:

[0056] Embodiment 2 of the present invention provides a high-power DC charging system. The difference between the charging system and embodiment 1 is that the charging terminal 1 includes a supercharging terminal in addition to a fast charging terminal.

[0057] Specifically, the charging terminal 1 also includes at least one supercharging terminal, each of which includes a supercharging gun 14; for each supercharging terminal, each power supply module 2 has a power supply unit 21 connected in parallel to the supercharging gun 14 in the supercharging terminal through an output bus 30 and a first switch 11 provided on the output bus 30. In addition, one of the first dispatching bus or the second dispatching bus is connected to the supercharging terminal.

[0058] Reference Figure 2 In this embodiment, two supercharging terminals are provided, namely S1 and S2. Each supercharging terminal includes a supercharging gun 14, which is simultaneously connected to one power supply unit 21 in two power supply modules 2. Of course, in other embodiments, if there are more power supply modules 2, the supercharging gun 14 can be simultaneously connected to one power supply unit 21 in multiple power supply modules 2 to increase the basic charging power of the supercharging gun 14.

[0059] In order to improve the power allocation efficiency of the supercharging terminal, one of the first allocation bus or the second allocation bus is connected to the supercharging terminal, for example, Figure 2 In the example, the L1 output bus 30 as the first allocation bus is connected to the supercharging terminal S1. With this configuration, compared with other charging terminals 1, the supercharging terminal S1 can have a higher power allocation efficiency and can maintain a higher charging power in a more severe charging situation.

[0060] Accordingly, in practical applications, a charging pile can be provided with a super charging gun 14 and two first switches 11, or the first switch 11 can be integrated in a split chassis and then connected to the charging pile, or a cabinet can be set up, and the charging pile is used to set the charging gun.

[0061] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A high-power DC charging system, characterized in that: include: A plurality of charging terminals (1), including a plurality of fast charging terminals, each of the fast charging terminals including at least two fast charging guns (13); A plurality of power supply modules (2), the number of which is consistent with the number of fast charging guns (13) in the fast charging terminal, each power supply module (2) comprising a plurality of power supply units (21) of the same number as the charging terminal (1), each of the power supply units (21) being provided with an output bus (30); for each fast charging terminal, each power supply module (2) has a power supply unit (21) connected to a fast charging gun (13) in the fast charging terminal via the output bus (30) and a first switch (11) provided on the output bus (30); in each power supply module (2), the output of each power supply unit (21) is connected to the output of the fast charging gun (13) in the fast charging terminal; The output buses (30) are connected in series via a second switch (31) to form a ring topology, and when the number of the output buses (30) is an even number, another output bus (30) that is diagonally connected to the output bus (30) is connected via a third switch (32); in each power supply module (2), at least one output bus (30) is set as a first allocation bus, and another output bus (30) is set as a second allocation bus, and the two are connected via a fourth switch (33), wherein the second allocation bus and the first allocation bus are separated by at least one second switch (31), and are not connected via the third switch (32); and A charging control module controls the opening and closing of each switch according to the power consumption request of the charging terminal (1) so as to allocate the required power to the charging terminal (1).

2. A high-power DC charging system as claimed in claim 1, characterized in that: The charging terminal (1) also includes at least one supercharging terminal, and each of the supercharging terminals includes a supercharging gun (14); for each supercharging terminal, each power supply module (2) has a power supply unit (21) connected in parallel to the supercharging gun (14) in the supercharging terminal via an output bus (30) and a first switch (11) provided on the output bus (30).

3. A high-power DC charging system as claimed in claim 2, characterized in that: One of the first dispatching bus or the second dispatching bus is connected to the supercharging terminal.

4. A high-power DC charging system as claimed in claim 3, characterized in that: The invention also includes a fifth switch (12); between output buses (30) of a plurality of power supply units (21) belonging to different power supply modules (2) connected to respective fast charging terminals, a fifth switch (12) is connected in series to allocate power of the power supply unit (21) connected to the same fast charging terminal to different fast charging guns (13) of the fast charging terminal.

5. A high-power DC charging system as claimed in claim 4, characterized in that: It also includes a plurality of charging piles, wherein each of the first switch (11) and the fifth switch (12) is integrated and installed in the corresponding charging pile, and the fast charging gun (13) or the super charging gun (14) is arranged on the charging pile.

6. A high-power DC charging system as claimed in claim 4, characterized in that: It also includes a plurality of charging piles and a split chassis, wherein each of the first switch (11) and the fifth switch (12) is integrated and installed in the split chassis, the split chassis is connected to the corresponding charging pile, and the fast charging gun (13) or the super charging gun (14) is arranged on the charging pile.

7. A high-power DC charging system as claimed in claim 4, characterized in that: It also includes a cabinet, in which each of the power supply modules (2), each of the second switches (31), the third switch (32), the fourth switch (33) and the charging control module are integrated and installed.

8. A high-power DC charging system according to any one of claims 5 to 7, characterized in that: Each of the fast charging guns (13) and super charging guns (14) is provided with an identification unit, which is used to identify the power required by the device to be charged and transmit it to the charging control module so that it can be matched with the power required by the corresponding charging terminal (1).

9. A high-power DC charging system as claimed in claim 8, characterized in that: In the power supply module (2), the output power of each power supply unit (21) is 40 kW, and the number of power supply units (21) is 12; and the number of fast charging terminals is 12.

10. A high-power DC charging system as claimed in claim 8, characterized in that: In the power supply module (2), the output power of each power supply unit (21) is 40 kW, and the number of power supply units (21) is 12; the number of fast charging terminals is n, and the number of super charging terminals is 12-n, where n is an integer greater than or equal to 0 and less than or equal to 12.

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