10kV skid-mounted charging station

Abstract

The invention discloses a 10kV skid-mounted charging station, and relates to the field of charging stations for electric vehicles, and a skid-mounted shell of the 10kV skid-mounted charging station is internally provided with a first converter chamber and a transformer chamber; the converter unit is arranged on the upper surface of the air conditioner indoor unit; the converter unit comprises a control unit, a dynamic dormancy module, a rectification module and a metering protection module. After high voltage of grid power enters the power transformer through the high-voltage protection cabinet, a charging winding of the power transformer is output to the charging terminal through the dynamic dormancy module of the converter unit, the direct current output of the rectifier module and the metering protection module, and finally an electric automobile is charged through the charging terminal. The control unit obtains information of the power transformation unit, the current transformation unit and the vehicle-mounted battery management system BMS and executes and controls charging of the electric vehicle. The electric vehicle charging device can be integrally moved or moved in a vehicle-mounted mode, has the advantage of being small in occupied area, and improves the charging convenience of the electric vehicle.

Description

Technical Field

[0001] The invention relates to the field of charging stations for electric vehicles, and in particular to a 10kV skid-mounted charging station. Background Art

[0002] Most of the existing electric vehicle charging stations are installed and debugged on site using substations and integrated charging piles or split charging piles. Generally, the distance between the charging pile and the substation is tens to hundreds of meters, and the low-voltage cable has a large line loss. In addition, the equipment area occupied by this type of charging station construction plan is as high as tens of square meters, which is a waste of resources. Summary of the invention

[0003] The object of the present invention is to provide a 10kV skid-mounted charging station that can be moved as a whole or on a vehicle, has the characteristics of a small footprint, and improves the convenience of charging electric vehicles.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A 10kV skid-mounted charging station, wherein a first current conversion chamber and a power conversion chamber are arranged in a skid-mounted housing of the 10kV skid-mounted charging station;

[0006] The substation room is provided with a substation unit and an air conditioner outdoor unit; the substation unit includes: a high-voltage protection cabinet and a power transformer; the position of the high-voltage outlet jack at the bottom of the high-voltage protection cabinet corresponds to the position of the high-voltage inlet jack on the cover plate of the power transformer, and the conductive connector is inserted into the high-voltage outlet jack of the high-voltage protection cabinet and the high-voltage inlet jack of the power transformer;

[0007] The first converter room is provided with a converter unit and an air conditioner indoor unit; the converter unit is placed on the upper surface of the air conditioner indoor unit; the converter unit is connected to the charging terminal; the converter unit includes: a control unit, a dynamic sleep module, a rectifier module and a metering protection module; the dynamic sleep module and the metering protection module are placed in the structural body of the rectifier module to form an integral structure and electrical connection; after the grid high voltage enters the power transformer through the high voltage protection cabinet, the charging winding of the power transformer passes through the dynamic sleep module of the converter unit, and the DC output of the rectifier module is output to the charging terminal through the metering protection module, and finally the electric vehicle is charged through the charging terminal;

[0008] The control unit obtains information from the power conversion unit, the current conversion unit and the vehicle-mounted battery management system BMS, and executes and controls the charging of the electric vehicle.

[0009] Optionally, the control unit includes: a charging management system software CMS and a microgrid energy management system software EMS;

[0010] The charging management system software CMS is used to obtain information from the substation, converter and onboard battery management system BMS, and to execute and control the charging of electric vehicles;

[0011] The energy management system software EMS is used to obtain the basic layer information of photovoltaic voltage and current signals in the source-grid-load-storage microgrid, voltage and current signals on the 10kV grid side, voltage and current signals on the load side, and voltage and current signals on the energy storage side, and issue dispatch control commands;

[0012] The specific charging process is:

[0013] In the first step, the user inserts the charging gun into the electric vehicle;

[0014] The second step is to obtain the vehicle battery related information through the vehicle battery management system BMS, wake up the dynamic sleep module through the control unit, turn on the AC path switch, and feed back to the control unit;

[0015] In the third step, the control unit adjusts and controls the output of the rectifier module according to the information obtained by the vehicle battery management system BMS to meet the needs of the vehicle battery;

[0016] In the fourth step, the control unit collects information from the metering protection module and feeds back the suspension or end demand information to the control unit;

[0017] In the fifth step, the control unit integrates the information obtained by the vehicle battery management system BMS and the information collected by the metering protection module, and sends a command to suspend or end charging to the rectifier module and the metering protection module;

[0018] In the sixth step, the control unit controls the dynamic sleep module to enter the sleep state again.

[0019] Optionally, the rectifier module adopts a V2G module; the V2G module is a first-level conversion topology bidirectional AC / DC three-phase full-bridge circuit, and is a two-level or three-level principle structure;

[0020] An EMI filter, an LCL or CL filter and an AC circuit breaker are arranged on the AC side of the rectifier module; an EMI filter and a DC circuit breaker are arranged on the DC side of the rectifier module.

[0021] Optionally, the AC side of the rectifier module is connected to the charging winding of the power transformer; the DC side of the rectifier module is output to the charging terminal via the metering protection module.

[0022] Optionally, the charging gun of the charging terminal is a liquid-cooled or non-liquid-cooled charging gun.

[0023] Optionally, the first flow conversion chamber is a closed heat-insulating space.

[0024] Optionally, the charging station further comprises: a second current conversion chamber; the second AC chamber has the same structure as the first AC chamber;

[0025] The first converter chamber and the second converter chamber are disposed on both sides of the transformer chamber; the control units in the two converter chambers are connected to each other;

[0026] Among them, the 10k grid power is connected to the 10kV winding of the power transformer through the high-voltage protection cabinet; the photovoltaic inverter power frequency output is connected to the photovoltaic winding of the power transformer; the PCS power frequency output of the external battery energy storage unit is connected to the energy storage winding of the power transformer.

[0027] Optionally, the charging station further comprises: an energy storage room; the energy storage room comprises: a battery energy storage unit and an air conditioner indoor unit; the battery energy storage unit is connected to the control unit;

[0028] Among them, the 10k grid power is connected to the 10kV winding of the power transformer through the high-voltage protection cabinet; the photovoltaic inverter power frequency output is connected to the photovoltaic winding of the power transformer.

[0029] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0030] The 10kV skid-mounted charging station provided by the present invention arranges the first converter room and the transformer room in the skid-mounted shell; that is, each unit is integrated into the skid-mounted shell, and the charging station that moves the entirety of the skid-mounted shell is used to charge electric vehicles; it can be widely used in various application scenarios such as heavy trucks, mining trucks, engineering vehicles, and electric ships; the present invention constitutes an integrated photovoltaic storage and charging device, which occupies an area of ​​only a dozen square meters, and is pre-installed in the factory, with light on-site construction and no debugging required. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the composition of a 10kV skid-mounted charging station provided in Example 1;

[0033] Figure 2 A component structure layout diagram of a 10kV skid-mounted charging station provided in Example 1;

[0034] Figure 3 This is the schematic diagram of the V2G charging module of the converter unit;

[0035] Figure 4 The bidirectional two-level AC / DC power TOP diagram of the V2G charging module of the converter unit;

[0036] Figure 5 This is the TOP diagram of the bidirectional AC / DC power of the V2G charging module of the converter unit;

[0037] Figure 6 A schematic diagram of a 10kV skid-mounted charging station provided in Example 2

[0038] Figure 7 This is a component structure layout diagram of a 10kV skid-mounted charging station provided in Example 2. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The object of the present invention is to provide a 10kV skid-mounted charging station that can be moved as a whole or on a vehicle, has the characteristics of a small footprint, and improves the convenience of charging electric vehicles.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] like Figure 1-Figure 5 As shown, a first converter chamber 2, a transformer chamber 3 and a second converter chamber 2 are arranged in a skid-mounted housing 1 of a 10kV skid-mounted charging station, and the first converter chamber 2 is a closed heat-insulating space; the above structure constitutes a 10kV skid-mounted photovoltaic storage super charging station; the first converter chamber 2 and the second converter chamber 2 are disposed on both sides of the transformer chamber 3; the control units 13 in the two converter chambers 2 are connected to each other;

[0044] The transformer room 3 is provided with a transformer unit 7 and an air conditioner outdoor unit 4; the transformer unit 7 includes: a high-voltage protection cabinet 8 and a power transformer 9; the high-voltage protection cabinet 8 is placed on the surface of the cover plate of the power transformer 9, and the high-voltage protection cabinet 8 and the power transformer 9 are an integral fixed structure;

[0045] In order to realize the high-voltage electrical connection between the high-voltage protection cabinet 8 and the power transformer 9; the position of the high-voltage outlet jack at the bottom of the high-voltage protection cabinet 8 corresponds to the position of the high-voltage incoming jack on the cover of the power transformer 9, and the conductive connector is inserted into the high-voltage outlet jack of the high-voltage protection cabinet 8 and the high-voltage incoming jack of the power transformer 9; the 10k grid power is connected to the 10kV winding of the power transformer 9 through the high-voltage protection cabinet 8; the photovoltaic inverter power frequency output is connected to the photovoltaic winding 17 of the power transformer 9; the PCS power frequency output of the external battery energy storage unit 18 is connected to the energy storage winding of the power transformer 9.

[0046] The first converter chamber 2 is provided with a converter unit 6 and an air conditioner indoor unit 5; the converter unit 6 is placed on the upper surface of the air conditioner indoor unit 5; the converter unit 6 is connected to the charging terminal 15;

[0047] The converter unit 6 includes: a control unit 13, a dynamic sleep module 10, a rectifier module 11 and a metering protection module 12; the dynamic sleep module 10 and the metering protection module 12 are placed in the structural body of the rectifier module 11 to form an integral structure and electrical connection; after the grid high voltage passes through the high voltage protection cabinet 8 and enters the power transformer 9, the charging winding of the power transformer 9 passes through the dynamic sleep module 10 of the converter unit 6, and the DC output of the rectifier module is output to the charging terminal 15 through the metering protection module 12, and finally the electric vehicle is charged through the charging terminal 15;

[0048] The control unit 13 obtains information from the power conversion unit 7 , the current conversion unit 6 and the vehicle-mounted battery management system BMS, and executes and controls the charging of the electric vehicle.

[0049] The control unit 13 includes: a charging management system software CMS and a microgrid energy management system software EMS;

[0050] The charging management system software CMS is used to obtain information from the power conversion unit 7, the current conversion unit 6 and the on-board battery management system BMS, and to execute and control the charging of the electric vehicle;

[0051] Energy management system software EMS is used for energy management system software EMS to obtain the basic layer information of photovoltaic voltage and current signals in the source-grid-load-storage microgrid, voltage and current signals on the 10kV grid side, voltage and current signals on the load side, and voltage and current signals on the energy storage side; optimize the management and control instructions of the source-grid-load-storage microgrid according to the four main principles of efficient energy utilization, staggered energy storage power consumption strategy, local optimal consumption of new energy, and priority of economic benefits, and issue dispatching control commands for the flow direction and flow of each energy source of the source-grid-load-storage, respectively, and track and close-loop control the flow direction and flow of each energy source in real time;

[0052] The specific charging process is:

[0053] In the first step, the user inserts the charging gun into the electric vehicle;

[0054] The second step is to obtain the vehicle battery related information through the vehicle battery management system BMS, wake up the dynamic sleep module 10 through the control unit 13, turn on the AC path switch, and feed back to the control unit 13;

[0055] In the third step, the control unit 13 adjusts and controls the output of the rectifier module 11 according to the information obtained by the vehicle battery management system BMS to meet the requirements of the vehicle battery;

[0056] In the fourth step, the control unit 13 collects information from the metering protection module 12 and feeds back the suspension or end demand information to the control unit 13;

[0057] In the fifth step, the control unit 13 integrates the information obtained by the vehicle battery management system BMS and the information collected by the metering protection module 12, and sends a command to suspend or end charging to the rectifier module 11 and the metering protection module 12;

[0058] In step 6, the control unit 13 controls the dynamic sleep module 10 to enter the sleep state again.

[0059] The rectifier module 11 adopts a V2G module; the V2G module is a first-level conversion topology bidirectional AC / DC three-phase full-bridge circuit, and is a two-level or three-level principle structure;

[0060] An EMI filter, an LCL or CL filter and an AC circuit breaker are provided on the AC side of the rectifier module 11 ; an EMI filter and a DC circuit breaker are provided on the DC side of the rectifier module 11 .

[0061] The AC side of the rectifier module 11 is connected to the charging winding of the power transformer 9 ; the DC side of the rectifier module 11 is output to the charging terminal 15 via the metering protection module 12 .

[0062] The charging gun of the charging terminal 15 is a liquid-cooled or non-liquid-cooled charging gun.

[0063] Example 2

[0064] like Figure 3-Figure 7 As shown, a first converter chamber 2, a transformer chamber 3 and an energy storage chamber 19 are arranged in the skid-mounted shell 1 of the 10kV skid-mounted charging station; the energy storage chamber 19 includes: a battery energy storage unit and an air-conditioning indoor unit 5; the battery energy storage unit is connected to the control unit 13; the above structure constitutes a 10kV skid-mounted built-in battery energy storage unit 14 super charging station; the remaining structure of the 10kV skid-mounted built-in battery energy storage unit 14 super charging station is the same as the 10kV skid-mounted photovoltaic super charging station provided in Example 1.

[0065] Among them, the 10k grid power is connected to the 10kV winding of the power transformer 9 through the high-voltage protection cabinet 8; the photovoltaic inverter power frequency output is connected to the photovoltaic winding 17 of the power transformer 9.

[0066] The 10kV skid-mounted solar-storage super charging station provided by the present invention has the following advantages:

[0067] 1. The integrated photovoltaic storage and charging equipment only occupies an area of ​​more than ten square meters;

[0068] 2.10kV transformer and charging are integrated, and the line loss is only 1 / 20-1 / 60 of 380V;

[0069] 3.10kV skid-mounted super charging station, factory pre-installed, light on-site construction and no debugging required;

[0070] 4.IP65 module room solves the three fears and three protection problems of electronic power devices: fear of heat, fear of water and fear of dust;

[0071] 5. The skid-mounted structure facilitates overall migration or vehicle-mounted mobility; this 10kV skid-mounted solar-storage supercharging station can be widely used in a variety of application scenarios such as heavy trucks, mining trucks, engineering vehicles, and electric ships.

[0072] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A 10kV skid-mounted charging station, characterized in that: The first current conversion chamber and the power conversion chamber are arranged in the skid-mounted housing of the 10kV skid-mounted charging station; The substation room is provided with a substation unit and an air conditioner outdoor unit; the substation unit includes: a high-voltage protection cabinet and a power transformer; the position of the high-voltage outlet jack at the bottom of the high-voltage protection cabinet corresponds to the position of the high-voltage inlet jack on the cover plate of the power transformer, and the conductive connector is inserted into the high-voltage outlet jack of the high-voltage protection cabinet and the high-voltage inlet jack of the power transformer; The first converter room is provided with a converter unit and an air conditioner indoor unit; the converter unit is placed on the upper surface of the air conditioner indoor unit; the converter unit is connected to the charging terminal; the converter unit includes: a control unit, a dynamic sleep module, a rectifier module and a metering protection module; the dynamic sleep module and the metering protection module are placed in the structural body of the rectifier module to form an integral structure and electrical connection; after the grid high voltage enters the power transformer through the high voltage protection cabinet, the charging winding of the power transformer passes through the dynamic sleep module of the converter unit, and the DC output of the rectifier module is output to the charging terminal through the metering protection module, and finally the electric vehicle is charged through the charging terminal; The control unit obtains information from the power conversion unit, the current conversion unit and the vehicle-mounted battery management system BMS, and executes and controls the charging of the electric vehicle.

2. A 10kV skid-mounted charging station according to claim 1, characterized in that: The control unit includes: charging management system software CMS and microgrid energy management system software EMS; The charging management system software CMS is used to obtain information from the power conversion unit, current conversion unit and vehicle battery management system BMS, and execute and control the charging of electric vehicles; The energy management system software EMS is used to obtain the basic layer information of photovoltaic voltage and current signals in the source-grid-load-storage microgrid, voltage and current signals on the 10kV grid side, voltage and current signals on the load side, and voltage and current signals on the energy storage side, and issue dispatch control commands; The specific charging process is: In the first step, the user inserts the charging gun into the electric vehicle; The second step is to obtain the vehicle battery related information through the vehicle battery management system BMS, wake up the dynamic sleep module through the control unit, turn on the AC path switch, and feed back to the control unit; In the third step, the control unit adjusts and controls the output of the rectifier module according to the information obtained by the vehicle battery management system BMS to meet the needs of the vehicle battery; In the fourth step, the control unit collects information from the metering protection module and feeds back the suspension or end demand information to the control unit; In the fifth step, the control unit integrates the information obtained by the vehicle battery management system BMS and the information collected by the metering protection module, and sends a command to suspend or end charging to the rectifier module and the metering protection module; In the sixth step, the control unit controls the dynamic sleep module to enter the sleep state again.

3. A 10kV skid-mounted charging station according to claim 1, characterized in that: The rectifier module adopts a V2G module; the V2G module is a first-level conversion topology bidirectional AC / DC three-phase full-bridge circuit, and is a two-level or three-level principle structure; An EMI filter, an LCL or CL filter and an AC circuit breaker are arranged on the AC side of the rectifier module; an EMI filter and a DC circuit breaker are arranged on the DC side of the rectifier module.

4. A 10kV skid-mounted charging station according to claim 3, characterized in that: The AC side of the rectifier module is connected to the charging winding of the power transformer; the DC side of the rectifier module is output to the charging terminal through the metering protection module.

5. The 10kV skid-mounted charging station according to claim 1, characterized in that: The charging gun of the charging terminal is a liquid-cooled or non-liquid-cooled charging gun.

6. A 10kV skid-mounted charging station according to claim 1, characterized in that: The first flow conversion chamber is a closed heat-insulating space.

7. A 10kV skid-mounted charging station according to any one of claims 1 to 6, characterized in that: The charging station also includes: a second current conversion chamber; the second AC chamber has the same structure as the first AC chamber; The first converter chamber and the second converter chamber are disposed on both sides of the transformer chamber; the control units in the two converter chambers are connected to each other; Among them, the 10k grid power is connected to the 10kV winding of the power transformer through the high-voltage protection cabinet; the photovoltaic inverter power frequency output is connected to the photovoltaic winding of the power transformer; the PCS power frequency output of the external battery energy storage unit is connected to the energy storage winding of the power transformer.

8. A 10kV skid-mounted charging station according to any one of claims 1 to 6, characterized in that: The charging station also includes: an energy storage room; the energy storage room includes: a battery energy storage unit and an air conditioner indoor unit; the battery energy storage unit is connected to the control unit; Among them, the 10k grid power is connected to the 10kV winding of the power transformer through the high-voltage protection cabinet; the photovoltaic inverter power frequency output is connected to the photovoltaic winding of the power transformer.

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