CN218805329U - Vehicle-mounted charging and discharging device based on V2G - Google Patents

Vehicle-mounted charging and discharging device based on V2G Download PDF

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CN218805329U
CN218805329U CN202222744257.0U CN202222744257U CN218805329U CN 218805329 U CN218805329 U CN 218805329U CN 202222744257 U CN202222744257 U CN 202222744257U CN 218805329 U CN218805329 U CN 218805329U
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China
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charging
grid
vehicle
discharging
unit
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CN202222744257.0U
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Inventor
万代
宋兴荣
赵邈
李金亮
李红青
周恒逸
朱吉然
张志丹
段绪金
彭思敏
羿敏
杨淼
唐海国
张帝
周可慧
王邹俊
莫文慧
邓威
陈伟
由凯
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

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Abstract

The utility model relates to the technical field of power distribution networks, and discloses a V2G-based vehicle-mounted charging and discharging device, which comprises a vehicle-mounted V2X emergency power supply, wherein the vehicle-mounted V2X emergency power supply mainly comprises a human-computer interaction unit, a power control unit and a grid-connected and off-grid switching unit, the human-computer interaction unit is connected with the input end of the power control unit, and the output end of the power control unit is connected with the input end of the grid-connected and off-grid switching unit; the defects of complex structure, high cost and low efficiency of the traditional bidirectional converter circuit in the V2G technology are overcome, and the requirements of two working modes of the same circuit are met.

Description

Vehicle-mounted charging and discharging device based on V2G
Technical Field
The utility model relates to a distribution network technical field especially relates to a Vehicle-mounted charging and discharging device based on V2G (Vehicle-to-grid, electric automobile to electric wire netting interactive technology).
Background
At present, the grid-connected access device is generally a photovoltaic power generation device, a wind power generation device and other micro-grid power generation or energy storage devices, the new energy power generation device is high in input cost and greatly influenced by climate environmental factors, and the requirements of mobility, portability and the like cannot be met due to the construction characteristics of the new energy power generation device and the energy storage devices. There is a need for a fast grid-connected access device that is low cost and highly portable. In a traditional application mode, most 0.4kV emergency power supply vehicles do not have a parallel operation and grid connection function, so the following situations can be met in application: (1) the emergency power supply vehicle is likely to force a user to experience multiple short-time power failures when the emergency power supply vehicle is connected to and disconnected from the user side busbar; (2) the access of the emergency power supply vehicle can only shorten the power failure time of a user during the sudden power failure of the mains supply; (3) when complex projects such as replacement of user transformers and the like are carried out without power outage, the emergency power supply vehicle is limited in use.
Therefore, in the prior art, the conversion of bidirectional electric energy between a power grid and an automobile storage battery is difficult to realize, and a low-cost and high-portability quick grid-connected access device is urgently needed to meet the requirement of quick grid connection of a low-voltage overhead line.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vehicle-mounted charging and discharging device based on V2G to solve the problem that exists among the prior art.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the utility model provides an on-vehicle charging and discharging device based on V2G, include: the vehicle-mounted V2X emergency power supply mainly comprises a human-computer interaction unit, a power control unit and a grid-connected and off-grid switching unit, wherein the human-computer interaction unit is connected with the input end of the power control unit, and the output end of the power control unit is connected with the input end of the grid-connected and off-grid switching unit.
Optionally, the human-computer interaction unit mainly comprises an intelligent electric meter, a card reader and a display screen, and the intelligent electric meter, the card reader and the display screen are all connected with the power control unit.
Optionally, the power control unit mainly comprises a V2G power module, a control panel, a communication board, an auxiliary power supply, a control protection unit, and a background communication, the background communication is connected to the communication board through a network, the card reader is connected to the communication board, and the V2G power module, the communication board, the auxiliary power supply, and the control protection unit are all connected to the control panel.
Optionally, the grid-connected and off-grid switching unit is configured to implement an automatic grid-connected and off-grid switching function of charging and discharging.
Optionally, the vehicle-mounted emergency power supply further comprises a V2G charging and discharging machine, the V2G charging and discharging machine is connected with the vehicle-mounted V2X emergency power supply, and the V2G charging and discharging machine comprises a front-stage bidirectional AC/DC converter and a rear-stage bidirectional DC/DC converter which are connected in parallel.
Optionally, the V2G charge-discharge machine further includes a charge-discharge module, and an output end of the charge-discharge module is connected to the battery-side converter.
Optionally, the V2G charging and discharging machine further includes a grid-side controller, and the grid-side controller adopts a double closed-loop control manner of a voltage outer loop and a current inner loop.
Has the beneficial effects that:
the utility model provides a vehicle-mounted charging and discharging device based on V2G, the device include vehicle-mounted V2X emergency power supply, vehicle-mounted V2X emergency power supply mainly comprises man-machine interaction unit, power control unit and grid-connected and off-grid switching unit, the man-machine interaction unit is connected with the input of power control unit, the output of power control unit with the input of grid-connected and off-grid switching unit is connected; the defects of complex structure, high cost and low efficiency of the traditional bidirectional converter circuit in the V2G technology are overcome, and the requirements of two working modes of the same circuit are met.
Drawings
FIG. 1 is a block diagram of the overall control scheme of the preferred embodiment of the present invention;
FIG. 2 is a functional block diagram of a preferred embodiment of the present invention;
FIG. 3 is a system topology diagram of the preferred embodiment of the present invention;
fig. 4 is a secondary wiring diagram of the preferred embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and the like in the description of the invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and the like are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1 to 4, the present application provides a vehicle-mounted charging and discharging device based on V2G, including: the vehicle-mounted V2X emergency power supply mainly comprises a human-computer interaction unit, a power control unit and a grid-connected and off-grid switching unit, wherein the human-computer interaction unit is connected with the input end of the power control unit, and the output end of the power control unit is connected with the input end of the grid-connected and off-grid switching unit.
The vehicle-mounted charging and discharging device based on the V2G comprises a vehicle-mounted V2X emergency power supply, wherein the vehicle-mounted V2X emergency power supply mainly comprises a human-computer interaction unit, a power control unit and a grid-connected and off-grid switching unit, the human-computer interaction unit is connected with the input end of the power control unit, and the output end of the power control unit is connected with the input end of the grid-connected and off-grid switching unit; the defects of complex structure, high cost and low efficiency of the traditional bidirectional converter circuit in the V2G technology are overcome, and the requirements of two working modes of the same circuit are met.
Optionally, the human-computer interaction unit mainly comprises an intelligent electric meter, a card reader and a display screen, and the intelligent electric meter, the card reader and the display screen are all connected with the power control unit.
In this embodiment, the man-machine interaction unit is used for setting functions such as charging and discharging management, charging management, system parameter setting, and user management.
Optionally, the power control unit mainly comprises a V2G power module, a control panel, a communication board, an auxiliary power supply, a control protection unit, and a background communication, where the background communication is connected to the communication board through a network, the card reader is connected to the communication board, and the V2G power module, the communication board, the auxiliary power supply, and the control protection unit are all connected to the control panel.
In this embodiment, the power control unit mainly accomplishes start-up, operation, real time monitoring and the stop of charge-discharge process, gathers on-vehicle BMS data, power module input/output data simultaneously and can upload the data to the backstage in real time through multiple communication mode.
Optionally, the grid-connected and off-grid switching unit is configured to implement an automatic grid-connected and off-grid switching function of charging and discharging.
Optionally, the vehicle-mounted emergency power supply further comprises a V2G charging and discharging machine, the V2G charging and discharging machine is connected with the vehicle-mounted V2X emergency power supply, and the V2G charging and discharging machine comprises a front-stage bidirectional AC/DC converter and a rear-stage bidirectional DC/DC converter which are connected in parallel.
In this embodiment, the front-stage bidirectional AC/DC converter and the rear-stage bidirectional DC/DC converter of the V2G charging and discharging machine are relatively independent, and the targets to be achieved by the converters are different from each other, and they can be controlled separately.
Optionally, the V2G charge-discharge machine further includes a charge-discharge module, and an output end of the charge-discharge module is connected to the battery-side converter.
Optionally, the V2G charging and discharging machine further includes a grid-side controller, and the grid-side controller adopts a double closed-loop control manner of a voltage outer loop and a current inner loop.
The charge and discharge module adopts a hysteresis comparison control mode, compares the voltage and the current magnitude detected in real time with a given value, and the hysteresis output controls the duty ratio of a battery side converter so as to realize constant-current and constant-voltage charging and Boost chopping conversion during grid connection; the power grid side controller realizes charging adaptation and grid-connected inversion of the power grid side converter by adopting a double closed loop control mode of a voltage outer loop and a current inner loop. The utility model overcomes complicated, with high costs, the inefficiency shortcoming of traditional two-way conversion circuit structure in the V2G technique has realized the requirement of two kinds of mode of operation of same circuit operation.
The device mainly realizes the following functions of charging the electric automobile, emergency power supply and virtual power plant:
electric automobile charges the function, mainly undertake by portable integrated form charge-discharge control system, will be with on-vehicle BMS communication, control BMS data, this function is the basic function, avoids electric automobile deflagration, explosion, and the priority is highest.
Emergent power supply function mainly is undertaken by electric automobile emergent guarantor's power supply control APP, on the basis that satisfies electric motor car BMS demand guarantee function, and the demand of the electric wire netting side or the user side of guarantor's electricity as required formulates control strategy, controls portable integrated form charge-discharge control system and discharges according to the instruction.
The virtual power plant can also be used as a virtual power plant to participate in virtual peak regulation and peak elimination on the power grid side together with an electric vehicle emergency/power protection power supply.
When the electric automobile needs to be charged, the AC mains supply is converted into a 200-750VDC power supply through a vehicle-mounted V2X emergency power supply to charge a vehicle-mounted battery; when emergency AC power supply is needed, electric energy stored in the vehicle-mounted battery system is converted into 380Vac/220Vac alternating-current power supply to an alternating-current micro grid (V2G) or alternating-current equipment (V2L) through a vehicle-mounted V2X emergency power supply.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (7)

1. The utility model provides an on-vehicle charge-discharge device based on V2G which characterized in that includes: the vehicle-mounted V2X emergency power supply is composed of a human-computer interaction unit, a power control unit and a grid-connected and off-grid switching unit, wherein the human-computer interaction unit is connected with the input end of the power control unit, and the output end of the power control unit is connected with the input end of the grid-connected and off-grid switching unit.
2. The V2G-based vehicle-mounted charging and discharging device according to claim 1, wherein the human-computer interaction unit is composed of an intelligent electric meter, a card reader and a display screen, and the intelligent electric meter, the card reader and the display screen are all connected with the power control unit.
3. The V2G-based vehicle-mounted charging and discharging device according to claim 2, wherein the power control unit is composed of a V2G power module, a control board, a communication board, an auxiliary power supply, a control protection unit and background communication, the background communication is connected with the communication board through a network, the card reader is connected with the communication board, and the V2G power module, the communication board, the auxiliary power supply and the control protection unit are all connected with the control board.
4. The V2G-based vehicle-mounted charging and discharging device according to claim 1, wherein the grid-connected and off-grid switching unit is used for realizing an automatic grid-connected and off-grid switching function of charging and discharging.
5. The V2G-based vehicle-mounted charging and discharging device according to claim 1, further comprising a V2G charging and discharging machine, wherein the V2G charging and discharging machine is connected with the vehicle-mounted V2X emergency power supply, and the V2G charging and discharging machine comprises a front-stage bidirectional AC/DC converter and a rear-stage bidirectional DC/DC converter which are connected in parallel.
6. The V2G-based vehicle-mounted charging and discharging device according to claim 5, wherein the V2G charging and discharging machine further comprises a charging and discharging module, and an output end of the charging and discharging module is connected with the battery-side converter.
7. The V2G-based vehicle-mounted charging and discharging device according to claim 5, wherein the V2G charging and discharging machine further comprises a power grid side controller, and the power grid side controller adopts a double closed loop control mode of a voltage outer loop and a current inner loop.
CN202222744257.0U 2022-10-18 2022-10-18 Vehicle-mounted charging and discharging device based on V2G Active CN218805329U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222744257.0U CN218805329U (en) 2022-10-18 2022-10-18 Vehicle-mounted charging and discharging device based on V2G

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222744257.0U CN218805329U (en) 2022-10-18 2022-10-18 Vehicle-mounted charging and discharging device based on V2G

Publications (1)

Publication Number Publication Date
CN218805329U true CN218805329U (en) 2023-04-07

Family

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Family Applications (1)

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Country Status (1)

Country Link
CN (1) CN218805329U (en)

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