New energy automobile charging control system and method based on micro-grid
By setting up expandable charging piles and multi-circuit designs on the left side of the charging pile group, the problem of insufficient charging demand for new energy vehicle charging stations is solved, charging efficiency and user experience is improved, and the energy consumption capacity and benefits of the microgrid are enhanced.
Patent Information
- Application Number
- CN202510757649.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2025-07-08
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, new energy vehicle charging stations cannot meet the charging needs of a large number of electric vehicles, resulting in queuing or congestion in charging stations, poor user charging experience, low usage efficiency of microgrid charging piles, and insufficient distributed energy consumption level.
A new energy vehicle charging control system based on microgrid is designed. By setting up an expandable expansion charging pile on the left side of the charging pile group, using multiple charging loops and microgrid expansion busbars, the expansion and flexible distribution of the charging piles are achieved. The controller controls the movement of the expansion device to conduct or disconnect the branch circuit, and provides an additional charging interface.
It improves the efficiency of microgrid charging piles, improves the timeliness of user charging, reduces queuing and congestion of charging stations, enhances user experience, and improves the distributed energy consumption level and benefits of microgrids.
Smart Images

Figure CN120270072A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of microgrids, and particularly relates to a new energy vehicle charging control system and method based on a microgrid. Background Art
[0002] With the vigorous development of energy microgrids, great progress has been made in the research, development, and utilization of new energy generation technologies. Building smart grids, accelerating the development of distributed generation, and improving the safety, stability, reliability, and power quality of power systems are the current development trends. Microgrid technology represents a development trend of distributed energy supply systems and is an important part of intelligent power distribution and utilization systems, which is of great significance for promoting energy conservation and emission reduction and realizing sustainable energy development. The significant increase in wind energy and photovoltaic new energy has led to the need for the power grid to enhance its capacity to accommodate new energy, distributed power sources, and diverse loads, accelerate the construction of new energy microgrid projects, and explore microgrid technologies and operation management systems suitable for the development of new energy. Most of the electric energy generated by photovoltaic, wind turbines, fuel cells, battery energy storage units, etc. in the microgrid is direct current or non-power frequency alternating current; common electrical equipment, such as electric vehicles and LED lighting, is driven by converting to direct current through corresponding adapters. If the above-mentioned power generation units or loads are connected to an AC microgrid, a multi-level energy conversion device composed of corresponding power electronic converters such as DC-DC, DC-AC, and AC-DC is required. If connected to a DC microgrid with an appropriate voltage level, some AC-DC conversion devices can be omitted, reducing costs and losses. DC microgrids are also an important direction for the development of microgrids.
[0003] In addition, the development of the new energy vehicle industry dominated by electric vehicles has entered the fast lane. In particular, intelligent driving is an important current development direction for automobiles. The development of new energy electric vehicles has led to problems in the matching of charging scheduling and distribution in the microgrid with fast charging outside the user. Additionally, if the user's vehicle is fully charged at the charging pile parking space but the user does not drive the vehicle away in time, even if the charging pile has the charging capacity, it cannot charge other users' new energy vehicles, which not only brings the problem of reduced utilization efficiency of microgrid charging piles but also causes the problem that users waiting to charge cannot charge in time.
[0004] In summary, the charge and discharge control of DC microgrids and electric vehicles will surely become an important direction for future DC microgrid technologies. Currently, a series of electric vehicle charging stations have been established in China. However, the development of electric vehicles is faster than the construction of electric vehicle charging stations, resulting in the charging stations being unable to meet the charging needs of a large number of newly added electric vehicles, and the phenomenon of queuing or congestion at the charging stations urgently needs to be solved. Summary of the Invention
[0005] The object of the present invention is to provide a new energy vehicle charging control system and method based on a microgrid, which can, firstly, improve the utilization efficiency of the microgrid charging piles, secondly, enhance the timeliness of user charging to increase the user experience, and thirdly, reduce queuing or congestion at charging stations.
[0006] A new energy vehicle charging control system based on a microgrid includes multiple horizontally arranged charging piles and a controller. The multiple charging piles are all connected to the DC bus of the microgrid, and the controller is arranged in the box body of any one of the charging piles. One parking space is arranged on each of the upper and lower sides of each charging pile. Each charging pile has 2 charging circuits to supply the corresponding upper and lower parking spaces respectively. The upper charging circuit of each charging pile branches into an upper first branch and an upper second branch, and the lower charging circuit of each charging pile branches into a lower first branch and a lower second branch. The upper first branch supplies the corresponding upper parking space, and the lower first branch supplies the corresponding lower parking space. The upper second branch and the lower second branch are respectively connected to the extended bus of the microgrid. The DC bus of the microgrid and the extended bus of the microgrid are connected in parallel. An extended charging pile is arranged on the left side of the charging pile group composed of multiple charging piles. The extended charging pile is fixed on an extended device, and the extended device can be controlled by the controller to move linearly along the arrangement direction of the multiple charging piles and has two states: an unfolded state and a non-unfolded state. The extended charging pile is connected to the extended bus of the microgrid through a cable.
[0007] Preferably, switching devices are respectively arranged in the upper first branch, the upper second branch, the lower first branch and the lower second branch, and the switching devices are controlled by the controller to control the conduction and disconnection of the corresponding branches.
[0008] Preferably, when the extended device is in the non-unfolded state, the distance between the extended charging pile and the left side of the charging pile group is the smallest; when the extended device is in the unfolded state, the distance between the extended charging pile and the left side of the charging pile group is the largest.
[0009] Preferably, when the extended device is in the unfolded state, one rechargeable extended parking space is extended on each of the upper and lower sides of the extended charging pile. The extended charging pile has 2 charging interfaces to supply the upper rechargeable extended parking space and the lower rechargeable extended parking space respectively.
[0010] Preferably, when the extended device is in the non-unfolded state, the upper second branch and the lower second branch corresponding to each charging pile are both in the disconnected state.
[0011] Preferably, when the extended device is in the non-unfolded state, the distance between the leftmost side line of the extended device and the leftmost side line of the upper parking space or the leftmost side line of the lower parking space is less than or equal to 30 cm.
[0012] Preferably, when the expansion device is in the deployed state, the distance between the leftmost side line of the expanded charging pile and the leftmost side line of the upper parking space or the leftmost side line of the lower parking space is less than or equal to 250 cm.
[0013] Preferably, the expansion device is a retractable door. A bracket is fixed between the middle two rows of columns of the retractable door, and the expanded charging pile is fixed on the bracket.
[0014] Preferably, the retractable door is made of stainless steel. The housing of the expanded charging pile and each charging pile is connected to the fixed side pillar of the retractable door through a flexible copper wire.
[0015] A control method for a new energy vehicle charging control system based on a microgrid includes the following steps: Step S1, when the new energy vehicle in any parking space is fully charged and there are no other vacant parking spaces, the controller sends a message to the user of the new energy vehicle; Step S2, if the user does not feedback the information of moving the vehicle within the preset time; Step S21, the controller controls the expansion device to move linearly to the deployed state; the controller disconnects the upper first branch or the lower first branch corresponding to the new energy vehicle, and conducts the upper second branch or the lower second branch. The electricity on the charging pile corresponding to the new energy vehicle passes through the upper second branch or the lower second branch, and is transmitted to the expanded charging pile through the microgrid expansion bus and the cable. The expanded charging pile uses its two charging interfaces to supply the vehicles to be charged in the upper rechargeable expanded parking space and / or the lower rechargeable expanded parking space respectively; Step S3, if the user feedbacks the information of moving the vehicle within the preset time, and the controller monitors that the vehicle has not been moved after the vehicle moving time feedback by the user, return to step S21.
[0016] Beneficial technical effects: First, improve the use efficiency of the microgrid charging pile; second, improve the timeliness of user charging, thereby enhancing the user experience; third, reduce the queuing or congestion at the charging station; fourth, improve the consumption level of the microgrid distributed energy; fifth, increase the revenue of the microgrid. Description of the Drawings
[0017] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments, and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 It is a microgrid system diagram.
[0018] Figure 2 It is a layout diagram of charging piles in a microgrid charging station.
[0019] Figure 3 It is a schematic diagram of new energy vehicle charging in a microgrid charging station.
[0020] Figure 4 It is a schematic diagram of the microgrid extended busbar in an embodiment of the present invention.
[0021] Figure 5 It is a schematic diagram of the marked microgrid extended busbar in another embodiment of the present invention.
[0022] Figure 6 It is a schematic diagram when the extended charging pile in the embodiment of the present invention is in the unfolded state.
[0023] Figure 7 It is a schematic diagram when the extended charging pile in the embodiment of the present invention is in the deployed state.
[0024] Figure 8 It is a schematic diagram of the extension device in an embodiment of the present invention.
[0025] Figure 9 It is a schematic diagram of the position when the extension device of the present invention is in the unfolded state.
[0026] Figure 10 It is a schematic diagram of the orientation of the charging pile of the present invention. Detailed implementation manners
[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0028] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.
[0029] Embodiment 1 As Figure 1As shown, for the new energy vehicle charging control system based on a microgrid, in the microgrid, distributed energy is directly connected to the DC bus of the microgrid, the AC power supply is connected to the DC bus of the microgrid through a converter, the battery is connected to the DC bus of the microgrid through an inverter, and one end of the charging pile is connected to the DC bus of the microgrid and the other end is connected to the new energy vehicle.
[0030] As Figure 2 shown, multiple charging piles 2 are arranged horizontally, and multiple charging piles 2 are all connected to the DC bus 4 of the microgrid. Optionally, one parking space is arranged on each of the upper side and the lower side of each charging pile 2, and each charging pile 2 has 2 charging circuits to supply the upper parking space 1 and the lower parking space 3 respectively.
[0031] As Figure 3 shown, when the new energy vehicle in the leftmost upper parking space 1 is fully charged and there are no other vacant parking spaces, and there are other users queuing up for charging in the microgrid charging station, on the one hand, the charging demand of the waiting users cannot be met, on the other hand, it brings a user experience of difficult charging to the users, on the third hand, it increases the waiting time of the users, on the fourth hand, it reduces the utilization efficiency of the charging pile 2 corresponding to the leftmost upper parking space 1 and reduces the charging income of the microgrid, and on the fifth hand, it causes the problem of grid connection and consumption of distributed energy in the microgrid.
[0032] As Figure 4 and Figure 5 shown, to solve the foregoing problems, the upper charging circuit of each charging pile 2 branches into an upper first branch 2101 and an upper second branch 2102, the lower charging circuit of each charging pile 2 branches into a lower first branch 2201 and a lower second branch 2202, the upper first branch 2101 supplies the corresponding upper parking space 1, and the lower first branch 2201 supplies the corresponding lower parking space 3.
[0033] Preferably, the upper second branch 2102 and the lower second branch 2202 are respectively connected to the microgrid extended bus 5.
[0034] It can be understood that the microgrid DC bus 4 and the microgrid extended bus 5 are in parallel.
[0035] Optionally, switching devices are respectively arranged in the upper first branch 2101, the upper second branch 2102, the lower first branch 2201 and the lower second branch 2202, and the switching devices are controlled by a controller to control the conduction and disconnection of the corresponding branches.
[0036] Preferably, the controller is arranged in the box body of any one of the charging piles 2 in the charging pile group.
[0037] As Figure 6 , Figure 7 , Figure 8 and Figure 10As shown in the figure, an extended charging pile 8 is provided on the left side of a charging pile group composed of multiple charging piles 2. The extended charging pile 8 is fixed on an extension device 7. The extension device 7 can move linearly along the arrangement direction of the multiple charging piles 2 and has two states: an undeployed state and a deployed state. When the extension device 7 is in the undeployed state, the distance between the extended charging pile 8 and the left side of the charging pile group is the smallest; when the extension device 7 is in the deployed state, the distance between the extended charging pile 8 and the left side of the charging pile group is the largest.
[0038] Preferably, the extended charging pile 8 is connected to the microgrid extended bus 5 through a cable 6.
[0039] Preferably, when the extension device 7 is in the deployed state, a rechargeable extended parking space is extended on each of the upper side and the lower side of the extended charging pile 8.
[0040] Preferably, the extended charging pile 8 has 2 charging interfaces to supply the upper rechargeable extended parking space K1 and the lower rechargeable extended parking space K2 respectively.
[0041] Preferably, the extended charging pile 8 has 2 charging interfaces, which are 801 and 802 respectively.
[0042] Specifically, when the extension device 7 is in the deployed state, the distance between the extended charging pile 8 and the left side of the charging pile group is the largest. At this time, the upper rechargeable extended parking space K1 is extended on the left side of the upper side parking space 1 corresponding to the leftmost charging pile in the charging pile group, and the lower rechargeable extended parking space K2 is extended on the left side of the lower side parking space 3 corresponding to the leftmost charging pile in the charging pile group.
[0043] Preferably, when the extension device 7 is in the undeployed state, the upper second branch 2102 and the lower second branch 2202 corresponding to each charging pile 2 are in the off state.
[0044] As Figures 3 to 7 shown, it can be understood that when the new energy vehicle in the leftmost upper side parking space 1 is fully charged and there are no other available parking spaces, when the extension device 7 moves linearly under the control of the controller and is in the deployed state, the controller disconnects the upper first branch 2101 and conducts the upper second branch 2102. The electricity of the charging pile 2 corresponding to the leftmost upper side parking space 1 is transmitted to the extended charging pile 8 through the upper second branch 2102, the microgrid extended bus 5 and the cable 6. The extended charging pile 8 uses its 2 charging interfaces to supply power to the new energy vehicles in the upper rechargeable extended parking space K1 and the lower rechargeable extended parking space K2 respectively, realizing the extended charging function. First, it improves the use efficiency of the microgrid charging piles. Second, it improves the timeliness of user charging, thereby enhancing the user experience. Third, it reduces queuing or congestion at the charging station. Fourth, it improves the consumption level of the microgrid distributed energy. Fifth, it increases the revenue of the microgrid.
[0045] Preferably, the power conversion module is not provided in the extended charging pile 8, which only serves as an extended charging interface for the charging pile 2.
[0046] Embodiment 2 This embodiment is an improvement based on Embodiment 1.
[0047] As Figures 6 to 9 shown, the leftmost side line 11 of the upper parking space 1, the leftmost side line 31 of the lower parking space 3, and the leftmost side line 71 of the expansion device 7. When the expansion device 7 is in the non-expanded state, the distance D between the leftmost side line 71 of the expansion device 7 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is less than or equal to 30 cm to improve safety.
[0048] When the expansion device 7 is in the expanded state, the distance D between the leftmost side line 71 of the expansion device 7 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is less than or equal to 320 cm to improve safety.
[0049] Preferably, when the expansion device 7 is in the expanded state, the distance D between the leftmost side line 71 of the expansion device 7 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is 300 cm to improve safety.
[0050] Preferably, when the expansion device 7 is in the expanded state, the distance D between the leftmost side line 71 of the expansion device 7 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is 280 cm to improve safety.
[0051] Preferably, when the expansion device 7 is in the expanded state, the distance D between the leftmost side line 71 of the expansion device 7 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is 260 cm to improve safety.
[0052] Embodiment 3 This embodiment is an improvement based on Embodiment 1 or 2.
[0053] As an embodiment, the expansion device 7 is specifically arranged, but not restrictively.
[0054] The expansion device 7 is a retractable door. A bracket is fixed between the middle two rows of columns of the retractable door, and the extended charging pile 8 is fixed to the bracket. When the retractable door is driven by a controller to perform a linear motion, the extended charging pile 8 moves along with it to charge new energy vehicles in the upper rechargeable extended parking space K1 and the lower rechargeable extended parking space K2.
[0055] Preferably, when the expansion device 7 is in the deployed state, the distance between the leftmost side line of the extended charging pile 8 and the leftmost side line 11 of the upper parking space 1 or the leftmost side line 31 of the lower parking space 3 is less than or equal to 250 cm to improve safety.
[0056] Preferably, the extended charging pile 8 is suspended by a bracket, and the distance between the extended charging pile 8 and the ground is greater than or equal to 30 cm. On the one hand, the insulation level is improved, and on the other hand, the heat dissipation level is improved.
[0057] Preferably, the retractable door is made of stainless steel, and the housings of the extended charging pile 8 and each charging pile 2 are connected to the fixed side struts of the retractable door through soft copper wires, so as to increase the heat dissipation area of the extended charging pile 8 and each charging pile 2 by using the retractable door and improve the heat dissipation level of the extended charging pile 8 and each charging pile 2.
[0058] Preferably, warning lights are installed on at least one strut of the retractable door to improve the warning effect.
[0059] Preferably, projection lights are arranged on at least one strut of the retractable door to project the rechargeable extended parking space K1 and the lower rechargeable extended parking space K2 onto the ground on both sides of the retractable door.
[0060] Embodiment Four This embodiment is an improvement based on Embodiment One or Two or Three.
[0061] In this embodiment, a power conversion module is arranged in the extended charging pile 8. For example, a DC / DC conversion module is arranged in the extended charging pile 8. When any charging pile 2 is damaged, the controller directly controls the DC / DC conversion module in the extended charging pile 8 to charge new energy vehicles in the upper rechargeable extended parking space K1 and the lower rechargeable extended parking space K2, improving the power supply reliability of the microgrid.
[0062] Embodiment Five This embodiment is an improvement based on Embodiment One or Two or Three or Four.
[0063] In this embodiment, expansion devices 7 and extended charging piles 8 are arranged on both sides of the charging pile group, and the structures of the expansion devices 7 and extended charging piles 8 on both sides are the same.
[0064] Embodiment Six This embodiment is an improvement based on Embodiment One or Two or Three or Four or Five.
[0065] A control method for charging new energy vehicles based on a microgrid includes the following steps: Step S1, when the new energy vehicle in any parking space is fully charged and there are no other vacant parking spaces, the controller sends information to the user of the new energy vehicle; Step S2, if the user does not feedback the information of moving the vehicle within the preset time; Step S21, the controller controls the expansion device to perform a linear motion to the unfolded state; the controller disconnects the upper first branch or the lower first branch corresponding to the new energy vehicle, and conducts the upper second branch or the lower second branch. The electricity on the charging pile corresponding to the new energy vehicle passes through the upper second branch or the lower second branch, and is transmitted to the extended charging pile through the microgrid extended bus and the cable. The extended charging pile uses its two charging interfaces to supply the vehicles to be charged in the upper rechargeable extended parking space and / or the lower rechargeable extended parking space respectively; Step S3, if the user feedbacks the information of moving the vehicle within the preset time, but the vehicle still does not move after the moving time feedback by the user, return to Step S21.
[0066] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.
[0067] It should be noted that the serial numbers of the embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.
[0068] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, and any combination of the embodiments or solutions can be included in the patent protection scope of the present invention by the same token.
Claims
1. A new energy vehicle charging control system based on a microgrid, characterized in that it includes multiple horizontally arranged charging piles and a controller, and multiple charging piles are all connected to the DC bus of the microgrid, and the controller is arranged in the box of any charging pile; One parking space is arranged on the upper side and the lower side of each charging pile, and each charging pile has 2 charging circuits to supply the corresponding upper side parking space and lower side parking space respectively; The upper charging circuit of each charging pile branches into an upper first branch and an upper second branch, and the lower charging circuit of each charging pile branches into a lower first branch and a lower second branch. The upper first branch supplies the corresponding upper side parking space, and the lower first branch supplies the corresponding lower side parking space; the upper second branch and the lower second branch are respectively connected to the extended bus of the microgrid; The DC bus of the microgrid and the extended bus of the microgrid are connected in parallel; An extended charging pile is arranged on the left side of the charging pile group composed of multiple charging piles. The extended charging pile is fixed on the extended device, and the extended device can be controlled by the controller to move linearly along the arrangement direction of the multiple charging piles and has two states: an unfolded state and a deployed state; The extended charging pile is connected to the extended bus of the microgrid through a cable.
2. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that Switching devices are respectively arranged in the upper first branch, the upper second branch, the lower first branch and the lower second branch, and the switching devices are controlled by the controller to control the conduction and disconnection of the corresponding branches.
3. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that, When the extended device is in the unfolded state, the distance between the extended charging pile and the left side of the charging pile group is the smallest; when the extended device is in the deployed state, the distance between the extended charging pile and the left side of the charging pile group is the largest.
4. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that When the extended device is in the deployed state, one rechargeable extended parking space is extended on the upper side and the lower side of the extended charging pile respectively; the extended charging pile has 2 charging interfaces to supply the upper rechargeable extended parking space and the lower rechargeable extended parking space respectively.
5. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that, When the extended device is in the unfolded state, the upper second branch and the lower second branch corresponding to each charging pile are both in the disconnected state.
6. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that When the extended device is in the unfolded state, the distance between the leftmost side line of the extended device and the leftmost side line of the upper side parking space or the leftmost side line of the lower side parking space is less than or equal to 30 cm.
7. The new energy vehicle charging control system based on a microgrid according to claim 1, wherein When the extended device is in the deployed state, the distance between the leftmost side line of the extended charging pile and the leftmost side line of the upper side parking space or the leftmost side line of the lower side parking space is less than or equal to 250 cm.
8. The new energy vehicle charging control system based on a microgrid according to claim 1, characterized in that, The extended device is a retractable door. A bracket is fixed between the middle two rows of columns of the retractable door, and the extended charging pile is fixed on the bracket.
9. The new energy vehicle charging control system based on a microgrid according to claim 8, characterized in that, The retractable door is made of stainless steel, and the extended charging pile and the shells of each charging pile are both connected to the fixed side strut of the retractable door through soft copper wires.
10. A control method for a new energy vehicle charging control system based on a microgrid according to any one of claims 1-9, comprising the following steps: Step S1, when the new energy vehicle in any parking space is fully charged and there is no other vacant parking space, the controller sends information to the user of the new energy vehicle; Step S2, if the user does not feedback the information of moving the vehicle within the preset time; Step S21: The controller controls the expansion device to perform a linear motion to the deployed state; the controller disconnects the upper first branch or the lower first branch corresponding to the new energy vehicle, and conducts the upper second branch or the lower second branch. The electricity on the charging pile corresponding to the new energy vehicle passes through the upper second branch or the lower second branch, and is transmitted to the extended charging pile through the microgrid expansion busbar and the cable. The extended charging pile uses its two charging interfaces to supply the vehicles to be charged in the upper rechargeable extended parking spaces and / or the lower rechargeable extended parking spaces respectively; Step S3: If the user feedbacks the vehicle moving information within the preset time, and the controller monitors that the vehicle has not been moved after the vehicle moving time feedback by the user, return to Step S21.
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