A distributed photovoltaic storage and charging microgrid intelligent system

Abstract

The present invention relates to a distributed photovoltaic storage and charging microgrid intelligent system applied in the field of power supply. The photovoltaic storage and charging system is used to supply power to charging piles during the day, effectively reducing the daytime operating load of the public power grid system, and at the same time, the health status and remaining power of the energy storage battery pack are monitored in real time. When the health status is not good or the remaining power is insufficient, the dual-vehicle battery swap operation is used to swap the battery of the vehicle that has not been picked up after the time limit with the vehicle that is being charged. On the one hand, without increasing the load of the public power grid system, the power supply failure problem of the energy storage battery pack is effectively alleviated, and the battery swap operation does not need to pass through the energy storage battery pack, and is not easy to increase its operating load. On the other hand, the battery swap operation can be used as a penalty for the vehicle that has not been picked up after the time limit, thereby increasing the enthusiasm of users to pick up the vehicle in time later, thereby improving the utilization rate of the pile resource. In addition, the setting of the battery swap operation allows users to select multiple charging piles for use in a dispersed manner, thereby improving the load balance of each energy storage battery pack.

Description

Technical Field

[0001] The present invention relates to the field of power supply, and in particular to a distributed photovoltaic storage and charging microgrid intelligent system. Background Art

[0002] The integrated storage and charging system is an intelligent energy system that integrates photovoltaic power generation, energy storage batteries and electric vehicle charging functions. It achieves efficient utilization of clean energy, grid load optimization and reliable supply of charging services through multi-energy coordination and intelligent control.

[0003] For example, the specification of Chinese patent CN107221944B discloses an integrated photovoltaic, storage and charging system, which enables electric vehicles to charge when electricity prices are low and sell electricity when electricity prices are high. This encourages electric vehicle owners to charge their electric vehicles during low electricity consumption periods and sell electricity to the integrated photovoltaic, storage and charging system during peak electricity consumption periods, allowing the integrated photovoltaic, storage and charging system to charge other electric vehicles, thereby alleviating the impact of centralized charging of electric vehicles on the public power grid during peak electricity consumption periods. However, the above technology will cause vehicles to frequently charge during low electricity consumption periods and frequently sell electricity during peak electricity consumption periods. This profit-making behavior will cause a shortage of charging piles, whether during low electricity consumption periods or peak electricity consumption periods, making it difficult to provide charging piles and charging operations for vehicles that really need them.

[0004] For example, the specification of Chinese patent CN115800407B discloses a low-carbon microgrid system with integrated photovoltaic storage and charging. The intelligent control module intelligently controls the power regulation of the photovoltaic regulation module, the current conversion control module, and the energy storage control module to complete the power supply control of the new energy and distribution network modules. At the same time, the intelligent control module controls the distribution control module according to the status of the energy storage control module to realize the mutual complementary discharge control of the charging pile system and the photovoltaic regulation module.

[0005] Although existing technologies have reduced the load on the distribution network through photovoltaic storage and charging technology, when photovoltaic power generation is insufficient or there is a power supply failure in the energy storage module, power supply still mainly relies on the power grid, and the distribution network still has a large load. Summary of the Invention

[0006] In view of the above-mentioned existing technologies, the technical problem to be solved by the present invention is that although the existing technologies reduce the load on the distribution network through the photovoltaic storage and charging system, when photovoltaic power generation is insufficient or there is a power supply failure in the energy storage module, the power supply still mainly relies on the power grid, and the distribution network still has a large load.

[0007] To solve the above problems, the present invention provides a distributed photovoltaic storage and charging microgrid intelligent system, including a photovoltaic storage and charging system and a power consumption end. The photovoltaic storage and charging system includes an energy storage module, a power monitoring module and a health monitoring module. The energy storage module includes multiple energy storage battery packs, and the power consumption end includes multiple multi-gun charging piles corresponding one to one to the energy storage battery packs.

[0008] The multi-gun charging pile includes a pile body, to which multiple charging guns are connected respectively through multiple charging cables. A dual-car charger is provided inside the pile body. The dual-car charger includes a terminal block. The outer end of the terminal block is electrically connected to multiple control switches. The control switches are electrically connected to a charger seat through wires. The ends of the multiple charging cables away from the charging guns are electrically connected to the multiple charger seats. The charger seat includes a shell. A conductive element is fixedly connected to the inside of the shell. The upper and lower ends of the shell are respectively provided with a power output side and a power input side.

[0009] The dual-car battery exchanger also includes a pair of dynamic battery exchange units, which include a slide rail and a slide seat slidably connected to the outer end of the slide rail. The outer end of the slide seat is fixedly connected to an electric push rod, and the telescopic ends of a pair of electric push rods are respectively fixedly connected to the power input end and the power output end.

[0010] As a further supplement to this application, the electricity consumption end is also connected to a public power grid system, and the solar storage and charging system also includes a photovoltaic power generation module and a power supply module. The photovoltaic power generation module is used to convert solar energy into electrical energy and transmit it to the energy storage module and power supply module respectively.

[0011] As a further supplement to the present application, a transmission line is electrically connected between the power input and the power output. The circuit composed of the power input, the power output and the transmission line is a unidirectional circuit, and the current direction is from the power input to the power output.

[0012] As a further supplement to the present application, the power-out side and the power-in side are also unidirectional circuits, the power-out side is used to output electrical energy, and the power-in side is used to receive electrical energy.

[0013] As a further supplement to the present application, an installation cavity is opened inside the pile body, a pair of slide rails are fixedly connected to the upper and lower inner walls of the installation cavity respectively, and a terminal block is fixedly connected to the side inner wall of the installation cavity.

[0014] As a further supplement to the present application, the middle area of ​​the transmission line passes through the inner wall of the installation cavity and is fixedly connected to the inside of the pile body, and the two end areas of the transmission line are in a free and relaxed state inside the installation cavity.

[0015] A distributed photovoltaic storage and charging microgrid intelligent system, the use method of which includes the following steps:

[0016] S1. During the day, when the solar-storage-charging system generates sufficient power, the power supply module supplies power to the multi-gun charging piles. When power generation is insufficient, the energy storage module supplements the power supply to the multi-gun charging piles and simultaneously monitors the discharge status of the energy storage battery pack to obtain its health status and remaining power.

[0017] S2. When it is detected that a certain energy storage battery pack Q is in a poor health state or its power level has dropped to a minimum threshold, the usage status of the corresponding multi-charger charging pile q is obtained;

[0018] S2.1. When there is a charging vehicle A and a fully charged vehicle B on a multi-charger charging station q, disconnect the energy storage battery pack Q from the charging guns a on vehicle A and b on vehicle B. The dual-vehicle power adapter inside the multi-charger charging station q connects charging guns a and b, transferring the charge from vehicle B to vehicle A until the total charge on both vehicles is the same.

[0019] S2.2. If there are other vehicles charging on multi-charger charging station q besides vehicles A and B, proceed to step S2.1 first, and then provide auxiliary power to the other vehicles on multi-charger charging station q through the public power grid system.

[0020] S2.3. When all vehicles on the multi-charger charging station q are charging, auxiliary power supply is provided to all vehicles on the multi-charger charging station q through the public power grid system;

[0021] S3. In any of the following situations: insufficient photovoltaic power generation, poor health of the energy storage battery pack Q, or the charge level of the energy storage battery pack Q drops to a minimum threshold, when the electric vehicle goes to charge at the multi-charger charging station q, the user is first asked whether they agree to delay charging until nighttime.

[0022] When the user agrees, after connecting the vehicle to the multi-gun charging pile q, the multi-gun charging pile q will temporarily stop charging the vehicle, and the user will have the right to refuse battery replacement once;

[0023] If the user disagrees, the vehicle is connected to the multi-gun charging pile q, and the multi-gun charging pile starts to supply power to the vehicle. The usage status of the multi-gun charging pile is then obtained, and one of step S2.1, step S2.2, or step S2.3 is performed according to the usage status.

[0024] S4. At night, all multi-gun charging piles are powered by the public power grid system.

[0025] As a further supplement to the present application, the method for determining the health status of the energy storage battery pack includes the following operations: in the process of the energy storage battery pack supplying power to a multi-gun charging pile, the temperature changes of the energy storage battery pack are monitored. When its temperature exceeds the set safety temperature range, it is determined that the health status of the energy storage battery pack is poor.

[0026] To sum up, the present application uses a photo-storage-charging system to supply power to charging piles during the day, effectively reducing the daytime operating load of the public power grid system. During the power supply process of the photo-storage-charging system, the health status and remaining power of the energy storage battery pack are monitored in real time. When the health status of the energy storage battery pack is poor or the remaining power is insufficient, the dual-vehicle battery exchanger is used to exchange the power of the vehicle that is fully charged but not taken out within the time limit with the vehicle that is being charged. On the one hand, without increasing the load on the public power grid system, the power supply failure problem of the energy storage battery pack is effectively reduced, and the battery exchange operation does not need to pass through the energy storage battery pack, which is not easy to increase the operating load of the energy storage battery pack. On the other hand, the battery exchange operation is used as a penalty for the vehicle that is not taken out within the time limit, which increases the enthusiasm of users to pick up the vehicle in time later, thereby improving the utilization rate of the pile resources. Due to the setting of the battery exchange operation, users will disperse and select multiple charging piles for use, so that the load of each energy storage battery pack is more balanced, reducing the occurrence of its health problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The system of the first, second and third embodiments of this application Figure 1 ;

[0028] Figure 2 The system of the first, second and third embodiments of this application Figure 2 ;

[0029] Figure 3 This is a three-dimensional diagram of a multi-gun charging pile according to the first, second, and third embodiments of the present application;

[0030] Figure 4 The three-dimensional dual-vehicle converter of the second and third embodiments of this application Figure 1 ;

[0031] Figure 5 This is a side structural diagram of the dual-vehicle power converter according to the second and third embodiments of this application;

[0032] Figure 6 This is a front structural diagram of the dual-vehicle power converter according to the second and third embodiments of this application;

[0033] Figure 7 The three-dimensional dual-vehicle converter of the second and third embodiments of this application Figure 2 ;

[0034] Figure 8 This is a schematic diagram of the power supply of the solar-storage-charging system in the second and third embodiments of this application;

[0035] Figure 9 This is a schematic diagram of power supply when the solar-storage-charging system fails in the second and third embodiments of this application;

[0036] Figure 10This is a usage status diagram of the power-consuming end of the second and third implementation modes of this application.

[0037] Description of the numbers in the figure:

[0038] 1 pile body, 101 installation cavity, 2 charging cable, 3 terminal board, 4 control switch, 5 battery replacement seat, 51 shell, 5101 power output side, 5102 power input side, 52 conductive element, 6 slide rail, 7 slide seat, 8 electric push rod, 91 power input end, 92 power output end, 10 transmission line. DETAILED DESCRIPTION

[0039] The following describes three implementation methods of the present application in detail with reference to the accompanying drawings.

[0040] The first implementation method:

[0041] The present invention provides a distributed photovoltaic storage and charging microgrid intelligent system, please refer to Figure 1 and Figure 2 , including a photovoltaic storage and charging system and a power consumption end. The photovoltaic storage and charging system includes an energy storage module, a power monitoring module and a health monitoring module. The energy storage module includes multiple energy storage battery packs, and the power consumption end includes multiple multi-gun charging piles corresponding one to one with the energy storage battery packs. This application uses multiple independently set energy storage battery packs to supply power to different loads (i.e., multi-gun charging piles) respectively, so that when a single energy storage battery pack fails, it is not easy to affect the overall photovoltaic power supply status.

[0042] The power consumption end is also connected to the public power grid system. The solar storage and charging system also includes a photovoltaic power generation module and a power supply module. The photovoltaic power generation module is used to convert solar energy into electrical energy and transmit it to the energy storage module and the power supply module respectively. Under normal circumstances, during the day, solar energy is mainly converted into electrical energy through the solar storage and charging system to power the multi-gun charging piles. The excess electrical energy is stored in the energy storage module. This can effectively reduce the daytime operating load of the public power grid system and improve the operating stability of the public power grid. At night, since the solar storage and charging system is difficult to generate electricity efficiently, and there are fewer electrical equipment and electricity consumption activities at night, the public power grid is used to power the multi-gun charging piles at night.

[0043] The power monitoring module is used to monitor the remaining power of the energy storage module. When the photovoltaic power generation is insufficient and the remaining power of the energy storage module is also insufficient, it will promptly switch to the public power grid system to power the multi-gun charging pile. The health monitoring module is electrically connected to a temperature sensor that monitors the temperature of the energy storage module. When it is detected that the energy storage module is overheating, the use of the energy storage module will be suspended and the power supply mode will be switched to the public power grid system.

[0044] Second implementation method:

[0045] See also Figure 3This embodiment adds the following content on the basis of the first embodiment: the multi-gun charging pile includes a pile body 1, and the pile body 1 is connected to multiple charging guns through multiple charging lines 2, combined with Figure 2 and Figure 4 As shown, a dual-car converter is provided inside the pile body 1, and the dual-car converter is electrically connected to the controller inside the pile body 1, so that the controller can control various electrical components of the dual-car converter. The dual-car converter includes a terminal board 3, and the outer end of the terminal board 3 is electrically connected to a plurality of control switches 4, and the control switch 4 is electrically connected to a converter seat 5 through a wire. The ends of the plurality of charging cables 2 away from the charging gun are fixedly passed through the interior of the pile body 1 and are electrically connected to the plurality of converter seats 5 respectively, combined with Figure 5 As shown, the battery exchange seat 5 includes a shell 51, and a conductive element 52 is fixedly connected to the interior of the shell 51. The end of the charging line 2 is connected to the conductive element 52. The upper and lower ends of the shell 51 are respectively provided with an output side 5101 and an input side 5102. The dual-vehicle battery exchanger also includes a pair of dynamic battery exchange units. The dynamic battery exchange unit includes a slide rail 6 and a slide seat 7 slidably connected to the outer end of the slide rail 6. The outer end of the slide seat 7 is fixedly connected to an electric push rod 8. The telescopic ends of a pair of electric push rods 8 are respectively fixedly connected to the input end 91 and the output end 92.

[0046] The public power grid and the energy storage battery pack are both electrically connected to the terminal board 3, and transmit electrical energy to the terminal board 3 at different time periods. Under normal circumstances, the charging line 2 transmits electrical energy to each charging line 2 respectively, so that the charging gun charges the vehicle.

[0047] The power input terminal 91 and the power output terminal 92 are electrically connected with a transmission line 10. The circuit formed by the power input terminal 91, the power output terminal 92 and the transmission line 10 is a unidirectional circuit, and the current direction is from the power input terminal 91 to the power output terminal 92. The power output side 5101 and the power input side 5102 are also unidirectional circuits. The power output side 5101 is used to output electric energy, and the power input side 5102 is used to receive electric energy. The horizontal position of the power input terminal 91 and the power output terminal 92 is achieved by moving the slide 7 on the slide rail 6. The centers of the power input terminal 91, the power output terminal 92, the power input side 5102 and the power input side 5102 are located on the same vertical plane. When the power input terminal 91 is connected to a power output side 5101 and the power output terminal 92 is connected to a power input side 5102, the current will be transmitted in sequence along the path of the power output side 5101, the power input terminal 91, the transmission line 10, the power output terminal 92 and the power input side 5102. In this way, unidirectional current transmission can be achieved between any pair of charging guns.

[0048] See also Figure 5 and Figure 6An installation cavity 101 is provided inside the pile body 1, a pair of slide rails 6 are fixedly connected to the upper and lower inner walls of the installation cavity 101 respectively, and the terminal block 3 is fixedly connected to the side inner wall of the installation cavity 101, so that the entire dual-car exchanger is stably installed inside the pile body 1. The middle area of ​​the transmission line 10 passes through the side inner wall of the installation cavity 101 and is fixedly connected to the inside of the pile body 1. The two end areas of the transmission line 10 are in a free and relaxed state inside the installation cavity 101. The purpose of reserving some slack areas is to enable the transmission line 10 to adapt to the lateral movement process of the slide 7, the electric push rod 8, the input end 91 and the output end 92.

[0049] A distributed photovoltaic storage and charging microgrid intelligent system, the use method of which includes the following steps:

[0050] S1. During the day, when the solar energy storage and charging system generates sufficient power, the power supply module supplies power to the multi-gun charging piles. When the power generation is insufficient, the energy storage module supplements the power supply to the multi-gun charging piles. Figure 8 As shown, the discharge status of the energy storage battery pack is monitored at the same time to obtain its health status and remaining power;

[0051] S2. When it is detected that a certain energy storage battery pack Q is in a poor health state or its power level has dropped to a minimum threshold, the usage status of the corresponding multi-charger charging pile q is obtained;

[0052] S2.1. When there is a charging vehicle A and a fully charged vehicle B on a multi-gun charging pile q at the same time, the energy storage battery pack Q is disconnected from the power supply to the charging gun a on vehicle A and the charging gun b on vehicle B. The dual-vehicle exchanger inside the multi-gun charging pile q is used to connect the charging gun a and the charging gun b, and the power inside vehicle B is transferred to vehicle A. Figure 9 As shown, until the total power of the two is the same, stop swapping between the two;

[0053] S2.2. If there are other vehicles charging on multi-charger charging station q besides vehicles A and B, proceed to step S2.1 first, and then provide auxiliary power to the other vehicles on multi-charger charging station q through the public power grid system.

[0054] S2.3. When all vehicles on the multi-charger charging station q are charging, auxiliary power supply is provided to all vehicles on the multi-charger charging station q through the public power grid system;

[0055] S3. In any of the following situations: insufficient photovoltaic power generation, poor health of the energy storage battery pack Q, or the charge level of the energy storage battery pack Q drops to a minimum threshold, when the electric vehicle goes to charge at the multi-charger charging station q, the user is first asked whether they agree to delay charging until nighttime.

[0056] When the user agrees, after connecting the vehicle to the multi-gun charging pile q, the multi-gun charging pile q will temporarily stop charging the vehicle;

[0057] If the user disagrees, the vehicle is connected to the multi-gun charging pile q, and the multi-gun charging pile starts to supply power to the vehicle. The usage status of the multi-gun charging pile is then obtained, and one of step S2.1, step S2.2, or step S2.3 is performed according to the usage status.

[0058] S4. At night, all multi-gun charging piles are powered by the public power grid system.

[0059] In step S2.1, for vehicle B that is fully charged but has not been picked up within the time limit, the long-term occupation of the parking space increases the impact of insufficient parking space resources. Therefore, through the battery replacement operation in step S2.1, on the one hand, the above operation can be used as a punishment for vehicle B's failure to pick up the vehicle within the time limit, thereby increasing the user's enthusiasm for timely pickup of the vehicle later. On the other hand, by using vehicle B to charge vehicle A instead of the energy storage battery pack that is in poor health or has insufficient power, the above-mentioned problems of the energy storage battery pack can be effectively alleviated, and the load on the public power grid system can also be reduced. Combined with the operation of the public power grid system to provide auxiliary power to other vehicles, the energy storage battery pack that is in poor health or has insufficient power can be suspended, effectively restored to its own state or wait for later charging.

[0060] The dual-vehicle battery exchange method for vehicle A and vehicle B is: Figure 7 As shown, the control switch 4 corresponding to vehicle A and vehicle B is started to disconnect the battery exchange seat 5 from the terminal board 3, that is, the connection between the charging guns on both vehicles A and B and the terminal board 3 is disconnected, and then the slide 7 is started to drive the input end 91 and the output end 92 to move, so that the input end 91 moves to the upper side of the shell 51 corresponding to vehicle B, and the output end 92 moves to the lower side of the shell 51 corresponding to vehicle A, and then the electric push rod 8 is started to drive the input end 91 and the output end 92 to be inserted into the corresponding output side 5101 and input side 5102 respectively, and the input end 91 and the output end are connected. The ends 92 are respectively in contact with the conductive elements 52 in a pair of shells 51 to achieve circuit connectivity, so that the electricity in vehicle B reaches the corresponding conductive element 52 through the charging gun and the charging line 2, and is then transmitted to the corresponding conductive element 52 of vehicle A through the power input end 91, the transmission line 10, and the power output end 92, and is finally input into vehicle A through the charging line 2 and the charging gun, thereby realizing the battery replacement between vehicle B and vehicle A, effectively alleviating the burden on the energy storage battery pack that is in poor health or has insufficient power, and this battery replacement does not need to pass through the energy storage battery pack, and is not easy to increase the operating load of the energy storage battery pack.

[0061] In step S3, when photovoltaic power generation is insufficient, the energy storage battery group Q is in poor health, or the energy storage battery group Q is low on power, it indicates that the photovoltaic storage and charging system is unable to supply power to the multi-gun charging piles and vehicles. At this time, by delaying the vehicle operation until nighttime, the load of the photovoltaic storage and charging system can be effectively reduced, and it is not easy to increase the daytime load of the public power grid system, which has positive significance for the safety of the photovoltaic storage and charging system and the stability of the daytime operation of the public power grid system.

[0062] In addition, due to the setting of the battery replacement operation in step S2.1, when selecting a parking space, the user will give priority to unused multi-gun charging piles or multi-gun charging piles with fewer vehicles being charged, such as Figure 10 As shown, this can make the number of vehicles on each multi-gun charging pile more balanced, and thus make the load of each energy storage battery group more balanced, and it is less likely to have the uneven phenomenon of one energy storage battery group being overloaded and another energy storage battery group being underloaded, and it is less likely to cause individual energy storage battery groups to be overloaded and cause their own health problems and insufficient power problems.

[0063] The method for determining the health status of the energy storage battery pack includes the following operations: in the process of the energy storage battery pack supplying power to the multi-gun charging pile, monitoring the temperature change of the energy storage battery pack is implemented. When its temperature exceeds the set safe temperature range, the energy storage battery pack is determined to be in poor health. Generally speaking, a matching heat dissipation module is provided in the solar storage charging system to cool the energy storage battery pack. Therefore, under normal circumstances, the operating temperature of the energy storage battery pack will be within a fluctuating safe range, that is, the safe temperature range set in this application. When the operating temperature of the energy storage battery pack during discharge exceeds this temperature range, it indicates that the energy storage battery pack is at risk of thermal runaway. At this time, it is determined that the energy storage battery pack is in poor health, and the battery replacement or auxiliary power supply of the public grid system in step S2 is performed (in actual practice, the basis for determining the health status of the energy storage battery pack includes but is not limited to temperature monitoring. For example, voltage monitoring, current monitoring, etc. can also be used. When the operating voltage exceeds the set maximum voltage value or the operating current exceeds the set maximum current value, it can also be determined that the energy storage battery pack is in poor health);

[0064] In addition, the solar-storage-charging system also includes an early warning module connected to the health monitoring module. If a storage battery pack is determined to be in poor health multiple times (for example, three times), the early warning module will issue a fault warning, reminding personnel to promptly inspect the storage battery pack, thereby reducing the risk of fire caused by thermal runaway.

[0065] Supplementary explanation: In step S2, after passing step S2.1, step S2.2 or step S2.3, the energy storage battery pack is in a no-load stopped state. Case 1: When the energy storage battery pack stops running due to insufficient power, there is no time limit for stopping until it is fully charged again and can run again. During this period, the vehicles connected to the corresponding multi-gun charging piles are powered by the public power grid system. Case 2: When the energy storage battery pack stops running due to poor health, it can run again after T time (such as 2 hours), and after T time, vehicle A and vehicle B still maintain the battery swap operation in step S2.1. After the total power of the two is the same, the battery swap is stopped. At this time, the energy storage battery pack continues to charge vehicle A, and vehicle B remains in an unfull state. The vehicles assisted by the public power grid system and the newly connected vehicles are directly powered by the energy storage battery pack.

[0066] When the user connects the vehicle to the multi-gun charging pile, the user's mobile terminal will be wirelessly connected to the corresponding multi-gun charging pile. When the vehicle is fully charged, a prompt message will be sent to the mobile terminal to remind the user to pick up the vehicle in time, and a set pick-up time will be given, such as within 1 hour. If the vehicle is not picked up within 1 hour, the vehicle will be determined to be a timed vehicle.

[0067] The third implementation method:

[0068] This embodiment is based on the first embodiment. When the user chooses to agree to delay charging until nighttime in step S3, the user will have the right to refuse battery replacement once.

[0069] When the user charges the vehicle next time, he can check the item of refusing battery replacement online by connecting the mobile terminal to the multi-gun charging pile. In this way, during the charging process, even if the vehicle is fully charged but not taken out within the time limit, the dual-vehicle battery replacement device will not select this vehicle as the battery replacement object (i.e. vehicle B), so that it can remain fully charged and convenient for this use. Through the above-mentioned reward operation, the user's enthusiasm for agreeing to night charging in step S3 can be increased, thereby effectively dealing with the situation of insufficient power supply or poor health of the solar storage and charging system, and it is not easy to increase the daytime load of the public power grid system.

[0070] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A distributed solar-storage-charging microgrid intelligent system, characterized by: It includes a light storage and charging system and a power end. The light storage and charging system includes an energy storage module, a power monitoring module and a health monitoring module. The energy storage module includes multiple energy storage battery packs, and the power end includes multiple multi-gun charging piles corresponding to the energy storage battery packs. The multi-gun charging pile comprises a pile body (1), wherein the pile body (1) is connected to a plurality of charging guns through a plurality of charging cables (2), a dual-car charger is provided inside the pile body (1), and the dual-car charger comprises a terminal board (3), the outer end of the terminal board (3) is electrically connected to a plurality of control switches (4), the control switches (4) are electrically connected to a charger seat (5) through a wire, the ends of the plurality of charging cables (2) are electrically connected to the plurality of charger seats (5), the charger seat (5) comprises a shell (51), a conductive element (52) is fixedly connected to the interior of the shell (51), and the upper and lower ends of the shell (51) are respectively provided with a power output side (5101) and a power input side (5102); The dual-car power converter further comprises a pair of dynamic power exchange units, the dynamic power exchange units comprising a slide rail (6) and a slide seat (7) slidably connected to the outer end of the slide rail (6), the outer end of the slide seat (7) is fixedly connected to an electric push rod (8), and the telescopic ends of the pair of electric push rods (8) are respectively fixedly connected to an input power end (91) and an output power end (92); A transmission line (10) is electrically connected between the power input end (91) and the power output end (92). The circuit formed by the power input end (91), the power output end (92) and the transmission line (10) is a unidirectional circuit, and the current direction is from the power input end (91) to the power output end (92). The power output side (5101) and the power input side (5102) are also unidirectional circuits. The power output side (5101) is used to output electric energy, and the power input side (5102) is used to receive electric energy.

2. A distributed solar-storage-charging microgrid intelligent system according to claim 1, characterized in that: The power consumption end is also connected to a public power grid system. The light storage and charging system also includes a photovoltaic power generation module and a power supply module. The photovoltaic power generation module is used to convert solar energy into electrical energy and transmit it to the energy storage module and the power supply module respectively.

3. The distributed solar-storage-charging microgrid intelligent system according to claim 1 is characterized by: An installation cavity (101) is provided inside the pile body (1), a pair of slide rails (6) are fixedly connected to the upper and lower inner walls of the installation cavity (101), and the terminal board (3) is fixedly connected to the side inner wall of the installation cavity (101).

4. A distributed solar-storage-charging microgrid intelligent system according to claim 3, characterized in that: The middle region of the transmission line (10) passes through the inner wall of the installation cavity (101) and is fixedly connected to the interior of the pile body (1), and the two end regions of the transmission line (10) are located inside the installation cavity (101) in a free and relaxed state.

5. The distributed solar-storage-charging microgrid intelligent system according to claim 2 is characterized by: The method of use includes the following steps: S1. During the day, when the solar-storage-charging system generates sufficient power, the power supply module supplies power to the multi-gun charging piles. When power generation is insufficient, the energy storage module supplements the power supply to the multi-gun charging piles and simultaneously monitors the discharge status of the energy storage battery pack to obtain its health status and remaining power. S2. When it is detected that a certain energy storage battery pack Q is in a poor health state or its power level has dropped to a minimum threshold, the usage status of the corresponding multi-charger charging pile q is obtained; S2.

1. When there is a charging vehicle A and a fully charged vehicle B on a multi-charger charging station q, disconnect the energy storage battery pack Q from the charging guns a on vehicle A and b on vehicle B. The dual-vehicle power adapter inside the multi-charger charging station q connects charging guns a and b, transferring the charge from vehicle B to vehicle A until the total charge on both vehicles is the same. S2.

2. If there are other vehicles charging on multi-charger charging station q besides vehicles A and B, proceed to step S2.1 first, and then provide auxiliary power to the other vehicles on multi-charger charging station q through the public power grid system. S2.

3. When all vehicles on the multi-charger charging station q are charging, auxiliary power supply is provided to all vehicles on the multi-charger charging station q through the public power grid system; S3. In any of the following situations: insufficient photovoltaic power generation, poor health of the energy storage battery pack Q, or the charge level of the energy storage battery pack Q drops to a minimum threshold, when the electric vehicle goes to charge at the multi-charger charging station q, the user is first asked whether they agree to delay charging until nighttime. When the user agrees, after connecting the vehicle to the multi-gun charging pile q, the multi-gun charging pile q will temporarily stop charging the vehicle, and the user will have the right to refuse battery replacement once; If the user disagrees, the vehicle is connected to the multi-gun charging pile q, and the multi-gun charging pile starts to supply power to the vehicle. The usage status of the multi-gun charging pile is then obtained, and one of step S2.1, step S2.2, or step S2.3 is performed according to the usage status. S4. At night, all multi-gun charging piles are powered by the public power grid system.

6. A distributed solar-storage-charging microgrid intelligent system according to claim 5, characterized in that: The method for judging the health status of the energy storage battery pack includes the following operations: when the energy storage battery pack supplies power to a multi-gun charging pile, the temperature change of the energy storage battery pack is monitored. When its temperature exceeds the set safe temperature range, it is determined that the health status of the energy storage battery pack is poor.

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