Distributed optical storage and charging micro-grid intelligent system

Abstract

The invention relates to a distributed optical storage and charging micro-grid intelligent system applied to the field of power supply, and the system carries out the daytime power supply of a charging pile through an optical storage and charging system, effectively reduces the daytime operation load of a public power grid system, and carries out the real-time monitoring of the health state and residual electric quantity of an energy storage battery pack. When the health state is poor or the residual electric quantity is insufficient, the double-vehicle converter is used for carrying out power conversion operation on the overtime untaken vehicle and the charging vehicle, on one hand, on the basis of not increasing the load of the public power grid system, the power supply fault problem of the energy storage battery pack is effectively relieved, and the power conversion operation does not need to pass through the energy storage battery pack; on the other hand, the battery replacement operation can serve as punishment of overtime non-taking of the vehicle, the enthusiasm of the user for taking the vehicle in time in the later period is improved, the pile position resource utilization rate is accordingly improved, the user can select the multi-gun charging pile in a scattered mode for use due to the arrangement of the battery replacement operation, and then the load balance of all the energy storage battery packs is improved.

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 use 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, prompting electric car 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 concentrated charging of electric vehicles on the public power grid during peak electricity consumption periods; however, the above technology will cause vehicles to charge frequently during low electricity consumption periods and sell electricity frequently during peak electricity consumption periods, which is a profit-making behavior. Whether it is during low electricity consumption periods or peak electricity consumption periods, it will cause a shortage of charging pile sources, making it difficult to provide charging pile sources 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 power 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 state 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 the existing technology reduces 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, it still mainly relies on the power grid for power supply, and the distribution network is still under a large load. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that although the prior art reduces 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, it still mainly relies on the power grid for power supply, and the distribution network is still under a large load.

[0007] In order 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, wherein 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 a plurality of energy storage battery packs, and the power consumption end includes a plurality of multi-gun charging piles corresponding to the energy storage battery packs one by one; The multi-gun charging pile includes a pile body. Multiple charging guns are respectively connected to the pile body through multiple charging cables. A dual-vehicle electricity exchanger is arranged inside the pile body. The dual-vehicle electricity exchanger includes a wiring board. The outer ends of the wiring board are electrically connected to multiple control switches. The control switches are electrically connected to electricity exchange seats through wires. One ends of the multiple charging cables far from the charging guns are respectively electrically connected to the multiple electricity exchange seats. The electricity exchange seat includes a housing. A conductive element is fixedly connected inside the housing. An electricity output side and an electricity input side are respectively opened at the upper and lower ends of the housing; The dual-vehicle electricity exchanger further includes a pair of dynamic electricity exchange units. The dynamic electricity exchange unit includes a slide rail and a slide seat slidably connected to the outer end of the slide rail. An electric push rod is fixedly connected to the outer end of the slide seat. The telescopic ends of the pair of electric push rods are respectively fixedly connected with an electricity input end and an electricity output end.

[0008] As a further supplement to this application, the power consumption end is also connected to the public power grid system. The photovoltaic energy storage charging system further includes a photovoltaic power generation module and a power supply module. The photovoltaic power generation module is used to convert solar energy into electric energy and respectively deliver it to the energy storage module and the power supply module.

[0009] As a further supplement to this application, a power transmission line is electrically connected between the electricity input end and the electricity output end. The circuit formed by the electricity input end, the electricity output end and the power transmission line is a one-way circuit, and the current direction is from the electricity input end to the electricity output end direction.

[0010] As a further supplement to this application, the electricity output side and the electricity input side are also one-way circuits. The electricity output side is used to output electric energy, and the electricity input side is used to receive electric energy.

[0011] As a further supplement to this application, an installation cavity is opened inside the pile body. A pair of slide rails are respectively fixedly connected to the upper and lower inner walls of the installation cavity. The wiring board is fixedly connected to the side inner wall of the installation cavity.

[0012] As a further supplement to this application, the middle area of the power transmission line penetrates through the side inner wall of the installation cavity and is fixedly connected to the inside of the pile body. The two end areas of the power transmission line are in a free and slack state inside the installation cavity.

[0013] A distributed photovoltaic energy storage charging microgrid intelligent system, its usage method includes the following steps: S1. During the day, when the photovoltaic energy storage charging system generates sufficient electricity, the power supply module supplies power to the multi-gun charging pile. When the power generation is insufficient, the energy storage module supplies supplementary power to the multi-gun charging pile. At the same time, monitor the discharge state of the energy storage battery pack to obtain its health condition and remaining power; S2. When it is monitored that either the health state of a certain energy storage battery pack Q is not good or its power drops to the lowest threshold, obtain the usage status of the corresponding multi-gun charging pile q; S2.1. When there is a vehicle A that is charging and a vehicle B that is fully charged and has not been picked up after the time limit on the multi-gun charging pile q at the same time, disconnect the power supply of the energy storage battery pack Q to the charging gun a on vehicle A and the charging gun b on vehicle B, and connect the charging gun a and the charging gun b through the two-vehicle charger inside the multi-gun charging pile q, and transfer the power inside vehicle B to vehicle A until their total power is the same; S2.2. When there are other vehicles charging on the multi-gun charging pile q in addition to vehicle A and vehicle B, first perform step S2.1, and then use the public power grid system to provide auxiliary power supply for other vehicles on the multi-gun charging pile q; S2.3. When all the vehicles on the multi-gun charging pile q are charging vehicles, use the public power grid system to provide auxiliary power supply for all the vehicles on the multi-gun charging pile q; S3. In any of the three cases where the photovoltaic power generation is insufficient, the health status of the energy storage battery pack Q is poor, or the power of the energy storage battery pack Q drops to the lowest threshold, when an electric vehicle goes to the multi-gun charging pile q for charging, first ask the user if they agree to delay charging until night; When the user agrees, after connecting the vehicle and the multi-gun charging pile q, the multi-gun charging pile q does not charge the vehicle temporarily, and the user will obtain the right to refuse battery swapping once; When the user does not agree, after connecting the vehicle and the multi-gun charging pile q, the multi-gun charging pile starts to supply power to the vehicle, and then obtains the usage status of the multi-gun charging pile, and performs one of step S2.1, step S2.2 or step S2.3 according to the usage status; S4. At night, use the public power grid system to supply power to all multi-gun charging piles.

[0014] As a further supplement to this application, the method for judging the health status of the energy storage battery pack includes the following operations: During the process of the energy storage battery pack supplying power to the multi-gun charging pile, monitor the temperature change of the energy storage battery pack, and when its temperature exceeds the set safe temperature range, determine that the health status of the energy storage battery pack is poor.

[0015] In summary, the present application uses a photovoltaic energy storage charging system to supply power to the charging pile during the day, effectively reducing the daytime operating load of the public power grid system. During the power supply process of the photovoltaic energy 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, a two-vehicle battery exchanger is used to perform a battery swapping operation between a vehicle with a full charge but an overdue pick-up and a vehicle that is currently charging. On the one hand, without increasing the load on the public power grid system, it effectively alleviates the power supply failure problem of the energy storage battery pack, and the battery swapping operation does not pass through the energy storage battery pack, making it less likely to increase the operating load of the energy storage battery pack. On the other hand, the battery swapping operation is used as a penalty for vehicles with overdue pick-ups, which improves the enthusiasm of users to pick up their vehicles in a timely manner later, thereby improving the utilization rate of pile position resources. Due to the setting of the battery swapping operation, users will disperse and select multi-gun charging piles for use, making the load on each energy storage battery pack more balanced and reducing the occurrence of health problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Systems of the first, second, and third embodiments of the present application Figure 1 ; Figure 2 Systems of the first, second, and third embodiments of the present application Figure 2 ; Figure 3 Stereogram of the multi-gun charging pile of the first, second, and third embodiments of the present application; Figure 4 Stereogram of the two-vehicle battery exchanger of the second and third embodiments of the present application Figure 1 ; Figure 5 Side structure schematic diagram of the two-vehicle battery exchanger of the second and third embodiments of the present application; Figure 6 Front structure schematic diagram of the two-vehicle battery exchanger of the second and third embodiments of the present application; Figure 7 Stereogram of the two-vehicle battery exchanger of the second and third embodiments of the present application Figure 2 ; Figure 8 Power supply schematic diagram of the photovoltaic energy storage charging system of the second and third embodiments of the present application; Figure 9 Power supply schematic diagram when the photovoltaic energy storage charging system of the second and third embodiments of the present application fails; Figure 10 Usage status diagram of the power consumption end of the second and third embodiments of the present application.

[0017] Explanation of the reference numerals in the figures: 1 pile body, 101 installation cavity, 2 charging cable, 3 junction board, 4 control switch, 5 battery swapping seat, 51 housing, 5101 power output side, 5102 power input side, 52 conductive element, 6 slide rail, 7 slide block, 8 electric push rod, 91 power input end, 92 power output end, 10 transmission line. Detailed implementation manners

[0018] The following will make a detailed description of three implementation manners of the present application with reference to the accompanying drawings.

[0019] The 1st implementation manner: The present invention provides a distributed optical storage and charging microgrid intelligent system. Please refer to Figure 1 and Figure 2 , which includes an optical storage and charging system and a power consumption end. The optical storage and charging system includes an energy storage module, a power quantity monitoring module, and a health monitoring module. The energy storage module includes a plurality of energy storage battery packs. The power consumption end includes a plurality of multi-gun charging piles corresponding to the energy storage battery packs one by one. The present application adopts a plurality of independently arranged 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 situation.

[0020] The power consumption end is also connected to a public power grid system. The optical storage and charging system further includes a photovoltaic power generation module and a power supply module. The photovoltaic power generation module is used to convert solar energy into electric energy and respectively transmit it to the energy storage module and the power supply module. Under normal circumstances, during the day, the optical storage and charging system mainly converts solar energy into electric energy to supply power to the multi-gun charging piles, and the excess electric energy is stored in the energy storage module. This can effectively reduce the daytime operation load of the public power grid system and improve the operation stability of the public power grid. At night, since it is difficult for the optical storage and charging system to generate electricity efficiently and there are fewer electrical equipment and power consumption activities at night, the public power grid is used to supply power to the multi-gun charging piles at night.

[0021] The power quantity monitoring module is used to monitor the remaining power quantity of the energy storage module. When the photovoltaic power generation is insufficient and the remaining power quantity of the energy storage module is also insufficient, it is timely switched to the public power grid system to supply power to the multi-gun charging piles. The health monitoring module is electrically connected to a temperature sensor for monitoring the temperature of the energy storage module. When it is detected that the energy storage module has an overheating situation, the use of the energy storage module is suspended and switched to the public power grid system power supply mode.

[0022] The 2nd implementation manner: Please refer to Figure 3 , on the basis of the 1st implementation manner, the following content is added: The multi-gun charging pile includes a pile body 1, and a plurality of charging guns are respectively connected to the pile body 1 through a plurality of charging cables 2. Combining Figure 2 and Figure 4As shown, a dual-vehicle charger is provided inside the pile body 1. The dual-vehicle charger is electrically connected to the controller inside the pile body 1, which facilitates the controller to control each electricity-related component of the dual-vehicle charger. The dual-vehicle charger includes a wiring board 3. Multiple control switches 4 are electrically connected to the outer end of the wiring board 3. The control switches 4 are electrically connected to the power exchange seats 5 through wires. The ends of the multiple charging cables 2 away from the charging guns fixedly penetrate through the inside of the pile body 1 and are respectively electrically connected to the multiple power exchange seats 5. Combined with Figure 5 As shown, the power exchange seat 5 includes a housing 51. A conductive element 52 is fixedly connected inside the housing 51. The end of the charging cable 2 is connected to the conductive element 52. An electricity output side 5101 and an electricity input side 5102 are respectively opened at the upper and lower ends of the housing 51. The dual-vehicle charger further includes a pair of dynamic power exchange units. The dynamic power exchange unit includes a slide rail 6 and a slide block 7 slidably connected to the outer end of the slide rail 6. An electric push rod 8 is fixedly connected to the outer end of the slide block 7. The telescopic ends of a pair of electric push rods 8 are respectively fixedly connected to an electricity input end 91 and an electricity output end 92.

[0023] Both the public power grid and the energy storage battery pack are electrically connected to the wiring board 3 and supply electric energy to the wiring board 3 at different time periods. Under normal circumstances, the charging cables 2 respectively deliver the electric energy to each charging cable 2, so that the charging gun charges the vehicle.

[0024] An electric wire 10 is electrically connected between the electricity input end 91 and the electricity output end 92. The circuit formed by the electricity input end 91, the electricity output end 92 and the electric wire 10 is a one-way circuit, and the current direction is from the electricity input end 91 to the electricity output end 92. The electricity output side 5101 and the electricity input side 5102 are also one-way circuits. The electricity output side 5101 is used to output electric energy, and the electricity input side 5102 is used to receive electric energy. By moving the slide block 7 on the slide rail 6, the horizontal positions of the electricity input end 91 and the electricity output end 92 are adjusted. The central positions of the electricity input end 91, the electricity output end 92, the electricity input side 5102 and the electricity input side 5102 are located in the same vertical plane. When the electricity input end 91 is connected to a certain electricity output side 5101 and the electricity output end 92 is connected to a certain electricity input side 5102, the current will sequentially transmit along the path of the electricity output side 5101, the electricity input end 91, the electric wire 10, the electricity output end 92 and the electricity input side 5102, so as to realize the one-way transmission of current between any pair of charging guns.

[0025] Please refer to Figure 5 and Figure 6, an installation cavity 101 is provided inside the pile body 1, a pair of slide rails 6 are respectively fixedly connected to the upper and lower inner walls of the installation cavity 101, and a wiring board 3 is fixedly connected to the side inner wall of the installation cavity 101, realizing the stable installation of the entire double-vehicle charger inside the pile body 1. The middle region of the power transmission line 10 penetrates the side inner wall of the installation cavity 101 and is fixedly connected to the inside of the pile body 1. The two end regions of the power transmission line 10 are in a free and relaxed state inside the installation cavity 101. The purpose of reserving a part of the relaxed region is to enable the power transmission line 10 to adapt to the lateral movement process of the slide seat 7, the electric push rod 8, the power input end 91, and the power output end 92.

[0026] A distributed optical storage and charging microgrid intelligent system, and its usage method includes the following steps: S1. During the day, when the optical storage and charging system generates sufficient electricity, the power supply module supplies power to the multi-gun charging pile. When the power generation is insufficient, the energy storage module supplies supplementary power to the multi-gun charging pile. As Figure 8 shown, at the same time, monitor the discharge state of the energy storage battery pack to obtain its health condition and remaining power; S2. When it is monitored that either the health state of a certain energy storage battery pack Q is poor or its power drops to the lowest threshold, obtain the usage status of the corresponding multi-gun charging pile q; S2.1. When there is a vehicle A that is being charged and a vehicle B that is fully charged and has not been picked up for an overdue time on the multi-gun charging pile q at the same time, disconnect the power supply of the energy storage battery pack Q to the charging gun a on the vehicle A and the charging gun b on the vehicle B, and realize the connection of the charging gun a and the charging gun b through the double-vehicle charger inside the multi-gun charging pile q, and transfer the power inside the vehicle B to the vehicle A. As Figure 9 shown, until their total power is the same, stop the power exchange between the two; S2.2. When there are other vehicles being charged on the multi-gun charging pile q in addition to the vehicle A and the vehicle B, first perform step S2.1, and then supply auxiliary power to the other vehicles on the multi-gun charging pile q through the public power grid system; S2.3. When all the vehicles on the multi-gun charging pile q are being charged, supply auxiliary power to all the vehicles on the multi-gun charging pile q through the public power grid system; S3. In any of the cases where the photovoltaic power generation is insufficient, the health state of the energy storage battery pack Q is poor, or the power of the energy storage battery pack Q drops to the lowest threshold, when an electric vehicle goes to the multi-gun charging pile q for charging, first ask the user whether they agree to delay charging until night; When the user agrees, after connecting the vehicle and the multi-gun charging pile q, the multi-gun charging pile q does not charge the vehicle temporarily; When the user disagrees, after connecting the vehicle to the multi-gun charging pile q, the multi-gun charging pile starts to supply power to the vehicle, and then obtains the usage status of the multi-gun charging pile, and performs one of Step S2.1, Step S2.2, or Step S2.3 according to the usage status; S4. At night, supply power to all multi-gun charging piles through the public power grid system.

[0027] In Step S2.1, for vehicle B that is fully charged and not picked up after the timeout, due to the long-term occupancy of the parking space, which increases the impact of insufficient pile position resources, therefore, through the battery swapping operation in Step S2.1, on the one hand, the above operation can be used as a punishment for vehicle B not being picked up in time, improving the enthusiasm of users to pick up the vehicle in the later stage. On the other hand, by using vehicle B to charge vehicle A instead of a storage battery pack with poor health or insufficient power, the above problems existing in the storage battery pack can be effectively alleviated, and the load on the public power grid system is also reduced. Combined with the operation of the public power grid system to assist in power supply to other vehicles, the storage battery pack with poor health or insufficient power can be suspended from use, effectively restoring its own state or waiting for later charging.

[0028] The battery swapping method for vehicle A and vehicle B realized by the dual-vehicle battery swapper is: combined with Figure 7 As shown, start the control switches 4 corresponding to vehicle A and vehicle B to disconnect the connection between the battery swapping seat 5 and the wiring board 3, that is, disconnect the charging guns on both vehicle A and vehicle B from the wiring board 3. Then start the sliding seat 7 to drive the power input end 91 and the power output end 92 to move, so that the power input end 91 moves to the upper side of the housing 51 corresponding to vehicle B, and the power output end 92 moves to the lower side of the housing 51 corresponding to vehicle A. Then start the electric push rod 8 to drive the power input end 91 and the power output end 92 to be inserted into the corresponding power output side 5101 and power input side 5102 respectively. The power input end 91 and the power output end 92 are respectively in contact with the conductive elements 52 in a pair of housings 51 to realize circuit connection, so that the power in vehicle B reaches the corresponding conductive elements 52 through the charging gun and the charging line 2. Subsequently, it is transmitted to the conductive elements 52 corresponding to vehicle A through the path of the power input end 91, the power transmission line 10, and the power output end 92, and finally input into vehicle A through the charging line 2 and the charging gun, realizing the battery swapping between vehicle B and vehicle A, effectively alleviating the burden on the storage battery pack with poor health or insufficient power, and this battery swapping does not need to pass through the storage battery pack, and it is not easy to increase the operating load of the storage battery pack.

[0029] In Step S3, when the photovoltaic power generation is insufficient, the health status of the energy storage battery pack Q is poor, or the power of the energy storage battery pack Q is insufficient, it indicates that the photovoltaic energy storage charging system is difficult to supply power to the multi-gun charging pile and the vehicle. At this time, through the operation of delaying the vehicle until night, the load on the photovoltaic energy storage charging system can be effectively reduced, and it is not easy to increase the daytime load on the public power grid system, which has a positive significance for the safety of the photovoltaic energy storage charging system and the stable daytime operation of the public power grid system.

[0030] In addition, since the battery replacement operation in step S2.1 is set, 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.

[0031] The method for judging 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, the temperature change of the energy storage battery pack is monitored. When the temperature exceeds the set safe temperature range, the energy storage battery pack is judged to be in a poor health state. Generally speaking, a matching heat dissipation module is provided in the light storage and charging system to cool the energy storage battery pack. Therefore, under normal circumstances, the operating temperature of the energy storage battery pack will be in a fluctuating safe range, that is, the safe temperature range set in this application. When the operating temperature of the energy storage battery pack exceeds the temperature range during discharge, it indicates that the energy storage battery pack has a risk of thermal runaway. At this time, it is judged that the energy storage battery pack is in a poor health state, so as to perform operations such as power replacement or auxiliary power supply of the public power grid system in step S2 (in actual situations, the basis for judging 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 judged that the energy storage battery pack is in a poor health state); In addition, the solar storage and charging system also includes an early warning module connected to the health monitoring module. When a storage battery pack is judged to be in poor health for multiple times (such as 3 times), the early warning module will issue a fault warning to remind personnel to check the above storage battery pack in time, thereby reducing the risk of fire caused by thermal runaway.

[0032] Supplementary description: In step S2, after steps S2.1, S2.2 or S2.3, the energy storage battery pack is in a stopped operating state without load. Case 1: When the energy storage battery pack stops operating due to insufficient power, the stop operation has no time limit until it is fully charged again and can operate again. During this period, all the vehicles connected to the corresponding multi-gun charging pile are powered by the public power grid system. Case 2: When the energy storage battery pack stops operating due to poor health, it can operate again after T hours (such as 2 hours). And after T hours, vehicles A and B still maintain the battery swapping operation in step S2.1. After their total power is the same, the battery swapping stops. At this time, the energy storage battery pack continues to charge vehicle A, vehicle B remains in the state of returning electricity but not fully charged, and the vehicles assisted by the public power grid system and the newly connected vehicles are directly powered by the energy storage battery pack.

[0033] 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, it will send an information reminder of picking up the vehicle in time to the mobile terminal and give a set pick-up time, such as within 1 hour. When the vehicle is not picked up after exceeding 1 hour, it is determined that the vehicle is a vehicle that has not been picked up on time.

[0034] The 3rd implementation mode: Based on the 1st implementation mode, in this implementation mode, when the user selects to agree to delay charging until night in step S3, the user will obtain the right to use the refusal of battery swapping once.

[0035] When the user charges the vehicle next time, through the connection between the mobile terminal and the multi-gun charging pile, the user can check the item of refusing battery swapping online, so that during this charging process, even if the vehicle is fully charged but not picked up on time, the double-vehicle battery exchanger will not select this vehicle as the battery swapping object (i.e., vehicle B), so that it can keep the full charge state and facilitate the current use. Through the above reward operation, the enthusiasm of the user to agree to night charging in step S3 can be improved, so as to effectively cope with the situation that the photovoltaic energy storage charging system has insufficient power supply or poor health, and it is not easy to increase the daytime load of the public power grid system.

[0036] Combined with the current actual needs, the above implementation modes adopted by this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A distributed optical storage and charging microgrid intelligent system, characterized in that: It includes a light storage and charging system and a power consumption 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. The power consumption end includes multiple multi-gun charging piles corresponding to the energy storage battery packs one by one. The multi-gun charging pile comprises a pile body (1), wherein the pile body (1) is respectively connected to a plurality of charging guns via a plurality of charging cables (2), a dual-car power converter is arranged inside the pile body (1), and the dual-car power converter comprises a wiring board (3), the outer end of the wiring board (3) is electrically connected to a plurality of control switches (4), the control switch (4) is electrically connected to a power converter seat (5) via a wire, the ends of the plurality of charging cables (2) are respectively electrically connected to the plurality of power converter seats (5), the power converter seat (5) comprises a shell (51), a conductive element (52) is fixedly connected inside 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 exchanger also includes a pair of dynamic power exchange units, which include 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).

2. The intelligent system of a distributed optical storage and charging microgrid according to claim 1, wherein: The power consumption end is also connected to a public power grid system, and 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. A distributed optical storage and charging microgrid intelligent system according to claim 1, characterized in that: A transmission line (10) is electrically connected between the power input end (91) and the power output end (92); a circuit formed by the power input end (91), the power output end (92) and the transmission line (10) is a unidirectional circuit, and the direction of current is from the power input end (91) to the power output end (92).

4. The intelligent system of a distributed optical storage and charging microgrid according to claim 3, characterized in that: 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.

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

6. The intelligent system of a distributed optical storage and charging microgrid according to claim 5, 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 inside 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.

7. The intelligent system of a distributed optical storage and charging microgrid according to claim 2, characterized in that: The method of use includes the following steps: 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 pile. When power generation is insufficient, the energy storage module supplements the power supply to the multi-gun charging pile, and monitors the discharge status of the energy storage battery group to obtain its health status and remaining power. S2. When it is detected that a certain energy storage battery group Q is in a poor health state or its power level drops to a minimum threshold, the usage status of the corresponding multi-gun charging pile q is obtained; S2.

1. When there is a vehicle A that is being charged and a vehicle B that is fully charged and has not been picked up after the timeout on the multi-gun charging pile q at the same time, disconnect the power supply of the energy storage battery pack Q to the charging gun a on vehicle A and the charging gun b on vehicle B, and connect the charging gun a and the charging gun b through the two-vehicle charger inside the multi-gun charging pile q to transfer the electricity inside vehicle B to vehicle A until their total electricity amounts are the same; S2.

2. When there are other vehicles being charged on the multi-gun charging pile q in addition to vehicle A and vehicle B, first perform step S2.1, and then assist in powering the other vehicles on the multi-gun charging pile q through the public power grid system; S2.

3. When all the vehicles on the multi-gun charging pile q are being charged, assist in powering all the vehicles on the multi-gun charging pile q through the public power grid system; S3. In any of the following three situations: insufficient photovoltaic power generation, poor health status of the energy storage battery pack Q, or the power of the energy storage battery pack Q drops to the lowest threshold, when an electric vehicle goes to the multi-gun charging pile q for charging, first ask the user whether they agree to delay charging until night; When the user agrees, after connecting the vehicle and the multi-gun charging pile q, the multi-gun charging pile q does not charge the vehicle for the time being, and the user will obtain the right to use a refusal to swap batteries once; When the user does not agree, after connecting the vehicle and the multi-gun charging pile q, the multi-gun charging pile starts to supply power to the vehicle, and then obtains the usage status of the multi-gun charging pile, and performs one of step S2.1, step S2.2, or step S2.3 according to the usage status; S4. At night, supply power to all multi-gun charging piles through the public power grid system.

8. The intelligent system of a distributed optical storage and charging microgrid according to claim 7, characterized in that: The judgment method for the health status of the energy storage battery pack includes the following operations: During the process of the energy storage battery pack supplying power to the multi-gun charging pile, monitor the temperature change of the energy storage battery pack. 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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