Charging management system and method

Abstract

The invention relates to a charging management system and method. The charging management system comprises a control system, an input source, N charging modules and N charging guns. Wherein the input source is connected with the N charging modules through the input bus and the N contactors; the control system is connected with the N charging modules through a first bus; the N charging modules are respectively connected with the N groups of output buses in a one-to-one manner; the N groups of output buses are respectively connected with the N charging guns in a one-to-one manner through the N contactors Q1 to QN; n is a positive integer greater than or equal to 1; the control end of the contactor is connected with the control system; the input source is any one of a photovoltaic power supply, a 380V power supply, a 220V power supply, an energy storage battery and a vehicle. The charging module in the management system can be repeatedly reused, so that charging assemblies are effectively saved, the cost is saved, the energy conversion frequency is reduced, and the energy conversion efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle charging, and in particular to a charging management system and method. Background Art

[0002] In the prior art, the integrated photovoltaic storage and charging management system usually includes components such as photovoltaic units, photovoltaic inverters, energy storage batteries, energy storage battery chargers, energy storage inverters, and charging piles; the management system stores solar energy in energy storage batteries to meet the needs of the power grid and electric vehicle charging.

[0003] However, the components of the charging management system in the prior art are high in cost, the energy passes through multiple equipment components, the conversion efficiency is low, and a large installation site is required. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a charging management system and method.

[0005] On the one hand, the present application provides a charging management system, including: a control system, an input source, N charging modules, and N charging guns; wherein the input source is connected to the N charging modules through an input bus and N contactors respectively; the control system is connected to the N charging modules through a first bus; the N charging modules are connected one-to-one with N groups of output buses respectively; the N groups of output buses are connected one-to-one with the N charging guns through N contactors Q1 to QN respectively; N is a positive integer greater than or equal to 1; the control end of the contactor is connected to the control system; the input source is any one of photovoltaic, 380V power supply, 220V power supply, energy storage battery, and vehicle.

[0006] On the other hand, the present application also provides a charging management method, including: Obtain the input mode of each charging module, determine the input source according to the input mode, and connect the corresponding input source to the corresponding charging module; the input source is any one of photovoltaic, energy storage battery, 380V power supply, 220V power supply, and vehicle; Get the charging gun plug-in status. If the charging gun is plugged in, read the corresponding vehicle information and battery information through the first bus; determine whether the vehicle meets the charging conditions based on the vehicle information and battery information; If it meets the requirements, the charging module is controlled to charge the vehicle.

[0007] Compared with the prior art, the embodiments of the present application have at least the following beneficial effects: the control system controls any one of a variety of input sources such as photovoltaic, 380V power supply, 220V power supply, energy storage battery, vehicle, etc. to access the charging module through multiple groups of contactors, so that the charging module can be reused repeatedly, saving components such as photovoltaic inverters, energy storage batteries, energy storage battery chargers, energy storage inverters, charging piles, etc., effectively saving component costs and occupied space, and reducing the number of energy conversions, greatly improving energy conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is a schematic diagram of a charging management system in the prior art; Figure 2 A schematic diagram of an interface is provided for a display device; Figure 3 It is a schematic diagram of a multi-input source charging management system; Figure 4 This is a schematic diagram of multiple output buses connected in parallel; Figure 5 This is a schematic diagram of the photovoltaic input source charging management system; Figure 6 Schematic diagram of the charging management system for the energy storage battery input source; Figure 7 This is a schematic diagram of the 380V input source charging management system; Figure 8 Schematic diagram of connecting the charging management system to the power grid; Fig. 9 Schematic diagram of vehicle-to-vehicle charging for the charging management system; Fig.10 A flow chart of a photovoltaic input source charging management method; Fig.11 A flow chart of a method for managing the input source charging of an energy storage battery; Fig.12 Displays a setup diagram for car-to-car charging; DETAILED DESCRIPTION

[0010] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0011] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] A charging management system and method according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0013] In the prior art, such as Figure 1 As shown, the photovoltaic charging system usually includes a photovoltaic power generation system, an energy storage system, and a charging pile system.

[0014] Photovoltaic power generation systems usually consist of photovoltaic units and inverters (which convert direct current from solar panels into alternating current), which convert solar energy into electrical energy to meet the needs of the power grid and the charging needs of electric vehicles; they usually include: factory photovoltaics, rooftop photovoltaics, and carport photovoltaics.

[0015] Energy storage systems usually include energy storage battery chargers, energy storage batteries, energy storage inverters, etc., which are used to store surplus photovoltaic power or low-priced electricity from the grid and release it when needed.

[0016] The charging pile system usually includes DC charging pile (fast charging pile) and AC charging pile.

[0017] In the existing technology, the photovoltaic charging system converts light energy into 380V AC or DC power through a photovoltaic unit and stores it in a battery, and then charges the new energy vehicle through a power storage inverter (PCS) or a charging pile module.

[0018] In the traditional solution, the photovoltaic inverter converts light energy into 380V AC, usually with a conversion efficiency of about 0.95; the process of converting 380V AC into DC and storing it in the energy storage battery usually has an energy consumption of about 0.5, that is, the conversion rate is about 0.95; the energy storage battery usually has a loss of 0.3 during the energy storage process, that is, the utilization rate is about 0.97; the energy storage battery outputs 380V AC through the inverter, and the conversion efficiency is usually 0.94; and the energy consumption of the charging pile itself is about 0.06, that is, the utilization rate is about 0.94; in summary, from the photovoltaic unit to the charging pile, the utilization rate of electric energy is: 0.95*0.95*0.97*0.94*0.94=77.35%. On the one hand, the management system cannot flexibly control each charging pile and energy storage battery, there is a large amount of conversion power loss, the conversion efficiency is low, and there is a lot of energy waste. On the other hand, the components in the system are expensive and require a large installation site.

[0019] In view of this, the present application provides a charging management system and method. The control system uses multiple groups of contactors to control multiple input sources to charge the vehicle through the charging module and output bus; by repeatedly reusing a charging module, it saves components such as photovoltaic inverters, energy storage batteries, energy storage battery chargers, energy storage inverters, charging piles, etc., greatly saving charging costs, reducing the number of energy conversions, and improving energy conversion efficiency.

[0020] Terminology explanation: MPPT (Maximum Power Point Tracking): The full name is "maximum power point tracking". The MPPT controller can detect the power generation voltage of the solar panel (photovoltaic unit) in real time and track the maximum voltage and current value (VI) to enable the system to output at maximum power.

[0021] Figure 2 is a schematic diagram of a display device setting interface provided by an embodiment of the present application, such as Figure 2 As shown, the input and output modes of each charging module can be customized on the display interface, and the values ​​(input mode, output mode) set by the user through the display interface can be transmitted to the control system; Figure 2As shown in the display interface; users can set the input mode to four modes: photovoltaic input mode, 380V three-phase input mode, 220V input mode, energy storage battery input mode, and vehicle mode; and set the working time period of the corresponding input mode. For example, when selecting the photovoltaic input mode, the corresponding working time period can be set to 8:00-17:00; during this time period, the sunlight is relatively sufficient. During this working time period, the control system will control the photovoltaic unit to access the charging module and perform photovoltaic charging through the charging module. Alternatively, during the time period of 17:00-23:00, the light is reduced, and the input mode can be set to energy storage battery or 380V, 220V power supply through the display interface. Similarly, the output mode can be set to energy storage battery mode, charging gun mode, inverter mode, etc.; when the user sets it to charging gun mode, the charging module will output the power to the vehicle through the charging gun; when there is no vehicle charging demand, the control system will control the charging module to automatically store the power in the energy storage battery.

[0022] Figure 3 is a schematic diagram of a charging management system structure provided by an embodiment of the present application, such as Figure 3 As shown, the charging management system includes: It includes a control system, an input source, N charging modules, and N charging guns; wherein the input source is connected to the N charging modules through an input bus and N contactors respectively; the control system is connected to the N charging modules through a first bus; the N charging modules are connected one-to-one with N groups of output buses respectively; the N groups of output buses are connected one-to-one with the N charging guns through N contactors Q1 to QN respectively; N is a positive integer greater than or equal to 1; the control end of the contactor is connected to the control system; the input source is any one of photovoltaic, 380V power supply, 220V power supply, energy storage battery, and vehicle.

[0023] In the embodiment of the present application, the charging module may be an isolated charging module having AC and DC dual input characteristics and outputting DC power, such as UR100030SW-AD, HEG75050, and the like.

[0024] The input bus may be a two-wire or three-wire input bus; the charging gun may refer to a separate charging gun or a charging pile with a charging gun.

[0025] In the present application, the contactor is a high-voltage DC contactor, which is a vacuum high-voltage DC contactor and belongs to an electromagnet switch. The high-voltage DC contactor is, for example, JCQ350G1EA01, EVQ250, etc.; the high-voltage DC contactor here is a contactor with a working voltage greater than or equal to 200V, for example, a working voltage of 750V, 1000V, etc.; the control end of the contactor is connected to the control system, and the control system controls its closing or opening to control the closing or opening of the circuit where the contactor is located.

[0026] The first bus is a data communication bus, such as a CAN bus, a CANFD bus, etc.

[0027] The control system consists of a controller and related control circuits, which are used to control the entire charging management system. The specific structure will not be described in detail in this application.

[0028] Charging modules 1 to charging modules N are connected one-to-one with N groups of output buses TP1, TP2...TPN respectively; N groups of output buses TP1, TP2...TPN are connected one-to-one with charging guns 1 to charging guns N through contactors Q1, Q2...QN respectively; the output buses TP1...TPN include positive and negative lines: TP1+, TP1-, TP2+, TP2-....TPN+, TPN-.

[0029] The charging management system in this embodiment can control multiple groups of contactors to access different input sources to the charging module through the control system, and reuse the charging module. On the one hand, it can reduce the photovoltaic inverter, energy storage battery charger, energy storage battery, inverter, charging pile and other components in the traditional charging management system, effectively saving the cost of the charging management system; on the other hand, in the embodiment of the present application, the energy transfer path is from the input source to the charging module and the charging gun. Compared with the energy transfer path in the traditional photovoltaic charging management system: photovoltaic inverter to 380V AC, 380V AC converted to DC to energy storage battery, storage battery to AC, AC to charging pile, the management system in the embodiment of the present application can reduce the number of conversions by 1 to 3 times and reduce energy loss by 5%-15%. That is, the present application greatly simplifies the energy transfer path, improves energy conversion efficiency, and reduces energy loss.

[0030] In another embodiment of the present application, Figure 4 As shown, the Kth group of output buses are connected to the K+1th to Nth groups of output buses respectively through NK contactors; K is a positive integer greater than or equal to 1 and less than N.

[0031] Exemplarily, the output bus TP1 is connected to the remaining N-1 groups of output buses TP2 to TPN through N-1 contactors K1_1, K1_2, ... K1_N-1.

[0032] In this embodiment, when the control system controls any one or more of the contactors K1_1, K1_2...K1_N-1 to be closed, the power output by the charging module 1 can be evenly distributed to the output bus TP1 and the other output buses connected in parallel therewith through the charging module, and multiple vehicles can be charged simultaneously through the charging guns on the corresponding output buses. For example, the power output by the charging module 1 is 600kw, and the contactors K1_1, K1_2, Q1, Q2, and Q3 are closed. After the output buses TP1, TP2, and TP3 are controlled to be selected, the three vehicles on the output buses TP1, TP2, and TP3 can be charged simultaneously.

[0033] In another example, the output bus TP2 is connected to the remaining N-2 groups of output buses TP3 to TPN through N-2 contactors K2_1, K2_2, ... K2_N-2, respectively.

[0034] Through the above connection method, the output bus TPN-1 is connected to the output bus TPN through the contactor KN-1_1.

[0035] In this embodiment, there is no specific restriction on the number of the remaining output buses connected in parallel with the Kth group of output bus TPK, and it can be one group or multiple groups, to implement a charging module and charge vehicles on multiple groups of output buses at the same time; K is a positive integer greater than or equal to 1 and less than or equal to N.

[0036] In another example, by controlling contactor K1_1 to close and other contactors K1_2 ... K1_N-1 to open, the energy vehicles on output bus 2 can be charged simultaneously through charging module 1 and charging module 2. For example, the power output of photovoltaic unit 1 through charging module 1 is 300kw, and the power output of energy storage battery or 380V power supply through charging module 2 is 200kw. The control system controls contactor Q1 to open and Q2 to close, so that the power output of charging module 1 and charging module 2 can be concentratedly output to charging gun 2, and vehicle 2 can be charged, achieving energy hybrid output of 500kW.

[0037] In this embodiment, there is no specific restriction on the number of output buses and input sources connected to the output bus TPK. It can be one group or multiple groups to realize mixed input sources connected to multiple charging modules and simultaneously charge the vehicles on a group of output buses in a centralized manner.

[0038] In another embodiment of the present application, when the input source of the charging management system is photovoltaic, the charging management system also includes N photovoltaic units, and the N photovoltaic units are connected one-to-one with N charging modules through N contactors M1 to MN respectively; the control system controls the N charging modules separately through the first bus and the MPPT algorithm.

[0039] like Figure 5 As shown, in an embodiment of the present application, N photovoltaic units are connected one-to-one with the charging modules through N contactors M1 to MN respectively; the control system is connected to the N charging modules through a first bus, and controls the charging modules to output maximum power through the MPPT algorithm.

[0040] In the embodiment of the present application, the control system controls the charging module to perform power tracking through the MPPT algorithm, outputs the maximum power to the charging gun, and charges the corresponding vehicle. The charging module integrates the charging function and the power tracking function, improves the utilization efficiency of the charging module, and reduces energy consumption.

[0041] In another embodiment of the present application, when the input source is an energy storage battery, N groups of output buses are connected to the input end of the energy storage battery through N contactors S1 to SN; the output end of the energy storage battery is connected to N charging modules respectively through the input bus and N groups of contactors L1 to LN.

[0042] Specifically, Figure 6 As shown, the output bus TP1 is connected to the input end of the energy storage battery through the contactor S1; the output bus TP2 is connected to the input end of the energy storage battery through the contactor S2; the output bus TP3 is connected to the input end of the energy storage battery through the contactor S3; according to the above connection method, until the output bus is connected to the input end of the energy storage battery through the contactor SN.

[0043] In one example, when the vehicle is not charged, the electricity generated by the photovoltaic unit can be stored in the energy storage battery through the corresponding charging module and the output bus by controlling the corresponding contactors S1 to SN to be closed.

[0044] In another example, when the user sets the input mode of the charging module to the energy storage battery through the display device, the control system can control the corresponding contactors among the contactors L1 to LN to close, so that the energy stored in the energy storage battery can be used to charge the corresponding vehicle through the corresponding charging module and charging gun. For example, when the input mode of the charging module 2 is the energy storage battery, the control system controls the contactors L2 and Q2 to close, so that the energy stored in the energy storage battery can be charged to the vehicle 2 through the charging module 2 and the output bus TP2.

[0045] In the embodiment of the present application, the energy storage battery stores the converted electrical energy on the one hand, and supplies power to the vehicle through the charging module on the other hand, which greatly improves the energy utilization efficiency.

[0046] In another embodiment of the present application, Figure 7 As shown, the charging management system also includes: When the input source is a 380V or 220V power supply, the 380V power supply or the 220V power supply is connected to the input bus through the contactor P1, and the input bus is connected one-to-one with the N charging modules through the contactor switches L1 to LN.

[0047] Exemplarily, when the control system controls the contactors P1 , L1 , and Q1 to close, the connected 380V power source charges the vehicle 1 on the output bus TP1 through the charging module 1 .

[0048] In another embodiment of the present application, Figure 8 As shown, the charging management system also includes an inverter; N groups of output buses are connected to the inverter through N contactors T1 to TN respectively.

[0049] Exemplarily, after the control system controls contactors T1 to TN to close, on the one hand, the electricity in the energy storage battery can be input into the inverter through charging module 1 to charging module N, and after conversion by the inverter, it can be connected to the power supply of the factory or residential building; on the other hand, the electricity generated by photovoltaic unit 1 to photovoltaic unit N can also be input into the inverter through charging module 1 to charging module N, and after conversion by the inverter, it can be connected to the power supply of the factory or residential building.

[0050] In this embodiment, by controlling the contactor switches T1 to TN to be closed, the power in the energy storage battery or photovoltaic unit can be connected to the mains, thereby saving energy.

[0051] In another embodiment of the present application, Fig. 9 As shown, N groups of output buses are connected to the input bus through N contactors Z1 to ZN respectively.

[0052] Exemplarily, when the input mode is set to vehicle on the display device of the charging module 1, after the control system controls the contactors Q1, Z1, L1, K1_1, and Q2 to close, the control system can control the power in the vehicle 1 to charge the vehicle 2 through the transmission path of the charging gun 1, the output bus TP1, the input bus, the charging module 1, the output bus 2, and the charging gun 2.

[0053] The charging management system of the present application can realize arbitrary selection of 5 input modes and 3 output modes, thereby improving the reuse rate of charging modules, saving charging component costs and reducing energy consumption.

[0054] In another embodiment of the present application, a charging management method is provided, comprising: S101, obtaining a charging module input mode, determining an input source according to the input mode, and connecting the corresponding input source to the charging module; the input mode is any one of photovoltaic, energy storage battery, 380V, 220V, and vehicle; In the embodiment of the present application, the execution subject is a control system; Figure 2As shown, the control system obtains the input mode of each charging module set on the display interface, determines the corresponding input source according to the input mode, and controls the contactor corresponding to the input source to close, connecting the input source to the charging module; the input module source is any one of photovoltaic, energy storage battery, 380V power supply, 220V power supply, and vehicle.

[0055] In the embodiments of the present application, Figure 10-11 As shown, the input and output modes of each charging module can be set through the display interface. Figure 10-11 This is only for the case where the input mode is photovoltaic and energy storage battery. The charging judgment process for other input modes is the same and will not be repeated here.

[0056] Exemplarily, if the input mode of the charging module K is set to the photovoltaic mode, the contactor MK is controlled to close so that the photovoltaic unit K serves as the input source of the charging module K; wherein K is a positive integer greater than or equal to 1 and less than or equal to N.

[0057] Exemplarily, if the input mode of the charging module K is set to the energy storage battery mode, the contactor LK is controlled to be closed, so that the energy storage battery serves as the input source of the charging module K.

[0058] Exemplarily, the same input mode can be set for N charging modules at the same time, for example, all of them select the photovoltaic mode; different input modes (mixed mode) can also be selected; for example, charging modules 1 to 3 select the photovoltaic input mode, charging modules 4 to 5 select the energy storage battery input mode, and charging modules 6 to 8 can select the 380V input mode; and the vehicle input mode can be selected between charging modules 9 and 10.

[0059] After the control system obtains the input mode of each charging module, it will determine whether there is at least one charging module online. If so, it will determine the status of the charging gun corresponding to the charging module; if no charging module is online, the display device will prompt an error and disconnect the input source.

[0060] The control system communicates with each charging module through the first bus; charging modules 1 to N are connected one-to-one with the corresponding output buses TP1 to TPN respectively; and the output buses TP1 to TPN are connected to charging guns 1 to N through contactors Q1 to QN respectively. Among them, the first bus can be a CAN bus, a CANFD bus, etc.

[0061] S102, obtaining the plug-in status of the charging gun, if the charging gun is plugged in, reading the corresponding vehicle information and battery information through the first bus; judging whether the vehicle meets the charging conditions through the vehicle information and battery information.

[0062] If the charging gun is plugged into the vehicle, it will return a plugged-in status to the control system.

[0063] For example, when the charging gun is in the plugged-in state, the charging gun returns a voltage value of 4V; if it is not plugged-in, the charging gun returns a voltage value of 6V; if it is unplugged, the charging gun returns a voltage value of 12V.

[0064] When the charging gun is plugged in, the control system reads the vehicle information and battery information through CAN communication.

[0065] Specifically, when the control system obtains the signal that the charging gun and the vehicle have successfully shaken hands (based on GBT2790-2015 Communication protocol between non-onboard conductive chargers and battery management systems for electric vehicles, the charging guns mentioned in this application are all based on this protocol), the charging gun switch is controlled to turn on.

[0066] S103: If the conditions are met, control the charging module to charge the vehicle.

[0067] In another embodiment, the charging management method further includes: When the input mode of the charging module is set to the photovoltaic mode, the charging module is controlled to periodically track the power of the photovoltaic unit. When the maximum power point is tracked, the charging module is controlled to charge the vehicle with a power within the maximum power point threshold range during the cycle.

[0068] In this embodiment, when the charging gun switch is turned on, the photovoltaic unit charges the corresponding vehicle through the charging module; at the same time, the control system communicates with the charging module through the first bus, records the change values ​​of the input voltage, input current, output voltage, and output current of the charging module, and calculates the input power and output power of the charging module.

[0069] Generally, the photovoltaic intensity will change greatly with time or weather, and accordingly, the output power of the photovoltaic unit will also change dramatically. For example, at a certain moment, the charging module tracks the maximum output power of the photovoltaic unit and outputs it to the outside; at the next moment, the maximum output power of the photovoltaic unit has fluctuated greatly. If it is still output to the outside at the output power of the previous moment, the actual output power will be inconsistent with the tracked maximum output power.

[0070] In view of this, in order to ensure that the charging module continues to output at maximum power or charge the vehicle, in this embodiment, the control system periodically controls the charging module to perform maximum power scanning, that is, at a certain time period, such as 0.1 seconds to 0.3 seconds, the output power is controlled to gradually increase from a power value to the module limit power, that is, the maximum output power point.

[0071] Furthermore, in order to accurately identify the maximum power point, the present embodiment adopts the following method: within a time period, when the difference between the preset power value (an empirical value preset according to the output power of the photovoltaic unit) and the actual output power value of the charging module is less than the preset threshold value, it means that the output power at this moment is the maximum power point Pmax; at the same time, the input voltage Vmax of the charging module at this moment is recorded, and the charging module is controlled to work within the positive and negative A% range of this input voltage within the time period, and the power range corresponding to the positive and negative A% range of the voltage Vmax is the maximum power point threshold range, and A is a natural number greater than or equal to 0. And in the next time period, the maximum power is re-scanned. The implementation process of periodic scanning is as follows: release the output power of the charging module until the output power drops to B% of the maximum power tracked in the previous time period, B is a natural number greater than or equal to 0, and then gradually control the charging module to increase the output power until the output power within the time period reaches the maximum output power point within the time period.

[0072] Furthermore, when the output power of the charging module is lower than a certain threshold, such as lower than 30w, the charging module will automatically shut down and automatically restart at a fixed time to perform a power scan.

[0073] In the embodiment of the present application, on the one hand, by periodically tracking the maximum power point, the power output by the charging module can be kept within the maximum power point threshold range as much as possible, thereby improving energy utilization. On the other hand, the control system and the charging module cooperate in real time through CAN communication, and the control system independently controls each charging module through the MPPT algorithm and the CAN bus, so that the charging module integrates charging and power tracking functions, fully utilizes the charging module, and reduces energy consumption.

[0074] In another embodiment, when it is detected that the photovoltaic unit K meets the charging conditions and the charging guns K to M are in the plugged-in state, the photovoltaic unit K is controlled to charge vehicles K to M at the same time; K is a positive integer greater than or equal to 1 and less than or equal to N; M is a positive integer greater than or equal to K and less than or equal to N.

[0075] For example, when N=8, there are 8 photovoltaic units and 8 charging modules. When it is monitored that the photovoltaic unit 2 meets the charging conditions and the charging guns 2 to 5 are in the plugged-in state, the contactors K2_1, K2_2, and K2_3 are all controlled to be closed, and the control system can control the charging module 2 to charge the 4 vehicles on the output bus TP2 to TP5 at the same time.

[0076] In this embodiment, the photovoltaic unit 2 meets the charging condition, which means that the power output by the photovoltaic unit 2 is greater than the total power demand of the four vehicles on the output bus.

[0077] In another embodiment, when it is detected that the charging gun K is in the plugged-in state, the charging modules 1 to K are controlled to charge the vehicles on the output bus TPK simultaneously; K is a positive integer greater than or equal to 1 and less than or equal to N.

[0078] Specifically, when N=8, there are 8 photovoltaic units and 8 charging modules. When it is detected that the charging gun 4 is in the plugged-in state, the contactors K1_3, K2_2, and K3_1 are controlled to be closed, and the control system controls the charging modules 1 to 4 to charge the vehicle 4 on the output bus 4 at the same time.

[0079] In another embodiment, when it is detected that the charging gun is in the unplugged state, the charging module is controlled to store the electric energy generated by the photovoltaic unit into the energy storage battery.

[0080] Specifically, when the vehicle is finished charging, the charging gun will be unplugged, and the charging gun will return a high level of 12V. When the control system detects the high level, it controls the contactor on the corresponding charging bus to close, and stores the power output from the corresponding charging module into the energy storage battery.

[0081] For example, when it is detected that the charging gun 2 on the matching output bus TP2 is unplugged, the control system controls the contactor S2 to close, and stores the power output by the charging module 2 into the energy storage battery.

[0082] In another embodiment, when the input mode of the charging module is set to the energy storage battery mode, the energy storage battery is controlled to charge the vehicle.

[0083] In another embodiment, when the input mode of the charging module is set to the 380V or 220V mode, the 380V or 220V power supply is controlled to charge the vehicle.

[0084] In another embodiment, when the input mode of the charging module is set to the photovoltaic mode and the charging module is not charging the vehicle, the charging module is controlled to connect the electric energy generated by the photovoltaic unit to the mains through the inverter.

[0085] Specifically, when there is no vehicle connected for charging and the input mode is photovoltaic input, the contactors T1 to TN are controlled to be closed, so that the electricity generated by photovoltaic unit 1 to photovoltaic unit N is connected to the inverter through the corresponding charging module 1 to charging module N, and the output bus, and is connected to the mains to supply power to the home or factory.

[0086] In another embodiment, when the input mode is selected as the energy storage battery mode and the charging module is not charging the vehicle, the charging module is controlled to connect the electric energy in the energy storage battery to the mains through the inverter.

[0087] Specifically, when there is no vehicle connected for charging and the input mode is the energy storage battery, the contactors T1 to TN are controlled to be closed, so that the electricity stored in the energy storage battery passes through the corresponding charging module 1 to the charging module N, and the output bus is connected to the inverter and connected to the mains to supply power to the home or factory.

[0088] In another embodiment, when the input modes of some charging modules are set to photovoltaic mode, the input modes of some charging modules are set to energy storage battery mode, and the charging modules are not charging the vehicle, the charging modules are controlled to connect the electric energy generated by the photovoltaic unit and the electric energy stored in the energy storage battery to the mains through the inverter.

[0089] Specifically, when there is no vehicle connected for charging, and some charging modules have selected the photovoltaic mode and some have selected the energy storage battery mode, the contactors T1 to TN are controlled to be closed, so that the electricity generated by the photovoltaic unit and the electricity stored in the energy storage battery are connected to the inverter through the corresponding charging module 1 to the charging module N, and the output bus is connected to the mains to supply power to the home or factory.

[0090] Through the implementation mode of the present application, when there is no vehicle charging, the control system can control the power generated by the photovoltaic unit or the power stored in the energy storage battery to be connected to the inverter and then connected to the mains for use in households or factories, thereby saving energy.

[0091] In another embodiment, when the input mode is selected as the vehicle mode, vehicle-to-vehicle charging can be achieved between two vehicles through corresponding charging modules.

[0092] Specifically, see Fig.12 When the vehicle mode is selected in the input mode, the display device will further pop up vehicle setting details, such as Fig.12 As shown, if the input box selects charging gun 2, it means that vehicle 2 into which charging gun 2 is inserted needs to be charged, and if the corresponding output box selects charging gun 3, it means that vehicle 3 into which charging gun 2 is inserted will release electricity; specifically, the control system controls contactors Q3, Z3, L2, and Q2 to close; the electricity in vehicle 3 will pass through charging gun 3, output bus TP3, contactor Z3, input bus, contactor L2, charging module 2, output bus TP2, contactor Q2, and charging gun 2 to vehicle 2, thereby enabling vehicle 3 to charge vehicle 2.

[0093] In another embodiment, multiple input vehicles and output vehicles can be selected at the same time, and the corresponding input and output vehicles are charged one-to-one.

[0094] In the embodiments of the present application, vehicle-to-vehicle charging can be achieved without going through energy storage batteries or photovoltaic units, which is convenient and fast.

[0095] In the above description, the details of the technical solution of the present invention are explained. However, those skilled in the art can understand that the present invention is not limited to the specific details listed in the above embodiments, but can be changed within the scope defined by the claims.

[0096] The above description is only a preferred implementation mode of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A charging management system, characterized in that: Including control system, input source, N charging modules, and N charging guns; Wherein, the input source is connected to the N charging modules through an input bus and N contactors respectively; The control system is connected to the N charging modules via a first bus; The N charging modules are respectively connected one-to-one with the N groups of output buses; The N groups of output buses are connected one-to-one with the N charging guns through N contactors Q1 to QN respectively; N is a positive integer greater than or equal to 1; The control end of the contactor is connected to the control system; The input source is any one of photovoltaic, 380V power supply, 220V power supply, energy storage battery, and vehicle.

2. The charging management system according to claim 1, characterized in that: The Kth group of output buses are connected to the K+1th to Nth groups of output buses respectively through NK contactors; K is a positive integer greater than or equal to 1 and less than N.

3. The charging management system according to claim 1, characterized in that: When the input source is photovoltaic, the charging management system also includes N photovoltaic units, and the N photovoltaic units are connected one-to-one with the N charging modules through N contactors M1 to MN respectively; the control system controls the N charging modules respectively through the first bus and the MPPT algorithm.

4. The charging management system according to claim 1, characterized in that: When the input source is an energy storage battery, the N output buses are connected to the input end of the energy storage battery through N contactors S1 to SN; the output end of the energy storage battery is connected to N charging modules respectively through the input bus and N contactors L1 to LN.

5. The charging management system according to claim 1, characterized in that: When the input source is a 380V or 220V power supply, the 380V or 220V power supply is connected to the input bus through a contactor P1, and the input bus is connected one-to-one with N charging modules through contactor switches L1 to LN.

6. The charging management system according to any one of claims 1 to 5, characterized in that: The charging management system also includes an inverter; The N groups of output buses are connected to the inverter through N contactors T1 to TN respectively.

7. The charging management system according to claims 1-5, characterized in that: The N groups of output buses are connected to the input bus through N isolation switches Z1 to ZN respectively.

8. A charging management method, applied to the charging management system according to claims 1-8, characterized in that: Obtain the input mode of each charging module, determine the input source according to the input mode, and connect the corresponding input source to the corresponding charging module; the input source is any one of photovoltaic, energy storage battery, 380V power supply, 220V power supply, and vehicle; Get the charging gun plug-in status. If the charging gun is plugged in, read the corresponding vehicle information and battery information through the first bus; determine whether the vehicle meets the charging conditions based on the vehicle information and battery information; If it meets the requirements, the charging module is controlled to charge the vehicle.

9. The charging management method according to claim 8, characterized in that: When the input mode of the charging module is set to the photovoltaic mode, the charging module is controlled to periodically track the power of the photovoltaic unit. When the maximum power point is tracked, the charging module is controlled to charge the vehicle with a power within the maximum power point threshold range during the cycle.

10. The charging management method according to claim 9, characterized in that: When it is detected that the photovoltaic unit K meets the charging conditions and the charging guns K to M are in the plugged-in state, the photovoltaic unit K is controlled to charge the vehicles K to M at the same time; K is a positive integer greater than or equal to 1 and less than or equal to N; M is a positive integer greater than or equal to K and less than or equal to N; Or, when it is detected that the charging gun K is in the plugged-in state, the charging modules 1 to K are controlled to charge the vehicles on the output bus TPK at the same time; K is a positive integer greater than or equal to 1 and less than or equal to N.

11. The charging management method according to any one of claims 9 to 10, characterized in that: When it is detected that the charging gun is in the unplugged state, the charging module is controlled to store the electric energy generated by the photovoltaic unit into the energy storage battery.

12. The charging management method according to claim 8, characterized in that: When the input mode of the charging module is set to the energy storage battery mode, the energy storage battery is controlled to charge the vehicle through the charging module.

13. The charging management method according to claim 8, characterized in that: When the input mode of the charging module is set to 380V or 220V mode, the 380V power supply or the 220V power supply is controlled to charge the vehicle through the charging module.

14. The charging management method according to claim 8, characterized in that: When the input mode of the charging module is set to the photovoltaic mode and the charging module is not charging the vehicle, the charging module is controlled to connect the electric energy generated by the photovoltaic unit to the mains through the inverter; Or, when the input mode is selected as the energy storage battery mode and the charging module is not charging the vehicle, the charging module is controlled to connect the electric energy in the energy storage battery to the mains through the inverter; Or, when the input mode of some charging modules is set to photovoltaic mode, the input mode of some charging modules is set to energy storage battery mode, and the charging module is not charging the vehicle, the charging module is controlled to connect the electric energy generated by the photovoltaic unit and the electric energy stored in the energy storage battery to the mains through the inverter.

15. The charging management method according to claim 8, characterized in that: When the input mode of the charging module is set to the vehicle mode, vehicle-to-vehicle charging is achieved between two vehicles through the corresponding charging modules.

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