A charging management system and method

Abstract

The application relates to a charging management system and method, which 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 an input bus and N contactors; the control system is connected with the N charging modules through a first bus; the N charging modules are connected with N groups of output buses one by one; the N groups of output buses are connected with the N charging guns one by one through N contactors Q1-QN; N is a positive integer greater than or equal to 1; the control end of the contactor is connected with the control system; and the input source is any one of photovoltaic, a 380V power supply, a 220V power supply, an energy storage battery and a vehicle. In the management system, the charging modules can be repeatedly reused, charging components are effectively saved, costs are saved, energy conversion times are reduced, and energy conversion efficiency is greatly improved.

Description

TECHNICAL FIELD

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

[0002] In the prior art, the light storage and charging integrated management system usually includes photovoltaic units, photovoltaic inverters, energy storage batteries, energy storage battery chargers, energy storage inverters, charging piles and other components; the management system reserves light energy to the energy storage battery to meet the demand of the power grid and the demand of electric vehicle charging.

[0003] However, the charging management system in the prior art has high cost of each component, the energy passes through multiple device components, the conversion efficiency is low, and a large installation site needs to be occupied. SUMMARY

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

[0005] In one aspect, the present application provides a charging management system, comprising: 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 an input bus and N contactors; the control system is connected with the N charging modules through a first bus; the N charging modules are connected with N groups of output buses one by one; the N groups of output buses are connected with the N charging guns one by one through 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 photovoltaic, 380V power supply, 220V power supply, energy storage battery, and vehicle.

[0006] In another aspect, the present application further provides a charging management method, comprising:

[0007] obtaining the input mode of each charging module, determining the input source according to the input mode, and connecting 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;

[0008] obtaining the state of the charging gun insertion, if the gun is inserted, reading the corresponding vehicle information and battery information through the first bus; determining whether the vehicle meets the charging condition through the vehicle information and battery information;

[0009] if yes, controlling the charging module to charge the vehicle.

[0010] Compared with the prior art, the embodiment of the present application has at least the following beneficial effects: the control system controls any one of the plurality of input sources such as photovoltaic, 380V power supply, 220V power supply, energy storage battery and vehicle to access the charging module through the plurality of contactors, so that the charging module can be repeatedly reused, the components such as photovoltaic inverter, energy storage battery, energy storage battery charger, energy storage inverter and charging pile are saved, the component cost and occupied site are effectively saved, the number of energy conversion is reduced, and the energy conversion efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiment or related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 A charging management system schematic diagram in the prior art;

[0013] Figure 2 A display device setting interface schematic diagram;

[0014] Figure 3 A multi-input source charging management system schematic diagram;

[0015] Figure 4 A schematic diagram of a plurality of output buses in parallel;

[0016] Figure 5 A photovoltaic input source charging management system schematic diagram;

[0017] Figure 6 An energy storage battery input source charging management system schematic diagram;

[0018] Figure 7 A 380V input source charging management system schematic diagram;

[0019] Figure 8 A schematic diagram of the charging management system accessing the power grid;

[0020] Figure 9 A schematic diagram of the charging management system realizing vehicle-to-vehicle charging;

[0021] Figure 10 A photovoltaic input source charging management method flowchart schematic diagram;

[0022] Figure 11 An energy storage battery input source charging management method flowchart schematic diagram;

[0023] Figure 12A schematic diagram is shown for a vehicle-to-vehicle charging display; DETAILED DESCRIPTION

[0024] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0026] A charging management system and method according to an embodiment of the present application will be described in detail below in conjunction with the accompanying drawings.

[0027] In the prior art, as shown in FIG. 1, a photovoltaic charging system usually includes a photovoltaic power generation system, an energy storage system, and a charging pile system. Figure 1

[0028] The photovoltaic power generation system usually consists of photovoltaic units and inverters (convert direct current of solar panels into alternating current), which convert solar energy into electric energy to meet the demand of power grid and electric vehicle charging; and usually includes factory photovoltaic, roof photovoltaic, and carport photovoltaic.

[0029] The energy storage system usually includes energy storage battery chargers, energy storage batteries, and energy storage inverters, etc., which are used to store photovoltaic excess electricity or low-price electricity from the power grid and release it when needed.

[0030] The charging pile system usually includes direct current charging piles (fast charging piles) and alternating current charging piles.

[0031] In the prior art, the photovoltaic charging system converts light energy into 380V alternating current or DC direct current through photovoltaic units, stores it into batteries, and then charges new energy vehicles through energy storage inverters (PCS) or charging pile modules.

[0032] ​In traditional solutions, the photovoltaic inverter typically achieves a conversion efficiency of approximately 0.95 during the conversion of solar energy into 380V AC. The conversion from 380V AC to DC for storage in the energy storage battery typically incurs an energy loss of around 0.5, resulting in a conversion rate of approximately 0.95. The energy storage battery itself experiences a loss of approximately 0.3 during energy storage, resulting in a utilization rate of approximately 0.97. The energy storage battery's conversion efficiency is typically 0.94 when outputting 380V AC through the inverter. The charging pile itself consumes approximately 0.06, resulting in a utilization rate of approximately 0.94. Therefore, the overall energy utilization rate from the photovoltaic unit to the charging pile is: 0.95 * 0.95 * 0.97 * 0.94 * 0.94 = 77.35%. On one hand, the management system lacks flexible control over the charging piles and energy storage batteries, resulting in significant conversion losses, low conversion efficiency, and substantial energy waste. On the other hand, the components in this system are expensive and require a large installation area.

[0033] In view of this, this application provides a charging management system and method.

[0034] The control system uses multiple sets of contactors to control various input sources to charge the vehicle through the charging module and output bus. By repeatedly reusing a charging module, it saves on components such as photovoltaic inverters, energy storage batteries, energy storage battery chargers, energy storage inverters, and charging piles, which greatly saves charging costs and reduces the number of energy conversions, thereby improving energy conversion efficiency.

[0035] Terminology Explanation:

[0036] MPPT (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 highest voltage and current value (VI) so that the system can output maximum power.

[0037] Figure 2 This is a schematic diagram of a display device settings interface provided in an embodiment of this application, such as... Figure 2 As shown, the input and output modes of each charging module can be customized on the display interface. The values ​​(input mode, output mode) set by the user through the display interface can be transmitted to the control system; for example... Figure 2The display interface shows; the user can set the input mode to photovoltaic input mode, 380V three-phase input mode, 220V input mode, energy storage battery input mode, vehicle-to-vehicle mode and the like four modes; and set the working time period of the corresponding input mode, for example, when the photovoltaic input mode is selected, the corresponding working time period can be set to 8:00-17:00; during this time period, the sunlight is relatively sufficient, and during the working time period, the control system controls the photovoltaic unit to access the charging module, and the photovoltaic charging is performed outside through the charging module. Or, during the time period of 17:00-23:00, the light decreases, and the input mode can be set to the energy storage battery or the 380V and 220V power supply through the display interface. Similarly, the output mode can be set to the energy storage battery mode, the charging gun mode, the inverter mode and the like; when the user sets the charging gun mode, the charging module outputs the electric quantity to the vehicle through the charging gun; when there is no vehicle charging demand, the control system controls the charging module to automatically store the electric quantity to the energy storage battery.

[0038] Figure 3 A charging management system structure schematic diagram provided by the embodiment of the application is shown in the figure, the charging management system comprises: Figure 3

[0039] 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 an input bus and N contactors; the control system is connected with the N charging modules through a first bus; the N charging modules are connected with N groups of output buses one by one; the N groups of output buses are connected with the N charging guns one by one through 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; and the input source is any one of photovoltaic, 380V power supply, 220V power supply, energy storage battery and vehicle.

[0040] In the embodiment of the application, the charging module can be an isolation charging module with AC / DC dual input characteristics and DC output, for example, UR100030SW-AD, HEG75050 and the like.

[0041] The input bus can be a two-wire or three-wire input bus; the charging gun can refer to a separate charging gun or a charging pile with a charging gun.

[0042] In the application, the contactor is a high-voltage DC contactor, which is a vacuum high-voltage DC contactor and belongs to an electromagnetic switch; the high-voltage DC contactor is, for example, JCQ350G1EA01, EVQ250 and the like; the high-voltage DC contactor herein is a contactor with a working voltage greater than or equal to 200V, for example, a working voltage of 750V, 1000V and the like; the control end of the contactor is connected with the control system, and the control system controls the closing or opening of the contactor to control the closing or opening of the circuit where the contactor is located. ​

[0043] The first bus is a data communication bus, for example, a CAN bus, a CANFD bus, etc.

[0044] The control system is composed of a controller and related control circuit, used for controlling the whole charging management system, and the specific structure is not described herein.

[0045] The charging module 1 to the charging module N are respectively connected one-to-one with the N groups of output buses TP1, TP2...TPN; the N groups of output buses TP1, TP2...TPN are respectively connected one-to-one with the charging guns 1 to the charging guns N through the contactors Q1, Q2...QN; the output buses TP1...TPN include positive and negative lines: TP1+, TP1-, TP2+, TP2-...TPN+, TPN-.

[0046] The charging management system in the embodiment can control the multiple groups of contactors to access different input sources to the charging modules through the control system, and reuse the charging modules, which can reduce the components such as photovoltaic inverters, energy storage battery chargers, energy storage batteries, inverters, charging piles, etc. in the traditional charging management system, effectively saving the cost of the charging management system; on the other hand, in the embodiment of the application, the energy transmission path is from the input source to the charging module and the charging gun, compared with the energy transmission path in the traditional photovoltaic charging management system: from the photovoltaic inverter to 380V alternating current, and from the 380V alternating current to direct current to the energy storage battery, from the storage battery to alternating current, and from the alternating current to the charging pile, the management system in the embodiment of the application realizes reducing the conversion times by 1 to 3 times and reducing the energy loss by 5%-15%. That is, the application greatly simplifies the energy transmission path, improves the energy conversion efficiency, and reduces the energy loss.

[0047] In another embodiment of the application, as shown in Figure 4 The Kth group of output buses is connected with the K+1th to the Nth group of output buses through N-K contactors respectively; K is a positive integer greater than or equal to 1 and less than N.

[0048] Exemplarily, the output bus TP1 is connected with the remaining N-1 groups of output buses TP2 to TPN through N-1 contactors K1_1, K1_2...K1_N-1 respectively.

[0049] 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 remaining output buses connected in parallel thereto, and the vehicles on the corresponding output buses can be simultaneously charged through the charging guns on the corresponding output buses. For example, if the power output by the charging module 1 is 600 kW, the contactors K1_1, K1_2, Q1, Q2 and Q3 are closed, and the output buses TP1, TP2 and TP3 are controlled to be gated, three vehicles on the output buses TP1, TP2 and TP3 can be simultaneously charged.

[0050] 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.

[0051] Through the above connection mode, the output bus TPN-1 is connected to the output bus TPN through the contactor KN-1_1.

[0052] In this embodiment, the number of the remaining output buses connected in parallel to the Kth group of output buses TPK is not specifically limited, and can be one group or multiple groups, so that one charging module can simultaneously charge the vehicles on multiple groups of output buses; K is a positive integer greater than or equal to 1 and less than or equal to N.

[0053] In another example, by controlling the contactor K1_1 to be closed and the remaining contactors K1_2...K1_N-1 to be disconnected, the energy storage vehicle on the output bus 2 can be simultaneously charged by the charging module 1 and the charging module 2. For example, if the power output by the photovoltaic unit 1 through the charging module 1 is 300 kW and the power output by the energy storage battery or 380V power supply through the charging module 2 is 200 kW, the control system controls the contactor Q1 to be opened and the contactor Q2 to be closed, so that the power output by the charging module 1 and the charging module 2 can be concentrated and output to the charging gun 2, and the vehicle 2 can be charged, achieving a hybrid output of 500 kW.

[0054] In this embodiment, the number of the output buses connected to the output bus TPK and the input sources are not specifically limited, and can be one group or multiple groups, so that multiple charging modules connected to the hybrid input sources can simultaneously charge the vehicles on one group of output buses.

[0055] In another embodiment of the present application, when the input source is photovoltaic, the charging management system further includes N photovoltaic units, the N photovoltaic units are connected to the N charging modules one by one through N contactors M1 to MN, and the control system controls the N charging modules through a first bus and an MPPT algorithm.

[0056] AsFigure 5 As shown in the embodiment of the present application, the N photovoltaic units are respectively connected with the charging modules one by one through the N contactors M1 to MN; the control system is connected with the N charging modules through the first bus, and controls the charging modules to output the maximum power through the MPPT algorithm.

[0057] In the embodiment of the present application, the control system controls the charging modules to perform power tracking through the MPPT algorithm, and 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 the energy consumption.

[0058] In another embodiment of the present application, in the case that the input source is an energy storage battery, the N groups of output buses are connected to the input end of the energy storage battery through the N contactors S1 to SN; the output end of the energy storage battery is connected to the N charging modules through the input bus and the N contactors L1 to LN.

[0059] Specifically, as shown in the figure, Figure 6 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; and according to the above connection mode, the output bus is connected to the input end of the energy storage battery through the contactor SN.

[0060] In an example, when the vehicle is not charged, the electric quantity 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.

[0061] 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 contactor in the contactors L1 to LN to be closed, so that the electric quantity reserved by the energy storage battery can be charged to the corresponding vehicle through the corresponding charging module and the 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 be closed, so that the electric quantity reserved by the energy storage battery can be charged to the vehicle 2 through the charging module 2 and the output bus TP2.

[0062] In the embodiment of the present application, the energy storage battery stores the converted electric energy on one hand, and supplies power to the vehicle through the charging module on the other hand, which greatly improves the energy utilization efficiency.

[0063] In another embodiment of the present application, as shown in the figure, Figure 7 The charging management system further comprises:

[0064] When the input source is a 380V or 220V power supply, the 380V or 220V power supply is connected to the input bus through the contactor P1, and the input bus is connected to the N charging modules one by one through the contactor switches L1-LN.

[0065] For example, when the control system controls the contactors P1, L1 and Q1 to be closed, the accessed 380V power supply charges the vehicle 1 on the output bus TP1 through the charging module 1.

[0066] In another embodiment of the present application, as shown in Figure 8 The charging management system further comprises an inverter, and the N groups of output buses are connected to the inverter through N contactors T1-TN respectively.

[0067] For example, after the control system controls the contactors T1-TN to be closed, on the one hand, the electric quantity in the energy storage battery can be input into the inverter through the charging modules 1-1, and after being converted by the inverter, the power is accessed to the factory or the residential building; on the other hand, the electric quantity generated by the photovoltaic units 1-1 can be input into the inverter through the charging modules 1-1, and after being converted by the inverter, the power is accessed to the factory or the residential building.

[0068] In this embodiment, by controlling the contactor switches T1-TN to be closed, the electric quantity in the energy storage battery or the photovoltaic unit can be accessed to the commercial power, thereby saving energy.

[0069] In another embodiment of the present application, as shown in Figure 9 The N groups of output buses are connected to the input bus through N contactors Z1-ZN respectively.

[0070] For example, when the input mode of the display device of the charging module 1 is set to a vehicle, after the control system controls the contactors Q1, Z1, L1, K1_1 and Q2 to be closed, the control system can control the electric quantity in the vehicle 1 to be transmitted to 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.

[0071] The charging management system of the present application can realize the selection of any of the five input modes and the three output modes, thereby improving the multiplexing rate of the charging module, saving the cost of the charging component and reducing the energy consumption.

[0072] In another embodiment of the present application, a charging management method is provided, which comprises,

[0073] S101, acquiring the input mode of the charging module, determining the input source according to the input mode, and accessing the corresponding input source to the charging module; the input mode is any one of photovoltaic, energy storage battery, 380V, 220V and vehicle;

[0074] In the embodiments of the present application, the execution subject is a control system; as shown in Figure 2 The control system obtains the input mode of each charging module set by the display interface, determines the corresponding input source according to the input mode, controls the contactor corresponding to the input source to close, and connects the input source to the charging module; the input source is any one of photovoltaic, energy storage battery, 380V power supply, 220V power supply and vehicle.

[0075] In the embodiments of the present application, as shown in Figures 10-11 The input and output modes of each charging module can be set through the display interface. Figures 10-11 Only for the case that the input mode is photovoltaic and energy storage battery, the charging judgment process of the remaining input modes is also the same, which will not be described in detail.

[0076] For example, if the input mode of the set charging module K is 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.

[0077] For example, if the input mode of the set charging module K is the energy storage battery mode, the contactor LK is controlled to close, so that the energy storage battery serves as the input source of the charging module K.

[0078] For example, the same input mode can be set for the N charging modules at the same time, for example, all selecting the photovoltaic mode; or different input modes (mixed mode) can be selected; for example, charging module 1 to charging module 3 select the photovoltaic input mode, charging module 4 to charging module 5 select the energy storage battery input mode, and charging module 6 to charging module 8 can select the 380V input mode; charging module 9 and charging module 10 select the vehicle input mode.

[0079] After the control system obtains the input mode of each charging module, it will determine whether at least one charging module is online, if it is online, it will determine the state of the charging gun corresponding to the charging module; if there is no charging module online, the display device will prompt an error, and the input source will be disconnected.

[0080] The control system communicates with each charging module through a first bus; charging module 1 to charging module N are respectively connected to the corresponding output buses TP1 to TPN in one-to-one connection; the output buses TP1 to TPN are connected to the charging guns 1 to 10 through the contactors Q1 to QN. Wherein, the first bus can be CAN bus, CANFD bus, etc.

[0081] S102, obtain the charging gun insertion state, if the gun is inserted, read the corresponding vehicle information and battery information through the first bus; determine whether the vehicle meets the charging conditions through the vehicle information and battery information.

[0082] If the charging gun is plugged into the vehicle, it will return a plug-in state to the control system.

[0083] For example, when in the plug-in state, the charging gun returns a voltage value of 4V, if in the unplug-in state, the charging gun returns a voltage value of 6V, if in the unplug-out state, the charging gun returns a voltage value of 12V.

[0084] When the charging gun is in the plug-in state, the control system reads the vehicle information and battery information through CAN communication.

[0085] Specifically, when the control system obtains a signal that the charging gun and the vehicle have successfully shaken hands (according to the GBT2790-2015 communication protocol between the electric vehicle non-vehicle conductive charger and the battery management system, the charging gun mentioned in this application is based on this protocol), the control charging gun switch is opened.

[0086] S103, if it is consistent, control the charging module to charge the vehicle.

[0087] In another embodiment, the charging management method further comprises:

[0088] In the case where the input mode of the charging module is set to the photovoltaic mode, the control system controls the charging module to periodically perform power tracking on the photovoltaic unit, and when the maximum power point is tracked, the control system controls the charging module to charge the vehicle with the power within the maximum power point threshold interval in the period.

[0089] In this embodiment, when the charging gun switch is opened, 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.

[0090] Generally, the photovoltaic intensity will change greatly over time or weather, and accordingly, the output power of the photovoltaic unit will also change sharply. For example, when the charging module tracks the maximum output power of the photovoltaic unit at a certain moment, it outputs externally; at the next moment, the maximum output power of the photovoltaic unit has already fluctuated greatly, if the output power is still output externally at the last moment, the actual output power will not be consistent with the maximum output power tracked.

[0091] Therefore, in order to ensure that the charging module continuously outputs the maximum power externally or charges the vehicle, in this embodiment, the control system periodically controls the charging module to perform maximum power scanning, that is, every interval of a certain time period, for example, 0.1-0.3 seconds, the control output power is gradually increased from a power value to the module limit power, that is, the maximum output power point.

[0092] Further, in order to accurately confirm the maximum power point, the embodiment adopts the following method: in 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 a 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 in the positive and negative A% interval of the input voltage Vmax in this time period, and the power interval corresponding to the positive and negative A% interval of the voltage Vmax is the maximum power point threshold interval, and A is a natural number greater than or equal to 0. And in the next time period, the maximum power is scanned again. The implementation process of periodic scanning is as follows: release the output power of the charging module until the output power is reduced to B% of the maximum power tracked in the last 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 in this time period reaches the maximum output power point in this time period.

[0093] Further, when the output power of the charging module is lower than a certain threshold value, such as lower than 30w, the charging module will automatically stop and automatically restart at a certain time to perform power scanning.

[0094] In the embodiment of the application, on the one hand, periodic tracking of the maximum power point can make the output power of the charging module output as much as possible in the maximum power point threshold interval, thereby improving the energy utilization rate. On the other hand, the control system and the charging module cooperate in real time through CAN communication, and the control system realizes independent control of 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.

[0095] In another embodiment, in the case that the photovoltaic unit K meets the charging condition 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.

[0096] For example, when N=8, there are 8 photovoltaic units and 8 charging modules, in the case that the photovoltaic unit 2 meets the charging condition and the charging guns 2 to 5 are in the plugged-in state, the contactors K2_1, K2_2 and K2_3 are all closed, and the control system can control the charging module 2 to charge the 4 vehicles on the output buses TP2 to TP5 at the same time.

[0097] In the embodiment, the photovoltaic unit 2 meets the charging condition, which means that the output power of the photovoltaic unit 2 is greater than the total demand power of the 4 vehicles on the output bus.

[0098] In another embodiment, when the charging gun K is detected in the plugged state, the control system controls the charging modules 1 to K to charge the vehicle on the output bus TPK simultaneously; K is a positive integer greater than or equal to 1 and less than or equal to N.

[0099] Specifically, when N = 8, there are 8 photovoltaic units and 8 charging modules, and when the charging gun 4 is detected in the plugged 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 simultaneously.

[0100] In another embodiment, when the charging gun is detected in the unplugged state, the control system controls the charging modules to store the electrical energy generated by the photovoltaic units in the energy storage battery.

[0101] Specifically, when the vehicle charging is completed, the charging gun will be unplugged, and the charging gun will return a 12V high level. When the control system detects the high level, the corresponding contactor on the charging bus is controlled to be closed, and the output of the corresponding charging module is stored in the energy storage battery.

[0102] For example, when the charging gun 2 on the output bus TP2 is detected to be unplugged, the control system controls the contactor S2 to be closed, and the electrical energy output by the charging module 2 is stored in the energy storage battery.

[0103] In another embodiment, when the input mode of the charging module is set to the energy storage battery mode, the control system controls the energy storage battery to charge the vehicle.

[0104] In another embodiment, when the input mode of the charging module is set to the 380V or 220V mode, the control system controls the 380V or 220V power supply to charge the vehicle.

[0105] 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 control system controls the charging module to connect the electrical energy generated by the photovoltaic units to the power grid through the inverter.

[0106] Specifically, when there is no vehicle access to charging, and the input mode is the photovoltaic input, the contactors T1 to TN are controlled to be closed, so that the electrical energy generated by the photovoltaic units 1 to N is connected to the power grid through the corresponding charging modules 1 to N and the output bus, and the power grid is connected to the inverter and the power grid, and the power is supplied to the home or factory.

[0107] 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 control system controls the charging module to connect the electrical energy in the energy storage battery to the power grid through the inverter.

[0108] Specifically, when no vehicle is connected to the charging station and the input mode is the energy storage battery, the control contactors T1 to TN are closed, so that the energy stored in the energy storage battery is connected to the inverter through the corresponding charging module 1 to charging module N and the output bus, and then connected to the mains power to supply power to the home or factory.

[0109] In another embodiment, when the input mode of some charging modules is set to photovoltaic mode and the input mode of some charging modules is set to energy storage battery mode, and the charging modules are not charging the vehicle, the control charging modules connect the electrical energy generated by the photovoltaic unit and the electrical energy stored in the energy storage battery to the mains power through the inverter.

[0110] Specifically, when no vehicle is connected to the charging station, and some charging modules have selected photovoltaic mode and others have selected energy storage battery mode, the control contactors T1 to TN are 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 modules 1 to N and the output bus, and then connected to the mains power to supply electricity to homes or factories.

[0111] According to the implementation method of this application, when there is no vehicle charging, the control system can control the electricity generated by the photovoltaic unit or the electricity stored in the energy storage battery to be connected to the inverter and connected to the mains power for use by households or factories, thus saving energy.

[0112] In another embodiment, when the input mode is selected as vehicle mode, two vehicles can achieve vehicle-to-vehicle charging through their respective charging modules.

[0113] Specifically, see Figure 12 When the vehicle mode is selected in the input mode, the display device will further pop up vehicle settings details, such as... Figure 12 As shown, selecting charging gun 2 in the input box indicates that vehicle 2, into which charging gun 2 is inserted, needs to be charged. Selecting charging gun 3 in the corresponding output box indicates 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, thus enabling vehicle 3 to charge vehicle 2.

[0114] In another embodiment, multiple input and output vehicles can be selected simultaneously, with one-to-one charging for each input and output vehicle.

[0115] In this embodiment of the application, vehicle-to-vehicle charging can be achieved without going through an energy storage battery or photovoltaic unit, which is convenient and fast.

[0116] In the above description, the details of the technical solutions of the present application are described, however, those skilled in the art can understand that the present application is not limited to the specific details listed in the above embodiments, but can be changed within the scope defined by the claims.

[0117] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle 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, Includes a control system, an input source, N charging modules, and N charging guns; The input sources are directly connected to the N charging modules via an input bus and N contactors, respectively. The control system is connected to the N charging modules via a first bus; Each of the N charging modules is connected to one of the N sets of output buses; The N sets of output buses are connected one-to-one with the N charging guns through N contactors Q1 to QN; N is a positive integer greater than or equal to 1; the charging gun is a single charging gun or a charging pile with charging guns. The control terminal of the contactor is connected to the control system. The charging module is an isolated charging module with AC / DC dual input characteristics and DC output. The first bus is a CAN bus; The input source can be any one of photovoltaic, 380V power supply, 220V power supply, energy storage battery, or vehicle. When the input source is photovoltaic, the control system controls N charging modules respectively through the first bus and MPPT algorithm.

2. The charging management system as described in claim 1, characterized in that, The Kth output bus is connected to the (K+1)th to Nth 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 as described in claim 1, characterized in that, When the input source is photovoltaic, the charging management system further includes N photovoltaic units, which are connected one-to-one with the N charging modules through N contactors M1 to MN.

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

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

7. The charging management system as described in any one of claims 1-5, characterized in that, The N output buses are respectively connected to the input buses through N isolation switches Z1 to ZN.

8. A charging management method, applied to the charging management system according to any one of claims 1-7, characterized in that, The input mode of each charging module is obtained, the input source is determined according to the input mode, and the corresponding input source is connected to the corresponding charging module; the input source can be any one of photovoltaic, energy storage battery, 380V power supply, 220V power supply, or vehicle; The charging gun insertion status is obtained. If the gun is inserted, the corresponding vehicle information and battery information are read through the first bus. The vehicle information and battery information are used to determine whether the vehicle meets the charging conditions. If the conditions are met, the charging module will be controlled to charge the vehicle.

9. The charging management method as described in claim 8, characterized in that, When the input mode of the charging module is set to photovoltaic mode, the charging module is controlled to periodically perform power tracking on the photovoltaic unit. When the maximum power point is tracked, the charging module is controlled to charge the vehicle at a power within the threshold range of the maximum power point during that cycle.

10. The charging management method as described in 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 plug-in state, the photovoltaic unit K is controlled to charge the vehicles K to M simultaneously; 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. Alternatively, if the charging gun K is detected to be in the plugged-in state, the charging modules 1 to K are controlled to charge the vehicle on the output bus TPK simultaneously; 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 9-10, characterized in that, When the charging gun is detected to be in the unplugged state, the control charging module stores the electrical energy generated by the photovoltaic unit into the energy storage battery.

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

14. The charging management method as described in claim 8, characterized in that, When the input mode of the charging module is set to photovoltaic mode and the charging module is not charging the vehicle, the control module connects the electrical energy generated by the photovoltaic unit to the mains power through the inverter. Alternatively, if the input mode is selected as the energy storage battery mode and the charging module is not charging the vehicle, the charging module will connect the electrical energy in the energy storage battery to the mains power through the inverter. Alternatively, if the input mode of some charging modules is set to photovoltaic mode and the input mode of some charging modules is set to energy storage battery mode, and the charging modules are not charging the vehicle, the control module connects the electrical energy generated by the photovoltaic unit and the electrical energy stored in the energy storage battery to the mains power through the inverter.

15. The charging management method as described in claim 8, characterized in that, When the input mode of the charging module is set to vehicle mode, two vehicles can achieve vehicle-to-vehicle charging through the corresponding charging module.

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