Control method and system for charging and discharging device

Abstract

The invention relates to a management and control method and system for a charging and discharging device, and solves the problem that the participation objects of the charging and discharging device are an electric passenger vehicle and a power grid, and the power cannot be effectively supplied when a key load needs to be supplied with power, and the method comprises the steps: obtaining a selection instruction of a working mode of the charging and discharging device, the working modes comprise a grid-connected charging mode, a grid-connected discharging mode, an off-grid discharging mode and a bypass mode; executing the working mode of the charging and discharging device according to the working mode associated with the selection instruction; and monitoring electric quantity state change information of different target devices during execution of the working mode, and sending the electric quantity state change information to a terminal held by a person in charge, the target devices including a key load and a vehicle battery pack. The device has the advantages that off-grid discharging is supported, when the power grid is powered off, the grid-connected relay is disconnected, and electric energy of the vehicle battery pack can be provided for the key load through inversion and relay switching.

Description

Technical Field

[0001] The present invention relates to a charging and discharging device, and in particular to a control method and system for a charging and discharging device. Background Art

[0002] Current charging and discharging devices such as charging piles adopt a new generation of bidirectional charging and discharging machines, which support 11kW DC charging and 11kVA AC discharging, and can realize the energy transfer between electric passenger vehicles and the power grid. It can not only meet the daily charging needs of electric passenger vehicles, but also play the role of energy storage of the power battery unit of electric vehicles.

[0003] Regarding the above related technologies, the inventors found the following defects: The participants of the charging and discharging device are electric passenger vehicles and the power grid. When power supply is required for critical loads, effective power supply cannot be provided, and after the charging and discharging device executes according to the working mode, the specific power status of the devices associated with the charging and discharging device cannot be obtained in a timely and effective manner. Summary of the Invention

[0004] In order to support off-grid discharging, when the power grid is powered off, the grid-connected relay is disconnected, and the electric energy of the vehicle battery pack can be provided to the critical load through inversion and relay switching. The present application provides a control method and system for a charging and discharging device.

[0005] In a first aspect, the present application provides a control method for a charging and discharging device, adopting the following technical solution: A control method for a charging and discharging device includes: Obtaining a selection instruction for the working mode of the charging and discharging device, where the working mode includes grid-connected charging mode, grid-connected discharging mode, off-grid discharging mode, and bypass mode; Executing the working mode of the charging and discharging device according to the working mode associated with the selection instruction; Monitoring the change information of the power status of different target devices during the execution of the working mode and sending it to the terminal held by the person in charge, where the target devices include critical loads and vehicle battery packs.

[0006] By adopting the above technical solution, on the one hand, the working mode of the charging and discharging device can support off-grid discharging. When the power grid is powered off, the grid-connected relay is disconnected, and the electric energy of the vehicle battery pack can be provided to the critical load through inversion and relay switching. Moreover, for the charging and discharging device executing the working mode, it can be timely and effectively monitored whether it is working properly as a whole.

[0007] Optionally, the obtaining of the selection instruction for the working mode of the charging and discharging device includes: Obtaining the power required to be supplemented by the target device and the planned usage time; Analyze the maximum charging efficiency of the target device and the corresponding operating mode according to the correspondence between the preset operating mode of the charging and discharging device and the charging and discharging efficiency of the target device; Analyze whether the power to be supplemented for the target device can be fully charged before the planned usage time according to the power to be supplemented for the target device, the planned usage time, and the maximum charging efficiency of the target device; If so, use the operating mode corresponding to the maximum charging efficiency of the target device as the operating mode of the charging and discharging device recommended for the user to select; Obtain the operating mode of the charging and discharging device actually selected by the user.

[0008] By adopting the above technical solution, the most suitable operating mode for the target device can be effectively pushed to the user in a timely manner, so that the user can select the most appropriate operating mode for charging and discharging the target device.

[0009] Optionally, if the target device is a vehicle battery pack, the analysis and acquisition of the power to be supplemented for the target device are as follows: Obtain the vehicle travel plan time and destination; Analyze and obtain the power required to maintain the vehicle's travel according to the round-trip distance between the departure place and the destination and the preset power consumption per unit distance; Analyze and calculate the power to be supplemented for the vehicle according to the power required to maintain the vehicle's travel and the current power of the vehicle.

[0010] By adopting the above technical solution, the power that the vehicle still needs to be supplemented can be analyzed based on the vehicle travel situation and the unit power consumption.

[0011] Optionally, the acquisition of the preset power consumption per unit distance includes: Obtain the road section categories and distances included in the route from the departure place to the destination of the vehicle; Analyze the proportion of different types of road sections according to the distances corresponding to the road section categories; Analyze and determine the effective power consumption per unit distance according to the proportion of different types of road sections and the correspondence between the preset road section categories and the power consumption per unit distance.

[0012] By adopting the above technical solution, through the classification of road sections, the analysis of the power consumption per unit distance can be made more accurate, thereby improving the accuracy of the analysis of the power to be supplemented for the vehicle.

[0013] Optionally, if the target device is a critical load, the analysis and acquisition of the power to be supplemented for the target device are as follows: Obtain the planned working time period and the current power of the critical load; Analyze and obtain the power consumption required for the key load based on the unit power consumption of the key load at different working periods and the time period of the planned working of the key load; Analyze the amount of electricity required to replenish the critical loads based on the power consumption and current power required by the critical loads.

[0014] By adopting the above technical solution, the required amount of supplementary electricity for the key loads can be accurately analyzed and determined through the working conditions of the key load planning and the unit power consumption in the corresponding time period.

[0015] Optionally, based on the amount of electricity required to be replenished for the target device, the planned usage time, and the maximum charging efficiency of the target device, analyzing whether the amount of electricity required to be replenished for the target device can be fully charged before the planned usage time includes: According to the amount of electricity required to be replenished by different target devices and the maximum charging efficiency of the target devices, the corresponding time required for different target devices to complete the required replenishment of electricity is analyzed and determined; According to the corresponding time taken by different target devices to complete the required power replenishment, the overall time taken is obtained by statistics; According to the current time node and the overall time consumption, the time node for the target device to complete charging of the required power is calculated. If the time node for completing charging is earlier than the planned usage time, it is judged that the target device can be charged with the required power before the planned usage time. Otherwise, it is judged that the target device cannot be charged with the required power before the planned usage time.

[0016] By adopting the above technical solution, the time required for different target devices to complete the required power charging can be effectively controlled.

[0017] Optionally, according to the amount of electricity required to be replenished for different target devices and the maximum charging efficiency of the target devices, the corresponding time required to complete the replenishment of the required electricity for different target devices is analyzed and determined, including: Analyze whether the working mode corresponding to the target device's highest charging efficiency involves the power of other target devices; If yes, it is determined that the target device involved is a vehicle battery pack, and the other target device is a critical load. According to the required replenishment power of the critical load and the required replenishment power of the vehicle battery pack, the actual amount of power required to be replenished for the vehicle battery pack is calculated; Analyze and determine the charging time of the vehicle battery pack based on the actual amount of electricity required to be replenished by the vehicle battery pack and the maximum charging efficiency of the vehicle battery pack. Analyze and determine the charging time of the key loads based on the amount of electricity required to be replenished by the key loads and the maximum charging efficiency of the key loads. If not, the charging time of different target devices is analyzed according to the amount of electricity required to be replenished by different target devices and the maximum charging efficiency of the target devices.

[0018] By adopting the above technical solution, it is fully considered that the working modes matching the charging power may be associated with multiple target devices. In this case, it is necessary to further analyze the charging time to improve the overall time consumption.

[0019] Optionally, monitoring the power status change information of different target devices during the execution of the working mode and sending it to the terminal held by the person in charge includes: Obtaining the power status change information of different target devices and analyzing the actual charging power of different target devices; According to the actual charging power of different target devices obtained by the analysis and the charging power matching the target devices, analyze whether the difference between the actual charging power of different target devices and the matching charging power is within the preset difference range; If not, obtain the target devices with differences not within the preset difference range and switch their current working modes, select the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target devices, and execute the corresponding working mode.

[0020] By adopting the above technical solution, the monitoring of whether the target devices work properly after executing the working mode is realized. When it is found that there are problems with the target devices during the monitoring, the working mode will be switched in time.

[0021] Optionally, it further includes the steps after selecting the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target devices and executing the corresponding working mode, which are specifically as follows: Analyze whether the difference between the actual charging power of the target devices and the charging power matching the target devices is within the preset difference range after executing the subsequent working mode; If so, judge that there are problems with the associated part of the previous working mode and send the corresponding problems to the terminal held by the person in charge; If not, judge that there are problems with the target devices, and according to the corresponding relationship between the time gap between the time node when it is judged that there are problems with the target devices and the planned usage time and the time difference range and the notification method, analyze and determine the notification method, and send the corresponding problems to the terminal held by the person in charge according to the analyzed and determined notification method.

[0022] By adopting the above technical solution, it is possible to report in time the problems that still exist after the target devices switch the working mode, so as to facilitate the staff to arrange maintenance in time.

[0023] In a second aspect, the present application provides a control system for a charge and discharge device, adopting the following technical solution: A control system for a charge and discharge device, including a memory, a processor, and a program stored on the memory and executable on the processor. When the program is loaded and executed by the processor, it can implement the control method of the charge and discharge device as described in the first aspect.

[0024] By adopting the above technical solutions, on the one hand, the working mode of the charge and discharge device supports off-grid discharging. When the power grid is powered off, the grid-connected relay disconnects, and the electric energy of the vehicle battery pack can be provided to the critical load through inversion and relay switching. Moreover, for the charge and discharge device operating in the working mode, it can effectively monitor whether it is working properly in a timely manner. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall process of a control method for a charge and discharge device according to an embodiment of the present application.

[0026] Figure 2 It is a circuit schematic diagram of the charge and discharge device involved in the present application.

[0027] Figure 3 It is a schematic diagram of the acquisition process of a selection instruction for the working mode of a charge and discharge device according to another embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of the analysis and acquisition process of the amount of electricity to be supplemented for a target device if the target device is a vehicle battery pack according to another embodiment of the present application.

[0029] Figure 5 It is a schematic diagram of the acquisition process of the power consumption per preset unit distance according to another embodiment of the present application.

[0030] Figure 6 It is a schematic diagram of the analysis and acquisition process of the amount of electricity to be supplemented for a target device if the target device is a critical load according to another embodiment of the present application.

[0031] Figure 7 It is a schematic diagram of the process of analyzing whether the amount of electricity to be supplemented for a target device can be fully charged before the planned usage time according to the amount of electricity to be supplemented for the target device, the planned usage time, and the maximum charging efficiency of the target device according to another embodiment of the present application.

[0032] Figure 8 It is a schematic diagram of the process of analyzing and determining the corresponding time required for different target devices to complete the supplementation of the required amount of electricity according to the amount of electricity to be supplemented for different target devices and the maximum charging efficiency of the target devices according to another embodiment of the present application.

[0033] Figure 9 It is a schematic diagram of the process of monitoring the change information of the power status of different target devices during the execution of the working mode and sending it to the terminal held by the person in charge according to another embodiment of the present application.

[0034] Figure 10 It is a schematic flowchart of another embodiment of the present application, which is to select the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target device and execute the steps after the corresponding working mode. Detailed implementation manners

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] Refer to Figure 1 , a control method for a charging and discharging device disclosed in the present application, includes: Step S100, obtaining a selection instruction for the working mode of the charging and discharging device.

[0037] The working modes include grid-connected charging mode, grid-connected discharging mode, off-grid discharging mode, and bypass mode.

[0038] Refer to Figure 2 for a further introduction to the specific working modes, which are as follows: ① Grid-connected charging mode: Grid-side electric energy passes through Figure 1 RLY3 in , flows through RLY2, flows through RLY1 to the OBC or the DC charging module, and then to the in-vehicle PACK; ② Grid-connected discharging mode: The reverse energy flow mode of mode ①; ③ Off-grid discharging mode: RLY2 and RLY3 are in the off state, and the electric energy flows from the in-vehicle PACK to the OBC or the charging and discharging module to be converted into alternating current, and then passes through RLY1 to supply power to the critical load; ④ Bypass mode: RLY1 is off, RLY2 and RLY3 are closed, and the power grid supplies power to the critical load (it can be understood that the vehicle and the charging pile are not connected at this time). Among them, OBC is the on-board charger, and RLY is the relay.

[0039] Step S200, executing the working mode of the charging and discharging device according to the working mode associated with the selection instruction.

[0040] Step S300, monitoring the change information of the power status of different target devices during the execution of the working mode and sending it to the terminal held by the person in charge. The target devices include the critical load and the vehicle battery pack.

[0041] Among them, the terminal held by the person in charge can be a mobile phone or a computer, or other terminal devices. The critical load can be lighting, a refrigerator, etc.

[0042] In Figure 1 step S100 of , further considering that the acquisition of the selection instruction for the working mode of the charging and discharging device can also consider making corresponding recommendations to the person in charge. For specific details, reference can be made to Figure 3 the embodiments shown for a detailed description.

[0043] Refer to Figure 3 , the acquisition of the selection instruction for the working mode of the charging and discharging device includes: Step S110, obtain the power to be supplemented for the target device and the planned usage time.

[0044] Among them, the power to be supplemented for the target device and the planned usage time can be queried and obtained from a preset database storing the power to be supplemented for the target device and the planned usage time.

[0045] Step S120, according to the corresponding relationship between the preset working mode of the charging and discharging device and the charging and discharging efficiency of the target device, analyze the highest charging efficiency of the target device and the corresponding working mode.

[0046] Among them, the analysis and acquisition of the highest charging efficiency of the target device and the corresponding working mode are as follows: taking the working mode of the charging and discharging device as the query object, query and obtain the highest charging efficiency of the target device and the corresponding working mode from a preset database storing the corresponding relationship between the preset working mode of the charging and discharging device and the charging and discharging efficiency of the target device.

[0047] Step S130, according to the power to be supplemented for the target device, the planned usage time, and the highest charging efficiency of the target device, analyze whether the power to be supplemented for the target device can be fully charged before the planned usage time.

[0048] Step S140, if it is yes, then use the working mode corresponding to the highest charging efficiency of the target device as the working mode of the charging and discharging device recommended for the user to select.

[0049] Step S150, obtain the working mode of the charging and discharging device actually selected by the user.

[0050] In Figure 3 step S110, it should also be considered that the target device is a vehicle battery pack. At this time, the analysis of the power to be supplemented for the target device can be described in detail with reference to Figure 4 the embodiments shown.

[0051] Referring to Figure 4 , if the target device is a vehicle battery pack, the analysis and acquisition of the power to be supplemented for the target device are as follows: Step S111, obtain the vehicle travel plan time and the destination.

[0052] Among them, the vehicle travel plan time and the destination can be queried and obtained from a preset database storing the vehicle travel plan time and the destination.

[0053] Step S112, according to the round-trip distance between the departure place and the destination and the preset power consumption per unit distance, analyze and obtain the power required to maintain the vehicle to complete the trip.

[0054] Among them, the analysis of obtaining the power to maintain the vehicle to complete the trip is as follows: Multiply the round-trip distance between the departure place and the destination by the power consumption per unit distance preset, and the obtained product is the power to maintain the vehicle to complete the trip.

[0055] Step S113, according to the obtained power to maintain the vehicle to complete the trip and the current power of the vehicle, analyze and calculate to obtain the power that the vehicle needs to supplement.

[0056] In Figure 4 In step S112, further considering that the power consumption per unit distance is affected by the road section and the power consumption is also different, further analysis is required. Specifically, reference can be made to Figure 5 the embodiments shown for detailed description.

[0057] Refer to Figure 5 , the obtaining of the preset power consumption per unit distance includes: Step Sa00, obtain the road section categories and distances included in the route of the vehicle from the departure place to the destination.

[0058] Step Sb00, according to the distances corresponding to the road section categories, analyze the proportions of different category road sections.

[0059] Among them, the analysis of the proportions of different category road sections is as follows: Take the distance of the road sections of the same category as the dividend one by one, and take the sum of the distances of all road sections as the divisor, and the obtained quotient is the proportion of the same type of road section.

[0060] Step Sc00, according to the proportions of different category road sections and the corresponding relationship between the preset road section categories and the power consumption per unit distance, analyze and determine the effective power consumption per unit distance.

[0061] In Figure 3 In step S110, the situation where the target device is a critical load should also be considered. At this time, the analysis of the power that the target device needs to supplement can be referred to Figure 6 the embodiments shown for detailed description.

[0062] Refer to Figure 6 , if the target device is a critical load, the analysis of obtaining the power that the target device needs to supplement is as follows: Step S11a, obtain the planned working time period and the current power of the critical load.

[0063] Among them, the planned working time period of the critical load can be queried and obtained from a preset database storing the planned working time period of the critical load, and the current power can be detected and obtained according to the power monitoring device of the corresponding critical device.

[0064] Step S11b: Analyze and obtain the power consumption required for the critical load based on the unit power consumption of the critical load during different time periods and the planned working time period of the critical load.

[0065] Among them, the analysis and acquisition of the power consumption required for the critical load are as follows: First, query and obtain the unit power consumption during the planned time period from the database of the unit power consumption of the critical load during different time periods, and then multiply the unit power consumption 1 by the specific time interval of the planned working time period. The obtained product is the power consumption required for the critical load.

[0066] Step S11c: Analyze the power that needs to be supplemented for the critical load based on the power consumption required for the critical load and the current power.

[0067] Among them, the analysis of the power that needs to be supplemented for the critical load is as follows: Subtract the current power from the power consumption required for the critical load. The obtained difference is the power that needs to be supplemented for the critical load.

[0068] Refer to Figure 7 , analyze whether the power that needs to be supplemented for the target device can be fully charged before the planned usage time based on the power that needs to be supplemented for the target device, the planned usage time, and the maximum charging efficiency of the target device, including: Step S131: Analyze and determine the corresponding time required for different target devices to complete the supplementation of the power that needs to be supplemented based on the power that needs to be supplemented for different target devices and the maximum charging efficiency of the target device.

[0069] Step S132: Statistically obtain the overall time required based on the corresponding time required for different target devices to complete the supplementation of the power that needs to be supplemented.

[0070] Step S133: Deduce the time node when the power that needs to be supplemented for the target device is fully charged based on the current time node and the overall time required. If the time node when the power is fully charged is earlier than the planned usage time, it is determined that the power that needs to be supplemented for the target device can be fully charged before the planned usage time; otherwise, it is determined that the power that needs to be supplemented for the target device cannot be fully charged before the planned usage time.

[0071] In Figure 7 Step S131, it is also necessary to further consider whether the working mode is related to the target device. In this case, the corresponding time required will be affected. Therefore, further analysis is required. For specific details, refer to Figure 8 the embodiments shown for a detailed description.

[0072] Refer to Figure 8 , analyze and determine the corresponding time required for different target devices to complete the supplementation of the power that needs to be supplemented based on the power that needs to be supplemented for different target devices and the maximum charging efficiency of the target device, including: Step S131.1: Analyze whether the operating mode corresponding to the maximum charging efficiency of the target device involves the remaining target device's power. If yes, execute Step S131.2; if no, execute Step S131.4.

[0073] Step S131.2: Determine that the target device involved is the vehicle battery pack and the other target device is the critical load. Calculate and obtain the actual power that needs to be replenished for the vehicle battery pack based on the power that needs to be replenished for the critical load and the power that needs to be replenished for the vehicle battery pack.

[0074] Step S131.3: Analyze and determine the charging time of the vehicle battery pack based on the actual power that needs to be replenished for the vehicle battery pack and the maximum charging efficiency of the vehicle battery pack. Analyze and determine the charging time of the critical load based on the power that needs to be replenished for the critical load and the maximum charging efficiency of the critical load.

[0075] Among them, the analysis and determination of the charging time of the vehicle battery pack are as follows: Use the actual power that needs to be replenished for the vehicle battery pack as the dividend and the maximum charging efficiency of the vehicle battery pack as the divisor. The quotient obtained is the charging time of the vehicle battery pack. Similarly, the analysis and determination of the charging time of the critical load are as follows: Use the actual power that needs to be replenished for the critical load as the dividend and the maximum charging efficiency of the critical load as the divisor. The quotient obtained is the charging time of the critical load.

[0076] Step S131.4: Analyze the charging time of different target devices according to the power that needs to be replenished for different target devices and the maximum charging efficiency of the target devices.

[0077] Refer to Figure 9 , monitor the power status change information of different target devices during the execution of the operating mode and send it to the terminal held by the person in charge, including: Step SA00: Obtain the power status change information of different target devices and analyze the actual charging power of different target devices.

[0078] Step SB00: Analyze whether the difference between the actual charging power of different target devices and the charging power matched by the target devices is within the preset difference range according to the actual charging power of different target devices analyzed and obtained and the charging power matched by the target devices.

[0079] Among them, the preset difference can be set as needed.

[0080] Step SC00: If not, obtain the target device with a difference not within the preset difference range and switch its current operating mode. Select the operating mode with the highest charging efficiency among the remaining operating modes as the operating mode of the corresponding target device and execute the corresponding operating mode.

[0081] Refer toFigure 10 A control method for a charging and discharging device further includes selecting the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target device, and performing the steps after the corresponding working mode, specifically as follows: Step SD00: Analyze whether the difference between the actual charging power of the target device and the charging power matched by the target device after performing the subsequent working mode is within the preset difference range. If yes, perform step SE00; if not, perform step SF00.

[0082] Step SE00: Determine that there is a problem with the associated part of the previous working mode, and send the corresponding problem to the terminal held by the person in charge.

[0083] Step SF00: Determine that there is a problem with the target device, and analyze and determine the notification method according to the corresponding relationship between the time difference between the time node when it is determined that there is a problem with the target device and the planned usage time, the time difference range it falls into, and the notification method, and send the corresponding problem to the terminal held by the person in charge according to the analyzed and determined notification method.

[0084] Based on the same inventive concept, an embodiment of the present invention provides a control system for a charging and discharging device, including a memory and a processor. The memory stores a program that can be run on the processor to implement Figures 1 to 10 any of the methods.

[0085] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

[0086] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A control method for a charge and discharge device, characterized in that, Including: Obtain a selection instruction for the operating mode of the charging and discharging device, where the operating modes include grid-connected charging mode, grid-connected discharging mode, off-grid discharging mode, and bypass mode; Execute the operating mode of the charging and discharging device according to the operating mode associated with the selection instruction; Monitor the change information of the power status of different target devices during the execution of the operating mode and send it to the terminal held by the person in charge. The target devices include critical loads and vehicle battery packs.

2. The control method of a charge and discharge device according to claim 1, wherein The obtaining of the selection instruction for the operating mode of the charging and discharging device includes: Obtain the amount of power to be supplemented by the target device and the planned usage time; According to the corresponding relationship between the preset operating mode of the charging and discharging device and the charging and discharging efficiency of the target device, analyze the highest charging efficiency of the target device and the corresponding operating mode; According to the amount of power to be supplemented by the target device, the planned usage time, and the highest charging efficiency of the target device, analyze whether the amount of power to be supplemented by the target device can be fully charged before the planned usage time; If so, use the operating mode corresponding to the highest charging efficiency of the target device as the operating mode of the charging and discharging device recommended for the user to select; Obtain the actual operating mode of the charging and discharging device selected by the user.

3. The control method of a charge and discharge device according to claim 2, characterized in that, If the target device is a vehicle battery pack, the analysis and obtaining of the amount of power to be supplemented by the target device are as follows: Obtain the vehicle travel plan time and the destination; According to the round-trip distance between the departure place and the destination and the preset power consumption per unit distance, analyze and obtain the power required to maintain the vehicle's travel; According to the power required to maintain the vehicle's travel obtained and the current power of the vehicle, analyze and calculate the amount of power to be supplemented by the vehicle.

4. The control method of a charge and discharge device according to claim 3, characterized in that, The obtaining of the preset power consumption per unit distance includes: Obtain the road section categories and distances included in the route from the departure place to the destination of the vehicle; According to the distances corresponding to the road section categories, analyze the proportion of different types of road sections; According to the proportion of different types of road sections and the corresponding relationship between the road section categories and the power consumption per unit distance preset, analyze and determine the effective power consumption per unit distance.

5. The control method of a charge and discharge device according to claim 2, characterized in that, If the target device is a critical load, the analysis and obtaining of the amount of power to be supplemented by the target device are as follows: Obtain the planned working time period and the current power of the critical load; According to the power consumption per unit during different time periods of the critical load and the planned working time period of the critical load, analyze and obtain the power consumption required by the critical load; According to the power consumption required by the critical load and the current power, analyze the amount of power to be supplemented by the critical load.

6. The control method of a charge and discharge device according to any one of claims 2 to 5, characterized in that, According to the amount of power to be supplemented by the target device, the planned usage time, and the highest charging efficiency of the target device, analyzing whether the amount of power to be supplemented by the target device can be fully charged before the planned usage time includes: According to the amount of power to be supplemented by different target devices and the highest charging efficiency of the target device, analyze and determine the corresponding time required for different target devices to complete the supplementation of the required amount of power; According to the corresponding time required for different target devices to complete the supplementation of the required amount of power, statistically obtain the overall time; Based on the current time node and the overall time consumption, calculate the time node when the target device needs to replenish the required power to complete charging. If the time node for completing charging is earlier than the planned usage time, it is determined that the power required to be replenished by the target device can be charged before the planned usage time; otherwise, it is determined that the power required to be replenished by the target device cannot be charged before the planned usage time.

7. The control method of a charge and discharge device according to claim 6, wherein Based on the power required to be replenished by different target devices and the maximum charging efficiency of the target devices, analyze and determine the corresponding time consumption for different target devices to complete the replenishment of the required power, including: Analyze whether the working mode corresponding to the maximum charging efficiency of the target device involves the power of other target devices; If so, determine that the target device involved is the vehicle battery pack and the other target device is the critical load. Calculate and obtain the actual power that the vehicle battery pack needs to replenish according to the power required to be replenished by the critical load and the power required to be replenished by the vehicle battery pack; Based on the actual power that the vehicle battery pack needs to replenish and the maximum charging efficiency of the vehicle battery pack, analyze and determine the charging time consumption of the vehicle battery pack. Based on the power required to be replenished by the critical load and the maximum charging efficiency of the critical load, analyze and determine the charging time consumption of the critical load; If not, analyze the charging time consumption of different target devices according to the power required to be replenished by different target devices and the maximum charging efficiency of the target devices.

8. A control method for a charge-discharge device according to claim 1, characterized in that Monitoring the power state change information of different target devices during the execution of the working mode and sending it to the terminal held by the person in charge includes: Obtain the power state change information of different target devices and analyze the actual charging power of different target devices; Based on the actual charging power of different target devices obtained by the analysis and the charging power matched by the target devices, analyze whether the difference between the actual charging power of different target devices and the matched charging power is within the preset difference range; If not, obtain the target device with the difference not within the preset difference range and switch its current working mode. Select the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target device and execute the corresponding working mode.

9. The control method of a charge and discharge device according to claim 1, characterized in that, It also includes the steps after selecting the working mode with the highest charging efficiency among the remaining working modes as the working mode of the corresponding target device and executing the corresponding working mode, specifically as follows: Analyze whether the execution of the subsequent working mode makes the difference between the actual charging power of the target device and the charging power matched by the target device within the preset difference range; If so, determine that there is a problem with the associated part of the previous working mode and send the corresponding problem to the terminal held by the person in charge; If not, determine that there is a problem with the target device, and analyze and determine the notification method according to the time gap between the time node when it is determined that there is a problem with the target device and the planned usage time, the time difference range it falls into, and the corresponding relationship with the notification method, and send the corresponding problem to the terminal held by the person in charge according to the analyzed and determined notification method.

10. A control system for a charge and discharge device, characterized in that, It includes a memory, a processor, and a program stored on the memory and executable on the processor. When the program is loaded and executed by the processor, it can implement a control method for a charge and discharge device as described in any one of claims 1 to 9.

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