Microgrid charging and discharging management method and device, grid control equipment and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a micro-grid charging and discharging management method and device, power grid control equipment and a vehicle, and the method comprises the steps: recognizing the historical operation data of power batteries of all vehicles connected with charging and discharging piles in a micro-grid target range, and recognizing the battery voltage difference in the historical operation data of the power batteries; if the battery voltage difference is larger than the preset voltage difference, the corresponding vehicle is controlled to enter a first charging and discharging mode, and the first charging and discharging mode is used for balancing the voltage difference of the power battery; if the battery voltage difference is smaller than or equal to the predicted voltage difference, the corresponding vehicle is controlled to enter a second charging and discharging mode, actual operation data of a power battery of the vehicle entering the second charging and discharging mode are collected, and a reference database is established or the service life of the power battery of the vehicle is predicted according to the actual operation data, the second charge-discharge mode and the first charge-discharge mode are different charge-discharge modes. Therefore, the problem that comprehensive management of vehicle charging and discharging cannot be achieved in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a microgrid charging and discharging management method, device, grid control equipment and vehicle. Background Art

[0002] The popularization of electric vehicles requires not only efficient charging facilities, but also intelligent charging and discharging management systems to optimize battery use and maintenance. Traditional charging piles mainly focus on charging functions, but ignore the comprehensive monitoring and management of battery status. With the increase in the number of electric vehicles, how to achieve two-way energy flow between vehicles and power grids, namely V2G (Vehicle-to-Grid) technology, has become a new research hotspot. V2G technology can not only improve energy utilization efficiency, but also balance the power grid load and improve the stability of the power grid by using electric vehicle batteries as energy storage devices.

[0003] The existing charging and discharging strategy of charging piles mainly relies on V2G technology to achieve discharge from vehicles to the power grid. Specifically, the electric energy is charged into the battery of the electric vehicle through the charging pile. Under certain conditions, the electric vehicle can release the electric energy in the battery to the power grid through the charging pile. Although it can achieve the two-way movement of energy to a certain extent, it has not achieved comprehensive monitoring of the battery status of the vehicle and comprehensive management of charging and discharging. Summary of the invention

[0004] The present application provides a microgrid charging and discharging management method, device, grid control equipment and vehicle to solve the problem that the related technology cannot achieve comprehensive management of vehicle charging and discharging.

[0005] The first aspect of the present application provides a microgrid charging and discharging management method, comprising the following steps: identifying the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles within the target range of the microgrid, and identifying the battery voltage difference in the historical operation data of the power batteries; if the battery voltage difference is greater than the preset voltage difference, controlling the corresponding vehicle to enter a first charging and discharging mode, wherein the first charging and discharging mode is used to balance the voltage difference of the power batteries; if the battery voltage difference is less than or equal to the predicted voltage difference, controlling the corresponding vehicle to enter a second charging and discharging mode, collecting the actual operation data of the power batteries of the vehicles entering the second charging and discharging mode, establishing a reference database or predicting the power battery life of the vehicles according to the actual operation data, wherein the second charging and discharging mode is a different charging and discharging mode from the first charging and discharging mode.

[0006] Optionally, a reference database is established or the vehicle's power battery life is predicted based on actual operating data, including: identifying the number of charge and discharge cycles in historical operating data; if the number of charge and discharge cycles is less than or equal to a preset number, establishing a reference database based on the actual operating data; if the number of charge and discharge cycles is greater than the preset number, predicting the vehicle's power battery life based on the reference database and the actual operating data.

[0007] Optionally, predicting the vehicle's power battery life based on a reference database and actual operating data includes: identifying the data type of each data in the actual operating data; determining the data weight of the corresponding data based on the data type; weighting all data based on the data type and the corresponding data weight; and predicting the vehicle's power battery life based on the weighted data and the reference database.

[0008] Optionally, the first charge and discharge mode includes a first charge mode and a first discharge mode, wherein the first charge mode is charging cells in the power battery with a voltage less than a preset voltage, and the first discharge mode is discharging cells in the power battery with a voltage greater than a preset voltage.

[0009] Optionally, the second charge and discharge mode includes a second charging mode and a second discharging mode, and controls the corresponding vehicle to enter the second charge and discharge mode, including: identifying the number of charge and discharge cycles and the current SOC in the historical operation data; if the number of charge and discharge cycles is less than or equal to the preset number, controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC; if the number of charge and discharge cycles is greater than the preset number, controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid.

[0010] Optionally, controlling the corresponding vehicle to enter a second charging mode or a second discharging mode according to the current SOC includes: generating a mode recommendation prompt according to the current SOC, wherein, if the current SOC is less than a first preset value, the mode recommendation prompt is the second charging mode, if the current SOC is greater than the second preset value, the mode recommendation prompt is the second discharge mode, if the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, the mode recommendation prompt is the second charging mode and the second discharge mode, and the second preset value is greater than the first preset value; identifying the target selection intention of the user in responding to the mode recommendation prompt, and controlling the corresponding vehicle to enter the second charging mode or the second discharge mode according to the target selection intention.

[0011] Optionally, the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid, including: determining the corresponding vehicle as a charging-allowed vehicle or a discharging-allowed vehicle according to the target selection intention; obtaining the power consumption of the power-consuming equipment and the power generation of the power-generating equipment of the power grid, if the power consumption is greater than the power generation, controlling the discharging vehicle to enter the second discharging mode, and if the power consumption is less than the power generation, controlling the charging vehicle to enter the second charging mode.

[0012] A second aspect of the present application provides a microgrid charge and discharge management device, including: an identification module, used to identify the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles within the target range of the microgrid, and identify the battery voltage difference in the historical operation data of the power batteries; a first control module, used to control the corresponding vehicle to enter a first charge and discharge mode if the battery voltage difference is greater than a preset voltage difference, wherein the first charge and discharge mode is used to balance the voltage difference of the power battery; a second control module, used to control the corresponding vehicle to enter a second charge and discharge mode if the battery voltage difference is less than or equal to the preset voltage difference, collect the actual operation data of the power battery of the vehicle entering the second charge and discharge mode, establish a reference database or predict the power battery life of the vehicle based on the actual operation data, wherein the second charge and discharge mode is different from the first charge and discharge mode.

[0013] Optionally, the second control module is further used to: identify the number of charge and discharge cycles in historical operating data; if the number of charge and discharge cycles is less than or equal to a preset number, establish a reference database based on actual operating data; if the number of charge and discharge cycles is greater than the preset number, predict the vehicle's power battery life based on the reference database and actual operating data.

[0014] Optionally, the second control module is further used to: identify the data type of each data in the actual operating data; determine the data weight of the corresponding data according to the data type; perform weighted processing on all data according to the data type and the data weight; and predict the vehicle's power battery life based on the weighted data and a reference database.

[0015] Optionally, the first charge and discharge mode includes a first charge mode and a first discharge mode, wherein the first charge mode is charging cells in the power battery with a voltage less than a preset voltage, and the first discharge mode is discharging cells in the power battery with a voltage greater than a preset voltage.

[0016] Optionally, the second charge and discharge mode includes a second charging mode and a second discharging mode, and the second control module is further used to: identify the number of charge and discharge cycles and the current SOC in the historical operation data; if the number of charge and discharge cycles is less than or equal to a preset number, control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC; if the number of charge and discharge cycles is greater than the preset number, control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid.

[0017] Optionally, the second control module is further used to: generate a mode recommendation prompt based on the current SOC, wherein if the current SOC is less than a first preset value, the mode recommendation prompt is the second charging mode, if the current SOC is greater than the second preset value, the mode recommendation prompt is the second discharge mode, if the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, then the mode recommendation prompt is the second charging mode and the second discharge mode, and the second preset value is greater than the first preset value; identify the user's target selection intention in responding to the mode recommendation prompt, and control the corresponding vehicle to enter the second charging mode or the second discharge mode according to the target selection intention.

[0018] Optionally, the second control module is further used to: determine whether the corresponding vehicle is a charging-allowed vehicle or a discharging-allowed vehicle based on the target selection intention; obtain the power consumption of the power-consuming equipment and the power generation of the power generation equipment in the power grid, and if the power consumption is greater than the power generation, control the discharging vehicle to enter the second discharging mode; if the power consumption is less than the power generation, control the charging vehicle to enter the second charging mode.

[0019] The third aspect of the present application provides a power grid control device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement a microgrid charging and discharging management method as described in the above embodiment.

[0020] A fourth aspect of the present application provides a vehicle connected to a charging and discharging pile. The power grid control device of the above embodiment controls the charging and discharging pile to manage the charging and discharging of the vehicle.

[0021] Therefore, this application includes the following beneficial effects:

[0022] The embodiment of the present application can manage the charging and discharging of all vehicles within the target range of the microgrid, and can obtain the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles in the microgrid. According to the battery voltage difference in the historical operation data of the power battery, the charging and discharging mode of the corresponding vehicle is determined, and then the corresponding vehicle is charged or discharged according to the charging and discharging mode. Specifically, when the battery voltage difference is large, it is the first charging and discharging mode to balance the voltage difference of the power battery. When the battery voltage difference is small, the vehicle is controlled to charge and discharge normally, which is the second charging and discharging mode. According to the actual operation data, a reference database is established or the power battery life of the vehicle is predicted, thereby realizing the comprehensive management of vehicle charging and discharging within a certain range of the microgrid and the comprehensive monitoring of the vehicle power battery, which can effectively maintain the service life of the vehicle power battery. Therefore, the technical problems such as the inability to realize the comprehensive management of vehicle charging and discharging in the related technology are solved.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A flowchart of a microgrid charging and discharging management method provided according to an embodiment of the present application;

[0026] Figure 2 A specific flow chart of a microgrid charging and discharging management method provided according to an embodiment of the present application;

[0027] Figure 3 This is an example diagram of a microgrid charge and discharge management device provided according to an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a power grid control device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] The following describes the microgrid charging and discharging management method, device, grid control equipment and vehicle of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the existing charging pile charging and discharging strategy mentioned in the above background technology can realize the bidirectional movement of energy to a certain extent, but does not realize the comprehensive monitoring of the battery status of the vehicle and the comprehensive management of charging and discharging, the present application provides a microgrid charging and discharging management method, in which all vehicles within the target range of the microgrid can be managed for charging and discharging, and the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles in the microgrid can be obtained. According to the battery pressure difference in the historical operation data of the power battery, the charging and discharging mode of the corresponding vehicle is determined, and then the corresponding vehicle is charged or discharged according to the charging and discharging mode. Specifically, when the battery pressure difference is large, it is the first charging and discharging mode, balancing the pressure difference of the power battery, and when the battery pressure difference is small, the vehicle is controlled to charge and discharge normally, which is the second charging and discharging mode. According to the actual operation data, a reference database is established or the power battery life of the vehicle is predicted, thereby realizing the comprehensive management of vehicle charging and discharging within a certain range of the microgrid and the comprehensive monitoring of the vehicle power battery, which can effectively maintain the service life of the vehicle power battery. Thus, the problem that the comprehensive management of vehicle charging and discharging cannot be realized in the related technology is solved.

[0031] Specifically, Figure 1 A flow chart of a microgrid charging and discharging management method provided in an embodiment of the present application.

[0032] like Figure 1 As shown, the microgrid charging and discharging management method includes the following steps:

[0033] In step S101, historical operation data of power batteries of all vehicles connected to charging and discharging piles within a target range in a microgrid are identified, and battery voltage differences in the historical operation data of the power batteries are identified.

[0034] Among them, microgrid is a small power grid.

[0035] It can be understood that the embodiments of the present application can identify the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles within the target range in the microgrid, and identify the battery pressure difference in the historical operation data of the power batteries, so as to subsequently perform charging and discharging management on the vehicles in the microgrid.

[0036] In step S102, if the battery pressure difference is greater than the preset pressure difference, the corresponding vehicle is controlled to enter the first charge and discharge mode, wherein the first charge and discharge mode is used to balance the pressure difference of the power battery.

[0037] The first charge and discharge mode includes a first charge mode and a first discharge mode, wherein the first charge mode is charging a cell with a voltage less than a preset voltage in the power battery, and the first discharge mode is discharging a cell with a voltage greater than a preset voltage in the power battery.

[0038] Among them, the preset voltage difference and the preset voltage can be set according to specific circumstances, and no specific limitation is made to this.

[0039] Since a large battery voltage difference exists between the battery cells of the power battery, some cells may age prematurely or their performance may deteriorate, thereby affecting the performance and life of the entire battery pack. Therefore, the embodiment of the present application can control the corresponding vehicle to enter the first charge and discharge mode when the battery voltage difference is greater than the preset voltage difference, and perform balanced maintenance on the battery to ensure consistency and stability between the battery cells, wherein the first charging mode is charging the cells in the power battery with a voltage less than a preset voltage, and the first discharging mode is discharging the cells in the power battery with a voltage greater than the preset voltage.

[0040] In addition, it should be noted that the embodiment of the present application can control the vehicle to enter the second charging and discharging mode after the corresponding vehicle completes the first charging and discharging mode, that is, after the voltage difference of the power battery is balanced.

[0041] In step S103, if the battery voltage difference is less than or equal to the preset voltage difference, the corresponding vehicle is controlled to enter the second charge and discharge mode, the actual operation data of the power battery of the vehicle entering the second charge and discharge mode is collected, and a reference database is established or the power battery life of the vehicle is predicted based on the actual operation data, wherein the second charge and discharge mode is different from the first charge and discharge mode.

[0042] Among them, the second charge and discharge mode is different from the first charge and discharge mode. The first charge and discharge mode is used to balance the battery cell voltage, and can independently charge and discharge individual battery cells to improve the consistency and safety of the battery. The second charge and discharge mode is mainly aimed at the evaluation and prediction of the overall battery performance. It uniformly operates the entire power battery under standardized working conditions, focusing on long-term performance tracking, life prediction and other operations based on this information.

[0043] It can be understood that in the embodiment of the present application, when the battery pressure difference is less than or equal to the preset pressure difference, it indicates that there is no cell inconsistency in the power battery at this time, then the corresponding vehicle is controlled to enter the second charge and discharge mode, and the actual power battery operation data of the vehicle entering the second charge and discharge mode is collected, so as to establish a reference database or predict the power battery life of the vehicle based on the actual operation data, so as to realize the comprehensive and integrated management of the vehicle power battery.

[0044] In an embodiment of the present application, the second charge and discharge mode includes a second charging mode and a second discharging mode, and controls the corresponding vehicle to enter the second charge and discharge mode, including: identifying the number of charge and discharge cycles and the current SOC (State of Charge) in the historical operation data; if the number of charge and discharge cycles is less than or equal to the preset number, the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC; if the number of charge and discharge cycles is greater than the preset number, the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid.

[0045] Among them, the operating data includes the total voltage of the power battery, single cell voltage, temperature, SOC, number of charge and discharge cycles, battery pressure difference, etc.; the preset number of times can be set according to the specific situation, such as 5 times or 6 times, and there is no specific limitation on this.

[0046] It can be understood that the embodiments of the present application can indicate that the power battery of the vehicle is almost a new battery when the number of charge and discharge cycles is less than or equal to a preset number, and can control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC, so as to collect the actual operating data of the vehicle and facilitate the subsequent establishment of a reference database for the vehicle (i.e., a database of standard factory batteries). When the number of charge and discharge cycles is greater than the preset number, the vehicle can be controlled to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging requirements of the power grid, thereby combining the power battery of the vehicle with the power grid requirements to achieve optimized resource allocation.

[0047] In an embodiment of the present application, the corresponding vehicle is controlled to enter a second charging mode or a second discharging mode according to the current SOC, including: generating a mode recommendation prompt according to the current SOC, wherein if the current SOC is less than a first preset value, the mode recommendation prompt is the second charging mode, if the current SOC is greater than the second preset value, the mode recommendation prompt is the second discharge mode, if the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, the mode recommendation prompt is the second charging mode and the second discharge mode, and the second preset value is greater than the first preset value; identifying the user's target selection intention in responding to the mode recommendation prompt, and controlling the corresponding vehicle to enter the second charging mode or the second discharge mode according to the target selection intention.

[0048] The first preset value and the second preset value can be pre-calibrated according to specific circumstances, and there is no specific limitation on this. The second preset value is greater than the first preset value. For example, the first preset value is 20% and the second preset value is 98%.

[0049] It can be understood that the embodiment of the present application can generate a mode recommendation prompt based on the current SOC. When the current SOC is less than the first preset value, it indicates that the vehicle’s battery is low at this time, and the mode recommendation prompt is the second charging mode. When the current SOC is greater than the second preset value, it indicates that the vehicle’s battery is relatively sufficient at this time, and the mode recommendation prompt is the second discharge mode. When the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, it indicates that the vehicle’s battery is at an intermediate value at this time, and the mode recommendation prompt can be the second charging mode and the second discharge mode. After generating the mode recommendation prompt, the user's selection intention can be identified, and the corresponding vehicle can be controlled to enter the second charging mode or the second discharge mode according to the user's selection intention, so as to fully respect the user's needs.

[0050] In an embodiment of the present application, the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid, including: determining the corresponding vehicle as a charging-allowed vehicle or a discharging-allowed vehicle according to the target selection intention; obtaining the power consumption of the power-consuming equipment and the power generation of the power generation equipment of the power grid, if the power consumption is greater than the power generation, controlling the discharging vehicle to enter the second discharging mode, and if the power consumption is less than the power generation, controlling the charging vehicle to enter the second charging mode.

[0051] It can be understood that the embodiment of the present application can determine that the corresponding vehicle is a charging-allowed vehicle or a discharging-allowed vehicle according to the target selection intention, and control the corresponding vehicle to enter the second discharging mode or the second charging mode according to the power consumption of the power-consuming equipment in the power grid and the power generation of the power generation equipment, specifically:

[0052] If the power consumption is greater than the power generation, it indicates that the power grid may have a power shortage problem at this time, so the discharging vehicle can be controlled to enter the second discharging mode to provide power support for the power grid;

[0053] If the power consumption is less than the power generation, it indicates that the power grid may have excess power at this time. Therefore, the charging vehicle can be controlled to enter the second charging mode, allowing the charging vehicle to be used as an energy storage device, thereby achieving efficient utilization of the power grid energy.

[0054] In an embodiment of the present application, a reference database is established or the power battery life of the vehicle is predicted based on the actual operating data, including: identifying the number of charge and discharge cycles in the historical operating data; if the number of charge and discharge cycles is less than or equal to the preset number, establishing a reference database based on the actual operating data; if the number of charge and discharge cycles is greater than the preset number, predicting the power battery life of the vehicle based on the reference database and the actual operating data.

[0055] It can be understood that in the embodiment of the present application, when the number of charge and discharge cycles is less than or equal to the predicted number (for example, 5 times), it indicates that the power battery is relatively a new battery and its operating data is more stable and reliable. Therefore, a reference database can be established based on the actual operating data to ensure the accuracy of the data stored in the database. When the number of charge and discharge cycles is greater than the preset number, the power battery life of the vehicle can be predicted based on the reference database and the actual operating data, so as to help users understand the life limit of the power battery in advance and facilitate users to plan in advance.

[0056] It should be noted that if the charge and discharge cycles of the power battery exceed the preset number, the data may be inaccurate. Therefore, the embodiment of the present application only establishes a reference database based on actual operating data when the number of charge and discharge cycles is less than or equal to the predicted number.

[0057] In an embodiment of the present application, the power battery life of the vehicle is predicted based on a reference database and actual operating data, including: identifying the data type of each data in the actual operating data; determining the data weight of the corresponding data based on the data type; weighting all data based on the data type and the corresponding data weight; and predicting the power battery life of the vehicle based on the weighted data and the reference database.

[0058] It can be understood that the embodiments of the present application can identify the data type of each data in the actual operating data, and determine the data weight of the corresponding data according to the data type. For example, the data weight can be determined by searching a preset database according to the data type, and all data can be weighted according to the data type and the corresponding data weight to obtain weighted data, and then the vehicle's power battery life can be predicted based on the weighted data and the reference database.

[0059] For example, using pressure difference, internal resistance and temperature as an example, the life of the power battery is calculated.

[0060] The battery life decay is = (later operation voltage difference - preset database battery voltage difference) * weight coefficient K1 + (later operation temperature rise - preset database operation temperature rise) * weight coefficient K2 + (later operation internal resistance - preset database internal resistance) * weight coefficient K3, where K1, K2, K3 are (values ​​between 0-1). The specific values ​​of K1, K2, K3 are adjusted according to the battery test data.

[0061] In addition, it should be noted that the embodiments of the present application can evaluate the battery life operation condition only based on the change of the battery pressure difference. For example, the dynamic pressure difference of the preset database is 10mv. After 8 years of operation, the dynamic pressure difference under the same standard operating conditions is 50mV, and the pressure difference value that cannot be used for attenuation is 100mv. In this case, a linear attenuation evaluation of the battery life can also be performed.

[0062] The charge and discharge management method of the present application is described below through a specific embodiment. Figure 2 As shown, including:

[0063] 1. The vehicle is connected to the charging and discharging pile.

[0064] 2. The vehicle and the charging and discharging pile exchange information, including total voltage, single cell voltage, temperature, SOC, number of charging and discharging cycles, pressure difference and other information.

[0065] 3. Obtain the vehicle battery voltage difference based on the information interaction through 2. If the battery voltage difference is greater than 20mv, adopt the first charge and discharge mode (i.e., the standard balanced maintenance mode, such as constant current 0.1C charging) to maintain the vehicle battery and correct the inconsistency of the vehicle, thereby ensuring consistent maintenance of market vehicles and various vehicles.

[0066] 4. If the battery voltage difference is less than or equal to 20mv, the number of charge and discharge cycles that the vehicle's power battery has run is obtained. If the number of cycles is less than 5 times, the microgrid (equivalent to a small power grid) dispatches this batch of vehicles to establish a reference database for vehicle standard batteries. The specific implementation plan is to control the vehicle to enter the second charge and discharge mode, and through standard charge and discharge conditions, collect the battery's standard voltage, temperature, differential voltage resistance and other core parameters, and establish a reference database with the data.

[0067] It should be noted that a cycle number of less than 5 times means that the battery is a brand new battery. A standard database can be established. The database of standard factory batteries can serve as the initial and original benchmark for vehicle operation. If it is used many times, the data will become invalid. Standard charge and discharge conditions, such as charging at 1 / 3C and discharging at 1 / 3C, or discharging at 1 / 3C and charging at 1C, can be adjusted according to the actual characteristics of the battery.

[0068] 5. If the microgrid has too much electricity, the vehicle's power battery, as an energy storage device, can ensure that the excess electricity of the microgrid is combined with the vehicle's status (voltage, SOC, etc.) according to the energy scheduling of the microgrid, and determine the vehicles that need to be replenished (such as vehicles with SOC less than 20%) and the vehicles allowed by the user to be charged enter the second charging mode (that is, the grid actively charges the vehicle).

[0069] It should be noted that since the microgrid can control whether the charging pile is charged or discharged, the microgrid detects the power consumption of the electrical equipment. If the power consumption of the electrical equipment is large and exceeds the power generation of photovoltaic or other energy storage equipment, the microgrid needs to send a command to the charging pile to let the vehicle discharge. The charging pile receives the discharge command and discharge demand power sent by the microgrid to the charging pile, and the battery of the vehicle in the factory discharges the battery of the vehicle to the grid for the use of the electrical equipment according to the demand of the charging pile. Similarly, if the microgrid detects that the photovoltaic power used by the electrical equipment is not much, and there is excess photovoltaic power that has nowhere to be used, the microgrid can send instructions to the charging pile to charge the factory's vehicles and consume the electricity. The whole process needs to be dynamically adjusted according to the status of the factory's vehicles. If there are 9 out of 10 vehicles in the factory with a higher power of 90% SOC, they do not need to be charged. When charging, one vehicle with less than 90% power is preferentially dispatched for charging. Similarly, when discharging, 9 vehicles with higher power are preferentially dispatched for discharge. Similarly, vehicles with high temperatures (greater than 50 degrees) will not be charged or discharged, while vehicles with slightly lower temperatures will be charged and discharged first. During the entire process, since the vehicle battery, charging pile and external network have established communication links and can maintain consistent communication transmission, the process can be switched in real time.

[0070] 6. The vehicle discharges to the microgrid for use by power supply equipment, which can satisfy the power battery as a discharge device to provide power to the microgrid electrical equipment. For example, a vehicle with an SOC greater than 95% is a vehicle that can be discharged, and the control user allows the vehicle to enter the second discharge mode (the grid actively discharges the vehicle mode).

[0071] In addition, it should be noted that a vehicle with an SOC between 20% and 95% can enter the second charging mode or the second discharging mode according to the user's selection.

[0072] 7. During the process of discharging and charging the vehicle battery by the microgrid, or even if the microgrid has no charging and discharging demand, the microgrid can also collect the battery voltage, temperature, current, pressure difference, internal and other information of the charging and discharging conditions according to the preset charging and discharging conditions, and perform weighted processing, compare with the reference database, and make life predictions for battery life, pressure difference changes, etc. For example, if the core parameters in the initial stage are consistent with the core parameters of the reference database, it means that the battery life is good. If the core parameters of the actual vehicle are not consistent with the core parameters of the reference database, it means that the battery life is poor.

[0073] In summary, the method of the present application can meet the functions of standard battery data collection, vehicle balanced maintenance, standard microgrid discharge, charging function, life prediction, etc., improve battery maintenance, care, and use through different needs, and realize comprehensive management of vehicle charging and discharging.

[0074] According to the charging and discharging management method proposed in the embodiment of the present application, charging and discharging management can be performed on all vehicles within the target range of the microgrid, and the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles in the microgrid can be obtained. According to the battery voltage difference in the historical operation data of the power battery, the charging and discharging mode of the corresponding vehicle is determined, and then the corresponding vehicle is charged or discharged according to the charging and discharging mode. Specifically, when the battery voltage difference is large, it is the first charging and discharging mode to balance the voltage difference of the power battery. When the battery voltage difference is small, the vehicle is controlled to perform normal charging and discharging, which is the second charging and discharging mode. According to the actual operation data, a reference database is established or the power battery life of the vehicle is predicted, thereby realizing comprehensive management of vehicle charging and discharging within a certain range of the microgrid and comprehensive monitoring of the vehicle power battery, which can effectively maintain the service life of the vehicle power battery.

[0075] Next, a microgrid charging and discharging management device proposed according to an embodiment of the present application is described with reference to the accompanying drawings.

[0076] Figure 3 It is a block diagram of a microgrid charge and discharge management device according to an embodiment of the present application.

[0077] like Figure 3 As shown, the microgrid charge and discharge management device 10 includes: an identification module 100 , a first control module 200 and a second control module 300 .

[0078] Among them, the identification module 100 is used to identify the battery voltage difference in the historical operation data of the power batteries of all vehicles connected to the charging and discharging piles in the microgrid; the first control module 200 is used to control the corresponding vehicle to enter the first charging and discharging mode if the battery voltage difference is greater than the preset voltage difference, wherein the first charging and discharging mode is used to balance the voltage difference of the power battery; the second control module 300 is used to control the corresponding vehicle to enter the second charging and discharging mode if the battery voltage difference is less than or equal to the preset voltage difference, collect the actual operation data of the power battery of the vehicle entering the second charging and discharging mode, establish a reference database or predict the power battery life of the vehicle based on the actual operation data, wherein the second charging and discharging mode is different from the first charging and discharging mode.

[0079] In an embodiment of the present application, the second control module 300 is further used to: identify the number of charge and discharge cycles in historical operating data; if the number of charge and discharge cycles is less than or equal to a preset number, establish a reference database based on actual operating data; if the number of charge and discharge cycles is greater than the preset number, predict the vehicle's power battery life based on the reference database and actual operating data.

[0080] In an embodiment of the present application, the second control module 300 is further used to: identify the data type of each data in the actual operating data; determine the data weight of the corresponding data according to the data type; perform weighted processing on all data according to the data type and the corresponding data weight; and predict the vehicle's power battery life based on the weighted data and the reference database.

[0081] In the embodiment of the present application, the first charge and discharge mode includes a first charge mode and a first discharge mode, wherein the first charge mode is charging a cell with a voltage less than a preset voltage in the power battery, and the first discharge mode is discharging a cell with a voltage greater than a preset voltage in the power battery.

[0082] In an embodiment of the present application, the second charge and discharge mode includes a second charging mode and a second discharging mode, and the second control module 300 is further used to: identify the number of charge and discharge cycles and the current SOC in the historical operation data; if the number of charge and discharge cycles is less than or equal to the preset number, control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC; if the number of charge and discharge cycles is greater than the preset number, control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid.

[0083] In an embodiment of the present application, the second control module 300 is further used to: generate a mode recommendation prompt based on the current SOC, wherein if the current SOC is less than a first preset value, the mode recommendation prompt is the second charging mode, if the current SOC is greater than the second preset value, the mode recommendation prompt is the second discharge mode, if the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, then the mode recommendation prompt is any one of the second charging mode and the second discharge mode, and the second preset value is greater than the first preset value; identify the user's target selection intention in response to the mode recommendation prompt, and control the corresponding vehicle to enter the second charging mode or the second discharge mode according to the target selection intention.

[0084] In an embodiment of the present application, the second control module 300 is further used to: determine whether the corresponding vehicle is a charging-allowed vehicle or a discharging-allowed vehicle according to the target selection intention; obtain the power consumption of the power-consuming equipment and the power generation of the power generation equipment in the power grid, and if the power consumption is greater than the power generation, control the discharging vehicle to enter the second discharging mode; if the power consumption is less than the power generation, control the charging vehicle to enter the second charging mode.

[0085] It should be noted that the aforementioned explanation of the embodiment of the microgrid charge and discharge management method is also applicable to the microgrid charge and discharge management device of this embodiment, and will not be repeated here.

[0086] According to the microgrid charge and discharge management device proposed in the embodiment of the present application, charge and discharge management can be performed on all vehicles within the target range of the microgrid, and the historical power battery operation data of all vehicles connected to the charging and discharging piles in the microgrid can be obtained. According to the battery voltage difference in the historical power battery operation data, the charge and discharge mode of the corresponding vehicle is determined, and then the corresponding vehicle is charged or discharged according to the charge and discharge mode. Specifically, when the battery voltage difference is large, it is the first charge and discharge mode to balance the voltage difference of the power battery. When the battery voltage difference is small, the vehicle is controlled to perform normal charge and discharge, which is the second charge and discharge mode. According to the actual operation data, a reference database is established or the power battery life of the vehicle is predicted, thereby realizing comprehensive management of vehicle charging and discharging within a certain range of the microgrid and comprehensive monitoring of the vehicle power battery, which can effectively maintain the service life of the vehicle power battery.

[0087] Figure 4 A schematic diagram of the structure of a power grid control device provided in an embodiment of the present application. The power grid control device may include:

[0088] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0089] When the processor 402 executes the program, the microgrid charging and discharging management method provided in the above embodiment is implemented.

[0090] Furthermore, the power grid control device further includes:

[0091] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0092] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0093] The memory 401 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0094] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0095] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0096] The processor 402 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0097] An embodiment of the present application also provides a vehicle, the vehicle is connected to a charging and discharging pile, and the above-mentioned power grid control device controls the charging and discharging pile to manage the charging and discharging of the vehicle.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0100] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0101] It should be understood that the various parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, the steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0102] A person of ordinary skill in the art may understand that all or part of the steps carried by the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0103] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A microgrid charging and discharging management method, characterized in that: The following steps are involved: Identify historical power battery operation data of all vehicles connected to charging and discharging piles within the target range of the microgrid, and identify battery voltage differences in the historical power battery operation data; If the battery pressure difference is greater than the preset pressure difference, the corresponding vehicle is controlled to enter a first charge and discharge mode, wherein the first charge and discharge mode is used to balance the pressure difference of the power battery; If the battery pressure difference is less than or equal to the preset pressure difference, the corresponding vehicle is controlled to enter a second charge and discharge mode, and the actual operation data of the power battery of the vehicle entering the second charge and discharge mode is collected. A reference database is established or the power battery life of the vehicle is predicted based on the actual operation data, wherein the second charge and discharge mode is different from the first charge and discharge mode.

2. The microgrid charge and discharge management method according to claim 1, characterized in that: The establishing of a reference database or predicting the life of the power battery of the vehicle according to the actual operation data includes: Identifying the number of charge and discharge cycles in the historical operation data; If the number of charge-discharge cycles is less than or equal to a preset number, establishing a reference database according to the actual operation data; If the number of charge and discharge cycles is greater than the preset number, the power battery life of the vehicle is predicted based on the reference database and the actual operation data.

3. The microgrid charge and discharge management method according to claim 2, characterized in that: The predicting the vehicle's power battery life according to the reference database and the actual operation data includes: Identify the data type of each data in the actual operation data; Determine a data weight of corresponding data according to the data type; Perform weighted processing on all data according to the data type and corresponding data weight; The vehicle's power battery life is predicted based on the weighted data and the reference database.

4. The microgrid charge and discharge management method according to claim 1, characterized in that: The first charge and discharge mode includes a first charge mode and a first discharge mode, wherein the first charge mode is to charge cells in the power battery with a voltage lower than a preset voltage, and the first discharge mode is to discharge cells in the power battery with a voltage higher than a preset voltage.

5. The microgrid charge and discharge management method according to claim 1, characterized in that: The second charge-discharge mode includes a second charge mode and a second discharge mode, and the controlling the corresponding vehicle to enter the second charge-discharge mode includes: Identify the number of charge and discharge cycles and the current SOC in the historical operation data; If the number of charge and discharge cycles is less than or equal to a preset number, controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC; If the number of charge and discharge cycles is greater than the preset number, the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid.

6. The microgrid charge and discharge management method according to claim 5, characterized in that: The controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC includes: Generate a mode recommendation prompt according to the current SOC, wherein if the current SOC is less than a first preset value, the mode recommendation prompt is a second charging mode, if the current SOC is greater than a second preset value, the mode recommendation prompt is a second discharging mode, if the current SOC is greater than or equal to the first preset value and less than or equal to the second preset value, the mode recommendation prompt is the second charging mode and the second discharging mode, and the second preset value is greater than the first preset value; The target selection intention of the user in response to the mode recommendation prompt is identified, and the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the target selection intention.

7. The microgrid charge and discharge management method according to claim 6, characterized in that: The controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC and the charging and discharging demand of the power grid includes: Determining, according to the target selection intention, whether the corresponding vehicle is a charging-allowed vehicle or a discharging-allowed vehicle; The power consumption of the power-consuming equipment and the power generation of the power generation equipment of the power grid are obtained. If the power consumption is greater than the power generation, the vehicle allowed to discharge is controlled to enter the second discharge mode. If the power consumption is less than the power generation, the vehicle allowed to charge is controlled to enter the second charging mode.

8. A microgrid charge and discharge management device, characterized in that: include: An identification module is used for the historical operation data of power batteries of all vehicles connected to the charging and discharging piles within the target range of the microgrid, and identifies the battery pressure difference in the historical operation data of the power batteries; A first control module, configured to control the corresponding vehicle to enter a first charge and discharge mode if the battery pressure difference is greater than a preset pressure difference, wherein the first charge and discharge mode is used to balance the pressure difference of the power battery; The second control module is used to control the corresponding vehicle to enter a second charge and discharge mode if the battery pressure difference is less than or equal to the preset pressure difference, collect actual operation data of the power battery of the vehicle entering the second charge and discharge mode, and establish a reference database or predict the power battery life of the vehicle according to the actual operation data, wherein the second charge and discharge mode is different from the first charge and discharge mode.

9. A power grid control device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the microgrid charging and discharging management method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: The vehicle is connected to a charging and discharging pile, and the grid control device according to claim 9 controls the charging and discharging pile to manage the charging and discharging of the vehicle.

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