Micro-grid charging and discharging management method and device, power grid control equipment and vehicle

Abstract

The application relates to the technical field of vehicles, in particular to a micro-grid charging and discharging management method and device, a power grid control equipment and a vehicle. The method comprises the following steps: identifying historical operation data of power batteries of all vehicles connected to charging and discharging piles in a target range of a micro-grid, and identifying a battery pressure difference in the historical operation data of the power batteries; if the battery pressure difference is greater than a preset pressure difference, a corresponding vehicle is controlled to enter a first charging and discharging mode, wherein the first charging and discharging mode is used for balancing the pressure difference of the power batteries; if the battery pressure difference is less than or equal to the preset pressure difference, the corresponding vehicle is controlled to enter a second charging and discharging mode, actual operation data of the power batteries of the vehicle entering the second charging and discharging mode is collected, a reference database is established according to the actual operation data, and the service life of the power batteries of the vehicle is predicted, wherein the second charging and discharging mode is different from the first charging and discharging mode. Therefore, the problems that comprehensive management of charging and discharging of vehicles cannot be realized in the related art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a micro-grid charging and discharging management method and device, a power grid control device and a vehicle. BACKGROUND

[0002] The popularity of electric vehicles not only requires efficient charging facilities, but also requires intelligent charging and discharging management systems to optimize the use and maintenance of batteries. Traditional charging piles mainly focus on charging functions, and ignore the comprehensive monitoring and management of battery status. With the increase in the number of electric vehicles, how to realize the bidirectional energy flow between vehicles and power grids, i.e., V2G (Vehicle-to-Grid) technology, has become a new research hotspot. V2G technology not only improves energy utilization efficiency, but also balances power grid load through electric vehicle batteries as energy storage devices, improving the stability of the power grid.

[0003] The existing charging pile charging and discharging strategy mainly relies on V2G technology to realize discharging from vehicles to power grids, specifically by charging electric energy into the batteries of electric vehicles through charging piles, and under certain conditions, the electric vehicles can release the electric energy in the batteries to the power grid through the charging piles. Although it can achieve bidirectional movement of energy to a certain extent, it does not realize comprehensive monitoring of the battery status of the vehicle and comprehensive management of charging and discharging. SUMMARY

[0004] The present application provides a micro-grid charging and discharging management method, device, power grid control device and vehicle to solve the problem that comprehensive management of vehicle charging and discharging cannot be realized in related technologies.

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

[0006] Optionally, the reference database is established according to the actual operation data or the power battery life of the vehicle is predicted, comprising: identifying the number of charge-discharge cycles of the historical operation data; if the number of charge-discharge cycles is less than or equal to a preset number, the reference database is established according to the actual operation data; if the number of charge-discharge cycles is greater than the preset number, the power battery life of the vehicle is predicted according to the reference database and the actual operation data.

[0007] Optionally, the power battery life of the vehicle is predicted according to the reference database and the actual operation data, comprising: identifying the data type of each data in the actual operation data; determining the data weight of the corresponding data according to the data type; performing weighted processing on all data according to the data type and the corresponding data weight; and predicting the power battery life of the vehicle according to the weighted processed data and the reference database.

[0008] Optionally, the first charge-discharge mode comprises a first charge mode and a first discharge mode, wherein the first charge mode is to charge the single battery less than a preset voltage in the power battery, and the first discharge mode is to discharge the single battery greater than the preset voltage in the power battery.

[0009] Optionally, the second charge-discharge mode comprises a second charge mode and a second discharge mode, and the control of the corresponding vehicle entering the second charge-discharge mode comprises: identifying the number of charge-discharge cycles of the historical operation data and the current SOC; if the number of charge-discharge cycles is less than or equal to a preset number, the corresponding vehicle is controlled to enter the second charge mode or the second discharge mode according to the current SOC; if the number of charge-discharge cycles is greater than the preset number, the corresponding vehicle is controlled to enter the second charge mode or the second discharge mode according to the current SOC and the grid charge-discharge demand.

[0010] Optionally, the control of the corresponding vehicle entering the second charge mode or the second discharge mode according to the current SOC comprises: 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 charge mode, if the current SOC is greater than a 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 charge 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 responding to the mode recommendation prompt, and controlling the corresponding vehicle to enter the second charge mode or the second discharge mode according to the target selection intention.

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

[0012] The second aspect embodiment of the present application provides a micro-grid charging and discharging management device, comprising: an identification module, configured to identify historical operation data of power batteries of all vehicles connected to charging and discharging piles in a target range of a micro-grid, and identify a battery pressure difference in the historical operation data of the power batteries; a first control module, configured to control a corresponding vehicle to enter a first charging and discharging mode if the battery pressure difference is greater than a preset pressure difference, wherein the first charging and discharging mode is used to balance the pressure difference of the power batteries; and a second control module, configured to control the corresponding vehicle to enter a second charging and discharging mode if the battery pressure difference is less than or equal to the preset pressure difference, collect actual operation data of power batteries of the vehicle entering the second charging and discharging mode, and establish a reference database according to the actual operation data or predict the service life of the power batteries of the vehicle, wherein the second charging and discharging mode is different from the first charging and discharging mode.

[0013] Optionally, the second control module is further configured to: identify a charging and discharging power cycle number in the historical operation data; establish the reference database according to the actual operation data if the charging and discharging power cycle number is less than or equal to a preset number; and predict the service life of the power batteries of the vehicle according to the reference database and the actual operation data if the charging and discharging power cycle number is greater than the preset number.

[0014] Optionally, the second control module is further configured to: identify a data type of each data in the actual operation data; determine a 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 service life of the power batteries of the vehicle according to the weighted processed data and the reference database.

[0015] Optionally, the first charging and discharging mode comprises a first charging mode and a first discharging mode, wherein the first charging mode is charging of a single battery less than a preset voltage in the power battery, and the first discharging mode is discharging of a single battery greater than the preset voltage in the power battery.

[0016] Optionally, the second charging and discharging mode comprises a second charging mode and a second discharging mode, and the second control module is further configured to: identify the number of charging and discharging cycles and the current SOC in the historical operation data; if the number of charging and discharging 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; and if the number of charging and discharging 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 configured to: 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 the second charging mode; if the current SOC is greater than a second preset value, the mode recommendation prompt is the second discharging mode; and 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; identify the target selection intention of the user in response to the mode recommendation prompt, and control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the target selection intention.

[0018] Optionally, the second control module is further configured to: determine, according to the target selection intention, that the corresponding vehicle is a charging-allowed vehicle or a discharging-allowed vehicle; acquire the power consumption of the power-consuming device and the power generation of the power-generating device of the power grid, and control the discharging-allowed vehicle to enter the second discharging mode if the power consumption is greater than the power generation, or control the charging-allowed vehicle to enter the second charging mode if the power consumption is less than the power generation.

[0019] The third aspect of the embodiments of the present application provides a power grid control device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the micro-grid charging and discharging management method of the above-mentioned embodiments.

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

[0021] Therefore, the present application has the following beneficial effects:

[0022] The embodiment of the present application can perform charging and discharging management on all vehicles within the target range of the micro-grid, can obtain the historical operation data of the power battery of all vehicles connected to the charging and discharging pile in the micro-grid, determine the charging and discharging mode of the corresponding vehicle according to the battery pressure difference in the historical operation data of the power battery, and then charge or discharge the corresponding vehicle according to the charging and discharging mode. Specifically, when the battery pressure difference is large, it is the first charging and discharging mode, and the pressure difference of the power battery is balanced; when the battery pressure difference is small, the vehicle is controlled to normally charge and discharge, which is the second charging and discharging mode. According to the actual operation data, a reference database is established or the service life of the power battery of the vehicle is predicted, so as to realize comprehensive management of the charging and discharging of the vehicle within a certain range of the micro-grid and comprehensive monitoring of the power battery of the vehicle, and effectively maintain the service life of the power battery of the vehicle. Thus, the technical problems that the comprehensive management of the charging and discharging of the vehicle cannot be realized in the related art are solved.

[0023] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be known by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

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

[0025] Figure 1 A flowchart of a micro-grid charging and discharging management method according to an embodiment of the present application is provided.

[0026] Figure 2 A specific flowchart of a micro-grid charging and discharging management method according to an embodiment of the present application is provided.

[0027] Figure 3 An example diagram of a micro-grid charging and discharging management device according to an embodiment of the present application is provided.

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

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] The following description, with reference to the accompanying drawings, outlines a microgrid charging and discharging management method, apparatus, grid control equipment, and vehicle according to embodiments of this application. Addressing the issue mentioned in the background art that while existing charging pile charging and discharging strategies can achieve bidirectional energy movement to a certain extent, they do not provide comprehensive monitoring of vehicle battery status and integrated charging and discharging management, this application provides a microgrid charging and discharging management method. This method can manage the charging and discharging of all vehicles within the target range of the microgrid. It can acquire historical operating data of the power batteries of all vehicles connected to charging and discharging piles in the microgrid. Based on the battery voltage difference in the historical operating data, the charging and discharging mode for the corresponding vehicle is determined. Then, the corresponding vehicle is charged or discharged according to the charging and discharging mode. Specifically, when the battery voltage difference is large, a first charging and discharging mode is used 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 a second charging and discharging mode. A reference database is established based on actual operating data, or the lifespan of the vehicle's power battery is predicted. This achieves comprehensive management of vehicle charging and discharging within a certain range of the microgrid and comprehensive monitoring of vehicle power batteries, effectively maintaining the lifespan of vehicle power batteries. Thus, it solves the problem of the inability to achieve comprehensive management of vehicle charging and discharging in related technologies.

[0031] Specifically, Figure 1 This is a flowchart illustrating a microgrid charging and discharging management method provided in an embodiment of this application.

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

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

[0034] Among them, microgrids are small-scale power grids.

[0035] It is understood that the embodiments of this application can identify the historical operating data of the power batteries of all vehicles connected to charging and discharging piles within the target range of the microgrid, and identify the battery voltage difference in the historical operating data of the power batteries, so as to manage the charging and discharging of vehicles in the microgrid in the future.

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

[0037] The first charging and discharging mode includes a first charging mode and a first discharging mode. The first charging mode is for charging individual cells in the power battery with a voltage lower than a preset value, and the first discharging mode is for discharging individual cells in the power battery with a voltage higher than a preset value.

[0038] It should be noted that the preset pressure difference and the preset voltage can be set according to specific conditions, and no specific limitation is made.

[0039] Since a large battery pressure difference between the battery monomers of the power battery will cause some monomers to prematurely age or degrade in performance, thereby affecting the performance and life of the entire battery pack, the embodiment of the present application can control the corresponding vehicle to enter the first charge and discharge mode when the battery pressure difference is greater than the preset pressure difference, and the battery is balanced and maintained to ensure the consistency and stability between the battery monomers. The first charging mode is to charge the monomers in the power battery that are less than the preset voltage, and the first discharging mode is to discharge the monomers in the power battery that are 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 charge and discharge mode after the corresponding vehicle completes the first charge and discharge mode, that is, after balancing the pressure difference of the power battery.

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

[0042] The first charge and discharge mode is used to balance the voltage of the battery monomers, and can independently charge and discharge individual battery monomers to improve the consistency and safety of the battery. The second charge and discharge mode is mainly used for evaluating and predicting the overall battery performance, and 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 when the battery pressure difference is less than or equal to the preset pressure difference, it indicates that there is no inconsistency in the power battery monomers at this time, and the corresponding vehicle is controlled to enter the second charge and discharge mode, and the actual running data of the power battery of the vehicle entering the second charge and discharge mode is collected to establish a reference database according to the actual running data or predict the life of the power battery of the vehicle, so as to realize comprehensive management of the power battery of the vehicle.

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

[0045] In the embodiment of the present application, the operation data includes the total voltage of the power battery, the single cell voltage, the temperature, the SOC, the charging and discharging power cycle number, the battery voltage difference, etc.; and the preset number can be set according to specific conditions, such as 5 times or 6 times, which is not limited in detail.

[0046] It can be understood that, when the charging and discharging power cycle number is less than or equal to the preset number, the embodiment of the present application can indicate that the power battery of the vehicle is almost a new battery, and the corresponding vehicle can be controlled to enter the second charging mode or the second discharging mode according to the current SOC, so as to collect the actual operation data of the vehicle, and facilitate the subsequent establishment of the reference database (i.e., the database of standard factory batteries) of the vehicle. When the charging and discharging power cycle number 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 power grid charging and discharging demand, so as to combine the power battery of the vehicle with the power grid demand, and realize the optimization of resource allocation.

[0047] In the embodiment of the present application, the control of the corresponding vehicle entering the second charging mode or the 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 a second preset value, the mode recommendation prompt is the 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; identifying the target selection intention of the user responding to the mode recommendation prompt, and controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the target selection intention.

[0048] In the embodiment of the present application, the first preset value and the second preset value can be calibrated in advance according to specific conditions, which is not limited in detail, and the second preset value is greater than the first preset value, such as the first preset value being 20% and the second preset value being 98%.

[0049] It can be understood that the embodiments of the present application can generate mode recommendation prompts according to the current SOC. When the current SOC is less than a first preset value, it indicates that the vehicle has low power at this time, and the mode recommendation prompt is the second charging mode. When the current SOC is greater than a second preset value, it indicates that the vehicle has sufficient power at this time, and the mode recommendation prompt is the second discharging 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 has an intermediate value of power at this time, and the mode recommendation prompt can be the second charging mode and the second discharging mode. After generating the mode recommendation prompt, the selection intention of the user can be recognized, and the corresponding vehicle can be controlled to enter the second charging mode or the second discharging mode according to the selection intention of the user, so as to fully respect the needs of the user.

[0050] In the embodiments 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 power grid charging and discharging demand, which comprises: determining the corresponding vehicle as a vehicle allowed to charge or a vehicle allowed to discharge according to the target selection intention; obtaining the power consumption of the power consumption equipment and the power generation of the power generation equipment in the power grid. If the power consumption is greater than the power generation, the vehicle allowed to discharge is controlled to enter the second discharging mode. If the power consumption is less than the power generation, the vehicle allowed to charge is controlled to enter the second charging mode.

[0051] It can be understood that the embodiments of the present application can determine the corresponding vehicle as a vehicle allowed to charge or a vehicle allowed to discharge 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 consumption equipment and the power generation of the power generation equipment in the power grid, which specifically comprises:

[0052] If the power consumption is greater than the power generation, it indicates that the power grid may have a power supply shortage problem at this time, and therefore the vehicle allowed to discharge 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 a power surplus at this time, and therefore the vehicle allowed to charge can be controlled to enter the second charging mode, so as to realize efficient use of energy of the power grid.

[0054] In the embodiments of the present application, the reference database is established according to the actual operation data or the life of the power battery of the vehicle is predicted, which comprises: identifying the charging and discharging power cycle times in the historical operation data; if the charging and discharging power cycle times are less than or equal to a preset number, the reference database is established according to the actual operation data; if the charging and discharging power cycle times are greater than the preset number, the life of the power battery of the vehicle is predicted according to the reference database and the actual operation data.

[0055] It can be understood that when the charge and discharge electric quantity cycle number is less than or equal to the predicted number (such as 5 times), it indicates that the power battery is relatively new, and the operation data is more stable and reliable, so the reference database can be established according to the actual operation data to ensure the accuracy of the data stored in the database. When the charge and discharge electric quantity cycle number is greater than the preset number, the life of the power battery of the vehicle can be predicted according to the reference database and the actual operation data, so as to help the user to know the life limit of the power battery in advance and facilitate the user to plan in advance.

[0056] It should be noted that if the charge and discharge electric quantity cycle of the power battery exceeds the preset number, the data may not be accurate, so the reference database is established according to the actual operation data only when the charge and discharge electric quantity cycle number is less than or equal to the predicted number.

[0057] In the embodiment of the application, the life of the power battery of the vehicle is predicted according to the reference database and the actual operation data, comprising: identifying the data type of each data in the actual operation data; determining the data weight of the corresponding data according to the data type; weighting all data according to the data type and the corresponding data weight; and predicting the life of the power battery of the vehicle according to the weighted data and the reference database.

[0058] It can be understood that the embodiment of the application can identify the data type of each data in the actual operation data, and determine the data weight of the corresponding data according to the data type, such as determining the data weight by searching the preset database according to the data type, and weighting all data according to the data type and the corresponding data weight to obtain the weighted data, and then predicting the life of the power battery of the vehicle according to the weighted data and the reference database.

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

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

[0061] In addition, it should be noted that the embodiment of the application can only evaluate the life running condition of the battery according to the change of the battery voltage difference, such as the dynamic voltage difference of the preset database is 10mv, and after running for 8 years, the dynamic voltage difference under the same standard working condition is 50mV, and the attenuation cannot use the voltage difference value of 100mv, then the linear evaluation of the battery life attenuation can also be performed.

[0062] The charge and discharge management method of the application is described below through a specific embodiment, as shown in the following table, including: Figure 2

[0063] 1. The vehicle is connected to the charge and discharge pile.

[0064] 2. The vehicle and the charge and discharge pile exchange information, including total voltage, single cell voltage, temperature, SOC, charge and discharge cycle number, pressure difference and other information.

[0065] 3. According to the information exchange in 2, the vehicle battery pressure difference is obtained, if the battery pressure difference is greater than 20mv, the first charge and discharge mode (i.e. the standard equalization maintenance mode, such as using constant current 0.1C charging) is used to maintain the vehicle battery, correct the inconsistency of the vehicle, and ensure the consistency of the maintenance of the market vehicle and various vehicles.

[0066] 4. If the battery pressure difference is less than or equal to 20mv, the charge and discharge cycle number of the vehicle power battery has been run is obtained, if the cycle number is less than 5 times, the microgrid (equivalent to a small power grid) dispatches this batch of vehicles to establish the reference database of the standard vehicle battery, the specific implementation scheme is to control the vehicle to enter the second charge and discharge mode, and through the standard charge and discharge working condition, the core parameters such as standard voltage, temperature, pressure difference resistance of the battery are collected, and the data is established to establish the reference database.

[0067] It should be noted that the cycle number less than 5 times represents that the battery belongs to a new battery, and a standard database can be established, and a standard database of the battery out of the factory can be established as the first original benchmark for the vehicle operation, if the use frequency is high, the data will be invalid; The standard charge and discharge working condition, such as charging at 1 / 3C, discharging at 1 / 3C, discharging at 1 / 3C, charging at 1C, and adjusting according to the actual characteristics of the battery.

[0068] 5. If the microgrid power is too much, the vehicle power battery can be used as an energy storage device to ensure that the excess power of the microgrid is combined with the state of the vehicle (voltage, SOC, etc.) to determine the vehicle that needs to be charged (such as the vehicle with SOC less than 20%) and the vehicle that the user allows to enter the second charging mode (i.e. the grid actively charging mode).

[0069] ​It should be noted that, since the micro-grid can control the charging and discharging of the charging pile, the micro-grid detects the power consumption of the electrical equipment, if the power consumption of the electrical equipment is large, exceeds the power generation of the photovoltaic or other energy storage devices, the micro-grid needs to send the vehicle to discharge the instruction to the charging pile, and the charging pile receives the discharge instruction and discharge demand power sent by the micro-grid to the charging pile, then the battery of the vehicle in the factory discharges the electricity of the vehicle battery to the power grid for the electrical equipment according to the demand of the charging pile. Similarly, if the micro-grid detects that the photovoltaic electricity used by the electrical equipment is not much, and the photovoltaic electricity has excess power, the micro-grid can send an instruction to the charging pile to charge the vehicle in the factory and consume the electric energy. The whole process needs to be dynamically adjusted according to the state of the vehicles in the factory. If 10 vehicles in the factory have 9 vehicles with high power of 90% SOC, they do not need to be charged, and 1 vehicle with low power is preferentially dispatched to charge. Similarly, when discharging, 9 vehicles with high power are preferentially dispatched to discharge. Similarly, vehicles with high temperature (greater than 50 degrees) do not perform charging and discharging, and vehicles with slightly low temperature preferentially perform charging and discharging. The whole process can be operated and switched in real time because the vehicle battery, the charging pile and the external grid have established communication connection and can maintain consistent communication transmission.

[0070] 6、The vehicle discharges to the micro-grid for the power supply equipment, which can meet the power battery as a discharge device to provide electric energy to the micro-grid electrical equipment. For example, vehicles with SOC greater than 95% can discharge, and the user allows the vehicle to enter the second discharge mode (grid active discharge mode).

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

[0072] 7、In the process of discharging and charging the vehicle battery by the micro-grid, or even if the micro-grid has no charging and discharging demand, the micro-grid can collect the battery voltage, temperature, current, pressure difference, internal information and other information according to the preset charging and discharging condition, and perform weighted processing and comparison with the reference database to predict the battery life and pressure difference change. For example, the consistency of the core parameters in the initial stage and the core parameters in the reference database is good, which indicates that the battery life is good. If the consistency of the core parameters of the actual vehicle and the core parameters of the reference database is not good, it indicates 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 balancing maintenance, standard micro-grid discharging, power supplementing, life prediction and other functions, and can improve the battery maintenance, maintenance and use through different demands, and realize the comprehensive management of the vehicle charging and discharging.

[0074] According to the charging and discharging management method provided in the embodiment of the present application, all vehicles in the target range of the micro-grid can be managed for charging and discharging, the historical operation data of the power battery of all vehicles connected to the charging and discharging pile in the micro-grid can be acquired, the charging and discharging mode of the corresponding vehicle can be determined according to the battery pressure difference in the historical operation data of the power battery, and the corresponding vehicle can be 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, and the pressure difference of the power battery is balanced; when the battery pressure difference is small, the vehicle is controlled to normally charge and discharge, which is the second charging and discharging mode. According to the actual operation data, a reference database is established or the service life of the power battery of the vehicle is predicted, so as to realize comprehensive management of the charging and discharging of the vehicle in a certain range of the micro-grid and overall monitoring of the power battery of the vehicle, and the service life of the power battery of the vehicle can be effectively maintained.

[0075] Secondly, the micro-grid charging and discharging management device according to the embodiment of the present application is described with reference to the accompanying drawings.

[0076] Figure 3 is a block schematic diagram of the micro-grid charging and discharging management device of the embodiment of the present application.

[0077] As shown in Figure 3 , the micro-grid charging and discharging management device 10 comprises an identification module 100, a first control module 200 and a second control module 300.

[0078] The identification module 100 is configured to identify the battery pressure difference in the historical operation data of the power battery of all vehicles connected to the charging and discharging pile in the micro-grid. The first control module 200 is configured to control the corresponding vehicle to enter the first charging and discharging mode if the battery pressure difference is greater than a preset pressure difference, wherein the first charging and discharging mode is used to balance the pressure difference of the power battery. The second control module 300 is configured to control the corresponding vehicle to enter the second charging and discharging mode if the battery pressure difference is less than or equal to the preset pressure difference, to collect the actual operation data of the power battery of the vehicle entering the second charging and discharging mode, and to establish a reference database according to the actual operation data or predict the service life of the power battery of the vehicle, wherein the second charging and discharging mode is different from the first charging and discharging mode.

[0079] In the embodiment of the present application, the second control module 300 is further configured to identify the charging and discharging power cycle times in the historical operation data, to establish the reference database according to the actual operation data if the charging and discharging power cycle times are less than or equal to a preset number of times, and to predict the service life of the power battery of the vehicle according to the reference database and the actual operation data if the charging and discharging power cycle times are greater than the preset number of times.

[0080] In the embodiment of the present application, the second control module 300 is further configured to: identify the data type of each data in the actual operation 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 power battery life of the vehicle according to the weighted processed data and the reference database.

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

[0082] In the embodiment of the present application, the second charging and discharging mode includes a second charging mode and a second discharging mode, and the second control module 300 is further configured to: identify the charging and discharging power cycle number and the current SOC in the historical operation data; if the charging and discharging power cycle number 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; and if the charging and discharging power cycle number 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 grid charging and discharging demand.

[0083] In the embodiment of the present application, the second control module 300 is further configured to: 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 the second charging mode, if the current SOC is greater than a second preset value, the mode recommendation prompt is the 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 any one of the second charging mode and the second discharging mode, and the second preset value is greater than the first preset value; identify the target selection intention of the user responding to the mode recommendation prompt, and control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the target selection intention.

[0084] In the embodiment of the present application, the second control module 300 is further configured to: determine the corresponding vehicle as 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 of the grid, and if the power consumption is greater than the power generation, control the discharging allowed vehicle to enter the second discharging mode, and if the power consumption is less than the power generation, control the charging allowed vehicle to enter the second charging mode.

[0085] It should be noted that the foregoing explanation and description of the micro-grid charging and discharging management method embodiment also applies to the micro-grid charging and discharging management device of this embodiment, which will not be described here again.

[0086] The micro-grid charge-discharge management device provided by the embodiment of the application can perform charge-discharge management on all vehicles in the target range of the micro-grid, can acquire historical operation data of power batteries of all vehicles connected to the charge-discharge pile in the micro-grid, can determine the charge-discharge mode of the corresponding vehicle according to the battery pressure difference in the historical operation data of the power battery, and can further charge or discharge the corresponding vehicle according to the charge-discharge mode. Specifically, when the battery pressure difference is large, it is the first charge-discharge mode, and the pressure difference of the power battery is balanced; when the battery pressure difference is small, the vehicle is controlled to normally charge and discharge, which is the second charge-discharge mode. According to the actual operation data, a reference database is established or the service life of the power battery of the vehicle is predicted, so as to realize comprehensive management of the charge-discharge of the vehicle in a certain range of the micro-grid and comprehensive monitoring of the power battery of the vehicle, and the service life of the power battery of the vehicle can be effectively maintained.

[0087] Figure 4 The power grid control device provided by the embodiment of the application is shown in the structural diagram. The power grid control device can include:

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

[0089] The processor 402 executes the program to realize the micro-grid charge-discharge management method provided in the above embodiment.

[0090] Further, 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 the computer program executable on the processor 402.

[0093] The memory 401 can include a high-speed RAM (Random Access Memory, Random Access Memory) memory, and can 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 independently implemented, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and complete communication between each other. The bus can be an ISA (Industry Standard Architecture, Industry Standard Architecture) bus, a PCI (Peripheral Component, Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture, Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of expression,Figure 4 Only one bus or only one type of bus might exist however.

[0095] Optionally, 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 complete the communication among each other through an internal interface.

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

[0097] The embodiments of the application further provide a vehicle connected to the charging and discharging pile, and the power grid control device described above controls the charging and discharging pile to manage the charging and discharging of the vehicle.

[0098] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or N embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0099] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0100] Any process or method described in a flowchart or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing the specified logical functions or steps, and the various embodiments of the application include alternative implementations of the described processes or methods, in which the order of steps can be changed, including the use of simultaneous steps or reverse order of steps, where necessary and / or desirable.

[0101] It should be understood that portions of the application can be implemented in hardware, software, firmware, or combinations thereof. In the above embodiments, steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. As with the hardware, the software or firmware can be implemented using any of a number of programming languages, such as C, C++, Java, or the like, or combinations thereof, and as such, is not limited to any particular programming language. As such, the software or firmware can be implemented in a plurality of formats, including but not limited to source code, object code, bytecode, interpreted code, or the like.

[0102] Those of ordinary skill in the art will appreciate that the steps carried out by the methods described above can be carried out in whole or in part by a program instructing relevant hardware, and the program described above can be stored in a computer-readable storage medium. When the program is executed, it includes one of the steps of the method embodiments or a combination thereof.

[0103] Although the embodiments of the application have been shown and described above, it should be understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the application.

Claims

1. A microgrid charging and discharging management method, characterized in that, Includes the following steps: Identify the historical operating data of the power batteries of all vehicles connected to charging and discharging piles within the target range of the microgrid, and identify the battery voltage difference in the historical operating data of the power batteries; If the battery voltage difference is greater than the preset voltage difference, the corresponding vehicle is controlled to enter the first charging and discharging mode, wherein the first charging and discharging mode is used to balance the voltage difference of the power battery. If the battery voltage difference is less than or equal to the preset voltage difference, the corresponding vehicle is controlled to enter a second charging / discharging mode. Actual operating data of the vehicle's power battery in the second charging / discharging mode is collected. A reference database is established or the vehicle's power battery life is predicted based on the actual operating data. The second charging / discharging mode is a different charging / discharging mode from the first charging / discharging mode. Establishing the reference database or predicting the vehicle's power battery life based on the actual operating data includes: identifying the number of charging / discharging cycles in the historical operating data of the power battery; if the number of charging / discharging cycles is less than or equal to a preset number, a reference database is established based on the actual operating data; if the number of charging / discharging cycles is greater than the preset number, the vehicle's power battery life is predicted based on the reference database and the actual operating data. Predicting the vehicle's power battery life based on the reference database and the actual operating data includes: identifying the data type of each data point in the actual operating data; determining the data weight of the corresponding data based on the data type; weighting all data according to 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.

2. The microgrid charging and discharging management method according to claim 1, characterized in that, The first charging and discharging mode includes a first charging mode and a first discharging mode, wherein the first charging mode is for charging individual cells in the power battery with a voltage lower than a preset voltage, and the first discharging mode is for discharging individual cells in the power battery with a voltage higher than a preset voltage.

3. The microgrid charging and discharging management method according to claim 1, characterized in that, The second charging and discharging mode includes a second charging mode and a second discharging mode. Controlling the corresponding vehicle to enter the second charging and discharging mode includes: Identify the number of charge / discharge cycles and the current state of charge (SOC) in the historical operating data; If the number of charge / discharge cycles is less than or equal to a preset number, then 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 / discharge cycles is greater than the preset number, then the corresponding vehicle is controlled to enter the second charging mode or the second discharging mode according to the current SOC and the grid charging / discharging demand.

4. The microgrid charging and discharging management method according to claim 3, characterized in that, The step of controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC includes: Based on the current SOC generation mode recommendation prompt, 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 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, where the second preset value is greater than the first preset value. Identify the user's target selection intent in response to the mode recommendation prompt, and control the corresponding vehicle to enter the second charging mode or the second discharging mode according to the target selection intent.

5. The microgrid charging and discharging management method according to claim 4, characterized in that, The step of controlling the corresponding vehicle to enter the second charging mode or the second discharging mode according to the current SOC and the grid charging and discharging demand includes: Based on the target selection intent, the corresponding vehicle is determined to be a vehicle permitted to charge or a vehicle permitted to discharge. The system obtains the electricity consumption of the power-consuming equipment and the power generation of the power-generating equipment. If the electricity consumption is greater than the power generation, the system controls the vehicle allowed to discharge to enter the second discharge mode. If the electricity consumption is less than the power generation, the system controls the vehicle allowed to charge to enter the second charging mode.

6. A microgrid charging and discharging management device, characterized in that, include: The identification module is used to identify the battery voltage difference in the historical operating data of the power batteries of all vehicles connected to charging and discharging piles within the target range of the microgrid. The first control module is used to control the corresponding vehicle to enter a first charging and discharging mode if the battery voltage difference is greater than a 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 is used to control the corresponding vehicle to enter a second charging / discharging mode if the battery voltage difference is less than or equal to the preset voltage difference, collect actual operating data of the power battery of the vehicle entering the second charging / discharging mode, and establish a reference database or predict the power battery life of the vehicle based on the actual operating data. The second charging / discharging mode is a different charging / discharging mode from the first charging / discharging mode. Establishing the reference database or predicting the power battery life of the vehicle based on the actual operating data includes: identifying the number of charging / discharging cycles in the historical operating data of the power battery; if the number of charging / discharging cycles is less than or equal to the preset number, establishing a reference database based on the actual operating data; if the number of charging / discharging 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. Predicting the power battery life of the vehicle based on the reference database and the actual operating data includes: identifying the data type of each data point in the actual operating data; determining the data weight of the corresponding data based on the data type; weighting all data according to 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.

7. 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, the processor executing the program to implement the microgrid charging and discharging management method according to any one of claims 1-5.

8. A vehicle, characterized in that, The vehicle is connected to a charging / discharging station, and the power grid control device of claim 7 controls the charging / discharging station to manage the charging and discharging of the vehicle.

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