Charging method, device, equipment, medium and product of vehicle power battery

Abstract

The application discloses a charging method, device and equipment of a vehicle power battery, a medium and a product, relates to the technical field of vehicle engineering, and comprises the following steps: determining a charging power dynamic threshold of a target vehicle at a current time according to power influencing factors of a target vehicle power battery at the current time; determining whether the target vehicle needs to be charged at the current time according to the current residual power of the target vehicle and the charging power dynamic threshold; if it is determined that the target vehicle needs to be charged, determining a power battery charging current value according to a first discharge current value of a target solar cell group and a load demand current value of the target vehicle, and controlling the target solar cell group to charge the target vehicle power battery according to the power battery charging current value. The application realizes the effect of supplementing the power of the vehicle power battery by using solar energy, and can guarantee the effect of improving the endurance of the vehicle due to the characteristics that the vehicle is driven on an open road for a long time, thereby meeting the demand of long-distance driving of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle engineering, and in particular to a charging method, device, equipment, medium and product for a vehicle power battery. BACKGROUND

[0002] With the increasing prominence of energy and environmental problems, vehicle enterprises have made considerable progress in the research and development of electric vehicles, and battery technology has made great progress. Users are increasingly accepting electric vehicles. When purchasing an electric vehicle, users are very concerned about the endurance problem.

[0003] Due to the convergence of the technical level of the power battery industry, the actual configurable power battery capacity of vehicles of various manufacturers is basically at the same level. How to extend the endurance of the vehicle has become the focus of each host manufacturer.

[0004] In the prior art, the endurance of the vehicle is usually extended by optimizing the battery management system to reduce power consumption. However, the endurance of the vehicle extended in this way is limited and cannot meet the needs of long-distance driving. SUMMARY

[0005] The present application provides a charging method, device, equipment, medium and product for a vehicle power battery to solve the problem that the effect of extending the endurance of an electric vehicle in the prior art is limited and cannot meet the needs of long-distance driving.

[0006] According to an aspect of the present application, a charging method for a vehicle power battery is provided, the method comprising:

[0007] In the case where the target vehicle is in a starting state, a charging power dynamic threshold value of the target vehicle at the current time is determined according to the power influencing factors of the target vehicle power battery at the current time;

[0008] According to the current remaining power of the target vehicle and the charging power dynamic threshold value, it is determined whether the target vehicle needs to be charged at the current time;

[0009] If it is determined that the target vehicle needs to be charged at the current time, a power battery charging current value is determined according to a first discharge current value of a target solar cell group and a load demand current value of the target vehicle, and the target solar cell group is controlled to charge the target vehicle power battery according to the power battery charging current value; wherein the target solar cell group is installed on the target vehicle.

[0010] According to another aspect of the present application, a charging device for a vehicle power battery is provided, the device comprising:

[0011] The charging power dynamic threshold determination module is configured to determine a charging power dynamic threshold of the target vehicle at the current time according to factors affecting the power battery of the target vehicle at the current time, when the target vehicle is in a starting state.

[0012] The charging demand identification module is configured to determine whether the target vehicle needs to be charged at the current time according to the current residual power of the target vehicle and the charging power dynamic threshold.

[0013] The vehicle power battery charging module is configured to determine a power battery charging current value according to the first discharging current value of the target solar battery pack and the load demand current value of the target vehicle, and control the target solar battery pack to charge the power battery of the target vehicle according to the power battery charging current value, if it is determined that the target vehicle needs to be charged at the current time. The target solar battery pack is installed on the target vehicle.

[0014] According to another aspect of the present application, an electronic device is provided, which comprises:

[0015] at least one processor; and

[0016] a memory connected to the at least one processor in communication; wherein

[0017] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the charging method of the vehicle power battery according to any one of the present application.

[0018] According to another aspect of the present application, a computer readable storage medium is provided, which stores computer instructions for enabling a processor to implement the charging method of the vehicle power battery according to any one of the present application when executed by the processor.

[0019] According to another aspect of the present application, a computer program product is provided, which comprises a computer program for implementing the charging method of the vehicle power battery according to any one of the present application when executed by a processor.

[0020] The application determines that the target vehicle needs to be charged at the current time, then determines the power battery charging current value according to the first discharge current value of the target solar cell group and the load demand current value of the target vehicle, and controls the target solar cell group to charge the power battery of the target vehicle according to the power battery charging current value, so as to realize the effect of supplementing the power battery of the vehicle by using solar energy. Due to the characteristics of long-time driving of the vehicle on open road, the effect of improving the endurance of the vehicle can be ensured, the demand of long-distance driving of the vehicle is met, and the market of the electric vehicle is further expanded.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 A flow chart of a charging method of a vehicle power battery provided by the first embodiment of the application is shown in the figure.

[0024] Figure 2 A flow chart of a charging method of a vehicle power battery provided by the second embodiment of the application is shown in the figure.

[0025] Figure 3 A structural schematic diagram of a charging device of a vehicle power battery provided by the third embodiment of the application is shown in the figure.

[0026] Figure 4 A structural schematic diagram of an electronic device for realizing the charging method of the vehicle power battery is shown in the figure. DETAILED DESCRIPTION

[0027] In order to make the person skilled in the art better understand the application scheme, the technical solutions in the embodiments of the application will be described clearly and completely below in combination with the drawings of the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the application.

[0028] It should be noted that the terms "first", "second", "candidate", "target" and the like in the description, claims, and drawings of the application are intended to distinguish between similar objects but are not necessarily used to describe a particular sequential or chronological order. It will be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in sequences other than those illustrated or described herein. Moreover, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, processes, methods, systems, products, or devices that include a list of steps or units as processes, methods, systems, products, or devices not necessarily limited to those clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0029] Embodiment one

[0030] Figure 1 A flowchart of a charging method for a vehicle power battery is provided for the first embodiment of the application. The embodiment can be applied to the case of supplementing the vehicle power battery with solar energy. The method can be performed by a charging device of the vehicle power battery, which can be realized in the form of hardware and / or software. As shown in Figure 1 , the method comprises:

[0031] S101, in the case that the target vehicle is in a starting state, determining a charging power dynamic threshold of the target vehicle at the current time according to power influencing factors of the target vehicle power battery at the current time.

[0032] Wherein, the target vehicle refers to any vehicle equipped with a power battery. According to the power system structure, the types of target vehicles include but are not limited to pure electric vehicle type, plug-in hybrid vehicle type or extended range vehicle type, etc. According to the vehicle use, the types of target vehicles include but are not limited to passenger vehicles or traction vehicles, etc. The target vehicle power battery refers to the power battery equipped on the target vehicle. The power battery is a rechargeable energy storage device specially designed for providing driving energy for vehicles.

[0033] The power influencing factors refer to at least one influencing factor that will affect the capacity of the power battery. The charging power dynamic threshold refers to the power threshold for determining whether the target vehicle needs to be charged. It can be understood that if the current remaining power is greater than or equal to the charging power dynamic threshold, it means that the current remaining power of the target vehicle is sufficient, i.e. the target vehicle does not need to be charged; if the current remaining power is less than the charging power dynamic threshold, it means that the current remaining power of the target vehicle is insufficient, i.e. the target vehicle needs to be charged.

[0034] Since the capacity of the power battery is affected by the power influencing factors, if a fixed threshold of the charging power is set to determine whether the target vehicle needs to be charged, there is a problem of inaccurate charging demand identification. Therefore, the embodiment determines a dynamic threshold of the charging power according to the power influencing factors, so as to improve the accuracy of the charging demand identification.

[0035] In an embodiment, the following method is used to identify whether the target vehicle is in the starting state:

[0036] 1) The current sensor is used to detect the main loop current of the power battery of the target vehicle in real time. When the continuous current output is detected and the duration exceeds the preset threshold, it is determined that the target vehicle is in the starting state.

[0037] 2) The battery management system is used to determine whether the preset number of heartbeat signals sent by the controller ECU at a fixed frequency is received. If yes, it is determined that the target vehicle is in the starting state.

[0038] 3) It is determined whether at least one of the following fault codes exists in the target vehicle: battery management system error, motor insulation fault and controller communication timeout. If no, it is determined that the target vehicle is in the starting state.

[0039] 4) The motor Hall sensor signal is detected. If three-phase signal changes are continuously detected, and the change frequency is greater than the preset threshold, it is determined that the target vehicle is in the starting state.

[0040] Further, in the case where it is determined that the target vehicle is in the starting state, at least one power influencing factor of the power battery of the target vehicle at the current time is obtained, and the initial threshold of the charging power pre-configured is adaptively adjusted according to various power influencing factors, so as to generate a dynamic threshold of the charging power specific to the target vehicle at the current time.

[0041] Optionally, the power influencing factors include at least one of the battery health state value, the battery temperature value and the second discharge current value.

[0042] The battery health state value is also known as SOH (Battery Health Status), which is a key indicator for measuring the difference between the current performance and the initial performance of the battery, and is used to evaluate the aging degree and the remaining life of the battery. It can be understood that the lower the battery health state value of the power battery of the target vehicle, the lower the capacity of the power battery of the target vehicle, and therefore a higher dynamic threshold of the charging power should be set to prevent the capacity of the power battery of the target vehicle from being too low and affecting the driving safety.

[0043] The battery temperature value is a core parameter for measuring the working state of the battery, which represents the temperature state of the battery during the charging and discharging process due to the accumulation of heat generated by internal electrochemical reactions, electron migration and energy loss. It can be understood that when the battery temperature value of the target vehicle power battery is too low or too high, the capacity of the target vehicle power battery is lower, so a higher charging power dynamic threshold should be set to prevent the capacity of the target vehicle power battery from being too low and affecting driving safety.

[0044] The second discharge current value refers to the discharge current value of the target vehicle power battery at the current moment. It can be understood that the larger the second discharge current value of the target vehicle power battery, the lower the capacity of the target vehicle power battery, so a higher charging power dynamic threshold should be set to prevent the capacity of the target vehicle power battery from being too low and affecting driving safety.

[0045] S102, according to the current remaining power of the target vehicle and the charging power dynamic threshold, it is determined whether the target vehicle needs to be charged at the current moment.

[0046] Among them, the current remaining power refers to the remaining battery capacity of the target vehicle power battery of the target vehicle at the current moment.

[0047] In an embodiment, the current remaining power and the charging power dynamic threshold are compared in value, and according to the size relationship between the current remaining power and the charging power dynamic threshold, it is determined whether the target vehicle needs to be charged at the current moment.

[0048] In another embodiment, the current remaining power is subtracted from the charging power dynamic threshold to perform a difference operation to determine the power difference between the current remaining power and the charging power dynamic threshold. In the case where the power difference is greater than or equal to zero, it is determined that the target vehicle does not need to be charged at the current moment; in the case where the power difference is less than zero, it is determined that the target vehicle needs to be charged at the current moment.

[0049] S103, if it is determined that the target vehicle needs to be charged at the current moment, the power battery charging current value is determined according to the first discharge current value of the target solar cell group and the load demand current value of the target vehicle, and the target solar cell group is controlled to charge the target vehicle power battery according to the power battery charging current value.

[0050] Among them, the target solar cell group is installed on the target vehicle. The target solar cell group is connected with the target solar panel. The target solar panel is based on the photoelectric effect, and the semiconductor material absorbs the photon energy of sunlight to make the electron transition to generate current to form direct current output, which is used to convert solar energy into electric energy. The target solar cell group is integrated by a plurality of solar cell pieces through packaging technology, which is used to store the electric energy converted by the target solar panel.

[0051] The first discharge current value refers to the maximum discharge current value that the target solar cell group can output. The load demand current value refers to the total current value required for driving all electrical equipment of the target vehicle to normally operate under the current working condition.

[0052] In an embodiment, if it is determined that the target vehicle needs to be charged at the current time, the size relationship between the first discharge current value and the load demand current value is determined. If it is determined that the first discharge current value is greater than the load demand current value, it means that the maximum discharge current value (the first discharge current value) output by the target solar cell group can meet the total current value (the load demand current value) required for driving all electrical equipment of the target vehicle to normally operate, and the target vehicle power battery can also be charged at the same time. Therefore, the power battery charging current value is determined according to the difference between the first discharge current value and the load demand current value. Further, the target solar cell group is controlled to charge the target vehicle power battery according to the power battery charging current value.

[0053] The embodiment of the present application has the beneficial effects that, by determining the charging capacity dynamic threshold of the target vehicle at the current time according to the influencing factors of the power battery of the target vehicle at the current time when the target vehicle is in the starting state, determining whether the target vehicle needs to be charged at the current time according to the current remaining capacity of the target vehicle and the charging capacity dynamic threshold, and determining the power battery charging current value according to the first discharge current value of the target solar cell group and the load demand current value of the target vehicle and controlling the target solar cell group to charge the target vehicle power battery according to the power battery charging current value when it is determined that the target vehicle needs to be charged at the current time, the effects of charging the power battery of the vehicle by using solar energy are realized.

[0054] In the first aspect, the effect of charging the power battery of the vehicle by using solar energy is realized. Due to the characteristics of long-time driving of the vehicle on open road, the effect of improving the endurance of the vehicle is ensured, the demand of long-distance driving of the vehicle is met, and the market of electric vehicles is further opened.

[0055] In the second aspect, since the power battery charging current value is determined according to the first discharge current value and the load demand current value, the load demand current value of the target vehicle can be met under the premise of charging the power battery of the target vehicle.

[0056] In the third aspect, since whether the target vehicle needs to be charged at the current time is determined according to the charging capacity dynamic threshold, compared with the determination method based on the fixed threshold of the charging capacity, the accuracy and reliability of the determination of the charging demand can be further improved.

[0057] Embodiment two

[0058] Figure 2A flowchart of a charging method of a vehicle power battery is provided for the second embodiment of the present application, the present embodiment is further optimized and expanded on the basis of the above-mentioned embodiments, and can be combined with the above-mentioned optional embodiments. As shown in FIG. 12, the method comprises the following steps. Figure 2

[0059] S201, in the case that the target vehicle is in a starting state, determining a target charging capacity initial threshold value associated with the battery health state value from the candidate charging capacity initial threshold value according to the association relationship between the candidate battery health state value and the candidate charging capacity initial threshold value.

[0060] In the present embodiment, the association relationship between the candidate battery health state value and the candidate charging capacity initial threshold value is pre-set, the candidate battery health state value is a set of all possible battery health state values of the target vehicle power battery, and the candidate charging capacity initial threshold value is a charging capacity initial threshold value set according to different candidate battery health state values. For example, assuming that any candidate battery health state value is 85%, the corresponding candidate charging capacity initial threshold value 25% is set for the candidate battery health state value.

[0061] It can be understood that according to the battery health state value of the target vehicle, the association relationship between the candidate battery health state value and the candidate charging capacity initial threshold value can be used to determine the candidate charging capacity initial threshold value associated with the battery health state value of the target vehicle as the target charging capacity initial threshold value.

[0062] S202, determining a first charging capacity influence coefficient according to a temperature difference value between the battery temperature value and a temperature threshold value and a temperature influence coefficient, and determining a charging capacity intermediate threshold value according to the target charging capacity initial threshold value and the first charging capacity influence coefficient.

[0063] The temperature threshold value refers to a temperature value corresponding to the case that the battery temperature value does not affect the capacity of the target vehicle power battery, for example, 25℃. It can be understood that when the battery temperature value is higher or lower than the temperature threshold value, it will have a negative impact on the capacity of the target vehicle power battery, and the greater the temperature difference between the battery temperature value and the temperature threshold value, the greater the negative impact on the capacity of the target vehicle power battery. The temperature influence coefficient can be set and adjusted according to experience.

[0064] For example, assuming that the temperature threshold value is 25℃, the battery temperature value is 10℃, and the temperature influence coefficient is 0.02, the first charging capacity influence coefficient is 1+0.02*(25-10)=1.3.

[0065] Assuming that the target charging capacity initial threshold value is 25%, the charging capacity intermediate threshold value is 25%*1.3=32.5%.

[0066] ​S203, determining a second charging capacity influence coefficient according to a size relationship between the second discharge current value and the discharge current threshold value, and determining the charging capacity dynamic threshold value according to the charging capacity intermediate threshold value and the second charging capacity influence coefficient.

[0067] The discharge current threshold value is used to determine whether the second discharge current value will have a negative impact on the target vehicle power battery capacity, that is, when the second discharge current value is greater than the discharge current threshold value, it means that the second discharge current value will have a negative impact on the target vehicle power battery capacity. The second charging capacity influence coefficient is a fixed coefficient which takes effect when the second discharge current value is greater than the discharge current threshold value, and it can be set and adjusted according to experience.

[0068] For example, assuming that the discharge current threshold value is 1C, and C represents the discharge rate of the target vehicle power battery. When the second discharge current value is greater than 1C, it means that the second discharge current value will have a negative impact on the target vehicle power battery capacity, and then the charging capacity dynamic threshold value is determined according to the sum of the charging capacity intermediate threshold value and the second charging capacity influence coefficient. Assuming that the charging capacity intermediate threshold value is 32.5%, and the second charging capacity influence coefficient is 5%, then the charging capacity dynamic threshold value is 32.5%+5%=37.5%. That is, when the current remaining capacity of the target vehicle is less than 37.5%, it is determined that the target vehicle needs to be charged at the current time.

[0069] By determining the target charging capacity initial threshold value associated with the battery health state value from the candidate charging capacity initial threshold value according to the correlation between the candidate battery health state value and the candidate charging capacity initial threshold value; determining the first charging capacity influence coefficient according to the temperature difference between the battery temperature value and the temperature threshold value and the temperature influence coefficient, and determining the charging capacity intermediate threshold value according to the target charging capacity initial threshold value and the first charging capacity influence coefficient; determining the second charging capacity influence coefficient according to the size relationship between the second discharge current value and the discharge current threshold value, and determining the charging capacity dynamic threshold value according to the charging capacity intermediate threshold value and the second charging capacity influence coefficient, the beneficial effects are:

[0070] Firstly, the threshold value is adjusted according to the battery health state value, which avoids the problem of overcharging for high battery health state value batteries or undercharging for low battery health state value batteries, prolongs the battery life, and reduces the aging rate.

[0071] Secondly, the threshold value is dynamically corrected by the battery temperature value, which reduces the risk of thermal runaway caused by high-rate discharge, and improves safety and reliability.

[0072] Thirdly, the threshold value is adjusted according to the size of the discharge current value, which prevents voltage drop caused by excessive instantaneous power demand, and improves safety and reliability.

[0073] In the fourth aspect, the dynamic adjustment mechanism of multi-parameter fusion is used to balance the battery life, safety and energy efficiency, and is particularly suitable for the scene of electric vehicles with strict requirements for battery management.

[0074] In S204, the current remaining power and the charging power dynamic threshold are compared in value. If the current remaining power is less than the charging power dynamic threshold, it is determined that the target vehicle needs to be charged at the current time.

[0075] For example, assuming that the charging power dynamic threshold is 37.5%, and the current remaining power is 40%, that is, the current remaining power is greater than the charging power dynamic threshold, it is determined that the target vehicle does not need to be charged at the current time.

[0076] For example, assuming that the charging power dynamic threshold is 37.5%, and the current remaining power is 35%, that is, the current remaining power is less than the charging power dynamic threshold, it is determined that the target vehicle needs to be charged at the current time.

[0077] By comparing the current remaining power and the charging power dynamic threshold in value, if the current remaining power is less than the charging power dynamic threshold, it is determined that the target vehicle needs to be charged at the current time, which has the beneficial effects of:

[0078] In the first aspect, the battery is charged in time when the current remaining power is lower than the charging power dynamic threshold, which prevents the battery from entering a deep discharge state and causing the battery internal resistance to increase and accelerate capacity attenuation, thereby prolonging the service life of the battery.

[0079] In the second aspect, the battery performance degradation is delayed and the battery maintenance frequency is reduced by precisely controlling the charging and discharging depth.

[0080] In the third aspect, the number of invalid charging and discharging times is reduced, the overall energy consumption is reduced, and resource waste is reduced by precise charging.

[0081] In S205, if it is determined that the target vehicle needs to be charged at the current time, the size relationship between the first discharge current value and the load demand current value is determined, and in the case that the first discharge current value is greater than the load demand current value, the power battery charging current value is determined according to the current difference between the first discharge current value and the load demand current value.

[0082] For example, assuming that the first discharge current value is 120A and the load demand current value is 100A, that is, the first discharge current value is greater than the load demand current value, the current difference between the first discharge current value and the load demand current value is determined: 120A-100A=20A, which is the power battery charging current value that can be used to charge the target vehicle power battery.

[0083] By determining the size relationship between the first discharge current value and the load demand current value, and in the case that the first discharge current value is greater than the load demand current value, the power battery charging current value is determined according to the current difference between the first discharge current value and the load demand current value, and the beneficial effects are as follows:

[0084] In the first aspect, when the first discharge current value of the solar cell group is greater than the load demand current value, the power battery charging current value is calculated by the difference, the excess energy can be directly stored, the solar energy is avoided from being wasted, and the solar energy utilization rate is maximized.

[0085] In the second aspect, the power battery charging current value is dynamically matched, the target vehicle power battery can be prevented from being overheated due to the excessive charging current when the light is sufficient, or the target vehicle load can be prevented from being powered off due to the insufficient discharge current when the light is insufficient.

[0086] In the third aspect, the power battery charging current value is accurately calculated, and the overcharging risk caused by the charging with a fixed value is avoided.

[0087] Optionally, after the size relationship between the first discharge current value and the load demand current value is determined, the method further includes:

[0088] In the case that the first discharge current value is greater than the load demand current value, the target solar cell group is controlled to supply power to the load of the target vehicle according to the load demand current value.

[0089] For example, it is assumed that the first discharge current value is 120A, the load demand current value is 100A, that is, the first discharge current value is greater than the load demand current value, and the target solar cell group is controlled to output a 100A current to supply power to the load of the target vehicle.

[0090] In the case that the first discharge current value is greater than the load demand current value, the target solar cell group is controlled to supply power to the load of the target vehicle according to the load demand current value, so that in the case that the first discharge current value is greater than the load demand current value, the solar energy can be used to supplement the power of the target vehicle power battery, and the solar energy can also be used to supply power to the load of the target vehicle, and the utilization efficiency of the solar energy is improved.

[0091] S206, the target solar cell group is controlled to charge the target vehicle power battery according to the power battery charging current value.

[0092] Optionally, the method further includes:

[0093] A, determining the size relationship between the first discharge current value and the load demand current value.

[0094] B, in the case that the first discharge current value is less than the load demand current value, determining the power battery discharge current value according to the current difference between the first discharge current value and the load demand current value.

[0095] In an embodiment, in the case that the first discharge current value is less than the load demand current value, the current difference between the first discharge current value and the load demand current value is determined as the power battery discharge current value of the target vehicle power battery at the current time.

[0096] For example, assuming that the first discharge current value is 80A and the load demand current value is 100A, that is, the first discharge current value is less than the load demand current value, so the target solar cell group cannot meet the load demand current value only according to the first discharge current value, and the target vehicle power battery needs to provide output current to meet the load demand current value, and the power battery discharge current value of the target vehicle power battery is 100A-80A=20A.

[0097] C, controlling the target solar cell group to supply power to the load of the target vehicle according to the first discharge current value, and controlling the target vehicle power battery to supply power to the load of the target vehicle according to the power battery discharge current value.

[0098] For example, assuming that the first discharge current value is 80A, the load demand current value is 100A, and the power battery discharge current value is 20A, the target solar cell group is controlled to output 80A current to supply power to the load of the target vehicle, and the target vehicle power battery is controlled to output 20A current to supply power to the load of the target vehicle, so that the sum of the output current values of the target solar cell group and the target vehicle power battery meets the load demand current value 100A.

[0099] By determining the size relationship between the first discharge current value and the load demand current value, in the case that the first discharge current value is less than the load demand current value, determining the power battery discharge current value according to the current difference between the first discharge current value and the load demand current value, and controlling the target solar cell group to supply power to the load of the target vehicle according to the first discharge current value, and controlling the target vehicle power battery to supply power to the load of the target vehicle according to the power battery discharge current value, the beneficial effects are that:

[0100] In the first aspect, the first discharge current value of the solar cell is used preferentially to maximize the use of renewable energy and reduce the dependence on the target vehicle power battery.

[0101] In the second aspect, in the extreme case of continuous rainy days, the load can still be maintained by the power battery discharge current value of the target vehicle power battery, avoiding the paralysis risk of the traditional single power supply system, and realizing the effect of double power supply guarantee.

[0102] Optionally, the method further comprises:

[0103] determining the magnitude relationship between the first discharge current value and the load demand current value; and in the case that the first discharge current value is greater than or equal to the load demand current value, controlling the target vehicle power battery to stop discharging.

[0104] In an embodiment, the magnitude relationship between the first discharge current value and the load demand current value is determined, and in the case that the first discharge current value is greater than or equal to the load demand current value, it is indicated that the load demand current value can be met only according to the first discharge current value of the target solar cell group, and the target vehicle power battery does not need to provide output current at the same time, so the target vehicle power battery is controlled to stop discharging.

[0105] By determining the magnitude relationship between the first discharge current value and the load demand current value; in the case that the first discharge current value is greater than or equal to the load demand current value, the target vehicle power battery is controlled to stop discharging, which has the beneficial effects that:

[0106] First, when the first discharge current value of the target solar cell group exceeds the load demand current value of the whole vehicle, the target vehicle power battery is actively stopped from discharging at this time, which can avoid the destruction of the electrode structure caused by excessive lithium ion extraction of the lithium ion battery, thereby slowing down the capacity attenuation of the target vehicle power battery.

[0107] Second, if the target vehicle power battery continues to participate in power supply, it may bear a transient current exceeding its optimal discharge rate when the load suddenly changes, which causes the electrode material to accelerate aging. The target solar cell group as a buffer layer can reduce such risks.

[0108] Optionally, the method further comprises:

[0109] According to the whole vehicle voltage level of the target vehicle, the electrical energy of the target solar cell group is processed through the boost and current reduction circuit to output high-voltage electrical energy; and the first discharge current value of the target solar cell group is determined according to the high-voltage electrical energy.

[0110] The whole vehicle voltage level refers to the voltage level division standard suitable for different electrical equipment or circuits in the vehicle electrical system, such as 400V level, 800V level, etc.

[0111] In an embodiment, the electrical energy of the target solar cell group is input into the boost and current reduction circuit, the electrical energy of the target solar cell group is processed through the boost and current reduction circuit to output high-voltage electrical energy with a voltage value meeting the whole vehicle voltage level, and the first discharge current value that can be output by the target solar cell group is further determined according to the high-voltage electrical energy after the boost and current reduction.

[0112] The power of the target solar cell group is processed by the voltage boosting and current reducing circuit according to the whole vehicle voltage level of the target vehicle, and high-voltage power is output; the first discharge current value of the target solar cell group is determined according to the high-voltage power, and the beneficial effects are as follows:

[0113] In the first aspect, the target solar cell group directly outputs high-voltage power, which is seamlessly connected with the target vehicle power battery or whole vehicle load, and the effect of matching the whole vehicle high-voltage architecture is realized.

[0114] In the second aspect, the voltage of the solar cell group is boosted to the whole vehicle high-voltage level by the voltage boosting and current reducing circuit, the voltage is boosted to reduce the current value, thereby reducing the joule heat loss of the transmission line and improving the overall energy efficiency.

[0115] The embodiment also provides an actual implementation mode of a charging method of a vehicle power battery in a target vehicle, which comprises the following steps of:

[0116] The battery management system determines whether the current remaining power is lower than the charging power dynamic threshold value, and if yes, sends a solar charging request to the whole vehicle control system of the target vehicle. After receiving the request, the whole vehicle control system sends a solar charging instruction to the solar charging controller. The solar charging controller has the functions of signal transmission, voltage boosting and current reducing, and current and voltage stabilizing.

[0117] The solar charging controller controls the internal circuit to be connected, the target solar cell group transmits the converted solar energy into the solar charging controller, the power is converted into high-voltage power of the whole vehicle voltage level after passing through the voltage boosting and current reducing circuit, the high-voltage power flows out of the solar charging controller into the whole vehicle high-voltage distribution box after passing through the current and voltage stabilizing circuit, and at this time, the solar charging controller sends a signal containing the voltage and current information of the high-voltage power to the whole vehicle controller.

[0118] The whole vehicle controller transmits the signal to the battery management system, and the battery management system compares the first discharge current value of the target solar cell group with the load demand current value after receiving the signal.

[0119] If the first discharge current value is smaller than the load demand current value, the battery management system sends a signal containing the power battery discharge current value and the first discharge current value for the whole vehicle work to the whole vehicle controller. After receiving the signal, the whole vehicle controller sends a power allocation signal to the whole vehicle high-voltage distribution box, the first discharge current is directly used for the whole vehicle load work, and a feedback signal is sent to the whole vehicle controller, the signal is received by the whole vehicle controller and then transmitted to the battery management system, and the battery management system adjusts the target vehicle power battery discharge current to be reduced to the power battery discharge current value after receiving the signal.

[0120] If the first discharging current value is greater than the load demand current value, the battery management system calculates a power battery charging current value and sends a request charging instruction containing the power battery charging current value to the vehicle controller. After receiving the instruction, the vehicle controller sends a power distribution signal to the vehicle high-voltage distribution box, and the vehicle high-voltage distribution box directly uses a part of the discharging current of the target solar battery pack for the work of each load of the vehicle, and a part of the discharging current charges the target vehicle power battery, and feeds back a signal to the vehicle controller. After receiving the signal, the vehicle controller transmits it to the battery management system, and the battery management system receives the signal and adjusts the target vehicle power battery to stop discharging and receive the charging current from the vehicle high-voltage distribution box.

[0121] Embodiment three

[0122] Figure 3 A structural schematic diagram of a charging device for a vehicle power battery provided for embodiment three of the present application can be applied to the case of supplementing the power battery of the vehicle with solar energy, as shown in Figure 3 The device comprises:

[0123] A charging capacity dynamic threshold determination module 31 is configured to determine a charging capacity dynamic threshold of the target vehicle at a current time according to an electric quantity influencing factor of the target vehicle power battery at the current time in a case where the target vehicle is in a starting state.

[0124] A charging demand identification module 32 is configured to determine whether the target vehicle needs to be charged at the current time according to the current residual electric quantity of the target vehicle and the charging capacity dynamic threshold.

[0125] A vehicle power battery charging module 33 is configured to determine a power battery charging current value according to a first discharging current value of a target solar battery pack and a load demand current value of the target vehicle, and control the target solar battery pack to charge the target vehicle power battery according to the power battery charging current value if it is determined that the target vehicle needs to be charged at the current time. The target solar battery pack is installed on the target vehicle.

[0126] Optionally, the electric quantity influencing factor comprises at least one of a battery health state value, a battery temperature value, and a second discharging current value.

[0127] The charging capacity dynamic threshold determination module 31 is specifically configured to:

[0128] determine a target charging capacity initial threshold value associated with the battery health state value from the candidate charging capacity initial threshold value according to an association relationship between the candidate battery health state value and the candidate charging capacity initial threshold value.

[0129] determining a first charging power influence coefficient according to a temperature difference between the battery temperature value and a temperature threshold value and a temperature influence coefficient, and determining a charging power intermediate threshold value according to the target charging power initial threshold value and the first charging power influence coefficient;

[0130] determining a second charging power influence coefficient according to a size relationship between the second discharging current value and a discharging current threshold value, and determining the charging power dynamic threshold value according to the charging power intermediate threshold value and the second charging power influence coefficient.

[0131] Optionally, the charging demand identification module 32 is specifically configured to:

[0132] performing numerical comparison between the current residual power and the charging power dynamic threshold value;

[0133] determining that the target vehicle needs to be charged at the current time in a case where the current residual power is less than the charging power dynamic threshold value.

[0134] Optionally, the vehicle power battery charging module 33 is specifically configured to:

[0135] determining a size relationship between the first discharging current value and the load demand current value;

[0136] determining the power battery charging current value according to a current difference between the first discharging current value and the load demand current value in a case where the first discharging current value is greater than the load demand current value.

[0137] Optionally, the device further includes a first load power supply module, which is specifically configured to:

[0138] controlling the target solar cell group to supply power to the load of the target vehicle according to the load demand current value in a case where the first discharging current value is greater than the load demand current value.

[0139] Optionally, the device further includes a second load power supply module, which is specifically configured to:

[0140] determining a size relationship between the first discharging current value and the load demand current value;

[0141] determining a power battery discharging current value according to a current difference between the first discharging current value and the load demand current value in a case where the first discharging current value is less than the load demand current value.

[0142] The target solar cell group is controlled to supply power to the load of the target vehicle according to the first discharge current value, and the target vehicle power battery is controlled to supply power to the load of the target vehicle according to the power battery discharge current value.

[0143] Optionally, the device further comprises a stop discharging triggering module, specifically used for:

[0144] Determining the size relationship between the first discharge current value and the load demand current value.

[0145] In the case that the first discharge current value is greater than or equal to the load demand current value, the target vehicle power battery is controlled to stop discharging.

[0146] Optionally, the device further comprises a voltage boosting and current reducing module, specifically used for:

[0147] According to the whole vehicle voltage level of the target vehicle, the voltage boosting and current reducing circuit is used to process the electric energy of the target solar cell group, and output high-voltage electric energy.

[0148] The first discharge current value of the target solar cell group is determined according to the high-voltage electric energy.

[0149] The charging device for vehicle power battery provided by the embodiment of the application can execute the charging method for vehicle power battery provided by any embodiment of the application, and has the function modules and beneficial effects corresponding to the execution method.

[0150] According to the embodiments of the present disclosure, the present disclosure further provides an electronic device, a readable storage medium and a computer program product.

[0151] Embodiment four

[0152] Figure 4 A structural schematic diagram of an electronic device 40 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit implementations of the present application described and / or claimed in this document.

[0153] As Figure 4As shown, the electronic device 40 includes at least one processor 41, and a memory, such as a read-only memory (ROM) 42, a random access memory (RAM) 43, etc., connected to the at least one processor 41 in communication. The memory stores computer programs executable by the at least one processor 41, and the processor 41 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 42 or loaded from the storage unit 48 into the random access memory (RAM) 43. Various programs and data required for the operation of the electronic device 40 can also be stored in the RAM 43. The processor 41, the ROM 42, and the RAM 43 are connected to each other through a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0154] Various components in the electronic device 40 are connected to the I / O interface 45, including an input unit 46, such as a keyboard, a mouse, etc., an output unit 47, such as various types of displays, a speaker, etc., a storage unit 48, such as a magnetic disk, an optical disk, etc., and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0155] The processor 41 can be various general and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 41 performs various methods and processes described above, such as the charging method of the vehicle power battery.

[0156] In some embodiments, the charging method of the vehicle power battery can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 48. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 40 via the ROM 42 and / or the communication unit 49. When the computer program is loaded into the RAM 43 and executed by the processor 41, one or more steps of the charging method of the vehicle power battery described above can be performed. Alternatively, in other embodiments, the processor 41 can be configured to perform the charging method of the vehicle power battery by any other appropriate means, such as by means of firmware.

[0157] The various embodiments of the systems and techniques described above can be implemented in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a complex programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0158] Computer programs used to implement the processes of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer program

[0159] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0160] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0161] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0162] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0163] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present disclosure. For example, the steps recited in the present disclosure can be executed in parallel, executed in sequence, or executed in a different order, as long as the desired results of the present disclosure are achieved, and the present disclosure is not limited herein.

[0164] The specific embodiments described above are not intended to be limiting, and persons skilled in the art will appreciate that various modifications, combinations, sub-combinations and alternatives can be made to the specific embodiments without departing from the spirit and principles of the disclosure. Accordingly, the disclosure is not limited to the specific embodiments described above, but only by the scope of the appended claims.

Claims

1. A method for charging a vehicle power battery, characterized in that, The method includes: When the target vehicle is in the starting state, the dynamic threshold of the charging capacity of the target vehicle at the current moment is determined based on the factors affecting the current charge of the target vehicle's power battery. Based on the target vehicle's current remaining battery power and the dynamic charging power threshold, determine whether the target vehicle needs to be charged at the current moment; If it is determined that the target vehicle needs to be charged at the current moment, then the charging current value of the power battery is determined based on the first discharge current value of the target solar panel and the load demand current value of the target vehicle, and the target solar panel is controlled to charge the power battery of the target vehicle according to the charging current value of the power battery; wherein, the target solar panel is installed on the target vehicle; The factors affecting battery power include at least one of the following: battery health status value, battery temperature value, and second discharge current value. The step of determining the dynamic threshold of the charging capacity of the target vehicle at the current moment based on the factors affecting the battery capacity of the target vehicle at the current moment includes: Based on the correlation between candidate battery health status values ​​and candidate initial charging capacity thresholds, a target initial charging capacity threshold associated with the battery health status value is determined from the candidate initial charging capacity thresholds. Based on the temperature difference between the battery temperature value and the temperature threshold, and the temperature influence coefficient, a first charging capacity influence coefficient is determined, and based on the target initial charging capacity threshold and the first charging capacity influence coefficient, an intermediate charging capacity threshold is determined. Based on the relationship between the second discharge current value and the discharge current threshold, a second charging capacity influence coefficient is determined, and based on the charging capacity intermediate threshold and the second charging capacity influence coefficient, the charging capacity dynamic threshold is determined.

2. The method according to claim 1, characterized in that, The step of determining whether the target vehicle needs to be charged at the current moment based on the target vehicle's current remaining battery power and the dynamic threshold for charging power includes: Compare the current remaining battery power with the dynamic threshold of charging power. If the current remaining battery power is less than the dynamic threshold for charging power, it is determined that the target vehicle needs to be charged at the current moment.

3. The method according to claim 1, characterized in that, The step of determining the charging current value of the power battery based on the first discharge current value of the target solar cell array and the load demand current value of the target vehicle includes: Determine the magnitude relationship between the first discharge current value and the load demand current value; If the first discharge current value is greater than the load demand current value, the charging current value of the power battery is determined based on the current difference between the first discharge current value and the load demand current value.

4. The method according to claim 3, further comprising, after determining the magnitude relationship between the first discharge current value and the load demand current value: If the first discharge current value is greater than the load demand current value, the target solar cell array is controlled to supply power to the load of the target vehicle according to the load demand current value.

5. The method according to claim 1, further comprising: Determine the magnitude relationship between the first discharge current value and the load demand current value; If the first discharge current value is less than the load demand current value, the power battery discharge current value is determined based on the current difference between the first discharge current value and the load demand current value. The target solar cell array is controlled to supply power to the load of the target vehicle according to the first discharge current value, and the target vehicle power battery is controlled to supply power to the load of the target vehicle according to the power battery discharge current value.

6. The method according to claim 1, further comprising: Determine the magnitude relationship between the first discharge current value and the load demand current value; If the first discharge current value is greater than or equal to the load demand current value, the target vehicle power battery is controlled to stop discharging.

7. The method according to claim 1, further comprising, before determining the power battery charging current value based on the first discharge current value of the target solar cell array and the load demand current value of the target vehicle: Based on the overall voltage level of the target vehicle, the electrical energy of the target solar cell array is processed through a boost-down current circuit to output high-voltage electrical energy; The first discharge current value of the target solar cell array is determined based on the high-voltage electrical energy.

8. A charging device for a vehicle power battery, characterized in that, The device includes: The dynamic threshold for charging capacity determination module is used to determine the dynamic threshold for charging capacity of the target vehicle at the current moment based on the factors affecting the current capacity of the target vehicle's power battery when the target vehicle is in the starting state. The charging demand identification module is used to determine whether the target vehicle needs to be charged at the current moment based on the current remaining battery power of the target vehicle and the dynamic threshold of the charging power. A vehicle power battery charging module is used to determine a power battery charging current value based on the first discharge current value of the target solar panel and the load demand current value of the target vehicle if it is determined that the target vehicle needs to be charged at the current moment, and to control the target solar panel to charge the power battery of the target vehicle according to the power battery charging current value; wherein the target solar panel is installed on the target vehicle; The factors affecting battery power include at least one of the following: battery health status value, battery temperature value, and second discharge current value. The dynamic threshold determination module for charging capacity is specifically used for: Based on the correlation between candidate battery health status values ​​and candidate initial charging capacity thresholds, a target initial charging capacity threshold associated with the battery health status value is determined from the candidate initial charging capacity thresholds. Based on the temperature difference between the battery temperature value and the temperature threshold, and the temperature influence coefficient, a first charging capacity influence coefficient is determined, and based on the target initial charging capacity threshold and the first charging capacity influence coefficient, an intermediate charging capacity threshold is determined. Based on the relationship between the second discharge current value and the discharge current threshold, a second charging capacity influence coefficient is determined, and based on the charging capacity intermediate threshold and the second charging capacity influence coefficient, the charging capacity dynamic threshold is determined.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the charging method for the vehicle power battery according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a processor to execute the charging method for a vehicle power battery according to any one of claims 1-7.

11. A computer program product comprising a computer program that, when executed by a processor, implements a charging method for a vehicle power battery according to any one of claims 1-7.

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