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

Abstract

The invention discloses a vehicle power battery charging method, device, equipment, medium and product, and relates to the technical field of vehicle engineering.The method comprises the steps that a charging electric quantity dynamic threshold value of a target vehicle at the current moment is determined according to an electric quantity influence factor of a power battery of the target vehicle at the current moment; determining whether the target vehicle needs to be charged at the current moment according to the current residual electric quantity and the charging electric quantity dynamic threshold value of the target vehicle; if it is determined that the target vehicle needs to be charged, a power battery charging current value is determined according to the first discharging current value of the target solar battery pack and the load demand current value of the target vehicle, and the target solar battery pack is controlled to charge a power battery of the target vehicle according to the power battery charging current value. The effect of supplementing energy to the vehicle power battery through solar energy is achieved, due to the characteristic that the vehicle runs on an open road for a long time, the effect of prolonging the endurance of the vehicle can be guaranteed, and the requirement for long-distance running of the vehicle is met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and particularly to a charging method, device, equipment, medium and product for a vehicle power battery. Background Art

[0002] With the increasingly prominent energy and environmental problems, vehicle manufacturers have made considerable progress in the research and development of electric vehicle models. Battery technology has advanced significantly, and users' acceptance of electric vehicle models has increased day by day. When purchasing an electric vehicle model, users are very concerned about the cruising range.

[0003] Due to the similarity of the technical levels in the power battery industry, the actually configurable power battery capacities of vehicles from various manufacturers are basically at the same level. How to extend the vehicle cruising range has become the focus of attention of each vehicle manufacturer.

[0004] In the prior art, usually the method of optimizing the battery management system to reduce power consumption is adopted to extend the vehicle cruising range. However, the cruising range extended by this method is limited and cannot meet the needs of long-distance vehicle driving. Summary of the Invention

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

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

[0007] When the target vehicle is in a starting state, determine a dynamic threshold of the charging power of the target vehicle at the current moment according to the factors affecting the power of the target vehicle power battery at the current moment;

[0008] Determine whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the dynamic threshold of the charging power;

[0009] If it is determined that the target vehicle needs to be charged at the current moment, determine a power battery charging current value according to the first discharge 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 target vehicle power battery according to the power battery charging current value; wherein, the target solar battery pack is installed on the target vehicle.

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

[0011] A charging power dynamic threshold determination module, configured to determine a charging power dynamic threshold of the target vehicle at the current moment according to the power influencing factors of the power battery of the target vehicle when the target vehicle is in a starting state;

[0012] A charging demand identification module, configured to determine whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the charging power dynamic threshold;

[0013] A vehicle power battery charging module, configured to, if it is determined that the target vehicle needs to be charged at the current moment, determine a power battery charging current value according to the first discharge current value of the target solar cell array and the load demand current value of the target vehicle, and control the target solar cell array to charge the power battery of the target vehicle according to the power battery charging current value; wherein, the target solar cell array is installed on the target vehicle.

[0014] According to another aspect of the present invention, there is provided an electronic device, which includes:

[0015] At least one processor; and

[0016] A memory communicatively connected to the at least one processor; 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 so that the at least one processor can execute the charging method of the vehicle power battery according to any one of the present invention.

[0018] According to another aspect of the present invention, there is provided a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to implement the charging method of the vehicle power battery according to any one of the present invention when executed by a processor.

[0019] According to another aspect of the present invention, there is provided a computer program product, including a computer program, and the computer program implements the charging method of the vehicle power battery according to any one of the present invention when executed by a processor.

[0020] When it is determined that the target vehicle needs to be charged at the current moment, the charging current value of the power battery is determined according to the first discharge current value of the target solar battery pack and the load demand current value of the target vehicle, and the target solar battery pack is controlled to charge the power battery of the target vehicle according to the charging current value of the power battery, thereby achieving the effect of supplementing the power battery of the vehicle with solar energy. Due to the characteristics of the vehicle driving on the open road for a long time, the effect of improving the vehicle's endurance can be guaranteed, meeting the needs of the vehicle for long-distance driving, and being beneficial to further expanding the market of electric vehicle models.

[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 present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a flowchart of a method for charging a vehicle power battery provided in Embodiment 1 of the present invention;

[0024] Figure 2 It is a flowchart of a method for charging a vehicle power battery provided in Embodiment 2 of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a device for charging a vehicle power battery provided in Embodiment 3 of the present invention;

[0026] Figure 4 It is a schematic structural diagram of an electronic device for implementing the method for charging a vehicle power battery according to the embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", "candidate", "target", etc. in the specification, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 FIG. is a flowchart of a method for charging a vehicle power battery provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of supplementing energy to the vehicle power battery using solar energy. This method can be executed by a charging device of the vehicle power battery, and the charging device of the vehicle power battery can be implemented in the form of hardware and / or software. As Figure 1 shown, the method includes:

[0031] S101. When the target vehicle is in a starting state, determine a dynamic threshold of the charging power of the target vehicle at the current moment according to the factors affecting the power of the target vehicle power battery at the current moment.

[0032] Among them, the target vehicle refers to any vehicle equipped with a power battery. From the perspective of the power system structure, the types of target vehicles include but are not limited to pure electric vehicle models, plug-in hybrid vehicle models, or range-extended vehicle models, etc.; from the perspective of vehicle use, the types of target vehicles include but are not limited to passenger vehicles or tractors, etc. The target vehicle power battery refers to the power battery carried by the target vehicle, and the power battery is a rechargeable energy storage device specifically designed to provide driving energy for the vehicle.

[0033] The factors affecting the power refer to at least one factor that affects the capacity of the power battery. The dynamic threshold of the charging power refers to the power threshold used to determine 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 dynamic threshold of the charging power, it means that the current remaining power of the target vehicle is sufficient, that is, the target vehicle does not need to be charged; if the current remaining power is less than the dynamic threshold of the charging power, it means that the current remaining power of the target vehicle is insufficient, that is, the target vehicle needs to be charged.

[0034] Since the capacity of the power battery is affected by factors related to the battery charge level, setting a fixed threshold for the charging level to determine whether the target vehicle needs to be charged may lead to inaccurate identification of the charging requirement. Therefore, in this embodiment, a dynamic threshold for the charging level will be determined based on the factors related to the battery charge level to improve the accuracy of identifying the charging requirement.

[0035] In one implementation, the following method is used to identify whether the target vehicle is in a starting state:

[0036] 1) The main circuit current of the power battery of the target vehicle is continuously detected by a current sensor. When a continuous current output is detected and the duration exceeds a preset threshold, it is determined that the target vehicle is in a starting state.

[0037] 2) It is determined by the battery management system whether a preset number of heartbeat signals are continuously sent by the controller ECU at a fixed frequency. If so, it is determined that the target vehicle is in a starting state.

[0038] 3) It is determined whether the target vehicle has at least one of the following fault codes: battery management system error, motor insulation fault, and controller communication timeout. If not, it is determined that the target vehicle is in a starting state.

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

[0040] Furthermore, when it is determined that the target vehicle is in a starting state, at least one factor related to the battery charge level of the target vehicle at the current moment is obtained, and the initial threshold for the charging level pre-configured is adaptively adjusted according to various factors related to the battery charge level to generate a unique dynamic threshold for the charging level of the target vehicle at the current moment.

[0041] Optionally, the factors related to the battery charge level include at least one of the battery health status value, the battery temperature value, and the second discharge current value.

[0042] Among them, the battery health status value, also known as SOH (Battery Health Status), 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 degree of battery aging and the remaining life. It can be understood that when the battery health status value of the power battery of the target vehicle is lower, the capacity of the power battery of the target vehicle is lower. Therefore, a higher dynamic threshold for the charging level should be set to prevent the capacity of the power battery of the target vehicle from being too low, which may affect driving safety.

[0043] The battery temperature value is a core parameter for measuring the working state of the battery, which refers to the temperature state shown by the heat accumulation generated by the internal electrochemical reaction, electron migration and energy loss during the charging and discharging process of the battery. It can be understood that when the battery temperature value of the power battery of the target vehicle is too low or too high, the capacity of the power battery of the target vehicle is lower. 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 driving safety.

[0044] The second discharge current value refers to the discharge current value of the power battery of the target vehicle at the current moment. It can be understood that when the second discharge current value of the power battery of the target vehicle is larger, the capacity of the power battery of the target vehicle is lower. 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 driving safety.

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

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

[0047] In one implementation, compare the current remaining power with the dynamic threshold of the charging power, and determine whether the target vehicle needs to be charged at the current moment according to the magnitude relationship between the current remaining power and the dynamic threshold of the charging power.

[0048] In another implementation, perform a difference operation by subtracting the dynamic threshold of the charging power from the current remaining power to determine the power difference between the current remaining power and the dynamic threshold of the charging power. When 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; when 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, then determine the charging current value of the power battery according to the first discharge 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 charging current value of the power battery.

[0050] Among them, the target solar battery pack is installed on the target vehicle. The target solar battery pack is connected to the target solar panel. Based on the photovoltaic effect, the target solar panel absorbs the photon energy of sunlight through semiconductor materials, causing electrons to transition to generate current to form direct current output, which is used to directly convert solar energy into electrical energy. The target solar battery pack is integrated by multiple solar cells through packaging technology and is used to store the electrical 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 pack can output. The load demand current value refers to the total current value required for driving all electrical devices of the target vehicle to operate normally under the current working conditions of the vehicle.

[0052] In one implementation, if it is determined that the target vehicle needs to be charged at the current moment, the magnitude 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 pack can meet the total current value (the load demand current value) required for driving all electrical devices of the vehicle to operate normally, and can also charge the power battery of the target vehicle at the same time. Therefore, the charging current value of the power battery is determined according to the difference between the first discharge current value and the load demand current value. Further, the target solar cell pack is controlled to charge the power battery of the target vehicle according to the charging current value of the power battery.

[0053] In the embodiment of the present invention, when the target vehicle is in the starting state, according to the factors affecting the power of the power battery of the target vehicle at the current moment, the dynamic charging power threshold of the target vehicle at the current moment is determined; according to the current remaining power of the target vehicle and the dynamic charging power threshold, it is determined 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 according to the first discharge current value of the target solar cell pack and the load demand current value of the target vehicle, the charging current value of the power battery is determined, and the target solar cell pack is controlled to charge the power battery of the target vehicle according to the charging current value of the power battery. The beneficial effects are as follows:

[0054] First, the effect of using solar energy to supplement the power of the vehicle's power battery is achieved. Due to the characteristics of the vehicle driving on the open road for a long time, the effect of improving the vehicle's endurance can be guaranteed, meeting the needs of long-distance driving of the vehicle, which is beneficial to further expanding the market of electric vehicle models.

[0055] Second, since the charging current value of the power battery is determined according to the first discharge current value and the load demand current value, on the premise of charging the power battery of the target vehicle, the load demand current value of the target vehicle can also be guaranteed to be met.

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

[0057] Embodiment 2

[0058] Figure 2The flowchart of a charging method for a vehicle power battery provided in the second embodiment of the present invention further optimizes and expands the above embodiment and can be combined with each of the above optional implementation manners. As Figure 2 shown, the method includes:

[0059] S201. When the target vehicle is in a starting state, determine a target initial charging power threshold associated with the battery health state value from the candidate initial charging power thresholds according to the association relationship between the candidate battery health state values and the candidate initial charging power thresholds.

[0060] Among them, the association relationship between the candidate battery health state values and the candidate initial charging power thresholds is preset in this embodiment. The candidate battery health state values are the set of all possible battery health state values corresponding to the power battery of the target vehicle, and the candidate initial charging power thresholds are the initial charging power thresholds set corresponding to different candidate battery health state values. For example, assuming that any candidate battery health state value is 85%, the corresponding candidate initial charging power threshold of 25% is set for this candidate battery health state value.

[0061] It can be understood that according to the battery health state value of the target vehicle, the candidate initial charging power threshold associated with the battery health state value of the target vehicle can be determined by using the association relationship between the candidate battery health state values and the candidate initial charging power thresholds as the target initial charging power threshold.

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

[0063] Among them, the temperature threshold refers to the temperature value when the battery temperature value will not affect the capacity of the power battery of the target vehicle, such as 25°C, etc. It can be understood that when the battery temperature value exceeds or is lower than the temperature threshold, it will have a negative impact on the capacity of the power battery of the target vehicle, and the greater the temperature difference between the battery temperature value and the temperature threshold, the greater the negative impact on the capacity of the power battery of the target vehicle. The temperature influence coefficient can be set and adjusted according to experience.

[0064] Exemplarily, assuming that the temperature threshold is 25°C, the battery temperature value is 10°C, and the temperature influence coefficient is 0.02, then the first charging power influence coefficient is 1 + 0.02 * (25 - 10) = 1.3.

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

[0066] S203. Determine a second charging power impact coefficient based on the magnitude relationship between the second discharge current value and the discharge current threshold, and determine a dynamic charging power threshold based on the intermediate charging power threshold and the second charging power impact coefficient.

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

[0068] Exemplarily, assume that the discharge current threshold is 1C, where C represents the discharge rate of the battery of the target vehicle. 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 battery capacity of the target vehicle. Then, determine the dynamic charging power threshold based on the sum of the intermediate charging power threshold and the second charging power impact coefficient. Assume that the intermediate charging power threshold is 32.5% and the second charging power impact coefficient is 5%. Then, the dynamic charging power threshold is 32.5% + 5% = 37.5%. That is, when the current remaining power of the target vehicle is less than 37.5%, it is determined that the target vehicle needs to be charged at the current moment.

[0069] By determining a target initial charging power threshold associated with the battery health state value from the candidate initial charging power thresholds according to the association relationship between the candidate battery health state value and the candidate initial charging power threshold; determining a first charging power impact coefficient based on the temperature difference between the battery temperature value and the temperature threshold, and the temperature impact coefficient, and determining an intermediate charging power threshold based on the target initial charging power threshold and the first charging power impact coefficient; determining a second charging power impact coefficient based on the magnitude relationship between the second discharge current value and the discharge current threshold, and determining a dynamic charging power threshold based on the intermediate charging power threshold and the second charging power impact coefficient, the beneficial effects are as follows:

[0070] First, adjusting the threshold according to the battery health state value can avoid overcharging of batteries with high battery health state values or undercharging of batteries with low battery health state values, extend the battery life, and reduce the aging rate.

[0071] Second, dynamically correcting the threshold through the battery temperature value can reduce the risk of thermal runaway caused by high-rate discharge and improve safety and reliability.

[0072] Third, adjusting the threshold in combination with the magnitude of the discharge current value can prevent voltage dips caused by excessive instantaneous power demand and improve safety and reliability.

[0073] Fourthly, through a dynamic adjustment mechanism that fuses multiple parameters, a balance is achieved among battery life, safety, and energy efficiency, which is especially applicable to scenarios where electric vehicles have strict requirements for battery management.

[0074] S204. Numerically compare the current remaining battery level and the dynamic threshold of the charging amount; when the current remaining battery level is less than the dynamic threshold of the charging amount, determine that the target vehicle needs to be charged at the current moment.

[0075] Exemplarily, assume that the dynamic threshold of the charging amount is 37.5%, and assume that the current remaining battery level is 40%, that is, the current remaining battery level is greater than the dynamic threshold of the charging amount, and determine that the target vehicle does not need to be charged at the current moment.

[0076] Exemplarily, assume that the dynamic threshold of the charging amount is 37.5%, and assume that the current remaining battery level is 35%, that is, the current remaining battery level is less than the dynamic threshold of the charging amount, and determine that the target vehicle needs to be charged at the current moment.

[0077] By numerically comparing the current remaining battery level and the dynamic threshold of the charging amount; when the current remaining battery level is less than the dynamic threshold of the charging amount, determining that the target vehicle needs to be charged at the current moment, the beneficial effects are as follows:

[0078] Firstly, when the current remaining battery level is lower than the dynamic threshold of the charging amount, charging in a timely manner can prevent the battery from entering a deep discharge state, which may cause problems such as an increase in battery internal resistance and accelerated capacity decay, and extend the battery life.

[0079] Secondly, by precisely controlling the charge and discharge depth, the decline of battery performance can be delayed, and the battery maintenance frequency can be reduced.

[0080] Thirdly, by precisely charging, the number of ineffective charge and discharge times can be reduced, the overall energy consumption can be lowered, and resource waste can be reduced.

[0081] S205. If it is determined that the target vehicle needs to be charged at the current moment, then determine the magnitude relationship between the first discharge current value and the load demand current value, and when the first discharge current value is greater than the load demand current value, determine the power battery charging current value according to the current difference between the first discharge current value and the load demand current value.

[0082] Exemplarily, assume 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, then determine the current difference between the first discharge current value and the load demand current value: 120A - 100A = 20A, which is used as the power battery charging current value that can charge the power battery of the target vehicle.

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

[0084] First, when the first discharge current value of the solar battery pack is greater than the load demand current value, by calculating the power battery charging current value through the difference, the excess energy can be directly stored, avoiding solar energy waste and maximizing the utilization rate of solar energy.

[0085] Second, dynamically matching the power battery charging current value can prevent the power battery of the target vehicle from overheating due to excessive charging current when the light is sufficient, or the load of the target vehicle from losing power due to insufficient discharge current when the light is insufficient.

[0086] Third, accurately calculating the power battery charging current value can avoid the overcharging risk caused by using a fixed value for charging.

[0087] Optionally, after determining the magnitude relationship between the first discharge current value and the load demand current value, it further includes:

[0088] When the first discharge current value is greater than the load demand current value, controlling the target solar battery pack to supply power to the load of the target vehicle according to the load demand current value.

[0089] Exemplarily, 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, then control the target solar battery pack to output 100A current to supply power to the load of the target vehicle.

[0090] By controlling the target solar battery pack to supply power to the load of the target vehicle according to the load demand current value when the first discharge current value is greater than the load demand current value, it is possible to both use solar energy to supplement the power battery of the target vehicle and use solar energy to supply power to the load of the target vehicle when the first discharge current value is greater than the load demand current value, improving the utilization efficiency of solar energy.

[0091] S206. Control the target solar battery pack to charge the power battery of the target vehicle according to the power battery charging current value.

[0092] Optionally, the method further includes:

[0093] A. Determine the magnitude relationship between the first discharge current value and the load demand current value.

[0094] B. When the first discharge current value is less than the load demand current value, determine the power battery discharge current value of the power battery of the target vehicle according to the current difference between the first discharge current value and the load demand current value.

[0095] In one implementation, when the first discharge current value is less than the load demand current value, determine the current difference between the first discharge current value and the load demand current value as the power battery discharge current value of the power battery of the target vehicle at the current moment.

[0096] For example, assume 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. Therefore, the load demand current value cannot be satisfied only according to the first discharge current value of the target solar battery pack, and the power battery of the target vehicle needs to provide output current at the same time to meet the load demand current value. The power battery discharge current value of the power battery of the target vehicle is 100A - 80A = 20A.

[0097] C. Control the target solar battery pack to supply power to the load of the target vehicle according to the first discharge current value, and control the power battery of the target vehicle to supply power to the load of the target vehicle according to the power battery discharge current value.

[0098] Exemplarily, assume that the first discharge current value is 80A, the load demand current value is 100A, and the power battery discharge current value is 20A. Then control the target solar battery pack to output 80A current to supply power to the load of the target vehicle, and control the power battery of the target vehicle to output 20A current to supply power to the load of the target vehicle, so that the total output current value of the target solar battery pack and the power battery of the target vehicle meets the load demand current value of 100A.

[0099] By determining the magnitude relationship between the first discharge current value and the load demand current value; when 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; controlling the target solar battery pack to supply power to the load of the target vehicle according to the first discharge current value, and controlling the power battery of the target vehicle to supply power to the load of the target vehicle according to the power battery discharge current value, the beneficial effects are as follows:

[0100] First, by preferentially using the first discharge current value of the solar battery, the renewable energy is utilized to the maximum extent, reducing the dependence on the power battery of the target vehicle.

[0101] Second, in the extreme case of continuous rainy and cloudy days, the load operation can still be maintained through the power battery discharge current value of the power battery of the target vehicle, avoiding the risk of paralysis of the traditional single power supply system, and achieving the effect of dual power supply guarantee.

[0102] Optionally, the method further includes:

[0103] Determine the magnitude relationship between the first discharge current value and the load demand current value; when the first discharge current value is greater than or equal to the load demand current value, control the target vehicle power battery to stop discharging.

[0104] In one embodiment, the magnitude relationship between the first discharge current value and the load demand current value is determined. When the first discharge current value is greater than or equal to the load demand current value, it means that the load demand current value can be met only by the first discharge current value of the target solar cell group, and there is no need for the target vehicle power battery to provide output current at the same time. Therefore, 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; when 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, the beneficial effects are:

[0106] First, when the first discharge current value of the target solar cell group exceeds the current value required by the vehicle load, the target vehicle power battery discharge is actively stopped at this time, which can avoid the destruction of the electrode structure of the lithium-ion battery due to excessive delithiation, thereby slowing down the capacity decay of the target vehicle power battery.

[0107] Secondly, if the target vehicle power battery continues to participate in power supply, it may be subjected to an instantaneous current exceeding its optimal discharge rate when the load suddenly changes, causing accelerated aging of the electrode material. The target solar cell array can reduce such risks as a buffer layer.

[0108] Optionally, the method further includes:

[0109] According to the whole vehicle voltage level of the target vehicle, the electric energy of the target solar cell group is processed by a step-up and step-down circuit to output high-voltage electric energy; and a first discharge current value of the target solar cell group is determined according to the high-voltage electric energy.

[0110] Among them, the vehicle voltage level refers to the voltage level classification standards applicable to different electrical equipment or circuits in the vehicle's electrical system, such as 400V level, 800V level, etc.

[0111] In one embodiment, the electric energy of the target solar cell group is input into a boost and current reducing circuit, and the electric energy of the target solar cell group is boosted and current reduced by the boost and current reducing circuit, and the output voltage value satisfies the high-voltage electric energy of the whole vehicle voltage level, and the first discharge current value that the target solar cell group can output is further determined based on the high-voltage electric energy after boost and current reduction.

[0112] By processing the electric energy of the target solar cell pack through a boost - buck circuit according to the vehicle voltage level of the target vehicle, and outputting high - voltage electric energy; determining the first discharge current value of the target solar cell pack based on the high - voltage electric energy, the beneficial effects are as follows:

[0113] In the first aspect, the target solar cell pack directly outputs high - voltage electric energy, seamlessly docking with the target vehicle's power battery or vehicle load, achieving the effect of matching the vehicle's high - voltage architecture.

[0114] In the second aspect, the boost - buck circuit boosts the voltage of the solar cell pack to the vehicle's high - voltage level. Boosting the voltage can reduce the current value, thereby reducing the Joule heat loss of the transmission line and improving the overall energy efficiency.

[0115] This embodiment also provides an actual implementation method of a charging method for a vehicle power battery in a target vehicle, including:

[0116] The battery management system determines whether the current remaining power is lower than the charging power dynamic threshold. If so, it sends a solar charging request to the vehicle control system of the target vehicle. After receiving the request, the vehicle control system sends a solar charging instruction to the solar charging controller. Among them, the solar charging controller has functions of signal transmission, boost - buck, and current - voltage stabilization.

[0117] The solar charging controller controls the internal circuit to be connected. The target solar cell pack transmits the electric energy converted from solar energy into the solar charging controller. The electric energy is converted into high - voltage electric energy at the vehicle voltage level after passing through the boost - buck circuit. The high - voltage electric energy flows out of the solar charging controller and enters the vehicle high - voltage distribution box after passing through the current - voltage stabilization circuit. At this time, the solar charging controller sends a signal containing information such as the voltage and current of the high - voltage electricity to the vehicle controller.

[0118] The vehicle controller transmits this signal to the battery management system. After receiving the signal, the battery management system compares the magnitude of the first discharge current value of the target solar cell pack with the load demand current value.

[0119] If the first discharge current value is less 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 vehicle operation to the vehicle controller. After receiving the signal, the vehicle controller sends a power distribution signal to the vehicle high - voltage distribution box. The vehicle high - voltage distribution box directly uses the first discharge current for vehicle load operation and sends a feedback signal to the vehicle controller. After receiving the signal, the vehicle controller transmits it to the battery management system. After receiving the signal, the battery management system adjusts the power battery discharge current of the target vehicle to decrease to the power battery discharge current value.

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

[0121] Embodiment 3

[0122] Figure 3 FIG. is a schematic structural diagram of a charging device for a vehicle power battery provided in Embodiment 3 of the present invention, which is applicable to the situation of using solar energy to supplement the energy of the vehicle power battery, such as Figure 3 as shown, the device includes:

[0123] A charging power dynamic threshold determination module 31, configured to determine a charging power dynamic threshold of the target vehicle at the current moment according to the power influencing factors of the power battery of the target vehicle when the target vehicle is in a starting state;

[0124] A charging demand identification module 32, configured to determine whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the charging power dynamic threshold;

[0125] A vehicle power battery charging module 33, configured to, if it is determined that the target vehicle needs to be charged at the current moment, determine a power battery charging current value according to the first discharge 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; wherein, the target solar battery pack is installed on the target vehicle.

[0126] Optionally, the power influencing factors include at least one of a battery health state value, a battery temperature value, and a second discharge current value;

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

[0128] Determine a target charging power initial threshold associated with the battery health state value from the candidate charging power initial thresholds according to the association relationship between the candidate battery health state value and the candidate charging power initial threshold;

[0129] Determine a first charging power influence coefficient based on the temperature difference between the battery temperature value and the temperature threshold, and the temperature influence coefficient, and determine an intermediate charging power threshold based on the initial target charging power threshold and the first charging power influence coefficient;

[0130] Determine a second charging power influence coefficient based on the magnitude relationship between the second discharge current value and the discharge current threshold, and determine the dynamic charging power threshold based on the intermediate charging power threshold and the second charging power influence coefficient.

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

[0132] Compare the current remaining power and the dynamic charging power threshold numerically;

[0133] When the current remaining power is less than the dynamic charging power threshold, determine that the target vehicle needs to be charged at the current moment.

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

[0135] Determine the magnitude relationship between the first discharge current value and the load demand current value;

[0136] When the first discharge current value is greater than the load demand current value, determine the power battery charging current value according to the current difference between the first discharge current value and the load demand current value.

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

[0138] When the first discharge current value is greater than the load demand current value, control the target solar battery pack to supply power to the load of the target vehicle according to the load demand current value.

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

[0140] Determine the magnitude relationship between the first discharge current value and the load demand current value;

[0141] When the first discharge current value is less than the load demand current value, determine the power battery discharge current value according to the current difference between the first discharge current value and the load demand current value;

[0142] Control the target solar cell pack to supply power to the load of the target vehicle according to the first discharge current value, and control the power battery of the target vehicle to supply power to the load of the target vehicle according to the power battery discharge current value.

[0143] Optionally, the device further includes a stop discharge trigger module, specifically configured to:

[0144] Determine the magnitude relationship between the first discharge current value and the load demand current value;

[0145] When the first discharge current value is greater than or equal to the load demand current value, control the power battery of the target vehicle to stop discharging.

[0146] Optionally, the device further includes a boost and current reduction module, specifically configured to:

[0147] According to the vehicle voltage level of the target vehicle, process the electrical energy of the target solar cell pack through a boost and current reduction circuit, and output high-voltage electrical energy;

[0148] Determine the first discharge current value of the target solar cell pack according to the high-voltage electrical energy.

[0149] The charging device for the vehicle power battery provided by the embodiments of the present invention can execute the charging method for the vehicle power battery provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

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

[0151] Embodiment 4

[0152] Figure 4 FIG. shows a schematic structural diagram of an electronic device 40 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, a personal digital processor, a cellular phone, a smart phone, a wearable device (such as a helmet, glasses, a watch, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

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

[0154] Multiple 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, speakers, etc.; a storage unit 48, such as a disk, an optical disc, 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 via a computer network such as the Internet and / or various telecommunication networks.

[0155] The processor 41 can be various general-purpose 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 dedicated 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 executes the 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 onto 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 executed. Alternatively, in other embodiments, the processor 41 can be configured to execute the charging method of the vehicle power battery in any other appropriate manner (e.g., by means of firmware).

[0157] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented 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 a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0158] The computer programs for implementing the methods of the present invention 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 programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0159] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0160] To provide interaction with a user, the systems and techniques described herein 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) through which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the 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 input, voice input, or tactile input).

[0161] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0162] A computing system can include a client and a server. The client and the server are generally far from each other and usually interact through a communication network. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0163] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0164] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for charging a vehicle power battery, characterized in that: The method comprises: When the target vehicle is in a starting state, determining a dynamic threshold of the charging power of the target vehicle at the current moment according to factors affecting the power of the target vehicle's power battery at the current moment; Determining whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the charging power dynamic threshold; 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 power battery of the target vehicle according to the power battery charging current value; wherein the target solar cell group is installed on the target vehicle.

2. The method according to claim 1, characterized in that The power influencing factor includes at least one of a battery health status value, a battery temperature value and a second discharge current value; The determining, based on the influencing factors of the power battery of the target vehicle at the current moment, the dynamic threshold of the charging power of the target vehicle at the current moment includes: According to the association relationship between the candidate battery health state value and the candidate charging power initial threshold value, determining the target charging power initial threshold value associated with the battery health state value from the candidate charging power initial threshold value; Determine a first charging power influence coefficient according to a temperature difference between the battery temperature value and the temperature threshold, and a temperature influence coefficient, and determine a charging power intermediate threshold according to the target charging power initial threshold and the first charging power influence coefficient; The second charging power influence coefficient is determined according to the magnitude relationship between the second discharge current value and the discharge current threshold, and the charging power dynamic threshold is determined according to the charging power intermediate threshold and the second charging power influence coefficient.

3. The method according to claim 1, characterized in that The determining whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the charging power dynamic threshold comprises: Comparing the current remaining power and the charging power dynamic threshold with a numerical value; When 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 moment.

4. The method according to claim 1, characterized in that: The step of 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 includes: Determining a magnitude relationship between the first discharge current value and the load demand current value; In a case where the first discharge current value is greater than the load demand current value, the power battery charging current value is determined according to a current difference between the first discharge current value and the load demand current value.

5. The method according to claim 4, after determining the magnitude relationship between the first discharge current value and the load demand current value, further comprising: When 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.

6. The method according to claim 1, further comprising: Determining a magnitude relationship between the first discharge current value and the load demand current value; When 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; 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 power battery of the target vehicle is controlled to supply power to the load of the target vehicle according to the power battery discharge current value.

7. The method according to claim 1, further comprising: Determining a magnitude relationship between the first discharge current value and the load demand current value; When 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.

8. The method according to claim 1, before 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, further comprising: According to the whole vehicle voltage level of the target vehicle, the electric energy of the target solar cell group is processed by a voltage step-up and current reduction circuit to output high-voltage electric energy; A first discharge current value of the target solar cell group is determined according to the high voltage electric energy.

9. A charging device for a vehicle power battery, characterized in that: The device comprises: A charging power dynamic threshold determination module is used to determine the charging power dynamic threshold of the target vehicle at the current moment according to the power influencing factors of the target vehicle's power battery at the current moment when the target vehicle is in the starting state; A charging demand identification module, used to determine whether the target vehicle needs to be charged at the current moment according to the current remaining power of the target vehicle and the charging power dynamic threshold; A vehicle power battery charging module is used to determine 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 if it is determined that the target vehicle needs to be charged at the current moment, and to control the target solar cell group to charge the power battery of the target vehicle according to the power battery charging current value; wherein the target solar cell group is installed on the target vehicle.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, 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 so that the at least one processor can execute the vehicle power battery charging method described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to execute the vehicle power battery charging method according to any one of claims 1 to 8.

12. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method for charging a vehicle power battery according to any one of claims 1 to 8.

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