Range extender control method and device and range extender controller

Abstract

This application relates to a range extender control method, apparatus, and controller, belonging to the field of vehicle control technology. One embodiment of the method includes: acquiring the number of fast-charging and slow-charging cycles of a target vehicle within a current time period, and the starting state of charge (SBC) of the range extender associated with the target vehicle; if the number of fast-charging cycles is less than a first fast-charging cycle threshold, updating the starting SBC based on the slow-charging cycle interval and using a first SBC adjustment method corresponding to that interval, to obtain the updated starting SBC. The first SBC adjustment method includes maintaining the current state and adjusting downwards. This embodiment improves the control accuracy of the vehicle's range extender.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a range extender control method, a range extender control device, a range extender controller, a computer-readable storage medium, and a computer program product. Background Technology

[0002] With the development of electric vehicle technology, range extenders have emerged to meet the demand for extended driving range. Range extenders use an internal combustion engine to generate electricity to power electric vehicles, including replenishing the battery, thus extending the driving range. Electric vehicles equipped with range extenders are also called range-extended electric vehicles (REEVs). When the battery is low, the range extender uses other energy sources (such as gasoline) to replenish the electrical energy. REEVs can operate in both pure electric and range-extended modes. When the battery is fully charged, REEVs can preferentially operate in pure electric mode, relying on electric power. When the battery's state of charge (SOC) drops to a certain threshold (also known as the range extender's starting SOC), the REEV switches to range-extended mode, where the internal combustion engine starts and acts as a generator, supplying the electric motor with the electricity to drive the vehicle.

[0003] In related technologies, when setting the starting charge state of a range extender, a corresponding starting charge state is usually set for each operating mode of the vehicle. However, the pre-set starting charge state cannot be fully applied to the actual situation of the vehicle, such as the charging status of the vehicle, so there is a need to improve the control method of the range extender. Summary of the Invention

[0004] Therefore, it is necessary to provide a range extender control method, range extender control device, range extender controller, computer-readable storage medium, and computer program product that can improve the control accuracy of the range extender in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a range extender control method. The method includes:

[0006] Obtain the number of fast charging and slow charging times of the target vehicle within the current time period, as well as the start-up charge status of the range extender associated with the target vehicle;

[0007] When the number of fast charging cycles is less than the first fast charging cycle threshold, the starting state of charge is updated based on the slow charging cycle range in which the slow charging cycle falls, using the first state of charge adjustment method corresponding to the slow charging cycle range, to obtain the updated starting state of charge. The first state of charge adjustment method includes maintaining the current state of charge and adjusting downwards.

[0008] In some embodiments, the method further includes:

[0009] Receives a charging pile connection signal and determines the charging type based on the charging pile connection signal. The charging type includes fast charging and slow charging.

[0010] If the charging type is determined to be slow charging, record the charging station connection time;

[0011] Upon receiving a signal indicating that the charging station has disconnected, record the time the charging station disconnects.

[0012] Based on the charging time, as well as the time interval between the charging station connection time and the charging station disconnection time, it is determined whether to increase the number of slow charging cycles.

[0013] In some embodiments, based on the charging duration and the time interval between the charging pile connection time and the charging pile disconnection time, it is determined whether to increase the number of slow charging cycles, including:

[0014] If the time interval between the charging pile connection time and the charging pile disconnection time is within a preset time interval, and the charging time is greater than or equal to the preset slow charging time corresponding to the preset time interval, the slow charging count will be incremented by 1.

[0015] Among them, the interval length of the preset time period is longer than the preset slow charging time.

[0016] In some embodiments, the preset time period is determined based on the range of low electricity prices.

[0017] In some embodiments, the preset time period intervals include multiple preset time period intervals, and the preset slow charging durations corresponding to each preset time period interval may be the same or different.

[0018] In some embodiments, the preset time period interval includes a first preset time period interval and a second preset time period interval, wherein the second preset time period interval is a subset of the first preset time period interval;

[0019] If the time interval between the charging pile connection time and the charging pile disconnection time is within the first preset time interval, and the charging time is greater than or equal to the first preset slow charging time, the slow charging count will be incremented by 1.

[0020] If the time interval between the charging pile connection time and the charging pile disconnection time is within the second preset time interval, and the charging time is greater than or equal to the second preset slow charging time, the number of slow charging times will be incremented by 1.

[0021] Wherein, the first interval of the first preset time period is longer than the first preset slow charging time, and the second interval of the second preset time period is longer than the second preset slow charging time.

[0022] In some embodiments, when the determined charging type is slow charging, the charging station connection time is recorded, including:

[0023] If the charging type is determined to be slow charging, and the charging time is greater than or equal to the first preset time, the charging station connection time is recorded.

[0024] In some embodiments, the method further includes:

[0025] If the charging type is determined to be fast charging, and the charging time is greater than or equal to the second preset time, the fast charging count will be incremented by 1.

[0026] In some embodiments, the slow charging cycle intervals include at least two, and each slow charging cycle interval corresponds to a reduction ratio. The larger the endpoint value of the slow charging cycle interval, the larger the reduction ratio corresponding to the slow charging cycle interval.

[0027] Based on the slow charging cycle range in which the slow charging cycle falls, the starting state of charge is updated using the first state of charge adjustment method corresponding to the slow charging cycle range, resulting in the updated starting state of charge, including:

[0028] The lowering ratio corresponding to the slow charging cycle range is adjusted to obtain the updated startup charge state.

[0029] In some embodiments, the method further includes:

[0030] When the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, the starting state of charge is updated by adopting a second state of charge adjustment method corresponding to the fast charging cycle interval based on the fast charging cycle interval, and the updated starting state of charge is obtained. The second state of charge adjustment method includes keeping it unchanged and adjusting it upward.

[0031] In some of these embodiments:

[0032] The fast charging cycle interval includes at least two, and each fast charging cycle interval corresponds to an upward adjustment ratio or a target value of state of charge. The larger the endpoint value of the fast charging cycle interval, the larger the upward adjustment ratio or target value of the corresponding fast charging cycle interval.

[0033] Based on the fast charging cycle range, a second state of charge adjustment method corresponding to the fast charging cycle range is adopted to update the startup state of charge, obtaining the updated startup state of charge, including:

[0034] Adjust the startup charge state by the corresponding increase ratio for the fast charging cycle range to obtain the updated startup charge state.

[0035] or

[0036] The target value of the state of charge corresponding to the fast charging cycle interval is used as the updated startup state of charge.

[0037] In some embodiments, the method further includes:

[0038] If the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, and the number of slow charging cycles is greater than or equal to the target slow charging cycle threshold, the starting charge state remains unchanged.

[0039] In some embodiments, the method further includes:

[0040] If the number of fast charging cycles is greater than or equal to the target fast charging cycle threshold, the starting charge state will be set to the preset charge state.

[0041] Secondly, this application also provides a range extender control device. The device includes:

[0042] The data acquisition module is used to record the number of fast charging and slow charging times of the target vehicle within the current time period, as well as the start-up charge status of the range extender associated with the target vehicle.

[0043] The adjustment module is used to update the startup charge state based on the slow charging number range where the fast charging number is less than the first fast charging number threshold, using the first state of charge adjustment method corresponding to the slow charging number range, to obtain the updated startup charge state. The first state of charge adjustment method includes keeping it unchanged and adjusting it downward.

[0044] Thirdly, this application also provides a range extender controller. The range extender controller includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the range extender control method as described in any of the above embodiments.

[0045] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the range extender control method as described in any of the above embodiments.

[0046] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of the range extender control method as described in any of the above embodiments.

[0047] The aforementioned range extender control method, range extender control device, range extender controller, computer-readable storage medium, and computer program product, by statistically analyzing the number of fast charging and slow charging cycles of the target vehicle within the current time period, determine the corresponding state of charge adjustment method based on the slow charging cycle range when the number of fast charging cycles is less than a first fast charging cycle threshold. This updates the starting state of charge to obtain the updated starting state of charge. The adjustment method is either to maintain the status quo or to adjust downwards. Since the number of fast charging cycles is less than the first fast charging cycle threshold, it indicates that during the current time period, the target vehicle was primarily charged using slow charging, meaning that fast charging was not used to replenish the battery, or even if fast charging was used, it was only done a very small number of times. Slow charging is sufficient to meet the battery replenishment needs of the target vehicle. Because the current is lower during slow charging, the internal chemical reaction of the battery is relatively mild and stable. During the process, the structural changes of the electrode material are relatively small, reducing the polarization phenomenon inside the battery and effectively slowing down the rate of battery capacity decay. When slow charging is used more often, it indicates that the target vehicle's battery is in normal condition or the battery aging rate is relatively slow. Therefore, the starting state of charge can be adjusted by maintaining it or adjusting it downward. The adjusted starting state of charge can be used as the starting state of charge for the next time period. When determining the starting state of charge for the next time period, it is adjusted in combination with the number of fast charging and slow charging cycles of the current vehicle. Both the number of fast charging and slow charging cycles are related to the vehicle's charging and replenishment methods. The charging and replenishment methods and cycles of the vehicle are related to both the vehicle's usage habits and the charging habits of the vehicle's users. Thus, the starting state of charge of the range extender is adjusted based on the actual driving process of the vehicle and the user's charging habits. The adjusted starting state of charge is used to control the start of the range extender, improving the control accuracy of the vehicle's range extender. Attached Figure Description

[0048] Figure 1 This is a flowchart illustrating a range extender control method in one embodiment;

[0049] Figure 2 A flowchart illustrating another embodiment of the range extender control method;

[0050] Figure 3 This is a flowchart illustrating another embodiment of the range extender control method;

[0051] Figure 4 This is a flowchart illustrating a range extender control method according to another embodiment;

[0052] Figure 5 A flowchart illustrating another embodiment of the range extender control method;

[0053] Figure 6 This is a flowchart illustrating a specific example of a range extender control method.

[0054] Figure 7 Here is a flowchart illustrating the range extender control method in another specific example;

[0055] Figure 8 This is a structural block diagram of a range extender control device in one embodiment. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0057] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0059] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0060] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0063] It should be noted that the information (including but not limited to fast charging cycles, slow charging cycles, charging pile connection time, charging pile disconnection time, charging duration, and initial state of charge, etc.) and data (including but not limited to data used for analysis, stored data, and displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the acquisition, transmission, storage, use, and processing of the relevant data comply with the relevant provisions of applicable laws and regulations. In the embodiments of this application, certain software, components, models, and other existing industry solutions may be mentioned. These should be considered exemplary, and their purpose is merely to illustrate the feasibility of implementing the technical solution of this application, but does not mean that the applicant has already used or necessarily used such solutions.

[0064] Electric vehicles equipped with range extenders convert fuel into electricity to directly power the vehicle or charge the battery. Therefore, the timing of the range extender's activation significantly impacts the driving experience. The starting state of charge (SOC) setting, as a parameter indicating when the range extender activates, directly influences the driving experience. In related technologies, the starting SOC of the range extender is pre-set based on experience or relevant test results. However, in actual vehicle use, even for the same type of vehicle with the same starting SOC, the driving experience resulting from range extender activation can vary.

[0065] Research has revealed that different vehicles experience varying driving conditions, and different drivers have different charging habits, all of which affect the vehicle's initial State of Charge (SOC). The study found that different driving processes and charging habits are typically reflected in whether the vehicle is charged using fast or slow charging, leading to differences in the number of fast and slow charge cycles over a given period. Therefore, by combining these fast and slow charge cycles, the starting SOC of the vehicle's range extender can be adjusted to improve the accuracy of range extender control and consequently enhance the driving experience.

[0066] Accordingly, this application provides a range extender control method, which can be applied to electric vehicles equipped with range extenders. The range extender control method can be executed by the electric vehicle's controller, which can be a range extender controller, a vehicle control unit (VCU), or a combination of both, or by other controllers within the electric vehicle or by controllers working together.

[0067] In one embodiment, such as Figure 1 As shown, a range extender control method is provided, including the following steps:

[0068] Step S102: Obtain the number of fast charging and slow charging times of the target vehicle within the current time period, as well as the start-up charge status of the range extender associated with the target vehicle.

[0069] The target vehicle refers to an electric vehicle equipped with a range extender, and there are no restrictions on the specific type of electric vehicle.

[0070] A time period refers to a time interval divided by time. The length of a time period is unlimited; for example, a time period may be 15 days, 20 days, or 30 days, or a time period may be monthly. In some examples, each time period may have a corresponding start and end time. In other examples, a timer may be set, with the timer's duration being the duration of the time period. When the timer's duration ends, the current time period terminates, the timer's timing is initialized, and the next time period begins.

[0071] In order to improve the accuracy of time cycle recording, avoid inaccurate time cycle timing due to timer failure, and reduce the energy consumption of the target vehicle's battery due to timer timing, in the relevant embodiments of this application, each time cycle may have a corresponding start time point and end time point, for example, each time cycle is 30 days.

[0072] The current time period refers to the time period in which the current point in time is located, that is, the time period in which the method of the embodiments of this application is executed at the current point in time. In specific examples related to this application, the range extender control method of the embodiments of this application may be triggered when the end time of a certain time period is reached.

[0073] The starting state of charge (SOC) of the range extender associated with the target vehicle is a threshold used to determine whether to activate the range extender within the current time period; that is, the starting SOC for the current time period. It can be used to determine whether to activate the range extender within the current time period, or it can be the initial threshold for determining the starting SOC for the current time period. In the relevant example, if the target vehicle's battery SOC is lower than this starting SOC within the current time period, the range extender of the target vehicle can be activated.

[0074] The number of fast charging cycles within the current time period refers to the number of times the target vehicle's battery is charged via fast charging within the current time period. The number of slow charging cycles within the current time period refers to the number of times the target vehicle's battery is charged via slow charging within the current time period.

[0075] Fast charging, or rapid charging, bypasses the onboard charger and directly inputs DC power into the battery by connecting to a high-voltage, high-current DC power source. This allows the battery to be charged with a large amount of power in a short time. Fast charging has high charging power and can quickly replenish the battery.

[0076] Slow charging, also known as slow charging, involves converting AC power to DC power via an onboard charger and then slowly charging the battery. The charging power at full charge is relatively low, and the charging time is also longer.

[0077] Within the current time period, the cumulative number of times the target vehicle is charged via fast charging and the cumulative number of times it is charged via slow charging.

[0078] Step S104: When the number of fast charging cycles is less than the first fast charging cycle threshold, based on the slow charging cycle range in which the slow charging cycle is located, the starting charge state is updated using the first state of charge adjustment method corresponding to the slow charging cycle range to obtain the updated starting charge state. The first state of charge adjustment method includes maintaining the status quo and adjusting downward.

[0079] The slow charging cycle range refers to the range of slow charging cycles. Each slow charging cycle range can be set with a corresponding first state of charge adjustment method. The first state of charge adjustment method refers to the method of adjusting the starting state of charge of the current time period based on the slow charging cycle range. Different slow charging cycle ranges can correspond to different first state of charge adjustment methods.

[0080] Different first state of charge adjustment methods can refer to different adjustment directions, such as maintaining the current state and adjusting downwards. In some examples, different first state of charge adjustment methods can also include different adjustment magnitudes. For example, the first state of charge adjustment methods corresponding to two slow charging cycle intervals are both downward adjustments, but the magnitude or specific adjustment value of the downward adjustment in the two first state of charge adjustment methods are different, but not limited to this.

[0081] "Maintaining unchanged" means keeping the starting charge state unchanged, that is, not adjusting the starting charge state of the current time period, and directly using the starting charge state of the current time period as the starting charge state of the next time period.

[0082] Downward adjustment refers to reducing the starting state of charge for the current time period. For example, if the starting state of charge for the current time period is 30%, the starting state of charge after downward adjustment will be less than 30%, such as 25% or 20%.

[0083] The actual number of slow charging cycles can fall within different slow charging cycle ranges. Therefore, the starting charge state can be adjusted using the first state of charge adjustment method corresponding to the slow charging cycle range to obtain the updated starting charge state.

[0084] In practical applications, the updated starting state of charge (SBC) can be used as the starting SBC for the range extender in the next time period. In the next time period, if the target vehicle's SBC is lower than the updated starting SBC, the range extender of the target vehicle will be activated.

[0085] When the time enters the next time cycle, the state of charge of the target vehicle's battery can be obtained in real time and compared with the updated starting state of charge of the target vehicle. When the real-time state of charge is less than the updated second starting state of charge, the range extender of the target vehicle can be controlled to start.

[0086] The method of controlling the start-up of the target vehicle's range extender is not limited. For example, the range extender controller generates a corresponding control command / signal to control the target vehicle's range extender to be in the starting state. Another example is that the target vehicle's domain controller or vehicle control unit (VCU) generates a control command / signal and sends it to the range extender controller to control the target vehicle's range extender to be in the starting state. In other embodiments, the target vehicle's range extender can also be controlled to start in other ways, which are not specifically shown in this application.

[0087] The aforementioned range extender control method statistically analyzes the number of fast and slow charging cycles for the target vehicle within the current time period. When the number of fast charging cycles is less than a first fast charging threshold, the method determines the corresponding state of charge (SOC) adjustment mode based on the range of slow charging cycles. This updates the starting SOC to obtain the updated starting SOC. The adjustment mode can be either to maintain the current state or to adjust downwards. Since the number of fast charging cycles is less than the first fast charging threshold, it indicates that during the current time period, the target vehicle was primarily charged using slow charging, meaning that fast charging was not used to replenish the battery, or even if it was, it was only done a very small number of times. Slow charging is sufficient to meet the battery's charging needs. Because the current is lower during slow charging, the internal chemical reactions of the battery are relatively mild and stable. During this slow charging process, the structural changes of the electrode materials are relatively minimal. The smaller size reduces internal polarization within the battery, effectively slowing down battery capacity degradation. When slow charging is the primary method, it indicates the target vehicle's battery is in normal condition or aging slowly. Therefore, the starting state of charge (SOC) can be adjusted by maintaining it or lowering it. The adjusted SOC serves as the starting SOC for the next time period. This means that determining the SOC for the next period is based on the current number of fast and slow charging cycles, both of which are related to the vehicle's charging methods. These methods and cycles are influenced by both vehicle usage habits and the user's charging habits. Thus, by considering both actual driving conditions and user charging habits, the range extender's SOC is adjusted, and the adjusted SOC controls the range extender's startup, improving control accuracy.

[0088] The method for recording and determining the number of fast charging cycles and full charging cycles is not limited. In some embodiments, reference is made to... Figure 2 As shown, the method also includes:

[0089] Step S202: Receive the charging pile connection signal, and determine the charging type based on the charging pile connection signal. The charging type includes fast charging and slow charging.

[0090] A charging pile connection signal is a signal generated or received when a vehicle establishes a communication connection with a charging pile. A charging pile is a dedicated device that provides electrical energy replenishment for electric vehicles (including pure electric vehicles and plug-in hybrid vehicles), functioning similarly to a gas station for traditional gasoline vehicles. The method of determining the charging type based on the charging pile connection signal is not limited. In some examples, the protocol in the charging pile connection signal may contain information indicating the charging type, which can be extracted to determine the charging type. In other examples, after receiving the charging pile connection signal, the charging type (fast charging or slow charging) can be determined based on a real-time determined charging strategy for the target vehicle. The charging strategy typically includes both fast and slow charging. In still other examples, some vehicles establish connections with the charging pile through different interfaces during fast charging and slow charging, allowing the charging type to be determined based on the type of interface connecting the target vehicle to the charging pile. It is understood that in other embodiments, the charging type (fast charging or slow charging) can also be determined in other ways, and this application does not impose specific limitations on this.

[0091] Step S204: If the charging type is determined to be slow charging, record the charging station connection time.

[0092] When the charging type is determined to be slow charging, record the charging station connection time. This recorded connection time can be either the time the charging station connection signal is received or the time when the charging type is determined to be slow charging. Since determining the charging type is completed in a short time, typically within a few seconds or even one second, and the charging type is indicated in the charging station connection signal protocol, the charging type can be determined upon receiving the connection signal. This is much shorter than the relatively long charging time of slow charging. Therefore, the time of receiving the charging station connection signal and the time of determining the charging type to be slow charging can both be used as the recorded charging station connection time, but are not limited to these.

[0093] In some examples, the charging station connection time can be recorded directly when the charging type is determined to be slow charging. In other examples, the charging station connection time can be recorded only when the charging time is greater than or equal to a first preset time, provided that the charging type is slow charging. That is, the first preset time is not recorded until the charging time is greater than or equal to the first preset time, thus reducing resource consumption caused by recording the charging station connection time when the charging process ends after a short full charge.

[0094] In cases where the charging pile connection time is recorded only when the charging duration is greater than or equal to the first preset duration, some examples may involve subtracting the first preset duration from the moment the first preset duration is reached to obtain the charging pile connection time, or using the moment the charging duration timing begins as the charging pile connection time, but these are not limited to these examples.

[0095] The specific value of the first preset duration can be limited differently based on actual technical needs. For example, the first preset duration in some examples may include 15 minutes, but it is not limited to this.

[0096] Step S206: Upon receiving a charging pile disconnection signal, record the charging pile disconnection time.

[0097] A charging station disconnection signal is a signal generated or received when the vehicle loses its communication connection with the charging station. This signal can be generated when charging is complete and the vehicle needs to disconnect from the charging station, such as a signal from the vehicle requesting to disconnect, or a signal from the charging station requesting to disconnect. In other examples, the charging station disconnection signal can also be a trigger signal generated when the vehicle and charging station have already disconnected, such as a signal detected when the vehicle and charging station have been disconnected. In other embodiments, the charging station disconnection signal can also be other types of signals, as long as they are related to the disconnection of the vehicle and charging station.

[0098] The recorded charging station disconnection time can be either the time when the signal requesting disconnection is received or the time when it is determined that the vehicle and the charging station have disconnected. Since receiving or generating the signal requesting disconnection and disconnecting the vehicle and the charging station usually take a short time, much shorter than the charging time of slow charging which is relatively long, the time when the signal requesting disconnection is received or the time when it is determined that the vehicle and the charging station have disconnected can both be used as the recorded charging station disconnection time, but are not limited to these.

[0099] Step S208: Based on the charging time and the time interval between the charging pile connection time and the charging pile disconnection time, determine whether to increase the number of slow charging cycles.

[0100] Charging time is the duration of a single charging process. In some embodiments, the charging time can be obtained by subtracting the charging pile connection time from the charging pile disconnection time. In other examples, the charging time is usually counted and displayed during vehicle charging; therefore, this counted charging time can also be obtained directly.

[0101] Based on the charging pile connection time and the charging pile disconnection time, the time interval of this charging process can be determined. The starting point of this time interval is the charging pile connection time, and the ending point of this time interval is the charging pile disconnection time.

[0102] Based on the charging time, the duration of the charging process can be determined. This allows us to determine whether the vehicle completed the charging process by connecting to the charging station or inserting the charging gun and then unplugging it shortly afterward, or whether it underwent an actual charging process for a certain duration after connecting to the charging station or inserting the charging gun.

[0103] Based on the time interval of this charging process, it can be determined in which time period the target vehicle's battery was slow-charged. Different slow-charging time periods are usually related to the type of charging station connected. For example, if the user has a home charging station, the vehicle is usually slow-charged at night. Therefore, based on the charging duration and time interval, the slow-charging situation and the type of charging station can be analyzed, and thus it can be determined whether it is necessary to count the number of slow-charging times.

[0104] The method for determining whether to increase the number of slow charging cycles based on the charging time and the time interval between the charging pile connection time and the charging pile disconnection time is not limited. In some embodiments, reference is made to... Figure 3 As shown, step S208, which determines whether to increase the number of slow charging cycles based on the charging duration and the time interval between the charging pile connection time and the charging pile disconnection time, may include:

[0105] Step S2081: If the time interval between the charging pile connection time and the charging pile disconnection time is within a preset time interval, and the charging time is greater than or equal to the preset slow charging time corresponding to the preset time interval, increment the slow charging count by 1.

[0106] Among them, the interval length of the preset time period is longer than the preset slow charging time.

[0107] A preset time period is used to determine the time interval within which the number of slow charging cycles can be recorded. In relevant embodiments of this application, the preset time period can be determined based on the range of low electricity prices.

[0108] Electricity price off-peak periods refer to times when electricity demand in the power system is low and electricity prices are relatively cheap. During these times, electricity prices are significantly reduced to encourage users to shift their electricity demand and balance the grid load. Since slow charging usually takes a long time, slow charging during electricity price off-peak periods can meet the demand for slow charging while significantly reducing charging costs. In cases where home charging stations are installed, slow charging is usually carried out during electricity price off-peak periods. Therefore, a preset time period can be determined based on the electricity price off-peak period.

[0109] The range of off-peak electricity prices may vary in different regions or seasons. Therefore, when determining the preset time period based on the range of off-peak electricity prices, the preset time period may also differ in different regions and seasons.

[0110] The method for determining the preset time period interval based on the off-peak electricity price period is not limited. In some embodiments, the entire off-peak electricity price period can be used as the preset time period interval, or a portion of the off-peak electricity price period can be used. In other embodiments, the preset time period interval can be determined based on the time range after floating left and / or right from the off-peak electricity price period. The start time of the time range after floating left is earlier than the start time of the off-peak electricity price period, and the end time of the time range after floating right is later than the end time of the off-peak electricity price period, to meet the user's need to charge during off-peak electricity prices while also having time for rest. It is understood that other methods can also be used in other embodiments to determine the preset time period interval based on the off-peak electricity price period, and this is not limited to these methods.

[0111] The preset slow charging duration refers to the estimated time required for a single slow charging cycle within a preset time period. The specific duration can be determined based on the interval between intervals within the preset time period, as long as the ratio of the preset slow charging duration to the interval interval is greater than or equal to a preset time ratio. Multiple preset time periods can be included to accommodate and meet the slow charging needs of different user types.

[0112] In some embodiments, when there are multiple preset time intervals, the preset slow charging durations corresponding to each preset time interval may be the same or different.

[0113] Taking two preset time intervals as an example, the preset time intervals can include a first preset time interval and a second preset time interval, and the preset slow charging duration can include a first preset slow charging duration and a second preset slow charging duration.

[0114] If the time interval between the charging pile connection time and the charging pile disconnection time is within the first preset time interval, and the charging time is greater than or equal to the first preset slow charging time, the slow charging count will be incremented by 1.

[0115] If the time interval between the charging pile connection time and the charging pile disconnection time is within the second preset time interval, and the charging time is greater than or equal to the second preset slow charging time, the number of slow charging times will be incremented by 1.

[0116] Wherein, the first interval of the first preset time period is longer than the first preset slow charging time, and the second interval of the second preset time period is longer than the second preset slow charging time.

[0117] The extent to which the interval length of the preset time period exceeds the preset slow charging time is not limited. In some examples, the preset slow charging time can be set to the same or different preset time periods. In other examples, the ratio of the preset slow charging time of a preset time period to the interval length of that preset time period is greater than or equal to a preset time ratio. When there are multiple preset time periods, the preset time ratio of each preset time period can be the same or different.

[0118] When there are multiple preset time intervals, the relationship between the preset time intervals is not limited. In some examples, some or all preset time intervals do not intersect or are mutually exclusive, that is, there is no intersection between the preset time intervals. In some examples, some preset time intervals intersect, that is, some preset time intervals have an intersection. In some examples, at least one preset time interval is a subset of another preset time interval, but it is not limited to these.

[0119] For example, in some specific examples, the preset time period includes two intervals. The first preset time period can be from 22:00 on the current day to 6:00 on the next day, with a first interval length of 4 hours and a first preset time ratio of 50%. The second preset time period can be from 00:00 on the current day to 4:00 on the next day, with a first interval length of 2 hours and a second preset time ratio of 50%. In this case:

[0120] If the charging station connection time and the charging station disconnection time are between 22:00 on the same day and 6:00 the next morning, that is, charging at night, and the charging duration (i.e., the interval between the charging station disconnection time and the charging station connection time) is greater than 4 hours, then the number of slow charging times will be increased by 1.

[0121] If the charging station connection time and the charging station disconnection time are between 00:00 on the same day and 04:00 on the next day, that is, charging at night, and the charging time is more than 2 hours, then the number of slow charging times will be increased by 1.

[0122] In other embodiments, reference is made to... Figure 4 As shown, the method also includes:

[0123] Step S210: If the charging type is determined to be fast charging, and the charging time is greater than or equal to the second preset time, increment the fast charging count by 1.

[0124] The specific value of the second preset duration can be limited according to actual technical needs. It can be the same as or different from the first preset duration. For example, in some examples, the second preset duration can be set to be the same as the first preset duration, such as 15 minutes, but it is not limited to this.

[0125] In some embodiments, the slow charging cycle intervals may include at least two, and each slow charging cycle interval corresponds to a reduction ratio. The larger the endpoint value of the slow charging cycle interval, the larger the reduction ratio corresponding to the slow charging cycle interval.

[0126] At this point, based on the slow charging cycle range, the first state of charge adjustment method corresponding to the slow charging cycle range is used to update the startup state of charge, obtaining the updated startup state of charge, including:

[0127] The lowering ratio corresponding to the slow charging cycle range is adjusted to obtain the updated startup charge state.

[0128] Accordingly, by setting multiple different slow charging cycle ranges, each corresponding to a different reduction ratio, the reduction ratio for adjusting the starting state of charge increases with the number of slow charging cycles. Since more slow charging cycles indicate more frequent slow charging, and more charging cycles have a greater impact on battery durability and lifespan, especially when using home charging stations for slow charging, users are more likely to use them frequently due to their convenience. Therefore, by setting a larger reduction ratio when the number of slow charging cycles is high, the maintenance value of the starting state of charge can be reduced, allowing the battery to power the vehicle as much as possible, increasing the pure electric range, minimizing the number of battery charging cycles, and thus reducing the battery charging frequency, which helps maintain and improve battery durability and lifespan.

[0129] The specific settings for the slow charging cycle intervals and the corresponding reduction ratios can be configured according to actual technical needs. In some specific examples of this application, three slow charging cycle intervals can be set. In this case, the slow charging cycle intervals include a first slow charging cycle interval, a second slow charging cycle interval, and a third slow charging cycle interval.

[0130] The upper limit of the first slow charging cycle interval is less than or equal to the first slow charging cycle threshold, and the downward adjustment ratio corresponding to the first slow charging cycle interval can be 0.

[0131] The second slow charging frequency range is greater than the first slow charging frequency threshold, but less than or equal to the second slow charging frequency threshold. The reduction ratio corresponding to the second slow charging frequency range is the first reduction ratio.

[0132] The third slow charging cycle interval is greater than the second slow charging cycle threshold. The reduction ratio corresponding to the third slow charging cycle interval is the second reduction ratio, and the absolute value of the second reduction ratio is greater than the absolute value of the first reduction ratio.

[0133] The specific values ​​of the first slow charging cycle threshold, the second slow charging cycle threshold, the first reduction ratio, and the second reduction ratio can be set according to specific technical needs. In the specific example of this application, the first slow charging cycle threshold, the second slow charging cycle threshold, the first reduction ratio, and the second reduction ratio can be 4 times, 10 times, 5%, and 10%, respectively. It is understood that other different settings can also be made in other embodiments.

[0134] refer to Figure 5 As shown, in the relevant embodiments, the range extender control method further includes:

[0135] Step S106: If the number of fast charging cycles exceeds the first fast charging cycle threshold, based on the fast charging cycle range in which the fast charging cycle falls, the second state of charge adjustment method corresponding to the fast charging cycle range is adopted to update the startup state of charge and obtain the updated startup state of charge. The second state of charge adjustment method includes maintaining the current state of charge and adjusting upwards.

[0136] The fast charging cycle range refers to the range of fast charging cycles. Each fast charging cycle range can be set with a corresponding second state of charge adjustment method. The second state of charge adjustment method refers to the way to adjust the starting state of charge in the current time period. Different fast charging cycle ranges can correspond to different state of charge adjustment methods.

[0137] Different second state of charge adjustment methods can refer to different adjustment directions, such as maintaining the same state or adjusting upwards. In some examples, different second state of charge adjustment methods can also include different adjustment magnitudes. For example, the second state of charge adjustment methods corresponding to the two fast charging cycle intervals are both upward adjustments, but the magnitude or specific adjustment value of the upward adjustment in these two second state of charge adjustment methods are different, but not limited to this.

[0138] "Maintaining unchanged" means keeping the starting charge state unchanged, that is, not adjusting the starting charge state of the current time period, and directly using the starting charge state of the current time period as the starting charge state of the next time period.

[0139] Upward adjustment refers to reducing the starting state of charge (SBC) for the current time period. For example, if the SBC for the current time period is 30%, the resulting SBC after upward adjustment will be greater than 30%, such as 35% or 40%.

[0140] The actual number of fast charging cycles obtained can fall within different fast charging cycle ranges. Therefore, the state of charge adjustment method corresponding to the fast charging cycle range can be used to adjust the starting state of charge to obtain an updated starting state of charge.

[0141] In some embodiments, the fast charging cycle interval may include at least one, and each fast charging cycle interval corresponds to an upward adjustment ratio. The larger the endpoint value of the fast charging cycle interval, the larger the upward adjustment ratio corresponding to the fast charging cycle interval.

[0142] At this point, based on the fast charging cycle range, the second state of charge adjustment method corresponding to the fast charging cycle range is used to update the startup state of charge, obtaining the updated startup state of charge, including:

[0143] Adjust the startup charge state by increasing the corresponding increase ratio within the fast charging cycle range to obtain the updated startup charge state.

[0144] Accordingly, by setting multiple fast charging cycle ranges, each corresponding to a different adjustment ratio, the adjustment ratio for adjusting the starting state of charge increases with the number of fast charging cycles. Since more fast charging cycles indicate more frequent fast charging, and fast charging has a significant impact on battery durability, the risk of a rapid decrease in the target vehicle's battery state of charge is also higher. Therefore, a larger adjustment ratio can be set to minimize the possibility of the battery rapidly losing power and failing to supply power to the vehicle in time. This can better meet the vehicle's energy needs and help maintain the performance of the range extender.

[0145] The specific settings for fast charging cycles and the corresponding increase ratios can be configured based on actual technical needs. For example, with three fast charging cycles set, the cycles include a first, second, and third fast charging cycle.

[0146] The upper limit of the first fast charging number interval is less than the first fast charging number threshold, and the upward adjustment ratio corresponding to the first fast charging number interval is the first upward adjustment ratio.

[0147] The second fast charging frequency range is greater than or equal to the first fast charging frequency threshold and less than or equal to the second fast charging frequency threshold. The upward adjustment ratio corresponding to the second fast charging frequency range is the second upward adjustment ratio, and the absolute value of the second upward adjustment ratio is greater than the absolute value of the first upward adjustment ratio.

[0148] The third fast charging frequency range is greater than the second fast charging frequency threshold. The upward adjustment ratio corresponding to the third fast charging frequency range is the third upward adjustment ratio, and the absolute value of the third upward adjustment ratio is greater than the absolute value of the second upward adjustment ratio.

[0149] The specific values ​​of the first fast charging number threshold, the second fast charging number threshold, the first increase ratio, the second increase ratio, and the second decrease ratio can be set according to specific technical needs, and are not specifically set in this embodiment.

[0150] In some embodiments, the fast charging cycle interval may include at least one, and each fast charging cycle interval corresponds to a target value of state of charge. The larger the endpoint value of the fast charging cycle interval, the larger the target value of state of charge corresponding to the fast charging cycle interval.

[0151] At this point, based on the fast charging cycle range, the second state of charge adjustment method corresponding to the fast charging cycle range is used to update the startup state of charge, obtaining the updated startup state of charge, including:

[0152] The state of charge (SOC) target value corresponding to the fast charging cycle range is used to update the startup SOC, resulting in the updated startup SOC.

[0153] Accordingly, by setting multiple different target values ​​for the state of charge (SOC), with each fast-charging interval corresponding to a different SOC target value, the updated SOC target value becomes larger as the number of fast-charging cycles increases. Since more fast-charging cycles indicate more frequent fast-charging, and fast-charging has a significant impact on battery durability such as lifespan, the risk of a rapid decrease in the SOC of the target vehicle's battery is also higher. Therefore, the SOC target value can be set larger to minimize the possibility of the battery rapidly losing power and failing to supply power to the vehicle in time. This can better meet the vehicle's energy needs and help maintain the performance of the range extender.

[0154] The specific settings for fast charging cycle intervals and the corresponding target values ​​for state of charge can be configured according to actual technical needs. For example, if three fast charging cycle intervals are set, these intervals would be: a first fast charging cycle interval, a second fast charging cycle interval, and a third fast charging cycle interval.

[0155] The upper limit of the first fast charging cycle interval is less than the first fast charging cycle threshold, and the target value of the state of charge corresponding to the first fast charging cycle interval is the first target value of the state of charge.

[0156] The second fast charging cycle interval is greater than or equal to the first fast charging cycle threshold and less than or equal to the second fast charging cycle threshold. The target value of the state of charge corresponding to the second fast charging cycle interval is the second target value of the state of charge. The absolute value of the second target value of the state of charge is greater than the absolute value of the first target value of the state of charge.

[0157] The third fast charging cycle interval is greater than the second fast charging cycle threshold. The target value of the state of charge corresponding to the third fast charging cycle interval is the third state of charge target value. The absolute value of the third state of charge target value is greater than the absolute value of the second state of charge target value.

[0158] The specific values ​​of the first fast charging number threshold, the second fast charging number threshold, the first state of charge target value, the second state of charge target value, and the third state of charge target value can be set according to specific technical needs. For example, in some examples, the first state of charge target value or the second state of charge target value is the default value of the starting state of charge set when the range extender leaves the factory, such as 30%, etc., but it is not limited to this. In this application embodiment, no specific setting is made for this.

[0159] Furthermore, in some embodiments, when the fast charging cycle interval may include more than two, some fast charging cycle intervals may each have an upward adjustment ratio, while some fast charging cycle intervals may have a target state of charge value. In this case, the larger the endpoint value of the fast charging cycle interval, the larger the upward adjustment ratio corresponding to the fast charging cycle interval, and the larger the target state of charge value corresponding to the fast charging cycle interval.

[0160] In some embodiments, the range extender control method further includes:

[0161] If the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, and the number of slow charging cycles is greater than or equal to the target slow charging cycle threshold, the startup charge state remains unchanged.

[0162] The target slow charging number threshold is a threshold used to determine the number of slow charging times that a target vehicle typically uses a home charging station to charge. The specific value of the target slow charging number threshold is not limited. It can be a preset threshold or it can be dynamically determined by combining the number of fast charging times and slow charging times in one or more time periods. This application embodiment does not show this in detail.

[0163] Therefore, if the number of slow charging cycles is greater than or equal to the target slow charging cycle threshold, it indicates that the target vehicle is usually charged using a home charging station. Due to the convenience of home charging stations, users are more likely to use them for frequent charging. Thus, if the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, it indicates that the use of fast charging is more likely to be temporary or sudden fast charging of the target vehicle. Fast charging is unlikely to be a regular occurrence for charging the target vehicle. Therefore, by maintaining the starting state of charge (SOC) without increasing it, the battery can supply power to the vehicle as much as possible, increasing the pure electric range and minimizing the number of battery charging cycles, thereby reducing the battery charging frequency and contributing to the maintenance and improvement of battery durability, such as lifespan.

[0164] In some embodiments, when the number of fast charging cycles is greater than or equal to a first fast charging cycle threshold and the number of slow charging cycles is less than a target slow charging cycle threshold, the startup charge state can be maintained unchanged, or the startup charge state can be updated using the method described in the above embodiments, based on the fast charging cycle range in which the fast charging cycles are located, using a second charge state adjustment method corresponding to the fast charging cycle range, but is not limited to this.

[0165] In some embodiments, the range extender control method further includes:

[0166] If the number of fast charging cycles is greater than or equal to the target fast charging cycle threshold, the starting charging state is set to the preset charging state.

[0167] The target fast charge count threshold is used to determine the number of times the target vehicle's starting state of charge will be adjusted to the default preset state of charge. The specific value of the target fast charge count threshold is not limited and can be determined by balancing factors such as the performance requirements of the range extender and the stability requirements of the battery performance.

[0168] If the number of fast charging cycles is greater than or equal to the target fast charging cycle threshold, it indicates that the number of times fast charging is used within that time period is relatively high. In this case, it means that even if there is a home charging station, it is not convenient for the target vehicle to use a home charging station for charging. For example, the target vehicle may be on a long journey or in an area far away from a home charging station. Therefore, by setting the starting charge state of the target vehicle to the default preset charge state, a balance can be struck between maintaining the pure electric range and fast charging, which helps to maintain and improve the driving experience.

[0169] In relevant embodiments of this application, the range extender control method may further include:

[0170] If the state of charge value obtained by adjusting the starting state of charge using the second state of charge adjustment method corresponding to the fast charging cycle range is greater than the upper limit state of charge threshold, the upper limit state of charge threshold is determined as the updated starting state of charge.

[0171] Based on this embodiment, by setting an upper limit threshold for the starting state of charge of the range extender, if the state of charge value obtained by updating the starting state of charge based on the upward adjustment parameter corresponding to the fast charging number interval is greater than the upper limit threshold, it indicates that the state of charge value obtained by adjustment is too large. An excessively large state of charge value is likely to cause frequent start-stop of the range extender. Therefore, the upper limit threshold of the starting state of charge can be directly set as the updated starting state of charge to improve the control accuracy and stability of the range extender.

[0172] In relevant embodiments of this application, the range extender control method may further include:

[0173] If the state of charge (SCC) value obtained by adjusting the down-adjustment parameter corresponding to the slow charging cycle interval is less than the lower limit SCC threshold, the lower limit SCC threshold is determined as the updated start-up SCC.

[0174] Based on this embodiment, by setting a lower limit threshold for the starting state of charge of the range extender, if the state of charge value obtained by adjusting the starting state of charge using the down-adjustment parameter corresponding to the slow charging cycle is less than the lower limit threshold, it indicates that the adjusted state of charge value is too small. An excessively small state of charge value can easily cause the range extender to fail to start in time, resulting in the target vehicle being unable to replenish energy in time. Therefore, the lower limit threshold of the starting state of charge can be directly set as the updated starting state of charge to improve the control accuracy and stability of the range extender.

[0175] The specific values ​​of the lower limit state of charge threshold and the upper limit state of charge threshold are not limited. In the relevant embodiments of this application, the lower limit state of charge threshold and the upper limit state of charge threshold can be set to 20% and 70% respectively, so that the starting state of charge of the range extender can be adjusted between 20% and 70%.

[0176] Based on the embodiments described above, the following examples illustrate the situation. In the examples below, the time period is 30 days, the first slow charging threshold is 4 times, the second slow charging threshold is 10 times, the first reduction ratio is 5%, the second reduction ratio is 10%, the first fast charging threshold is 1 time, the second fast charging threshold is 2 times, the first fast charging interval corresponds to the first increase ratio of 0, the second fast charging interval corresponds to the second increase ratio of 5%, and the third fast charging interval corresponds to the third increase ratio of 15%.

[0177] refer to Figure 6 As shown in this specific example, at the end of a 30-day time period, in step S601, the number of fast charging times Nq and slow charging times Ns of the target vehicle in the current time period, as well as the starting state of charge SOC1 of the range extender, are obtained, and then the process proceeds to steps S602, S603, and S604, in which the number of fast charging times Nq is compared with the corresponding first fast charging time threshold 1, respectively.

[0178] In step S602, the number of fast charging times Nq is compared with the first fast charging time threshold 1 to determine whether the number of fast charging times Nq is less than the first preset number 1, that is, whether the number of fast charging times Nq is 0. If so, proceed to steps S605, S606 and S607 to further compare the number of slow charging times Ns with the corresponding slow charging time threshold.

[0179] In step S603, the number of fast charging times Nq is compared with the first fast charging time threshold 1 and the second fast charging time threshold 2 to determine whether the number of fast charging times Nq is greater than or equal to the first fast charging time threshold 1 and less than or equal to the second fast charging time threshold 2, that is, whether the number of fast charging times Nq is equal to 1 or 2. If so, proceed to step S611.

[0180] In step S604, the number of fast charging cycles Nq is compared with the second fast charging cycle threshold 2 to determine whether the second fast charging cycle threshold 2 is greater than the second fast charging cycle threshold 2. If so, proceed to step S612.

[0181] In step S605, the number of slow charging times Ns is compared with the first slow charging time threshold 4 to determine whether the number of slow charging times Ns is less than or equal to the first slow charging time threshold 4. If so, proceed to step S608.

[0182] In step S606, the number of slow charging times Ns is compared with the first slow charging time threshold 4 and the second slow charging time threshold 10 to determine whether the number of slow charging times Ns is greater than the first slow charging time threshold 4 and less than or equal to the second slow charging time threshold 10. If so, proceed to step S609.

[0183] In step S607, the number of slow charging times Ns is compared with the second slow charging time threshold 10 to determine whether the number of slow charging times Ns is greater than the second slow charging time threshold 10. If so, proceed to step S610.

[0184] In step S608, if the number of slow charging times Ns is less than or equal to the first slow charging time threshold 4, since the number of fast charging times Nq is 0 at the same time, it means that the battery of the target vehicle has not been fast charged in the current time period, and the number of slow charging times is also limited. Therefore, it can be considered that the impact of charging on the battery performance is very small. Therefore, the current starting state of charge SOC1 can be maintained unchanged, and the starting state of charge SOC1 can be used as the updated starting state of charge SOC2.

[0185] In step S609, when the number of slow charging times Ns is greater than the first slow charging time threshold 4 and less than or equal to the second slow charging time threshold 10, since the number of fast charging times Nq is 0 at the same time, it means that no fast charging has been performed on the target vehicle's battery in the current time period, and there have been a certain number of slow charging times. Therefore, it can be considered that the user basically uses slow charging to charge the battery. Thus, the current starting state of charge SOC1 can be reduced by 5% to obtain the updated starting state of charge SOC2, so that the battery can supply power to the vehicle as much as possible, improve the pure electric range, and minimize the number of battery charging times, thereby reducing the battery charging frequency, which helps to maintain and improve battery durability, such as lifespan.

[0186] In step S610, when the number of slow charging times Ns is greater than the second slow charging time threshold 10, since the number of fast charging times Nq is 0 at the same time, it means that the target vehicle's battery has not been fast charged in the current time period, and the number of slow charging times is relatively high, indicating that the user is more likely to only use home charging piles for slow charging. Therefore, the current starting state of charge (SOC1) can be reduced by 10% to obtain the updated starting state of charge (SOC2), and the starting SOC can be further reduced to allow the battery to power the vehicle as much as possible, thereby increasing the pure electric range and minimizing the number of battery charging times, which helps to maintain and improve battery durability, such as lifespan.

[0187] In step S611, when the number of fast charging cycles Nq is 1 or 2, since electric vehicles typically fast charge no more than twice a month, this number of fast charging cycles is still within the acceptable range. However, fast charging will still affect battery performance, so the starting state of charge value SOC1 can be increased by a small amount, i.e., by 5%, to obtain the updated starting state of charge SOC2.

[0188] In step S611, if the number of fast charging cycles is greater than 2, since electric vehicles typically fast charge no more than twice a month, this number of fast charging cycles exceeds the recommended range and may have a significant impact on battery performance. Therefore, the starting state of charge (SOC1) value can be increased by a large margin, i.e., by 15%, to obtain the updated starting state of charge (SOC2).

[0189] based on Figure 6 A specific example can be seen in this example:

[0190] When the number of fast charging cycles is 0 and the number of slow charging cycles is less than or equal to 4, the startup state of charge (SOC1) remains unchanged, and the updated startup state of charge (SOC2) is obtained.

[0191] If the number of fast charging cycles is 0 and the number of slow charging cycles is greater than 4 and less than or equal to 10, the startup state of charge (SOC1) will be reduced by 5% to obtain the updated startup state of charge (SOC2).

[0192] If the number of fast charging cycles is 0 and the number of slow charging cycles is greater than 10, the startup state of charge (SOC1) will be increased by 10% to obtain the updated startup state of charge (SOC2).

[0193] If the number of fast charging cycles is 1 or 2, the first state of charge (SOC1) is increased by 5% to obtain the updated state of charge (SOC2).

[0194] If the number of fast charging cycles is greater than 2, the first state of charge (SOC1) is increased by 15% to obtain the updated state of charge (SOC2).

[0195] After the state of charge update is completed, the number of fast charging and slow charging times can be clearly recorded, thus starting the recording process for the number of fast charging and slow charging times in the next time period.

[0196] Based on the embodiments described above, another specific example is illustrated by taking a time period of 30 days, a first slow charge threshold of 4 times, a second slow charge threshold of 10 times, a first reduction ratio of 5%, a second reduction ratio of 10%, and a target slow charge threshold of 4 times as an example.

[0197] refer to Figure 7 As shown in this specific example, at the end of a 30-day time period, in step S701, the number of fast charging times Nq and slow charging times Ns of the target vehicle in the current time period, as well as the starting charge state SOC1 of the range extender, are obtained, and then the process proceeds to step S702, in which the number of fast charging times Nq is compared with the first fast charging time threshold 1.

[0198] In step S702, the number of fast charging times Nq is compared with the first fast charging time threshold 1 to determine whether the number of fast charging times Nq is less than the first preset number 1, that is, whether the number of fast charging times Nq is 0. If so, proceed to steps S703, S704 and S705 to further compare the number of slow charging times Ns with the corresponding slow charging time threshold. Otherwise, proceed to step S706 to further compare the number of slow charging times Ns with the target slow charging time threshold 4.

[0199] In step S703, the number of slow charging times Ns is compared with the first slow charging time threshold 4 to determine whether the number of slow charging times Ns is less than or equal to the first slow charging time threshold 4. If so, proceed to step S707.

[0200] In step S704, the number of slow charging times Ns is compared with the first slow charging time threshold 4 and the second slow charging time threshold 10 to determine whether the number of slow charging times Ns is greater than the first slow charging time threshold 4 and less than or equal to the second slow charging time threshold 10. If so, proceed to step S708.

[0201] In step S705, the number of slow charging times Ns is compared with the second slow charging time threshold 10 to determine whether the number of slow charging times Ns is greater than the second slow charging time threshold 10. If so, proceed to step S709.

[0202] In step S706, the number of slow charging times Ns is compared with the target slow charging time threshold 4 to determine whether the number of slow charging times Ns is greater than or equal to the target slow charging time threshold 4. If so, proceed to step S707.

[0203] In step S707, on the one hand, if the number of slow charging times Ns is less than or equal to the first slow charging time threshold 4, since the number of fast charging times Nq is 0 at the same time, it means that the battery of the target vehicle has not been fast charged in the current time period, and the number of slow charging times is also limited. Slow charging has a relatively small impact on the battery's durability, such as lifespan. Therefore, it can be considered that the impact of charging on the battery's performance is very small. Thus, the current starting state of charge SOC1 can be maintained unchanged, and the starting state of charge SOC1 can be used as the updated starting state of charge SOC2. On the other hand, if the fast charging number Nq is greater than or equal to the first fast charging number threshold 1 and the slow charging number Ns is greater than or equal to the target slow charging number threshold 4, it indicates that home charging piles are usually used to charge the target vehicle. Since home charging piles are convenient, users are more likely to use home charging piles for frequent charging. Therefore, by maintaining the starting state of charge unchanged and not increasing the starting state of charge, the battery can supply power to the vehicle as much as possible, thereby increasing the pure electric range and minimizing the number of battery charging cycles, which helps to maintain and improve battery durability, such as lifespan.

[0204] In step S708, when the number of slow charging times Ns is greater than the first slow charging time threshold 4 and less than or equal to the second slow charging time threshold 10, since the number of fast charging times Nq is 0 at the same time, it means that no fast charging has been performed on the target vehicle's battery in the current time period, and there have been a certain number of slow charging times. Therefore, it can be considered that the user basically uses slow charging to charge the battery. Thus, the current starting state of charge SOC1 can be reduced by 5% to obtain the updated starting state of charge SOC2, so that the battery can supply power to the vehicle as much as possible, improve the pure electric range, and minimize the number of battery charging times, thereby reducing the battery charging frequency and helping to maintain and improve battery durability, such as lifespan.

[0205] In step S709, when the number of slow charging cycles Ns is greater than the second slow charging cycle threshold of 10, since the number of fast charging cycles Nq is 0 at the same time, it means that the target vehicle's battery has not been fast charged in the current time period, and the number of slow charging cycles is relatively high, indicating that the user is more likely to only use a home charging station for slow charging. Therefore, the current starting state of charge (SOC1) can be reduced by 10% to obtain the updated starting state of charge (SOC2), further reducing the starting SOC to allow the battery to power the vehicle as much as possible, thereby increasing the pure electric range and minimizing the number of battery charging cycles, which helps to maintain and improve battery durability, such as lifespan.

[0206] based on Figure 7 A specific example can be seen in this example:

[0207] When the number of fast charging cycles is 0 and the number of slow charging cycles is less than or equal to 4, the startup state of charge (SOC1) remains unchanged, and the updated startup state of charge (SOC2) is obtained.

[0208] If the number of fast charging cycles is 0 and the number of slow charging cycles is greater than 4 and less than or equal to 10, the startup state of charge (SOC1) will be reduced by 5% to obtain the updated startup state of charge (SOC2).

[0209] If the number of fast charging cycles is 0 and the number of slow charging cycles is greater than 10, the startup state of charge (SOC1) will be increased by 10% to obtain the updated startup state of charge (SOC2).

[0210] If the number of fast charging cycles is greater than or equal to 1, and the number of slow charging cycles is greater than or equal to the target slow charging cycle threshold of 4, the startup charge state SOC1 remains unchanged, and the updated startup charge state SOC2 is obtained.

[0211] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0212] Based on the same inventive concept, this application also provides a range extender control device for implementing the range extender control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more range extender control device embodiments provided below can be found in the limitations of the range extender control method described above, and will not be repeated here.

[0213] In one embodiment, such as Figure 8 As shown, a range extender control device is provided, including: a data acquisition module 801 and an adjustment module 802, wherein:

[0214] The data acquisition module 801 is used to acquire the number of fast charging times and slow charging times of the target vehicle in the current time period, as well as the start-up charge status of the range extender associated with the target vehicle.

[0215] The adjustment module 802 is used to update the startup charge state based on the slow charging number range where the fast charging number is less than the first fast charging number threshold, and adopt the first charge state adjustment method corresponding to the slow charging number range to obtain the updated startup charge state. The first charge state adjustment method includes maintaining the status quo and adjusting downward.

[0216] In some embodiments, the data acquisition module 801 is further configured to receive a charging pile connection signal, determine the charging type based on the charging pile connection signal, the charging type including fast charging and slow charging; record the charging pile connection time when the determined charging type is slow charging; record the charging pile disconnection time when a charging pile disconnection signal is received; and determine whether to increase the number of slow charging cycles based on the charging duration and the time interval between the charging pile connection time and the charging pile disconnection time.

[0217] In some embodiments, the data acquisition module 801 is further configured to increment the number of slow charging cycles by 1 when the time interval between the charging pile connection time and the charging pile disconnection time is within a preset time interval and the charging duration is greater than or equal to the preset slow charging duration corresponding to the preset time interval; wherein the interval length of the preset time interval is greater than the preset slow charging duration.

[0218] In some embodiments, the preset time period is determined based on the range of off-peak electricity prices.

[0219] In some embodiments, the preset time period intervals include multiple preset time period intervals, and the preset slow charging durations corresponding to each preset time period interval may be the same or different.

[0220] In some embodiments, the data acquisition module 801 is further configured to record the charging pile connection time when the determined charging type is slow charging and the charging time is greater than or equal to a first preset time.

[0221] In some embodiments, the data acquisition module 801 is further configured to increment the fast charging count by 1 if the charging duration is greater than or equal to a second preset duration when the determined charging type is fast charging.

[0222] In some embodiments, the slow charging cycle intervals include at least two, and each slow charging cycle interval corresponds to a reduction ratio. The larger the endpoint value of the slow charging cycle interval, the larger the reduction ratio corresponding to the slow charging cycle interval.

[0223] The adjustment module 802 is also used to adjust the down-adjustment ratio corresponding to the slow charging cycle range of the startup charging state to obtain the updated startup charging state.

[0224] In some embodiments, the adjustment module 802 is further configured to update the startup charge state based on the fast charging number interval where the fast charging number is greater than or equal to the first fast charging number threshold, by adopting a second charge state adjustment method corresponding to the fast charging number interval, and obtain the updated startup charge state. The second charge state adjustment method includes maintaining the status quo and adjusting upward.

[0225] In some embodiments, the fast charging cycle interval includes at least two, and each fast charging cycle interval corresponds to an adjustment ratio or a target value of state of charge. The larger the endpoint value of the fast charging cycle interval, the larger the adjustment ratio or target value of state of charge corresponding to the fast charging cycle interval.

[0226] The adjustment module 802 is also used to adjust the startup charge state by the adjustment ratio corresponding to the fast charging number range to obtain the updated startup charge state.

[0227] or

[0228] The target value of the state of charge corresponding to the fast charging cycle interval is used as the updated startup state of charge.

[0229] In some embodiments, the adjustment module 802 is further configured to maintain the startup charge state unchanged when the number of fast charging cycles is greater than or equal to a first fast charging cycle threshold and the number of slow charging cycles is greater than or equal to a target slow charging cycle threshold.

[0230] Each module in the aforementioned range extender control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0231] In one embodiment, a range extender controller is provided, including a memory and a processor, the memory storing a computer program that, when executed by the processor, implements the steps of the range extender control method as described in any of the embodiments above.

[0232] In some embodiments, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the range extender control method in any of the embodiments described above.

[0233] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the range extender control method as described in any of the embodiments above.

[0234] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0235] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0236] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A range extender control method, characterized in that, The method includes: The system obtains the number of fast charging and slow charging cycles of the target vehicle within the current time period, as well as the start-up charge state of the range extender associated with the target vehicle. When the number of fast charging cycles is less than the first fast charging cycle threshold, based on the slow charging cycle range in which the number of slow charging cycles is located, the startup charge state is updated using a first state of charge adjustment method corresponding to the slow charging cycle range, and the updated startup charge state is obtained. The first state of charge adjustment method includes keeping it unchanged and adjusting it downward. The slow charging cycle intervals include at least two, and each slow charging cycle interval corresponds to a reduction ratio. The larger the endpoint value of the slow charging cycle interval, the larger the reduction ratio corresponding to the slow charging cycle interval. Based on the slow charging cycle range in which the slow charging cycles fall, a first state of charge adjustment method corresponding to the slow charging cycle range is used to update the startup state of charge, obtaining the updated startup state of charge, including: The startup charge state is adjusted by the downward adjustment ratio corresponding to the slow charging number range to obtain the updated startup charge state.

2. The method according to claim 1, characterized in that, The method also includes: Receive a charging pile connection signal, and determine the charging type based on the charging pile connection signal, wherein the charging type includes fast charging and slow charging; If the charging type is determined to be slow charging, record the charging station connection time; Upon receiving a signal indicating that the charging station has disconnected, record the time the charging station disconnects. Based on the charging time, and the time interval between the charging pile connection time and the charging pile disconnection time, it is determined whether to increase the number of slow charging cycles.

3. The method according to claim 2, characterized in that, Based on the charging duration, and the time interval between the charging pile connection time and the charging pile disconnection time, determine whether to increase the number of slow charging cycles, including: If the time interval between the charging pile connection time and the charging pile disconnection time is within a preset time interval, and the charging time is greater than or equal to the preset slow charging time corresponding to the preset time interval, the number of slow charging times is incremented by 1. Wherein, the interval length of the preset time period is greater than the preset slow charging time.

4. The method according to claim 3, characterized in that, Includes at least one of the following: First item: The preset time period is determined based on the range of off-peak electricity prices. Second item: The preset time period includes multiple intervals, and the preset slow charging time corresponding to each preset time period may be the same or different.

5. The method according to claim 2, characterized in that, Includes at least one of the following: First item: If the charging type is determined to be slow charging, record the charging station connection time, including: If the charging type is determined to be slow charging, and the charging time is greater than or equal to the first preset time, the charging station connection time is recorded. Second item: The method also includes: If the charging type is determined to be fast charging, and the charging time is greater than or equal to the second preset time, the fast charging count is incremented by 1.

6. The method according to claim 5, characterized in that, The preset time period includes a first preset time period and a second preset time period, wherein the second preset time period is a subset of the first preset time period. If the time interval between the charging pile connection time and the charging pile disconnection time is within the first preset time interval, and the charging time is greater than or equal to the first preset slow charging time, the slow charging count will be incremented by 1. If the time interval between the charging pile connection time and the charging pile disconnection time is within the second preset time interval, and the charging time is greater than or equal to the second preset slow charging time, the number of slow charging times will be incremented by 1. Wherein, the first interval of the first preset time period is longer than the first preset slow charging time, and the second interval of the second preset time period is longer than the second preset slow charging time.

7. The method according to any one of claims 1 to 5, characterized in that, The method also includes: When the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, based on the fast charging cycle range in which the fast charging cycle falls, the startup state of charge is updated using a second state of charge adjustment method corresponding to the fast charging cycle range, and the updated startup state of charge is obtained. The second state of charge adjustment method includes maintaining the current state of charge and adjusting it upwards.

8. The method according to claim 7, characterized in that, The fast charging cycle interval includes at least two, and each fast charging cycle interval corresponds to an adjustment ratio or a target value of state of charge. The larger the endpoint value of the fast charging cycle interval, the larger the adjustment ratio or target value of the fast charging cycle interval. Based on the fast charging cycle range in which the fast charging cycle falls, a second state of charge adjustment method corresponding to the fast charging cycle range is used to update the startup state of charge, obtaining the updated startup state of charge, including: The startup charge state is adjusted up by the up adjustment ratio corresponding to the fast charging number range to obtain the updated startup charge state. or The target value of the state of charge corresponding to the fast charging cycle interval is used as the updated startup state of charge.

9. The method according to any one of claims 1 to 5, characterized in that, The method also includes: If the number of fast charging cycles is greater than or equal to the first fast charging cycle threshold, and the number of slow charging cycles is greater than or equal to the target slow charging cycle threshold, the starting charge state remains unchanged.

10. The method according to any one of claims 1 to 5, characterized in that, The method also includes: If the number of fast charging cycles is greater than or equal to the target fast charging cycle threshold, the starting charging state is set to the preset charging state.

11. A range extender control device, characterized in that, The device includes: The data acquisition module is used to acquire the number of fast charging and slow charging times of the target vehicle in the current time period, as well as the start-up charge status of the range extender associated with the target vehicle. An adjustment module is used to update the startup state of charge based on the slow charging frequency range in which the fast charging frequency falls when the number of fast charging cycles is less than a first fast charging frequency threshold. This update is achieved by using a first state of charge adjustment method corresponding to the slow charging frequency range. The first state of charge adjustment method includes maintaining the current state and adjusting downwards. The slow charging frequency range includes at least two ranges, each corresponding to a downward adjustment ratio. The larger the endpoint value of each slow charging frequency range, the larger the downward adjustment ratio corresponding to that range. The adjustment module is used to adjust the starting charge state by the downward adjustment ratio corresponding to the slow charging number range, so as to obtain the updated starting charge state.

12. A range extender controller, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 9.

Images