Method and device for updating state of charge of range extender, controller and storage medium

Abstract

The application relates to a range extender starting state of charge updating method and device, a controller and a storage medium. The method comprises the following steps: obtaining a charging record of a vehicle; determining a charging capacity of the vehicle in a preset charging period through slow charging according to the charging record; determining a reference starting state of charge of a range extender of the vehicle based on the charging capacity and a full-charge capacity of a battery pack of the vehicle; and updating a starting threshold of the range extender according to the reference starting state of charge. The reference starting state of charge obtained through the charging record adjusts the starting threshold of the range extender, considers the use frequency and habit of a driver to a charging pile, can more accurately control the starting threshold of the range extender, makes the determined starting threshold of the range extender more in line with a user's daily use scene, can reduce the charging frequency of the range extender to the battery pack, and thus reduces the influence of the range extender driving on the battery pack of the vehicle.

Description

Technical Field

[0001] This application relates to the field of range-extended vehicle control technology, and in particular to a method, apparatus, controller and storage medium for updating the state of charge at startup of a range extender. Background Technology

[0002] In the electric vehicle sector, precise management of battery State of Charge (SOC) is crucial for improving vehicle range, energy efficiency, and extending battery life. Overcharging can cause irreversible damage to the battery, making real-time monitoring and refined management of SOC paramount. Range extenders, acting as supplementary energy devices for electric vehicles when the battery is low, automatically activate when the battery level drops below a preset SOC threshold. They then generate electricity using either fuel or hydrogen to charge the battery, ensuring continuous power supply during long-distance driving.

[0003] In related technologies, when controlling the range extender based on the current vehicle status information, it is easy to increase the number of instantaneous charging times of the battery pack, resulting in a greater impact on the vehicle battery pack when the range extender starts. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, apparatus, controller, computer-readable storage medium, and computer program product for updating the state of charge of a range extender that can reduce the number of times the battery pack is instantaneously charged, thereby reducing the impact on the vehicle battery pack, in order to address the above-mentioned technical problems.

[0005] Firstly, this application provides a method for updating the state of charge (SOC) during the startup of a range extender, including:

[0006] Obtain the vehicle's charging records, and based on the charging records, determine the amount of electricity the vehicle charges using slow charging within a preset charging cycle.

[0007] Based on the charging amount and the full charge of the vehicle's battery pack, a reference starting state of charge for the vehicle's range extender is determined.

[0008] The start-up threshold of the range extender is updated based on the reference start-up state of charge.

[0009] In one embodiment, determining a reference starting state of charge for the vehicle's range extender based on the charging capacity and the full charge capacity of the vehicle's battery pack includes:

[0010] Determine the full charge level of the vehicle's battery pack;

[0011] The charging percentage is determined based on the charging capacity and the full charge capacity.

[0012] The reference starting state of charge for the range extender of the vehicle is determined based on the charging percentage.

[0013] In one embodiment, determining the reference starting state of charge for the range extender of the vehicle based on the charging percentage includes:

[0014] The intermediate starting charge state is determined based on the charging percentage.

[0015] Based on the charging records, determine the proportion of times the vehicle was charged using the slow charging method;

[0016] The intermediate starting state of charge is updated based on the charging frequency ratio to obtain a reference starting state of charge for the vehicle's range extender.

[0017] In one embodiment, updating the intermediate starting state of charge based on the charging frequency ratio to obtain a reference starting state of charge for the vehicle's range extender includes:

[0018] An adjustment coefficient is determined based on the proportion of charging cycles; the adjustment coefficient is negatively correlated with the proportion of charging cycles.

[0019] The intermediate starting state of charge is updated according to the adjustment coefficient to obtain the reference starting state of charge for the range extender of the vehicle.

[0020] In one embodiment, updating the start-up threshold of the range extender based on the reference start-up state of charge includes:

[0021] Obtain the current startup threshold of the range extender;

[0022] If the reference start-up charge state is less than the current start-up threshold, the reference start-up charge state is mapped to the actual start-up threshold of the range extender.

[0023] In one embodiment, the range extender initiation state of charge update method further includes:

[0024] If the reference starting state of charge is not less than the current starting threshold, the current starting threshold is determined as the actual starting threshold of the range extender.

[0025] In one embodiment, acquiring the vehicle's charging records and determining, based on the charging records, the amount of electricity the vehicle charged using the slow charging method within a preset charging cycle includes:

[0026] The charging records of the vehicle within a preset time period are obtained, and if the vehicle is charged by the slow charging method within the preset time period based on the charging records, the target charging time and charging power of the vehicle by the slow charging method within a preset charging cycle are determined based on the charging records.

[0027] Based on the charging power and the target charging time, the amount of charge the vehicle receives when charged using the slow charging method is obtained.

[0028] Secondly, this application also provides a range extender start-up state of charge update device, comprising:

[0029] The charging capacity determination module is used to acquire the vehicle's charging records and, based on the charging records, determine the charging capacity of the vehicle during a preset charging cycle using the slow charging method.

[0030] A state of charge calculation module is used to determine a reference starting state of charge for the vehicle's range extender based on the charging capacity and the full charge capacity of the vehicle's battery pack.

[0031] A state of charge update module is used to update the start-up threshold of the range extender based on the reference start-up state of charge.

[0032] Thirdly, this application also provides a controller, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0033] Obtain the vehicle's charging records, and based on the charging records, determine the amount of electricity the vehicle charges using slow charging within a preset charging cycle.

[0034] Based on the charging amount and the full charge of the vehicle's battery pack, a reference starting state of charge for the vehicle's range extender is determined.

[0035] The start-up threshold of the range extender is updated based on the reference start-up state of charge.

[0036] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0037] Obtain the vehicle's charging records, and based on the charging records, determine the amount of electricity the vehicle charges using slow charging within a preset charging cycle.

[0038] Based on the charging amount and the full charge of the vehicle's battery pack, a reference starting state of charge for the vehicle's range extender is determined.

[0039] The start-up threshold of the range extender is updated based on the reference start-up state of charge.

[0040] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0041] Obtain the vehicle's charging records, and based on the charging records, determine the amount of electricity the vehicle charges using slow charging within a preset charging cycle.

[0042] Based on the charging amount and the full charge of the vehicle's battery pack, a reference starting state of charge for the vehicle's range extender is determined.

[0043] The start-up threshold of the range extender is updated based on the reference start-up state of charge.

[0044] The aforementioned method, apparatus, controller, computer-readable storage medium, and computer program product for updating the starting state of charge of a range extender determine the amount of charge the vehicle receives during a preset charging cycle via slow charging based on the vehicle's charging records. Based on the amount of charge received and the full charge level of the battery pack, a reference starting state of charge for the range extender is determined, and the starting threshold of the range extender is updated according to this reference starting state of charge. This allows for the determination of the reference starting state of charge based on the amount of charge received via slow charging, and the dynamic updating of the starting threshold of the range extender based on this reference starting state of charge. This makes the starting threshold of the range extender more closely match the vehicle's charging habits via slow charging, which helps reduce the number of times the battery pack needs instantaneous charging when using a range extender for range extension drive, thereby reducing the impact of range extension drive on the vehicle's battery pack. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart illustrating a method for updating the state of charge of a range extender during startup, as shown in one embodiment.

[0047] Figure 2 This is a flowchart illustrating a sub-step of step 102 in one embodiment;

[0048] Figure 3 This is a flowchart illustrating a sub-step of step 104 in one embodiment;

[0049] Figure 4 This is a flowchart illustrating a sub-step of step 106 in one embodiment;

[0050] Figure 5 This is a structural block diagram of the range extender start-up state of charge update device in one embodiment;

[0051] Figure 6 This is a diagram of the internal structure of the controller in one embodiment. Detailed Implementation

[0052] 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.

[0053] A range extender (RE), also known as an auxiliary power unit (APU) system, is an onboard power supply device used to extend the driving range of an electric vehicle. When the battery of an electric vehicle is low on power, the range extender automatically starts, converting chemical energy into electrical energy to power the battery and drive the electric motor, thereby extending the driving range of the electric vehicle.

[0054] Currently, existing range extender activation methods only focus on controlling decisions based on the current vehicle status information, failing to consider the driver's long-term habit of using home charging stations. In fact, if users have private parking spaces with slow charging facilities, or if their area has abundant slow charging resources, their daily charging activities largely rely on slow charging stations. Targeting the charging habits and usage scenarios of such users, adjusting the charging strategy accordingly can effectively improve battery efficiency and reduce overall vehicle energy consumption. Furthermore, the frequency and habits of drivers using charging stations directly lead to changes in the number of instantaneous battery charges and the duration of charging intervals. Current technology fails to dynamically adjust the range extender's State of Charge (SOC) based on this, thus affecting vehicle usability and effective control over SOC change trends.

[0055] In one exemplary embodiment, such as Figure 1 As shown, a method for updating the state of charge during the start-up of a range extender is provided. Taking the application of this method to a controller in a vehicle as an example, the method includes the following steps 102 to 106.

[0056] Step 102: Obtain the vehicle's charging record. Based on the charging record, determine the amount of electricity the vehicle charged using slow charging within a preset charging cycle.

[0057] The charging record is used to record charging data during vehicle charging. This record may include at least one of various charging data such as the charging method, charging start and end times, charging duration, charging current signal, or charging voltage signal. The charging method can be categorized into fast charging and slow charging based on charging power. For example, the charging power range for fast charging can be 30kW to 600kW, and for slow charging, it can be 1.5kW to 22kW. The charging start and end times may include the start and end times for each charging session. The charging duration describes the continuous duration of charging and can be calculated based on the start and end times. For instance, if a vehicle's charging starts at 18:30 and ends at 23:45, the charging duration can be determined as 5 hours and 15 minutes. The charging current signal can be the magnitude of the current during charging, and the charging voltage signal can be the magnitude of the voltage during charging.

[0058] The preset charging cycle is a pre-set charging cycle, such as, but not limited to, 24 hours, 12 hours, etc.

[0059] The charging capacity is the total amount of electricity generated when a vehicle is charged using slow charging within a preset charging cycle. It can be determined based on the target charging duration, the charging current signal, and the charging voltage signal. The target charging duration can be a single charging duration or the cumulative duration of multiple charging durations within the charging cycle, and can be flexibly set according to actual needs, such as 5h, 6h, or 8h. For example, the charging power is obtained by multiplying the charging current by the charging voltage, and the charging capacity is obtained by multiplying the charging power by the charging duration.

[0060] For example, a charging record might look like this: [Method: Slow charging | Voltage 230V × Current 16A | Duration 4.2h | Energy 14.8kWh].

[0061] In some embodiments, charging data for vehicles charged via slow charging within a preset charging cycle can be statistically analyzed. For example, for each charging cycle, the charging time via slow charging within that cycle can be accumulated to obtain the cumulative charging time within that cycle. If the cumulative charging time within a charging cycle reaches a target charging time, it can be considered that the charging time via slow charging within that cycle is relatively long. The amount of electricity charged via slow charging within that cycle can then be statistically analyzed to obtain the total amount of electricity charged by the vehicle via slow charging within that cycle. This amount of electricity can represent the cumulative charging amount for each charge when the vehicle is charged at least once via slow charging within a charging cycle. In some embodiments, the amount of charging done by the vehicle in each preset charging cycle via slow charging can be directly counted. For example, the cumulative amount of charging done by the vehicle in the preset charging cycle via slow charging can be determined. If the cumulative amount of charging reaches a preset power threshold, it can be considered that a large amount of power was charged by slow charging in that charging cycle. The required charging power can then be obtained based on the cumulative amount of charging done by the vehicle in that charging cycle via slow charging.

[0062] Optionally, the vehicle controller can acquire the vehicle's charging records. For example, the controller can acquire charging records within a preset time period. The preset time period can be flexibly set according to actual needs and may include at least one preset charging cycle, such as 30 days, 15 days, etc. The controller can analyze the charging records to determine the amount of electricity charged by the vehicle using various charging methods. For example, the charging methods may include fast charging and slow charging. The controller can determine the amount of electricity charged by the vehicle using slow charging based on the charging records. In some embodiments, the controller can determine a preset charging cycle and a target charging duration, and analyze the charging records according to the charging cycle and target charging duration to determine the amount of electricity charged by the vehicle using slow charging within the preset charging cycle to reach the target charging duration. In some embodiments, the controller can filter the charging records according to the charging cycle to select the charging records within that charging cycle. The controller can determine the corresponding charging power based on the charging records within that charging cycle, and calculate the amount of electricity charged based on the charging power and the target charging duration. The calculated amount of electricity charged can be used as the amount of electricity charged by the vehicle using slow charging within the preset charging cycle to reach the target charging duration. In other embodiments, the controller can filter charging records within a charging cycle and determine the amount of electricity charged via slow charging within that charging cycle based on the charging records. In some embodiments, the controller can filter charging records within a charging cycle and determine the proportion of charging times via slow charging in the charging records. If this proportion reaches a specified threshold, the controller determines the amount of electricity charged via slow charging within that charging cycle based on the charging records. The specified threshold can be determined based on experience or other feasible methods, such as, but not limited to, 80%.

[0063] In one implementation, the controller's filtering rules for charging record data may include: excluding abnormal charging records, such as invalid charging of less than 5 minutes; and limiting the time range of the charging record data, such as charging record data from the most recent 24 hours. For example, the charging records of a plug-in hybrid vehicle for the past 24 hours are as follows:

[0064] DC fast charging: 18kWh can be charged in 25 minutes (emergency power replenishment at charging stations);

[0065] AC slow charging: 15.6kWh in 4.5 hours (home charging station);

[0066] AC slow charging: 3.5 hours to charge 12.0kWh (commercial charging).

[0067] The charging records above show that the vehicle was charged with 27.6 kWh using slow charging.

[0068] In the above embodiments, by acquiring vehicle charging records and determining the charging amount through slow charging, the frequency and habits of the driver's use of the charging station within a preset charging cycle can be accurately obtained.

[0069] Step 104: Based on the charging amount and the full charge of the vehicle's battery pack, determine the reference starting state of charge for the vehicle's range extender.

[0070] The full charge capacity of the battery pack is the maximum electrical energy that the battery pack can store under standard conditions (such as 25°C), and the unit is kWh. The full charge capacity can be used as a benchmark value for calculating the state of charge (SOC) and as an energy reserve reference for determining the start-up timing of the range extender.

[0071] The reference starting state of charge is the threshold value of the remaining battery charge percentage when the range extender starts. It is a reference threshold calculated based on the charging amount and the full charge of the vehicle's battery pack, and is used to update the starting threshold of the range extender for the current charging cycle.

[0072] Optionally, the vehicle's controller can determine the reference starting state of charge (SBC) for the range extender based on the charging amount and the full charge level of the vehicle's battery pack. For example, a range-extended electric vehicle has a battery pack with a full charge of 40 kWh and an effective full charge of 39.2 kWh. During this charging cycle, the charging amount via slow charging is 28 kWh. The reference starting SBC for this electric vehicle = 1 - Charging amount / Full charge level = 1 - 28 / 39.2 ≈ 28.6%, and this charging cycle can be, but is not limited to, 24 hours.

[0073] In the above embodiments, the reference starting state of charge is calculated by using the charging capacity determined by slow charging and the full charge capacity of the battery pack, so that the determined reference starting state of charge is more in line with the user's daily charging habits.

[0074] Step 106: Update the start-up threshold of the range extender based on the reference start-up state of charge.

[0075] The start-up threshold is the percentage of remaining battery charge when the range extender starts. It represents the current start-up threshold of the range extender, which may be determined by factors such as the vehicle's charging status in the previous charging cycle or factory settings. It needs to be updated based on a reference start-up state of charge. For example, the factory setting for the start-up threshold can range from 20% to 70%, but typically it is set to 30%.

[0076] In one specific embodiment, the vehicle's controller calculates a reference starting state of charge (SOC) based on the amount of charge generated during slow charging and the full charge level of the battery pack. Assuming the calculated SOC is 28%, and the current range extender's starting threshold is 30%, the range extender's starting threshold is updated based on the SOC, ultimately adjusting it to 28% to meet the controller's setting standard for the range extender's starting threshold. This ensures the range extender can start and operate normally at the appropriate threshold, providing stable power support to the vehicle.

[0077] In the above embodiments, the charging amount of the vehicle using slow charging within a preset charging cycle is determined. A reference starting state of charge is obtained by combining the slow charging amount and the full charge amount. The range extender starting threshold is then adjusted based on the reference starting state of charge. This takes into account the driver's frequency and habits of using charging stations, enabling more precise control of the range extender starting threshold. This makes the determined range extender starting threshold more consistent with the user's daily usage scenarios, avoiding the problem of the range extender starting too early or too late due to a disconnect between the fixed range extender starting threshold and actual needs, thus improving the overall performance of the vehicle.

[0078] The aforementioned method for updating the starting state of charge (SOC) of the range extender determines the amount of charge the vehicle has made to reach the target charging time within a preset charging cycle by using slow charging, based on the vehicle's charging records. It then determines a reference starting SOC for the range extender based on the amount of charge and the full charge level of the battery pack, and updates the range extender's starting threshold accordingly. This method allows for a better match between the range extender's starting threshold and the vehicle's charging habits via slow charging, reducing the number of times the battery pack needs instantaneous charging when using the range extender for range extension drive, thereby mitigating the impact of range extender drive on the vehicle's battery pack.

[0079] In one exemplary embodiment, Figure 2 This is a flowchart illustrating the range extender startup state of charge update method in another embodiment, as shown below. Figure 2 The method for updating the state of charge at startup of the range extender shown is as follows: Figure 1 The sub-step of step 102 in the illustrated embodiment involves a specific implementation of determining the charging capacity of the vehicle via slow charging. Figure 1 Based on the illustrated embodiment, for any details not described in this embodiment, please refer to [the relevant documentation / reference needed]. Figure 1 The description in [the document] is as follows. Taking the application of this method to a controller in a vehicle as an example, the method includes the following steps 1021 to 1022:

[0080] Step 1021: Obtain the vehicle's charging records within a preset time period, and based on the charging records, determine the target charging duration and charging power of the vehicle within a preset charging cycle when the vehicle is being charged via slow charging within the preset time period.

[0081] The preset time period can be flexibly set according to actual needs, such as 30 days, 15 days, etc. The preset time period can include at least one preset charging cycle, meaning it can cover at least one charging cycle, thus allowing for the updating of the range extender start-up threshold based on charging data from at least one charging cycle. The target charging duration is the cumulative duration of one or more charging cycles within a charging cycle, such as, but not limited to, 6 hours, 8 hours, or 10 hours. The specific value of the target charging duration can be flexibly set based on historical charging records; this embodiment does not impose any limitations on this.

[0082] For example, the vehicle controller obtains the charging record data of the vehicle for the past 30 days and determines the charging method of the vehicle in the past 30 days based on the charging record data. If the vehicle has been using slow charging for the past 30 days, the target charging time and charging power for the vehicle using slow charging are determined based on the charging record. For example, if the vehicle uses slow charging for 6 hours every day (preset charging cycle) for the past 30 days (preset time period), the target charging time can be set to 6 hours.

[0083] Step 1022: Based on the charging power and target charging time, obtain the charging capacity of the vehicle when charging via slow charging.

[0084] For example, the charging capacity of the vehicle when charging via slow charging is obtained by multiplying the charging power by the target charging time.

[0085] In the above embodiments, the amount of electricity charged by the vehicle using only slow charging within a specific time period can be accurately calculated. This amount of electricity provides a key and reliable data foundation for subsequent optimization of the starting state of charge threshold.

[0086] In one exemplary embodiment, Figure 3 This is a flowchart illustrating the range extender startup state of charge update method in another embodiment, as shown below. Figure 3 The method for updating the state of charge at startup of the range extender shown is as follows: Figure 1 The sub-step of step 104 in the illustrated embodiment involves a specific implementation of determining a reference starting state of charge using the charging amount and the full charge level of the vehicle's battery pack. Figure 1 Based on the illustrated embodiment, for any details not described in this embodiment, please refer to [the relevant documentation / reference needed]. Figure 1 The description in [the document] is as follows. Taking the application of this method to a controller in a vehicle as an example, the method includes the following steps 1041 to 1043:

[0087] Step 1041: Determine the full charge level of the vehicle's battery pack.

[0088] Step 1042: Determine the charging percentage based on the charging capacity and the full charge capacity.

[0089] Among them, the charging percentage is the proportion of charging power to the full charge power.

[0090] In one embodiment, the charging percentage = charging amount / full charge amount. For example, the full charge amount of a range-extended electric vehicle's battery pack is 40kWh, and the effective full charge amount is 39.2kWh. The charging amount through slow charging in this charging cycle is 28kWh. Then the charging percentage = charging amount / full charge amount = 28 / 39.2 ≈ 71.4%.

[0091] Step 1043: Determine the reference starting state of charge for the vehicle's range extender based on the charging percentage.

[0092] In one embodiment, the intermediate starting state of charge (SFC) can be determined based on the charging percentage, and the proportion of times the vehicle was charged via slow charging can be determined based on charging records. The SFC is then updated according to this proportion to obtain a reference SFC for the vehicle's range extender. By dynamically setting the SFC based on the charging percentage, high-frequency charging users can set a lower range extender start-up threshold to prevent premature start-up.

[0093] The charging frequency ratio refers to the proportion of times the vehicle is charged via slow charging, specifically the proportion of times the vehicle is charged using a slow charging station. For example, based on the charging records of the last 30 days, we first determine the number of times the vehicle was charged via slow charging (E) and the number of times it was charged via DC charging (F). Then, the charging frequency ratio P = E / (E + F). For instance, if the charging records of the last 30 days show that the vehicle was charged via slow charging 30 times and via fast charging 0 times, then the charging frequency ratio P = 30 / (30 + 0) = 100%.

[0094] The intermediate starting state of charge is an intermediate value. For example, the intermediate starting state of charge can be 1 minus the charging percentage; for example, intermediate starting state of charge = 1 - charging percentage = 1 - 71.4% = 28.6%.

[0095] In one embodiment, updating the intermediate starting state of charge according to the charging time proportion to obtain the reference starting state of charge for the range extender of the vehicle may be: determining an adjustment coefficient according to the charging time proportion, wherein the adjustment coefficient is determined based on the charging time proportion and is negatively correlated with the charging time proportion, and updating the intermediate starting state of charge according to the adjustment coefficient to obtain the reference starting state of charge for the range extender of the vehicle.

[0096] In an exemplary embodiment, when the charging time proportion P satisfies P≥P1, the reference starting state of charge S is calculated by the following formula:

[0097] S=k1(1-B / C)×100%

[0098] Wherein B is the charged electric quantity, C is the full-charge electric quantity, P1 is a preset first threshold proportion, and k1 is the adjustment coefficient. In a possible embodiment, k1=1, P1=99%, and when the charging time proportion P≥99%, it can be considered that the vehicle has been charged all the time through the slow charging mode in the last 30 days, that is, the vehicle has been charged through the slow charging pile all the time in the last 30 days. For example, if it is determined according to the charging record that the proportion of the number of charging times performed through the slow charging pile is 100%, then k1=1, and the charged electric quantity accounts for 90% of the full-charge electric quantity, then B / C=90%, so that the reference starting state of charge S=k1(1-B / C)×100%=1*(1-90%)=10% can be obtained.

[0099] When the charging time proportion P satisfies P2≤P<P1, the reference starting state of charge S is calculated by the following formula:

[0100] S=k2×(1-B / C)×100%

[0101] Wherein B is the charged electric quantity, C is the full-charge electric quantity, P2 is a preset second threshold lower limit, and k2 is the adjustment coefficient. In a possible embodiment, k2=1.1, P2=90%, and when 90%≤charging time proportion P<99%, it can be considered that the vehicle is mostly charged through the slow charging mode in the last 30 days, that is, the vehicle is mostly charged through the slow charging pile in the last 30 days, and the adjustment coefficient is appropriately increased. For example, if it is determined according to the charging record that the proportion of the number of charging times performed through the slow charging pile is 90%, then k2=1.1, and the charged electric quantity accounts for 90% of the full-charge electric quantity, then B / C=90%, so that the reference starting state of charge S=k2×(1-B / C)×100%=1.1*(1-90%)=11% can be obtained.

[0102] When the charging time proportion P satisfies P<P2, the reference starting state of charge S is calculated by the following formula:

[0103] S = k3 × (1 - B / C) × 100%

[0104] Where B represents the charging capacity, C represents the full charge capacity, P2 is the preset second threshold lower limit, and k3 is the adjustment coefficient. In one possible embodiment, k3 = 1.2. When the charging frequency ratio P < 90%, it can be assumed that the vehicle has mostly been charged via slow charging in the past 30 days, but the number of times it has been charged via fast charging has increased. That is, the vehicle has mostly been charged via slow charging stations in the past 30 days, but the number of times it has been charged via fast charging stations has increased, so the adjustment coefficient should be appropriately increased. For example, if the charging frequency ratio via slow charging stations is determined to be 85% based on the charging records, then k3 = 1.2, and the charging capacity accounts for 90% of the full charge capacity, then B / C = 90%. Therefore, the reference starting state of charge can be obtained as S = k3(1-B / C) × 100% = 1.2 * (1-90%) = 12%.

[0105] The reason why the adjustment coefficient is negatively correlated with the proportion of charging cycles is that slow charging usually uses lower power, resulting in a gentler and more uniform charging process. This helps reduce battery stress, extend battery life, and maintain the battery's State of Health (SOH). When a vehicle frequently uses slow charging (high proportion of charging cycles), it indicates that the user has regular charging habits, the battery may be in a more stable state, and the usable capacity is more reliable. In this case, the adjustment coefficient can be appropriately lowered.

[0106] Risks of fast charging: If a vehicle uses slow charging less frequently (low charging frequency), it may rely more on fast charging (such as DC charging) or other non-ideal charging methods. While fast charging is quick, it can lead to increased battery temperature, lithium deposition, or accelerated capacity decay, thus increasing the risk of battery degradation. In this case, the battery's health may be poor, requiring a more conservative management strategy, and the adjustment factor may be appropriately increased.

[0107] In the above embodiments, the charging percentage is determined by the amount of slow charging and the full charge of the vehicle's battery pack. Based on the charging percentage, a reference starting state of charge (SBC) for the range extender is determined. When determining the reference SBC, the driver's usage data of the charging station is accurately obtained. The proportion of slow charging times for the vehicle is determined by the charging record data. The reference SBC is adjusted by the range of the slow charging times, and the adjustment coefficient is negatively correlated with the slow charging times. This takes into account the driver's frequency and habits of using the charging station, and can more accurately control the starting SBC of the range extender.

[0108] In one exemplary embodiment, Figure 4 This is a flowchart illustrating the range extender startup state of charge update method in another embodiment, as shown below. Figure 4The method for updating the state of charge at startup of the range extender shown is as follows: Figure 1 The sub-step of step 106 in the illustrated embodiment involves a specific implementation of updating the start-up threshold of the range extender based on a reference start-up state of charge, as described above. Figure 1 Based on the illustrated embodiment, for any details not described in this embodiment, please refer to [the relevant documentation / reference needed]. Figure 1 The description in [the document] is as follows. Taking the application of this method to a controller in a vehicle as an example, the method includes the following steps 1061 to 1063:

[0109] Step 1061: Obtain the current startup threshold of the range extender;

[0110] The current start threshold can be the battery remaining charge percentage threshold when the range extender starts. It is the current start threshold of the range extender, which may be due to the vehicle's charging status in the previous charging cycle or factory settings. It needs to be updated based on the reference start charge state.

[0111] For example, the factory setting value of the current startup threshold can be 20% to 70%. Typically, the factory setting value of the current startup state of charge can be set to 30%. For another example, assuming that the reference startup state of charge calculated in the previous charging cycle is 28%, the startup threshold in the previous charging cycle is updated to 28% based on the reference startup state of charge, so the current startup threshold is 28%.

[0112] Step 1062: If the reference start-up charge state is less than the current start-up threshold, map the reference start-up charge state to the actual start-up threshold of the range extender.

[0113] For example, suppose the reference starting state of charge (SBC) calculated using the aforementioned method is 10%, and the current starting threshold is 28%. Since 10% is less than the current starting threshold of 28%, the actual starting threshold is updated from 28% to 10%. In another example, the actual starting threshold range can be set to 20%~70%. With a reference starting SBC of 10% and a current starting threshold of 25%, 10% is less than 25%, but the lower limit of the actual starting threshold range is 20%. Therefore, the actual starting threshold is updated from 25% to 20%.

[0114] By referencing the starting state of charge to update the actual starting threshold of the range extender, the number of range extender starts can be further reduced, fuel consumption can be reduced, the number of times the range extender charges the battery pack can be reduced, and the battery pack life can be extended.

[0115] Step 1063: If the reference starting charge state is not less than the current starting threshold, the current starting threshold is determined as the actual starting threshold of the range extender.

[0116] For example, assuming that the reference starting state of charge calculated according to the aforementioned reference starting state of charge method is 30%, and the current starting threshold is 28%, 30% is not less than the current starting threshold of 28%, so the actual starting threshold of the range extender is still 28%.

[0117] In the above embodiments, the reference starting state of charge (SFC) obtained by the charging amount determined by the slow charging method and the full charge of the battery pack is used to determine the actual starting threshold of the range extender when the reference starting SFC is less than the current starting threshold. That is, when a home slow charging station can meet the charging needs, the range extender can be used as little as possible to reduce the number of times the range extender starts and charges the battery pack, thereby improving the battery range and battery life of the electric vehicle.

[0118] The aforementioned method for updating the starting state of charge (SOC) of the range extender determines the amount of charge the vehicle receives during a preset charging cycle via slow charging based on its charging records. It then determines a reference SOC for the range extender based on the amount of charge received and the full charge level of the battery pack. Finally, it updates the actual starting threshold of the range extender based on this reference SOC. This method allows for a better match between the actual starting threshold and the vehicle's charging habits via slow charging. This reduces the number of times the battery pack needs instantaneous charging when using the range extender for range extension, thus mitigating the impact of range extension on the vehicle's battery pack.

[0119] 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 in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0120] Based on the same inventive concept, this application also provides a range extender startup state of charge update device for implementing the aforementioned range extender startup state of charge update method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the range extender startup state of charge update device provided below can be found in the limitations of the range extender startup state of charge update method described above, and will not be repeated here.

[0121] In one exemplary embodiment, such as Figure 5 As shown, a range extender start-up state of charge (SOC) update device 500 is provided, comprising: a charging capacity determination module 510, a SOC calculation module 520, and a SOC update module 530, wherein:

[0122] The charging power determination module 510 is used to acquire the vehicle's charging record and determine the charging power of the vehicle during the slow charging method within a preset charging cycle based on the charging record.

[0123] The state of charge calculation module 520 is used to determine a reference starting state of charge for the range extender of the vehicle based on the charging amount and the full charge of the vehicle's battery pack.

[0124] The state of charge update module 530 is used to update the start-up threshold of the range extender according to the reference start-up state of charge.

[0125] The aforementioned range extender startup state of charge (SOC) update device includes a charging power determination module 510 that obtains vehicle charging records to determine the charging power through slow charging within a preset charging cycle, accurately capturing the driver's usage frequency and habits of charging stations. The SOC calculation module 520 calculates a reference startup SOC based on the charging power determined by slow charging and the battery pack's full charge, thereby updating the range extender's startup threshold. This dynamic adjustment of the startup SOC based on actual charging station usage avoids overcharging and battery damage, reduces the number of range extender starts, and optimizes battery efficiency. The SOC update module 530 updates the range extender's startup threshold using the reference startup SOC obtained from the charging power determined by slow charging and the battery pack's full charge. This considers the driver's usage frequency and habits of charging stations, enabling more precise control of the range extender's startup threshold. This ensures the determined startup SOC better matches the user's daily usage scenarios, preventing the range extender from starting too early or too late due to a fixed startup threshold that doesn't align with actual needs, thus improving overall vehicle performance.

[0126] In one exemplary embodiment, the state of charge calculation module 520 is further configured to determine the full charge level of the vehicle's battery pack.

[0127] The charging percentage is determined based on the charging capacity and the full charge capacity.

[0128] The reference starting state of charge for the range extender of the vehicle is determined based on the charging percentage.

[0129] In an exemplary embodiment, the state of charge calculation module 520 is further configured to determine an intermediate starting state of charge based on the charging percentage.

[0130] Based on the charging records, determine the proportion of times the vehicle was charged using the slow charging method;

[0131] The intermediate starting state of charge is updated based on the charging frequency ratio to obtain a reference starting state of charge for the vehicle's range extender.

[0132] In an exemplary embodiment, the state of charge calculation module 520 is further configured to determine an adjustment coefficient based on the proportion of charging cycles; the adjustment coefficient is negatively correlated with the proportion of charging cycles.

[0133] The intermediate starting state of charge is updated according to the adjustment coefficient to obtain the reference starting state of charge for the range extender of the vehicle.

[0134] In an exemplary embodiment, the state of charge update module 530 is further configured to obtain the current start-up threshold of the range extender;

[0135] If the reference start-up charge state is less than the current start-up threshold, the reference start-up charge state is updated to the actual start-up threshold of the range extender.

[0136] In an exemplary embodiment, the state of charge update module 530 is further configured to determine the current startup threshold as the actual startup threshold of the range extender if the reference startup state of charge is not less than the current startup threshold.

[0137] In an exemplary embodiment, the charging power determination module 510 is further configured to acquire the charging records of the vehicle within a preset time period, and, based on the charging records, determine the target charging duration and charging power of the vehicle within a preset charging cycle by using the slow charging method when the vehicle is being charged via the slow charging method within the preset time period.

[0138] Based on the charging power and the target charging time, the amount of charge the vehicle receives when charged using the slow charging method is obtained.

[0139] The modules in the aforementioned range extender's state of charge update device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the controller in hardware form or independent of it, or stored in the controller's memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0140] In one exemplary embodiment, a controller is provided, the internal structure of which can be shown in the following diagram. Figure 6 As shown, the controller includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a vehicle driving control method.

[0141] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the controller to which the present application is applied. A specific controller may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0142] In one exemplary embodiment, a controller is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0143] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0144] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0145] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0146] 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, and when executed, it 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 memory 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, artificial intelligence (AI) processors, etc., and are not limited to these.

[0147] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this application. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that for those skilled in the art, several modifications and improvements can be made 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 method for updating the state of charge during the start-up of a range extender, characterized in that, The method includes: Obtain the vehicle's charging records, and based on the charging records, determine the proportion of times the vehicle is charged via slow charging within a preset charging cycle. If the proportion of times the vehicle is charged reaches a specified threshold, determine the amount of electricity charged by the vehicle via slow charging within the charging cycle based on the charging records. Determine the full charge level of the vehicle's battery pack; The charging percentage is determined based on the ratio between the charging capacity and the full charge capacity. A reference starting state of charge for the range extender of the vehicle is determined based on the charging percentage. The start-up threshold of the range extender is updated based on the reference start-up state of charge.

2. The method according to claim 1, characterized in that, Determining the reference starting state of charge for the range extender of the vehicle based on the charging percentage includes: The intermediate starting charge state is determined based on the charging percentage. Based on the charging records, determine the proportion of times the vehicle was charged using the slow charging method; The intermediate starting state of charge is updated based on the charging frequency ratio to obtain a reference starting state of charge for the vehicle's range extender.

3. The method according to claim 2, characterized in that, The step of updating the intermediate starting state of charge based on the charging frequency ratio to obtain a reference starting state of charge for the vehicle's range extender includes: An adjustment coefficient is determined based on the proportion of charging cycles; the adjustment coefficient is negatively correlated with the proportion of charging cycles. The intermediate starting state of charge is updated according to the adjustment coefficient to obtain the reference starting state of charge for the range extender of the vehicle.

4. The method according to claim 1, characterized in that, The step of updating the start-up threshold of the range extender based on the reference start-up state of charge includes: Obtain the current startup threshold of the range extender; If the reference start-up charge state is less than the current start-up threshold, the reference start-up charge state is mapped to the actual start-up threshold of the range extender.

5. The method according to claim 4, characterized in that, The method further includes: If the reference starting state of charge is not less than the current starting threshold, the current starting threshold is determined as the actual starting threshold of the range extender.

6. The method according to any one of claims 1 to 5, characterized in that, The step of acquiring the vehicle's charging records involves determining, based on the charging records, the proportion of times the vehicle was charged via slow charging within a preset charging cycle. If this proportion reaches a specified threshold, the step of determining the amount of electricity charged via slow charging within the charging cycle, based on the charging records, includes: The system acquires the charging records of the vehicle within a preset time period, and determines, based on the charging records, that the vehicle is being charged using the slow charging method within the preset time period. Then, based on the charging records, it determines the proportion of times the vehicle is being charged using the slow charging method within a preset charging cycle. If the proportion of times the vehicle is being charged reaches a specified threshold, the system determines, based on the charging records, the target charging duration and charging power of the vehicle being charged using the slow charging method within the charging cycle. Based on the charging power and the target charging time, the amount of charge the vehicle receives when charged using the slow charging method is obtained.

7. A range extender start-up state of charge update device, characterized in that, The device includes: The charging power determination module is used to acquire the vehicle's charging records, determine the proportion of times the vehicle is charged via slow charging within a preset charging cycle based on the charging records, and determine the charging power of the vehicle via slow charging within the charging cycle based on the charging records when the proportion of times the vehicle is charged reaches a specified threshold. A state of charge (SCC) calculation module is used to determine the full charge capacity of the vehicle's battery pack; determine the charging percentage based on the ratio between the charging capacity and the full charge capacity; and determine a reference starting SCC for the vehicle's range extender based on the charging percentage. A state of charge update module is used to update the start-up threshold of the range extender based on the reference start-up state of charge.

8. A controller comprising a memory and a processor, the memory storing 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 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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