Intelligent power protection control method and device, vehicle and storage medium

Abstract

The invention discloses an intelligent power protection control method and device, a vehicle and a storage medium, and relates to the technical field of vehicles. The intelligent power protection control method is applied to an extended-range vehicle and comprises the steps that the current driving stage of the vehicle is determined, battery electric quantity state data are obtained, and a driving strategy of the vehicle is determined accordingly; driving the vehicle to start or run according to the driving strategy; the driving strategy at least comprises a battery driving mode and a range extender driving mode, the battery driving mode is a mode for driving the vehicle to run through a first battery and / or a second battery, the range extender driving mode is a mode for driving the vehicle to run through a range extender, and the vehicle demand power is determined according to the relative relation between the power of the range extender and the vehicle demand power. And setting modes of working states of the first battery and the second battery. Based on the technical scheme disclosed by the invention, not only can the power shortage oil consumption of the vehicle be reduced and the fuel economy be improved, but also the power response capability of the system can be enhanced, the health management optimization of the battery is realized and the driving experience is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically to an intelligent power-saving control method, device, vehicle, and storage medium. Background Technology

[0002] Currently, the power system of range-extended electric vehicles mainly consists of two parts: a high-power range extender (internal combustion engine-generator integrated unit) and a power battery; among them, the range extender can usually cover the power required by the whole vehicle.

[0003] However, existing range-extended electric vehicles (REEVs) have at least the following drawbacks in their power preservation strategies: First, under high-speed conditions, the range extender operates continuously under high load, leading to increased fuel consumption due to battery depletion and deteriorating fuel economy. To avoid this, the vehicle's acceleration power is usually limited, affecting the driving experience. Second, small-capacity batteries typically require a high SOC protection threshold, resulting in insufficient pure electric range (generally no more than 200km under CLTC conditions). Furthermore, the battery discharge power drops sharply when the battery is low, accelerating battery aging and limiting battery performance. Third, since the existing range extender power can cover the vehicle's power requirements, after activating intelligent power preservation, the range extender needs to frequently start and stop to balance fuel consumption and energy replenishment, resulting in decreased vehicle quietness and further impacting the driving experience. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an intelligent power-saving control method, device, vehicle, and storage medium to solve the technical problems of high fuel consumption when the vehicle is out of power, insufficient fuel economy, limited vehicle acceleration power and battery performance, and insufficient driving experience in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an intelligent power-saving control method for use in range-extended vehicles, comprising: Determine the current driving stage of the vehicle and obtain battery power status data; The vehicle's driving strategy is determined based on the vehicle's current driving stage and battery charge status data. According to the driving strategy, the vehicle is driven to start or move; The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

[0006] In some embodiments, determining the vehicle's driving strategy based on the vehicle's current driving stage and battery charge status data includes: When the vehicle is in the starting phase and the charge of both the first battery and the second battery is less than or equal to a first threshold, the driving strategy of the vehicle is determined to be the range extender driving mode. When the vehicle is in the start-up phase and the charge of at least one of the first and second batteries is greater than a first threshold, the driving strategy of the vehicle is determined to be battery driving mode. When the vehicle is in a steady operating phase and the charge of at least one of the first and second batteries is less than a second threshold, the driving strategy of the vehicle is determined to be the range extender driving mode. When the vehicle is in a stable operating phase and the charge levels of both the first and second batteries are greater than or equal to the second threshold, the driving strategy of the vehicle is determined to be battery driving mode.

[0007] In some embodiments, determining that the vehicle's driving strategy is a battery-driven mode includes: Compare and determine the relationship between the remaining charge of the first and second batteries; Based on the relationship between the remaining charge of the first battery and the second battery, the battery with the relatively higher remaining charge is used to drive the vehicle.

[0008] In some embodiments, setting the operating states of the first and second batteries based on the relative relationship between the range extender's power and the vehicle's power demand includes: When the power of the range extender is greater than the power required by the vehicle, the remaining power of the range extender is used to charge the first battery or the second battery. When the power of the range extender is less than the power required by the vehicle, it is supplemented by discharging using the first battery or the second battery.

[0009] In some embodiments, the step of using the remaining power of the range extender to charge the first battery or the second battery when the power of the range extender exceeds the power required by the vehicle includes: Compare and determine the relationship between the remaining charge of the first and second batteries; The order in which the first and second batteries are charged is determined based on the relationship between the remaining charge levels of the first and second batteries. According to the aforementioned order, the two batteries are charged sequentially until both batteries reach the second threshold level.

[0010] In some embodiments, when the power of the range extender is less than the vehicle's required power, the method of using a first battery or a second battery to discharge and supplement the motor includes: Compare and determine the relationship between the charge levels of the first and second batteries; Based on the relationship between the charge levels of the first and second batteries, determine the order in which the first and second batteries discharge. According to the aforementioned sequence, the two batteries are discharged and replenished sequentially until the charge of both batteries reaches the third threshold.

[0011] In some embodiments, determining the vehicle's driving strategy based on the vehicle's current driving stage and battery charge status data further includes: When the charge levels of both the first and second batteries are less than or equal to a third threshold, the vehicle's driving strategy is determined to be range extender driving mode, and the vehicle is controlled to enter a power-limited mode.

[0012] Secondly, the present invention also provides an intelligent power-saving control device for use in range-extended vehicles, comprising: The acquisition module is used to determine the current driving stage of the vehicle and acquire battery power status data; The determination module is used to determine the vehicle's driving strategy based on the vehicle's current driving stage and battery power status data. A drive module is used to drive the vehicle to start or move according to the drive strategy. The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

[0013] Thirdly, the present invention also provides a range-extended vehicle, comprising: a processor and a memory; the memory storing a computer program executable by the processor; the processor executing the computer program implements the steps of the intelligent power-saving control method as described in the first aspect.

[0014] Fourthly, the present invention also provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the intelligent power-saving control method as described in the first aspect.

[0015] Compared with the prior art, the present invention provides an intelligent power-saving control method, device, vehicle, and storage medium. After determining the current driving stage of the vehicle and acquiring battery power status data, it can determine the vehicle's driving strategy based on the current driving stage and battery power status data, and drive the vehicle to start or drive according to the driving strategy. The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the working states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

[0016] In this way, when the vehicle is in range extender drive mode, the range extender's remaining power can be used to charge the first or second battery, or to discharge the motor, depending on the relationship between the range extender's power and the vehicle's power demand. Thus, the range extender and the dual batteries can form a dynamic power structure, intelligently coordinating to meet the vehicle's power needs. This not only optimizes the vehicle's energy flow management, improves the overall efficiency of the powertrain, and reduces the equivalent fuel consumption rate in battery-saving mode, thus improving fuel economy, but also allows the range extender to operate continuously within its optimal thermal efficiency range. Combined with a closed-loop energy replenishment strategy, this can reduce fuel consumption when the battery is depleted.

[0017] Meanwhile, the intelligent control strategy based on the state of charge of the dual batteries can dynamically designate the discharging and charging batteries, thereby avoiding deep discharge of a single battery pack and balancing the state of charge (SOC) of the dual batteries to a healthy high range during driving. This not only helps improve the power response capability of the power system, but also extends the cycle life of the power battery pack, slows down battery capacity decay, optimizes battery health management, and enhances the driving experience. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating an intelligent power-saving control method in one embodiment of the present invention; Figure 2 This is a schematic diagram of the battery-driven mode implementation in one embodiment of the present invention; Figure 3 This is a schematic diagram of the battery charging process in the range extender drive mode in one embodiment of the present invention; Figure 4 This is a schematic diagram of the battery discharge process in the range extender drive mode in one embodiment of the present invention; Figure 5 This is a schematic diagram of the control logic of the intelligent power-saving control method in one embodiment of the present invention; Figure 6 This is a schematic block diagram of an intelligent power-saving control device in one embodiment of the present invention; Figure 7This is a schematic block diagram of a range-extended vehicle in one embodiment of the present invention; Figure 8 This is a schematic block diagram of an electronic device in a range-extended vehicle according to one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 100, Intelligent power-saving control device; 110, Acquisition module; 120, Determination module; 130, Drive module; 200, Range-extended vehicle; 210, Motor; 220, Power battery; 221, First battery; 222, Second battery; 230, Range extender; 240, Electronic device; 241, Device bus; 242, Processor; 243, Storage medium; 2431, Operating system; 2432, Computer program; 244, Internal memory; 245, Network interface. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] To address the aforementioned technical problems, this invention provides an intelligent power-saving control method, device, vehicle, and storage medium, which not only reduces fuel consumption when the vehicle is out of power and improves fuel economy, but also enhances the system's power response capability, optimizes battery health management, and improves the driving experience.

[0022] Please see Figure 1 , Figure 1 This is a flowchart illustrating an intelligent power-saving control method in one embodiment of the present invention. This intelligent power-saving control method can be applied to range-extended vehicles to achieve intelligent power-saving for range-extended vehicles.

[0023] Specifically, the range-extended vehicle may include an electric motor, a range extender, and multiple power batteries. The range extender and each power battery can drive the electric motor to enable the vehicle to move.

[0024] In one embodiment, the range extender can be a low-power range extender with a power output of less than or equal to 50kW. In this case, when the vehicle is operating at high speed, the power output of the low-power range extender is usually insufficient to cover the power requirements of the entire vehicle. Therefore, a battery-driven motor can be used, or the range extender can be used to drive the vehicle, with the battery providing additional power.

[0025] Meanwhile, the range-extended vehicle can be configured with a dual-battery architecture, that is, the aforementioned power battery can be configured as two, which can be referred to as the first battery and the second battery respectively. The first battery and the second battery can use power batteries of the same specification or power batteries of different specifications, and there is no specific limitation on this.

[0026] Taking the first battery as an example, to optimize battery health management, a first threshold, a second threshold, and a third threshold can be set for the SOC of the first battery through the Battery Management System (BMS). The first threshold is the protection threshold under normal discharge conditions, the second threshold represents the recommended threshold for the high range of remaining battery capacity, and the third threshold represents the extreme low range of remaining battery capacity.

[0027] Understandably, the upper limit of the SOC of the first battery during charging can be controlled at the aforementioned second threshold to avoid overcharging. During normal discharge, the SOC of the first battery is preferably not lower than the aforementioned first threshold to avoid a sudden drop in its discharge power and to delay battery aging. Of course, under extreme circumstances, the SOC of the first battery during discharge should not be lower than the aforementioned third threshold to avoid over-discharge.

[0028] Based on this, regardless of whether the second battery uses the same or different specifications of the power battery as the first battery, the same or different first threshold, second threshold and third threshold can be set for it in the same way as described above.

[0029] For example, in one embodiment, the first battery and the second battery described above can be power batteries of the same specifications. In this case, the first battery and the second battery can use the same first threshold, second threshold, and third threshold; wherein, the first threshold can be 20% of the battery's rated capacity, the second threshold can be 90% of the battery's rated capacity, and the third threshold can be 5% of the battery's rated capacity.

[0030] Of course, in some other embodiments, the first threshold, second threshold and third threshold of the first battery and the second battery may also be other values, which can be determined according to the corresponding battery specifications and parameters, and are not specifically limited here.

[0031] Please see Figure 1 In this embodiment, based on the aforementioned range-extended vehicle, the intelligent power-saving control method may include the following steps: Determine the current driving stage of the vehicle and obtain battery power status data; The vehicle's driving strategy is determined based on the vehicle's current driving stage and battery charge status data. According to the driving strategy, the vehicle is driven to start or move; The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

[0032] It is understandable that a vehicle's driving phase can include at least the starting phase and the stable driving phase; during the starting phase and the stable driving phase, there are significant differences in the vehicle's power output characteristics, energy consumption performance, and the working status of the battery and motor.

[0033] Typically, a vehicle requires high power, high energy consumption, and high torque during the initial acceleration phase, while maintaining low power, low energy consumption, and stable torque during stable driving. Therefore, when determining the vehicle's drive strategy, it is necessary to consider the current driving phase to meet the specific needs of different driving stages.

[0034] Based on this, for this range-extended vehicle, after determining the current driving stage of the vehicle, it is also necessary to obtain the battery charge status data of the power battery, determine the remaining charge of the power battery, and then determine the vehicle's driving strategy to avoid overcharging and over-discharging of the power battery, so as to achieve intelligent power protection.

[0035] After determining the current driving stage of the vehicle and obtaining the battery state data of the first and second batteries, the vehicle's driving strategy can be further determined.

[0036] In this embodiment, the vehicle's motor can be driven by a battery or by a range extender, so the vehicle's driving strategy can include at least a battery-driven mode and a range extender-driven mode.

[0037] When the vehicle's power battery uses the aforementioned first battery and second battery, the battery drive mode can include the first battery drive mode, the second battery drive mode, and the mode in which both batteries drive the vehicle together. All three modes are pure electric drive modes.

[0038] In one embodiment, when the vehicle is in the start-up phase, the step of "determining the vehicle's driving strategy based on the vehicle's current driving phase and battery charge status data" may include: When the vehicle is in the starting phase and the charge of both the first and second batteries is less than or equal to the first threshold, the vehicle's driving strategy is determined to be the range extender driving mode. When the vehicle is in the start-up phase and the charge of at least one of the first and second batteries is greater than a first threshold, the vehicle's driving strategy is determined to be battery driving mode.

[0039] Specifically, during the vehicle's start-up phase, although theoretically the first battery, the second battery, and the range extender can all drive the motor to start the vehicle, considering the SOC of the power battery, it is necessary to combine the remaining charge of the first and second batteries to determine whether to use the power battery to drive the motor to start the vehicle. On the one hand, it is necessary to avoid using a battery with too low remaining charge to drive the motor, and on the other hand, it is necessary to avoid the range extender charging a battery with too high remaining charge, which would lead to overcharging of the battery.

[0040] Therefore, when the remaining charge of at least one of the first and second batteries is greater than the corresponding protection threshold (i.e., the first threshold), the battery with the higher remaining charge can be used to drive the motor to start the vehicle; when the remaining charge of both the first and second batteries is less than or equal to the corresponding protection threshold (i.e., the first threshold), the range extender can be used to drive the motor to start the vehicle.

[0041] For example, in one embodiment, the first battery and the second battery use power batteries of the same specifications, and the first threshold of each battery is 20% of its rated capacity, the second threshold is 90% of its rated capacity, and the third threshold is 5% of its rated capacity.

[0042] At this point, based on the remaining charge of the two batteries, when the remaining charge of at least one of the first and second batteries is greater than 20% of its rated capacity, the battery with the higher remaining charge can be used to drive the motor to start the vehicle. For example, when the remaining charge of the first battery is 30% and the remaining charge of the second battery is 15%, the first battery can be used to drive the motor to start the vehicle.

[0043] Conversely, if the remaining charge of both the first and second batteries is less than or equal to 20% of their rated capacity, the range extender can be used to drive the motor to start the vehicle. In this case, avoiding using either the first or second battery to drive the motor and instead using the range extender to start the vehicle can prevent the battery charge from becoming too low and help with battery health management.

[0044] In one embodiment, when the vehicle is in a stable driving phase, the step of "determining the vehicle's driving strategy based on the vehicle's current driving phase and battery charge status data" may include: When the vehicle is in a steady operating phase and the charge of at least one of the first and second batteries is less than the second threshold, the vehicle's driving strategy is determined to be the range extender driving mode. When the vehicle is in a stable operating phase and the charge levels of both the first and second batteries are greater than or equal to the second threshold, the vehicle's driving strategy is determined to be battery-driven mode.

[0045] Specifically, during stable driving, the vehicle is generally in a state of relatively low power, low energy consumption, and stable torque. At this time, the vehicle's driving strategy can be set to battery drive mode or range extender drive mode as needed, and the specific choice can be further determined based on the remaining battery charge.

[0046] At this time, when the remaining power of both the first battery and the second battery reaches the corresponding second threshold, the driving strategy can adopt the first battery driving mode or the second battery driving mode; when the remaining power of at least one of the first battery and the second battery is less than the corresponding second threshold, the driving strategy can adopt the range extender driving mode.

[0047] For example, in one embodiment, when the first battery and the second battery use power batteries of the same specifications, and each battery has a first threshold of 20% of its rated capacity, a second threshold of 90% of its rated capacity, and a third threshold of 5% of its rated capacity, the driving strategy can be determined based on the relative relationship between the remaining power of the two batteries and the corresponding second threshold.

[0048] At this point, when the remaining charge of both the first and second batteries reaches 90% of their rated capacity, in order to avoid the range extender from continuing to charge the batteries, either the first or second battery can be used to drive the motor to achieve stable vehicle operation.

[0049] When the remaining charge of at least one of the first and second batteries is less than 90% of its rated capacity, if the vehicle's intelligent power-saving mode is activated, the range extender can be used to drive the motor to achieve stable vehicle operation.

[0050] It should be noted that when the remaining charge of at least one of the first and second batteries is less than 90% of its rated capacity, it does not mean that the vehicle can only be driven by the range extender. It actually means that at least one of the two batteries can continue to be charged to achieve intelligent power preservation.

[0051] Therefore, when the remaining charge of at least one of the first and second batteries is less than 90% of its rated capacity, the vehicle can also use the battery with the higher remaining charge to drive the motor. Of course, when the vehicle is in intelligent power-saving mode, the range extender can also be used to drive the motor and the remaining power of the range extender can be used to charge the battery with the lower remaining charge.

[0052] For example, in one embodiment, when the remaining charge of the first battery is 90% and the remaining charge of the second battery is 75%, the first battery can be used to drive the motor. However, when the vehicle's intelligent power-saving mode is activated, the range extender can also be used to drive the motor. In this case, if the power of the range extender is greater than the power required by the vehicle, the remaining power of the range extender can be used to charge the second battery until the remaining charge of the second battery reaches its second threshold, at which point charging can be stopped.

[0053] It is understood that, in this embodiment, as Figure 2 As shown, regardless of whether the vehicle is in the start-up phase or the steady operation phase, when the vehicle activates the intelligent power-saving mode and determines the vehicle's driving strategy as battery-driven mode according to the above method, the intelligent power-saving control method may include the following steps: Compare and determine the relationship between the remaining charge of the first and second batteries; Based on the relationship between the remaining charge of the first battery and the second battery, the battery with the relatively higher remaining charge is used to drive the vehicle.

[0054] In this embodiment, when the vehicle adopts the range extender drive mode, the aforementioned "driving the vehicle through the range extender and setting the working states of the first and second batteries according to the relative relationship between the power of the range extender and the power demand of the vehicle" may specifically include: When the range extender power is greater than the vehicle's required power, the remaining power of the range extender is used to charge the first or second battery. When the range extender's power is less than the vehicle's required power, it is supplemented by discharging using either the first or second battery.

[0055] Specifically, when the range extender is used to drive the motor, the range extender's remaining power can be used to charge one of the power batteries, or one of the batteries can be used to discharge and supplement the motor, depending on the relative relationship between the range extender's power and the vehicle's required power.

[0056] In practical applications, such as Figure 3 As shown, the aforementioned "when the range extender's power exceeds the vehicle's required power, using the range extender's remaining power to charge the first or second battery" can specifically include: Compare and determine the relationship between the remaining charge of the first and second batteries; The order in which the first and second batteries are charged is determined based on the relationship between the remaining charge levels of the first and second batteries. According to this order, the two batteries are charged sequentially until both batteries reach the second threshold.

[0057] It is understandable that when using the range extender drive mode, if the range extender power is greater than the vehicle's required power, the remaining power of the range extender can be used to charge either the first battery or the second battery. The specific decision to charge the first battery or the second battery can be made based on the relationship between the remaining power of the first battery and the second battery.

[0058] For example, when the remaining power of the first battery is greater than that of the second battery, the remaining power of the range extender can be used to charge the second battery, which has a relatively lower remaining power. When the remaining power of the second battery reaches the second threshold, the remaining power of the range extender can continue to be used to charge the first battery until the remaining power of the first battery also reaches the second threshold.

[0059] Of course, in some embodiments, if the first battery and the second battery have different specifications, the order in which the two batteries discharge can be determined based on their different specifications.

[0060] For example, if the rated capacity of the first battery is greater than that of the second battery, i.e. the first battery is the main battery and the second battery is the auxiliary battery, when the remaining power of both the first battery and the second battery reaches the corresponding second threshold, the first battery can be used to drive the motor.

[0061] When the remaining charge of the first discharged battery drops to the corresponding protection threshold (i.e., the first threshold), another battery can be switched to drive the motor. Alternatively, the intelligent power-saving mode can be activated as needed, and a range extender can be used to drive the motor and charge the discharged battery.

[0062] In one embodiment, please refer to Figure 4 The aforementioned step of "using the first or second battery to supplement discharge when the range extender power is less than the vehicle's required power" may specifically include: Compare and determine the relationship between the charge levels of the first and second batteries; Based on the relationship between the charge levels of the first and second batteries, determine the order in which the first and second batteries discharge. According to the aforementioned sequence, the two batteries are discharged and replenished sequentially until the charge of both batteries reaches the third threshold.

[0063] Specifically, when using the range extender drive mode, if the range extender power is less than the vehicle's required power, that is, the range extender power cannot meet the vehicle's needs, the first battery or the second battery can be used for discharge supplementation. Whether to use the first battery or the second battery for discharge supplementation can be determined based on the relationship between the remaining charge of the two batteries, with the battery with the relatively higher remaining charge being preferred for discharge supplementation.

[0064] For example, when the remaining charge of the first battery is greater than that of the second battery, the first battery can be used to discharge and replenish it, so that it can work with the range extender to drive the motor to meet the vehicle's power requirements. This continues until the remaining charge of the first battery drops to a first threshold, at which point the second battery can be switched to discharge and replenish the motor until the remaining charge of the second battery also drops to the first threshold.

[0065] If it is necessary to continue driving the vehicle, the battery with the higher remaining charge can be selected from the first and second batteries to continue discharging and replenishing the motor.

[0066] For example, assuming that the remaining power of the first battery is greater than that of the second battery (which can be determined by referring to the corresponding rated capacity), the first battery can continue to discharge and replenish the motor until the remaining power of the first battery drops to the corresponding third threshold. Then, the second battery can be switched to discharge and replenish the motor until the remaining power of the second battery also drops to the corresponding third threshold.

[0067] In one embodiment, when the remaining charge of both the first battery and the second battery reaches the corresponding second threshold after charging, the vehicle's driving strategy can be switched to either the first battery driving mode or the second battery driving mode, as can be seen from the method for determining the vehicle's driving strategy described above.

[0068] Understandably, since the second threshold is the recommended threshold for the two batteries in the high charge range, when the remaining charge of both batteries begins to be greater than or equal to the second threshold, either the first battery or the second battery can be selected to drive the motor, maintain the normal operation of the vehicle, and avoid overcharging of the first battery and the second battery.

[0069] In one embodiment, when the remaining charge of both the first and second batteries drops to the aforementioned third threshold after discharge, the intelligent power-saving control method may further include the following steps: When the charge levels of both the first and second batteries are less than or equal to the third threshold, the vehicle's driving strategy is determined to be range extender driving mode, and the vehicle is controlled to enter power-limited mode.

[0070] Understandably, when the remaining charge of both the first and second batteries drops to the third threshold (i.e., their charge levels are both less than or equal to the third threshold), the vehicle's driving strategy can be switched to a power-limiting mode (i.e., limp mode) to reduce the vehicle's power demand. This ensures that the range extender can at least meet the vehicle's power requirements, or even have surplus power to charge the two batteries sequentially. In this case, if the range extender has surplus power, the charging order of the two batteries can be set as needed, without specific restrictions.

[0071] It should be noted that, in this embodiment, based on the various thresholds set for the first and second batteries, the intelligent power-saving control method includes at least three common operating modes. Taking the case where the first and second batteries use batteries of the same specification, and the first threshold for each battery is 20% of its rated capacity, the second threshold is 90% of its rated capacity, and the third threshold is 5% of its rated capacity as an example, these three operating modes can be referred to as the first mode, the second mode, and the third mode, respectively.

[0072] Please see Figure 5 In this embodiment, when the remaining power of both batteries is greater than 20% (i.e., the first threshold), the vehicle can be determined to be in the first mode; when the remaining power of one battery is greater than 20% and the remaining power of the other battery is less than or equal to 20%, the vehicle can be determined to be in the second mode; when the remaining power of both batteries is less than or equal to 20%, the vehicle can be determined to be in the third mode.

[0073] In the first mode, the battery with relatively high remaining charge can drive the motor during the initial stage to enable the vehicle to start; once the vehicle speed reaches a constant level, if the intelligent power-saving mode is activated, the range extender can start driving the motor, and the battery can stop supplying power.

[0074] At this time, if the range extender's power is insufficient to meet the driving requirements (i.e., the range extender's power is less than the vehicle's required power), the battery with relatively high remaining power can be used to discharge and supplement the motor.

[0075] If the range extender's power meets the driving requirements (i.e., the range extender's power is greater than or equal to the vehicle's required power), the range extender's remaining power can be used to charge the battery with relatively low remaining charge until the battery's remaining charge reaches 90% (i.e., the second threshold). At this point, the charging target can be switched to another battery until the other battery's remaining charge also reaches 90%. Then, the vehicle's driving strategy can be switched between the first battery driving mode and the second battery driving mode.

[0076] In the second mode, the battery with a relatively high remaining charge can drive the motor during the initial acceleration phase to enable vehicle start-up. Once the vehicle speed reaches a constant level, if the intelligent power-saving mode is activated, the range extender can start driving the motor, and the battery can stop contributing to power supply.

[0077] If the range extender's power is insufficient for driving needs, the battery with relatively high remaining charge can be used to discharge and supplement the motor. If the range extender's power is sufficient for driving needs, the remaining power of the range extender can be used to charge the battery with relatively low remaining charge.

[0078] During this process, if the remaining charge of both batteries is greater than 20% after charging, the operation mode of the intelligent power preservation method is equivalent to switching to the first mode mentioned above; if the remaining charge of both batteries is less than or equal to 20% after discharging, the operation mode of the intelligent power preservation method is equivalent to switching to the third mode.

[0079] In the third mode, since the remaining charge of both batteries is less than or equal to 20%, the range extender can drive the vehicle for the entire time when the vehicle's intelligent power-saving mode is activated. That is, the range extender can be used to drive the motor to achieve vehicle start-up and stable driving.

[0080] At this time, if the vehicle's power demand increases, making the power demand greater than the range extender's power, the power difference can be made up by discharging the battery with relatively high remaining power. If the range extender has remaining power, that is, the range extender's power is greater than the vehicle's power demand, the range extender's remaining power can be used to charge the battery with low remaining power.

[0081] During this process, when one of the batteries has a remaining charge of more than 20% after charging, the intelligent power preservation method will switch to the second mode mentioned above. Conversely, when both batteries have a remaining charge of 5% after discharging (i.e., the third threshold), the vehicle's driving strategy can be switched to the power limiting mode to reduce the vehicle's power demand.

[0082] Understandably, by providing basic power through a low-power range extender, and combining it with dual battery packs to form dynamic power, and using an intelligent collaborative approach to jointly meet the vehicle's power demands, the performance of the powertrain system can be optimized.

[0083] Meanwhile, the intelligent control strategy based on the state of charge of the dual batteries can dynamically designate the discharging battery and the charging battery, thereby avoiding deep discharge of a single battery pack and balancing the state of charge of the dual batteries to a healthy high range during driving.

[0084] In addition, by dividing the entire SOC operating range into three basic modes and establishing the conversion logic for each basic mode, each mode corresponds to a different battery charge relationship, thereby achieving maximum protection of the battery and maximum utilization of energy.

[0085] Therefore, based on the above configuration, it not only helps to improve the power response capability of the power system, but also extends the cycle life of the power battery pack, slows down the battery capacity decay, optimizes battery health management, and enhances the driving experience.

[0086] Please see Figure 6 , Figure 6 This is a schematic block diagram of an intelligent power-saving control device provided in an embodiment of the present invention. The intelligent power-saving control device 100 includes an acquisition module 110, a determination module 120, and a drive module 130.

[0087] The acquisition module 110 is used to determine the current driving stage of the vehicle and acquire battery power status data; the determination module 120 is used to determine the driving strategy of the vehicle based on the current driving stage of the vehicle and the battery power status data; and the driving module 130 is used to drive the vehicle to start or drive according to the driving strategy of the vehicle.

[0088] The aforementioned driving strategy includes at least a battery-driven mode and a range extender-driven mode. The battery-driven mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender-driven mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

[0089] It should be noted that the aforementioned intelligent power-saving control device 100 can be implemented as a computer program, which can be used in various ways, such as... Figure 7 The range-extended vehicle 200 shown is running on the road.

[0090] Please see Figure 7 , Figure 7 This is a schematic block diagram of a range-extended vehicle provided in an embodiment of the present invention. The range-extended vehicle 200 may include a motor 210, a range extender 230, and multiple power batteries 220. The range extender 230 and each power battery 220 can drive the motor 210 to operate, thereby enabling the vehicle to travel.

[0091] In one embodiment, the range extender 230 can be a low-power range extender with a power output of less than or equal to 50kW. In this case, when the vehicle is in high-speed operation, the power output of the low-power range extender is usually insufficient to cover the power demand of the entire vehicle. Therefore, the battery can be used to drive the motor 210, or the range extender 230 can be used to drive the vehicle and the battery can be used for supplemental power.

[0092] Meanwhile, the range-extended vehicle 200 can be configured with a dual-battery architecture, that is, the aforementioned power battery 220 can be configured as two, which can be referred to as the first battery 221 and the second battery 222 respectively. The first battery 221 and the second battery 222 can use the same specification of power battery 220 or different specification of power battery 220, and there is no specific limitation on this.

[0093] At this point, taking the first battery 221 as an example, to optimize battery health management, a first threshold, a second threshold, and a third threshold can be set for the SOC of the first battery 221 through the battery management system (BMS). The first threshold is the protection threshold for the first battery 221 under normal discharge conditions; the second threshold can represent the recommended threshold for the high range of remaining charge in the first battery 221; and the third threshold can represent the threshold for the extremely low range of remaining charge in the first battery 221.

[0094] Understandably, the upper limit of the SOC of the first battery 221 during charging can be controlled at the aforementioned second threshold to avoid overcharging of the battery; while during normal discharge, the SOC of the first battery 221 is preferably not lower than the aforementioned first threshold to avoid a sudden drop in its discharge power and to delay battery aging; of course, under extreme conditions, the SOC of the first battery 221 during discharge should not be lower than the aforementioned third threshold to avoid over-discharge of the battery.

[0095] Based on this, regardless of whether the second battery 222 adopts a power battery 220 with the same or different specifications as the first battery 221, the same or different first threshold, second threshold and third threshold can be set for it in the manner described above.

[0096] For example, in one embodiment, the first battery 221 and the second battery 222 described above can use the same power battery 220. In this case, the first battery 221 and the second battery 222 can use the same first threshold, second threshold and third threshold; wherein, the first threshold can be 20% of the battery's rated capacity, the second threshold can be 90% of the battery's rated capacity, and the third threshold can be 5% of the battery's rated capacity.

[0097] Of course, in some other embodiments, the first threshold, second threshold and third threshold of the first battery 221 and the second battery 222 may also adopt other values, which can be determined according to the corresponding battery specifications and parameters, and are not specifically limited here.

[0098] Please see Figure 8 The extended-range vehicle 200 also includes an electronic device 240. Figure 8 This is a schematic block diagram of the electronic equipment 240 in the range-extended vehicle 200. The electronic equipment 240 can be a host computer or server (such as the vehicle control unit, VCU).

[0099] See Figure 8 The electronic device 240 includes a processor 242, a memory, and a network interface 245 connected via a device bus 241; wherein the memory may include a storage medium 243 and internal memory 244.

[0100] The storage medium 243 can store the operating system 2431 and the computer program 2432. When the computer program 2432 is executed, it enables the processor 242 to perform an intelligent power-saving control method.

[0101] The processor 242 provides computing and control capabilities to support the operation of the entire electronic device 240.

[0102] The internal memory 244 provides an environment for the computer program 2432 in the storage medium 243 to run. When the computer program 2432 is executed by the processor 242, the processor 242 can execute the intelligent power-saving control method.

[0103] The network interface 245 is used for network communication, such as providing data information transmission.

[0104] The processor 242 is used to run the computer program 2432 stored in the memory to implement the intelligent power protection control method disclosed in the embodiments of the present invention.

[0105] It will be understood by those skilled in the art that Figure 8 The embodiments of the electronic device 240 shown do not constitute a limitation on the specific configuration of the electronic device 240. In other embodiments, the electronic device 240 may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, in some embodiments, the electronic device 240 on the range-extended vehicle 200 may include only a memory and processor 242. In such embodiments, the structure and function of the memory and processor 242 are similar to those shown in the illustration. Figure 8 The embodiments shown are consistent and will not be repeated here.

[0106] It should be understood that, in this embodiment of the invention, the processor 242 may be a Central Processing Unit (CPU), or it may be other general-purpose processors 242, digital signal processors 242 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor 242 may be a microprocessor 242, or it may be any conventional processor 242, etc.

[0107] In another embodiment of the present invention, a computer-readable storage medium 243 is provided. This computer-readable storage medium 243 can be either a non-volatile or volatile computer-readable storage medium 243. The computer-readable storage medium 243 stores a computer program 2432, which, when executed by a processor 242, implements the intelligent power-saving control method disclosed in this embodiment of the present invention.

[0108] Those skilled in the art will readily understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0109] In the embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Units with the same function may be grouped into one unit. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, or may be electrical, mechanical, or other forms of connection.

[0110] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0111] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0112] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium 243. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium 243 and includes several instructions to cause an electronic device 240 (which may be a personal computer, a backend server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium 243 includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a magnetic disk, or an optical disk.

[0113] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A smart power-saving control method, characterized in that, Applied to range-extended vehicles, including: Determine the current driving stage of the vehicle and obtain battery power status data; The vehicle's driving strategy is determined based on the vehicle's current driving stage and battery charge status data. According to the driving strategy, the vehicle is driven to start or move; The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

2. The intelligent power-saving control method according to claim 1, characterized in that, The process of determining the vehicle's driving strategy based on the vehicle's current driving stage and battery charge status data includes: When the vehicle is in the starting phase and the charge of both the first battery and the second battery is less than or equal to a first threshold, the driving strategy of the vehicle is determined to be the range extender driving mode. When the vehicle is in the start-up phase and the charge of at least one of the first and second batteries is greater than a first threshold, the driving strategy of the vehicle is determined to be battery driving mode. When the vehicle is in a steady operating phase and the charge of at least one of the first and second batteries is less than a second threshold, the driving strategy of the vehicle is determined to be the range extender driving mode. When the vehicle is in a stable operating phase and the charge levels of both the first and second batteries are greater than or equal to the second threshold, the driving strategy of the vehicle is determined to be battery driving mode.

3. The intelligent power-saving control method according to claim 2, characterized in that, Determining that the vehicle's driving strategy is battery-driven mode includes: Compare and determine the relationship between the remaining charge of the first and second batteries; Based on the relationship between the remaining charge of the first battery and the second battery, the battery with the relatively higher remaining charge is used to drive the vehicle.

4. The intelligent power-saving control method according to claim 1, characterized in that, The step of setting the operating states of the first and second batteries based on the relative relationship between the power of the range extender and the power demand of the vehicle includes: When the power of the range extender is greater than the power required by the vehicle, the remaining power of the range extender is used to charge the first battery or the second battery. When the power of the range extender is less than the power required by the vehicle, it is supplemented by discharging using the first battery or the second battery.

5. The intelligent power-saving control method according to claim 4, characterized in that, When the power of the range extender exceeds the vehicle's required power, the remaining power of the range extender is used to charge the first or second battery, including: Compare and determine the relationship between the remaining charge of the first and second batteries; The order in which the first and second batteries are charged is determined based on the relationship between the remaining charge levels of the first and second batteries. According to the aforementioned order, the two batteries are charged sequentially until both batteries reach the second threshold level.

6. The intelligent power-saving control method according to claim 4, characterized in that, When the power of the range extender is less than the vehicle's required power, the motor is discharged using either the first battery or the second battery to compensate for the power loss, including: Compare and determine the relationship between the charge levels of the first and second batteries; Based on the relationship between the charge levels of the first and second batteries, determine the order in which the first and second batteries discharge. According to the aforementioned sequence, the two batteries are discharged and replenished sequentially until the charge of both batteries reaches the third threshold.

7. The intelligent power-saving control method according to claim 1, characterized in that, The method of determining the vehicle's driving strategy based on the vehicle's current driving stage and battery charge status data also includes: When the charge levels of both the first and second batteries are less than or equal to a third threshold, the vehicle's driving strategy is determined to be range extender driving mode, and the vehicle is controlled to enter a power-limited mode.

8. An intelligent power-saving control device, characterized in that, Applied to range-extended vehicles, including: The acquisition module is used to determine the current driving stage of the vehicle and acquire battery power status data; The determination module is used to determine the vehicle's driving strategy based on the vehicle's current driving stage and battery power status data. A drive module is used to drive the vehicle to start or move according to the drive strategy. The driving strategy includes at least a battery driving mode and a range extender driving mode. The battery driving mode is a mode in which the vehicle is driven by a first battery and / or a second battery. The range extender driving mode is a mode in which the vehicle is driven by a range extender, and the operating states of the first battery and the second battery are set according to the relative relationship between the power of the range extender and the power demand of the vehicle.

9. A range-extended vehicle, characterized in that, include: Processor and memory; The memory stores computer programs that can be executed by the processor; When the processor executes the computer program, it implements the steps in the intelligent power-saving control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the intelligent power-saving control method as described in any one of claims 1-7.

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