Hybrid system control method, engineering device, and machine-readable storage medium

Abstract

The application discloses a hybrid power system control method, engineering equipment and a machine readable storage medium, and relates to the technical field of hybrid power. The method comprises the following steps: detecting the whole vehicle demand power of a target device and the working condition of the target device, and acquiring the state of charge value of the power battery of the target device, so as to lay a foundation for subsequent intelligent decision-making; based on the working condition and the state of charge value, a corresponding target control strategy is matched from a preset control strategy set, so that the system can flexibly adapt to various task requirements from transfer travel to heavy load operation; based on the whole vehicle demand power, a target power point is determined from all candidate power points, so that the precise and optimized positioning of the range extender working point is realized; the range extender of the target device is controlled to operate according to the target power point, and the power battery is coordinately controlled, so that the sum of the output power of the range extender and the charging and discharging power of the power battery matches the whole vehicle demand power, and the overall energy efficiency of the system is improved on the premise of ensuring the power.

Description

Technical Field

[0001] This application relates to the field of hybrid power technology, and more specifically to a hybrid power system control method, engineering equipment, and machine-readable storage medium. Background Technology

[0002] In the field of hybrid powertrain for construction machinery, range-extended electric vehicles (REEVs) have become an important development direction due to their ability to effectively alleviate range anxiety associated with pure electric vehicles. Currently, energy management strategies for equipment such as range-extended cranes largely draw inspiration from passenger car platforms, employing a single threshold control method based on instantaneous power demand and battery state of charge. However, cranes exhibit distinctly different operating characteristics compared to passenger cars: their work cycles can be clearly distinguished into two distinct load characteristics: travel and relocation, and stationary operation. Power demand during travel fluctuates significantly and is periodic; while power demand during operation is relatively stable but experiences sustained high peak values. Existing control strategies fail to fully consider the inherent characteristics of these two typical operating conditions, using the same set of parameters and control logic for management. This results in the range extender system frequently deviating from its high-efficiency zone during actual operation, leading to persistently high overall system energy consumption and failing to fully realize the energy-saving potential of hybrid powertrains. Therefore, there is an urgent need in this field for a high-efficiency energy management method that deeply aligns with the multi-condition operating characteristics of cranes. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this application is to provide a hybrid power system control method, engineering equipment and machine-readable storage medium.

[0004] To achieve the above objectives, the first aspect of this application provides a hybrid power system control method, comprising: The system detects the vehicle's required power and operating conditions of the target equipment, and obtains the state of charge (SOC) value of the target equipment's power battery. Based on the operating conditions and state of charge values, a corresponding target control strategy is matched from a set of preset control strategies. The target control strategy includes a set of candidate power points for the range extender. Based on the vehicle's required power, the target power point is determined from all candidate power points; The range extender of the target device is controlled according to the target power point, and the power battery is coordinated and controlled so that the output power of the range extender and the sum of the charging and discharging power of the power battery match the power requirements of the vehicle.

[0005] In this embodiment of the application, the operating conditions include driving conditions and work conditions. The preset control strategy set includes a first control strategy set and a second control strategy set. Based on the operating conditions and state of charge values, a corresponding target control strategy is matched from the predefined control strategy set, including: When the operating condition is driving, the target control strategy is matched in the first control strategy set based on the state of charge value. When the operating condition is the working condition, the corresponding target control strategy is matched in the second control strategy set based on the state of charge value.

[0006] In this embodiment of the application, based on the state of charge value, a corresponding target control strategy is matched in the first control strategy set, including: The state of charge value is matched with multiple preset driving state of charge intervals to determine the target driving state of charge interval. Based on the target driving charge state range, the corresponding target control strategy is determined from the first control strategy set.

[0007] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target driving state of charge range is the first charge range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero; When the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is compared with the first power threshold. If the total power demand of the vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0008] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target driving state of charge range is the second energy range, the vehicle's required power is compared with the first power threshold, wherein the second energy range is numerically lower than the first energy range. If the total power demand of the vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0009] In this embodiment of the application, the multiple first driving power ranges are divided based on multiple range upper limits, wherein the upper limit of each range is the sum of a candidate power point and the sustainable discharge power of the power battery; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the first driving power range corresponding to the matching results.

[0010] In this embodiment of the application, the plurality of first driving power ranges include a first limit power range; When the power demand of the whole vehicle is matched to the first limit power range, the rated power point of the range extender is determined as the target power point.

[0011] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target driving state of charge range is the third energy range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. The third energy range is numerically lower than the second energy range. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined as the sustainable discharge power. When the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is matched with multiple second driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0012] In this embodiment of the application, the boundary values ​​of the multiple second driving power ranges are defined based on each candidate power point; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the second driving power range corresponding to the matching results.

[0013] In this embodiment of the application, the plurality of second driving power ranges include a second limit power range; When the power demand of the whole vehicle is matched to the second limit power range, the rated power point of the range extender is determined as the target power point.

[0014] In this embodiment of the application, based on the state of charge value, a corresponding target control strategy is matched in the second control strategy set, including: The state of charge value is matched with multiple preset state of charge thresholds for operating conditions to determine the target state of charge range. Based on the target operating state of charge range, select the corresponding target control strategy from the second control strategy set.

[0015] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target operating state of charge range is the fourth charge range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero; When the power demand of the vehicle exceeds the sustainable discharge power, the target power point is determined as the second predetermined power point. The second predetermined power point is determined based on the average power demand under typical operating conditions and the efficiency characteristics of the range extender.

[0016] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target operating state of charge range is the fifth energy range, the vehicle's required power is compared with the second predetermined power point, wherein the fifth energy range is numerically lower than the fourth energy range. If the power demand of the whole vehicle is not greater than the second predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the second predetermined power point, the target power point is determined as the third predetermined power point. The third predetermined power point is the power point among all candidate power points that is greater than the second predetermined power point and ensures that there is still surplus power to charge the power battery after the required power of the vehicle is met.

[0017] In this embodiment of the application, the target power point is determined from all candidate power points based on the vehicle's required power, including: When the target operating state of charge range is the sixth energy range, the required power of the whole vehicle is compared with the fourth predetermined power point, wherein the fourth predetermined power point is less than the second predetermined power point, and the sixth energy range is numerically lower than the fifth energy range. If the power demand of the whole vehicle is not greater than the fourth predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the fourth predetermined power point, the target power point is determined as the third predetermined power point.

[0018] In this embodiment of the application, after the step of controlling the operation of the range extender, the following is also included: Continuously monitor the power demand of the entire vehicle; The target power point is redefined if a change in the vehicle's required power is detected and one of the following conditions is met: The vehicle's required power output remains below the first exit threshold for a specified duration; or The vehicle's power demand continues to exceed the second exit threshold and reaches the second preset duration; The settings of the first exit threshold and the second exit threshold are both related to the current target power point and the preset switching buffer value.

[0019] In this embodiment of the application, after the step of controlling the operation of the range extender, the following is also included: The state of charge of the power battery is continuously monitored when the range extender is operating at a non-zero target power point. If the state of charge value is detected to rise to a level not lower than the preset target state of charge threshold, the current target control strategy is exited, and the step of matching the corresponding target control strategy from the preset control strategy set based on the operating conditions and state of charge value is re-executed.

[0020] A second aspect of this application provides an engineering device, comprising: Hybrid power system, including range extender and power battery; The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the hybrid power system control method as described in the above embodiments.

[0021] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the hybrid power system control method as described in the above embodiments.

[0022] The above technical solution detects the vehicle's required power and operating conditions of the target equipment, and obtains the state of charge (SOC) value of the target equipment's power battery, laying the foundation for subsequent intelligent decision-making. Based on the operating conditions and SOC value, the corresponding target control strategy is matched from a preset control strategy set, enabling the system to flexibly adapt to various task requirements, from field transfers to heavy-duty operations. Based on the vehicle's required power, the target power point is determined from all candidate power points, achieving precise and optimized positioning of the range extender's operating point. The range extender of the target equipment is controlled according to the target power point, and the power battery is coordinated and controlled so that the sum of the range extender's output power and the power battery's charging and discharging power matches the vehicle's required power, improving the overall energy efficiency of the system while ensuring power performance.

[0023] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1 The illustration shows a schematic flowchart of a hybrid power system control method according to an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with relevant laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0027] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] Figure 1 A schematic flowchart illustrating a hybrid power system control method according to an embodiment of this application is shown. Figure 1 As shown in the figure, this application provides a hybrid power system control method, which may include the following steps: Step 100: Detect the vehicle's required power and operating conditions of the target device, and obtain the state of charge value of the target device's power battery. In this embodiment, it should be noted that the total power demand of the vehicle refers to the total electrical power requested by the engineering equipment from the power system to complete the current driving or working action. This value is calculated by the vehicle controller based on sensor inputs such as accelerator pedal opening and working handle signals. For example, when the equipment is driving, this includes the power demand of the driving motor and the power demand of the electrical accessories. Operating condition identification is key to distinguishing the operating modes of the engineering equipment. For example, by judging whether the vehicle speed exceeds a set threshold or whether the power source of the working mechanism is activated, the operating condition can be divided into driving and working conditions. The state of charge (SCC) value of the power battery is a percentage value provided by the battery management system, reflecting the current remaining battery charge. By synchronously acquiring these three interrelated state quantities, a comprehensive judgment of the current energy supply and demand situation can be made, thus laying the foundation for subsequent intelligent decision-making and ultimately ensuring the accuracy and real-time performance of the control strategy.

[0030] Step 200: Based on the operating conditions and state of charge values, match the corresponding target control strategy from the preset control strategy set, wherein the target control strategy includes a set of candidate power points for the range extender; In this embodiment, by implementing a refined and adaptive control strategy, the use of a single, rigid control logic to cope with complex and ever-changing real-world scenarios is avoided. It should be noted that, based on the identified specific operating conditions and state of charge values, the most suitable target control strategy for the current situation is queried and matched from a pre-set set of control strategies. This pre-set set of control strategies is a database optimized through extensive simulation and experimental calibration. Its construction is based on in-depth analysis of the power statistical characteristics of two typical operating conditions of crane travel and operation, as well as the system optimization objectives under different power levels. For example, for the travel condition, multiple strategy subsets may be pre-set, corresponding to different state of charge ranges such as high power, medium power, and low power; similarly, the operation condition also has its own independent strategy subset. A set of candidate power points for the range extender included in the target control strategy is the core feature of this embodiment. These candidate power points are selected based on the universal efficiency characteristic diagram of the range extender assembly, aiming to enable the range extender to operate stably at several discrete operating points with high power generation efficiency. This strategy matching mechanism, which differentiates between operating conditions and power ranges, enables the control system to flexibly adapt to various task requirements, from field transfers to heavy-load operations, thus providing key strategic guidance for achieving optimal overall system efficiency.

[0031] Step 300: Based on the vehicle's required power, determine the target power point from all candidate power points; It should be noted that in this embodiment, based on the real-time changing power demand of the vehicle, an optimal target power point is selected from the candidate power points included in the determined target control strategy. The specific implementation varies depending on the strategy. For example, in the high-battery range of driving conditions, if the power demand can be met by the battery alone, the target power point is zero, meaning the range extender does not start. If the power demand exceeds the battery's capacity but is within a moderate range, a high-efficiency point close to the average driving power demand may be selected as the target. If the power demand further increases, interval matching logic may be activated, i.e., determining which preset power interval the power demand falls into and selecting the candidate power point with the highest efficiency corresponding to that interval. Under operating conditions, the strategy may be simpler, for example, directly selecting a fixed high-efficiency point pre-calibrated based on typical operating power in most cases. This step, through a dynamic power point selection algorithm, ensures that under any power demand, the system prioritizes the range extender's operation in the high-efficiency region. Its direct effect is to achieve precise and optimized positioning of the range extender's operating point, providing a core guarantee for reducing energy consumption.

[0032] Step 400: Control the range extender of the target device to operate according to the target power point, and coordinate the control of the power battery so that the output power of the range extender and the sum of the charging and discharging power of the power battery match the power demand of the vehicle.

[0033] In this embodiment, after determining the target power point, control commands are generated based on this target power point to drive the range extender, stabilizing its output power at the target value. Simultaneously, the operating state of the power battery is coordinated and controlled. Since the range extender operates at a fixed power point, while the vehicle's power demand fluctuates, the real-time power difference between the two needs to be compensated by the power battery. Specifically, when the range extender's output power exceeds the vehicle's power demand, the excess energy is absorbed and stored by the power battery, i.e., the battery is in a charging state; when the range extender's output power is insufficient to meet the vehicle's demand, the insufficient power is supplemented by the power battery discharging. This coordinated control mode, where the range extender operates at a fixed point and the power battery is responsible for "peak shaving and valley filling," is the key execution mechanism enabling the entire method to achieve high efficiency and energy saving. This allows the slower-responding range extender to continuously operate in a high-efficiency condition, while the fast-responding power battery smooths out power fluctuations, ultimately enabling the output power of the entire hybrid system to achieve dynamic balance with the changing power demand of the engineering equipment, thereby improving the overall energy efficiency of the system while ensuring power performance.

[0034] In this embodiment, by detecting the vehicle's required power and operating conditions of the target device, and obtaining the state of charge (SOC) value of the target device's power battery, a foundation is laid for subsequent intelligent decision-making. Based on the operating conditions and SOC value, a corresponding target control strategy is matched from a preset control strategy set, enabling the system to flexibly adapt to various task requirements, from field transfers to heavy-duty operations. Based on the vehicle's required power, a target power point is determined from all candidate power points, achieving precise and optimized positioning of the range extender's operating point. The range extender of the target device is controlled according to the target power point, and the power battery is coordinated and controlled so that the sum of the range extender's output power and the power battery's charging and discharging power matches the vehicle's required power, thereby improving the overall energy efficiency of the system while ensuring power performance.

[0035] In one embodiment, the operating conditions include driving conditions and work conditions, and the preset control strategy set includes a first control strategy set and a second control strategy set. Based on the operating conditions and state of charge values, a corresponding target control strategy is matched from the predefined control strategy set, including: When the operating condition is driving, the target control strategy is matched in the first control strategy set based on the state of charge value. When the operating condition is the working condition, the corresponding target control strategy is matched in the second control strategy set based on the state of charge value.

[0036] It should be noted that condition-specific strategy matching is key to improving control targeting. In this embodiment, a first control strategy set and a second control strategy set are preset, corresponding to driving and working conditions respectively. When the engineering equipment is detected to be in driving condition, the controller will query and match the first control strategy set, which is specifically optimized for driving characteristics, based on the current state of charge value. Conversely, when working condition is detected, the controller will switch to the second control strategy set for matching.

[0037] In this embodiment, based on the essential differences between the two operating conditions in terms of power demand patterns, duration, and system optimization objectives, a strategy library is configured independently for each operating condition, avoiding mutual compromise of control logic. This lays a solid foundation for implementing energy management that best suits the characteristics of the current task.

[0038] In one embodiment, matching a corresponding target control strategy based on the state of charge value in a first set of control strategies includes: The state of charge value is matched with multiple preset driving state of charge intervals to determine the target driving state of charge interval. Based on the target driving charge state range, the corresponding target control strategy is determined from the first control strategy set.

[0039] It should be noted that finely dividing the driving condition strategy is a crucial step in achieving efficient energy management. In this embodiment, within the first control strategy set, multiple driving state of charge (SOC) intervals are further divided based on the SOC value. For example, SOC ≥ 40% is the first energy interval, 40% > SOC ≥ 20% is the second energy interval, and SOC < 20% is the third energy interval. The controller determines the specific target interval by comparing the real-time SOC value with preset interval thresholds, and then calls the control strategy bound to that target interval from the first control strategy set.

[0040] In this embodiment, multi-mode management based on power level enables the system to dynamically adjust and optimize objectives according to energy reserves. For example, it prioritizes power consumption when power is high and prioritizes power preservation when power is low, thereby achieving refined and adaptive control of the energy status of engineering equipment.

[0041] In one embodiment, determining the target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the first charge range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero; When the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is compared with the first power threshold. If the total power demand of the vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0042] In this embodiment, it should be noted that when the target driving state of charge range is the first charge range, it indicates that the power battery has sufficient charge. Power management in the first charge range aims to prioritize the use of battery energy to achieve energy conservation and environmental protection. In this embodiment, if the power demand of the vehicle does not exceed the sustainable discharge capacity of the power battery, the target power point is set to zero, that is, the range extender does not start, and the engineering equipment is driven entirely by the power battery to achieve zero-emission driving. For example, when a crane is traveling at low speed on a flat road, the power demand is low, and the battery can supply power alone.

[0043] If the vehicle's power demand exceeds the battery's capacity, a first power threshold is introduced for judgment. This first power threshold is the sum of a first predetermined power point and the battery's sustainable discharge power. The first predetermined power point is determined based on the average power demand under typical driving conditions and the efficiency characteristics of the range extender. Specifically, it can be determined based on the average power demand obtained from a large amount of driving data statistics, combined with the range extender's most efficient region. If the vehicle's power demand does not exceed the first power threshold, the range extender is controlled to operate stably at the first predetermined power point, and the power battery compensates for the difference. If the vehicle's power demand is greater than the first power threshold, the demanded power is matched with multiple first driving power ranges, and the corresponding target power point is selected.

[0044] In this embodiment, the range extender can be kept at its high efficiency point in most low-to-medium load driving scenarios, with the battery handling fluctuations, thus balancing energy efficiency and smoothness.

[0045] Specifically, in one embodiment, determining a target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the second energy range, the vehicle's required power is compared with the first power threshold, wherein the second energy range is numerically lower than the first energy range. If the total power demand of the vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0046] In this embodiment, it should be noted that the target driving state of charge range is the second charge range, indicating that the power battery's charge level is at a moderate level. The core management focus at this time is maintaining system efficiency and protecting the battery charge. The strategy in this embodiment is consistent with the high charge range, also using a first power threshold as the decision branch point. When the vehicle's power demand is not greater than the first power threshold, the first predetermined power point is still selected as the target, allowing the range extender to operate efficiently and the battery to perform peak shaving and valley filling. Its special feature is that, since the power battery's charge has been depleted to a moderate level, the power battery's role in this mode is more focused on power buffering, and it may charge when the range extender has surplus output. When the vehicle's power demand exceeds the first power threshold, the vehicle's power demand is matched with multiple first driving power ranges. Based on the matching results, the target power point is selected from the candidate power points. If the power demand is extremely high, the range extender outputs at a higher efficiency power point.

[0047] In this embodiment, it is ensured that the system can still operate in a high-efficiency state when the power starts to be low, while creating conditions for the slow recovery of the power.

[0048] In one embodiment, the multiple first driving power ranges are divided based on multiple range upper limits, wherein each range upper limit is the sum of a candidate power point and the sustainable discharge power of the power battery; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the first driving power range corresponding to the matching results.

[0049] It should be noted that a clearly defined power range matching principle is the foundation for achieving dynamic and efficient power allocation. This embodiment details the construction method of the first driving power range, where the upper limit of each first driving power range is formed by adding a candidate power point to the sustainable discharge power of the power battery. This definition intuitively reflects the boundary of the combined power capability provided by the "range extender's fixed-point output and the battery's maximum discharge". For example, if the candidate power points are 20kW, 30kW, and 40kW, and the sustainable discharge power is 50kW, then the upper limits of the ranges are 70kW, 80kW, and 90kW, respectively, corresponding to the ranges (50kW, 70kW], (70kW, 80kW], and (80kW, 90kW). During matching, the system selects the candidate power point with the highest power generation efficiency among all candidate power points that can cover the current demand range as the target. For example, if the demand power is 75kW, falling within the (70kW, 80kW] range, the candidate power point 30kW in this range has the highest efficiency and is therefore determined as the target power point.

[0050] In this embodiment, it is ensured that when the required power increases, the system can automatically switch to the relatively most efficient range extender operating point step by step while meeting the power requirements. This is an important logical guarantee for maximizing system efficiency.

[0051] In one embodiment, the plurality of first driving power ranges include a first limit power range; When the power demand of the whole vehicle is matched to the first limit power range, the rated power point of the range extender is determined as the target power point.

[0052] In this embodiment, it should be noted that setting a power limit management system is a necessary safety measure to ensure the power performance of the engineering equipment. This embodiment defines a first power limit range representing the extremely high range of the vehicle's required power. When the real-time monitored value of the vehicle's required power falls within this first power limit range, the control system will transcend the conventional efficiency-first principle and directly determine the range extender's rated power point as the target power point. In one embodiment, the maximum power point of the range extender can also be directly determined as the target power point. Entering the first power limit range indicates that the system has entered a full-power output state, designed to work in conjunction with the power battery to meet peak power demands under extreme conditions, such as rapid acceleration or steep inclines. The upper limit of the first power limit range can be based on the sum of the maximum power of the driving motor and the power of the electric accessories under driving conditions, representing the maximum limit of the vehicle's required power. It is understood that if the rated power of the range extender cannot match the vehicle's required power when the vehicle's required power is matched to the first power limit range, the power battery will supplement the power output.

[0053] This embodiment ensures the completeness of the control strategy under boundary conditions, enabling the engineering equipment to achieve its maximum power potential under any circumstances.

[0054] In one embodiment, determining the target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the third energy range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. The third energy range is numerically lower than the second energy range. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined as the sustainable discharge power. When the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is matched with multiple second driving power ranges, and the corresponding target power point is determined from all candidate power points based on the matching results.

[0055] It should be noted that when the target driving state of charge range is the third charge range, it indicates that the battery charge is low. The highest priority management strategy for the low charge range is to protect the battery and replenish its charge. In this embodiment, if the vehicle's required power is less than or equal to the battery's sustainable discharge power, the system determines the target power point as this sustainable discharge power value. This means that the range extender is controlled to output a power sufficient to cover the current engineering equipment requirements and charge the battery, achieving driving charging without exceeding the battery charging power. If the vehicle's required power is greater, it enters the second driving power range for matching.

[0056] In this embodiment, by actively increasing the output power of the range extender when the battery is low, the battery is forcibly charged, thereby quickly getting the system out of the low-battery risk state and ensuring the system's continuous operation and battery health.

[0057] In one embodiment, the boundary values ​​of the multiple second driving power ranges are defined based on each candidate power point; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the second driving power range corresponding to the matching results.

[0058] It should be noted that in this embodiment, the second driving power range is directly defined by the values ​​of each candidate power point as the boundary. For example, if the candidate power points are 15kW, 25kW, and 35kW, the corresponding range boundaries are 15kW, 25kW, and 35kW. This contrasts sharply with the range definition method of "power point plus battery power" used when the battery is at medium to high charge levels, reflecting the shift in strategy under low charge mode: at this time, the battery is no longer the primary power output source, so the range division is based solely on the range extender's own capabilities. During matching, the principle of highest efficiency is also followed when selecting candidate power points. For example, if the vehicle's required power is 20kW, falling within the range of (15kW, 25kW), the 25kW candidate power point within this range has the highest efficiency and is therefore selected as the target power point.

[0059] In this embodiment, it is ensured that the range extender can still work as efficiently as possible within its own capabilities when there is low power and high demand, and prioritize meeting the driving needs of engineering equipment.

[0060] In one embodiment, the plurality of second driving power ranges include a second limit power range; When the power demand of the whole vehicle is matched to the second limit power range, the rated power point of the range extender is determined as the target power point.

[0061] It should be noted that setting a limit power management range in the low battery range is a key guarantee to ensure that the power system can still cope with extreme demands when energy is scarce. In this embodiment, a second limit power range is included within the second driving power range specifically defined for low battery conditions. When sustained high power demand causes the vehicle's power requirement to fall into this second limit power range, the control system will transcend the conventional efficiency-first principle and directly determine the range extender's rated power point or maximum power point as the target power point. This means that even if the power battery is low on charge, when engineering equipment faces situations such as emergency escape or extreme hill climbing, the system will instruct the range extender to output power at its maximum capacity, in conjunction with the last possible reserve power provided by the power battery, to jointly meet the driving demand.

[0062] This embodiment ensures that the peak power performance of the vehicle can still be maintained to the greatest extent even at the lowest battery level, thereby guaranteeing the safety and passability of engineering equipment in emergency situations.

[0063] In one embodiment, matching a corresponding target control strategy to a second set of control strategies based on the state of charge value includes: The state of charge value is matched with multiple preset state of charge thresholds for operating conditions to determine the target state of charge range. Based on the target operating state of charge range, select the corresponding target control strategy from the second control strategy set.

[0064] It should be noted that the detailed strategy for each operating condition is crucial for ensuring continuous and stable operational performance. Similar to the travel operating condition, this embodiment pre-defines multiple state-of-charge (POC) intervals for the operating condition. By comparing real-time POC values ​​with the POC threshold specific to the operating condition, the target POC interval is determined, and then the corresponding control strategy is selected from the second control strategy set. The power demand pattern of the operating condition differs significantly from that of the travel operating condition; its threshold settings and strategy content are designed independently. This ensures that the energy management system can provide matching and stable power support during crane lifting, slewing, and other operations.

[0065] In one embodiment, determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the fourth charge range, the power demand of the vehicle is compared with the sustainable discharge power of the power battery. When the power demand of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero; When the power demand of the vehicle exceeds the sustainable discharge power, the target power point is determined as the second predetermined power point. The second predetermined power point is determined based on the average power demand under typical operating conditions and the efficiency characteristics of the range extender.

[0066] It should be noted that the target operating state of charge range is the fourth charge range, indicating that the power battery has sufficient charge. In this case, clean battery energy is used preferentially. In this embodiment, if the power required for the operation can be handled solely by the power battery, the target power point is set to zero, achieving silent operation. For example, when lifting light objects, the power battery can provide sufficient power. If the required power exceeds the power battery's capacity, complex range judgments are no longer performed; instead, a fixed second predetermined power point is directly determined as the target. This second predetermined power point is determined based on the average power requirement of typical operating actions and the high-efficiency range of the range extender, ensuring efficient operation of the range extender.

[0067] In this embodiment, the strategy of keeping the range extender stable at a fixed point is very suitable for the characteristics of relatively concentrated power demand in operating conditions. It can reduce range extender fluctuations, improve operating smoothness, and ensure efficient power generation.

[0068] In one embodiment, determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the fifth energy range, the vehicle's required power is compared with the second predetermined power point, wherein the fifth energy range is numerically lower than the fourth energy range. If the power demand of the whole vehicle is not greater than the second predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the second predetermined power point, the target power point is determined as the third predetermined power point. The third predetermined power point is the power point among all candidate power points that is greater than the second predetermined power point and ensures that there is still surplus power to charge the power battery after the required power of the vehicle is met.

[0069] It should be noted that when the target operating state of charge range is the fifth charge range, it indicates that the power battery has a moderate charge level, and both operational needs and charge recovery must be considered during operation. In this embodiment, the system compares the required power with a second predetermined power point. If the vehicle's required power is low, the target power point is set to the battery's sustainable discharge power. This aims to utilize smaller operational load intervals to charge the power battery at the maximum safe power. If the vehicle's required power is high, a third predetermined power point is selected. This third predetermined power point is specifically defined as not only being greater than the second predetermined power point, but also having a surplus of output power available for charging after meeting the current operational needs.

[0070] In this embodiment, by actively creating charging conditions, it is ensured that the system power can be maintained or slowly recovered when performing high-intensity operations with moderate power levels.

[0071] In one embodiment, determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the sixth energy range, the required power of the whole vehicle is compared with the fourth predetermined power point, wherein the fourth predetermined power point is less than the second predetermined power point, and the sixth energy range is numerically lower than the fifth energy range. If the power demand of the whole vehicle is not greater than the fourth predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the fourth predetermined power point, the target power point is determined as the third predetermined power point.

[0072] It should be noted that when the target operating state of charge range is the sixth charge range, it indicates that the power battery charge is low, and a more aggressive charging strategy is adopted when operating with low charge. This embodiment introduces a fourth predetermined power point, lower than the second predetermined power point, as a judgment threshold. When the vehicle's power demand is lower than this threshold during operation, even if the demand is small, the system commands the range extender to output the battery's sustainable discharge power to achieve fast charging. When the vehicle's power demand is higher than this threshold, it connects with the medium charge strategy and switches to the third predetermined power point, which can provide greater power and charging capacity.

[0073] In this implementation, a more aggressive triggering mechanism is adopted, which enables the system to seize every opportunity to increase power when the battery is extremely low, thereby enhancing the system's endurance and reliability under continuous operation conditions.

[0074] In one embodiment, after the step of controlling the operation of the range extender, the method further includes: Continuously monitor the power demand of the entire vehicle; The target power point is redefined if a change in the vehicle's required power is detected and one of the following conditions is met: The vehicle's required power output remains below the first exit threshold for a specified duration; or The vehicle's power demand continues to exceed the second exit threshold and reaches the second preset duration; The settings of the first exit threshold and the second exit threshold are both related to the current target power point and the preset switching buffer value.

[0075] It should be noted that continuous monitoring of power demand changes is a crucial mechanism for achieving dynamic response. The switching buffer value is a key parameter in control engineering used to prevent frequent system oscillations near the setpoint; its function is to establish a "hysteresis interval" or "dead zone" for state transitions. In this embodiment, after the range extender starts operating, the vehicle's power demand is continuously monitored. When the vehicle's power demand remains below a first exit threshold determined jointly by the current target power point and the relevant switching buffer value for a certain period, the system will trigger a re-determination of the target power point, potentially leading to range extender degradation or shutdown. Conversely, when the power demand remains above a second exit threshold for a certain period, an upgrade will be triggered. It is understood that the first and second preset durations can be equal or unequal; the specific settings can be determined based on the actual application. The introduction of the switching buffer value creates a buffer zone between the current stable operating point and the boundary triggering the switch.

[0076] In this embodiment, the mechanism with hysteresis and delay judgment can effectively filter out instantaneous fluctuations in demand, prevent frequent jumps in the operating point of the range extender, and ensure the stability of the system and the lifespan of the components.

[0077] In one embodiment, after the step of controlling the operation of the range extender, the method further includes: The state of charge of the power battery is continuously monitored when the range extender is operating at a non-zero target power point. If the state of charge value is detected to rise to a level not lower than the preset target state of charge threshold, the current target control strategy is exited, and the step of matching the corresponding target control strategy from the preset control strategy set based on the operating conditions and state of charge value is re-executed.

[0078] It should be noted that using state of charge (SOC) recovery as a mode switching condition is crucial for achieving a closed-loop energy management system. In this embodiment, when the range extender operates at a non-zero power point due to power preservation requirements, the system continuously monitors the SOC value of the power battery. Once the SOC value recovers to a level not lower than the target SOC threshold preset for the current mode, the system immediately exits the current power preservation or charging mode and restarts execution from the strategy matching stage. This marks the completion of one power preservation cycle.

[0079] In this embodiment, the low power control strategy is ensured not to be over-executed. Once the power level is restored to a safe level, the system automatically returns to the more economical and efficiency-focused conventional mode, thereby achieving intelligent and smooth transition between different energy state modes.

[0080] This application also provides an engineering device, including: Hybrid power system, including range extender and power battery; The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the hybrid power system control method as described in the above embodiments.

[0081] This application also provides a machine-readable storage medium storing instructions that cause a machine to perform the hybrid power system control method as described in the above embodiments.

[0082] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0084] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0086] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0087] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0088] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0089] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0090] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a hybrid power system, characterized in that, include: The system detects the vehicle's required power and operating conditions of the target device, and obtains the state of charge (SOC) value of the target device's power battery. Based on the operating conditions and the state of charge value, a corresponding target control strategy is matched from a preset control strategy set, wherein the target control strategy includes a set of candidate power points for the range extender; Based on the required power of the vehicle, a target power point is determined from all the candidate power points; The range extender of the target device is controlled to operate according to the target power point, and the power battery is coordinated and controlled so that the sum of the output power of the range extender and the charging and discharging power of the power battery matches the power demand of the whole vehicle. The operating conditions include driving conditions and work conditions; the preset control strategy set includes a first control strategy set and a second control strategy set; and the matching of a corresponding target control strategy from the predefined control strategy set based on the operating conditions and the state of charge value includes: When the operating condition is driving, a corresponding target control strategy is matched in the first control strategy set based on the state of charge value. When the operating condition is a working condition, a corresponding target control strategy is matched in the second control strategy set based on the state of charge value; The step of matching a corresponding target control strategy in the first control strategy set based on the state of charge value includes: The state of charge value is matched with multiple preset driving state of charge intervals to determine the target driving state of charge interval. Based on the target driving charge state range, a corresponding target control strategy is determined from the first control strategy set; The step of matching a corresponding target control strategy in the second control strategy set based on the state of charge value includes: The state of charge value is matched with multiple preset state of charge thresholds for operating conditions to determine the target state of charge range for operating conditions. Based on the target operating state of charge range, a corresponding target control strategy is selected from the second control strategy set.

2. The hybrid power system control method according to claim 1, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the first charge range, the required power of the vehicle is compared with the sustainable discharge power of the power battery; If the required power of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero. If the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is compared with a first power threshold. If the required power of the whole vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all the candidate power points according to the matching results.

3. The hybrid power system control method according to claim 1, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the second energy range, the vehicle power demand is compared with the first power threshold, wherein the second energy range is numerically lower than the first energy range; If the required power of the whole vehicle is not greater than the first power threshold, the target power point is determined as the first predetermined power point; If the required power of the vehicle is greater than the first power threshold, the required power of the vehicle is matched with multiple first driving power ranges, and the corresponding target power point is determined from all the candidate power points according to the matching results.

4. The hybrid power system control method according to claim 2 or 3, characterized in that, The plurality of first driving power ranges are divided based on a plurality of range upper limits, wherein each range upper limit is the sum of a candidate power point and the sustainable discharge power of the power battery; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the first driving power range corresponding to the matching results.

5. The hybrid power system control method according to claim 4, characterized in that, The plurality of first driving power ranges includes a first extreme power range; When the required power of the whole vehicle is matched to the first limit power range, the rated power point of the range extender is determined as the target power point.

6. The hybrid power system control method according to claim 1, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target driving state of charge range is the third energy range, the required power of the vehicle is compared with the sustainable discharge power of the power battery, wherein the third energy range is numerically lower than the second energy range. If the required power of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be the sustainable discharge power. When the required power of the vehicle is greater than the sustainable discharge power, the required power of the vehicle is matched with multiple second driving power ranges, and the corresponding target power point is determined from all the candidate power points according to the matching results.

7. The hybrid power system control method according to claim 6, characterized in that, The boundary values ​​of the plurality of second driving power ranges are defined based on each of the candidate power points; Furthermore, the target power point determined based on the matching results is the power point with the highest power generation efficiency among the candidate power points that satisfy the second driving power range corresponding to the matching results.

8. The hybrid power system control method according to claim 6 or 7, characterized in that, The plurality of second driving power ranges includes a second extreme power range; When the required power of the vehicle is matched to the second limit power range, the rated power point of the range extender is determined as the target power point.

9. The hybrid power system control method according to claim 1, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the fourth charge range, the required power of the vehicle is compared with the sustainable discharge power of the power battery; If the required power of the vehicle is not greater than the sustainable discharge power, the target power point is determined to be zero. When the required power of the vehicle is greater than the sustainable discharge power, the target power point is determined as the second predetermined power point, wherein the second predetermined power point is a power point determined based on the average power demand under typical operating conditions and the efficiency characteristics of the range extender.

10. The hybrid power system control method according to claim 9, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the fifth energy range, the required power of the whole vehicle is compared with the second predetermined power point, wherein the fifth energy range is numerically lower than the fourth energy range; If the required power of the vehicle is not greater than the second predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the second predetermined power point, the target power point is determined as the third predetermined power point. The third predetermined power point is the power point among all the candidate power points that is greater than the second predetermined power point and ensures that there is still surplus power to charge the power battery after the required power of the vehicle is met.

11. The hybrid power system control method according to claim 10, characterized in that, The step of determining the target power point from all candidate power points based on the vehicle's required power includes: When the target operating state of charge range is the sixth energy range, the required power of the whole vehicle is compared with the fourth predetermined power point, wherein the fourth predetermined power point is less than the second predetermined power point, and the sixth energy range is numerically lower than the fifth energy range. If the required power of the whole vehicle is not greater than the fourth predetermined power point, the target power point is determined as the sustainable discharge power. If the required power of the vehicle is greater than the fourth predetermined power point, the target power point is determined as the third predetermined power point.

12. The hybrid power system control method according to claim 1, characterized in that, Following the step of controlling the operation of the range extender, the method further includes: Continuously monitor the power demand of the entire vehicle; The target power point is redefined if a change in the vehicle's required power is detected and one of the following conditions is met: The vehicle's required power remains below the first exit threshold for a first preset duration; or The vehicle's required power continues to be higher than the second exit threshold and reaches the second preset duration; The first exit threshold and the second exit threshold are both related to the current target power point and the preset switching buffer value.

13. The hybrid power system control method according to claim 1, characterized in that, Following the step of controlling the operation of the range extender, the method further includes: While the range extender is operating at a non-zero target power point, the state of charge (SOC) value of the power battery is continuously monitored. If the state of charge value is detected to rise to a level not lower than the preset target state of charge threshold, the current target control strategy is exited, and the step of matching the corresponding target control strategy from the preset control strategy set based on the operating condition and the state of charge value is re-executed.

14. An engineering device, characterized in that, include: Hybrid power system, including range extender and power battery; The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the hybrid power system control method according to any one of claims 1 to 13.

15. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the hybrid power system control method according to any one of claims 1 to 13.

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