A method and related device for optimizing power demand of a range extender system

Abstract

The application discloses a power requirement optimization method for a range extending system and a related device, which can be applied to engineering equipment with a range extending system providing a power source. By obtaining the control opening of an operation handle of the engineering equipment for controlling a material loading action, the power requirement of a working component performing the loading action is accurately estimated, and the set rotating speed of a working motor is determined. When the difference between the actual rotating speed of the working motor and the set rotating speed of the working motor is not within a preset range, the power generation power of the range extending system is gradually increased through a preset power increasing step, and then energy is provided to the working motor, so that when the engineering equipment is about to load high-load material, the working motor has sufficient power to respond to the estimated power requirement in time, and the working component of the engineering equipment can smoothly operate when performing the corresponding loading action, thereby improving the working efficiency of the engineering equipment during operation.

Description

Technical Field

[0001] This application relates to the field of engineering, specifically to a method and related apparatus for optimizing the power demand of a range-extended system. Background Technology

[0002] The power system of the equipment is powered by an electric motor, whose energy source is the discharge of the power battery and the generation of the range extender system.

[0003] Compared to small vehicles on the road, engineering equipment typically has two motors: a drive motor and a work motor. However, engineering equipment often involves loading heavy loads. During material grabbing and lifting, sudden load changes can lead to situations where the equipment's power is insufficient to drive the system. For example, when a loader is working, if the load is light, the actual power output is low, meaning the combined power of the battery discharge and the range extender is small. While the battery discharge is relatively constant due to its influence, the range extender's power output is usually adjusted when the power demand changes suddenly. However, the loader's power demand is affected by the load. If a heavy load is encountered, the rapid and unpredictable load changes can cause the range extender's power output to fail to adjust in time when suddenly grabbing or lifting a heavy load. This results in the loader operating at a lower power level, potentially causing the work motor's power to be insufficient for the vehicle's drive. This can lead to the loader's boom and bucket becoming stagnant, unable to respond quickly to the current situation, and ultimately reducing work efficiency. Summary of the Invention

[0004] In view of this, this application provides a method and related apparatus for optimizing the power demand of a range-extending system, which can improve the working efficiency of engineering equipment when operating under heavy load conditions.

[0005] To solve the above problems, the technical solution provided in this application is as follows:

[0006] On the one hand, this application provides a method for optimizing the power demand of a range-extended system, including:

[0007] The control opening degree of the operating handle of the engineering equipment is obtained. The operating handle is used to control the movement of the working component in the engineering equipment for material loading. The control opening degree is used to indicate the power requirement of the working component for material loading.

[0008] The set speed of the working motor is determined according to the control opening degree of the operating handle, and the working motor is used to provide power to the working component;

[0009] If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size. The range extender system is used to provide energy to the working motor.

[0010] In one possible implementation, the working components include a loading bucket and a power arm, and the control opening of the operating handle for acquiring the engineering equipment includes:

[0011] The first control opening of the operating handle relative to its fixed position on the X-axis and the second control opening of the operating handle relative to its fixed position on the Y-axis are obtained. The operating handle is used to control the bucket retraction speed in the X-axis direction and the operating handle is used to control the boom lifting speed in the Y-axis direction. The first control opening is greater than 0 to indicate that the engineering equipment is performing a bucket retraction action, and the second control opening is greater than 0 to indicate that the engineering equipment is performing a boom lifting action.

[0012] In one possible implementation, before gradually increasing the power generation setpoint of the range extender system according to a preset power increase step size, the method further includes:

[0013] The remaining battery power of the power battery in the engineering equipment is obtained, and the power battery is used together with the range extender system to provide energy to the working motor;

[0014] Determine the target charge state level of the remaining battery charge from multiple battery charge state levels;

[0015] The target power generation corresponding to the target charge state level is determined from the pre-established correspondence between charge state level and power generation.

[0016] The range extender system is controlled to generate electricity based on the target power output.

[0017] In one possible implementation, the method further includes:

[0018] When the target charge state level is at the highest level, if the total power demand of the engineering equipment is less than the sum of the discharge power of the power battery and the power generation power of the range extender system, the power generation power of the range extender system shall be reduced. The total power demand includes the power demand of the working motor, the power demand of the walking motor, and the sum of the power demand of the electric accessories of the engineering equipment.

[0019] In one possible implementation, the required power of the working motor is determined as follows:

[0020] When the engineering equipment performs the bucket-folding action and the boom-lifting action, the required power of the working motor is the maximum value of the required power for performing the bucket-folding action and the required power for the second control opening, wherein the required power for performing the bucket-folding action is the maximum value of the required power for the first control opening and the required power for tipping the bucket and lowering the boom.

[0021] When the engineering equipment performs the bucket-folding action but not the boom-lifting action, the required power of the working motor is [value], and the required power for performing the bucket-folding action is [value].

[0022] When the engineering equipment performs the boom lifting action but not the bucket retraction action, the required power of the working motor is the maximum of the required power of the second control opening and the required power of the bucket tipping and boom lowering.

[0023] When both the first control opening and the second control opening are 0, the required power of the working motor is the minimum required power to maintain power steering and braking.

[0024] In one possible implementation, if the difference between the actual speed of the working motor and the set speed of the working motor is not within a preset range, the power generation setting value of the range extender system is gradually increased according to a preset power increase step size, including:

[0025] If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range within the allowable delay time, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size.

[0026] In another aspect, this application provides a range extender system power demand optimization device, comprising:

[0027] An acquisition unit is used to acquire the control opening degree of the operating handle of the engineering equipment. The operating handle is used to control the movement of the working component in the engineering equipment for material loading. The control opening degree is used to indicate the power requirement of the working component for material loading.

[0028] The determining unit is used to determine the set speed of the working motor according to the control opening degree of the operating handle, and the working motor is used to provide power to the working component;

[0029] The power enhancement unit is used to gradually increase the power generation setting value of the range extender system according to a preset power enhancement step size if the difference between the actual speed of the working motor and the set speed of the working motor is not within a preset range. The range extender system is used to provide energy to the working motor.

[0030] In another aspect, this application provides a computer device, which includes a processor and a memory:

[0031] The memory is used to store computer programs;

[0032] The processor is configured to execute the method according to the computer program.

[0033] In another aspect, this application provides a computer-readable medium for storing a computer program that, when executed by a computer device, implements the method described thereon.

[0034] In another aspect, this application provides a computer program product including a computer program that, when run on a computer device, causes the computer device to perform the method.

[0035] Therefore, this application has the following beneficial effects:

[0036] The power demand optimization method and related apparatus for a range extender system provided in this application have the following advantages:

[0037] By acquiring the control opening degree of the operating handle of the engineering equipment, the power requirements of the working parts of the engineering equipment for material loading can be identified, and the set speed of the engineering equipment during operation can be determined. When the engineering equipment is under heavy load, if the difference between the actual speed of the working motor and the set speed is not within the preset range, the power generation setting value of the range extender system will be increased according to the preset power increase step size. This will enable the working motor to provide more power, allowing it to quickly respond to the power demand under heavy load conditions, fully guaranteeing the system drive requirements, realizing normal operation, and thus improving the efficiency of the engineering equipment operation. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A flowchart illustrating a method for optimizing the required power of a range-extended system, as provided in this application embodiment;

[0040] Figure 2 A schematic diagram illustrating the power generation enhancement of a range extender system provided in this application embodiment;

[0041] Figure 3A schematic diagram illustrating a battery charge state level classification provided in an embodiment of this application;

[0042] Figure 4 A schematic diagram illustrating the power demand estimation of a working motor, provided for an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of a range extender system power demand optimization device provided in an embodiment of this application. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0045] As described in the background section, the power generation capacity of existing range extender systems for engineering equipment is adjusted according to the power demand during operation. However, the power demand is affected by the load. Therefore, when the load changes, the adjustment of the power generation capacity of the range extender system has a large delay. In the engineering field, when engineering equipment suddenly encounters a large load loading condition, it is difficult to provide the required power in time, resulting in an inability to respond to the current working condition in a timely manner.

[0046] This application provides a method and related apparatus for optimizing the power demand of a range extender system. By changing the operating handle used to control the loading action in the engineering equipment, the power demand for material loading at the next moment is indicated. When the current motor power cannot meet the power demand for high-load material loading at the next moment, the power generation of the range extender system is increased to provide more power to the motor. This ensures that the motor power can support the system drive when the engineering equipment performs the material loading action, enabling the working parts used for loading in the engineering equipment to respond quickly to load changes, ensuring normal operation of the work, and improving work efficiency.

[0047] The method provided in this application is applied to engineering equipment powered by a range extender system, which can perform heavy-load material loading operations, such as loaders and excavators. Specifically, loaders can be wheel loaders, track loaders, skid steer loaders, telescopic boom loaders, mining loaders, etc.; excavators can be tracked excavators, wheeled excavators, long-arm excavators, mining excavators, etc. The drive method for loaders and excavators can be purely electric or a hybrid hydraulic system; this application does not impose any restrictions.

[0048] The field of engineering includes civil engineering, mechanical engineering, electrical engineering, chemical engineering, industrial engineering, control engineering, and so on. It involves the application of science, technology and mathematics to solve various practical problems. Each field has a specific focus and expertise, and engineers often use interdisciplinary knowledge and skills to solve complex engineering challenges.

[0049] Engineering equipment refers to the machinery and tools used in the construction, maintenance, testing, and operation of various engineering projects. Commonly used engineering equipment includes: excavators, bulldozers, loaders, and cranes in the civil engineering field; lathes, drilling machines, and grinding machines in the mechanical engineering field; and generators, transformers, and power tools in the electrical engineering field. These devices play a crucial role in the engineering field, helping to accomplish various tasks such as excavation, construction, transportation, surveying, and repair.

[0050] Range extender systems are technical systems used to extend the operating time of equipment or vehicles. In electric vehicles and plug-in hybrid vehicles, range extender systems are used to extend battery range. In engineering equipment, range extender systems optimize the power system to extend the operating time of the equipment or improve its efficiency.

[0051] The solutions provided in this application involve various technologies in the fields of civil engineering, machinery, and control, and are specifically illustrated through the following embodiments.

[0052] See Figure 1 The diagram shown is a flowchart of a range extender system power demand optimization method provided in an embodiment of this application. In this embodiment, it can be executed by the control system of engineering equipment.

[0053] S101: Obtain the control opening degree of the operating handle of the engineering equipment.

[0054] Operating handles are used to control the movement of working components in engineering equipment used for loading materials. Engineering equipment refers to machinery or tools that can load goods, such as loaders and excavators. Working components are the parts that directly participate in performing the loading action. For example, working components used for loading or unloading goods can be buckets or loader buckets. Working components that connect with the loading or unloading working components and work together to adjust the range of material handling can be booms or lifting arms.

[0055] The control opening of the operating handle includes the changes in the angle and position of the handle during operation. These control openings indicate the power requirements of the working parts of the engineering equipment for material loading.

[0056] Specifically, when operators drive engineering equipment, they control the various working parts to perform material loading actions by manipulating the displacement of the operating handles, thereby achieving the grabbing, unloading, lifting, and lowering of materials, etc.

[0057] The control system of the engineering equipment obtains the control opening degree of the operating handle of the engineering equipment, and can obtain the power demand of the working parts of the engineering equipment for material loading at the next moment, and then perform subsequent operations in response to the power demand.

[0058] S102: Determine the set speed of the working motor according to the control opening degree of the operating handle.

[0059] The working motor is used to provide power to the working parts of the engineering equipment so that different working parts can perform different actions for loading materials.

[0060] The rotational speed of the working motor is the number of times the motor's output shaft rotates per minute. It is an important parameter for measuring the motor's performance, indicating its power output. In engineering equipment, the set speed of the working motor refers to a pre-set target speed, the ideal speed value that the equipment is expected to achieve or maintain during operation. Different tasks may require different speed settings. A simple way to set the speed is to set three types based on the equipment's operating mode: idle speed, working speed, and maximum speed. The working speed has a uniform, fixed value during routine loading operations (loading, unloading, material lifting, material lowering), and is not an ideal speed value. In the embodiments of this application, the set speed of the working motor is determined based on the control opening of the operating handle to ensure a more ideal speed value for different loading actions.

[0061] The control opening degree of the operating handle of the engineering equipment indicates the power demand of the working parts of the engineering equipment for loading. Under normal circumstances, there is a positive correlation between the power demand and the motor speed. By controlling the opening degree of the operating handle, the power demand of the engineering equipment for loading is obtained. The greater the power demand, the greater the set speed value. The set speed of the working motor can ensure that the engineering equipment has better performance.

[0062] Step 103: If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size.

[0063] The working motor is powered by both the battery discharge power and the range extender system's power generation. Since the battery discharge power is affected by the amount of electricity, a high discharge power will cause the battery to be consumed more quickly, resulting in a shorter working time for the engineering equipment. Therefore, the power generation of the range extender system is usually adjusted to provide more energy to the working motor.

[0064] If the difference between the actual speed of the working motor and the set speed is within a preset range, it is considered that the current power of the working motor can meet the power requirements of the engineering equipment for material loading at the next moment, and the normal operation of the engineering equipment can be achieved. The preset range is a reasonable numerical range and does not affect the implementation of this embodiment.

[0065] The power boost step size refers to the amount of power increased each time the output power is adjusted, describing the incremental size of the power adjustment. The preset power boost step size is a reasonable value and does not affect the implementation of this embodiment.

[0066] The power generation setting value of the range extender system is a value preset by the system based on actual needs. By changing the power generation setting value of the range extender system, the actual speed of the working motor can be indirectly adjusted, so that the output power of the working motor can meet the system drive requirements when the engineering equipment is working in the next moment.

[0067] Specifically, the actual speed and set speed of the working motor are monitored in real time. If the difference between the actual speed and the set speed is not within a preset range, it is considered that the current motor power does not meet the power demand of the system for the next operation of the engineering equipment. Therefore, the power generation setting of the range extender system is gradually increased according to a preset power increase step size. This allows for timely adjustment of the working motor's output power to quickly match the power demand of the next operating condition. Furthermore, this gradual increase in the power generation setting of the range extender system allows for a more accurate match between the output power and the power demand of the next operation, ensuring the working motor provides sufficient system drive energy while reducing energy waste and maximizing the performance of the engineering equipment.

[0068] exist Figure 1 In the embodiment of the invention shown, the power demand of the engineering equipment for material loading at the next moment is accurately predicted by controlling the opening degree of the operating handle. When the output power of the working motor does not meet the power demand, the power generation setting value of the range extender system is gradually increased to provide power to the working motor of the engineering equipment. This achieves rapid matching between the output power of the working motor and the power demand at the next moment, so that when the material load suddenly increases, the working parts of the engineering equipment can respond to the operation in a timely manner and achieve precise control of power energy, thereby improving the overall energy efficiency of the engineering equipment.

[0069] The control system of the engineering equipment adjusts the output power of the working motor by increasing the power generation of the range extender system. The increase in the output power of the working motor is specifically manifested in the increase in the actual speed of the working motor. By comparing the adjusted actual speed with the required speed, it is determined whether the output power of the working motor meets the required power. In this process, the speed adjustment of the working motor takes a certain amount of time.

[0070] In one possible implementation, if the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range within the allowable delay time of the working motor speed requirement, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size.

[0071] refer to Figure 2 The diagram shown is a schematic of a range extender system power generation enhancement according to an embodiment of this application. Specifically, the working motor demand power status adjustment bit is used as a selection condition to determine whether it is necessary to increase the power generation setting value of the range extender system. If the working motor demand power adjustment status bit is 0, the power generation of the range extender system is gradually increased according to the preset power increase step size. If the working motor demand power adjustment status bit is 1, the range extender system still maintains the current range extender power generation setting value to provide power to the working motor.

[0072] The power demand calculation module schedules the power demand of the working motor periodically. If the set speed of the working motor is always greater than the actual speed of the working motor within the allowable delay time, the power generation of the range extender is gradually increased according to the preset power increase step size to provide power to the working motor, thereby increasing the actual speed of the working motor. If the set speed of the working motor is less than the actual speed, the actual speed of the working motor is reset to return to the set speed.

[0073] The working motor power demand adjustment status is determined by comparing the set speed of the working motor with the adjusted actual speed. When the adjusted actual speed of the working motor is equal to the set speed, the working motor power demand adjustment status is set to 1; otherwise, the working motor power demand adjustment status is set to 0.

[0074] In this way, by taking into account the practical need for dynamic adjustment of the working motor speed, the comparison error caused by the working motor speed adjustment time is reduced, excessive adjustment of the range extender system's power generation is avoided, and the stability and safety of the system are improved.

[0075] When the engineering equipment is in operation, the working motor needs to have a large output power to operate. At this time, the power generation of the range extender system can be preset so that when the remaining power of the working motor is different and the battery discharge power is unstable, the working motor still has an output power that roughly matches the power required in the working state and can be used for operation.

[0076] In one possible implementation, before gradually increasing the power generation setting value of the range extender system according to the preset power increase step size, the following steps S104-S107 may also be performed.

[0077] S104: Obtain the remaining battery power of the power battery in the engineering equipment.

[0078] The power battery is used together with the range extender system to provide energy to the working motor.

[0079] S105: Determine the target charge state level of the remaining battery charge from multiple battery charge state levels.

[0080] The state of charge (SOC) level is an important indicator for measuring the current charge level of a battery. This application classifies the SOC level based on the remaining charge level of the battery.

[0081] refer to Figure 3 The diagram shown is a schematic representation of a battery state of charge (SOC) classification according to an embodiment of this application, and is only used to illustrate one possible implementation. Specifically, the battery SOC is divided into n levels, where X, Y, ..., Z represent the remaining battery charge, expressed as a percentage. The values ​​increase gradually from left to right. When the remaining charge is less than X, the SOC level is level 1, the lowest level. When the remaining charge is greater than or equal to X but less than Y, the SOC level is level 2, and so on. The battery SOC is classified sequentially based on the amount of remaining charge. When the remaining charge is less than Z, the SOC level is level n-1; when the remaining charge is greater than or equal to Z, the SOC level is level n. In this classification method, the more remaining charge the battery has, the higher the target SOC level. Of course, other reasonable methods can be used for this classification without affecting the implementation of this embodiment.

[0082] S106: Determine the target power generation corresponding to the target charge state level from the pre-established correspondence between charge state level and power generation.

[0083] The pre-established correspondence between charge state level and power generation corresponds to the battery charge state level and the expected power generation of the range extender system. This can be configured such that, as the charge state level increases, the power generation decreases sequentially from the maximum achievable power generation of the range extender system. Of course, other reasonable methods can also be used for this setting, without affecting the implementation of this embodiment. The target power generation is the power generation that the range extender system needs to achieve.

[0084] S107: Control the range extender system to generate electricity based on the target power output.

[0085] The control system of the engineering equipment controls the range extender system to generate electricity based on the target power output.

[0086] The power generation of the range extender system is initially preset based on the remaining battery power. When facing high load conditions, only minor adjustments to the power generation of the range extender system are needed, which improves the efficiency of power generation adjustment and ensures timely response of the working motor.

[0087] When the battery has the highest remaining charge, i.e., the highest state of charge level, the output power of the working motor may exceed the power required for system drive. In this case, the range extender system will continue to charge the power battery, which can easily cause the battery temperature to rise and damage the battery life.

[0088] In one possible implementation, when the target charge state level is at the highest level, if the total power demand of the engineering equipment is less than the sum of the discharge power of the power battery and the power generation power of the range extender system, the power generation power of the range extender system is reduced.

[0089] The total power requirement includes the combined power requirements of the working motor, the traveling motor, and the electric accessories of the engineering equipment. The engineering equipment used for loading has two operating modes: traveling and working. Each mode has one motor providing power, with both motors powered by the discharge of the battery and the generation of the range extender system. Furthermore, due to the need for various electric accessories, such as electric cylinders, electric auxiliary steering systems, and electric control panels, to ensure the overall performance of the engineering equipment, the power requirements of the working motor, traveling motor, and electric accessories must be comprehensively considered when calculating the total demand.

[0090] The required power of the travel motor is based on existing technology. The required power of the travel motor can be obtained based on the current speed of the engineering equipment and the opening of the accelerator pedal. Other methods of calculating the required power of the travel motor do not affect the implementation of this embodiment.

[0091] When engineering equipment is in operation, the load of the loaded goods is difficult to calculate. In this application, in order to make a more accurate estimate of the power required by the working motor, the correspondence between the control opening of the operating handle of the engineering equipment and the loading action to be performed is further described.

[0092] In one possible implementation, the working components include a loading bucket and a power boom. Specifically, acquiring the control opening of the operating handle of the engineering equipment can involve acquiring a first control opening of the operating handle relative to its fixed position on the X-axis and a second control opening of the operating handle relative to its fixed position on the Y-axis. The operating handle is used to control the bucket retraction speed in the X-axis direction and to control the lifting speed of the power boom in the Y-axis direction. A first control opening greater than 0 indicates that the engineering equipment is performing a bucket retraction action, and a second control opening greater than 0 indicates that the engineering equipment is performing a boom lifting action.

[0093] Specifically, taking a loader as an example, the working parts of a loader used for loading materials include a loading bucket and a power arm. The loading bucket is used for grabbing and unloading materials, and the power arm is connected to the loading bucket to adjust the range of material handling together.

[0094] The loader has two working parts for controlling material loading, and correspondingly two operating handles. The control opening degrees of these different operating handles are distinguished by different names. The first control opening degree of the operating handle relative to its fixed position on the X-axis is used to control the loading bucket, and the second control opening degree of the operating handle relative to its fixed position on the Y-axis is used to control the boom. Based on the characteristics of the loader, when the operating handle controlling the loading bucket moves forward from its position, it indicates that the loading bucket is retracting to grab material; in this case, the first control opening degree on the X-axis is greater than 0. Similarly, when the operating handle controlling the boom moves forward from its position, it indicates that the boom is lifting; in this case, the second opening degree on the Y-axis is greater than 0.

[0095] Furthermore, when the loader's control handle for the loading bucket moves forward from its current position and then backward to its initial position, it indicates that the loading bucket is performing a tipping action to unload materials. During the backward movement of the control handle, the initial control opening on the X-axis is less than 0. Similarly, when the loader's control handle for the boom moves forward from its current position and then backward to its initial position, it indicates that the boom is performing a lowering action to lower materials. During the backward movement of the control handle, the control opening on the Y-axis is less than 0. When the control handle is inactive at its initial position, its control opening is 0.

[0096] The correlation between the loading action of engineering equipment and the control opening of the operating handles used to control different working parts can help estimate the power required when the engineering equipment performs different loading actions.

[0097] When engineering equipment is operating, the power required to perform the loading or lifting of materials is greater than the power required to perform the unloading or lowering of materials. The power requirement of the working motor is estimated for the two power-demanding actions when the engineering equipment is loading goods.

[0098] In one possible implementation, the required power of the working motor is determined as follows:

[0099] When the engineering equipment performs the bucket retraction and boom lifting actions, the required power of the working motor is the maximum value of the required power for performing the bucket retraction action and the required power for the second control opening. Among them, the required power for performing the bucket retraction action is the maximum value of the required power for the first control opening and the maximum value of the required power for tipping the bucket and lowering the boom.

[0100] When the engineering equipment performs the bucket-folding action but not the boom-lifting action, the required power of the working motor is [value], and the required power for performing the bucket-folding action is [value].

[0101] When the engineering equipment performs the boom lifting action but not the bucket retraction action, the required power of the working motor is the maximum of the required power of the second control opening and the required power of the bucket tipping and boom lowering.

[0102] When both the first control opening and the second control opening are 0, the required power of the working motor is the minimum required power to maintain power steering and braking.

[0103] Specifically, taking loaders as an example, this analysis focuses on two states requiring high power output: boom lifting and bucket retraction. (Reference) Figure 4 The diagram illustrates a method for estimating the required power of a working motor according to an embodiment of this application. The diagram shows three selection conditions: bucket retraction, boom lifting, and handle inactivity. When the bucket retraction is performed, the route labeled 1 is selected as the input route; otherwise, the route labeled 0 is selected. Similarly, when the boom lifting is performed, the route labeled 1 is selected as the input route; otherwise, the route labeled 0 is selected. When the handle is inactivity, the route labeled 1 is selected as the input route; otherwise, the route labeled 1 is selected.

[0104] Based on the above three conditions, the required power of the working motor is estimated:

[0105] When the loader performs the bucket retraction and boom lifting actions, the power required by the working motor is the maximum of the power required for the bucket retraction action and the power required for the second control opening. The power required for the bucket retraction action is the maximum of the power required for the first control opening and the power required for both bucket tipping and boom lowering. The power required for the first control opening is obtained from the power requirement curve, and the power required for the second control opening is obtained from the power requirement curve.

[0106] Based on the working characteristics of loaders, loaders typically do not reach their maximum power requirements simultaneously during the loading, unloading, lifting, and lowering of materials. Choosing the maximum value under different loading actions, rather than the sum value, as the required power of the working motor can ensure that the loader can receive sufficient power support in any single working mode.

[0107] When the loader is performing the bucket retraction action but not the boom lifting action, the required power of the working motor is [value], and the required power is [value] when performing the bucket retraction action.

[0108] When the loader performs the boom lifting action but not the bucket retraction action, the power required by the working motor is the power required by the second control opening, and the maximum value of the power required by the bucket tipping and boom lowering actions.

[0109] Specifically, when the loader performs the bucket retraction or boom lifting action, the power required for bucket tipping and boom lowering is included in the comparison to prevent calibration errors in the power required for different loading actions.

[0110] When the handle is not in motion, both the first and second control openings of the operating handle are 0, indicating that the loader is not performing any loading actions. The required power of the working motor is the minimum required power to maintain power steering and braking.

[0111] By analyzing the power demand of the working motors based on the loading actions of the engineering equipment, a more accurate prediction of the power demand of the working motors can be achieved when the load cannot be calculated.

[0112] In summary, by adjusting the power output of the range extender system when the state of charge is at its highest level, the harmful effects of continuously charging the battery by the range extender system are avoided, and energy waste is reduced.

[0113] Based on the above embodiments, the proposed method for optimizing the power demand of a range-extended system is further described below with reference to the accompanying drawings.

[0114] refer to Figure 5 The diagram shown is a schematic of a range extender system power demand optimization device according to an embodiment of this application. The device 500 includes:

[0115] The acquisition unit 501 is used to acquire the control opening degree of the operating handle of the engineering equipment. The operating handle is used to control the movement of the working part of the engineering equipment for material loading. The control opening degree is used to indicate the power requirement of the working part for material loading.

[0116] The determining unit 502 is used to determine the set speed of the working motor according to the control opening degree of the operating handle, and the working motor is used to provide power to the working component;

[0117] The power enhancement unit 503 is used to gradually increase the power generation setting value of the range extender system according to a preset power enhancement step size if the difference between the actual speed of the working motor and the set speed of the working motor is not within a preset range. The range extender system is used to provide energy to the working motor.

[0118] In one possible implementation, the acquisition unit is used for:

[0119] The first control opening of the operating handle relative to its fixed position on the X-axis and the second control opening of the operating handle relative to its fixed position on the Y-axis are obtained. The operating handle is used to control the bucket retraction speed in the X-axis direction and the operating handle is used to control the boom lifting speed in the Y-axis direction. The first control opening is greater than 0 to indicate that the engineering equipment is performing a bucket retraction action, and the second control opening is greater than 0 to indicate that the engineering equipment is performing a boom lifting action.

[0120] In one possible implementation, the acquisition unit is further configured to:

[0121] The remaining battery power of the power battery in the engineering equipment is obtained. The power battery is used to provide energy to the working motor together with the range extender system.

[0122] In one possible implementation, the determining unit is further configured to:

[0123] Determine the target charge state level of the remaining battery charge from multiple battery charge state levels.

[0124] In one possible implementation, the determining unit is further configured to:

[0125] The target power generation corresponding to the target charge state level is determined from the pre-established correspondence between charge state level and power generation.

[0126] In one possible implementation, the device further includes:

[0127] A control unit is used to control the range extender system to generate electricity based on the target power output.

[0128] In one possible implementation, the device further includes:

[0129] The power reduction unit is used to reduce the power generation of the range extender system when the target charge state level is at the highest level, if the total power demand of the engineering equipment is less than the sum of the discharge power of the power battery and the power generation of the range extender system. The total power demand includes the power demand of the working motor, the power demand of the walking motor, and the sum of the power demand of the electric accessories of the engineering equipment.

[0130] In one possible implementation, the determining unit is further configured to:

[0131] When the engineering equipment performs the bucket-folding action and the boom-lifting action, the required power of the working motor is determined to be the maximum value of the required power for performing the bucket-folding action and the required power for the second control opening, wherein the required power for performing the bucket-folding action is the maximum value of the required power for the first control opening and the required power for tipping the bucket and lowering the boom.

[0132] When the engineering equipment performs the bucket-folding action but not the boom-lifting action, the required power of the working motor is determined to be the required power for performing the bucket-folding action;

[0133] When the engineering equipment performs the boom lifting action but not the bucket retraction action, the required power of the working motor is determined to be the maximum value of the required power of the second control opening and the required power of the bucket tipping and boom lowering.

[0134] When both the first control opening and the second control opening are 0, the required power of the working motor is determined to be the minimum required power to maintain power steering and braking.

[0135] In one possible implementation, the power boosting unit is used for:

[0136] If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range within the allowable delay time, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size.

[0137] Based on the above embodiments, this application provides a computer device, including:

[0138] Memory, used to store computer programs;

[0139] A processor, used to execute the computer program to implement the steps of the range-extended system demand power optimization method described above.

[0140] Based on the above embodiments, this application also provides a computer-readable medium storing a computer program, which, when processed and executed, implements the steps of the above-described range-extended system demand power optimization method.

[0141] Based on the above embodiments, this application also provides a computer program product including a computer program, which, when run on a computer device, causes the computer device to perform the steps of the range-extended system demand power optimization method.

[0142] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0143] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for optimizing the power demand of a range-extended system, characterized in that, The method includes: The control opening degree of the operating handle of the engineering equipment is obtained. The operating handle is used to control the movement of the working component in the engineering equipment for material loading. The control opening degree is used to indicate the power requirement of the working component for material loading. The set speed of the working motor is determined according to the control opening degree of the operating handle, and the working motor is used to provide power to the working component; If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range, the remaining battery power of the power battery in the engineering equipment is obtained. The power battery is used together with the range extender system to provide energy to the working motor. Determine the target charge state level of the remaining battery charge from multiple battery charge state levels; The target power generation corresponding to the target charge state level is determined from the pre-established correspondence between charge state level and power generation. The range extender system is controlled to generate electricity based on the target power output; The power generation setting of the range extender system is gradually increased according to the preset power increase step size. The range extender system is used to provide energy to the working motor. When the target charge state level is at the highest level, if the total power demand of the engineering equipment is less than the sum of the discharge power of the power battery and the power generation power of the range extender system, the power generation power of the range extender system shall be reduced. The total power demand includes the power demand of the working motor, the power demand of the walking motor, and the sum of the power demand of the electric accessories of the engineering equipment.

2. The method according to claim 1, characterized in that, The working components include a loading bucket and a power arm, and the control opening degree of the operating handle for acquiring the engineering equipment includes: The first control opening of the operating handle relative to its fixed position on the X-axis and the second control opening of the operating handle relative to its fixed position on the Y-axis are obtained. The operating handle is used to control the bucket retraction speed in the X-axis direction and the operating handle is used to control the boom lifting speed in the Y-axis direction. The first control opening is greater than 0 to indicate that the engineering equipment is performing a bucket retraction action, and the second control opening is greater than 0 to indicate that the engineering equipment is performing a boom lifting action.

3. The method according to claim 2, characterized in that, The required power of the working motor is determined in the following way: When the engineering equipment performs the bucket-folding action and the boom-lifting action, the required power of the working motor is the maximum value of the required power for performing the bucket-folding action and the required power for the second control opening, wherein the required power for performing the bucket-folding action is the maximum value of the required power for the first control opening and the required power for tipping the bucket and lowering the boom. When the engineering equipment performs the bucket-folding action but not the boom-lifting action, the required power of the working motor is [value], and the required power for performing the bucket-folding action is [value]. When the engineering equipment performs the boom lifting action but not the bucket retraction action, the required power of the working motor is the maximum of the required power of the second control opening and the required power of the bucket tipping and boom lowering. When both the first control opening and the second control opening are 0, the required power of the working motor is the minimum required power to maintain power steering and braking.

4. The method according to claim 1, characterized in that, If the difference between the actual speed of the working motor and the set speed of the working motor is not within a preset range, the power generation setting value of the range extender system is gradually increased according to a preset power increase step size, including: If the difference between the actual speed of the working motor and the set speed of the working motor is not within the preset range within the allowable delay time, the power generation setting value of the range extender system is gradually increased according to the preset power increase step size.

5. A power demand optimization device for a range extender system, characterized in that, The device includes: An acquisition unit is used to acquire the control opening degree of the operating handle of the engineering equipment. The operating handle is used to control the movement of the working component in the engineering equipment for material loading. The control opening degree is used to indicate the power requirement of the working component for material loading. The determining unit is used to determine the set speed of the working motor according to the control opening degree of the operating handle, and the working motor is used to provide power to the working component; The acquisition unit is also used to acquire the remaining battery power of the power battery in the engineering equipment, the power battery being used together with the range extender system to provide energy to the working motor; The determining unit is also configured to determine the target charge state level of the remaining battery charge from multiple battery charge state levels; The determining unit is also used to determine the target power generation corresponding to the target charge state level from a pre-established correspondence between charge state level and power generation. A control unit is used to control the range extender system to generate electricity based on the target power output. The power enhancement unit is used to gradually increase the power generation setting value of the range extender system according to a preset power enhancement step size if the difference between the actual speed of the working motor and the set speed of the working motor is not within a preset range. The range extender system is used to provide energy to the working motor. The power reduction unit is used to reduce the power generation of the range extender system when the target charge state level is at the highest level, if the total power demand of the engineering equipment is less than the sum of the discharge power of the power battery and the power generation of the range extender system. The total power demand includes the power demand of the working motor, the power demand of the walking motor, and the sum of the power demand of the electric accessories of the engineering equipment.

6. A computer device, characterized in that, The computer device includes a processor and memory: The memory is used to store computer programs; The processor is configured to perform the method according to any one of claims 1-4 according to the computer program.

7. A computer-readable medium, characterized in that, The computer-readable medium is used to store a computer program that, when executed by a computer device, performs the method described in any one of claims 1-4.

8. A computer program product comprising a computer program, characterized in that, When it is run on a computer device, it causes the computer device to perform the method described in any one of claims 1-4.

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