An engineering vehicle energy management system and control method

Abstract

The application provides an engineering vehicle energy management system and a control method. The system comprises: a load power acquisition module for acquiring vehicle load power consumption; a combined inertial navigation module for acquiring a combined inertial navigation signal of the vehicle; a cooling system for cooling and cooling the power battery, the driving motor, the motor controller and the range extender; a battery information acquisition module for acquiring power battery information, wherein the power battery information comprises a battery SOC; and a power domain controller for determining a current operating condition dynamic adjustment range extender control strategy according to the combined inertial navigation signal, the vehicle load power consumption and the battery SOC, and entering the range extender control strategy in advance for an upcoming operating condition. For a mine closed, path fixed and regular operating condition scene, the range extender operating power is adjusted on demand, fuel consumption is reduced, the vehicle driving range is improved, and the energy recovery strategy is optimized for different operating conditions.

Description

Technical Field

[0001] This application relates to an energy management system and control method for engineering vehicles, belonging to the field of energy management technology for engineering vehicles. Background Technology

[0002] In current mining operations, range-extended engineering vehicles serve as core transportation equipment. Their working environment is characterized by strong enclosure, poor air circulation, high dust concentration, and frequent vibration and impact. Moreover, the working path is fixed, but the switching patterns of working conditions (flat roads, long / short uphill and downhill slopes) are obvious.

[0003] In related technologies, the energy management of range-extended engineering vehicles mostly adopts a general strategy and is not optimized for the fixed routes and working conditions of mines. On the one hand, the range extender is often in a "passive start-stop" state. For example, if it is not recharged in advance before a long uphill, it will easily lead to insufficient power. On flat roads, it will still run at high power when the battery is high, resulting in fuel waste. On the other hand, energy recovery is not combined with the characteristics of fixed downhill sections and deceleration areas. For example, on long downhills, the recovery of gravitational potential energy is not maximized, and on short downhills, the recovery intensity is inappropriate, which leads to excessive braking or energy waste. This results in limited power battery range and insufficient vehicle range, making it difficult to meet the needs of long-term high-intensity operations in mines.

[0004] Meanwhile, simply increasing battery capacity or adding energy recovery equipment to improve range would significantly increase system complexity and vehicle manufacturing costs. It could also increase energy consumption due to the increased weight of the equipment, further weakening economic viability and affecting commercialization. Summary of the Invention

[0005] In view of at least one of the above technical problems, this application provides an energy management system and control method for engineering vehicles, which is adapted to mining conditions and takes into account both energy utilization efficiency and operational reliability.

[0006] To solve the above-mentioned technical problems, the technical solution adopted in this application is: According to a first aspect of this application, an energy management system for engineering vehicles is provided, comprising: The load power acquisition module is used to collect the power consumption of the vehicle load and send it to the power domain controller; The integrated inertial navigation module is used to acquire the vehicle's integrated inertial navigation signals and send them to the dynamic domain controller; wherein the integrated inertial navigation signals include the vehicle's real-time latitude and longitude and vehicle attitude information; The cooling system, including a water pump and a cooling fan, is signal-connected to the power domain controller and is used to cool the power battery, drive motor, motor controller and range extender. The battery information acquisition module is used to collect power battery information and send it to the power domain controller; the power battery information includes the battery SOC. The power domain controller is used to determine the current operating conditions based on the combined inertial navigation signal, the vehicle load power consumption, and the battery SOC, and dynamically adjust the range extender control strategy in advance for upcoming operating conditions.

[0007] In some embodiments, the engineering vehicle energy management system further includes an in-cab control switch, comprising: The road condition scanning switch is used to activate the road condition scanning mode to generate a two-dimensional query table of latitude and longitude and mining area operating conditions. The range extender economy mode switch is used to switch the range extender to "optimal fuel economy power mode".

[0008] According to a second aspect of this application, a control method for the aforementioned engineering vehicle energy management system is provided, comprising: When the vehicle is powered by high voltage, if the power domain controller has a two-dimensional lookup table of latitude and longitude and mining area operating conditions, and the vehicle speed is greater than 0, the current latitude and longitude will be obtained in real time. Based on the current latitude and longitude, and combined with the latitude and longitude-mining area operation condition query table, the current operation condition and the upcoming operation condition can be obtained; among which the operation conditions include flat road operation condition, long downhill operation condition, long uphill operation condition, short downhill operation condition or short uphill operation condition. The range extender control strategy is dynamically adjusted based on the current operating conditions, and the system is prepared to enter the operating conditions in advance.

[0009] In some embodiments, the method for constructing the latitude-longitude-mining area operating condition two-dimensional query table includes: When the vehicle speed is greater than 0 and the road condition scanning switch is turned on, the power domain controller receives the combined inertial navigation signal uploaded by the combined inertial navigation module and the total vehicle load power consumption uploaded by the load power acquisition module in real time. The current operating condition is determined by combining the combined inertial navigation signals and the power consumption of the vehicle load. A two-dimensional query table of latitude and longitude-mining area operating conditions is generated based on the current operating conditions and the corresponding latitude and longitude, and stored in the power domain controller.

[0010] In some embodiments, for flat road conditions, the range extender control strategy includes: If the battery SOC is greater than the second charge value, the range extender is not in the power generation state, and the recharge power of the drive motor is not greater than the recharge power threshold, then pure electric driving will be carried out. If the battery SOC is greater than the second charge value, the range extender is not in the power generation state, and the recharge power of the drive motor is greater than the recharge power threshold, the range extender will be started to enter the high-voltage reverse drag range extender power consumption mode to achieve safe braking of the motor. If the battery SOC is less than the first charge value or the battery SOC is greater than the second charge value and the range extender is in the power generation operation state, the target power generation power of the range extender is set according to the power consumption of the vehicle load, and the range extender is started. The target power generation power of the range extender is sent to the range extender controller to charge the power battery and supply power to the drive system. Among them, the target power generation of the range extender is set based on the power consumption of the vehicle load, including: If the total power consumption of the vehicle load is less than the first power consumption value, the target power generation of the range extender is set to be equal to the optimal fuel-efficient charging power. If the total power consumption of the vehicle load is greater than the second power consumption value, the target power generation of the range extender is set to be equal to the sum of the optimal fuel economy charging power and the total power consumption of the vehicle load; the second power consumption value is greater than the first power consumption value. If the high-voltage components of the vehicle feed energy back to the battery system, the target power generation of the range extender is set to be equal to the difference between the optimal fuel-efficient charging power and the power consumption of the vehicle load. During operation, the range extender control strategy under flat road conditions will monitor the battery SOC in real time. If the range extender charges the power battery to a level where the battery SOC is greater than the third charge value, the target power generation of the range extender will be set to the idle power generation. Once the actual power generation of the range extender drops to the idle power generation, the range extender will be turned off and pure electric driving will be performed. Among them, the third power value > the second power value > the first power value.

[0011] In some embodiments, for long downhill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, the range extender is turned off and the energy recovery intensity is adjusted to the highest level; and if at least one of the battery, motor, and motor controller temperatures is greater than the corresponding temperature threshold, the cooling system is switched to full power operation mode—the cooling fan runs at the highest speed, the coolant circulation pump works at full load, and the battery, motor, and motor controller temperatures are stabilized within the optimal operating range. If the battery SOC is greater than the second charge value and the drive motor recharge power is greater than the recharge power threshold, the range extender will be started and enter the high-voltage reverse drag range extender power consumption mode.

[0012] In some embodiments, for short downhill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, the range extender maintains idle power generation and adjusts the energy recovery intensity to a moderate level. If the battery SOC is greater than the second charge value and the drive motor recharge power is greater than the recharge power threshold, the range extender will start and enter the high-voltage reverse drag range extender power consumption mode.

[0013] In some embodiments, for long uphill driving conditions, the range extender control strategy includes: Once the working condition switching module confirms that the engineering vehicle has entered the long uphill working condition, it first performs the "range extender pre-start" operation: directly starts the range extender and sets the target power generation of the range extender to the idle power generation. Once the range extender's actual power generation reaches its idle power generation, the power domain controller adjusts the range extender's target power generation based on the battery's state of charge (SOC). If the battery SOC is less than the first charge value, the target power generation of the range extender is set to be equal to the maximum power of the range extender. If the battery SOC is between the first and third charge values, the target power output of the range extender is set to be equal to the optimal fuel-efficient charging power.

[0014] In some embodiments, for short uphill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, start the range extender and set the target power generation of the range extender to be equal to the maximum power of the range extender; If the battery SOC is between the first and third charge values, pure electric driving will be performed. If the power consumption of the vehicle load exceeds the limit, the power output of the drive system will be temporarily restricted.

[0015] In some embodiments, a predictive and adaptive control strategy is adopted for different working condition transition scenarios of engineering vehicles, including: If the current operating condition is a flat road condition, and the operating condition is to be a long downhill condition, the operating condition switching module will switch to the long downhill condition in advance. If the battery SOC is less than the first charge value, the energy recovery intensity will be adjusted to the highest level, and the power battery will be charged by the reverse braking of the motor to maximize the recovery of gravitational potential energy. If the current operating condition is flat road condition, and the operating condition is about to be long uphill condition, the operating condition switching module will switch to long uphill condition in advance. If the battery SOC is less than the first charge value, the range extender will start to run at full power in advance. If the current operating condition is a short downhill condition, and the operating condition is to be a short uphill condition, the operating condition switching module will switch to the short uphill condition in advance, and reduce the energy recovery intensity and let the range extender idle power generation standby. If the current operating condition is a long downhill slope, the operating condition will be changed to a flat road condition. The operating condition switching module will switch to the flat road condition in advance and reduce the energy recovery intensity and the recharge power of the drive motor.

[0016] According to a third aspect of this application, this application also provides an engineering vehicle equipped with the aforementioned engineering vehicle energy management system.

[0017] The beneficial effects achieved by this application are as follows: Based on the power battery and drive system of engineering vehicles, this application constructs an energy management system and control method for engineering vehicles based on road condition prediction. By using a combined inertial navigation module to generate a working condition lookup table, it can predict working conditions such as flat roads and long / short uphill / downhill slopes in advance, dynamically optimize the start-stop and power of the range extender, and the intensity of energy recovery, so as to realize on-demand power generation, efficient recovery of potential energy and kinetic energy, improve battery range and vehicle range, reduce fuel waste, and meet the needs of long-term high-intensity operations in mines. Attached Figure Description

[0018] Figure 1 A schematic diagram of the power battery and drive system for an engineering vehicle provided in an embodiment of this application; Figure 2 A schematic diagram of an engineering vehicle energy management system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the control method for the energy management system of engineering vehicles provided in an embodiment of this application; Figure 4 A schematic diagram of a range-extended power generation and energy recovery control method under flat road conditions provided in an embodiment of this application; Figure 5 A schematic diagram of a range-extended power generation and energy recovery control method under long downhill conditions provided in an embodiment of this application; Figure 6 A schematic diagram of a range-extended power generation and energy recovery control method under short downhill conditions provided in an embodiment of this application; Figure 7 A schematic diagram of a range-extended power generation and energy recovery control method under long uphill conditions provided in an embodiment of this application; Figure 8 This is a schematic diagram of a range-extended power generation and energy recovery control method under short uphill conditions provided in an embodiment of this application. Detailed Implementation

[0019] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and should not be used to limit the scope of protection of the present application.

[0020] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] The technical terms are defined as follows: SOC—Remaining battery capacity—is a core parameter that measures the ratio of a battery's remaining usable capacity to its fully charged state capacity, with a value ranging from 0 to 1 (equivalent to 0%-100%).

[0023] In energy management for engineering vehicles, relevant technologies employ a control strategy based on State of Charge (SOC) thresholds. When the battery SOC falls below a certain threshold, the range extender is activated to generate electricity; when it exceeds another threshold, the range extender is deactivated, and the vehicle operates in pure electric mode. Simultaneously, the range extender's output power is adjusted based on the vehicle's real-time power demands. Some patents also utilize sensors for slope and acceleration to monitor the vehicle's current operating conditions in real time. For example, if an uphill slope is detected, the range extender's power is increased; if a downhill slope is detected, the energy recovery system is activated, adjusting energy distribution according to real-time conditions. However, this SOC threshold-based control strategy fails to consider the actual road conditions and operating characteristics of the engineering vehicle, leading to inappropriate timing for the range extender's activation and deactivation. For instance, if the battery SOC is below the threshold and the range extender doesn't activate before entering a long uphill section, insufficient power during the climb and excessive battery discharge will occur. Real-time operating condition response solutions lack the ability to predict subsequent road conditions and can only address the current situation. For example, when engineering vehicles are about to enter a long downhill section, they cannot predict this in advance and cannot activate the energy recovery strategy in advance, resulting in insufficient energy recovery, a large amount of potential energy wasted, and low overall energy utilization efficiency.

[0024] For the closed, fixed-path, and repetitive operating scenarios of mines, this application addresses the problems of poor adaptability, low energy utilization, and insufficient operating range of existing energy management strategies for range-extended engineering vehicles, while avoiding the increased cost and complexity of additional equipment. This embodiment constructs an energy management system and control method for engineering vehicles based on road condition prediction. It utilizes a combined inertial navigation module to generate an operating condition lookup table, predicting operating conditions such as flat roads and long / short inclines / declines in advance. This dynamically optimizes the start-stop and power of the range extender, as well as the energy recovery intensity, achieving on-demand power generation, efficient recovery of potential and kinetic energy, improving battery range and overall vehicle range, reducing fuel waste, and meeting the demands of long-duration, high-intensity operations in mines.

[0025] Example 1: As Figure 1As shown, the power battery and drive system of the engineering vehicle includes a drive motor, a motor controller, a power battery, a range extender, a battery temperature management system, and a power domain controller. Each wheel is equipped with a drive motor and a motor controller. The range extender and the power battery are connected to each drive motor and motor controller to provide power. The battery temperature management system is connected to the power battery via signal, and the power domain controller is connected to each motor controller via signal.

[0026] Based on this, such as Figure 2 As shown in the figure, this application provides an energy management system for engineering vehicles based on road condition prediction, including: The load power acquisition module is used to collect the power consumption of the vehicle load and send it to the power domain controller; The integrated inertial navigation module is used to acquire the vehicle's integrated inertial navigation signals and send them to the dynamic domain controller; wherein the integrated inertial navigation signals include the vehicle's real-time latitude and longitude and vehicle attitude information; The cooling system, including a water pump and a cooling fan, is signal-connected to the power domain controller and is used to cool the power battery, drive motor, motor controller and range extender. The battery information acquisition module is used to collect power battery information and send it to the power domain controller; the power battery information includes the battery SOC. The power domain controller is used to determine the current operating conditions based on the combined inertial navigation signal, the vehicle load power consumption, and the battery SOC, and dynamically adjust the range extender control strategy in advance for upcoming operating conditions.

[0027] In some embodiments, the engineering vehicle energy management system further includes an in-cab control switch, comprising: The road condition scanning switch is used to activate the road condition scanning mode to generate a two-dimensional query table of latitude and longitude-mining area operating conditions. The range extender economy mode switch is used to switch the range extender to "optimal fuel economy power mode".

[0028] Example 2: Based on Example 1, such as Figure 3 As shown in the embodiment of this application, a control method for the above-mentioned engineering vehicle energy management system is provided, including: When the vehicle is powered by high voltage, if the power domain controller has a two-dimensional lookup table of latitude and longitude and mining area operating conditions, and the vehicle speed is greater than 0, the current latitude and longitude will be obtained in real time. Based on the current latitude and longitude, and combined with the latitude and longitude-mining area operation condition query table, the current operation condition and the upcoming operation condition can be obtained; among which the operation conditions include flat road operation condition, long downhill operation condition, long uphill operation condition, short downhill operation condition or short uphill operation condition. The range extender control strategy is dynamically adjusted based on the current operating conditions, and the system is prepared to enter the operating conditions in advance.

[0029] It should be noted that the latitude and longitude-mining area operating condition two-dimensional lookup table is pre-stored in the power domain controller, and the method for constructing the latitude and longitude-mining area operating condition two-dimensional lookup table includes: When the vehicle speed is greater than 0 and the road condition scanning switch is turned on, the power domain controller receives the combined inertial navigation signal uploaded by the combined inertial navigation module and the total vehicle load power consumption uploaded by the load power acquisition module in real time. The current operating condition is determined by combining the combined inertial navigation signals and the power consumption of the vehicle load. A two-dimensional query table of latitude and longitude-mining area operating conditions is generated based on the current operating conditions and the corresponding latitude and longitude, and stored in the power domain controller.

[0030] Different range extender control strategies are developed for different operating conditions in the mining area.

[0031] like Figure 4 As shown, for flat road conditions, the range extender control strategy balances the dual objectives of minimizing overall vehicle energy consumption and ensuring safe braking of the electric motor. The range extender control strategy specifically includes: If the battery SOC is greater than the second charge value (e.g., 80%), the range extender is not in the power generation state, and the drive motor's recharge power is not greater than the recharge power threshold (battery allows 80% recharge power), then pure electric driving will be performed. If the battery SOC is greater than the second charge value (e.g., 80%), the range extender is not in the power generation state, and the drive motor recharge power is greater than the recharge power threshold (battery allows 80% feedback power), then the range extender will be started and enter the high-voltage reverse drag range extender power consumption mode, converting electrical energy into mechanical work, and finally into heat energy, to achieve the motor safety braking function. If the battery SOC is less than the first charge value (e.g., 20%) or the battery SOC is greater than the second charge value (e.g., 80%) and the range extender is in power generation mode, the target power generation of the range extender is set according to the power consumption of the vehicle load, and the range extender is started. The target power generation of the range extender is sent to the range extender controller to charge the power battery and supply power to the drive system. Among them, the target power generation of the range extender is set based on the power consumption of the vehicle load, including: If the total power consumption of the vehicle load is less than the first power consumption value (e.g., 5~10 kW), set the target power generation of the range extender to be equal to the optimal fuel-efficient charging power; If the power consumption is greater than the second power consumption value (e.g., 20% of the battery's allowable feedback power), the target power generation of the range extender is set to be equal to the sum of the optimal fuel-efficient charging power and the power consumption of the vehicle load. If the high-voltage components of the vehicle feed energy back to the battery system, the target power generation of the range extender is set to be equal to the difference between the optimal fuel-efficient charging power and the power consumption of the vehicle load.

[0032] During operation, the range extender control strategy under flat road conditions will monitor the battery SOC in real time. If the range extender charges the power battery to a level greater than the third charge value (e.g., 90%), the target power generation of the range extender will be set to the idle power generation power (e.g., 10 kW). Once the actual power generation of the range extender drops to the idle power generation power, the range extender will be turned off and pure electric driving will commence.

[0033] It should be noted that the third battery level > the second battery level > the first battery level. For example, the first battery level is 20%, the second battery level is 80%, and the third battery level is 90%.

[0034] like Figure 5 As shown, for long downhill driving conditions, the range extender control strategy achieves energy safety and efficient recovery, specifically including: After the operating condition switching module switches the engineering vehicle to the long downhill operating condition, the power domain controller will immediately start the core monitoring program. The primary detection target is the real-time power charge (SOC value) of the power battery. At the same time, it will simultaneously collect key parameters such as the current battery temperature, motor controller temperature, and drive motor recharge power to provide data support for subsequent control strategies.

[0035] If the battery SOC is less than the first charge value (e.g., 20%), the range extender is shut down, and the energy recovery intensity is adjusted to the highest level. (At this time, because the battery still has a large charge storage capacity, the system will prioritize the high-intensity energy recovery strategy: the power domain controller sends a command to the motor controller to adjust the energy recovery intensity to the highest level, efficiently capturing the gravitational potential energy and kinetic energy of the engineering vehicle when going downhill through reverse braking of the motor, converting it into electrical energy to continuously charge the power battery, and maximizing the replenishment of charge; at the same time, considering that the motor controller will generate more heat due to the increase in reverse current during the high-intensity energy recovery process, and the power battery will also experience a temperature rise due to the increase in charging current); and if at least one of the battery, motor, and motor controller temperatures exceeds the corresponding temperature threshold, the cooling system is switched to full-power operation mode—the cooling fan runs at the highest speed, and the coolant circulation pump works at full load, thereby enhancing heat exchange efficiency and stabilizing the battery, motor, and motor controller temperatures within the optimal operating range, avoiding the risk of component performance degradation or failure due to high temperature; If the battery SOC is greater than the second charge value (80%) and the recharge power of the drive motor is greater than the recharge power threshold (80% of the battery's allowable recharge power), (at this time, the battery's charge storage space is limited. If high-intensity recharge continues, it may lead to battery overcharging, voltage surge, or even overcurrent failure of the electric drive system), then the range extender will be activated and enter the high-voltage reverse drag range extender power consumption mode. The range extender is linked with the electric drive system through the transmission mechanism, using its own operation to consume part of the recharge energy, reducing the actual power delivered by the drive system to the battery, so that the recharge power is stabilized within the safe range allowed by the battery. At the same time, it works in conjunction with the dynamic adjustment of the cooling system (adjusting the heat dissipation power according to the temperature of the battery, motor, and motor controller) to ensure that the power battery and electric drive system are always in a safe and reliable operating state throughout the entire motor braking regeneration process, avoiding energy waste and eliminating safety hazards.

[0036] like Figure 6 As shown, for short downhill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value (20%), the range extender maintains idle power generation and adjusts the energy recovery intensity to a moderate level. If the battery SOC is greater than the second charge value (80%), and the drive motor recharge power is greater than the recharge power threshold (battery allowable feedback power 80%), then the range extender will start and enter the high-voltage reverse drag range extender power consumption mode.

[0037] The difference between short and long downhill driving conditions is that when the battery charge is low, the range extender maintains idle power generation to ensure that the range extender is not in a frequent start-stop state. At the same time, the energy recovery intensity is adjusted to a moderate level. The kinetic / gravitational potential energy accumulation of engineering vehicles on this road section is limited. If the highest intensity energy recovery is activated, there may be excessive braking performance and safety risks. The highest intensity energy recovery corresponds to a stronger reverse braking force. Strong recovery may cause the vehicle to decelerate sharply, affecting the subsequent acceleration efficiency on flat roads (requiring additional energy consumption to compensate for acceleration).

[0038] Under long uphill driving conditions, engineering vehicles need to continuously overcome significant gradient resistance, placing high demands on power output stability and energy economy. Therefore, the range extender control strategy is centered on "adaptive power adjustment," balancing overall vehicle energy efficiency with sufficient power. Figure 7 As shown, for long uphill driving conditions, the range extender control strategy includes: Once the operating condition switching module confirms that the engineering vehicle has entered a long uphill operating condition, it first performs the "range extender pre-start" operation: directly starts the range extender and sets the target power generation of the range extender to the idle power generation. The core purpose of this step is to avoid the delay caused by the range extender starting from the stop state when the power demand surges later, to ensure timely power response, and at the same time to reserve a stable operating foundation for subsequent power adjustment and prevent the impact of starting shock on the life of the power system.

[0039] Once the range extender's actual power generation reaches its idle power generation, the power domain controller adjusts the range extender's target power generation based on the battery's state of charge (SOC). If the battery SOC is less than the first charge level (20%), the range extender's target power output is set to equal the range extender's maximum power (the range extender switches to "full power output mode," covering the climbing power plus charging the battery). At this point, the remaining battery charge is insufficient to meet the high power demands of long uphill climbs. Relying solely on battery power could easily lead to power interruption or over-discharge damaging the battery. Therefore, the range extender immediately switches to "full power output mode," where its power output must not only cover the climbing power consumption of the drive system but also simultaneously charge the battery, ensuring that the battery SOC remains within a safe range and preventing the continuous decrease in charge from affecting the power supply for subsequent operating conditions.

[0040] If the battery's State of Charge (SOC) is between the first charge level (20%) and the third charge level (90%), the range extender's target power generation is set to be equal to the optimal fuel-efficient charging power (the range extender switches to "optimal fuel-efficient power mode"). At this time, the battery has a certain power supply capacity, and the range extender does not need to operate at full power. The range extender then switches to "optimal fuel-efficient power mode," with the power generation set to the range with the lowest fuel consumption. In this mode, the range extender's output power and the battery's discharge power work together to meet the power requirements for climbing, avoiding fuel waste caused by high-load operation of the range extender and preventing excessive battery discharge, achieving a balance between "meeting power targets" and "optimal energy consumption."

[0041] like Figure 8 As shown, for short uphill driving conditions, the range extender control strategy includes: After switching to short uphill driving mode, the power domain controller reads the real-time battery SOC of the power battery and performs differentiated control based on the calibrated SOC threshold zone: If the battery SOC is less than the first charge value (20%), the range extender is activated, and the target power output of the range extender is set to equal the maximum power output of the range extender (the range extender switches to "full power output mode"); the range extender operates at full power to ensure power and battery safety. In this range, if the battery charge is insufficient, the range extender must take the lead in power supply. The core strategy is "full power output + battery recharge protection": the range extender is activated and runs at full power to prioritize the power demand for short uphill sections, while simultaneously recharging the battery.

[0042] If the battery's State of Charge (SOC) is between the first (20%) and third (90%) charge values, it operates on pure electric power with dynamic power limiting. If the vehicle's load power consumption exceeds the limit (greater than 100% of the battery's allowable discharge power), the drive system's power output is temporarily limited. Pure electric drive takes priority to reduce fuel consumption. Within this range, the battery has sufficient remaining charge to meet the instantaneous power demand for short uphill climbs. The core strategy is "pure electric drive + dynamic power limiting": the battery supplies power to the drive motor to meet the power demand for short uphill climbs. If the actual power consumption exceeds the limit, the drive system's power output is temporarily limited to prevent battery overcurrent damage. Specifically, the third power consumption value > the second power consumption value > the first power consumption value.

[0043] In some embodiments, a predictive and adaptive control strategy is adopted for different working condition transition scenarios of engineering vehicles, specifically including: If the current operating condition is a flat road condition, and the operating condition is to be a long downhill condition, the operating condition switching module will switch to the long downhill condition in advance. If the battery SOC is less than the first charge value, the energy recovery intensity will be adjusted to the highest level, and the power battery will be charged by the reverse braking of the motor to maximize the recovery of gravitational potential energy. If the current operating condition is flat road condition, and the operating condition is about to be long uphill condition, the operating condition switching module will switch to long uphill condition in advance. If the battery SOC is less than the first charge value, the range extender will start to run at full power in advance to ensure sufficient power. If the current operating condition is a short downhill condition, and the operating condition is to be a short uphill condition, the operating condition switching module will switch to the short uphill condition in advance, and reduce the energy recovery intensity and let the range extender idle power generation standby. If the current operating condition is a long downhill condition, the operating condition will be changed to a flat road condition in advance. The operating condition switching module will switch to the flat road condition in advance and reduce the energy recovery intensity and the recharge power of the drive motor to avoid excessively low vehicle speed on flat roads and additional power consumption during subsequent acceleration, thus balancing efficiency and energy consumption.

[0044] Example 3: Based on Example 1, this application also provides an engineering vehicle, which is equipped with the above-mentioned engineering vehicle energy management system and executes the control method of the engineering vehicle energy management system described in Example 2.

[0045] In some embodiments, the engineering vehicles include, but are not limited to, range-extended mining trucks.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control method for an energy management system of an engineering vehicle, characterized in that, The engineering vehicle energy management system includes: a load power acquisition module for acquiring the vehicle's load power consumption and sending it to the power domain controller; a combined inertial navigation module for acquiring the vehicle's combined inertial navigation signals and sending them to the power domain controller; wherein the combined inertial navigation signals include the vehicle's real-time latitude and longitude and vehicle attitude information; a cooling system, including a water pump and a cooling fan, connected to the power domain controller for cooling the power battery, drive motor, motor controller, and range extender; a battery information acquisition module for acquiring power battery information and sending it to the power domain controller; wherein the power battery information includes the battery's state of charge (SOC); and a power domain controller for determining the current operating condition based on the combined inertial navigation signals, the vehicle's load power consumption, and the battery's SOC, dynamically adjusting the range extender control strategy, and preemptively entering the upcoming operating condition; the control method includes: When the vehicle is powered by high voltage, if the power domain controller has a two-dimensional lookup table of latitude and longitude and mining area operating conditions, and the vehicle speed is greater than 0, the current latitude and longitude will be obtained in real time. Based on the current latitude and longitude, the current operating conditions and upcoming operating conditions can be obtained by referring to the latitude and longitude-mining area operating condition query table; among which the operating conditions include flat road conditions, long downhill conditions, long uphill conditions, short downhill conditions, or short uphill conditions. The range extender control strategy is dynamically adjusted based on the current operating conditions, and the system is preemptively activated for upcoming operating conditions. Specifically, for flat road conditions, the range extender control strategy includes: If the battery SOC is greater than the second charge value, the range extender is not in the power generation state, and the recharge power of the drive motor is not greater than the recharge power threshold, then pure electric driving will be carried out. If the battery SOC is greater than the second charge value, the range extender is not in the power generation state, and the recharge power of the drive motor is greater than the recharge power threshold, the range extender will be started and enter the high-voltage reverse drag range extender power consumption mode to achieve safe braking of the motor. If the battery SOC is less than the first charge value or the battery SOC is greater than the second charge value and the range extender is in the power generation operation state, the target power generation power of the range extender is set according to the power consumption of the vehicle load, and the range extender is started. The target power generation power of the range extender is sent to the range extender controller to charge the power battery and supply power to the drive system. Among them, the target power generation of the range extender is set based on the power consumption of the vehicle load, including: If the total power consumption of the vehicle load is less than the first power consumption value, the target power generation of the range extender is set to be equal to the optimal fuel-efficient charging power. If the total power consumption of the vehicle load is greater than the second power consumption value, the target power generation of the range extender is set to be equal to the sum of the optimal fuel economy charging power and the total power consumption of the vehicle load; the second power consumption value is greater than the first power consumption value. If the high-voltage components of the vehicle feed energy back to the battery system, the target power generation of the range extender is set to be equal to the difference between the optimal fuel-efficient charging power and the power consumption of the vehicle load. During operation, the range extender control strategy under flat road conditions will monitor the battery SOC in real time. If the range extender charges the power battery to a level where the battery SOC is greater than the third charge value, the target power generation of the range extender will be set to the idle power generation. Once the actual power generation of the range extender drops to the idle power generation, the range extender will be turned off and pure electric driving will be performed. Among them, the third power value > the second power value > the first power value.

2. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, The energy management system for the engineering vehicle also includes an in-cab control switch, which includes: The road condition scanning switch is used to activate the road condition scanning mode to generate a two-dimensional query table of latitude and longitude-mining area operating conditions. The range extender economy mode switch is used to switch the range extender to the optimal fuel economy power mode.

3. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, The method for constructing the latitude and longitude-mining area operation status two-dimensional query table includes: When the vehicle speed is greater than 0 and the road condition scanning switch is turned on, the power domain controller receives the combined inertial navigation signal uploaded by the combined inertial navigation module and the total vehicle load power consumption uploaded by the load power acquisition module in real time. The current operating condition is determined by combining the combined inertial navigation signals and the power consumption of the vehicle load. A two-dimensional query table of latitude and longitude-mining area operating conditions is generated based on the current operating conditions and the corresponding latitude and longitude, and stored in the power domain controller.

4. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, For long downhill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, the range extender is turned off and the energy recovery intensity is adjusted to the highest level; and if at least one of the battery, motor, and motor controller temperatures is greater than the corresponding temperature threshold, the cooling system is switched to full power operation mode—the cooling fan runs at the highest speed, the coolant circulation pump works at full load, and the battery, motor, and motor controller temperatures are stabilized within the optimal operating range. If the battery SOC is greater than the second charge value and the drive motor recharge power is greater than the recharge power threshold, the range extender will start and enter the high-voltage reverse drag range extender power consumption mode.

5. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, For short downhill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, the range extender maintains idle power generation and adjusts the energy recovery intensity to a moderate level. If the battery SOC is greater than the second charge value and the drive motor recharge power is greater than the recharge power threshold, the range extender will start and enter the high-voltage reverse drag range extender power consumption mode.

6. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, For long uphill driving conditions, the range extender control strategy includes: Once the working condition switching module confirms that the engineering vehicle has entered the long uphill working condition, it first performs the range extender pre-start operation: directly starts the range extender and sets the target power generation of the range extender to the idle power generation. Once the range extender's actual power generation reaches its idle power generation, the power domain controller adjusts the range extender's target power generation based on the battery's state of charge (SOC). If the battery SOC is less than the first charge value, the target power generation of the range extender is set to be equal to the maximum power of the range extender. If the battery SOC is between the first and third charge values, the target power output of the range extender is set to be equal to the optimal fuel-efficient charging power.

7. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, For short uphill driving conditions, the range extender control strategy includes: If the battery SOC is less than the first charge value, start the range extender and set the target power generation of the range extender to be equal to the maximum power of the range extender; If the battery SOC is between the first and third charge values, pure electric driving will be performed. If the power consumption of the vehicle load exceeds the limit, the power output of the drive system will be temporarily restricted.

8. The control method for the energy management system of engineering vehicles according to claim 1, characterized in that, For engineering vehicles undergoing different operating conditions and transitional scenarios, advance prediction and adaptive control strategies are adopted, including: If the current operating condition is a flat road condition, and the operating condition is to be a long downhill condition, the operating condition switching module will switch to the long downhill condition in advance. If the battery SOC is less than the first charge value, the energy recovery intensity will be adjusted to the highest level, and the power battery will be charged by the reverse braking of the motor to maximize the recovery of gravitational potential energy. If the current operating condition is flat road condition, and the operating condition is about to be long uphill condition, the operating condition switching module will switch to long uphill condition in advance. If the battery SOC is less than the first charge value, the range extender will start to run at full power in advance. If the current operating condition is a short downhill condition, and the operating condition is to be a short uphill condition, the operating condition switching module will switch to the short uphill condition in advance, and reduce the energy recovery intensity and let the range extender idle power generation standby. If the current operating condition is a long downhill slope, the operating condition will be changed to a flat road condition. The operating condition switching module will switch to the flat road condition in advance and reduce the energy recovery intensity and the recharge power of the drive motor.

9. An engineering vehicle, characterized in that, The engineering vehicle implements the control method of the engineering vehicle energy management system according to any one of claims 1-8.

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