A shutdown control method and system for a hybrid mine car range extender

Abstract

The present invention relates to the technical field of hybrid mine cars, and discloses a shutdown control method and system for a hybrid mine car range extender, the method comprising: when the battery SOC data of the mine car reaches a preset safety threshold, generating and sending an engine shutdown signal; based on the engine shutdown signal, combined with the current engine temperature of the mine car, executing a corresponding load control strategy to reduce the engine load power; by reducing the engine load power level to idle operation, combined with a preset idle control strategy to reduce the engine temperature; based on real-time battery SOC data, dynamically adjusting the output power of the generator through a preset adjustment strategy; monitoring and confirming engine shutdown, and recording the state information of the mine car when it is shut down to facilitate subsequent startup. The present invention realizes intelligent control of the hybrid mine car during the shutdown control process by comprehensively considering the battery state, engine temperature and mine car operating conditions, and improves the reliability and safety of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid power mining vehicles, and in particular to a shutdown control method and system for a hybrid power mining vehicle range extender. Background Art

[0002] With the enhancement of environmental awareness and the optimization of energy structure, hybrid mine cars have been widely used in the field of mine transportation due to their low emissions and high efficiency. Hybrid mine cars are usually equipped with battery packs and generators. Through the coordinated work of batteries and engines, efficient power output and energy management are achieved. However, battery charge and discharge management is one of the key technologies in hybrid systems. Improper charging and discharging strategies will not only affect the service life of the battery, but may also cause safety hazards.

[0003] In existing hybrid mining vehicles, battery charging management mainly relies on fixed charging strategies, which lack comprehensive consideration of multiple parameters such as battery status (such as SOC), engine temperature, and charging current. This single charging strategy often cannot effectively prevent battery overcharging or undercharging, and it is also easy to cause sudden changes in engine temperature during shutdown, affecting the service life of the engine. Therefore, a more intelligent and reliable shutdown control method is needed to solve these problems. Summary of the invention

[0004] In view of this, the present invention proposes a shutdown control method and system for a hybrid mine car range extender. By comprehensively considering the battery status, engine temperature and mine car operating conditions, refined management and intelligent control of the hybrid mine car during the shutdown control process are achieved, thereby improving the reliability and safety of the system.

[0005] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a shutdown control method for a hybrid mining vehicle range extender, comprising:

[0006] When the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent;

[0007] Based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power;

[0008] By reducing the engine load power level to idle operation, combined with a preset idle control strategy, the engine temperature is reduced;

[0009] Based on the real-time battery SOC data, dynamically adjust the output power of the generator through a preset adjustment strategy;

[0010] Monitor and confirm the engine shutdown, and record the status information of the mining vehicle when the engine is shut down.

[0011] Preferably, when the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent, specifically:

[0012] Acquire the battery SOC data of the mining vehicle in real time and compare it with the preset safety threshold;

[0013] The safety threshold comprises a minimum threshold and a maximum threshold, and both the minimum threshold and the maximum threshold are within the SOC operating range of the battery;

[0014] When the battery SOC data of the mining vehicle reaches the minimum threshold or the maximum threshold, an engine stop signal is generated and sent;

[0015] Whether to immediately perform a shutdown operation is determined based on the current operating conditions of the mine car, wherein the operating conditions include vehicle load, travel speed, and slope.

[0016] Preferably, based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power, specifically:

[0017] Real-time monitoring of the engine temperature of the mining vehicle, wherein the engine temperature includes water temperature and oil temperature;

[0018] Based on the engine shutdown signal, obtaining a current power level of the engine;

[0019] Through the load control strategy, the current power level of the engine is controlled to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power.

[0020] Preferably, the load control strategy is used to control the current power level of the engine to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power, specifically:

[0021] Controlling the current power level of the engine to be reduced to preset low load levels in sequence, wherein the preset low load levels include a first low load level and a second low load level, and the first low load level is greater than the second low load level;

[0022] The duration of each low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power to the idle level.

[0023] Preferably, the duration of each low load level is determined in combination with the real-time water temperature and the oil temperature, specifically:

[0024] If the water temperature and / or the oil temperature exceeds a first temperature threshold when the temperature is reduced to the first low load level, the preset duration is extended to determine a first duration of the first low load level;

[0025] If the water temperature and / or the oil temperature is lower than a second temperature threshold when the temperature is reduced to the first low load level, the preset duration is shortened to determine a first duration of the first low load level;

[0026] If the water temperature and / or the oil temperature exceeds a second temperature threshold when the load level is reduced to the second low load level, the preset duration is extended to determine a second duration;

[0027] If the water temperature and / or the oil temperature is lower than a third temperature threshold when the load level is reduced to the second low load level, the preset duration is shortened to determine a second duration;

[0028] The first temperature threshold is higher than the second temperature threshold, and the second temperature threshold is higher than the third temperature threshold.

[0029] Preferably, the engine temperature is further reduced by reducing the engine load power level to idle operation in combination with a preset idle control strategy, specifically:

[0030] When the engine load power level is reduced to idle operation, the duration of the idle operation is determined in combination with the real-time water temperature and the oil temperature;

[0031] If the water temperature and / or the oil temperature is lower than the preset idle temperature threshold, continue idling for 2 to 3 minutes;

[0032] If the water temperature and / or the oil temperature is higher than a preset idle temperature threshold, the idle operation is continued for 4 to 5 minutes.

[0033] Preferably, based on the real-time battery SOC data, the output power of the generator is dynamically adjusted through a preset adjustment strategy, specifically:

[0034] Monitor the charging state of the battery and obtain the battery SOC data in real time;

[0035] When the battery SOC data approaches the maximum threshold, gradually reducing the power generation of the generator to prevent the battery from being overcharged;

[0036] When the battery SOC data approaches the minimum threshold, the power generation of the generator is gradually increased to prevent the battery from being undercharged.

[0037] Preferably, the engine shutdown is monitored and confirmed, and the status information of the mining vehicle during the shutdown is recorded to facilitate subsequent startup, specifically:

[0038] When the engine speed drops below the idle speed and lasts for more than 3 seconds, it is confirmed that the engine has stopped;

[0039] The state information of the mine car during the shutdown is recorded to adjust the preheating time and starting current at the next startup, wherein the state information of the mine car includes the shutdown time, vehicle load data, driving speed, and slope.

[0040] Preferably, the state information of the mining vehicle during the shutdown is recorded to adjust the preheating time and starting current during the next startup, specifically:

[0041] The preheating time is prolonged as the downtime is prolonged;

[0042] The starting current increases with the increase of any one of the vehicle load data, the driving speed and the slope.

[0043] In a second aspect, the present invention provides a shutdown control system for a hybrid mining vehicle range extender, comprising:

[0044] A shutdown detection module, used to generate and send an engine shutdown signal when the battery SOC data of the mining vehicle reaches a preset safety threshold;

[0045] A load control module, configured to execute a corresponding load control strategy based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle to reduce the engine load power;

[0046] An idle speed control module, configured to further reduce the engine temperature by reducing the engine load power level to idle speed operation in combination with a preset idle speed control strategy;

[0047] A battery management module, used to dynamically adjust the output power of the generator through a preset adjustment strategy based on the real-time battery SOC data;

[0048] The recording and analysis module is used to monitor and confirm the shutdown of the engine and record the status information of the mining vehicle when the engine is shut down to facilitate subsequent startup.

[0049] The embodiment of the present application discloses a shutdown control method and system for a hybrid mine car range extender. The method sets a reasonable SOC safety threshold and automatically triggers an engine shutdown signal when these thresholds are reached, effectively avoiding the risk of battery overcharging or undercharging, and improving the battery life and the safety of the overall system; based on the engine shutdown signal and the current engine temperature, the corresponding load control strategy is executed, and the engine load power can be gradually reduced until idling, which helps to reduce the mechanical stress that may be generated by the engine due to sudden load reduction, thereby protecting the engine from damage; by real-time monitoring of the battery SOC and adjusting the output power of the generator accordingly, the reasonable allocation of power resources is achieved, which not only guarantees the power supply required for system operation, but also avoids unnecessary energy waste; recording detailed status information at the time of shutdown not only helps to analyze the cause of the shutdown, but also provides a reference for the next startup, and by appropriately adjusting the preheating time and starting current, the mine car can be restored to normal working state in the shortest time, improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0051] Figure 1 A flowchart of a shutdown control method for a hybrid mining vehicle range extender provided by an embodiment of the present invention;

[0052] Figure 2 A schematic structural diagram of a shutdown control system of a hybrid mining vehicle range extender provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] like Figure 1 As shown, in some embodiments of the present application, this embodiment provides a shutdown control method for a hybrid mining vehicle range extender. Specifically, the method includes the following steps:

[0055] Step S101: When the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent.

[0056] As mentioned above, during the operation of the hybrid mine car, the battery's state of charge (SOC) is a key parameter used to evaluate the remaining battery power. In order to ensure the safety and life of the battery, one or more safety thresholds need to be set. When the mine car's battery SOC data reaches these preset safety thresholds, the system automatically generates and sends an engine shutdown signal to ensure the safety of the battery and the entire system.

[0057] For example, if the battery SOC safety threshold of a hybrid mine car is set to a minimum threshold of 20% and a maximum threshold of 80%, the system will monitor the battery SOC data in real time during the operation of the mine car. When the battery SOC drops to 20%, the system will generate an engine shutdown signal to prompt the operator or automatically control the mine car to enter a low-power mode to prevent excessive discharge of the battery; when the battery SOC rises to 80%, the system will also generate an engine shutdown signal to prompt the operator or automatically control the mine car to reduce power generation to prevent overcharging of the battery.

[0058] It should be noted that in a specific implementation scenario, a multi-level threshold setting scheme can be adopted on the basis of the above scheme, that is, in addition to the basic minimum threshold, a stricter secondary threshold can be set. When the battery SOC drops to these secondary thresholds, the system can take different response measures, such as reducing load power, limiting certain functions or shutting down completely; in addition to the basic maximum threshold, a looser secondary threshold can be set. When the battery SOC rises to these secondary thresholds, the system can gradually reduce the power generation to smoothly transition to normal operation. A dynamic threshold adjustment scheme is adopted, that is, the system can dynamically adjust the safety threshold according to the working environment of the mine car (such as temperature, humidity, altitude, etc.). For example, in a high temperature environment, the maximum threshold can be appropriately lowered to prevent the battery from overheating; in a low temperature environment, the minimum threshold can be appropriately increased to prevent the battery performance from deteriorating. The above optional schemes all belong to the protection scope of this application.

[0059] Step S102: Based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power.

[0060] As mentioned above, after receiving the engine shutdown signal, the system not only needs to reduce the engine load power, but also needs to implement a specific load control strategy in combination with the current engine temperature of the mining vehicle. This is because the engine temperature directly affects its operating status and life. By comprehensively considering the engine shutdown signal and engine temperature, the engine load power can be controlled more accurately to avoid mechanical damage or other problems caused by excessively high or low temperatures.

[0061] For example, suppose the engine temperature safety range of a hybrid mining car is 60°C to 90°C. During the operation of the mining car, the system will monitor these temperature data in real time and execute the corresponding load control strategy after receiving the engine shutdown signal. For example, when the battery SOC drops to the preset minimum threshold of 20%, the system generates and sends an engine shutdown signal; the system monitors the engine temperature in real time at 80°C and determines that it is within the safe range; the system gradually reduces the engine load power from the current high load level (for example, 100%) to the low load level (for example, 50%), and continuously monitors temperature changes.

[0062] It should be noted that in a specific implementation scenario, a multi-stage load control scheme can be adopted on the basis of the above scheme, that is, the system can divide the load control into multiple stages, and each stage gradually reduces the load power according to the current engine temperature. For example, three stages can be set, the first stage is reduced from 100% to 70%, the second stage is reduced from 70% to 50%, and the third stage is reduced from 50% to 30%; in each stage, the system can monitor the temperature of the engine in real time and adjust the load reduction speed according to the temperature feedback. If the temperature drops quickly, the load reduction speed can be appropriately slowed down; if the temperature drops slowly, the load reduction speed can be accelerated. A temperature threshold refinement scheme is adopted, that is, in addition to the basic safety temperature range, more levels of temperature thresholds can be set to more finely control the load power; the system can dynamically adjust the temperature threshold according to the current working conditions of the mine car (such as load, driving speed, slope, etc.). For example, under high load conditions, the temperature threshold can be appropriately increased to prevent the engine from overheating. The above optional schemes all belong to the protection scope of this application.

[0063] Step S103, reducing the engine load power level to idle operation, combined with a preset idle control strategy, to reduce the engine temperature.

[0064] As mentioned above, after receiving the engine shutdown signal and executing the preliminary load control strategy, the system will further reduce the engine load power to enter the idle operation state. Idle operation means that the engine runs at the lowest stable speed, at which time the engine load power is very low, and the main purpose is to maintain the necessary system functions and cooling requirements. Combined with the preset idle control strategy, the system can more effectively reduce the engine temperature and prevent overheating caused by long-term high-load operation.

[0065] For example, suppose the engine of a hybrid mining car is running under high load. After receiving the engine shutdown signal, the system executes a preliminary load control strategy to reduce the load power from 100% to 50%, but the engine temperature is still high. Next, the system further reduces the engine's load power to the idle level, and the engine speed drops to 800 rpm. In the idle state, the engine's load power is significantly reduced to only about 10% of the total power. The system monitors the engine's water temperature and oil temperature in real time, and determines the idle operation time according to the preset idle control strategy. If the water temperature and oil temperature are still at a high level, the system will extend the idle time; if the temperature has dropped to a safe range, the system can appropriately shorten the idle time.

[0066] It should be noted that in a specific implementation scenario, a multi-level idle control scheme can be adopted on the basis of the above scheme, that is, the system can set multiple idle speed levels and select a suitable idle speed according to the current temperature of the engine. If the temperature is high, a lower idle speed can be selected. Conversely, a higher idle speed can be selected to balance the cooling effect and fuel consumption; a temperature threshold refinement scheme can be adopted, that is, the system can set multiple temperature thresholds to more finely control the idle time. During the idle operation, the system can monitor the temperature changes in real time and adjust the idle time according to the temperature feedback. The above optional schemes all fall within the protection scope of this application.

[0067] Step S104: dynamically adjusting the output power of the generator through a preset adjustment strategy based on the real-time battery SOC data.

[0068] As mentioned above, during the operation of the hybrid mining car, the battery SOC value is an important parameter that affects the system performance and safety. In order to ensure the health of the battery and the stable operation of the system, the system needs to monitor the battery SOC data in real time and dynamically adjust the output power of the generator based on this data. In this way, the battery can be prevented from being overcharged or undercharged, while optimizing energy utilization efficiency. Specifically, the system will automatically increase or decrease the output power of the generator according to the current SOC value of the battery based on the preset adjustment strategy to maintain the battery SOC within a reasonable range.

[0069] For example, suppose the battery SOC safety range of a hybrid mining car is 20% to 80%. During the operation of the mining car, the system will monitor the battery SOC data in real time and dynamically adjust the output power of the generator based on this data. For example, when the battery SOC drops to 25%, the system detects that the SOC is close to the minimum threshold of 20%, and the system automatically increases the output power of the generator to accelerate battery charging and prevent battery undercharging; when the battery SOC rises to 75%, the system detects that the SOC is close to the maximum threshold of 80%, and the system automatically reduces the output power of the generator to slow down the battery charging speed and prevent battery overcharging.

[0070] It should be noted that in a specific implementation scenario, a multi-level adjustment strategy can be adopted on the basis of the above scheme, that is, the system can set multiple power adjustment levels and select the appropriate generator output power according to different intervals of the battery SOC; the system can adopt a progressive adjustment strategy, and when the battery SOC is close to the threshold, the output power of the generator is gradually adjusted, rather than a one-time large adjustment, to reduce the impact on the system. An intelligent prediction and optimization scheme is adopted, that is, the system can integrate an intelligent prediction model to predict the future SOC change trend according to the current battery SOC, mine car load, driving speed and other factors, and adjust the output power of the generator in advance; the system can use optimization algorithms, such as genetic algorithms, particle swarm optimization algorithms, etc., to find the optimal generator output power adjustment scheme to maximize energy utilization and optimize system performance. The above optional schemes all fall within the scope of protection of this application.

[0071] Step S105, monitoring and confirming that the engine is shut down, and recording the status information of the mining vehicle when the engine is shut down.

[0072] As mentioned above, after executing the load regulation and idle control strategies, the system needs to monitor and confirm whether the engine has been successfully shut down. Once the engine is confirmed to be shut down, the system will record various status information of the mine car during the shutdown, including shutdown time, vehicle load data, driving speed, slope, etc. This information is very important for subsequent startup and system recovery, and can help the system make more reasonable decisions at the next startup, such as adjusting the preheating time and starting current, thereby improving startup efficiency and system performance.

[0073] For example, suppose a hybrid mine car is running and the system detects that the battery SOC drops to 20%, triggering an engine shutdown signal. After the system executes a series of load regulation and idle control strategies, it needs to confirm whether the engine has stopped and record relevant status information. The system monitors the engine speed in real time through sensors. When the engine speed drops below the idle speed and lasts for more than 3 seconds, the system confirms that the engine has stopped and records the specific time of the engine shutdown, the load of the mine car, the driving speed of the mine car, and the slope of the mine car. According to the length of the downtime, the system adjusts the preheating time at the next start. For example, if the downtime is long, the preheating time can be appropriately extended; according to the vehicle load data, driving speed and slope at the time of the shutdown, the system adjusts the starting current at the next start. For example, if the mine car is under high load or uphill when it is stopped, the starting current can be appropriately increased.

[0074] It should be noted that in a specific implementation scenario, a multi-sensor fusion solution can be adopted on the basis of the above solution, that is, the system can integrate multiple sensors, such as speed sensors, temperature sensors, pressure sensors, etc., and improve the accuracy and reliability of shutdown confirmation through multi-sensor fusion technology; in order to ensure the accuracy of the monitoring results, the system can adopt a redundant design, that is, install the same sensor in multiple locations, and ensure the reliability of shutdown confirmation by comparing the data of different sensors. An intelligent diagnosis and analysis solution is adopted, that is, the system has a fault diagnosis function. When it is detected that the engine fails to shut down successfully, the fault diagnosis program is automatically triggered to find and record the cause of the fault, such as sensor failure, control module failure, etc.; the system can record detailed data for each shutdown and startup, and identify potential problems and optimization points through data analysis tools to improve the overall performance of the system. The above optional solutions all fall within the scope of protection of this application.

[0075] In some embodiments of the present application, in order to monitor the battery SOC data in real time and generate an engine shutdown signal when the safety threshold is reached, the safe and stable operation of the mining car is ensured. When the battery SOC data of the mining car reaches a preset safety threshold, an engine shutdown signal is generated and sent, specifically:

[0076] Acquire the battery SOC data of the mining vehicle in real time and compare it with the preset safety threshold;

[0077] The safety threshold comprises a minimum threshold and a maximum threshold, and both the minimum threshold and the maximum threshold are within the SOC operating range of the battery;

[0078] When the battery SOC data of the mining vehicle reaches the minimum threshold or the maximum threshold, an engine stop signal is generated and sent;

[0079] Whether to immediately perform a shutdown operation is determined based on the current operating conditions of the mine car, wherein the operating conditions include vehicle load, travel speed, and slope.

[0080] As described above, the system obtains the SOC data of the mine car battery in real time through sensors, and compares the real-time battery SOC data with the preset safety threshold to determine whether the battery SOC has reached the safety threshold. The preset safety threshold includes a minimum threshold and a maximum threshold. The minimum threshold is used to prevent the battery from being undercharged, and the maximum threshold is used to prevent the battery from being overcharged. Both thresholds are within the normal operating range of the battery to ensure that the battery operates within a safe range. If the real-time battery SOC data reaches the minimum threshold or the maximum threshold, the system will generate an engine shutdown signal, which will be sent to the control system of the mine car to indicate that the mine car is ready to stop. The system will determine whether to perform the shutdown operation immediately based on the current working conditions of the mine car, including but not limited to the vehicle load, driving speed and slope. For example, if the mine car is going uphill or has a large load, the system may delay the shutdown operation to ensure the safe and stable operation of the mine car; if the mine car is under low load, driving at a low speed and with a small slope, the system will immediately perform the shutdown operation.

[0081] In some embodiments of the present application, in order to gradually reduce the load power of the engine, ensure that the engine operates within a safe range, and effectively reduce the engine temperature. Based on the engine shutdown signal, combined with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power, specifically:

[0082] Real-time monitoring of the engine temperature of the mining vehicle, wherein the engine temperature includes water temperature and oil temperature;

[0083] Based on the engine shutdown signal, obtaining a current power level of the engine;

[0084] Through the load control strategy, the current power level of the engine is controlled to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power.

[0085] As mentioned above, the system monitors the water temperature and oil temperature of the mine car engine in real time through sensors. The water temperature refers to the water temperature of the engine cooling system, and the oil temperature refers to the oil temperature of the engine lubrication system. When the system receives the engine shutdown signal, it obtains the current engine power level. The power level refers to the current output power of the engine, usually expressed as a percentage, for example, 100% means full load operation, and 50% means half load operation. According to the preset load control strategy, the system gradually reduces the current engine power level to a preset low load level. The preset low load level can be a fixed value or a value dynamically adjusted according to the current working conditions. Combined with the real-time monitored water temperature and oil temperature, the system determines the duration of the low load level. If the water temperature and oil temperature are high, the system will extend the duration of the low load level to fully reduce the engine temperature; if the water temperature and oil temperature are low, the system will shorten the duration of the low load level to reduce unnecessary energy waste.

[0086] In some embodiments of the present application, in order to gradually reduce to the idle level, the duration of each low load level is dynamically adjusted according to the real-time temperature data to ensure that the engine temperature is effectively controlled and the engine is protected from overheating damage. Through the load control strategy, the current power level of the engine is controlled to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power, specifically:

[0087] Controlling the current power level of the engine to be reduced to preset low load levels in sequence, wherein the preset low load levels include a first low load level and a second low load level, and the first low load level is greater than the second low load level;

[0088] The duration of each low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power to the idle level.

[0089] As described above, after receiving the engine shutdown signal, the system begins to gradually reduce the power level of the engine. The preset low load level is divided into two stages: the first low load level and the second low load level. The first low load level is usually set to a higher low load value; the second low load level is usually set to a lower low load value. The system first reduces the engine power from the current level to the first low load level, and then reduces it from the first low load level to the second low load level. In each low load level stage, the system monitors the water temperature and oil temperature of the engine in real time. According to the real-time monitored water temperature and oil temperature, the system determines the duration at each low load level. If the water temperature and oil temperature are high, the system will extend the duration at the low load level to ensure that the temperature gradually decreases; if the water temperature and oil temperature are low, the system will shorten the duration at the low load level to reduce unnecessary energy waste. By gradually reducing the load power of the engine and combining temperature monitoring, the load power of the engine is finally reduced to the idle level to ensure that the engine operates within a safe range.

[0090] In some embodiments of the present application, in order to dynamically adjust the duration at different low load levels according to the real-time monitored water temperature and oil temperature, ensure that the engine temperature is effectively controlled, protect the engine from overheating damage, and optimize energy efficiency. Combined with the real-time water temperature and the oil temperature, the duration of each low load level is determined, specifically:

[0091] If the water temperature and / or the oil temperature exceeds a first temperature threshold when the temperature is reduced to the first low load level, the preset duration is extended to determine a first duration of the first low load level;

[0092] If the water temperature and / or the oil temperature is lower than a second temperature threshold when the temperature is reduced to the first low load level, the preset duration is shortened to determine a first duration of the first low load level;

[0093] If the water temperature and / or the oil temperature exceeds a second temperature threshold when the load level is reduced to the second low load level, the preset duration is extended to determine a second duration;

[0094] If the water temperature and / or the oil temperature is lower than a third temperature threshold when the load level is reduced to the second low load level, the preset duration is shortened to determine a second duration;

[0095] The first temperature threshold is higher than the second temperature threshold, and the second temperature threshold is higher than the third temperature threshold.

[0096] As described above, when the engine power is reduced to the first low load level, the system monitors the water temperature and oil temperature of the engine in real time. If the water temperature or the oil temperature exceeds the first temperature threshold, the preset duration is extended, and the preset duration refers to the default duration preset by the system at the first low load level. The extended duration can be 1.5 times or 2 times of the preset time, ensuring that the engine temperature has enough time to drop to a safe range; if the water temperature or the oil temperature is lower than the second temperature threshold, the preset duration is shortened, and the shortened duration can be 0.5 times or 0.75 times of the preset time, ensuring that unnecessary energy waste is reduced while ensuring that the engine temperature remains within a safe range.

[0097] When the engine power is further reduced to the second lowest load level, the system continues to monitor the water temperature and oil temperature of the engine in real time. If the water temperature or the oil temperature exceeds the second temperature threshold, the preset duration is extended. The preset duration refers to the default duration pre-set by the system at the second lowest load level. The extended duration may be 1.5 times or 2 times the preset time, ensuring that the engine temperature is further reduced to a safe range; if the water temperature or the oil temperature is lower than the third temperature threshold, the preset duration is shortened. The shortened duration may be 0.5 times or 0.75 times the preset time, ensuring that unnecessary energy waste is reduced while ensuring that the engine temperature remains within a safe range.

[0098] The first temperature threshold is used for temperature judgment at the first low load level and is the highest temperature threshold; the second temperature threshold is used for temperature judgment at the second low load level and is between the first temperature threshold and the third temperature threshold; the third temperature threshold is used for temperature judgment at the second low load level and is the lowest temperature threshold. The setting of these temperature thresholds ensures that the system can flexibly adjust the duration according to temperature changes at different load levels, thereby effectively controlling the engine temperature and protecting the engine from overheating damage.

[0099] In some embodiments of the present application, in order to dynamically adjust the duration of idling operation, ensure that the engine temperature is effectively controlled, protect the engine from overheating damage, and optimize energy efficiency, the engine load power level is reduced to idling operation, combined with a preset idling control strategy, to further reduce the engine temperature, specifically:

[0100] When the engine load power level is reduced to idle operation, the duration of the idle operation is determined in combination with the real-time water temperature and the oil temperature;

[0101] If the water temperature and / or the oil temperature is lower than the preset idle temperature threshold, continue idling for 2 to 3 minutes;

[0102] If the water temperature and / or the oil temperature is higher than a preset idle temperature threshold, the idle operation is continued for 4 to 5 minutes.

[0103] As described above, the system reduces the load power level of the engine to the idle operation state. Idle operation refers to the operation of the engine at the lowest stable speed, which is usually used to maintain necessary system functions and cooling requirements. In the idle operation state, the system monitors the water temperature and oil temperature of the engine in real time. Based on the real-time monitored water temperature and oil temperature, the system determines the duration of idle operation to ensure that the engine temperature is further reduced to a safe range. If the real-time monitored water temperature and / or oil temperature is lower than the preset idle temperature threshold during idle operation, the system will continue to idle the engine for 2 to 3 minutes to ensure that the temperature does not drop further too much and reduce unnecessary energy waste. If the real-time monitored water temperature and / or oil temperature is higher than the preset idle temperature threshold during idle operation, the system will continue to idle the engine for 4 to 5 minutes to ensure that the temperature has enough time to drop to a safe range to prevent the engine from overheating.

[0104] In some embodiments of the present application, in order to dynamically adjust the output power of the generator, ensure that the battery operates within a safe SOC range, prevent overcharging and undercharging, thereby protecting the health of the battery and extending its service life. Based on the real-time battery SOC data, the output power of the generator is dynamically adjusted through a preset adjustment strategy, specifically:

[0105] Monitor the charging state of the battery and obtain the battery SOC data in real time;

[0106] When the battery SOC data approaches the maximum threshold, gradually reducing the power generation of the generator to prevent the battery from being overcharged;

[0107] When the battery SOC data approaches the minimum threshold, the power generation of the generator is gradually increased to prevent the battery from being undercharged.

[0108] As mentioned above, the system monitors the battery's charging status in real time through sensors and obtains the battery SOC data in real time. The SOC data reflects the current remaining power of the battery. The system sets a maximum threshold, such as 80%, to prevent the battery from overcharging. When the real-time monitored battery SOC data approaches the maximum threshold (for example, it reaches 75%), the system begins to gradually reduce the generator's power generation. The generator's power generation is gradually reduced, for example, from 100% to 80%, and then to 70%, until the SOC data stabilizes below the maximum threshold. In this way, the battery is prevented from overcharging, protecting the battery's health and extending its service life.

[0109] The system sets a minimum threshold, such as 20%, to prevent the battery from being undercharged. When the real-time monitored battery SOC data approaches the minimum threshold (for example, reaching 25%), the system begins to gradually increase the power generation of the generator. The power generation of the generator increases gradually, for example, from 50% to 70%, and then to 80%, until the SOC data stabilizes above the minimum threshold. In this way, the battery is prevented from being undercharged and the battery is ensured to have enough power to maintain the normal operation of the mine car.

[0110] In some embodiments of the present application, in order to optimize the preheating time and starting current at the next start, and ensure that the mine car can be started safely and efficiently under various working conditions, the engine shutdown is monitored and confirmed, and the state information of the mine car at the time of the shutdown is recorded to facilitate subsequent startup, specifically:

[0111] When the engine speed drops below the idle speed and lasts for more than 3 seconds, it is confirmed that the engine has stopped;

[0112] The state information of the mine car during the shutdown is recorded to adjust the preheating time and starting current at the next startup, wherein the state information of the mine car includes the shutdown time, vehicle load data, driving speed, and slope.

[0113] As mentioned above, the system monitors the engine speed in real time through sensors. The idle speed refers to the engine speed at the lowest stable speed, such as 800 rpm. When the engine speed drops below the idle speed and this state lasts for more than 3 seconds, the system confirms that the engine has stopped. The system records the specific time when the engine stops, the load of the mine car when it stops, the speed of the mine car when it stops, and the slope of the mine car when it stops. This status information will be used to adjust the preheating time and starting current at the next start.

[0114] In some embodiments of the present application, in order to dynamically adjust the preheating time and starting current at the next start according to the specific state information of the mine car when it is stopped, it is ensured that the mine car can be started safely and efficiently under various working conditions. The state information of the mine car when it is stopped is recorded to adjust the preheating time and starting current at the next start, specifically:

[0115] The preheating time is prolonged as the downtime is prolonged;

[0116] The starting current increases with the increase of any one of the vehicle load data, the driving speed and the slope.

[0117] As mentioned above, the system records the specific time of the mine car shutdown. According to the length of the shutdown time, the system adjusts the preheating time at the next startup. For example, if the shutdown time is 1 hour, the preheating time can be set to 3 minutes; if the shutdown time is 12 hours, the preheating time can be extended to 5 minutes. In this way, it ensures that the engine can be fully preheated after a long shutdown, improving the startup success rate and system performance.

[0118] The system records the vehicle load data, driving speed and slope of the mine car when it is stopped. According to the size of these parameters, the system adjusts the starting current at the next start. If the mine car is under a heavy load when it is stopped, the starting current can be appropriately increased to ensure that the engine can overcome the heavy load and start smoothly; if the mine car is at a high driving speed when it is stopped, the starting current can be appropriately increased to ensure that the engine can quickly return to normal operation; if the mine car is in an uphill state when it is stopped, the starting current can be appropriately increased to overcome the additional resistance caused by the slope.

[0119] Compared with the prior art, the embodiment of the present application discloses a shutdown control method for a hybrid mine car range extender, which effectively avoids the risk of battery overcharging or undercharging by setting reasonable SOC safety thresholds and automatically triggering an engine shutdown signal when these thresholds are reached, thereby improving the battery life and the safety of the overall system; based on the engine shutdown signal and the current engine temperature, a corresponding load control strategy is executed, which can gradually reduce the engine load power until it runs at idle speed, thereby helping to reduce the mechanical stress that may be generated by the sudden load reduction of the engine, thereby protecting the engine from damage; by real-time monitoring of the battery SOC and adjusting the output power of the generator accordingly, a reasonable allocation of power resources is achieved, which not only ensures the supply of electricity required for system operation, but also avoids unnecessary energy waste; recording detailed status information at the time of shutdown not only helps to analyze the cause of the shutdown, but also provides a reference for the next startup, and by appropriately adjusting the preheating time and starting current, the mine car can resume normal working state in the shortest time, thereby improving work efficiency.

[0120] Based on the same inventive concept as the above method, the embodiment of the present application also proposes a shutdown control system for a hybrid mine car range extender, such as Figure 2 The figure shows a schematic diagram of the structure of a shutdown control system of a hybrid mine car range extender, which includes:

[0121] A shutdown detection module, used to generate and send an engine shutdown signal when the battery SOC data of the mining vehicle reaches a preset safety threshold;

[0122] A load control module, configured to execute a corresponding load control strategy based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle to reduce the engine load power;

[0123] An idle speed control module, configured to further reduce the engine temperature by reducing the engine load power level to idle speed operation in combination with a preset idle speed control strategy;

[0124] A battery management module, used to dynamically adjust the output power of the generator through a preset adjustment strategy based on the real-time battery SOC data;

[0125] The recording and analysis module is used to monitor and confirm the shutdown of the engine and record the status information of the mining vehicle when the engine is shut down to facilitate subsequent startup.

[0126] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0127] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0128] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0129] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A shutdown control method for a hybrid mining vehicle range extender, characterized in that: include: When the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent; Based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power; By reducing the engine load power level to idle operation, combined with a preset idle control strategy, the engine temperature is reduced; Based on the real-time battery SOC data, dynamically adjust the output power of the generator through a preset adjustment strategy; Monitoring and confirming the shutdown of the engine, and recording the status information of the mining vehicle at the time of the shutdown; When the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent, specifically: Acquire the battery SOC data of the mining vehicle in real time and compare it with the preset safety threshold; The safety threshold comprises a minimum threshold and a maximum threshold, and both the minimum threshold and the maximum threshold are within the SOC operating range of the battery; When the battery SOC data of the mining vehicle reaches the minimum threshold or the maximum threshold, an engine stop signal is generated and sent; Whether to immediately perform a shutdown operation is determined based on the current operating conditions of the mine car, wherein the operating conditions include vehicle load, travel speed, and slope.

2. The method according to claim 1, characterized in that Based on the engine shutdown signal, combined with the current engine temperature of the mining vehicle, a corresponding load control strategy is executed to reduce the engine load power, specifically: Real-time monitoring of the engine temperature of the mining vehicle, wherein the engine temperature includes water temperature and oil temperature; Based on the engine shutdown signal, obtaining a current power level of the engine; Through the load control strategy, the current engine power level is controlled to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power.

3. The method according to claim 2, characterized in that The load control strategy is used to control the current engine power level to be reduced to a preset low load level, and the duration of the low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power, specifically: Controlling the current engine power level to be sequentially reduced to a preset low load level, wherein the preset low load level includes a first low load level and a second low load level, wherein the first low load level is greater than the second low load level; The duration of each low load level is determined in combination with the real-time water temperature and the oil temperature to reduce the engine load power to the idle level.

4. The method according to claim 3, characterized in that The duration of each low load level is determined by combining the real-time water temperature and the oil temperature, specifically: If the water temperature and / or the oil temperature exceeds a first temperature threshold when the temperature is reduced to the first low load level, the preset duration is extended to determine a first duration of the first low load level; If the water temperature and / or the oil temperature is lower than a second temperature threshold when the temperature is reduced to the first low load level, the preset duration is shortened to determine a first duration of the first low load level; If the water temperature and / or the oil temperature exceeds a second temperature threshold when the load level is reduced to the second low load level, the preset duration is extended to determine a second duration; If the water temperature and / or the oil temperature is lower than a third temperature threshold when the load level is reduced to the second low load level, the preset duration is shortened to determine a second duration; The first temperature threshold is higher than the second temperature threshold, and the second temperature threshold is higher than the third temperature threshold.

5. The method according to claim 2, characterized in that The engine temperature is further reduced by reducing the engine load power level to idle operation in combination with a preset idle control strategy, specifically: When the engine load power level is reduced to idle operation, the duration of the idle operation is determined in combination with the real-time water temperature and the oil temperature; If the water temperature and / or the oil temperature is lower than the preset idle temperature threshold, the idle operation is continued for 2 to 3 minutes; If the water temperature and / or the oil temperature is higher than a preset idle temperature threshold, the idle operation is continued for 4 to 5 minutes.

6. The method according to claim 1, characterized in that The output power of the generator is dynamically adjusted based on the real-time battery SOC data through a preset adjustment strategy, specifically: Monitor the charging state of the battery and obtain the SOC data of the battery in real time; When the SOC data of the battery approaches the maximum threshold, gradually reducing the power generation of the generator to prevent the battery from being overcharged; When the SOC data of the battery approaches the minimum threshold, the power generation power of the generator is gradually increased to prevent the battery from being undercharged.

7. The method according to claim 1, characterized in that The monitoring and confirmation of the engine shutdown and recording of the state information of the mining vehicle during the shutdown to facilitate subsequent startup are specifically as follows: When the engine speed drops below the idle speed and lasts for more than 3 seconds, it is confirmed that the engine has stopped; The state information of the mine car during the shutdown is recorded to adjust the preheating time and starting current at the next startup, wherein the state information of the mine car includes the shutdown time, vehicle load data, driving speed, and slope.

8. The method according to claim 1, characterized in that The state information of the mining car during the shutdown is recorded to adjust the preheating time and starting current during the next startup, specifically: The preheating time is prolonged as the downtime is prolonged; The starting current increases with the increase of any one of the vehicle load data, the driving speed and the slope.

9. A shutdown control system for a hybrid mining vehicle range extender, characterized in that: include: A shutdown detection module, used to generate and send an engine shutdown signal when the battery SOC data of the mining vehicle reaches a preset safety threshold; A load control module, configured to execute a corresponding load control strategy based on the engine shutdown signal and in combination with the current engine temperature of the mining vehicle to reduce the engine load power; An idle speed control module, used for further reducing the engine temperature by reducing the engine load power level to idle speed operation in combination with a preset idle speed control strategy; A battery management module, used to dynamically adjust the output power of the generator through a preset adjustment strategy based on the real-time battery SOC data; A recording and analysis module, used to monitor and confirm the shutdown of the engine, and record the status information of the mining vehicle when the engine is shut down, so as to facilitate subsequent startup; When the battery SOC data of the mining vehicle reaches a preset safety threshold, an engine shutdown signal is generated and sent, specifically: Acquire the battery SOC data of the mining vehicle in real time and compare it with the preset safety threshold; The safety threshold comprises a minimum threshold and a maximum threshold, and both the minimum threshold and the maximum threshold are within the SOC operating range of the battery; When the battery SOC data of the mining vehicle reaches the minimum threshold or the maximum threshold, an engine stop signal is generated and sent; Whether to immediately perform a shutdown operation is determined based on the current operating conditions of the mine car, wherein the operating conditions include vehicle load, travel speed, and slope.

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