Heat dissipation methods and devices for construction machinery and construction machinery

Abstract

This invention relates to the field of construction machinery technology, specifically to a method, device, and construction machinery for heat dissipation. It acquires the current operating status and temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature, current coolant temperature, and current hydraulic oil temperature. Based on the current operating status and temperature data, it controls the water pump and / or fan in the corresponding heat dissipation system of the construction machinery to dissipate heat from the corresponding heat-generating components. This method ensures precise heat dissipation, avoids wasting energy by controlling hardware idling through "on-demand control," and is compatible with designs that integrate the whole machine controller and share fans, simplifying system operation, improving space utilization, and ultimately ensuring stable operation of the equipment at a reasonable temperature, reducing performance degradation or safety risks caused by poor heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a method and device for heat dissipation of engineering machinery and the engineering machinery itself. Background Technology

[0002] Driven by the concept of low-carbon and environmentally friendly development, compact, zero-emission mini electric excavators have become popular products in the market. The performance of their thermal management system directly determines the equipment's reliability and continuous operating capability. Poor heat dissipation under high-temperature conditions not only leads to performance degradation but may also pose safety risks to lithium battery equipment. Therefore, designing a stable and reliable heat dissipation system is crucial for accurately controlling the heat load during the operation of electric construction machinery.

[0003] Currently, the cooling system of small electric excavators uses two independent systems: ATS (Vehicle Thermal Management System) and TMS (Battery Thermal Management System). The ATS collects water and oil temperatures and controls the water pump and fan to dissipate heat from components such as the motor, controller, and hydraulic oil. The TMS interacts with the BMS (Battery Management System) and switches between cooling and heating modes based on the battery management system's thermal management requirements. During cooling, it controls the internal water pump, compressor, and fan to work together. While these two systems can maintain the temperatures of heat-generating components and the battery within a reasonable range, they also introduce hardware redundancy issues.

[0004] In the existing technology, the small space of the small electric excavator leads to a crowded hardware layout, which is contrary to the development direction of "saving energy, saving space, and having complete functions". Therefore, it has become an urgent problem to solve to provide a heat dissipation method for engineering machinery that can balance heat dissipation efficiency and space utilization. Summary of the Invention

[0005] This invention provides a method, device, and type of engineering machinery for heat dissipation, which can balance the issues of heat dissipation efficiency and space utilization.

[0006] In a first aspect, the present invention provides a method for heat dissipation of an entire construction machinery unit, applied to the overall controller of the construction machinery unit, the method comprising: Obtain the current working status and current temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data; Based on the current working status and current temperature data, the water pumps and / or fans in the corresponding heat dissipation system of the construction machinery are controlled to operate, so as to dissipate heat from the corresponding heat carriers in the construction machinery.

[0007] The heat dissipation method for construction machinery provided in this embodiment acquires the current operating status and current temperature data of the construction machinery. The current temperature data includes at least one of the following: current ambient temperature, current coolant temperature, and current hydraulic oil temperature. By collecting operating status (such as high-voltage power-on or charging) and core temperature data, precise data is provided for subsequent heat dissipation control. This method clearly identifies the equipment's operating condition (high-voltage power-on / charging with high heat dissipation requirements, or low-requirement conditions) and understands the temperature of the key heat dissipation media (coolant, hydraulic oil) and the external environment, avoiding "blind control" and achieving the core objective of precise heat load regulation. This lays a data foundation for the efficient operation of the heat dissipation system. Based on the current operating status and current temperature data, the water pump and / or fan in the corresponding heat dissipation system of the construction machinery are controlled to dissipate heat from the corresponding heat-generating components. Based on the previously acquired current operating status and temperature data, the water pump and fan are adjusted accordingly (e.g., water pump is activated as needed during high-voltage power-on / charging, and fan speed is adjusted when the temperature exceeds the limit). This ensures precise heat dissipation (e.g., fan speed is increased when coolant temperature is high, and fan energy consumption is reduced when the environment is suitable) and avoids wasting energy by idling hardware through "on-demand control." Simultaneously, the ATS controller is integrated into the vehicle controller, effectively eliminating the need for a separate ATS controller. This adapts to the design of "integrated control of the whole machine controller" and "shared fan," resolving the hardware redundancy issues caused by the separate design of the vehicle controller and ATS controller in existing technologies. This simplifies system operation, improves space utilization, and ultimately ensures stable operation of the equipment at a reasonable temperature, reducing performance degradation or safety risks caused by poor heat dissipation.

[0008] In one optional implementation, the water pump and / or fan in the cooling system of the engineering machinery are controlled to operate based on the current operating status and current temperature data, including: If the current working state of the construction machinery is the machine being powered on or the machine being charged, determine whether the current temperature data meets the temperature triggering conditions. If the current temperature data meets the temperature trigger condition, then control the water pump in the heat dissipation system to work; The temperature triggering conditions include at least one of the following: the current ambient temperature data is greater than the first preset ambient temperature threshold, the current coolant temperature data is greater than the first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than the first preset hydraulic oil temperature threshold. In one alternative implementation, the method further includes: If the current coolant temperature data is not within the preset coolant temperature range, and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, then control the water pump in the cooling system to operate.

[0009] The heat dissipation method for construction machinery provided in this application embodiment determines whether the current temperature data meets the temperature triggering conditions if the current working state of the construction machinery is either powered on or charging. If the current temperature data meets the temperature triggering conditions, the water pump in the heat dissipation system is controlled to operate. The temperature triggering conditions include at least one of the following: the current ambient temperature data is greater than a first preset ambient temperature threshold, the current coolant temperature data is greater than a first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than a first preset hydraulic oil temperature threshold. By using the logic of "starting the water pump when any of the ambient / coolant / hydraulic oil temperatures exceeds the limit," a coolant circulation path can be quickly established to remove heat in a timely manner, preventing heat accumulation from affecting component performance or causing safety risks. Simultaneously, it accurately matches these two types of high heat dissipation demand conditions, ensuring that the water pump intervenes promptly when needed, balancing heat dissipation timeliness and condition adaptability. If the current coolant temperature data is not within the preset coolant temperature range, and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, the water pump in the heat dissipation system is controlled to operate. When the temperature of the core heat dissipation medium (coolant, hydraulic oil) is abnormal, the water pump can be forcibly started to accelerate the circulation of the medium. Through heat exchange with the radiator, the temperature can be quickly regulated to avoid problems such as decreased hydraulic system efficiency and motor controller failure caused by continuous abnormal temperature. This logic does not depend on the ambient temperature, but only focuses on the state of the core medium, further ensuring the heat dissipation system's ability to control the temperature of key components and improving the stability of equipment operation.

[0010] In one optional implementation, the water pump and / or fan in the cooling system of the engineering machinery are controlled to operate based on the current operating status and current temperature data, including: If the current working state of the construction machinery is the whole machine powered on, then check whether the current ambient temperature data is greater than the second preset ambient temperature threshold. If the current ambient temperature data is greater than the second preset ambient temperature threshold, then determine whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range. If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then the first fan speed signal is calculated based on the current coolant temperature data, and the second fan speed signal is calculated based on the current hydraulic oil temperature data. Obtain the third fan speed signal requested by the battery thermal management system in the construction machinery; The maximum fan speed signal is determined from the first fan speed signal, the second fan speed signal, and the third fan speed signal; The system controls the operation of the fans in the cooling system based on the maximum fan speed signal.

[0011] In one alternative implementation, the method further includes: If the current coolant temperature data is not within the preset coolant temperature range, or the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, and the current ambient temperature data is greater than the first preset ambient temperature threshold, then the fan will be controlled to operate at full speed. If the current coolant temperature data is not within the preset coolant temperature range, or the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, and the current ambient temperature data is less than or equal to the first preset ambient temperature threshold, then the fan will not work.

[0012] The heat dissipation method for construction machinery provided in this application embodiment detects whether the current ambient temperature is greater than a second preset ambient temperature threshold if the current working state of the construction machinery is the machine being powered on. Prioritizing ambient temperature as the initial judgment criterion allows for quick screening of scenarios with poor external heat dissipation conditions, providing a preliminary reference for subsequent targeted fan adjustments. This avoids excessive cooling when the ambient temperature is suitable, aligning with the system's core principle of "on-demand control" and reducing ineffective energy consumption. If the current ambient temperature is greater than the second preset ambient temperature threshold, it determines whether the current coolant temperature and hydraulic oil temperature are within the preset coolant temperature range. This allows for the determination of whether the coolant and hydraulic oil sensors are faulty, preventing undetected faults from leading to incorrect fan control. If both the current coolant and hydraulic oil temperatures are within the preset range, a first fan speed signal is calculated based on the current coolant temperature data, and a second fan speed signal is calculated based on the current hydraulic oil temperature data. The rotational speed signals are calculated separately based on the temperatures of the two core media, allowing for targeted matching of different heat dissipation requirements. This ensures more accurate speed calculations, meeting the basic heat dissipation needs of each component while avoiding control deviations caused by a single temperature reference. The third fan speed signal requested by the battery thermal management system in the engineering machinery is acquired. Considering the design where the entire machine and battery heat dissipation share a single fan, the battery heat dissipation requirements are incorporated, balancing the cooling needs of the battery thermal management system and preventing abnormal battery temperature due to neglecting battery heat dissipation. This ensures the synergy of the heat dissipation needs of multiple systems in the entire machine. The maximum fan speed signal is determined from the first, second, and third fan speed signals. Selecting the maximum speed ensures that the maximum heat dissipation requirements of the coolant, hydraulic oil, and battery are met simultaneously, preventing overheating of any system due to insufficient speed. This prioritizes the safety of the core components of the entire machine and improves the reliability of the heat dissipation system. Based on the maximum fan speed signal, the fans in the heat dissipation system are controlled to operate. The determined maximum speed is converted into actual control commands, enabling the fans to operate at optimal speeds. This achieves efficient heat dissipation in scenarios with poor external heat dissipation conditions while avoiding energy waste through precise control, balancing heat dissipation effect and energy economy. If the current coolant temperature is outside the preset coolant temperature range, or the current hydraulic oil temperature is within the preset hydraulic oil temperature range, but the current ambient temperature is greater than the first preset ambient temperature threshold, the fan will operate at full speed. This quickly resolves heat buildup caused by abnormal coolant temperature and proactively mitigates the risk of subsequent heat dissipation from hydraulic oil or other components under high ambient temperatures. It prioritizes the safety of the core components of the entire machine, preventing performance degradation or malfunctions caused by high temperatures, thus aligning with the goal of improving the reliability of the cooling system.If the current coolant temperature is outside the preset coolant temperature range, or the current hydraulic oil temperature is within the preset hydraulic oil temperature range, and the current ambient temperature is less than or equal to the first preset ambient temperature threshold, the fan will not operate. In scenarios where the ambient temperature meets the natural heat dissipation requirements, the fan will stop working. This utilizes the natural heat exchange between the environment and the radiator to resolve abnormal coolant temperature issues, while preventing the fan from idling and consuming energy when the hydraulic oil temperature is normal. This aligns with the development trend of whole-machine controllers, balancing heat dissipation needs and energy economy, and also reduces fan wear and extends component lifespan.

[0013] In one optional implementation, the water pump and / or fan in the cooling system of the engineering machinery are controlled to operate based on the current operating status and current temperature data, including: If the current working state of the construction machinery is the whole machine charging state, then control the water pump to work; Determine whether the current coolant temperature data is within the preset coolant temperature range; If the current coolant temperature data is within the preset coolant temperature range, then the first fan speed signal is calculated based on the current coolant temperature data; The fan is controlled to operate based on the first fan speed signal.

[0014] In one optional implementation, the water pump and / or fan in the cooling system of the engineering machinery are controlled to operate based on the current operating status and current temperature data, including: If the current working state of the construction machinery is the whole machine charging state, determine whether the current temperature data meets the preset temperature conditions; If the current temperature data meets the preset temperature conditions, then control the fan to operate at full speed; The preset temperature conditions include at least one of the following: the current ambient temperature data is not within the preset ambient temperature range, the current coolant temperature data is not within the preset coolant temperature range, and the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range.

[0015] The heat dissipation method for construction machinery provided in this application embodiment controls the water pump to operate when the current working state of the construction machinery is the whole machine charging state. During charging, the battery and high-voltage system generate heat. Forcibly starting the water pump establishes a coolant circulation path, promptly removing heat and preventing heat buildup in the early stages of charging that could affect battery safety and charging efficiency. Simultaneously, it provides a "heat transfer carrier" for subsequent fan cooling, ensuring the basic functions of the cooling system are activated. The method determines whether the current coolant temperature data is within the preset coolant temperature range, thus confirming the coolant sensor's functionality and preventing incorrect fan control due to sensor malfunction. If the current coolant temperature data is within the preset range, a first fan speed signal is calculated based on this data. This achieves "on-demand speed adjustment," avoiding energy waste caused by the fan running at a fixed high speed, meeting the development needs of "energy saving" in construction machinery, and ensuring a balance between heat dissipation and energy consumption. Based on the first fan speed signal, the fan is controlled to operate. This matches the fan speed with the coolant temperature, ensuring timely heat dissipation at a reasonable speed without excessive energy consumption due to excessive speed, guaranteeing efficient and low-energy operation of the cooling system during charging. If the current operating state of the construction machinery is full machine charging, it is determined whether the current temperature data meets the preset temperature conditions. If the current temperature data meets the preset temperature conditions, the fan is controlled to operate at full speed. This enhances heat dissipation at maximum speed, rapidly reducing the temperature and prioritizing the safety of core components such as the battery and hydraulic system. This avoids the risk of equipment performance degradation or failure due to high temperatures, and improves the reliability and safety of the cooling system.

[0016] In one alternative implementation, the method further includes: If the current working state of the construction machinery is the whole machine powered on or the whole machine charging, then the current current of the water pump is monitored in real time. Based on the correspondence between the current current and the coolant bubble content, determine the current bubble content corresponding to the water pump; If the current bubble content is greater than or equal to the preset bubble content threshold, an alarm message is sent to the preset controller corresponding to the whole machine controller, and the electronic valve on the kettle corresponding to the water pump is opened to actively release air. The electronic valve will close once the current bubble content is less than the preset bubble content threshold.

[0017] The heat dissipation method for construction machinery provided in this application embodiment monitors the current current of the water pump in real time if the current working state of the construction machinery is either powered on or charging. It eliminates the need for additional bubble sensors, achieving indirect monitoring of coolant bubbles solely through reusing water pump current monitoring. This reduces hardware costs, simplifies system architecture, and leverages the real-time capability of the current sensor to promptly capture current changes caused by bubbles, providing accurate data for subsequent bubble content determination and avoiding the problem of "no bubble monitoring method" in existing technologies. Based on the correspondence between the current and coolant bubble content, the current bubble content corresponding to the water pump is determined. Transforming the abstract current signal into a quantifiable bubble content solves the technical challenge of "bubbles cannot be directly measured," providing a clear numerical basis for "whether venting is needed," avoiding misjudgments of bubble conditions based solely on current fluctuations, and improving control accuracy. If the current bubble content is greater than or equal to a preset bubble content threshold, an alarm message is sent to the preset controller corresponding to the overall machine controller, and the electronic valve on the water pump's reservoir is opened for active venting. On the one hand, by sending alarm information to the preset controller, operators can be aware of the bubble level in real time, preventing hidden faults. On the other hand, the dedicated kettle electronic valve actively vents air, specifically removing accumulated bubbles from the system. This solves the problem of decreased heat dissipation efficiency and accelerated system aging caused by the lack of active venting in existing technologies, improving the reliability of the cooling system. The electronic valve closes when the current bubble content is below the preset bubble content threshold. This timely venting prevents coolant loss caused by prolonged valve opening, prevents external air from re-entering the system, ensures the durability of the venting effect, and reduces valve operating energy consumption, balancing system stability and energy saving requirements.

[0018] Secondly, the present invention provides a heat dissipation device for an entire construction machinery unit, applied to the overall controller of the construction machinery unit, the device comprising: The acquisition module is used to acquire the current working status and current temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data; The control module is used to control the water pump and / or fan in the cooling system of the construction machinery to operate according to the current working status and current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0019] Thirdly, the present invention provides an engineering machinery, including: a whole machine controller, a battery thermal management system, and a heat dissipation system, wherein the whole machine controller includes a memory and a processor, the memory and the processor are interconnected, the memory stores computer instructions, and the processor executes the computer instructions to perform the engineering machinery whole machine heat dissipation method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an engineering machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first method for heat dissipation of engineering machinery according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a second process for a heat dissipation method for an entire engineering machinery according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the third process of the heat dissipation method for the entire engineering machinery according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the fourth process of the heat dissipation method for the entire engineering machinery according to an embodiment of the present invention; Figure 6 This is a fifth flowchart illustrating the heat dissipation method for the entire engineering machinery according to an embodiment of the present invention; Figure 7 This is a graph showing the relationship between the coolant bubble content and the current current of the water pump according to an embodiment of the present invention. Figure 8 This is a first structural block diagram of a heat dissipation device for an engineering machinery unit according to an embodiment of the present invention; Figure 9 This is a second structural block diagram of a heat dissipation device for an engineering machinery unit according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the hardware structure of the whole machine controller according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] As an optional application scenario of this invention, such as Figure 1 As shown in the figure, this application provides a structural schematic diagram of an engineering machine. Figure 1 As shown, the construction machinery includes multiple sensors, control units, and actuators. Specifically, as follows: Ambient temperature sensor: Used to detect the ambient temperature around the vehicle and transmit the ambient temperature signal to the overall controller, providing the controller with information on ambient temperature for its control decisions.

[0026] Coolant temperature sensor: detects the temperature of the coolant and sends the coolant temperature signal to the system controller. The system controller can adjust the working status of the cooling system based on the temperature, such as controlling the operation of the cooling fan, water pump, etc.

[0027] Hydraulic oil temperature sensor: Monitors the temperature of hydraulic oil and transmits the hydraulic oil temperature signal to the machine controller so that the machine controller can take corresponding control measures when the hydraulic oil temperature is abnormal.

[0028] The overall controller is the core control unit of the entire system. It receives signals from various sensors (ambient temperature sensor, coolant temperature sensor, hydraulic oil temperature sensor, etc.) and the TMS (battery thermal management system) (via CAN communication). After processing, it sends control signals (PWM signals, level signals, etc.) to the actuators such as cooling fans, electronic valves, and water pumps to achieve precise control of the cooling system.

[0029] TMS (Battery Thermal Management System): It interacts with the main controller via CAN communication, transmitting relevant information to the main controller to assist the main controller in making control decisions.

[0030] Cooling fan: Receives PWM signals sent by the whole machine controller and adjusts the fan speed according to the duty cycle of the PWM signal, thereby controlling the intensity of heat dissipation to ensure that the coolant temperature is within a suitable range.

[0031] Electronic valve: Receives level signals from the overall controller and performs actions such as opening or closing to achieve exhaust.

[0032] Water pump: Receives the level signal from the main controller to control the operation of the water pump, providing power for the circulation of coolant. Simultaneously, a current sensor detects the water pump's operating current (feedback to the main controller in the form of a 0-5V voltage signal). The main controller can monitor the water pump's operating status through the water pump current. For example, when there are air bubbles in the coolant, the water pump's operating current will change, and the main controller can determine this and perform corresponding operations such as venting.

[0033] CAN Communication: The whole machine controller transmits data with the display and TMS via CAN communication to realize information exchange. For example, the whole machine controller can send abnormal information to the display via CAN communication.

[0034] Current sensor: Used to detect the operating current of the water pump and feed the current signal back to the whole machine controller in the form of a 0-5V voltage signal. The whole machine controller monitors the operating status of the water pump based on the feedback signal and determines whether there are any abnormalities (such as air bubbles in the coolant causing changes in the water pump load, abnormal current, etc.).

[0035] Through the coordinated work of these components, the entire system can effectively control the vehicle's cooling system, ensuring that components such as the engine operate at the appropriate temperature.

[0036] According to an embodiment of the present invention, a method for heat dissipation of an entire engineering machinery is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0037] This embodiment provides a method for heat dissipation of construction machinery, which can be used in the overall controller of construction machinery. Figure 2 This is a flowchart of a heat dissipation method for engineering machinery according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: Obtain the current working status and current temperature data of the construction machinery.

[0038] The current temperature data includes at least one of the following: current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data.

[0039] Specifically, the overall controller can monitor the hydraulic system and motor in the construction machinery to determine the current working status of the machinery. The current working status can include the machine being powered on (i.e., the machinery is working), the machine being charged, or the machine being powered off (i.e., the machinery is not working).

[0040] The overall controller can acquire the current ambient temperature data corresponding to the construction machinery transmitted by the ambient temperature sensor based on the communication connection with the ambient temperature sensor.

[0041] The machine controller can acquire the current coolant temperature data corresponding to the construction machinery, transmitted by the coolant temperature sensor, through a communication connection with the sensor. The coolant temperature sensor is located at the inlet of the coolant radiator.

[0042] The machine controller can acquire the current hydraulic oil temperature data corresponding to the construction machinery, transmitted by the hydraulic oil temperature sensor, based on the communication connection with the hydraulic oil temperature sensor. The hydraulic oil temperature sensor is located at the inlet of the hydraulic oil radiator.

[0043] Step S202: Control the water pump and / or fan in the heat dissipation system of the construction machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0044] Specifically, the whole machine controller can control the water pump and / or fan in the heat dissipation system of the construction machinery to work based on the current working status of the construction machinery, as well as at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0045] The heat dissipation system includes a battery heat dissipation system and a liquid cooling system. The battery heat dissipation system and the liquid cooling system share a cooling fan. The liquid cooling system includes a hydraulic oil heat dissipation system and a coolant heat dissipation system. The battery heat dissipation system includes a first water pump, a battery heat dissipation module, a battery heat exchanger, a condenser, a compressor, and a cooling fan. The first water pump, the battery heat dissipation module, and the battery heat exchanger form a first coolant circulation loop. The battery heat exchanger, the condenser, and the compressor form a refrigerant circulation loop. The hydraulic oil heat dissipation system includes a hydraulic oil radiator, a cooling fan, a hydraulic oil tank, etc. The coolant heat dissipation system includes a coolant radiator, a cooling fan, a second water pump, and heat dissipation channels on the heat-generating elements, such as a motor. The coolant radiator, the second water pump, and the heat dissipation channels form a second coolant circulation loop.

[0046] For example, the current working state of construction machinery can be either the machine is powered on or the machine is charging.

[0047] This step will be explained in detail below.

[0048] The heat dissipation method for construction machinery provided in this embodiment acquires the current operating status and current temperature data of the construction machinery. The current temperature data includes at least one of the following: current ambient temperature, current coolant temperature, and current hydraulic oil temperature. By collecting operating status (such as high-voltage power-on or charging) and core temperature data, precise data is provided for subsequent heat dissipation control. This method clearly identifies the equipment's operating condition (high-voltage power-on / charging with high heat dissipation requirements, or low-requirement conditions) and understands the temperature of the key heat dissipation media (coolant, hydraulic oil) and the external environment, avoiding "blind control" and achieving the core objective of precise heat load regulation. This lays a data foundation for the efficient operation of the heat dissipation system. Based on the current operating status and current temperature data, the water pump and / or fan in the corresponding heat dissipation system of the construction machinery are controlled to dissipate heat from the corresponding heat-generating components. Based on the currently acquired operating status and temperature data, the water pump and fan are adjusted accordingly (e.g., water pump is activated as needed during high-voltage power-on / charging, and fan speed is adjusted when the temperature exceeds the limit). This ensures precise heat dissipation (e.g., fan speed is increased when coolant temperature is high, and fan energy consumption is reduced when the environment is suitable) and avoids wasting energy by idling hardware through "on-demand control." Simultaneously, the ATS controller is integrated into the vehicle controller, effectively eliminating the need for a separate ATS controller. This adapts to the design of "integrated control of the whole machine controller" and "shared fan," resolving the hardware redundancy issue caused by the separate design of the vehicle controller and ATS controller in existing technologies. This simplifies system operation, improves space utilization, and ultimately ensures stable operation of the equipment at a reasonable temperature, reducing performance degradation or safety risks caused by poor heat dissipation.

[0049] This embodiment provides a method for heat dissipation of construction machinery, which can be used in the overall controller of construction machinery. Figure 3 This is a flowchart of a heat dissipation method for engineering machinery according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps: Step S301: Obtain the current working status and current temperature data of the construction machinery.

[0050] The current temperature data includes at least one of the following: current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data.

[0051] Please refer to the above description of step S201 for details on this step, which will not be repeated here.

[0052] Step S302: Control the water pump and / or fan in the heat dissipation system of the construction machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0053] Specifically, step S302 above may include the following steps: Step S3021: If the current working state of the construction machinery is the whole machine power-on state or the whole machine charging state, determine whether the current temperature data meets the temperature triggering condition.

[0054] Step S3022: If the current temperature data meets the temperature triggering condition, control the water pump in the heat dissipation system to work.

[0055] The temperature triggering conditions include at least one of the following: the current ambient temperature data is greater than the first preset ambient temperature threshold, the current coolant temperature data is greater than the first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than the first preset hydraulic oil temperature threshold.

[0056] Specifically, when the construction machinery is in a fully powered-on state (the equipment is turned on normally, the high-voltage electrical system is powered on, and it has entered a workable or running state) or a fully charged state (such as the battery charging process of electric construction machinery), if at least one of the following three conditions is met simultaneously: "the current ambient temperature data is greater than the first preset ambient temperature threshold", "the current coolant temperature data is greater than the first preset coolant temperature threshold", and "the current hydraulic oil temperature data is greater than the first preset hydraulic oil temperature threshold", the machine controller will control the water pump in the cooling system to work.

[0057] When the machine is powered on or charging, the electrical and power systems of the construction machinery are in operation or preparation mode, which will generate heat or may accumulate heat.

[0058] When the ambient temperature is too high (above the first preset ambient temperature threshold), it will affect the efficiency of the heat dissipation system in dissipating heat to the outside. In this case, the water pump needs to work to accelerate the circulation of coolant and enhance heat dissipation capacity. When the coolant temperature is too high (above the first preset coolant temperature threshold), it means that the heat inside the equipment (such as motor components) cannot be dissipated in time. The water pump can promote the flow of coolant and carry the heat to the radiator for dissipation. When the hydraulic oil temperature is too high (above the first preset hydraulic oil temperature threshold), the hydraulic system generates too much heat due to friction and pressure. The water pump drives the coolant circulation, which can reduce the hydraulic oil temperature through heat exchange with the hydraulic oil radiator. As long as one of the temperature exceeding the limit is met, the water pump will be started to dissipate heat in advance or in a timely manner, preventing the temperature from rising further and affecting the performance of the equipment or even causing damage.

[0059] The first preset ambient temperature threshold can be 5℃, 4℃, or other temperatures; there is no specific limitation on the first preset ambient temperature threshold. The first preset coolant temperature threshold can be 15℃, 14℃, or other temperatures; there is no specific limitation on the first preset coolant temperature threshold. The first preset hydraulic oil temperature threshold can be 20℃, 21℃, or other temperatures; there is no specific limitation on the first preset hydraulic oil temperature threshold.

[0060] Step S3023: If the current coolant temperature data is not within the preset coolant temperature range, and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, then control the water pump in the cooling system to work.

[0061] Specifically, if "the current coolant temperature data is not within the preset coolant temperature range" (for example, it is lower than the preset lower limit or higher than the preset upper limit, indicating that the coolant temperature sensor may be faulty or short-circuited), or "the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range" (again, indicating that the hydraulic oil temperature sensor may be faulty or short-circuited), in order to ensure that each piece of construction machinery can work normally and avoid malfunctions, the whole machine controller will control the water pump to work.

[0062] If none of the above conditions are met, the power relay for the disabled water pump, i.e., the power relay controlling the water pump, will not operate, thereby preventing the water pump from working. In other words, the water pump will shut down when the construction machinery is not powered on or charging.

[0063] The heat dissipation method for construction machinery provided in this application embodiment, if the current working state of the construction machinery is the machine being powered on or charging, and the current ambient temperature data is greater than a first preset ambient temperature threshold, and / or the current coolant temperature data is greater than a first preset coolant temperature threshold, and / or the current hydraulic oil temperature data is greater than a first preset hydraulic oil temperature threshold, then the water pump in the heat dissipation system is controlled to operate. Through the logic of "starting the water pump when any of the ambient / coolant / hydraulic oil temperatures exceeds the limit," a coolant circulation path can be quickly established to promptly remove heat, preventing heat accumulation from affecting component performance or causing safety risks; simultaneously, it accurately matches these two types of high heat dissipation demand conditions, ensuring that the water pump intervenes promptly when needed, balancing heat dissipation timeliness and condition adaptability. If the current coolant temperature data is not within the preset coolant temperature range, and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, then the water pump in the heat dissipation system is controlled to operate. When the temperature of the core heat dissipation medium (coolant, hydraulic oil) is abnormal, the water pump can be forcibly started to accelerate the circulation of the medium. Through heat exchange with the radiator, the temperature can be quickly regulated to avoid problems such as decreased hydraulic system efficiency and motor controller failure caused by continuous abnormal temperature. This logic does not depend on the ambient temperature, but only focuses on the state of the core medium, further ensuring the heat dissipation system's ability to control the temperature of key components and improving the stability of equipment operation.

[0064] This embodiment provides a method for heat dissipation of construction machinery, which can be used in the overall controller of construction machinery. Figure 4 This is a flowchart of a heat dissipation method for engineering machinery according to an embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps: Step S401: Obtain the current working status and current temperature data of the construction machinery.

[0065] The current temperature data includes at least one of the following: current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data.

[0066] Step S402: Control the water pump and / or fan in the heat dissipation system of the construction machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0067] Specifically, step S402 above may include the following steps: Step S4021: If the current working state of the construction machinery is the whole machine powered on, then detect whether the current ambient temperature data is greater than the second preset ambient temperature threshold.

[0068] Specifically, when the construction machinery is in a fully powered-on state (i.e., the equipment is normally turned on, the high-voltage electrical system is powered, and it has entered a workable or running state), the first step is to check whether the current ambient temperature data is greater than the second preset ambient temperature threshold. This step is a preliminary judgment of the external ambient temperature, because the ambient temperature will affect the efficiency of the heat dissipation system in dissipating heat to the outside. If the ambient temperature is too high (greater than the second preset ambient temperature threshold), the heat dissipation requirements need to be further evaluated.

[0069] Wherein, the second preset ambient temperature threshold is greater than the first preset ambient temperature threshold. For example, the second preset ambient temperature threshold can be 15°C, or 14°C, or other temperature values. This application embodiment does not specifically limit the second preset ambient temperature threshold.

[0070] Step S4022: If the current ambient temperature data is greater than the second preset ambient temperature threshold, then determine whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range.

[0071] Specifically, if the current ambient temperature data is greater than the second preset ambient temperature threshold, then it is determined whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range.

[0072] The preset coolant temperature range and preset hydraulic oil temperature range are the temperature ranges that the coolant and hydraulic oil should maintain during normal operation of the construction machinery. This step involves checking the temperature status of the coolant and hydraulic oil inside the construction machinery under high ambient temperatures to determine whether they are within the normal operating temperature range, thus identifying the heat dissipation requirements based on the coolant and hydraulic oil temperatures.

[0073] Step S4023: If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then calculate the first fan speed signal based on the current coolant temperature data and calculate the second fan speed signal based on the current hydraulic oil temperature data.

[0074] Specifically, if the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then the first fan speed signal is calculated based on the current coolant temperature data; at the same time, the second fan speed signal is calculated based on the current hydraulic oil temperature data.

[0075] The calculations here typically convert coolant temperature and hydraulic oil temperature into corresponding fan speed demand signals based on pre-set algorithms or mapping relationships. For example, the higher the temperature, the higher the required fan speed signal, in order to enhance heat dissipation.

[0076] For example, the system controller can calculate the first fan speed signal based on the following formula: ; in, This is the first fan speed signal. This is the maximum temperature value within the preset coolant temperature range. This is the minimum temperature value within the preset coolant temperature range. This is the current coolant temperature data.

[0077] The formula means: The whole machine controller obtains the current coolant temperature data Tw. Tw1 (the minimum temperature value in the preset coolant temperature range) and Tw2 (the maximum temperature value in the preset coolant temperature range) correspond to the fan PWM duty cycle of 10% and 100% respectively, that is, the minimum speed and maximum speed of the fan. The whole machine controller calculates the fan PWM duty cycle PWM1 proportionally.

[0078] The system controller can calculate the second fan speed signal based on the following formula: ; in, This is the second fan speed signal. This is the maximum temperature value within the preset hydraulic oil temperature range. This is the minimum temperature value within the preset hydraulic oil temperature range. This is the current hydraulic oil temperature data.

[0079] The formula means: The whole machine controller obtains the current hydraulic oil temperature data To. To1 (the minimum temperature value in the preset hydraulic oil temperature range) and To2 (the maximum temperature value in the preset hydraulic oil temperature range) correspond to the fan duty cycle of 10% and 100% respectively, that is, the minimum speed and maximum speed of the fan. The whole machine controller calculates the fan PWM duty cycle PWM2 proportionally.

[0080] Step S4024: Obtain the third fan speed signal requested by the battery thermal management system in the construction machinery.

[0081] Specifically, the overall controller can receive a third fan speed signal requested by the battery thermal management system based on the communication connection with the battery thermal management system in the engineering machinery.

[0082] The battery thermal management system (TMS) will request fan speed based on the battery's temperature and other conditions to ensure that the battery operates at a suitable temperature. Therefore, it is necessary to obtain the speed signal requested by the system.

[0083] Step S4025: Determine the maximum fan speed signal from the first fan speed signal, the second fan speed signal, and the third fan speed signal.

[0084] Specifically, the controller compares the first fan speed signal, the second fan speed signal, and the third fan speed signal, and then determines the maximum fan speed signal from among them. This is because the cooling system's fans need to simultaneously meet the cooling requirements of the coolant, hydraulic oil, and battery. To ensure that all parts requiring cooling receive sufficient heat dissipation, the maximum fan speed signal is selected. This guarantees that the fans can provide adequate cooling even under the most demanding cooling requirements.

[0085] Step S4026: Based on the maximum fan speed signal, control the fan in the cooling system to operate.

[0086] Specifically, the overall controller controls the operation of the fans in the cooling system based on the maximum fan speed signal. That is, according to the determined maximum fan speed signal, the fan speed is adjusted so that the fan runs at the corresponding speed, thereby meeting the heat dissipation requirements of the entire machine (including coolant, hydraulic oil, battery, etc.) and ensuring that the equipment operates stably in a suitable temperature environment.

[0087] In an optional implementation, the method further includes: Step S4027: If the current ambient temperature data is less than or equal to the second preset ambient temperature threshold, then determine whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range.

[0088] For details on this step, please refer to the description of step S4022 above; it will not be repeated here.

[0089] Step S4028: If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then calculate the first fan speed signal based on the current coolant temperature data and calculate the second fan speed signal based on the current hydraulic oil temperature data.

[0090] For details on this step, please refer to the description of step S4023 above; it will not be repeated here.

[0091] Step S4029: Control the fans in the cooling system to work according to the first fan speed signal and the second fan speed signal.

[0092] For details on this step, please refer to the description of step S4024 above; it will not be repeated here.

[0093] Step S40210: If the current coolant temperature data is not within the preset coolant temperature range, or the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, determine whether the current ambient temperature data is greater than the first preset ambient temperature threshold.

[0094] Step S40211: If the current ambient temperature data is greater than the first preset ambient temperature threshold, then control the fan to operate at full speed.

[0095] Specifically, if the current coolant temperature data is not within the preset coolant temperature range, the machine controller determines that the coolant temperature sensor is short-circuited or open-circuited; if the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, the machine controller determines that the hydraulic oil temperature sensor is short-circuited or open-circuited.

[0096] When the coolant temperature sensor is short-circuited or open-circuited, or the hydraulic oil temperature sensor is short-circuited or open-circuited, and the current ambient temperature data is greater than the first preset ambient temperature threshold, in order to ensure the normal operation of the construction machinery and prevent malfunctions, the whole machine controller can control the fan to operate at full speed.

[0097] Step S40211: If the current ambient temperature data is less than or equal to the first preset ambient temperature threshold, then control the fan to not work.

[0098] Specifically, if the current coolant temperature data is not within the preset coolant temperature range, the machine controller determines that the coolant temperature sensor is short-circuited or open-circuited; if the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, the machine controller determines that the hydraulic oil temperature sensor is short-circuited or open-circuited.

[0099] When the coolant temperature sensor is short-circuited or open-circuited, or the hydraulic oil temperature sensor is short-circuited or open-circuited, and the current ambient temperature data is less than or equal to the first preset ambient temperature threshold, the construction machinery will not experience overheating and malfunction due to the low ambient temperature. Therefore, in order to save energy, the whole machine controller can control the fan to not work.

[0100] In one optional embodiment of this application, the fan is turned off when the construction machinery is not powered on or not charging.

[0101] The heat dissipation method for construction machinery provided in this application embodiment detects whether the current ambient temperature is greater than a second preset ambient temperature threshold if the current working state of the construction machinery is the machine being powered on. Prioritizing ambient temperature as the initial judgment criterion allows for quick screening of scenarios with poor external heat dissipation conditions, providing a preliminary reference for subsequent targeted fan adjustments. This avoids excessive cooling when the ambient temperature is suitable, aligning with the system's core principle of "on-demand control" and reducing ineffective energy consumption. If the current ambient temperature is greater than the second preset ambient temperature threshold, it determines whether the current coolant temperature and hydraulic oil temperature are within the preset coolant temperature range. This allows for the determination of whether the coolant and hydraulic oil sensors are faulty, preventing undetected faults from leading to incorrect fan control. If both the current coolant and hydraulic oil temperatures are within the preset range, a first fan speed signal is calculated based on the current coolant temperature data, and a second fan speed signal is calculated based on the current hydraulic oil temperature data. The rotational speed signals are calculated separately based on the temperatures of the two core media, allowing for targeted matching of different heat dissipation requirements. This ensures more accurate speed calculations, meeting the basic heat dissipation needs of each component while avoiding control deviations caused by a single temperature reference. The third fan speed signal requested by the battery thermal management system in the engineering machinery is acquired. Considering the design where the entire machine and battery heat dissipation share a single fan, the battery heat dissipation requirements are incorporated, balancing the cooling needs of the battery thermal management system and preventing abnormal battery temperature due to neglecting battery heat dissipation. This ensures the synergy of the heat dissipation needs of multiple systems in the entire machine. The maximum fan speed signal is determined from the first, second, and third fan speed signals. Selecting the maximum speed ensures that the maximum heat dissipation requirements of the coolant, hydraulic oil, and battery are met simultaneously, preventing overheating of any system due to insufficient speed. This prioritizes the safety of the core components of the entire machine and improves the reliability of the heat dissipation system. Based on the maximum fan speed signal, the fans in the heat dissipation system are controlled to operate. The determined maximum speed is converted into actual control commands, enabling the fans to operate at optimal speeds. This achieves efficient heat dissipation in scenarios with poor external heat dissipation conditions while avoiding energy waste through precise control, balancing heat dissipation effect and energy economy. If the current coolant temperature is outside the preset coolant temperature range, or the current hydraulic oil temperature is within the preset hydraulic oil temperature range, but the current ambient temperature is greater than the first preset ambient temperature threshold, the fan will operate at full speed. This quickly resolves heat buildup caused by abnormal coolant temperature and proactively mitigates the risk of subsequent heat dissipation from hydraulic oil or other components under high ambient temperatures. It prioritizes the safety of the core components of the entire machine, preventing performance degradation or malfunctions caused by high temperatures, thus aligning with the goal of improving the reliability of the cooling system.If the current coolant temperature is outside the preset coolant temperature range, or the current hydraulic oil temperature is within the preset hydraulic oil temperature range, and the current ambient temperature is less than or equal to the first preset ambient temperature threshold, the fan will not operate. In scenarios where the ambient temperature meets the natural heat dissipation requirements, the fan will stop working. This utilizes the natural heat exchange between the environment and the radiator to resolve abnormal coolant temperature issues, while preventing the fan from idling and consuming energy when the hydraulic oil temperature is normal. This aligns with the development trend of whole-machine controllers, balancing heat dissipation needs and energy economy, and also reduces fan wear and extends component lifespan.

[0102] This embodiment provides a method for heat dissipation of construction machinery, which can be used in the overall controller of construction machinery. Figure 5 This is a flowchart of a heat dissipation method for engineering machinery according to an embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps: Step S501: Obtain the current working status and current temperature data of the construction machinery.

[0103] The current temperature data includes at least one of the following: current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data.

[0104] Step S502: Control the water pump and / or fan in the heat dissipation system of the construction machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0105] Specifically, step S502 above may include the following steps: Step S5021: If the current working state of the construction machinery is the whole machine charging state, then control the water pump to work.

[0106] Specifically, the whole machine charging state refers to the working condition of electric construction machinery connected to charging equipment to charge the battery. At this time, the battery will generate heat due to the charging process, and the high voltage system is in the energized state. It is necessary to maintain the temperature stability of the core components (battery, coolant circulation pipeline, hydraulic system) through the heat dissipation system to avoid high temperature affecting charging efficiency or causing safety risks.

[0107] If the current operating state of the construction machinery is that of charging the entire machine, the battery will continuously generate heat, and the core components (such as the charging module and motor controller) will also generate basic heat after the high-voltage system is powered on. Therefore, the machine controller can control the water pump to work, and a basic heat dissipation path needs to be established by "the water pump driving the coolant circulation": the coolant flows through the battery heat dissipation circuit and the surface of the core components, transferring heat to the radiator, providing a "heat transfer carrier" for the subsequent fan heat dissipation.

[0108] Step S5022: Determine whether the current coolant temperature data is within the preset coolant temperature range.

[0109] Specifically, the current coolant temperature data is a core indicator of heat dissipation requirements during charging (directly reflecting the heat accumulation of the battery and core components). By determining whether the current coolant temperature data is within the preset coolant temperature range, it is possible to determine whether the coolant sensor is malfunctioning.

[0110] Step S5023: If the current coolant temperature data is within the preset coolant temperature range, then calculate the first fan speed signal based on the current coolant temperature data.

[0111] Specifically, if the current coolant temperature data is within the preset coolant temperature range, it is determined that the coolant sensor is not faulty. Then, the system controller calculates the first fan speed signal based on the current coolant temperature data.

[0112] For example, the system controller can calculate the first fan speed signal based on the following formula: ; in, This is the first fan speed signal. This is the maximum temperature value within the preset coolant temperature range. This is the minimum temperature value within the preset coolant temperature range. This is the current coolant temperature data.

[0113] The formula means: The whole machine controller obtains the current coolant temperature data Tw. Tw1 (the minimum temperature value in the preset coolant temperature range) and Tw2 (the maximum temperature value in the preset coolant temperature range) correspond to the fan PWM duty cycle of 10% and %100, respectively, which are the minimum and maximum fan speeds. The whole machine controller calculates the fan PWM duty cycle PWM1 proportionally.

[0114] Step S5024: Control the fan to work based on the first fan speed signal.

[0115] Specifically, the system controller converts the first fan speed signal (PWM duty cycle) into a control command and outputs it to the cooling fan, causing the fan to run at the corresponding speed.

[0116] Step S5025: If the current working state of the construction machinery is the whole machine charging state, determine whether the current temperature data meets the preset temperature conditions.

[0117] Step S5026: If the current temperature data meets the preset temperature conditions, control the fan to operate at full speed.

[0118] The preset temperature conditions include at least one of the following: the current ambient temperature data is not within the preset ambient temperature range, the current coolant temperature data is not within the preset coolant temperature range, and the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range.

[0119] Specifically, if the current working state of the construction machinery is the whole machine charging state, and at least one of the following abnormal temperature conditions is met: Condition 1: The current ambient temperature data is not within the preset ambient temperature range (usually indicating that the ambient temperature sensor is short-circuited or open-circuited). Condition 2: The current coolant temperature data is not within the preset coolant temperature range (meaning the coolant sensor is short-circuited or open-circuited). Condition 3: The current hydraulic oil temperature data is not within the preset hydraulic oil temperature range (meaning that the hydraulic oil sensor is short-circuited or open-circuited).

[0120] The overall controller then controls the fan to operate at full speed, thereby ensuring the normal operation of the construction machinery.

[0121] The heat dissipation method for construction machinery provided in this application embodiment controls the water pump to operate when the current working state of the construction machinery is the whole machine charging state. During charging, the battery and high-voltage system generate heat. Forcibly starting the water pump establishes a coolant circulation path, promptly removing heat and preventing heat buildup in the early stages of charging that could affect battery safety and charging efficiency. Simultaneously, it provides a "heat transfer carrier" for subsequent fan cooling, ensuring the basic functions of the cooling system are activated. The method determines whether the current coolant temperature data is within the preset coolant temperature range, thus confirming the coolant sensor's functionality and preventing incorrect fan control due to sensor malfunction. If the current coolant temperature data is within the preset range, a first fan speed signal is calculated based on this data. This achieves "on-demand speed adjustment," avoiding energy waste caused by the fan running at a fixed high speed, meeting the development needs of "energy saving" in construction machinery, and ensuring a balance between heat dissipation and energy consumption. Based on the first fan speed signal, the fan is controlled to operate. This matches the fan speed with the coolant temperature, ensuring timely heat dissipation at a reasonable speed without excessive energy consumption due to excessive speed, guaranteeing efficient and low-energy operation of the cooling system during charging. If the current operating state of the construction machinery is full machine charging, and the current ambient temperature data is outside the preset ambient temperature range, and / or the current coolant temperature data is outside the preset coolant temperature range, and / or the current hydraulic oil temperature data is outside the preset hydraulic oil temperature range, then the fan will be controlled to operate at full speed. Enhancing heat dissipation at maximum speed can quickly reduce temperature, prioritizing the safety of core components such as the battery and hydraulic system, avoiding the risk of equipment performance degradation or failure due to high temperatures, and improving the reliability and safety of the cooling system.

[0122] In one optional embodiment of this application, such as Figure 6 As shown in the above embodiments, the heat dissipation method for the entire construction machinery may further include the following steps: Step S601: If the current working state of the construction machinery is the whole machine powered on or the whole machine charging, then monitor the current current of the water pump in real time.

[0123] Specifically, if the current working state of the construction machinery is the machine being powered on or charging, the machine controller collects the working current data of the water pump in real time through a current sensor connected in series in the water pump power supply circuit (wherein, the current sensor feeds back to the machine controller in the form of a 0-5V voltage signal). The collection frequency is matched with the coolant circulation frequency to ensure that current fluctuations caused by air bubbles can be captured in a timely manner.

[0124] Step S602: Determine the current bubble content corresponding to the water pump based on the correspondence between the current current and the coolant bubble content.

[0125] Specifically, the system controller can receive the correspondence between the current current and the coolant bubble content, as well as the correspondence between the current current and the coolant bubble content sent by other devices. It can also retrieve the correspondence between the current current and the coolant bubble content from storage. The correspondence between the current current and the coolant bubble content can be obtained by fitting historical currents and their corresponding coolant bubble contents.

[0126] For example, such as Figure 7 The figure shows the relationship between coolant bubble content and the current water pump current. Based on this relationship curve, the system controller can establish a model A between coolant bubble content (y) and the current water pump current (x). .

[0127] The overall controller can substitute the current current of the water pump into model A to obtain the current bubble content corresponding to the water pump.

[0128] Step S603: If the current bubble content is greater than or equal to the preset bubble content threshold, an alarm message is sent to the preset controller corresponding to the whole machine controller, and the electronic valve on the kettle corresponding to the water pump is opened to actively release air.

[0129] Specifically, the system controller can compare the current bubble content with a preset bubble content threshold. If the current bubble content is greater than or equal to the preset threshold, the system controller can send an "excessive coolant bubbles" error message to a preset controller (such as an IECU, or human-machine interface display controller) via CAN communication. The preset controller will then alert the operator via text, indicator lights, or other means. This design allows operators to be aware of the system status in real time, preventing hidden equipment malfunctions caused by bubble issues.

[0130] In addition, the overall controller can output a level signal to control the opening of the electronic valve installed on the "water tank corresponding to the water pump" (coolant expansion tank, where air bubbles tend to accumulate). The coolant circulation pressure is used to discharge the air bubbles in the system through the valve, ensuring targeted venting and preventing coolant leakage.

[0131] Step S604: Close the electronic valve until the current bubble content is less than the preset bubble content threshold.

[0132] Specifically, the whole machine controller continuously monitors the current current corresponding to the water pump (continuing the real-time acquisition in step S601), and continuously calculates the current bubble content through the model in step S602. When the current bubble content y < the preset bubble content threshold, this step is triggered.

[0133] The controller outputs a shutdown signal, cutting off the power supply to the electronic valve, causing the valve to close and stopping the venting. At this point, the bubble content in the coolant circulation system has dropped to a safe range. Continuing to vent would lead to coolant loss or the introduction of new air, so it must be stopped promptly, forming a closed-loop control system of "venting-monitoring-stopping".

[0134] The heat dissipation method for construction machinery provided in this application embodiment monitors the current current of the water pump in real time if the current working state of the construction machinery is either powered on or charging. It eliminates the need for additional bubble sensors, achieving indirect monitoring of coolant bubbles solely through reusing water pump current monitoring. This reduces hardware costs, simplifies system architecture, and leverages the real-time capability of the current sensor to promptly capture current changes caused by bubbles, providing accurate data for subsequent bubble content determination and avoiding the problem of "no bubble monitoring method" in existing technologies. Based on the correspondence between the current and coolant bubble content, the current bubble content corresponding to the water pump is determined. Transforming the abstract current signal into a quantifiable bubble content solves the technical challenge of "bubbles cannot be directly measured," providing a clear numerical basis for "whether venting is needed," avoiding misjudgments of bubble conditions based solely on current fluctuations, and improving control accuracy. If the current bubble content is greater than or equal to a preset bubble content threshold, an alarm message is sent to the preset controller corresponding to the overall machine controller, and the electronic valve on the water pump's reservoir is opened for active venting. On the one hand, by sending alarm information to the preset controller, operators can be aware of the bubble level in real time, preventing hidden faults. On the other hand, the dedicated kettle electronic valve actively vents air, specifically removing accumulated bubbles from the system. This solves the problem of decreased heat dissipation efficiency and accelerated system aging caused by the lack of active venting in existing technologies, improving the reliability of the cooling system. The electronic valve closes when the current bubble content is below the preset bubble content threshold. This timely venting prevents coolant loss caused by prolonged valve opening, prevents external air from re-entering the system, ensures the durability of the venting effect, and reduces valve operating energy consumption, balancing system stability and energy saving requirements.

[0135] This embodiment also provides a heat dissipation device for an entire engineering machinery unit. This device is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0136] This embodiment provides a heat dissipation device for the entire construction machinery, such as... Figure 8 As shown, it includes: The acquisition module 701 is used to acquire the current working status and current temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data; The control module 702 is used to control the water pump and / or fan in the heat dissipation system of the construction machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the construction machinery.

[0137] In some optional implementations, the control module 702 is specifically used to determine whether the current temperature data meets the temperature triggering condition if the current working state of the construction machinery is the whole machine power-on state or the whole machine charging state; if the current temperature data meets the temperature triggering condition, then control the water pump in the heat dissipation system to work; the temperature triggering condition includes at least one of the following: the current ambient temperature data is greater than a first preset ambient temperature threshold, the current coolant temperature data is greater than a first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than a first preset hydraulic oil temperature threshold.

[0138] In some optional implementations, the control module 702 is further configured to control the water pump in the cooling system to operate if the current coolant temperature data is not within the preset coolant temperature range and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range.

[0139] In some optional implementations, the control module 702 is specifically configured to: if the current working state of the construction machinery is the machine being powered on, detect whether the current ambient temperature data is greater than a second preset ambient temperature threshold; if the current ambient temperature data is greater than the second preset ambient temperature threshold, determine whether the current coolant temperature data is within a preset coolant temperature range and whether the current hydraulic oil temperature data is within a preset hydraulic oil temperature range; if the current coolant temperature data is within a preset coolant temperature range and the current hydraulic oil temperature data is within a preset hydraulic oil temperature range, calculate a first fan speed signal based on the current coolant temperature data and calculate a second fan speed signal based on the current hydraulic oil temperature data; acquire a third fan speed signal requested by the battery thermal management system in the construction machinery; determine a maximum fan speed signal from the first fan speed signal, the second fan speed signal, and the third fan speed signal; and control the fans in the cooling system to operate based on the maximum fan speed signal.

[0140] In some optional implementations, the control module 702 is further configured to determine whether the current ambient temperature data is greater than a first preset ambient temperature threshold if the current coolant temperature data is not within the preset coolant temperature range or the current hydraulic oil temperature data is within the preset hydraulic oil temperature range; if the current ambient temperature data is greater than the first preset ambient temperature threshold, then control the fan to operate at full speed; if the current ambient temperature data is less than or equal to the first preset ambient temperature threshold, then control the fan not to operate.

[0141] In some optional implementations, the control module 702 is specifically used to control the water pump to work if the current working state of the construction machinery is the whole machine charging state; determine whether the current coolant temperature data is within the preset coolant temperature range; if the current coolant temperature data is within the preset coolant temperature range, calculate the first fan speed signal based on the current coolant temperature data; and control the fan to work based on the first fan speed signal.

[0142] In some optional implementations, the control module 702 is specifically used to determine whether the current temperature data meets the preset temperature conditions if the current working state of the construction machinery is the whole machine charging state; if the current temperature data meets the preset temperature conditions, the fan is controlled to work at full speed; the preset temperature conditions include at least one of the following: the current ambient temperature data is not within the preset ambient temperature range, the current coolant temperature data is not within the preset coolant temperature range, and the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range.

[0143] In some alternative implementations, such as Figure 9 As shown, the above-mentioned heat dissipation device for the entire construction machinery also includes: The monitoring module 703 is used to monitor the current current of the water pump in real time if the current working state of the construction machinery is the whole machine power-on state or the whole machine charging state. The determination module 704 is used to determine the current bubble content of the water pump based on the correspondence between the current current and the bubble content of the coolant. The sending module 705 is used to send an alarm message to the preset controller corresponding to the whole machine controller if the current bubble content is greater than or equal to the preset bubble content threshold, and to open the electronic valve on the kettle corresponding to the water pump to actively vent air. The shut-off module 706 is used to close the electronic valve until the current bubble content is less than a preset bubble content threshold.

[0144] The heat dissipation device for construction machinery provided in this embodiment of the invention can execute the heat dissipation method for construction machinery provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the method. Further functional descriptions of the various modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0145] Figure 10 This is a schematic diagram of the structure of a whole machine controller provided in an embodiment of the present invention.

[0146] The following is a detailed reference. Figure 10The diagram illustrates a structural schematic suitable for implementing the overall controller in embodiments of the present invention. The overall controller may include a processor (e.g., a central processing unit, a graphics processing unit, etc.) *01, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) *02 or a program loaded from a memory *08 into a random access memory (RAM) *03. The RAM *03 also stores various programs and data required for the operation of the overall controller. The processor *01, ROM *02, and RAM *03 are interconnected via a bus *04. An input / output (I / O) interface *05 is also connected to the bus *04.

[0147] Typically, the following devices can be connected to the I / O interface*05: input devices*06 including, for example, a touchscreen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; output devices*07 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; memory*08 including, for example, magnetic tape, hard disk, etc.; and communication devices*09. The communication device*09 allows the controller to communicate wirelessly or wiredly with other devices to exchange data. Although the figure* shows a controller with various devices, it should be understood that it is not required to implement or have all the devices shown; alternatively, more or fewer devices may be implemented or included.

[0148] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device *09, or installed from a memory *08, or installed from a ROM *02. When the computer program is executed by a processor *01, it performs the functions defined in the engineering machinery overall heat dissipation method of the embodiments of the present invention.

[0149] Figure 10 The illustrated controller is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0150] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the heat dissipation method for the entire engineering machinery shown in the above embodiments is implemented.

[0151] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0152] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for heat dissipation of an entire engineering machinery machine, characterized in that, The method, applied to a whole-machine controller in engineering machinery, includes: Obtain the current working status and current temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data; Based on the current working status and the current temperature data, the water pump and / or fan in the heat dissipation system of the engineering machinery are controlled to work in order to dissipate heat from the corresponding heat carrier in the engineering machinery. The step of controlling the water pump and / or fan in the cooling system of the engineering machinery to operate according to the current working state and the current temperature data includes: If the current working state of the engineering machinery is the machine being powered on or the machine being charged, determine whether the current temperature data meets the temperature triggering condition. If the current temperature data meets the temperature triggering condition, the water pump in the heat dissipation system is controlled to work; the temperature triggering condition includes at least one of the following: the current ambient temperature data is greater than a first preset ambient temperature threshold, the current coolant temperature data is greater than a first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than a first preset hydraulic oil temperature threshold. If the current working state of the engineering machinery is the whole machine powered on, then detect whether the current ambient temperature data is greater than the second preset ambient temperature threshold. If the current ambient temperature data is greater than the second preset ambient temperature threshold, then it is determined whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range. If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then a first fan speed signal is calculated based on the current coolant temperature data, and a second fan speed signal is calculated based on the current hydraulic oil temperature data. Obtain the third fan speed signal requested by the battery thermal management system in the engineering machinery; The maximum fan speed signal is determined from the first fan speed signal, the second fan speed signal, and the third fan speed signal; Based on the maximum fan speed signal, the fan in the heat dissipation system is controlled to operate; If the current ambient temperature data is less than or equal to the second preset ambient temperature threshold, then determine whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range. If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then the first fan speed signal is calculated based on the current coolant temperature data, and the second fan speed signal is calculated based on the current hydraulic oil temperature data. The fans in the cooling system are controlled to operate based on the first fan speed signal and the second fan speed signal.

2. The method according to claim 1, characterized in that, The method further includes: If the current coolant temperature data is not within the preset coolant temperature range, and / or the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range, then the water pump in the cooling system is controlled to operate.

3. The method according to claim 1, characterized in that, The method further includes: If the current coolant temperature data is not within the preset coolant temperature range, or the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, determine whether the current ambient temperature data is greater than the first preset ambient temperature threshold. If the current ambient temperature data is greater than the first preset ambient temperature threshold, then the fan is controlled to operate at full speed; If the current ambient temperature data is less than or equal to the first preset ambient temperature threshold, then the fan is controlled to not work.

4. The method according to claim 1, characterized in that, The step of controlling the water pump and / or fan in the cooling system of the engineering machinery to operate according to the current working status and the current temperature data includes: If the current working state of the engineering machinery is the whole machine charging state, then control the water pump to work; Determine whether the current coolant temperature data is within the preset coolant temperature range; If the current coolant temperature data is within the preset coolant temperature range, then the first fan speed signal is calculated based on the current coolant temperature data; The fan is controlled to operate based on the first fan speed signal.

5. The method according to claim 1, characterized in that, The step of controlling the water pump and / or fan in the cooling system of the engineering machinery to operate according to the current working status and the current temperature data includes: If the current working state of the engineering machinery is the whole machine charging state, determine whether the current temperature data meets the preset temperature conditions; If the current temperature data meets the preset temperature condition, then control the fan to operate at full speed; The preset temperature conditions include at least one of the following: the current ambient temperature data is not within the preset ambient temperature range, the current coolant temperature data is not within the preset coolant temperature range, and the current hydraulic oil temperature data is not within the preset hydraulic oil temperature range.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: If the current working state of the engineering machinery is the whole machine powered on or the whole machine charging, then the current current of the water pump is monitored in real time. Based on the correspondence between the current current and the coolant bubble content, the current bubble content corresponding to the water pump is determined; If the current bubble content is greater than or equal to the preset bubble content threshold, an alarm message is sent to the preset controller corresponding to the whole machine controller, and the electronic valve on the kettle corresponding to the water pump is opened to actively release air. The electronic valve is closed until the current bubble content is less than the preset bubble content threshold.

7. A heat dissipation device for an entire engineering machinery unit, characterized in that, The device, used as a whole-machine controller in engineering machinery, includes: The acquisition module is used to acquire the current working status and current temperature data of the construction machinery; the current temperature data includes at least one of the current ambient temperature data, current coolant temperature data, and current hydraulic oil temperature data. The control module is used to control the water pump and / or fan in the heat dissipation system of the engineering machinery to work according to the current working status and the current temperature data, so as to dissipate heat from the corresponding heat carrier in the engineering machinery. The step of controlling the water pump and / or fan in the cooling system of the engineering machinery to operate according to the current working state and the current temperature data includes: If the current working state of the engineering machinery is the machine being powered on or the machine being charged, determine whether the current temperature data meets the temperature triggering condition. If the current temperature data meets the temperature triggering condition, the water pump in the heat dissipation system is controlled to work; the temperature triggering condition includes at least one of the following: the current ambient temperature data is greater than a first preset ambient temperature threshold, the current coolant temperature data is greater than a first preset coolant temperature threshold, and the current hydraulic oil temperature data is greater than a first preset hydraulic oil temperature threshold. If the current working state of the engineering machinery is the whole machine powered on, then detect whether the current ambient temperature data is greater than the second preset ambient temperature threshold. If the current ambient temperature data is greater than the second preset ambient temperature threshold, then it is determined whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range. If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then a first fan speed signal is calculated based on the current coolant temperature data, and a second fan speed signal is calculated based on the current hydraulic oil temperature data. Obtain the third fan speed signal requested by the battery thermal management system in the engineering machinery; The maximum fan speed signal is determined from the first fan speed signal, the second fan speed signal, and the third fan speed signal; Based on the maximum fan speed signal, the fan in the heat dissipation system is controlled to operate; If the current ambient temperature data is less than or equal to the second preset ambient temperature threshold, then determine whether the current coolant temperature data is within the preset coolant temperature range and whether the current hydraulic oil temperature data is within the preset hydraulic oil temperature range. If the current coolant temperature data is within the preset coolant temperature range and the current hydraulic oil temperature data is within the preset hydraulic oil temperature range, then the first fan speed signal is calculated based on the current coolant temperature data, and the second fan speed signal is calculated based on the current hydraulic oil temperature data. The fans in the cooling system are controlled to operate based on the first fan speed signal and the second fan speed signal.

8. An engineering machinery, characterized in that, include: A complete machine controller and a heat dissipation system, wherein the complete machine controller includes a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the heat dissipation method for the complete machine of engineering machinery as described in any one of claims 1 to 6.

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