Methanol extended range mine truck thermal management system and strategy

Abstract

The invention provides a thermal management system and method for a methanol extended-range mine truck, and relates to the technical field of mine trucks, the system comprises a methanol engine, a generator, a driving motor, a battery, a domain controller, an intelligent heat exchange module and a temperature sensor, and the methanol engine, the generator, the driving motor, the battery and the domain controller are all provided with pipelines; pipelines of the driving motor, the generator and the methanol engine are directly connected and are connected with the intelligent heat exchange module, and a pipeline of the domain controller and a pipeline of the battery are respectively connected with the heat exchange module. By acquiring the environment temperature and the cooling liquid temperature data, predicting the vehicle operation working condition, accurately calculating the suitable working condition temperature range of each key part and designing the heat exchange strategy, the temperature requirements of each part can be fully met, the cruising ability of a battery is effectively guaranteed, the problem that the cold start of the methanol engine is difficult is solved, and the service life of the methanol engine is prolonged. And reliable guarantee is provided for the service life and safety of all parts, and it is guaranteed that the mine truck can achieve long-endurance safe operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine trucks, in particular to a methanol range-extended mine truck thermal management system and method. BACKGROUND

[0003] Among many alternative fuels, methanol (CH3OH) can be used as a sustainable and widely used energy source because methanol fuel has some incomparable advantages in preparation and use: 1) reducing the burden of energy use and improving the energy security of the country; 2) being a clean energy source, avoiding excessive carbon emissions and reducing pollutant emissions, and having less environmental pollution; 3) contributing to sustainable energy development; 4) as a liquid fuel, methanol can use existing infrastructure in the process of transportation and storage, so methanol fuel is considered as one of the alternative fuels for internal combustion engines.

[0004] At present, methanol range-extended mine trucks are in the stage of rapid popularization and application, and have been batch-delivered and put into use in many mine areas. However, methanol range-extended mine trucks still have problems such as difficulty in cold start, serious battery endurance mileage decay in low-temperature working conditions, and hidden danger of battery thermal runaway in high-temperature working environment.

[0005] Therefore, it is necessary to design a methanol range-extended mine truck thermal management system and method. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a methanol range-extended mine truck thermal management system and method.

[0007] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0008] The present application provides a methanol range-extended mine truck thermal management system, comprising a methanol engine, a generator, a drive motor, a battery and a domain controller, characterized in that it comprises an intelligent heat exchange module and a temperature sensor, the methanol engine, the generator, the drive motor, the battery and the domain controller are all provided with pipelines for connecting with the intelligent heat exchange module for heat exchange, the pipelines of the drive motor, the generator and the methanol engine are directly connected and connected with the intelligent heat exchange module, and the pipelines of the domain controller and the battery are respectively connected with the heat exchange module.

[0009] Preferably, temperature sensors are arranged in the pipelines of the methanol engine, the generator, the drive motor, the battery and the domain controller, and the temperature sensors are electrically connected with the domain controller.

[0010] Preferably, flow valves are arranged on the pipelines connected with the intelligent heat exchange module.

[0011] Preferably, the intelligent heat exchange module comprises a cooling module and a heating module, and the cooling module and the heating module are connected through a switch valve.

[0012] Preferably, the heating module is internally provided with a PTC for heating the cooling liquid inside the heating module.

[0013] The application also provides a methanol range-extended mine truck thermal management method, which is applied to the methanol range-extended mine truck thermal management system and comprises the following steps:

[0014] Step 1: obtaining methanol range-extended mine truck related temperature information;

[0015] Step 2: obtaining vehicle historical working condition information by the domain controller, and formulating a component temperature management strategy based on the vehicle historical working condition information and the methanol range-extended mine truck related temperature information;

[0016] Step 3: controlling the PTC, the flow valve and the switch valve, and realizing heating, cooling and distribution of the cooling liquid according to the component temperature management strategy.

[0017] Preferably, the methanol range-extended mine truck related temperature information comprises an ambient temperature and a component pipeline cooling liquid temperature.

[0018] Preferably, in step 2, the domain controller obtains vehicle historical working condition information, and formulates a component temperature management strategy based on the vehicle historical working condition information and the methanol range-extended mine truck related temperature information, specifically as follows:

[0019] Low-temperature environment strategy: obtaining an ambient temperature, if the ambient temperature is less than or equal to-10℃, obtaining a cooling liquid temperature of a battery pipeline, if the cooling liquid temperature of the battery pipeline is less than or equal to-10℃, the domain controller judges whether the vehicle is started, if the vehicle is not started, the domain controller starts the PTC to heat the cooling liquid inside the heating module, opens the flow valve connected with the battery pipeline line, closes the remaining flow valves and switch valves, and raises the cooling liquid temperature of the battery pipeline to 0℃, the domain controller obtains vehicle historical working condition information, predicts a vehicle starting time, and obtains a PTC heating power, an ambient temperature and a methanol engine pipeline cooling liquid temperature, calculates a time for heating the methanol engine pipeline cooling liquid to a starting temperature based thereon, and obtains a time for heating the methanol engine pipeline cooling liquid in advance based on the predicted vehicle starting time and the time for heating to the starting temperature;

[0020] If the vehicle is started, the domain controller closes the PTC, opens the switch valve, the methanol engine pipeline flow valve and the battery pipeline flow valve, and transports the high-temperature cooling liquid of the methanol engine pipeline into the battery pipeline, so as to ensure that the methanol engine, the generator, the drive motor and the battery are all in the optimal temperature range.

[0021] High temperature environment strategy: if the environment temperature is greater than or equal to 30 DEG C, the cooling liquid temperature of the battery pipeline is obtained, if the cooling liquid temperature of the battery pipeline is greater than or equal to 30 DEG C, the domain controller calls the historical energy consumption curve under the same road condition and similar load in a period of time, before the battery runs in the high-power demand stage, the opening of the flow valve of the methanol engine pipeline and the flow valve of the domain controller pipeline is adjusted, the engine water temperature and the domain controller water temperature are adjusted to the highest limit temperature, and the flow valve of the battery pipeline is adjusted to the maximum opening to reduce the battery temperature to the maximum limit.

[0022] According to the specific embodiments provided by the application, the following technical effects are disclosed:

[0023] The application provides a methanol extended-range mine truck thermal management system and method, which comprises a methanol engine, a generator, a driving motor, a battery, a domain controller, an intelligent heat exchange module and a temperature sensor, wherein the methanol engine, the generator, the driving motor, the battery and the domain controller are all provided with pipelines for being connected with the intelligent heat exchange module to perform heat exchange, the pipelines of the driving motor, the generator and the methanol engine are directly connected and connected with the intelligent heat exchange module, and the pipeline of the domain controller and the pipeline of the battery are connected with the heat exchange module respectively; the method comprises obtaining methanol extended-range mine truck related temperature information, obtaining vehicle historical working condition information by the domain controller, formulating component temperature management strategies based on the vehicle historical working condition information and the methanol extended-range mine truck related temperature information, controlling PTC, flow valves and switch valves, and realizing heating, cooling and distribution of the cooling liquid according to the component temperature management strategies. The system of the application can accurately calculate the suitable working condition temperature range of each key part by obtaining environment temperature and cooling liquid temperature data and predicting the working condition of the vehicle, and can fully meet the temperature requirements of each part by means of advanced thermal management strategies and methods, thereby effectively guaranteeing the endurance of the battery, solving the problem of cold start difficulty of the methanol engine, providing reliable guarantee for the service life of each part, and laying a solid foundation for realizing long-endurance safe operation of the mine truck. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 The application provides a methanol extended-range mine truck thermal management system structure schematic diagram.

[0026] Figure 2 The application provides a methanol extended-range mine truck thermal management method flowchart schematic diagram.

[0027] Reference signs: 1, methanol engine; 2, generator; 3, drive motor; 4, domain controller; 5, battery; 6, switch valve; 7, intelligent heat exchange module; 8, PTC. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] The purpose of the present application is to provide a methanol range-extended mine truck thermal management system and method. By obtaining environmental temperature and coolant temperature data and predicting the operating conditions of the vehicle, the appropriate operating temperature range of each key part is accurately calculated. On this basis, with the help of advanced thermal management strategies and methods, the temperature requirements of each part can be fully met, not only effectively ensuring the endurance of the battery and solving the problem of cold start difficulty of the methanol engine, but also providing reliable protection for the service life of each part, thereby laying a solid foundation for the long-endurance safe operation of the mine truck.

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] As shown in Figure 1 The present application provides a methanol range-extended mine truck thermal management system, which comprises a methanol engine, a generator 2, a drive motor 3, a battery 5, a domain controller 4, an intelligent heat exchange module 7 and a temperature sensor. The methanol engine, the generator 2, the drive motor 3, the battery 5 and the domain controller 4 are all provided with pipelines for connecting with the intelligent heat exchange module 7 for heat exchange.

[0032] It should be noted that the optimal working temperatures of the drive motor 3, the generator 2 and the methanol engine coincide, so the pipelines of the drive motor 3, the generator 2 and the methanol engine are directly connected and connected with the intelligent heat exchange module 7.

[0033] The pipelines of the domain controller 4 and the pipelines of the battery 5 are respectively connected with the heat exchange module.

[0034] Temperature sensors are arranged in the pipelines of the methanol engine, the generator 2, the drive motor 3, the battery 5 and the domain controller 4, and the temperature sensors are electrically connected with the domain controller 4.

[0035] The pipeline connected with the intelligent heat exchange module 7 is provided with a flow valve.

[0036] The intelligent heat exchange module 7 comprises a cooling module and a heating module, and the cooling module and the heating module are communicated through a switch valve 6, wherein the cooling module has a large volume, and the heating module has a small volume.

[0037] The heating module is internally provided with a PTC 8 for heating the cooling liquid in the heating module.

[0038] For the convenience of description, the flow valves are described in the application, wherein the flow valve connected with the battery 5 is a flow valve V1, the flow valve connected with the methanol engine 1 is a flow valve V2, and the flow valve connected with the domain controller 4 is a flow valve V3.

[0039] As shown in Figure 2 The application further provides a methanol extended-range mine truck thermal management method applied to the methanol extended-range mine truck thermal management system.

[0040] Step 1: obtaining methanol extended-range mine truck related temperature information;

[0041] Step 2: the domain controller 4 obtains vehicle historical working condition information, and formulates a component temperature management strategy based on the vehicle historical working condition information and the methanol extended-range mine truck related temperature information;

[0042] Step 3: controlling the PTC 8, the flow valve and the switch valve 6 to realize heating, cooling and distribution of the cooling liquid according to the component temperature management strategy.

[0043] The methanol extended-range mine truck related temperature information comprises an environmental temperature and a component pipeline cooling liquid temperature.

[0044] In step 2, the domain controller 4 obtains vehicle historical working condition information, and formulates a component temperature management strategy based on the vehicle historical working condition information and the methanol extended-range mine truck related temperature information, specifically as follows:

[0045] Firstly, the strategy under a low-temperature environment is introduced: the available capacity of the battery 5 begins to decrease at about 0℃, and the capacity is attenuated by about 40% at-10℃, therefore, the battery 5 cooling liquid temperature-10℃ is set as a first threshold value, the environmental temperature is obtained, if the environmental temperature is less than or equal to-10℃, the cooling liquid temperature of the battery 5 pipeline is obtained, if the cooling liquid temperature of the battery 5 pipeline is less than or equal to-10℃, the domain controller 4 judges whether the vehicle is started, if the vehicle is not started, the domain controller 4 starts the PTC 8 to heat the cooling liquid in the heating module, opens the flow valve V1 connected with the battery 5 pipeline, and closes the remaining flow valves and the switch valve 6, so that the cooling liquid temperature of the battery 5 pipeline is raised to 0℃, and the capacity of the battery 5 is ensured not to be attenuated.

[0046] Domain Controller 4 obtains historical operating information of the vehicle (calls the vehicle's operating dynamics in the past few months), predicts the vehicle's start time, and obtains the heating power of PTC8, ambient temperature, and coolant temperature of the methanol engine 1 pipeline. Based on this, it calculates the time it takes for the coolant in the methanol engine 1 pipeline to heat up to the start temperature. Based on the predicted vehicle start time and the time it takes to heat up to the start temperature, it obtains the time to preheat the coolant in the methanol engine 1 pipeline, thereby preheating the engine water temperature and reducing the engine start-up preheating time.

[0047] When the vehicle starts, the heat from combustion in the cylinder is transferred to the engine coolant temperature, which gradually rises. To ensure that the engine coolant temperature is maintained at around 90°C, domain controller 4 shuts down PTC8 and opens switch valve 6, flow valve V2 of methanol engine 1 pipe, and flow valve V1 of battery 5 pipe. This delivers the high-temperature coolant from methanol engine 1 pipe to battery 5 pipe, ensuring that methanol engine 1, generator 2, drive motor 3, and battery 5 are all within their optimal temperature range. At this time, the battery 5 temperature is maintained at around 20°C, and the optimal operating temperature of generator 2 and drive motor 3 is 80-100°C. The engine coolant temperature is just right, so the engine coolant can be directly delivered to generator 2 and drive motor 3.

[0048] The optimal temperature range for domain controller 4 is 25℃-70℃. Therefore, the optimal suitable temperature for domain control is ensured by controlling the flow valve V3.

[0049] High-Temperature Environment Strategy: In high-temperature environments, battery 5 will also experience significant capacity degradation and thermal runaway risks when its temperature exceeds 50°C. Therefore, a second threshold of 30°C is set for the battery 5 coolant. If the ambient temperature is greater than or equal to 30°C, the coolant temperature of the battery 5 pipeline is obtained. If the coolant temperature of the battery 5 pipeline is greater than or equal to 30°C, domain controller 4 retrieves historical energy consumption curves under similar road conditions and loads within the past 3 months. Before the battery 5 operates at high power demand, the opening of flow valve V2 in the methanol engine 1 pipeline and flow valve V3 in the domain controller 4 pipeline is adjusted to reduce the cooling demand on the heat exchange module. The engine water temperature and domain controller water temperature are adjusted to the maximum limit temperature. The flow valve V1 in the battery 5 pipeline is adjusted to the maximum opening to reduce the battery 5 temperature to the maximum extent, thereby buffering the rapid temperature rise of battery 5 during the high-power output phase, protecting battery 5 to maintain a good condition, and reducing the risk of thermal runaway.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0051] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A methanol range extender mining truck thermal management system, comprising: A methanol engine, generator, drive motor, battery, and domain controller are characterized by comprising: an intelligent heat exchange module and a temperature sensor. The methanol engine, generator, drive motor, battery, and domain controller are all equipped with pipes for connection to the intelligent heat exchange module for heat exchange. The pipes of the drive motor, generator, and methanol engine are directly connected to the intelligent heat exchange module. The pipes of the domain controller and the battery are respectively connected to the heat exchange module.

2. The system according to claim 1, characterized in that, Temperature sensors are installed inside the pipes of the methanol engine, generator, drive motor, battery, and domain controller, and the temperature sensors are electrically connected to the domain controller.

3. The system according to claim 2, characterized in that, Flow valves are installed on the pipes connected to the intelligent heat exchange module.

4. The system according to claim 3, characterized in that, The intelligent heat exchange module includes a cooling module and a heating module, and the cooling module and the heating module are connected by a switching valve.

5. The system according to claim 4, characterized in that, The heating module is equipped with a PTC (Potential Temperature Coefficient) for heating the coolant inside the module.

6. A method for thermal management of methanol range extender mining trucks, characterized in that, The methanol range extender mining truck thermal management system according to any one of claims 1-5 comprises: Step 1: Obtain relevant temperature information for methanol range extender mining trucks; Step 2: The domain controller obtains historical operating condition information of the vehicle and formulates temperature management strategies for each component based on the historical operating condition information of the vehicle and the relevant temperature information of the methanol range extender mining truck. Step 3: Control the PTC, flow valve and on / off valve to achieve the heating, cooling and distribution of coolant according to the temperature management strategy of each component.

7. The method according to claim 6, characterized in that, The relevant temperature information for the methanol range extender mining truck includes the ambient temperature and the coolant temperature of each component's pipeline.

8. The method according to claim 7, characterized in that, In step 2, the domain controller acquires historical vehicle operating condition information. Based on this information and the relevant temperature information of the methanol range-extended mining truck, it formulates temperature management strategies for each component, specifically: Low-temperature environment strategy: Obtain the ambient temperature. If the ambient temperature is less than or equal to -10℃, obtain the coolant temperature of the battery pipeline. If the coolant temperature of the battery pipeline is less than or equal to -10℃, the domain controller determines whether the vehicle is started. If the vehicle is not started, the domain controller starts the PTC to heat the coolant inside the heating module and opens the flow valve connected to the battery pipeline, closes the other flow valves and switching valves, and raises the coolant temperature of the battery pipeline to 0℃. The domain controller obtains the vehicle's historical operating condition information, predicts the vehicle's start time, and obtains the PTC heating power, ambient temperature, and coolant temperature of the methanol engine pipeline. Based on this, it calculates the time for the coolant in the methanol engine pipeline to be heated to the start temperature. Based on the predicted vehicle start time and the time for heating to the start temperature, it obtains the time to preheat the coolant in the methanol engine pipeline. If the vehicle starts, the domain controller shuts down the PTC and opens the switching valve, the flow valve of the methanol engine pipeline, and the flow valve of the battery pipeline to deliver the high-temperature coolant from the methanol engine pipeline to the battery pipeline, in order to ensure that the methanol engine, generator, drive motor and battery are all within the optimal temperature range. High-temperature environment strategy: If the ambient temperature is greater than or equal to 30°C, obtain the coolant temperature of the battery pipeline. If the coolant temperature of the battery pipeline is greater than or equal to 30°C, the domain controller calls the historical energy consumption curve under the same road conditions and similar loads over a period of time. Before the battery operates at high power demand, adjust the opening of the flow valve of the methanol engine pipeline and the flow valve of the domain controller pipeline to adjust the engine water temperature and the domain controller water temperature to the maximum limit temperature. Adjust the flow valve of the battery pipeline to the maximum opening to reduce the battery temperature to the maximum extent.

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