Thermal management method and equipment for pure electric engineering vehicle and medium

Abstract

The invention discloses a thermal management method and device for a pure electric engineering vehicle and a medium, the thermal management method and device are applied to a pure electric thermal management control system, the pure electric thermal management control system comprises a battery pack thermal management module and a motor thermal management module, and the method comprises the steps that corresponding temperature data are collected; based on a preset thermal management rule, determining a set temperature combination; and if the temperature combination exists, and all the temperature data in the temperature combination reach the respective corresponding temperature threshold, selecting an adaptive thermal management mode according to the temperature level of the reached temperature threshold, and executing a thermal management action on the thermal management target. By setting the corresponding temperature combination, the thermal state of the whole vehicle can be comprehensively reflected in multiple dimensions, and whether thermal management needs to be executed or not is judged, so that thermal management can be carried out on local conditions by combining the comprehensive thermal management requirement of a whole vehicle system, and the overall performance and efficiency of the vehicle are improved.

Description

Technical Field

[0001] This application relates to the field of engineering vehicles, specifically to a thermal management method, equipment, and medium for pure electric engineering vehicles. Background Technology

[0002] Thermal management of engineering vehicles refers to the regulation and management of the temperature of targets (including various equipment or areas) within the vehicle. Traditional thermal management of engineering vehicles typically relies on a single temperature parameter to determine whether corresponding thermal management measures need to be activated. For example, when a sensor detects that the temperature of a certain piece of equipment or area exceeds a preset threshold, the system automatically activates the cooling equipment.

[0003] While this method can manage temperature in localized situations to some extent, the judgment rules based on a single parameter often overlook the comprehensive thermal management needs of the entire vehicle system. Engineering vehicles typically operate under complex environmental conditions, and different components and systems within the vehicle may be subjected to varying degrees of thermal load. A single temperature detection method cannot comprehensively reflect the thermal state of the entire vehicle, thus affecting its overall performance and efficiency. Summary of the Invention

[0004] To address the aforementioned issues, this application proposes a thermal management method for pure electric engineering vehicles, applied in a pure electric thermal management control system. The pure electric thermal management control system includes: a battery pack thermal management module and a motor thermal management module. The battery pack thermal management module includes a battery pack, a first water pump, a low-temperature radiator, a plate heat exchanger, and an air conditioning circuit. The outlet of the first water pump is connected to the inlet of the battery pack cooling pipe. The low-temperature radiator is equipped with a first cooling fan. The plate heat exchanger is connected to both its branch circuit and the air conditioning circuit. The plate heat exchanger branch circuit is connected to the battery pack cooling pipe, and the plate heat exchanger facilitates heat exchange between the plate heat exchanger branch circuit and the air conditioning circuit. The motor thermal management module includes a motor, a second water pump, and a water-cooled radiator. The water-cooled radiator is equipped with a second cooling fan. The outlet of the second water pump is connected to the inlet of the motor cooling pipe.

[0005] The method includes:

[0006] Based on the sensors installed in the engineering vehicle, corresponding temperature data is collected; wherein, the temperature data includes at least: the battery temperature corresponding to the battery pack, the motor temperature corresponding to the motor, the cab temperature corresponding to the cab, the first outlet water temperature corresponding to the first water pump, the second outlet water temperature corresponding to the second water pump, and the ambient temperature of the engineering vehicle.

[0007] Based on preset thermal management rules, a set temperature combination is determined; wherein, the temperature combination contains at least multiple temperature data and a temperature threshold corresponding to each temperature data, and the temperature threshold corresponding to each temperature data contains one or more temperature levels; each temperature combination is set with a corresponding thermal management target.

[0008] If a temperature combination exists in which all temperature data have reached their respective temperature thresholds, then based on the temperature level of the reached temperature thresholds, an appropriate thermal management method is selected, and thermal management actions are performed on the thermal management target.

[0009] On the other hand, this application also proposes a thermal management device for pure electric engineering vehicles, comprising:

[0010] At least one processor; and,

[0011] A memory communicatively connected to the at least one processor; wherein,

[0012] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform, for example, the thermal management method for pure electric engineering vehicles described in the above example.

[0013] On the other hand, this application also proposes a non-volatile computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured as: the thermal management method for pure electric engineering vehicles described in the above example.

[0014] The thermal management method for pure electric engineering vehicles proposed in this application can bring the following beneficial effects:

[0015] By setting appropriate temperature combinations, the thermal state of the entire vehicle can be comprehensively reflected in multiple dimensions to determine whether thermal management is required. This allows for the integration of comprehensive thermal management needs across the entire vehicle system, enabling thermal management of specific situations and improving the overall performance and efficiency of the vehicle. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a flowchart illustrating the thermal management method for pure electric engineering vehicles in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of a pure electric heating management and control system under one scenario, as described in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the thermal management equipment for a pure electric engineering vehicle in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, this application provides a thermal management method for pure electric engineering vehicles, which is applied to a pure electric thermal management control system. The pure electric thermal management control system is installed on the engineering vehicle. Engineering vehicles typically refer to special vehicles and mechanical equipment used for construction, infrastructure construction, and other heavy engineering projects. They may include excavators, bulldozers, cranes, road rollers, etc. The pure electric thermal management control system includes multiple modules, and each module can be installed at different locations on the main body of the engineering vehicle, such as the side, chassis, or interior of the main body.

[0023] The pure electric thermal management control system includes a battery pack thermal management module and a motor thermal management module, which are used to achieve thermal management of the battery pack and motor of the engineering vehicle, respectively.

[0024] like Figure 2 As shown, the battery pack thermal management module includes a battery pack, a first water pump, a low-temperature radiator, a plate heat exchanger, and an air conditioning circuit. The outlet of the first water pump is connected to the inlet of the battery pack cooling pipe. The low-temperature radiator is equipped with a first cooling fan. The plate heat exchanger is connected to both the plate heat exchanger branch and the air conditioning circuit. The plate heat exchanger branch is connected to the battery pack cooling pipe. The plate heat exchanger is used for heat exchange between the plate heat exchanger branch and the air conditioning circuit.

[0025] The motor thermal management module includes a motor, a second water pump, and a water-cooled radiator. The water-cooled radiator is equipped with a second cooling fan. The outlet of the second water pump is connected to the inlet of the motor cooling pipe.

[0026] The water pump supplies coolant at room temperature (e.g., water or other liquids with similar capabilities). As the coolant passes the battery pack or motor, it exchanges heat with the battery pack or motor, thus dissipating heat. After heat exchange, the coolant is further cooled by devices such as low-temperature radiators, plate heat exchangers, and water-cooled radiators, before flowing back to the water pump for reuse in cooling the battery pack or motor.

[0027] like Figure 1 As shown, the method includes:

[0028] S101: Based on the sensors installed in the engineering vehicle, collect the corresponding temperature data; wherein, the temperature data includes at least: the battery temperature corresponding to the battery pack, the motor temperature corresponding to the motor, the cab temperature corresponding to the cab, the first outlet water temperature corresponding to the first water pump, the second outlet water temperature corresponding to the second water pump, and the ambient temperature of the engineering vehicle.

[0029] Sensors are pre-installed at various locations on the engineering vehicle to collect relevant temperature data. For example, a temperature sensor is installed in the cab to collect the cab temperature, multiple temperature sensors are installed in the battery pack thermal management module to collect the battery temperature and the first outlet water temperature, multiple temperature sensors are installed in the motor thermal management module to collect the motor temperature and the second outlet water temperature, and a temperature sensor is installed on the exterior of the engineering vehicle to collect the ambient temperature.

[0030] S102: Based on preset thermal management rules, determine the set temperature combinations; wherein, the temperature combination includes at least multiple temperature data and a temperature threshold corresponding to each temperature data, and the temperature threshold corresponding to each temperature data includes one or more temperature levels; each temperature combination is set with a corresponding thermal management target.

[0031] Each temperature combination includes multiple temperature data. When each temperature data reaches its corresponding temperature threshold, the thermal management target corresponding to the temperature combination is considered to need to be adjusted by thermal management. Then, according to the thermal management method corresponding to the temperature combination, the thermal management target is cooled, heated, or subjected to other forms of thermal management.

[0032] Thermal management rules typically include multiple temperature combinations, and the temperature data, thermal management objectives, or temperature levels contained in each combination may differ. If the collected temperature data simultaneously satisfies multiple temperature combinations, then the corresponding thermal management methods are executed simultaneously based on these multiple temperature combinations.

[0033] S103: If there is a temperature combination in which all the temperature data has reached (rising or falling) their respective temperature thresholds, then according to the temperature level of the temperature thresholds reached, an appropriate thermal management method is selected, and thermal management actions are performed on the thermal management target.

[0034] One or more temperature levels are set for each temperature threshold. When a temperature threshold includes multiple temperature levels, it means that the temperature threshold has multiple values. When a temperature data satisfies any one of the temperature levels of its corresponding temperature threshold, the temperature data is considered to satisfy the temperature threshold and satisfy that temperature level.

[0035] If every temperature data point in a temperature combination meets the temperature threshold requirements, the temperature level that each temperature data point meets is further determined. When temperature data reaches a temperature threshold, it indicates that the temperature data already has an anomaly or is about to have an anomaly. Different temperature levels indicate the degree of anomaly of the temperature data. Generally speaking, the higher the temperature level reached by the temperature data, the more severe its anomaly.

[0036] Based on the temperature levels reached by each temperature data point in the temperature combination, the overall degree of anomaly is assessed from the perspective of the entire vehicle, thereby selecting the most suitable thermal management method. Of course, when determining each thermal management method, the assessment can be based on the temperature levels reached by some or all of the temperature data points.

[0037] In addition, the temperature threshold and the temperature levels may differ for the same temperature data in different temperature combinations. In such cases, the classification can be determined based on the actual situation.

[0038] In one embodiment, such as Figure 2 As shown, the motor thermal management module includes a main drive motor branch and an auxiliary drive motor branch; the main drive motor branch contains the main drive motor, and the auxiliary drive motor branch contains the auxiliary drive motor. Normally, the main drive motor operates; when the main drive motor malfunctions or its efficiency is insufficient to meet the demands, the auxiliary drive motor operates independently or synchronously.

[0039] The main drive motor branch and the auxiliary drive motor branch are set up independently. Each branch is equipped with a corresponding second water pump and water-cooled radiator. When one motor is working, its temperature is collected as the motor temperature. When both motors are working simultaneously, it is assumed that two motor temperatures exist simultaneously, and separate thermal management is applied to each motor.

[0040] The water-cooled radiators in the main drive motor branch and the auxiliary drive motor branch are set close together. Compared with setting them separately, this can reduce the energy consumption of the second cooling fan when the two water-cooled radiators are dissipating heat.

[0041] In one embodiment, the preset thermal management rules include at least a first temperature combination, the temperature data of the first temperature combination including battery temperature and ambient temperature, the battery temperature and ambient temperature corresponding to a first temperature threshold and a second temperature threshold, respectively, and the thermal management target is the battery pack.

[0042] The first temperature threshold is set with six temperature levels, from low to high. The first, third, and fifth temperature levels are used to determine whether to disable the corresponding thermal management mode, while the second, fourth, and sixth temperature levels are used to determine whether to enable the corresponding thermal management mode. The second temperature threshold is also set with three temperature levels, from low to high. The temperature difference between each temperature level can be set between 2°C and 5°C, based on actual conditions.

[0043] Based on this, when selecting an appropriate thermal management method, if the battery temperature reaches the second temperature level, it is considered that the battery needs to be cooled. The appropriate thermal management method is to turn on the first water pump and make the low-temperature heat sink branch where the low-temperature heat sink is located open, so that the coolant can pass through the low-temperature heat sink branch to cool the battery pack.

[0044] If the battery temperature reaches the fourth temperature level, it is considered that a more powerful cooling method is needed. In this case, the appropriate thermal management method is to turn on the first cooling fan of the low-temperature heat sink to further enhance the cooling capacity.

[0045] If the battery temperature reaches level six, a more powerful cooling method is considered necessary. The appropriate thermal management approach is to simultaneously activate the low-temperature radiator branch, the plate heat exchanger branch, and the air conditioning circuit. This allows the coolant to cool the battery pack via the low-temperature radiator branch and the plate heat exchanger branch. Part of the coolant still flows through the low-temperature radiator branch, where it is dissipated by airflow, while the other part flows through the plate heat exchanger branch, where it is cooled through heat exchange. Although activating the air conditioning circuit increases energy consumption, maintaining the battery's normal temperature is the priority at this time.

[0046] When shutting down the corresponding cooling method, considering that relying solely on battery temperature for judgment may result in fluctuating battery temperatures, an ambient temperature judgment is added at this point. For example, if the battery temperature is below the sixth temperature level, shutting down the plate heat exchanger branch and the air conditioning circuit may cause the battery temperature to rise back to the sixth temperature level due to insufficient cooling capacity.

[0047] Based on this, if the battery temperature is below the fifth temperature level (which is below the sixth temperature level) and the ambient temperature is below the first temperature level, it is considered that although the current battery temperature is still high, the current environment has a strong cooling capacity for the battery temperature. Therefore, the appropriate thermal management method is to shut down the plate heat exchanger branch and the air conditioning circuit, and dissipate heat through the low-temperature radiator.

[0048] If the battery temperature is below the third temperature level (which is below the fourth temperature level) and the ambient temperature is below the second temperature level, it is considered that although the current battery temperature is slightly high, the ambient temperature is also relatively low. Therefore, the appropriate thermal management method is to turn off the first cooling fan of the low-temperature heat sink and only use the water pump for cooling.

[0049] If the battery temperature is below the first temperature level and the ambient temperature is below the third temperature level, it is considered that the current battery temperature is already low and the ambient temperature is not too high. The appropriate thermal management method is to turn off the first water pump and not to cool the battery pack.

[0050] Furthermore, the air conditioning circuit includes at least a compressor, a condenser, an electronic expansion valve, and an evaporator. At this point, the temperature data of the first temperature combination also includes the first outlet water temperature, which corresponds to a third temperature threshold. The third temperature threshold has multiple temperature levels set sequentially from low to high.

[0051] At this point, if the low-temperature radiator branch, plate heat exchanger branch, and air conditioning circuit are all connected simultaneously to cool the battery pack, the compressor speed is set according to the temperature level reached by the first outlet water temperature. The higher the temperature level reached by the first outlet water temperature, the higher the temperature of the coolant is after the coolant has finished cooling the battery pack. At this time, the compressor in the air conditioning circuit needs to provide higher cooling capacity to cool the coolant, so as to facilitate the coolant to cool the battery pack. Therefore, the compressor speed is higher at this time.

[0052] Furthermore, since the battery pack has a certain volume and area, the temperature at different locations may vary. Therefore, the battery temperature includes the average cell temperature and the maximum cell temperature. Generally speaking, the maximum cell temperature may be about 1°C to 2°C higher than the average cell temperature. In this case, both the average cell temperature and the maximum cell temperature have their own corresponding first temperature thresholds. Each temperature level in the first temperature threshold corresponding to the average cell temperature is lower than the corresponding temperature level in the first temperature threshold corresponding to the maximum cell temperature, typically with a difference of 1°C to 2°C.

[0053] Based on this, when determining whether the battery temperature has reached the second, fourth, or sixth temperature level, that is, whether the battery temperature has reached the temperature level required to activate thermal management, the judgment conditions are relatively lenient in order to ensure the health of the battery pack. It is only necessary for either the average temperature of the cell or the highest temperature of the cell to reach its corresponding temperature level, and then the battery temperature is considered to have reached the corresponding temperature level.

[0054] When determining whether the battery temperature is below the first, third, or fifth temperature level, that is, when determining whether the battery temperature has reached the temperature level required to turn off thermal management, in order to ensure the health of the battery pack, the judgment conditions are relatively strict. Both the average temperature and the maximum temperature of the cells must be lower than their respective temperature levels before the battery temperature is considered to be below the corresponding temperature level.

[0055] Of course, in addition to the compressor, condenser, electronic expansion valve, and evaporator mentioned above, an air conditioning circuit can also include a heater. In this case, the air conditioning circuit will at least include a compressor, heater, electronic expansion valve, and evaporator. Whether or not a condenser is included depends on whether the required cooling capacity is needed in the actual situation.

[0056] At this time, the first temperature threshold corresponding to the battery temperature also includes a seventh temperature level and an eighth temperature level. The seventh temperature level is lower than the eighth temperature level, and the eighth temperature level is lower than the first temperature level. In other words, the seventh temperature level and the eighth temperature level refer to the temperature levels when the temperature is lower.

[0057] If the battery temperature reaches the seventh temperature level, it is considered that the current battery temperature is very low. The appropriate thermal management method is to turn on the first water pump and connect the plate heat exchanger branch and the air conditioning circuit so that the coolant passes through the plate heat exchanger branch and heats the battery pack through the heater. At this time, the role of the coolant is to heat the battery pack.

[0058] Of course, if the battery temperature rises and reaches the eighth temperature level, it is considered that heating can be stopped. At this time, the appropriate thermal management method is to shut down the first water pump and shut down the plate heat exchanger branch and the air conditioning circuit.

[0059] In one embodiment, the preset thermal management rules further include a second temperature combination, which includes ambient temperature and cab temperature. The ambient temperature and cab temperature correspond to a second temperature threshold (of course, the specific value of the second temperature threshold here may be different from the specific value of the second temperature threshold in the first temperature combination mentioned above) and a fourth temperature threshold, respectively. The thermal management target is the cab. The second temperature threshold and the fourth temperature threshold are set with a single temperature level.

[0060] Based on this, when selecting an appropriate thermal management method, if the cab temperature reaches the fourth temperature threshold and the ambient temperature reaches the second temperature threshold, the cab temperature is considered to be too high and the cab needs to be cooled. In this case, the appropriate thermal management method is to turn on the air conditioning circuit to cool the cab.

[0061] Of course, there is another scenario: if the air conditioning circuit is already operational and used to cool the battery pack, then the cooling priority for the cab is lower than that for the battery pack. Generally speaking, considering that cooling the battery pack is crucial to the operation of the entire engineering vehicle, it is more important and therefore has a higher cooling priority. This higher priority can be achieved by controlling the opening of the corresponding expansion valve to allow more cooling flow into the battery pack cooling module.

[0062] In one embodiment, the preset thermal management rules also include a third temperature combination. The temperature data of the third temperature combination includes the motor temperature and the second outlet water temperature. The motor temperature and the second outlet water temperature correspond to the fifth temperature threshold and the sixth temperature threshold, respectively. The thermal management target is the motor.

[0063] The fifth temperature threshold is set with the first to fourth temperature levels sequentially from low to high, and the sixth temperature threshold is set with the first to second temperature levels sequentially from low to high.

[0064] Based on this, when selecting the appropriate thermal management method, if the motor temperature reaches the second temperature level and the second outlet water temperature reaches the first temperature level, it is considered that the current motor temperature is too high and cooling treatment is required. Therefore, the appropriate thermal management method is: turn on the second water pump and make the water-cooled radiator branch where the water-cooled radiator is located open, so that the coolant passes through the water-cooled radiator branch to cool the motor.

[0065] If the motor temperature reaches the fourth temperature level and the second outlet water temperature reaches the second temperature level, it is considered that the motor temperature is higher. Therefore, the appropriate thermal management method is to turn on the second cooling fan of the water-cooled radiator to further improve the cooling capacity.

[0066] If the motor temperature is lower than the third temperature level and the second outlet water temperature is lower than the second temperature level, it is considered that the current motor temperature has been cooled and is controllable. Therefore, the appropriate thermal management method is to turn off the second cooling fan of the water-cooled radiator branch and cool it only through the water-cooled radiator itself, thereby reducing energy consumption.

[0067] If the motor temperature is lower than the first temperature level and the second outlet water temperature is lower than the first temperature level, the current motor temperature is considered to be a healthy temperature and no further cooling is needed. In this case, the appropriate thermal management method is to shut down the second water pump.

[0068] like Figure 3As shown in the illustration, this application also provides a thermal management device for a pure electric engineering vehicle, comprising:

[0069] At least one processor; and,

[0070] A memory communicatively connected to the at least one processor; wherein,

[0071] The memory stores instructions that can be executed by the at least one processor, which, when executed, enable the at least one processor to perform a thermal management method for pure electric engineering vehicles as described in any of the above embodiments.

[0072] This application also provides a non-volatile computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured as: the thermal management method for pure electric engineering vehicles described in any of the above embodiments.

[0073] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device and medium embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the description of the method embodiments.

[0074] The devices and media provided in this application are one-to-one with the methods. Therefore, the devices and media also have similar beneficial technical effects as their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0075] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0077] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0078] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0079] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0080] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0081] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0082] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A thermal management method for a pure electric engineering vehicle, characterized in that, This invention relates to a pure electric thermal management control system, comprising: a battery pack thermal management module and a motor thermal management module. The battery pack thermal management module includes a battery pack, a first water pump, a low-temperature radiator, a plate heat exchanger, and an air conditioning circuit. The outlet of the first water pump is connected to the inlet of the battery pack cooling pipe. The low-temperature radiator is equipped with a first cooling fan. The plate heat exchanger is connected to both its branch circuit and the air conditioning circuit. The plate heat exchanger branch circuit is connected to the battery pack cooling pipe, and the plate heat exchanger facilitates heat exchange between the plate heat exchanger branch circuit and the air conditioning circuit. The motor thermal management module includes a motor, a second water pump, and a water-cooled radiator. The water-cooled radiator is equipped with a second cooling fan. The outlet of the second water pump is connected to the inlet of the motor cooling pipe. The method includes: Based on the sensors installed in the engineering vehicle, corresponding temperature data is collected; wherein, the temperature data includes at least: the battery temperature corresponding to the battery pack, the motor temperature corresponding to the motor, the cab temperature corresponding to the cab, the first outlet water temperature corresponding to the first water pump, the second outlet water temperature corresponding to the second water pump, and the ambient temperature of the engineering vehicle. Based on preset thermal management rules, a set temperature combination is determined; wherein, the temperature combination contains at least multiple temperature data and a temperature threshold corresponding to each temperature data, and the temperature threshold corresponding to each temperature data contains one or more temperature levels; each temperature combination is set with a corresponding thermal management target. If a temperature combination exists in which all temperature data have reached their respective temperature thresholds, then based on the temperature level of the reached temperature thresholds, an appropriate thermal management method is selected, and thermal management actions are performed on the thermal management target.

2. The method according to claim 1, characterized in that, The motor thermal management module includes a main drive motor branch and an auxiliary drive motor branch; the main drive motor branch includes a main drive motor, and the auxiliary drive motor branch includes an auxiliary drive motor. The main drive motor branch and the auxiliary drive motor branch are set up independently; each of the main drive motor branch and the auxiliary drive motor branch is equipped with a corresponding second water pump and a water-cooled radiator, and the water-cooled radiators in the main drive motor branch and the auxiliary drive motor branch are set close to each other.

3. The method according to claim 1, characterized in that, The preset thermal management rules include at least a first temperature combination, the temperature data of the first temperature combination includes the battery temperature and the ambient temperature, the battery temperature and the ambient temperature correspond to a first temperature threshold and a second temperature threshold, respectively, and the thermal management target is the battery pack; The first temperature threshold is set with a first temperature level to a sixth temperature level from low to high, and the second temperature threshold is set with a first temperature level to a third temperature level from low to high. Based on the temperature level of the temperature threshold reached, a suitable thermal management method is selected, specifically including: When the battery temperature reaches the second temperature level, the appropriate thermal management method is: turn on the first water pump and make the low-temperature radiator branch where the low-temperature radiator is located open, so that the coolant passes through the low-temperature radiator branch to cool the battery pack. When the battery temperature reaches the fourth temperature level, the appropriate thermal management method is to turn on the first cooling fan of the low-temperature heat sink. When the battery temperature reaches the sixth temperature level, the appropriate thermal management method is to simultaneously connect the low-temperature radiator branch, the plate heat exchanger branch, and the air conditioning circuit so that the coolant passes through the low-temperature radiator branch and the plate heat exchanger branch to cool the battery pack. When the battery temperature is below the fifth temperature level and the ambient temperature is below the first temperature level, the appropriate thermal management method is to shut down the plate heat exchanger branch and the air conditioning circuit. When the battery temperature is below the third temperature level and the ambient temperature is below the second temperature level, the appropriate thermal management method is to turn off the first cooling fan of the low-temperature heat sink. When the battery temperature is below the first temperature level and the ambient temperature is below the third temperature level, the appropriate thermal management method is to turn off the first water pump.

4. The method according to claim 3, characterized in that, The air conditioning circuit includes at least a compressor, a condenser, an electronic expansion valve, and an evaporator; The temperature data of the first temperature combination also includes the first outlet water temperature, the first outlet water temperature corresponds to a third temperature threshold, and the third temperature threshold is set with multiple temperature levels from low to high. After simultaneously connecting the low-temperature radiator branch, the plate heat exchanger branch, and the air conditioning circuit, the method further includes: Based on the temperature level reached by the first outlet water temperature, a corresponding compressor speed is set for the compressor; wherein, the higher the temperature level reached by the first outlet water temperature, the higher the compressor speed.

5. The method according to claim 3, characterized in that, The battery temperature includes the average cell temperature and the maximum cell temperature. The average cell temperature and the maximum cell temperature are each set with their own corresponding first temperature threshold. The temperature levels in the first temperature threshold corresponding to the average cell temperature are all lower than the temperature levels of the same level in the first temperature threshold corresponding to the maximum cell temperature. The method further includes: When determining whether the battery temperature has reached the second, fourth, or sixth temperature level, if either the average temperature of the cell or the highest temperature of the cell reaches its corresponding temperature level, then the battery temperature is considered to have reached the corresponding temperature level. When determining whether the battery temperature is lower than the first temperature level, the third temperature level, or the fifth temperature level, if both the average temperature of the battery cell and the highest temperature of the battery cell are lower than the corresponding temperature level, then the battery temperature is considered to be lower than its own corresponding temperature level.

6. The method according to claim 3, characterized in that, The air conditioning circuit includes at least a compressor, a heater, an electronic expansion valve, and an evaporator; The first temperature threshold corresponding to the battery temperature also includes a seventh temperature level and an eighth temperature level, wherein the seventh temperature level is lower than the eighth temperature level, and the eighth temperature level is lower than the first temperature level; Based on the temperature level of the temperature threshold reached, a suitable thermal management method is selected, specifically including: The battery temperature is lower than the seventh temperature level. The appropriate thermal management method is as follows: turn on the first water pump and connect the plate heat exchanger branch and the air conditioning circuit so that the coolant passes through the plate heat exchanger branch and heats the battery pack through the heater. When the battery temperature reaches the eighth temperature level, the appropriate thermal management method is to shut down the first water pump, the plate heat exchanger branch, and the air conditioning circuit.

7. The method according to claim 1, characterized in that, The preset thermal management rules include at least a second temperature combination, which includes the ambient temperature and the cab temperature. The ambient temperature and the cab temperature correspond to a second temperature threshold and a fourth temperature threshold, respectively. The thermal management target is the cab. The second temperature threshold and the fourth temperature threshold are each set with a single temperature level. Based on the temperature level of the temperature threshold reached, a suitable thermal management method is selected, specifically including: When the cab temperature reaches the fourth temperature threshold and the ambient temperature reaches the second temperature threshold, the appropriate thermal management method is to activate the air conditioning circuit to cool the cab. If the air conditioning circuit is already connected and used to cool the battery pack, then the cooling priority of the cab is set lower than that of the battery pack.

8. The method according to claim 1, characterized in that, The preset thermal management rules include at least a third temperature combination. The temperature data of the third temperature combination includes the motor temperature and the second outlet water temperature. The motor temperature and the second outlet water temperature correspond to the fifth temperature threshold and the sixth temperature threshold, respectively. The thermal management target is the motor. The fifth temperature threshold is set with a first temperature level to a fourth temperature level from low to high. The sixth temperature threshold is set with a first temperature level to a second temperature level from low to high. Based on the temperature level of the temperature threshold reached, a suitable thermal management method is selected, specifically including: When the motor temperature reaches the second temperature level and the second outlet water temperature reaches the first temperature level, the appropriate thermal management method is: to turn on the second water pump and make the water-cooled radiator branch where the water-cooled radiator is located open, so that the coolant passes through the water-cooled radiator branch to cool the motor. When the motor temperature reaches the fourth temperature level and the second outlet water temperature reaches the second temperature level, the appropriate thermal management method is to turn on the second cooling fan of the water-cooled radiator. When the motor temperature is lower than the third temperature level and the second outlet water temperature is lower than the second temperature level, the appropriate thermal management method is to turn off the second cooling fan of the water-cooled radiator branch. When the motor temperature is lower than the first temperature level and the second outlet water temperature is lower than the first temperature level, the appropriate thermal management method is to shut down the second water pump.

9. A thermal management device for a pure electric engineering vehicle, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed, enables the at least one processor to perform, for example, the thermal management method for a pure electric engineering vehicle as described in any one of claims 1 to 8.

10. A non-volatile computer storage medium storing computer-executable instructions, characterized in that, The computer-executable instructions are configured as follows: the thermal management method for pure electric engineering vehicles as described in any one of claims 1 to 8.

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