Thermal management method, device and equipment for diesel heating of new energy commercial vehicle and storage medium

Abstract

The invention discloses a thermal management method, device and equipment for diesel heating of a new energy commercial vehicle and a storage medium, and relates to the technical field of thermal management, and the thermal management method comprises the steps that after a whole vehicle high-voltage system is activated, a thermal management object is obtained, and the thermal management object comprises a battery pack and a driving motor; when the heat management object meets the corresponding preset heating requirement, the firewood heater corresponding to the heat management object is started, the heat management object is heated, the battery pack corresponds to the first firewood heater, and the driving motor corresponds to the second firewood heater; when the heat management object is heated to meet the preset cooling requirement, a cooling mode corresponding to the heat management object is started, the temperature of the heat management object is reduced, and the problems that in the prior art, due to low heating efficiency in an alpine region, a battery cannot be maintained within an efficient working temperature range, the cruising ability of a vehicle is remarkably reduced, and the service life is prolonged are solved. Through the split type firewood heating design, heating or cooling is started and stopped according to the real-time temperature requirements of the battery and the motor, and it is ensured that the system is always in an efficient operation interval.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal management, in particular to a thermal management method, device and equipment for diesel heating of a new energy commercial vehicle and a storage medium. BACKGROUND

[0002] At present, a water-cooled positive temperature coefficient heater (Water-cooled Positive Temperature Coefficient Heater, PTC) is used to heat the battery of a new energy commercial vehicle in a high-cold region. However, to improve the heating efficiency of the water-cooled PTC, the heating power of the PTC needs to be increased, which will result in an increase in power consumption. Meanwhile, the battery is always in a low-temperature state in the high-cold region, and the PTC needs to work all the time. When charging, the PTC needs to be turned on first to heat the battery, and then the battery can be charged, which will also result in a slow charging efficiency of the battery.

[0003] Therefore, the water-cooled PTC heating method cannot maintain the battery in an efficient working temperature range due to the low heating efficiency in the high-cold region, which will significantly reduce the endurance of the vehicle. How to improve the endurance of the new energy commercial vehicle in the high-cold region is a problem to be solved at present.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not mean that the above content is prior art. SUMMARY

[0005] The main purpose of the present application is to provide a thermal management method, device and equipment for diesel heating of a new energy commercial vehicle and a storage medium, which aims to solve the technical problem of how to improve the endurance of the new energy commercial vehicle in the high-cold region.

[0006] To achieve the above purpose, the present application provides a thermal management method for diesel heating of a new energy commercial vehicle. The method is applied to a thermal management system for diesel heating of a new energy commercial vehicle. The thermal management system for diesel heating of a new energy commercial vehicle includes a battery diesel heating assembly, a cab diesel heating assembly, a multi-way valve, a plate heat exchanger, a drive motor, a compressor, a condenser, a radiator kettle, an electronic fan and a first electronic water pump. The battery diesel heating assembly includes a first diesel heater, a second electronic water pump and a battery pack. The condenser is connected with the battery diesel heating assembly through an electronic expansion valve. The cab diesel heating assembly includes a second diesel heater and a heater core. The cab diesel heating assembly is connected with the plate heat exchanger. The plate heat exchanger is connected with the multi-way valve. The multi-way valve is connected with the radiator kettle. The radiator kettle is connected with the first electronic water pump. The first electronic water pump is connected with the drive motor. The method includes the following steps:

[0007] After activating the whole vehicle high-pressure system, a thermal management object is obtained, wherein the thermal management object includes the battery pack and the drive motor;

[0008] When the thermal management object meets the corresponding preset heating requirement, the corresponding cabin heater of the thermal management object is started to heat the thermal management object, wherein the battery pack corresponds to the first cabin heater, and the drive motor corresponds to the second cabin heater;

[0009] When the thermal management object is heated to meet the preset cooling requirement, the corresponding cooling mode of the thermal management object is started to reduce the temperature of the thermal management object.

[0010] In an embodiment, the starting, when the thermal management object meets the corresponding preset heating requirement, the corresponding cabin heater of the thermal management object to heat the thermal management object, comprises:

[0011] When the thermal management object is the battery pack, it is determined whether the battery pack meets the corresponding preset heating requirement, and the corresponding preset heating requirement of the battery pack is that the battery pack temperature is less than or equal to a first temperature threshold;

[0012] When the battery pack meets the corresponding preset heating requirement of the battery pack, the second electronic water pump is closed, and the first cabin heater is started to heat the first cooling liquid;

[0013] The self-contained water pump of the first cabin heater is started to circulate the first cooling liquid, so as to realize the battery heating loop circulation.

[0014] In an embodiment, the starting, when the thermal management object meets the corresponding preset heating requirement, the corresponding cabin heater of the thermal management object to heat the thermal management object, further comprises:

[0015] When the thermal management object is the drive motor, it is determined whether the drive motor meets the corresponding preset heating requirement, and the corresponding preset heating requirement of the drive motor is that the controller temperature is less than or equal to a second temperature threshold, the motor temperature is less than or equal to a third temperature threshold, and the second cooling liquid temperature is less than or equal to a fourth temperature threshold;

[0016] When the drive motor meets the corresponding preset heating requirement, the second cabin heater is started to heat the third cooling liquid;

[0017] The self-contained water pump of the second cabin heater is started to deliver the third cooling liquid;

[0018] The multi-way valve is started to form an electric drive loop, so that the plate heat exchanger exchanges the heat of the three cooling liquids to the second cooling liquid of the electric drive loop;

[0019] The first electronic water pump is started to circulate the second coolant and heat the drive motor.

[0020] In one embodiment, after activating the diesel heater corresponding to the thermal management object to heat the thermal management object when the thermal management object meets the corresponding preset heating requirements, the method further includes:

[0021] When the thermal management target is the cab, turn off the ignition switch and turn on the second diesel heater to make the built-in water pump of the second diesel heater run, deliver warm water to the heater core, and increase the temperature of the cab.

[0022] In one embodiment, after activating the diesel heater corresponding to the thermal management object to heat the thermal management object when the thermal management object meets the corresponding preset heating requirements, the method further includes:

[0023] When the heat management object does not meet the corresponding preset heating requirements, the diesel heater corresponding to the heat management object is turned off.

[0024] In one embodiment, the step of activating the cooling mode corresponding to the thermally managed object and reducing the temperature of the thermally managed object when the object is heated to meet a preset cooling requirement includes:

[0025] When the thermal management object is a battery pack, it is determined whether the battery pack meets the corresponding preset cooling requirements. The preset cooling requirements for the battery pack are that the battery pack temperature is greater than or equal to the fifth temperature threshold.

[0026] When the battery pack meets the preset cooling requirements corresponding to the battery pack, the battery cooling mode is activated.

[0027] The compressor speed and electric fan speed are determined based on the battery cooling mode and the battery pack temperature.

[0028] The compressor is started based on the compressor speed to compress the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, which is then delivered to the condenser.

[0029] The electronic fan is started based on the speed of the electronic fan to blow air and dissipate heat from the condenser, turning the high-temperature and high-pressure gas into a high-pressure liquid;

[0030] The electronic expansion valve is opened to reduce the temperature of the first coolant based on the high-pressure liquid.

[0031] The second electronic water pump is activated to circulate the first coolant and reduce the battery temperature.

[0032] In one embodiment, the step of activating the cooling mode corresponding to the thermal management object and reducing the temperature of the thermal management object when the object is heated to meet the preset cooling requirements further includes:

[0033] When the thermal management object is the drive motor, it is determined whether the drive motor meets the corresponding preset cooling requirements. The preset cooling requirements for the drive motor are that the controller temperature is greater than or equal to the sixth temperature threshold or the motor temperature is greater than or equal to the seventh temperature threshold.

[0034] When the drive motor meets the preset cooling requirements corresponding to the drive motor, the electric drive cooling mode is activated;

[0035] The target speed is determined based on the electric drive cooling mode, the controller temperature, and the motor temperature;

[0036] The electric fan is started based on the target rotation speed so that the electric fan can lower the temperature of the second coolant stored in the radiator reservoir.

[0037] The first electronic water pump is started to deliver the second coolant, thereby reducing the temperature of the controller and the motor.

[0038] Furthermore, to achieve the above objectives, this application also proposes a thermal management device for diesel-powered heating in new energy commercial vehicles, the thermal management device comprising:

[0039] The acquisition module is used to acquire thermal management objects after activating the vehicle's high-voltage system, wherein the thermal management objects include the battery pack and the drive motor;

[0040] A heating module is used to turn on the diesel heater corresponding to the thermal management object when the thermal management object meets the corresponding preset heating requirements, so as to heat the thermal management object. The battery pack corresponds to the first diesel heater and the drive motor corresponds to the second diesel heater.

[0041] The cooling module is used to activate the cooling mode corresponding to the thermal management object and reduce the temperature of the thermal management object when the thermal management object is heated to meet the preset cooling requirements.

[0042] In addition, to achieve the above objectives, this application also proposes a thermal management device for diesel heating in new energy commercial vehicles. The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the thermal management method for diesel heating in new energy commercial vehicles as described above.

[0043] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the thermal management method for diesel heating of new energy commercial vehicles as described above.

[0044] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the thermal management method for diesel-powered heating in new energy commercial vehicles as described above.

[0045] One or more technical solutions proposed in this application have at least the following technical effects:

[0046] After activating the vehicle's high-voltage system, the thermal management objects, including the battery pack and drive motor, are identified. When the thermal management objects meet the corresponding preset heating requirements, the corresponding diesel heater is activated to heat them. The battery pack corresponds to the first diesel heater, and the drive motor corresponds to the second diesel heater. When the thermal management objects are heated to meet the preset cooling requirements, the corresponding cooling mode is activated to lower their temperature. This solves the problem that existing water-heated PTC heating methods in cold regions cannot maintain the battery within the high-efficiency operating temperature range due to low heating efficiency, resulting in a significant decrease in vehicle range. Compared with existing technologies, the separate diesel heater design allows for heating or cooling to be started and stopped separately according to the real-time temperature requirements of the battery and motor, ensuring that the system is always in the high-efficiency operating range. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A flowchart illustrating an embodiment of the thermal management method for diesel-powered heating in new energy commercial vehicles according to this application;

[0050] Figure 2 A schematic diagram of the thermal management system for diesel heating in a new energy commercial vehicle, provided in Embodiment 1 of the thermal management method for diesel heating in a new energy commercial vehicle according to this application;

[0051] Figure 3This is a schematic diagram of the module structure of the thermal management device for diesel-powered heating in a new energy commercial vehicle, as described in an embodiment of this application.

[0052] Figure 4 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the thermal management method for diesel heating in new energy commercial vehicles in this application embodiment.

[0053] Explanation of icon numbers:

[0054] First diesel heater 011, second electronic water pump 012, battery pack 013, second diesel heater 021, heater core 022, multi-way valve 03, plate heat exchanger 04, drive motor 05, compressor 06, condenser 07, radiator kettle 08, electronic fan 09, first electronic water pump 10, electronic expansion valve 11.

[0055] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0057] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0058] The main solution of this application embodiment is as follows: After activating the vehicle high-voltage system, a thermal management object is obtained, wherein the thermal management object includes the battery pack 013 and the drive motor 05; when the thermal management object meets the corresponding preset heating requirements, the diesel heater corresponding to the thermal management object is turned on to heat the thermal management object, wherein the battery pack 013 corresponds to the first diesel heater 10 and the drive motor 05 corresponds to the second diesel heater 021; when the thermal management object is heated to meet the preset cooling requirements, the cooling mode corresponding to the thermal management object is turned on to reduce the temperature of the thermal management object.

[0059] In this embodiment, for ease of description, the following description will focus on the thermal management system for identifying diesel heating in new energy commercial vehicles.

[0060] Because existing hydrothermal PTC heating technology has low heating efficiency in cold regions, it cannot maintain the battery within its efficient operating temperature range, resulting in a significant reduction in vehicle range.

[0061] This application provides a solution that, after activating the vehicle's high-voltage system, acquires a thermal management object, which includes a battery pack 013 and a drive motor 05. When the thermal management object meets the corresponding preset heating requirements, the corresponding diesel heater is activated to heat the thermal management object. Specifically, the battery pack 013 corresponds to the first diesel heater 10, and the drive motor 05 corresponds to the second diesel heater 021. When the thermal management object is heated to meet the preset cooling requirements, the corresponding cooling mode is activated to reduce the temperature of the thermal management object. This solves the problem that the existing water-heated PTC heating method cannot maintain the battery within the high-efficiency operating temperature range in cold regions due to low heating efficiency, resulting in a significant decrease in vehicle range. Compared with the existing technology, the split diesel heater design allows for the separate activation and deactivation of heating or cooling based on the real-time temperature requirements of the battery and motor, ensuring that the system is always in the high-efficiency operating range.

[0062] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a thermal management system for diesel-powered heating in new energy commercial vehicles. The following description uses a thermal management system for diesel-powered heating in new energy commercial vehicles as an example to illustrate this embodiment and the subsequent embodiments.

[0063] Based on this, embodiments of this application provide a thermal management method for diesel-powered heating systems in new energy commercial vehicles, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the thermal management method for diesel-powered heating in new energy commercial vehicles according to this application.

[0064] In this embodiment, the thermal management method for diesel-powered heating in new energy commercial vehicles includes steps S10-30:

[0065] Step S10: After activating the vehicle high-voltage system, obtain the thermal management object, wherein the thermal management object includes the battery pack 013 and the drive motor 05;

[0066] It should be noted that the high-voltage system of the whole vehicle is the core high-voltage electrical system of new energy commercial vehicles. It usually refers to the power supply network with a voltage of ≥60V, which is responsible for providing electrical energy to high-power components such as drive motor 05, battery pack 013, electronic control system, PTC / diesel heating, etc. The thermal management object is the key component that requires active temperature regulation. In this application, it includes at least battery pack 013 and drive motor 05. Battery pack 013 is an energy storage unit composed of multiple cells connected in series / parallel, which is the power source of new energy commercial vehicles. Drive motor 05 is the core component that converts electrical energy into mechanical energy and drives the vehicle.

[0067] Understandably, activating the thermal management function only after ensuring the vehicle's high-voltage system is ready can prevent damage to high-voltage components caused by misoperation under low-voltage conditions, and prevent circuit failures caused by the thermal management system forcibly operating when the high-voltage system is not activated, thereby improving the safety of the thermal management system.

[0068] Reference Figure 2 , Figure 2 This is a schematic diagram of the thermal management system for diesel-powered heating of a new energy commercial vehicle, which is the first embodiment of the thermal management method for diesel-powered heating of a new energy commercial vehicle according to this application.

[0069] like Figure 2 As shown, the thermal management system for diesel heating in new energy commercial vehicles includes a battery diesel heating component, a cab diesel heating component, a multi-way valve 03, a plate heat exchanger 04, a drive motor 05, a compressor 06, a condenser 07, a radiator water tank 08, an electric fan 09, and a first electronic water pump 10. The battery diesel heating component includes a first diesel heater 10, a second electronic water pump 012, and a battery pack 013. The condenser 07 is connected to the battery diesel heating component via the electronic expansion valve 11. The cab diesel heating component includes a second diesel heater 021 and a heater core 022. The cab diesel heating component is connected to the plate heat exchanger 04. The plate heat exchanger 04 is connected to the multi-way valve 03. The multi-way valve 03 is connected to the radiator water tank 08. The radiator water tank 08 is connected to the first electronic water pump 10. The first electronic water pump 10 is connected to the drive motor 05.

[0070] It should be noted that when heating battery pack 013, after activating the vehicle's high-voltage system, [the process is accomplished using...]. Figure 2 Temperature sensor T above battery pack 013 acquires the temperature of battery pack 013. When the temperature of battery pack 013 is below 20°C, the first diesel heater 10 is activated. The heat generated by the combustion of the first diesel heater 10 directly heats the coolant through a heat exchanger. At the same time, the second electronic water pump 012 is turned off. The red icon of the water pump located to the right of the first diesel heater 10 in the figure is the water pump built into the first diesel heater 10. The water pump built into the first diesel heater 10 pushes the heated coolant to circulate to battery pack 013, raising the temperature of battery pack 013. Among them, the expansion tank 2 in the figure is a pressure balancing component, and the coolant inside it is also heated during circulation.

[0071] When heating the drive motor 05, the second diesel heater 021 is activated to heat the coolant. The red water pump icon on the right side of the second diesel heater 021 in the diagram is the built-in water pump of the second diesel heater 021. The built-in water pump of the second diesel heater 021 pushes the heated coolant to circulate to the plate heat exchanger 04. The plate heat exchanger 04 can exchange the heat of the coolant heated by the second diesel heater 021 to the coolant in another route connected to the plate heat exchanger 04, namely the coolant in the electric drive circuit. At the same time, the 1 and 2 circuits of the multi-way valve 03 (three-way valve) are opened, and the first electronic water pump 10 is turned on. The coolant in the electric drive circuit flows from the plate heat exchanger 04 to the multi-way valve 03, radiator reservoir 08, temperature sensor, first electronic water pump 10, multi-function pump, and finally to the drive motor 05, raising the temperature of the drive motor 05. Here, the multi-function pump refers to a composite electromechanical assembly formed by the physical integration and functional fusion of multiple core electric drive and high-voltage management systems.

[0072] When cooling the battery, the required speed of compressor 06 and the required temperature of electric fan 09 are determined according to the battery temperature. Compressor 06 (air conditioning compressor) and electric fan 09 are started. Compressor 06 compresses the low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas and delivers it to condenser 07. Electric fan 09 blows air onto condenser 07 to dissipate heat, turning the high-temperature, high-pressure gas into high-pressure liquid. Electronic expansion valve 11 is opened, and the high-pressure liquid is used to cool the coolant in the battery pack 013 circuit connected to electronic expansion valve 11. The second electronic water pump 012 pushes the coolant in the battery pack 013 circuit to circulate to the battery pack 013, reducing the battery temperature.

[0073] When cooling the electric drive, the target speed of the electric fan 09 is determined based on the temperature of the motor and controller. The electric fan 09 is started according to the target speed to reduce the temperature of the coolant stored in the radiator reservoir 08. The second electric water pump 012 is started to deliver coolant to the drive motor 05 to reduce the temperature of the controller and the motor.

[0074] When heating the cab, turn off the ignition switch and turn on the second diesel heater 021. The built-in water pump of the second diesel heater 021 will operate to deliver warm water to the heater core 022. The electric fan on the right side of the heater core 022 will turn on to blow the heat from the heater core 022 into the cab, thereby increasing the temperature of the cab.

[0075] Step S20: When the thermal management object meets the corresponding preset heating requirements, turn on the diesel heater corresponding to the thermal management object to heat the thermal management object. The battery pack 013 corresponds to the first diesel heater 10, and the drive motor 05 corresponds to the second diesel heater 021.

[0076] It should be noted that the preset heating requirement can be a temperature threshold set for the thermally managed object. When the temperature of the thermally managed object is lower than the temperature threshold, the diesel heater is activated. The diesel heater is an independent heating device that uses diesel (or other fuels) as its energy source. It generates heat by burning fuel for heating vehicles or equipment. The first diesel heater 10 is used to heat the battery pack 013, and the second diesel heater 021 is used to heat the drive motor 05.

[0077] It is understandable that, since the battery pack 013 and the drive motor 05 have different thermal management requirements in low-temperature environments, step S20 is performed to independently control the diesel heater for each object. This avoids overheating that may occur when a single heater supplies heat to both the battery and the motor at the same time, due to the different temperature requirements of the two (e.g., the motor has reached the standard but the battery still needs to be heated), resulting in ineffective fuel consumption, thereby improving heating efficiency.

[0078] In one feasible implementation, step S20 may include: when the thermal management object is the battery pack 013, determining whether the battery pack 013 meets the corresponding preset heating requirements, wherein the preset heating requirements for the battery pack 013 are that the temperature of the battery pack 013 is less than or equal to a first temperature threshold; when the battery pack 013 meets the preset heating requirements for the battery pack 013, turning off the second electronic water pump 012, turning on the first diesel heater 10, and heating the first coolant; starting the built-in water pump of the first diesel heater 10 to circulate the first coolant and realize the battery heating circuit circulation.

[0079] It should be noted that the first temperature threshold can be any suitable temperature threshold, such as 20°C. The temperature of battery pack 013 is obtained through a temperature sensor, as shown in the reference. Figure 2 The first coolant refers to the coolant circulating in the circuit including the battery pack 013, expansion tank 2, electronic expansion valve 11, first diesel heater 10 and second electronic water pump 012.

[0080] For example, when the temperature of the battery pack 013 is ≤20℃ (first temperature threshold), the first diesel heater 10 is turned on and the second electronic water pump 012 is turned off. The first coolant heated by the first diesel heater 10 is circulated by the water pump built into the first diesel heater 10 to heat the battery pack 013.

[0081] In this embodiment, by independently controlling the start and stop of the first diesel heater 10 and the second electronic water pump 012, and by using the built-in water pump of the first diesel heater 10 to drive the coolant circulation, the problem of low heating efficiency and high energy consumption of the battery pack 013 in low-temperature environments is solved.

[0082] In another feasible implementation, step S20 may include: when the thermal management object is the drive motor 05, determining whether the drive motor 05 meets the corresponding preset heating requirements, wherein the preset heating requirements for the drive motor 05 are that the controller temperature is less than or equal to a second temperature threshold, the motor temperature is less than or equal to a third temperature threshold, and the second coolant temperature is less than or equal to a fourth temperature threshold; when the drive motor 05 meets the corresponding preset heating requirements, turning on the second diesel heater 021 to heat the third coolant; starting the built-in water pump of the second diesel heater 021 to deliver the third coolant; opening the multi-way valve 03 to form an electric drive circuit, so that the plate heat exchanger 04 exchanges the heat of the three coolants to the second coolant in the electric drive circuit; and starting the first electronic water pump 10 to drive the second coolant to circulate and heat the drive motor 05.

[0083] It should be noted that the controller is the core electronic control unit in an electric vehicle or industrial automation system. It is responsible for receiving sensor signals, processing data, and outputting commands to precisely manage the operation of components such as the motor, battery, and thermal management system. The motor is a device that converts electrical energy into mechanical energy. The second, third, and fourth temperature thresholds can be any suitable temperature thresholds, as referenced. Figure 2 The second coolant refers to the coolant circulating in the circuit including the second diesel heater 021 and the plate heat exchanger 04, and the third coolant refers to the coolant circulating in the circuit including the plate heat exchanger 04, the multi-way valve 03, the radiator kettle 08, the first electronic water pump 10 and the drive motor 05.

[0084] For example, when the controller temperature is ≤20℃ (second temperature threshold), the motor temperature is ≤25℃ (third temperature threshold), and the coolant temperature is ≤30℃ (fourth temperature threshold), and all of the above conditions are met, the second diesel heater 021 is turned on to heat the second coolant. The second diesel heater 021's built-in water pump drives the second coolant to circulate to the plate heat exchanger 04. Then, the plate heat exchanger 04 exchanges the warm water heat of the second coolant in the diesel heater circuit to the third coolant. The first electronic water pump 10 is turned on to drive the circulation of the third coolant, thereby achieving the purpose of heating the drive motor 05 and keeping the electric drive system in the high-efficiency temperature range. The electric drive system includes at least a motor and a controller.

[0085] In this embodiment, the problem of low preheating efficiency, high energy consumption and slow response of the drive motor 05 and controller in low-temperature environments is solved by linking the diesel heater and plate heat exchanger 04 for heating and designing an independent coolant circuit.

[0086] In another feasible implementation, step S20 may include: when the thermal management object is the cab, turning off the ignition switch and turning on the second diesel heater 021, so that the built-in water pump of the second diesel heater 021 operates and delivers warm water to the heater core 022 to increase the temperature of the cab.

[0087] It should be noted that the ignition switch is the master switch for the vehicle's power system, responsible for connecting or disconnecting the vehicle's low-voltage power supply and high-voltage system. The heater core 022 is the core heating component of the cab's air conditioning system, containing dense metal pipes and heat dissipation fins. When the high-temperature coolant flows through the heater core 022, the heat is forced into the cab's air ducts by the right-side electric fan, thus achieving the heating function.

[0088] For example, when the ignition switch is turned off and the second diesel heater 021 is turned on, the built-in water pump of the second diesel heater 021 operates to deliver warm water to the heater core 022. The electric fan on the right side of the heater core 022 is turned on to blow the heat of the heater core 022 towards the cab and increase the temperature of the cab.

[0089] In this embodiment, the problem of traditional fuel vehicles or electric vehicles being unable to efficiently provide heating air to the cab when the engine is off is solved by using diesel heating to heat the cab.

[0090] In another feasible implementation, step S20 may include: when the thermal management object does not meet the corresponding preset heating requirements, turning off the diesel heater corresponding to the thermal management object.

[0091] For example, when the thermal management target is battery pack 013, the first diesel heater 10 is turned off when the battery temperature is ≥20℃; when the conditions of controller temperature ≤20℃, motor temperature ≤25℃, and coolant temperature ≤30℃ cannot be met simultaneously, the second diesel heater 021 is turned off. In this embodiment, the energy waste caused by the traditional thermal management system continuing to heat after the temperature has reached the target is solved by intelligent temperature threshold judgment and diesel heater closed-loop control.

[0092] Step S30: When the thermal management object is heated to meet the preset cooling requirements, the cooling mode corresponding to the thermal management object is turned on to reduce the temperature of the thermal management object.

[0093] It should be noted that the cooling modes include battery cooling mode and electric drive cooling mode. Battery cooling mode is used to cool the battery, while electric drive cooling mode is used to cool the electric drive system.

[0094] Understandably, since the electrolyte decomposes faster under high-temperature conditions, step S30 can avoid the risk of battery thermal runaway, thereby improving battery cycle life and fast charging safety.

[0095] In one feasible implementation, step S30 may include: when the thermal management object is battery pack 013, determining whether battery pack 013 meets the corresponding preset cooling requirements, wherein the preset cooling requirements for battery pack 013 are that the temperature of battery pack 013 is greater than or equal to a fifth temperature threshold; if battery pack 013 meets the preset cooling requirements, activating the battery cooling mode; determining the speed of compressor 06 and the speed of electric fan 09 based on the battery cooling mode and the temperature of battery pack 013; starting compressor 06 based on the speed of compressor 06 to compress low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas, and delivering it to condenser 07; starting electric fan 09 based on the speed of electric fan 09 to blow air and dissipate heat from condenser 07, turning the high-temperature, high-pressure gas into high-pressure liquid; opening electronic expansion valve 11 to lower the temperature of the first coolant based on the high-pressure liquid; and starting the second electronic water pump 012 to circulate the first coolant and lower the battery temperature.

[0096] It should be noted that the fifth temperature threshold can be any suitable temperature threshold. Low-temperature and low-pressure refrigerant gas refers to the refrigerant state after completing the evaporation and heat absorption process and before entering the compressor's 06 suction port.

[0097] For example, when the temperature of the battery pack 013 is greater than 32°C, the battery cooling mode is activated. The required power of the compressor 06 and the electric fan 09 is determined by the temperature of the battery pack 013, thereby determining the speed of the compressor 06 and the electric fan 09. The compressor 06 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas and delivers it to the condenser 07. Then, the electric fan 09 turns the high-temperature, high-pressure gas in the condenser 07 into a high-pressure liquid. The electronic expansion valve 11 is opened to precisely adjust the flow rate of the high-pressure liquid. Based on the high-pressure liquid, the temperature of the first coolant is reduced. The second electronic water pump 012 is activated to deliver the first coolant to the battery pack 013, thereby reducing the temperature of the battery pack 013.

[0098] In this embodiment, since the electrolyte decomposes more rapidly under high-temperature conditions, this step can avoid the risk of battery thermal runaway, thereby improving battery cycle life and fast charging safety.

[0099] In another feasible implementation, step S30 may include: when the thermal management object is the drive motor 05, determining whether the drive motor 05 meets the corresponding preset cooling requirements, wherein the preset cooling requirements for the drive motor 05 are a controller temperature greater than or equal to a sixth temperature threshold or a motor temperature greater than or equal to a seventh temperature threshold; when the drive motor 05 meets the preset cooling requirements for the drive motor 05, activating the electric drive cooling mode; determining a target speed based on the electric drive cooling mode, the controller temperature, and the motor temperature; activating the electronic fan 09 based on the target speed to reduce the temperature of the second coolant stored in the radiator reservoir 08; and activating the first electronic water pump 10 to deliver the second coolant to reduce the controller temperature and the motor temperature.

[0100] It should be noted that the sixth and seventh temperature thresholds can be any suitable temperature thresholds, and the target speed refers to the speed of the electric fan 09.

[0101] For example, the motor and controller temperatures are received via CAN (Controller Area Network). When the controller temperature is ≥45℃ or the motor temperature is ≥70℃, the power required by the electronic fan 09 is confirmed by the controller temperature and the motor temperature, thereby determining the target speed of the electronic fan 09. The electronic fan 09 is then started to reduce the temperature of the coolant stored in the radiator reservoir 08. The first electronic water pump 10 is then started to deliver the second coolant to the controller and motor (all-in-one) to reduce the temperature.

[0102] In this embodiment, by determining whether the controller temperature and motor temperature meet the cooling requirements, the electric drive system is cooled to avoid a decrease in the efficiency of the electric drive system due to excessively high temperature, thereby improving the overall vehicle power and component reliability.

[0103] This embodiment provides a thermal management method for diesel-powered heating in new energy commercial vehicles. After activating the vehicle's high-voltage system, a thermal management object is acquired, including a battery pack 013 and a drive motor 05. When the thermal management object meets the corresponding preset heating requirements, the diesel heater corresponding to the thermal management object is activated to heat the object. Specifically, the battery pack 013 corresponds to the first diesel heater 10, and the drive motor 05 corresponds to the second diesel heater 021. When the thermal management object is heated to meet the preset cooling requirements, the cooling mode corresponding to the thermal management object is activated to reduce its temperature. This method solves the problem that existing water-heated PTC heating methods in cold regions cannot maintain the battery within the high-efficiency operating temperature range due to low heating efficiency, resulting in a significant decrease in vehicle range. Compared with existing technologies, this method uses a split diesel heater design to start or stop heating or cooling according to the real-time temperature requirements of the battery and motor, ensuring that the system is always in the high-efficiency operating range.

[0104] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the thermal management method of diesel heating for new energy commercial vehicles in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0105] This application also provides a thermal management device for diesel-powered heating systems in new energy commercial vehicles. Please refer to [link / reference]. Figure 3 The thermal management device for diesel-powered heating in new energy commercial vehicles includes:

[0106] The acquisition module 10 is used to acquire the thermal management object after activating the vehicle's high-voltage system, wherein the thermal management object includes the battery pack and the drive motor;

[0107] Heating module 20 is used to turn on the diesel heater corresponding to the thermal management object when the thermal management object meets the corresponding preset heating requirements, so as to heat the thermal management object. The battery pack corresponds to the first diesel heater and the drive motor corresponds to the second diesel heater.

[0108] The cooling module 30 is used to activate the cooling mode corresponding to the thermal management object and reduce the temperature of the thermal management object when the thermal management object is heated to meet the preset cooling requirements.

[0109] The thermal management device for diesel-powered heating in new energy commercial vehicles provided in this application adopts the thermal management method for diesel-powered heating in new energy commercial vehicles described in the above embodiments, and can solve the technical problems of thermal management for diesel-powered heating in new energy commercial vehicles. Compared with the prior art, the beneficial effects of the thermal management device for diesel-powered heating in new energy commercial vehicles provided in this application are the same as the beneficial effects of the thermal management method for diesel-powered heating in new energy commercial vehicles provided in the above embodiments, and other technical features in the thermal management device for diesel-powered heating in new energy commercial vehicles are the same as the features disclosed in the methods of the above embodiments, and will not be repeated here.

[0110] The heating module 20 is further configured to determine whether the battery pack meets the corresponding preset heating requirements when the thermal management object is the battery pack, wherein the preset heating requirement for the battery pack is that the battery pack temperature is less than or equal to a first temperature threshold; when the battery pack meets the preset heating requirement for the battery pack, the second electronic water pump is turned off and the first diesel heater is turned on to heat the first coolant; the built-in water pump of the first diesel heater is started to circulate the first coolant and realize the battery heating circuit circulation.

[0111] The heating module 20 is further configured to, when the heat management object is the drive motor, determine whether the drive motor meets the corresponding preset heating requirements. The preset heating requirements for the drive motor are that the controller temperature is less than or equal to a second temperature threshold, the motor temperature is less than or equal to a third temperature threshold, and the second coolant temperature is less than or equal to a fourth temperature threshold. When the drive motor meets the corresponding preset heating requirements, the second diesel heater is turned on to heat the third coolant; the built-in water pump of the second diesel heater is started to deliver the third coolant; the multi-way valve is opened to form an electric drive circuit, so that the plate heat exchanger exchanges the heat of the three coolants to the second coolant in the electric drive circuit; and the first electronic water pump is started to circulate the second coolant to heat the drive motor.

[0112] The heating module 20 is also used to turn off the ignition switch and turn on the second diesel heater when the heat management object is the cab, so that the built-in water pump of the second diesel heater can operate and deliver warm water to the heater core to increase the temperature of the cab.

[0113] The heating module 20 is also used to turn off the diesel heater corresponding to the heat management object when the heat management object does not meet the corresponding preset heating requirements.

[0114] The cooling module 30 is further configured to, when the thermal management object is a battery pack, determine whether the battery pack meets the corresponding preset cooling requirements, wherein the preset cooling requirements for the battery pack are that the battery pack temperature is greater than or equal to a fifth temperature threshold; if the battery pack meets the preset cooling requirements, activate the battery cooling mode; determine the compressor speed and the electric fan speed based on the battery cooling mode and the battery pack temperature; start the compressor based on the compressor speed to compress the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas and deliver it to the condenser; start the electric fan based on the electric fan speed to blow air and dissipate heat from the condenser, turning the high-temperature, high-pressure gas into a high-pressure liquid; open the electronic expansion valve to lower the temperature of the first coolant based on the high-pressure liquid; and start the second electronic water pump to circulate the first coolant and lower the battery temperature.

[0115] The cooling module 30 is further configured to, when the thermal management object is the drive motor, determine whether the drive motor meets the corresponding preset cooling requirements, wherein the preset cooling requirements for the drive motor are a controller temperature greater than or equal to a sixth temperature threshold or a motor temperature greater than or equal to a seventh temperature threshold; when the drive motor meets the preset cooling requirements for the drive motor, activate the electric drive cooling mode; determine a target speed based on the electric drive cooling mode, the controller temperature, and the motor temperature; start the electric fan based on the target speed to reduce the temperature of the second coolant stored in the radiator reservoir; and start the first electric water pump to deliver the second coolant to reduce the controller temperature and the motor temperature.

[0116] This application provides a thermal management device for diesel heating in new energy commercial vehicles. The thermal management device for diesel heating in new energy commercial vehicles includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the thermal management method for diesel heating in new energy commercial vehicles described in Embodiment 1 above.

[0117] The following is for reference. Figure 4 This document illustrates a structural schematic diagram of a thermal management device suitable for implementing diesel-powered heating systems in new energy commercial vehicles, as described in the embodiments of this application. The thermal management device for diesel-powered heating systems in new energy commercial vehicles in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 4 The thermal management device for diesel heating in new energy commercial vehicles shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0118] like Figure 4As shown, the thermal management device for diesel-powered heating in new energy commercial vehicles may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to programs stored in ROM (Read Only Memory) 1002 or programs loaded from storage device 1003 into random access memory (RRAM) 1004. RAM 1004 also stores various programs and data required for the operation of the thermal management device for diesel-powered heating in new energy commercial vehicles. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the thermal management equipment for diesel-powered heating in new energy commercial vehicles to exchange data wirelessly or via wired communication with other devices. Although the figure shows thermal management equipment for diesel-powered heating in new energy commercial vehicles with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented alternatively.

[0119] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a 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, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0120] The thermal management device for diesel-powered heating in new energy commercial vehicles provided in this application adopts the thermal management method for diesel-powered heating in new energy commercial vehicles described in the above embodiments, and can solve the technical problems of thermal management for diesel-powered heating in new energy commercial vehicles. Compared with the prior art, the beneficial effects of the thermal management device for diesel-powered heating in new energy commercial vehicles provided in this application are the same as the beneficial effects of the thermal management method for diesel-powered heating in new energy commercial vehicles provided in the above embodiments, and other technical features in the thermal management device for diesel-powered heating in new energy commercial vehicles are the same as the features disclosed in the method of the previous embodiment, and will not be repeated here.

[0121] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0122] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0123] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the thermal management method for diesel heating of new energy commercial vehicles in the above embodiments.

[0124] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0125] The aforementioned computer-readable storage medium may be included in the thermal management equipment for diesel heating in new energy commercial vehicles; or it may exist independently and not be installed in the thermal management equipment for diesel heating in new energy commercial vehicles.

[0126] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by the thermal management device for diesel-powered heating in new energy commercial vehicles, the thermal management device causes the following: after activating the vehicle's high-voltage system, it acquires a thermal management object, wherein the thermal management object includes the battery pack and the drive motor; when the thermal management object meets the corresponding preset heating requirements, it activates the diesel heater corresponding to the thermal management object to heat the thermal management object, wherein the battery pack corresponds to the first diesel heater and the drive motor corresponds to the second diesel heater; when the thermal management object is heated to meet the preset cooling requirements, it activates the cooling mode corresponding to the thermal management object to reduce the temperature of the thermal management object.

[0127] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0128] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0129] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0130] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described thermal management method for diesel-powered heating in new energy commercial vehicles, thereby solving the technical problem of thermal management for diesel-powered heating in new energy commercial vehicles. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the thermal management method for diesel-powered heating in new energy commercial vehicles provided in the above embodiments, and will not be repeated here.

[0131] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described thermal management method for diesel-powered heating in new energy commercial vehicles.

[0132] The computer program product provided in this application can solve the technical problem of thermal management for diesel-powered heating systems in new energy commercial vehicles. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the thermal management method for diesel-powered heating systems in new energy commercial vehicles provided in the above embodiments, and will not be repeated here.

[0133] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A thermal management method for diesel-powered heating in new energy commercial vehicles, characterized in that, The method is applied to the thermal management system of diesel heating in new energy commercial vehicles. The thermal management system includes a battery diesel heating component, a cab diesel heating component, a multi-way valve, a plate heat exchanger, a drive motor, a compressor, a condenser, a radiator reservoir, an electric fan, and a first electric water pump. The battery diesel heating component includes a first diesel heater, a second electric water pump, and a battery pack. The condenser is connected to the battery diesel heating component via the electronic expansion valve. The cab diesel heating component includes a second diesel heater and a heater core. The cab diesel heating component is connected to the plate heat exchanger. The plate heat exchanger is connected to the multi-way valve. The multi-way valve is connected to the radiator reservoir. The radiator reservoir is connected to the first electric water pump. The first electric water pump is connected to the drive motor. The method includes: After activating the vehicle's high-voltage system, the thermal management object is obtained, wherein the thermal management object includes the battery pack and the drive motor; When the thermal management object meets the corresponding preset heating requirements, the diesel heater corresponding to the thermal management object is turned on to heat the thermal management object, wherein the battery pack corresponds to the first diesel heater and the drive motor corresponds to the second diesel heater; When the thermally managed object is heated to meet the preset cooling requirements, the corresponding cooling mode of the thermally managed object is activated to reduce the temperature of the thermally managed object.

2. The method as described in claim 1, characterized in that, When the heat management object meets the corresponding preset heating requirements, turning on the diesel heater corresponding to the heat management object to heat the heat management object includes: When the thermal management object is the battery pack, it is determined whether the battery pack meets the corresponding preset heating requirements. The preset heating requirements for the battery pack are that the battery pack temperature is less than or equal to a first temperature threshold. When the battery pack meets the preset heating requirements corresponding to the battery pack, the second electronic water pump is turned off and the first diesel heater is turned on to heat the first coolant; Start the built-in water pump of the first diesel heater to circulate the first coolant and realize the circulation of the battery heating circuit.

3. The method as described in claim 1, characterized in that, The step of turning on the diesel heater corresponding to the heat management object when the heat management object meets the corresponding preset heating requirements to heat the heat management object further includes: When the thermal management object is the drive motor, it is determined whether the drive motor meets the corresponding preset heating requirements. The preset heating requirements for the drive motor are that the controller temperature is less than or equal to the second temperature threshold, the motor temperature is less than or equal to the third temperature threshold, and the second coolant temperature is less than or equal to the fourth temperature threshold. When the drive motor meets the corresponding preset heating requirements, the second diesel heater is turned on to heat the third coolant; Start the water pump that comes with the second diesel heater to deliver the third coolant; The multi-way valve is opened to form an electric drive circuit, so that the plate heat exchanger exchanges the heat of the three coolants to the second coolant in the electric drive circuit; The first electronic water pump is started to circulate the second coolant and heat the drive motor.

4. The method as described in claim 1, characterized in that, After the step of turning on the diesel heater corresponding to the heat management object and heating the heat management object when the heat management object meets the corresponding preset heating requirements, the method further includes: When the thermal management target is the cab, turn off the ignition switch and turn on the second diesel heater to make the built-in water pump of the second diesel heater run, deliver warm water to the heater core, and increase the temperature of the cab.

5. The method as described in claim 1, characterized in that, After the step of turning on the diesel heater corresponding to the heat management object and heating the heat management object when the heat management object meets the corresponding preset heating requirements, the method further includes: When the heat management object does not meet the corresponding preset heating requirements, the diesel heater corresponding to the heat management object is turned off.

6. The method as described in claim 1, characterized in that, When the thermally managed object is heated to meet the preset cooling requirements, the cooling mode corresponding to the thermally managed object is activated to reduce the temperature of the thermally managed object, including: When the thermal management object is a battery pack, it is determined whether the battery pack meets the corresponding preset cooling requirements. The preset cooling requirements for the battery pack are that the battery pack temperature is greater than or equal to the fifth temperature threshold. When the battery pack meets the preset cooling requirements corresponding to the battery pack, the battery cooling mode is activated. The compressor speed and electric fan speed are determined based on the battery cooling mode and the battery pack temperature. The compressor is started based on the compressor speed to compress the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, which is then delivered to the condenser. The electronic fan is started based on the speed of the electronic fan to blow air and dissipate heat from the condenser, turning the high-temperature and high-pressure gas into a high-pressure liquid; The electronic expansion valve is opened to reduce the temperature of the first coolant based on the high-pressure liquid. The second electronic water pump is activated to circulate the first coolant and reduce the battery temperature.

7. The method as described in claim 1, characterized in that, The step of activating the cooling mode corresponding to the thermal management object and reducing the temperature of the thermal management object when the object is heated to meet the preset cooling requirements further includes: When the thermal management object is the drive motor, it is determined whether the drive motor meets the corresponding preset cooling requirements. The preset cooling requirements for the drive motor are that the controller temperature is greater than or equal to the sixth temperature threshold or the motor temperature is greater than or equal to the seventh temperature threshold. When the drive motor meets the preset cooling requirements corresponding to the drive motor, the electric drive cooling mode is activated; The target speed is determined based on the electric drive cooling mode, the controller temperature, and the motor temperature; The electric fan is started based on the target rotation speed so that the electric fan can lower the temperature of the second coolant stored in the radiator reservoir. The first electronic water pump is started to deliver the second coolant, thereby reducing the temperature of the controller and the motor.

8. A thermal management system device for diesel-powered heating in new energy commercial vehicles, characterized in that, The device includes: The acquisition module is used to acquire thermal management objects after activating the vehicle's high-voltage system, wherein the thermal management objects include the battery pack and the drive motor; A heating module is used to turn on the diesel heater corresponding to the thermal management object when the thermal management object meets the corresponding preset heating requirements, so as to heat the thermal management object. The battery pack corresponds to the first diesel heater and the drive motor corresponds to the second diesel heater. The cooling module is used to activate the cooling mode corresponding to the thermal management object and reduce the temperature of the thermal management object when the thermal management object is heated to meet the preset cooling requirements.

9. A thermal management system for diesel-powered heating in new energy commercial vehicles, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the thermal management system method for diesel-powered heating of new energy commercial vehicles as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the thermal management system method for diesel heating of new energy commercial vehicles as described in any one of claims 1 to 7.

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