A tractor thermal management control method, system, device, medium and tractor

Abstract

The present invention relates to a tractor thermal management control method, system, device, medium and tractor. The method includes: obtaining the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the refrigeration requirement of the passenger compartment; controlling the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, the cooling requirement and the refrigeration requirement to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment. By the method of the present invention, the refrigerant circuit and the low-temperature coolant circuit can be controlled based on the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the refrigeration requirement of the passenger compartment to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment, and further, during the operation conditions in spring and autumn, the operation can be ensured and the overall fuel economy of the whole machine can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery. Specifically, the present invention relates to a tractor thermal management control method, system, device, medium and tractor. Background Art

[0002] Traditional hybrid tractors use a compressor alone to cool the battery. And if a separate electric compressor is used, an additional high-voltage box is required to supply power to the compressor, increasing costs and energy consumption and reducing economy. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tractor thermal management control method, system, device, medium and tractor, aiming to solve at least one of the above technical problems.

[0004] In a first aspect, the technical solution of the present invention to solve the above technical problem is as follows: A tractor thermal management control method, the method includes:

[0005] Obtain the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery, and the refrigeration requirement of the passenger compartment;

[0006] According to the current operating environment temperature, cooling requirement and refrigeration requirement, control the refrigerant circuit and the low-temperature coolant circuit to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment;

[0007] Wherein, the low-temperature coolant circuit includes a first circuit formed by a radiator pack, a four-way valve, a battery water pump and a power battery pack, and the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, an HAVC air-conditioning system, a cooling device and a second electromagnetic expansion valve, and a third circuit formed by a radiator pack, a belt compressor, a cooling device and a second electromagnetic expansion valve.

[0008] The beneficial effect of the present invention is: This solution can control the refrigerant circuit and the low-temperature coolant circuit based on the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the refrigeration requirement of the passenger compartment to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment, and thus can ensure operation and improve the fuel economy of the whole machine under the operating conditions in spring and autumn.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Further, the above-mentioned controlling the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, cooling requirement and refrigeration requirement includes:

[0011] When the current operating environment temperature is within the first temperature range, the cooling requirement is present, and the refrigeration requirement is absent, control the first and second ports of the four-way valve to be connected, control the battery water pump to operate, and control the heat of the battery to be dissipated through the battery water in the heat dissipation package.

[0012] When the current operating environment temperature is within the first temperature range, the cooling requirement is present, and the refrigeration requirement is present, control the first and second ports of the four-way valve to be connected, control the battery water pump to operate, control the heat of the battery to be dissipated through the battery water in the heat dissipation package, control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close.

[0013] When the current operating environment temperature is within the second temperature range, the cooling requirement is present, and the refrigeration requirement is absent, control the second and fourth ports of the four-way valve to be connected, control the first electromagnetic expansion valve to close, control the second electromagnetic expansion valve to open, and control the clutch of the belt compressor to engage.

[0014] Further, when the current operating environment temperature is within the first temperature range, the cooling requirement is present, the refrigeration requirement is absent, and the battery temperature of the battery is greater than the first high-temperature alarm threshold, the method further includes:

[0015] Control the clutch of the belt compressor to engage, the first electromagnetic expansion valve to close, control the second electromagnetic expansion valve to open, and control the second and fourth ports of the four-way valve to be connected to cool the battery.

[0016] Further, when the current operating environment temperature is within the first temperature range, the cooling requirement is present, the refrigeration requirement is present, and the battery temperature of the battery is greater than the first high-temperature alarm threshold, the method further includes:

[0017] Control the second electromagnetic expansion valve to open and control the second and fourth ports of the four-way valve to be connected.

[0018] Further, the method further includes:

[0019] When the refrigeration requirement is for separate refrigeration, control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close.

[0020] Further, the low-temperature coolant loop further includes a fourth loop formed by the four-way valve, the cooling device, the power battery pack, and the battery water pump, and the method further includes:

[0021] When the storage time of the whole machine is greater than the set duration, the battery temperature of the battery is lower than the set threshold and charging is required, and when the engine of the tractor is not started or cannot be started due to insufficient power, control the battery to be connected to the charging pile and heat it using a heating film.

[0022] In a second aspect, the present invention also provides a tractor thermal management control system to solve the above technical problems. The system includes:

[0023] An acquisition module for acquiring the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery, and the refrigeration requirement of the passenger compartment;

[0024] A cooling module for controlling the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, the cooling requirement, and the refrigeration requirement to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment;

[0025] Among them, the low-temperature coolant circuit includes a first circuit formed by a radiator pack, a four-way valve, a battery water pump, and a power battery pack. The refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, an HAVC air conditioning system, a cooling device, and a second electromagnetic expansion valve, and a third circuit formed by a radiator pack, a belt compressor, a cooling device, and a second electromagnetic expansion valve.

[0026] In a third aspect, the present invention also provides an electronic device to solve the above technical problems. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements a tractor thermal management control method of the present application.

[0027] In a fourth aspect, the present invention also provides a computer-readable storage medium to solve the above technical problems. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements a tractor thermal management control method of the present application.

[0028] In a fifth aspect, the present invention also provides a tractor to solve the above technical problems. The tractor includes the electronic device described in the third aspect.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, and these will become apparent from the following description or be understood through the practice of the present application. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below.

[0031] Figure 1Flow chart of a tractor thermal management control method provided by an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of each loop in a tractor thermal management control system provided by an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the structure of a tractor thermal management control system provided by an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0035] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0036] The technical solutions of the present invention and how the technical solutions of the present invention solve the above technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other. For the same or similar concepts or processes, they may not be repeated in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0037] The solution provided by the embodiment of the present invention can be applied to any application scenario that requires overall thermal management of a hybrid tractor. The solution provided by the embodiment of the present invention can be executed by an electronic device with data processing capabilities, such as an electronic device with data processing capabilities installed on a tractor, such as a vehicle control unit VCU.

[0038] The embodiment of the present invention provides a possible implementation manner. As Figure 1 shown, a flow chart of a tractor thermal management control method is provided. This solution can be executed by any electronic device, for example, a vehicle control unit VCU. For convenience of description, the method provided by the embodiment of the present invention will be described below taking the vehicle control unit VCU as the execution subject. As Figure 1 shown in the flow chart, the method may include the following steps:

[0039] S1. Obtain the current operating environment temperature of the tractor, the cooling requirement of the battery, and the refrigeration requirement of the passenger compartment;

[0040] S2. Control the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, the cooling requirement, and the refrigeration requirement to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment;

[0041] Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation package, a four-way valve, a battery water pump, and a power battery pack. The refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, an HAVC air-conditioning system, a cooling device, and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation package, a belt compressor, a cooling device, and a second electromagnetic expansion valve.

[0042] Through the method of the present invention, the refrigerant circuit and the low-temperature coolant circuit can be controlled based on the current operating environment temperature of the tractor, the cooling demand of the battery, and the refrigeration demand of the passenger compartment to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment, and further, the operation can be ensured and the fuel economy of the whole machine can be improved under the operating conditions in spring and autumn.

[0043] The following further illustrates the solution of the present invention in combination with the following specific embodiments. In this embodiment, refer to Figure 2 each of the shown circuits to illustrate a tractor thermal management control method.

[0044] As Figure 2 shown, each circuit includes a motor cooling circuit (the sixth circuit), a hydraulic circuit (a condensation circuit (including the second and third circuits)), an engine cooling circuit (the left circuit in the high-temperature coolant circuit), an air-conditioning circuit (the fifth circuit), and a battery circuit (the fourth circuit). Among them, the hydraulic circuit is the same as that of a conventional tractor and will not be elaborated here.

[0045] Based on the above-mentioned respective circuits, a tractor thermal management control method proposed by this solution is introduced. The method may include the following steps:

[0046] S1, obtaining the current operating environment temperature of the tractor, the cooling demand of the battery, and the refrigeration demand of the passenger compartment;

[0047] Among them, the current operating environment temperature refers to the temperature of the environment where the tractor is currently located and can be measured based on a temperature sensor. The cooling demand refers to the demand for whether the battery needs to be cooled, and the refrigeration demand refers to the demand for whether the passenger compartment needs refrigeration. Among them, the tractor can be a hybrid tractor.

[0048] S2, controlling the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, the cooling demand, and the refrigeration demand to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment;

[0049] Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation package, a four-way valve, a battery water pump, and a power battery pack. The refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, an HAVC air-conditioning system, a cooling device, and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation package, a belt compressor, a cooling device, and a second electromagnetic expansion valve.

[0050] Among them, the various circuits described in this solution can affect each other. Based on the connection or disconnection of the various interfaces in the four-way valve, the corresponding circuit can be conducted or disconnected to meet the cooling demand and refrigeration demand.

[0051] Specifically, the above S2 is divided into three cases:

[0052] The first case: when the current operating environment temperature is in the first temperature range, the cooling demand is a cooling demand, and the refrigeration demand is no refrigeration demand, control the first interface and the second interface of the four-way valve to be connected, control the battery water pump to work, and control the heat of the battery to be dissipated through the battery water in the heat dissipation package to achieve cooling of the battery.

[0053] Among them, Figure 2 the corresponding 1, 2, 3, and 4 on the four-way valve respectively correspond to the first interface, the second interface, the third interface, and the fourth interface of the four-way valve. The first electromagnetic expansion valve is Figure 2 the electromagnetic expansion valve 1 shown in Figure 2 and the second electromagnetic expansion valve is

[0054] the electromagnetic expansion valve 2 shown in

[0055] Optionally, the above first temperature range can be set based on actual needs. For example, it can be 5 - 20°C.

[0056] The second case: when the current operating environment temperature is in the first temperature range, the cooling demand is a cooling demand, and the refrigeration demand is a refrigeration demand, control the first interface and the third interface of the four-way valve to be connected, control the battery water pump to work, control the heat of the battery to be dissipated through the battery water in the heat dissipation package, control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close.

[0057] Among them, when the first interface and the second interface of the four-way valve are connected, it indicates that the first circuit is conducting. At this time, the battery water pump can be controlled to operate, and the heat of the battery can be dissipated through the battery water in the heat dissipation package.

[0058] When the first electromagnetic expansion valve is opened and the second electromagnetic expansion valve is closed, it indicates that the second circuit is conducting. At this time, the refrigeration demand can be met.

[0059] The third case: When the current operating environment temperature is in the second temperature range, the cooling demand is for cooling, and the refrigeration demand is for no refrigeration, control the third interface and the fourth interface of the four-way valve to be connected, control the first electromagnetic expansion valve to be closed, control the second electromagnetic expansion valve to be opened, and control the clutch of the belt compressor to engage.

[0060] Optionally, the second temperature range can also be set based on actual needs. For example, it can be greater than 30 °C.

[0061] In the first case, if the battery temperature continues to rise and exceeds the first high-temperature alarm threshold, a forced cooling strategy will be adopted. Specifically:

[0062] Control the clutch of the belt compressor to engage, the first electromagnetic expansion valve to be closed, control the second electromagnetic expansion valve to be opened, and control the second interface and the fourth interface of the four-way valve to be connected to cool the battery.

[0063] Among them, when the second interface and the fourth interface of the four-way valve are connected, the second electromagnetic expansion valve is opened, and the clutch of the belt compressor is engaged, it indicates that the third circuit is conducting. At this time, the cooling demand can be achieved through the heat dissipation package. When the first electromagnetic expansion valve is closed, it indicates that refrigeration is not required.

[0064] Optionally, in the second case, if the battery temperature continues to rise and exceeds the first high-temperature alarm threshold, a forced cooling strategy will be adopted. Specifically:

[0065] Control the second electromagnetic expansion valve to be opened, control the second interface and the fourth interface of the four-way valve to be connected. At this time, the first electromagnetic expansion valve is also opened, and the clutch of the belt compressor is in the engaged state, so that the third circuit and the first circuit can be made to conduct simultaneously to meet the refrigeration demand and the cooling demand.

[0066] Optionally, the method further includes:

[0067] When the refrigeration demand is for separate refrigeration, control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to be opened, and control the second electromagnetic expansion valve to be closed.

[0068] Among them, when the clutch of the belt compressor engages, the first electromagnetic expansion valve opens, and the second electromagnetic expansion valve closes, the fifth circuit in the refrigerant circuit is conducted, and the refrigeration demand can be realized. Among them, the fifth circuit is the circuit formed by the heat dissipation package, the belt compressor, the HAVC air-conditioning system, and the first electromagnetic expansion valve.

[0069] The above processes all belong to the cooling control logic. The present solution also includes the heating control logic:

[0070] Optionally, the low-temperature coolant circuit further includes a fourth circuit formed by the four-way valve, the cooling device, the power battery pack, and the battery water pump. The method further includes:

[0071] When the storage time of the whole machine is greater than the set duration, the battery temperature of the battery is lower than the set threshold and charging is required, and when the engine of the tractor is not started or cannot be started due to insufficient power, control the battery to be connected to the charging pile and heat it with a heating film.

[0072] Optionally, the tractor further includes a high-temperature coolant circuit. The high-temperature coolant circuit includes a sixth circuit formed by a water pump, a water mixer, the HAVC air-conditioning system, an air-conditioning water pump, a thermostat, and an engine assembly. The low-temperature coolant circuit further includes a seventh circuit formed by an oil cooler, a dual-motor controller ( Figure 2 the dual-motor controller two-in-one shown in), a motor water pump, a motor radiator, a generator, and a drive motor. The oil cooler is connected to the motor oil cooling circuit. The method further includes:

[0073] When the engine of the tractor starts normally and the battery has a heating requirement, control the second interface and the third interface of the four-way valve to be connected, control the water pump to work, control the air-conditioning water pump to work, control the air-conditioning warm air core in the HAVC air-conditioning system not to blow air, and control the cooling water of the engine to exchange heat with the battery circuit liquid through the oil cooler.

[0074] Among them, the battery circuit liquid refers to the liquid generated by the battery circuit. When the second interface and the third interface of the four-way valve are connected, the water pump works, and the air-conditioning water pump works, it means that heat exchange can be carried out between the high-temperature coolant circuit corresponding to the engine and the low-temperature coolant circuit, that is, heat exchange is carried out between the first circuit and the seventh circuit.

[0075] While controlling the cooling water of the engine to exchange heat with the battery circuit liquid, the inlet temperature of the battery can also be detected. By controlling the rotation speed of the water pump or the switch of the air-conditioning water pump, the water temperature of the battery circuit is adjusted to be maintained between 35 and 45 to heat the battery; if there is a heating requirement in the passenger compartment, only need to start the warm air core and blow air.

[0076] To better illustrate and understand the principle of the method provided by the present invention, the solution of the present invention will be described below in conjunction with an optional specific embodiment. It should be noted that the specific implementation manners of the steps in this specific embodiment should not be construed as a limitation to the solution of the present invention. Based on the principle of the solution provided by the present invention, other implementation manners that can be conceived by those skilled in the art should also be regarded as within the protection scope of the present invention.

[0077] In this embodiment, the control strategies involved in this solution are divided into a cooling control strategy and a heating control strategy, specifically as follows:

[0078] Cooling control strategy:

[0079] Operating condition 1: During the spring and autumn operation seasons, when the ambient temperature is 5 - 20°C, the battery needs cooling and the passenger compartment has no refrigeration requirement, control the four-way valves 1 and 2 to be connected, the battery water pump works, and the battery heat is taken away by the battery water radiator; it can meet more than 80% of the operating conditions, reduce the work and usage frequency of the compressor, increase the service life and improve fuel economy. If the battery temperature still continues to rise and exceeds the battery first-stage high-temperature alarm threshold, forced cooling is adopted. The VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 closes, the electromagnetic expansion valve 2 opens, and controls the four-way valves 2 and 4 to be connected to cool the battery.

[0080] Operating condition 2: During the spring and autumn operation seasons, when the ambient temperature is 5 - 20°C, the battery needs cooling and the passenger compartment has a refrigeration requirement, control the four-way valves 1 and 2 to be connected, the battery water pump works, and the battery heat is taken away by the battery water radiator; the VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 opens, the battery expansion valve 2 closes, to cool the passenger compartment; if the battery temperature still continues to rise and exceeds the battery first-stage high-temperature alarm threshold, forced cooling is adopted, control the electromagnetic expansion valve 2 to open, control the four-way valves 2 and 4 to be connected, and the compressor cools both the air-conditioning refrigerant and the battery refrigerant circuits.

[0081] Operating condition 3: In the high-temperature season, when the VCU detects that the ambient temperature > 30°C (TBD, determined according to the heat dissipation capacity of the radiator pack), and the battery needs cooling while the passenger compartment has no cooling requirement, the VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 closes, the electromagnetic expansion valve 2 opens, and controls the four-way valves 2 and 4 to be connected to cool the battery.

[0082] Operating condition 4: When the passenger compartment is cooled separately, the VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 opens, and the electromagnetic expansion valve 2 closes to cool the passenger compartment.

[0083] Heating control strategy:

[0084] Condition 1: When the whole machine has been stored for a long time, the battery temperature is low and charging is required, when the engine is not started or cannot be started due to lack of power, the battery is connected to the charging pile and heated by the heating film.

[0085] Condition 2: When the engine starts normally and the battery needs to be heated, the VCU controls the four-way valves 2 and 3 to be connected, controls the water pump to work, the air-conditioning water pump works, and the warm air core does not blow air. The engine cooling water exchanges heat with the liquid in the battery circuit through the oil cooler. At the same time, the temperature of the battery water inlet needs to be detected. By controlling the water pump speed or the air-conditioning water pump switch, the water temperature in the battery circuit is adjusted to be maintained between 35°C and 45°C to heat the battery; if there is a heating demand in the passenger compartment, only the warm air core needs to be started to blow air.

[0086] Through the solution of the present invention, compared with the prior art, there are the following beneficial effects:

[0087] 1. The generator and the drive motor are lubricated and cooled by hydraulic oil, and the heat exchange between the hydraulic oil and the coolant is realized through the oil cooler; the motor water pump circulates the coolant to cool the two-in-one controller and then cools the oil cooler, and the heat is taken away by the motor radiator.

[0088] 2. In the HAVC, the heat of the warm air return circuit is provided by the waste heat of the engine, and the cold air return circuit is refrigerated by the compressor driven by the engine through a belt. The belt compressor is controlled by an electromagnetic clutch to be turned on and off. The air-conditioning evaporator is connected in parallel with the Chiller in the battery circuit, and the two are controlled by two electromagnetic expansion valves to be turned on and off.

[0089] 3. The battery can be cooled through two paths, namely the belt compressor circuit for high-temperature environments in summer; the battery water-cooling circuit for peak seasons in spring and autumn; there are two heating forms, engine water heating and heating by the heating film arranged inside the battery.

[0090] 4. At present, the application time of tractors is mainly concentrated in spring and autumn, and the temperature is generally between 5°C and 15°C. With this solution, the water-cooling temperature can meet the battery cooling requirements. Under the premise of ensuring operation in the working conditions in spring and autumn, the fuel economy of the whole machine is improved.

[0091] Based on the same principle as the method shown in Figure 1 In the present invention, an embodiment also provides a tractor thermal management control system 20, as shown in Figure 3 As shown in, the tractor thermal management control system 20 may include an acquisition module 210 and a cooling module 220, wherein:

[0092] The acquisition module 210 is used to acquire the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery, and the refrigeration requirement of the passenger compartment;

[0093] A cooling module 220, configured to control a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand, and refrigeration demand, so as to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment;

[0094] Wherein, the low-temperature coolant circuit includes a first circuit formed by sequentially connecting a radiator pack, a four-way valve, a battery water pump, and a power battery pack in series. The refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, an HAVC air-conditioning system, a cooling device, and a second electromagnetic expansion valve, and a third circuit formed by the radiator pack, a belt compressor, the cooling device, and the second electromagnetic expansion valve.

[0095] Optionally, the cooling module 220 is specifically configured to:

[0096] When the current operating environment temperature is within a first temperature range, the cooling demand is for cooling, and the refrigeration demand is for no refrigeration, control the first interface and the second interface of the four-way valve to be connected, control the battery water pump to operate, and control the heat of the battery to be dissipated by the battery water in the radiator pack;

[0097] When the current operating environment temperature is within a first temperature range, the cooling demand is for cooling, and the refrigeration demand is for refrigeration, control the first interface and the second interface of the four-way valve to be connected, control the battery water pump to operate, control the heat of the battery to be dissipated by the battery water in the radiator pack, control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close;

[0098] When the current operating environment temperature is within a second temperature range, the cooling demand is for cooling, and the refrigeration demand is for no refrigeration, control the third interface and the fourth interface of the four-way valve to be connected, control the first electromagnetic expansion valve to close, control the second electromagnetic expansion valve to open, and control the clutch of the belt compressor to engage.

[0099] Optionally, when the current operating environment temperature is within a first temperature range, the cooling demand is for cooling, the refrigeration demand is for no refrigeration, and the battery temperature of the battery is greater than a first high-temperature alarm threshold, the system further includes:

[0100] A first forced cooling module, configured to control the clutch of the belt compressor to engage, the first electromagnetic expansion valve to close, the second electromagnetic expansion valve to open, and the second interface and the fourth interface of the four-way valve to be connected, so as to cool the battery.

[0101] Optionally, when the current operating environment temperature is within a first temperature range, the cooling requirement is for cooling, the refrigeration requirement is for refrigeration, and the battery temperature of the battery is greater than a first high-temperature alarm threshold, the system further includes:

[0102] A second forced cooling module, configured to control the second electromagnetic expansion valve to open and control the second port and the fourth port of the four-way valve to be connected.

[0103] Optionally, the system further includes:

[0104] A separate refrigeration module, configured to control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close when the refrigeration requirement is for separate refrigeration.

[0105] Optionally, the low-temperature coolant circuit further includes a fourth circuit formed by the four-way valve, the temperature reduction device, the power battery pack, and the battery water pump, and the system further includes:

[0106] A heating module, configured to control the battery to be connected to a charging pile and heat it using a heating film when the storage time of the whole machine is greater than a set duration, the battery temperature of the battery is lower than a set threshold and charging is required, and the engine of the tractor is not started or cannot be started due to insufficient power.

[0107] A tractor thermal management control device according to an embodiment of the present invention can execute a tractor thermal management control method provided by an embodiment of the present invention, and the implementation principle is similar. The actions performed by each module and unit in a tractor thermal management control device in each embodiment of the present invention correspond to the steps in a tractor thermal management control method in each embodiment of the present invention. For a detailed function description of each module of the tractor thermal management control device, reference can specifically be made to the description in the corresponding tractor thermal management control method shown above, and details are not described herein again.

[0108] Among them, the above-mentioned tractor thermal management control device can be a computer program (including program code) running in a computer device. For example, the tractor thermal management control device is an application software; the device can be used to execute the corresponding steps in the method provided by an embodiment of the present invention.

[0109] In some embodiments, a tractor thermal management control device provided by the embodiments of the present invention can be implemented in a combination of software and hardware. As an example, a tractor thermal management control device provided by the embodiments of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute a tractor thermal management control method provided by the embodiments of the present invention. For example, a processor in the form of a hardware decoding processor can employ one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0110] In other embodiments, a tractor thermal management control device provided by the embodiments of the present invention can be implemented in software. Figure 3 Shown is a tractor thermal management control device stored in a memory, which can be software in the form of programs and plugins, etc., and includes a series of modules, including an acquisition module 210 and a cooling module 220, for implementing a tractor thermal management control method provided by the embodiments of the present invention.

[0111] The modules involved in the embodiments of the present invention can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation to the module itself in some cases.

[0112] Based on the same principle as the method shown in the embodiments of the present invention, embodiments of the present invention also provide an electronic device, which may include, but is not limited to: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the method shown in any embodiment of the present invention by calling the computer program.

[0113] In an alternative embodiment, an electronic device is provided, as Figure 4 shown. Figure 4The electronic device 4000 shown includes a processor 4001 and a memory 4003. Among them, the processor 4001 and the memory 4003 are connected, such as through a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004, and the transceiver 4004 can be used for data interaction between this electronic device and other electronic devices, such as data transmission and / or data reception, etc. It should be noted that in practical applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation to the embodiments of the present invention.

[0114] The processor 4001 can be a CPU (Central Processing Unit, central processor), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application-specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of the present invention. The processor 4001 can also be a combination that realizes computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0115] The bus 4002 may include a path for transmitting information between the above components. The bus 4002 can be a PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus or an EISA (Extended Industry Standard Architecture, extended industry standard architecture) bus, etc. The bus 4002 can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 4 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0116] The memory 4003 can be a ROM (Read Only Memory), or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory), or other types of dynamic storage devices that can store information and instructions. It can also be an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0117] The memory 4003 is used to store the application program code (computer program) for implementing the solution of the present invention and is controlled by the processor 4001 for execution. The processor 4001 is used to execute the application program code stored in the memory 4003 to implement the content shown in the foregoing method embodiments.

[0118] Among them, the electronic device can also be a terminal device. Figure 4 The shown electronic device is only an example and should not impose any limitations on the functions and usage scope of the embodiments of the present invention.

[0119] The embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored. When it runs on a computer, it enables the computer to execute the corresponding content in the foregoing method embodiments.

[0120] According to another aspect of the present invention, there is also provided a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the above various implementation manners of the embodiments.

[0121] Computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0122] It should be understood that the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0123] The computer-readable storage medium provided by the embodiments of the present invention may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0124] The above computer-readable storage medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to execute the method shown in the above embodiments.

[0125] The above description is only a preferred embodiment of the present invention and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of disclosure involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present invention.

Claims

1. A tractor thermal management control method, characterized in that: include: Obtain the current operating environment temperature, battery cooling requirements, and passenger compartment cooling requirements corresponding to the tractor; According to the current operating environment temperature, cooling demand and refrigeration demand, controlling the refrigerant circuit and the low-temperature coolant circuit to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; The low-temperature coolant circuit includes a first circuit formed by a heat dissipation package, a four-way valve, a battery water pump and a power battery pack, and a fourth circuit formed by the four-way valve, a cooling device, a power battery pack and a battery water pump; the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air conditioning system, a cooling device and a second electromagnetic expansion valve, a third circuit formed by a heat dissipation package, a belt compressor, a cooling device and a second electromagnetic expansion valve, and a fifth circuit formed by a heat dissipation package, a belt compressor, a HAVC air conditioning system and a first electromagnetic expansion valve; The tractor further includes a high-temperature coolant circuit, the high-temperature coolant circuit includes a sixth circuit formed by a water pump, a water mixer, a HAVC air conditioning system, an air conditioning water pump, a thermostat and an engine assembly, the low-temperature coolant circuit also includes a seventh circuit formed by an oil heat exchanger, a dual motor controller, a motor water pump, a motor radiator, a generator and a drive motor, the oil heat exchanger is connected to the motor oil radiator circuit, and the method further includes: When the engine of the tractor is started normally and the battery needs to be heated, the second interface and the third interface of the four-way valve are controlled to be connected, the water pump is controlled to work, the air conditioning water pump is controlled to work, the air conditioning warm air core in the HAVC air conditioning system is controlled not to blow air, and the cooling water of the engine is controlled to perform heat exchange with the battery circuit liquid through the oil heat exchanger; The controlling of the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand includes: When the current operating environment temperature is within the first temperature range, the cooling demand is cooling demand, and the refrigeration demand is no refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, and the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack; When the current operating environment temperature is within the first temperature range, the cooling demand is that there is a cooling demand, and the refrigeration demand is that there is a refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed; When the current operating environment temperature is within the second temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the second interface and the fourth interface of the four-way valve are controlled to be connected, the first electromagnetic expansion valve is controlled to be closed, the second electromagnetic expansion valve is controlled to be opened, and the clutch of the belt compressor is controlled to be engaged.

2. The method according to claim 1, characterized in that When the current operating environment temperature is within the first temperature range, the cooling requirement is a cooling requirement, the refrigeration requirement is a no refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The clutch of the belt compressor is controlled to engage, the first electromagnetic expansion valve is closed, the second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected, so as to cool the battery.

3. The method according to claim 1, characterized in that When the current operating environment temperature is within the first temperature range, the cooling requirement is that there is a cooling requirement, the refrigeration requirement is that there is a refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected.

4. The method according to claim 1, characterized in that The method further comprises: When the refrigeration demand is for single refrigeration, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed.

5. The method according to claim 1, characterized in that The method further comprises: When the storage time of the whole machine is greater than the set time, the battery temperature of the battery is lower than the set threshold and needs to be recharged, and the engine of the tractor is not started or the engine cannot be started due to insufficient power, the battery is controlled to be connected to the charging pile and heated by a heating film.

6. A tractor thermal management control system, characterized in that: The tractor thermal management control method according to claim 1 is adopted, and the system comprises: An acquisition module, used to acquire the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the cooling requirement of the passenger compartment; A cooling module, used to control a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand, so as to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by the heat dissipation pack, the four-way valve, the battery water pump and the power battery pack connected in sequence; the refrigerant circuit includes a second circuit formed by the first electromagnetic expansion valve, the HAVC air-conditioning system, the cooling device and the second electromagnetic expansion valve; and a third circuit formed by the heat dissipation pack, the belt compressor, the cooling device and the second electromagnetic expansion valve.

7. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

9. A tractor, characterized in that: Comprising the electronic device as claimed in claim 7.

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