A vehicle thermal management control method, a vehicle thermal management system and a vehicle

Abstract

The application discloses a vehicle thermal management control method, a vehicle thermal management system and a vehicle. The vehicle thermal management control method comprises the following steps: when the engine is running, if a refrigeration request of a cab controller and / or a battery thermal manager is received, an integrated air conditioner is controlled to refrigerate, and a first electric valve and a second electric valve are controlled to be opened; when the engine is running, if a heating request of the cab controller and / or the battery thermal manager is received, a third electric valve is controlled to be opened, so that heat generated by the engine is used to heat the cab or a battery pack. The technical scheme of the embodiment does not need to set more refrigeration elements, reduces manufacturing cost, realizes energy redistribution and utilization, and achieves the energy-saving effect.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a vehicle thermal management control method, a vehicle thermal management system, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicle technology, the application of new energy construction machinery is becoming more and more widespread.

[0003] Hybrid power systems for construction machinery typically consist of a traditional diesel engine and an electric motor. The main purpose is to better integrate the energy-saving and emission-reduction advantages of electric motors with the long-range characteristics of diesel engines.

[0004] During normal operation, to ensure that each system operates within its optimal operating temperature range, the diesel engine of hybrid engineering machinery requires external cooling, while the electric motor's power battery cools or heats itself as needed to maintain a suitable operating temperature. The cab also cools or heats according to the driver's requirements at different ambient temperatures. However, independently cooling or heating each system leads to component duplication, higher costs, and energy waste because different systems cannot share energy. Summary of the Invention

[0005] This invention provides a vehicle thermal management control method, a vehicle thermal management system, and a vehicle, to improve the mutual utilization of energy between various systems and reduce the cost of vehicle thermal management.

[0006] According to one aspect of the present invention, a vehicle thermal management control method is provided, wherein the vehicle includes a vehicle thermal management system; the vehicle thermal management system includes a system controller, an integrated air conditioner, a battery thermal manager, a cab controller, a cab air conditioner, a first electric valve, a second electric valve, and a third electric valve; the first electric valve is connected to the integrated air conditioner, the cab air conditioner, and a battery pack heat exchanger respectively; the second electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger respectively; the third electric valve is connected to the vehicle's engine, the cab air conditioner, and the battery pack heat exchanger respectively; the system controller is connected to the first electric valve, the second electric valve, the third electric valve, the integrated air conditioner, the battery thermal manager, and the cab controller respectively;

[0007] The vehicle thermal management control method is executed by the overall controller, and the method includes:

[0008] When the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the integrated air conditioner is controlled to perform cooling, and the first electric valve and the second electric valve are controlled to open.

[0009] When the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open so that the heat generated by the engine can be used to heat the cab or the battery pack through the third electric valve.

[0010] Optionally, the first end of the first electric valve is connected to the integrated air conditioner, the second end of the first electric valve is connected to the cab air conditioner, and the third end of the first electric valve is connected to the battery pack heat exchanger; the first end of the second electric valve is connected to the integrated air conditioner, the second end of the second electric valve is connected to the cab air conditioner, and the third end of the second electric valve is connected to the battery pack heat exchanger; the first end of the third electric valve is connected to the engine, the second end of the third electric valve is connected to the cab air conditioner, and the third end of the third electric valve is connected to the battery pack heat exchanger.

[0011] When the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the first electric valve and the second electric valve are controlled to open, including:

[0012] If a cooling request is received from the cab controller, the first end of the first electric valve is connected to the second end of the first electric valve, and the first end of the second electric valve is connected to the second end of the second electric valve.

[0013] If a cooling request is received from the battery thermal manager, the first end of the first electric valve is connected to the third end of the first electric valve, and the first end of the second electric valve is connected to the third end of the second electric valve.

[0014] If a cooling request is received from the cab controller and the battery thermal manager, the first end of the first electric valve is connected to the second and third ends of the first electric valve, and the first end of the second electric valve is connected to the second and third ends of the second electric valve, respectively.

[0015] And / or, when the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open, including:

[0016] When the engine is running, if a heating request is received from the cab controller, the first end of the third electric valve is connected to the second end of the third electric valve.

[0017] If a heating request is received from the battery thermal manager, the first end of the third electric valve is controlled to be connected to the third end of the third electric valve.

[0018] If a heating request is received from the cab controller and the battery thermal manager, the first end of the third electric valve is connected to the second and third ends of the third electric valve, respectively.

[0019] Optionally, the vehicle thermal management system further includes a radiator; the fourth end of the third electric valve is connected to the radiator;

[0020] After connecting the first end of the third electric valve to the second end of the third electric valve, the following is also included:

[0021] If the temperature in the cab reaches the first preset heating temperature, then the first end of the third electric valve is disconnected from the second end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve.

[0022] And / or, after controlling the first terminal of the third electric valve to be connected to the third terminal of the third electric valve, the method further includes:

[0023] If the temperature of the battery pack reaches the second preset heating temperature, then the first end of the third electric valve is disconnected from the third end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve.

[0024] Optionally, the vehicle thermal management control method further includes:

[0025] When the engine is not running, if a thermal adjustment request is received from the cab controller and the battery thermal manager, the integrated air conditioner is controlled to perform thermal adjustment, and the first electric valve and the second electric valve are controlled to open; wherein, the thermal adjustment request includes a cooling request and a heating request;

[0026] If the temperature of the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the integrated air conditioner is controlled to stop operating, and the first electric valve and the second electric valve are controlled to close.

[0027] Optionally, before the temperature of the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the method further includes:

[0028] If the temperature of the cab reaches the first target temperature and the temperature of the battery pack does not reach the second target temperature, then the connection between the first electric valve and the second electric valve and the cab air conditioner is disconnected.

[0029] If the temperature of the battery pack reaches the second target temperature and the temperature of the cab does not reach the first target temperature, then the connection between the first electric valve and the second electric valve and the battery pack heat exchanger is disconnected.

[0030] Optionally, before the temperature of the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the method further includes:

[0031] If the temperature of the cab reaches the first target temperature or the temperature of the battery pack reaches the second target temperature, the output power of the integrated air conditioner is reduced.

[0032] Optionally, the vehicle thermal management control method further includes:

[0033] When the engine is not running, if a cooling request is received from one component of the cab controller and the battery thermal manager and a heating request from another component, the first electric valve and the second electric valve are opened, and the integrated air conditioner is put into heat exchange mode.

[0034] If the temperature of the cab reaches the third target temperature or the temperature of the battery pack reaches the fourth target temperature, the integrated air conditioner is controlled to cool or heat.

[0035] If the temperature in the cab reaches the third target temperature and the temperature in the battery pack reaches the fourth target temperature, the integrated air conditioner will be controlled to stop operating, and the first electric valve and the second electric valve will be controlled to shut off.

[0036] According to another aspect of the present invention, a vehicle thermal management system is provided, comprising: a whole-machine controller, an integrated air conditioner, a battery thermal manager, a cab controller, a cab air conditioner, a first electric valve, a second electric valve, and a third electric valve;

[0037] The first electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger, respectively; the second electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger, respectively.

[0038] The overall controller is connected to the first electric valve, the second electric valve, the integrated air conditioner, the battery thermal manager, and the cab controller respectively. When the engine is running, if the overall controller receives a cooling request from the cab controller and / or the battery thermal manager, it controls the integrated air conditioner to perform cooling and controls the first electric valve and the second electric valve to open.

[0039] The third electric valve is connected to the engine, the cab air conditioner, and the battery pack heat exchanger respectively. The whole machine controller is also connected to the third electric valve. The whole machine controller is also used to control the third electric valve to open when the engine is running, if it receives a heating request from the cab controller and / or the battery thermal manager, so that the heat generated by the engine can be used to heat the cab or the battery pack through the third electric valve.

[0040] Optionally, the vehicle thermal management system also includes a radiator;

[0041] The third electric valve is connected to the radiator.

[0042] According to another aspect of the present invention, a vehicle is provided, the vehicle including the vehicle thermal management system described in any embodiment of the present invention.

[0043] The technical solution of this invention, when the engine is running, if a cooling request is received from the cab controller or battery thermal manager, the integrated air conditioner is controlled to cool, and the first and second electric valves are opened; if a heating request is received from the cab controller or battery thermal manager, the third electric valve is opened, so that the heat generated by the engine can heat the cab or battery pack through the third electric valve. Thus, a single integrated air conditioner can regulate the cooling of both the cab and the battery pack, allowing different components in the vehicle to share the integrated air conditioner, eliminating the need for numerous cooling components and reducing manufacturing costs. Furthermore, using the heat generated by the engine to heat the battery pack or cab achieves energy redistribution and utilization, resulting in energy savings and reduced energy management costs.

[0044] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart of a vehicle thermal management control method provided in an embodiment of the present invention;

[0047] Figure 2 This is a flowchart of another vehicle thermal management control method provided in an embodiment of the present invention;

[0048] Figure 3 This is a flowchart of another vehicle thermal management control method provided in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the structure of a vehicle thermal management system provided in an embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram of another vehicle thermal management system provided in an embodiment of the present invention. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] The vehicle includes a vehicle thermal management system; the vehicle thermal management system includes a main unit controller, an integrated air conditioner, a battery thermal manager, a cab controller, a cab air conditioner, a first electric valve, a second electric valve, and a third electric valve; the first electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger respectively; the second electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger respectively; the third electric valve is connected to the vehicle's engine, the cab air conditioner, and the battery pack heat exchanger respectively; the main unit controller is connected to the first electric valve, the second electric valve, the third electric valve, the integrated air conditioner, the battery thermal manager, and the cab controller respectively.

[0054] The vehicle, for example, is a hybrid vehicle, which can be driven by an engine (pure gasoline drive mode), a battery pack (pure electric drive mode), or a combination of both (gasoline-electric hybrid drive mode), achieving different driving modes. To ensure normal vehicle operation, a vehicle thermal management system is installed. This system regulates the temperature of internal components to prevent excessively high or low temperatures that could affect normal vehicle operation. The battery pack heat exchanger, for example, is a grille surrounding the battery pack. When the medium in the heat exchanger is low-temperature, it absorbs heat from the battery pack, providing cooling; when the medium is high-temperature, it heats the battery pack. The integrated air conditioning system contains a compressor, condenser, and heat exchanger, enabling cooling, heating, and heat exchange. The cab air conditioning system includes an evaporator and fan; the cab air conditioning unit is, for example, the indoor unit of an air conditioner.

[0055] For example, the first electric valve transmits a high-temperature medium, and the second electric valve transmits a low-temperature medium. When heating is required for the cab air conditioner and battery pack, the integrated air conditioner provides a high-temperature medium to the heat exchanger of the cab air conditioner and battery pack through the first electric valve. The high-temperature medium provides heat to the cab air conditioner and battery pack, achieving heating regulation. After absorbing heat, the cab air conditioner and battery pack convert the high-temperature medium into a low-temperature medium and discharge it. The low-temperature medium then enters the integrated air conditioner through the first electric valve. When cooling is required for the cab air conditioner and battery pack, the integrated air conditioner provides a low-temperature medium to the battery pack heat exchanger of the cab air conditioner and battery pack through the first electric valve. The low-temperature medium absorbs heat from the cab and battery pack, achieving cooling regulation. After absorbing heat from the cab and battery pack, the low-temperature medium converts into a high-temperature medium, which then passes through the first electric valve to the integrated air conditioner.

[0056] Figure 1 This is a flowchart of a vehicle thermal management control method provided in an embodiment of the present invention. The vehicle thermal management control method is executed by the aforementioned overall controller, such as... Figure 1 As shown, the method includes:

[0057] S110. When the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the integrated air conditioner is controlled to perform cooling, and the first electric valve and the second electric valve are controlled to open.

[0058] The battery thermal manager is connected to the battery pack and can acquire the battery pack's temperature. When the battery pack temperature is too high and needs adjustment, the battery thermal manager sends a cooling request to the vehicle controller. When the occupants of the vehicle need cooling, they operate the cab controller, which then sends a cooling request to the vehicle controller. The cab air conditioner, for example, is an indoor unit that uses refrigerant to cool the cab.

[0059] Specifically, when the engine is running, the vehicle operates in either pure gasoline drive mode or hybrid electric drive mode. When the vehicle controller receives a cooling request from the cab controller, it controls the integrated air conditioning system to cool the cab. The integrated air conditioning system provides a low-temperature medium to the cab air conditioning system via a second electric valve, cooling the cab. The low-temperature medium absorbs heat and converts into a high-temperature medium, lowering the cab temperature. The high-temperature medium is then transferred to the integrated air conditioning system via a first electric valve, completing one cycle. When the vehicle controller receives a cooling request from the battery thermal manager, it controls the integrated air conditioning system to cool the cab. The integrated air conditioning system provides a low-temperature medium to the battery pack heat exchanger via a second electric valve. The low-temperature medium absorbs heat and converts into a high-temperature medium, lowering the battery pack temperature. The high-temperature medium is then transferred to the integrated air conditioning system via a first electric valve, completing one cycle.

[0060] In this way, the cabin and battery pack can be cooled by an integrated air conditioner, eliminating the need for a separate battery cooling system, reducing the number of cooling components and lowering the cost of energy management.

[0061] S120. When the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open so that the heat generated by the engine can be used to heat the cab or battery pack through the third electric valve.

[0062] Specifically, when the engine is running, the vehicle operates in either pure gasoline drive mode or hybrid electric drive mode. When occupants require heating, a heating request is sent from the cab controller to the vehicle controller. Upon receiving this request, the vehicle controller opens a third electric valve, allowing heat generated by the engine to be transferred to the cab for heating. Similarly, when the battery thermal manager detects that the battery pack temperature is too low, it sends a heating request to the vehicle controller. Upon receiving this request, the vehicle controller opens a third electric valve, transferring heat generated by the engine to the battery pack's heat exchanger for heating. This heat may be transferred, for example, via engine coolant through a high-temperature water circuit to the cab air conditioner or the battery pack's heat exchanger for heating.

[0063] In this way, by using the heat generated by the engine to heat the cab or battery pack, energy is redistributed and utilized, eliminating the need for heating through an integrated air conditioner, reducing the power consumption of the integrated air conditioner, and achieving energy-saving effects.

[0064] It should be noted that steps S110 and S120 can be executed sequentially; step S110 can be executed first and then step S120, or vice versa. Steps S110 and S120 can also be performed concurrently. Figure 1 The flowchart shown is for illustrative purposes only and does not limit the execution order of steps S110 and S120.

[0065] In this embodiment, when the engine is running, if a cooling request is received from the cab controller or battery thermal manager, the integrated air conditioner is controlled to cool, and the first and second electric valves are opened. If a heating request is received from the cab controller or battery thermal manager, the third electric valve is opened, so that the heat generated by the engine can heat the cab or battery pack through the third electric valve. Thus, a single integrated air conditioner can regulate the cooling of both the cab and the battery pack, allowing different components in the vehicle to share the integrated air conditioner, eliminating the need for numerous cooling components and reducing manufacturing costs. Furthermore, using the heat generated by the engine to heat the battery pack or cab achieves energy redistribution and utilization, resulting in energy savings and reduced energy management costs.

[0066] Based on the above technical solution, the first end of the first electric valve is connected to the integrated air conditioner, the second end of the first electric valve is connected to the cab air conditioner, and the third end of the first electric valve is connected to the battery pack heat exchanger; the first end of the second electric valve is connected to the integrated air conditioner, the second end of the second electric valve is connected to the cab air conditioner, and the third end of the second electric valve is connected to the battery pack heat exchanger; the first end of the third electric valve is connected to the vehicle's engine, the second end of the third electric valve is connected to the cab air conditioner, and the third end of the third electric valve is connected to the battery pack heat exchanger. For example, the vehicle thermal management system includes a first high-temperature pipeline, a second high-temperature pipeline, a first low-temperature pipeline, a second low-temperature pipeline, a third high-temperature pipeline, and a fourth high-temperature pipeline. The second end of the first electric valve is connected to the cab air conditioner through the first high-temperature pipeline, and the third end of the first electric valve is connected to the battery pack heat exchanger through the second high-temperature pipeline. The first electric valve transmits a high-temperature medium through the first and second high-temperature pipelines. The second end of the second electric valve is connected to the cab air conditioner via the first low-temperature pipeline, and the third end of the second electric valve is connected to the battery pack heat exchanger via the second low-temperature pipeline. The second electric valve transmits low-temperature media through the first and second low-temperature pipelines. The second end of the third electric valve is connected to the cab air conditioner via the third high-temperature pipeline, and the third end of the third electric valve is connected to the battery pack heat exchanger via the fourth high-temperature pipeline. The third electric valve transmits high-temperature media through the third and fourth high-temperature pipelines.

[0067] Optionally, when the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the first electric valve and the second electric valve are controlled to open, including:

[0068] Step a1: If a cooling request is received from the cab controller, the first end of the first electric valve is connected to the second end of the first electric valve, and the first end of the second electric valve is connected to the second end of the second electric valve.

[0069] Specifically, the low-temperature medium output from the integrated air conditioner flows into the second electric valve through the first end of the second electric valve, and then into the cab air conditioner through the second end of the second electric valve. The low-temperature medium absorbs heat, thus lowering the temperature in the cab. After absorbing heat in the cab air conditioner, the low-temperature medium is converted into a high-temperature medium. The high-temperature medium flows into the first electric valve through the second end of the first electric valve, and then into the integrated air conditioner. The integrated air conditioner, in cooling mode, converts the high-temperature medium back into a low-temperature medium and continues to output it to the second electric valve, thereby achieving a cooling cycle and cooling the cab.

[0070] Step a2: If a cooling request is received from the battery thermal manager, then control the first end of the first electric valve to be connected to the third end of the first electric valve, and the first end of the second electric valve to be connected to the third end of the second electric valve.

[0071] Specifically, the low-temperature medium output from the integrated air conditioner flows into the second electric valve through the first end of the second electric valve, and then into the battery pack heat exchanger through the third end of the second electric valve. The low-temperature medium absorbs heat, causing the battery pack temperature to decrease. After absorbing heat in the cab air conditioner, the low-temperature medium is converted into a high-temperature medium. The high-temperature medium flows into the first electric valve through the third end of the first electric valve, and then into the integrated air conditioner. The integrated air conditioner is in cooling mode, converting the high-temperature medium back into a low-temperature medium, and continues to output it to the second electric valve, thereby realizing a cooling cycle and cooling the battery pack.

[0072] Step a3: If a cooling request is received from the cab controller and the battery thermal manager, the first end of the first electric valve is connected to the second and third ends of the first electric valve, and the first end of the second electric valve is connected to the second and third ends of the second electric valve.

[0073] Specifically, upon simultaneously receiving cooling requests from both the cab controller and the battery thermal manager, the low-temperature medium output by the integrated air conditioning system flows to the second and third ends of the second electric valve, respectively, simultaneously cooling the cab and the battery pack until the cab temperature reaches the first preset cooling temperature and the battery pack temperature reaches the second preset cooling temperature, at which point the first and second electric valves are shut off. Here, shutting off the first and second electric valves means that neither end of the electric valve is connected.

[0074] Optionally, after step a3, if a cooling request is received from the cab controller and the battery thermal manager, and the first terminal of the first electric valve is connected to the second and third terminals of the first electric valve respectively, and the first terminal of the second electric valve is connected to the second and third terminals of the second electric valve respectively, the method further includes:

[0075] Step a4: If the temperature in the cab reaches the first preset cooling temperature and the temperature of the battery pack does not reach the second preset cooling temperature, then control the output power of the integrated air conditioner to decrease, and control the connection between the first end of the first electric valve and the second end of the first electric valve to be disconnected, and control the connection between the first end of the second electric valve and the second end of the second electric valve to be disconnected.

[0076] Specifically, once the temperature in the cab reaches the first preset cooling temperature, there is no need to transmit refrigerant to the cab air conditioner. By controlling the output power of the integrated air conditioner to decrease, the power consumption of the integrated air conditioner can be reduced, thus achieving energy saving.

[0077] Step a5: If the temperature of the battery pack reaches the second preset cooling temperature and the temperature of the cab does not reach the first preset cooling temperature, then control the output power of the integrated air conditioner to decrease, and control the connection between the first end of the first electric valve and the third end of the first electric valve to be disconnected, and control the connection between the first end of the second electric valve and the third end of the second electric valve to be disconnected.

[0078] Specifically, when the battery pack reaches the second preset cooling temperature, there is no need to transfer the cooling medium to the battery pack heat exchanger. This reduces the output power of the integrated air conditioner, thereby reducing its power consumption and achieving energy saving.

[0079] Step a6: If the temperature in the cab reaches the first preset cooling temperature and the temperature in the battery pack reaches the second preset cooling temperature, then control the integrated air conditioner to stop and control the first and second electric valves to close.

[0080] Optionally, when the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open, including:

[0081] Step b1: When the engine is running, if a heating request is received from the cab controller, the first end of the third electric valve is connected to the second end of the third electric valve.

[0082] Specifically, the first end of the third electric valve is connected to the second end of the third electric valve. The heat generated by the engine flows into the first end of the third electric valve through the engine coolant, and then flows into the cab air conditioner through the second end of the third electric valve. The cab air conditioner absorbs the heat and heats the cab, thus realizing the use of the heat generated by the engine to heat the cab and achieving the effect of energy saving.

[0083] Step b2: If a heating request is received from the battery thermal manager, the first end of the third electric valve is connected to the third end of the third electric valve.

[0084] Specifically, the first end of the third electric valve is connected to the third end of the third electric valve. The heat generated by the engine flows into the first end of the third electric valve through the engine coolant as a medium, and then flows into the battery pack heat exchanger through the third end of the third electric valve. The battery pack absorbs the heat and generates heat, thus realizing the use of the heat generated by the engine to heat the battery pack, achieving the effect of energy saving.

[0085] Step b3: If a heating request is received from the cab controller and the battery thermal manager, the first end of the third electric valve is connected to the second and third ends of the third electric valve, respectively.

[0086] In this way, the heat generated by the engine can simultaneously heat the cab and the battery pack until the temperature of the cab reaches the first preset heating temperature and the temperature of the battery pack reaches the second preset heating temperature, at which point the third electric valve is shut off, thereby meeting the heating needs of the cab and the battery pack.

[0087] Furthermore, the vehicle thermal management system also includes a radiator; the third pipeline also includes a fifth high-temperature pipeline, and the fourth end of the third electric valve is connected to the radiator. For example, the vehicle thermal management system further includes a fifth high-temperature pipeline, and the fourth end of the third electric valve is connected to the radiator via the fifth high-temperature pipeline.

[0088] Optionally, after the first end of the third electric valve is connected to the second end of the third electric valve, the following further includes:

[0089] If the temperature in the cab reaches the first preset heating temperature, the first end of the third electric valve is disconnected from the second end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve.

[0090] Specifically, when the engine is running, if only a heating request is received from the cab controller, once the cab temperature reaches the first preset heating temperature, the first and second terminals of the third electric valve are disconnected, preventing the heat generated by the engine from being transferred to the cab and thus avoiding further increases in cab temperature after reaching the first preset heating temperature. Alternatively, by connecting the first and fourth terminals of the third electric valve, the heat generated by the engine is transferred to the radiator, preventing the engine temperature from becoming too high and affecting vehicle operation.

[0091] Optionally, after controlling the first end of the third electric valve to be connected to the second end of the third electric valve, the method further includes: if the temperature in the cab does not reach the first preset heating temperature and the engine stops running, then controlling the integrated air conditioner to enter the heating mode and controlling the first electric valve and the second electric valve to open.

[0092] In this way, after the engine stops generating heat, the integrated air conditioning system continues to provide heating to meet the heating needs of the cab.

[0093] Optionally, after the first terminal of the third electric valve is connected to the third terminal of the third electric valve, the following further step is included:

[0094] If the battery pack temperature reaches the second preset heating temperature, the first end of the third electric valve is disconnected from the third end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve.

[0095] Specifically, when the engine is running, if only a heating request is received from the battery pack controller, after the battery pack temperature reaches the second preset heating temperature, the first end of the third electric valve is disconnected from the third end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve, so that the heat of the engine is discharged to the radiator, and the radiator dissipates heat to avoid the engine temperature from being too high and affecting the operation of the vehicle.

[0096] Based on the above technical solutions, when the engine is not running and only the battery pack is driving, the vehicle operates in pure electric drive mode. The following section explains the vehicle's thermal management control method in conjunction with the control methods used when the vehicle is operating in pure electric drive mode.

[0097] Figure 2 This is a flowchart of another vehicle thermal management control method provided in an embodiment of the present invention. Optionally, refer to... Figure 2 Vehicle thermal management control methods include:

[0098] S210. Determine whether the engine is running. If yes, proceed to step S220; otherwise, proceed to step S240.

[0099] Specifically, when the engine is running, if heating is required, the third electric valve must be opened, and the heat generated by the engine provides heat to the cab and / or battery pack through the third electric valve. When the engine is not running, if heating is required, the first and second electric valves must be opened to provide heat to the cab or battery pack. Therefore, before starting cooling or heating, it is necessary to determine whether the engine is running to facilitate control of the electric valves.

[0100] S220: If a cooling request is received from the cab controller and / or the battery thermal manager, the integrated air conditioner is controlled to perform cooling, and the first electric valve and the second electric valve are controlled to open.

[0101] S230: If a heating request is received from the cab controller and / or battery thermal manager, the third electric valve is opened so that the heat generated by the engine can be used to heat the cab or battery pack through the third electric valve.

[0102] S240. If a thermal adjustment request is received from the cab controller and the battery thermal manager, the integrated air conditioner is controlled to perform thermal adjustment, and the first electric valve and the second electric valve are controlled to open; wherein, the thermal adjustment request includes a cooling request and a heating request.

[0103] Specifically, the integrated air conditioner adjusts the temperature according to heat regulation requests. When it receives a cooling request from the cab controller and the battery thermal manager, it controls the integrated air conditioner to perform cooling operation; when it receives a heating request from the cab controller and the battery thermal manager, it controls the integrated air conditioner to perform heating operation. It also controls the first and second terminals of the first electric valve to be connected, as well as the first and third terminals of the second electric valve, to be connected; thus, the integrated air conditioner regulates the temperature of the cab and battery pack through the first and second electric valves. In this way, when the engine is not running, cooling and heating operations for the cab and battery pack can be achieved through a single integrated air conditioner, eliminating the need for numerous heat regulation components and reducing manufacturing costs.

[0104] S250: If the temperature in the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the integrated air conditioner will be stopped, and the first and second electric valves will be shut off.

[0105] Specifically, the first target temperature is the temperature that the cab needs to reach, for example, a cooling or heating request sent by the cab controller that includes the first target temperature; the second target temperature is, for example, the temperature that the battery pack needs to reach, for example, a cooling or heating request sent by the battery thermal manager that includes the second target temperature. The system controller controls the integrated air conditioner, the first electric valve, and the second electric valve based on the first and second target temperatures. After the temperature in the cab reaches the first target temperature and the temperature in the battery pack reaches the second target temperature, the system controller stops the integrated air conditioner and shuts off the first and second electric valves, thereby regulating the temperature of the cab and the battery pack.

[0106] As a further implementation of this embodiment, based on the above technical solution, Figure 3 This is a flowchart of another vehicle thermal management control method provided in an embodiment of the present invention. Optionally, refer to... Figure 3 Vehicle thermal management control methods include:

[0107] S301. Determine whether the engine is running. If yes, proceed to step S302 or step S303; otherwise, proceed to step S304.

[0108] S302. If a cooling request is received from the cab controller and / or the battery thermal manager, the integrated air conditioner is controlled to perform cooling, and the first electric valve and the second electric valve are controlled to open.

[0109] S303. If a heating request is received from the cab controller and / or battery thermal manager, the third electric valve is opened so that the heat generated by the engine can be used to heat the cab or battery pack through the third electric valve.

[0110] S304. If a thermal adjustment request is received from the cab controller and the battery thermal manager, the integrated air conditioner is controlled to perform thermal adjustment, and the first electric valve and the second electric valve are controlled to open; wherein, the thermal adjustment request includes a cooling request and a heating request.

[0111] S305. Determine whether the temperature of the cab has reached the first target temperature and whether the temperature of the battery pack has not reached the second target temperature. If yes, proceed to step S306; otherwise, proceed to step S308.

[0112] Specifically, the first target temperature is, for example, the temperature set by the user. To ensure the cab temperature reaches this first target temperature, the cab temperature needs to be assessed and compared with the first target temperature during cooling or heating operations to facilitate temperature adjustment. Similarly, to ensure the battery pack temperature reaches the second target temperature, the battery pack temperature needs to be assessed during cooling or heating operations to facilitate temperature adjustment. The first and second target temperatures may differ; therefore, during the temperature adjustment of both the cab and battery pack, the cab temperature may reach the first target temperature first. By determining whether the cab temperature has reached the first target temperature and whether the battery pack temperature has not reached the second target temperature, the temperature status of the battery pack and cab can be accurately determined, thus facilitating coordinated control of the overall vehicle temperature.

[0113] S306, Disconnect the first and second electric valves from the cab air conditioner.

[0114] Specifically, when the temperature in the cab reaches the first target temperature but the temperature of the battery pack does not reach the second target temperature, the connection between the first and second electric valves and the cab air conditioner is disconnected. That is, the connection between the first end of the first electric valve and the second end of the first electric valve is disconnected, and the connection between the first end of the second electric valve and the second end of the second electric valve is disconnected. The integrated air conditioner stops regulating the temperature of the cab (cooling or heating) but continues to regulate the temperature of the battery pack (cooling or heating).

[0115] S307, Controls the reduction of output power of integrated air conditioners.

[0116] Specifically, when the temperature in the cab reaches the first target temperature or the temperature of the battery pack reaches the second target temperature, the integrated air conditioner does not need to perform thermal regulation for the two components. After reducing the output power of the integrated air conditioner, it can still meet the thermal regulation requirements and reduce the power consumption of the integrated air conditioner, which is beneficial to energy saving.

[0117] S308. Determine whether the temperature of the cab has reached the first target temperature and whether the temperature of the battery pack has reached the second target temperature. If yes, proceed to step S309; ​​otherwise, return to step S308.

[0118] S309. Control the integrated air conditioner to stop operating and control the first electric valve and the second electric valve to shut off.

[0119] S310. Determine whether the temperature of the cab has not reached the first target temperature and whether the temperature of the battery pack has reached the second target temperature. If yes, proceed to step S311; otherwise, proceed to step S312.

[0120] Specifically, the first target temperature and the second target temperature may be different. During the temperature regulation of the cab and the battery pack, there may be a situation where the temperature of the battery pack reaches the second target temperature first. By judging whether the temperature of the cab has not reached the first target temperature and whether the temperature of the battery pack has reached the second target temperature, it is easy to determine the temperature status of the battery pack and the cab, thereby facilitating the coordinated control of the overall vehicle temperature regulation.

[0121] S311, Disconnect the first and second electric valves from the battery pack heat exchanger.

[0122] Specifically, when the battery pack temperature reaches the second target temperature but the cab temperature does not reach the first target temperature, the connection between the first and second electric valves and the battery pack heat exchanger is disconnected. That is, the connection between the first and third ends of the first electric valve and the connection between the first and third ends of the second electric valve are disconnected. The integrated air conditioner stops regulating the battery pack (cooling or heating) but continues to regulate the cab (cooling or heating).

[0123] S312. Determine whether the temperature of the cab has not reached the first target temperature and whether the temperature of the battery pack has not reached the second target temperature. If yes, return to step S305; otherwise, proceed to step S309.

[0124] Specifically, if the cab temperature does not reach the first target temperature and the battery pack temperature does not reach the second target temperature, the cab and battery pack temperatures still need to be adjusted, and the cab and battery pack temperatures need to be reassessed.

[0125] Based on the above technical solutions, the vehicle thermal management control method may optionally include:

[0126] Step c1: When the engine is not running, if a cooling request is received from one component of the cab controller and the battery thermal manager and a heating request from another component, the first electric valve and the second electric valve are opened, and the integrated air conditioner is put into heat exchange mode.

[0127] Specifically, when the cab controller and battery thermal management simultaneously send thermal regulation requests, but the requests are different (i.e., one component sends a cooling request and the other sends a heating request), the overall controller controls the opening of the first and second electric valves. Specifically, it controls the first and third terminals of the first electric valves to be connected, and the first and third terminals of the second electric valves to be connected. It also controls the integrated air conditioning system to enter heat exchange mode, where a low-temperature medium is transferred to the component that issued the cooling request. This low-temperature medium absorbs heat and transforms into a high-temperature medium, which is then transferred to the integrated air conditioning system. The integrated air conditioning system then transfers the high-temperature medium to the component that issued the heating request. After heating, the high-temperature medium transforms into a low-temperature medium and is then transferred to the integrated air conditioning system, thus achieving heat exchange.

[0128] Step c2: If the temperature in the cab reaches the third target temperature or the temperature of the battery pack reaches the fourth target temperature, control the integrated air conditioner to cool or heat.

[0129] Specifically, when the temperature in the cab reaches the third target temperature or the temperature in the battery pack reaches the fourth target temperature, meaning that the temperature of one component in the cab or battery pack reaches the required temperature, the integrated air conditioner does not need to perform heat exchange. The integrated air conditioner is then controlled to exit the heat exchange mode and, based on the target temperature of the other component, is controlled to cool or heat the other component.

[0130] Step c3: If the temperature in the cab reaches the third target temperature and the temperature of the battery pack reaches the fourth target temperature, then control the integrated air conditioner to stop operating and control the first electric valve and the second electric valve to shut off.

[0131] Specifically, the third target temperature is the temperature that the cab needs to reach, and the fourth target temperature is, for example, the temperature that the battery pack needs to reach. When the temperature in the cab reaches the third target temperature and the temperature in the battery pack reaches the fourth target temperature, the integrated air conditioner is controlled to stop operating, and the first electric valve and the second electric valve are controlled to close, thus completing the temperature regulation of the cab and the battery pack.

[0132] The technical solution of this embodiment also provides a vehicle thermal management system. Figure 4This is a schematic diagram of a vehicle thermal management system provided in an embodiment of the present invention, for reference. Figure 4 The vehicle thermal management system includes: a main unit controller 401, an integrated air conditioner 402, a battery thermal manager 403, a cab controller 404, a cab air conditioner 405, a first electric valve 406, a second electric valve 407, and a third electric valve 408; the first electric valve 406 is connected to the integrated air conditioner 402, the cab air conditioner 405, and the battery pack heat exchanger 502; the second electric valve 407 is connected to the integrated air conditioner 402, the cab air conditioner 405, and the battery pack heat exchanger 502; the main unit controller 401 is connected to the first electric valve 406, the second electric valve 407, the integrated air conditioner 402, the battery thermal manager 403, and the cab controller 404; the main unit controller 401 is used to control the engine 5 When the engine 503 is running, if a cooling request is received from the cab controller 404 and / or the battery thermal manager 403, the integrated air conditioner 402 is controlled to perform cooling, and the first electric valve 406 and the second electric valve 407 are controlled to open. The third electric valve 408 is connected to the engine 503, the cab air conditioner 405 and the battery pack heat exchanger 502 respectively. The whole machine controller 401 is also connected to the third electric valve 408. The whole machine controller 401 is also used to control the third electric valve 408 to open when the engine 503 is running, if a heating request is received from the cab controller 404 and / or the battery thermal manager 403, so that the heat generated by the engine 503 can heat the cab 504 or the battery pack 501 through the third electric valve 408.

[0133] Specifically, by setting up the overall controller 401, thermal management of the cab and battery pack can be achieved, realizing coordinated management of the entire vehicle. The integrated air conditioner 402 regulates the cooling of the cab 504 and battery pack 501, allowing different components in the vehicle to share the integrated air conditioner 402, eliminating the need for numerous cooling components and reducing manufacturing costs. Furthermore, the heat generated by the engine 503 heats either the cab 504 or the battery pack 501, achieving energy redistribution and utilization, resulting in energy savings and reducing energy management costs.

[0134] Optionally, continue to refer to Figure 4The vehicle thermal management system also includes a first high-temperature pipe 11, a second high-temperature pipe 12, a first low-temperature pipe 13, a second low-temperature pipe 14, a third high-temperature pipe 15, and a fourth high-temperature pipe 16; the first end of the first electric valve 406 is connected to the integrated air conditioner 402, the second end of the first electric valve 406 is connected to the cab air conditioner 405 through the first high-temperature pipe 11, and the third end of the first electric valve 406 is connected to the battery pack heat exchanger 502 through the second high-temperature pipe 12; the first end of the second electric valve 407 is connected to the integrated air conditioner 402. The second end of the second electric valve 407 is connected to the cab air conditioner 405 via the first low-temperature pipe 13, and the third end of the second electric valve 407 is connected to the battery pack heat exchanger 502 via the second low-temperature pipe 14; the first end of the third electric valve 408 is connected to the vehicle engine 503, the second end of the third electric valve 408 is connected to the cab air conditioner 405 via the third high-temperature pipe 15, and the third end of the third electric valve 408 is connected to the battery pack heat exchanger 502 via the fourth high-temperature pipe 16.

[0135] Specifically, the first high-temperature pipe 11 and the second high-temperature pipe 12 transmit high-temperature media to the integrated air conditioning 402; the first low-temperature pipe 13 and the second low-temperature pipe 14 transmit low-temperature media to the integrated air conditioning 402; and the third high-temperature pipe 15 and the fourth high-temperature pipe 16 transmit heat generated by the engine 503. For example, if engine coolant is used as the medium for transmission, then the third high-temperature pipe 15 and the fourth high-temperature pipe 16 are high-temperature water circuits. By setting up these pipes, a heat regulation medium is provided to the cab air conditioning 405 and the battery pack heat exchanger 502 of the battery pack 501, facilitating heat regulation of the cab 504 and the battery pack 501.

[0136] Based on the above technical solutions, Figure 5 This is a schematic diagram of another vehicle thermal management system provided in an embodiment of the present invention. Optionally, refer to... Figure 5 The vehicle thermal management system also includes a radiator 409; a third electric valve 408 is connected to the radiator 409.

[0137] For example, the vehicle thermal management system also includes a fifth high-temperature pipeline 17, through which the third electric valve 408 is connected to the radiator 409 to facilitate the transfer of excess heat to the radiator 409 for heat dissipation.

[0138] Optionally, continue to refer to Figure 5The vehicle thermal management system also includes a mechanical four-way connector 21, a third low-temperature pipe 22, a fourth low-temperature pipe 23, and a fifth low-temperature pipe 24. The first end of the mechanical four-way connector 21 is connected to the engine, the second end of the mechanical four-way connector 21 is connected to the cab air conditioner 405 through the third low-temperature pipe 22, the third end of the mechanical four-way connector 21 is connected to the battery pack heat exchanger 502 of the battery pack 501 through the fourth low-temperature pipe 23, and the fourth end of the mechanical four-way connector 21 is connected to the radiator 409 through the fifth low-temperature pipe 24.

[0139] In this way, after the cab air conditioner 405 and the battery pack heat exchanger 502 absorb the heat of the high-temperature medium, they discharge the low-temperature medium from the low-temperature pipe to the radiator 409, thus realizing a circulation path and facilitating the heating of the cab and the battery pack.

[0140] The technical solution of this embodiment also provides a vehicle, which includes the vehicle thermal management system provided in any of the above embodiments. Therefore, it has the same beneficial effects as the vehicle thermal management system provided in any embodiment of the present invention, and will not be described again here.

[0141] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0142] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A vehicle thermal management control method, characterized in that, The vehicle includes a vehicle thermal management system; the vehicle thermal management system includes a main unit controller, an integrated air conditioner, a battery thermal manager, a cab controller, a cab air conditioner, a first electric valve, a second electric valve, and a third electric valve; the first electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger; the second electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger; the third electric valve is connected to the vehicle's engine, the cab air conditioner, and the battery pack heat exchanger; the main unit controller is connected to the first electric valve, the second electric valve, the third electric valve, the integrated air conditioner, the battery thermal manager, and the cab controller. The vehicle thermal management control method is executed by the overall controller, and the method includes: When the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the integrated air conditioner is controlled to perform cooling, and the first electric valve and the second electric valve are controlled to open. When the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open so that the heat generated by the engine can be used to heat the cab or the battery pack through the third electric valve. When the engine is not running, if a cooling request is received from one component of the cab controller and the battery thermal manager and a heating request from another component, the first electric valve and the second electric valve are opened, and the integrated air conditioner is put into heat exchange mode. If the temperature of the cab reaches the third target temperature or the temperature of the battery pack reaches the fourth target temperature, the integrated air conditioner is controlled to cool or heat. If the temperature of the cab reaches the third target temperature and the temperature of the battery pack reaches the fourth target temperature, the integrated air conditioner will be controlled to stop operating, and the first electric valve and the second electric valve will be controlled to shut off.

2. The method according to claim 1, characterized in that, The first end of the first electric valve is connected to the integrated air conditioner, the second end of the first electric valve is connected to the cab air conditioner, and the third end of the first electric valve is connected to the battery pack heat exchanger; the first end of the second electric valve is connected to the integrated air conditioner, the second end of the second electric valve is connected to the cab air conditioner, and the third end of the second electric valve is connected to the battery pack heat exchanger; the first end of the third electric valve is connected to the engine, the second end of the third electric valve is connected to the cab air conditioner, and the third end of the third electric valve is connected to the battery pack heat exchanger. When the engine is running, if a cooling request is received from the cab controller and / or the battery thermal manager, the first electric valve and the second electric valve are controlled to open, including: If a cooling request is received from the cab controller, the first end of the first electric valve is connected to the second end of the first electric valve, and the first end of the second electric valve is connected to the second end of the second electric valve. If a cooling request is received from the battery thermal manager, the first end of the first electric valve is connected to the third end of the first electric valve, and the first end of the second electric valve is connected to the third end of the second electric valve. If a cooling request is received from the cab controller and the battery thermal manager, the first end of the first electric valve is connected to the second and third ends of the first electric valve, and the first end of the second electric valve is connected to the second and third ends of the second electric valve, respectively. And / or, when the engine is running, if a heating request is received from the cab controller and / or the battery thermal manager, the third electric valve is controlled to open, including: When the engine is running, if a heating request is received from the cab controller, the first end of the third electric valve is connected to the second end of the third electric valve. If a heating request is received from the battery thermal manager, the first end of the third electric valve is connected to the third end of the third electric valve. If a heating request is received from the cab controller and the battery thermal manager, the first end of the third electric valve is connected to the second and third ends of the third electric valve, respectively.

3. The method according to claim 2, characterized in that, The vehicle thermal management system also includes a radiator; the fourth end of the third electric valve is connected to the radiator. After controlling the first end of the third electric valve to be connected to the second end of the third electric valve, the following is also included: If the temperature in the cab reaches the first preset heating temperature, then the first end of the third electric valve is disconnected from the second end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve. And / or, after controlling the first terminal of the third electric valve to be connected to the third terminal of the third electric valve, the method further includes: If the temperature of the battery pack reaches the second preset heating temperature, then the first end of the third electric valve is disconnected from the third end of the third electric valve, and the first end of the third electric valve is connected to the fourth end of the third electric valve.

4. The method according to claim 1, characterized in that, Also includes: When the engine is not running, if a thermal adjustment request is received from the cab controller and the battery thermal manager, the integrated air conditioner is controlled to perform thermal adjustment, and the first electric valve and the second electric valve are controlled to open; wherein, the thermal adjustment request includes a cooling request and a heating request; If the temperature of the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the integrated air conditioner is controlled to stop operating, and the first electric valve and the second electric valve are controlled to close.

5. The method according to claim 4, characterized in that, Before the temperature in the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the method further includes: If the temperature of the cab reaches the first target temperature and the temperature of the battery pack does not reach the second target temperature, then the connection between the first electric valve and the second electric valve and the cab air conditioner is disconnected. If the temperature of the battery pack reaches the second target temperature and the temperature of the cab does not reach the first target temperature, then the connection between the first electric valve and the second electric valve and the battery pack heat exchanger is disconnected.

6. The method according to claim 5, characterized in that, Before the temperature in the cab reaches the first target temperature and the temperature of the battery pack reaches the second target temperature, the method further includes: If the temperature of the cab reaches the first target temperature or the temperature of the battery pack reaches the second target temperature, the output power of the integrated air conditioner is reduced.

7. A vehicle thermal management system, characterized in that, include: The whole machine controller, integrated air conditioner, battery thermal manager, cab controller, cab air conditioner, first electric valve, second electric valve and third electric valve; The first electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger, respectively; the second electric valve is connected to the integrated air conditioner, the cab air conditioner, and the battery pack heat exchanger, respectively. The overall controller is connected to the first electric valve, the second electric valve, the integrated air conditioner, the battery thermal manager, and the cab controller respectively. When the engine is running, if the overall controller receives a cooling request from the cab controller and / or the battery thermal manager, it controls the integrated air conditioner to perform cooling and controls the first electric valve and the second electric valve to open. The third electric valve is connected to the engine, the cab air conditioner, and the battery pack heat exchanger respectively; the whole machine controller is also connected to the third electric valve, and the whole machine controller is also used to control the third electric valve to open when the engine is running, if it receives a heating request from the cab controller and / or the battery thermal manager, so that the heat generated by the engine can be used to heat the cab or the battery pack through the third electric valve. When the engine is not running, if a cooling request is received from one component of the cab controller and the battery thermal manager and a heating request from another component, the first electric valve and the second electric valve are opened, and the integrated air conditioner is put into heat exchange mode. If the temperature of the cab reaches the third target temperature or the temperature of the battery pack reaches the fourth target temperature, the integrated air conditioner is controlled to cool or heat. If the temperature of the cab reaches the third target temperature and the temperature of the battery pack reaches the fourth target temperature, the integrated air conditioner will be controlled to stop operating, and the first electric valve and the second electric valve will be controlled to shut off.

8. The vehicle thermal management system according to claim 7, characterized in that, It also includes the heat sink; The third electric valve is connected to the radiator.

9. A vehicle, characterized in that, Includes the vehicle thermal management system as described in claim 7 or 8.

Images