Automobile thermal management system, control method and automobile

Abstract

The invention belongs to the technical field of vehicle thermal management, and particularly relates to a vehicle thermal management system, a control method and a vehicle, and the extended-range vehicle thermal management system comprises an air conditioning system, a battery loop, a motor electric drive loop, a multi-way water valve and a front-end heat dissipation group; the air conditioning system comprises a heat exchanger, and the air conditioning system and the battery loop are connected through the heat exchanger; the automobile heat management system selectively conducts heat exchange on the air conditioning system and the battery loop according to the environment temperature, the battery cell temperature and / or the motor electric drive temperature, and selectively conducts heat exchange on the battery loop and the motor electric drive loop through the multi-way water valve. And the temperature of the electric drive cooling liquid in the motor electric drive loop is selectively reduced through the front end heat dissipation set. The problems that an automobile power system is slow in heat dissipation and low in strong cooling capacity are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle thermal management, and in particular relates to an automobile thermal management system, a control method and an automobile. Background Art

[0002] With the development of electric vehicle technology, electric vehicles have begun to present a variety of driving modes that fit the user experience, such as comfortable driving, economic mode, super energy-saving mode, etc., including strong cooling mode. Strong cooling mode usually means higher acceleration and higher vehicle speed, which also brings stronger cooling requirements for the power system.

[0003] In order to meet this stronger cooling demand, the current technology implementation path mainly includes the following aspects: increasing the front-end fan power to increase the front-end air intake and enhance heat dissipation, increasing the motor electric drive water pump and battery water pump power to increase the coolant flow and enhance heat dissipation, increasing the front-end radiator area and number to enhance heat exchange, and increasing the front grille opening area to increase the front-end air intake and enhance heat dissipation.

[0004] However, these methods all have some limitations. First, these improvement measures will significantly increase the cost of the vehicle. Second, increasing the number of radiators will increase the difficulty of vehicle layout. In addition, increasing the opening area of ​​the front grille will not only affect the appearance of the vehicle, but also increase wind resistance, thus affecting the overall performance of the vehicle.

[0005] Therefore, how to effectively solve the heat dissipation problem of the power system while ensuring the performance of electric vehicles, while controlling costs and maintaining the vehicle's aesthetics and aerodynamic performance has become an important challenge in the design of electric vehicle thermal management systems. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an automobile thermal management system, a control method and an automobile, which can solve the problems of slow heat dissipation and low cooling capacity of the automobile power system.

[0007] To achieve the above purpose, the present invention adopts the following technical solution.

[0008] A first aspect of the present invention provides an automotive thermal management system, comprising: Air conditioning system, battery circuit, motor electric drive circuit, multi-way water valve and front-end heat dissipation group; the air conditioning system includes a heat exchanger, and the air conditioning system and the battery circuit are connected via the heat exchanger; the front-end heat dissipation group includes a front-end radiator and a front-end cooling fan, one end of the front-end radiator is connected to an interface of the multi-way water valve, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature, and the coolant temperature in the motor electric drive circuit is the motor electric drive temperature; The automotive thermal management system selectively exchanges heat between the air conditioning system and the battery circuit according to the ambient temperature, the battery core temperature and / or the motor drive temperature, and selectively exchanges heat between the battery circuit and the motor drive circuit through the multi-way water valve, and selectively reduces the electric drive coolant temperature in the motor drive circuit through the front-end heat dissipation group.

[0009] As an optional embodiment, the battery circuit includes a battery water pump and a battery; and / or the motor drive circuit includes a motor water pump and an electric drive electronic control system; and / or the front-end heat dissipation group includes a front-end radiator and a front-end cooling fan.

[0010] As an optional embodiment, the vehicle thermal management system also includes a front-end cooling fan, a one-way valve and / or a shut-off valve, one end of the one-way valve and the shut-off valve are connected to the battery circuit, and the other end is connected to the motor electric drive circuit.

[0011] As an optional implementation manner, the thermal management system starts a pre-cooling mode based on a preset instruction, and the pre-cooling mode includes: When the battery core temperature is greater than the first preset battery core temperature and the motor drive temperature is greater than the first preset motor drive temperature, the precooling mode operates in mode 1; In the described mode 1: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan operates at the maximum duty cycle, the motor water pump and the battery water pump operate at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump, and then flows out through the interfaces d and e of the multi-way water valve and the battery water pump to cool the battery, and the outflowing coolant enters the heat exchanger to exchange heat with the refrigerant in the air conditioning system for recirculation.

[0012] As an optional implementation manner, the thermal management system starts a pre-cooling mode based on a preset instruction, and the pre-cooling mode includes: When the motor drive temperature is greater than the first preset motor drive temperature and the battery core temperature is less than or equal to the first preset battery core temperature, the precooling mode operates in mode 2; In the second mode: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump is running at the maximum duty cycle, the battery water pump is not working, the shut-off valve is open, and the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the one-way valve and the motor water pump, and then flows out into the heat exchanger through the shut-off valve to exchange heat with the refrigerant in the air conditioning system for recirculation.

[0013] As an optional implementation, when the battery core temperature is equal to the first preset battery core temperature and the motor drive temperature is equal to the first preset motor drive temperature, the pre-cooling mode is switched to the strong cooling mode.

[0014] As an optional implementation, the strong cooling mode includes: When the motor drive temperature is less than or equal to the battery core temperature and the battery core temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode three: In the described mode three: the air conditioning system does not work, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump and the battery water pump operate at the maximum duty cycle, the shut-off valve is closed, the battery circuit forms an independent circuit through the battery water pump, the interface a and the interface d of the multi-way water valve to average the battery temperature, and the motor electric drive circuit forms an independent circuit through the motor water pump, the interface b and the interface e of the multi-way water valve to average the motor electric drive temperature.

[0015] As an optional implementation, the strong cooling mode includes: When the battery core temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode 4: In mode four: the air conditioning system does not work, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump and the battery water pump operate at maximum duty cycle, the stop valve is closed, the interfaces a and b of the multi-way water valve are connected, the interfaces d and e are connected, and the motor electric drive circuit operates in series through the multi-way water valve and the battery circuit.

[0016] As an optional implementation, the strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode five: In the described mode five: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan operates at the maximum duty cycle, the motor water pump and the battery water pump operate at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump to cool it, and after flowing out, enters the battery through the interfaces e and d of the multi-way water valve and the battery water pump to cool the battery, and the outflowing coolant enters the heat exchanger to exchange heat with the low-temperature refrigerant for recirculation.

[0017] As an optional implementation, the strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the ambient temperature is less than the motor drive temperature, the strong cooling mode operates in mode six: In mode six: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan runs at the maximum duty cycle, the motor water pump and the battery water pump run at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump to cool it, and after flowing out, enters the battery through the interfaces c and d of the multi-way water valve and the battery water pump to cool the battery, and the high-temperature coolant that flows out enters the heat exchanger to exchange heat with the low-temperature refrigerant and circulates again.

[0018] As an optional implementation, the strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode seven: In the described mode seven: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump and the battery water pump are running at the maximum duty cycle, the stop valve is opened, and the coolant cooled by the air conditioning system is divided into two paths, one path enters the battery through the interface a and interface d of the multi-way water valve and the battery water pump to cool it, and the outflowing coolant enters the heat exchanger, and the motor water pump is connected to the electric drive and electronic control system, the interface b and interface e of the multi-way water valve to form a circulation; one path flows to the electric drive and electronic control system through the one-way valve, and the heated coolant flowing out of the electric drive and electronic control system will also flow to the heat exchanger through the stop valve.

[0019] As an optional implementation, the strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the ambient temperature is less than the motor drive temperature, the strong cooling mode operates in mode eight: In the described mode eight: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan is running at the maximum duty cycle, the motor water pump and the battery water pump are running at the maximum duty cycle, the shut-off valve is opened, and the coolant cooled by the air conditioning system is divided into two paths, one path enters the battery through the interface a and interface d of the multi-way water valve and the battery water pump to cool it, and the outflowing coolant enters the heat exchanger, and the motor water pump is connected to the electric drive and electronic control system, the multi-way water valve interface b and interface c to form a circulation; one path flows to the electric drive and electronic control system through the one-way valve, and the heated coolant flowing out of the electric drive and electronic control system will flow to the heat exchanger through the shut-off valve.

[0020] The second aspect of the present invention provides a thermal management control method for an automobile thermal management system based on the first aspect of the present invention, comprising: an air conditioning system, a battery circuit, a motor electric drive circuit, a multi-way water valve and a front-end heat dissipation group; the air conditioning system comprises a heat exchanger, and the air conditioning system and the battery circuit are connected via the heat exchanger; the front-end heat dissipation group comprises a front-end radiator and a front-end cooling fan, one end of the front-end radiator is connected to an interface of the multi-way water valve, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature, and the coolant temperature in the motor electric drive circuit is the motor electric drive temperature; The automotive thermal management system selectively exchanges heat between the air conditioning system and the battery circuit according to the ambient temperature, the battery core temperature and / or the motor drive temperature, and selectively exchanges heat between the battery circuit and the motor drive circuit through the multi-way water valve, and selectively reduces the electric drive coolant temperature in the motor drive circuit through the front-end heat dissipation group.

[0021] A third aspect of the present invention provides an automobile, comprising the automobile thermal management system as described in the first aspect of the present invention.

[0022] A fourth aspect of the present invention provides an electronic device, comprising: At least one processor; and at least one memory in communication with the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the method described in the second aspect of the present invention.

[0023] A fifth aspect of the present invention provides a readable storage medium storing a computer program, wherein the computer program is executed by a processor to perform the steps of the method described in the second aspect of the present invention.

[0024] In summary, compared with the prior art, the present invention realizes multi-path and multi-mode thermal management by integrating the air-conditioning system, battery circuit, motor drive circuit, multi-way water valve and front-end heat dissipation group. According to the real-time status of ambient temperature, battery core temperature and motor drive temperature, the system can intelligently select the optimal heat exchange path, such as heat exchange between the air-conditioning system and the battery circuit, heat exchange between the battery circuit and the motor drive circuit through the multi-way water valve, and use the front-end heat dissipation group to reduce the temperature of the motor drive circuit. This dynamic adjustment mechanism not only improves the thermal management efficiency of the whole vehicle, but also can accurately meet the temperature requirements of different components under various working conditions, and can effectively cope with various complex environmental conditions and operating conditions. At the same time, this integrated thermal management system can simplify the system structure, optimize energy utilization, extend the service life of key components, and provide strong support for improving the vehicle's endurance and overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A system schematic diagram of an automobile thermal management system in one embodiment of the present invention is shown.

[0027] Figure 2 A cooling logic diagram of an automobile thermal management system in a racing mode according to an embodiment of the present invention is shown.

[0028] Figure 3 A system schematic diagram of an automobile thermal management system operating in mode 1 according to an embodiment of the present invention is shown.

[0029] Figure 4 A system schematic diagram of an automobile thermal management system operating in mode 2 according to an embodiment of the present invention is shown.

[0030] Figure 5 A system schematic diagram of an automobile thermal management system operating in mode three according to an embodiment of the present invention is shown.

[0031] Figure 6 A system schematic diagram of an automobile thermal management system operating in mode 4 according to an embodiment of the present invention is shown.

[0032] Figure 7 A system schematic diagram of an automobile thermal management system operating in mode five according to an embodiment of the present invention is shown.

[0033] Figure 8 A system schematic diagram of an automobile thermal management system operating in mode six according to an embodiment of the present invention is shown.

[0034] Fig. 9 A system schematic diagram of an automobile thermal management system operating in mode seven according to an embodiment of the present invention is shown.

[0035] Fig.10 A system schematic diagram of an automobile thermal management system operating in mode eight according to an embodiment of the present invention is shown.

[0036] Fig.11 FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

[0037] Reference numerals: 1-battery water pump, 2-motor water pump, 3-battery, 4-plate heat exchanger, 5-air conditioning system, 6-check valve, 7-electric component system, 8-charging system, 9-electric drive and electronic control system, 10-front end radiator, 11-front end cooling fan, 12-stop valve, 13-multi-way water valve. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0039] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In addition, in the following embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in one embodiment, reference can be made to the relevant description of other embodiments.

[0040] The battery system of new energy electric vehicles usually adopts refrigerant forced cooling technology, while the electric drive and electronic control system adopts coolant cooling technology. When facing some scenarios such as user racing experience, high-temperature climbing, high-power output and extreme environments, the car will need strong cooling to help the vehicle dissipate heat. Specifically, in racing mode, the vehicle may need to run at high speed continuously or accelerate frequently, causing the power system to generate a lot of heat; when the vehicle climbs for a long time in a high-temperature environment, the power system and battery pack may face a large thermal load; in scenarios that require continuous high-power output, such as long-term high-speed cruising or towing heavy objects, and when the vehicle is running in an extremely high temperature environment, the vehicle system may need additional cooling capacity.

[0041] In view of this, if Figure 1 As shown, the first aspect of the present invention provides an automobile thermal management system, which consists of a battery water pump 1, a motor water pump 2, a battery 3, a heat exchanger 4, an air conditioning system 5, a one-way valve 6, an electrical component system 7, a charging system 8, an electric drive and electronic control system 9, a front-end radiator 10, a front-end cooling fan 11, a stop valve 12, and a multi-way water valve 13, wherein the heat exchanger 4 can be one of the existing heat exchangers such as a plate heat exchanger.

[0042] Specifically, the battery circuit includes a battery water pump 1 and a battery 3; the motor electric drive circuit includes a motor water pump 2 and an electric drive electronic control system 9. In some application scenarios, the motor electric drive circuit also includes an electrical device system 7 and a charging system 8; the front-end heat dissipation group includes a front-end radiator 10 and a front-end cooling fan 11.

[0043] The air conditioning system 5 includes components such as a compressor, a condenser, and an expansion valve, which are not described in detail in the present invention.

[0044] In an application scenario, the air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant, and the low-temperature coolant flowing out of the plate heat exchanger 4 is the coolant cooled by the refrigerant.

[0045] For details, please continue to refer to Figure 1 The multi-way water valve 13 is composed of interface a, interface b, interface c, interface d, and interface e. The remaining interfaces can be connected to other components of the thermal management system and are not described in detail. The interface a is connected to the heat exchanger 4; the interface b is connected to the motor water pump 2; the interface c is connected to the front-end radiator 10; the interface d is connected to the battery water pump 1; the interface e is connected to the intersection pipeline of the front-end heat dissipation group 10 and the motor electric drive circuit, one end of the intersection pipeline is connected to the front-end radiator 10, and the other end is connected to the electric drive and electronic control system 9.

[0046] In the normal driving mode, the stop valve 12 is closed, and the multi-way water valve 13 can realize independent cooling of the battery, independent cooling of the electric drive and electronic control, and series cooling of the battery, electric drive and electronic control by switching modes, which will not be described in detail in the present invention.

[0047] Air conditioning system, battery circuit, motor electric drive circuit, multi-way water valve and front-end radiator; wherein, the air conditioning system 5 includes a heat exchanger 4, and the air conditioning system 5 and the battery circuit are connected via the heat exchanger 4; one end of the front-end radiator 10 in the front-end heat dissipation group is connected to an interface of the multi-way water valve 13, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature T EDS , the coolant temperature in the motor drive circuit is the motor drive temperature T ESS One end of the one-way valve 6 and the stop valve 12 are connected to the battery circuit, and the other end are connected to the motor drive circuit. The automobile thermal management system is based on the ambient temperature Tamb, the motor drive temperature T EDS and / or cell temperature T ESSThe air conditioning system is selectively heat exchanged with the battery circuit, and the battery circuit and the motor drive circuit are selectively heat exchanged through the multi-way water valve, and the motor drive temperature T in the motor drive circuit is selectively reduced through the front-end heat dissipation group. EDS .

[0048] The present invention realizes efficient and dynamic temperature management by flexibly regulating the heat exchange between the air conditioning system, the battery circuit, the motor drive circuit, the multi-way water valve and the front-end heat dissipation group. EDS and cell temperature T ESS , intelligently selects the most suitable heat exchange path, can achieve precise temperature control under different working conditions, improves the energy utilization efficiency of the whole vehicle, and enhances the performance stability and life of each key component.

[0049] like Figure 2 As shown, in one embodiment of the present invention, the thermal management system starts the pre-cooling mode based on a preset instruction.

[0050] Specifically, the preset instructions include active instructions and passive instructions.

[0051] For example, for active commands, when the vehicle senses that the user may need to enter strong cooling mode, such as in a high-temperature climbing scenario, the vehicle navigation system combined with temperature sensors will automatically issue pre-cooling commands to the thermal management system, so that the user can pre-cool the vehicle body before the high-temperature climbing scenario, so as to effectively respond to various high heat load scenarios and ensure that the vehicle can still maintain optimal performance and reliability under extreme conditions.

[0052] Exemplarily, for passive instructions, when the user needs to implement a strong cooling mode, such as a racing mode, the user can issue a preset instruction in advance. When the user starts racing, he can enter the racing mode as soon as possible. Before that, the pre-cooling mode needs to be started as a transition mode to the racing mode.

[0053] For example, in one application scenario, the user sets the racing mode usage time t through the mobile phone APP or the vehicle screen. The vehicle will wake up the vehicle high voltage t1 time in advance based on the ambient temperature Tamb and start the vehicle thermal management precooling mode. Among them, the higher the ambient temperature, the more difficult the precooling is. For example, when Tamb>35℃, t1=60min; when 25℃≤Tamb<35℃, t1=40min; when Tamb<25℃, t1=25min.

[0054] When the thermal management system is running in the pre-cooling mode, combined with the monitored motor drive coolant temperature T EDS and cell temperature T ESS Switch the thermal management system mode.

[0055] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the precooling mode includes: When the battery core temperature is greater than the first preset battery core temperature and the motor drive temperature is greater than the first preset motor drive temperature, the precooling mode operates in mode 1; In the mode 1, the air conditioning system 5 is working, the front radiator 10 is bypassed, the front cooling fan 11 is running at the maximum duty cycle, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is closed. The interface a of the multi-way water valve 13 is connected to the interface b, and the interface d is connected to the interface e. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant flows into the electrical device system 7, the charging system 8, and the electric drive and control system 9 in sequence through the interfaces a and b of the multi-way water valve 13 and the motor water pump 2 and cools them. After flowing out, it enters the battery 3 through the interfaces e and d of the multi-way water valve 13 and the battery water pump 1 to cool the battery. The high-temperature coolant flows into the plate heat exchanger 4 to exchange heat with the low-temperature refrigerant and circulates again. At this time, the front radiator 10 is bypassed to prevent the low-temperature coolant from absorbing heat from the environment to heat the motor drive and the battery.

[0056] Specifically, according to actual experience, the motor drive temperature is generally lower than the battery core temperature. In the present invention, the first preset motor drive temperature corresponds to being lower than the first preset battery core temperature. Exemplarily, the first preset motor drive temperature may be 6°C, and the first preset battery core temperature may be 13°C.

[0057] Furthermore, when the outlet pressure of the one-way valve 6 is lower than the inlet pressure, it is in the open state and connected in parallel with the interfaces a and b of the multi-way water valve 13; when the outlet pressure of the one-way valve 6 is higher than the inlet pressure, it is in the closed state.

[0058] like Figure 2 and Figure 4 As shown, in one embodiment of the present invention, the precooling mode further includes: When the motor drive temperature is greater than the first preset motor drive temperature and the battery core temperature is less than or equal to the first preset battery core temperature, the precooling mode operates in mode 2; In the second mode: the air conditioning system is working, the front radiator is bypassed, the front cooling fan is running at the maximum duty cycle, the motor water pump 2 is running at the maximum duty cycle, the battery water pump 1 is not working, and the stop valve 12 is opened. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant flows into the electrical device system 7, the charging system 8, and the electric drive and control system 9 in sequence through the one-way valve 6 and the motor water pump 2 and cools them. The high-temperature coolant flows out through the second stop valve 12 into the plate heat exchanger 4 to exchange heat with the low-temperature refrigerant and circulates again.

[0059] Here, through mode 1, the battery and the electric drive and electronic control system are cooled synchronously, and unnecessary heat absorption is avoided by bypassing the front radiator. Through mode 2, the electric drive system is cooled centrally to improve the cooling efficiency. By flexibly switching between these two modes, the present invention can optimize the allocation of cooling resources according to the real-time temperature requirements of different components and effectively improve the pre-cooling efficiency.

[0060] In one embodiment of the present invention, when the battery core temperature is equal to the first preset battery core temperature and the motor drive temperature is equal to the first preset motor drive temperature, the pre-cooling mode is switched to the strong cooling mode.

[0061] As a supplementary scenario, for example, in racing mode, when the user gets on the car as scheduled and enables the racing mode, the battery cell temperature is equal to the first preset battery cell temperature and the motor electric drive temperature is equal to the first preset motor electric drive temperature, the pre-cooling mode is switched to the strong cooling mode; if the user does not get on the car as scheduled to enable the racing mode, and the motor electric drive temperature exceeds a reasonable preset motor electric drive temperature, such as 9°C or the battery cell temperature exceeds a reasonable preset battery cell temperature, such as 18°C, it is switched back to the pre-cooling mode.

[0062] like Figure 2 and Figure 5 As shown, in one embodiment of the present invention, the strong cooling mode includes: When the motor drive temperature is less than or equal to the battery core temperature and the battery core temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, that is, T EDS ≤T ESS <First preset temperature and T EDS When <Tamb, for example, the first preset temperature may be 20°C, the strong cooling mode operates in mode 3: In the described mode three: the air conditioning system is not working, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is closed. The multi-way water valve 13 interface a is connected to the interface d, and the interface b is connected to the interface e. The battery circuit forms an independent circuit through the battery water pump 1, the multi-way water valve 13 interface a and the interface d to equalize the battery temperature. The motor drive circuit forms an independent circuit through the motor water pump 2, the multi-way water valve 13 interface b and the interface e to equalize the motor drive temperature. At this time, the front-end radiator 10 is bypassed to prevent the low-temperature coolant from absorbing heat from the environment to heat the motor drive and the battery. Among them, when the outlet pressure of the one-way valve 6 is less than the inlet pressure, it is in an open state, and a part of the coolant flowing out of the plate heat exchanger 4 will enter the motor drive cooling system through the one-way valve 6, and finally form a flow balance; when the outlet pressure of the one-way valve 6 is greater than the inlet pressure, it is in a closed state.

[0063] like Figure 2 and Figure 6 As shown, in one embodiment of the present invention, the strong cooling mode includes: When the battery core temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, that is, T ESS ≤T EDS <First preset temperature and T EDS <Tamb, the strong cooling mode runs in mode four: In mode four: the air conditioning system does not work, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump 2 and the battery water pump 1 run at the maximum duty cycle, and the stop valve 12 is closed. The interface a of the multi-way water valve 13 is connected to the interface b, and the interface d is connected to the interface e. At this time, the motor drive coolant temperature is higher than the battery temperature, and it can be operated in series through the multi-way water valve 13. At this time, the front-end radiator 10 is bypassed to prevent the low-temperature coolant from absorbing heat from the environment to heat the motor drive and the battery. Among them, when the outlet pressure of the one-way valve 6 is less than the inlet pressure, it is in an open state, in parallel with the interface a and interface b of the multi-way water valve 13; when the outlet pressure of the one-way valve 6 is greater than the inlet pressure, it is in a closed state.

[0064] like Figure 2 and Figure 7 As shown, in one embodiment of the present invention, the strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the motor drive temperature is less than the ambient temperature, the first preset temperature ≤ T EDS <Second preset temperature and T EDS When <Tamb, for example, the first preset temperature may be 20°C, the second preset temperature may be 30°C, and the strong cooling mode operates in mode 5: In the mode 5: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is closed. The interface a of the multi-way water valve 13 is connected to the interface b, and the interface d is connected to the interface e. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant flows into the electrical device system 7, the charging system 8, and the electric drive and control system 9 in sequence through the interfaces a and b of the multi-way water valve 13 and the motor water pump 2 and cools them. After flowing out, it enters the battery 3 through the interfaces e, d, and the battery water pump 1 of the multi-way water valve 13 to cool the battery. The high-temperature coolant flows into the plate heat exchanger 4 to exchange heat with the low-temperature refrigerant and circulates again. At this time, the front-end radiator 10 is bypassed to prevent the low-temperature coolant from absorbing heat from the environment to heat the motor drive and the battery. Among them, when the outlet pressure of the one-way valve 6 is less than the inlet pressure, it is in the open state and is connected in parallel with the interface a and the interface b of the multi-way water valve 13; when the outlet pressure of the one-way valve 6 is greater than the inlet pressure, it is in the closed state.

[0065] like Figure 2 and Figure 8 As shown, in one embodiment of the present invention, the strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the ambient temperature is less than the motor drive temperature, the first preset temperature ≤ T EDS < the second preset temperature and Tamb < T EDS When the strong cooling mode is operated in mode 6: In the described mode six: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan is running at the maximum duty cycle, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is closed. The interface a of the multi-way water valve 13 is connected to the interface b, and the interface c is connected to the interface d. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant flows into the electrical device system 7, the charging system 8, and the electric drive and control system 9 in sequence through the interfaces a and b of the multi-way water valve 13 and the motor water pump 2 and cools them. After flowing out, it enters the battery 3 through the interfaces c and d of the multi-way water valve 13 and the battery water pump 1 to cool the battery. The high-temperature coolant that flows out enters the plate heat exchanger 4 to exchange heat with the low-temperature refrigerant and circulates again. At this time, the front-end radiator 10 is connected so that the coolant can dissipate heat to the environment. Among them, when the outlet pressure of the one-way valve 6 is less than the inlet pressure, it is in the open state and is connected in parallel with the interface a and the interface b of the multi-way water valve 13; when the outlet pressure of the one-way valve 6 is greater than the inlet pressure, it is in the closed state.

[0066] like Figure 2 and Fig. 9As shown, in one embodiment of the present invention, the strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the ambient temperature, the second preset temperature ≤ T EDS When <Tamb, the strong cooling mode operates in mode seven: In the mode seven: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is opened. The multi-way water valve 13 interface a is connected to the interface d, and the interface b is connected to the interface e. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant is divided into two paths. One path passes through the multi-way water valve 13 interface a and interface d, and the battery water pump 1 to enter the battery 3 to cool it, and the coolant that flows out after being heated by the battery enters the plate heat exchanger 4. The motor water pump 2 will be connected to the electric drive and control system, the multi-way water valve 13 interface b and the interface e to form a circulation system. A portion of the low-temperature coolant cooled by the refrigerant flowing out of the plate heat exchanger 4 will be diverted through the one-way valve 6 to the electric drive and electronic control system to further reduce the coolant temperature of the electric drive and electronic control system, thereby enhancing cooling. Similarly, a portion of the heated coolant flowing out of the electric drive and electronic control system will be diverted through the stop valve 12 to the inlet of the plate heat exchanger 4. At this time, the front radiator 10 is bypassed to prevent the low-temperature coolant from absorbing heat from the environment to heat the motor drive and battery.

[0067] like Figure 2 and Fig.10 As shown, in one embodiment of the present invention, the strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the ambient temperature is less than the motor drive temperature, the second preset temperature ≤ T EDS And Tamb<T EDS When the strong cooling mode is operated in mode eight: In the described mode eight: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan is running at the maximum duty cycle, the motor water pump 2 and the battery water pump 1 are running at the maximum duty cycle, and the stop valve 12 is opened. The multi-way water valve 13 interface a is connected to the interface d, and the interface b is connected to the interface c. The air conditioning system 5 passes the cooled low-temperature refrigerant through the plate heat exchanger 4 and cools it with its coolant. The cooled low-temperature coolant is divided into two paths. One path passes through the multi-way water valve 13 interface a and interface d, and the battery water pump 1 to enter the battery 3 to cool it, and the coolant that flows out after being heated by the battery enters the plate heat exchanger 4. The motor water pump 2 will be connected to the electric drive and control system, the multi-way water valve 13 interface b and the interface c to form a circulation system. A portion of the low-temperature coolant cooled by the refrigerant flowing out of the plate heat exchanger 4 will be separated and flowed to the electric drive and electronic control system through the one-way valve 6 to further reduce the coolant temperature of the electric drive and electronic control system, thereby strengthening the cooling. Similarly, a portion of the heated coolant flowing out of the electric drive and electronic control system will be separated and flowed to the inlet of the plate heat exchanger 4 through the stop valve 12. At this time, the front end radiator 10 is connected, so that the coolant can dissipate heat to the environment.

[0068] The present invention proposes a method of using the air-conditioning system to simultaneously realize forced cooling of the battery and the electric drive and electronic control, and proposes a pre-cooling strategy and a control strategy corresponding to different temperatures, which not only reduces the cost of the entire vehicle, but also can extend the use time of the racing mode through the pre-cooling strategy.

[0069] The present invention can flexibly adjust the cooling strategy according to different combinations of battery core temperature, motor drive temperature and ambient temperature by finely dividing eight different operating modes, and realizes precise control of the air-conditioning system, front-end radiator, cooling fan, water pump and various valves, so that the system can provide the best cooling effect under various complex working conditions. For example, in a low-temperature environment, unnecessary heat loss can be avoided by bypassing the front-end radiator, while in a high-temperature environment, the synergistic effect of the air-conditioning system and the front-end radiator can be fully utilized. Through the flexible combination of the battery circuit and the motor drive circuit, the system can achieve independent cooling or series cooling to meet the temperature requirements of different components. This highly intelligent and personalized cooling strategy not only significantly improves the thermal management efficiency of the whole vehicle, but also effectively extends the service life of key components and improves the performance of the vehicle under extreme conditions. At the same time, this refined temperature control also helps to optimize energy utilization, improve the overall efficiency and endurance of the vehicle, and enhance user experience.

[0070] A second aspect of the present invention provides a thermal management control method for an automobile thermal management system based on the first aspect of the present invention, comprising: Air conditioning system, battery circuit, motor electric drive circuit, multi-way water valve and front-end heat dissipation group; wherein, the air conditioning system includes a heat exchanger, and the air conditioning system and the battery circuit are connected via the heat exchanger; one end of the front-end heat dissipation group is connected to an interface of the multi-way water valve, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature, and the coolant temperature in the motor electric drive circuit is the electric drive temperature; The automotive thermal management system selectively exchanges heat between the air conditioning system and the battery circuit according to the ambient temperature, the battery core temperature and / or the motor drive temperature, and selectively exchanges heat between the battery circuit and the motor drive circuit through the multi-way water valve, and selectively reduces the electric drive coolant temperature in the motor drive circuit through the front-end heat dissipation group.

[0071] A third aspect of the present invention provides an automobile, comprising the automobile thermal management system described in any one of the above embodiments.

[0072] like Fig.11 As shown, the fourth aspect of the present invention provides an electronic device, including: At least one processor; and at least one memory in communication with the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the method described in any one of the above embodiments.

[0073] A fifth aspect of the present invention discloses a readable storage medium storing a computer program, wherein the computer program is executed by a processor to perform the steps of the method described in any one of the above embodiments.

[0074] Computer-readable storage media may include: any entity or device capable of carrying a computer program, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium, etc. A computer program includes a computer program code. The computer program code may be in source code form, object code form, an executable file, or some intermediate form, etc. A computer-readable storage medium may include: any entity or device capable of carrying a computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium, etc.

[0075] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0076] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. An automotive thermal management system, characterized in that: include: Air conditioning system, battery circuit, motor electric drive circuit, multi-way water valve and front-end heat dissipation group; the air conditioning system includes a heat exchanger, and the air conditioning system and the battery circuit are connected via the heat exchanger; the front-end heat dissipation group includes a front-end radiator and a front-end cooling fan, one end of the front-end radiator is connected to an interface of the multi-way water valve, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature, and the coolant temperature in the motor electric drive circuit is the motor electric drive temperature; The automotive thermal management system selectively exchanges heat between the air conditioning system and the battery circuit according to the ambient temperature, the battery core temperature and / or the motor drive temperature, and selectively exchanges heat between the battery circuit and the motor drive circuit through the multi-way water valve, and selectively reduces the electric drive coolant temperature in the motor drive circuit through the front-end heat dissipation group.

2. The automotive thermal management system according to claim 1, characterized in that: The battery circuit includes a battery water pump and a battery; and / or the motor electric drive circuit includes a motor water pump and an electric drive and electronic control system.

3. The automotive thermal management system according to claim 2, characterized in that: It also includes a one-way valve and / or a stop valve, one end of the one-way valve and the stop valve are connected to the battery circuit, and the other end is connected to the motor electric drive circuit.

4. The automotive thermal management system according to claim 3, characterized in that: The thermal management system starts a pre-cooling mode based on a preset instruction, and the pre-cooling mode includes: When the battery core temperature is greater than the first preset battery core temperature and the motor drive temperature is greater than the first preset motor drive temperature, the precooling mode operates in mode 1; In the described mode 1: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan operates at the maximum duty cycle, the motor water pump and the battery water pump operate at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump, and then flows out through the interfaces d and e of the multi-way water valve and the battery water pump to cool the battery, and the outflowing coolant enters the heat exchanger to exchange heat with the refrigerant in the air conditioning system for recirculation.

5. The automotive thermal management system according to claim 3, characterized in that: The thermal management system starts a pre-cooling mode based on a preset instruction, and the pre-cooling mode includes: When the battery core temperature is not greater than the first preset battery core temperature and the motor drive temperature is greater than the first preset motor drive temperature, the precooling mode operates in mode 2; In the second mode: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump is running at the maximum duty cycle, the battery water pump is not working, the shut-off valve is open, and the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the one-way valve and the motor water pump, and then flows out into the heat exchanger through the shut-off valve to exchange heat with the refrigerant in the air conditioning system for recirculation.

6. The automotive thermal management system according to claim 4 or 5, characterized in that: When the battery core temperature is equal to the first preset battery core temperature and the motor drive temperature is equal to the first preset motor drive temperature, the pre-cooling mode is switched to the strong cooling mode.

7. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the motor drive temperature is less than or equal to the battery core temperature and the battery core temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode three: In the described mode three: the air conditioning system does not work, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump and the battery water pump operate at the maximum duty cycle, the shut-off valve is closed, the battery circuit forms an independent circuit through the battery water pump, the interface a and the interface d of the multi-way water valve to average the battery temperature, and the motor electric drive circuit forms an independent circuit through the motor water pump, the interface b and the interface e of the multi-way water valve to average the motor electric drive temperature.

8. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the battery core temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the first preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode 4: In mode four: the air conditioning system does not work, the front-end radiator is bypassed, the front-end cooling fan is turned off, the motor water pump and the battery water pump operate at maximum duty cycle, the stop valve is closed, the interfaces a and b of the multi-way water valve are connected, the interfaces d and e are connected, and the motor electric drive circuit operates in series through the multi-way water valve and the battery circuit.

9. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode five: In the described mode five: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan operates at the maximum duty cycle, the motor water pump and the battery water pump operate at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump to cool it, and after flowing out, enters the battery through the interfaces e and d of the multi-way water valve and the battery water pump to cool the battery, and the outflowing coolant enters the heat exchanger to exchange heat with the low-temperature refrigerant for recirculation.

10. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the first preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the second preset temperature and the ambient temperature is less than the motor drive temperature, the strong cooling mode operates in mode six: In mode six: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan runs at the maximum duty cycle, the motor water pump and the battery water pump run at the maximum duty cycle, the coolant cooled by the air conditioning system flows into the electric drive and electronic control system through the interfaces a and b of the multi-way water valve and the motor water pump to cool it, and after flowing out, enters the battery through the interfaces c and d of the multi-way water valve and the battery water pump to cool the battery, and the high-temperature coolant that flows out enters the heat exchanger to exchange heat with the low-temperature refrigerant and circulates again.

11. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the motor drive temperature is less than the ambient temperature, the strong cooling mode operates in mode seven: In the described mode seven: the air conditioning system is working, the front-end radiator is bypassed, the front-end cooling fan is running at the maximum duty cycle, the motor water pump and the battery water pump are running at the maximum duty cycle, the stop valve is opened, and the coolant cooled by the air conditioning system is divided into two paths, one path enters the battery through the interface a and interface d of the multi-way water valve and the battery water pump to cool it, and the outflowing coolant enters the heat exchanger, and the motor water pump is connected to the electric drive and electronic control system, the interface b and interface e of the multi-way water valve to form a circulation; one path flows to the electric drive and electronic control system through the one-way valve, and the heated coolant flowing out of the electric drive and electronic control system will also flow to the heat exchanger through the stop valve.

12. The automotive thermal management system according to claim 6, characterized in that: The strong cooling mode includes: When the second preset temperature is less than or equal to the motor drive temperature and the ambient temperature is less than the motor drive temperature, the strong cooling mode operates in mode eight: In the described mode eight: the air conditioning system is working, the front-end radiator is connected, the front-end cooling fan is running at the maximum duty cycle, the motor water pump and the battery water pump are running at the maximum duty cycle, the shut-off valve is opened, and the coolant cooled by the air conditioning system is divided into two paths, one path enters the battery through the interface a and interface d of the multi-way water valve and the battery water pump to cool it, and the outflowing coolant enters the heat exchanger, and the motor water pump is connected to the electric drive and electronic control system, the multi-way water valve interface b and interface c to form a circulation; one path flows to the electric drive and electronic control system through the one-way valve, and the heated coolant flowing out of the electric drive and electronic control system will flow to the heat exchanger through the shut-off valve.

13. A thermal management control method based on the automotive thermal management system according to claim 1, characterized in that: include: Air conditioning system, battery circuit, motor electric drive circuit, multi-way water valve and front-end heat dissipation group; the air conditioning system includes a heat exchanger, and the air conditioning system and the battery circuit are connected via the heat exchanger; the front-end heat dissipation group includes a front-end radiator and a front-end cooling fan, one end of the front-end radiator is connected to an interface of the multi-way water valve, and the other end is connected to the motor electric drive circuit; the coolant temperature in the battery circuit is the battery core temperature, and the coolant temperature in the motor electric drive circuit is the motor electric drive temperature; The automotive thermal management system selectively exchanges heat between the air conditioning system and the battery circuit according to the ambient temperature, the battery core temperature and / or the motor drive temperature, and selectively exchanges heat between the battery circuit and the motor drive circuit through the multi-way water valve, and selectively reduces the electric drive coolant temperature in the motor drive circuit through the front-end heat dissipation group.

14. An automobile, comprising the automobile thermal management system according to any one of claims 1 to 12.

15. An electronic device, characterized in that: include: at least one processor; and at least one memory communicatively connected to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the steps of the thermal management control method as claimed in claim 13.

16. A readable storage medium storing a computer program, characterized in that: The computer program is used by a processor to execute the steps of the thermal management control method as claimed in claim 13 .

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