Thermal management system and vehicle

Abstract

The invention discloses a heat management system and a vehicle. The heat management system comprises an air conditioning box, a motor electric-drive heat dissipation part, a compressor, an electric heater, a heat management integrated module and a controller. The heat management integration module comprises a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump and a second water pump; the heat management system has a first working mode, and in the first working mode, the controller controls the compressor, the first water pump and the second water pump to be started, controls a first valve port and a second valve port of the first valve to be communicated, controls a first valve port and a second valve port of the third valve to be communicated, and controls the third valve port to be communicated with a fourth valve port; the first valve port and the second valve port of the second valve are controlled to be communicated, the electric heater is controlled to heat according to the actual environment temperature and the target temperature, the air conditioner box can achieve the heating function through heat of the heat pump circulation loop and the motor electric drive system, and electric energy consumed by heat management of the battery module can be reduced; therefore, the endurance time of the vehicle can be prolonged.

Description

Technical Field

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

[0002] As vehicle requirements for energy consumption, environmental protection, etc. continue to increase, electrification has gradually become a development trend for commercial vehicles. For example, light trucks use power batteries as energy sources, and have developed rapidly due to their good energy-saving effects and low operating costs.

[0003] In low temperature environments in winter, battery performance will be significantly reduced, and continuous heating is required to maintain the operating temperature. The cockpit also needs to be heated to ensure the driver's thermal comfort. As a result, the thermal management of the cockpit and battery will cause non-power energy consumption to account for too high a proportion of the total power, reducing the vehicle's endurance. Summary of the Invention

[0004] The present invention provides a thermal management system and a vehicle to solve the problem of short vehicle driving time at low ambient temperatures.

[0005] According to one aspect of the present invention, a thermal management system is provided for use in a vehicle, comprising: an air conditioning box, a motor electric drive heat sink, a compressor, an electric heater, a thermal management integrated module, and a controller;

[0006] The thermal management integrated module includes a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump and a second water pump;

[0007] The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor, the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the compressor;

[0008] The coolant inlet of the condenser is connected to the first valve port of the third valve, and the coolant outlet of the condenser is connected to the first valve port of the first valve; the second valve port of the first valve is connected to the coolant inlet of the first water pump, and the coolant outlet of the first water pump is connected to the coolant inlet of the air-conditioning box, and the coolant outlet of the air-conditioning box is connected to the second valve port of the third valve, and the electric heater is provided on the flow path between the first water pump and the coolant inlet of the air-conditioning box;

[0009] The coolant inlet of the evaporator is connected to the first valve port of the second valve, the coolant outlet of the evaporator is connected to the third valve port of the third valve, the fourth valve port of the third valve is connected to the coolant inlet of the second water pump, the coolant outlet of the second water pump is connected to the coolant inlet of the motor electric drive heat dissipation unit, and the coolant outlet of the motor electric drive heat dissipation unit is connected to the third valve port of the second valve;

[0010] The thermal management system has a first operating mode. In the first operating mode, the controller controls the start-up of the compressor, the first water pump and the second water pump, controls the communication between the first valve port and the second valve port of the first valve, controls the communication between the first valve port and the second valve port of the third valve, and the communication between the third valve port and the fourth valve port, controls the communication between the first valve port and the second valve port of the second valve, and controls the heating of the electric heater according to the actual ambient temperature and the target temperature.

[0011] Optionally, the thermal management system further includes: a battery heat dissipation unit; the thermal management integrated module further includes: a third water pump;

[0012] The coolant inlet of the third water pump is connected to the fifth valve port of the third valve, the coolant outlet of the third water pump is connected to the coolant inlet of the battery heat dissipation unit, the coolant inlet of the battery heat dissipation unit is connected to the third valve port of the second valve, and the fourth valve port of the second valve is connected to the sixth valve port of the third valve;

[0013] In the first working mode, the controller further controls the start-up of the third water pump, controls the third valve port and the fourth valve port of the second valve to be connected, and controls the fifth valve port and the sixth valve port of the third valve to be connected.

[0014] Optionally, the thermal management system further includes: a first electronic expansion valve;

[0015] The refrigerant inlet of the air-conditioning box is connected to the refrigerant outlet of the condenser, and the refrigerant outlet of the air-conditioning box is connected to the refrigerant inlet of the compressor through the first electronic expansion valve;

[0016] In the first working mode, the controller further controls the first electronic expansion valve to open or close according to air humidity.

[0017] Optionally, the coolant inlet of the third water pump is further connected to the seventh valve port of the third valve;

[0018] The thermal management system also has a second operating mode. In the second operating mode, the controller controls the first water pump to stop, controls the compressor and the third water pump to start, controls the first electronic expansion valve to open, controls the third valve port and the seventh valve port of the third valve to be connected, and controls the first valve port and the third valve port of the second valve to be connected.

[0019] Optionally, the third valve port of the first valve is connected to the coolant inlet of the second water pump, and the coolant inlet of the condenser is further connected to the fifth valve port of the second valve;

[0020] In the second working mode, the controller further controls the start-up of the second water pump, controls the communication between the first valve port and the third valve port of the first valve, and controls the communication between the second valve port and the fifth valve port of the second valve.

[0021] Optionally, the coolant inlet of the third water pump is further connected to the seventh valve port of the third valve;

[0022] The thermal management system further has a third operating mode. In the third operating mode, the controller controls the compressor, the first water pump, and the third water pump to start, controls the first valve port of the first valve to be connected to the second valve port, controls the third valve port of the third valve to be connected to the seventh valve port, controls the first valve to be connected to the second valve, and controls the third valve port of the second valve to be connected to the first valve port.

[0023] Furthermore, the controller controls the first electronic expansion valve to open or close according to the air humidity, and controls the electric heater to heat according to the actual ambient temperature and the target temperature.

[0024] Optionally, the coolant inlet of the condenser is further connected to the fifth valve port of the second valve;

[0025] The thermal management system further has a fourth operating mode. In the fourth operating mode, the controller controls the compressor, the first water pump, the second water pump, and the third water pump to start, controls the second valve port of the third valve to be connected to the fifth valve port, and the third valve port to be connected to the fourth valve port, and controls the first valve port and the second valve port of the second valve to be connected to the fifth valve port, and the fifth valve port to be connected to the third valve port;

[0026] Furthermore, the controller controls the first electronic expansion valve to open or close according to the air humidity, and controls the electric heater to heat according to the actual ambient temperature and the target temperature.

[0027] Optionally, the thermal management integrated module further includes: a liquid replenishing tank and a second electronic expansion valve; the liquid replenishing pipe and the second electronic expansion valve are sequentially arranged between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator;

[0028] The air-conditioning box includes an air-conditioning warm core and an air-conditioning evaporator; the coolant inlet of the air-conditioning warm core is connected to the coolant outlet of the first water pump, and the coolant outlet of the air-conditioning warm core is connected to the second valve port of the third valve; the refrigerant inlet of the air-conditioning evaporator is connected to the refrigerant outlet of the condenser through the first electronic expansion valve, and the refrigerant outlet of the air-conditioning evaporator is connected to the refrigerant inlet of the compressor.

[0029] Optionally, the coolant channels of the thermal management module do not overlap with each other.

[0030] According to another aspect of the present invention, a vehicle is provided, comprising: a motor and electric drive system, a battery module, and the above-mentioned thermal management system.

[0031] A thermal management system provided in an embodiment of the present invention integrates a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump, and a second water pump into a thermal management integrated module. This allows for integration of multiple valves and water pumps, simplifying the design of thermal management flow paths. A heat pump circulation system can be formed by connecting a compressor to the air conditioning unit via the thermal management integrated module. A heat dissipation circulation loop for the electric motor drive can be formed by connecting a heat dissipation unit of the electric motor drive to the thermal management integrated module. Furthermore, the heat pump circulation system and the heat dissipation loop of the heat dissipation unit of the electric motor drive system can intersect. When the thermal management system is in a first operating mode, by controlling the activation of the compressor, the first water pump, and the second water pump, controlling the connectivity of the valve ports of the first valve, the second valve, and the third valve, and controlling the heating of the electric heater based on the actual ambient temperature and the target temperature, the heat pump circulation loop can be used to heat the air conditioning unit. Heat from the electric motor drive system can also be transferred to the heat pump circulation loop to improve the heating efficiency of the air conditioning unit, thereby reducing the energy consumed by the battery module due to thermal management and thus extending the vehicle's cruising range.

[0032] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 This is a schematic structural diagram of a thermal management system provided by an embodiment of the present invention;

[0035] Figure 2 is a system control diagram of a thermal management system provided by an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of another thermal management system provided by an embodiment of the present invention;

[0037] Figure 4 This is a system control diagram of another thermal management system provided by an embodiment of the present invention.

[0038] Figure 5 This is a schematic structural diagram of another thermal management system provided by an embodiment of the present invention;

[0039] Figure 6 This is a schematic structural diagram of another thermal management system provided by an embodiment of the present invention;

[0040] Figure 7 is a schematic diagram of a thermal management system in a third state provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic diagram of a thermal management system in a fourth state provided by an embodiment of the present invention;

[0042] Figure 9 It is a structural schematic diagram of a thermal management module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] Figure 1 is a schematic structural diagram of a thermal management system provided by an embodiment of the present invention. Figure 2 This is a system control diagram of a thermal management system provided by an embodiment of the present invention, combined with reference to Figure 1 and Figure 2The thermal management system 100 is applied to a vehicle and includes: an air-conditioning box 10, a motor electric drive heat dissipation unit 20, a compressor M, an electric heater PTC, a thermal management integrated module 30 and a controller 40; the thermal management integrated module 30 includes a condenser 31, an evaporator 32, a first valve V1, a second valve V2, a third valve V3, a first water pump P1 and a second water pump P2; the refrigerant inlet a1 of the condenser 31 is connected to the refrigerant outlet of the compressor M, the refrigerant outlet a2 of the condenser 31 is connected to the refrigerant inlet b1 of the evaporator 32, and the refrigerant outlet b3 of the evaporator 32 is connected to the refrigerant outlet b4 of the evaporator 32. 2 is connected to the refrigerant inlet of the compressor M; the coolant inlet a3 of the condenser 31 is connected to the first valve port e1 of the third valve V3, and the coolant outlet a4 of the condenser 31 is connected to the first valve port c1 of the first valve V1; the second valve port c2 of the first valve V1 is connected to the coolant inlet of the first water pump P1, the coolant outlet of the first water pump P1 is connected to the coolant inlet f1 of the air conditioning box 10, and the coolant outlet f2 of the air conditioning box 10 is connected to the second valve port e2 of the third valve V3, and the electric heater PTC is set On the flow path between the first water pump P1 and the coolant inlet f1 of the air conditioning box 10; the coolant inlet b3 of the evaporator 32 is connected to the first valve port d1 of the second valve V2, the coolant outlet b4 of the evaporator 312 is connected to the third valve port e3 of the third valve V3, the fourth valve port e4 of the third valve V3 is connected to the coolant inlet of the second water pump P2, the coolant outlet of the second water pump P2 is connected to the coolant inlet g1 of the motor electric drive heat dissipation part 20, and the coolant outlet g2 of the motor electric drive heat dissipation part 20 is connected to the third valve port e3 of the second valve V2. The valve port d3 is connected; the thermal management system 100 has a first working mode. In the first working mode, the controller 40 controls the start-up of the compressor M, the first water pump P1 and the second water pump P2, controls the first valve port c1 and the second valve port c2 of the first valve V1 to be connected, controls the first valve port e1 and the second valve port e2 of the third valve V3 to be connected, and controls the third valve port e3 and the fourth valve port e4 to be connected, controls the first valve port d1 and the second valve port d2 of the second valve V2 to be connected, and controls the electric heater PTC heating according to the actual ambient temperature and the target temperature.

[0046] Specifically, the condenser 31, the evaporator 32, the first valve V1, the second valve V2, the third valve V3, the first water pump P1, and the second water pump P2 can be centrally arranged in the thermal management integrated module 30, so that multiple valves and water pumps are integrated, which can effectively reduce the setting of pipelines (i.e., coolant flow channels), which is conducive to simplifying the design of thermal management channels and improving space utilization. By setting the refrigerant inlet a1 of the condenser 31 to be connected to the refrigerant outlet of the compressor M, the refrigerant outlet a2 of the condenser 31 to be connected to the refrigerant inlet b1 of the evaporator 32, and the refrigerant outlet b2 of the evaporator 32 to the refrigerant inlet of the compressor M, the refrigerant can be sequentially converted through the compressor M, the condenser 31, and the evaporator 32 when the compressor M is running, thereby realizing a heat pump cycle. In addition, the coolant pipeline of the condenser 31 is connected to the coolant pipeline of the air conditioning box 10 through the first valve V1, the third valve V3, and the first water pump P1, so that the coolant in the heat pump cycle can pass through the air conditioning box 10 to realize the corresponding heating function. Furthermore, the coolant pipeline of the evaporator 32 is connected to the motor drive heat dissipation part 20 through the second valve V2 and the second water pump, so that the coolant passing through the motor drive heat dissipation part 20 can enter the evaporator 32 for heat exchange.

[0047] The controller 40 is electrically connected to the compressor M, the first water pump P1, the second water pump P2, the first valve V1, the second valve V2 and the third valve V3, respectively, and is used to control the states of the compressor M, the first water pump P1, the second water pump P2, the first valve V1, the second valve V2 and the third valve V3, respectively.

[0048] For example, the thermal management system 100 has a first working mode, which can be a working mode for heating the cockpit with a heat pump in a low temperature environment, and auxiliary heating with electric drive waste heat and air source heat. In the first working mode, the controller 40 controls the compressor M to start, then refer to Figure 1 The refrigerant circulation loop shown in blue in the heat pump circulation loop is converted from a low-temperature, low-pressure gas to a high-temperature, high-pressure gas by compression of the compressor M. The refrigerant then dissipates heat and is converted to a high-temperature, low-pressure liquid by passing through the condenser 31. The refrigerant then absorbs heat and evaporates in the evaporator 32 to be converted to a low-temperature, low-pressure gas, and finally returns to the compressor M for compression again. On this basis, the controller 40 controls the first water pump P1 to start, controls the first valve port c1 and the second valve port c2 of the first valve V1 to be connected, and controls the first valve port e1 and the second valve port e2 of the third valve V3 to be connected. Figure 1The coolant circulation loop shown in green in the figure can transport the coolant after absorbing heat from the condenser 31 through the first water pump P1 to the air-conditioning box 10 through the first valve V1, so that the air-conditioning box 10 can achieve the heating function through the high-temperature coolant. The coolant after heat exchange in the air-conditioning box 10 returns to the condenser 31 through the second valve port e2 and the first valve port e1 of the third valve V3, and absorbs heat again in the condenser 31, so that the coolant transported to the air-conditioning box 10 is continuously kept at a high temperature, realizing the continuous heating function of the heat pump circulation loop, so as to increase the cabin temperature. At the same time, the controller 40 also controls the start-up of the second water pump P2, and controls the first valve port d1 and the second valve port d2 of the second valve V2 to be connected, and controls the third valve V3 so that the third valve port e3 is connected to the fourth valve port e4, then refer to Figure 1 The coolant circulation loop shown in red can use the second water pump P2 to transport the coolant after dissipating heat in the evaporator 32 through the third valve port e3 and the fourth valve port e4 of the third valve V3 to the motor drive heat dissipation part 20, so that the low-temperature coolant can dissipate heat for the motor drive system. The coolant that has absorbed heat in the motor drive system is then returned to the evaporator 32 through the second valve port d2 and the first valve port d1 of the second valve V2, and dissipates heat again in the evaporator 32, thereby achieving a continuous heat dissipation function for the motor drive system. Thus, when the thermal management system is in the first operating mode, the heating function of the heat pump circulation loop enables the air conditioning box 10 to increase the cabin temperature. On this basis, the heat of the motor drive system can be transferred to the evaporator 32 of the heat pump circulation loop through the circulation of the coolant, so that the refrigerant can absorb more heat in the evaporator 32, thereby improving the heat exchange efficiency of the evaporator 32. As a result, the temperature of the refrigerant provided by the compressor M to the condenser 31 can be higher, so that the coolant can absorb more heat in the condenser 31, thereby improving the heat exchange efficiency of the air conditioning box 10. In addition, the electric heater PTC can be controlled according to the actual ambient temperature and the target temperature. When the residual heat of the heat pump circulation loop and the motor drive system cannot make the cabin temperature reach the target ambient temperature, the coolant supplied to the air conditioning box 11 can be heated by the electric heater PTC, which can further improve the heating efficiency of the air conditioning box. Therefore, since the waste heat of the motor electric drive system is used to improve the heating efficiency of the air-conditioning box 10, the heating time of the electric heater PTC can be reduced, and the electric energy consumed by the battery module due to thermal management can be reduced, which is beneficial to extending the vehicle's endurance time.

[0049] Exemplarily, the thermal management integrated module 30 also includes: a liquid replenishing tank 33 and a second electronic expansion valve T2; the liquid replenishing pipe 33 and the second electronic expansion valve T2 are sequentially arranged between the refrigerant outlet a2 of the condenser 31 and the refrigerant inlet b1 of the evaporator 32. The liquid replenishing tank 33 is used to replenish the liquid refrigerant to ensure that there is sufficient refrigerant in the heat pump circulation loop. The second electronic expansion valve T2 can be electrically connected to the controller 40 and can be opened or closed under the control of the controller 40. The refrigerant output from the refrigerant outlet a2 of the condenser 31 is a mixed state of gas and liquid at high temperature and low pressure. The gaseous refrigerant can be converted into liquid refrigerant by the second electronic expansion valve T2, so that the refrigerant delivered to the evaporator 32 only includes the liquid state.

[0050] The motor drive heat dissipation unit 30 includes a low-temperature radiator 21 and a motor drive system flow channel 22. The motor drive system flow channel 22 is arranged around the motor drive system to achieve a heat dissipation function. The coolant after heat dissipation through the evaporator 32 passes through the second water pump P2 and the low-temperature radiator 21 in sequence and enters the motor drive system flow channel 22. When the ambient temperature is low, the coolant is further dissipated through the low-temperature radiator 21, so that the motor drive system can be effectively dissipated after the coolant enters the motor drive system flow channel 22, thereby improving the heat dissipation efficiency of the motor drive system. When the ambient temperature is high, the air heat can be transferred to the coolant through the low-temperature radiator 21, so that the temperature of the coolant entering the evaporator 32 can be further increased, thereby further increasing the temperature of the refrigerant entering the condenser 31, and thus increasing the temperature of the coolant entering the air conditioner 10. This can improve the heating capacity of the air conditioner 10 without using the electric heater PTC, thereby extending the battery module life.

[0051] A thermal management system provided in an embodiment of the present invention integrates a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump, and a second water pump into a thermal management integrated module. This allows for integration of multiple valves and water pumps, simplifying the design of thermal management flow paths. A heat pump circulation system can be formed by connecting a compressor to the air conditioning unit via the thermal management integrated module. A heat dissipation circulation loop for the electric motor drive can be formed by connecting a heat dissipation portion of the electric motor drive to the thermal management integrated module. Furthermore, the heat pump circulation system and the heat dissipation loop of the heat dissipation portion of the electric motor drive system can intersect. When the thermal management system is in a first operating mode, by controlling the activation of the compressor, the first water pump, and the second water pump, controlling the connectivity of the valve ports of the first valve, the second valve, and the third valve, and controlling the heating of the electric heater based on the actual ambient temperature and the target temperature, the heat pump circulation loop can be used to heat the air conditioning unit. Heat from the electric motor drive system can also be transferred to the heat pump circulation loop to improve the heating efficiency of the air conditioning unit, thereby reducing the energy consumed by the battery module due to thermal management and thus extending the vehicle's cruising range.

[0052] Optional, Figure 3 is a schematic structural diagram of another thermal management system provided by an embodiment of the present invention. Figure 4 This is a system control diagram of another thermal management system provided by an embodiment of the present invention, combined with reference to Figure 3 and Figure 4 The thermal management system also includes a first electronic expansion valve T1; the refrigerant inlet f3 of the air-conditioning box 10 is connected to the refrigerant outlet a2 of the condenser 31, and the refrigerant outlet f4 of the air-conditioning box 10 is connected to the refrigerant inlet of the compressor 31 through the first electronic expansion valve T1; in the first working mode, the controller 40 also controls the first electronic expansion valve T1 to open or close according to the air humidity.

[0053] Specifically, when heating the cabin in a low-temperature environment, if the air humidity is too high, the cabin environment can also be dehumidified by controlling the first electronic expansion valve T1 to open. When the first electronic expansion valve T1 is opened, the high-temperature, low-pressure gas-liquid mixed refrigerant output by the condenser 31 passes through the first electronic expansion valve T1 and is converted into liquid refrigerant and enters the air-conditioning evaporator 12 to absorb heat, so that the air-conditioning evaporator 12 achieves a cooling effect, and the gaseous water in the air is condensed into liquid water, which can achieve a dehumidification effect while the air-conditioning warm core 11 is heating. The refrigerant is converted into a low-pressure, low-temperature gas by the air-conditioning evaporator 12 and then returns to the compressor M for compression again, thereby realizing the recycling of the refrigerant (such as Figure 3 (The refrigerant circuit is shown in orange).

[0054] For example, the air conditioner 10 includes a heater core 11 and an evaporator 12. The coolant inlet of the heater core 11 is connected to the coolant outlet of the first water pump P1, which in turn is connected to the second valve port e2 of the third valve V3. The refrigerant inlet of the evaporator 12 is connected to the refrigerant outlet a2 of the condenser 31 via the first electronic expansion valve T1, and the refrigerant outlet of the evaporator 13 is connected to the refrigerant inlet of the compressor M. In this way, the coolant in the heat pump circuit can pass through the heater core 11, allowing the heater core 11 to function as the heating unit of the air conditioner 10, using the coolant in the heat pump circuit to achieve heating. The refrigerant in the heat pump circuit can pass through the evaporator 12, allowing the evaporator 12 to function as the cooling unit of the air conditioner 10, using the refrigerant in the heat pump circuit to achieve cooling.

[0055] For example, the first valve V1, the second valve V2, and the third valve V3 can be valves with an appropriate number of valve ports based on design requirements. For example, in the above embodiment, the first valve V1 and the second valve V2 can be two-way valves with two valve ports, and the third valve V3 can be a four-way valve with four valve ports. In other embodiments, to meet more functional requirements, the first valve V1, the second valve V2, and the third valve V3 can also be configured with more valve ports, which is not specifically limited in the present embodiment. In the present invention, the first valve V1 is preferably configured as a three-way valve with three valve ports, the second valve V2 is configured as a five-way valve with five valve ports, and the third valve V3 is configured as a seven-way valve with seven valve ports, but the present invention is not limited thereto.

[0056] Optional, continue with reference Figure 3 and Figure 4 The thermal management system 100 further includes a battery heat sink 50. The thermal management integrated module 30 further includes a third water pump P3. The coolant inlet of the third water pump P3 is connected to the fifth port e5 of the third valve V3. The coolant outlet of the third water pump V3 is connected to the coolant inlet h1 of the battery heat sink 50. The coolant inlet h2 of the battery heat sink 50 is connected to the third port d3 of the second valve V2. The fourth port of the second valve V2 is connected to the sixth port e6 of the third valve V3. In the first operating mode, the controller 40 further controls the activation of the third water pump P3, the communication between the third port d3 and the fourth port d4 of the second valve V2, and the communication between the fifth port e5 and the sixth port e6 of the third valve V3.

[0057] Specifically, the battery heat dissipation portion 50 can be a coolant flow channel arranged around the battery module. In the first working mode, a coolant circuit can be additionally provided to dissipate heat from the battery module so that the battery module maintains a uniform temperature. In the first working mode, the third water pump P3 is controlled to start, the third valve port d3 and the fourth valve port d4 of the second valve V2 are controlled to be connected, and the fifth valve port e5 and the sixth valve port e6 of the third valve V3 are controlled to be connected. The power provided by the third water pump P3 can be used to repeatedly circulate the coolant flowing through the battery heat dissipation portion 50 through the third valve port d3 and the fourth valve port d4 of the second valve V2, the sixth valve port e6 and the fifth valve port e5 of the third valve V3 (such as Figure 3 The black coolant circuit shown in the figure allows the flowing coolant to dissipate heat from the battery module, keeping the battery module at a uniform temperature, which is beneficial to extending the service life of the battery module.

[0058] Optional, Figure 5 This is a schematic diagram of the structure of another thermal management system provided by an embodiment of the present invention, with reference to Figure 4 and Figure 5The coolant inlet of the third water pump P3 is also connected to the seventh valve port e7 of the third valve V3; the thermal management system 100 also has a second working mode. In the second working mode, the controller 40 controls the first water pump P1 to stop, controls the compressor M and the third water pump P3 to start, controls the first electronic expansion valve T1 to open, controls the third valve port e3 and the seventh valve port e7 of the third valve V3 to be connected, and controls the first valve port d1 and the third valve port d3 of the second valve V2 to be connected.

[0059] Specifically, the second working mode can be a mode in which the cockpit and battery module are cooled by a heat pump circulation loop under high temperature conditions. In the second mode, the first water pump P1 is controlled to stop, and the coolant in the air conditioning heater core 11 of the air conditioning box 10 does not circulate, and heating cannot be performed. By controlling the compressor M to start, the refrigerant circulates between the compressor M, the condenser 31, and the evaporator 32 (such as Figure 5 The refrigerant circuit shown in blue in the middle) controls the first electronic expansion valve T1 to open, so that part of the refrigerant can also circulate between the compressor M, the condenser 31 and the air conditioner evaporator 12 (as shown in FIG. Figure 5 The refrigerant circuit shown in orange in the middle) allows the high-temperature liquid refrigerant to enter the air-conditioning evaporator 12 to absorb heat, thereby enabling the air-conditioning box 10 to achieve the cooling function. At the same time, in the second mode, the third water pump P3 is controlled to start, and the third valve port e3 and the seventh valve port e7 of the third valve V3 are controlled to be connected, and the first valve port d1 and the third valve port d3 of the second valve V2 are controlled to be connected. Then, under the power of the third water pump P3, the coolant cooled by the evaporator 32 flows through the third valve port e3 and the seventh valve port e7 of the third valve V3 through the third water pump P3 and enters the battery heat dissipation part 50 to absorb heat, thereby dissipating heat and cooling the battery module, which can avoid the battery module temperature from being too high and is beneficial to extending the service life of the battery module. The coolant after passing through the battery heat dissipation part 50 returns to the evaporator 32 through the third valve port d3 and the first valve port d1 of the second valve V2, and dissipates heat and cools again, realizing the circulation of the coolant (as shown in FIG. Figure 5 The coolant circuit shown in red in the middle) can keep the coolant entering the battery heat dissipation unit 50 at a low temperature at all times.

[0060] Optional, Figure 6 This is a schematic diagram of the structure of another thermal management system provided by an embodiment of the present invention, with reference to Figure 4 and Figure 6 , the third valve port c3 of the first valve V1 is connected to the coolant inlet of the second water pump P2, and the coolant inlet a3 of the condenser 31 is also connected to the fifth valve port d5 of the second valve V2; in the second working mode, the controller 40 also controls the start-up of the second water pump P2, controls the communication between the first valve port c1 and the third valve port c3 of the first valve V1, and controls the communication between the second valve port d2 and the fifth valve port d5 of the second valve V2.

[0061] Specifically, the third valve port c3 of the first valve V1 is connected to the coolant inlet of the second water pump P2, and the coolant inlet a3 of the condenser 31 is also connected to the fifth valve port d5 of the second valve V2, so as to form another coolant circulation loop of the motor drive heat dissipation unit 20. In the second working mode, the second water pump P2 is controlled to start, the first valve port c1 and the third valve port c3 of the first valve V1 are controlled to be connected, and the second valve port d2 and the fifth valve port d5 of the second valve V2 are controlled to be connected. Under the power of the second water pump P2, the coolant flowing through the motor drive heat dissipation unit 20 can enter the condenser 31 (such as the second valve port d2 and the fifth valve port d5 of the second valve V2) through the second valve port d2 and the fifth valve port d5 of the second valve V2. Figure 6 The coolant circuit (shown in red in the middle) allows the coolant to transfer heat from the air and the motor drive system to the heat pump circuit within condenser 31, improving the heat exchange efficiency of condenser 31 and further enhancing the cooling effect of evaporator 12 within air conditioning unit 10. In this case, first valve port e1 of third valve V3 is disconnected from the other valve ports, preventing heat mixing and thus minimizing the cooling effect of air conditioning unit 10.

[0062] Optional, Figure 7 This is a schematic diagram of a thermal management system in the third state provided by an embodiment of the present invention, with reference to Figure 4 and Figure 7 , the coolant inlet of the third water pump P3 is also connected to the seventh valve port e7 of the third valve V3; the thermal management system 100 also has a third working mode. In the third working mode, the controller 40 controls the compressor M, the first water pump P1 and the third water pump P3 to start, controls the first valve port c1 and the second valve port c2 of the first valve V1 to be connected, controls the third valve port e3 and the seventh valve port e7 of the third valve V3 to be connected, controls the first valve e1 and the second valve e2 to be connected, and controls the third valve port d3 and the first valve port d1 of the second valve V2 to be connected; and the controller 40 also controls the first electronic expansion valve T1 to be opened or closed according to the air humidity, and controls the electric heater PTC heating according to the actual ambient temperature and the target temperature.

[0063] Specifically, the third working mode can be a working mode for heating the cockpit through the heat pump circulation loop and the waste heat of the battery module in a low temperature environment. In the second mode, by controlling the compressor M to start, the refrigerant circulates between the compressor M, the condenser 31, and the evaporator 32 (such as Figure 7 By controlling the first water pump P1 to start, and controlling the first valve port c1 and the second valve port c2 of the first valve V1 to communicate, and the first valve e1 and the second valve e2 of the third valve V3 to communicate, the coolant after heat exchange in the condenser 31 can circulate into the air conditioning heater 11 in the air conditioning box 10 (as shown in FIG. Figure 7 The cooling liquid circuit shown in green in the middle) allows the air conditioning warm core 11 to achieve a heating effect through the high-temperature cooling liquid. At the same time, by controlling the start-up of the third water pump P3, and controlling the third valve port e3 of the third valve V3 to be connected to the seventh valve port e7, and controlling the third valve port d3 of the second valve V2 to be connected to the first valve port d1, the cooling liquid that has absorbed heat through the battery heat dissipation unit 50 can be circulated into the evaporator 12 (as shown in FIG. Figure 7 The coolant circuit shown in red in the middle) can transfer the waste heat of the battery module to the evaporator 32, which can increase the heat absorbed by the refrigerant in the evaporator 32, thereby increasing the temperature of the gaseous refrigerant entering the condenser 31 after compression by the compressor M, so that the heat absorbed by the coolant in the condenser 31 increases, thereby increasing the heating capacity of the air conditioning heater core 11 in the air conditioning box 10, which is beneficial to reducing the service life of the electric heater PTC, thereby extending the battery life of the vehicle. Among them, when the air humidity is too high, the first electronic expansion valve T1 can also be controlled to open (such as Figure 7 The refrigerant circuit shown in orange in the middle) can dehumidify the environment while heating, and when the above heating effect still does not meet the target ambient temperature, the electric heater PTC can be controlled to energize and heat to improve the heating efficiency of the air-conditioning box 10.

[0064] Optional, Figure 8 This is a schematic diagram of a thermal management system in the fourth state provided by an embodiment of the present invention, with reference to Figure 4 and Figure 8 , the coolant inlet a3 of the condenser 31 is also connected to the fifth valve port d5 of the second valve V2; the thermal management system 100 also has a fourth working mode. In the fourth working mode, the controller 40 controls the compressor M, the first water pump P1, the second water pump P2 and the third water pump P3 to start, controls the second valve port e2 and the fifth valve port e5 of the third valve V3 to be connected, and the third valve port e3 and the fourth valve port e4 to be connected, and controls the first valve port d1 and the second valve port d2 of the second valve V2 to be connected, and the fifth valve port d5 and the third valve port d3 to be connected; and the controller 40 also controls the first electronic expansion valve T1 to be opened or closed according to the air humidity, and controls the electric heater PTC heating according to the actual ambient temperature and the target temperature.

[0065] Specifically, the fourth working mode can be a working mode in which the cockpit and battery module are auxiliary heated by the waste heat of the motor drive system on the basis of heat pump heating. By controlling the compressor M to start, the refrigerant circulates between the compressor M, the condenser 31, and the evaporator 32 (such as Figure 8By controlling the start-up of the first water pump P1 and the third water pump P3, and controlling the communication between the first valve port c1 and the second valve port c2 of the first valve V1, the communication between the second valve port e2 and the fifth valve port e5 of the third valve V3, and the communication between the third valve port d3 and the fifth valve port d5 of the second valve V2, the coolant after heat exchange in the condenser 31 can circulate through the first valve V1, the second valve V2, and the third valve to enter the air conditioning heater 11 and the battery heat dissipation unit 50 in the air conditioning box 10 (as shown in FIG. Figure 8 The coolant circuit shown in green in the middle allows the air conditioning warm core 11 to achieve a heating effect through the high-temperature coolant. At the same time, by controlling the start-up of the second water pump P2, and controlling the third valve port e3 and the fourth valve port e4 of the third valve V3 to be connected, and the first valve port d1 and the second valve port d2 of the second valve V2 to be connected, the coolant circulating through the motor drive heat dissipation unit 30 can enter the coolant circuit where the evaporator 32 is located, thereby transferring the heat of the air and the heat of the motor drive system to the heat pump circulation circuit, thereby achieving auxiliary heating of the cockpit and battery module by the air heat and the motor drive system, which can reduce the heating time or heating power of the electric heater PTC, and help extend the service life of the battery module in the vehicle.

[0066] Optional, Figure 9 This is a schematic diagram of the structure of a thermal management module provided by an embodiment of the present invention, combined with reference Figures 6-8 Any of the accompanying drawings and Figure 9 , the coolant flow channels of the thermal management module 100 do not overlap with each other.

[0067] Specifically, the structure of the coolant circuit in the prior art is relatively complex, resulting in overlapping coolant channels, so that when arranging channels in space and implementing the injection molding process, most of the time, two-layer or even three-layer channel circuits are used. Among them, for the setting of two-layer channels, at least three sets of injection molding molds and two welding molds are required for the injection molding process, and the process is complicated and the processing cost is high. In the embodiment of the present invention, by setting the coolant channels of the thermal management module 100 to overlap complementary, each coolant channel can be located on the same layer, so that only two sets of injection molding molds and one set of welding molds are required for the injection molding process, which can effectively simplify the process and reduce processing costs.

[0068] In an embodiment of the present invention, a thermal management integrated module is provided including a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump, a second water pump and a third water pump, and the first valve is provided as a three-way valve, the second valve is provided as a five-way valve, and the third valve is provided as a seven-way valve, so that the coolant flow channels of the thermal management integrated module are simple and do not overlap with each other, thereby effectively reducing the setting of the coolant flow channels, simplifying the design of the thermal management flow channels and improving space utilization, and each coolant flow channel can be provided on the same layer, so that only two sets of injection molding molds and one set of welding molds are required during the injection molding process, which can effectively simplify the process and reduce processing costs, and at the same time can realize multiple working modes of the thermal management system, can improve the energy utilization rate of the entire vehicle on the basis of completing heating or cooling, can effectively reduce the power consumption of the battery module in thermal management applications, thereby effectively extending the vehicle's endurance time.

[0069] Based on the same inventive concept, an embodiment of the present invention also provides a vehicle, which includes a motor drive system, a battery module and the thermal management system provided by any embodiment of the present invention. Therefore, the vehicle provided by the embodiment of the present invention includes the technical features of the thermal management system provided by any embodiment of the present invention, and can achieve the beneficial effects of the thermal management system provided by any embodiment of the present invention. The similarities can be referred to the above description of the thermal management system provided by the embodiment of the present invention, and will not be repeated here.

[0070] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0071] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A thermal management system, applied to a vehicle, characterized in that: include: Air conditioning box, motor electric drive heat dissipation unit, compressor, electric heater, thermal management integrated module and controller; The thermal management integrated module includes a condenser, an evaporator, a first valve, a second valve, a third valve, a first water pump and a second water pump; The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor, the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the compressor; The coolant inlet of the condenser is connected to the first valve port of the third valve, and the coolant outlet of the condenser is connected to the first valve port of the first valve; the second valve port of the first valve is connected to the coolant inlet of the first water pump, and the coolant outlet of the first water pump is connected to the coolant inlet of the air-conditioning box, and the coolant outlet of the air-conditioning box is connected to the second valve port of the third valve, and the electric heater is provided on the flow path between the first water pump and the coolant inlet of the air-conditioning box; The coolant inlet of the evaporator is connected to the first valve port of the second valve, the coolant outlet of the evaporator is connected to the third valve port of the third valve, the fourth valve port of the third valve is connected to the coolant inlet of the second water pump, the coolant outlet of the second water pump is connected to the coolant inlet of the motor electric drive heat dissipation unit, and the coolant outlet of the motor electric drive heat dissipation unit is connected to the third valve port of the second valve; The thermal management system has a first operating mode. In the first operating mode, the controller controls the start-up of the compressor, the first water pump and the second water pump, controls the communication between the first valve port and the second valve port of the first valve, controls the communication between the first valve port and the second valve port of the third valve, and the communication between the third valve port and the fourth valve port, controls the communication between the first valve port and the second valve port of the second valve, and controls the heating of the electric heater according to the actual ambient temperature and the target temperature.

2. The thermal management system according to claim 1, characterized in that Also includes: Battery heat dissipation unit; the thermal management integrated module also includes: a third water pump; The coolant inlet of the third water pump is connected to the fifth valve port of the third valve, the coolant outlet of the third water pump is connected to the coolant inlet of the battery heat dissipation unit, the coolant inlet of the battery heat dissipation unit is connected to the third valve port of the second valve, and the fourth valve port of the second valve is connected to the sixth valve port of the third valve; In the first working mode, the controller further controls the start-up of the third water pump, controls the third valve port and the fourth valve port of the second valve to be connected, and controls the fifth valve port and the sixth valve port of the third valve to be connected.

3. The thermal management system according to claim 2, characterized in that: Also includes: First electronic expansion valve; The refrigerant inlet of the air-conditioning box is connected to the refrigerant outlet of the condenser, and the refrigerant outlet of the air-conditioning box is connected to the refrigerant inlet of the compressor through the first electronic expansion valve; In the first working mode, the controller further controls the first electronic expansion valve to open or close according to air humidity.

4. The thermal management system according to claim 3, characterized in that: The coolant inlet of the third water pump is also connected to the seventh valve port of the third valve; The thermal management system also has a second operating mode. In the second operating mode, the controller controls the first water pump to stop, controls the compressor and the third water pump to start, controls the first electronic expansion valve to open, controls the third valve port and the seventh valve port of the third valve to be connected, and controls the first valve port and the third valve port of the second valve to be connected.

5. The thermal management system according to claim 4, characterized in that: The third valve port of the first valve is connected to the coolant inlet of the second water pump, and the coolant inlet of the condenser is also connected to the fifth valve port of the second valve; In the second working mode, the controller further controls the start-up of the second water pump, controls the communication between the first valve port and the third valve port of the first valve, and controls the communication between the second valve port and the fifth valve port of the second valve.

6. The thermal management system according to claim 3, characterized in that: The coolant inlet of the third water pump is also connected to the seventh valve port of the third valve; The thermal management system further has a third operating mode. In the third operating mode, the controller controls the compressor, the first water pump, and the third water pump to start, controls the first valve port of the first valve to be connected to the second valve port, controls the third valve port of the third valve to be connected to the seventh valve port, controls the first valve to be connected to the second valve, and controls the third valve port of the second valve to be connected to the first valve port. Furthermore, the controller controls the first electronic expansion valve to open or close according to the air humidity, and controls the electric heater to heat according to the actual ambient temperature and the target temperature.

7. The thermal management system according to claim 3, characterized in that: The coolant inlet of the condenser is also connected to the fifth valve port of the second valve; The thermal management system further has a fourth operating mode. In the fourth operating mode, the controller controls the compressor, the first water pump, the second water pump, and the third water pump to start, controls the second valve port of the third valve to be connected to the fifth valve port, and the third valve port to be connected to the fourth valve port, and controls the first valve port and the second valve port of the second valve to be connected to the fifth valve port, and the fifth valve port to be connected to the third valve port; Furthermore, the controller controls the first electronic expansion valve to open or close according to the air humidity, and controls the electric heater to heat according to the actual ambient temperature and the target temperature.

8. The thermal management system according to claim 3, characterized in that: The thermal management integrated module further includes: a liquid replenishing tank and a second electronic expansion valve; the liquid replenishing pipe and the second electronic expansion valve are sequentially arranged between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator; The air-conditioning box includes an air-conditioning warm core and an air-conditioning evaporator; the coolant inlet of the air-conditioning warm core is connected to the coolant outlet of the first water pump, and the coolant outlet of the air-conditioning warm core is connected to the second valve port of the third valve; the refrigerant inlet of the air-conditioning evaporator is connected to the refrigerant outlet of the condenser through the first electronic expansion valve, and the refrigerant outlet of the air-conditioning evaporator is connected to the refrigerant inlet of the compressor.

9. The thermal management system according to claim 4, characterized in that: The coolant flow channels of the thermal management module do not overlap with each other.

10. A vehicle, characterized in that: include: A motor drive system, a battery module, and a thermal management system according to any one of claims 1 to 9.

Images