Electric vehicle and thermal management assembly thereof

Abstract

The present invention provides a thermal management assembly of an electric vehicle and an electric vehicle, and relates to the field of vehicle technology. The thermal management assembly of the electric vehicle includes multiple subsystems, including an electric drive thermal management system, a battery thermal management system, and an air conditioning thermal management system, and also includes: an auxiliary water tank for storing and providing a heat exchange medium; a water system including multiple multi-way valves, connecting the heat exchange medium to form a cooling circuit through the electric drive thermal management system, the battery thermal management system, and the air conditioning thermal management system; a pump system including multiple pumps connected to the water system for conveying the heat exchange medium; a controller configured to: receive application scenario instructions and vehicle temperature status; and control the working status of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature status. It can realize power consumption and improve vehicle driving range.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an electric vehicle and a thermal management assembly thereof. Background Art

[0002] In related technologies, the electric assembly water circuit, battery module, heat pump module and engine water circuit are integrated and controlled to coordinate the systems with each other, reduce the energy consumption of the entire vehicle, or achieve heat management and reasonable distribution and utilization of the entire vehicle in various modes.

[0003] The drive thermal management assembly, battery thermal management system, and air conditioning thermal management system are independent of each other because of their different temperature requirements. The heat generated by the electric drive system of existing models is not effectively utilized, such as Figure 1 The demonstrated prior art is a common thermal management assembly, in which the battery and heater can only be heated by their respective PTCs, which results in slow heating speed, large heat loss, and excessive consumption of electric vehicle power, thus shortening the vehicle's range. In addition, the electric drive system cooling circuit, battery circuit, and heater circuit require multiple auxiliary water tanks for water replenishment, which increases the weight of the vehicle and does not conform to the current trend of lightweight design.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The present invention provides an electric vehicle and a thermal management assembly thereof, which solve the technical problems in the prior art such as slow heating speed, large heat loss, consumption of electric vehicle power, shortened vehicle cruising range, etc. in the thermal management assembly design, and inability to achieve lightweight.

[0006] In a first aspect of the present invention, a thermal management assembly of an electric vehicle is provided, comprising a plurality of subsystems, wherein the subsystems include an electric drive thermal management system, a battery thermal management system and an air conditioning thermal management system, and wherein the subsystems further include: an auxiliary water tank for storing and providing a heat exchange medium; a water system for connecting the heat exchange medium to form a cooling circuit through the electric drive thermal management system, the battery thermal management system and the air conditioning thermal management system, wherein the water system includes a plurality of multi-way valves for controlling the direction of the heat exchange medium; a pump system for conveying the heat exchange medium including a plurality of pump bodies connected to the water system; and a controller for electrically connecting the subsystems, the multi-way valves and the pump system, and configured to: receive application scenario instructions and vehicle temperature status; and control the working status of the subsystems and the direction of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature status.

[0007] In the optional solution of this application, the water system includes:

[0008] The first pipeline is connected to the auxiliary water tank and passes through the electric drive thermal management system;

[0009] The second pipeline passes through the battery thermal management system;

[0010] The third pipeline passes through the air conditioning thermal management system;

[0011] The first pipeline is connected in series and / or in parallel with the second pipeline through the first multi-way valve, and the third pipeline and the first pipeline are connected in series and / or in parallel through the second multi-way valve, so that the heat exchange medium passes through at least one of the first pipeline, the second pipeline and the third pipeline.

[0012] In an optional scheme of the present application, the pump body system includes: a first pump body, connected to the first pipeline, used to control the first pipeline to transport the heat exchange medium; a second pump body, connected to the second pipeline, used to control the second pipeline to transport the heat exchange medium; a third pump body, connected to the third pipeline, used to control the third pipeline to transport the heat exchange medium.

[0013] An optional solution of the present application also includes: a multi-way proportional valve, which is connected in series to the water system and is used to control the delivery ratio of the heat exchange medium in the water system.

[0014] In an optional solution of the present application, the electric drive thermal management system includes: a radiator, connected in parallel to the water system; a multi-media heat exchanger, connected to the first pipeline and connected to the powertrain; wherein the multi-media heat exchanger acts on the powertrain to perform heat exchange on the motor.

[0015] In an optional solution of the present application, the battery thermal management system includes: a water cooler connected to the second pipeline and connected to the battery; wherein the heat exchange medium passes through the battery and the water cooler in sequence through the second pipeline to achieve cooling.

[0016] In an optional solution of the present application, the air conditioning thermal management system includes: a PTC connected to the third pipeline; and a heater core connected to the third pipeline; wherein the PTC is heated by the heater core.

[0017] In an optional solution of the present application, the subsystem further includes:

[0018] The refrigerant system is used to produce refrigerant, which is connected to the water cooler and the multi-media heat exchanger through an expansion valve for heat exchange.

[0019] In the optional scheme of the present application, the working state of the subsystem and the guidance of the heat exchange medium are controlled according to the application scenario instructions and / or the vehicle temperature state. The following are included: When a battery cooling instruction is received and the vehicle temperature state is that the maximum battery temperature is greater than the electric drive water outlet temperature and the ambient temperature in turn, only the first pipeline and the second pipeline are controlled to form a loop to cool the battery through the radiator; When a battery cooling instruction is received and the vehicle temperature state is that the maximum battery temperature is less than the electric drive water outlet temperature, or a battery thermal balancing instruction is received, or no application scenario instruction is received, but the temperature difference between the maximum and minimum battery temperatures is greater than or equal to a preset first temperature, the refrigerant system is controlled to start and the second pipeline path to form a loop; When the motor temperature is greater than the preset second temperature and the electric drive water inlet temperature is greater than the preset third temperature When the temperature is reached, the refrigerant system is started, the first pipeline and the radiator passage are controlled to form a loop, and the multi-media heat exchanger is controlled to cool the motor; when a battery heating instruction is received, the first pipeline and the second pipeline passage are controlled to form a loop, and the heat exchange medium in the loop is heated by the multi-media heat exchanger to heat the battery; when a cabin heating instruction is received, and the water temperature of the electric drive system is higher than the preset fourth temperature, the first pipeline, the second pipeline, and the third pipeline passage are controlled to form a loop, and the passenger compartment is heated through the heater core by the waste heat of the electric drive system; when a single passenger compartment heating instruction is received, the third pipeline passage is controlled to form a loop, the PTC is controlled to work for heating, and the heat is transferred to the passenger compartment through the heater core; when a battery heating instruction and a cabin heating instruction are received at the same time, the first pipeline, the second pipeline, and the third pipeline passage are controlled to form a loop, and the battery is heated by the waste heat of the electric drive system, and the PTC is controlled to work to heat the cabin.

[0020] In a second aspect of the present invention, an electric vehicle is also provided, comprising the above-mentioned thermal management assembly.

[0021] In summary, the embodiment of the present invention provides a thermal management assembly of an electric vehicle, which connects the subsystems through the water system, the pump system and the multi-way valve, and controls the multi-way valve, such as a four-way valve, a four-way proportional valve and other solenoid valves, so that the overall water system can achieve circuit conditions such as series connection and parallel connection, thereby optimizing the thermal management of the whole vehicle. The cooling medium can selectively pass through the corresponding subsystem, and the controller controls the guidance of the cooling medium and the working state of the subsystem according to the application scenario instructions, so that there is no need to set up a separate thermal management system for each subsystem, reducing the design and hardware costs. At the same time, through this method, the heat generated by the subsystem itself can be used by other subsystems, such as using the heat generated by the electric drive system to heat the battery and the heating system during driving, which can realize power consumption and improve the vehicle's driving range; when charging at low temperature, the heat generated by the electric drive system is used to quickly heat the battery, without the need for a separate PTC to heat the battery; at the same time, the entire thermal management assembly uses only one auxiliary water tank, which can greatly reduce the weight of the vehicle body compared to the multiple auxiliary water tanks in the prior art, and realize the lightweight design of the vehicle.

[0022] Other features and advantages of the embodiments of the present invention will be described in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a connection topology diagram of a thermal management assembly under the prior art provided by an embodiment of the present invention;

[0025] Figure 2 It is a connection topology diagram of a thermal management assembly of an electric vehicle provided by an embodiment of the present invention;

[0026] Figure 3 It is a connection topology diagram of a thermal management assembly of an electric vehicle provided by a specific embodiment of the present invention;

[0027] Figure 4 is a connection topology diagram of the thermal management assembly in Example 1 provided in an embodiment of the present invention;

[0028] Figure 5 is a connection topology diagram of the thermal management assembly in Example 2 provided by an embodiment of the present invention;

[0029] Figure 6 is a connection topology diagram of the thermal management assembly in Example 3 provided in an embodiment of the present invention;

[0030] Figure 7 is a connection topology diagram of the thermal management assembly in Example 4 provided in an embodiment of the present invention;

[0031] Figure 8 is a connection topology diagram of the thermal management assembly in Example 5 provided in an embodiment of the present invention;

[0032] Fig. 9 is a connection topology diagram of the thermal management assembly in Example 6 provided in an embodiment of the present invention;

[0033] Fig.10 is a connection topology diagram of the thermal management assembly in Example 7 provided in an embodiment of the present invention; and

[0034] Fig.11 It is a connection topology diagram of the thermal management assembly in Example 8 provided in an embodiment of the present invention.

[0035] In the above drawings, the components represented by the reference numerals are listed as follows:

[0036] 100. Thermal management assembly;

[0037] 1011. Electric drive thermal management system; 1012. Battery thermal management system;

[0038] 1013. Air conditioning thermal management system; 102. Auxiliary water tank;

[0039] 103. Water system; 104. Pump system;

[0040] 105. Radiator; 106. Four-way proportional valve;

[0041] 107. Refrigerant system; 1011a. Multi-media heat exchanger;

[0042] 1012a, water cooler; 1013a, heater core;

[0043] 1013b, temperature coefficient thermistor; 103a, first pipeline;

[0044] 103b, second pipeline; 103c, third pipeline;

[0045] 104a, a first pump body; 104b, a second pump body;

[0046] 104c, a third pump body; 201, a driving circuit board;

[0047] 201, drive controller; 203, motor;

[0048] 301. a first four-way valve; 302. a four-way pipe;

[0049] 303. Three-way valve; 401. Battery. DETAILED DESCRIPTION

[0050] In order to make the above and other features and advantages of the present invention more clear, the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Technologies, methods, and systems known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the authorization specification.

[0053] Please continue reading Figure 1 , Figure 1 This is a connection topology diagram of a thermal management assembly under the prior art provided by an embodiment of the present invention. In this thermal management assembly, all subsystems are independently set up. The driving thermal management assembly, battery thermal management system, and air conditioning thermal management system require their own PTC (temperature coefficient thermistor, or other heating elements) for heating, resulting in slow heating speed, shortened cruising range, etc. At the same time, each system requires an independent auxiliary water tank, which does not conform to the existing lightweight design concept.

[0054] Therefore, the embodiment of the present invention provides a general inventive concept, namely, a thermal management assembly of an electric vehicle, which aims to solve the problems existing in the above prior art. The subsystem can realize circuit conditions such as series connection and parallel connection by reasonably designing the pipeline and controlling it by using valves and pump bodies, saving costs and reducing the weight of the whole vehicle; the high-load condition of the powertrain uses the refrigerant heat exchanger through the multi-media heat exchanger to increase the peak power of the powertrain, thereby realizing efficient thermal management.

[0055] [Overall Inventive Concept]

[0056] See also Figure 2 , Figure 21 is a connection topology diagram of a thermal management assembly 100 of an electric vehicle provided in an embodiment of the present invention. The thermal management assembly 100 includes multiple subsystems. The subsystems provided in the embodiment of the present invention include an electric drive thermal management system 1011, a battery thermal management system 1012, and an air conditioning thermal management system 1013. The thermal management assembly 100 also includes:

[0057] Auxiliary water tank 102, used for storing and providing heat exchange medium;

[0058] A water system 103, connected with a heat exchange medium to form a cooling circuit via the electric drive thermal management system 1011, the battery thermal management system 1012 and the air conditioning thermal management system 1013, the water system 103 includes a plurality of multi-way valves, optionally a multi-way battery valve, for controlling the guidance of the heat exchange medium;

[0059] The pump system 104 includes a plurality of pumps connected to the water system 103 and is used to transport heat exchange medium;

[0060] The controller, electrically connected to the subsystem, the multi-way valve and the pump system 104, is configured to:

[0061] Receive application scenario instructions and vehicle temperature status;

[0062] Control the operating status of the subsystem and the direction of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature status.

[0063] It can be understood that the thermal management assembly 100 provided in the general inventive concept of an embodiment of the present invention combines the electric drive thermal management system 1011, the battery thermal management system 1012 and the air-conditioning thermal management system 1013 using the water system 103 and the pump body system 104, so that the cooling medium can selectively pass through each system under the action of the controller, and the guidance of the cooling medium is controlled according to the specific working conditions. Only one auxiliary water tank 102 is needed in the entire thermal management assembly system 100. Compared with multiple auxiliary water tanks in the prior art, the weight of the vehicle body can be greatly reduced, thereby realizing a lightweight design of the vehicle.

[0064] In this embodiment of the invention, each system needs to correspond to its own waterway, and each waterway is interconnected, that is, the waterway system 103 includes:

[0065] The first pipeline 103a is connected to the auxiliary water tank 102 and passes through the electrically driven thermal management system 1011;

[0066] The second pipeline 103b passes through the battery thermal management system 1012;

[0067] The third pipeline 103c passes through the air conditioning thermal management system 1013;

[0068] The first pipeline 103a and the second pipeline 103b are connected in series and / or in parallel, and the third pipeline 103c and the first pipeline 103a are connected in series and / or in parallel, so that the heat exchange medium can selectively pass through at least one or a combination of the first pipeline 103a, the second pipeline 103b and the third pipeline 103c. Optionally, the output end of the auxiliary water tank 102 is taken as the flow direction, first passing through the first pipeline 103a (electrically driven thermal management system 1011), the second pipeline 103c, and the third pipeline 103c. 103b is connected in parallel to the first pipeline 103a through the first four-way valve. The heat exchange medium in the auxiliary water tank can be directly output through the first four-way valve, or it can be output through the second pipeline 103b and then through the first four-way valve. The input end of the auxiliary water tank 102 is connected to the four-way pipe, and two ports of the four-way pipe are connected to the third pipeline 103c to form a loop. The other two ports are connected to the auxiliary water tank 102 and the first four-way valve to form another loop, so that the third pipeline 103c and the first pipeline 103a also form a parallel relationship.

[0069] Among them, the four-way pipe is in a normally open state.

[0070] Furthermore, the pump system 104 may include:

[0071] The first pump body 104a is connected to the first pipeline 103a and is used to control the first pipeline 103a to transport the heat exchange medium;

[0072] The second pump body 104b is connected to the second pipeline 103b and is used to control the second pipeline 103b to transport the heat exchange medium;

[0073] The third pump body 104c is connected to the third pipeline 103c and is used to control the third pipeline 103c to transport the heat exchange medium.

[0074] It can be understood that through the design of pipelines, pump bodies and multi-way valves, the first pump body 104a, the second pump body 104b and the third pump body 104c can provide delivery pressure in their respective pipelines, and the multi-way valve is adopted so that the cooling medium can selectively pass through any one of the electric drive thermal management system 1011, the battery thermal management system 1012, and the air conditioning thermal management system 1013.

[0075] The embodiment of the present invention does not limit the specific shape of the pipeline structure 103, that is, as long as the cooling medium can pass through one or any combination of the electric drive thermal management system 1011, the battery thermal management system 1012 and the air conditioning thermal management system 1013.

[0076] The electric drive thermal management system 1011 includes:

[0077] The radiator 105 is connected in parallel to the water system 103;

[0078] A multi-medium heat exchanger (not shown), connected to the first pipeline 103a and connected to the motor;

[0079] Among them, the multi-media heat exchanger acts on the power assembly to perform heat exchange on the power assembly.

[0080] It can be understood that the multi-media heat exchanger can use the refrigerant to exchange heat with the powertrain and increase the peak power of the powertrain.

[0081] It can be understood that the radiator 105 is usually partially arranged outside the vehicle body and in contact with the air. The radiator 105 is composed of three parts: a water inlet chamber, a water outlet chamber and a radiator core. The cooling medium flows in the core of the radiator 105 through the water system 103, and the air passes outside the radiator. The hot coolant cools down due to heat dissipation to the air, and the cold air heats up due to absorbing the heat dissipated by the coolant, thereby achieving heat exchange.

[0082] The thermal management assembly 100 further includes:

[0083] The multi-way proportional valve 106 is connected to the first pipeline 103a, the second pipeline 103b, the third pipeline 103c and the radiator 105 respectively, and is used to control the delivery ratio of the heat exchange medium in the water system.

[0084] It can be understood that the multi-way proportional valve 106 is connected in series to the water system to control the delivery rate of the heat exchange medium, wherein the radiator 105 and the water system are in parallel, and the cooling medium can only pass through the water system or can be introduced through the radiator 105.

[0085] The battery thermal management system 1012 includes:

[0086] A water cooler (not shown), connected to the second pipeline 103b and connected to the battery;

[0087] The heat exchange medium is cooled by passing through the battery and the water cooler in sequence through the second pipeline 103b.

[0088] The air conditioning thermal management system 1013 includes:

[0089] PTC (not shown), connected to the third pipeline 103c;

[0090] The warm air core (not shown) is connected to the third pipe 103c.

[0091] Among them, PTC is heated by the heater core.

[0092] The subsystem also includes:

[0093] The refrigerant system 107 is used to manufacture a refrigerant circuit, and the refrigerant is connected to the water cooler and the multi-media heat exchanger through an expansion valve for heat exchange.

[0094] For the controller, in a specific solution of an embodiment of the present invention, controlling the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instruction and / or the vehicle temperature state includes:

[0095] S101, receiving a battery cooling instruction, and the vehicle temperature state is that the highest battery temperature is greater than the electric drive water outlet temperature and the ambient temperature in sequence, and only the first pipeline 103a and the second pipeline 103b are controlled to form a loop to cool the battery 401 through the radiator 105;

[0096] S102: receiving a battery cooling instruction, and the vehicle temperature state is that the maximum battery temperature is lower than the electric drive water outlet temperature, or receiving a battery thermal balance instruction, or not receiving an application scenario instruction, but the temperature difference between the maximum and minimum battery temperatures is greater than or equal to a preset first temperature, controlling the refrigerant system to start and the second pipeline 103b to form a loop;

[0097] S103, when the temperature of the motor 203 is greater than the preset second temperature and the temperature of the electric drive water inlet is greater than the preset third temperature, the refrigerant system 107 is controlled to start, the first pipeline 103a and the radiator 105 passage form a loop, and the multi-medium heat exchanger 1011a is controlled to cool the motor 203;

[0098] S104, receiving a battery heating instruction, controlling the passages of the first pipeline 103a and the second pipeline 103b to form a loop, and heating the heat exchange medium in the loop through the multi-medium heat exchanger 1011a to heat the battery 401;

[0099] S105, receiving a cabin heating instruction, and the water temperature of the electric drive system is higher than a preset fourth temperature, controlling the first pipeline 103a, the second pipeline 103b, and the third pipeline passage 103c to form a loop, and heating the passenger cabin through the waste heat of the electric drive system through the heater core;

[0100] S106, receiving a single passenger compartment heating instruction, controlling the passage of the third pipeline 103c to form a loop, controlling the PTC to work and heat, and transferring heat to the passenger compartment through the heater core 1013a;

[0101] S107, receiving the battery heating command and the cabin heating command at the same time, controlling the passages of the first pipeline 103a, the second pipeline 103b, and the third pipeline 103c to form a loop, and using the waste heat of the electric drive system to heat the battery 401, and controlling the PTC to work and heat the cabin.

[0102] The thermal management assembly 100 described above can achieve the following effects:

[0103] The embodiment of the present invention provides a thermal management assembly 100 of an electric vehicle, which connects the subsystems through a water system 103, a pump system 104 and a multi-way valve, and controls the multi-way valve, such as a four-way valve, a four-way proportional valve and other solenoid valves, so that the overall water system can achieve circuit conditions such as series connection and parallel connection, thereby optimizing the thermal management of the whole vehicle. The cooling medium can selectively pass through the corresponding subsystem, and the controller controls the guidance of the cooling medium and the working state of the subsystem according to the application scenario instruction, so that each subsystem does not need to set up a separate thermal management system, reducing the design and hardware costs. At the same time, through this method, the heat generated by the subsystem itself can be used by other subsystems, such as using the heat generated by the electric drive system to heat the battery 401 and the heating system during driving, which can realize power consumption and improve the vehicle's driving range; when charging at low temperature, the heat generated by the electric drive system is used to quickly heat the battery, without the need for a separate PTC to heat the battery 401; at the same time, the entire thermal management assembly uses only one auxiliary water tank 102, which can greatly reduce the weight of the vehicle body compared to the multiple auxiliary water tanks in the prior art, and realize the lightweight design of the vehicle. [Specific embodiment]

[0105] See also Figure 3 , Figure 3 It is a connection topology diagram of a thermal management assembly of an electric vehicle provided by a specific embodiment of the present invention. Some specific embodiments are provided below. In this specific embodiment, the electric drive thermal management system 1011 includes: a multi-media heat exchanger 1011a, the battery thermal management system 1012 includes: a water cooler 1012a, and the air conditioning thermal management system 1013 includes: a heater core 1013a and a temperature coefficient thermistor 1013b (temperature coefficient thermistor: PTC), wherein the temperature coefficient thermistor 1013b is heated by the heater core 1013a.

[0106] In the embodiment of the present invention, the first pump body 104a is connected along the output end of the auxiliary water tank 102, and the output end of the first pump body 104a passes through the drive board 201 (drive board: 3IN1) and the controller 202 (controller: MCU) in sequence, and then connects to the multi-media heat exchanger 1011a, and the multi-media heat exchanger 1011a acts on the motor 203 to perform heat exchange with the motor 203. Among them, from the first pump body 104a to the multi-media heat exchanger 1011a is the first pipeline 103a.

[0107] The output end of the multi-media heat exchanger 1011a is connected to a port of the first four-way valve 301, and a port of the first four-way valve 301 is connected to the second pump body 104b. The output end of the second pump body 104b passes through the battery 401 and is input to the water cooler 1012a. The output end of the water cooler 1012a is connected to another port of the first four-way valve 301, wherein the second pipeline 103b runs from the second pump body 104b to the water cooler 1012.

[0108] Furthermore, the remaining port of the first four-way valve 301 is connected to the four-way proportional valve 106, one port of the four-way proportional valve is connected to the radiator 105, and one port is connected to the four-way pipe 302, and the four-way pipe 302 is connected to the auxiliary water tank 102, thereby forming a loop in which the first pipe 103a and the second pipe 103b are connected in parallel.

[0109] Furthermore, the remaining port of the four-way proportional valve 106 is split after passing through the temperature coefficient thermistor 1013b, one branch passes through the warm air core 1013a, and then passes through the third pump body 104c and is connected to the three-way valve 303, and the other branch is directly connected to the three-way valve 303, and the three-way valve 303 is connected to the four-way pipe 302. Among them, the temperature coefficient thermistor 1013b to the warm air core 1013 and then to the third pump body 104 is the third pipeline 103c. Thus, a loop in which the third pipeline 103c and the first pipeline 103a are connected in parallel is formed.

[0110] It can be seen that the heat exchange medium from the auxiliary water tank 102 can pass through only any one of the first pipe 103a, the second pipe 103b, and the third pipe 103c, or through the first pipe 103a and the second pipe 103b, or the first pipe 103a and the third pipe 103c, or the second pipe 103b and the third pipe 103c, or through the first pipe 103a, the second pipe 103b, and the third pipe 103c at the same time.

[0111] It is understandable that the vehicle body hardware that the first pipe 103a, the second pipe 103b, and the third pipe 103c pass through can be flexibly designed, such as the drive board 201 and the controller 202 provided in the embodiment of the present invention, which are mainly set according to the application scenario and specific needs. Then, on the basis of the above, making the water system pass through other hardware facilities should fall within the protection scope covered by the embodiment of the present invention.

[0112] In this embodiment, the refrigerant system 107 is connected to the water cooler 1012a and the multi-media heat exchanger 1011a through an expansion valve (not marked) for heat exchange.

[0113] Example 1:

[0114] See also Figure 4 ; Figure 4 This is a connection topology diagram of the thermal management assembly in Example 1 provided in an embodiment of the present invention. The application scenario at this time is:

[0115] The controller receives an application scenario instruction for a battery cooling instruction, and the vehicle temperature status at this time is: battery maximum temperature > electric drive water outlet temperature > ambient temperature; and at this time the battery maximum temperature is 2 to 5° higher than the electric drive water outlet temperature, optionally 3°.

[0116] The controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0117] Control the passage of the first pipeline 103a and the second pipeline 103b to cool the battery through the radiator 105;

[0118] Use the external radiator 105 to cool the heat exchange medium and thus cool the battery 401. The water cooler 1012a and the multi-media heat exchanger 1011a do not work and only serve as pipelines. At this time, the circulating water path is: first pump body → 3IN1 → MCU → multi-media heat exchanger → first four-way valve → second pump body → battery → water cooler → first four-way valve → four-way proportional valve → radiator → four-way pipe → auxiliary water tank → first pump body. (For the convenience of explanation and viewing, long dashed lines represent water circuits, solid lines represent non-circulating circuits, dotted lines represent refrigerant circuits, non-solid arrows represent oil circuits, and no numbers are marked in the circulating water circuits, the same below)

[0119] Example 2:

[0120] See also Figure 5 ; Figure 5 This is a connection topology diagram of the thermal management assembly in Example 2 provided in an embodiment of the present invention. The application scenario at this time is:

[0121] A battery cooling instruction is received, the battery maximum temperature is less than the electric drive water outlet temperature, or the battery is thermally balanced, the battery has no cooling or heating request, and the temperature difference between the battery maximum temperature and the battery minimum temperature is greater than or equal to a preset first temperature, which can optionally be 5°.

[0122] The controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0123] Control the passage of the second pipeline 103b to form a loop;

[0124] When the battery needs to be cooled, the first pipeline 103a is completely disconnected from the second pipeline 103b, and the water cooler 1012a passes through the expansion valve, and the refrigerant system 107 starts to work, using the refrigerant of the refrigerant system 107 to circulate in the second pipeline 103b to cool the battery 401. If a battery thermal balance instruction is received, the first pipeline 103a and the second pipeline 103b are also completely disconnected. The difference is that the refrigerant system 107 does not work at this time, and the water cooler 1012a does not exchange heat at this time and only acts as a pipeline function, so that the heat exchange medium continuously exchanges heat with the battery 401 to achieve thermal balance. In the above two situations, the circulating water path is: second pump body → battery → water cooler → four-way valve → second pump body.

[0125] Example 3:

[0126] See also Figure 6 ; Figure 6 This is a connection topology diagram of the thermal management assembly in Example 3 provided in an embodiment of the present invention. The application scenario at this time is:

[0127] The motor temperature is greater than the preset second temperature and the electric drive water inlet temperature is greater than the preset third temperature. The second temperature can be optionally a value between 140 and 170°, preferably 160°, and the third temperature can be optionally 65°C.

[0128] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0129] Control the refrigerant system 107 to start, the first pipeline 103a and the radiator 105 to form a loop, and control the multi-medium heat exchanger 1011a to cool the motor 203;

[0130] At this time, the first pipeline 103a forms a loop alone, the refrigerant system 107 starts to work, the multi-media heat exchanger 1011a starts to act on the motor 203 to cool the motor 203, the heat exchange medium in the first pipeline 103a is connected to the radiator 105, and the radiator 105 cools the heat exchange medium in the loop. At this time, the circulating water path is: first pump body → 3IN1 → MCU → multi-media heat exchanger → first four-way valve → four-way proportional valve → radiator → four-way pipe → auxiliary water tank → first pump body.

[0131] Example 4:

[0132] See also Figure 7 ; Figure 7 : is a connection topology diagram of the thermal management assembly in Example 4 provided in an embodiment of the present invention, and the application scenario at this time is:

[0133] Received crew compartment cooling command.

[0134] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0135] Controlling the operation of the refrigerant system 107;

[0136] At this time, the refrigerant circuit of the refrigerant system 107 begins to form refrigerant to cool the passenger compartment through a blower (unnumbered). This method is a conventional air-conditioning cooling method and will not be elaborated on again.

[0137] Example 5:

[0138] See also Figure 8 ; Figure 8This is a connection topology diagram of the thermal management assembly in Example 5 provided in an embodiment of the present invention. The application scenario at this time is:

[0139] A battery heating command was received.

[0140] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0141] The passages of the first pipeline 103 a and the second pipeline 103 b are controlled to form a loop, and the heat exchange medium in the loop is heated by the multimedia heat exchanger 1011 a to heat the battery 401 .

[0142] In the case of charging, the motor 203 generates heat by itself, and the coolant in the heating circuit is heated by the multi-media heat exchanger 1011a to heat the battery 401; in the case of driving, the waste heat of the electric drive system is heated by the heat exchange medium in the heating circuit of the multi-media heat exchanger 1011a to heat the battery 401, thereby saving energy and increasing the driving range. At this time, the circulating water path is: first pump body → 3IN1 → MCU → multi-media heat exchanger → first four-way valve → second pump body → battery → water cooler → first four-way valve → four-way proportional valve → auxiliary water tank → four-way pipe → first pump body.

[0143] Example 6:

[0144] See also Fig. 9 ; Fig. 9 This is a connection topology diagram of the thermal management assembly in Example 6 provided in an embodiment of the present invention. The application scenario at this time is:

[0145] A cabin heating command is received, and the water temperature of the electric drive system is higher than a preset fourth temperature; optionally, the fourth temperature is 30° to 60°, preferably 55°.

[0146] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0147] The passages of the first pipeline 103a, the second pipeline 103b, and the third pipeline 103c are controlled so that the waste heat of the electric drive system is used to heat the passenger compartment through the heater core.

[0148] It can be understood that cabin heating can utilize the waste heat of the electric drive system to heat the heater core to save energy and increase cruising range. At this time, the circulating water path is: first pump body → 3IN1 → MCU → multi-media heat exchanger → first four-way valve → four-way proportional valve → PTC → heater core → third pump body → three-way valve → four-way pipe → auxiliary water tank → first pump body.

[0149] Example 7:

[0150] See also Fig.10 ; Fig.10 : is a connection topology diagram of the thermal management assembly in Example 7 provided in an embodiment of the present invention, and the application scenario at this time is:

[0151] A single passenger compartment heating command is received, and at this time the water temperature of the electric drive system is lower than the water outlet temperature of the heater core.

[0152] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0153] Control the passage of the third pipeline 103c, control the PTC heating to heat the passenger compartment through the heater core 1013a.

[0154] It can be understood that at this time, the circulating water path is: third pump body→three-way valve→PTC→heater core→third pump body.

[0155] Example 8:

[0156] See also Fig.11 ; Fig.11 This is a connection topology diagram of the thermal management assembly in Example 8 provided in an embodiment of the present invention. The application scenario at this time is:

[0157] The battery heating command and the cabin heating command are received at the same time.

[0158] In this application scenario, the controller is configured to control the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instructions and / or the vehicle temperature state, including:

[0159] The passages of the first pipeline 103a, the second pipeline 103b, and the third pipeline 103c are controlled, and the waste heat of the electric drive system is used to heat the battery 401, and the PTC is controlled to heat the cabin.

[0160] It can be understood that at this time the circulating water path is: battery water circuit, first pump body → 3IN1 → MCU → multi-media heat exchanger → first four-way valve → second pump body → battery → water cooler → first four-way valve → four-way proportional valve → four-way pipe → auxiliary water tank → first pump body, and the other warm air path is: third pump body → three-way valve → PTC → warm air core → third pump body.

[0161] In summary, Examples 1 to 8 above, the thermal management assembly has the following beneficial effects:

[0162] 1. In the drive thermal management system, when the electric vehicle is in high-load conditions, the peak power of the powertrain can be increased by using a multi-media heat exchanger to exchange heat with the refrigerant;

[0163] 2. Through the switching and connection of the multi-way valve and the flow control of the flow proportional valve, the heat generated by the electric drive system is used to heat the battery and the heater, which helps to increase the vehicle's mileage and reduce the vehicle cost;

[0164] 3. Through the switching and connection of the multi-way valve, the radiator and refrigerant are used for cooling in different temperature ranges of the battery, which reduces system energy consumption, saves electricity and improves product competitiveness.

[0165] Furthermore, those skilled in the art should understand that if the thermal management assembly provided in the embodiment of the present invention and all or part of the sub-modules involved are combined or replaced by fusion, simple change, mutual conversion, etc., such as the components are placed and moved; or the product they constitute is set as one piece; or a detachable design; all the combined components can form equipment / devices / systems with specific functions, and using such equipment / devices / systems to replace the corresponding components of the present invention also falls within the scope of protection of the present invention.

[0166] Those skilled in the art will appreciate that the control methods mentioned in the embodiments of the present application, such as the steps performed by the controller, can be provided as a system or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete module embodiment, or a combination of module and hardware embodiments. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0167] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0168] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A thermal management assembly for an electric vehicle, comprising a plurality of subsystems, wherein the subsystems include an electric drive thermal management system, a battery thermal management system and an air conditioning thermal management system, wherein: Also includes: Auxiliary water tank, used to store and provide heat exchange medium; A water system, connected to the heat exchange medium to form a cooling circuit through the electric drive thermal management system, the battery thermal management system and the air conditioning thermal management system, the water system including a plurality of multi-way valves for controlling the guidance of the heat exchange medium; A pump system, comprising a plurality of pumps connected to the water system, for conveying heat exchange medium; A first pipeline, connected to the auxiliary water tank and passing through the electric drive thermal management system; a second pipeline passing through the battery thermal management system; a third pipeline, passing through the air conditioning thermal management system; The first pipeline, the second pipeline and the third pipeline are connected in series and / or in parallel through a first four-way valve and a four-way proportional valve, so that the heat exchange medium passes through at least one of the first pipeline, the second pipeline and the third pipeline; The air conditioning thermal management system comprises: a PTC connected to the third pipeline; a heater core connected to the third pipeline; wherein the PTC is heated by the heater core; The controller, the electrical connection subsystem, the multi-way valve and the pump system are configured as follows: Receive application scenario instructions and vehicle temperature status; Controlling the working state of the subsystem and the guidance of the heat exchange medium according to application scenario instructions and / or vehicle temperature status; Wherein, controlling the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instruction and / or the vehicle temperature state includes: receiving a cabin heating command and the water temperature of the electric drive system is higher than a preset fourth temperature, controlling the first pipeline, the second pipeline, and the third pipeline to form a loop, and heating the passenger cabin through the heater core by using the waste heat of the electric drive system; receiving a single passenger compartment heating instruction, controlling the third pipeline passage to form a loop, controlling the PTC to work and heat, and transferring heat to the passenger compartment through the heater core; At the same time, the battery heating command and the cabin heating command are received, the first pipeline, the second pipeline, and the third pipeline are controlled to form a loop, and the waste heat of the electric drive system is used to heat the battery, and the PTC is controlled to heat the cabin.

2. The thermal management assembly according to claim 1, characterized in that: The pump system comprises: A first pump body, connected to the first pipeline, and used to control the first pipeline to transport the heat exchange medium; A second pump body, connected to the second pipeline, and used to control the second pipeline to transport the heat exchange medium; The third pump body is connected to the third pipeline and is used to control the third pipeline to transport the heat exchange medium.

3. The thermal management assembly according to claim 2, characterized in that: Also includes: The multi-way proportional valve is connected in series to the water system and is used to control the delivery ratio of the heat exchange medium in the water system.

4. The thermal management assembly according to claim 3, characterized in that: The electric drive thermal management system comprises: A radiator, connected in parallel to the water system; A multi-medium heat exchanger connected to the first pipeline and connected to the power assembly; Wherein, the multi-media heat exchanger acts on the motor in the powertrain to perform heat exchange with the motor.

5. The thermal management assembly according to claim 4, characterized in that: The battery thermal management system comprises: a water cooler, connected to the second pipeline and connected to the battery; The heat exchange medium is cooled by passing through the battery and the water cooler in sequence through the second pipeline.

6. The thermal management assembly according to claim 5, characterized in that: The subsystem also includes: The refrigerant system is used to produce refrigerant, and the refrigerant is connected to the water cooler and the multi-media heat exchanger through an expansion valve for heat exchange.

7. The thermal management assembly according to claim 6, characterized in that: The controlling the working state of the subsystem and the guidance of the heat exchange medium according to the application scenario instruction and / or the vehicle temperature state includes: When a battery cooling instruction is received and the vehicle temperature state is such that the highest battery temperature is successively greater than the electric drive water outlet temperature and the ambient temperature, only the first pipeline and the second pipeline are controlled to form a loop to cool the battery through the radiator; When a battery cooling instruction is received and the vehicle temperature state is that the maximum battery temperature is lower than the electric drive water outlet temperature, or a battery thermal balancing instruction is received, or an application scenario instruction is not received but the temperature difference between the maximum battery temperature and the minimum battery temperature is greater than or equal to a preset first temperature, the refrigerant system is controlled to start and the second pipeline path forms a loop; When the motor temperature is greater than a preset second temperature and the electric drive water inlet temperature is greater than a preset third temperature, the refrigerant system is controlled to start, the first pipeline and the radiator passage are controlled to form a loop, and the multi-medium heat exchanger is controlled to cool the motor; Upon receiving a battery heating instruction, the first pipeline and the second pipeline are controlled to form a loop, and a heat exchange medium in the loop is heated by a multi-medium heat exchanger to heat the battery.

8. An electric vehicle, characterized in that: It comprises a thermal management assembly according to any one of claims 1 to 7.

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