A new energy vehicle compact heat management system and method

Abstract

The application discloses a new energy automobile compact heat management system and method, and belongs to the technical field of heat management systems. The system comprises an air conditioning system and a passenger cabin system; the air conditioning system comprises a heat exchanger; the passenger cabin system comprises a battery pack, a heat exchanger, an HVAC and an engine; one side of the heat exchanger is connected with the heat exchanger through the first valve port and the third valve port of a first three-way valve, the other side of the heat exchanger is connected with the battery pack, and the heat exchanger and the battery pack are connected; the second valve port of the first three-way valve is communicated with one end of the HVAC, and the other end of the HVAC is connected between the heat exchanger and the battery pack; one end of the heat exchanger is connected with the HVAC through the eleventh valve port and the thirteenth valve port of a second valve, the twelfth valve of the second valve is connected with the engine, the engine is further connected with the other end of the HVAC, and the other end of the HVAC is connected with the heat exchanger. The application improves the utilization rate of parts in the heat management system, reduces the number of parts, optimizes the pipeline connection between the parts, and makes the degree of integration high.

Description

Technical Field

[0001] This invention relates to the field of thermal management system technology, and specifically to a compact thermal management system and method for new energy vehicles. Background Technology

[0002] With the increasing popularity of new energy vehicles, thermal management is necessary to address their range and thermal safety issues in winter and summer. Thermal management for new energy vehicles includes cabin heating in winter, cabin cooling in summer, battery cooling and heating, motor heat dissipation, and heat dissipation for power electronic components. The cold and heat sources, as well as other energy sources, of the air conditioning system in new energy vehicles all come from the battery system. For new energy vehicles, the air conditioning system directly affects not only driving comfort but also their driving range. Therefore, new energy vehicles must not only achieve cooling / heating functions but also consider system energy consumption.

[0003] The thermal management system of new energy vehicles typically includes battery pack thermal management, passenger compartment thermal management, engine thermal management, and electric motor drive thermal management. As can be seen, the thermal management system of new energy vehicles is a complex system with multiple coupled systems.

[0004] Existing thermal management systems for new energy vehicles often adopt a distributed subsystem architecture due to limitations imposed by the conversion of gasoline vehicles to electric vehicles and insufficient component integration capabilities. However, this distributed thermal management system architecture has the following drawbacks: 1. It has a large number of components that are scattered and difficult to arrange; 2. The components are usually connected by water-cooled pipes, resulting in pipe redundancy; 3. It has a low degree of integration, high cost, and heavy weight. Summary of the Invention

[0005] To address the problems of excessive number of parts and unreasonable pipe connections between parts in existing thermal management systems for new energy vehicles, resulting in low integration, this invention provides a compact thermal management system for new energy vehicles. This system improves the utilization rate of parts, reduces the number of parts, and optimizes pipe connections between parts, thus achieving a high degree of integration.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] In a first aspect, the present invention provides a compact thermal management system for new energy vehicles, including an air conditioning system and a passenger compartment system; the air conditioning system includes a heat exchanger; the passenger compartment system includes a battery pack, a heat exchanger, an HVAC system, and an engine; one side of the heat exchanger is connected to the heat exchanger via the first and third ports of a first three-way valve, and the other side of the heat exchanger is connected to the battery pack, with the heat exchanger and the battery pack connected; the second port of the first three-way valve is connected to one end of the HVAC system, and the other end of the HVAC system is connected between the heat exchanger and the battery pack; the heat exchanger is connected to one end of the HVAC system via the eleventh and thirteenth ports of a second three-way valve, and the twelfth port of the second three-way valve is connected to the engine, which is also connected to the other end of the HVAC system, and the other end of the HVAC system is connected to the heat exchanger.

[0008] As a further improvement of the present invention, a heat source system is also included; the heat source system includes a wind-heated PTC heater; the wind-heated PTC heater is installed on an HVAC system.

[0009] As a further improvement of the present invention, the air conditioning system further includes a compressor, a condenser and an expansion valve; the compressor is connected to one end of a heat exchanger, the other end of the heat exchanger is connected to an expansion valve, and a condenser is provided between the expansion valve and the compressor.

[0010] As a further improvement of the present invention, a first water pump is provided between the heat exchanger and the battery pack.

[0011] As a further improvement of the present invention, the other end of the HVAC is connected between the first water pump and the battery pack.

[0012] As a further improvement of the present invention, a second water pump is provided between the twelfth valve port of the second three-way valve and the engine.

[0013] As a further improvement of the present invention, the heat exchanger is a plate heat exchanger.

[0014] As a further improvement of the present invention, the heat exchanger is a Chiller heat exchanger.

[0015] Secondly, the present invention provides a cooling method for a compact thermal management system of a new energy vehicle, comprising: When the eleventh, twelfth, and thirteenth ports of the second three-way valve are closed, the engine does not work. When the first, second, and third ports of the first three-way valve are all connected, the heat exchanger, battery pack, heat exchanger, HVAC system, and the first three-way valve are connected, enabling simultaneous cooling of the battery pack and passenger compartment. When the second valve port of the first three-way valve is closed and the first and third valve ports are connected, the heat exchanger, battery pack, heat exchanger and the first three-way valve are connected to achieve cooling of the battery pack; When the third port of the first three-way valve is closed and the first and second ports are connected, the heat exchanger, HVAC system, and the first three-way valve are connected, thus cooling the passenger cabin.

[0016] Thirdly, the present invention provides a heating method for a compact thermal management system for new energy vehicles, comprising: The second port of the first three-way valve is closed, and the first and third ports are open. When the eleventh, twelfth and thirteenth ports of the second three-way valve are all connected, the heat exchanger, battery pack, heat exchanger, HVAC and engine are connected to achieve simultaneous heating of the battery pack and passenger compartment. When the eleventh and twelfth ports of the second three-way valve are connected, the heat exchanger, battery pack, heat exchanger, second three-way valve and engine are connected to achieve heating of the battery pack; When the twelfth and thirteenth ports of the second three-way valve are connected, the heat exchanger, battery pack, heat exchanger and HVAC are connected to achieve heating of the passenger cabin.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a compact thermal management system for new energy vehicles, which enables multiple components to be used simultaneously in both cooling and heating states of the battery pack and passenger compartment. This improves the utilization rate of components. Compared with traditional thermal management systems, the number of components is reduced. Due to fewer components, the arrangement of each component can be more compact, improving space utilization. Moreover, because of the reduced number of parts and the more compact arrangement, the number and length of pipes between each component are reduced. The optimized pipe layout avoids management redundancy. This achieves an optimized overall vehicle thermal management layout architecture, improves the degree of integration, and reduces costs.

[0018] Furthermore, this invention eliminates the traditional combination of HVAC, evaporator, and expansion valve, and adopts a liquid-cooled and liquid-heated HVAC to meet the adaptability requirements of the passenger cabin, thus reducing the number of components.

[0019] Furthermore, the present invention employs a chiller heat exchanger, which simultaneously meets the cooling requirements of the battery pack and the passenger cabin, thereby improving component utilization. Attached Figure Description

[0020] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a schematic diagram of a compact thermal management system for new energy vehicles according to the present invention; Figure 2This is a schematic diagram of the coolant flow direction in the battery pack and passenger cabin cooling mode in an embodiment of the present invention; Figure 3 This is a schematic diagram of the coolant flow direction in the battery pack and passenger compartment heating mode in an embodiment of the present invention.

[0021] In the diagram: 1 is the compressor; 2 is the condenser; 3 is the expansion valve; 4 is the heat exchanger; 5 is the first water pump; 6 is the battery pack; 7 is the heat exchanger; 8 is the first three-way valve; 81 is the first valve port; 82 is the second valve port; 83 is the third valve port; 9 is HVAC (Heating, Ventilation and Air Conditioning); 10 is the air-heated PTC heater; 11 is the second three-way valve; 111 is the eleventh valve port; 112 is the twelfth valve port; 113 is the thirteenth valve port; 12 is the second water pump; 13 is the engine. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] The present invention discloses a compact thermal management system for new energy vehicles, including an air conditioning system, a heat source system, a battery pack 6, and a passenger cabin system.

[0026] like Figure 1As shown, the air conditioning system includes a compressor 1, a condenser 2, an expansion valve 3, and a heat exchanger 4. The compressor 1, condenser 2, expansion valve 3, and heat exchanger 4 are connected sequentially via piping. The heat exchanger 4 is a chiller heat exchanger.

[0027] The heat source system includes an air-heated PTC heater 10.

[0028] The passenger cabin system includes a battery pack 6, a water pump, a heat exchanger 7, a three-way valve, an HVAC system 9, and an engine 13.

[0029] The water pumps include a first water pump 5 and a second water pump 12.

[0030] The heat exchanger 4 is also connected to the first valve port 81 of the first three-way valve 8 and the first water pump 5 via pipes; the second valve port of the first three-way valve 8 is connected to the heat exchanger 7, the heat exchanger 7 is connected to the battery pack 6 via pipes, and the battery pack 6 is connected to the first water pump 5 via pipes. The third valve port 83 of the first three-way valve 8 is connected to the HVAC 9 via a pipe, the HVAC 9 is connected to the air-heated PTC heater 10, and the HVAC 9 is connected to the pipe between the battery pack 6 and the first water pump 5 via a pipe.

[0031] The eleventh port 111 of the second three-way valve 11 is connected to the heat exchanger 7 via a pipe. The twelfth port 112 of the second three-way valve 11 is connected to the second water pump 12 via a pipe. The second water pump 12 is connected to the engine 13 via a pipe. The engine 13 is connected to the HVAC 9 via a pipe. The thirteenth port 113 of the second three-way valve 11 is connected to the HVAC 9 via a pipe. The HVAC 9 is connected to the heat exchanger 7 via a pipe.

[0032] The first water pump 5 and the second water pump 12 are electronic water pumps. The heat exchanger 7 is a plate heat exchanger.

[0033] The passenger cabin system includes a passenger cabin cooling circuit and a passenger heating circuit. Different circuits are activated according to the needs of the passenger cabin.

[0034] like Figure 2 As shown, the passenger cooling circuit includes a heat exchanger 4, a first water pump 5, a battery pack 6, a first three-way valve 8, and an HVAC unit 9.

[0035] When the first valve port 81 and the third valve port 83 of the first three-way valve 8 are connected, the heat exchanger 4, the first water pump 5, the battery pack 6, and the first three-way valve 8 are connected in sequence through pipelines to form a battery pack cooling circuit. When the first valve port 81 and the second valve port 82 of the first three-way valve 8 are connected, the heat exchanger 4, the first water pump 5, the HVAC 9, and the first three-way valve 8 are connected in sequence through pipelines to form a passenger cabin cooling circuit. When the first valve port 81, the second valve port 82, and the third valve port 83 of the first three-way valve 8 are all connected, the heat exchanger 4, the first water pump 5, the battery pack 6, the HVAC 9, and the first three-way valve 8 are connected through pipelines to form a battery pack and passenger cabin cooling circuit.

[0036] like Figure 3 As shown, the passenger cabin heating circuit includes an engine 13, a second water pump 12, a second three-way valve 11, a heat exchanger 7, an HVAC 9, and a wind-heated PTC heater 10.

[0037] The passenger cabin heating circuit uses the engine as the heat source system. When the eleventh valve port 111 and the twelfth valve port 112 of the second three-way valve 11 are connected, the engine 13, the second water pump 12, the second three-way valve 11, and the heat exchanger 7 are connected in sequence through pipelines to form the battery pack heating circuit. When the twelfth valve port 112 and the thirteenth valve port 113 of the second three-way valve 11 are connected, the engine 13, the second water pump 12, the second three-way valve 11, and the HVAC9 are connected in sequence through pipelines to form the passenger cabin heating circuit. When the eleventh valve port 111, the twelfth valve port 112, and the thirteenth valve port 113 of the second three-way valve 11 are all connected, the engine 13, the second water pump 12, the second three-way valve 11, the heat exchanger 7, and the HVAC9 are connected through pipelines to form the battery pack and passenger cabin heating circuit.

[0038] The air conditioning system and passenger cabin cooling circuit exchange heat at heat exchanger 4. The heat source system and passenger cabin heating circuit exchange heat at heat exchangers 7 and HVAC 9. The air-heated PTC heater 10 is the heat source system, and HVAC 9 and the air-heated PTC heater 10 also constitute the passenger cabin heating circuit. This improves the utilization rate of each component, reduces the number of parts, allows for centralized arrangement of parts, reduces piping redundancy, achieves a high degree of integration, and reduces costs.

[0039] Heat exchanger 4 is a Chiller heat exchanger, and the first water pump 5 and the second water pump 12 are electric water pumps. HVAC 9 is a liquid-cooled and liquid-heated HVAC system.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] In this embodiment, the present invention provides a compact thermal management system for new energy vehicles, which includes multiple working modes under different needs. The following will describe each mode in detail.

[0042] Example 1: Battery Pack 6 and Passenger Cabin Cooling Mode like Figure 2 As shown, when the battery pack 6 and passenger cabin need cooling, the compressor 1 operates, and the refrigerant evaporates and absorbs heat at the heat exchanger 4, reducing the temperature of the coolant on the cooling circuit side of the battery pack 6 and passenger cabin. Through the pumping action of the first water pump 5, the low-temperature coolant is pumped into the battery pack side branch and the HVAC9 side branch, where heat exchange is completed in the internal flow channel of the battery pack 6 and the internal warm air core of the HVAC9, respectively, to achieve the purpose of cooling the battery pack 6 and passenger cabin. This is the cooling mode of the battery pack 6 and passenger cabin.

[0043] When only the first valve port 81 and the third valve port 83 of the first three-way valve 8 are connected, the coolant flows only through the branch on the battery pack 6 side, which is the battery pack 6 cooling mode; when only the first valve port 81 and the second valve port 82 of the first three-way valve 8 are connected, the coolant flows only through the branch on the HVAC9 side, which is the passenger cabin cooling mode.

[0044] Example 2: Battery Pack 6 and Passenger Cabin Heating Mode like Figure 3 As shown, with engine 13 as the heat source system, when battery pack 6 and passenger compartment need to be heated, high-temperature coolant circulates in the heating circuit of battery pack 6 and passenger compartment through the second water pump 12, and is split at the second three-way valve 11, entering the side branch of heat exchanger 7 and the side branch of HVAC9, and completing heat exchange at the low-temperature circuit side of heat exchanger 7 and the warm air core inside HVAC9 respectively, to achieve the purpose of heating battery pack 6 and passenger compartment. At this time, it is the heating mode of battery pack 6 and passenger compartment.

[0045] When only the eleventh valve port 111 and the twelfth valve port 112 of the second three-way valve 11 are connected, the coolant flows only through the branch on the heat exchanger 7 side, which is the heating mode of the battery pack 6; when only the twelfth valve port 112 and the thirteenth valve port 113 of the second three-way valve 11 are connected, the coolant flows only through the branch on the HVAC9 side, which is the heating mode of the passenger cabin.

[0046] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

[0047] The above content provides a further detailed description of the present invention. It should not be construed that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection of the present invention as defined by the submitted claims.

Claims

1. A compact thermal management system for new energy vehicles, characterized in that, Including air conditioning systems and passenger cabin systems; The air conditioning system includes a heat exchanger (4); The passenger cabin system includes a battery pack (6), a heat exchanger (7), an HVAC system (9), and an engine (13). One side of the heat exchanger (4) is connected to the heat exchanger (7) through the first valve port (81) and the third valve port (83) of the first three-way valve (8), and the other side of the heat exchanger (4) is connected to the battery pack (6). The heat exchanger (7) and the battery pack (6) are connected. The second valve port (82) of the first three-way valve (8) is connected to one end of the HVAC (9), and the other end of the HVAC (9) is connected between the heat exchanger (4) and the battery pack (6). The heat exchanger (7) is connected to one end of the HVAC (9) through the eleventh valve port (111) and the thirteenth valve port (113) of the second three-way valve (11). The twelfth valve port (112) of the second three-way valve (11) is connected to the engine (13). The engine (13) is also connected to the other end of the HVAC (9). The other end of the HVAC (9) is connected to the heat exchanger (7).

2. The compact thermal management system for new energy vehicles according to claim 1, characterized in that, It also includes the heat source system; The heat source system includes a wind-heated PTC heater (10); The air-heated PTC heater (10) is installed on the HVAC (9).

3. The compact thermal management system for new energy vehicles according to claim 1, characterized in that, The air conditioning system also includes a compressor (1), a condenser (2), and an expansion valve (3). The compressor (1) is connected to one end of the heat exchanger (4), and the other end of the heat exchanger (4) is connected to the expansion valve (3). A condenser (2) is provided between the expansion valve (3) and the compressor (1).

4. A compact thermal management system for new energy vehicles according to claim 1, characterized in that, A first water pump (5) is provided between the heat exchanger (4) and the battery pack (6).

5. A compact thermal management system for new energy vehicles according to claim 4, characterized in that, The other end of the HVAC (9) is connected between the first water pump (5) and the battery pack (6).

6. A compact thermal management system for new energy vehicles according to claim 1, characterized in that, A second water pump (12) is provided between the twelfth valve port (112) of the second three-way valve (11) and the engine (13).

7. A compact thermal management system for new energy vehicles according to claim 1, characterized in that, The heat exchanger (7) is a plate heat exchanger.

8. A compact thermal management system for new energy vehicles according to claim 1, characterized in that, The heat exchanger (4) is a Chiller heat exchanger.

9. A cooling method for a compact thermal management system for a new energy vehicle, based on the compact thermal management system for a new energy vehicle according to any one of claims 1 to 6, characterized in that, include: When the eleventh valve port (111), twelfth valve port (112), and thirteenth valve port (113) of the second three-way valve (11) are closed, the engine (13) does not work. When the first valve port (81), second valve port (82), and third valve port (83) of the first three-way valve (8) are all connected, the heat exchanger (4), battery pack (6), heat exchanger (7), HVAC (9), and first three-way valve (8) are connected, so as to achieve simultaneous cooling of the battery pack (6) and passenger cabin. When the second valve port (82) of the first three-way valve (8) is closed, and the first valve port (81) and the third valve port (83) are connected, the heat exchanger (4), the battery pack (6), the heat exchanger (7) and the first three-way valve (8) are connected to achieve cooling of the battery pack (6); When the third valve port (83) of the first three-way valve (8) is closed, and the first valve port (81) and the second valve port (82) are connected, the heat exchanger (4), HVAC (9) and the first three-way valve (8) are connected to achieve cooling of the passenger cabin.

10. A heating method for a compact thermal management system for a new energy vehicle, based on the compact thermal management system for a new energy vehicle according to any one of claims 1 to 6, characterized in that, include: The second valve port (82) of the first three-way valve (8) is closed, and the first valve port (81) and the third valve port (83) are open. When the eleventh valve port (111), the twelfth valve port (112) and the thirteenth valve port (113) of the second three-way valve (11) are all connected, the heat exchanger (4), the battery pack (6), the heat exchanger (7), the HVAC (9) and the engine (13) are connected, so as to achieve simultaneous heating of the battery pack and the passenger compartment. When the eleventh valve port (111) and the twelfth valve port (112) of the second three-way valve (11) are connected, the heat exchanger (4), the battery pack (6), the heat exchanger (7), the second three-way valve (11) and the engine (13) are connected to heat the battery pack (6); When the twelfth valve port (112) and the thirteenth valve port (113) of the second three-way valve (11) are connected, the heat exchanger (4), the battery pack (6), the heat exchanger (7) and the HVAC (9) are connected to achieve heating of the passenger cabin.

Images