Electric commercial vehicle thermal management system

Abstract

The utility model discloses an electric commercial vehicle thermal management system, which comprises a six-way valve, and a motor cooling system, a passenger compartment air-conditioning system, a battery thermal management system and a main air-conditioning system which are connected with the six-way valve, and the passenger compartment air-conditioning system and the battery thermal management system share one main air-conditioning system; the auxiliary cooling system is connected with the battery heat management system, can meet the requirements of different configurations for refrigeration and heating performance, improves the generalization rate of parts, and can be expanded when the heat exchange quantity requirement is huge; the system realizes high performance and expansibility, realizes high generalization rate of parts, and saves energy.

Description

Technical Field

[0001] The utility model relates to a thermal management system, in particular to a thermal management system for electric commercial vehicles. Background Art

[0002] As a main core system of new energy vehicles, the thermal management system is used to overall manage the heat of the whole vehicle and conduct heat management for components such as the passenger compartment, battery, motor, and electronic control. Currently, the vast majority of commercial vehicle thermal management systems on the market are three independent systems (motor cooling system, passenger compartment air conditioning system, battery thermal management system); commercial vehicles are developing towards large battery capacity, fast charging or super fast charging, which puts very high requirements on the refrigeration and heating performance of the thermal management system. At the same time, due to different vehicle usage scenarios and different technical directions such as battery swapping, vehicles on the same platform will have different configurations. For example, there are two models on a certain platform: a. 400 kWh battery, 1C charging and battery swapping available; b. 600 kWh battery, 2C fast charging. To meet the design and development of the above models, it is necessary to design a high-performance and expandable platform-based general thermal management system to solve the above problems. Summary of the Utility Model

[0003] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a thermal management system for electric commercial vehicles, which realizes high performance and expandability, and has a high generalization rate of components and energy conservation.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a thermal management system for electric commercial vehicles, comprising: a six-way valve and a motor cooling system, a passenger compartment air conditioning system, a battery thermal management system, and a main air conditioning system connected to the six-way valve. The passenger compartment air conditioning system and the battery thermal management system share a main air conditioning system.

[0005] Further, three groups of connectors are provided on the six-way valve, and the three groups of connectors are respectively connected to the motor cooling system, the passenger compartment air conditioning system, and the battery thermal management system. Two connectors are provided in each group of connectors.

[0006] Further, the motor cooling system comprises: an electromagnetic valve, a motor, a motor cooling water pump, a motor cooling three-way valve, and a motor cooling radiator. One connector of the six-way valve for installing the motor cooling system is connected to the electromagnetic valve, the motor, the motor cooling water pump, the motor cooling three-way valve, and the motor cooling radiator in sequence through a pipeline, and then connected to the other connector of the six-way valve for installing the motor cooling system. The motor cooling three-way valve is connected in parallel with the motor cooling radiator through a pipeline.

[0007] Further, the battery thermal management system includes: a battery water-cooled plate, a battery water PTC, a battery water pump, and a battery plate heat exchanger. One joint of the six-way valve installed in the battery thermal management system is connected to the battery water-cooled plate, the battery water PTC, the battery water pump, the battery plate heat exchanger, and the other joint of the six-way valve installed in the battery thermal management system through pipelines in sequence.

[0008] Further, the passenger compartment air conditioning system includes: a passenger compartment main water pump, a passenger compartment three-way valve A, a passenger compartment radiator, a water-cooled condenser, a passenger compartment three-way valve B, a heater core, and a passenger compartment auxiliary water pump. One joint of the six-way valve installed in the passenger compartment air conditioning system is connected to the passenger compartment main water pump, the passenger compartment three-way valve A, the passenger compartment radiator, the water-cooled condenser, the passenger compartment three-way valve B, and the other joint of the six-way valve installed in the passenger compartment air conditioning system through pipelines in sequence. Another interface of the passenger compartment three-way valve A is connected in parallel with the passenger compartment radiator through a pipeline. Another interface of the passenger compartment three-way valve B is connected to the other joint of the six-way valve installed in the passenger compartment air conditioning system through the heater core and the passenger compartment auxiliary water pump.

[0009] Further, the main air conditioning system includes: a main compressor, a main gas-liquid separator, a main evaporator, EXVA, and EXVB. One interface of the main compressor is connected to the main gas-liquid separator, the main evaporator, EXVA, the water-cooled condenser in the passenger compartment air conditioning system, and the other interface of the main compressor through pipelines in sequence. The battery plate heat exchanger is connected to EXVB through a pipeline and is connected in parallel with the main evaporator and EXVA.

[0010] Further, it also includes: a secondary cooling system, and the secondary cooling system is connected to the battery thermal management system.

[0011] Further, the secondary cooling system is connected in parallel with the battery water-cooled plate.

[0012] Further, the secondary cooling system includes: a secondary cooling water pump, a secondary cooling water PTC, a secondary cooling plate heat exchanger, EXVC, a secondary cooling condenser, a secondary compressor, and a secondary gas-liquid separator. One interface of the battery water-cooled plate is connected to the secondary cooling water pump, the secondary cooling water PTC, the secondary cooling plate heat exchanger, and the other interface of the battery water-cooled plate through pipelines in sequence. One interface of the secondary cooling plate heat exchanger is connected to EXVC, the secondary cooling condenser, the secondary compressor, the secondary gas-liquid separator, and the other interface of the secondary cooling plate heat exchanger through pipelines in sequence.

[0013] Furthermore, the auxiliary cooling system is assembled into an integrated product from components. The beneficial effects of the present utility model are as follows: The thermal management system of the electric commercial vehicle is a disassemblable and assemblable thermal management system. While realizing various thermal management modes, the components can also be designed with a disassemblable and assemblable design scheme, which can solve the following problems: 1. It can meet the refrigeration and heating performance requirements of different configurations; 2. Improve the generalization rate of components; 3. When the heat exchange demand is huge, it can be expanded, that is, the auxiliary cooling system can be increased. This system realizes high performance and scalability, with a high generalization rate of components and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] In the figure: 1. Six-way valve; 2. Electric control valve; 3. Motor; 4. Motor cooling water pump; 5. Motor cooling three-way valve; 6. Motor cooling radiator; 7. Battery water-cooled plate; 8. Battery water PTC; 9. Battery water pump; 10. Battery plate heat exchanger; 11. Main water pump for the passenger compartment; 12. Three-way valve A for the passenger compartment; 13. Passenger compartment radiator; 14. Water-cooled condenser; 15. Three-way valve B for the passenger compartment; 16. Warm air core; 17. Auxiliary water pump for the passenger compartment; 18. Main compressor; 19. Main gas-liquid separator; 20. Main evaporator; 21. EXVA; 22. EXVB; 23. Auxiliary cooling water pump; 24. Auxiliary cooling water PTC; 25. Auxiliary cooling plate heat exchanger; 26. EXVC; 27. Auxiliary cooling condenser; 28. Auxiliary compressor; 29. Auxiliary gas-liquid separator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0018] As Figure 1 shown, a thermal management system for an electric commercial vehicle includes a six-way valve 1 and a motor 3 cooling system, a passenger compartment air-conditioning system, a battery thermal management system, and a main air-conditioning system connected to the six-way valve 1. The passenger compartment air-conditioning system and the battery thermal management system share a main air-conditioning system.

[0019] The electric commercial vehicle thermal management system further includes: a secondary cooling system, which is connected to the battery thermal management system. The secondary cooling system is assembled into an integrated product from components. When the demand for refrigeration and heating performance increases due to fast battery charging configuration, it is increased. The secondary cooling system is equipped on the whole vehicle as a vehicle component through specific product design, and can also be used as an independent device.

[0020] The six-way valve 1 is provided with three groups of connectors, which are respectively connected to the motor 3 cooling system, the passenger compartment air-conditioning system, and the battery thermal management system. Each group of connectors has two connectors. Connectors 1 and 2 are used to connect the motor 3 cooling system, connectors 3 and 4 are used to connect the passenger compartment air-conditioning system, and connectors 5 and 6 are used to connect the passenger compartment air-conditioning system.

[0021] The motor 3 cooling system includes: an electromagnetic valve 2, a motor 3, a motor 3 cooling water pump, a motor 3 cooling three-way valve, and a motor 3 cooling radiator. The 1 connector of the six-way valve 1 installed in the motor 3 cooling system is connected to the electromagnetic valve 2, the motor 3, the motor 3 cooling water pump, the motor 3 cooling three-way valve, and the motor 3 cooling radiator in sequence through a pipeline, and then connected to the 2 connector of the six-way valve 1 installed in the motor 3 cooling system. The motor 3 cooling three-way valve is connected in parallel with the motor 3 cooling radiator through a pipeline.

[0022] The battery thermal management system includes: a battery water-cooled plate 7, a battery water PTC 8, a battery water pump 9, and a battery plate heat exchanger 10. The 6 connector of the six-way valve 1 installed in the battery thermal management system is connected to the battery water-cooled plate 7, the battery water PTC 8, the battery water pump 9, and the battery plate heat exchanger 10 in sequence through a pipeline, and then connected to the 5 of the six-way valve 1 installed in the battery thermal management system.

[0023] The passenger compartment air-conditioning system includes: a passenger compartment main water pump 11, a passenger compartment three-way valve A 12, a passenger compartment radiator 13, a water-cooled condenser 14, a passenger compartment three-way valve B 15, a heater core 16, and a passenger compartment secondary water pump 17. The 3 connector of the six-way valve 1 installed in the passenger compartment air-conditioning system is connected to the passenger compartment main water pump 11, the passenger compartment three-way valve A 12, the passenger compartment radiator 13, the water-cooled condenser 14, the passenger compartment three-way valve B 15, and the 4 connector of the six-way valve 1 installed in the passenger compartment air-conditioning system in sequence through a pipeline. The other interface of the passenger compartment three-way valve A 12 is connected in parallel with the passenger compartment radiator 13 through a pipeline. The other interface of the passenger compartment three-way valve B 15 is connected to the 4 connector of the six-way valve 1 installed in the passenger compartment air-conditioning system through the heater core 16 and the passenger compartment secondary water pump 17.

[0024] The main air-conditioning system includes: a main compressor 18, a main gas-liquid separator 19, a main evaporator 20, EXVA 21, EXVB 22. One interface of the main compressor 18 is connected to the main gas-liquid separator 19, the main evaporator 20, EXVA 21, the water-cooled condenser 14 in the occupant compartment air-conditioning system, and the other interface of the main compressor 18 in sequence through pipelines. The battery plate heat exchanger 10 is connected to EXVB 22 through a pipeline and is in parallel with the main evaporator 20 and EXVA 21.

[0025] The auxiliary cooling system is in parallel with the battery water-cooling plate 7.

[0026] The auxiliary cooling system includes: an auxiliary cooling water pump 23, an auxiliary cooling water PTC 24, an auxiliary cooling plate heat exchanger 25, EXVC 26, an auxiliary cooling condenser 27, an auxiliary compressor 28, and an auxiliary gas-liquid separator 29. One interface of the battery water-cooling plate 7 is connected to the auxiliary cooling water pump 23, the auxiliary cooling water PTC 24, the auxiliary cooling plate heat exchanger 25, and the other interface of the battery water-cooling plate 7 in sequence through pipelines. One interface of the auxiliary cooling plate heat exchanger 25 is connected to EXVC 26, the auxiliary cooling condenser 27, the auxiliary compressor 28, the auxiliary gas-liquid separator 29, and the other interface of the auxiliary cooling plate heat exchanger 25 in sequence through pipelines.

[0027] There are 4 interfaces on each of the water-cooled condenser 14, the auxiliary cooling plate heat exchanger 25, and the battery plate heat exchanger 10.

[0028] The switching of each mode of thermal management is achieved by controlling the on-off of the interfaces of the six-way valve 1. The modes are as follows:

[0029]

[0030] Cab warming process:

[0031] 1. The battery water PTC 8 warms up and enters mode 4. The refrigerant circuit does not work. The six-way valve 1 enters mode 4. The heat of the battery water PTC 8 enters the heater core 16 through the water valve to heat the occupant compartment.

[0032] 2. The heat pump warms up and the refrigerant circuit works.

[0033] a. The six-way valve 1 enters mode one, and the water-cooled condenser 14 uses the electric control waste heat of the motor 3 to supply energy for the heat pump.

[0034] b. The six-way valve 1 enters mode two, and the water-cooled condenser 14 uses the electric control and battery waste heat of the motor 3 to supply energy for the heat pump.

[0035] c. The six-way valve 1 enters mode three, and the water-cooled condenser 14 uses the heat exchange between the occupant compartment radiator 13 and the air to supply energy for the heat pump.

[0036] d. The six-way valve 1 enters mode four, and the water-cooled condenser 14 uses the battery waste heat to supply energy for the heat pump.

[0037] Battery heating process:

[0038] 1. The battery water PTC8 heats up and enters Mode 3. The refrigerant circuit does not work, and the battery water PTC8 heats the battery.

[0039] 2. The waste heat of the motor 3 heats up and enters Mode 5. The waste heat of the motor 3 directly enters the battery to heat the battery.

[0040] Cab and battery cooling process:

[0041] The refrigerant circuit works. The six-way valve 1 enters Mode 3 to exchange heat with the air through the occupant compartment radiator 13, cools the occupant compartment through the main evaporator 20, and cools the battery through the battery plate heat exchanger 10.

[0042] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric commercial vehicle thermal management system, characterized in that: include: The six-way valve and the motor cooling system, the passenger compartment air-conditioning system, the battery thermal management system, and the main air-conditioning system connected to the six-way valve. The passenger compartment air-conditioning system and the battery thermal management system share a main air-conditioning system.

2. The thermal management system for an electric commercial vehicle according to claim 1, characterized in that: The six-way valve is provided with three groups of connectors, which are respectively connected to the motor cooling system, the passenger compartment air conditioning system, and the battery thermal management system, and each group of connectors is provided with two connectors.

3. The thermal management system for an electric commercial vehicle according to claim 2, characterized in that: The motor cooling system includes: an electric control valve, a motor, a motor cooling water pump, a motor cooling three-way valve, and a motor cooling radiator. A joint of the six-way valve installed in the motor cooling system is connected in sequence through a pipeline to the electric control valve, the motor, the motor cooling water pump, the motor cooling three-way valve, the motor cooling radiator, and another joint of the six-way valve installed in the motor cooling system. The motor cooling three-way valve is connected in parallel with the motor cooling radiator through a pipeline.

4. The thermal management system for an electric commercial vehicle according to claim 2, characterized in that: The battery thermal management system includes: a battery water cooling plate, a battery water PTC, a battery water pump, and a battery plate heat exchanger. A six-way valve is installed on a joint of the battery thermal management system, which is connected in sequence through a pipeline to the battery water cooling plate, the battery water PTC, the battery water pump, the battery plate heat exchanger, and another joint of the battery thermal management system installed on the six-way valve.

5. The thermal management system for an electric commercial vehicle according to claim 4, characterized in that: The passenger compartment air-conditioning system includes: a passenger compartment main water pump, a passenger compartment three-way valve A, a passenger compartment radiator, a water-cooled condenser, a passenger compartment three-way valve B, a heater core, and a passenger compartment auxiliary water pump. A joint of the six-way valve installed in the passenger compartment air-conditioning system is connected in sequence to the passenger compartment main water pump, the passenger compartment three-way valve A, the passenger compartment radiator, the water-cooled condenser, the passenger compartment three-way valve B, and another joint of the six-way valve installed in the passenger compartment air-conditioning system through a pipeline. Another interface of the passenger compartment three-way valve A is connected in parallel with the passenger compartment radiator through a pipeline, and another interface of the passenger compartment three-way valve B is connected to another interface of the passenger compartment air-conditioning system installed in the six-way valve through the heater core and the passenger compartment auxiliary water pump.

6. The thermal management system for an electric commercial vehicle according to claim 5, characterized in that: The main air-conditioning system includes: a main compressor, a main gas-liquid separator, a main evaporator, EXVA, and EXVB. One interface of the main compressor is connected to the main gas-liquid separator, the main evaporator, EXVA, the water-cooled condenser in the passenger compartment air-conditioning system, and another interface of the main compressor in sequence through a pipeline. The battery plate heat exchanger is connected to EXVB through a pipeline and is connected in parallel with the main evaporator and EXVA.

7. The thermal management system for an electric commercial vehicle according to claim 5, characterized in that: Also includes: A secondary cooling system is connected to the battery thermal management system.

8. The thermal management system for an electric commercial vehicle according to claim 7, characterized in that: The auxiliary cooling system is connected in parallel with the battery water cooling plate.

9. The thermal management system for an electric commercial vehicle according to claim 8, characterized in that: The auxiliary cooling system includes: an auxiliary cooling water pump, an auxiliary cooling water PTC, an auxiliary cooling plate heat exchanger, EXVC, an auxiliary cooling condenser, an auxiliary compressor, and an auxiliary gas-liquid separator. One interface of the battery water cooling plate is connected to the auxiliary cooling water pump, the auxiliary cooling water PTC, the auxiliary cooling plate heat exchanger, and another interface of the battery water cooling plate in sequence through a pipeline. One interface of the auxiliary cooling plate heat exchanger is connected to the EXVC, the auxiliary cooling condenser, the auxiliary compressor, the auxiliary gas-liquid separator, and another interface of the auxiliary cooling plate heat exchanger in sequence through a pipeline.

10. The thermal management system for an electric commercial vehicle according to claim 1, characterized in that: The auxiliary cooling system is an integrated product assembled from components.

Images