A range-extending pure electric vehicle cooling system

Abstract

The utility model provides a range -extended type pure electric vehicle cooling system, including electric compressor cooling unit, range extender cooling unit and battery cooling unit, is equipped with heat exchange unit between electric compressor cooling unit, range extender cooling unit and battery cooling unit, heat exchange unit can guarantee that range extender has optimal vibration noise level, can reach whole car NVH performance requirement, and range extender starting produces heat can supply battery cooling unit temperature adjustment, can guarantee battery system efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of thermal management of new energy vehicles. Specifically, this utility model relates to a cooling system for range-extended pure electric vehicles. Background Technology

[0002] NVH is an abbreviation for Noise, Vibration, and Harshness, a comprehensive issue measuring automotive manufacturing quality. Vehicle NVH is a major concern for international automotive manufacturers and parts suppliers, accounting for approximately one-third of vehicle malfunctions. The automotive market's demands for NVH performance are becoming increasingly stringent. With the rapid development of automotive technology, people are placing higher and higher demands on driving comfort. Regarding the cooling systems of new energy vehicles, their design is often based on functionality. However, for range-extended electric vehicles (REEVs), the addition of a range extender compared to traditional electric vehicles leads to a decrease in overall NVH performance.

[0003] To address the aforementioned issues, patent application number 2021107766454 discloses a thermal management system for a range-extended hybrid electric vehicle, comprising an engine cooling water circuit, a heater water circuit, an electric motor cooling oil circuit, an air conditioning cooling circuit, and a battery cooling water circuit. The engine cooling water circuit and the heater water circuit are connected in series or operate independently via a four-way reversing valve. The engine cooling water circuit and the electric motor cooling oil circuit exchange heat through a second heat exchanger, the heater water circuit and the battery cooling water circuit exchange heat through a first heat exchanger, and the air conditioning cooling circuit and the battery cooling water circuit exchange heat through a chiller. However, this system fails to resolve the aforementioned problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, a cooling system for range-extended pure electric vehicles is provided that can ensure the range extender has the optimal vibration and noise level, meet the NVH performance requirements of the whole vehicle, provide the battery cooling unit with the heat generated when the range extender starts to regulate the temperature, and ensure the efficiency of the battery system. Summary of the Invention

[0005] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a cooling system for range-extended electric vehicles that ensures optimal vibration and noise levels in the range extender, meets the overall vehicle NVH performance requirements, allows the heat generated during range extender startup to be used for battery cooling unit temperature regulation, and guarantees battery system efficiency. To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a cooling system for a range-extended pure electric vehicle, which includes an electric compressor cooling unit, a range extender cooling unit, and a battery cooling unit, with a heat exchange unit provided between the electric compressor cooling unit, the range extender cooling unit, and the battery cooling unit.

[0006] The range-extended pure electric vehicle cooling system provided by this utility model may also have the following features: the electric compressor cooling unit includes an electric compressor cooling circuit; the range extender cooling unit includes a range extender cooling circuit; and the battery cooling unit includes a battery cooling circuit.

[0007] The range-extended pure electric vehicle cooling system provided by this utility model may also have the following features: the heat exchange unit includes a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, and a fifth heat exchanger. The first heat exchanger is disposed on the range extender cooling circuit, the second heat exchanger is disposed on the battery cooling circuit and located to one side of the first heat exchanger; the fifth heat exchanger is disposed on the electric compressor cooling circuit, the third heat exchanger is disposed on the range extender cooling circuit and located to one side of the fifth heat exchanger, and the fourth heat exchanger is disposed on the battery cooling circuit and located to one side of the fifth heat exchanger.

[0008] The range-extended pure electric vehicle cooling system provided by this utility model may also have the following features: the heat exchange unit further includes a first heat exchange branch, the end of the first heat exchange branch is connected to the range extender cooling circuit, a first switching valve is provided on the first heat exchange branch, and the first switching valve and the first heat exchanger are connected in parallel.

[0009] The range-extended pure electric vehicle cooling system provided by this utility model may also have the following features: the heat exchange unit further includes a second heat exchange branch, the end of which is connected to the battery cooling circuit, and a second switching valve is provided on the second heat exchange branch. The second switching valve and the second heat exchanger are connected in parallel.

[0010] The range-extended pure electric vehicle cooling system provided by this utility model may also include an expansion shut-off valve, which is installed on the electric compressor cooling circuit, the range extender cooling circuit, and the battery cooling circuit.

[0011] The technical effects of this utility model are as follows: The range-extended pure electric vehicle cooling system provided by this utility model includes an electric compressor cooling unit, a range extender cooling unit, and a battery cooling unit. A heat exchange unit is provided between the electric compressor cooling unit, the range extender cooling unit, and the battery cooling unit. The heat exchange unit can ensure that the range extender has the optimal vibration and noise level and can meet the NVH performance requirements of the whole vehicle. The heat generated by the range extender during startup can be used to regulate the temperature of the battery cooling unit, which can ensure the efficiency of the battery system. Attached Figure Description

[0012] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the cooling system of a range-extended pure electric vehicle in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the cooling system of a range-extended pure electric vehicle in an embodiment of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of a battery temperature management method in an embodiment of this utility model; Figure 4 This is a schematic diagram of the method for temperature management of the range extender in an embodiment of this utility model.

[0013] The following are labeled in the diagram: Electric compressor cooling unit-10, electric compressor cooling circuit-11, range extender cooling unit-20, range extender cooling circuit-21, battery cooling unit-30, battery cooling circuit-31, heat exchange unit-40, first heat exchanger-41, second heat exchanger-42, third heat exchanger-43, fourth heat exchanger-44, fifth heat exchanger-45, first heat exchange branch-46, first switching valve-47, second heat exchange branch-48, second switching valve-49, expansion shut-off valve-50. Detailed Implementation

[0014] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0015] Figure 1 This is a schematic diagram of the cooling system of a range-extended pure electric vehicle in an embodiment of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the cooling system of a range-extended pure electric vehicle in an embodiment of this utility model. Figure 2 .

[0016] like Figure 1 and Figure 2As shown, the range-extended electric vehicle cooling system provided by this utility model includes an electric compressor cooling unit 10, a range extender cooling unit 20, and a battery cooling unit 30. A heat exchange unit 40 is provided between the electric compressor cooling unit 10, the range extender cooling unit 20, and the battery cooling unit 30. The electric compressor cooling unit 10 includes an electric compressor cooling circuit 11, the range extender cooling unit 20 includes a range extender cooling circuit 21, and the battery cooling unit 30 includes a battery cooling circuit 31. The heat exchange unit 40 ensures that the range extender has an optimal vibration and noise level, meeting the NVH performance requirements of the entire vehicle. The heat generated during range extender startup can be used to regulate the temperature of the battery cooling unit, ensuring battery system efficiency. Under certain extreme conditions, such as low temperatures, where battery efficiency is low, the range extender can be used to heat the cooling system through the heat exchange unit 40 to ensure battery efficiency. If the range extender's cold-start vibration and noise are too high, the temperature of the range extender can be regulated by the heat exchange unit 40 before startup to ensure that the range extender's startup noise reaches an optimal level.

[0017] like Figure 1 and Figure 2 As shown, the heat exchange unit 40 includes a first heat exchanger 41, a second heat exchanger 42, a third heat exchanger 43, a fourth heat exchanger 44, and a fifth heat exchanger 45. The first heat exchanger 41 is disposed on the range extender cooling circuit 21, and the second heat exchanger 42 is disposed on the battery cooling circuit 31, located to one side of the first heat exchanger 41. The first heat exchanger 41 and the second heat exchanger 42 can exchange heat, thereby transferring heat between the range extender cooling unit 20 and the battery cooling unit 30. The fifth heat exchanger 45 is disposed on the electric compressor cooling circuit. On the 11th, the third heat exchanger 43 is disposed on the range extender cooling circuit 21, located on one side of the fifth heat exchanger 45, and the fourth heat exchanger 44 is disposed on the battery cooling circuit 31, located on one side of the fifth heat exchanger 45. The third heat exchanger 43 and the fifth heat exchanger 45 can exchange heat, thereby transferring the heat between the electric compressor cooling unit 10 and the range extender cooling unit 20. The fourth heat exchanger 44 and the fifth heat exchanger 45 can exchange heat, thereby transferring the heat between the electric compressor cooling unit 10 and the battery cooling unit 30.

[0018] The heat exchange unit 40 also includes a first heat exchange branch 46, the end of which is connected to the range extender cooling circuit 21. The connection between the first heat exchange branch 46 and the range extender cooling circuit 21 is located on both sides of the first heat exchanger 41. A first switching valve 47 is provided on the first heat exchange branch 46, and the first switching valve 47 and the first heat exchanger 41 are connected in parallel. The heat exchange unit 40 also includes a second heat exchange branch 48, the connection between the second heat exchange branch 48 and the battery cooling circuit 31 is located on both sides of the second heat exchanger 42. The end of the second heat exchange branch 48 is connected to the battery cooling circuit 31. A second switching valve 49 is provided on the second heat exchange branch 48, and the second switching valve 49 and the second heat exchanger 42 are connected in parallel. When the first switching valve 47 and the second switching valve 49 are in the open state, heat exchange can be performed between the first heat exchanger 41 and the second heat exchanger 42; when the first switching valve 47 and the second switching valve 49 are in the closed state, heat exchange does not occur between the first heat exchanger 41 and the second heat exchanger 42.

[0019] The range-extended pure electric vehicle cooling system provided by this utility model also includes an expansion shut-off valve 50, which is installed on the electric compressor cooling circuit 11, the range extender cooling circuit 21, and the battery cooling circuit 32, and can throttle and reduce the pressure of the refrigerant in the cooling circuit.

[0020] Figure 3 This is a schematic diagram of a battery temperature management method in an embodiment of this utility model; Figure 4 This is a schematic diagram of the method for temperature management of the range extender in an embodiment of this utility model.

[0021] like Figure 3 and Figure 4 As shown, under certain extreme operating conditions, such as low temperatures, the battery efficiency is not high. In this case, the range extender can be used to heat the cooling system through the heat exchange unit 40. The first switching valve 47 and the second switching valve 49 are opened, and heat exchange can be carried out between the first heat exchanger 41 and the second heat exchanger 42 to ensure battery efficiency. After the battery temperature is within a suitable range, the first switching valve 47 and the second switching valve 49 are closed. If the cold start vibration noise of the range extender is too large, the temperature of the range extender is regulated through the heat exchange unit 40 before the range extender is started. The first switching valve 47 and the second switching valve 49 are opened, and heat exchange can be carried out between the first heat exchanger 41 and the second heat exchanger 42 to ensure that the start-up noise of the range extender reaches the optimal level.

[0022] The range-extended electric vehicle cooling system provided by this utility model includes an electric compressor cooling unit 10, a range extender cooling unit 20, and a battery cooling unit 30. A heat exchange unit 40 is provided between the electric compressor cooling unit 10, the range extender cooling unit 20, and the battery cooling unit 30. The electric compressor cooling unit 10 includes an electric compressor cooling circuit 11, the range extender cooling unit 20 includes a range extender cooling circuit 21, and the battery cooling unit 30 includes a battery cooling circuit 31. The heat exchange unit 40 ensures that the range extender has an optimal vibration and noise level, meeting the overall vehicle NVH performance requirements. The heat generated during range extender startup can be used to regulate the temperature of the battery cooling unit, ensuring battery system efficiency. Under certain extreme conditions, such as low temperatures, where battery efficiency is low, the range extender can be used to heat the cooling system through the heat exchange unit 40 to maintain battery efficiency. If the range extender's cold-start vibration and noise are too high, the temperature of the range extender can be regulated by the heat exchange unit 40 before startup to ensure that the range extender's startup noise reaches an optimal level.

[0023] In certain extreme operating conditions, such as low temperatures, where battery efficiency is low, the range extender can be used to heat the cooling system through the heat exchange unit 40. The first switching valve 47 and the second switching valve 49 are opened, allowing heat exchange between the first heat exchanger 41 and the second heat exchanger 42 to ensure battery efficiency. Once the battery temperature is within a suitable range, the first switching valve 47 and the second switching valve 49 are closed. If the range extender's cold start vibration noise is too high, the range extender's temperature can be regulated through the heat exchange unit 40 before starting. The first switching valve 47 and the second switching valve 49 are opened, allowing heat exchange between the first heat exchanger 41 and the second heat exchanger 42 to ensure that the range extender's starting noise reaches an optimal level.

[0024] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A cooling system for a range-extended pure electric vehicle, characterized in that, It includes an electric compressor cooling unit (10), a range extender cooling unit (20) and a battery cooling unit (30), and a heat exchange unit (40) is provided between the electric compressor cooling unit (10), the range extender cooling unit (20) and the battery cooling unit (30).

2. The cooling system for a range-extended pure electric vehicle according to claim 1, characterized in that, The electric compressor cooling unit (10) includes an electric compressor cooling circuit (11); the range extender cooling unit (20) includes a range extender cooling circuit (21); and the battery cooling unit (30) includes a battery cooling circuit (31).

3. The cooling system for a range-extended pure electric vehicle according to claim 2, characterized in that, The heat exchange unit (40) includes a first heat exchanger (41), a second heat exchanger (42), a third heat exchanger (43), a fourth heat exchanger (44), and a fifth heat exchanger (45). The first heat exchanger (41) is disposed on the range extender cooling circuit (21), and the second heat exchanger (42) is disposed on the battery cooling circuit (31) and located on one side of the first heat exchanger (41). The fifth heat exchanger (45) is disposed on the electric compressor cooling circuit (11), the third heat exchanger (43) is disposed on the range extender cooling circuit (21) and located on one side of the fifth heat exchanger (45), and the fourth heat exchanger (44) is disposed on the battery cooling circuit (31) and located on one side of the fifth heat exchanger (45).

4. The cooling system for a range-extended pure electric vehicle according to claim 3, characterized in that, The heat exchange unit (40) further includes a first heat exchange branch (46), the end of which is connected to the range extender cooling circuit (21). A first switching valve (47) is provided on the first heat exchange branch (46), and the first switching valve (47) and the first heat exchanger (41) are connected in parallel.

5. The cooling system for a range-extended pure electric vehicle according to claim 4, characterized in that, The heat exchange unit (40) further includes a second heat exchange branch (48), the end of which is connected to the battery cooling circuit (31). A second switching valve (49) is provided on the second heat exchange branch (48), and the second switching valve (49) and the second heat exchanger (42) are connected in parallel.

6. The cooling system for a range-extended pure electric vehicle according to claim 2, characterized in that, It also includes an expansion shut-off valve (50), which is disposed on the electric compressor cooling circuit (11), the range extender cooling circuit (21), and the battery cooling circuit (31).

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