Double-compressor battery thermal management system

Abstract

The utility model belongs to the technical field of electric automobiles, and particularly relates to a double-compressor battery thermal management system which comprises a shell, a bottom plate is arranged at the bottom of the inner side of the shell, a first compressor and a second compressor are connected to the bottom plate, and the first compressor and the second compressor are arranged diagonally. A first heat exchanger is arranged at one end of the first compressor. A second heat exchanger is arranged on one side of the second compressor. A water pump is arranged between the first compressor and the second heat exchanger; a middle partition plate is connected to the middle of the inner side of the shell. The top of the middle partition plate is connected with a first PTC and a second PTC. By adopting the design of the two compressors, the more efficient and rapid temperature adjusting capacity is achieved; according to the design, the system is allowed to be flexibly adjusted under different temperatures and working conditions, and the response speed of refrigeration and heating is effectively increased; compared with a traditional single-compressor system, the double-compressor system can more effectively control and adjust the battery temperature under the extreme weather condition, and therefore the battery performance and safety are optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicles, and in particular relates to a dual-compressor battery thermal management system. Background Art

[0002] With the rapid development of the electric vehicle industry, the battery thermal management system has become one of the key technologies that restrict battery performance and life. Traditional battery thermal management systems mostly use a single compressor and refrigeration cycle. This system has problems such as low efficiency, long response time, and high energy consumption in practical applications. Especially under extreme weather conditions, a single compressor system is difficult to quickly and effectively adjust and control the battery temperature, which affects the performance and safety of the battery.

[0003] In order to solve the above problems, some technologies try to adopt methods such as enhancing the efficiency of heat exchangers or optimizing the refrigerant flow path. However, although these methods improve the heat dissipation capacity of the system to a certain extent, they still fail to fully solve the fundamental problems of low cooling efficiency and slow response speed. In addition, existing battery thermal management systems usually occupy a large space, which limits the interior space and design of the vehicle. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a dual-compressor battery thermal management system, which can effectively improve the thermal stability of the battery and the energy efficiency of the entire vehicle, while optimizing the working environment of the battery and extending the service life of the battery.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dual-compressor battery thermal management system comprises a housing, wherein a bottom plate is provided at the inner bottom of the housing, a first compressor and a second compressor are connected to the bottom plate, and the first compressor and the second compressor are arranged diagonally;

[0007] A first heat exchanger is disposed at one end of the first compressor, and a second heat exchanger is disposed at one side of the second compressor;

[0008] A water pump is provided between the first compressor and the second heat exchanger;

[0009] A middle partition is connected to the inner middle portion of the shell;

[0010] The top of the middle partition is connected with a first PTC and a second PTC.

[0011] The utility model further defines the technical solution:

[0012] Furthermore, the first heat exchanger is connected to a first expansion valve, and the first expansion valve is connected to a first condenser liquid outlet pipe;

[0013] The first compressor is connected to a first low-pressure hose and a first compression cooling pipe assembly;

[0014] The first heat exchanger, the first expansion valve, the first low-pressure hose, the first compressor, the first condenser liquid outlet pipe and the first compression cooling pipe assembly constitute a first cooling system.

[0015] Furthermore, the second compressor is connected to a second cooling pipe and a second low-pressure hose;

[0016] The second heat exchanger is connected to a second expansion valve, and the second expansion valve is connected to a second condenser liquid outlet pipe;

[0017] The second heat exchanger, the second expansion valve, the second low-pressure hose, the second compressor, the second condenser liquid outlet pipe and the second compression cooling pipe constitute a second cooling system.

[0018] Furthermore, the first compressor and the second compressor are connected in series.

[0019] Furthermore, the first PTC and the second PTC are connected in parallel.

[0020] Furthermore, a first three-way valve is provided between the water pump, the first heat exchanger and the second heat exchanger;

[0021] A second three-way valve and a third three-way valve are provided between the first heat exchanger, the second heat exchanger, the first PTC and the second PTC;

[0022] A fourth three-way valve is provided between the first PTC and the second PTC.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] First, the system achieves more efficient and faster temperature regulation capabilities by adopting a two-compressor design. This design allows the system to flexibly adjust under different temperatures and working conditions, effectively improving the response speed of cooling and heating. In addition, compared with the traditional single-compressor system, the dual-compressor system can more effectively control and adjust the battery temperature under extreme weather conditions, thereby optimizing battery performance and safety, and solving the problems of low cooling efficiency and slow response speed in existing technologies.

[0025] Secondly, the configuration of dual heat exchangers and multiple three-way valves in this system enhances the overall thermal management flexibility. By precisely controlling the flow of the refrigerant, the system can adjust the intensity and range of cooling or heating according to actual needs, thereby improving the heat exchange efficiency. This design not only ensures that the battery operates within the optimal temperature range and extends the battery life, but also improves the battery's working efficiency and the vehicle's energy utilization.

[0026] Finally, the present invention reduces the space occupied by the system by optimizing the layout of internal components, so that the internal space of the vehicle is better utilized. The application of the middle partition optimizes the space utilization in the vertical direction, improves the integration of the entire system and the overall appearance of the vehicle. In addition, the compact structure of the system also provides greater flexibility and possibilities for other designs and functions of electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the water pump of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the housing of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the second compressor of the utility model.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. The first heat exchanger;

[0033] 2. Liquid outlet pipe of the first condenser;

[0034] 3. The first low-pressure hose;

[0035] 4. Liquid outlet pipe of the second condenser;

[0036] 5. Second low-pressure hose;

[0037] 6. The first compressor;

[0038] 7. Second expansion valve;

[0039] 8. Second heat exchanger;

[0040] 9. Second compressor;

[0041] 10. Second cooling tube;

[0042] 11. The first expansion valve;

[0043] 12. First compression cooling pipe assembly;

[0044] 13. First three-way valve;

[0045] 14. Second three-way valve;

[0046] 15. The third three-way valve;

[0047] 16. Fourth three-way valve;

[0048] 17. Water pump;

[0049] 18, shell; 181, bottom plate; 182, middle partition;

[0050] 19. First PTC; 20. Second PTC. DETAILED DESCRIPTION

[0051] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0052] See also Figure 1-4 A dual-compressor battery thermal management system includes a shell 18, a bottom plate 181 is provided at the inner bottom of the shell 18, a first compressor 6 and a second compressor 9 are connected to the bottom plate 181, and the first compressor 6 and the second compressor 9 are arranged diagonally; a first heat exchanger 1 is provided at one end of the first compressor 6, and a second heat exchanger 8 is provided on one side of the second compressor 9; a water pump 17 is provided between the first compressor 6 and the second heat exchanger 8; a middle partition 182 is connected to the middle part of the inner side of the shell 18; a first PTC 19 and a second PTC 20 are connected to the top of the middle partition 182; this layout optimizes the space utilization inside the system, makes the refrigerant flow more efficient, thereby improving the heat exchange efficiency of the system, and effectively solves the problem of battery temperature management.

[0053] See also Figure 1-3 The first heat exchanger 1 is connected to a first expansion valve 11, and the first expansion valve 11 is connected to a first condenser liquid outlet pipe 2; the first compressor 6 is connected to a first low-pressure hose 3 and a first pressure cooling pipe assembly 12; the first heat exchanger 1, the first expansion valve 11, the first low-pressure hose 3, the first compressor 6, the first condenser liquid outlet pipe 2 and the first pressure cooling pipe assembly 12 constitute a first cooling system; the cooling system achieves a fast heat exchange response through precise component matching and efficient flow control to adapt to different external temperatures and operating conditions, ensuring that the battery module operates at an optimal temperature.

[0054] See also Figure 2-3 The second compressor 9 is connected to a second cooling pipe 10 and a second low-pressure hose 5; the second heat exchanger 8 is connected to a second expansion valve 7, and the second expansion valve 7 is connected to a second condenser liquid outlet pipe 4; the second heat exchanger 8, the second expansion valve 7, the second low-pressure hose 5, the second compressor 9, the second condenser liquid outlet pipe 4 and the second cooling pipe 10 constitute a second cooling system; the system works independently of the first system, and can be operated separately or simultaneously as needed, thereby enhancing the flexibility and redundancy of the overall system, and improving the reliability of the battery and the safety of the entire vehicle.

[0055] See also Figure 1 The first compressor 6 and the second compressor 9 are connected in series to achieve the coordinated operation of the two compressors, thereby improving the refrigeration efficiency and the overall performance of the thermal management system; this design allows the two systems to operate in different modes to adapt to different heat load requirements.

[0056] See also Figure 2 The first PTC 19 and the second PTC 20 are connected in parallel with each other. This configuration increases the heating capacity of the system, especially in cold environments, and can quickly provide the necessary heat to the battery to ensure that the battery performance is not affected by low temperature.

[0057] See also Figure 1-3 A first three-way valve 13 is arranged between the water pump 17, the first heat exchanger 1 and the second heat exchanger 8; a second three-way valve 14 and a third three-way valve 15 are arranged between the first heat exchanger 1, the second heat exchanger 8, the first PTC 19 and the second PTC 20; a fourth three-way valve 16 is arranged between the first PTC 19 and the second PTC 20; the arrangement of these three-way valves allows the system to flexibly adjust the flow direction and distribute the refrigerant under different working conditions, thereby maximizing the heat exchange efficiency and ensuring the efficient operation of the system and the stability of the battery.

[0058] The working principle of the utility model is:

[0059] During operation, temperature regulation is achieved by utilizing the phase change process of the refrigerant. The system circulates the refrigerant through the first compressor 6 and the second compressor 9; specifically, the system first compresses the refrigerant to a high pressure and high temperature state, and then dissipates the heat through the first heat exchanger 1 and the second heat exchanger 8, turning the refrigerant into a high-temperature and high-pressure liquid. Next, the refrigerant is depressurized when passing through the diffusion valve in the low-pressure area, thereby forming a low-temperature and low-pressure gas. This low-temperature and low-pressure gas absorbs the surrounding heat and turns into a low-temperature and low-pressure liquid again. This process will continue to circulate to achieve the purpose of regulating the temperature.

[0060] The dual compressor system consists of the first compressor 6 and the second compressor 9 connected in series to the first heat exchanger 1 and the second heat exchanger 8 respectively through the refrigeration pipe, connected in series to the water pump 17 through the rubber water pipe, and then connected in parallel to the first PTC 19 and the second PTC 20. In short, the dual compressors, dual refrigeration circuits, and dual systems work to achieve the functions of passenger compartment cooling, passenger compartment heating, battery liquid cooling, battery liquid heating, motor electronic control cooling, and waste heat utilization.

[0061] The first PTC 19 and the second PTC 20 are placed on the top by using the middle partition 182, which reduces the horizontal space and makes better use of the vertical space. On the basis of the single battery cooling function, the battery temperature is made more uniform, which has the advantages of high cab safety and good comfort.

[0062] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A dual compressor battery thermal management system, comprising a housing (18), characterized in that: A bottom plate (181) is provided at the inner bottom of the shell (18), and a first compressor (6) and a second compressor (9) are connected to the bottom plate (181), and the first compressor (6) and the second compressor (9) are arranged diagonally; A first heat exchanger (1) is provided at one end of the first compressor (6), and a second heat exchanger (8) is provided at one side of the second compressor (9); A water pump (17) is provided between the first compressor (6) and the second heat exchanger (8); A middle partition plate (182) is connected to the middle portion of the inner side of the shell (18); The top of the middle partition plate (182) is connected to a first PTC (19) and a second PTC (20).

2. A dual compressor battery thermal management system according to claim 1, characterized in that: The first heat exchanger (1) is connected to a first expansion valve (11), and the first expansion valve (11) is connected to a first condenser liquid outlet pipe (2); The first compressor (6) is connected to a first low-pressure hose (3) and a first compression cooling pipe assembly (12); The first heat exchanger (1), the first expansion valve (11), the first low-pressure hose (3), the first compressor (6), the first condenser liquid outlet pipe (2) and the first compression cooling pipe assembly (12) constitute a first cooling system.

3. A dual compressor battery thermal management system according to claim 2, characterized in that: The second compressor (9) is connected to a second cooling pipe (10) and a second low-pressure hose (5); The second heat exchanger (8) is connected to a second expansion valve (7), and the second expansion valve (7) is connected to a second condenser liquid outlet pipe (4); The second heat exchanger (8), the second expansion valve (7), the second low-pressure hose (5), the second compressor (9), the second condenser liquid outlet pipe (4) and the second compression cooling pipe (10) constitute a second cooling system.

4. A dual compressor battery thermal management system according to claim 1, characterized in that: The first compressor (6) and the second compressor (9) are connected in series.

5. A dual compressor battery thermal management system according to claim 1, characterized in that: The first PTC (19) and the second PTC (20) are connected in parallel.

6. A dual compressor battery thermal management system according to claim 1, characterized in that: A first three-way valve (13) is provided between the water pump (17), the first heat exchanger (1) and the second heat exchanger (8); A second three-way valve (14) and a third three-way valve (15) are provided between the first heat exchanger (1), the second heat exchanger (8), the first PTC (19) and the second PTC (20); A fourth three-way valve (16) is provided between the first PTC (19) and the second PTC (20).

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