An integrated vehicle thermal management system

Abstract

The application discloses an integrated vehicle thermal management system, comprising: an air conditioner assembly, comprising: a main pipeline, wherein a compressor, an indoor heat exchanger and a plate heat exchanger are arranged on the main pipeline; a battery thermal management assembly for refrigerating and heating a battery box, having a first connecting pipeline connected with the plate heat exchanger, and a first water tank and a first water pump are further arranged on the first connecting pipeline; and a motor thermal management assembly for refrigerating and heating a motor, having a second connecting pipeline connected with the main pipeline. The application has the advantages that refrigeration and heating of a passenger area, a battery and a motor in a vehicle are integrated, space occupation is reduced, vehicle cost is lowered, energy utilization efficiency is improved, the air conditioner assembly, the battery thermal management assembly and the motor thermal management assembly are integrated and designed, refrigeration and heating resources are shared and optimally configured, and energy waste and equipment redundancy caused by a traditional independent system are avoided.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more specifically to an integrated vehicle thermal management system. Background Technology

[0002] Due to increasingly severe fuel shortages, large buses using internal combustion engines are gradually being phased out. Most urban buses now use batteries for power, with energy storage batteries powering the roof-mounted air conditioning systems in new energy buses. Since the optimal operating temperature for battery packs is 25℃~35℃, and the power battery is one of the key components of pure electric vehicles, temperature has a significant impact on its overall performance and lifespan. To extend battery life, improve its chemical performance and energy efficiency, and extend vehicle range, a properly matched battery cooling management system is necessary. This involves cooling the battery under high temperatures and heating it under low temperatures to maintain temperature balance, eliminate the risk of thermal runaway, and ultimately improve the overall performance of the electric vehicle.

[0003] Existing vehicle thermal management systems typically only manage the thermal performance of the passenger area inside the vehicle and the thermal performance of the vehicle battery. During use, the motor also requires thermal management. Existing technologies generally use a separate cooling and heating system, which not only requires more vehicle space but also increases vehicle costs. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an integrated vehicle thermal management system that integrates thermal management of the vehicle's passenger area, battery pack, and motor, thereby reducing space occupation, lowering vehicle manufacturing costs, and improving energy efficiency.

[0005] Specifically, this invention discloses an integrated vehicle thermal management system, comprising:

[0006] An air conditioning assembly includes: a main piping system, on which a compressor, an indoor heat exchanger, and a plate heat exchanger are installed;

[0007] A battery thermal management component for cooling and heating the battery box has a first connecting pipe connected to the plate heat exchanger, and a first water tank and a first water pump are also provided on the first connecting pipe.

[0008] The motor thermal management component is used for cooling and heating the motor and has a second connecting pipe that connects to the main pipe.

[0009] The advantages of this invention are that it integrates the cooling and heating of the passenger area, battery and motor, reducing space occupation, lowering vehicle costs and improving energy efficiency. By integrating the air conditioning components, battery thermal management components and motor thermal management components, it achieves the sharing and optimized configuration of cooling and heating resources, avoiding energy waste and equipment redundancy caused by traditional independent systems.

[0010] Furthermore, the air conditioning assembly also includes: a sight glass, a dryer, an outdoor heat exchanger, and a reversing valve arranged sequentially on the main pipeline, the reversing valve being connected to a third pipeline, and the compressor being connected to the reversing valve through the third pipeline.

[0011] The advantages of adopting the above technical solution are as follows: the sight glass is used to observe the state and flow of the refrigerant, which allows maintenance personnel to judge in real time whether the refrigerant in the system is sufficient and whether there are abnormal phenomena such as bubbles or impurities, thereby discovering potential faults in time; the dryer is used to adsorb moisture and acidic substances in the refrigerant, preventing moisture from freezing and clogging pipes or corroding system components in low-temperature environments, effectively ensuring the stability and reliability of the refrigeration cycle; and the reversing valve is used to change the flow direction of the refrigerant, realizing flexible switching between cooling and heating modes, so that the air conditioning components can adapt to the temperature regulation needs under different seasons and operating conditions.

[0012] Furthermore, the third pipeline is also sequentially equipped with a return gas temperature sensor, a low pressure sensor, a gas-liquid separator, a pressure relief valve, a high pressure sensor, and an oil separator.

[0013] The advantages of adopting the above technical solution are that it can detect the temperature and pressure of the system operation, prevent liquid refrigerant from entering the compressor and causing liquid slugging damage, effectively extend the service life of the compressor, and automatically open the pressure relief when the system pressure rises abnormally and exceeds the safety limit, protecting the pipeline and key components from high pressure damage, and maintaining the normal circulation efficiency and heat exchange performance of the refrigerant.

[0014] Furthermore, the first connecting pipe is equipped with water valve one and water valve four, which are located on the first connecting pipes on both sides of the plate heat exchanger. The first connecting pipe is also equipped with a fourth connecting pipe, which is connected in parallel with the plate heat exchanger. The fourth connecting pipe is equipped with water valve two, and water valve one and water valve four are used to control the on / off state of the two ends of the first connecting pipe.

[0015] Furthermore, the first connecting pipe is connected to the battery box, and a water-heating PTC25 is also provided on the first connecting pipe.

[0016] The advantage of adopting the above technical solution is that when water valve one and water valve four are closed, the battery box, the first water tank and the water heater PTC first form a circulation under the connection of the fourth connecting pipe. When the temperature drops in winter, the water heater PTC25 heats the cooling water in the pipe and drives the circulation through the water pump to ensure the temperature of the battery box and extend the vehicle's driving range.

[0017] Furthermore, the second connecting pipe is connected to a fifth connecting pipe, on which the motor heat exchanger is installed, and a water valve is also installed, which is used to control the on / off state of the fifth connecting pipe.

[0018] Furthermore, a second water tank and a second water pump are also installed on the second connecting pipeline, and a water valve is installed on the second connecting pipeline.

[0019] The advantage of adopting the above technical solution is that the fifth pipeline enables the motor heat exchanger, the second water tank, the second water pump and the motor to form a loop. When heat dissipation is required in summer, the motor heat exchanger can independently circulate heat to the motor, and the second water pump drives the coolant to flow and dissipate heat through the motor radiator, thereby realizing the cooling function of the motor.

[0020] Furthermore, two valve cores are provided on the first connecting pipe, and the valve cores are located on both sides of the plate heat exchanger.

[0021] The advantage of adopting the above technical solution is that the valve core configuration divides the first connecting pipeline into multiple independently maintainable sections. When the plate heat exchanger needs to be repaired, cleaned or replaced, local isolation can be achieved by closing the valve core of the corresponding section, without having to empty the entire cooling system, which greatly shortens maintenance time and reduces operation and maintenance costs.

[0022] Furthermore, the third pipe is also equipped with an oil return capillary. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is the overall connection diagram of the present invention.

[0025] Figure 2 This is a schematic diagram of the refrigerant flow direction of the present invention.

[0026] The reference numerals used in the attached figures are as follows:

[0027] Main pipeline 1; Compressor 11; Indoor heat exchanger 12; Plate heat exchanger 13; Sight glass 14; Dryer 15; Outdoor heat exchanger 16; Reversing valve 17; Condensing temperature sensor 18; First connecting pipeline 2; First water tank 21; First water pump 22; Battery box 23; Water valve four 24; Hydrothermal PTC 25; Valve core 26; Water valve one 27; Second connecting pipeline 3; Motor 31; Second water tank 32; Second water pump 33; Water valve six 34; Water valve three 35; Third pipeline 4; Return gas temperature sensor 41; Low pressure sensor 42; Gas-liquid separator 43; Pressure relief valve 44; High pressure sensor 45; Oil separator 46; Fourth connecting pipeline 5; Water valve two 51; Fifth connecting pipeline 6; Motor heat exchanger 61; Water valve five 62; Expansion valve 7. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] like Figure 1-2 As shown, this invention discloses an integrated vehicle thermal management system, comprising:

[0030] An air conditioning unit includes: a main piping 1, and also includes a compressor 11, an indoor heat exchanger 12 and a plate heat exchanger 13, wherein refrigerant flows within the main piping;

[0031] A battery thermal management component is used to cool or heat the battery box 23. It has a first connecting pipe 2 connected to the plate heat exchanger 13. The connecting pipe is also provided with a first water tank 21 and a first water pump 22.

[0032] The motor thermal management component, used for cooling and heating the motor 31, has a second connecting pipe 3 connected to the main connecting pipe 1. Coolant flows within the first connecting pipe 2 and the second connecting pipe 3.

[0033] The advantages of this invention are that it integrates the cooling and heating of the passenger area, battery and motor, reducing space occupation, lowering vehicle costs and improving energy efficiency. By integrating the air conditioning components, battery thermal management components and motor thermal management components, it achieves the sharing and optimized configuration of cooling and heating resources, avoiding energy waste and equipment redundancy caused by traditional independent systems.

[0034] In some implementations, the air conditioning components also include: a sight glass 14, a dryer 15, an outdoor heat exchanger 16, a reversing valve 17, and an indoor heat exchanger 12 sequentially arranged on the main pipeline 1. The reversing valve 17 is a four-way reversing valve. Both indoor heat exchangers 12 and 12 are finned heat exchangers. The four-way reversing valve 17 is connected to a third pipeline 4. On the third pipeline 4, a valve core 26, a return gas temperature sensor 41, a low pressure sensor 42, a gas-liquid separator 43, a compressor 11, a pressure relief valve 44, a high pressure sensor 45, and an oil separator 46 are sequentially arranged. The third pipeline 4 is connected to the main pipeline 1. The compressor 11 drives the refrigerant to flow in the main pipeline 1 and the third pipeline 4. When the vehicle needs cooling, the indoor heat exchanger 12 acts as an evaporator to lower the temperature inside the vehicle, and the outdoor heat exchanger 16 acts as a condenser to dissipate heat and lower the temperature of the refrigerant. Plate heat exchanger 13 is connected in parallel with indoor heat exchanger 12, and plate heat exchanger 13 provides heat exchange for battery thermal management components and motor thermal management components. An expansion valve 7 is also installed between indoor heat exchanger 12 and sight glass 14. A check valve is also installed on the pipe connecting to the plate heat exchanger. Outdoor heat exchanger 12 is also connected to a condensing temperature sensor.

[0035] In some embodiments, the plate heat exchanger 13 has a refrigerant side connection to an air conditioning system and a coolant side connection to a battery thermal management component and a motor thermal management component. It has a first extension pipe and a second extension pipe on the coolant side. A first connecting pipe 2 and a second connecting pipe 3 are respectively connected to the first extension pipe and the second extension pipe, so that the battery thermal management component and the motor thermal management component are connected in parallel.

[0036] Water valve 27 and water valve 24 are installed on the first connecting pipe 2. Water valve 27 and water valve 24 are located on the first connecting pipe 2 on both sides of the plate heat exchanger 13. The first connecting pipe 2 is also provided with a fourth connecting pipe 5. Water valve 21 is installed on the fourth connecting pipe 5. The fourth connecting pipe 5 is connected in parallel with the plate heat exchanger 13. When water valve 27 and water valve 24 are closed, the battery box 23, the first water pump 22, water valve 21, the first water tank and the water heater PTC 25 are connected in sequence to form a coolant circulation. When the temperature drops in winter, the water heater PTC 25 heats the coolant in the pipe and drives the circulation through the water pump to ensure the temperature of the battery box 23 and extend the vehicle's driving range. When cooling is required, only the first water valve and the fourth water valve need to be opened. The coolant exchanges heat through the plate heat exchanger 13 to reduce the temperature of the battery box 23.

[0037] In some implementations, the second connecting pipe 3 is connected to a fifth connecting pipe 6. A motor heat exchanger 61 is installed on the fifth connecting pipe 6. The motor heat exchanger 61 is connected in parallel with the plate heat exchanger 13. The entire second connecting pipe 3 is controlled by water valve 35 and water valve 64. A water valve 52 is also installed on the fifth connecting pipe 6 to control the opening and closing of the fifth connecting pipe 6. In summer, water valve 35 and water valve 52 are closed, and water valve 64 is open. A second water tank 32 and a second water pump 33 are also installed on the second connecting pipe 3. The second water pump 33 drives the coolant circulation in the pipe, and the second water tank 32 replenishes the coolant in the pipe. The motor 31 is independently cooled by the motor heat exchanger 61. The motor heat exchanger 61 is an outdoor heat exchanger and can be a horizontal flow, plate, or finned heat exchanger to exchange the heat of the motor 31 with the external environment.

[0038] Furthermore, two valve cores 26 are provided on the first connecting pipe 2, and the valve cores 26 are located on the pipes on both sides of the plate heat exchanger 13.

[0039] Furthermore, the third pipe 4 is also equipped with an oil return capillary tube. The starting point of the oil return capillary tube is at the bottom oil return port of the oil separator 46, and the ending point is in the suction line of the compressor 11, near the compressor 11 or the gas-liquid separator 43. The oil separator 46 separates lubricating oil from the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 11, which accumulates at the bottom. The oil return capillary tube utilizes the huge pressure difference between the high-pressure side and the low-pressure side of the system to continuously "push" the oil back to the suction side of the compressor 11, so that it can be re-drawn into the compressor 11.

[0040] All water valves installed on the pipeline are shut-off valves, which are controlled to open and close by a control system.

[0041] Summer operating conditions: The vehicle interior is cooled, the battery is cooled, and the motor is cooled by air.

[0042] 1. Water valve 35 and water valve 64 are closed, water valve 5 is open, and the motor cooling system relies on the motor heat exchanger 61 for independent heat dissipation;

[0043] 2. Water valve 1 27 and water valve 4 24 are open, water valve 2 51 is closed, and the battery box 23 needs to be cooled by the plate heat exchanger of the air conditioning unit to achieve the purpose of cooling the battery.

[0044] 3. The interior environment is cooled by the indoor heat exchanger 12.

[0045] Winter operating conditions, winter low temperatures (below -10℃)

[0046] Operating status: The vehicle interior is heated and the battery is cooled in a self-circulating state; the motor heats up the plate heat exchanger 13.

[0047] 1. Water valve 1 (27) and water valve 4 (24) are closed, water valve 2 (51) is open, and the second connecting pipe 3 connects to the battery box cooling system, which is in a self-circulating state. If the battery needs to be heated, the water-heating PTC needs to be turned on to heat the battery.

[0048] 2. Water valves 35 and 64 are opened, and water valve 5 is closed. The heat from the motor thermal management component is transferred to the air conditioning system through the plate heat exchanger 13, which increases the superheat of the compressor return gas, thereby achieving energy saving and improving the driving range.

[0049] 3. Heating inside the vehicle is achieved through an indoor radiator.

[0050] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. An integrated vehicle thermal management system, characterized in that, include: An air conditioning assembly includes: a main pipeline (1) on which a compressor (11), an indoor heat exchanger (12) and a plate heat exchanger (13) are connected. The battery thermal management component is used to cool and heat the battery box (23), and has a first connecting pipe (2) connected to the plate heat exchanger (13). The first connecting pipe (2) is also provided with a first water tank (21) and a first water pump (22). The motor thermal management component is used to cool and heat the motor (31) and has a second connecting pipe (3) connected to the plate heat exchanger (13).

2. The integrated vehicle thermal management system according to claim 1, characterized in that, The air conditioning assembly further includes: a sight glass (14), a dryer (15), an outdoor heat exchanger (16) and a reversing valve (17) arranged sequentially on the main pipeline (1), the reversing valve (17) being connected to a third pipeline (4), and the compressor (11) being connected to the reversing valve (17) through the third pipeline (4).

3. The integrated vehicle thermal management system according to claim 2, characterized in that, The third pipeline (4) is also equipped with a return gas temperature sensor (41), a low pressure sensor (42), a gas-liquid separator (43), a pressure relief valve (44), a high pressure sensor (45), and an oil separator (46) in sequence.

4. The integrated vehicle thermal management system according to claim 1, characterized in that, Water valve 1 (27) and water valve 4 (24) are provided on the first connecting pipe (2). Water valve 1 (27) and water valve 4 (24) are located on the first connecting pipe (2) connecting both sides of the plate heat exchanger (13). The first connecting pipe (2) is also provided with a fourth connecting pipe (5). The fourth connecting pipe (5) is connected in parallel with the plate heat exchanger (13). Water valve 2 (51) is provided on the fourth connecting pipe (5). Water valve 1 (27) and water valve 4 (24) are used to control the opening and closing of the two ends of the first connecting pipe (2).

5. The integrated vehicle thermal management system according to claim 4, characterized in that, The first connecting pipe (2) is connected to the battery box (23), and a water-heating PTC (25) is also provided on the first connecting pipe (2).

6. The integrated vehicle thermal management system according to claim 1, characterized in that, The second connecting pipe (3) is connected to the fifth connecting pipe (6), and the fifth connecting pipe (6) is equipped with a motor heat exchanger (61). The fifth connecting pipe (6) is also equipped with a water valve (62), which is used to control the opening and closing of the fifth connecting pipe (6).

7. The integrated vehicle thermal management system according to claim 6, characterized in that, The second connecting pipe (3) is also equipped with a second water tank (32) and a second water pump (33), and a water valve (34) is installed on the second connecting pipe (3).

8. The integrated vehicle thermal management system according to claim 1, characterized in that, Two valve cores (26) are provided on the first connecting pipe (2), and the valve cores (26) are located on both sides of the plate heat exchanger (13).

9. The integrated vehicle thermal management system according to claim 2, characterized in that, The third pipe (4) is also equipped with an oil return capillary.

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