Valve group integration module, vehicle thermal management system and vehicle

Abstract

The invention relates to a valve group integration module, a vehicle thermal management system and a vehicle, the valve group integration module comprises a base body (1), a first expansion valve (2) and a second expansion valve (3), a first flow channel (11) and a second flow channel (12) are arranged in the base body (1), the first expansion valve (2) is arranged in the first flow channel (11), and the second expansion valve (3) is arranged in the second flow channel (12). According to the technical scheme, the valve group integration module is high in integration level and small in occupied space.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a valve group integrated module, a vehicle thermal management system, and a vehicle. Background Art

[0002] In the thermal management system of the related art, the battery pack thermal management system adopts a direct cooling method (i.e., the refrigerant flows through the battery pack cold plate) to cool the battery pack. This method has a good cooling effect, but in order to achieve the connection between the battery pack cold plate and the refrigerant, a large number of thermal management components (such as various valves) are involved, which leads to a complex piping structure of the battery pack thermal management system, great difficulty in installation, high space occupancy, and difficulty in subsequent maintenance. Summary of the Invention

[0003] An object of the present disclosure is to provide a valve group integrated module, a vehicle thermal management system, and a vehicle, wherein the valve group integrated module has high integration and occupies a small space.

[0004] In order to achieve the above-mentioned objectives, the present disclosure provides a valve group integrated module, which includes a base, a first expansion valve and a second expansion valve, a first flow channel and a second flow channel are arranged in the base, the first expansion valve is arranged in the first flow channel, and the second expansion valve is arranged in the second flow channel.

[0005] Optionally, the caliber of the second expansion valve is larger than the caliber of the first expansion valve.

[0006] Optionally, the caliber of the first expansion valve is 1.0 mm-2.5 mm, and / or the caliber of the second expansion valve is ≥10 mm.

[0007] Optionally, the valve group integrated module also includes a sensor unit and a control unit. The sensor unit is installed in the second flow channel and is arranged between the second expansion valve and the inlet of the second flow channel to collect the temperature signal and pressure signal of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate. The control unit is electrically connected to the sensor unit, the first expansion valve and the second expansion valve, respectively, to adjust the opening of the first expansion valve and / or the second expansion valve according to the temperature signal and pressure signal of the sensor unit.

[0008] Optionally, the sensor unit is arranged on a side of the second flow channel close to its own inlet.

[0009] Optionally, the sensor unit is configured as a first temperature and pressure sensor.

[0010] Optionally, the control unit is detachably mounted on the base.

[0011] Optionally, the valve group integrated module further includes a one-way valve, which is installed in the second flow channel and arranged between the second expansion valve and the outlet of the second flow channel.

[0012] Optionally, the caliber of the one-way valve is ≥10 mm.

[0013] Based on the above scheme, the present disclosure also provides a vehicle thermal management system, which includes a battery pack cold plate and the above-mentioned valve group integrated module, the refrigerant inlet of the battery pack cold plate is connected to the outlet of the first flow channel, and the refrigerant outlet of the battery pack cold plate is connected to the inlet of the second flow channel, wherein the first expansion valve and / or the second expansion valve are used to adjust the refrigerant evaporation pressure in the battery pack cold plate.

[0014] Optionally, the first expansion valve and / or the second expansion valve is used to adjust the refrigerant evaporation pressure in the battery pack cold plate to 6 bar to 9 bar.

[0015] Optionally, the vehicle thermal management system includes an outdoor compressor and an indoor condenser, the refrigerant outlet of the outdoor compressor is connected to the refrigerant inlet of the indoor condenser, the refrigerant outlet of the indoor condenser is connected to the inlet of the first flow channel, and the refrigerant inlet of the outdoor compressor is connected to the outlet of the second flow channel.

[0016] Optionally, the vehicle thermal management system further includes a liquid storage tank, a refrigerant inlet of the liquid storage tank is connected to a refrigerant outlet of the indoor condenser, and a refrigerant outlet of the liquid storage tank is connected to an inlet of the first flow channel.

[0017] Optionally, the vehicle thermal management system further includes an evaporator, the refrigerant inlet of the evaporator is connected to the refrigerant outlet of the indoor condenser, and the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the outdoor compressor.

[0018] In addition, the present disclosure also provides a vehicle, which includes the above-mentioned vehicle thermal management system.

[0019] Through the above technical solution, a first flow channel and a second flow channel are set on the base of the valve group integrated module provided by the present disclosure, and the first expansion valve is set in the first flow channel, and the second expansion valve is set in the second flow channel. This can, on the one hand, replace the corresponding connecting pipes of the existing first expansion valve and the second expansion valve and reduce the brackets used to install the first expansion valve and the second expansion valve, resulting in a smaller number of parts and making the corresponding pipeline structure of the first expansion valve and the second expansion valve simpler. On the other hand, the flow channel of the first expansion valve and the flow channel of the second expansion valve are integrated together, which has a high degree of integration and can reduce the space occupied by the flow channel of the first expansion valve and the flow channel of the second expansion valve. In addition, during installation, it is only necessary to install the first expansion valve in the first flow channel and the second expansion valve in the second flow channel. The first expansion valve and the second expansion valve are easy to install and facilitate subsequent maintenance. In addition, the flow channel is opened inside the base to reduce the weight of the entire valve group integrated module. Therefore, the valve group integrated module provided by the present disclosure has a high degree of integration and takes up little space.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] Figure 1 1 is a schematic diagram of the three-dimensional structure of a valve group integrated module provided according to a specific embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the valve group integrated module provided in accordance with a specific embodiment of the present disclosure from another angle;

[0024] Figure 3 2 is a structural schematic diagram of a valve group integrated module provided according to a specific embodiment of the present disclosure from another angle;

[0025] Figure 4 1 is a schematic structural diagram of a first expansion valve, a second expansion valve, a sensor unit, and a one-way valve in a valve group integrated module provided according to a specific embodiment of the present disclosure;

[0026] Figure 5 is a cross-sectional view of a valve group integrated module provided according to a specific embodiment of the present disclosure;

[0027] Figure 6 is a cross-sectional view from another angle of the valve group integrated module provided according to a specific embodiment of the present disclosure;

[0028] Figure 7Schematic diagram of the flow path of the valve group integrated module provided according to a specific embodiment of the present disclosure;

[0029] Figure 8 It is a flow path schematic diagram of a vehicle thermal management system provided according to a specific embodiment of the present disclosure.

[0030] Description of Reference Numerals

[0031] 1-base; 11-first flow channel; 111-first inlet; 112-first outlet; 12-second flow channel; 121-second inlet; 122-second outlet; 2-first expansion valve; 3-second expansion valve; 4-sensor unit; 41-first temperature and pressure sensor; 5-control unit; 51-interface; 52-mounting hole; 53-fastener; 6-check valve; 10-outdoor compressor; 20-indoor condenser; 30-liquid storage tank; 40-evaporator; 50-third expansion valve; 60-second temperature and pressure sensor; 70-battery pack cold plate. DETAILED DESCRIPTION

[0032] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0033] In this disclosure, unless otherwise indicated, the directional terms "inside" and "outside" refer to the inside and outside relative to the outline of the component itself. Furthermore, the use of terms such as "first" and "second" is intended to distinguish different components and does not imply order or importance. Furthermore, in the following description, when referring to the drawings, unless otherwise indicated, identical reference numerals in different drawings represent identical or similar elements. The above definitions are intended solely to explain and illustrate this disclosure and should not be construed as limiting the disclosure.

[0034] According to a specific embodiment of the present disclosure, a valve group integrated module is provided. Figures 1 to 7 An embodiment of the valve group integrated module is shown, wherein reference Figures 1 to 7 As shown, the valve group integrated module includes a base body 1, a first expansion valve 2 and a second expansion valve 3. A first flow channel 11 and a second flow channel 12 are provided in the base body 1. The first expansion valve 2 is provided in the first flow channel 11, and the second expansion valve 3 is provided in the second flow channel 12.

[0035] Through the above technical solution, a first flow channel 11 and a second flow channel 12 are provided on the base 1 of the valve group integrated module provided by the present disclosure, and the first expansion valve 2 is provided in the first flow channel 11, and the second expansion valve 3 is provided in the second flow channel 12. This can, on the one hand, replace the corresponding connecting pipes of the existing first expansion valve 2 and the second expansion valve 3 and reduce the brackets used to install the first expansion valve 2 and the second expansion valve 3, resulting in a smaller number of parts and a simpler structure of the corresponding pipes of the first expansion valve 2 and the second expansion valve 3. On the other hand, the flow channels of the first expansion valve 2 and the second expansion valve 3 are integrated together, which has a high degree of integration and can reduce the space occupied by the flow channels of the first expansion valve 2 and the second expansion valve 3. In addition, during installation, only the first expansion valve 2 needs to be installed in the first flow channel 11 and the second expansion valve 3 needs to be installed in the second flow channel 12. The first expansion valve 2 and the second expansion valve 3 are easy to install and facilitate subsequent maintenance. In addition, the flow channels are opened inside the base 1 to reduce the weight of the entire valve group integrated module. Therefore, the valve group integrated module provided by the present disclosure has a high degree of integration and takes up little space.

[0036] It should be noted that the application scenario of the valve group integrated module provided by the present disclosure can be selectively designed according to actual needs. For example, Figure 8 As shown, the valve group integrated module provided by the present disclosure can be applied to a vehicle thermal management system. This disclosure does not impose any restrictions on this, and those skilled in the art can selectively design it according to actual needs. Below, this disclosure only uses the application of the valve group integrated module to a vehicle thermal management system as an example for illustrative description.

[0037] In a specific embodiment of the present disclosure, a vehicle thermal management system is provided. Figure 8 An embodiment of the vehicle thermal management system is shown, referring to Figure 8 As shown, the vehicle thermal management system may include a battery pack cold plate 70 and the above-mentioned valve group integrated module. The refrigerant inlet of the battery pack cold plate 70 is connected to the outlet of the first flow channel 11, and the refrigerant outlet of the battery pack cold plate 70 is connected to the inlet of the second flow channel 12. The first expansion valve 2 and / or the second expansion valve 3 are used to adjust the refrigerant evaporation pressure in the battery pack cold plate 70. Figures 1 to 8 As shown, the first flow channel 11 has a first inlet 111 and a first outlet 112. The refrigerant flowing into the first flow channel 11 from the first inlet 111 passes through the first expansion valve 2 and flows into the refrigerant inlet of the battery pack cold plate 70 from the first outlet 112. The refrigerant flows through the battery pack cold plate 70 to cool the battery pack. The refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70 flows into the second inlet 121 of the second flow channel 12, and then passes through the second expansion valve 3 and flows out from the second outlet 122.

[0038] Among them, in some embodiments of the present disclosure, the first expansion valve 2 is used to adjust the evaporation pressure of the refrigerant in the battery pack cold plate 70, that is, the first expansion valve 2 can throttle the refrigerant entering the battery pack cold plate 70, that is, when the refrigerant passes through the first expansion valve 2, the first expansion valve 2 can throttle the refrigerant to reduce the pressure of the refrigerant, and the amount of refrigerant entering the battery pack cold plate 70 can be adjusted by changing the opening of the first expansion valve 2, thereby adjusting the evaporation pressure of the refrigerant in the battery pack cold plate 70, which is beneficial to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0039] In other embodiments of the present disclosure, the second expansion valve 3 is used to adjust the evaporation pressure of the refrigerant in the battery pack cold plate 70. The second expansion valve 3 can throttle the refrigerant flowing out of the battery pack cold plate 70, so that a step pressure difference is generated between the refrigerant flowing out of the battery pack cold plate 70 and the refrigerant further downstream (i.e., the refrigerant flowing into the refrigerant inlet of the outdoor compressor 10 as described below), so as to ensure that the refrigerant pressure in the battery pack cold plate 70 is not too low, thereby achieving the purpose of controlling the evaporation pressure of the refrigerant in the battery pack cold plate 70, and further helping to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0040] In some other embodiments of the present disclosure, both the first expansion valve 2 and the second expansion valve 3 are used to regulate the refrigerant evaporation pressure within the battery pack cold plate 70. The first expansion valve 2 can perform a primary throttling effect on the refrigerant entering the battery pack cold plate 70. As the refrigerant passes through the first expansion valve 2, the first expansion valve 2 can throttle the refrigerant to reduce its pressure. Furthermore, the amount of refrigerant entering the battery pack cold plate 70 can be adjusted by changing the opening of the first expansion valve 2. The second expansion valve 3 can perform a secondary throttling effect on the refrigerant exiting the battery pack cold plate 70, creating a stepped pressure differential between the refrigerant exiting the battery pack cold plate 70 and the refrigerant further downstream (i.e., the refrigerant entering the refrigerant inlet of the outdoor compressor 10, as described below). This ensures that the refrigerant pressure within the battery pack cold plate 70 does not drop too low, thereby achieving the purpose of controlling the refrigerant evaporation pressure within the battery pack cold plate 70. By throttling the refrigerant twice before and after the battery pack cold plate 70 , the evaporation pressure of the refrigerant in the battery pack cold plate 70 is controlled, thereby helping to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0041] Based on the above three types of embodiments, the refrigerant evaporation pressure in the battery pack cold plate 70 can be adjusted to 6 bar (gauge pressure) to 9 bar (gauge pressure) by the first expansion valve 2 and / or the second expansion valve 3. This arrangement can increase the refrigerant evaporation pressure in the battery pack cold plate 70 to the corresponding pressure when the refrigerant in the battery pack cold plate 70 is at 20°, thereby effectively solving the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling. In the above first type of embodiment, the refrigerant evaporation pressure in the battery pack cold plate 70 is adjusted to 6 bar (gauge pressure) to 9 bar (gauge pressure) by the first expansion valve 2; in the above second type of embodiment, the refrigerant evaporation pressure in the battery pack cold plate 70 is adjusted to 6 bar (gauge pressure) to 9 bar (gauge pressure) by the second expansion valve 3; in the above third type of embodiment, the refrigerant evaporation pressure in the battery pack cold plate 70 is adjusted to 6 bar (gauge pressure) to 9 bar (gauge pressure) by both the first expansion valve 2 and the second expansion valve 3. This disclosure does not impose any restrictions on this. In addition, the adjusted value of the refrigerant evaporation pressure in the battery pack cold plate 70 can be selectively designed according to actual conditions. For example, the refrigerant evaporation pressure in the battery pack cold plate 70 can be 6 bar (gauge pressure), 7 bar (gauge pressure), 8 bar (gauge pressure) or 9 bar (gauge pressure), and the present disclosure does not impose any restrictions on this.

[0042] The vehicle thermal management system may further include an outdoor compressor 10 and an indoor condenser 20. The refrigerant outlet of the outdoor compressor 10 is connected to the refrigerant inlet of the indoor condenser 20. The refrigerant outlet of the indoor condenser 20 is connected to the inlet of the first flow channel 11. The refrigerant inlet of the outdoor compressor 10 is connected to the outlet of the second flow channel 12. Figures 1 to 8 As shown, the refrigerant flowing out from the refrigerant outlet of the indoor condenser flows into the first flow channel 11 from the inlet of the first flow channel 11 (i.e., the first inlet 111), and flows into the refrigerant inlet of the battery pack cold plate 70 through the outlet of the first flow channel 11 (i.e., the first outlet 112), and flows in the battery pack cold plate 70 to cool the battery pack. The refrigerant flowing out from the refrigerant outlet of the battery pack cold plate 70 enters the second flow channel 12 from the inlet of the second flow channel 12 (i.e., the second inlet 121), and flows into the refrigerant inlet of the outdoor compressor through the outlet of the second flow channel 12 (i.e., the second outlet 122).

[0043] Further, refer to Figure 8As shown, the vehicle thermal management system also includes a liquid storage tank 30, the refrigerant inlet of the liquid storage tank 30 is connected to the refrigerant outlet of the indoor condenser 20, and the refrigerant outlet of the liquid storage tank 30 is connected to the inlet of the first flow channel 11, that is, the refrigerant flowing out of the refrigerant outlet of the indoor condenser 20 enters the liquid storage tank 30, and the refrigerant flowing out of the refrigerant outlet of the liquid storage tank 30 flows into the first flow channel 11 from the inlet of the first flow channel 11 (that is, the first inlet 111), and flows into the refrigerant inlet of the battery pack cold plate 70 through the outlet of the first flow channel 11 (that is, the first outlet 112).

[0044] In the specific embodiments provided in this disclosure, reference is made to Figure 8 As shown, the vehicle thermal management system may further include an evaporator 40, the refrigerant inlet of the evaporator 40 being connected to the refrigerant outlet of the indoor condenser 20, and the refrigerant outlet of the evaporator 40 being connected to the refrigerant inlet of the outdoor compressor 10. When cooling the passenger compartment, the refrigerant flowing out of the refrigerant outlet of the indoor condenser 20 can also flow into the refrigerant inlet of the evaporator 40 to cool the passenger compartment of the vehicle, and the refrigerant flowing out of the refrigerant outlet of the evaporator 40 can return to the refrigerant inlet of the indoor compressor 10. In addition, referring to Figure 8 As shown, in order to control the cooling effect on the passenger compartment, a third expansion valve 50 can be provided between the refrigerant inlet of the evaporator 40 and the refrigerant outlet of the indoor condenser 20 to adjust the amount and pressure of the refrigerant entering the evaporator 40, thereby controlling the cooling effect on the passenger compartment. Figure 8 As shown, a second temperature and pressure sensor 60 can be provided near the refrigerant outlet of the evaporator 40 to collect temperature and pressure signals of the refrigerant flowing out of the refrigerant outlet of the evaporator 40, and then adjust the opening of the third expansion valve 50 according to the temperature and pressure signals of the second temperature and pressure sensor 60. It should be noted that the principles and structures of the evaporator 40, outdoor compressor 10, indoor condenser 20, liquid storage tank 30, etc. used in the vehicle air conditioning and refrigeration system are well known to those skilled in the art and are not described in detail in this disclosure.

[0045] Based on the above, reference Figures 1 to 8As shown, the first flow channel 11 has a first inlet 111 and a first outlet 112, the first inlet 111 is used to communicate with the refrigerant outlet of the indoor condenser, and the second outlet 122 is used to communicate with the refrigerant inlet of the battery pack cold plate 70, and the second flow channel 12 has a second inlet 121 and a second outlet 122, the second inlet 121 is used to communicate with the refrigerant outlet of the battery pack cold plate 70, and the second outlet 122 is used to communicate with the refrigerant inlet of the outdoor compressor. The first expansion valve 2 is arranged in the first flow channel 11, so that the refrigerant flowing into the first flow channel 11 from the first inlet 111 flows out of the first outlet 112 through the first expansion valve 2 through throttling or shutting off the first expansion valve 2; the second expansion valve 3 is arranged in the second flow channel 12, so that the refrigerant flowing into the second flow channel 12 from the second inlet 121 flows out of the second outlet 122 through the second expansion valve 3 through throttling or shutting off the second expansion valve 3, wherein the diameter of the second expansion valve 3 is larger than the diameter of the first expansion valve 2, so as to accurately control the evaporation pressure of the refrigerant in the battery pack cold plate 70.

[0046] The calibers of the first expansion valve 2 and the second expansion valve 3 can be selectively designed respectively. In some embodiments of the present disclosure, the caliber of the first expansion valve 2 can be 1.0 mm-2.5 mm, and the caliber of the second expansion valve 3 can be ≥10 mm. The caliber of the first expansion valve 2 can be arbitrarily selected between 1.0 mm and 2.5 mm. For example, the caliber of the first expansion valve 2 can be set to 1.0 mm, 1.3 mm, 1.4 mm, 1.7 mm, 1.9 mm, 2.1 mm or 2.5 mm. The caliber of the second expansion valve 3 can be arbitrarily selected within the range of ≥10 mm. For example, the caliber of the second expansion valve 3 can be 10 mm, 14 mm, 15 mm, 18 mm, etc. This disclosure does not impose any restrictions on this. Those skilled in the art can selectively design according to actual needs.

[0047] In the specific embodiments provided in this disclosure, reference is made to Figures 1 to 6As shown, the valve assembly integrated module may also include a sensor unit 4 and a control unit 5. The sensor unit 4 is installed within the second flow channel 12 and disposed between the second expansion valve 3 and the inlet of the second flow channel 12. It is used to collect temperature and pressure signals of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70. The control unit 5 is electrically connected to the sensor unit 4, the first expansion valve 2, and the second expansion valve 3, respectively, to adjust the opening of the first expansion valve 2 and / or the second expansion valve 3 based on the temperature and pressure signals from the sensor unit 4. The sensor unit 4 transmits the collected temperature and pressure signals of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70 to the control unit 5. The control unit 5 controls the opening of the first expansion valve 2 and / or the second expansion valve 3 in real time based on the temperature and pressure signals. This throttles the refrigerant in the battery pack cold plate 70 and adjusts the refrigerant evaporation pressure within the battery pack cold plate 70, thereby effectively resolving the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0048] In some embodiments, when the control unit 5 controls the opening of the first expansion valve 2 in real time according to the temperature signal and the pressure signal, the evaporation pressure of the refrigerant in the battery pack cold plate 70 is adjusted by throttling the refrigerant flowing into the battery pack cold plate 70, which helps to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0049] In other embodiments, the control unit 5 controls the opening of the second expansion valve 3 in real time according to the temperature signal and the pressure signal, so as to adjust the evaporation pressure of the refrigerant in the battery pack cold plate 70 by throttling the refrigerant flowing out of the battery pack cold plate 70, thereby helping to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling.

[0050] In some other embodiments, the control unit 5 controls the opening of the first expansion valve 2 and the second expansion valve 3 in real time according to the temperature signal and the pressure signal, so as to adjust the evaporation pressure of the refrigerant in the battery pack cold plate 70 by performing two throttling actions on the refrigerant entering and flowing out of the battery pack cold plate 70, thereby helping to solve the problem of poor temperature uniformity of the battery pack cold plate 70 under direct cooling, and helping to achieve the effect of controlling the internal temperature of the battery pack.

[0051] Below, the present disclosure will provide an exemplary description of the control unit 5 controlling the opening of the first expansion valve 2 and the second expansion valve 3 in real time based on a temperature signal and a pressure signal. The control unit 5 can also be connected to an external controller, such as a vehicle controller, to control the opening of the first expansion valve 2 and the second expansion valve 3 based on control instructions sent by the external controller. To facilitate connection between the control unit 5 and the external controller, the control unit 5 can include an interface 51 for connecting to the external controller. The interface 51 can be a LIN signal interface that outputs LIN protocol signals with two to three addresses, which are used to control the opening and closing degrees of the first expansion valve 2 and the second expansion valve 3, respectively. This reduces wiring harness costs and provides a high level of integration.

[0052] In the specific embodiment provided in the present disclosure, the sensor unit 4 is arranged on the side of the second flow channel 12 close to its own inlet, that is, the second inlet 121. In order to ensure further control of the refrigerant evaporation pressure in the battery pack cold plate 70, the sensor unit 4 is arranged on the side of the second flow channel 12 close to the second inlet 121, so that the temperature signal and pressure signal collected by the sensor unit 4 are the temperature signal and pressure signal of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70, so that the temperature signal and pressure signal collected by the sensor unit 4 are closer to the temperature signal and pressure signal of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70, which is conducive to accurately adjusting the opening of the first expansion valve 2 and the second expansion valve 3, thereby further effectively ensuring the temperature uniformity inside the battery pack cold plate 70 and higher reliability.

[0053] In the specific embodiments provided in the present disclosure, the sensor unit 4 can be constructed in any suitable manner. For example, the sensor unit 4 is constructed as a first temperature and pressure sensor 41, i.e., a PT sensor. The temperature signal and pressure signal of the refrigerant can be collected by a single first temperature and pressure sensor 41, and the number of parts is small. In other embodiments of the present disclosure, the sensor unit 4 can also be constructed to include a temperature sensor and a pressure sensor. The temperature sensor is used to collect the temperature signal of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70, and the pressure sensor is used to collect the pressure signal of the refrigerant flowing out of the refrigerant outlet of the battery pack cold plate 70. The control unit 5 is electrically connected to the temperature sensor, the pressure sensor, the first expansion valve 2, and the second expansion valve 3, respectively, to adjust the opening of the first expansion valve 2 and the second expansion valve 3 according to the temperature signal and the pressure signal of the sensor unit 4. In other embodiments of the present disclosure, the sensor unit 4 can also be constructed in other ways, and the present disclosure does not impose any restrictions on this.

[0054] In the specific embodiments provided in this disclosure, reference is made to Figures 1 to 6As shown, the control unit 5 is detachably mounted on the base 1, so that the control unit 5 is integrated on the base 1, which is convenient for assembly and makes the entire valve group integrated module occupy a smaller space. In addition, it is also beneficial to reduce the length of the cable connecting the control unit 5 and the base 1, which is beneficial to reduce costs and reduce weight.

[0055] The control unit 5 can be mounted on the base 1 in any suitable manner. In some embodiments of the present disclosure, the control unit 5 can be mounted on the base 1 by a snap-fit structure. The snap-fit structure includes a matching snap and a slot. One of the snap and the slot is provided on the control unit 5, and the other is provided on the base 1. During installation, it is sufficient to make the snap and the slot match. In other embodiments of the present disclosure, reference is made to Figure 1 As shown, the control unit 5 can be installed on the base 1 by means of fasteners 53, wherein the fasteners 53 pass through the mounting holes 52 of the control unit 5 in sequence and are connected to the base 1. The present disclosure does not impose any restrictions on this, and those skilled in the art can selectively design according to actual needs.

[0056] In the specific embodiments provided in this disclosure, reference is made to Figures 1 to 6 As shown, the valve assembly integrated module further includes a one-way valve 6, which is installed in the second flow channel 12 and disposed between the second expansion valve 3 and the outlet of the second flow channel 12. It is understood that the inlet of the one-way valve 6 is connected to the second inlet 121, and the outlet of the one-way valve 6 is connected to the second outlet 122. The provision of the one-way valve 6 can be used to prevent the refrigerant from flowing back into the battery pack cold plate 70, which would result in excessive refrigerant accumulation in the battery pack cold plate 70 and, in turn, reduce the amount of refrigerant flowing into the outdoor compressor 10 described below.

[0057] It should be noted that in actual use, when the temperature of the battery pack cold plate 70 is higher than a first preset value, the control unit 5 can control the second expansion valve 3 to fully open. At this time, the heat exchange capacity of the battery pack cold plate 70 is maximized, allowing the battery pack temperature to be reduced at the maximum rate, i.e., rapidly cooling the battery pack. When the temperature of the battery pack cold plate 70 is lower than the first preset value and higher than a second preset value, the control unit 5 can control the opening of the second expansion valve 3, for example, to half-open. In this case, the second expansion valve 3 throttles the refrigerant, regulating the refrigerant evaporation pressure within the battery pack cold plate 70 to prevent the battery pack temperature from falling too low while ensuring temperature uniformity within the battery pack. When the temperature of the battery pack cold plate 70 is lower than the second preset value, that is, when heat exchange is not required within the battery pack cold plate 70, the one-way valve 6 can prevent the low-pressure refrigerant from flowing back into the battery pack cold plate 70 through the second flow channel 12. This could result in excessive refrigerant accumulation within the battery pack cold plate 70, potentially leading to insufficient refrigerant for the outdoor compressor 10, as described below.

[0058] In the specific embodiments provided in the present disclosure, the caliber of the one-way valve 6 can be selectively designed. In some embodiments of the present disclosure, the caliber of the one-way valve 6 is ≥10 mm. The caliber of the one-way valve 6 can be arbitrarily selected within the range of ≥10 mm. For example, the caliber of the one-way valve 6 can be 10 mm, 11 mm, 15 mm, 18 mm, etc. To facilitate installation and avoid affecting the flow of refrigerant, the caliber of the one-way valve 6 can be set to the same as the caliber of the second expansion valve 3. This disclosure does not impose any restrictions on this, and those skilled in the art can selectively design according to actual needs.

[0059] The following will be combined with the Figure 1-7 Describe the process of two throttling of refrigerant. Figures 1 to 7 As shown, the refrigerant flowing out of the refrigerant outlet of the indoor condenser 20 described below, that is, the high-pressure liquid refrigerant, enters the first flow channel 11. When flowing through the first expansion valve 2, the setting of the first expansion valve 2 can perform a throttling effect on the refrigerant entering the battery pack cold plate 70 to reduce the pressure of the refrigerant. At this time, the refrigerant changes from high-pressure liquid refrigerant to low-pressure two-phase refrigerant. The low-pressure two-phase refrigerant is converted into a low-pressure gaseous refrigerant after heat exchange inside the battery pack cold plate 70, and then enters the second flow channel 12. The setting of the second expansion valve 3 can perform a secondary throttling effect on the refrigerant flowing out of the battery pack cold plate 70, so that a stepped pressure difference is generated between the outlet refrigerant of the battery pack cold plate 70 and the refrigerant at the refrigerant inlet of the outdoor compressor 10, so as to ensure that the pressure inside the battery pack cold plate 70 is not too low, thereby achieving the purpose of controlling the evaporation pressure of the refrigerant in the battery pack cold plate 70.

[0060] In addition, the present disclosure also provides a vehicle, which includes the above-mentioned vehicle thermal management system. The vehicle has the advantages of the above-mentioned valve group integrated module and the above-mentioned vehicle thermal management system.

[0061] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0063] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A valve group integrated module, characterized in that: The valve group integrated module includes a base, a first expansion valve and a second expansion valve. A first flow channel and a second flow channel are provided in the base. The first expansion valve is provided in the first flow channel, and the second expansion valve is provided in the second flow channel.

2. The valve group integrated module according to claim 1, characterized in that: The diameter of the second expansion valve is larger than that of the first expansion valve.

3. The valve group integrated module according to claim 2, characterized in that: The diameter of the first expansion valve is 1.0-2.5 mm, and / or, The diameter of the second expansion valve is ≥10 mm.

4. The valve group integrated module according to claim 1, characterized in that: The valve group integrated module further includes a sensor unit and a control unit. The sensor unit is installed in the second flow channel and is arranged between the second expansion valve and the inlet of the second flow channel to collect temperature signals and pressure signals of the refrigerant flowing into the second flow channel. The control unit is electrically connected to the sensor unit, the first expansion valve, and the second expansion valve, respectively, to adjust the opening of the first expansion valve and / or the second expansion valve according to the temperature signal and the pressure signal of the sensor unit.

5. The valve group integrated module according to claim 4, characterized in that: The sensor unit is arranged on a side of the second flow channel close to its own inlet.

6. The valve group integrated module according to claim 4, characterized in that: The sensor unit is designed as a first temperature and pressure sensor.

7. The valve group integrated module according to claim 4, characterized in that: The control unit is detachably mounted on the base.

8. The valve group integrated module according to claim 1, characterized in that: The valve group integrated module further includes a one-way valve installed in the second flow channel and arranged between the second expansion valve and the outlet of the second flow channel.

9. The valve group integrated module according to claim 8, characterized in that: The diameter of the one-way valve is ≥10mm.

10. A vehicle thermal management system, characterized in that: The vehicle thermal management system includes a battery pack cold plate and a valve group integrated module according to any one of claims 1 to 9, wherein the refrigerant inlet of the battery pack cold plate is connected to the outlet of the first flow channel, and the refrigerant outlet of the battery pack cold plate is connected to the inlet of the second flow channel. The first expansion valve and / or the second expansion valve are used to adjust the evaporation pressure of the refrigerant in the battery pack cold plate.

11. The vehicle thermal management system according to claim 10, characterized in that: The first expansion valve and / or the second expansion valve is used to adjust the refrigerant evaporation pressure in the battery pack cold plate to 6 bar to 9 bar.

12. The vehicle thermal management system according to claim 10, characterized in that: The vehicle thermal management system includes an outdoor compressor and an indoor condenser. The refrigerant outlet of the outdoor compressor is connected to the refrigerant inlet of the indoor condenser. The refrigerant outlet of the indoor condenser is connected to the inlet of the first flow channel. The refrigerant inlet of the outdoor compressor is connected to the outlet of the second flow channel.

13. The vehicle thermal management system according to claim 12, characterized in that: The vehicle thermal management system further includes a liquid storage tank, a refrigerant inlet of the liquid storage tank is communicated with a refrigerant outlet of the indoor condenser, and a refrigerant outlet of the liquid storage tank is communicated with an inlet of the first flow channel.

14. The vehicle thermal management system according to claim 12, wherein: The vehicle thermal management system further includes an evaporator, wherein a refrigerant inlet of the evaporator is communicated with a refrigerant outlet of the indoor condenser, and the refrigerant outlet of the evaporator is communicated with a refrigerant inlet of the outdoor compressor.

15. A vehicle, characterized in that: The vehicle comprises the vehicle thermal management system according to any one of claims 10-14.

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