A hybrid vehicle thermal management system

Abstract

This invention provides a hybrid vehicle thermal management system, belonging to the field of automotive technology, including a heat exchanger, a cooling circulation pipeline, a power component, and a temperature compensation pipeline. The heat exchanger has a heat exchange channel with a heat exchange inlet and a heat exchange outlet. The cooling circulation pipeline includes an inlet pipe, an outlet pipe, a first branch pipe, and a second branch pipe. One end of the inlet pipe is adapted to connect with the heat exchange outlet, and one end of the outlet pipe is adapted to connect with the heat exchange inlet. The power component is adapted to be installed on the inlet pipe or the outlet pipe. The two ends of the temperature compensation pipeline are connected to the inlet pipe and the outlet pipe respectively through reversing valves. The cooling circulation pipeline and the heat exchanger can cool the battery module, the DC-DC module, and the electric supercharger. Furthermore, by setting up the temperature compensation pipeline, temperature compensation of the battery module can be achieved, improving the operating characteristics of the battery module in low-temperature environments.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically relating to a thermal management system for hybrid vehicles. Background Technology

[0002] With the growing prominence of global energy issues, energy conservation and environmental protection have become important directions for the development of the automotive industry. Hybrid vehicles are a new generation of clean vehicles that combine low fuel consumption and low pollution. Among them, 48V mild hybrid vehicles can not only achieve emission reduction and fuel saving through functions such as acceleration assistance, energy recovery, start-stop, and coasting; at the same time, in order to maximize the performance of 48V mild hybrid vehicles, they are also equipped with an electric supercharger.

[0003] Unlike traditional cars that only require cooling of the engine or automatic transmission, 48V mild hybrid vehicles also require cooling of components such as the DC-DC module (48V / 12V DC-DC converter), electric supercharger, and battery to ensure that each component operates in an optimal temperature environment, thereby extending its service life.

[0004] In 48V mild hybrid vehicles, both the battery pack and the electric supercharger have high requirements for operating temperature. When the ambient temperature is high, the battery cells will malfunction or even be damaged, severely shortening the battery pack's lifespan and posing significant safety hazards. For the electric supercharger, high temperatures will significantly reduce its efficiency and shorten its lifespan. As the DC-DC module's temperature rises during operation, its output efficiency will be affected; further increases in temperature may even damage the controller. Therefore, cooling of the battery, DC-DC module, and electric supercharger is necessary.

[0005] It should be noted that charging batteries at low temperatures may lead to lithium plating, causing battery safety issues. Low temperatures also increase battery internal resistance, degrade performance, and shorten battery life. Therefore, low-temperature thermal compensation is necessary to minimize the battery's operational impact at extremely low temperatures. The lithium plating process occurs as follows: under low-temperature conditions, the ionic conductivity of the electrolyte decreases, significantly increasing the resistance to lithium ion insertion / extraction from the positive electrode and into the negative electrode, with a greater increase in resistance at the negative electrode, thus triggering lithium plating.

[0006] In the existing technology, the above-mentioned components need to be cooled by several sets of cooling circuits. However, the installation space inside the car is limited, and setting up several sets of circuits will make the structure of the car's thermal management system more complicated and difficult to arrange in space. Summary of the Invention

[0007] This invention provides a hybrid vehicle thermal management system, which aims to solve the technical problems of complex structure and difficult spatial arrangement of existing vehicle thermal management systems.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A hybrid vehicle thermal management system is provided, comprising:

[0010] A heat exchanger having a heat exchange channel having a heat exchange inlet and a heat exchange outlet;

[0011] The cooling circulation pipeline includes an inlet pipe, an outlet pipe, and a first branch pipe and a second branch pipe connected in parallel. Both ends of the first branch pipe are connected to the inlet pipe and the outlet pipe, respectively, and both ends of the second branch pipe are also connected to the inlet pipe and the outlet pipe, respectively. One end of the inlet pipe is adapted to connect to the heat exchange outlet, and one end of the outlet pipe is adapted to connect to the heat exchange inlet. The first branch pipe is adapted to contact the battery module and the DC-DC module, and the second branch pipe is adapted to contact the electronic supercharger.

[0012] A power component, adapted to be installed on the inlet pipe or the outlet pipe; and

[0013] The temperature compensation pipeline is connected to the inlet pipeline and the outlet pipeline at both ends via reversing valves; the temperature compensation pipeline is connected in parallel with the first branch pipeline and the second branch pipeline.

[0014] When cooling the battery module, DC-DC module, and electric supercharger, the reversing valve disconnects the temperature compensation pipe and connects the inlet pipe and the outlet pipe to the heat exchanger. The coolant in the inlet pipe, the first branch pipe, the second branch pipe, the outlet pipe, and the heat exchanger circulates under the drive of the power component to cool the battery module, DC-DC module, and electric supercharger.

[0015] When performing temperature compensation on the battery module, the reversing valve opens the temperature compensation pipe and disconnects both the inlet pipe and the outlet pipe from the heat exchanger; the coolant in the inlet pipe, the first branch pipe, the second branch pipe, the outlet pipe, and the temperature compensation pipe circulates under the drive of the power unit to remove the heat from the DC-DC module and the electric supercharger, and to perform thermal compensation on the battery module.

[0016] In one possible implementation, the heat exchanger further includes a refrigerant passage having a refrigerant inlet and a refrigerant outlet; the hybrid vehicle thermal management system also includes:

[0017] The refrigerant circulation pipeline is connected at both ends to the refrigerant inlet and the refrigerant outlet, respectively;

[0018] The refrigerant circulation pipe route is connected in sequence to the air conditioning compressor, condenser, and throttling device from the refrigerant outlet to the refrigerant inlet.

[0019] In some embodiments, a first temperature sensor is provided on the first branch pipe, and a second temperature sensor is provided on the second branch pipe; the hybrid vehicle thermal management system also includes a controller, which is electrically connected to the first temperature sensor, the second temperature sensor, the air conditioning compressor, and the power component, respectively;

[0020] Wherein, when the detected value of the first temperature sensor is greater than the first preset value, or when the detected value of the second temperature sensor is greater than the first preset value, the controller controls the power component to start, so that the coolant in the cooling circulation pipe circulates.

[0021] When the detected value of the first temperature sensor is greater than the second preset value, or when the detected value of the second temperature sensor is greater than the second preset value, the controller controls the air conditioner compressor to start, the refrigerant in the refrigerant circulation pipeline circulates and exchanges heat with the coolant in the heat exchanger and the cooling circulation pipeline; the second preset value is greater than the first preset value.

[0022] In some embodiments, the battery module is provided with a third temperature sensor, and the DC-DC module is provided with a fourth temperature sensor; both the third temperature sensor and the fourth temperature sensor are electrically connected to the controller.

[0023] In some embodiments, a flow valve is provided on the second branch pipe, and the flow valve is electrically connected to the controller; the flow valve is used to distribute the flow between the first branch pipe and the second branch pipe.

[0024] When the detected value of the first temperature sensor is greater than the detected value of the second temperature sensor, the controller controls the flow valve to operate, thereby reducing the flow rate of the second branch pipe and increasing the flow rate of the first branch pipe.

[0025] When the detected value of the first temperature sensor is less than the detected value of the second temperature sensor, the controller controls the flow valve to operate, increasing the flow rate in the second branch pipe and decreasing the flow rate in the first branch pipe.

[0026] In one possible implementation, a first temperature sensor is provided on the first branch pipe, and a second temperature sensor and a flow valve are provided on the second branch pipe; the hybrid vehicle thermal management system further includes a controller, which is electrically connected to the first temperature sensor, the second temperature sensor, the flow valve, and the power component respectively;

[0027] Wherein, when the detection value of the first temperature sensor is greater than the detection value of the second temperature sensor, the controller controls the flow valve to operate, so as to increase the flow rate of the first branch pipe and decrease the flow rate of the second branch pipe;

[0028] When the detected value of the first temperature sensor is less than the detected value of the second temperature sensor, the controller controls the flow valve to operate, thereby reducing the flow rate of the first branch pipe and increasing the flow rate of the second branch pipe.

[0029] In some embodiments, a flow sensor is provided on the inlet pipe or the outlet pipe, and the flow sensor is electrically connected to the controller;

[0030] The controller can control the rotational speed of the power component based on the detection value of the flow sensor, so as to increase or decrease the flow rate of the inlet pipe or the outlet pipe.

[0031] In some embodiments, a fan is rotatably mounted on the heat exchanger, and the fan is electrically connected to the controller;

[0032] Specifically, when the detected value of the first temperature sensor is greater than the first preset value, or when the detected value of the second temperature sensor is greater than the first preset value, the controller controls the fan to start, so as to accelerate the cooling of the coolant in the heat exchanger.

[0033] In one possible implementation, the hybrid vehicle thermal management system also includes:

[0034] The battery housing has a cavity suitable for accommodating the battery module and the DC-DC module; the interior of the battery housing is provided with a cooling water channel; wherein the cooling water channel is connected to the first branch pipe.

[0035] In one possible implementation, an expansion tank is connected to the inlet pipe or the outlet pipe, the expansion tank being used to discharge excess gas and coolant to reduce the pressure inside the pipe.

[0036] In this embodiment, when cooling the battery module, DC-DC module, and electric supercharger, the temperature compensation pipe is disconnected from the inlet and outlet channels. The coolant circulates within the inlet pipe, the first branch pipe, the second branch pipe, the outlet pipe, and the heat exchanger. The coolant can carry away the heat from the battery module, DC-DC module, and electric supercharger, causing the coolant temperature to rise. When the coolant flows in the heat exchanger, it can exchange heat with the outside environment, thereby lowering the coolant temperature. Repeating the above process can achieve continuous cooling of the battery module, DC-DC module, and electric supercharger. In winter, when the outside temperature is low, the temperature compensation pipe is connected to the inlet and outlet channels, while the inlet and outlet channels are disconnected from the heat exchanger. At this time, the coolant circulates through the inlet channel, the first branch pipe, the second branch pipe, the outlet pipe, and the temperature compensation pipe. The coolant absorbs heat from the DC-DC module and the electric supercharger, causing their temperatures to decrease and the coolant temperature to increase. When the coolant passes through the battery module, it raises the battery module's temperature, thus maintaining it within a certain operating temperature range and achieving thermal compensation. Because of the low outside temperature, the coolant exchanges heat with the environment during circulation, causing its temperature to decrease. Therefore, the coolant temperature remains within a certain range, allowing the battery module to operate within that range. This improves the battery module's performance in low-temperature environments, ensuring that the battery module temperature does not drop too low and maintaining a relatively ideal operating state even in cold environments, thereby extending the battery module's lifespan.

[0037] This invention provides a hybrid vehicle thermal management system. Compared with existing technologies, it cools the battery module, DC-DC module, and electric supercharger through cooling circulation pipes and heat exchangers. Furthermore, by incorporating temperature compensation pipes, it achieves temperature compensation for the battery module, improving its operating characteristics in low-temperature environments. In summary, this application enables the cooling and temperature compensation of the battery module, DC-DC module, and electric supercharger. The structure of this application is simple, reducing the space requirements of the vehicle, facilitating its installation within the vehicle's mounting space, resulting in a more compact vehicle structure and high assembly efficiency. Attached Figure Description

[0038] Figure 1 A schematic diagram of a hybrid vehicle thermal management system provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram illustrating the process of heat exchange between the coolant and the outside environment through a heat exchanger during cooling, as provided in an embodiment of the present invention for a hybrid vehicle thermal management system.

[0040] Figure 3This is a schematic diagram illustrating heat exchange between the coolant and refrigerant circulation pipelines during cooling, as provided in an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram illustrating thermal compensation of the battery module in a hybrid vehicle thermal management system provided by an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached diagram: 1. Heat exchanger; 2. Air conditioning compressor; 3. Condenser; 4. Throttling device; 5. First reversing valve; 6. Expansion tank; 7. Water pump; 8. Battery module; 9. Third temperature sensor; 10. DC-DC module; 11. Fourth temperature sensor; 12. First temperature sensor; 13. Battery housing; 14. Flow valve; 15. Electronic booster; 16. Second temperature sensor; 17. Flow sensor; 18. Second reversing valve. Detailed Implementation

[0043] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0044] Please see Figure 2 and Figure 4The present invention provides a hybrid vehicle thermal management system. The hybrid vehicle thermal management system includes a heat exchanger 1, a cooling circulation pipeline, a power component, and a temperature compensation pipeline. The heat exchanger 1 has a heat exchange channel with a heat exchange inlet and a heat exchange outlet. The cooling circulation pipeline includes an inlet pipe, an outlet pipe, and a first branch pipe and a second branch pipe connected in parallel. The two ends of the first branch pipe are connected to the inlet pipe and the outlet pipe, respectively, and the two ends of the second branch pipe are connected to the inlet pipe and the outlet pipe, respectively. One end of the inlet pipe is adapted to connect to the heat exchange outlet, and one end of the outlet pipe is adapted to connect to the heat exchange inlet. The first branch pipe is adapted to contact the battery module 8 and the DC-DC module 10, and the second branch pipe is adapted to contact the electric supercharger 15. The power component is adapted to be mounted on the inlet pipe or the outlet pipe. This embodiment uses the power component mounted on the inlet pipe as an example. The two ends of the temperature compensation pipeline are connected to the inlet pipe and the outlet pipe respectively via reversing valves. The temperature compensation pipe is connected in parallel with the first branch pipe and the second branch pipe. When cooling the battery module 8, DC-DC module 10, and electric supercharger 15, the reversing valve disconnects the temperature compensation pipe and connects both the inlet and outlet pipes to the heat exchanger 1. The coolant in the inlet pipe, first branch pipe, second branch pipe, outlet pipe, and heat exchanger 1 circulates under the drive of the power component to cool the battery module 8, DC-DC module 10, and electric supercharger 15. When performing temperature compensation on the battery module 8, the reversing valve connects the temperature compensation pipe and disconnects both the inlet and outlet pipes from the heat exchanger 1. The coolant in the inlet pipe, first branch pipe, second branch pipe, outlet pipe, and temperature compensation pipe circulates under the drive of the power component to remove heat from the DC-DC module 10 and electric supercharger 15, and to perform thermal compensation on the battery module 8.

[0045] In this embodiment, when cooling the battery module 8, DC-DC module 10, and electric supercharger 15, the temperature compensation pipe is disconnected from the inlet and outlet channels. The coolant circulates within the inlet pipe, the first branch pipe, the second branch pipe, the outlet pipe, and the heat exchanger 1. The coolant can carry away the heat from the battery module 8, DC-DC module 10, and electric supercharger 15, causing the coolant temperature to rise. When the coolant flows in the heat exchanger 1, it can exchange heat with the outside environment, thereby lowering the coolant temperature. Repeating the above process can achieve continuous cooling of the battery module 8, DC-DC module 10, and electric supercharger 15. When the outside temperature is low in winter, the temperature compensation pipe is connected to the inlet and outlet channels, while the inlet and outlet channels are disconnected from the heat exchanger 1. At this time, the coolant circulates through the inlet channel, the first branch pipe, the second branch pipe, the outlet pipe, and the temperature compensation pipe. The coolant absorbs heat from the DC-DC module 10 and the electric supercharger 15, causing their temperatures to decrease and the coolant temperature to increase. When the coolant passes through the battery module 8, it raises the temperature of the battery module 8, thus maintaining it within a certain operating temperature range and achieving thermal compensation. Due to the low outside temperature, the coolant exchanges heat with the outside environment during circulation, causing its temperature to decrease. Therefore, the coolant temperature remains within a certain range, enabling the battery module 8 to operate within that range, thereby improving its performance in low-temperature environments and extending its lifespan.

[0046] This invention provides a hybrid vehicle thermal management system. Compared with existing technologies, it can cool the battery module 8, DC-DC module 10, and electric supercharger 15 through cooling circulation pipes and heat exchanger 1. Furthermore, by setting up temperature compensation pipes, it can achieve temperature compensation for the battery module 8, improving its operating characteristics in low-temperature environments. In summary, this application can achieve the functions of cooling and temperature compensation for the battery module 8, DC-DC module 10, and electric supercharger 15. This application has a simple structure, reducing the space requirements of the vehicle, facilitating its installation within the vehicle's mounting space, resulting in a more compact vehicle structure and high assembly efficiency.

[0047] It should be noted that the power component can be a water pump 7. After the water pump 7 is started, it can provide power to the coolant, enabling the coolant to circulate. The reversing valves at both ends of the temperature compensation pipeline are a first reversing valve 5 and a second reversing valve 18, both of which can be three-way reversing valves. The first reversing valve 5 is connected to the inlet pipeline, and the second reversing valve 18 is connected to the outlet pipeline. By setting up a temperature compensation pipeline between the inlet and outlet pipelines and connecting it through the first reversing valve 5 and the second reversing valve 18, the circulation path of the coolant can be selected according to the actual situation. When cooling is required, the first reversing valve 5 and the second reversing valve 18 disconnect the temperature compensation pipeline and connect the inlet and outlet pipelines to the heat exchanger 1. When thermal compensation of the battery module 8 is required, the first reversing valve 5 and the second reversing valve 18 open the temperature compensation pipeline and disconnect the inlet and outlet pipelines from the heat exchanger 1.

[0048] In addition, by integrating the battery module 8, DC-DC module 10, and electric supercharger 15 into a cooling circuit, the DC-DC module 10 and electric supercharger 15 can be cooled at the same time as the battery module 8. This reduces the number of components in the vehicle's thermal management system, improves the integration level of the vehicle's thermal management system, and saves space in the vehicle's layout.

[0049] In some embodiments, such as Figure 1 and Figure 3 As shown, the heat exchanger 1 also has a refrigerant passage with a refrigerant inlet and a refrigerant outlet; the hybrid vehicle thermal management system also includes a refrigerant circulation pipeline, with both ends of the refrigerant circulation pipeline connected to the refrigerant inlet and the refrigerant outlet respectively; wherein, the refrigerant circulation pipeline is connected in sequence to the air conditioning compressor 2, the condenser 3 and the throttling device 4 in the direction from the refrigerant outlet to the refrigerant inlet.

[0050] It should be noted that the working principle of the refrigerant circulation pipeline is as follows: the liquid refrigerant absorbs heat from the coolant and vaporizes in the heat exchanger 1. Then, the air conditioning compressor 2 compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, and further delivers this gaseous refrigerant to the condenser 3, where it dissipates heat and becomes a room-temperature, high-pressure liquid refrigerant. Subsequently, under the throttling and pressure-reducing effect of the throttling device 4, the room-temperature, high-pressure liquid refrigerant becomes a low-temperature, low-pressure liquid refrigerant, and further enters the heat exchanger 1. During the process of the refrigerant flowing from the throttling device 4 to the heat exchanger 1, the sudden increase in space and decrease in pressure cause the liquid refrigerant to vaporize, becoming a low-temperature gaseous refrigerant, thereby absorbing a large amount of heat to lower the temperature of the coolant and achieve the purpose of cooling. The air conditioning compressor 2, condenser 3, and throttling device 4 are all existing technologies and will not be described in detail here.

[0051] Furthermore, by setting up a refrigerant circulation pipeline, rapid cooling of the battery module 8, DC-DC module 10, and electronic supercharger 15 is achieved, enabling these components to operate in a relatively comfortable temperature environment (e.g., 20-35℃) within a short time, thus improving cooling efficiency. Switching between two cooling modes can adapt to cooling requirements under different operating conditions, achieving efficient resource utilization and avoiding energy waste to a certain extent.

[0052] In some embodiments, such as Figure 3 As shown, a first temperature sensor 12 is installed on the first branch pipe, and a second temperature sensor 16 is installed on the second branch pipe. The hybrid vehicle thermal management system also includes a controller, which is electrically connected to the first temperature sensor 12, the second temperature sensor 16, the air conditioning compressor 2, and the power unit. When the detection value of the first temperature sensor 12 is greater than a first preset value, or when the detection value of the second temperature sensor 16 is greater than the first preset value, the controller controls the power unit to start, so that the coolant in the cooling circulation pipe circulates. When the detection value of the first temperature sensor 12 is greater than a second preset value, or when the detection value of the second temperature sensor 16 is greater than a second preset value, the controller controls the air conditioning compressor 2 to start, so that the refrigerant in the refrigerant circulation pipe circulates and exchanges heat with the coolant in the cooling circulation pipe at the heat exchanger 1. The second preset value is greater than the first preset value.

[0053] It should be understood that when the temperature of the first branch pipe is between the first and second preset values, or the temperature of the second branch pipe is between the first and second preset values, the coolant exchanges heat with the outside through heat exchanger 1, thus achieving a balance between the coolant and the battery module 8, DC-DC module 10, electric supercharger 15, and heat exchanger 1, and meeting the cooling requirements of the battery module 8, DC-DC module 10, and electric supercharger 15. When the temperature of the first branch pipe is greater than the second preset value, or the temperature of the second branch pipe is greater than the second preset value, heat exchange with the outside through heat exchanger 1 alone is insufficient to meet the cooling requirements. Therefore, it is necessary to activate the refrigerant circulation pipeline, through which the refrigerant exchanges heat with the coolant, to meet the cooling requirements of the battery module 8, DC-DC module 10, and electric supercharger 15.

[0054] In addition, the water pump 7 is always in operation when cooling the battery module 8, DC-DC module 10 and electric supercharger 15, so that the coolant is always in a circulating flow process.

[0055] In some embodiments, such as Figure 3 As shown, the battery module 8 is equipped with a third temperature sensor 9, and the DC-DC module 10 is equipped with a fourth temperature sensor 11; both the third temperature sensor 9 and the fourth temperature sensor 11 are electrically connected to the controller.

[0056] It should be noted that the third temperature sensor 9 is used to detect the temperature of the battery module 8, and the fourth temperature sensor 11 is used to detect the temperature of the DC-DC module 10. When the detected value of any one of the first temperature sensor 12, the second temperature sensor 16, the third temperature sensor 9, and the fourth temperature sensor 11 exceeds a first preset value, the controller controls the water pump 7 to start, so that the coolant in the cooling circulation pipe circulates to cool the battery module 8, the DC-DC module 10, and the electronic booster 15.

[0057] When the detection value of any one of the first temperature sensor 12, the second temperature sensor 16, the third temperature sensor 9, and the fourth temperature sensor 11 is greater than the second preset value, the controller controls the air conditioning compressor 2 to start, the refrigerant in the refrigerant circulation pipeline circulates and exchanges heat with the coolant in the cooling circulation pipeline in the heat exchanger 1 to accelerate the cooling of the coolant, thus facilitating the cooling of the battery module 8, the DC-DC module 10, and the electronic supercharger 15.

[0058] In addition, by setting the first temperature sensor 12, the second temperature sensor 16, the third temperature sensor 9 and the fourth temperature sensor 11, the two cooling modes can be automatically switched. The response is fast and the intelligence level is high, which can improve the user experience.

[0059] In some embodiments, such as Figure 3 As shown, a flow valve 14 is provided on the second branch pipe, and the flow valve 14 is electrically connected to the controller. The flow valve 14 is used to distribute the flow of the first branch pipe and the second branch pipe. When the detection value of the first temperature sensor 12 is greater than the detection value of the second temperature sensor 16, the controller controls the flow valve 14 to operate, thereby reducing the flow of the second branch pipe and increasing the flow of the first branch pipe. When the detection value of the first temperature sensor 12 is less than the detection value of the second temperature sensor 16, the controller controls the flow valve 14 to operate, thereby increasing the flow of the second branch pipe and decreasing the flow of the first branch pipe.

[0060] It should be noted that by adjusting the opening of the flow valve 14, the flow rate of coolant flowing through the first branch pipe and the second branch pipe can be distributed to achieve optimal cooling for the battery module 8, DC-DC module 10, and electric supercharger 15. This flow distribution method can achieve efficient cooling of the battery module 8, DC-DC module 10, and electric supercharger 15 according to operating conditions; it further enhances the functionality of the automotive heat pipe system and meets the needs of various automotive operating conditions.

[0061] In some embodiments, such as Figure 2 and Figure 4As shown, a first temperature sensor 12 is installed on the first branch pipe, and a second temperature sensor 16 and a flow valve 14 are installed on the second branch pipe. The hybrid vehicle thermal management system also includes a controller, which is electrically connected to the first temperature sensor 12, the second temperature sensor 16, the flow valve 14, and the power unit. When the detection value of the first temperature sensor 12 is greater than the detection value of the second temperature sensor 16, the controller controls the flow valve 14 to increase the flow rate in the first branch pipe and decrease the flow rate in the second branch pipe. When the detection value of the first temperature sensor 12 is less than the detection value of the second temperature sensor 16, the controller controls the flow valve 14 to decrease the flow rate in the first branch pipe and increase the flow rate in the second branch pipe. A flow sensor 17 is installed on the inlet or outlet pipe and is electrically connected to the controller. The controller can control the rotation speed of the power unit based on the detection value of the flow sensor 17 to increase or decrease the flow rate in the inlet or outlet pipe. This embodiment uses the flow sensor 17 installed on the outlet pipe as an example for explanation.

[0062] It should be noted that when the coolant exchanges heat with the outside through the heat exchanger 1, the controller adjusts the opening of the flow valve 14 in real time according to the relationship between the detection values ​​of the first temperature sensor 12 and the second temperature sensor 16, so as to achieve efficient cooling of the battery module 8, the DC-DC module 10 and the electronic supercharger 15.

[0063] In addition, when performing thermal compensation on the battery module 8, the controller can achieve the optimal thermal compensation method by adjusting the opening of the flow valve 14 and controlling the speed of the water pump 7, based on the information collected by the first temperature sensor 12, the second temperature sensor 16 and the flow sensor 17.

[0064] In some embodiments, such as Figure 2 As shown, a fan is rotatably mounted on the heat exchanger 1, and the fan is electrically connected to the controller. When the detection value of the first temperature sensor 12 is greater than the first preset value, or the detection value of the second temperature sensor 16 is greater than the first preset value, the controller controls the fan to start to accelerate the cooling of the coolant in the heat exchanger 1.

[0065] It should be noted that when the detected value of any one of the first temperature sensor 12, the second temperature sensor 16, the third temperature sensor 9, and the fourth temperature sensor 11 is greater than the first preset value, the controller controls the fan to start so that the fan runs at high speed, thereby prompting the heat exchanger 1 to cool the coolant quickly.

[0066] In some embodiments, such as Figure 1As shown, the hybrid vehicle thermal management system also includes a battery housing 13, which has a cavity suitable for accommodating the battery module 8 and the DC-DC module 10; the interior of the battery housing 13 is provided with cooling water channels; wherein the cooling water channels are connected to the first branch pipe.

[0067] It should be understood that integrating the battery module 8 and the DC-DC module 10 into a single battery housing 13 allows them to share the cooling channels of the housing 13, with the coolant passing through the battery module 8 first and then the DC-DC module 10 within the cooling channels. The structure described in this application solves the problem of complex structures in existing products, achieving simplification and weight reduction, and also reducing thermal management costs.

[0068] In some embodiments, such as Figure 1 As shown, an expansion tank 6 is connected to the inlet or outlet pipe. The expansion tank 6 is used to discharge excess gas and coolant to reduce the pressure inside the pipe.

[0069] It should be understood that the expansion tank 6 is prior art and will not be described in detail here. The working principle of the expansion tank 6 in this application is as follows: when cooling the battery module 8, DC-DC module 10 and electronic booster 15, the coolant passes through the expansion tank 6; when the pressure in the pipeline is too high or the coolant is excessive, the excess gas and coolant will flow out from the bypass channel of the expansion tank 6, which to a certain extent avoids the adverse situation of pipeline rupture caused by excessive water pressure.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hybrid vehicle thermal management system, characterized by, The heat exchanger comprises a heat exchange channel having a heat exchange inlet and a heat exchange outlet. The cooling circulation pipeline comprises a liquid inlet pipeline, a liquid outlet pipeline, and a first branch pipeline and a second branch pipeline connected in parallel with each other; two ends of the first branch pipeline are connected to the liquid inlet pipeline and the liquid outlet pipeline respectively, and two ends of the second branch pipeline are connected to the liquid inlet pipeline and the liquid outlet pipeline respectively; one end of the liquid inlet pipeline is adapted to be connected to the heat exchange outlet, and one end of the liquid outlet pipeline is adapted to be connected to the heat exchange inlet; the first branch pipeline is adapted to be in contact with the battery module and the DCDC module, and the second branch pipeline is adapted to be in contact with the electronic supercharger; The power member is adapted to be arranged on the liquid inlet pipeline or the liquid outlet pipeline; and The temperature compensation pipeline is connected to the liquid inlet pipeline and the liquid outlet pipeline through two reversing valves respectively; the temperature compensation pipeline is connected in parallel with the first branch pipeline and the second branch pipeline. When the battery module, the DCDC module, and the electronic supercharger are cooled, the reversing valves disconnect the temperature compensation pipeline, and the liquid inlet pipeline and the liquid outlet pipeline are both connected to the heat exchanger; the cooling liquid in the liquid inlet pipeline, the first branch pipeline, the second branch pipeline, the liquid outlet pipeline, and the heat exchanger circulates under the drive of the power member to cool the battery module, the DCDC module, and the electronic supercharger. When the battery module is temperature-compensated, the reversing valves connect the temperature compensation pipeline, and the liquid inlet pipeline and the liquid outlet pipeline are both disconnected from the heat exchanger; the cooling liquid in the liquid inlet pipeline, the first branch pipeline, the second branch pipeline, the liquid outlet pipeline, and the temperature compensation pipeline circulates under the drive of the power member to take away the heat of the DCDC module and the electronic supercharger and to compensate the temperature of the battery module. The hybrid vehicle thermal management system further comprises a battery box having a receiving cavity adapted to accommodate the battery module and the DCDC module; the battery box is internally provided with a cooling water channel; the cooling water channel is connected to the first branch pipeline. The first branch pipeline is provided with a first temperature sensor, and the second branch pipeline is provided with a second temperature sensor; the hybrid vehicle thermal management system further comprises a controller. The battery module is provided with a third temperature sensor, and the DCDC module is provided with a fourth temperature sensor; the third temperature sensor and the fourth temperature sensor are electrically connected to the controller. The heat exchanger is provided with a fan rotating thereon; the fan is electrically connected to the controller. When the detection value of the first temperature sensor is greater than a first preset value, or the detection value of the second temperature sensor is greater than a first preset value, the controller controls the fan to start to accelerate the cooling of the cooling liquid in the heat exchanger. The heat exchanger further comprises a refrigerant channel having a refrigerant inlet and a refrigerant outlet; the hybrid vehicle thermal management system further comprises:

2. The hybrid vehicle thermal management system of claim 1, wherein, A refrigerant circulation pipeline connected to the refrigerant inlet and the refrigerant outlet at two ends respectively. ​ The refrigerant circulation pipeline is sequentially connected with the air conditioner compressor, the condenser and the throttling element in sequence from the refrigerant outlet to the refrigerant inlet.

3. The hybrid vehicle thermal management system of claim 2, wherein, The controller is electrically connected with the first temperature sensor, the second temperature sensor, the air conditioner compressor and the power element respectively; When the detection value of the first temperature sensor is greater than a first preset value or the detection value of the second temperature sensor is greater than the first preset value, the controller controls the power element to start, so that the cooling liquid in the cooling circulation pipeline circulates. When the detection value of the first temperature sensor is greater than a second preset value or the detection value of the second temperature sensor is greater than the second preset value, the controller controls the air conditioner compressor to start, the refrigerant in the refrigerant circulation pipeline circulates, and the heat exchanger exchanges heat with the cooling liquid in the cooling circulation pipeline; the second preset value is greater than the first preset value.

4. The hybrid vehicle thermal management system of claim 3, wherein, The second branch pipeline is provided with a flow valve, and the flow valve is electrically connected with the controller; the flow valve is used for distributing the flow of the first branch pipeline and the second branch pipeline; When the detection value of the first temperature sensor is greater than the detection value of the second temperature sensor, the controller controls the flow valve to act, and the flow of the second branch pipeline is reduced, and the flow of the first branch pipeline is increased; When the detection value of the first temperature sensor is less than the detection value of the second temperature sensor, the controller controls the flow valve to act, and the flow of the second branch pipeline is increased, and the flow of the first branch pipeline is reduced.

5. The hybrid vehicle thermal management system of claim 1, wherein, The first branch pipeline is provided with a first temperature sensor, and the second branch pipeline is provided with a second temperature sensor and a flow valve; the hybrid vehicle thermal management system further comprises a controller, and the controller is electrically connected with the first temperature sensor, the second temperature sensor, the flow valve and the power element respectively; When the detection value of the first temperature sensor is greater than the detection value of the second temperature sensor, the controller controls the flow valve to act, so that the flow of the first branch pipeline is increased, and the flow of the second branch pipeline is reduced; When the detection value of the first temperature sensor is less than the detection value of the second temperature sensor, the controller controls the flow valve to act, and the flow of the first branch pipeline is reduced, and the flow of the second branch pipeline is increased.

6. The hybrid vehicle thermal management system of claim 5, wherein, The inlet pipeline or the outlet pipeline is provided with a flow sensor, and the flow sensor is electrically connected with the controller; The controller can control the rotating speed of the power element according to the detection value of the flow sensor, so as to increase or reduce the flow rate of the inlet pipeline or the outlet pipeline.

7. The hybrid vehicle thermal management system of any one of claims 1-6, wherein, The inlet pipeline or the outlet pipeline is communicated with an expansion water kettle, and the expansion water kettle is used for discharging excess gas and cooling liquid, so as to reduce the pressure in the pipeline.

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