Heat management system and vehicle having the same

Abstract

This invention discloses a thermal management system and a vehicle having the same. The thermal management system includes a compressor and a first heat exchanger. The compressor has an exhaust port and an intake port. The first heat exchanger is adapted to exchange heat with a battery, and its two ends are connected to the exhaust port and the intake port, respectively. The compressor is configured to control the temperature T1 of the refrigerant at the inlet of the first heat exchanger to satisfy T2 < T1 < T3 in a uniform temperature mode, where T2 is the lowest temperature of the battery and T3 is the highest temperature of the battery. The thermal management system of this invention, by controlling the temperature of the refrigerant at the inlet of the first heat exchanger, achieves uniform temperature treatment of the battery, thereby reducing the temperature difference of the battery, resulting in better charging uniformity and extending the battery's service life.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a thermal management system and a vehicle having the same. Background Technology

[0002] In the prior art, in order to maintain the battery temperature within a suitable range during operation, a thermal management system is usually set up to regulate the battery temperature, which helps to improve the battery's performance.

[0003] However, existing thermal management systems typically adjust the battery temperature to a fixed threshold and then stop heating the battery when heating it during low-temperature charging. This often results in a large temperature difference within the battery, which continues to increase with high-current charging, affecting the uniformity of battery charging and shortening the battery's lifespan. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a thermal management system that, while regulating the temperature of the battery, also reduces the temperature difference within the battery, thereby improving charging uniformity and extending battery life. This solves the technical problem of large temperature differences in the battery after temperature regulation in existing thermal management systems.

[0005] The present invention also aims to provide a vehicle having the above-described thermal management system.

[0006] A thermal management system according to an embodiment of the present invention includes: a compressor having an exhaust port and an intake port; a first heat exchanger adapted to exchange heat with a battery, the two ends of the first heat exchanger being respectively connected to the exhaust port and the intake port; the compressor is configured to: in a uniform temperature mode, control the temperature T1 of the refrigerant at the inlet of the first heat exchanger to satisfy T2 < T1 < T3, wherein T2 is the lowest temperature of the battery and T3 is the highest temperature of the battery.

[0007] According to the thermal management system of this invention, in uniform temperature mode, the temperature T1 of the refrigerant at the inlet of the first heat exchanger is controlled by a compressor and kept between the battery's minimum temperature T2 and maximum temperature T3. Thus, when the refrigerant flows into the first heat exchanger and exchanges heat with the battery, it can raise the battery's minimum temperature and lower its maximum temperature, achieving uniform temperature control of the battery. This reduces the temperature difference between batteries, resulting in better charging uniformity and extending battery life. In other words, the thermal management system of this application can both regulate the battery temperature and perform uniform temperature control to reduce the battery's temperature difference.

[0008] In some embodiments, the thermal management system further includes a controller electrically connected to the compressor, the controller being configured to control the speed of the compressor in the uniform temperature mode.

[0009] In some embodiments, the temperature equalization mode includes a first temperature equalization mode and a second temperature equalization mode. In the first temperature equalization mode, a first end of the first heat exchanger is connected to the exhaust port, and a second end of the first heat exchanger is connected to the intake port. In the second temperature equalization mode, a first end of the first heat exchanger is connected to the intake port, and a second end of the first heat exchanger is connected to the exhaust port.

[0010] In some embodiments, the thermal management system includes an adjustable valve, the first end of which is connected to the exhaust port via a first electrically controlled valve and to the intake port via a second electrically controlled valve, and the second end of which is connected to the first end of the first heat exchanger.

[0011] In some embodiments, the thermal management system includes a throttling element, a first end of which is connected to a second end of the first heat exchanger, and the second end of which is adapted to be connected to the first end of the heat exchanger via a first unidirectional flow channel and to be connected to the second end of the heat exchanger via a second unidirectional flow channel; wherein the refrigerant flows in opposite directions in the first and second unidirectional flow channels, the second end of the heat exchanger is used to be connected to the intake port via a third electrically controlled valve, and the first end of the heat exchanger is used to be connected to the exhaust port via a fourth electrically controlled valve.

[0012] In some embodiments, when a first condition is met, the controller is used to control the first solenoid valve to open, the second solenoid valve to close, the third solenoid valve to open, and the fourth solenoid valve to close. The first condition includes: ambient temperature ≤ first set temperature H1, second set temperature T4 ≤ battery minimum temperature T2 ≤ third set temperature T5, and battery temperature difference ΔT > first set threshold.

[0013] In some embodiments, when a second condition is met, the controller is used to control the first solenoid valve to close, the second solenoid valve to open, the third solenoid valve to close, and the fourth solenoid valve to open. The second condition includes: ambient temperature ≤ first set temperature H1, third set temperature T5 < battery minimum temperature T2 ≤ fourth set temperature T6, and battery temperature difference ΔT > first set threshold.

[0014] In some embodiments, the controller is further configured to: control the thermal management system to exit the temperature equalization mode when a third condition is met, the third condition including battery temperature difference ΔT ≤ a second set threshold, wherein the battery temperature difference ΔT = T3 - T2.

[0015] In some embodiments, the controller is further configured to: control the thermal management system to the uniform temperature mode when a fourth condition is met, the fourth condition including battery temperature difference ΔT > a first set threshold, wherein the battery temperature difference ΔT = T3 - T2.

[0016] In some embodiments, the thermal management system further includes: a coolant subsystem, the coolant subsystem including a first heat exchange channel, a circulating pump and a second heat exchange element connected to the first heat exchange channel, the second heat exchange element being capable of heat exchange with the electronic control module; and a second heat exchange channel, the second heat exchange channel being connected between the first heat exchange element and the compressor, the second heat exchange channel being used for heat exchange with the first heat exchange channel.

[0017] In some embodiments, a first end of the first heat exchanger is connected to the exhaust port of the compressor, and a second end of the first heat exchanger is connected to the intake port through the second heat exchange channel; in a first heating mode, the controller is used to control the circulation pump to start so that the first heat exchange channel and the second heat exchange channel exchange heat.

[0018] In some embodiments, in the internal circulation mode, the controller is used to control the thermal management system to operate the temperature equalization mode and the circulation pump to start, wherein the internal circulation mode is the mode when the lowest temperature T2 of the battery reaches the fifth set temperature.

[0019] In some embodiments, the controller is further configured to: control the thermal management system to exit the internal circulation mode when a fifth condition is met, the fifth condition including the coolant temperature of the coolant subsystem being lower than a sixth set temperature.

[0020] In some embodiments, the controller is further configured to: control the thermal management system to enter a self-heating mode, in which the battery is charged and discharged to perform heating.

[0021] The vehicle according to an embodiment of the present invention includes the aforementioned thermal management system.

[0022] According to the vehicle of the present invention, by adopting the aforementioned thermal management system, the temperature of the battery located in the vehicle can be regulated and the temperature difference of the battery can be reduced, so as to ensure the working performance of the vehicle to a certain extent, extend the service life of the vehicle, and reduce the operating cost of the vehicle.

[0023] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of a thermal management system according to some embodiments of the present invention.

[0026] Figure 2 This is a schematic diagram of the thermal management system in the first uniform temperature mode according to some embodiments of the present invention.

[0027] Figure 3 This is a schematic diagram of the thermal management system entering the second temperature equalization mode according to some embodiments of the present invention.

[0028] Figure label:

[0029] 1000. Thermal Management System;

[0030] 100. Compressor;

[0031] 110. Exhaust port; 120. Intake port;

[0032] 200. First heat exchanger;

[0033] 300. Coolant Subsystem;

[0034] 310. Circulating pump; 320. First heat exchange channel;

[0035] 330. Liquid reservoir; 340. Second temperature sensor; 350. Radiator; 360. Electric fan;

[0036] 400. Second heat exchange flow channel;

[0037] 500. Adjustable valve;

[0038] 610, First solenoid valve; 620, Second solenoid valve; 630, Third solenoid valve; 640, Fourth solenoid valve;

[0039] 700, Throttling element;

[0040] 800. Heat exchanger;

[0041] 910. First one-way flow channel; 911. First one-way valve;

[0042] 920. Second one-way flow channel; 921. Second one-way valve;

[0043] 930. Gas-liquid separator;

[0044] 2000, Electrical control module. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] The thermal management system 1000 of the present invention is described below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, a thermal management system 1000 according to an embodiment of the present invention includes: a compressor 100 and a first heat exchanger 200.

[0049] Among them, such as Figure 1 As shown, the compressor 100 has an exhaust port 110 and an intake port 120. The exhaust port 110 is used to discharge the refrigerant inside the compressor 100, and the intake port 120 is used to introduce the refrigerant into the compressor 100, thereby ensuring that the refrigerant can circulate, so as to use the refrigerant to regulate the temperature of the battery, so that the battery temperature can be maintained within a suitable temperature range, thereby ensuring the working performance of the battery to a certain extent.

[0050] Combination Figure 1 , Figure 2 and Figure 3 As shown, the first heat exchanger 200 is adapted to exchange heat with the battery. Both ends of the first heat exchanger 200 are connected to the exhaust port 110 and the intake port 120, respectively. This means that the first heat exchanger 200 has two ends, which are respectively connected to the exhaust port 110 and the intake port 120 of the compressor 100. This ensures that the refrigerant can circulate between the compressor 100 and the first heat exchanger 200, thereby enabling the first heat exchanger 200 to exchange heat with the battery. This achieves the purpose of heating or cooling the battery using the first heat exchanger 200, thus maintaining the battery temperature within a suitable range. This, to a certain extent, ensures the battery's operating performance, improves battery safety, and extends battery life.

[0051] In some embodiments, the first heat exchanger 200 has a first end and a second end disposed opposite to each other. The first end of the first heat exchanger 200 is connected to one of the exhaust port 110 and the intake port 120, and the second end of the first heat exchanger 200 is connected to the other of the exhaust port 110 and the intake port 120. The first heat exchanger 200 exchanges heat with the battery. This means that the first heat exchanger 200 has a first end and a second end, and when the first end of the first heat exchanger 200 is connected to the exhaust port 110 of the compressor 100, the second end of the first heat exchanger 200 is connected to the intake port 120 of the compressor 100 (e.g., ...). Figure 2 As shown), at this time, the refrigerant in the compressor 100 can flow through the first end of the first heat exchanger 200 to the second end of the first heat exchanger 200, and flow out through the suction port 120 of the compressor 100 back to the compressor 100; when the first end of the first heat exchanger 200 is connected to the suction port 120 of the compressor 100, the second end of the first heat exchanger 200 is connected to the discharge port 110 of the compressor 100 (as shown). Figure 3 As shown in the figure, the refrigerant in the compressor 100 can flow from the second end of the first heat exchanger 200 to the first heat exchanger 200, and then flow out through the first end of the first heat exchanger 200, and flow back to the compressor 100 through the suction port 120 of the compressor 100. In this way, while controlling the flow of refrigerant from the compressor 100 to the first heat exchanger 200, the temperature of the refrigerant flowing into the first heat exchanger 200 can also be controlled. Moreover, the above settings can also ensure that the refrigerant can circulate between the compressor 100 and the first heat exchanger 200.

[0052] It should be noted that, since the first heat exchanger 200 exchanges heat with the battery, when the refrigerant flows to the first heat exchanger 200 and the temperature of the refrigerant within the first heat exchanger 200 is controlled, the refrigerant can be used to exchange heat with the battery, thereby achieving the purpose of heating or cooling the battery using the first heat exchanger 200, so that the battery temperature can be maintained within a suitable temperature range, thus ensuring the battery's working performance to a certain extent.

[0053] The compressor 100 is configured to control the temperature T1 of the refrigerant at the inlet of the first heat exchanger 200 to satisfy: T2 < T1 < T3, where T2 is the lowest temperature of the battery and T3 is the highest temperature of the battery. In other words, the thermal management system 1000 has a uniform temperature mode. In this mode, the compressor 100 can control the temperature of the refrigerant at the inlet of the first heat exchanger 200 based on the battery's minimum and maximum temperatures, ensuring that the refrigerant temperature T1 at the inlet of the first heat exchanger 200 is greater than the battery's minimum temperature T2 and less than the battery's maximum temperature T3. This adjusts the temperature difference between the refrigerant entering the first heat exchanger 200 and the battery temperature. Specifically, when the thermal management system 1000 operates in uniform temperature mode, it controls the temperature of the refrigerant flowing to the first heat exchanger 200 to be between the battery's minimum and maximum temperatures. Thus, when the refrigerant flows to the first heat exchanger 200 and exchanges heat with the battery, it can raise the battery's minimum temperature and lower the battery's maximum temperature, thereby reducing the temperature difference between the battery's minimum and maximum temperatures. This achieves the purpose of uniform battery temperature treatment, resulting in better charging uniformity and extending battery life.

[0054] Therefore, the temperature equalization mode mentioned here can be understood as the compressor 100 controlling the temperature of the refrigerant at the inlet of the first heat exchanger 200 according to the battery temperature to achieve temperature equalization of the battery using the refrigerant. In other words, it uses the refrigerant entering the first heat exchanger 200 to raise the minimum temperature of the battery and lower the maximum temperature of the battery, thereby reducing the difference between the minimum and maximum temperatures of the battery, achieving the purpose of temperature equalization of the battery, so that the battery has better charging uniformity and extends the battery's service life.

[0055] In other words, the thermal management system 1000 of this application can not only regulate the temperature of the battery, but also perform temperature equalization treatment on the battery to reduce the temperature difference of the battery.

[0056] In some embodiments, the thermal management system 1000 can be controlled to enter a first mode by adjusting the speed of the compressor 100, so that the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 can satisfy: T2 < T1 < T3.

[0057] In other words, the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 can be adjusted by adjusting the speed of the compressor 100, so that T1 satisfies: T2 < T1 < T3.

[0058] As can be seen from the above structure, the thermal management system 1000 of this embodiment of the invention controls the temperature of the refrigerant by combining the lowest temperature and the highest temperature of the battery when adjusting the battery temperature, so as to achieve a uniform temperature effect, thereby reducing the temperature difference between the cells in the battery. A smaller temperature difference can make the battery have better charging uniformity and help extend the battery's service life.

[0059] At the same time, the temperature equalization process can also increase the minimum temperature of the battery, thereby accelerating the charging rate of the battery, reducing the charging time of the battery, and ensuring the working performance of the battery to a certain extent.

[0060] Furthermore, by using the first heat exchanger 200 to exchange heat with the battery, the refrigerant can be directly placed inside the first heat exchanger 200 to exchange heat with the battery, without coolant as an intermediate heat exchange medium. This achieves the purpose of regulating the battery temperature through direct cooling and heating, thereby improving the heat exchange effect.

[0061] It should be noted that when the refrigerant temperature in the first heat exchanger 200 is between the lowest and highest temperatures of the battery, the refrigerant in the first heat exchanger 200 can be used to raise the lowest temperature of the battery and lower the highest temperature of the battery, thereby reducing the difference between the lowest and highest temperatures of the battery and achieving the purpose of temperature equalization treatment of the battery.

[0062] Understandably, compared to existing technologies, this application controls the temperature of the refrigerant flowing from the exhaust port 110 of the compressor 100 to the first heat exchanger 200 when adjusting the battery temperature, so as to achieve uniform temperature treatment of the battery, thereby giving the battery better charging uniformity and extending the battery's service life.

[0063] In some embodiments, the battery is provided with a plurality of first temperature sensors, which are used to detect the temperature at different locations on the battery, thereby detecting the minimum and maximum temperatures of the battery. This can ensure the accuracy of battery temperature detection to a certain extent, and also facilitates the control of the temperature of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200, so that the temperature of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 can be maintained between the minimum and maximum temperatures of the battery, thereby achieving the purpose of equalizing the temperature of the battery.

[0064] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0065] In some embodiments, the thermal management system 1000 further includes a controller (not shown) electrically connected to the compressor 100. The controller is used to control the speed of the compressor 100 in a uniform temperature mode. This ensures that the temperature T1 of the refrigerant at the inlet of the first heat exchanger 200 satisfies: T2 < T1 < T3. In other words, after electrically connecting the controller to the compressor 100, the controller can control the speed of the compressor 100 when the thermal management system 1000 is operating in uniform temperature mode, thereby controlling the temperature of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200, which in turn controls the temperature of the refrigerant flowing to the inlet of the first heat exchanger 200, ensuring that the temperature T1 of the refrigerant flowing to the first heat exchanger 200 satisfies: T2 < T1 < T3.

[0066] The above can also be understood as follows: when the thermal management system 1000 operates in the uniform temperature mode, the controller controls the speed of the compressor 100 to control the temperature T1 of the refrigerant flowing from the exhaust port 110 of the compressor 100 to the first heat exchanger 200, and makes the temperature T1 of the refrigerant flowing to the first heat exchanger 200 greater than the battery's minimum temperature T2 and less than the battery's maximum temperature T3. In other words, when the thermal management system 1000 operates in the uniform temperature mode, it controls the temperature of the refrigerant flowing to the first heat exchanger 200 to be between the battery's minimum temperature and maximum temperature. In this way, when the refrigerant flows to the first heat exchanger 200 and exchanges heat with the battery, the refrigerant in the first heat exchanger 200 can be used to raise the battery's minimum temperature and lower the battery's maximum temperature, thereby reducing the difference between the battery's minimum temperature and maximum temperature, achieving the purpose of uniform temperature treatment of the battery, so that the battery has better charging uniformity and extends the battery's service life.

[0067] It can also be understood that this application mainly adjusts the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 by adjusting the speed of the compressor 100, so that T1 satisfies: T2 < T1 < T3.

[0068] Optionally, the controller is electrically connected to the first temperature sensor, and the controller controls the first temperature sensor so that the first temperature sensor can effectively detect the temperature of the battery. At the same time, it can also facilitate the acquisition of the detection value of the first temperature sensor. Based on the detection value, the speed of the compressor 100 is controlled so that the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 can effectively meet the condition: T2 < T1 < T3, which to a certain extent ensures the temperature uniformity of the thermal management system 1000.

[0069] In some embodiments, the first heat exchanger 200 is a heat exchange plate that contacts the battery to exchange heat with the battery, thereby regulating the battery temperature.

[0070] The heat exchange plate can be located on one side of the battery or on at least both sides of the battery to achieve heat exchange between the heat exchange plate and the battery.

[0071] In some embodiments, such as Figure 1 As shown, the thermal management system 1000 also includes a gas-liquid separator 930, which is located at the suction port 120 of the compressor 100. The gas-liquid separator 930 is mainly used to separate the refrigerant flowing to the compressor 100 into gas and liquid. This can, to a certain extent, prevent liquid refrigerant from slamming into the compressor 100, thereby ensuring that the compressor 100 can operate safely and normally, extending the service life of the thermal management system 1000 and improving the safety of the thermal management system 1000.

[0072] In some embodiments, combined with Figure 1 , Figure 2 and Figure 3 As shown, the temperature equalization mode has a first temperature equalization mode and a second temperature equalization mode. In the first temperature equalization mode, the first end of the first heat exchanger 200 is connected to the exhaust port 110, and the second end of the first heat exchanger 200 is connected to the intake port 120. In the second temperature equalization mode, the first end of the first heat exchanger 200 is connected to the intake port 120, and the second end of the first heat exchanger 200 is connected to the exhaust port 110. That is to say, when the first end of the first heat exchanger 200 is connected to the exhaust port 110 and the second end of the first heat exchanger 200 is connected to the intake port 120, or when the first end of the first heat exchanger 200 is connected to the intake port 120 and the second end of the first heat exchanger 200 is connected to the exhaust port 110, the battery can be temperature equalized to ensure the temperature equalization effect of the thermal management system 1000 and improve the flexibility of the thermal management system 1000. This results in a smaller temperature difference between the cells inside the battery. A smaller temperature difference can make the battery have better charging uniformity and help extend the battery's service life.

[0073] It should be noted that in the first uniform temperature mode, when the first end of the first heat exchanger 200 is connected to the exhaust port 110 and the second end of the first heat exchanger 200 is connected to the intake port 120, the first end of the first heat exchanger 200 forms the inlet of the first heat exchanger 200. At this time, the compressor 100 controls the temperature of the refrigerant at the first end of the first heat exchanger 200 according to the temperature of the battery. In the second uniform temperature mode, when the first end of the first heat exchanger 200 is connected to the intake port 120 and the second end of the first heat exchanger 200 is connected to the exhaust port 110, the first heat exchanger... The second end of the first heat exchanger 200 forms the inlet of the first heat exchanger 200. At this time, the compressor 100 controls the temperature of the refrigerant at the second end of the first heat exchanger 200 according to the temperature of the battery, so as to adjust the temperature of the refrigerant entering the first heat exchanger 200. This allows the refrigerant in the first heat exchanger 200 to effectively raise the minimum temperature of the battery and lower the maximum temperature of the battery, thereby reducing the difference between the minimum and maximum temperatures of the battery. This achieves the purpose of uniformly heating the battery, resulting in better charging uniformity and extending the battery's service life.

[0074] In some embodiments, such as Figure 1 As shown, the thermal management system 1000 includes an adjustable valve 500. The first end of the adjustable valve 500 is connected to the exhaust port 110 via a first electrically controlled valve 610 and to the intake port 120 via a second electrically controlled valve 620. The second end of the adjustable valve 500 is connected to the first end of the first heat exchanger 200. The first electrically controlled valve 610 and the second electrically controlled valve 620 are mainly used to control the opening and closing of the flow channels, thereby allowing the first end of the first heat exchanger 200 to selectively connect to either the exhaust port 110 or the intake port 120. This enables selective operation of a first temperature equalization mode and a second temperature equalization mode, reducing the difficulty of switching between the two modes and thus reducing the difficulty of temperature equalization for the battery.

[0075] In addition, the adjustable valve 500 can be used to throttle and reduce the pressure of the refrigerant flowing through it, so as to accurately adjust the output of the refrigerant.

[0076] In some embodiments, such as Figure 1 As shown, the thermal management system 1000 includes a throttling element 700. The first end of the throttling element 700 is connected to the second end of the first heat exchanger 200. The second end of the throttling element 700 is adapted to be connected to the first end of the heat exchanger 800 via a first unidirectional flow channel 910 and also adapted to be connected to the second end of the heat exchanger 800 via a second unidirectional flow channel 920. In other words, the second end of the throttling element 700 is also connected to the first end of the heat exchanger 800, thus allowing selective operation of a first temperature equalization mode and a second temperature equalization mode, reducing the difficulty of switching between the first and second temperature equalization modes, and consequently reducing the difficulty of temperature equalization for the battery.

[0077] The refrigerant flows in opposite directions in the first unidirectional flow channel 910 and the second unidirectional flow channel 920. The second end of the heat exchanger 800 is connected to the suction port 120 via the third electrically controlled valve 630, and the first end of the heat exchanger 800 is connected to the exhaust port 110 via the fourth electrically controlled valve 640. The third electrically controlled valve 630 and the fourth electrically controlled valve 640 are mainly used to control the opening and closing of the flow channels. The throttling element 700 is used to throttle and reduce the pressure of the refrigerant flowing through it, so as to accurately adjust the refrigerant output. The first unidirectional flow channel 910 and the second unidirectional flow channel 920 are mainly used to control the flow direction of the refrigerant within the flow channels.

[0078] With the above settings, the first and second uniform temperature modes can be selectively operated, reducing the difficulty of switching between the first and second uniform temperature modes. At the same time, the thermal management system 1000 can also have the functions of heating and cooling the battery, thereby enriching the functions of the thermal management system 1000 and ensuring that the battery temperature can be maintained within a suitable temperature range to guarantee the battery's working performance.

[0079] In some embodiments, when it is necessary to heat the battery using the thermal management system 1000, that is, when the temperature of the battery is increased using the thermal management system 1000, such as... Figure 2 As shown, the high-temperature and high-pressure refrigerant discharged from the exhaust port 110 of the compressor 100 flows sequentially through the first electronically controlled valve 610, the adjustable valve 500, and the first end of the first heat exchanger 200 into the first heat exchanger 200. The high-temperature and high-pressure refrigerant exchanges heat with the battery in the first heat exchanger 200 to raise the battery temperature, thereby achieving the purpose of heating the battery. After heat exchange, the refrigerant flows back to the compressor 100 sequentially through the second end of the first heat exchanger 200, the throttling element 700, the first one-way flow channel 910, the heat exchanger 800, and the third electronically controlled valve 630 to realize the circulation of the refrigerant. At the same time, when the refrigerant flows to the heat exchanger 800, the refrigerant can exchange heat with the coolant to recover the heat of the electronic control module 2000.

[0080] Accordingly, when it is necessary to use the thermal management system 1000 to cool the battery, that is, when the thermal management system 1000 is used to reduce the battery temperature, such as Figure 3As shown, the high-temperature and high-pressure refrigerant discharged from the exhaust port 110 of the compressor 100 flows sequentially through the fourth electronically controlled valve 640, the heat exchanger 800, the second one-way flow channel 920, the throttling element 700, and the second end of the first heat exchanger 200 into the first heat exchanger 200. When the refrigerant flows through the heat exchanger 800, the high-temperature and high-pressure refrigerant can exchange heat with the coolant to reduce the temperature of the refrigerant and transfer the heat of the refrigerant to the coolant, thus storing the heat. At the same time, the refrigerant after heat exchange exchanges heat with the battery in the first heat exchanger 200 to reduce the temperature of the battery, thereby achieving the purpose of cooling the battery. The refrigerant after heat exchange flows back to the compressor 100 sequentially through the first end of the first heat exchanger 200, the adjustable valve 500, and the second electronically controlled valve 620 to achieve the circulation of the refrigerant.

[0081] It should be noted that, Figure 3 The solid arrows shown indicate the direction of refrigerant flow, while the hollow arrows indicate the direction of coolant flow.

[0082] It should also be noted that, since an adjustable valve 500 and a throttling element 700 are provided, and the second end of the adjustable valve 500 is connected to the first end of the first heat exchanger 200, and the second end of the first heat exchanger 200 is connected to the first end of the throttling element 700, the thermal management system 1000 can also be controlled to enter the first mode by adjusting the opening of the adjustable valve 500 or the throttling element 700 located at the outlet of the first heat exchanger 200, so that the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 satisfies: T2 < T1 < T3.

[0083] In other words, the temperature T1 of the refrigerant flowing from the exhaust port 110 to the first heat exchanger 200 can also be adjusted by adjusting the opening of the adjustable valve 500 or the throttling element 700 located at the outlet of the first heat exchanger 200, so that T1 satisfies: T2 < T1 < T3.

[0084] Optionally, the throttling element 700 is an electronic expansion valve, which allows the throttling element 700 to throttle and reduce the pressure of the refrigerant flowing through it.

[0085] Optionally, the first solenoid valve 610, the second solenoid valve 620, the third solenoid valve 630, and the fourth solenoid valve 640 are normally open or normally closed valves, so as to facilitate the control of the flow channel by using the first solenoid valve 610, the second solenoid valve 620, the third solenoid valve 630, and the fourth solenoid valve 640, and reduce the control difficulty of the first solenoid valve 610, the second solenoid valve 620, the third solenoid valve 630, and the fourth solenoid valve 640.

[0086] In a specific example, when the thermal management system 1000 is used to raise the battery temperature, such as... Figure 2As shown, the first electronically controlled valve 610 is opened, the second electronically controlled valve 620 is closed, the third electronically controlled valve 630 is opened, and the fourth electronically controlled valve 640 is closed; when the thermal management system 1000 is used to reduce the battery temperature, such as Figure 3 As shown, the first solenoid valve 610 is closed, the second solenoid valve 620 is opened, the third solenoid valve 630 is closed, and the fourth solenoid valve 640 is opened.

[0087] In some embodiments, such as Figure 1 As shown, a first one-way valve 911 is provided on the first one-way flow channel 910, and a second one-way valve 921 is provided on the second one-way flow channel 920. The first one-way valve 911 and the second one-way valve 921 have different flow directions, so that the refrigerant flows in opposite directions in the first one-way flow channel 910 and the second one-way flow channel 920, ensuring that the thermal management system 1000 has the functions of heating and cooling the battery at the same time, so as to enrich the functions of the thermal management system 1000.

[0088] in, Figure 1 , Figure 2 and Figure 3 The dashed solid arrow shown indicates the flow direction of the first check valve 911 and the second check valve 921.

[0089] In some embodiments, such as Figure 2 As shown, when the first condition is met, the controller controls the first solenoid valve 610 to open, the second solenoid valve 620 to close, the third solenoid valve 630 to open, and the fourth solenoid valve 640 to close. The first condition includes: ambient temperature ≤ first set temperature H1, second set temperature T4 ≤ battery minimum temperature T2 ≤ third set temperature T5, and battery temperature difference ΔT > first set threshold. That is, when the ambient temperature is less than or equal to the first set temperature H1, the battery minimum temperature T2 is greater than or equal to the second set temperature T4 and less than or equal to the third set temperature T5, and the battery temperature difference ΔT is greater than the first set threshold, the controller controls the first solenoid valve 610 to open, the second solenoid valve 620 to close, the third solenoid valve 630 to open, and the fourth solenoid valve 640 to close. At this time, the thermal management system 1000 can enter the first temperature equalization mode.

[0090] It should be noted that when the ambient temperature is less than or equal to the first set temperature H1, the battery minimum temperature T2 is greater than or equal to the second set temperature T4 and less than or equal to the third set temperature T5, and the battery temperature difference ΔT is greater than the first set threshold, it indicates that the ambient temperature is low, the battery minimum temperature T2 is low, and the battery temperature difference is large. Controlling the electronically controlled valve in the above manner can control the refrigerant flow direction as follows: compressor 100 → first electronically controlled valve 610 → adjustable valve 500 → first heat exchanger 200 → throttling element 700 → first one-way flow channel 910 → heat exchanger 800 → third electronically controlled valve 630 → compressor 100, and activate the circulating pump 310 to control the coolant flow (e.g., Figure 2As shown in the figure, the temperature T1 of the refrigerant flowing to the first heat exchanger 200 is greater than the lowest temperature T2 of the battery and less than the highest temperature T3 of the battery, so as to use the temperature of the refrigerant itself and the temperature of the coolant to raise the lowest temperature T2 of the battery, thereby achieving the purpose of heating the lowest temperature of the battery and realizing the uniform temperature effect of the battery.

[0091] In some embodiments, when the first condition is met, the temperature T1 of the refrigerant flowing to the first heat exchanger 200 is controlled to be close to the highest temperature T3 of the battery. This allows the heat from the electronic control module 2000 and the heat from the highest temperature T3 of the battery to be transferred to the lowest temperature T2 of the battery through refrigerant circulation. This adjusts the lowest temperature T2 and the highest temperature T3 of the battery to be close to the highest temperature T3 of the battery, thereby achieving the heating and temperature equalization effect of the battery.

[0092] In some embodiments, such as Figure 3 As shown, when the second condition is met, the controller controls the first solenoid valve 610 to close, the second solenoid valve 620 to open, the third solenoid valve 630 to close, and the fourth solenoid valve 640 to open, and the thermal management system 1000 enters the temperature equalization mode. The second condition includes: ambient temperature ≤ first set temperature H1, third set temperature T5 < battery minimum temperature T2 ≤ fourth set temperature T6, and battery temperature difference ΔT > first set threshold. That is, when the ambient temperature is less than or equal to the first set temperature H1, the battery minimum temperature T2 is greater than the third set temperature T5 and less than or equal to the fourth set temperature T6, and the battery temperature difference ΔT is greater than the first set threshold, the controller controls the first solenoid valve 610 to close, the second solenoid valve 620 to open, the third solenoid valve 630 to close, and the fourth solenoid valve 640 to open, and the thermal management system 1000 enters the second temperature equalization mode.

[0093] It should be noted that when the ambient temperature is less than or equal to the first set temperature H1, the battery minimum temperature T2 is greater than the third set temperature T5 and less than or equal to the fourth set temperature T6, and the battery temperature difference ΔT is greater than the first set threshold, it indicates that the ambient temperature is low, the battery minimum temperature T2 is high, and the battery temperature difference is large. By controlling the electronically controlled valve in the above manner, the flow direction of the refrigerant can be controlled as follows: compressor 100 → fourth electronically controlled valve 640 → heat exchanger 800 → second unidirectional flow channel 920 → throttling element 700 → first heat exchanger 200 → adjustable valve 500 → second electronically controlled valve 620 → compressor 100. The circulating pump 310 is also activated to control the coolant flow (e.g., Figure 3As shown in the diagram, this allows the refrigerant to exchange heat with the coolant before exchanging heat with the battery, thereby reducing the refrigerant temperature. At the same time, it makes it easier to control the temperature T1 of the refrigerant flowing to the first heat exchanger 200 to be close to the lowest temperature T2 of the battery. This allows the temperature of the coolant and the heat from the highest temperature T3 of the battery to be transferred to the lowest temperature T2 of the battery through refrigerant circulation, and the lowest temperature T2 and the highest temperature T3 of the battery to be adjusted to be close to the lowest temperature T2 of the battery, thereby achieving the cooling and temperature equalization effect of the battery.

[0094] At the same time, by opening the fourth electronic control valve 640, excess heat from the refrigerant can be transferred to the coolant for storage. Because water has a large specific heat capacity, it can raise the water temperature to store some heat. When the battery is charged and the vehicle is in motion, the vehicle heating strategy can be used to slowly transfer some of the heat from the coolant back to the battery to avoid actively dissipating heat into the environment in low-temperature conditions.

[0095] In summary, the thermal management system 1000 of this application has two temperature equalization modes. When the ambient temperature is less than or equal to the first set temperature H1, the battery minimum temperature T2 is greater than or equal to the second set temperature T4 and less than or equal to the third set temperature T5, and the battery temperature difference ΔT is greater than the first set threshold, the first electronically controlled valve 610 is opened, the second electronically controlled valve 620 is closed, the third electronically controlled valve 630 is opened, and the fourth electronically controlled valve 640 is closed, and the thermal management system 1000 enters the first temperature equalization mode (e.g., ...). Figure 2 As shown), at this time, the thermal management system 1000 can be used to perform temperature equalization on the battery, and raise the battery's lowest temperature T2 to near the battery's highest temperature T3, thereby achieving temperature equalization and heating when the battery temperature is low; when the ambient temperature is less than or equal to the first set temperature H1, the battery's lowest temperature T2 is greater than the third set temperature T5 and less than or equal to the fourth set temperature T6, and the battery temperature difference ΔT is greater than the first set threshold, the first electronic control valve 610 is closed, the second electronic control valve 620 is opened, the third electronic control valve 630 is closed and the fourth electronic control valve 640 is opened, and the thermal management system 1000 enters the second temperature equalization mode (e.g., Figure 3 As shown in the figure, the thermal management system 1000 can be used to equalize the temperature of the battery and reduce the highest temperature T3 of the battery to near the lowest temperature T2 of the battery, thereby achieving equalization and cooling when the battery temperature is high, and transferring the battery heat to the coolant to achieve the purpose of heat storage.

[0096] In some embodiments, the controller is further configured to: control the thermal management system 1000 to exit the temperature equalization mode when a third condition is met, the third condition including battery temperature difference ΔT ≤ a second set threshold, battery temperature difference ΔT = T3 - T2. This means that during the operation of the thermal management system 1000 in temperature equalization mode, when the difference between the lowest and highest battery temperatures is detected to be less than or equal to the second set threshold, the thermal management system 1000 exits the temperature equalization mode to improve the flexibility of the thermal management system 1000 and avoid energy waste caused by continuously running the thermal management system 1000.

[0097] When the difference between the battery's lowest temperature and its highest temperature is less than or equal to the second set threshold, it indicates that the battery's temperature difference is small. In this case, it does not affect the charging uniformity, so the temperature equalization process for the battery is stopped.

[0098] In some embodiments, the controller can be used to control the speed of the compressor 100 and adjust the temperature of the refrigerant discharged from the compressor 100, so as to control the thermal management system 1000 to exit the uniform temperature mode.

[0099] In some embodiments, the thermal management system 1000 is controlled to operate in a uniform temperature mode when a fourth condition is met. The fourth condition includes a battery temperature difference ΔT > a first set threshold, where ΔT = T3 - T2. This means that during battery operation, when the difference between the battery's lowest and highest temperatures is detected to be greater than the first set threshold, the thermal management system 1000 operates in uniform temperature mode to control the temperature of the refrigerant flowing to the first heat exchanger 200, ensuring that the temperature of the refrigerant flowing to the first heat exchanger 200 is between the battery's lowest and highest temperatures. This achieves uniform temperature treatment of the battery, resulting in better charging uniformity and extending battery life.

[0100] It should be noted that when the difference between the battery's lowest temperature and its highest temperature exceeds the first set threshold, it indicates that the battery's temperature difference is large. This will affect the uniformity of charging and shorten the battery's lifespan. Therefore, the thermal management system 1000 is controlled to enter the temperature equalization mode to perform temperature equalization treatment on the battery.

[0101] In some embodiments, when the thermal management system 1000 is running in the temperature equalization mode, the minimum temperature and the maximum temperature of the battery are detected in real time. When the difference between the minimum temperature and the maximum temperature of the battery is less than or equal to a second set threshold, the thermal management system 1000 exits the temperature equalization mode. This not only keeps the battery temperature difference within a suitable range, but also improves the flexibility of the thermal management system 1000 and avoids energy waste.

[0102] In some embodiments, the first set threshold is greater than the second set threshold. This facilitates controlling the thermal management system 1000 to operate in a temperature equalization mode when the difference between the battery's lowest and highest temperatures is large, and facilitates controlling the thermal management system 1000 to exit the temperature equalization mode when the difference between the battery's lowest and highest temperatures is small.

[0103] In some embodiments, such as Figure 1 As shown, the thermal management system 1000 also includes a coolant subsystem 300 and a second heat exchange channel 400. The coolant subsystem 300 includes a first heat exchange channel 320, on which a circulating pump 310 and a second heat exchange element (not shown in the figure) are connected. The second heat exchange element can exchange heat with the electronic control module 2000. The second heat exchange channel 400 is connected between the first heat exchange element 200 and the compressor 100, and exchanges heat with the first heat exchange channel 320. The electronic control module 2000 is mainly used to control the charging and discharging of the battery. During the charging and discharging process, the electronic control module 2000 generates heat. By configuring the coolant subsystem 300 to include a first heat exchange channel 320, and a circulating pump 310 and a second heat exchange element connected to the first heat exchange channel 320, the circulating pump 310 can drive the coolant in the coolant subsystem 300 to circulate between the second heat exchange element and the first heat exchange channel 320. When the coolant flows into the second heat exchange element, the coolant in the second heat exchange element can exchange heat with the electronic control module 2000 to regulate the temperature of the electronic control module 2000. At the same time, the temperature generated by the electronic control module 2000 itself can also increase the temperature of the coolant.

[0104] Meanwhile, by connecting the second heat exchange channel 400 between the first heat exchange element 200 and the compressor 100, the refrigerant can be delivered to the second heat exchange channel 400, and the refrigerant can circulate between the compressor 100, the first heat exchange element 200 and the second heat exchange channel 400. Since the second heat exchange channel 400 also exchanges heat with the first heat exchange channel 320, when the refrigerant flows to the second heat exchange channel 400, the refrigerant can exchange heat with the coolant in the first heat exchange channel 320 to absorb the temperature of the coolant, thereby realizing the use of the coolant to heat the battery, ensuring the heating efficiency and heating quality of the battery.

[0105] Furthermore, by setting the second heat exchange channel 400 to exchange heat with the first heat exchange channel 320, this application can make full use of the waste heat generated by the normal operation of the electronic control module 2000. In this way, when heating the battery, the energy efficiency of the thermal management system 1000 can be increased, that is, the heating capacity of the thermal management system 1000 can be increased, thus avoiding energy waste.

[0106] In some embodiments, such as Figure 1As shown, the thermal management system 1000 also includes a heat exchanger 800. The second heat exchange channel 400 and the first heat exchange channel 320 pass through the heat exchanger 800 at the same time, so that the second heat exchange channel 400 and the first heat exchange channel 320 can exchange heat, thereby utilizing the waste heat generated by the normal operation of the electronic control module 2000, increasing the energy efficiency of the thermal management system 1000, and avoiding energy waste.

[0107] It should also be noted that by setting a second heat exchanger to exchange heat with the electronic control module 2000, this application can also adjust the temperature of the electronic control module 2000, so that the temperature of the electronic control module 2000 can be maintained within a suitable temperature range, thereby ensuring the working performance of the electronic control module 2000 and extending the service life of the electronic control module 2000.

[0108] In some embodiments, the second heat exchanger is a heat exchange plate to facilitate heat exchange between the second heat exchanger and the electronic control module 2000.

[0109] Optionally, the coolant subsystem 300 is filled with coolant, which circulates between the circulation pump 310, the second heat exchanger, and the first heat exchange channel 320. When the temperature of the coolant flowing through the second heat exchanger is low, the second heat exchanger can be used to reduce the temperature of the electronic control module 2000, thereby achieving the purpose of heat dissipation for the electronic control module 2000. At the same time, the temperature of the coolant increases, and the coolant exchanges heat with the refrigerant to achieve the purpose of heating the battery.

[0110] In some embodiments, such as Figure 1 As shown, the coolant subsystem 300 also includes a reservoir 330 filled with coolant to facilitate the control of coolant circulation between the circulating pump 310, the second heat exchanger and the first heat exchange channel 320, thereby ensuring the working performance of the coolant subsystem 300.

[0111] Optionally, the coolant can be an environmentally friendly liquid with a high specific heat, such as water or ethylene glycol, to ensure the heat exchange effect of the coolant subsystem 300.

[0112] In some embodiments, such as Figure 1 As shown, the coolant subsystem 300 includes a radiator 350 and an electric fan 360. The radiator 350 is connected in series within the coolant subsystem 300, and the electric fan 360 is positioned opposite the radiator 350. The operation of the electric fan 360 ensures that the radiator 350 can dissipate heat from the coolant flowing through it, thereby reducing the temperature of the coolant and thus dissipating heat from the electronic control module 2000.

[0113] In some embodiments, such as Figure 2As shown, the first end of the first heat exchanger 200 is connected to the exhaust port 110 of the compressor 100, and the second end of the first heat exchanger 200 is connected to the suction port 120 through the second heat exchange channel 400. In the first heating mode, the controller is used to control the circulation pump 310 to start so that the first heat exchange channel 320 and the second heat exchange channel 400 can exchange heat. This means that the thermal management system 1000 has a first heating mode. When the thermal management system 1000 runs the first heating mode, it controls the exhaust port 110 of the compressor 100 to connect with the first end of the first heat exchanger 200, and the second end of the first heat exchanger 200 is connected to the suction port 120 through the second heat exchange channel 400. At this time, the refrigerant discharged by the compressor 100 can directly enter the first heat exchanger 200 to exchange heat with the battery, so as to increase the temperature of the battery and achieve the purpose of heating the battery. After the refrigerant in the first heat exchanger 200 exchanges heat with the battery, it can flow back to the compressor 100 through the second heat exchange channel 400 to realize the circulation of the refrigerant.

[0114] Meanwhile, with the circulation pump 310 turned on, the coolant in the coolant subsystem 300 can circulate between the circulation pump 310, the second heat exchanger, and the first heat exchange channel 320. When the coolant flows through the second heat exchanger, it exchanges heat with the electronic control module 2000 to increase the temperature of the coolant. When the coolant flows through the first heat exchange channel 320, the coolant with a higher temperature can exchange heat with the refrigerant in the second heat exchange channel 400, thereby increasing the temperature of the refrigerant and increasing the heating capacity of the thermal management system 1000.

[0115] In other words, when the thermal management system 1000 is running in the first heating mode, it uses the heat generated by the refrigerant and the electronic control module 2000 to heat the battery simultaneously. This not only raises the battery temperature but also recovers the heat generated by the electronic control module 2000 during operation, avoiding heat waste and ensuring the heating performance of the thermal management system 1000.

[0116] In some embodiments, when the minimum temperature T2 of the battery is lower than the first heating temperature, the first heating mode is operated so as to use the refrigerant and coolant to heat the battery, thereby maintaining the minimum temperature of the battery within a suitable temperature range and ensuring the battery's working performance to a certain extent.

[0117] In a specific example, when the thermal management system 1000 operates in the first heating mode, it first controls the compressor 100 and the circulation pump 310 to start. Because the electronic control module 2000 generates heat during the battery charging and discharging process, when the circulation pump 310 is started (e.g....), Figure 2As shown), the circulating pump 310 controls the flow of coolant in the coolant subsystem 300 and passes through the second heat exchanger. At this time, the coolant exchanges heat with the electronic control module 2000 through the second heat exchanger, thereby increasing the temperature of the coolant in the coolant subsystem 300. Simultaneously, when the compressor 100 is turned on (e.g., ...), Figure 2 As shown, the refrigerant in the compressor 100 can flow through the exhaust port 110 to the first end of the first heat exchanger 200, and then flow through the first end of the first heat exchanger 200 into the first heat exchanger 200. At this time, the refrigerant can exchange heat with the battery through the first heat exchanger 200 to raise the battery temperature. After the refrigerant exchanges heat with the battery, it flows out through the second end of the first heat exchanger 200 to the second heat exchange channel 400, and then flows back to the compressor 100 through the second heat exchange channel 400 to realize the circulation of the compressor 100.

[0118] When the refrigerant flows through the second heat exchange channel 400, it can exchange heat with the coolant in the first heat exchange channel 320, which facilitates the transfer of heat from the coolant to the refrigerant and increases the refrigerant temperature. This improves the heat exchange effect of the refrigerant when it circulates to the first heat exchanger 200 to heat the battery again.

[0119] It should be noted that when the thermal management system 1000 is running in the first heating mode, the temperature of the coolant is low in the early stage, so the speed of the compressor 100 can be controlled first to increase the temperature of the refrigerant and ensure the heating capacity of the thermal management system 1000.

[0120] It should also be noted that, Figure 2 The solid arrows shown indicate the direction of refrigerant flow, while the hollow arrows indicate the direction of coolant flow.

[0121] In some embodiments, in the internal circulation mode, the controller controls the thermal management system 1000 to operate in a temperature equalization mode and the circulation pump 310 to be turned on. The internal circulation mode is the mode when the battery's minimum temperature T2 reaches the fifth set temperature. This can also be understood as the thermal management system 1000 having an internal circulation mode. When the battery's minimum temperature T2 reaches the fifth set temperature, the thermal management system 1000 operates in internal circulation mode. In internal circulation mode, the thermal management system 1000 operates in temperature equalization mode and the circulation pump 310 is turned on. This allows for the recovery of heat from the electronic control module 2000. Simultaneously, because the thermal management system 1000 operates in temperature equalization mode, the heat from the electronic control module 2000 can be used to equalize the battery temperature, thereby reducing the battery temperature difference, resulting in better charging uniformity and extending battery life. It also lowers the coolant temperature, preventing the coolant from actively dissipating heat into the environment and reducing energy waste.

[0122] In some embodiments, when the battery's minimum temperature T2 reaches a fifth set temperature, the thermal management system 1000 switches from the first heating mode to the internal circulation mode. This can be understood as follows: when the thermal management system 1000 operates in the first heating mode to heat the battery's minimum temperature T2 to the fifth set temperature, the thermal management system 1000 switches from the first heating mode to the internal circulation mode. In the internal circulation mode, the circulation pump 310 is activated. Because the temperature of the electronic control module 2000 increases when the battery is in the first heating mode, the temperature of the coolant in the coolant subsystem 300 also rises. Furthermore, the coolant temperature remains high even after the battery is heated. Activating the circulation pump 310 at this time allows for the recovery of heat from the electronic control module 2000. Simultaneously, because the thermal management system 1000 operates in the temperature equalization mode, it can utilize the heat from the electronic control module 2000 to equalize the battery temperature, thereby reducing the battery temperature difference, resulting in better charging uniformity and extending battery life. It also lowers the coolant temperature, preventing the coolant from actively dissipating heat into the environment and reducing energy waste.

[0123] It should be noted that when the thermal management system 1000 operates in the first heating mode to heat the battery, the charging current of the battery increases after the battery temperature rises, which leads to an increase in the heat generated by the battery cells. By operating the internal circulation mode to achieve temperature uniformity, the battery temperature rise can be reduced, thereby giving the battery better charging uniformity.

[0124] It should also be noted that when running the internal circulation mode, the minimum battery temperature can still be increased, thereby accelerating the battery charging rate and reducing the battery charging time.

[0125] In other words, when the battery is being charged at low temperatures, the thermal management system 1000 of this application first controls the battery to heat up. After the battery is heated, it then performs a temperature equalization process on the battery. This ensures that the battery temperature reaches a suitable temperature while reducing the temperature difference of the battery, thereby ensuring the battery's performance and extending its service life.

[0126] In some embodiments, the controller is further configured to: control the thermal management system 1000 to exit the internal circulation mode when a fifth condition is met, the fifth condition including that the coolant temperature of the coolant subsystem 300 is lower than a sixth set temperature. That is, when the coolant temperature of the coolant subsystem 300 is detected to be lower than the sixth set temperature, the thermal management system 1000 exits the internal circulation mode.

[0127] It should be noted that when the coolant temperature of the coolant subsystem 300 is lower than the sixth set temperature, it means that the coolant temperature of the coolant subsystem 300 is low. At this time, the coolant cannot effectively raise the minimum temperature of the battery. Therefore, the internal circulation mode is exited to avoid energy waste caused by running the thermal management system 1000 for a long time.

[0128] In the description of this invention, features defined with "first", "second", "third", "fourth", "fifth" and "sixth" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or importance.

[0129] In some embodiments, such as Figure 1 As shown, the coolant subsystem 300 includes a second temperature sensor 340, which is used to detect the temperature of the coolant in the coolant subsystem 300, thereby facilitating the determination of whether the thermal management system 1000 has exited the internal circulation mode and reducing the control difficulty of the thermal management system 1000.

[0130] In specific examples, such as Figure 2 As shown, when the battery's minimum temperature T2 is detected to be lower than the first heating temperature, the first heating mode is activated. At this time, the circulating pump 310 controls the coolant in the coolant subsystem 300 to circulate between the circulating pump 310, the second heat exchanger, and the first heat exchange channel 320. When the coolant flows through the second heat exchanger, it exchanges heat with the electronic control module 2000 to increase the coolant temperature. Simultaneously, the compressor 100 is activated to control the refrigerant to circulate between the compressor 100, the first heat exchanger 200, and the second heat exchange channel 400. When the refrigerant flows through the first heat exchanger 200, it exchanges heat with the battery to increase the battery temperature, achieving a battery heating mode. When the refrigerant flows through the second heat exchange channel 400, it exchanges heat with the coolant in the first heat exchange channel 320 to achieve the recovery of the electronic control module. The heat generated by the 2000 refrigerant increases the temperature of the refrigerant, thus improving the heat exchange between the refrigerant and the battery. When the battery's minimum temperature T2 reaches the fifth set temperature, the thermal management system 1000 switches from the first heating mode to the internal circulation mode. In the internal circulation mode, the flow paths of the refrigerant and coolant remain unchanged, but the temperature T1 of the refrigerant flowing from the exhaust port 110 of the compressor 100 to the first heat exchanger 200 is controlled. This ensures that the temperature T1 of the refrigerant flowing to the first heat exchanger 200 is greater than the battery's minimum temperature T2 and less than the battery's maximum temperature T3. This ensures that the waste heat utilization of the electronic control module 2000 does not cause the battery's maximum temperature T3 to be too high, while also achieving the purpose of equalizing the battery's temperature. When the coolant temperature of the coolant subsystem 300 is lower than the sixth set temperature, the thermal management system 1000 exits the internal circulation mode, and the heating ends.

[0131] In some embodiments, the controller is further configured to: control the thermal management system 1000 to enter a self-heating mode, in which the battery is charged and discharged to heat up. This allows the battery to heat up rapidly, thereby regulating the battery temperature and maintaining it within a suitable temperature range, thus ensuring the battery's performance to a certain extent.

[0132] In some embodiments, when the thermal management system 1000 is running in self-heating mode, the battery can be controlled by the electronic control module 2000 to perform high-frequency charging and discharging, so that the battery cells inside the battery can be heated rapidly by the heat generated by the internal resistance, thereby enabling the battery to heat up rapidly.

[0133] In some embodiments, when the lowest temperature T2 of the battery is lower than the second heating temperature, a self-heating mode is activated to enable the battery to heat up rapidly, thereby ensuring the battery's performance.

[0134] Optionally, the second heating temperature is lower than the first heating temperature. That is, when the battery's minimum temperature T2 is detected to be low but not lower than the second heating temperature, the thermal management system 1000 operates the first heating mode to heat the battery using a combination of refrigerant and coolant, thereby maintaining the battery's minimum temperature within a suitable range; when the battery's minimum temperature T2 is detected to be low and lower than the second heating temperature, the thermal management system 1000 operates the self-heating mode to rapidly raise the battery temperature and avoid affecting the battery's performance.

[0135] It should be noted that the electronic control module 2000 generates some residual heat when controlling the battery to perform high-frequency charging and discharging. Therefore, when the self-heating mode is run to raise the battery temperature and the minimum battery temperature T2 is raised to the first heating temperature, the thermal management system 1000 can be controlled to run the first heating mode so as to use the refrigerant and coolant to heat the battery, thereby maintaining the minimum battery temperature within a suitable temperature range.

[0136] In a specific example, when the battery's minimum temperature T2 is detected to be lower than the second heating temperature, it indicates that the battery has a significant heating requirement. At this time, the thermal management system 1000 first operates in self-heating mode to enable the electronic control module 2000 to control the battery to perform high-frequency charging and discharging, allowing the battery cells to rapidly heat up due to the heat generated by their internal resistance. When the battery's minimum temperature T2 is heated to the first heating temperature in self-heating mode, the thermal management system 1000 switches from self-heating mode to the first heating mode. In the first heating mode, the battery temperature can be further increased to achieve the desired heating effect. When the battery's minimum temperature T2 reaches the fifth set temperature in the first heating mode, the thermal management system 1000 switches from the first heating mode to internal circulation mode to recover the waste heat from the electronic control module 2000 and simultaneously perform temperature equalization on the battery. When the coolant temperature of the coolant subsystem 300 in internal circulation mode is lower than the sixth set temperature, the thermal management system 1000 exits the internal circulation mode, and the heating ends.

[0137] The operation process of the first heating mode and the internal circulation mode can be found above, and will not be repeated here.

[0138] In some embodiments, the controller is electrically connected to the first solenoid valve 610, the second solenoid valve 620, the third solenoid valve 630, the fourth solenoid valve 640, the adjustable valve 500, the throttling element 700, the first check valve 911, and the second check valve 921, respectively, to control the on / off state and opening degree of the above-mentioned structural components, thereby enabling the thermal management system 1000 to switch between multiple modes, improving the user experience, and ensuring the working performance of the battery.

[0139] It should be noted that the first set threshold, second set threshold, first heating temperature, first set temperature, second set temperature, second heating temperature, third set temperature, fourth set temperature, fifth set temperature, and sixth set temperature mentioned above are not specifically limited in this application. Those skilled in the art can make reasonable selections based on the battery model, vehicle model, and the environment in which the vehicle is located.

[0140] In summary, the thermal management system 1000 of this application, by controlling the speed of the compressor 100, the opening degree of the adjustable valve 500 and the opening degree of the throttling element 700, and in conjunction with the coolant subsystem 300, can achieve cooling, heating and temperature equalization of the battery under low-temperature charging. It can also select different circulation loops according to different ambient temperatures to achieve precise control of the refrigerant temperature, ensuring the working performance of the battery. At the same time, it can also recover the waste heat of the electronic control module 2000 for utilization, reducing energy waste.

[0141] The vehicle according to an embodiment of the present invention is described below.

[0142] A vehicle according to an embodiment of the present invention includes a thermal management system 1000.

[0143] Among them, the thermal management system 1000 is the aforementioned thermal management system 1000, and the specific structure of the thermal management system 1000 will not be described in detail here.

[0144] As can be seen from the above structure, the vehicle of the present invention, by adopting the aforementioned thermal management system 1000, can regulate the temperature of the battery located in the vehicle and reduce the temperature difference of the battery, so as to ensure the working performance of the vehicle to a certain extent, extend the service life of the vehicle, and reduce the operating cost of the vehicle.

[0145] It should be noted that the batteries mentioned above are mainly used to power the vehicle so that it can operate normally.

[0146] In some examples, the battery can serve as the operating power source for the vehicle, which may also include a controller and a motor. The controller controls the battery to power the motor, for example, to meet the power requirements for starting, navigating, and driving the vehicle.

[0147] In other examples, batteries can serve not only as the operating power source for a vehicle, but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0148] When using batteries as the driving power source for a vehicle, the vehicle can be either a pure electric vehicle or a hybrid vehicle.

[0149] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0150] The specific structure and function of the thermal management system 1000 and other components of the vehicle having it, such as the battery and the electronic control module 2000, according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0151] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0152] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A thermal management system, characterized in that, include: The compressor has an exhaust port and an intake port; The first heat exchanger is adapted to exchange heat with the battery, and its two ends are respectively connected to the exhaust port and the intake port to allow the refrigerant to flow. The controller is electrically connected to the compressor; The controller is configured to execute the following control flow: When the lowest temperature T2 of the battery is detected to be lower than the second heating temperature, the thermal management system is controlled to enter the self-heating mode, in which the battery is charged and discharged to heat it. When the lowest temperature T2 of the battery in the self-heating mode reaches the first heating temperature, the thermal management system is controlled to switch to the first heating mode. In the first heating mode, the compressor is controlled to run so that the refrigerant flows through the first heat exchanger to heat the battery. The second heating temperature is lower than the first heating temperature. When the lowest temperature T2 of the battery in the first heating mode reaches the fifth set temperature, the thermal management system is controlled to switch to the internal circulation mode. In the internal circulation mode, the controller controls the thermal management system to run in the uniform temperature mode. The compressor is configured to: in the uniform temperature mode, control the temperature T1 of the refrigerant at the inlet of the first heat exchanger to satisfy T2 < T1 < T3, where T2 is the lowest temperature of the battery and T3 is the highest temperature of the battery. Specifically, under the condition of satisfying the first condition, the temperature T1 of the refrigerant flowing to the first heat exchanger is controlled to be close to the highest temperature T3 of the battery. The first condition includes: ambient temperature ≤ first set temperature H1, second set temperature T4 ≤ lowest battery temperature T2 ≤ third set temperature T5, and battery temperature difference ΔT > first set threshold. Under the condition of satisfying the second condition, the temperature T1 of the refrigerant flowing to the first heat exchanger is controlled to be close to the lowest temperature T2 of the battery. The second condition includes: ambient temperature ≤ first set temperature H1, third set temperature T5 < lowest battery temperature T2 ≤ fourth set temperature T6, and battery temperature difference ΔT > first set threshold.

2. The thermal management system according to claim 1, characterized in that, The controller is used to control the speed of the compressor in the uniform temperature mode.

3. The thermal management system according to claim 2, characterized in that, The temperature equalization mode includes a first temperature equalization mode and a second temperature equalization mode. In the first temperature equalization mode, the first end of the first heat exchanger is connected to the exhaust port, and the second end of the first heat exchanger is connected to the intake port. In the second uniform temperature mode, the first end of the first heat exchanger is connected to the air intake port, and the second end of the first heat exchanger is connected to the exhaust port.

4. The thermal management system according to claim 3, characterized in that, The thermal management system includes an adjustable valve. The first end of the adjustable valve is connected to the exhaust port through a first electrically controlled valve and to the intake port through a second electrically controlled valve. The second end of the adjustable valve is connected to the first end of the first heat exchanger.

5. The thermal management system according to claim 4, characterized in that, The thermal management system includes a throttling element, a first end of which is connected to a second end of the first heat exchanger, and the second end of which is adapted to be connected to the first end of the heat exchanger through a first one-way flow channel and to be connected to the second end of the heat exchanger through a second one-way flow channel. The refrigerant flows in opposite directions in the first and second unidirectional flow channels. The second end of the heat exchanger is connected to the intake port via a third electrically controlled valve, and the first end of the heat exchanger is connected to the exhaust port via a fourth electrically controlled valve.

6. The thermal management system according to claim 5, characterized in that, Under the condition that the first condition is met, the controller is used to control the first solenoid valve to open, the second solenoid valve to close, the third solenoid valve to open, and the fourth solenoid valve to close.

7. The thermal management system according to claim 5, characterized in that, When the second condition is met, the controller is used to control the first solenoid valve to close, the second solenoid valve to open, the third solenoid valve to close, and the fourth solenoid valve to open.

8. The thermal management system according to claim 2, characterized in that, The controller is also used for: Under the condition that the third condition is met, the thermal management system is controlled to exit the temperature equalization mode. The third condition includes the battery temperature difference ΔT ≤ the second set threshold, where the battery temperature difference ΔT = T3 - T2.

9. The thermal management system according to claim 2, characterized in that, The controller is also used for: Under the condition that the fourth condition is met, the thermal management system is controlled to the temperature equalization mode. The fourth condition includes the battery temperature difference ΔT > the first set threshold, where the battery temperature difference ΔT = T3 - T2.

10. The thermal management system according to claim 2, characterized in that, Also includes: A coolant subsystem, the coolant subsystem including a first heat exchange channel, a circulating pump and a second heat exchange component connected to the first heat exchange channel, the second heat exchange component being able to exchange heat with the electronic control module; The second heat exchange channel is connected between the first heat exchange element and the compressor, and is used to exchange heat with the first heat exchange channel.

11. The thermal management system according to claim 10, characterized in that, The first end of the first heat exchanger is connected to the exhaust port of the compressor, and the second end of the first heat exchanger is connected to the intake port through the second heat exchange channel; In the first heating mode, the controller is used to control the circulation pump to start so that the first heat exchange channel and the second heat exchange channel can exchange heat.

12. The thermal management system according to claim 11, characterized in that, In internal circulation mode, the controller is used to control the circulation pump to start.

13. The thermal management system according to claim 12, characterized in that, The controller is also configured to: control the thermal management system to exit the internal circulation mode when a fifth condition is met, the fifth condition including the coolant temperature of the coolant subsystem being lower than a sixth set temperature.

14. A vehicle, characterized in that, Includes the thermal management system according to any one of claims 1-13.

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