Battery thermal management system and new-energy vehicle

Abstract

A battery thermal management system (1) and a new-energy vehicle (2). A battery chiller (400), a first water pump (110) and a battery heat exchange module (300) are communicated by means of a control valve group (900) to form a first circulation loop (101); a compressor (500), a water-cooled condenser (600), a throttle valve (700) and the battery chiller (400) are sequentially communicated to form a second circulation loop (102); a low-temperature radiator (810), a second water pump (120) and the water-cooled condenser (600) are communicated by means of the control valve group (900) to form a third circulation loop (103); and the low-temperature radiator (810) can be communicated with the first water pump (110) and the battery heat exchange module (300) in sequence by means of the control valve group (900) to form a fourth circulation loop (104).

Description

Battery thermal management system and new energy vehicles

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202321670610.3, filed on June 28, 2023, entitled “Battery Thermal Management System and New Energy Vehicle,” the entire text of which is hereby incorporated by reference. Technical Field

[0003] The present application relates to the technical field of battery thermal management, and in particular to a battery thermal management system and a new energy vehicle. Background Art

[0004] A battery thermal management system (BTMS) is a system designed to control battery temperature. With the rapid development of electric and new energy vehicles, batteries have become an indispensable component. However, batteries are prone to overheating and overcooling during use, which can affect battery performance, lifespan, and even safety. The BTMS's role is to regulate battery temperature in a timely manner, ensuring it remains within the optimal operating temperature range. Therefore, the BTMS plays a crucial role in the safety, stability, and lifespan of new energy vehicles.

[0005] Battery thermal management systems are generally classified into three cooling methods: air cooling, liquid cooling, and direct cooling. Liquid cooling is currently the most commonly used method. There are two main liquid cooling battery thermal management system solutions.

[0006] In the first solution, when the battery needs to be cooled, the air conditioning system's refrigerant is generally used to cool the coolant passing through the battery's chiller, which is then used to cool the battery. When the battery needs to be heated, the coolant is first heated using a PTC (Positive Temperature Coefficient) heater, which is then used to heat the battery. The first solution has the following disadvantages: in low ambient temperature conditions, the air conditioning system's compressor speed is low and the compressor starts and stops frequently, making it susceptible to damage. Furthermore, directly using the air conditioning system for cooling in low ambient temperature conditions results in high energy consumption.

[0007] In the second solution, the battery can be actively cooled when the ambient temperature is high, and passively cooled when the ambient temperature is low. Furthermore, PTC heating is also used for battery heating. Specifically, in low ambient temperature conditions, the coolant is directly cooled by a low-temperature radiator, which then cools the battery. This second solution overcomes the drawbacks of the first solution, such as the compressor's fragility and high energy consumption. However, it also has its own drawbacks, including: ① The co-location of the low-temperature radiator and air-cooled condenser reduces the air volume passing through the condenser, thereby reducing the cooling performance of the BTMS. ② To ensure the cooling performance of the BTMS, the power and specifications of the electronic fan must be increased, which increases the BTMS's overall dimensions and significantly complicates its placement on the vehicle. ③ If the low-temperature radiator, air-cooled condenser, and electronic fan are integrated into a cooling module located independently of the BTMS, both water and refrigerant piping must be connected to the cooling module, further complicating piping and placement.

[0008] Summary of the Invention

[0009] Based on this, it is necessary to provide a battery thermal management system and a new energy vehicle.

[0010] The battery thermal management system provided in the present application includes a first water pump, a battery heat exchange module, a battery cryocooler, a compressor, a water-cooled condenser, a throttle valve, a low-temperature radiator, an electronic fan, a second water pump and a control valve group. The battery cryocooler, the first water pump and the battery heat exchange module are connected through the control valve group to form a first circulation loop; the compressor, the water-cooled condenser, the throttle valve and the battery cryocooler are connected in sequence to form a second circulation loop; the low-temperature radiator, the second water pump and the water-cooled condenser are connected through the control valve group to form a third circulation loop; and the low-temperature radiator can be connected to the first water pump and the battery heat exchange module in sequence through the control valve group to form a fourth circulation loop. Among them, the first circulation loop and the second circulation loop can exchange heat through the battery cryocooler, the second circulation loop and the third circulation loop can exchange heat through the water-cooled condenser, and the electronic fan is arranged on one side of the low-temperature radiator so that the third circulation loop and the external environment can exchange heat through the low-temperature radiator.

[0011] In one embodiment, the battery thermal management system also includes a PTC heater, the control valve group includes a four-way valve and a third stop valve, the four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the second valve port and the first valve port to form a first circulation loop, the low-temperature radiator can be connected to the second water pump and the water-cooled condenser in sequence through the fourth valve port and the third valve port to form a third circulation loop, and the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module and the third stop valve in sequence through the fourth valve port and the first valve port to form a fourth circulation loop.

[0012] In one embodiment, the battery thermal management system also includes a PTC heater, the control valve group includes a first three-way valve and a second three-way valve, the first three-way valve is provided with a fifth valve port, a sixth valve port and a seventh valve port, the second three-way valve is provided with an eighth valve port, a ninth valve port and a tenth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the sixth valve port and the fifth valve port to form a first circulation loop, the water-cooled condenser can be connected to the low-temperature radiator and the second water pump in sequence through the ninth valve port and the eighth valve port to form a third circulation loop, and the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module, the tenth valve port and the eighth valve port in sequence through the seventh valve port and the fifth valve port to form a fourth circulation loop.

[0013] In one embodiment, the battery thermal management system also includes a PTC heater, the control valve group includes a third three-way valve, a first stop valve and a second stop valve, the third three-way valve is provided with an eleventh valve port, a twelfth valve port and a thirteenth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the twelfth valve port and the eleventh valve port to form a first circulation loop, the low-temperature radiator can be connected to the second water pump and the water-cooled condenser in sequence through the second stop valve to form a third circulation loop, and the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module and the first stop valve in sequence through the thirteenth valve port and the eleventh valve port to form a fourth circulation loop.

[0014] In one embodiment, the water-cooled condenser and the low-temperature radiator are spaced apart.

[0015] In one embodiment, a PTC heater is further included, and the PTC heater is arranged at the liquid inlet end of the battery heat exchange module.

[0016] In one embodiment, the battery deep cooler is provided at the liquid outlet of the battery heat exchange module.

[0017] In one embodiment, the water-cooled condenser is disposed between the outlet end of the compressor and the throttle valve, and the battery cryocooler is disposed at the inlet end of the compressor.

[0018] In one embodiment, the low-temperature heat sink is a fin heat sink.

[0019] The present application also provides a new energy vehicle, which includes the battery thermal management system described in any one of the above embodiments.

[0020] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] FIG1 is a first diagram of the connection pipelines of a battery thermal management system according to an embodiment of the present application.

[0023] FIG2 is a second diagram of the connection pipelines of a battery thermal management system according to an embodiment of the present application.

[0024] FIG3 is a third diagram of the connection pipelines of a battery thermal management system according to an embodiment of the present application.

[0025] FIG4 is a schematic diagram of a new energy vehicle according to an embodiment of the present application.

[0026] Figure 1: Battery thermal management system; 2: New energy vehicle; 101: First circulation loop; 102: Second circulation loop; 103: Third circulation loop; 104: Fourth circulation loop; 110: First water pump; 120: Second water pump; 200: PTC heater; 300: Battery heat exchange module; 310: Liquid inlet; 320: Liquid outlet; 400: Battery deep freezer; 500: Compressor; 510: Outlet; 520: Inlet; 600: Water-cooled condenser; 700: Throttle valve; 810: Low-temperature radiator; 820: Electronic fan; 9 00, control valve group; 910, four-way valve; 911, first valve port; 912, second valve port; 913, third valve port; 914, fourth valve port; 920, first three-way valve; 921, fifth valve port; 922, sixth valve port; 923, seventh valve port; 930, second three-way valve; 931, eighth valve port; 932, ninth valve port; 933, tenth valve port; 940, third three-way valve; 941, eleventh valve port; 942, twelfth valve port; 943, thirteenth valve port; 950, first stop valve; 960, second stop valve; 970, third stop valve. DETAILED DESCRIPTION

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0029] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] A battery thermal management system (BTMS) is a system designed to control battery temperature. With the rapid development of electric and new energy vehicles, batteries have become an indispensable component. However, batteries are prone to overheating and overcooling during use, which can affect battery performance, lifespan, and even safety. The BTMS's role is to promptly regulate battery temperature, ensuring it remains within the optimal operating temperature range. Therefore, the BTMS plays a crucial role in the safety, stability, and battery life of new energy vehicles.

[0034] Battery thermal management systems are generally classified into three cooling methods: air cooling, liquid cooling, and direct cooling. Liquid cooling is currently the most commonly used method. There are two main liquid cooling battery thermal management system solutions.

[0035] In the first solution, when the battery needs to be cooled, the refrigerant of the air conditioning system is generally used to cool the coolant passing through the battery chiller, and then the coolant is used to cool the battery. When the battery needs to be heated, the coolant is first heated by a PTC heater, and then the coolant is used to heat the battery. The disadvantages of the first solution are: under low ambient temperature conditions, the speed of the air conditioning system's compressor is low, and the compressor starts and stops frequently, causing the compressor to be easily damaged. In addition, the energy consumption of directly using the air conditioning system for cooling under low ambient temperature conditions is high.

[0036] In the second solution, the battery can be actively cooled when the ambient temperature is high, and passively cooled when the ambient temperature is low. Furthermore, PTC heating is also used for battery heating. Specifically, in low ambient temperature conditions, the coolant is directly cooled by a low-temperature radiator, which then cools the battery. This second solution overcomes the drawbacks of the first solution, such as the compressor's fragility and high energy consumption. However, it also has its own drawbacks, including: ① The co-location of the low-temperature radiator and air-cooled condenser reduces the air volume passing through the condenser, thereby reducing the cooling performance of the BTMS. ② To ensure the cooling performance of the BTMS, the power and specifications of the electronic fan must be increased, which increases the BTMS's overall dimensions and significantly complicates its placement on the vehicle. ③ If the low-temperature radiator, air-cooled condenser, and electronic fan are integrated into a cooling module located independently of the BTMS, both water and refrigerant piping must be connected to the cooling module, further complicating piping and placement.

[0037] Referring to Figures 1-3 , to overcome the problems of battery thermal management systems in related arts, such as frequent compressor starts and stops, high system energy consumption, poor low-temperature cooling performance, large BTMS volume, and difficulty in pipe connection and layout, the present application provides a battery thermal management system 1 and a new energy vehicle 2. The battery thermal management system 1 includes a first water pump 110, a PTC heater 200, a battery heat exchange module 300, a battery cryocooler 400, a compressor 500, a water-cooled condenser 600, a throttle valve 700, a low-temperature radiator 810, an electronic fan 820, a second water pump 120, and a control valve group 900.

[0038] The battery cryogenic cooler 400, the first water pump 110, the PTC heater 200 and the battery heat exchange module 300 are connected through the control valve group 900 to form a first circulation loop 101; the compressor 500, the water-cooled condenser 600, the throttle valve 700 and the battery cryogenic cooler 400 are connected in sequence to form a second circulation loop 102; the low-temperature radiator 810, the second water pump 120 and the water-cooled condenser 600 are connected through the control valve group 900 to form a third circulation loop 103; and the low-temperature radiator 810 can be connected to the first water pump 110, the PTC heater 200 and the battery heat exchange module 300 in sequence through the control valve group 900 to form a fourth circulation loop 104.

[0039] Among them, the first circulation loop 101 and the second circulation loop 102 can exchange heat through the battery deep cooler 400, the second circulation loop 102 and the third circulation loop 103 can exchange heat through the water-cooled condenser 600, and the electronic fan 820 is arranged on one side of the low-temperature radiator 810 so that the third circulation loop 103 and the external environment can exchange heat through the low-temperature radiator 810.

[0040] It should be noted that the second circulation loop 102 is a closed loop, the first circulation loop 101 and the third circulation loop 103 can be closed, and the first circulation loop 101 can also be connected to the third circulation loop 103 to form a fourth circulation loop 104.

[0041] Thus, when the ambient temperature is high, the battery thermal management system 1 is in active cooling mode. At this time, the electronic fan 820 blows air from the ambient environment toward the low-temperature radiator 810 to reduce the temperature of the refrigerant in the low-temperature radiator 810 to a minimum. Subsequently, under the action of the second water pump 120, the refrigerant passing through the low-temperature radiator 810 participates in the circulating cooling of the third circulation loop 103. At this time, the refrigerant in the third circulation loop 103 flows from the low-temperature radiator 810 through the control valve assembly 900 and the second water pump 120 into the water-cooled condenser 600, thereby cooling the refrigerant in the second circulation loop 102. Furthermore, at this time, the compressor 500 begins operating, and the refrigerant in the second circulation loop 102 is reduced to a low temperature and low pressure state through the throttle valve 700. The low temperature and low pressure refrigerant then enters the battery cryocooler 400 and exchanges heat with the refrigerant in the first circulation loop 101, thereby cooling the refrigerant in the first circulation loop 101. Afterwards, under the action of the first water pump 110, the refrigerant in the first circulation loop 101 leaves the battery cryogenic refrigerator 400 and enters the battery heat exchange module 300 to cool the battery until the battery is within a suitable temperature range. At this time, the PTC heater 200 does not work. As can be seen from the above, by using the water-cooled condenser 600 to replace the air-cooled condenser, and by setting the third circulation loop 103 to cool the refrigerant in the second circulation loop 102, there is no need to set the water-cooled condenser 600 and the low-temperature radiator 810 together, thereby not affecting the low-temperature cooling performance of the low-temperature radiator 810 and the water-cooled condenser 600, and there is no need to increase the power of the electronic fan 820. Furthermore, there is no need to make the low-temperature radiator 810, the water-cooled condenser 600 and the electronic fan 820 into a cooling module arranged independently relative to the BTMS and then install it, thereby reducing the difficulty of pipe connection and arrangement of the entire battery thermal management system 1. Furthermore, the refrigerant in the second circulation loop 102 is cooled by using the atmospheric temperature of the external environment through the third circulation loop 103 , thereby greatly reducing the power consumption of the compressor 500 .

[0042] When the ambient temperature is low, but the battery temperature is high, the battery thermal management system 1 is in passive cooling mode. At this time, the electronic fan 820 blows air from the ambient environment toward the low-temperature radiator 810 to minimize the refrigerant temperature within the low-temperature radiator 810. Subsequently, under the action of the second water pump 120, the refrigerant passing through the low-temperature radiator 810 participates in the circulating refrigeration of the fourth circulation loop 104. At this time, the refrigerant enters the battery heat exchange module 300 from the low-temperature radiator 810 through the control valve assembly 900 to cool the battery until the battery is within the appropriate temperature range. Furthermore, the PTC heater 200 and compressor 500 are not operating at this time. Therefore, when the ambient temperature is low, the fourth circulation loop 104 can be used directly to cool the battery, avoiding the problem of frequent starting and stopping of the compressor 500, which would result in increased power consumption of the battery thermal management system 1.

[0043] When the ambient temperature is low and the battery temperature is low, the refrigerant in the first circulation loop 101 is heated by the PTC heater 200. The heated refrigerant then enters the battery heat exchange module 300 to heat the battery. At this time, the electronic fan 820, the second water pump 120, and the compressor 500 are all inoperative.

[0044] When the battery thermal management system 1 is in self-circulation mode, the refrigerant in the first circulation loop 101 continuously circulates within the first circulation loop 101 to maintain a uniform temperature at all locations of the battery. At this time, the PTC heater 200, electronic fan 820, second water pump 120, and compressor 500 are all inoperative.

[0045] It should be noted that when the PTC heater 200 is not working, the refrigerant passing through the PTC heater 200 will not be heated.

[0046] The control valve group 900 may be an integrated single multi-way valve, a split multiple multi-way valve, or even a combination of a multi-way valve and a shut-off valve.

[0047] In one embodiment, the number of the electronic fans 820 may be one or more.

[0048] In one embodiment, as shown in FIG. 1 to FIG. 3 , the water-cooled condenser 600 and the low-temperature radiator 810 are spaced apart.

[0049] In this way, interference between the water-cooled condenser 600 and the low-temperature heat sink installation is avoided.

[0050] In one embodiment, as shown in FIG. 1 to FIG. 3 , the PTC heater 200 is disposed at the liquid inlet end 310 of the battery heat exchange module 300 .

[0051] In this way, it can be ensured that the refrigerant in the first circulation loop 101 can quickly enter the battery heat exchange module 300 after being heated by the PTC heater 200, thereby reducing the heat loss of the refrigerant.

[0052] In one embodiment, as shown in FIG. 1 to FIG. 3 , the battery cryocooler 400 is disposed at the liquid outlet 320 of the battery heat exchange module 300 .

[0053] In this way, the refrigerant with a relatively high temperature can quickly enter the battery deep cooler 400 , so that the battery deep cooler 400 can quickly cool the refrigerant.

[0054] In one embodiment, as shown in Figures 1-3, a water-cooled condenser 600 is disposed between the outlet port 510 of the compressor 500 and the throttle valve 700. This allows the refrigerant to first pass through the water-cooled condenser 600 to cool down after leaving the compressor 500, and then pass through the throttle valve 700 to cool down and reduce pressure, thereby reducing power consumption of the battery thermal management system 1.

[0055] Furthermore, the battery cryocooler 400 is disposed at the inlet end 520 of the compressor 500. This allows the refrigerant to be heated and vaporized by the battery cryocooler 400 before entering the compressor 500, thereby preventing liquid in the refrigerant entering the compressor 500 from causing liquid hammer and damage to the compressor 500.

[0056] In one embodiment, the low-temperature heat sink 810 is a fin heat sink.

[0057] This is beneficial for heat exchange between the low-temperature radiator 810 and the external environment.

[0058] Example 1

[0059] In this embodiment, as shown in FIG1 , the control valve assembly 900 includes a four-way valve 910 and a third shut-off valve 970 . The four-way valve 910 is provided with a first valve port 911, a second valve port 912, a third valve port 913, and a fourth valve port 914. The battery cryocooler 400 can sequentially connect to the first water pump 110, the PTC heater 200, and the battery heat exchange module 300 via the second valve port 912 and the first valve port 911, thereby forming a first circulation loop 101. The low-temperature radiator 810 can sequentially connect to the second water pump 120 and the water-cooled condenser 600 via the fourth valve port 914 and the third valve port 913, thereby forming a third circulation loop 103. The low-temperature radiator 810 can sequentially connect to the first water pump 110, the PTC heater 200, the battery heat exchange module 300, and the third shut-off valve 970 via the fourth valve port 914 and the first valve port 911, thereby forming a fourth circulation loop 104.

[0060] By controlling the switching of the communication mode of the four-way valve 910, the first circulation loop 101, the third circulation loop 103, and the fourth circulation loop 104 can be switched through the four-way valve 910, greatly improving the convenience of mode switching in the battery thermal management system 1. In addition, the control valve assembly 900 is equipped with only a single four-way valve 910, which reduces the complexity of the battery thermal management system 1, simplifies the installation difficulty of the control valve assembly 900 within the battery thermal management system 1, and reduces the number of components required for the battery thermal management system 1, thereby reducing the manufacturing cost of the battery thermal management system 1.

[0061] Example 2

[0062] In this embodiment, as shown in FIG2 , the control valve assembly 900 includes a first three-way valve 920 and a second three-way valve 930 . The first three-way valve 920 is provided with a fifth valve port 921 , a sixth valve port 922 , and a seventh valve port 923 , and the second three-way valve 930 is provided with an eighth valve port 931 , a ninth valve port 932 , and a tenth valve port 933 . The battery cryocooler 400 can sequentially connect to the first water pump 110 , the PTC heater 200 , and the battery heat exchange module 300 via the sixth valve port 922 and the fifth valve port 921 , thereby forming a first circulation loop 101 . The water-cooled condenser 600 can sequentially connect to the low-temperature radiator 810 and the second water pump 120 via the ninth valve port 932 and the eighth valve port 931 , thereby forming a third circulation loop 103 . The low-temperature radiator 810 can be connected to the first water pump 110 , the PTC heater 200 , the battery heat exchange module 300 , the tenth valve port 933 and the eighth valve port 931 in sequence through the seventh valve port 923 and the fifth valve port 921 to form a fourth circulation loop 104 .

[0063] Such an arrangement reduces the length of the pipeline of the battery thermal management system 1 and reduces the pipeline connection cost of the battery thermal management system 1 .

[0064] Example 3

[0065] In this embodiment, as shown in FIG3 , the control valve assembly 900 includes a third three-way valve 940, a first shut-off valve 950, and a second shut-off valve 960. The third three-way valve 940 is provided with an eleventh valve port 941, a twelfth valve port 942, and a thirteenth valve port 943. The battery cryocooler 400 can sequentially connect to the first water pump 110, the PTC heater 200, and the battery heat exchange module 300 via the twelfth valve port 942 and the eleventh valve port 941, thereby forming a first circulation loop 101. The low-temperature radiator 810 can sequentially connect to the second water pump 120 and the water-cooled condenser 600 via the second shut-off valve 960, thereby forming a third circulation loop 103. The low-temperature radiator 810 can sequentially connect to the first water pump 110, the PTC heater 200, the battery heat exchange module 300, and the first shut-off valve 950 via the thirteenth valve port 943 and the eleventh valve port 941, thereby forming a fourth circulation loop 104.

[0066] In this way, the number of multi-way valves required for the battery thermal management system 1 is reduced, thereby lowering the manufacturing cost of the battery thermal management system 1 .

[0067] Please refer to FIG. 1 and FIG. 4 again. The present application further provides a new energy vehicle 2 . The new energy vehicle 2 includes the battery thermal management system 1 described in any one of the above embodiments.

[0068] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that variations and improvements are possible within the scope of the present application, as would be apparent to one skilled in the art. These variations and improvements fall within the scope of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A battery thermal management system, characterized in that: It includes the first water pump, battery heat exchange module, battery deep freezer, compressor, water-cooled condenser, throttle valve, low-temperature radiator, electronic fan, second water pump and control valve group. The battery deep cooler, the first water pump and the battery heat exchange module are connected through the control valve group to form a first circulation loop; the compressor, the water-cooled condenser, the throttle valve and the battery deep cooler are connected in sequence to form a second circulation loop; the low-temperature radiator, the second water pump and the water-cooled condenser are connected through the control valve group to form a third circulation loop; and the low-temperature radiator can be connected to the first water pump and the battery heat exchange module in sequence through the control valve group to form a fourth circulation loop; Among them, the first circulation loop and the second circulation loop can exchange heat through the battery deep cooler, the second circulation loop and the third circulation loop can exchange heat through the water-cooled condenser, and the electronic fan is arranged on one side of the low-temperature radiator so that the third circulation loop and the external environment can exchange heat through the low-temperature radiator.

2. The battery thermal management system according to claim 1, wherein: It also includes a PTC heater, the control valve group includes a four-way valve and a third stop valve, the four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the second valve port and the first valve port to form the first circulation loop, the low-temperature radiator can be connected to the second water pump and the water-cooled condenser in sequence through the fourth valve port and the third valve port to form the third circulation loop, the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module and the third stop valve in sequence through the fourth valve port and the first valve port to form the fourth circulation loop.

3. The battery thermal management system according to claim 1, wherein: It also includes a PTC heater, and the control valve group includes a first three-way valve and a second three-way valve, the first three-way valve is provided with a fifth valve port, a sixth valve port and a seventh valve port, the second three-way valve is provided with an eighth valve port, a ninth valve port and a tenth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the sixth valve port and the fifth valve port to form the first circulation loop, the water-cooled condenser can be connected to the low-temperature radiator and the second water pump in sequence through the ninth valve port and the eighth valve port to form the third circulation loop, and the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module, the tenth valve port and the eighth valve port in sequence through the seventh valve port and the fifth valve port to form the fourth circulation loop.

4. The battery thermal management system according to claim 1, wherein: It also includes a PTC heater, and the control valve group includes a third three-way valve, a first stop valve and a second stop valve, the third three-way valve is provided with an eleventh valve port, a twelfth valve port and a thirteenth valve port, the battery deep cooler can be connected to the first water pump, the PTC heater and the battery heat exchange module in sequence through the twelfth valve port and the eleventh valve port to form the first circulation loop, the low-temperature radiator can be connected to the second water pump and the water-cooled condenser in sequence through the second stop valve to form the third circulation loop, and the low-temperature radiator can be connected to the first water pump, the PTC heater, the battery heat exchange module and the first stop valve in sequence through the thirteenth valve port and the eleventh valve port to form the fourth circulation loop.

5. The battery thermal management system according to claim 1, wherein: The water-cooled condenser and the low-temperature radiator are arranged at intervals.

6. The battery thermal management system according to claim 1, wherein: It also includes a PTC heater, which is arranged at the liquid inlet end of the battery heat exchange module.

7. The battery thermal management system according to claim 1, wherein: The battery deep cooler is arranged at the liquid outlet end of the battery heat exchange module.

8. The battery thermal management system according to claim 1, wherein: The water-cooled condenser is arranged between the outlet end of the compressor and the throttle valve, and the battery deep cooler is arranged at the inlet end of the compressor.

9. The battery thermal management system according to claim 1, wherein: The low-temperature radiator is a fin radiator.

10. A new energy vehicle, characterized in that: Comprising a battery thermal management system as described in any one of claims 1 to claim 9.

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