Vehicle thermal management system and all-terrain vehicle

Abstract

The utility model discloses a vehicle thermal management system and an all-terrain vehicle, the vehicle thermal management system comprises a liquid heater, a first water pump, a liquid-liquid exchanger, a power battery assembly, a second water pump and a cooling system, the liquid heater, the first water pump and a first chamber of the liquid-liquid exchanger are connected in series to form a first circulating water path; a heat exchange pipeline of the power battery assembly, a second water pump and a second cavity of the liquid-liquid exchanger are connected in series to form a second circulating water path, the cooling system comprises a cooler, and the cooler is used for cooling the second circulating water path. The vehicle thermal management system has the advantages that electric energy of the power battery assembly does not need to be consumed when the power battery assembly is heated, and the temperature rise of the power battery assembly is fast.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle thermal management system and an all-terrain vehicle. Background Art

[0002] With the development of electrification of all-terrain vehicles, power batteries are the most core components of the three-electric system. The temperature of the battery cell is a key factor affecting the discharge power and charging power of the power battery. High or low battery cell temperature will cause the discharge power or charging power of the lithium-ion power battery to decrease, resulting in a lower rate of achievement of cruising range or prolonged charging time. Especially in the severe winter, the power lithium battery cannot discharge, and when there is no external interface for charging, the traditional PTC heating solution cannot provide heating for the power battery, and the vehicle cannot be driven in extremely cold temperatures. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a vehicle thermal management system, which has the advantages of not consuming the power battery assembly's own electrical energy when heating the power battery assembly and causing the power battery assembly to rise in temperature quickly.

[0005] The embodiment of the present utility model further provides an all-terrain vehicle.

[0006] The vehicle thermal management system of an embodiment of the present utility model includes a liquid heater, a first water pump, a liquid-liquid exchanger, a power battery assembly and a second water pump, and a cooling system. The liquid heater, the first water pump and the first chamber of the liquid-liquid exchanger are connected in series to form a first circulating water circuit; the heat exchange pipeline of the power battery assembly, the second water pump and the second chamber of the liquid-liquid exchanger are connected in series to form a second circulating water circuit; the cooling system includes a cooler, which is used to cool the second circulating water circuit.

[0007] According to the vehicle thermal management system of an embodiment of the present invention, the liquid heater heats the coolant in the first circulating water circuit during operation, and the first water pump drives the heated coolant to circulate. The coolant flowing into the first chamber of the liquid-liquid exchanger exchanges heat with the coolant in the second chamber of the liquid-liquid exchanger to heat the coolant in the second circulating water circuit, thereby heating the power battery assembly in the second circulating water circuit. This ensures that the power battery assembly temperature rises to within a set temperature range without generating power. The operation of the liquid heater is essentially unaffected by the external temperature, resulting in a high temperature rise efficiency for the power battery assembly.

[0008] In addition, the vehicle thermal management system also cools the second circulation water circuit through a cooler instead of a liquid-liquid exchanger to effectively cool the power battery assembly when the temperature is too high. This setting not only ensures that the power battery assembly has stable charging and discharging power, but also separates the heating system and cooling system of the power battery assembly, effectively avoiding the two sharing a liquid-liquid exchanger and affecting the temperature control reliability of the vehicle thermal management system on the power battery assembly.

[0009] In some embodiments, the cooling system also includes a compressor, a pressure switch, a first condenser and a first expansion valve. The compressor, the pressure switch, the first condenser, the first expansion valve and the first chamber of the cooler are connected in series in sequence to form a third circulating water circuit, and the second chamber of the cooler is connected in series to the second circulating water circuit.

[0010] In some embodiments, the vehicle thermal management system further includes a first expansion kettle, which is connected in series to the first circulating water circuit.

[0011] In some embodiments, the vehicle thermal management system further includes a second expansion kettle, which is connected in series to the second circulating water circuit.

[0012] In some embodiments, the vehicle thermal management system further includes an oil pump and a fuel tank, and the fuel tank, the oil pump, and the liquid heater are sequentially connected in series through an oil pipeline.

[0013] In some embodiments, the vehicle thermal management system further includes a second expansion valve and an evaporator, and the compressor, the pressure switch, the first condenser, the second expansion valve and the evaporator are sequentially connected in series to form a third circulating water circuit.

[0014] In some embodiments, the vehicle thermal management system further includes a cooling fan installed beside the first condenser to dissipate heat for the first condenser.

[0015] In some embodiments, the vehicle thermal management system further includes a warm air exchanger, which is connected in series to the first circulating water path.

[0016] In some embodiments, the vehicle thermal management system further includes an engine and a second radiator, and the liquid heater, the first water pump, the engine and the second radiator are connected in series to form a fourth circulating water circuit.

[0017] An all-terrain vehicle according to an embodiment of the present invention includes the vehicle thermal management system as described in any one of the above embodiments.

[0018] The technical advantages of the all-terrain vehicle according to the embodiment of the present utility model are the same as the technical advantages of the vehicle thermal management system of the above embodiment, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural layout diagram of a vehicle thermal management system according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] 1. Liquid heater; 2. First water pump; 3. Liquid-liquid exchanger; 4. Power battery assembly; 5. Second water pump; 6. Compressor; 7. Pressure switch; 8. First condenser; 9. First expansion valve; 10. Cooler; 11. First expansion kettle; 12. Second expansion kettle; 13. Oil pump; 14. Fuel tank; 15. Cooling fan. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0023] The following combination Figure 1 A vehicle thermal management system according to an embodiment of the present invention is described.

[0024] The vehicle thermal management system of this embodiment includes a liquid heater 1, a first water pump 2, a liquid-liquid exchanger 3, a power battery assembly 4, a second water pump 5, and a cooling system. The liquid heater 1, the first water pump 2, and the first chamber of the liquid-liquid exchanger 3 are connected in series to form a first circulating water circuit. The heat exchange piping of the power battery assembly 4, the second water pump 5, and the second chamber of the liquid-liquid exchanger 3 are connected in series to form a second circulating water circuit. The cooling system includes a cooler 10, which is used to cool the second circulating water circuit.

[0025] According to the vehicle thermal management system of the present invention, when in operation, the liquid heater 1 heats the coolant in the first circulating water circuit, and the first water pump 2 drives the heated coolant to circulate. The coolant flowing into the first chamber of the liquid-liquid exchanger 3 exchanges heat with the coolant in the second chamber of the liquid-liquid exchanger 3, thereby heating the coolant in the second circulating water circuit, and thus heating the power battery assembly 4 in the second circulating water circuit. This ensures that the temperature of the power battery assembly 4 rises to a set temperature range without generating power. The operation of the liquid heater 1 is basically unaffected by the external temperature, and the temperature rise efficiency of the power battery assembly 4 is high.

[0026] In addition, the vehicle thermal management system also cools the second circulating water circuit through the cooler 10 instead of the liquid-liquid exchanger 3, so as to effectively cool the power battery assembly 4 when the temperature is too high. This setting not only ensures that the power battery assembly 4 has stable charging and discharging power, but also separates the heating system and cooling system of the power battery assembly 4, effectively avoiding the two sharing a liquid-liquid exchanger 3 and affecting the temperature control reliability of the vehicle thermal management system on the power battery assembly 4.

[0027] It should be noted that when the temperature of the power battery assembly 4 rises to within the set temperature range, the discharge power and charging power of the power battery assembly 4 can be guaranteed even in extremely cold weather, effectively avoiding a reduction in the range achievement rate of the power battery assembly 4 and an extension of the charging time.

[0028] In addition, the operation of the vehicle thermal management system can be achieved through the Internet of Vehicles or on-board buttons such as APP, Bluetooth, and remote control. The liquid heater 1 is a fuel heater in the relevant technology. Its specific structure is not described here. When it is turned on, the internal ignition device works, the ignition device ignites the fuel, and the flame formed by the combustion of the fuel realizes the heating of the coolant in the first circulation water circuit.

[0029] In some embodiments, as Figure 1 As shown, the cooling system also includes a compressor 6, a pressure switch 7, a first condenser 8 and a first expansion valve 9. The compressor 6, the pressure switch 7, the first condenser 8, the first expansion valve 9 and the first chamber of the cooler 10 are connected in series in sequence to form a third circulating water circuit, and the second chamber of the cooler 10 is connected in series to the second circulating water circuit.

[0030] That is, when the temperature of the power battery assembly 4 is too high and exceeds the set value, the compressor 6 starts working. When the compressor 6 reaches a certain pressure, the pressure switch 7 opens, and the coolant passes through the first condenser 8 and the first expansion valve 9 in sequence to cool the coolant in the third circulating water circuit. When the coolant passes through the first chamber of the cooler 10, it can exchange heat with the coolant in the second chamber to cool the coolant in the second circulating water circuit, thereby achieving the purpose of cooling the power battery assembly 4.

[0031] In some embodiments, as Figure 1 As shown, the vehicle thermal management system further includes a first expansion kettle 11, which is connected in series to the first circulating water path.

[0032] The first expansion kettle 11 can store water vapor from the first circulating water circuit, which refluxes after cooling, thereby balancing the pressure of the first circulating water circuit. It is also convenient to judge whether the coolant in the first circulating water circuit is leaking by observing the first expansion kettle 11, thereby ensuring that there is sufficient coolant in the first circulating water circuit and effectively ensuring the working reliability of the vehicle thermal management system.

[0033] Specifically, the first expansion kettle 11 is located between the liquid-liquid exchanger 3 and the liquid heater 1. The first expansion kettle 11 is preferably arranged in the engine compartment of the vehicle. Coolant can be added to the first expansion kettle 11 regularly to ensure that there is sufficient coolant in the first circulating water circuit.

[0034] In some embodiments, as Figure 1 As shown, the vehicle thermal management system further includes a second expansion kettle 12 , which is connected in series to the second circulating water path.

[0035] The second expansion kettle 12 can store water vapor from the second circulating water circuit, which refluxes after cooling, thereby balancing the pressure of the second circulating water circuit. It is also convenient to judge whether the coolant in the second circulating water circuit is leaking by observing the second expansion kettle 12, thereby ensuring that there is sufficient coolant in the second circulating water circuit. The vehicle thermal management system has higher heating reliability and stability for the power battery assembly 4.

[0036] Specifically, the second expansion kettle 12 is located between the cooler 10 and the second water pump 5. The second expansion kettle 12 is preferably arranged in the engine compartment of the vehicle. Coolant can be added to the second expansion kettle 12 regularly to ensure sufficient coolant in the second circulating water circuit.

[0037] In some embodiments, as Figure 1 As shown, the vehicle thermal management system further includes an oil pump 13 and a fuel tank 14 , and the fuel tank 14 , the oil pump 13 and the liquid heater 1 are sequentially connected in series through an oil pipeline.

[0038] When liquid heater 1 needs to operate, fuel pump 13 pumps fuel from fuel tank 14 into liquid heater 1. An ignition device within liquid heater 1 ignites the fuel, thereby starting liquid heater 1. Supplying fuel to liquid heater 1 from fuel tank 14 eliminates the need for a separate auxiliary fuel tank, further reducing the size of the vehicle's thermal management system and occupying less space within the vehicle.

[0039] In some embodiments, the vehicle thermal management system further includes a second expansion valve and an evaporator, and the compressor 6, the pressure switch 7, the first condenser 8, the second expansion valve and the evaporator are sequentially connected in series to form a third circulating water circuit.

[0040] In other words, compressor 6, pressure switch 7, first condenser 8, second expansion valve, and evaporator also form the vehicle air conditioning and refrigeration system, cooling the cockpit and passenger compartment. This eliminates the need for two separate sets of compressor 6, pressure switch 7, and first condenser 8, simplifying the vehicle thermal management system and reducing costs.

[0041] In some embodiments, the vehicle thermal management system further includes a cooling fan 15 , which is installed beside the first condenser 8 to dissipate heat for the first condenser 8 .

[0042] The provision of the cooling fan 15 further improves the heat dissipation efficiency of the first condenser 8 , thereby further improving the cooling efficiency of the air-conditioning refrigeration system, and the vehicle thermal management system cools the power battery assembly 4 faster.

[0043] In some embodiments, the vehicle thermal management system further includes a warm air exchanger, which is connected in series to the first circulating water path.

[0044] That is, when the liquid heater 1 is operating, it can also heat the passenger compartment, cockpit, windshield, and other areas with air outlets through the warm air exchanger, thereby achieving passenger heating and / or defrosting and defogging functions. Furthermore, the engine can be kept idle during this process, thus avoiding exhaust emissions or personal injury caused by prolonged engine idling when parked.

[0045] Specifically, the warm air exchanger and evaporator are located in the same location in the vehicle, and both use the same fan to blow heat from them into the vehicle cabin. For example, when the compressor 6 is operating, airflow through the evaporator forms cold air, which is blown into the vehicle cabin by the fan. For example, when the liquid heater 1 is operating, airflow through the warm air exchanger forms warm air, which is blown into the vehicle cabin by the fan.

[0046] In some embodiments, the vehicle thermal management system further includes an engine and a second radiator, and the liquid heater 1 , the first water pump 2 , the engine and the second radiator are connected in series to form a fourth circulating water circuit.

[0047] Therefore, when the liquid heater 1 is working, it can heat the coolant in the fourth circulating water circuit to heat the engine body, internal water circuit and engine oil, avoiding carbon deposits and exhaust emissions caused by engine idling when the vehicle is parked.

[0048] Specifically, the vehicle thermal management system also includes a three-way valve, which is serially connected to the first circulating water circuit via a first interface and a second interface, and to the fourth circulating water circuit via a first interface and a third interface. The three-way valve is located between the liquid-liquid exchanger 3 and the warm air exchanger in the first circulating water circuit, and between the liquid-liquid exchanger 3 and the engine in the fourth circulating water circuit. The warm air exchanger is also serially connected to the fourth circulating water circuit.

[0049] An all-terrain vehicle according to an embodiment of the present invention includes a vehicle thermal management system as described in any of the above embodiments.

[0050] The technical advantages of the all-terrain vehicle according to the embodiment of the present utility model are the same as the technical advantages of the vehicle thermal management system of the above embodiment, and will not be repeated here.

[0051] In the description of the present invention, 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 to 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 invention 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 to the present invention.

[0052] 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 specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this utility model, 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, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0054] In the present invention, 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 intermediary. 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.

[0055] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0056] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A vehicle thermal management system, characterized in that: include: A liquid heater, a first water pump and a liquid-liquid exchanger, wherein the liquid heater, the first water pump and the first chamber of the liquid-liquid exchanger are connected in series to form a first circulating water circuit; a power battery assembly and a second water pump, wherein the heat exchange pipeline of the power battery assembly, the second water pump and the second chamber of the liquid-liquid exchanger are connected in series to form a second circulating water circuit; A cooling system includes a cooler, and the cooler is used to cool the second circulating water circuit.

2. The vehicle thermal management system according to claim 1, characterized in that: The cooling system also includes a compressor, a pressure switch, a first condenser and a first expansion valve. The compressor, the pressure switch, the first condenser, the first expansion valve and the first chamber of the cooler are connected in series in sequence to form a third circulating water circuit, and the second chamber of the cooler is connected in series to the second circulating water circuit.

3. The vehicle thermal management system according to claim 2, characterized in that: The vehicle thermal management system further includes a first expansion kettle, which is connected in series to the first circulating water path.

4. The vehicle thermal management system according to claim 2, characterized in that: The vehicle thermal management system further includes a second expansion kettle, which is connected in series to the second circulating water path.

5. The vehicle thermal management system according to claim 1, characterized in that: The vehicle thermal management system further includes an oil pump and a fuel tank, wherein the fuel tank, the oil pump and the liquid heater are sequentially connected in series via an oil pipeline.

6. The vehicle thermal management system according to claim 2, characterized in that: The vehicle thermal management system further includes a second expansion valve and an evaporator. The compressor, the pressure switch, the first condenser, the second expansion valve and the evaporator are sequentially connected in series to form a third circulating water circuit.

7. The vehicle thermal management system according to claim 6, characterized in that: The vehicle thermal management system further includes a cooling fan installed beside the first condenser to dissipate heat for the first condenser.

8. The vehicle thermal management system according to claim 1, characterized in that: The vehicle thermal management system further includes a warm air exchanger, which is connected in series to the first circulating water path.

9. The vehicle thermal management system according to claim 8, characterized in that: The vehicle thermal management system further includes an engine and a second radiator. The liquid heater, the first water pump, the engine and the second radiator are connected in series to form a fourth circulating water circuit.

10. An all-terrain vehicle, characterized in that: The vehicle thermal management system comprises the vehicle thermal management system according to any one of claims 1 to 9.

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