Vehicle cooling system and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a vehicle cooling system and a vehicle, and the vehicle cooling system comprises a first low-temperature radiator and a second low-temperature radiator which are connected in parallel with a nine-way valve, and a water-cooling intercooler and a motor assembly which are connected in parallel with the nine-way valve, the first low-temperature radiator is connected with the nine-way valve through a first branch, the second low-temperature radiator is connected with the nine-way valve through a second branch and a third branch, the second branch is connected with the third branch in parallel, the water-cooling intercooler is connected with the nine-way valve through a fourth branch, and the motor assembly is connected with the nine-way valve through a fifth branch. A nine-way valve is used for controlling respective on-off of the five branches and on-off among the branches, so that the cooling mode can be flexibly adjusted under different vehicle working conditions, the problem that the temperature of cooling liquid of a motor with the in-situ rapid charging function of a plug-in hybrid vehicle is high can be effectively solved, and the working temperature of a battery in a pure electric mode can be ensured; and the oil consumption of the hybrid mode engine is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicles, and particularly relates to a vehicle cooling system and a vehicle. BACKGROUND

[0002] A parallel hybrid electric vehicle (P-HEV) is a vehicle combining two power sources of an engine and an electric motor. Compared with a traditional fuel vehicle, the P-HEV has lower fuel consumption and longer cruising range, and the off-road experience of the customer is better because of the power assistance of the electric motor. However, the battery power is rapidly reduced in the off-road scene, and thus the power output and playability of the vehicle are limited. In order to ensure the power and playability of the vehicle, the P-HEV increases the function of rapid power compensation on site to ensure sufficient battery power.

[0003] However, the size of the low-temperature radiator of the P-HEV is limited due to the limitation of the engine compartment space, and thus the heat dissipation performance is limited. In a high ambient temperature, there is no travel wind for the power compensation on site, the heat load of the high-power compensation engine is large, the heat load of the condenser of the air conditioning system is also large due to the double refrigeration of the battery and the passenger compartment, and in addition, the heat backflow in the engine compartment is serious, and the working condition is extremely harsh, so that the inlet cooling liquid temperature of the low-temperature circuit components is over-temperature, and the power is limited, such as the power of the DCDC components, which will limit the low-voltage power consumption of the vehicle, and thus affect the functions of the vehicle.

[0004] Therefore, the prior art still has certain defects Content of the utility model

[0005] Therefore, the utility model aims to provide a vehicle cooling system and a vehicle to effectively solve the problem of high motor cooling liquid temperature of the function of rapid power compensation on site of the P-HEV, and ensure the working temperature of the battery in the pure electric mode and reduce the fuel consumption of the engine in the hybrid mode.

[0006] To achieve the above object, the technical scheme of the utility model is as follows:

[0007] A vehicle cooling system, the vehicle cooling system comprises a first low-temperature radiator, a second low-temperature radiator and a water-cooled intercooler and a motor assembly connected in parallel to a nine-way valve, the first low-temperature radiator is connected with the nine-way valve through a first branch, the second low-temperature radiator is connected with the nine-way valve through a second branch and a third branch, the water-cooled intercooler is connected with the nine-way valve through a fourth branch, and the motor assembly is connected with the nine-way valve through a fifth branch.

[0008] In the above scheme, the on-off of the above five branches and the on-off between the first branch, the second branch, the third branch, the fourth branch and the fifth branch can be flexibly adjusted under different vehicle working conditions to adjust the cooling mode, which not only effectively solves the problem of high temperature of the motor cooling liquid in the plug-in hybrid electric vehicle, but also ensures the working temperature of the battery in the pure electric mode and reduces the fuel consumption of the engine in the hybrid mode.

[0009] As a preferred embodiment of the present application, two flow paths with different lengths are arranged in the second low-temperature radiator, the two flow paths share one inlet and are respectively provided with one outlet, and the outlets of the two flow paths are connected with the nine-way valve through the second branch and the third branch respectively.

[0010] Preferably, the second low-temperature radiator adopts a U-shaped flow structure, which can prolong the flow path of the cooling liquid in the second low-temperature radiator, thereby improving the cooling and heat dissipation effect of the cooling liquid. At the same time, when the temperature of the motor cooling liquid is high, the cooling liquid can be circulated twice to cool the motor, thereby improving the cooling efficiency and cooling effect of the motor, so as to ensure that the working temperature of the motor is within a preferable temperature range and the motor works safely and stably.

[0011] As a preferred embodiment of the present application, the second branch is connected with the fourth branch through the nine-way valve to form a first intercooler cooling circuit, the first branch is connected with the fourth branch through the nine-way valve to form a second intercooler cooling circuit, the third branch is connected with the fifth branch through the nine-way valve to form a first motor cooling circuit, the second branch and the third branch are connected with the fifth branch through the nine-way valve to form a second motor cooling circuit, the first branch is connected with the fifth branch through the nine-way valve to form a third motor cooling circuit, the fourth branch forms an intercooler self-circulation circuit through the nine-way valve, and the fifth branch forms a motor self-circulation circuit through the nine-way valve.

[0012] In the above scheme, the on-off control of multiple intercooler cooling circuits and multiple motor cooling circuits is realized through one nine-way valve, which reduces the valve setting compared with the existing circuit control mode using multiple three-way valves and four-way valves, is conducive to simplifying the circuit structure and can better adapt to the limited installation space in the vehicle cabin, optimizes the pipeline layout, thereby improving the cooling circulation efficiency to further improve the cooling efficiency and cooling effect.

[0013] As a preferred embodiment of the present application, in the first communication mode of the nine-way valve, the intercooler self-circulation circuit is connected, and the motor self-circulation circuit is connected.

[0014] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the low-power state in the pure electric mode, can guarantee the working temperature during the operation of the motor, can reduce the heat dissipation power consumption, is conducive to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0015] As a preferred embodiment of the present application, in the second communication mode of the nine-way valve, the intercooled self-circulation circuit is communicated, and the second motor cooling circuit is communicated.

[0016] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the medium-high power state in the pure electric mode, can guarantee the working temperature during the operation of the motor, can reduce the heat dissipation power consumption, is conducive to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0017] As a preferred embodiment of the present application, in the third communication mode of the nine-way valve, the intercooled self-circulation circuit is communicated, the second motor cooling circuit is communicated, and the third motor cooling circuit is communicated.

[0018] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power state in the pure electric mode, can guarantee the working temperature during the operation of the motor, can reduce the heat dissipation power consumption, is conducive to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0019] As a preferred embodiment of the present application, in the fourth communication mode of the nine-way valve, the first intercooled cooling circuit is communicated, the second intercooled cooling circuit is communicated, and the motor self-circulation circuit is communicated.

[0020] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the hybrid stationary power supply mode in the low-power state, can meet the heat dissipation demand of the water-cooled intercooler when the engine participates in power generation, guarantee the engine in a good operating state to reduce the hybrid fuel consumption, can meet the heat dissipation demand of the motor during the inverter power generation, guarantee the motor in a good operating state and operating environment, thereby being conducive to guaranteeing the use safety of the motor and prolonging the service life of the motor.

[0021] As a preferred embodiment of the present application, in the fifth communication mode of the nine-way valve, the first intercooled cooling circuit is communicated, the second intercooled cooling circuit is communicated, and the first motor cooling circuit is communicated.

[0022] In the above scheme, the above-mentioned communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power state of the hybrid original site power supply mode. On the one hand, it can meet the heat dissipation demand of the water-cooled intercooler when the engine participates in power generation, ensure that the engine is in a good operating state to reduce hybrid fuel consumption, and on the other hand, it can meet the heat dissipation demand of the motor in the inverter power generation process, ensure that the motor is in a good operating state and operating environment, thereby facilitating the safety of the motor and prolonging the service life of the motor.

[0023] As a preferred embodiment of the present application, in the sixth communication mode of the nine-way valve, the first intercooler cooling circuit is communicated, the first motor cooling circuit is communicated, and the third motor cooling circuit is communicated.

[0024] The above-mentioned communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power state of the hybrid original site power supply mode. On the one hand, it can meet the heat dissipation demand of the water-cooled intercooler when the engine participates in power generation, ensure that the engine is in a good operating state to reduce hybrid fuel consumption, and on the other hand, it can meet the heat dissipation demand of the motor in the inverter power generation process, ensure that the motor is in a good operating state and operating environment, thereby facilitating the safety of the motor and prolonging the service life of the motor.

[0025] As a preferred embodiment of the present application, a water pump assembly is further included, which at least includes a second electronic water pump arranged on the first branch and a third electronic water pump arranged on the fifth branch. Preferably, the water pump assembly further includes a first electronic water pump arranged upstream of the second low-temperature radiator.

[0026] In the above scheme, by arranging the water pump assembly, the flow efficiency of the cooling liquid in each cooling circuit can be ensured, thereby ensuring the cooling efficiency and cooling effect.

[0027] As a preferred embodiment of the present application, a temperature detection member is further included, which is arranged on the fifth branch and is used for detecting the temperature of the cooling liquid flowing into the motor assembly.

[0028] In the above scheme, by arranging the temperature detection member, the temperature of the cooling liquid flowing to the motor can be accurately grasped in real time, thereby facilitating the control of the on-off of each interface of the nine-way valve according to the temperature of the cooling liquid to control the on-off of each cooling circuit, and further realizing accurate and efficient control of the cooling system.

[0029] As a preferred embodiment of the present application, the fifth branch includes at least one sub-branch, and a plurality of sub-branches are connected in parallel. Preferably, a proportional three-way valve for adjusting the flow ratio of each sub-branch is further arranged on the fifth branch.

[0030] The fifth branch is connected with the components in the motor assembly flexibly, and the cooling liquid flow is distributed among the branches, so that the cooling effect and the cooling efficiency of the components in the motor assembly are improved.

[0031] Another object of the present application is a vehicle provided with the vehicle cooling system as described above.

[0032] The vehicle has the same beneficial effects as the vehicle cooling system, and thus will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are included to provide a further understanding of the present application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0034] Figure 1 Fig. 1 is a structural schematic diagram of a vehicle cooling system in the present application;

[0035] Figure 2 Fig. 2 is a path schematic diagram of a first inter-cooling cooling circuit;

[0036] Figure 3 Fig. 3 is a path schematic diagram of a second inter-cooling cooling circuit;

[0037] Figure 4 Fig. 4 is a path schematic diagram of an inter-cooling self-circulation circuit;

[0038] Figure 5 Fig. 5 is a path schematic diagram of a first motor cooling circuit;

[0039] Figure 6 Fig. 6 is a path schematic diagram of a second motor cooling circuit;

[0040] Figure 7 Fig. 7 is a path schematic diagram of a third motor cooling circuit;

[0041] Figure 8 Fig. 8 is a path schematic diagram of a motor self-circulation circuit;

[0042] Figure 9 Fig. 9 is a structural schematic diagram of a second low-temperature radiator.

[0043] List of components and reference numerals:

[0044] 1 first low temperature radiator, 2 condenser, 3 second low temperature radiator, 4 high temperature radiator, 5 nine-way valve, 6 water-cooled intercooler, 7 P2 motor controller, 8 P2 motor, 9 transmission oil cooler, 10 converter and on-board charger, 11 P4 motor controller, 12 P4 motor, 13 rear axle reducer oil cooler, 14 temperature detection piece, 15 gas overflow tank, 16 first electronic water pump, 17 fan, 18 second electronic water pump, 19 third electronic water pump, 20 intelligent driving controller, 21 one-way throttle valve;

[0045] 101 first branch, 102 second branch, 103 third branch, 104 fourth branch, 105 fifth branch, 1051 first sub-branch, 1052 second sub-branch. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0047] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the application, but the application can also be implemented in other ways different from those described herein, therefore, the protection scope of the application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the application and the features in each embodiment can be combined with each other without conflict.

[0048] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation to the present application.

[0049] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0050] In this application, unless otherwise clearly indicated and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0051] At present, there are also some plug-in hybrid vehicles that set two low-temperature radiators to improve the cooling effect of the water-cooled intercooler 6 and the motor assembly. However, in the existing scheme, the two low-temperature radiators are usually connected in series to stack the heat dissipation capacity to improve the heat dissipation effect. Although this setting method can improve the heat dissipation effect, it has poor adaptability to the heat dissipation demand under different vehicle states. In a low-temperature environment, the working temperature of the engine / motor is not enough to affect its working efficiency, which increases the fuel consumption and power consumption and affects the cruising range of the vehicle. In the prior art, two low-temperature radiators are also connected in parallel, but the two parallel low-temperature radiators are not controlled separately, and the actual effect is equivalent to the series connection mode. The above problems still exist when the series connection mode is used.

[0052] To solve the above problems, the present application provides a vehicle cooling system and a vehicle.

[0053] In the first aspect, with reference to Figures 1-9As shown, the present application proposes a vehicle cooling system, which comprises a first low-temperature radiator 1, a second low-temperature radiator 3 connected in parallel to a nine-way valve 5, and a water-cooled intercooler 6 and a motor assembly connected in parallel to the nine-way valve 5. The first low-temperature radiator 1 is connected to the nine-way valve 5 through a first branch 101, the second low-temperature radiator 3 is connected to the nine-way valve 5 through a second branch 102 and a third branch 103, and the second branch 102 and the third branch 103 are connected in parallel, the water-cooled intercooler 6 is connected to the nine-way valve 5 through a fourth branch 104, and the motor assembly is connected to the nine-way valve 5 through a fifth branch 105. The nine-way valve 5 controls the connection or interruption of each of the first branch 101, the second branch 102, the third branch 103, the fourth branch 104, and the fifth branch 105, and the connection or interruption between the first branch 101, the second branch 102, the third branch 103, and the fourth branch 104 and the fifth branch 105. By controlling the connection or interruption of each of the above five branches and the connection or interruption between the branches through the nine-way valve 5, the cooling mode can be flexibly adjusted under different vehicle operating conditions. Not only can the high temperature of the motor cooling liquid of the plug-in hybrid vehicle be effectively solved, but also the working temperature of the battery in the pure electric mode can be ensured, and the oil consumption of the engine in the hybrid mode can be reduced. At the same time, the two low-temperature radiators are arranged in parallel, which can provide higher fault tolerance for the vehicle cooling system in the present application, avoid the complete failure of the low-temperature heat dissipation circuit caused by the failure of a single low-temperature radiator or one or more low-temperature radiators in series, and be beneficial to the safe and stable operation of the vehicle cooling system.

[0054] As a preferred embodiment of the present application, the fifth branch (105) comprises at least one sub-branch, and a plurality of sub-branches are connected in parallel. Preferably, a proportional three-way valve for adjusting the flow ratio of each sub-branch is arranged on the fifth branch (105). This arrangement facilitates the flexible connection of the fifth branch (105) with each component in the motor assembly and the distribution of the cooling liquid flow between each sub-branch, which is beneficial to improving the cooling effect and efficiency of each component in the motor assembly.

[0055] Specifically, referring to Figures 1-8As shown, the aforementioned nine-way valve 5 includes nine ports: A, B, C, D, E, F, G, H, and L. The outlet of the first low-temperature radiator 1 is connected to port A of the nine-way valve 5 via the first branch 101, and the inlet of the first low-temperature radiator 1 is connected to port E of the nine-way valve 5 via the first branch 101. One outlet of the second low-temperature radiator 3 is connected to port C of the nine-way valve 5 via the second branch 102, and the other outlet is connected to port B of the nine-way valve 5 via the third branch 103. The inlet of the second low-temperature radiator 3 is connected to port D of the nine-way valve 5. The inlet of the water-cooled intercooler 6 is connected to the H port of the nine-way valve 5 via the fourth branch 104, and the outlet of the water-cooled intercooler 6 is connected to the G port of the nine-way valve 5 via the fourth branch 104. The inlet of the motor assembly is connected to the L port of the nine-way valve 5 via the fifth branch 105, and the outlet of the motor assembly is connected to the F port of the nine-way valve 5 via the fifth branch 105. By controlling the on / off state of the nine ports A, B, C, D, E, F, G, H, and L of the nine-way valve 5, the on / off state of each of the above branches and the connection or interruption between the branches can be achieved.

[0056] Continue to refer to Figure 1 , Figure 9 As shown, the second low-temperature radiator (3) has two flow paths of different lengths. The two flow paths share a common inlet and each has an outlet. The outlets of the two flow paths are connected to the nine-way valve (5) through the second branch (102) and the third branch (103), respectively. That is, the second low-temperature radiator 3 in this application adopts a U-shaped flow structure. This structure can extend the flow path of the coolant inside the second low-temperature radiator 3, thereby improving the heat dissipation and cooling effect of the coolant. It can achieve secondary circulation of the coolant to cool the motor when the motor coolant temperature is high, thereby improving the motor cooling efficiency and cooling effect, so as to ensure that the motor operating temperature is within the optimal temperature range and ensure the safe and stable operation of the motor. It should be noted that the U-shaped flow structure of the second low-temperature radiator 3 is only a preferred example of the solution in this application. Other structures such as "one inlet and three outlets" or "multiple inlets and multiple outlets" can also be used. This application does not make specific limitations on this. Similarly, this application does not make specific limitations on the structure of the first low-temperature radiator 1.

[0057] For more specific details, please refer to [link / reference]. Figure 1As shown, the fifth branch 105 in the application includes a first sub-branch 1051 and a second sub-branch 1052 in parallel, and the motor assembly in the application includes the P2 motor controller 72, the P2 motor 8 and the transmission oil cooler 9 connected in series in the first sub-branch 1051, and the intelligent driving controller 20, the converter and the on-board charger 10, the P4 motor controller 11, the P4 motor 12 and the rear axle reduction oil cooler connected in series in the second sub-branch 1052. In the state of low power operation of the motor and low temperature of the motor cooling liquid, the self-circulation of the fifth branch 105 through the transmission oil cooler 9 and the rear axle reduction oil cooler can meet the cooling and heat dissipation requirements of the motor. It should be noted that the composition of the motor assembly in the application is not limited to the above example, and it can also be adjusted according to the actual needs of the vehicle, and the sub-branch setting of the fifth branch 105 can also be adjusted according to the adjustment of the motor assembly, and the application does not make specific limitation on this.

[0058] Continuing to refer to Figure 1 As shown, the vehicle cooling system in the application is also provided with an overflow tank 15 connected to the second low-temperature radiator 33 through a throttle valve 21. By providing the overflow tank 15, the gas can be released and the pressure can be reduced when the cooling liquid is overheated, so as to avoid damage to the vehicle cooling system caused by overheating and boiling of the cooling liquid, and to ensure safe and stable operation of the vehicle cooling system.

[0059] As a preferred embodiment of the application, in the actual application process, referring to Figure 2 As shown, the second branch 102 and the fourth branch 104 communicate through the nine-way valve 5 to form the first intercooler cooling circuit, referring to Figure 3 As shown, the first branch 101 and the fourth branch 104 communicate through the nine-way valve 5 to form the second intercooler cooling circuit, referring to Figure 4 As shown, the fourth branch 104 forms an intercooler self-circulation circuit through the nine-way valve 5, referring to Figure 5 As shown, the third branch 103 and the fifth branch 105 communicate through the nine-way valve 5 to form the first motor cooling circuit, referring to Figure 6 As shown, the second branch 102 and the third branch 103 and the fifth branch 105 communicate through the nine-way valve 5 to form the second motor cooling circuit, referring to Figure 7 As shown, the first branch 101 and the fifth branch 105 communicate through the nine-way valve 5 to form the third motor cooling circuit, referring to Figure 8 As shown, the fifth branch 105 forms a motor self-circulation circuit through the nine-way valve 5.

[0060] In the above scheme, the on-off control of the multiple intercooling circuits and the multiple motor cooling circuits is realized by the nine-way valve 5, compared with the existing circuit control mode using multiple three-way valves and four-way valves, the valve setting is reduced, which is conducive to simplifying the circuit structure and better adapting to the limited installation space in the vehicle cabin, optimizing the pipeline layout, thereby improving the cooling circulation efficiency to further improve the cooling efficiency and cooling effect.

[0061] Further, the water pump assembly is connected with the first branch 101, the second branch 102, the third branch 103 and the fifth branch 105, and the temperature detection member 14 is arranged on the fifth branch 105 and used for detecting the temperature of the cooling liquid flowing into the motor assembly. Preferably, as shown in Figure 1 The water pump assembly includes the second electronic water pump 18 arranged on the first branch 101 and connected with the first low-temperature radiator 1 in series, the first electronic water pump 16 arranged on the second branch 102 and the third branch 103 and connected with the second low-temperature radiator 3 upstream in series, and the third electronic water pump 19 arranged on the fifth branch 105 and connected with the motor assembly in series. It should be noted that the composition of the water pump assembly and the arrangement mode of each water pump are not limited in the present application, and three backup water pumps can be connected in parallel on the basis of the above arrangement mode of the water pump assembly to improve the risk resistance of the cooling circuit, or other more different setting modes can be used, which are not limited in the present application.

[0062] In the above scheme, the water pump assembly is arranged to ensure the flow efficiency of the cooling liquid in each cooling circuit, thereby ensuring the cooling efficiency and cooling effect, and the temperature detection member 14 is arranged to accurately grasp the temperature of the cooling liquid flowing to the motor in real time, thereby facilitating the control of the on-off of each interface of the nine-way valve 5 according to the temperature of the cooling liquid to control the on-off of each cooling circuit, and further realizing the accurate and efficient control of the cooling system.

[0063] The different working modes of the vehicle cooling system in the pure electric mode and the hybrid mode in the present application will be described below.

[0064] Embodiment one: pure electric mode

[0065] When the vehicle is in the pure electric mode, i.e., the engine does not participate in the work, the water-cooled intercooler 6 as a matched part of the engine turbocharging also does not participate in the work, so the water-cooled intercooler 6 has no or low heat dissipation demand at this time, and therefore the first low-temperature radiator 1 and the second low-temperature radiator 3 usually do not participate in the heat dissipation work of the water-cooled intercooler 6 under this working condition. The different working modes of the vehicle cooling system in the pure electric mode will be further described below through several embodiments:

[0066] Embodiment 1: The vehicle is in a low-power state, the temperature T measured by the temperature detection member 14 is less than T1, and the heat dissipation requirement of the motor assembly is also low. In this working condition, the first low-temperature radiator 1 and the second low-temperature radiator 3 do not participate in the heat dissipation of the motor assembly, the nine-way valve 5 adopts the first communication mode, the intercooler self-circulation loop is communicated, and the motor self-circulation loop is communicated.

[0067] At this time, the cooling liquid flows in the first branch 101, the second branch 102, the third branch 103, the fourth branch 104, and the fifth branch 105 respectively. The specific flow path includes:

[0068] H port of the nine-way valve 5→water-cooled intercooler 6→G port of the nine-way valve 5→H port of the nine-way valve 5;

[0069] L port of the nine-way valve 5→third electronic water pump 19→low-temperature temperature sensor→(P2 motor controller 72→P2 motor 8→transmission oil cooler 9) in parallel with (intelligent driving controller 20→converter and on-board charger 10→P4 motor controller 11→P4 motor 12→transmission oil cooler 9)→F port of the nine-way valve 5→L port of the nine-way valve 5.

[0070] The above communication mode can effectively adapt to the heat dissipation requirement of the plug-in hybrid vehicle in the low-power state in the pure electric mode, can guarantee the working temperature of the motor during operation, can reduce the heat dissipation power consumption, is conducive to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0071] Embodiment 2: The vehicle is in a medium-high power state, the temperature T measured by the temperature detection member 14 is T1<T<T2, and the heat dissipation requirement of the motor assembly is improved. In this working condition, only the second low-temperature radiator 3 participates in the heat dissipation of the motor assembly, the nine-way valve 5 adopts the second communication mode, the intercooler self-circulation loop is communicated, and the second motor cooling loop is communicated.

[0072] At this time, the specific flow path of the cooling liquid includes:

[0073] H port of the nine-way valve 5→water-cooled intercooler 6→G port of the nine-way valve 5→H port of the nine-way valve 5;

[0074] Second low-temperature radiator 3→B port of the nine-way valve 5 / C port of the nine-way valve 5→L port of the nine-way valve 5→third electronic water pump 19→low-temperature temperature sensor→(P2 motor controller 72→P2 motor 8→transmission oil cooler 9) in parallel with (intelligent driving controller 20→converter and on-board charger 10→P4 motor controller 11→P4 motor 12→transmission oil cooler 9)→F port of the nine-way valve 5→D port of the nine-way valve 5→first electronic water pump 16→second low-temperature radiator 3.

[0075] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power consumption state in the pure electric mode, can guarantee the working temperature during the operation of the motor, can reduce the heat dissipation power consumption, is beneficial to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0076] In the embodiment 3, the vehicle is in a high-power consumption state, the temperature T measured by the temperature detection member 14 is greater than T2, and the motor assembly has a high heat dissipation demand. In this working condition, the first low-temperature radiator 1 and the second low-temperature radiator 3 both participate in the heat dissipation work of the motor assembly, the nine-way valve 5 adopts the third communication mode, the intercooler self-circulation loop is communicated, the second motor cooling loop is communicated, and the third motor cooling loop is communicated.

[0077] The specific flow path of the cooling liquid at this time includes:

[0078] The H port of the nine-way valve 5→the water-cooled intercooler 6→the G port of the nine-way valve 5→the H port of the nine-way valve 5;

[0079] The second low-temperature radiator 3→the B port of the nine-way valve 5 / the C port of the nine-way valve 5→the L port of the nine-way valve 5→the third electronic water pump 19→the low-temperature temperature sensor→(the P2 motor controller 72→the P2 motor 8→the transmission oil cooler 9) in parallel (the intelligent driving controller 20→the converter and the on-board charger 10→the P4 motor controller 11→the P4 motor 12→the transmission oil cooler 9)→the F port of the nine-way valve 5→the D port of the nine-way valve 5→the first electronic water pump 16→the second low-temperature radiator 3;

[0080] The first low-temperature radiator 1→the A port of the nine-way valve 5→the L port of the nine-way valve 5→the third electronic water pump 19→the low-temperature temperature sensor→(the P2 motor controller 72→the P2 motor 8→the transmission oil cooler 9) in parallel (the intelligent driving controller 20→the converter and the on-board charger 10→the P4 motor controller 11→the P4 motor 12→the transmission oil cooler 9)→the F port of the nine-way valve 5→the E port of the nine-way valve 5→the second electronic water pump 18→the first low-temperature radiator 1.

[0081] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power consumption state in the pure electric mode, can guarantee the working temperature during the operation of the motor, can reduce the heat dissipation power consumption, is beneficial to improving the battery energy utilization rate, and prolongs the vehicle driving range.

[0082] Embodiment two: idling recharging state in hybrid mode

[0083] When the vehicle is in the hybrid mode and the engine is working to drive the motor to generate electricity for the battery, the water-cooled intercooler 6 and the motor assembly have high heat dissipation requirements, and the first low-temperature radiator 1 and the second low-temperature radiator 3 need to participate in the heat dissipation work of the water-cooled intercooler 6 and the motor assembly. The following examples further illustrate the different working modes of the vehicle cooling system when the vehicle is in the hybrid mode and the engine is working to drive the motor to generate electricity:

[0084] Example 4: The vehicle is slowly charging, the vehicle power consumption is low, the temperature detected by the temperature detection member 14 is T < T1, and the heat dissipation requirements of the motor assembly and the water-cooled intercooler 6 are low. In this working condition, the nine-way valve 5 adopts the fourth communication mode, the first intercooler cooling circuit is connected, the second intercooler cooling circuit is connected, and the motor self-circulation circuit is connected.

[0085] The specific flow path of the coolant at this time includes:

[0086] Second low-temperature radiator 3→C port of nine-way valve 5→H port of nine-way valve 5→Water-cooled intercooler 6→G port of nine-way valve 5→D port of nine-way valve 5→First electronic water pump 16→Second low-temperature radiator 3;

[0087] First low-temperature radiator 1→A port of nine-way valve 5→H port of nine-way valve 5→Water-cooled intercooler 6→G port of nine-way valve 5→E port of nine-way valve 5→Second electronic water pump 18→First low-temperature radiator 1;

[0088] L port of nine-way valve 5→Third electronic water pump 19→Low-temperature temperature sensor→(P2 motor controller 72→P2 motor 8→Transmission oil cooler 9) in parallel with (Intelligent driving controller 20→Converter and on-board charger 10→P4 motor controller 11→P4 motor 12→Transmission oil cooler 9)→F port of nine-way valve 5→L port of nine-way valve 5;

[0089] Second low-temperature radiator 3→B port of nine-way valve 5→H port of nine-way valve 5→Water-cooled intercooler 6→G port of nine-way valve 5→D port of nine-way valve 5→First electronic water pump 16→Second low-temperature radiator 3.

[0090] The above communication mode can effectively adapt to the heat dissipation requirements of the plug-in hybrid electric vehicle in the hybrid mode and the low-power state of the charging mode. On the one hand, it can meet the heat dissipation requirements of the water-cooled intercooler 6 when the engine is working to generate electricity, ensuring that the engine is in a good operating state to reduce hybrid fuel consumption. On the other hand, it can also meet the heat dissipation needs of the motor during the inverter power generation process, ensuring that the motor is in a good operating state and operating environment, thereby facilitating the safety of the motor and prolonging the service life of the motor.

[0091] Embodiment 5: the vehicle is in a high power consumption state, the temperature T1 < T < T3 measured by the temperature detection member 14, the water-cooled intercooler 6 and the motor assembly have increased heat dissipation requirements, in this working condition, the nine-way valve 5 adopts the fifth communication mode, the first intercooler cooling circuit is communicated, the second intercooler cooling circuit is communicated, and the first motor cooling circuit is communicated.

[0092] The specific flow path of the coolant at this time includes:

[0093] The second low-temperature radiator 3 → the C port of the nine-way valve 5 → the H port of the nine-way valve 5 → the water-cooled intercooler 6 → the G port of the nine-way valve 5 → the D port of the nine-way valve 5 → the first electronic water pump 16 → the second low-temperature radiator 3;

[0094] The first low-temperature radiator 1 → the A port of the nine-way valve 5 → the H port of the nine-way valve 5 → the water-cooled intercooler 6 → the G port of the nine-way valve 5 → the E port of the nine-way valve 5 → the second electronic water pump 18 → the first low-temperature radiator 1;

[0095] The second low-temperature radiator 3 → the B port of the nine-way valve 5 → the L port of the nine-way valve 5 → the third electronic water pump 19 → the low-temperature temperature sensor → (the P2 motor controller 72 → the P2 motor 8 → the transmission oil cooler 9) in parallel (the intelligent driving controller 20 → the converter and the on-board charger 10 → the P4 motor controller 11 → the P4 motor 12 → the transmission oil cooler 9) → the F port of the nine-way valve 5 → the D port of the nine-way valve 5 → the first electronic water pump 16 → the second low-temperature radiator 3.

[0096] In the above scheme, the above-mentioned communication mode can effectively adapt to the heat dissipation requirements of the plug-in hybrid vehicle in the hybrid stationary power supply mode under the medium and high power consumption state, on the one hand, the heat dissipation requirements of the water-cooled intercooler 6 when the engine participates in power generation can be met, the engine is ensured to be in a good operating state to reduce the hybrid fuel consumption, on the other hand, the heat dissipation requirements of the motor in the inverter power generation process can be met, the motor is ensured to be in a good operating state and operating environment, thereby being conducive to ensuring the use safety of the motor and prolonging the service life of the motor.

[0097] Embodiment 6: the vehicle is in a high power consumption state, the temperature T > T3 measured by the temperature detection member 14, the water-cooled intercooler 6 and the motor assembly have relatively high heat dissipation requirements, in this working condition, the nine-way valve 5 adopts the sixth communication mode, the first intercooler cooling circuit is communicated, the first motor cooling circuit is communicated, and the third motor cooling circuit is communicated.

[0098] The specific flow path of the coolant at this time includes:

[0099] The second low-temperature radiator 3 → the C port of the nine-way valve 5 → the H port of the nine-way valve 5 → the water-cooled intercooler 6 → the G port of the nine-way valve 5 → the D port of the nine-way valve 5 → the first electronic water pump 16 → the second low-temperature radiator 3;

[0100] Second low-temperature radiator 3→ B port of nine-way valve 5→ L port of nine-way valve 5→ third electronic water pump 19→ low-temperature temperature sensor→ (P2 motor controller 72→ P2 motor 8→ transmission oil cooler 9) in parallel (intelligent driving controller 20→ converter and on-board charger 10→ P4 motor controller 11→ P4 motor 12→ transmission oil cooler 9)→ F port of nine-way valve 5→ D port of nine-way valve 5→ first electronic water pump 16→ second low-temperature radiator 3;

[0101] First low-temperature radiator 1→ A port of nine-way valve 5→ L port of nine-way valve 5→ third electronic water pump 19→ low-temperature temperature sensor→ (P2 motor controller 72→ P2 motor 8→ transmission oil cooler 9) in parallel (intelligent driving controller 20→ converter and on-board charger 10→ P4 motor controller 11→ P4 motor 12→ transmission oil cooler 9)→ F port of nine-way valve 5→ E port of nine-way valve 5→ second electronic water pump 18→ first low-temperature radiator 1.

[0102] The above communication mode can effectively adapt to the heat dissipation demand of the plug-in hybrid vehicle in the high-power state of the hybrid on-site rapid power supply mode. On the one hand, it can meet the heat dissipation demand of the water-cooled intercooler 6 when the engine participates in power generation, so as to ensure that the engine is in a good operating state to reduce hybrid fuel consumption. On the other hand, it can also meet the heat dissipation needs of the motor during the inverter power generation process, so as to ensure that the motor is in a good operating state and operating environment, thereby being conducive to ensuring the safety of the motor and prolonging the service life of the motor.

[0103] Embodiment three: non-on-site power supply state in hybrid mode

[0104] When driving normally in the hybrid mode, the engine and the motor both participate in driving work. At this time, the heat dissipation demand of the water-cooled intercooler 6 and the motor assembly is greatly improved, and the first low-temperature radiator 1 and the second low-temperature radiator 3 need to participate in the heat dissipation work of the water-cooled intercooler 6 and the motor assembly. However, at this time, the motor only participates in auxiliary driving work, and the heat dissipation demand of the water-cooled intercooler 6 is higher than that of the motor assembly. Therefore, in this working condition, the nine-way valve 5 also adopts the fifth communication mode, that is, the first intercooler cooling circuit is communicated, the second intercooler cooling circuit is communicated, and the first motor cooling circuit is communicated. The specific cooling liquid flow path at this time is referred to the specific cooling liquid flow path in Embodiment 5, which is not described here.

[0105] It should be noted that T1, T2 and T3 above are respectively the first preset temperature, the second preset temperature and the third preset temperature, and the first preset temperature, the second preset temperature and the third preset temperature can be calibrated according to specific conditions, which are not limited here.

[0106] It should be noted that the working modes of the vehicle cooling system disclosed in the above seven embodiments are only preferred examples of the present application, and the vehicle cooling system can be further optimized by using other different working modes, and the present application does not make specific limitations on this.

[0107] Another purpose of the present application is to provide a vehicle provided with the vehicle cooling system as described above. With continuous reference to Figure 1 As a preferred embodiment of the present application, the second low-temperature radiator 3 is arranged between the condenser 2 and the high-temperature radiator 4, and the first low-temperature radiator 1 is arranged on the side of the condenser 2 away from the high-temperature radiator 4 and close to one end of the condenser 2. Generally, the low-temperature cooling circuit requires a lower temperature of the coolant, so the low-temperature radiator in the vehicle cooling system needs to be arranged at the front end of the entire cooling module of the vehicle thermal management system to avoid the influence of other heat exchange components on the performance of the low-temperature radiator. That is, along the front-rear direction of the vehicle, the low-temperature radiator is in front, the intercooler is in the middle, and the high-temperature radiator 4 is in the rear. At the same time, in order to avoid the influence of the low-temperature radiator on the subcooling of the lower part of the condenser 2 and affect the condensing effect, it is generally required that the frontal area of the low-temperature radiator cannot be greater than that of the condenser 2. In this way, the area of the low-temperature radiator is small, the heat dissipation area is limited, and the cooling effect of the low-temperature radiator is limited. The above arrangement avoids the shielding of the first low-temperature radiator 1 to the condenser 2, thereby ensuring the cooling effect of the first low-temperature radiator 1 and the condenser 2. It should be noted that the arrangement of the first low-temperature radiator 1 and the second low-temperature radiator 3 in the present application is not limited to the above example, and the above example is only a preferred example in the present application, and the present application does not make specific limitations on this.

[0108] In addition, since the vehicle includes the above vehicle cooling system, it also has the beneficial effects of the above vehicle cooling system. The vehicle provided in the embodiments of the present application includes the structures of the vehicle cooling system in any of the above embodiments, and to avoid repetition, details are not repeated here.

[0109] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0110] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments. The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A vehicle cooling system characterized by, The water pump assembly comprises a first low-temperature radiator (1), a second low-temperature radiator (3) and a water-cooled intercooler (6) and a motor assembly connected in parallel with a nine-way valve (5), the first low-temperature radiator (1) is connected with the nine-way valve (5) through a first branch (101), the second low-temperature radiator (3) is connected with the nine-way valve (5) through a second branch (102) and a third branch (103), the water-cooled intercooler (6) is connected with the nine-way valve (5) through a fourth branch (104), and the motor assembly is connected with the nine-way valve (5) through a fifth branch (105).

2. The vehicle cooling system of claim 1, wherein, The second low-temperature radiator (3) is provided with two flow paths with different lengths, the two flow paths share one inlet and are respectively provided with one outlet, and the outlets of the two flow paths are connected with the nine-way valve (5) through the second branch (102) and the third branch (103) respectively.

3. The vehicle cooling system of claim 2, wherein The second branch (102) and the fourth branch (104) are communicated through the nine-way valve (5) to form a first intercooler cooling circuit, the first branch (101) and the fourth branch (104) are communicated through the nine-way valve (5) to form a second intercooler cooling circuit, the third branch (103) and the fifth branch (105) are communicated through the nine-way valve (5) to form a first motor cooling circuit, the second branch (102) and the fifth branch (105) are communicated through the nine-way valve (5) to form a second motor cooling circuit, the first branch (101) and the fifth branch (105) are communicated through the nine-way valve (5) to form a third motor cooling circuit, the fourth branch (104) forms an intercooler self-circulation circuit through the nine-way valve (5), and the fifth branch (105) forms a motor self-circulation circuit through the nine-way valve (5).

4. The vehicle cooling system of claim 3, wherein In the first communication mode of the nine-way valve (5), the intercooler self-circulation circuit is communicated, and the motor self-circulation circuit is communicated. In the second communication mode of the nine-way valve (5), the intercooler self-circulation circuit is communicated, and the second motor cooling circuit is communicated. In the third communication mode of the nine-way valve (5), the intercooler self-circulation circuit is communicated, the second motor cooling circuit is communicated, and the third motor cooling circuit is communicated. In the fourth communication mode of the nine-way valve (5), the first intercooler cooling circuit is communicated, the second intercooler cooling circuit is communicated, and the motor self-circulation circuit is communicated. In the fifth communication mode of the nine-way valve (5), the first intercooler cooling circuit is communicated, the second intercooler cooling circuit is communicated, and the first motor cooling circuit is communicated. In the sixth communication mode of the nine-way valve (5), the first intercooler cooling circuit is communicated, the first motor cooling circuit is communicated, and the third motor cooling circuit is communicated.

5. The vehicle cooling system of claim 3, wherein Also included is a water pump assembly ， The water pump assembly includes at least a second electronic water pump (18) disposed in the first branch (101) and a third electronic water pump (19) disposed in the fifth branch (105).

6. The vehicle cooling system of claim 5, wherein The water pump assembly further comprises a first electronic water pump (16) arranged upstream of the second low-temperature radiator (3).

7. The vehicle cooling system of claim 1, wherein The fifth branch (105) comprises at least one branch, and the multiple branches are connected in parallel with each other.

8. The vehicle cooling system of claim 7, wherein, A proportional three-way valve is arranged on the fifth branch (105) for adjusting the flow ratio of each branch.

9. The vehicle cooling system of claim 1, wherein, A temperature detecting member (14) is further included, which is arranged on the fifth branch (105) for detecting the temperature of the cooling liquid flowing into the motor assembly.

10. A vehicle characterized by comprising: The vehicle cooling system according to any one of claims 1-9 is arranged in the vehicle.

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