Cooling system of vehicle and cooling method of vehicle

Abstract

The invention discloses a vehicle cooling system and a vehicle cooling method, and relates to the technical field of vehicle thermal management. The cooling system of the vehicle comprises a power battery cooling loop, a motor controller cooling loop, a compressor loop and a multi-way valve, when the multi-way valve is in a first communication state, the power battery cooling loop cools a power battery through the compressor loop, and the motor controller cooling loop cools a motor controller through a radiator; when the multi-way valve is in a second communication state, the power battery and the motor controller are cooled through the cooling medium output by the radiator; and when the multi-way valve is in the third communication state, the power battery cooling loop cools the power battery through the compressor loop, and the motor controller cooling loop cools the motor controller through the radiator and the compressor loop. The technical problems that a cooling system is complex in structure and high in cooling cost are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle thermal management, and in particular to a vehicle cooling system and a vehicle cooling method. Background Art

[0002] At present, when cooling the power battery of a vehicle, the power battery is usually cooled by compressed medium cooling in summer, and the power battery is usually cooled by a separately installed radiator or a compressor in winter. Moreover, the cooling of the power battery and the cooling of the motor controller in the vehicle are independent of each other, and there are technical problems such as complex structure of the vehicle's cooling system and high cooling cost.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a cooling system for a vehicle and a cooling method for a vehicle, so as to at least solve the technical problems of complex cooling structure and high cooling cost of the vehicle.

[0005] According to one aspect of an embodiment of the present invention, a cooling system of a vehicle is provided. The cooling system of the vehicle comprises: a power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve, wherein the multi-way valve is arranged between the power battery cooling circuit and the motor controller cooling circuit, wherein when the multi-way valve is in a first connection state, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit; and / or, when the multi-way valve is in a second connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator; and / or, when the multi-way valve is in a third connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

[0006] Optionally, a three-way valve, wherein a first port of the three-way valve is connected to a fluid outlet of a power battery cooling circuit, a second port of the three-way valve is connected to a fluid inlet of a power battery cooling circuit, and a third port of the three-way valve is connected to a fluid inlet of a motor controller cooling circuit; a first connectivity state is used to indicate that the first port is connected to the second port, and the third port is not connected; a second connectivity state is used to indicate that the first port is connected to the third port, and the second port is not connected; and a third connectivity state is used to indicate that the first port is connected to the second port and the third port, respectively.

[0007] Optionally, the vehicle's cooling system also includes: a first temperature sensor, arranged at the fluid outlet of the power battery cooling circuit, for detecting the temperature of the cooling medium flowing through the power battery; a second temperature sensor, arranged at the fluid outlet of the motor controller cooling circuit, for detecting the temperature of the cooling medium flowing through the motor controller; a third temperature sensor, arranged at the outlet of the radiator in the motor controller cooling circuit, for detecting the temperature of the cooling medium output by the radiator.

[0008] Optionally, the vehicle's cooling system also includes: a battery water pump, which is arranged on the power battery cooling circuit and connected to the fluid inlet of the power battery, and is used to control the flow rate of the cooling medium flowing into the power battery; a motor water pump, which is arranged on the motor controller cooling circuit and connected to the fluid inlet of the motor controller, and is used to control the flow rate of the cooling medium flowing into the motor controller; a cooling fan, which is arranged on the cooling circuit of the motor controller and connected to the radiator, and is used to control the temperature of the cooling medium output by the radiator.

[0009] Optionally, the cooling medium output by the compressor circuit flows into the power battery cooling circuit and / or the motor controller cooling circuit through a plate heat exchanger.

[0010] Optionally, the cooling system of the vehicle includes a controller, which is used to detect a target temperature range of an ambient temperature of the vehicle and switch a connection state of the multi-way valve according to the target temperature range.

[0011] Optionally, the controller is also used to detect the target operating condition that the vehicle is currently in, and switch the connectivity state of the multi-way valve according to the target operating condition.

[0012] According to another aspect of an embodiment of the present invention, a vehicle cooling method is also provided, which is applied to a cooling system of a vehicle, wherein the cooling system of the vehicle includes a power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve. The vehicle cooling method includes: determining a target connection state of the multi-way valve based on the ambient temperature or target working condition of the vehicle; controlling the multi-way valve to connect according to the target connection state, wherein the target connection state is at least one of the following connection states: a first connection state, a second connection state and a third connection state, in the first connection state, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit, in the second connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator, and in the third connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

[0013] Optionally, based on the ambient temperature or the target operating condition, the target connectivity state of the multi-way valve is determined, including: detecting the target temperature range of the ambient temperature of the vehicle; determining a preset connectivity state corresponding to the target temperature range as the target connectivity state; or, detecting the target operating condition of the vehicle; determining a preset connectivity state corresponding to the target operating condition as the target connectivity state.

[0014] Optionally, the vehicle cooling method also includes: in response to the target connectivity state of the multi-way valve being the first connectivity state and the temperature of the motor controller being greater than a temperature threshold within a preset time period, switching the target connectivity state of the multi-way valve from the first connectivity state to a third connectivity state.

[0015] Optionally, the vehicle cooling method further includes: in response to the multi-way valve being in a third connected state, controlling the cooling medium output by the compressor circuit to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion.

[0016] Optionally, the vehicle cooling method also includes: in response to the temperature of the cooling medium flowing through the power battery being greater than a first temperature threshold, increasing the rotation speed of the battery water pump, wherein the battery water pump is used to control the flow rate of the cooling medium flowing into the power battery; or, in response to the temperature of the cooling medium flowing through the motor controller being greater than a second temperature threshold, increasing the rotation speed of the motor water pump, wherein the motor water pump is used to control the flow rate of the cooling medium flowing into the motor controller; or, in response to the temperature of the cooling medium output by the radiator being greater than a third temperature threshold, increasing the rotation speed of the cooling fan, wherein the cooling fan is used to control the temperature of the cooling medium output by the radiator.

[0017] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the method in each embodiment of the present invention is executed when the program is running.

[0018] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0019] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0020] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0021] According to another aspect of the embodiments of the present invention, a computer program is further provided. When the computer program is executed by a processor, the methods in the embodiments of the present invention are implemented.

[0022] In an embodiment of the present invention, a cooling system of a vehicle is provided, comprising: a power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve, wherein the multi-way valve is arranged between the power battery cooling circuit and the motor controller cooling circuit, and the multi-way valve corresponds to different connection states. By adjusting the connection state of the multi-way valve, the power battery and the motor controller in the vehicle can be cooled in different modes, wherein when the multi-way valve is in a first connection state, the power battery and the motor controller of the vehicle are independent of each other, that is, the power battery cooling circuit cools the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit cools the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit. When the multi-way valve is in a second connection state, the power battery and the motor controller of the vehicle share the radiator in the motor controller cooling circuit, that is, the power battery and the motor controller are both cooled by the cooling medium output by the radiator. When the multi-way valve is in the third connectivity state, the cooling medium output by the compressor flows into the power battery and the motor controller at the same time, thereby cooling the power battery and the motor controller. That is, by adjusting the connectivity state of the multi-way valve in the vehicle's cooling system, the cooling method of the power battery and the motor controller can be flexibly controlled. There is no need to design a radiator separately for the power battery, which simplifies the structure of the vehicle's cooling system, saves cooling costs, and improves the thermal management efficiency in the vehicle's cooling system, thereby solving the technical problems of the vehicle's cooling system structural load and high cooling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 is a schematic diagram of a cooling system for a vehicle according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a cooling system for a vehicle according to another embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of another cooling system for a vehicle according to an embodiment of the present invention;

[0027] Figure 4 is a flow chart of a vehicle cooling method according to an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a cooling device for a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Example 1

[0032] According to an embodiment of the present invention, a cooling system for a vehicle is provided. Figure 1 is a schematic diagram of a cooling system for a vehicle according to an embodiment of the present invention, such as Figure 1 As shown, the cooling system 100 of the vehicle includes: a power battery cooling circuit 101, a motor controller cooling circuit 102, a compressor circuit 103 and a multi-way valve 104, wherein the multi-way valve 104 is arranged between the power battery cooling circuit and the motor controller cooling circuit, and the multi-way valve 104 corresponds to a plurality of different connection states.

[0033] When the multi-way valve 104 is in the first connected state, the power battery cooling circuit 101 is used to cool the power battery 1011 in the vehicle through the cooling medium output by the compressor circuit 103, and the motor controller cooling circuit 102 is used to cool the motor controller 1021 in the vehicle through the radiator 1022 in the motor controller cooling circuit.

[0034] When the multi-way valve 104 is in the second connected state, the power battery cooling circuit 101 is used to cool the power battery through the cooling medium output by the radiator 1022 , and the motor controller cooling circuit 102 is used to cool the motor controller 1021 through the cooling medium output by the radiator 1022 .

[0035] When the multi-way valve 104 is in the third connection state, the power battery cooling system 101 is used to cool the power battery 1011 through the cooling medium output by the compressor circuit 103, and the motor controller cooling circuit 102 is used to cool the motor controller 1021 through the cooling medium output by the radiator 1022 and the cooling medium output by the compressor circuit 103.

[0036] like Figure 1 As shown, the power battery cooling circuit 101 at least includes: a power battery 1011 and a plate heat exchanger 1012. The motor controller cooling circuit 102 at least includes: a motor controller 1021 and a radiator 1022. The compressor circuit 103 at least includes: a compressor 1031, a condenser 1032 and an expansion valve 1033.

[0037] Optionally, the multi-way valve 104 may be a three-way valve, which is only an example and does not limit the specific type of the multi-way valve. The three-way valve includes three ports, namely: a first port 1041, a second port 1042 and a third port 1043. Figure 1 As shown, the first port 1041 of the three-way valve is connected to the fluid outlet of the power battery cooling circuit 101, the second port 1042 of the three-way valve is connected to the flow inlet of the power battery cooling circuit 101, and the third port 1043 of the three-way valve is connected to the fluid inlet of the motor controller cooling circuit 102.

[0038] Optionally, the three-way valve may correspond to three different connection states, such as Figure 1 As shown, when the three-way valve is in the first communication state, the first port 1041 of the three-way valve is communicated with the second port 1042, and the third port 1043 of the three-way valve is not communicated. When the three-way valve is in the second communication state, the first port 1041 of the three-way valve is communicated with the third port 1043, and the second port 1042 of the three-way valve is not communicated. When the three-way valve is in the third communication state, the first port 1041 of the three-way valve is communicated with the second port 1042 and the third port 1043, respectively.

[0039] Optionally, when the three-way valve is in the first connected state, the power battery cooling circuit 101 and the motor controller cooling circuit 102 operate independently. The power battery cooling circuit 101 cools the power battery 1011 in the vehicle by means of the cooling medium output by the compressor circuit 103. For example, in the compressor circuit 103, the cooling medium discharged by the compressor 1031 is throttled into a low-temperature cooling medium by the expansion valve 1033 after the cooling is dissipated by the condenser 1032. The low-temperature cooling medium cools the cooling medium used for cooling the power battery in the plate heat exchanger 1012, and the cooled cooling medium flows into the power battery 1011 to cool the power battery.

[0040] The motor controller cooling circuit 102 is cooled by the cooling medium after being cooled by the radiator 1022 , that is, the high-temperature cooling medium is cooled by the radiator 1011 and then flows into the motor controller 1021 to cool the motor controller.

[0041] Optionally, when the three-way valve is in the second connected state, the power battery cooling circuit 101 and the motor controller cooling circuit 102 are connected to each other, and the power battery cooling circuit 101 and the motor controller cooling circuit 102 share the radiator 1022 in the motor controller cooling circuit. That is, the power battery cooling circuit 101 cools the power battery 1011 through the cooling medium output by the radiator 1022 in the motor controller 102. The motor controller 102 also cools the motor controller 1021 through the cooling medium output by the radiator 1022 in the motor controller 102.

[0042] Optionally, when the three-way valve is in the third connected state, the power battery cooling circuit 101 and the motor controller cooling circuit 102 are both connected to the compressor circuit 103. In this state, the cooling medium output by the compressor circuit 103 can flow into the power battery cooling circuit 101 through the plate heat exchanger 1012 to cool the power battery 1011, and the cooling medium output by the compressor circuit 103 can also flow into the motor controller cooling circuit 102 through the plate heat exchanger 1012 to cool the motor controller 1021. Among them, the motor controller 1021 can also be cooled by the radiator 1022 in the motor controller circuit 102.

[0043] Optionally, in summer, the three-way valve 104 in the vehicle's cooling system can be controlled to be in the first connection state, so that the power battery cooling circuit 101 and the motor controller cooling circuit operate independently. In winter, the three-way valve 104 in the vehicle's cooling system can be controlled to be in the second connection state, so that the power battery cooling circuit 101 and the motor controller cooling circuit are connected to each other and share a radiator, so as to avoid using the compressor to cool the power battery in winter and causing damage to the compressor.

[0044] Optionally, if in hot summer weather, when the three-way valve 104 is in the first connected state, the temperature of the vehicle's motor controller continues to be too high, in this case, the connected state of the three-way valve 104 can be switched from the first connected state to the third connected state, so that the compressor circuit 103 is connected to the motor controller circuit 102, so that the motor controller can be cooled not only by the radiator 1011, but also by the cooling medium output by the compressor circuit 103, so as to speed up the cooling efficiency of the motor controller.

[0045] Optionally, if the vehicle is currently operating in a steep climbing condition, the three-way valve 104 is in the first connected state, and the temperature of the vehicle's motor controller continues to be too high. In this case, the working state of the three-way valve 104 can also be switched from the first connected state to the third connected state, so that the motor controller is not only cooled by the radiator 1022, but also cooled by the cooling medium output by the compressor circuit 103.

[0046] Optionally, when the three-way valve is in the third connected state, since the cooling medium output by the compressor circuit must be input into the power battery cooling circuit to cool the power battery, and must also be input into the motor controller cooling circuit to cool the motor controller, in this case, the flow rate of the cooling medium output from the compressor circuit 103 can be controlled to be input into the power battery cooling circuit 101 and the motor controller cooling circuit 102 in the same proportion, that is, each accounting for 50% of the flow rate.

[0047] In the cooling system of the above-mentioned vehicle, by setting a multi-way valve between the power battery cooling circuit and the motor controller cooling circuit, and then adjusting the connection state of the multi-way valve, the cooling method of the power battery and the motor controller of the vehicle can be flexibly controlled. When the multi-way valve is in the first connection state, the power battery and the motor controller of the vehicle are independent of each other, that is, the power battery cooling circuit cools the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit cools the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit. When the multi-way valve is in the second connection state, the power battery and the motor controller of the vehicle share the radiator in the motor controller cooling circuit, that is, the power battery and the motor controller are both cooled by the cooling medium output by the radiator. When the multi-way valve is in the third connectivity state, the cooling medium output by the compressor flows into the power battery and the motor controller at the same time, thereby cooling the power battery and the motor controller. That is, by adjusting the connectivity state of the multi-way valve in the vehicle's cooling system, the cooling method of the power battery and the motor controller can be flexibly controlled. There is no need to design a radiator separately for the power battery, which simplifies the structure of the vehicle's cooling system, saves cooling costs, and improves the thermal management efficiency in the vehicle's cooling system, thereby solving the technical problems of the vehicle's cooling system structural load and high cooling costs.

[0048] As an optional implementation, the cooling system 100 of the vehicle further includes: a first temperature sensor 1013 , a second temperature sensor 1023 and a third temperature sensor 1024 .

[0049] Figure 2 is a schematic diagram of a cooling system for a vehicle according to another embodiment of the present invention. Figure 2As shown, the first temperature sensor 1013 is disposed at the fluid outlet of the power battery cooling circuit, and is used to detect the temperature of the cooling medium flowing through the power battery.

[0050] The second temperature sensor 1023 is disposed at the flow outlet of the motor controller cooling circuit and is used to detect the temperature of the cooling medium flowing through the motor controller.

[0051] The third temperature sensor 1024 is disposed at the outlet of the radiator in the cooling circuit of the motor controller, and is used to detect the temperature of the cooling medium output by the radiator.

[0052] In this embodiment, by deploying temperature sensors at different positions of the vehicle's cooling system, the temperature of the cooling medium at the corresponding position can be accurately detected, and based on the detected temperature of the cooling medium, it can be determined whether the power battery and the motor controller have reached the cooling target.

[0053] Optionally, if the temperature of the cooling medium flowing through the power battery detected by the first temperature sensor is greater than the target cooling temperature of the power battery, in this case, the flow rate of the cooling medium flowing into the power battery can be increased so that the cooling medium takes away more heat when flowing through the power battery. Similarly, if the temperature flowing through the motor controller detected by the second temperature sensor is greater than the target cooling temperature of the motor controller, in this case, the flow rate of the cooling medium flowing into the motor controller can be increased so that the cooling medium takes away more heat when flowing through the motor controller. Optionally, if the third temperature sensor detects that the temperature of the cooling medium output by the radiator is greater than the target temperature, in this case, it means that the temperature of the cooling medium output by the radiator is too high and does not meet the cooling requirements for vehicle components. In this case, the temperature of the cooling medium output by the radiator can be adjusted so that the temperature of the cooling medium output by the radiator meets the cooling requirements for vehicle components.

[0054] As an optional implementation, the cooling system 100 of the vehicle further includes: a battery water pump 1014 , a motor water pump 1025 and a cooling fan 1026 .

[0055] Figure 3 is a schematic diagram of another cooling system for a vehicle according to an embodiment of the present invention. Figure 3 As shown, the battery water pump 1014 is arranged on the power battery cooling circuit and connected to the fluid inlet of the power battery to control the flow rate of the cooling medium flowing into the power battery.

[0056] The motor water pump 1025 is disposed on the cooling circuit of the motor controller and connected to the fluid inlet of the motor controller to control the flow rate of the cooling medium flowing into the motor controller.

[0057] The cooling fan 1026 is arranged on the cooling circuit of the motor controller and connected to the radiator to control the temperature of the cooling medium output by the radiator.

[0058] In this embodiment, the battery water pump 1014 is connected to the power battery 1011. When the first temperature sensor 1013 detects that the temperature of the cooling medium flowing through the power battery in the power battery cooling circuit is greater than the target cooling temperature of the power battery, it means that the current flow rate of the cooling medium flowing into the power battery is insufficient to cool the power battery. In this case, the battery water pump 1014 can be controlled to increase the speed to increase the flow rate of the cooling medium flowing into the power battery.

[0059] Optionally, the motor water pump 1025 is connected to the motor controller 1021. When the second temperature sensor 1023 detects that the temperature of the cooling medium flowing through the motor controller in the cooling circuit of the motor controller is greater than the target cooling temperature of the motor controller, it means that the current flow rate of the cooling medium flowing into the motor controller is insufficient to cool the motor controller. In this case, the speed of the motor water pump 1025 can be controlled to increase to increase the flow rate of the cooling medium flowing into the motor controller.

[0060] Optionally, the cooling fan 1026 is connected to the radiator 1022. When the third temperature sensor 1024 detects that the temperature of the cooling medium flowing out of the radiator is greater than the target temperature, it means that the temperature of the cooling medium after the radiator dissipates heat is too high. In this case, if the cooling medium output by the radiator is directly used to cool the vehicle's power battery and / or motor controller, the cooling effect will be poor. Therefore, the cooling fan 1026 can be controlled to increase the speed to accelerate the cooling rate of the cooling medium in the radiator and reduce the temperature of the cooling medium output by the radiator.

[0061] In the cooling system of the vehicle, the flow rate of the cooling medium flowing into the power battery can be adjusted by the battery water pump so that the cooling medium flowing into the power battery meets the cooling requirements of the power battery. The flow rate of the cooling medium flowing into the motor controller can be adjusted by the motor water pump so that the cooling medium flowing into the motor controller meets the cooling requirements of the motor controller. The temperature of the cooling medium output from the radiator can be adjusted by the cooling fan so that the temperature of the cooling medium output from the radiator meets the cooling requirements of the power battery and / or the motor controller.

[0062] As an optional implementation, the cooling medium output by the compressor circuit flows into the power battery cooling circuit and / or the motor controller cooling circuit through the plate heat exchanger.

[0063] In this embodiment, as can be seen from the above introduction, the cooling medium output by the compressor circuit can be exchanged into the power battery cooling circuit and / or the motor controller cooling circuit through the plate heat exchanger 1012 .

[0064] For example, when the multi-way valve is in the first connection state, the cooling medium output by the compressor circuit can be input into the power battery cooling circuit through the plate heat exchanger to cool the power battery. When the multi-way valve is in the third connection state, the cooling medium output by the compressor circuit can be input into the power battery cooling circuit and the motor controller cooling circuit through the plate heat exchanger to cool the power battery and the motor controller.

[0065] As an optional implementation, the cooling system of the vehicle includes a controller, which is used to detect a target temperature range of an ambient temperature of the vehicle and switch a connection state of the multi-way valve according to the target temperature range.

[0066] In this embodiment, when the controller detects that the ambient temperature of the vehicle is in the first temperature range, the connection state of the multi-way valve is determined to be the first connection state; when the controller detects that the ambient temperature of the vehicle is in the second temperature range, the connection state of the multi-way valve is determined to be the second connection state. The first temperature range can be used to indicate the temperature range corresponding to summer, and the second temperature range can be the same as the temperature range corresponding to winter, that is, the temperature value in the first temperature range is greater than the temperature value in the second temperature range.

[0067] Optionally, after determining the connectivity state of the multi-way valve according to the ambient temperature of the vehicle, the multi-way valve can be controlled to switch from the current connectivity state to the determined connectivity state to better cool the power battery and motor controller of the vehicle.

[0068] As an optional implementation, the controller in the cooling system of the vehicle is also used to detect the target operating condition of the vehicle and switch the connectivity state of the multi-way valve according to the target operating condition.

[0069] In this embodiment, there may be a corresponding mapping relationship between the operating condition of the vehicle and the connectivity state of the multi-way valve. Based on this, when the controller in the vehicle's cooling system detects the target operating condition currently in which the vehicle is located, the connectivity state of the multi-way valve may be determined as the connectivity state corresponding to the target operating condition.

[0070] For example, when the vehicle is currently in a steep climbing condition, it can be determined that the temperature of the motor controller is high. In this case, the cooling medium output by the compressor circuit can be used to cool the vehicle's motor controller, that is, the compressor circuit needs to be connected to the motor controller cooling circuit. In this case, the connectivity state of the multi-way valve can be determined to be the third connectivity state.

[0071] In the above steps, the connectivity state of the multi-way valve can be adjusted according to the current ambient temperature of the vehicle or the current target operating condition of the vehicle, so that the vehicle's power battery and motor controller can be cooled in an appropriate cooling mode, thereby improving the cooling efficiency of the vehicle's power battery and motor controller.

[0072] According to an embodiment of the present invention, a method embodiment of cooling a vehicle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0073] Figure 4 1 is a flow chart of a vehicle cooling method according to an embodiment of the present invention, the vehicle cooling method is applied to a vehicle cooling system, the vehicle cooling system includes a power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve. Figure 4 As shown, the method comprises the following steps:

[0074] Step S402: determining a target connection state of the multi-way valve based on the ambient temperature or target operating conditions of the vehicle.

[0075] In the technical solution provided in the above step S402 of the present application, the ambient temperature is used to indicate the temperature of the environment in which the vehicle is currently located. The target operating condition is used to indicate the type of operating condition currently performed by the vehicle, wherein the operating condition type can be preset, for example, a steep climbing condition, which is only an illustrative example and does not limit the operating condition type.

[0076] In this embodiment, there is a mapping relationship between the temperature range corresponding to the ambient temperature and the connection state of the multi-way valve, and there is a mapping relationship between the type of working condition executed by the vehicle and the connection state of the multi-way valve. Based on this, by detecting the current ambient temperature of the vehicle, the target connection state of the multi-way valve can be determined. The target connection state can be at least one of the following connection states: one of the first connection state, the second connection state and the third connection state, that is, the multi-way valve corresponds to at least these three connection states. When the target connectivity state is in the first connectivity state, the cooling mode corresponding to the power battery and the motor controller is that the power battery cooling circuit and the motor controller cooling circuit operate independently, the power battery cooling circuit cools the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit cools the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit; when the target connectivity state is in the second connectivity state, the cooling mode corresponding to the power battery and the motor controller is that the power battery cooling circuit cools the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit cools the motor controller through the cooling medium output by the radiator; when the target connectivity state is in the third connectivity state, the cooling mode corresponding to the power battery and the motor controller is that the power battery cooling circuit cools the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit cools the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

[0077] For example, when the current ambient temperature of the vehicle is within the first temperature range, the target connectivity state of the multi-way valve is determined to be the first connectivity state or the third connectivity state. For example, when the temperature of the motor controller is lower than the temperature threshold, the target connectivity state of the multi-way valve is determined to be the first connectivity state, and when the temperature of the motor controller is higher than the temperature threshold, the target connectivity state of the multi-way valve is determined to be the third connectivity state. When the current ambient temperature of the vehicle is within the second temperature range, the target connectivity state of the multi-way valve is determined to be the second connectivity state. The ambient temperature in the first temperature range is greater than the ambient temperature in the second temperature range, and the first temperature range may be a temperature range corresponding to summer, and the second temperature range may be a temperature range corresponding to winter.

[0078] Optionally, when the vehicle is currently operating in a steep climbing condition, due to the high temperature of the motor controller, in this case, the connectivity state of the multi-way valve can be controlled to be a third connectivity state, so that the cooling medium output by the radiator and the cooling medium output by the compressor circuit can be used together to cool the vehicle's motor controller.

[0079] In this step, the target connectivity state of the multi-way valve may be determined by the current ambient temperature of the vehicle or the target operating condition currently being executed by the vehicle. This method of determining the connectivity state of the multi-way valve is more flexible.

[0080] Step S404, controlling the multi-way valve to communicate according to the target communication state.

[0081] In the technical solution provided in the above step S404 of the present application, after the target connectivity state of the multi-way valve is determined through the above step S402, the multi-way valve can be connected according to the determined target connectivity state, so that the power battery cooling circuit cools the power battery according to the cooling mode corresponding to the target connectivity state, and the motor controller cooling circuit cools the motor controller according to the cooling mode corresponding to the target connectivity state.

[0082] In the above steps S402 to S404, the target connectivity state of the multi-way valve is first determined based on the ambient temperature of the vehicle or the target operating condition of the vehicle, and then the multi-way valve is controlled to be in the target connectivity state. When the multi-way valve is in the target connectivity state, the power battery cooling circuit is controlled to cool the power battery of the vehicle, and the motor controller cooling circuit is controlled to cool the motor controller of the vehicle according to the cooling mode corresponding to the target connectivity state. In this way, by adjusting the connectivity state of the multi-way valve, the cooling mode of the power battery and the motor controller can be flexibly controlled, which can improve the thermal management efficiency in the vehicle cooling system and save cooling costs, thereby solving the technical problems of the vehicle's cooling system structural load and high cooling costs.

[0083] Next, the cooling method of the vehicle will be further introduced.

[0084] As an optional implementation, step S402 determines the target connectivity state of the multi-way valve based on the ambient temperature or the target operating condition, including: detecting the target temperature range of the ambient temperature of the vehicle; determining a preset connectivity state corresponding to the target temperature range as the target connectivity state; or, detecting the target operating condition of the vehicle; determining a preset connectivity state corresponding to the target operating condition as the target connectivity state.

[0085] In this embodiment, the multi-way valve can be a three-way valve, which is only an illustrative example here and does not limit the specific type of the multi-way valve. The ambient temperature is used to indicate the temperature of the environment in which the vehicle is currently located, and the target temperature range is a preset ambient temperature reference value, wherein the target temperature range can be at least a first temperature range or a second temperature range, wherein the first temperature range can be the range of the ambient temperature corresponding to summer, and the second temperature range can be the range of the ambient temperature corresponding to winter. The connectivity state of the multi-way valve corresponding to different ambient temperature ranges is different, that is, there is a mapping relationship between the ambient temperature range and the connectivity state of the multi-way valve. The target operating condition is used to indicate the type of operating condition currently executed by the vehicle, wherein the operating condition type can be preset, for example, a large climbing condition, which is only an illustrative example here and does not limit the operating condition type. Among them, there is also a mapping relationship between the operating condition type and the connectivity state of the multi-way valve.

[0086] Optionally, the target connection state can be at least one of the first connection state, the second connection state and the third connection state, that is, the multi-way valve corresponds to these three connection states. When the target connection state is the first connection state, the power battery cooling circuit and the motor controller cooling circuit operate independently, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit; when the target connection state is the second connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator; when the target connection state is the third connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

[0087] For example, if it is detected that the current ambient temperature of the vehicle is within the first temperature range, it means that the current environment of the vehicle is summer. In this case, the power battery can be cooled by the cooling medium output by the compressor, and the motor controller can be cooled by the cooling medium output by the radiator. It is determined that the target connection state of the multi-way valve can be the first connection state. If it is detected that the current ambient temperature of the vehicle is within the second temperature range, it means that the current environment of the vehicle is winter. In this case, in order to avoid damage to the compressor when the compressor is used at a low temperature, the power battery and the motor controller can be controlled to share the radiator for cooling. Based on this, it is determined that the target connection state of the multi-way valve can be the second connection state.

[0088] Optionally, if it is detected that the working condition type of the working condition currently performed by the vehicle is a large climbing condition, in this case, it is determined that the connection state of the multi-way valve can be the third connection state. Because the temperature of the motor controller of the vehicle is high under this working condition, relying solely on the radiator to cool the motor controller may not meet the cooling demand of the motor controller, so a compressor can be introduced to cool the motor controller.

[0089] In this step, the target connectivity state of the multi-way valve is flexibly controlled according to the ambient temperature or target operating conditions of the vehicle, and then under the target connectivity state, the vehicle's power battery and motor controller are cooled according to the corresponding cooling mode. The cooling method determined in this way is more in line with the actual situation of the vehicle and can improve the cooling efficiency of the vehicle.

[0090] As an optional implementation, the vehicle cooling method also includes: in response to the target connectivity state of the multi-way valve being the first connectivity state and the temperature of the motor controller being greater than a temperature threshold within a preset time period, switching the target connectivity state of the multi-way valve from the first connectivity state to the third connectivity state.

[0091] In this embodiment, it can be seen from the above introduction that when the multi-way valve is in the first connected state, the power battery cooling circuit and the motor controller cooling circuit operate independently, and the power battery cooling circuit cools the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit cools the motor controller through the cooling medium output by the radiator. Based on this, when it is detected that the multi-way valve is in the first connected state, the temperature of the motor controller is greater than the temperature threshold within a preset time. In this case, it means that the cooling demand of the motor controller cannot be met by cooling the motor controller only by the radiator. Based on this, the connection state of the multi-way valve can be switched from the first connected state to the third connected state, so that the compressor cooling circuit is connected to the motor controller cooling circuit, so that the motor controller is not only cooled by the cooling medium output by the radiator, but also cooled by the cooling medium output by the compressor circuit.

[0092] In this step, when the multi-way valve is in the first connectivity state and the temperature of the motor controller is severely high for a long time, the target connectivity state of the three-way valve can be switched from the first connectivity state to the third connectivity state, and then the motor controller can be cooled jointly by the cooling medium output by the radiator and the cooling medium output by the compressor circuit to improve the cooling efficiency of the motor controller.

[0093] As an optional implementation, the vehicle cooling method further includes: in response to the multi-way valve being in a third connected state, controlling the cooling medium output by the compressor circuit to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion.

[0094] In this embodiment, it can be seen from the above introduction that when the multi-way valve is in the third connected state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit. That is to say, part of the cooling medium output by the compressor circuit flows into the power battery circuit to cool the power battery, and the other part flows into the motor controller cooling circuit to cool the motor controller. In this case, the cooling medium output by the compressor circuit can be controlled to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion, that is, the flow rate of the cooling medium input into the power battery cooling circuit and the flow rate of the cooling medium input into the motor controller cooling circuit each account for 50%.

[0095] In this step, when the multi-way valve is in the third connected state, the cooling medium output by the compressor circuit is controlled to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion, thereby ensuring the cooling effect of the power battery and the motor controller, avoiding over-cooling of the power battery and insufficient cooling of the motor controller, or over-cooling of the motor controller and insufficient cooling of the power battery.

[0096] As an optional implementation, the vehicle cooling method also includes: in response to the temperature of the cooling medium flowing through the power battery being greater than a first temperature threshold, increasing the rotation speed of the battery water pump, wherein the battery water pump is used to control the flow rate of the cooling medium flowing into the power battery; or, in response to the temperature of the cooling medium flowing through the motor controller being greater than a second temperature threshold, increasing the rotation speed of the motor water pump, wherein the motor water pump is used to control the flow rate of the cooling medium flowing into the motor controller; or, in response to the temperature of the cooling medium output by the radiator being greater than a third temperature threshold, increasing the rotation speed of the cooling fan, wherein the cooling fan is used to control the temperature of the cooling medium output by the radiator.

[0097] In this embodiment, the first temperature threshold is used to measure whether the power battery meets the cooling standard, the second temperature threshold is used to measure whether the motor controller meets the cooling standard, and the third temperature threshold is used to measure whether the cooling medium output by the radiator meets the cooling requirements of the power battery and / or the motor controller.

[0098] Optionally, a first temperature sensor is provided at the fluid outlet of the power battery cooling circuit to detect the temperature of the cooling medium flowing through the power battery. If it is detected that the temperature of the cooling medium flowing through the power battery is greater than a first temperature threshold, it indicates that the current temperature of the power battery does not meet the cooling standard. In this case, the battery water pump connected to the power battery can be controlled to increase the speed to increase the flow rate of the cooling medium flowing into the power battery, thereby improving the cooling effect on the power battery.

[0099] Optionally, a second temperature sensor is provided at the fluid outlet of the motor controller cooling circuit to detect the temperature of the cooling medium flowing through the motor controller. If it is detected that the temperature of the cooling medium flowing through the motor controller is greater than a second temperature threshold, it means that the current temperature of the motor controller does not meet the cooling standard. In this case, the motor water pump connected to the motor controller can be controlled to increase the speed to increase the flow rate of the cooling medium flowing into the motor controller, thereby improving the cooling effect on the motor controller.

[0100] Optionally, a third temperature sensor is provided at the outlet of the radiator in the cooling circuit of the motor controller to detect the temperature of the cooling medium flowing out of the radiator. If it is detected that the temperature of the cooling medium flowing out of the radiator is greater than a third temperature threshold, it means that the temperature of the cooling medium currently processed by the radiator is relatively high. In this case, the speed of the cooling fan connected to the radiator can be controlled to increase so as to increase the cooling efficiency of the cooling medium in the radiator.

[0101] Through the above steps, by increasing the rotation speed of the water pump and the fan, the flow rate of the cooling medium and the heat dissipation efficiency of the radiator can be increased, thereby effectively reducing the temperature of the power battery and the motor controller, keeping them within a suitable operating temperature range, and improving the vehicle cooling efficiency.

[0102] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0103] The embodiment of the present invention provides a vehicle cooling system that combines the cooling of the power battery and the motor controller of the vehicle. A three-way valve is provided in the cooling system, and the three-way valve is provided between the power battery cooling circuit of the vehicle and the motor controller cooling circuit. In summer, the three-way valve is controlled to be in a first connected state. In this connected state, the power battery cooling circuit of the vehicle and the motor controller cooling circuit of the vehicle operate independently, and the cooling medium discharged by the compressor cools the power battery of the vehicle, and the cooling medium cooled by the radiator cools the motor controller; when the three-way valve is in the first state, the temperature of the motor controller is seriously high for a long time, that is, when the cooling medium after the heat dissipation of the radiator is used to cool the motor controller, the cooling purpose of the motor controller cannot be met. In this case, the connected state of the three-way valve can be switched to a third connected state. In this connected state, the three ports of the three-way valve are connected to each other, and the cooling medium discharged by the compressor can cool the power battery and the motor controller at the same time, and the flow rate proportion of the cooling medium discharged by the compressor flowing to the power battery is consistent with the flow rate proportion flowing to the motor controller. In winter, the three-way valve is controlled to be in the second connected state. In this connected state, the cooling circuit of the vehicle's power battery and the cooling circuit of the motor controller are interconnected, the compressor is stopped, and the high-temperature cooling medium is cooled by the radiator and then enters the power battery and the motor controller at the same time to cool the power battery and the motor controller. In other words, in different seasons, the cooling method of the vehicle's power battery and motor controller can be flexibly switched through the three-way valve, and there is no need to set up a radiator dedicated to the power battery. The three-way valve can be used to share a radiator for the power battery and the motor controller, realizing resource integration of the vehicle's thermal management system, improving the integration of the cooling system, and there is no need to use a compressor to cool the power battery in winter, which greatly improves energy-saving efficiency, achieves the technical effect of improving the energy utilization rate of the vehicle, and effectively dissipating the heat of the vehicle's power battery and motor controller, thereby solving the technical problem of being unable to effectively cool the vehicle's power battery and motor controller.

[0104] Optionally, in order to ensure that the temperature of each component in the vehicle is within an appropriate range and flexibly control the heat dissipation of each component, the circulating water pump and the cooling fan both adopt pulse width modulation (Pulse Width Modulation, abbreviated as PWM).

[0105] like Figure 3As shown, a first temperature sensor, a second temperature sensor and a third temperature sensor may be provided in the cooling system of the vehicle. The first temperature sensor is used to monitor the temperature of the cooling medium flowing out of the power battery, thereby controlling the rotation speed of the battery water pump, thereby adjusting the flow of the cooling medium flowing through the power battery; the second temperature sensor is used to monitor the temperature of the cooling medium flowing out of the motor controller, thereby controlling the rotation speed of the motor water pump, thereby adjusting the flow of the cooling medium flowing through the motor controller; the second temperature sensor is used to monitor the outlet water temperature of the radiator, thereby controlling the rotation speed of the cooling fan, and ensuring that the cooling medium is within a suitable range.

[0106] In the cooling system of the above-mentioned vehicle, in winter, the power battery and the motor controller share a radiator for cooling, which simplifies the system structure and improves the utilization rate of the radiator; in summer, when the temperature of the motor controller is too high or the vehicle is climbing a large slope, a compressor can be used to force the controller to cool down; in summer, the power battery cooling and the controller cooling can be independent of each other to ensure that the temperature of both is within the appropriate range. The radiator dedicated to power battery cooling is cancelled, and the radiator used with the motor controller is shared, realizing the integration of the thermal management system resources of the whole vehicle and improving integration; in winter, the compressor is no longer used to cool the power battery, and energy saving reaches 50% to 70%.

[0107] Example 2

[0108] According to an embodiment of the present invention, a cooling device for a vehicle is also provided. It should be noted that the cooling device for a vehicle can be used to execute the cooling method for a vehicle in an embodiment of the present invention.

[0109] Figure 5 is a schematic diagram of a cooling device for a vehicle according to an embodiment of the present invention. The cooling device 50 for the vehicle includes: a determination module 52 and a control module 54 .

[0110] A determination module 52, configured to determine a target connection state of the multi-way valve based on an ambient temperature or a target operating condition of the vehicle;

[0111] The control module 54 is used to control the multi-way valve to connect according to the target connection state, wherein the target connection state is at least one of the following connection states: a first connection state, a second connection state and a third connection state. In the first connection state, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit. In the second connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator. In the third connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

[0112] Optionally, the determination module 52 is also used to: detect the target temperature range of the ambient temperature of the vehicle; determine a preset connectivity state corresponding to the target temperature range as the target connectivity state; or, detect the target operating condition of the vehicle; determine a preset connectivity state corresponding to the target operating condition as the target connectivity state.

[0113] Optionally, the vehicle's cooling device 50 is also used to: in response to the target connectivity state of the multi-way valve being the first connectivity state and the temperature of the motor controller being greater than a temperature threshold within a preset time period, switch the target connectivity state of the multi-way valve from the first connectivity state to a third connectivity state.

[0114] Optionally, the cooling device 50 of the vehicle is also used to: in response to the multi-way valve being in the third connection state, control the cooling medium output by the compressor circuit to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion.

[0115] Optionally, the vehicle's cooling device 50 is also used to: in response to the temperature of the cooling medium flowing through the power battery being greater than a first temperature threshold, increase the rotation speed of the battery water pump, wherein the battery water pump is used to control the flow rate of the cooling medium flowing into the power battery; or, in response to the temperature of the cooling medium flowing through the motor controller being greater than a second temperature threshold, increase the rotation speed of the motor water pump, wherein the motor water pump is used to control the flow rate of the cooling medium flowing into the motor controller; or, in response to the temperature of the cooling medium output by the radiator being greater than a third temperature threshold, increase the rotation speed of the cooling fan, wherein the cooling fan is used to control the temperature of the cooling medium output by the radiator.

[0116] Example 3

[0117] An embodiment of the present application further provides an electronic device, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention when running.

[0118] Example 4

[0119] An embodiment of the present application further provides a computer-readable storage medium, which includes a stored executable program, wherein when the executable program is running, the device where the computer-readable storage medium is located is controlled to execute the methods in various embodiments of the present invention.

[0120] Example 5

[0121] An embodiment of the present application further provides a computer program product, including a computer program, which implements the methods in various embodiments of the present invention when executed by a processor.

[0122] Example 6

[0123] An embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method in each embodiment of the present invention is implemented.

[0124] Example 7

[0125] The embodiments of the present application further provide a computer program, which implements the methods in the above-mentioned embodiments of the present invention when executed by a processor.

[0126] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0127] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0128] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0129] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0130] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0131] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, Read-Only Memory (ROM), Random Access Memory (RAM), mobile hard disk, magnetic disk or optical disk, etc., various media that can store program codes.

[0132] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cooling system for a vehicle, characterized in that: include: A power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve, wherein the multi-way valve is arranged between the power battery cooling circuit and the motor controller cooling circuit, wherein, When the multi-way valve is in the first connected state, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit; and / or, When the multi-way valve is in the second connected state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator; and / or, When the multi-way valve is in the third connected state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

2. The cooling system according to claim 1, characterized in that: The multi-way valve at least includes: a three-way valve, wherein a first port of the three-way valve is connected to a fluid outlet of the power battery cooling circuit, a second port of the three-way valve is connected to a fluid inlet of the power battery cooling circuit, and a third port of the three-way valve is connected to a fluid inlet of the motor controller cooling circuit; The first connectivity state is used to indicate that the first port is connected to the second port, and the third port is not connected; the second connectivity state is used to indicate that the first port is connected to the third port, and the second port is not connected; the third connectivity state is used to indicate that the first port is connected to the second port and the third port, respectively.

3. The cooling system according to claim 1, characterized in that: The cooling system further comprises: A first temperature sensor, disposed at a fluid outlet of the power battery cooling circuit, for detecting a temperature of a cooling medium flowing through the power battery; A second temperature sensor, disposed at a fluid outlet of the motor controller cooling circuit, for detecting a temperature of a cooling medium flowing through the motor controller; The third temperature sensor is arranged at the outlet of the radiator in the cooling circuit of the motor controller, and is used to detect the temperature of the cooling medium output by the radiator.

4. The cooling system according to claim 1, characterized in that: The cooling system further comprises: a battery water pump, disposed on the power battery cooling circuit and connected to the fluid inlet of the power battery, for controlling the flow rate of the cooling medium flowing into the power battery; a motor water pump, arranged on the cooling circuit of the motor controller and connected to the fluid inlet of the motor controller, for controlling the flow rate of the cooling medium flowing into the motor controller; The heat dissipation fan is arranged on the cooling circuit of the motor controller and connected to the radiator, and is used for controlling the temperature of the cooling medium output by the radiator.

5. The cooling system according to claim 1, characterized in that: The cooling medium output by the compressor circuit flows into the power battery cooling circuit and / or the motor controller cooling circuit through a plate heat exchanger.

6. The cooling system according to claim 1, characterized in that: The cooling system of the vehicle includes a controller, which is used to detect a target temperature range of an ambient temperature of the vehicle and switch a communication state of the multi-way valve according to the target temperature range.

7. The cooling system according to claim 1 or 6, characterized in that: The controller is also used to detect the target operating condition of the vehicle and switch the connection state of the multi-way valve according to the target operating condition.

8. A method for cooling a vehicle, characterized in that: Applied in a cooling system of a vehicle, the cooling system of the vehicle includes a power battery cooling circuit, a motor controller cooling circuit, a compressor circuit and a multi-way valve, the method includes: Determining a target connection state of the multi-way valve based on an ambient temperature or a target operating condition of the vehicle; The multi-way valve is controlled to be connected according to the target connection state, wherein the target connection state is at least one of the following connection states: a first connection state, a second connection state and a third connection state. In the first connection state, the power battery cooling circuit is used to cool the power battery in the vehicle through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller in the vehicle through the cooling medium output by the radiator in the motor controller cooling circuit. In the second connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the radiator, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator. In the third connection state, the power battery cooling circuit is used to cool the power battery through the cooling medium output by the compressor circuit, and the motor controller cooling circuit is used to cool the motor controller through the cooling medium output by the radiator and the cooling medium output by the compressor circuit.

9. The cooling method according to claim 8, characterized in that: Determining a target connection state of the multi-way valve based on the ambient temperature or the target operating condition includes: Detecting a target temperature range of the ambient temperature of the vehicle; determining a preset connectivity state corresponding to the target temperature range as the target connectivity state; or, Detecting a target operating condition of the vehicle; and determining a preset connectivity state corresponding to the target operating condition as the target connectivity state.

10. The cooling method according to claim 9, characterized in that: The method further comprises: In response to the target connectivity state of the multi-way valve being the first connectivity state and the temperature of the motor controller being greater than a temperature threshold within a preset time period, the target connectivity state of the multi-way valve is switched from the first connectivity state to the third connectivity state.

11. The cooling method according to claim 8, characterized in that: The method further comprises: In response to the multi-way valve being in the third communication state, the cooling medium output by the compressor circuit is controlled to be input into the power battery cooling circuit and the motor controller cooling circuit in the same proportion.

12. The cooling method according to claim 8, characterized in that: The method further comprises: In response to the temperature of the cooling medium flowing through the power battery being greater than a first temperature threshold, increasing the rotation speed of a battery water pump, wherein the battery water pump is used to control the flow rate of the cooling medium flowing into the power battery; or, In response to the temperature of the cooling medium flowing through the motor controller being greater than a second temperature threshold, increasing the rotation speed of the motor water pump, wherein the motor water pump is used to control the flow rate of the cooling medium flowing into the motor controller; or, In response to the temperature of the cooling medium output by the radiator being greater than a third temperature threshold, the rotation speed of a cooling fan is increased, wherein the cooling fan is used to control the temperature of the cooling medium output by the radiator.

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