Cooling method of suspension system, electronic equipment, storage medium and vehicle

Abstract

The invention discloses a cooling method of a suspension system, electronic equipment, a storage medium and a vehicle, relates to the technical field of thermal management, and aims to solve the problem that the performance and the service life of the suspension system are reduced due to the fact that heat generated by the suspension system cannot be effectively dissipated in the related technology. The cooling method of the suspension system comprises the steps that the operation working condition of the suspension system is obtained; based on the operation condition of the suspension system, the cooling system is controlled to operate according to the suspension motor cooling strategy and / or the suspension controller cooling strategy, and cooling of the suspension system is achieved; wherein the suspension motor cooling strategy is to cool the suspension motor based on the temperature of the suspension motor and the temperature of a cooling medium flowing through the suspension motor; the suspension controller cooling strategy is to cool the suspension controller based on a temperature of the suspension controller and a temperature of a cooling medium flowing through the suspension controller.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management, and particularly to a cooling method for a suspension system, an electronic device, a storage medium, and a vehicle. Background Art

[0002] With the continuous development of the automotive industry, the performance requirements for vehicle suspension systems are increasing day by day. As a key part connecting the vehicle body and the wheels, the suspension system not only has to undertake the basic tasks of supporting the vehicle body weight and buffering road excitations, but also plays a crucial role in the handling stability and riding comfort of the vehicle. During vehicle operation, especially during long-term continuous driving, various components in the suspension system, such as suspension motors and suspension controllers, will generate a large amount of heat due to continuous operation. If effective heat dissipation cannot be achieved, it will seriously affect the performance and lifespan of the suspension system. Moreover, the heat accumulation in the suspension system will change the damping characteristics of the shock absorbers in the suspension system, reducing the riding comfort of the vehicle. Therefore, how to perform thermal management on the vehicle suspension system is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a cooling method for a suspension system, an electronic device, a storage medium, and a vehicle, aiming to solve the problem in the related art that the heat generated by the suspension system cannot be effectively dissipated, resulting in a reduction in the performance and lifespan of the suspension system.

[0004] To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, the embodiments of the present application provide a cooling method for a suspension system, the method including: obtaining the operating condition of the suspension system; based on the operating condition of the suspension system, controlling the cooling system to operate according to a suspension motor cooling strategy and / or a suspension controller cooling strategy to achieve cooling of the suspension system, where the suspension motor cooling strategy is to cool the suspension motor based on the temperature of the suspension motor and the temperature of the cooling medium flowing through the suspension motor; the suspension controller cooling strategy is to cool the suspension controller based on the temperature of the suspension controller and the temperature of the cooling medium flowing through the suspension controller.

[0006] The cooling method of the suspension system provided by the embodiments of the present application can meet the heat dissipation requirements of the suspension system under different operating conditions by controlling the cooling system to operate according to the suspension motor cooling strategy and / or the suspension controller cooling strategy corresponding to the operating conditions, enabling the suspension motor and / or the suspension controller to dissipate heat effectively, avoiding damage to the suspension motor and / or the suspension controller due to overheating, ensuring the normal operation of the suspension system, improving the lifespan and performance of the suspension system, and thus enhancing the ride comfort of the vehicle. Additionally, the suspension motor cooling strategy and / or the suspension controller cooling strategy can be adjusted according to the temperature of the suspension motor, the temperature of the cooling medium flowing through the suspension motor, and / or the temperature of the suspension controller, the temperature of the cooling medium flowing through the suspension controller, to achieve the cooling of the suspension motor and / or the suspension controller, avoid unnecessary energy waste, reduce the energy consumption of the cooling system while ensuring the cooling effect of the suspension system, and improve the energy utilization efficiency.

[0007] In some embodiments, the operating conditions include at least one of the following: the first operating condition, the second operating condition, and the third operating condition; wherein, the first operating condition is used to represent that the suspension motor stops operating; the second operating condition is used to represent that the suspension motor operates under a normal load state; the third operating condition is used to represent that the suspension motor operates under a high load state.

[0008] In some embodiments, the cooling system includes a first cooling branch and a second cooling branch, the suspension controller is located in the first cooling branch, and the suspension motor is located in the second cooling branch; the suspension controller cooling strategy is used to adjust the cooling flow rate of the first cooling branch; the motor controller cooling strategy is used to adjust the cooling flow rate of the second cooling branch.

[0009] In some embodiments, the suspension motor cooling strategy is used to adjust the operating parameters of the first liquid pump and / or the first regulating valve on the second cooling branch to adjust the cooling flow rate of the second cooling branch; the suspension controller cooling strategy is used to adjust the operating parameters of the second liquid pump and / or the second regulating valve on the first cooling branch to adjust the cooling flow rate of the first cooling branch.

[0010] In some embodiments, when the first cooling branch and the second cooling branch are in parallel, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, and the cooling capacity distribution principle is used to represent that the cooling capacity distribution priority of the suspension controller is greater than that of the suspension motor.

[0011] In some embodiments, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: when the temperature of the suspension motor does not reach the motor high temperature threshold within the first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is less than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, when the temperature of the suspension motor reaches the motor high temperature threshold within the first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0012] In some embodiments, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: when the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is greater than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, when the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0013] In some embodiments, the cooling system further includes a switching device, and the switching device is adapted to conduct or cut off the flow path between the second cooling branch and the first cooling branch.

[0014] In some embodiments, the method further includes: when the temperature of the cooling medium in the second cooling branch is less than the preset temperature threshold, controlling the switching device to cut off the flow path between the first cooling branch and the second cooling branch; when the temperature of the cooling medium in the second cooling branch is greater than or equal to the preset temperature threshold, controlling the switching device to conduct the flow path between the first cooling branch and the second cooling branch.

[0015] In some embodiments, the suspension motor cooling strategy corresponding to the first operating condition includes: when the motor temperature and the first cooling medium temperature satisfy the first stop operating condition, controlling the first liquid pump to stop operating; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch; or, when the motor temperature and the first cooling medium temperature do not satisfy the first stop operating condition, adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

[0016] In some embodiments, the first stop operating condition includes: the motor temperature is less than the motor low-temperature threshold and the first cooling medium temperature is less than the cooling medium low-temperature threshold.

[0017] In some embodiments, the suspension motor cooling strategy corresponding to the second operating condition includes: adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

[0018] In some embodiments, the suspension motor cooling strategy corresponding to the third operating condition includes: controlling the first liquid pump to operate at the maximum rotational speed when the motor temperature is greater than the motor high-temperature threshold; or, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature when the motor temperature is less than or equal to the motor high-temperature threshold; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

[0019] In some embodiments, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature includes: when the first cooling medium temperature is less than or equal to the cooling medium low-temperature threshold and the motor temperature is within the preset motor temperature range, adjusting the rotational speed of the first liquid pump based on the corresponding relationship between the motor temperature and the liquid pump rotational speed, the upper limit value of the preset motor temperature range is the motor high-temperature threshold, and the lower limit value of the preset motor temperature range is the motor low-temperature threshold; or, when the first cooling medium temperature is less than or equal to the cooling medium low-temperature threshold and the motor temperature is greater than the motor high-temperature threshold, adjusting the rotational speed of the first liquid pump to the maximum rotational speed; or, when the first cooling medium temperature is less than or equal to the cooling medium low-temperature threshold and the motor temperature is less than the motor low-temperature threshold, adjusting the rotational speed of the first liquid pump to the minimum rotational speed.

[0020] In some embodiments, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature includes: when the first cooling medium temperature is greater than the cooling medium high-temperature threshold, adjusting the rotational speed of the first liquid pump to the maximum rotational speed.

[0021] In some embodiments, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the temperature of the first cooling medium includes: when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is less than the motor low temperature threshold, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump; or, when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is within a preset motor temperature range, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump, and the relationship between the motor temperature and the rotational speed of the liquid pump; or, when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is greater than the motor high temperature threshold, adjusting the rotational speed of the first liquid pump to the maximum rotational speed; wherein, the upper limit value of the preset cooling medium temperature range is the cooling medium high temperature threshold, and the lower limit value of the preset cooling medium temperature range is the cooling medium low temperature threshold; the upper limit value of the preset motor temperature range is the motor high temperature threshold, and the lower limit value of the preset motor temperature range is the motor low temperature threshold.

[0022] In some embodiments, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump, and the relationship between the motor temperature and the rotational speed of the liquid pump includes: determining a first rotational speed based on the corresponding relationship between the motor temperature and the rotational speed of the liquid pump; determining a second rotational speed based on the corresponding relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump; and adjusting the rotational speed of the first liquid pump to the maximum value of the first rotational speed and the second rotational speed.

[0023] In some embodiments, the suspension controller cooling strategy corresponding to the first operating condition includes: when the controller temperature and the temperature of the second cooling medium satisfy the second stop operating condition, controlling the second liquid pump to stop operating; wherein, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the temperature of the second cooling medium do not satisfy the second stop operating condition, adjusting the rotational speed of the second liquid pump based on the controller temperature and / or the temperature of the second cooling medium.

[0024] In some embodiments, the suspension controller cooling strategy corresponding to the second operating condition includes: when the controller temperature and the temperature of the second cooling medium satisfy the low temperature threshold condition, controlling the second liquid pump to operate at the minimum rotational speed; wherein, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the temperature of the cooling medium satisfy the high temperature threshold condition, controlling the second liquid pump to operate at the maximum rotational speed; or, when the controller temperature and the temperature of the cooling medium do not satisfy the low temperature threshold condition and the high temperature threshold condition, adjusting the rotational speed of the second liquid pump based on the controller temperature and / or the temperature of the second cooling medium.

[0025] In some embodiments, the suspension controller cooling strategy corresponding to the third operating condition includes: when the controller temperature is greater than the controller high temperature threshold, controlling the second liquid pump to operate at the maximum speed; or, when the controller temperature is less than or equal to the controller high temperature threshold, adjusting the speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

[0026] In some embodiments, adjusting the speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature includes: adjusting the speed of the second liquid pump based on the correspondence between the controller temperature and / or the second cooling medium temperature and the speed of the second liquid pump.

[0027] In some embodiments, the cooling system further includes a cooling fan; the suspension controller cooling strategy is further used to control the speed of the cooling fan to control the cooling amount of the suspension controller.

[0028] In some embodiments, the suspension controller cooling strategy corresponding to the first operating condition includes: when the controller temperature and the second cooling medium temperature meet the second stop operating condition, controlling the cooling fan to stop operating; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the second cooling medium temperature do not meet the second stop operating condition, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0029] In some embodiments, the second stop operating condition includes: the controller temperature is less than the controller low temperature threshold and the second cooling medium temperature is less than the cooling medium low temperature threshold.

[0030] In some embodiments, the suspension controller cooling strategy corresponding to the second operating condition includes: when the controller temperature and the second cooling medium temperature meet the low temperature threshold condition, controlling the cooling fan to operate at the minimum speed; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the cooling medium temperature meet the high temperature threshold condition, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature and the cooling medium temperature do not meet the low temperature threshold condition and the high temperature threshold condition, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0031] In some embodiments, the low-temperature threshold conditions include: the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold; the high-temperature threshold conditions include: the controller temperature is greater than the controller high-temperature threshold and / or the second cooling medium temperature is greater than the cooling medium high-temperature threshold.

[0032] In some embodiments, the suspension controller cooling strategy corresponding to the third operating condition includes: when the controller temperature is greater than or equal to the controller high-temperature threshold, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature is less than the controller high-temperature threshold, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

[0033] In some embodiments, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature includes: adjusting the speed of the cooling fan based on the correspondence between the controller temperature and / or the second cooling medium temperature and the speed of the cooling fan.

[0034] In some embodiments, the cooling system includes a third cooling branch, the suspension motor and the suspension controller are connected in series and both are located in the third cooling branch; the suspension motor cooling strategy and the suspension controller cooling strategy are combined into a combined cooling strategy, and the combined cooling strategy is used to adjust the third liquid pump related to the third cooling branch to adjust the cooling flow rate of the third cooling branch.

[0035] In some embodiments, the combined cooling strategy corresponding to the first operating condition includes: when the controller temperature and the motor temperature meet the third stop operating condition, controlling the third liquid pump to stop running; or, when the controller temperature and the motor temperature meet the third stop operating condition, adjusting the speed of the third liquid pump based on the controller temperature, the third cooling medium temperature and the motor temperature; wherein, the controller temperature is the temperature of the suspension controller, the motor temperature is the temperature of the suspension motor, and the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch.

[0036] In some embodiments, the combined cooling strategy corresponding to the second operating condition includes: controlling the third liquid pump to operate at the minimum speed when the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the low temperature threshold condition; wherein, the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, controlling the third liquid pump to operate at the maximum speed when the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the high temperature threshold condition; or, adjusting the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium when the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low temperature threshold condition and the high temperature threshold condition.

[0037] In some embodiments, the combined cooling strategy corresponding to the third operating condition includes: controlling the third liquid pump to operate at the maximum speed when the controller temperature and the motor temperature meet the maximum cooling requirement condition; or, adjusting the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium when the controller temperature and the motor temperature do not meet the maximum cooling requirement condition; wherein, the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

[0038] In some embodiments, the cooling system further includes a cooling fan; the combined cooling strategy is further used to control the speed of the cooling fan to control the cooling amount of the suspension controller and the suspension motor.

[0039] In some embodiments, the combined cooling strategy corresponding to the first operating condition includes: controlling the cooling fan to stop running when the controller temperature and the motor temperature meet the third stop operating condition; or, adjusting the speed of the cooling fan based on the controller temperature, the temperature of the third cooling medium, and the motor temperature when the controller temperature and the motor temperature meet the third stop operating condition; wherein, the controller temperature is the temperature of the suspension controller, and the motor temperature is the temperature of the suspension motor.

[0040] In some embodiments, the combined cooling strategy corresponding to the second operating condition includes: when the controller temperature, the motor temperature, and the third cooling medium temperature meet the low temperature threshold conditions, controlling the cooling fan to operate at the minimum speed; wherein, the controller temperature is the temperature of the suspension controller, the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, when the controller temperature, the motor temperature, and the third cooling medium temperature meet the high temperature threshold conditions, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature, the motor temperature, and the third cooling medium temperature do not meet the low temperature threshold conditions and the high temperature threshold conditions, adjusting the speed of the cooling fan based on the controller temperature, the motor temperature, and the third cooling medium temperature.

[0041] In some embodiments, the combined cooling strategy corresponding to the third operating condition includes: when the controller temperature and the motor temperature meet the maximum cooling capacity requirement conditions, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement conditions, adjusting the speed of the cooling fan based on the controller temperature, the motor temperature, and the third cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

[0042] In some embodiments, the third stop operating condition includes: the controller temperature is less than the controller low temperature threshold, and the motor temperature is less than the motor low temperature threshold.

[0043] In some embodiments, the low temperature threshold conditions include: the controller temperature is less than the controller low temperature threshold, the motor temperature is less than the motor low temperature threshold, and the third cooling medium temperature is less than the cooling medium low temperature threshold; the high temperature threshold conditions include at least one of the following: the controller temperature is greater than the controller high temperature threshold, the motor temperature is greater than the motor high temperature threshold, and the third cooling medium temperature is greater than the cooling medium high temperature threshold.

[0044] In some embodiments, the maximum cooling capacity requirement conditions include: the controller temperature is greater than the controller high temperature threshold, and the motor temperature is greater than the motor high temperature threshold.

[0045] In some embodiments, the third cooling branch is further connected to the powertrain and / or other components to be cooled; the speed of the third liquid pump is determined according to at least one of the liquid pump speeds determined by the cooling strategy of the powertrain and the liquid pump speeds determined by the cooling strategies of other components to be cooled, and the liquid pump speed determined by the combined cooling strategy.

[0046] In some embodiments, the third cooling branch is also connected to the powertrain and / or other components to be cooled; the rotational speed of the cooling fan is determined based on at least one of the rotational speed of the fan determined according to the cooling strategy of the powertrain, the rotational speed of the fan determined according to the cooling strategy of other components to be cooled, the rotational speed of the fan determined according to the cooling strategy of the air conditioning system, and the rotational speed of the fan determined according to the combined cooling strategy.

[0047] In some embodiments, the above method further includes: when a failure occurs in the cooling system, controlling the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value.

[0048] In some embodiments, obtaining the operating condition of the suspension system includes: receiving indication information sent by a suspension controller in the suspension system, where the indication information is used to indicate the operating condition of the suspension system.

[0049] In some embodiments, obtaining the operating condition of the suspension system includes: obtaining road surface information of the road on which the vehicle travels; based on the road surface information, determining the operating condition of the suspension system.

[0050] In a second aspect, there is provided an electronic device, including: a processor and a memory for storing instructions executable by the processor; wherein, the processor is configured to transmit required signals and execute the instructions to implement the cooling method of the suspension system described above.

[0051] In a third aspect, there is provided an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the cooling method of the suspension system described above.

[0052] In a fourth aspect, there is provided a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the cooling method of the suspension system in any of the above embodiments is implemented.

[0053] In a fifth aspect, there is provided a suspension system, where the suspension system includes the electronic device described above, or the computer-readable storage medium described above.

[0054] In a sixth aspect, there is provided a vehicle, including: the electronic device described above, or the computer-readable storage medium described above, or the suspension system described above.

[0055] In a seventh aspect, there is provided a computer program product, which includes computer program instructions, and when the computer program instructions are executed by a processor, the cooling method of the suspension system in any of the above embodiments is implemented.

[0056] For the specific descriptions of the second to seventh aspects and their various implementation manners in this application, reference may be made to the detailed descriptions in the first aspect and its various implementation manners; moreover, for the beneficial effects of the second to seventh aspects and their various implementation manners, reference may be made to the analysis of the beneficial effects in the first aspect and its various implementation manners, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0058] Figure 1 Schematic structural diagram of an exemplary second cooling branch provided for an embodiment of this application;

[0059] Figure 2 Schematic structural diagram of another exemplary second cooling branch provided for an embodiment of this application;

[0060] Figure 3 Schematic connection diagram of multiple suspension motors provided for an embodiment of this application;

[0061] Figure 4 Schematic structural diagram of an exemplary first cooling branch provided for an embodiment of this application;

[0062] Figure 5 Schematic structural diagram of a parallel connection of an exemplary first cooling branch and a second cooling branch provided for an embodiment of this application;

[0063] Figure 6 Schematic structural diagram of an exemplary third cooling branch provided for an embodiment of this application;

[0064] Figure 7 Flowchart of a cooling method for a suspension system provided for an embodiment of this application;

[0065] Figure 8 Schematic diagram of a suspension motor cooling strategy corresponding to different operating conditions provided for an embodiment of this application;

[0066] Figure 9 Schematic diagram of a cooling strategy for an exemplary second cooling branch provided for an embodiment of this application;

[0067] Figure 10 Schematic diagram of a suspension controller cooling strategy corresponding to different operating conditions provided for an embodiment of this application;

[0068] Figure 11Another schematic diagram of the suspension controller cooling strategy corresponding to different operating conditions provided by the embodiments of the present application;

[0069] Figure 12 A schematic diagram of the control strategy for the cooling fan of the third cooling branch provided by the embodiments of the present application;

[0070] Figure 13 A schematic diagram of the corresponding relationship between the duty cycle and speed of an exemplary cooling fan and temperature provided by the embodiments of the present application;

[0071] Figure 14 A schematic diagram of the combined cooling strategy corresponding to different operating conditions provided by the embodiments of the present application;

[0072] Figure 15 A schematic diagram of the control strategy for the third liquid pump of the third cooling branch provided by the embodiments of the present application;

[0073] Figure 16 A schematic diagram of the corresponding relationship between the duty cycle of an exemplary third liquid pump and temperature provided by the embodiments of the present application;

[0074] Figure 17 Another schematic diagram of the combined cooling strategy corresponding to different operating conditions provided by the embodiments of the present application;

[0075] Figure 18 A flowchart of another cooling method for the suspension system provided by the embodiments of the present application;

[0076] Figure 19 A schematic diagram of the structure of a cooling device for a suspension system provided by the embodiments of the present application;

[0077] Figure 20 A schematic diagram of the structure of an electronic device provided by the embodiments of the present application. Detailed implementation manners

[0078] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0079] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0080] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", and "communicated with" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0081] In the embodiments of this application, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, article or device comprising such element.

[0082] In the embodiments of this application, words such as "exemplary" or "for example" are used to mean as an example, illustration or explanation. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0083] In the description of this application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. The "and / or" herein is merely a description of the relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0084] The suspension system is an assembly of all components connecting the vehicle body and wheels. The suspension system has functions such as supporting the vehicle body, absorbing road surface impacts, improving ride comfort, adjusting the vehicle body posture, enhancing handling performance, and ensuring normal movement trajectories of the wheels during their bouncing. The fully active suspension can actively control the vehicle movement according to the overall vehicle motion state by using electronically controlled components to replace the damping and elastic elements. When the active output force of the suspension system is large, heat dissipation requirements of the suspension system cannot be met only by air convection heat transfer, which affects the performance and service life of the suspension system. Therefore, forced cooling of the suspension system is required. Thus, a cooling system for the suspension system and corresponding cooling control strategies need to be developed to meet the heat dissipation requirements of the suspension system.

[0085] In related technologies, an electric vehicle cooling system is proposed for cooling the motor unit and charging unit of an electric vehicle. The electric vehicle cooling system includes: a motor cooling branch and a charging cooling branch connected in parallel, with a motor unit arranged on the motor cooling branch and a charging unit arranged on the charging cooling branch; a common cooling main line, where the common cooling main line is connected in series with the motor cooling branch to form a motor cooling circuit for cooling the motor unit, and the common cooling main line is connected in series with the charging cooling branch to form a charging cooling circuit for cooling the charging unit. This electric vehicle cooling system can be used for pure electric vehicles or hybrid electric vehicles. Through the common cooling main line shared by the motor cooling circuit and the charging cooling circuit, the occupied space of the entire cooling system is effectively reduced. Moreover, by arranging cooling elements, such as radiators and / or liquid pumps, on the common cooling main line, the components of the cooling system are further reduced, reducing space occupancy. In addition, this electric vehicle cooling system can time-share and reuse the common cooling main line and the cooling elements thereon, and select to cool the motor unit or the charging unit according to the vehicle state, providing different cooling capabilities and avoiding energy waste. However, this method only cools the drive motor and charging module of the vehicle and does not involve the thermal management of the vehicle's suspension system.

[0086] Another related technology proposes a thermal management system and operating method for comprehensively utilizing water-circulated thermal energy in electric vehicles. The thermal management system includes a refrigerant circulation circuit, comprising a main refrigerant circulation circuit and two branch refrigerant circulation circuits. The main refrigerant circulation circuit is equipped with an electronic compressor and a water-cooled condenser. The first branch refrigerant circulation circuit is equipped with an evaporator electronic expansion valve and an air conditioner evaporator. The second branch refrigerant circulation circuit is equipped with a water-cooled heat exchanger electronic expansion valve and a water-cooled heat exchanger. The thermal management system also includes a water circulation circuit, comprising a main water circulation circuit and at least two branch water circulation circuits. The first branch water circulation circuit exchanges heat with the water-cooled heat exchanger to cool the battery pack, while the second branch water circulation circuit exchanges heat with the water-cooled condenser to heat the passenger compartment. The addition of a water circulation circuit to the thermal management system allows the two branches of the water circulation circuit to exchange heat with the refrigerant in the air conditioning system, fully leveraging the high cooling efficiency of the air conditioning system and fully utilizing the heat energy generated by other vehicle components. However, this approach addresses cooling the vehicle's passenger compartment and battery, but doesn't address cooling the suspension system. For fully active suspension systems, key components require forced cooling to maintain optimal suspension performance. Therefore, thermal management of the vehicle's suspension system remains a pressing technical challenge.

[0087] In response to the above problems, an embodiment of the present application provides a cooling method for a suspension system. By controlling the cooling system to operate according to the suspension motor cooling strategy and / or suspension controller cooling strategy corresponding to the operating conditions, the heat dissipation requirements of the suspension system under different operating conditions can be met, so that the suspension motor and / or suspension controller can effectively dissipate heat, avoid damage to the suspension motor and / or suspension controller due to overheating, ensure the normal operation of the suspension system, and improve the life and performance of the suspension system, thereby improving the ride comfort of the vehicle. In addition, the suspension motor cooling strategy and / or suspension controller cooling strategy can be adjusted according to the temperature of the suspension motor, the temperature of the cooling medium flowing through the suspension motor and / or the temperature of the suspension controller, and the temperature of the cooling medium flowing through the suspension controller to achieve cooling of the suspension motor and / or suspension controller, which can avoid unnecessary energy waste and achieve the goal of reducing the energy consumption of the cooling system and improving energy utilization efficiency while ensuring the cooling effect of the suspension system.

[0088] For ease of understanding, the cooling method for the suspension system provided in this application is described in detail below with reference to the accompanying drawings.

[0089] An embodiment of the present application provides a vehicle, which may include the following cooling system, which is used to cool the vehicle's suspension system.

[0090] When the vehicle passes through a road surface with poor road conditions such as potholes, bumps, and unevenness, the shock absorber slows down the road impact and vibration through the internal damping oil or gas. Components such as pistons and valves inside the shock absorber rub against each other, generating a large amount of heat. When the suspension motor frequently adjusts parameters such as the height and stiffness of the suspension, the internal motor components convert electrical energy into mechanical energy, generating heat. The suspension controller frequently processes sensor signals and issues control commands, and the working load of the electronic components of the suspension controller increases, generating heat. Therefore, to prevent the suspension motor and the suspension controller from being affected by heat and the working efficiency from decreasing, it is necessary to dissipate heat from the suspension motor and the suspension controller to maintain the normal operation of the suspension system.

[0091] In some embodiments, the cooling system can cool the suspension motor by setting up a second cooling branch. The second cooling branch can be set as an independent cooling circuit.

[0092] Figure 1 As a schematic structural diagram of an exemplary second cooling branch provided by an embodiment of the present application, as Figure 1 shown, the second cooling branch 100 includes: a first liquid pump 101, a suspension motor 102, a temperature sensor 103, and a suspension secondary liquid tank 104.

[0093] In some embodiments, the second cooling branch 100 is a loop for the circulation of the first cooling medium constructed by sequentially connecting the first liquid pump 101, the suspension motor 102, and the suspension secondary liquid tank 104. The first cooling medium circulation loop is used to adjust the temperature of the suspension motor.

[0094] In some embodiments, the temperature sensor 103 is used to collect the temperature of the first cooling medium in the second cooling branch 100. Among them, the embodiments of the present application do not limit the position and quantity of the temperature sensor 103. The quantity of the temperature sensor 103 can be multiple, and the temperature sensor 103 can be located at any position in the second cooling branch 100.

[0095] In some embodiments, the heat dissipation method of the suspension motor 102 mainly comes from the heat dissipation of the cooling medium in the second cooling branch 100 and the air cooling of the motor housing.

[0096] As an example, the heat dissipation amount of the air cooling of the motor housing mainly depends on the structural design of the electromagnetic damper in the suspension system and the position of the suspension motor. Usually, the heat dissipation amount of the air cooling of the housing of a single electromagnetic damper can reach 100W - 300W.

[0097] For the heat dissipation of the cooling medium, a radiator or simple connecting pipes can be used for heat dissipation. As an example of a radiator, the heat dissipation amount depends on the heat exchange area of the radiator and the flow rate of the cooling medium. As another example of air-cooled heat dissipation through pipes, the total length of the connecting pipes between the front and rear compartments of the second cooling branch 100 is about 15 m - 20 m. Taking the standard connecting pipe with an inner diameter of 20 mm as an example, the heat exchange area of a 1 m connecting pipe is 0.066 m 2 . Taking the first cooling medium temperature of 55 °C and the ambient temperature of 30 °C as an example, the heat dissipation amount of the connecting pipe can reach 250 W - 400 W. Taking the extremely harsh working condition of the first cooling medium temperature of 101 °C and the ambient temperature of 30 °C as an example, the heat dissipation amount of the connecting pipe can reach 800 W - 1000 W.

[0098] It should be understood that the second cooling branch 100 can adjust the cooling strategy according to the operating conditions of the suspension system, that is, the second cooling branch 100 has a small heat dissipation amount when the temperature of the suspension motor 102 is low, and the heat dissipation amount increases when the temperature of the suspension motor 102 is high. The second cooling branch 100 can adapt to the operating conditions of the vehicle under various road conditions. Moreover, the first cooling medium in the second cooling branch 100 increases the heat capacity of the second cooling branch 100, thereby increasing the maintenance time of the vehicle's suspension system under harsh conditions. In addition, the suspension auxiliary liquid tank 104 can adopt a circulating auxiliary liquid tank, and all the first cooling medium in the suspension auxiliary liquid tank 104 participates in the second cooling branch 100, effectively increasing the heat capacity of the second cooling branch 100.

[0099] In some embodiments, when there is enough space in the vehicle interior, the suspension auxiliary liquid tank 104 can be arranged at a position higher than the shock absorber tower top of the suspension system so that the suspension auxiliary liquid tank 104 can discharge the gas in the first cooling medium.

[0100] In some embodiments, when there is insufficient space in the vehicle interior, the suspension auxiliary liquid tank 104 can be arranged at a lower position, and a bubble separator 105 can be added to the second cooling branch 100 to utilize the cyclone separation performance of the bubble separator 105 to separate the gas in the first cooling medium. Therefore, as Figure 2 shown, the second cooling branch 100 can further include: a bubble separator 105, and the bubble separator 105 is used to separate the gas and liquid in the first cooling medium of the second cooling branch 100 to achieve low-position exhaust and ensure the efficient operation of the second cooling branch 100.

[0101] In some embodiments, the suspension motor 102 can be composed of multiple suspension motors. The number of suspension motors is not limited in the embodiments of the present application, and the cooling method of the suspension system provided in the embodiments of the present application can be applied to vehicles with multiple suspension motors.

[0102] Exemplarily, generally, the suspension system of a vehicle includes a front suspension and a rear suspension, which are arranged in the front compartment and the rear compartment of the vehicle. The front suspension and the rear suspension are respectively composed of left and right suspensions, that is, the number of suspension motors is 4. Figure 3 The connection methods of multiple suspension motors will be introduced by taking 4 suspension motors as an example, such as Figure 3 shown, the suspension motor 102 includes: a first suspension motor 1021, a second suspension motor 1022, a third suspension motor 1023, and a fourth suspension motor 1024. According to the different requirements of multiple suspension motors for the flow rate, pressure difference, and heat dissipation of the first cooling medium, multiple suspension motors can be arranged in series ( Figure 3 Figure a in), in parallel after being connected in series in pairs ( Figure 3 Figure b in), and in parallel ( Figure 3 Figure c in) in three forms.

[0103] It should be noted that the embodiments of the present application do not limit the connection methods of multiple suspension motors. Figure 3 Only the common connection methods of suspension motors are shown as examples in, and multiple suspension motors can also be connected in other ways, as long as the connection methods of multiple suspension motors meet the heat dissipation requirements of multiple suspension motors.

[0104] In some embodiments, the temperature sensor T1, the temperature sensor T2, the temperature sensor T3, and the temperature sensor T4 are respectively used to collect the motor temperatures of the first suspension motor 1021, the second suspension motor 1022, the third suspension motor 1023, and the fourth suspension motor 1024, and are used to judge the temperature state of the suspension motor.

[0105] It should be noted that the second cooling branch 100 further includes a first regulating valve (not shown in the figure), and the first regulating valve can be connected in series in the second cooling branch 100. The cooling system can adjust the cooling flow rate of the second cooling branch 100 by adjusting the valve opening of the second regulating valve.

[0106] In some embodiments, the cooling system can also cool the suspension controller by setting a first cooling branch. The first cooling branch can belong to the thermal management system of the vehicle. Figure 4 This is a schematic structural diagram of an exemplary first cooling branch provided by the embodiments of the present application, such as Figure 4 shown, the first cooling branch 400 includes: a second liquid pump 401, a first three-way valve 402, a first plate heat exchanger 403, a first connecting member 404, a second three-way valve 405, a first auxiliary liquid tank 406, a first radiator 407, a first cooling fan 408, a third three-way valve 409, a fourth three-way valve 410, a first suspension controller 411, a first power assembly 412, a second suspension controller 413, and a second power assembly 414.

[0107] In some embodiments, the first cooling branch 400 is a loop for circulating a second cooling medium constructed by sequentially connecting a second liquid pump 401, a first three-way valve 402, a first plate heat exchanger 403, a first connector 404, a third three-way valve 409, a fourth three-way valve 410, a first suspension controller 411, and a first powertrain 412. The second cooling medium circulation loop is used to adjust the temperature of the suspension controller.

[0108] In some embodiments, the first cooling branch 400 may also be a loop for circulating a second cooling medium constructed by sequentially connecting a second liquid pump 401, a first three-way valve 402, a first plate heat exchanger 403, a first connector 404, a second three-way valve 405, a first radiator 407, a third three-way valve 409, a fourth three-way valve 410, a first suspension controller 411, and a first powertrain 412.

[0109] In some embodiments, the first cooling branch 400 belongs to the thermal management system of the vehicle's powertrain. By connecting the suspension controller (the first suspension controller 411 and the second suspension controller 413) to the thermal management system of the vehicle's powertrain, on the one hand, heat dissipation of the suspension controller is achieved, and on the other hand, cost is reduced by reusing the cooling branch.

[0110] In some embodiments, the suspension controller and the powertrain can be connected in series or in parallel, and the second liquid pump 401 is commonly used to drive the second cooling medium to flow, and the heat is released through the radiator 407. The first cooling branch does not add new cooling components on the basis of the thermal management system of the vehicle's powertrain and maintains good cooling performance.

[0111] It should be noted that Figure 4 taking the series connection of the suspension controller and the powertrain as an example, the positional relationship between the suspension controller and the powertrain can be adjusted according to the heat dissipation requirements of the suspension controller and the powertrain. For example: the first suspension controller 411 is connected in parallel with the first powertrain 412, the second suspension controller 413 is connected in parallel with the second powertrain 414, or the first suspension controller 411 is arranged in front of the first powertrain 412, and the second suspension controller 413 is arranged in front of the second powertrain 414. The embodiments of the present application do not limit this.

[0112] In some embodiments, the above-mentioned second cooling branch 100 and the first cooling branch 400 can be separately provided, or as described below Figure 5 the second cooling branch 100 and the first cooling branch 400 can be combined through a switching device.

[0113] Figure 5 This is a schematic structural diagram of a parallel connection of an exemplary first cooling branch and a second cooling branch provided by the embodiments of the present application, as Figure 5As shown, the first cooling branch 400 and the second cooling branch 100 are connected by a switching device 501.

[0114] In some embodiments, the switching device 501 is adapted to conduct or cut off the flow path between the second cooling branch 100 and the first cooling branch 400.

[0115] In some embodiments, when the temperature of the cooling medium in the second cooling branch 100 is less than a preset temperature threshold, the switching device 501 can be controlled to cut off the flow path between the first cooling branch 400 and the second cooling branch 100. When the temperature of the cooling medium in the second cooling branch 100 is greater than or equal to the preset temperature threshold, the switching device 501 can be controlled to conduct the flow path between the first cooling branch 400 and the second cooling branch 100.

[0116] In some embodiments, the cooling system can also cool the suspension controller and the suspension motor by providing a third cooling branch. The suspension controller and the suspension motor can be connected in series in the third cooling branch. The third cooling branch can belong to the vehicle's thermal management system.

[0117] Figure 6 The structure diagram of an exemplary third cooling branch provided by the embodiment of the present application is as Figure 6 shown. The third cooling branch 600 includes: a third liquid pump 601, a fifth three-way valve 602, a second plate heat exchanger 603, a second connecting member 604, a sixth three-way valve 605, a second auxiliary liquid tank 606, a second radiator 607, a second cooling fan 608, a seventh three-way valve 609, an eighth three-way valve 610, a front suspension controller 611, a rear suspension controller 612, a front suspension motor 613, a rear suspension motor 614, a front power assembly 615, a rear power assembly 616, a thermal management integration module 617, a component to be cooled 618, a stop valve 619, a compressor 620, a muffler 621, a condenser 622, a liquid storage tank 623, and an expansion valve 624. [[ID=)16]]

[0118] In some embodiments, the third cooling branch 600 is a loop for circulating a third cooling medium constructed by connecting a third liquid pump 601, a fifth three-way valve 602, a second plate heat exchanger 603, a second connecting member 604, a seventh three-way valve 609, an eighth three-way valve 610, a front suspension controller 611, a rear suspension controller 612, a front suspension motor 613, a rear suspension motor 614, a front power assembly 615, and a rear power assembly 616. The third cooling branch 600 is used to adjust the temperatures of the air conditioner, the power assembly, other components to be cooled, and the suspension system. Among them, the power assembly includes: a front power assembly 615 and a rear power assembly 616, and the suspension system includes: a front suspension controller 611, a rear suspension controller 612, a front suspension motor 613, and a rear suspension motor 614.

[0119] In some embodiments, the third cooling branch 600 may also be a loop for circulating the third cooling medium constructed by connecting a third liquid pump 601, a fifth three-way valve 602, a second plate heat exchanger 603, a second connecting member 604, a sixth three-way valve 605, a second radiator 607, a seventh three-way valve 609, an eighth three-way valve 610, a front suspension controller 611, a rear suspension controller 612, a front suspension motor 613, a rear suspension motor 614, a front power assembly 615, and a rear power assembly 616.

[0120] In some embodiments, the second cooling fan 608 is used to affect the performance of the condenser 622 and the second radiator 607. The condenser 622 is used to release the heat of the third cooling medium in the third cooling branch 600, and the second radiator 607 is used to release the heat of the front power assembly 615, the rear power assembly 616, the front suspension controller 611, the rear suspension controller 612, the front suspension motor 613, the rear suspension motor 614, and the component 618 to be cooled.

[0121] It should be noted that Figure 6 Taking the example of series connection of the suspension controller, suspension motor, and power assembly followed by parallel connection, among which, the front suspension controller 611, the front suspension motor 613, and the front power assembly 615 are connected in series, the rear suspension controller 612, the rear suspension motor 614, and the rear power assembly 616 are connected in series, and the two branches are connected in parallel and then connected in series with the third liquid pump 601 and the second radiator 607. The positional relationship among the suspension controller, suspension motor, and power assembly can be adjusted according to the heat dissipation requirements of the suspension controller, suspension motor, and power assembly. The cooling method for the suspension system provided by the embodiments of the present application is applicable to other series or parallel connection schemes of the suspension controller, suspension motor, and power assembly.

[0122] It should be noted that the above system structure is for more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation to the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the evolution of the system architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0123] In some embodiments, the execution subject of the cooling method for the suspension system provided by the embodiments of the present application may be the suspension system itself, the cooling system of the suspension system, the thermal management system of the vehicle, or the vehicle controller, or any device or equipment such as a vehicle thermal management device that can control the cooling system of the suspension system. There is no limitation in this regard in the embodiments of the present application.

[0124] Figure 7 The following is a cooling method for a suspension system provided by the embodiments of the present application, as Figure 7As shown, the method includes the following steps S701 - S702:

[0125] S701. Obtain the operating conditions of the suspension system.

[0126] Among them, the first operating condition is used to characterize that the suspension motor stops running; the second operating condition is used to characterize that the suspension motor runs under a normal load state; the third operating condition is used to characterize that the suspension motor runs under a high - load state.

[0127] In some embodiments, the operating conditions of the suspension system can be determined according to the working state of the suspension motor.

[0128] When the suspension system of the vehicle is not affected by road excitation, for example, when the vehicle is driving on a flat road surface, the suspension system does not need to adjust the vehicle's suspension, the suspension motor is in a shutdown state, the components of the suspension system stop generating heat, the suspension system has no heat dissipation requirement or a low heat dissipation requirement, and the suspension system is in the first operating condition.

[0129] When the vehicle is affected by road excitation, for example, when the vehicle is driving on an uneven road surface, the suspension system needs to adjust the vehicle's suspension to adapt to the uneven road surface, the suspension motor is in an on - state, the components of the suspension system generate heat due to continuous operation, the suspension system has a heat dissipation requirement, and the suspension system is in the second operating condition.

[0130] When the vehicle is affected by large road excitation, for example, when the vehicle is driving on a rough road surface; or when the suspension motor needs to achieve a special scenario with a large amount of heat generation (including but not limited to lifting, dancing, jumping in place, etc. that require a large amount of energy consumption), the suspension motor is in a high - load operating state, the components of the suspension system generate a large amount of heat due to continuous high - load operation, the suspension system has a large heat dissipation requirement, and the suspension system is in the third operating condition.

[0131] It should be noted that in the context of vehicle comfort control, during the vehicle's driving process, when the suspension system is affected by road excitation, the electronic control unit (ECU) of the suspension system calculates and outputs the thrust data required by the suspension according to the preset suspension control strategy, and transmits the thrust data to the motor control unit (MCU). After receiving the demand thrust signal from the ECU, the MCU starts the motor operation, and through precise control of the current, drives the motor to work according to the demand. During the operation of the motor, due to factors such as internal resistance loss and mechanical friction, heat is generated, resulting in an increase in the motor temperature.

[0132] If the thrust output by the motor is small, or the duration of the thrust is short, the heat generated by the motor is less, and both the temperature of the motor and the temperature of the first cooling medium in the second cooling branch are lower than the low temperature threshold, the first liquid pump operates at the minimum duty cycle. If the thrust output by the motor is large, or the duration of the thrust is long, the motor continuously generates heat, and the temperature of the motor and the first cooling medium continuously rise. When both the temperature of the motor and the first cooling medium exceed the low temperature threshold, the duty cycle of the first liquid pump is linearly adjusted based on the temperature of the motor and the first cooling medium. The corresponding duty cycles are calculated according to the temperature of the motor and the first cooling medium respectively, and the maximum value among them is taken as the actual duty cycle of the liquid pump. When the temperature of the motor or the first cooling medium exceeds the high temperature threshold, in order to ensure the safe and stable operation of the suspension system, the duty cycle of the first liquid pump is adjusted to the maximum value to provide the maximum cooling capacity and reduce the temperature as soon as possible.

[0133] As an implementation of S701: Receive the indication information sent by the suspension controller in the suspension system, and the indication information is used to indicate the operating conditions of the suspension system.

[0134] In some embodiments, the suspension controller in the suspension system can collect the operating state of the suspension motor, and determine the operating conditions of the suspension system based on the operating state of the suspension motor, so as to receive the indication information sent by the suspension controller in the suspension system for indicating the operating conditions of the suspension system.

[0135] Among them, the operating state of the suspension motor includes: on-wave state, off-wave state, and special scenario state. The on-wave state indicates that the suspension motor is operating under normal load conditions, the off-wave state indicates that the suspension motor stops operating, and the special scenario indicates that the suspension motor is operating under high load conditions.

[0136] As another implementation of S701: Obtain the road surface information of the road on which the vehicle is traveling, and determine the operating conditions of the suspension system based on the road surface information.

[0137] In some embodiments, the road surface information of the road on which the vehicle is traveling can be obtained through a radar or a sensor, etc. The flatness of the road on which the vehicle is traveling is judged based on the road surface information, and thus the working state of the suspension motor is determined according to the flatness of the road to determine the operating conditions of the suspension system.

[0138] S702. Based on the operating conditions of the suspension system, control the cooling system to operate according to the suspension motor cooling strategy and / or the suspension controller cooling strategy to achieve the cooling of the suspension system.

[0139] Among them, the suspension motor cooling strategy is to cool the suspension motor based on the temperature of the suspension motor and the temperature of the cooling medium flowing through the suspension motor; the suspension controller cooling strategy is to cool the suspension controller based on the temperature of the suspension controller and the temperature of the cooling medium flowing through the suspension controller.

[0140] In some embodiments, the cooling system may include a first cooling branch and a second cooling branch. Referring to the above Figure 5 , the suspension controller is located in the first cooling branch, and the suspension motor is located in the second cooling branch. The suspension controller cooling strategy is used to adjust the cooling flow rate of the first cooling branch, and the motor controller cooling strategy is used to adjust the cooling flow rate of the second cooling branch.

[0141] Among them, the suspension motor cooling strategy is used to adjust the operating parameters of the first liquid pump and / or the first regulating valve on the second cooling branch to adjust the cooling flow rate of the second cooling branch. The suspension controller cooling strategy is used to adjust the operating parameters of the second liquid pump and / or the second regulating valve on the first cooling branch to adjust the cooling flow rate of the first cooling branch.

[0142] It should be noted that when the first cooling branch and the second cooling branch are in parallel, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, which is used to characterize that the cooling capacity distribution priority of the suspension controller is greater than that of the suspension motor.

[0143] In some embodiments, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle as follows:

[0144] (1) When the temperature of the suspension controller reaches the controller high temperature threshold and the temperature of the suspension motor does not reach the motor high temperature threshold within the first preset duration, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is less than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0145] (2) When the temperature of the suspension controller reaches the controller high temperature threshold and the temperature of the suspension motor reaches the motor high temperature threshold within the first preset duration, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0146] (3) When the temperature of the suspension motor reaches the motor high temperature threshold and the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is greater than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0147] (4) When the temperature of the suspension motor reaches the motor high temperature threshold and the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0148] In some embodiments, the suspension motor can send the temperature of the suspension motor and the operating state of the suspension motor to the vehicle control unit (VCU) or the controller of the body domain. The VCU or the controller of the body domain can obtain the first cooling medium temperature through a temperature sensor, thereby determining the operating condition of the suspension system based on the operating state of the suspension motor, combining the temperature of the suspension motor and the first cooling medium temperature, determining the suspension motor cooling strategy, and controlling the second cooling branch to operate according to the suspension motor cooling strategy.

[0149] In some embodiments, the suspension controller can send the temperature of the suspension controller and the operating state of the suspension motor to the VCU. The VCU can obtain the second cooling medium temperature through a temperature sensor, thereby determining the operating condition of the suspension system based on the operating state of the suspension motor, combining the temperature of the suspension controller and the second cooling medium temperature, determining the suspension controller cooling strategy, and controlling the first cooling branch to operate according to the suspension controller cooling strategy.

[0150] It should be noted that the suspension motor and the suspension controller can communicate with the VCU or the controller of the body domain through the electronic control unit (ECU) of the suspension system.

[0151] In some embodiments, the cooling system may include a third cooling branch. Referring to the above Figure 6 , the suspension motor and the suspension controller are connected in series and are both located in the third cooling branch. The suspension motor cooling strategy and the suspension controller cooling strategy are combined into a combined cooling strategy, and the combined cooling strategy is used to adjust the third liquid pump related to the third cooling branch to adjust the cooling flow rate of the third cooling branch.

[0152] In some embodiments, the third cooling branch is also connected to the powertrain and / or other components to be cooled. The rotational speed of the third liquid pump is determined according to at least one of the liquid pump rotational speed determined by the cooling strategy of the powertrain and the liquid pump rotational speed determined by the cooling strategy of other components to be cooled, and the liquid pump rotational speed determined by the combined cooling strategy.

[0153] In some embodiments, the first cooling branch and the second cooling branch correspond to different cooling strategies under different operating conditions. The cooling strategies of the first cooling branch and the second cooling branch under different operating conditions are introduced below.

[0154] (1) The suspension motor cooling strategy of the second cooling branch under different operating conditions.

[0155] Figure 8 This is a schematic diagram of the suspension motor cooling strategy corresponding to different operating conditions provided by the embodiments of the present application. As Figure 8As shown, the suspension motor cooling strategy of the second cooling branch under different operating conditions is as follows:

[0156] ① The suspension motor cooling strategy of the second cooling branch under the first operating condition.

[0157] When the motor temperature and the first cooling medium temperature meet the first stop operating condition, control the first liquid pump to stop operating; or,

[0158] When the motor temperature and the first cooling medium temperature do not meet the first stop operating condition, adjust the speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

[0159] Among them, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch. The first stop operating condition includes: the motor temperature is less than the motor low temperature threshold and the first cooling medium temperature is less than the cooling medium low temperature threshold.

[0160] In some embodiments, when the suspension system is in the first operating condition, the suspension motor no longer generates heat, and the cooling strategy of the second cooling branch can be determined based on the motor temperature and the first cooling medium temperature.

[0161] When the motor temperature is less than the motor low temperature threshold and the first cooling medium temperature is less than the cooling medium low temperature threshold, both the motor temperature and the first cooling medium temperature are relatively low, and there is no heat dissipation requirement for the suspension motor. The second cooling branch can be controlled to stop operating.

[0162] When the motor temperature is greater than or equal to the motor low temperature threshold or the first cooling medium temperature is greater than or equal to the cooling medium low temperature threshold, the motor temperature is relatively high or the first cooling medium temperature is relatively high, and there is a heat dissipation requirement for the suspension motor. The speed of the first liquid pump can be adjusted based on the motor temperature and the first cooling medium temperature. The speed of the first liquid pump is proportional to the motor temperature and the first cooling medium temperature. Thus, it is ensured that when the motor temperature is relatively high or the first cooling medium temperature is relatively high after the suspension motor stops rotating, the suspension motor can be fully cooled to avoid affecting the performance of the suspension motor during the next rotation.

[0163] It should be noted that when the suspension motor stops rotating, the operating duration of the second cooling branch can be limited. For example: after the suspension motor stops rotating, when the operating duration of the second cooling branch reaches the first preset operating duration, control the second cooling branch to stop operating to reduce the energy consumption of the whole vehicle. Among them, the first preset operating duration can be determined based on the performance of the suspension motor and the second cooling branch, and the embodiments of the present application do not limit this.

[0164] It should be noted that when the number of suspension motors and / or temperature sensors in the second cooling branch is multiple, the highest temperature among the temperatures of multiple suspension motors is selected as the motor temperature, and the highest temperature collected by multiple temperature sensors is also selected as the first cooling medium temperature.

[0165] ② Cooling strategy for the suspension motor in the second cooling branch under the second operating condition.

[0166] Adjust the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

[0167] In some embodiments, when the suspension system is in the second operating condition, the suspension motor operates normally, and each component of the suspension system will continuously generate heat. The rotation speed of the first liquid pump can be adjusted according to the motor temperature and the first cooling medium temperature to meet the heat dissipation requirements of the suspension motor. Among them, the rotation speed of the first liquid pump is proportional to the motor temperature and the first cooling medium temperature.

[0168] ③ Cooling strategy for the suspension motor in the second cooling branch under the third operating condition.

[0169] When the motor temperature is greater than the motor high-temperature threshold, control the first liquid pump to operate at the maximum rotation speed; or,

[0170] When the motor temperature is less than or equal to the motor high-temperature threshold, adjust the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

[0171] In some embodiments, when the suspension system is in the third operating condition, the heat generation of the suspension motor is relatively high, and the cooling strategy of the second cooling branch can be determined based on the motor temperature.

[0172] When the motor temperature is greater than the motor high-temperature threshold, the motor temperature is too high, and the heat dissipation requirement of the suspension motor is relatively high. The rotation speed of the first liquid pump can be adjusted to the maximum rotation speed, and the first cooling medium in the suspension secondary liquid tank can be controlled to participate in the second cooling branch, so that the first cooling medium in the second cooling branch increases and the circulation speed accelerates, thereby more quickly taking away the heat generated by the suspension motor, so that the second cooling branch can exert the maximum cooling capacity.

[0173] When the motor temperature is less than or equal to the motor high-temperature threshold, the suspension motor has a heat dissipation requirement. The rotation speed of the first liquid pump can be adjusted based on the motor temperature and the first cooling medium temperature to meet the heat dissipation requirements of the suspension motor. Among them, the rotation speed of the first liquid pump is proportional to the motor temperature and the first cooling medium temperature.

[0174] In some embodiments, the steps in the cooling strategies of the second cooling branch under different operating conditions: adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature can be achieved byFigure 9 Implementation of the cooling strategy for the second cooling branch in Figure 9 As shown in

[0175] ① Cooling strategy for the second cooling branch when the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium.

[0176] When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is within the preset motor temperature range, adjust the speed of the first liquid pump based on the corresponding relationship between the motor temperature and the liquid pump speed; or,

[0177] When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is greater than the high-temperature threshold of the motor, adjust the speed of the first liquid pump to the maximum speed; or,

[0178] When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is less than the low-temperature threshold of the motor, adjust the speed of the first liquid pump to the minimum speed.

[0179] Among them, the upper limit value of the preset motor temperature range is the high-temperature threshold of the motor, and the lower limit value of the preset motor temperature range is the low-temperature threshold of the motor.

[0180] In some embodiments, when the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium, the temperature of the first cooling medium is relatively low, and the cooling strategy of the second cooling branch can be determined based on the motor temperature.

[0181] When the motor temperature is within the preset motor temperature range, the motor temperature is relatively high, and the suspension motor has a heat dissipation requirement. The speed of the first liquid pump can be adjusted based on the corresponding relationship between the motor temperature and the liquid pump speed to meet the heat dissipation requirement of the suspension motor. Among them, the corresponding relationship between the motor temperature and the liquid pump speed can be a linear positive correlation, a non-linear positive correlation, or a non-continuous positive correlation. The embodiments of the present application do not limit this.

[0182] When the motor temperature is greater than the high-temperature threshold of the motor, the motor temperature is too high, and the suspension motor has a high heat dissipation requirement. The speed of the first liquid pump can be adjusted to the maximum speed, so that the circulation speed of the first cooling medium in the second cooling branch is accelerated, and the heat generated by the suspension motor can be taken away more quickly.

[0183] When the motor temperature is less than the low-temperature threshold of the motor, the motor temperature is relatively low, and the heat dissipation requirement of the suspension motor is relatively low. The speed of the first liquid pump can be adjusted to the minimum speed. Among them, the minimum speed of the liquid pump can be the speed corresponding to the minimum required flow rate evaluated based on the heat dissipation capacity, or it can be zero.

[0184] ②Cooling strategy of the second cooling branch when the temperature of the first cooling medium is within the preset cooling medium temperature range.

[0185] When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is less than the motor low temperature threshold, adjust the speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the speed of the liquid pump; or,

[0186] When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is within the preset motor temperature range, adjust the speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the speed of the liquid pump, and the relationship between the motor temperature and the speed of the liquid pump; or,

[0187] When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is greater than the motor high temperature threshold, adjust the speed of the first liquid pump to the maximum speed.

[0188] Wherein, the upper limit value of the preset cooling medium temperature range is the cooling medium high temperature threshold, and the lower limit value of the preset cooling medium temperature range is the cooling medium low temperature threshold.

[0189] In some embodiments, when the temperature of the first cooling medium is within the preset cooling medium temperature range, the temperature of the first cooling medium is relatively high, and the cooling strategy of the second cooling branch can be determined based on the temperature of the first cooling medium and the motor temperature.

[0190] When the motor temperature is less than the motor low temperature threshold, the motor temperature is relatively low and the temperature of the first cooling medium is relatively high. It is necessary to dissipate heat from the first cooling medium, and the speed of the first liquid pump can be adjusted based on the corresponding relationship between the temperature of the first cooling medium and the speed of the liquid pump. Among them, the corresponding relationship between the temperature of the first cooling medium and the speed of the liquid pump can be a linear positive correlation corresponding relationship, a non-linear positive correlation corresponding relationship, or a discontinuous positive correlation corresponding relationship. The embodiments of the present application do not limit this.

[0191] When the motor temperature is within the preset motor temperature range, both the motor temperature and the temperature of the first cooling medium are relatively high. It is necessary to dissipate heat from the suspension motor and the first cooling medium. The first speed can be determined based on the corresponding relationship between the motor temperature and the speed of the liquid pump, and the second speed can be determined based on the corresponding relationship between the temperature of the first cooling medium and the speed of the liquid pump. The speed of the first liquid pump is adjusted to the maximum value of the first speed and the second speed. Among them, the maximum value of the first speed and the second speed is the speed that makes the duty cycle of the pulse width modulation (PWM) signal of the suspension motor the largest.

[0192] When the motor temperature is greater than the motor high - temperature threshold, the motor temperature is too high, and the temperature of the first cooling medium is relatively high. There is a high heat - dissipation requirement for the suspension motor. The rotation speed of the first liquid pump can be adjusted to the maximum speed, so that the circulation speed of the first cooling medium in the second cooling branch is accelerated, thereby more quickly taking away the heat generated by the suspension motor.

[0193] ③ The cooling strategy of the second cooling branch when the temperature of the first cooling medium is greater than the high - temperature threshold of the cooling medium.

[0194] When the temperature of the first cooling medium is greater than the high - temperature threshold of the cooling medium, adjust the rotation speed of the first liquid pump to the maximum speed.

[0195] In some embodiments, when the temperature of the first cooling medium is greater than the high - temperature threshold of the cooling medium, the temperature of the first cooling medium is too high, and there is a high heat - dissipation requirement for the suspension motor. Therefore, when the motor temperature is at any temperature, the rotation speed of the first liquid pump is adjusted to the maximum speed, so that the circulation speed of the first cooling medium in the second cooling branch is accelerated, thereby more quickly taking away the heat generated by the suspension motor.

[0196] (2) The cooling strategy of the suspension controller for the first cooling branch under different operating conditions.

[0197] Figure 10 This is a schematic diagram of the cooling strategy of the suspension controller corresponding to different operating conditions provided by the embodiments of the present application. As Figure 10 shown, the cooling strategy of the suspension controller for the first cooling branch under different operating conditions is as follows:

[0198] ① The cooling strategy of the suspension controller for the first cooling branch under the first operating condition.

[0199] When the controller temperature and the temperature of the second cooling medium meet the second stop - running condition, control the second liquid pump to stop running; or,

[0200] When the controller temperature and the temperature of the second cooling medium do not meet the second stop - running condition, adjust the rotation speed of the second liquid pump based on the controller temperature and / or the temperature of the second cooling medium.

[0201] Among them, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch. The second stop - running condition includes: the controller temperature is less than the controller low - temperature threshold and the temperature of the second cooling medium is less than the low - temperature threshold of the cooling medium.

[0202] In some embodiments, when the suspension system is in the first operating state, the suspension controller no longer generates heat, and the cooling strategy of the first cooling branch can be determined based on the controller temperature and the temperature of the second cooling medium.

[0203] When the controller temperature is lower than the controller low - temperature threshold and the second cooling medium temperature is lower than the cooling medium low - temperature threshold, both the controller temperature and the second cooling medium temperature are relatively low, and the suspension controller has no heat dissipation requirement, so the second liquid pump can be controlled to stop running.

[0204] When the controller temperature is greater than or equal to the controller low - temperature threshold or the second cooling medium temperature is greater than or equal to the cooling medium low - temperature threshold, the controller temperature is relatively high or the second cooling medium temperature is relatively high, and the suspension controller has a heat dissipation requirement. The rotation speed of the second liquid pump can be adjusted based on the corresponding relationship between the controller temperature and / or the second cooling medium temperature and the rotation speed of the second liquid pump. Thus, it is ensured that when the controller temperature is relatively high or the second cooling medium temperature is relatively high after the suspension motor stops running, the suspension controller can be fully cooled to avoid affecting the performance of the next operation of the suspension controller. Among them, the controller temperature is positively correlated with the rotation speed of the second liquid pump, and the second cooling medium temperature is positively correlated with the rotation speed of the second liquid pump.

[0205] It should be noted that when the suspension motor stops running, the operation duration of the first cooling branch can be limited. For example, after the suspension motor stops running, when the operation duration of the first cooling branch reaches the second preset operation duration, the first cooling branch is controlled to stop running to reduce the vehicle - wide energy consumption. Among them, the second preset operation duration can be determined based on the performance of the suspension controller and the first cooling branch, and the embodiments of the present application do not limit this.

[0206] It should also be noted that the controller temperature can be the temperature of the semiconductor element on the suspension controller. The semiconductor element can be an insulated gate bipolar transistor (IGBT), silicon carbide (SiC), gallium nitride (GaN), etc. on the suspension controller. The controller temperature is the IGBT temperature, SiC temperature, or GaN temperature, etc., and the embodiments of the present application do not limit this.

[0207] ② The cooling strategy of the suspension controller for the first cooling branch under the second operating condition.

[0208] When the controller temperature and the second cooling medium temperature meet the low - temperature threshold condition, control the second liquid pump to run at the minimum rotation speed; or,

[0209] When the controller temperature and the cooling medium temperature meet the high - temperature threshold condition, control the second liquid pump to run at the maximum rotation speed; or,

[0210] When the controller temperature and the cooling medium temperature do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjust the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature.

[0211] Among them, the low-temperature threshold condition includes: the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold. The high-temperature threshold condition includes: the controller temperature is greater than the controller high-temperature threshold and / or the second cooling medium temperature is greater than the cooling medium high-temperature threshold.

[0212] In some embodiments, when the suspension system is in the second operating condition, the suspension controller has a heat dissipation requirement, and the cooling strategy of the first cooling branch can be determined based on the controller temperature and the second cooling medium temperature.

[0213] When the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold, both the controller temperature and the second cooling medium temperature are relatively low, and the heat dissipation requirement of the suspension controller is relatively low. The rotational speed of the second liquid pump can be adjusted to the minimum rotational speed, so that the circulation speed of the second cooling medium in the first cooling branch is reduced and the heat dissipation efficiency is reduced, so that the first cooling branch exerts the minimum cooling capacity.

[0214] When the controller temperature is greater than the controller high-temperature threshold and / or the second cooling medium temperature is greater than the cooling medium high-temperature threshold, the controller temperature is too high or the second cooling medium temperature is too high, and the heat dissipation requirement of the suspension controller is relatively high. The rotational speed of the second liquid pump can be adjusted to the maximum rotational speed, and all the second cooling medium in the auxiliary liquid tank in the first cooling branch can be controlled to participate in the first cooling branch, so that the second cooling medium in the first cooling branch increases, the circulation speed accelerates, and the heat dissipation efficiency increases, so as to more quickly take away the heat of the suspension controller, so that the first cooling branch exerts the maximum cooling capacity.

[0215] When the controller temperature and the cooling medium temperature do not meet the low-temperature threshold condition and the high-temperature threshold condition, the controller temperature is relatively high or the second cooling medium temperature is relatively high, and the suspension controller has a heat dissipation requirement. The rotational speed of the second liquid pump can be adjusted based on the corresponding relationship between the controller temperature and / or the second cooling medium temperature and the rotational speed of the second liquid pump.

[0216] ③ The cooling strategy of the suspension controller for the first cooling branch under the third operating condition.

[0217] When the controller temperature is greater than the controller high-temperature threshold, control the second liquid pump to operate at the maximum rotational speed; or,

[0218] When the controller temperature is less than or equal to the controller high-temperature threshold, adjust the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature.

[0219] In some embodiments, when the suspension motor is in the third operating condition, the heat generation of the suspension controller is relatively high, and the cooling strategy of the first cooling branch can be determined based on the controller temperature.

[0220] When the controller temperature is greater than the controller high-temperature threshold, the controller temperature is too high and the heat dissipation requirement of the suspension controller is relatively high. The rotation speed of the second liquid pump can be adjusted to the maximum rotation speed, and all the second cooling media in the auxiliary liquid tank in the first cooling branch are controlled to participate in the first cooling branch, so that the second cooling media in the first cooling branch increase, the circulation speed accelerates, and the heat dissipation efficiency increases, thereby more quickly taking away the heat of the suspension controller, so that the first cooling branch exerts the maximum cooling capacity.

[0221] When the controller temperature is less than or equal to the controller high-temperature threshold, the suspension controller has a heat dissipation requirement, and the rotation speed of the second liquid pump can be adjusted based on the corresponding relationship between the controller temperature and / or the second cooling medium temperature and the rotation speed of the second liquid pump to meet the heat dissipation requirement of the suspension motor.

[0222] In some embodiments, the cooling system further includes a cooling fan, and the suspension controller cooling strategy is also used to control the rotation speed of the cooling fan to control the cooling amount of the suspension controller.

[0223] Figure 11 Another schematic diagram of the suspension controller cooling strategy corresponding to different operating conditions provided by the embodiments of the present application is as Figure 11 shown. The suspension controller cooling strategy of the first cooling branch under different operating conditions is as follows:

[0224] ① The suspension controller cooling strategy of the first cooling branch under the first operating condition.

[0225] When the controller temperature and the second cooling medium temperature meet the second stop operating condition, control the cooling fan to stop operating; or,

[0226] When the controller temperature and the second cooling medium temperature do not meet the second stop operating condition, adjust the rotation speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0227] In some embodiments, when the suspension system is in the first operating state, the suspension controller no longer generates heat, and the cooling strategy of the first cooling branch can be determined based on the controller temperature and the second cooling medium temperature.

[0228] When the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold, both the controller temperature and the second cooling medium temperature are relatively low, and the suspension controller has no heat dissipation requirement, and the cooling fan can be controlled to stop operating.

[0229] When the controller temperature is greater than or equal to the controller low - temperature threshold or the second cooling medium temperature is greater than or equal to the cooling medium low - temperature threshold, the controller temperature is relatively high or the second cooling medium temperature is relatively high. The suspension controller has a heat dissipation requirement, and the rotation speed of the cooling fan can be adjusted based on the corresponding relationship between the controller temperature and / or the second cooling medium temperature and the rotation speed of the cooling fan. Thus, it is ensured that when the controller temperature is relatively high or the second cooling medium temperature is relatively high after the suspension motor stops running, the suspension controller can be fully cooled, avoiding affecting the performance of the next operation of the suspension controller. Among them, the controller temperature is positively correlated with the rotation speed of the cooling fan, and the second cooling medium temperature is positively correlated with the rotation speed of the cooling fan.

[0230] ② The cooling strategy of the suspension controller for the first cooling branch under the second operating condition.

[0231] When the controller temperature and the second cooling medium temperature meet the low - temperature threshold condition, control the cooling fan to operate at the minimum rotation speed; or,

[0232] When the controller temperature and the cooling medium temperature meet the high - temperature threshold condition, control the cooling fan to operate at the maximum rotation speed; or,

[0233] When the controller temperature and the cooling medium temperature do not meet the low - temperature threshold condition and the high - temperature threshold condition, adjust the rotation speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0234] In some embodiments, when the suspension system is in the second operating condition, the suspension controller has a heat dissipation requirement, and the cooling strategy of the first cooling branch can be determined based on the controller temperature and the second cooling medium temperature.

[0235] When the controller temperature is less than the controller low - temperature threshold and the second cooling medium temperature is less than the cooling medium low - temperature threshold, both the controller temperature and the second cooling medium temperature are relatively low, and the heat dissipation requirement of the suspension controller is relatively low. The rotation speed of the cooling fan can be adjusted to the minimum rotation speed, so that the circulation speed of the second cooling medium in the first cooling branch is reduced and the heat dissipation efficiency is reduced, so that the first cooling branch exerts the minimum cooling capacity.

[0236] When the controller temperature is greater than the controller high - temperature threshold and / or the second cooling medium temperature is greater than the cooling medium high - temperature threshold, the controller temperature is too high or the second cooling medium temperature is too high. The heat dissipation requirement of the suspension controller is relatively high. The rotation speed of the cooling fan can be adjusted to the maximum rotation speed, so that the first cooling branch exerts the maximum cooling capacity.

[0237] When the controller temperature and the cooling medium temperature do not meet the low-temperature threshold condition and the high-temperature threshold condition, the controller temperature is relatively high or the second cooling medium temperature is relatively high. The suspension controller has a heat dissipation requirement, and the rotation speed of the cooling fan can be adjusted based on the correspondence between the controller temperature and / or the second cooling medium temperature and the rotation speed of the cooling fan.

[0238] ③ The cooling strategy of the suspension controller in the first cooling branch under the third operating condition.

[0239] When the controller temperature is greater than or equal to the controller high-temperature threshold, control the cooling fan to operate at the maximum rotation speed; or,

[0240] When the controller temperature is less than the controller high-temperature threshold, adjust the rotation speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0241] In some embodiments, when the suspension system is in the third operating condition, the heat generation of the suspension controller is relatively high, and the cooling strategy of the first cooling branch can be determined based on the controller temperature.

[0242] When the controller temperature is greater than the controller high-temperature threshold, the controller temperature is too high, and the heat dissipation requirement of the suspension controller is relatively high. The rotation speed of the cooling fan can be adjusted to the maximum rotation speed, so that the first cooling branch exerts the maximum cooling capacity.

[0243] When the controller temperature is less than or equal to the controller high-temperature threshold, the suspension controller has a heat dissipation requirement, and the rotation speed of the cooling fan can be adjusted based on the correspondence between the controller temperature and / or the second cooling medium temperature and the rotation speed of the cooling fan to meet the heat dissipation requirement of the suspension motor.

[0244] In some embodiments, the cooling system further includes a cooling fan. The combined cooling strategy of the third cooling branch is also used to control the rotation speed of the cooling fan to control the cooling amount of the suspension controller and the suspension motor. The cooling strategy of the cooling system is used to adjust the rotation speed of the third liquid pump in the third cooling branch and / or the rotation speed of the cooling fan. The cooling strategy of the third cooling branch is introduced below based on the rotation speed of the third liquid pump and the rotation speed of the cooling fan respectively.

[0245] (1) The cooling fan control strategy of the third cooling branch.

[0246] Figure 12 The following is a schematic diagram of a cooling fan control strategy for the third cooling branch provided by the embodiments of the present application. As Figure 12 shown, the cooling fan control strategy of the third cooling branch is as follows:

[0247] Determine the target fan speed of the cooling fan based on at least one of the fan speeds corresponding to the operating conditions of the air conditioner, the fan speeds corresponding to the operating conditions of the powertrain, and the fan speeds corresponding to the operating conditions of the components to be cooled, as well as the fan speed corresponding to the operating conditions of the suspension system, and control the cooling fan to operate at the target fan speed.

[0248] It should be noted that the vehicle thermal management system includes: a power domain controller (PDC), an air conditioner controller (ACB), a powertrain controller (front end motor control unit / rear end motor control unit, FMCU / RMCU), a suspension controller ECU, and components to be cooled, such as an on-board charger (OBC) and an inertial navigation system (INS). The core controller of the vehicle thermal management system is the PDC, which is used to receive signals from each module and, based on the signals from each module, make a cooling strategy judgment and issue control commands for the third liquid pump and the cooling fan. Among them, the modules that need to be cooled include: ACB, FMCU / RMCU, ECU, and OBC.

[0249] In some embodiments, after OBC, ACB, PDC, FMCU / RMCU, ECU, and INS are powered on / charged and discharged, the PDC respectively receives the operating conditions of the air conditioner, the operating conditions of the powertrain, the operating conditions of the components to be cooled, and the operating conditions of the suspension system sent by OBC, ACB, FMCU / RMCU, and ECU. The operating conditions of the air conditioner include: the air conditioner heat dissipation demand and the temperature of the third cooling medium. The operating conditions of the powertrain include: the IGBT temperature on the motor controller and the motor winding temperature. The operating conditions of the components to be cooled include: the heat dissipation demand of the components to be cooled. The operating conditions of the suspension system include: the IGBT temperature on the suspension controller and the suspension motor winding temperature.

[0250] The PDC judges the state of the discharge main contactor. When the discharge main contactor is in the off state, it controls the cooling fan to stop running. When the discharge main contactor is in the working state, it calculates the fan speeds required for each module, that is, the duty cycle of the cooling fan, based on the operating conditions of the air conditioner, the operating conditions of the powertrain, the operating conditions of the components to be cooled, and the operating conditions of the suspension system, and compares the duty cycle corresponding to the operating conditions of the air conditioner with the duty cycle corresponding to the operating conditions of the components to be cooled, and sends the maximum value of the duty cycle to the speed regulation module. After comprehensive processing, it determines the target fan speed of the cooling fan and issues a fan command to control the cooling fan to operate at the target fan speed.

[0251] It should be noted that when the temperature of the third cooling medium collected by the temperature sensor in the vehicle thermal management system is greater than the cooling temperature threshold, the PDC sends a cooling medium temperature alarm to the INS, and the INS lights up the cooling medium temperature alarm light to remind the user.

[0252] As an example, the requirements for the duty cycle of the cooling fan for the temperature of the third cooling medium, the IGBT temperature and the motor winding temperature on the motor controller, and the IGBT temperature and the suspension motor winding temperature on the suspension controller can be linearly adjusted according to the characteristics of the cooling fan.

[0253] Figure 13 The following is a schematic diagram of the corresponding relationship between the duty cycle and speed of an exemplary cooling fan provided by an embodiment of the present application and temperature, as Figure 13 shown, the relationship between the duty cycle of the cooling fan and temperature is as follows: when the temperature is less than T1, the duty cycle of the cooling fan is D1; when the temperature is between T1 and T2, the duty cycle of the cooling fan linearly increases with the increase of temperature; when the temperature is greater than T2, the duty cycle of the cooling fan is D2. As another example, the relationship between the speed of the two-speed fan and temperature is as follows: when the temperature is between T1 and T2, the speed of the cooling fan is at a low speed; when the temperature is between T2 and T3, the speed of the cooling fan is at a high speed.

[0254] Figure 14 The following is a schematic diagram of the combined cooling strategy corresponding to different operating conditions provided by an embodiment of the present application, as Figure 14 shown, the combined cooling strategy of the third cooling branch under different operating conditions is as follows:

[0255] ① The combined cooling strategy of the third cooling branch under the first operating condition.

[0256] When the controller temperature and the motor temperature meet the third stop operating condition, control the cooling fan to stop running; or,

[0257] When the controller temperature and the motor temperature meet the third stop operating condition, adjust the speed of the cooling fan based on the controller temperature, the temperature of the third cooling medium, and the motor temperature.

[0258] Among them, the third stop operating condition includes: the controller temperature is less than the controller low temperature threshold, and the motor temperature is less than the motor low temperature threshold.

[0259] In some embodiments, when the suspension system is in the first operating state, the suspension controller no longer generates heat, and the combined cooling strategy of the third cooling branch can be determined based on the controller temperature and the motor temperature.

[0260] When the controller temperature is less than the controller low-temperature threshold and the motor temperature is less than the motor low-temperature threshold, both the controller temperature and the motor temperature are relatively low, and there is no heat dissipation requirement for the suspension controller and the suspension motor. The cooling fan can be controlled to stop running.

[0261] When the controller temperature is greater than or equal to the controller low-temperature threshold or the motor temperature is greater than or equal to the motor low-temperature threshold, the controller temperature is relatively high or the motor temperature is relatively high, and there is a heat dissipation requirement for the suspension controller and / or the suspension motor. The rotation speed of the cooling fan can be adjusted based on the controller temperature, the temperature of the third cooling medium, and the motor temperature. Thus, it can be ensured that when the controller temperature is relatively high or the motor temperature is relatively high after the suspension motor stops running, the suspension controller and the suspension motor can be fully cooled, avoiding affecting the performance of the next operation of the suspension system. Among them, the controller temperature is positively correlated with the rotation speed of the cooling fan, the temperature of the second cooling medium is positively correlated with the rotation speed of the cooling fan, and the temperature of the third cooling medium is positively correlated with the rotation speed of the cooling fan.

[0262] ② The combined cooling strategy of the third cooling branch in the second operating condition.

[0263] When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the low-temperature threshold conditions, control the cooling fan to run at the minimum rotation speed; or,

[0264] When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the high-temperature threshold conditions, control the cooling fan to run at the maximum rotation speed; or,

[0265] When the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low-temperature threshold conditions and the high-temperature threshold conditions, adjust the rotation speed of the cooling fan based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0266] Among them, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch. The low-temperature threshold conditions include: the controller temperature is less than the controller low-temperature threshold, the motor temperature is less than the motor low-temperature threshold, and the temperature of the third cooling medium is less than the cooling medium low-temperature threshold; the high-temperature threshold conditions include at least one of the following: the controller temperature is greater than the controller high-temperature threshold, the motor temperature is greater than the motor high-temperature threshold, and the temperature of the third cooling medium is greater than the cooling medium high-temperature threshold.

[0267] In some embodiments, when the suspension system is in the second operating condition, there is a heat dissipation requirement for the suspension controller. The combined cooling strategy of the third cooling branch can be determined based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0268] When the controller temperature is less than the controller low - temperature threshold, the motor temperature is less than the motor low - temperature threshold, and the temperature of the third cooling medium is less than the cooling medium low - temperature threshold, the controller temperature, the motor temperature, and the temperature of the third cooling medium are all relatively low. The heat dissipation requirements of the suspension controller and the suspension motor are relatively low. The rotational speed of the cooling fan can be adjusted to the minimum rotational speed, so that the circulation speed of the third cooling medium in the third cooling branch is reduced and the heat dissipation efficiency is reduced, so that the third cooling branch exerts the minimum cooling capacity.

[0269] When the controller temperature is greater than the controller high - temperature threshold, the motor temperature is greater than the motor high - temperature threshold, or the temperature of the third cooling medium is greater than the cooling medium high - temperature threshold, the controller temperature is too high, the motor temperature is too high, or the temperature of the third cooling medium is too high. The heat dissipation requirements of the suspension controller and the suspension motor are relatively high. The rotational speed of the cooling fan can be adjusted to the maximum rotational speed, so that the third cooling branch exerts the maximum cooling capacity.

[0270] When the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low - temperature threshold conditions and the high - temperature threshold conditions, the controller temperature is relatively high, the motor temperature is relatively high, or the temperature of the third cooling medium is relatively high. There is a heat dissipation requirement for the suspension controller or the suspension motor. The rotational speed of the cooling fan can be adjusted based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0271] ③ The combined cooling strategy of the third cooling branch under the third operating condition.

[0272] When the controller temperature and the motor temperature meet the maximum cooling capacity requirement conditions, control the cooling fan to operate at the maximum rotational speed; or,

[0273] When the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement conditions, adjust the rotational speed of the cooling fan based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0274] Among them, the maximum cooling capacity requirement conditions include: the controller temperature is greater than the controller high - temperature threshold, and the motor temperature is greater than the motor high - temperature threshold.

[0275] In some embodiments, when the suspension system is in the third operating condition, the heat generation of the suspension controller and the suspension motor is relatively high. The combined cooling strategy of the third cooling branch can be determined based on the controller temperature and the motor temperature.

[0276] When the controller temperature is greater than the controller high - temperature threshold and the motor temperature is greater than the motor high - temperature threshold, both the controller temperature and the motor temperature are too high. The heat dissipation requirements of the suspension controller and the suspension motor are relatively high. The rotational speed of the cooling fan can be adjusted to the maximum rotational speed, so that the third cooling branch exerts the maximum cooling capacity.

[0277] When the controller temperature is less than or equal to the controller high - temperature threshold or the motor temperature is less than or equal to the motor high - temperature threshold, there is a heat dissipation requirement for the suspension controller or the suspension motor. The rotation speed of the cooling fan can be adjusted based on the controller temperature, the motor temperature, and the third cooling medium temperature to meet the heat dissipation requirement of the suspension motor.

[0278] In some embodiments, the third cooling branch is also connected to the powertrain and / or other components to be cooled. The rotation speed of the cooling fan is determined based on at least one of the fan rotation speeds determined by the cooling strategy of the powertrain, the fan rotation speeds determined by the cooling strategies of other components to be cooled, the fan rotation speeds determined by the cooling strategy of the air - conditioning system, and the fan rotation speed determined by the combined cooling strategy.

[0279] (2) The control strategy of the third liquid pump in the third cooling branch.

[0280] Figure 15 The following is a schematic diagram of the control strategy of the third liquid pump in the third cooling branch provided by the embodiments of the present application. As Figure 15 shown, the control strategy of the third liquid pump in the third cooling branch is as follows:

[0281] Based on at least one of the liquid pump rotation speeds corresponding to the operating conditions of the powertrain and the liquid pump rotation speeds corresponding to the operating conditions of the components to be cooled, and the liquid pump rotation speed corresponding to the operating conditions of the suspension system, determine the target liquid pump rotation speed of the third liquid pump, and control the third liquid pump to operate at the target liquid pump rotation speed.

[0282] In some embodiments, after OBC, PDC, FMCU / RMCU, ECU, and INS are powered on / charged and discharged, PDC respectively receives the operating conditions of the powertrain, the operating conditions of the components to be cooled, and the operating conditions of the suspension system sent by OBC, FMCU / RMCU, and ECU. PDC judges the state of the discharge main contactor. When the discharge main contactor is in the off state, control the third liquid pump to stop running. When the discharge main contactor is in the working state, calculate the required liquid pump rotation speeds of each module, that is, the duty cycle of the third liquid pump, based on the operating conditions of the powertrain, the operating conditions of the components to be cooled, and the operating conditions of the suspension system, so as to determine the target liquid pump rotation speed of the third liquid pump, and issue a liquid pump command to control the third liquid pump to operate at the target liquid pump rotation speed.

[0283] It should be noted that when the third cooling medium temperature collected by the temperature sensor in the vehicle thermal management system is greater than the cooling temperature threshold, PDC sends a cooling medium temperature alarm to INS, and INS lights up the cooling medium temperature alarm lamp to remind the user.

[0284] As an example, the requirements for the duty cycle of the third liquid pump for the temperature of the third cooling medium, the IGBT temperature and the motor winding temperature on the motor controller, and the IGBT temperature and the suspension motor winding temperature on the suspension controller can be processed by linear speed regulation.

[0285] Figure 16 FIG. is a schematic diagram of the corresponding relationship between the duty cycle and the temperature of an exemplary third liquid pump provided by an embodiment of the present application, as Figure 16 shown, the relationship between the duty cycle of the third liquid pump and the temperature is as follows: when the temperature is less than T1, the duty cycle of the third liquid pump is D1; when the temperature is between T1 and T2, the duty cycle of the third liquid pump linearly increases with the increase of the temperature; when the temperature is greater than T2, the duty cycle of the third liquid pump is D2.

[0286] It should be noted that the control of the cooling fan of the third cooling branch includes: OBC, ACB, PDC, FMCU / RMCU, ECU, and INS. The control of the third liquid pump includes: OBC, PDC, FMCU / RMCU, ECU, and INS. ACB does not participate in the control strategy of the third liquid pump. PDC performs linear speed regulation or stepped speed regulation on the third liquid pump based on the heat dissipation requirements of OBC, PDC, FMCU / RMCU, and ECU.

[0287] Figure 17 FIG. is a schematic diagram of a combined cooling strategy corresponding to another different operating condition provided by an embodiment of the present application, as Figure 17 shown, the combined cooling strategy of the third cooling branch under different operating conditions is as follows:

[0288] ① The combined cooling strategy of the third cooling branch under the first operating condition.

[0289] When the controller temperature and the motor temperature meet the third stop operation condition, control the third liquid pump to stop running; or,

[0290] When the controller temperature and the motor temperature meet the third stop operation condition, adjust the speed of the third liquid pump based on the controller temperature, the temperature of the third cooling medium, and the motor temperature.

[0291] In some embodiments, when the suspension system is in the first operating state, the suspension controller no longer generates heat, and the combined cooling strategy of the third cooling branch can be determined based on the controller temperature and the motor temperature.

[0292] When the controller temperature is less than the controller low temperature threshold and the motor temperature is less than the motor low temperature threshold, both the controller temperature and the motor temperature are relatively low, and there is no heat dissipation requirement for the suspension controller and the suspension motor, and the third liquid pump can be controlled to stop running.

[0293] When the controller temperature is greater than or equal to the controller low-temperature threshold or the motor temperature is greater than or equal to the motor low-temperature threshold, the controller temperature is relatively high or the motor temperature is relatively high. There is a heat dissipation requirement for the suspension controller and / or the suspension motor. The rotational speed of the third liquid pump can be adjusted based on the controller temperature, the temperature of the third cooling medium, and the motor temperature. Thus, it can be ensured that when the controller temperature is relatively high or the motor temperature is relatively high after the suspension motor stops operating, the suspension controller and the suspension motor can be fully cooled, avoiding affecting the performance of the next operation of the suspension system. Among them, the controller temperature is positively correlated with the rotational speed of the third liquid pump, the second cooling medium temperature is positively correlated with the rotational speed of the third liquid pump, and the third cooling medium temperature is positively correlated with the rotational speed of the third liquid pump.

[0294] ② The combined cooling strategy of the third cooling branch in the second operating condition.

[0295] When the controller temperature, the motor temperature, and the third cooling medium temperature meet the low-temperature threshold conditions, control the third liquid pump to operate at the minimum rotational speed; or,

[0296] When the controller temperature, the motor temperature, and the third cooling medium temperature meet the high-temperature threshold conditions, control the third liquid pump to operate at the maximum rotational speed; or,

[0297] When the controller temperature, the motor temperature, and the third cooling medium temperature do not meet the low-temperature threshold conditions and the high-temperature threshold conditions, adjust the rotational speed of the third liquid pump based on the controller temperature, the motor temperature, and the third cooling medium temperature.

[0298] In some embodiments, when the suspension system is in the second operating condition, there is a heat dissipation requirement for the suspension controller. The combined cooling strategy of the third cooling branch can be determined based on the controller temperature, the motor temperature, and the third cooling medium temperature.

[0299] When the controller temperature is less than the controller low-temperature threshold, the motor temperature is less than the motor low-temperature threshold, and the third cooling medium temperature is less than the cooling medium low-temperature threshold, the controller temperature, the motor temperature, and the third cooling medium temperature are all relatively low. The heat dissipation requirements of the suspension controller and the suspension motor are relatively low. The rotational speed of the third liquid pump can be adjusted to the minimum rotational speed, so that the circulation speed of the third cooling medium in the third cooling branch decreases and the heat dissipation efficiency decreases, so that the third cooling branch exerts the minimum cooling capacity.

[0300] When the controller temperature is greater than the controller high-temperature threshold, the motor temperature is greater than the motor high-temperature threshold, or the third cooling medium temperature is greater than the cooling medium high-temperature threshold, the controller temperature is too high, the motor temperature is too high, or the third cooling medium temperature is too high. The heat dissipation requirements of the suspension controller and the suspension motor are relatively high. The rotational speed of the third liquid pump can be adjusted to the maximum rotational speed, so that the third cooling branch exerts the maximum cooling capacity.

[0301] When the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low-temperature threshold condition and the high-temperature threshold condition, the controller temperature is relatively high, the motor temperature is relatively high, or the temperature of the third cooling medium is relatively high. There is a heat dissipation requirement for the suspension controller or the suspension motor. The rotational speed of the third liquid pump can be adjusted based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0302] ③ The combined cooling strategy of the third cooling branch in the third operating condition.

[0303] When the controller temperature and the motor temperature meet the maximum cooling capacity requirement condition, control the third liquid pump to operate at the maximum rotational speed; or,

[0304] When the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement condition, adjust the rotational speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0305] Wherein, the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

[0306] In some embodiments, when the suspension system is in the third operating condition, the suspension controller and the suspension motor generate relatively high heat. The combined cooling strategy of the third cooling branch can be determined based on the controller temperature and the motor temperature.

[0307] When the controller temperature is greater than the controller high-temperature threshold and the motor temperature is greater than the motor high-temperature threshold, both the controller temperature and the motor temperature are too high, and the heat dissipation requirements of the suspension controller and the suspension motor are relatively high. The rotational speed of the third liquid pump can be adjusted to the maximum rotational speed, so that the third cooling branch exerts the maximum cooling capacity.

[0308] When the controller temperature is less than or equal to the controller high-temperature threshold or the motor temperature is less than or equal to the motor high-temperature threshold, there is a heat dissipation requirement for the suspension controller or the suspension motor. The rotational speed of the third liquid pump can be adjusted based on the controller temperature, the motor temperature, and the temperature of the third cooling medium to meet the heat dissipation requirement of the suspension motor.

[0309] In some embodiments, in combination with Figure 7 , such as Figure 18 shown, the cooling method of the suspension system provided by the embodiments of the present application further includes the following step S703:

[0310] S703. When a failure occurs in the cooling system, control the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value.

[0311] In some embodiments, when the first liquid pump in the second cooling branch fails, the heat dissipation capacity of the second cooling branch decreases and cannot meet the high heat dissipation requirements of the suspension motor. The vehicle's VCU or body domain can send a suspension motor thermal management torque limit flag to the ECU of the suspension system. The suspension motor thermal management torque limit flag is used to indicate controlling the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value, thereby limiting the power of the suspension motor and avoiding overheating of the suspension motor, which may cause a reduction in the performance and lifespan of the suspension system. Among them, the power output by the suspension motor can be thrust or torque.

[0312] When the second liquid pump and / or the cooling fan in the first cooling branch fails, the heat dissipation capacity of the first cooling branch decreases and cannot meet the high heat dissipation requirements of the suspension controller. The vehicle's VCU can send a suspension controller thermal management torque limit flag to the ECU of the suspension system. The suspension controller thermal management torque limit flag is used to indicate controlling the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value, thereby limiting the power of the suspension motor to reduce the power of the suspension controller and avoiding overheating of the suspension controller, which may cause a reduction in the performance and lifespan of the suspension system.

[0313] When the third liquid pump and / or the cooling fan in the third cooling branch fails, the heat dissipation capacity of the third cooling branch decreases and cannot meet the high heat dissipation requirements of the suspension controller and the suspension motor. The vehicle's VCU can send a thermal management torque limit flag to the ECU of the suspension system. The thermal management torque limit flag is used to indicate controlling the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value, thereby limiting the power of the suspension motor to reduce the power of the suspension controller and avoiding overheating of the suspension controller and the suspension motor, which may cause a reduction in the performance and lifespan of the suspension system.

[0314] The above mainly introduces the solution of the embodiments of the present application from the perspective of methods. It can be understood that in order to implement the above functions, the cooling device of the suspension system includes at least one of the corresponding hardware structures and software modules for performing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of the present application.

[0315] The embodiments of the present application can divide the functional modules of the cooling device of the suspension system according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0316] Figure 19 FIG. is a schematic structural diagram of a cooling device for a suspension system provided by an embodiment of the present application. The cooling device of the suspension system can execute the cooling method of the suspension system provided by the above method embodiment. As Figure 19 shown, the cooling device 1900 of the suspension system includes: an acquisition module 1901 and a control module 1902.

[0317] The acquisition module 1901 is configured to acquire the operating conditions of the suspension system; the control module 1902 is configured to control the cooling system to operate according to the suspension motor cooling strategy and / or the suspension controller cooling strategy based on the operating conditions of the suspension system, so as to realize the cooling of the suspension system, where the suspension motor cooling strategy is to cool the suspension motor based on the temperature of the suspension motor and the temperature of the cooling medium flowing through the suspension motor; the suspension controller cooling strategy is to cool the suspension controller based on the temperature of the suspension controller and the temperature of the cooling medium flowing through the suspension controller.

[0318] In some embodiments, the operating conditions include at least one of the following: a first operating condition, a second operating condition, and a third operating condition; where the first operating condition is used to represent that the suspension motor stops running; the second operating condition is used to represent that the suspension motor runs under a normal load state; the third operating condition is used to represent that the suspension motor runs under a high load state.

[0319] In some embodiments, the cooling system includes a first cooling branch and a second cooling branch. The suspension controller is located in the first cooling branch, and the suspension motor is located in the second cooling branch; the suspension controller cooling strategy is used to adjust the cooling flow rate of the first cooling branch; the motor controller cooling strategy is used to adjust the cooling flow rate of the second cooling branch.

[0320] In some embodiments, the suspension motor cooling strategy is used to adjust the working parameters of the first liquid pump and / or the first regulating valve on the second cooling branch to adjust the cooling flow rate of the second cooling branch; the suspension controller cooling strategy is used to adjust the working parameters of the second liquid pump and / or the second regulating valve on the first cooling branch to adjust the cooling flow rate of the first cooling branch.

[0321] In some embodiments, when the first cooling branch and the second cooling branch are in parallel, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, which is used to characterize that the cooling capacity distribution priority of the suspension controller is higher than that of the suspension motor.

[0322] In some embodiments, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: when the temperature of the suspension motor does not reach the motor high temperature threshold within the first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is less than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, when the temperature of the suspension motor reaches the motor high temperature threshold within the first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0323] In some embodiments, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: when the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is greater than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, when the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

[0324] In some embodiments, the cooling system further includes a switching device, which is adapted to conduct or cut off the flow path between the second cooling branch and the first cooling branch.

[0325] In some embodiments, the control module 1902 is further configured to control the switching device to cut off the flow path between the first cooling branch and the second cooling branch when the temperature of the cooling medium in the second cooling branch is less than the preset temperature threshold; and control the switching device to conduct the flow path between the first cooling branch and the second cooling branch when the temperature of the cooling medium in the second cooling branch is greater than or equal to the preset temperature threshold.

[0326] In some embodiments, the suspension motor cooling strategy corresponding to the first operating condition includes: when the motor temperature and the first cooling medium temperature meet the first stop operating condition, controlling the first liquid pump to stop operating; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch; or, when the motor temperature and the first cooling medium temperature do not meet the first stop operating condition, adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

[0327] In some embodiments, the first stop operating condition includes: the motor temperature is less than the motor low temperature threshold and the first cooling medium temperature is less than the cooling medium low temperature threshold.

[0328] In some embodiments, the suspension motor cooling strategy corresponding to the second operating condition includes: adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

[0329] In some embodiments, the suspension motor cooling strategy corresponding to the third operating condition includes: when the motor temperature is greater than the motor high temperature threshold, controlling the first liquid pump to operate at the maximum rotation speed; or, when the motor temperature is less than or equal to the motor high temperature threshold, adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

[0330] In some embodiments, adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature includes: when the first cooling medium temperature is less than or equal to the cooling medium low temperature threshold and the motor temperature is within the preset motor temperature range, adjusting the rotation speed of the first liquid pump based on the corresponding relationship between the motor temperature and the liquid pump rotation speed, the upper limit value of the preset motor temperature range is the motor high temperature threshold, and the lower limit value of the preset motor temperature range is the motor low temperature threshold; or, when the first cooling medium temperature is less than or equal to the cooling medium low temperature threshold and the motor temperature is greater than the motor high temperature threshold, adjusting the rotation speed of the first liquid pump to the maximum rotation speed; or, when the first cooling medium temperature is less than or equal to the cooling medium low temperature threshold and the motor temperature is less than the motor low temperature threshold, adjusting the rotation speed of the first liquid pump to the minimum rotation speed.

[0331] In some embodiments, adjusting the rotation speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature includes: when the first cooling medium temperature is greater than the cooling medium high temperature threshold, adjusting the rotation speed of the first liquid pump to the maximum rotation speed.

[0332] In some embodiments, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the temperature of the first cooling medium includes: when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is less than the motor low-temperature threshold, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump; or, when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is within a preset motor temperature range, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump and the relationship between the motor temperature and the rotational speed of the liquid pump; or, when the temperature of the first cooling medium is within a preset cooling medium temperature range and the motor temperature is greater than the motor high-temperature threshold, adjusting the rotational speed of the first liquid pump to the maximum rotational speed; wherein, the upper limit value of the preset cooling medium temperature range is the cooling medium high-temperature threshold, and the lower limit value of the preset cooling medium temperature range is the cooling medium low-temperature threshold; the upper limit value of the preset motor temperature range is the motor high-temperature threshold, and the lower limit value of the preset motor temperature range is the motor low-temperature threshold.

[0333] In some embodiments, adjusting the rotational speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump and the relationship between the motor temperature and the rotational speed of the liquid pump includes: determining a first rotational speed based on the corresponding relationship between the motor temperature and the rotational speed of the liquid pump; determining a second rotational speed based on the corresponding relationship between the temperature of the first cooling medium and the rotational speed of the liquid pump; and adjusting the rotational speed of the first liquid pump to the maximum value of the first rotational speed and the second rotational speed.

[0334] In some embodiments, the suspension controller cooling strategy corresponding to the first operating condition includes: when the controller temperature and the temperature of the second cooling medium satisfy the second stop operating condition, controlling the second liquid pump to stop operating; wherein, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the temperature of the second cooling medium do not satisfy the second stop operating condition, adjusting the rotational speed of the second liquid pump based on the controller temperature and / or the temperature of the second cooling medium.

[0335] In some embodiments, the suspension controller cooling strategy corresponding to the second operating condition includes: when the controller temperature and the temperature of the second cooling medium satisfy the low-temperature threshold condition, controlling the second liquid pump to operate at the minimum rotational speed; wherein, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the temperature of the cooling medium satisfy the high-temperature threshold condition, controlling the second liquid pump to operate at the maximum rotational speed; or, when the controller temperature and the temperature of the cooling medium do not satisfy the low-temperature threshold condition and the high-temperature threshold condition, adjusting the rotational speed of the second liquid pump based on the controller temperature and / or the temperature of the second cooling medium.

[0336] In some embodiments, the suspension controller cooling strategy corresponding to the third operating condition includes: when the controller temperature is greater than the controller high-temperature threshold, controlling the second liquid pump to operate at the maximum speed; or, when the controller temperature is less than or equal to the controller high-temperature threshold, adjusting the speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

[0337] In some embodiments, adjusting the speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature includes: adjusting the speed of the second liquid pump based on the correspondence between the controller temperature and / or the second cooling medium temperature and the speed of the second liquid pump.

[0338] In some embodiments, the cooling system further includes a cooling fan; the suspension controller cooling strategy is further used to control the speed of the cooling fan to control the cooling amount of the suspension controller.

[0339] In some embodiments, the suspension controller cooling strategy corresponding to the first operating condition includes: when the controller temperature and the second cooling medium temperature meet the second stop operating condition, controlling the cooling fan to stop operating; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the second cooling medium temperature do not meet the second stop operating condition, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0340] In some embodiments, the second stop operating condition includes: the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold.

[0341] In some embodiments, the suspension controller cooling strategy corresponding to the second operating condition includes: when the controller temperature and the second cooling medium temperature meet the low-temperature threshold condition, controlling the cooling fan to operate at the minimum speed; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, when the controller temperature and the cooling medium temperature meet the high-temperature threshold condition, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature and the cooling medium temperature do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

[0342] In some embodiments, the low-temperature threshold conditions include: the controller temperature is less than the controller low-temperature threshold and the second cooling medium temperature is less than the cooling medium low-temperature threshold; the high-temperature threshold conditions include: the controller temperature is greater than the controller high-temperature threshold and / or the second cooling medium temperature is greater than the cooling medium high-temperature threshold.

[0343] In some embodiments, the suspension controller cooling strategy corresponding to the third operating condition includes: when the controller temperature is greater than or equal to the controller high-temperature threshold, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature is less than the controller high-temperature threshold, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

[0344] In some embodiments, adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature includes: adjusting the speed of the cooling fan based on the correspondence between the controller temperature and / or the second cooling medium temperature and the speed of the cooling fan.

[0345] In some embodiments, the cooling system includes a third cooling branch, the suspension motor and the suspension controller are connected in series and are both located in the third cooling branch; the suspension motor cooling strategy and the suspension controller cooling strategy are combined into a combined cooling strategy, and the combined cooling strategy is used to adjust the third liquid pump related to the third cooling branch to adjust the cooling flow rate of the third cooling branch.

[0346] In some embodiments, the combined cooling strategy corresponding to the first operating condition includes: when the controller temperature and the motor temperature meet the third stop operating condition, controlling the third liquid pump to stop running; or, when the controller temperature and the motor temperature meet the third stop operating condition, adjusting the speed of the third liquid pump based on the controller temperature, the third cooling medium temperature and the motor temperature; wherein, the controller temperature is the temperature of the suspension controller, the motor temperature is the temperature of the suspension motor, and the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch.

[0347] In some embodiments, the combined cooling strategy corresponding to the second operating condition includes: when the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the low-temperature threshold condition, controlling the third liquid pump to operate at the minimum speed; where the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, when the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the high-temperature threshold condition, controlling the third liquid pump to operate at the maximum speed; or, when the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjusting the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

[0348] In some embodiments, the combined cooling strategy corresponding to the third operating condition includes: when the controller temperature and the motor temperature meet the maximum cooling capacity requirement condition, controlling the third liquid pump to operate at the maximum speed; or, when the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement condition, adjusting the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium; where the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

[0349] In some embodiments, the cooling system further includes a cooling fan; the combined cooling strategy is further used to control the speed of the cooling fan to control the cooling capacity of the suspension controller and the suspension motor.

[0350] In some embodiments, the combined cooling strategy corresponding to the first operating condition includes: when the controller temperature and the motor temperature meet the third stop operation condition, controlling the cooling fan to stop rotating; or, when the controller temperature and the motor temperature meet the third stop operation condition, adjusting the speed of the cooling fan based on the controller temperature, the temperature of the third cooling medium, and the motor temperature; where the controller temperature is the temperature of the suspension controller, and the motor temperature is the temperature of the suspension motor.

[0351] In some embodiments, the combined cooling strategy corresponding to the second operating condition includes: when the controller temperature, the motor temperature, and the third cooling medium temperature meet the low-temperature threshold conditions, controlling the cooling fan to operate at the minimum speed; wherein, the controller temperature is the temperature of the suspension controller, the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, when the controller temperature, the motor temperature, and the third cooling medium temperature meet the high-temperature threshold conditions, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature, the motor temperature, and the third cooling medium temperature do not meet the low-temperature threshold conditions and the high-temperature threshold conditions, adjusting the speed of the cooling fan based on the controller temperature, the motor temperature, and the third cooling medium temperature.

[0352] In some embodiments, the combined cooling strategy corresponding to the third operating condition includes: when the controller temperature and the motor temperature meet the maximum cooling capacity requirement conditions, controlling the cooling fan to operate at the maximum speed; or, when the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement conditions, adjusting the speed of the cooling fan based on the controller temperature, the motor temperature, and the third cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

[0353] In some embodiments, the third stop operating condition includes: the controller temperature is less than the controller low-temperature threshold, and the motor temperature is less than the motor low-temperature threshold.

[0354] In some embodiments, the low-temperature threshold conditions include: the controller temperature is less than the controller low-temperature threshold, the motor temperature is less than the motor low-temperature threshold, and the third cooling medium temperature is less than the cooling medium low-temperature threshold; the high-temperature threshold conditions include at least one of the following: the controller temperature is greater than the controller high-temperature threshold, the motor temperature is greater than the motor high-temperature threshold, and the third cooling medium temperature is greater than the cooling medium high-temperature threshold.

[0355] In some embodiments, the maximum cooling capacity requirement conditions include: the controller temperature is greater than the controller high-temperature threshold, and the motor temperature is greater than the motor high-temperature threshold.

[0356] In some embodiments, the third cooling branch is further connected to the powertrain and / or other components to be cooled; the speed of the third liquid pump is determined based on at least one of the liquid pump speeds determined by the cooling strategy of the powertrain and the liquid pump speeds determined by the cooling strategies of other components to be cooled, and the liquid pump speed determined by the combined cooling strategy.

[0357] In some embodiments, the third cooling branch is further connected to the powertrain and / or other components to be cooled; the rotational speed of the cooling fan is determined based on at least one of the rotational speed of the fan determined according to the cooling strategy of the powertrain, the rotational speed of the fan determined according to the cooling strategy of other components to be cooled, the rotational speed of the fan determined according to the cooling strategy of the air conditioning system, and the rotational speed of the fan determined according to the combined cooling strategy.

[0358] In some embodiments, the control module 1902 is further configured to control the power output by the suspension motor in the suspension system when a failure occurs in the cooling system, so that the power output by the suspension motor does not exceed a preset value.

[0359] In some embodiments, the acquisition module 1901 is specifically configured to receive the indication information sent by the suspension controller in the suspension system, and the indication information is used to indicate the operating condition of the suspension system.

[0360] In some embodiments, the acquisition module 1901 is specifically configured to acquire the road surface information of the road on which the vehicle travels; based on the road surface information, determine the operating condition of the suspension system.

[0361] When the functions of the above integrated modules are implemented in the form of hardware, an exemplary structure of the electronic device involved in the above embodiments is provided in the embodiments of the present application. As Figure 20 shown, the electronic device 2000 includes: a processor 2002, a bus 2004. Optionally, the electronic device 2000 may further include a memory 2001; optionally, the electronic device 2000 may further include a communication interface 2003.

[0362] The processor 2002 may be used to implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the embodiments of the present application. The processor 2002 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the embodiments of the present application. The processor 2002 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0363] The communication interface 2003 is used to connect to other devices through a communication network. The communication network may be an Ethernet, a wireless access network, a wireless local area network (WLAN), etc.

[0364] The memory 2001 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0365] As a possible implementation, the memory 2001 can exist independently of the processor 2002. The memory 2001 can be connected to the processor 2002 through the bus 2004 for storing instructions or program code. When the processor 2002 calls and executes the instructions or program code stored in the memory 2001, the cooling method of the suspension system provided by the embodiments of the present application can be implemented.

[0366] In another possible implementation, the memory 2001 can also be integrated with the processor 2002.

[0367] The bus 2004 can be an extended industry standard architecture (EISA) bus, etc. The bus 2004 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 20 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0368] Some embodiments of the present application provide a computer-readable storage medium (for example, a non-transitory computer-readable storage medium). Computer program instructions are stored in the computer-readable storage medium. When the computer program instructions run on a computer, the computer is caused to execute the cooling method of the suspension system in any one of the above embodiments.

[0369] Exemplarily, the above computer-readable storage medium may include, but is not limited to: magnetic storage devices (such as hard disks, floppy disks, or magnetic tapes, etc.), optical discs (such as compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (such as erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data).

[0370] An embodiment of this application provides a computer program product containing instructions. When the computer program product runs on a computer, it causes the computer to execute the cooling method of the suspension system in any one of the above embodiments.

[0371] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0372] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A cooling method for a suspension system, characterized in that, The suspension system includes a suspension motor and a suspension controller, and the method includes: Obtaining the operating condition of the suspension system; Based on the operating condition of the suspension system, controlling the cooling system to operate according to the suspension motor cooling strategy and / or the suspension controller cooling strategy to achieve cooling of the suspension system; Wherein, the suspension motor cooling strategy is to cool the suspension motor based on the temperature of the suspension motor and the temperature of the cooling medium flowing through the suspension motor; the suspension controller cooling strategy is to cool the suspension controller based on the temperature of the suspension controller and the temperature of the cooling medium flowing through the suspension controller.

2. The method according to claim 1, wherein The operating condition includes at least one of the following: a first operating condition, a second operating condition, and a third operating condition; Wherein, the first operating condition is used to characterize that the suspension motor stops operating; The second operating condition is used to characterize that the suspension motor operates under a normal load state; The third operating condition is used to characterize that the suspension motor operates under a high load state.

3. The method according to claim 2, wherein The cooling system includes a first cooling branch and a second cooling branch. The suspension controller is located in the first cooling branch, and the suspension motor is located in the second cooling branch; the suspension controller cooling strategy is used to adjust the cooling flow rate of the first cooling branch; the motor controller cooling strategy is used to adjust the cooling flow rate of the second cooling branch.

4. The method according to claim 3, wherein The suspension motor cooling strategy is used to adjust the working parameters of the first liquid pump and / or the first regulating valve on the second cooling branch to adjust the cooling flow rate of the second cooling branch; The suspension controller cooling strategy is used to adjust the working parameters of the second liquid pump and / or the second regulating valve on the first cooling branch to adjust the cooling flow rate of the first cooling branch.

5. The method according to claim 3, characterized in that, When the first cooling branch and the second cooling branch are in parallel, the suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, and the cooling capacity distribution principle is used to characterize that the cooling capacity distribution priority of the suspension controller is greater than that of the suspension motor.

6. The method according to claim 5, wherein The suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: When the temperature of the suspension motor does not reach the motor high temperature threshold within a first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is less than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, When the temperature of the suspension motor reaches the motor high temperature threshold within a first preset duration after the temperature of the suspension controller reaches the controller high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

7. The method according to claim 5, characterized in that, The suspension motor cooling strategy and the suspension controller cooling strategy satisfy the cooling capacity distribution principle, including: When the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is greater than the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy; or, When the temperature of the suspension controller does not reach the controller high temperature threshold within the second preset duration after the temperature of the suspension motor reaches the motor high temperature threshold, the cooling flow rate of the second cooling branch determined by the suspension motor cooling strategy is equal to the cooling flow rate of the first cooling branch determined by the suspension controller cooling strategy.

8. The method according to claim 3, characterized in that The cooling system further includes a switching device, and the switching device is adapted to conduct or cut off the flow path between the second cooling branch and the first cooling branch.

9. The method according to claim 7, wherein The method further includes: When the temperature of the cooling medium in the second cooling branch is less than the preset temperature threshold, controlling the switching device to cut off the flow path between the first cooling branch and the second cooling branch; When the temperature of the cooling medium in the second cooling branch is greater than or equal to the preset temperature threshold, controlling the switching device to conduct the flow path between the first cooling branch and the second cooling branch.

10. The method according to claim 4, characterized in that The suspension motor cooling strategy corresponding to the first operating condition includes: When the motor temperature and the first cooling medium temperature meet the first stop operating condition, controlling the first liquid pump to stop operating; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch; or, When the motor temperature and the first cooling medium temperature do not meet the first stop operating condition, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature.

11. The method according to claim 10, characterized in that, The first stop operating condition includes: the motor temperature is less than the motor low temperature threshold and the first cooling medium temperature is less than the cooling medium low temperature threshold.

12. The method according to claim 4, wherein The suspension motor cooling strategy corresponding to the second operating condition includes: Adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

13. The method according to claim 4, wherein The suspension motor cooling strategy corresponding to the third operating condition includes: When the motor temperature is greater than the motor high temperature threshold, controlling the first liquid pump to operate at the maximum rotational speed; or, When the motor temperature is less than or equal to the motor high temperature threshold, adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature; wherein, the motor temperature is the temperature of the suspension motor, and the first cooling medium temperature is the temperature of the cooling medium in the second cooling branch.

14. The method according to any one of claims 10 to 13, characterized in that, The adjusting the rotational speed of the first liquid pump based on the motor temperature and / or the first cooling medium temperature includes: When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is within the preset motor temperature range, the rotation speed of the first liquid pump is adjusted based on the corresponding relationship between the motor temperature and the liquid pump rotation speed. The upper limit value of the preset motor temperature range is the high-temperature threshold of the motor, and the lower limit value of the preset motor temperature range is the low-temperature threshold of the motor; or, When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is greater than the high-temperature threshold of the motor, the rotation speed of the first liquid pump is adjusted to the maximum rotation speed; or, When the temperature of the first cooling medium is less than or equal to the low-temperature threshold of the cooling medium and the motor temperature is less than the low-temperature threshold of the motor, the rotation speed of the first liquid pump is adjusted to the minimum rotation speed.

15. The method according to any one of claims 10 to 13, characterized in that, The adjusting of the rotation speed of the first liquid pump based on the motor temperature and / or the temperature of the first cooling medium includes: When the temperature of the first cooling medium is greater than the high-temperature threshold of the cooling medium, the rotation speed of the first liquid pump is adjusted to the maximum rotation speed.

16. The method according to any one of claims 10 to 13, characterized in that, The adjusting of the rotation speed of the first liquid pump based on the motor temperature and / or the temperature of the first cooling medium includes: When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is less than the low-temperature threshold of the motor, the rotation speed of the first liquid pump is adjusted based on the relationship between the temperature of the first cooling medium and the liquid pump rotation speed; or, When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is within the preset motor temperature range, the rotation speed of the first liquid pump is adjusted based on the relationship between the temperature of the first cooling medium and the liquid pump rotation speed and the relationship between the motor temperature and the liquid pump rotation speed; or, When the temperature of the first cooling medium is within the preset cooling medium temperature range and the motor temperature is greater than the high-temperature threshold of the motor, the rotation speed of the first liquid pump is adjusted to the maximum rotation speed; Wherein, the upper limit value of the preset cooling medium temperature range is the high-temperature threshold of the cooling medium, and the lower limit value of the preset cooling medium temperature range is the low-temperature threshold of the cooling medium; the upper limit value of the preset motor temperature range is the high-temperature threshold of the motor, and the lower limit value of the preset motor temperature range is the low-temperature threshold of the motor.

17. The method according to claim 16, wherein The adjusting of the rotation speed of the first liquid pump based on the relationship between the temperature of the first cooling medium and the liquid pump rotation speed and the relationship between the motor temperature and the liquid pump rotation speed includes: Determining a first rotation speed based on the corresponding relationship between the motor temperature and the liquid pump rotation speed; Determining a second rotation speed based on the corresponding relationship between the temperature of the first cooling medium and the liquid pump rotation speed; Adjusting the rotation speed of the first liquid pump to the maximum value of the first rotation speed and the second rotation speed.

18. The method according to claim 4, characterized in that, The suspension controller cooling strategy corresponding to the first operating condition includes: When the controller temperature and the temperature of the second cooling medium meet the second stop operating condition, controlling the second liquid pump to stop operating; wherein, the controller temperature is the temperature of the suspension controller, and the temperature of the second cooling medium is the temperature of the cooling medium in the first cooling branch; or, When the controller temperature and the second cooling medium temperature do not meet the second stop running condition, adjust the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature.

19. The method according to claim 4, characterized in that, The suspension controller cooling strategy corresponding to the second operating condition includes: When the controller temperature and the second cooling medium temperature meet the low temperature threshold condition, control the second liquid pump to operate at the minimum rotational speed; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, When the controller temperature and the cooling medium temperature meet the high temperature threshold condition, control the second liquid pump to operate at the maximum rotational speed; or, When the controller temperature and the cooling medium temperature do not meet the low temperature threshold condition and the high temperature threshold condition, adjust the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature.

20. The method according to claim 4, characterized in that The suspension controller cooling strategy corresponding to the third operating condition includes: When the controller temperature is greater than the controller high temperature threshold, control the second liquid pump to operate at the maximum rotational speed; or, When the controller temperature is less than or equal to the controller high temperature threshold, adjust the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

21. The method according to any one of claims 18 to 20, characterized in that, The adjusting the rotational speed of the second liquid pump based on the controller temperature and / or the second cooling medium temperature includes: Adjust the rotational speed of the second liquid pump based on the correspondence between the controller temperature and / or the second cooling medium temperature and the rotational speed of the second liquid pump.

22. The method according to claim 4, characterized in that, The cooling system further includes a cooling fan; the suspension controller cooling strategy is also used to control the rotational speed of the cooling fan to control the cooling amount of the suspension controller.

23. The method according to claim 22, characterized in that, The suspension controller cooling strategy corresponding to the first operating condition includes: When the controller temperature and the second cooling medium temperature meet the second stop running condition, control the cooling fan to stop running; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, When the controller temperature and the second cooling medium temperature do not meet the second stop running condition, adjust the rotational speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

24. The method according to claim 18 or 23, characterized in that, The second stop running condition includes: the controller temperature is less than the controller low temperature threshold and the second cooling medium temperature is less than the cooling medium low temperature threshold.

25. The method according to claim 22, wherein The suspension controller cooling strategy corresponding to the second operating condition includes: When the controller temperature and the second cooling medium temperature meet the low-temperature threshold condition, control the cooling fan to operate at the minimum speed; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch; or, When the controller temperature and the cooling medium temperature meet the high-temperature threshold condition, control the cooling fan to operate at the maximum speed; or, When the controller temperature and the cooling medium temperature do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjust the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature.

26. The method according to claim 19 or 25, characterized in that, The low-temperature threshold condition includes: the controller temperature is less than the controller low threshold and the second cooling medium temperature is less than the cooling medium low threshold; The high-temperature threshold condition includes: the controller temperature is greater than the controller high threshold and / or the second cooling medium temperature is greater than the cooling medium high threshold.

27. The method according to claim 22, wherein The suspension controller cooling strategy corresponding to the third operating condition includes: When the controller temperature is greater than or equal to the controller high threshold, control the cooling fan to operate at the maximum speed; or, When the controller temperature is less than the controller high threshold, adjust the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature; wherein, the controller temperature is the temperature of the suspension controller, and the second cooling medium temperature is the temperature of the cooling medium in the first cooling branch.

28. The method according to any one of claims 23 to 27, characterized in that The adjusting the speed of the cooling fan based on the controller temperature and / or the second cooling medium temperature includes: Adjust the speed of the cooling fan based on the correspondence between the controller temperature and / or the second cooling medium temperature and the speed of the cooling fan.

29. The method according to claim 2, characterized in that, The cooling system includes a third cooling branch, the suspension motor and the suspension controller are connected in series and both are located in the third cooling branch; the suspension motor cooling strategy and the suspension controller cooling strategy are combined into a combined cooling strategy, and the combined cooling strategy is used to adjust the third liquid pump related to the third cooling branch to adjust the cooling flow rate of the third cooling branch.

30. The method according to claim 29, wherein The combined cooling strategy corresponding to the first operating condition includes: When the controller temperature and the motor temperature meet the third stop operating condition, control the third liquid pump to stop running; or, When the controller temperature and the motor temperature meet the third stop operating condition, adjust the speed of the third liquid pump based on the controller temperature, the third cooling medium temperature and the motor temperature; wherein, the controller temperature is the temperature of the suspension controller, the motor temperature is the temperature of the suspension motor, and the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch.

31. The method according to claim 29, wherein The combined cooling strategy corresponding to the second operating condition includes: When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the low-temperature threshold condition, control the third liquid pump to operate at the minimum speed; where the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the high-temperature threshold condition, control the third liquid pump to operate at the maximum speed; or, When the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjust the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

32. The method according to claim 29, wherein The combined cooling strategy corresponding to the third operating condition includes: When the controller temperature and the motor temperature meet the maximum cooling capacity requirement condition, control the third liquid pump to operate at the maximum speed; or, When the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement condition, adjust the speed of the third liquid pump based on the controller temperature, the motor temperature, and the temperature of the third cooling medium; where the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

33. The method according to claim 29, wherein The cooling system further includes a cooling fan; the combined cooling strategy is also used to control the speed of the cooling fan to control the cooling capacity of the suspension controller and the suspension motor.

34. The method according to claim 33, wherein The combined cooling strategy corresponding to the first operating condition includes: When the controller temperature and the motor temperature meet the third stop operating condition, control the cooling fan to stop rotating; or, When the controller temperature and the motor temperature meet the third stop operating condition, adjust the speed of the cooling fan based on the controller temperature, the temperature of the third cooling medium, and the motor temperature; where the controller temperature is the temperature of the suspension controller and the motor temperature is the temperature of the suspension motor.

35. The method according to claim 33, characterized in that, The combined cooling strategy corresponding to the second operating condition includes: When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the low-temperature threshold condition, control the cooling fan to operate at the minimum speed; where the controller temperature is the temperature of the suspension controller, the temperature of the third cooling medium is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor; or, When the controller temperature, the motor temperature, and the temperature of the third cooling medium meet the high-temperature threshold condition, control the cooling fan to operate at the maximum speed; or, When the controller temperature, the motor temperature, and the temperature of the third cooling medium do not meet the low-temperature threshold condition and the high-temperature threshold condition, adjust the speed of the cooling fan based on the controller temperature, the motor temperature, and the temperature of the third cooling medium.

36. The method according to claim 33, characterized in that, The combined cooling strategy corresponding to the third operating condition includes: When the controller temperature and the motor temperature meet the maximum cooling capacity requirement, controlling the cooling fan to operate at the maximum speed; or, When the controller temperature and the motor temperature do not meet the maximum cooling capacity requirement, adjusting the speed of the cooling fan based on the controller temperature, the motor temperature, and the temperature of the third cooling medium; Wherein, the controller temperature is the temperature of the suspension controller, the third cooling medium temperature is the temperature of the cooling medium in the third cooling branch, and the motor temperature is the temperature of the suspension motor.

37. The method according to claim 30 or 34, characterized in that, The third stop operating condition includes: the controller temperature is less than the controller low temperature threshold, and the motor temperature is less than the motor low temperature threshold.

38. The method according to claim 31 or 35, characterized in that, The low temperature threshold condition includes: the controller temperature is less than the controller low temperature threshold, the motor temperature is less than the motor low temperature threshold, and the third cooling medium temperature is less than the cooling medium low temperature threshold; The high temperature threshold condition includes at least one of the following: the controller temperature is greater than the controller high temperature threshold, the motor temperature is greater than the motor high temperature threshold, and the third cooling medium temperature is greater than the cooling medium high temperature threshold.

39. The method according to claim 32 or 36, characterized in that, The maximum cooling capacity requirement condition includes: the controller temperature is greater than the controller high temperature threshold, and the motor temperature is greater than the motor high temperature threshold.

40. The method according to claim 29, wherein The third cooling branch is also connected to the powertrain and / or other components to be cooled; the speed of the third liquid pump is determined according to at least one of the liquid pump speeds determined by the cooling strategy of the powertrain and the liquid pump speeds determined by the cooling strategies of other components to be cooled, and the liquid pump speed determined by the combined cooling strategy.

41. The method according to claim 33, wherein The third cooling branch is also connected to the powertrain and / or other components to be cooled; the speed of the cooling fan is determined according to at least one of the fan speeds determined by the cooling strategy of the powertrain, the fan speeds determined by the cooling strategies of other components to be cooled, the fan speeds determined by the cooling strategy of the air conditioning system, and the fan speed determined by the combined cooling strategy.

42. The method according to claim 1, wherein The method further includes: When the cooling system fails, controlling the power output by the suspension motor in the suspension system so that the power output by the suspension motor does not exceed a preset value.

43. The method according to claim 1, wherein The obtaining of the operating condition of the suspension system includes: Receiving the indication information sent by the suspension controller in the suspension system, and the indication information is used to indicate the operating condition of the suspension system.

44. The method according to claim 1, characterized in that, The obtaining of the operating condition of the suspension system includes: Obtaining the road surface information of the road on which the vehicle travels; Based on the road surface information, determining the operating condition of the suspension system.

45. An electronic device, characterized in that, Includes: A processor and a memory for storing instructions executable by the processor; Wherein, the processor is configured to transmit the required signals and execute the instructions to implement the method according to any one of claims 1 to 44.

46. A computer-readable storage medium, characterized in that Computer instructions are stored on the computer-readable storage medium, and when the computer instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1 to 44.

47. A suspension system, characterized in that, Includes: The electronic device according to claim 45, or the computer-readable storage medium according to claim 46.

48. A vehicle, characterized in that, Comprising: The electronic device according to claim 45, or the computer-readable storage medium according to claim 46, or the suspension system according to claim 47.

49. A computer program product, characterized in that, The computer program product includes computer instructions that, when run on an electronic device, cause the electronic device to perform the method according to any one of claims 1 to 44.

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