A method, device, equipment and medium for heat exchange of power system

Abstract

The present invention proposes a power system heat exchange method, device, equipment and medium, including obtaining the operating parameters and temperature rise power of the hybrid power coupling module; obtaining the coolant parameters and the first coolant flow rate of the coolant layer in the oil cooler module, the lubricating oil parameters and the first lubricating oil flow rate of the lubricating oil layer, and calculating the heat dissipation power of the oil cooler module; calculating the heat loss power of the hybrid power coupling module according to the operating parameters, temperature rise power and heat dissipation power, and determining the coolant flow demand range and lubricating oil flow demand range of the hybrid power coupling module according to the heat loss power; monitoring the hybrid power coupling module to obtain the real-time temperature value, and adjusting the first coolant flow rate and the first lubricating oil flow rate to the coolant flow demand range according to the real-time temperature value, so as to adjust the temperature of the hybrid power coupling module. According to the technical solution of this embodiment, it is possible to effectively control the thermal balance, improve the heat dissipation efficiency, and reduce energy waste.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of automobile power systems, and in particular to a power system heat exchange method, device, equipment and medium. Background Art

[0002] At present, hybrid coupling system is an effective solution to energy conservation and emission reduction in the automotive industry. Hybrid coupling system generally includes key components such as drive motor, clutch, gear, bearing and planetary mechanism. The heat generated by the above key components at different power and different gears needs to be cooled in time to maintain the balance of gearbox oil temperature. However, the hybrid coupling system in the prior art cannot be cooled in time, resulting in a serious temperature rise of the hybrid coupling system, and the efficiency is reduced, resulting in energy waste. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a power system heat exchange method, device, equipment and medium, which can effectively control the thermal balance of the hybrid coupling system, improve efficiency and reduce energy waste.

[0004] In a first aspect, an embodiment of the present invention provides a power system heat exchange method, which is applied to an automobile power system, wherein the automobile power system includes a hybrid power coupling module, an oil cooler module and a temperature monitoring module, wherein the temperature monitoring module is connected to the hybrid power coupling module and the oil cooler module, respectively, wherein the output end of the hybrid power coupling module is connected to the input end of the oil cooler module, and the output end of the oil cooler module is connected to the input end of the hybrid power coupling module, a coolant layer is provided on one side of the oil cooler module, and a lubricating oil layer is provided on the other side of the oil cooler module, and the power system heat exchange method includes:

[0005] Acquiring operating parameters of the hybrid power coupling module and the temperature rise power of the hybrid power coupling module;

[0006] Acquire a coolant parameter and a first coolant flow rate of the coolant layer in the oil cooler module, as well as a lubricating oil parameter and a first lubricating oil flow rate of the lubricating oil layer, and calculate the heat dissipation power of the oil cooler module according to the coolant parameter and the lubricating oil parameter;

[0007] Calculating the heat loss power of the hybrid coupling module according to the operating parameters, the temperature rise power and the heat dissipation power, and determining the coolant flow requirement range and the lubricating oil flow requirement range of the hybrid coupling module according to the heat loss power;

[0008] The temperature monitoring module monitors the real-time temperature of the hybrid power coupling module to obtain a first real-time temperature value, and adjusts the first coolant flow rate and the first lubricating oil flow rate to within the coolant flow rate requirement range and the lubricating oil flow rate requirement range according to the first real-time temperature value to adjust the temperature of the hybrid power coupling module.

[0009] In some embodiments of the present invention, determining the coolant flow requirement range and the lubricating oil flow requirement range of the hybrid coupling module according to the heat loss power includes:

[0010] Acquire a first temperature variation range of the coolant layer and a second temperature variation range of the lubricating oil layer;

[0011] Dividing the first temperature variation range and the second temperature variation range into a plurality of first temperature intervals and a plurality of second temperature intervals;

[0012] Acquire a first inlet temperature value and a first outlet temperature value of the coolant layer, a second inlet temperature value and a second outlet temperature value of the lubricating oil layer, and a plurality of second temperature values ​​and a plurality of third temperature values ​​of a plurality of the first temperature intervals;

[0013] Calculating the heat dissipation power of the oil cooler module according to the first inlet temperature value, the second inlet temperature value, the first outlet temperature value, the second outlet temperature value, a plurality of the second temperature values, and a plurality of the third temperature values;

[0014] The heat of the hybrid coupling module is regulated as a function of the heat dissipation power.

[0015] In some embodiments of the present invention, the coolant layer is provided with a water pump, the lubricating oil layer is provided with an oil pump, and the heat of the hybrid coupling module is adjusted according to the heat dissipation power, including:

[0016] When the first real-time temperature value is higher than a preset first temperature range of the hybrid coupling module, increasing the rotation speeds of the water pump and the oil pump so that the coolant layer and the lubricating oil layer cool the hybrid coupling module;

[0017] When the first real-time temperature value is lower than the first temperature interval, the first inlet temperature value of the coolant layer is adjusted to a third inlet temperature value, so that the coolant in the coolant layer heats the lubricating oil in the lubricating oil layer.

[0018] In some embodiments of the present invention, adjusting the first coolant flow rate and the first lubricating oil flow rate according to the heat dissipation power includes:

[0019] Acquire a first heat, a first specific heat capacity, and a first density of the coolant in the coolant layer;

[0020] Calculate the first coolant flow rate according to the first heat, the first specific heat capacity, the first density, the first inlet temperature value, and the first outlet temperature value;

[0021] Obtaining a second heat, a second specific heat capacity, and a second density of the lubricating oil in the lubricating oil layer;

[0022] The first lubricating oil flow rate is calculated according to the second heat value, the second specific heat capacity, the second density, the second inlet temperature value and the second outlet temperature value.

[0023] In some embodiments of the present invention, the step of adjusting the temperature of the hybrid coupling module comprises:

[0024] Acquire a first thermal power that the hybrid power coupling module can withstand due to temperature rise;

[0025] Calculating the total heat generation power of the hybrid coupling module according to the first heat power and the heat dissipation power;

[0026] Calculating a body temperature rise coefficient of the hybrid coupling module according to the first real-time temperature value and the first thermal power;

[0027] Calculating a heat transfer coefficient of the oil cooler module according to the total heat generation power, the body temperature rise coefficient, the first input temperature, and the second output temperature of the coolant layer;

[0028] The coolant layer and the lubricating oil layer adjust the first real-time temperature value of the hybrid coupling module according to the heat transfer coefficient.

[0029] In some embodiments of the present invention, the calculating the heat loss power of the hybrid coupling module according to the operating parameters, the temperature rise power and the heat dissipation power includes:

[0030] Obtaining a vehicle resistance and a vehicle tire radius of the vehicle power system, and calculating a vehicle wheel end torque according to the vehicle resistance and the vehicle tire radius;

[0031] Obtaining a vehicle test condition speed of the vehicle power system, and calculating a vehicle wheel end speed according to the vehicle tire radius and the vehicle test condition;

[0032] Acquire the total efficiency of the hybrid coupling module and the efficiency of the drive motor in the vehicle power system, and calculate the first loss power of the hybrid coupling module according to the vehicle wheel end torque, the vehicle wheel end speed, the total efficiency and the efficiency of the drive motor;

[0033] Acquire the operating time step of the vehicle power system, and obtain the efficiency of the hybrid power coupling module according to the first loss power and the operating time step;

[0034] Acquire a heat transfer coefficient of the oil cooler module, a first input temperature and a first output temperature of the coolant layer, and calculate the oil cooler heat dissipation power of the oil cooler module according to the heat transfer coefficient, the first input temperature and the first output temperature;

[0035] Obtaining the heat power consumed by the hybrid coupling module to withstand the temperature rise according to the efficiency and the heat dissipation power of the oil cooler;

[0036] Acquiring a temperature rise coefficient of the hybrid coupling module, and obtaining the temperature rise power of the hybrid coupling module according to the heat power consumed by the temperature rise and the temperature rise coefficient;

[0037] The heat loss power is obtained according to the first loss power, the heat dissipation power of the oil cooler and the temperature rise power.

[0038] In some embodiments of the present invention, the coolant layer and the lubricating oil layer adjust the first real-time temperature value of the hybrid coupling module according to the heat transfer coefficient, including:

[0039] Calculating a first difference between the second output temperature and the first input temperature, calculating a first ratio between the total heat generation power and the first difference, and obtaining the heat transfer coefficient;

[0040] When the heat transfer coefficient is higher than a preset first range, controlling the coolant layer to cool the lubricating oil layer and the hybrid coupling module;

[0041] When the heat exchange coefficient is lower than the first range, the lubricating oil layer is controlled to increase the temperature of the cooling liquid layer.

[0042] In a second aspect, an embodiment of the present invention provides a power system heat exchange device, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the power system heat exchange method as described in the first aspect above.

[0043] In a third aspect, an embodiment of the present invention provides an electronic device, comprising the power system heat exchange device as described in the second aspect above.

[0044] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the power system heat exchange method as described in the first aspect above.

[0045] The power system heat exchange method according to the embodiment of the present invention has at least the following beneficial effects:

[0046] Obtain the operating parameters and temperature rise power of the hybrid coupling module; obtain the coolant parameters and the first coolant flow rate of the coolant layer in the oil cooler module, and the lubricant parameters and the first lubricant flow rate of the lubricant layer, and calculate the heat dissipation power of the oil cooler module according to the coolant parameters and the lubricant parameters; calculate the heat loss power of the hybrid coupling module according to the operating parameters, temperature rise power and heat dissipation power, and determine the coolant flow demand range and lubricant flow demand range of the hybrid coupling module according to the heat loss power; the temperature monitoring module monitors the real-time temperature of the hybrid coupling module to obtain the first real-time temperature value, and adjusts the first coolant flow rate and the first lubricant flow rate to the coolant flow demand range and the lubricant flow demand range according to the first real-time temperature value to adjust the temperature of the hybrid coupling module. According to the technical solution of this embodiment, the cooling demand of the automobile power system can be obtained in a timely and accurate manner, and the thermal balance can be effectively controlled to improve the energy heat dissipation efficiency and reduce energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a flow chart of a power system heat exchange method provided by one embodiment of the present invention;

[0048] Figure 2 A flowchart of determining a coolant flow requirement range and a lubricating oil flow requirement range of a hybrid coupling module according to heat loss power provided by an embodiment of the present invention;

[0049] Figure 3 is a flow chart of regulating the heat of a hybrid coupling module according to heat dissipation power provided by an embodiment of the present invention;

[0050] Figure 4 is a flow chart of adjusting a first coolant flow rate and a first lubricating oil flow rate according to heat dissipation power provided by an embodiment of the present invention;

[0051] Figure 5 is a flow chart of adjusting the temperature of a hybrid coupling module provided by an embodiment of the present invention;

[0052] Figure 6 is a flow chart for calculating the heat loss power of a hybrid coupling module provided by one embodiment of the present invention;

[0053] Figure 7is a flow chart of adjusting a first real-time temperature value of a hybrid coupling module provided by an embodiment of the present invention;

[0054] Figure 8 is a structural diagram of a power system heat exchange device provided by another embodiment of the present invention;

[0055] Fig. 9 is a schematic structural diagram of a hybrid power coupling module and a heat exchange module provided by an embodiment of the present invention;

[0056] Fig.10 It is a schematic diagram of the temperature range provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0058] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0060] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0061] Reference Fig. 9An embodiment of the present invention provides a power system heat exchange method, which is applied to an automobile power system. The automobile power system includes a hybrid power coupling module, an oil cooler module and a temperature monitoring module. The temperature monitoring module is connected to the hybrid power coupling module and the oil cooler module respectively, wherein the output end of the hybrid power coupling module is connected to the input end of the oil cooler module, the output end of the oil cooler module is connected to the input end of the hybrid power coupling module, a coolant layer is provided on one side of the oil cooler module, and a lubricating oil layer is provided on the other side of the oil cooler module.

[0062] It should be noted that by effectively controlling the flow of lubricating oil and the flow of coolant, the capacity loss can be reduced from the perspective of hydraulic power, and at the same time, the hybrid coupling module can meet the required cooling effect, so that the hybrid coupling module can operate efficiently, thereby reducing energy loss and improving the overall efficiency of the vehicle power system.

[0063] The control method of the embodiment of the present invention is further described below based on the accompanying drawings.

[0064] Reference Figure 1 , Figure 1 A flow chart of a power system heat exchange method provided in an embodiment of the present invention, the power system heat exchange method includes but is not limited to the following steps:

[0065] Step S11, obtaining the operating parameters and temperature rise power of the hybrid coupling module;

[0066] It should be noted that the operating parameters of the hybrid coupling module include at least vehicle resistance, drive motor efficiency, vehicle test condition speed, vehicle test condition time step, vehicle test condition acceleration, vehicle tire radius and vehicle wheel end speed. The operating parameters of the hybrid coupling module may fluctuate according to different test vehicles, and those skilled in the art may adjust them according to actual test conditions, and this embodiment does not impose specific restrictions.

[0067] Step S12, obtaining a coolant parameter and a first coolant flow rate of a coolant layer in the oil cooler module, and a lubricating oil parameter and a first lubricating oil flow rate of a lubricating oil layer, and calculating the heat dissipation power of the oil cooler module according to the coolant parameter and the lubricating oil parameter;

[0068] It should be noted that the coolant parameters include but are not limited to a first flow rate, a first specific heat capacity and a first density; the lubricating oil parameters include but are not limited to a second flow rate, a second specific heat capacity and a second density.

[0069] Variable resistor S13, calculates the heat loss power of the hybrid coupling module according to the operating parameters, temperature rise power and heat dissipation power, and determines the coolant flow requirement range and lubricating oil flow requirement range of the hybrid coupling module according to the heat loss power;

[0070] It should be noted that by accurately calculating the heat loss power of the hybrid coupling module, the coolant flow and lubricating oil flow in the oil cooler module are adjusted to ensure that the hybrid coupling module maintains an appropriate temperature during operation and avoid overheating or overcooling of the hybrid coupling module.

[0071] Step S14, the temperature monitoring module monitors the real-time temperature of the hybrid coupling module to obtain a first real-time temperature value, and adjusts the first coolant flow rate and the first lubricating oil flow rate to within the coolant flow rate requirement range and the lubricating oil flow rate requirement range according to the first real-time temperature value to adjust the temperature of the hybrid coupling module.

[0072] It should be noted that the temperature monitoring module can monitor the temperature of the hybrid coupling module in real time. When the temperature of the hybrid coupling module is abnormal, it will respond immediately and quickly adjust the temperature of the hybrid coupling module by adjusting the coolant flow and lubricant flow. By accurately adjusting the coolant flow and lubricant flow, it is ensured that the temperature of the hybrid coupling module is always kept within the optimal operating temperature range, thereby improving the working efficiency and performance of the hybrid coupling module.

[0073] It should be noted that in the hybrid coupling module, the energy of different power sources (such as engines and electric motors) is converted and transferred by mechanical or electromagnetic means. During the conversion and transfer process, part of the energy will be converted into heat energy, resulting in an increase in the temperature of the hybrid coupling module. The heat generated after the temperature rises will be transferred to the housing or heat dissipation system of the hybrid coupling module by heat conduction and convection. However, if the heat dissipation is not timely, the heat will accumulate inside the hybrid coupling module, resulting in excessive temperature rise. In order to avoid the occurrence of excessive temperature rise, this embodiment dissipates heat for the hybrid coupling module by setting an oil cooler module, and cools the hybrid coupling module by adjusting the flow rate of coolant and the flow rate of lubricating oil in the oil cooler module, thereby improving the efficiency of the hybrid coupling module.

[0074] In addition, in one embodiment, referring to Figure 2 and Fig.10 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0075] Step S21, obtaining a first temperature variation range of the coolant layer and a second temperature variation range of the lubricating oil layer;

[0076] Step S22, dividing the first temperature variation range and the second temperature variation range into a plurality of first temperature intervals and a plurality of second temperature intervals;

[0077] Step S23, acquiring a first inlet temperature value and a first outlet temperature value of the coolant layer, a second inlet temperature value and a second outlet temperature value of the lubricating oil layer, and a plurality of second temperature values ​​and a plurality of third temperature values ​​of a plurality of first temperature intervals;

[0078] Step S24, calculating the heat dissipation power of the oil cooler module according to the first inlet temperature value, the second inlet temperature value, the first outlet temperature value, the second outlet temperature value, the plurality of second temperature values ​​and the plurality of third temperature values;

[0079] Step S25, regulating the heat of the hybrid coupling module according to the heat dissipation power.

[0080] It should be noted that the first temperature variation range is the temperature variation range of the coolant, and the second temperature variation range is the temperature variation range of the lubricating oil. In this embodiment, the oil cooler module is divided into four sections, and the flow requirements of the coolant and the lubricating oil are calculated in each section; the coolant temperature at the outlet of the oil cooler module is the coolant temperature at the inlet of the next section of the oil cooler module; the lubricating oil temperature at the outlet of the oil cooler module is the lubricating oil temperature at the inlet of the next section of the oil cooler module, until the last section is calculated. Finally, the heat dissipation power of the oil cooler module is obtained, and the heat of the hybrid coupling module is adjusted according to the heat dissipation power.

[0081] It should be noted that by dividing the temperature into four sections and multiple temperature intervals, the temperature changes of the coolant and lubricating oil in the oil cooler module can be monitored more accurately. By using multiple inlet temperature values, multiple outlet temperature values ​​and temperature values ​​in multiple temperature intervals, the heat dissipation power of the oil cooler module can be calculated more accurately. According to the calculated heat dissipation power, the heat of the hybrid coupling module can be accurately adjusted.

[0082] In addition, in one embodiment, referring to Figure 3 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0083] Step S31, when the first real-time temperature value is higher than a preset first temperature range of the hybrid coupling module, increasing the rotation speeds of the water pump and the oil pump so that the coolant layer and the lubricating oil layer cool down the hybrid coupling module;

[0084] Step S32, when the first real-time temperature value is lower than the first temperature interval, adjusting the first inlet temperature value of the cooling liquid layer to a third inlet temperature value, so that the cooling liquid in the cooling liquid layer heats the lubricating oil in the lubricating oil layer.

[0085] It should be noted that when the temperature of the hybrid coupling module is too high, the required coolant flow and lubricating oil flow are calculated to control the rotation speed of the oil pump and the water pump to achieve the flow required for cooling the hybrid coupling module, thereby cooling the hybrid coupling module. When the temperature of the hybrid coupling module is too low, the inlet temperature of the coolant layer is controlled, and in turn the hot coolant is used to heat the lubricating oil in the lubricating oil layer, thereby warming up the vehicle power system as soon as possible.

[0086] In addition, in one embodiment, referring to Figure 4 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0087] Step S41, obtaining a first flow rate, a first specific heat capacity, and a first density of the coolant in the coolant layer;

[0088] Step S42, calculating the first coolant heat according to the first flow rate, the first specific heat capacity, the first density, the first inlet temperature value and the first outlet temperature value;

[0089] Step S43, obtaining a second flow rate, a second specific heat capacity, and a second density of the lubricating oil in the lubricating oil layer;

[0090] Step S44, calculating the first lubricating oil heat according to the second flow rate, the second specific heat capacity, the second density, the second inlet temperature value and the second outlet temperature value.

[0091] It should be noted that the first coolant heat is calculated according to the first flow rate, the first specific heat capacity, the first density, the first inlet temperature value and the first outlet temperature value, and is expressed by the following first formula:

[0092] ;

[0093] in, is the first coolant heat, is the first flow, is the first density, The first specific heat is the first inlet temperature value, is the first outlet temperature value;

[0094] The first lubricating oil heat is calculated according to the second flow rate, the second specific heat capacity, the second density, the second inlet temperature value and the third inlet temperature value, and is expressed by the following second formula:

[0095] ;

[0096] in, is the first lubricating oil heat, is the second flow rate, is the second density, is the second specific heat, is the second inlet temperature value, is the second outlet temperature value.

[0097] It should be noted that, through accurate calculation of the first coolant heat and the first lubricant heat, the coolant flow and the lubricant flow are adjusted until the final coolant heat is equal to the lubricant heat, and the coolant output temperature is equal to the lubricant output temperature, thereby realizing heat exchange of the hybrid coupling module.

[0098] In addition, in one embodiment, referring to Figure 5 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0099] Step S51, obtaining a first thermal power that the hybrid coupling module can withstand due to temperature rise;

[0100] Step S52, calculating the total heat generation power of the hybrid coupling module according to the first heat power and the heat dissipation power;

[0101] Step S53, calculating the body temperature rise coefficient of the hybrid coupling module according to the first real-time temperature value and the first thermal power;

[0102] Step S54, calculating the heat transfer coefficient of the oil cooler module according to the total heat generation power, the body temperature rise coefficient, the first input temperature and the second output temperature of the coolant layer;

[0103] Step S55 : the coolant layer and the lubricating oil layer adjust the first real-time temperature value of the hybrid coupling module according to the heat transfer coefficient.

[0104] It should be noted that the body temperature rise coefficient of the hybrid coupling module is calculated according to the first real-time temperature value and the first thermal power, and is expressed by the following third formula:

[0105] ;

[0106] in, is the body temperature rise coefficient, is the first real-time temperature value, is the first thermal power.

[0107] The heat transfer coefficient of the oil cooler module is calculated according to the total heat generation power, the body temperature rise coefficient, the first input temperature and the second output temperature, and is expressed by the following fourth formula:

[0108] ;

[0109] in, is the heat transfer coefficient, is the total heat generation power, is the first input temperature, is the second output temperature.

[0110] Furthermore, by accurately calculating the heat transfer coefficient, the coolant and lubricant are adjusted to more effectively manage the temperature of the hybrid coupling module, thereby improving the thermal management efficiency of the vehicle power system. By controlling the temperature of the hybrid coupling module, aging and performance degradation caused by overheating can be reduced, thereby extending the life of the hybrid coupling module and reducing unnecessary energy loss.

[0111] In addition, in one embodiment, referring to Figure 6 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0112] Step S61, obtaining the vehicle resistance and the vehicle tire radius of the vehicle power system, and calculating the vehicle wheel end torque according to the vehicle resistance and the vehicle tire radius;

[0113] Step S62, obtaining the vehicle test condition vehicle speed of the vehicle power system, and calculating the vehicle wheel end speed according to the vehicle tire radius and the vehicle test condition;

[0114] Step S63, obtaining the total efficiency of the hybrid coupling module and the efficiency of the drive motor in the vehicle power system, and calculating the first heat loss power of the hybrid coupling module according to the vehicle wheel end torque, the vehicle wheel end speed, the total efficiency and the efficiency of the drive motor;

[0115] Step S64, obtaining the operating time step of the vehicle power system, and obtaining the efficiency of the hybrid power coupling module according to the first loss power and the operating time step;

[0116] Step S65, obtaining a heat transfer coefficient of the oil cooler module, a first input temperature and a first output temperature of the coolant layer, and calculating the oil cooler heat dissipation power of the oil cooler module according to the heat transfer coefficient, the operating time step, the first input temperature and the first output temperature;

[0117] Step S66, obtaining the heat power consumed by the hybrid coupling module to withstand the temperature rise according to the heat efficiency and the heat dissipation power of the oil cooler;

[0118] Step S67, obtaining the temperature rise coefficient of the hybrid coupling module, and obtaining the temperature rise power of the hybrid coupling module according to the heat power consumed by the temperature rise and the temperature rise coefficient;

[0119] Step S68, obtaining the heat loss power according to the first heat loss power, the heat dissipation power of the oil cooler and the temperature rise power.

[0120] It should be noted that the vehicle resistance and the vehicle tire radius can be adjusted according to different test vehicles, and this embodiment does not impose specific limitations. It can be understood by those skilled in the art that the vehicle resistance and the vehicle tire radius can be obtained by actual measurement.

[0121] Specifically, the vehicle wheel end torque is calculated according to the vehicle resistance and the vehicle tire radius, and is expressed by the following fifth formula:

[0122] ;

[0123] in, is the vehicle wheel end torque, is the vehicle resistance, is the vehicle tire radius;

[0124] The vehicle wheel end speed is calculated according to the vehicle tire radius and the vehicle test condition, and is expressed by the following sixth formula:

[0125]

[0126] in, is the vehicle wheel end speed, It is the vehicle test condition;

[0127] The first heat loss power of the hybrid coupling module is calculated and expressed by the following seventh formula:

[0128] ;

[0129] in, is the first heat loss power, is the overall efficiency, is the drive motor efficiency;

[0130] The efficiency of the hybrid coupling module is obtained according to the first loss power and the operating time step, which is expressed by the following eighth formula:

[0131] ;

[0132] in, For efficiency, is the working condition time step;

[0133] The heat dissipation power of the oil cooler module is calculated according to the heat transfer coefficient, the first input temperature and the first output temperature, and is expressed as follows:

[0134] ;

[0135] in, The heat dissipation power of the oil cooler is is the heat transfer coefficient, is the first input temperature, is the second output temperature;

[0136] The temperature rise power of the hybrid coupling module is obtained according to the heat power consumed by the temperature rise and the temperature rise coefficient, which is expressed by the following tenth formula:

[0137] ;

[0138] in, is the temperature rise power, The heat power consumed for temperature rise is is the temperature rise coefficient;

[0139] The heat loss power is obtained according to the first heat loss power, the heat dissipation power of the oil cooler and the temperature rise power, and is expressed by the following eleventh formula:

[0140] ;

[0141] in, is the heat loss power, The heat dissipation power of the oil cooler is is the temperature rise power.

[0142] In addition, in one embodiment, referring to Figure 7 ,exist Figure 1 Step S11 of the illustrated embodiment also includes but is not limited to the following steps:

[0143] Step S71, calculating a first difference between the second output temperature and the first input temperature, calculating a first ratio of the total heat generation power to the first difference, and obtaining a heat transfer coefficient;

[0144] Step S72, when the heat transfer coefficient is higher than a preset first range, controlling the coolant layer to cool the lubricating oil layer and the hybrid coupling module;

[0145] Step S73: when the heat transfer coefficient is lower than the first range, the lubricating oil layer is controlled to increase the temperature of the cooling liquid layer.

[0146] It should be noted that by calculating the first difference between the second output temperature and the first input temperature, the heat generated by the hybrid coupling module during operation can be accurately understood. When the heat transfer coefficient is higher than the preset first range, it indicates that the heat generated by the hybrid coupling module is high and more effective heat dissipation is required. At this time, by controlling the coolant layer to cool the lubricating oil layer and the hybrid coupling module, the system temperature can be quickly reduced to prevent performance degradation or damage caused by overheating. When the heat transfer coefficient is lower than the first range, it indicates that the heat generated by the hybrid coupling module is small. At this time, the lubricating oil layer can be controlled to heat the coolant layer to achieve effective utilization and recovery of energy while maintaining stable operation of the system.

[0147] This embodiment helps to improve the overall efficiency and reliability of the hybrid coupling module through precise temperature control and efficient thermal management. By optimizing the heat exchange process, unnecessary energy loss is reduced, and the energy utilization efficiency of the system is improved. At the same time, the system is kept running within a suitable temperature range, which can extend the service life of the system and reduce the failure rate. By optimizing the thermal management strategy, the energy consumption and emissions of the hybrid coupling module during operation are further reduced.

[0148] like Figure 8 As shown, Figure 8 : is a structural diagram of a power system heat exchange device provided by an embodiment of the present invention. The present invention also provides a power system heat exchange device, including:

[0149] The processor 801 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0150] The memory 802 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 802 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 802, and the processor 801 calls and executes the power system heat exchange method of the embodiment of this application;

[0151] Input / output interface 803, used to implement information input and output;

[0152] Communication interface 804, used to realize communication interaction between the present apparatus and other devices, which can be realized by wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.);

[0153] A bus 805 that transmits information between various components of the device (e.g., the processor 801, the memory 802, the input / output interface 803, and the communication interface 804);

[0154] The processor 801 , the memory 802 , the input / output interface 803 and the communication interface 804 are connected to each other in communication within the device via a bus 805 .

[0155] An embodiment of the present application also provides an electronic device, comprising the power system heat exchange device as described above.

[0156] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned power system heat exchange method is implemented.

[0157] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0158] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0159] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A power system heat exchange method, characterized in that: Applied to an automobile power system, the automobile power system includes a hybrid power coupling module, an oil cooler module and a temperature monitoring module, the temperature monitoring module is connected to the hybrid power coupling module and the oil cooler module respectively, wherein the output end of the hybrid power coupling module is connected to the input end of the oil cooler module, the output end of the oil cooler module is connected to the input end of the hybrid power coupling module, a coolant layer is provided on one side of the oil cooler module, and a lubricating oil layer is provided on the other side of the oil cooler module, and the power system heat exchange method includes: Obtaining operating parameters and temperature rise power of the hybrid power coupling module; Acquire a coolant parameter and a first coolant flow rate of the coolant layer in the oil cooler module, as well as a lubricating oil parameter and a first lubricating oil flow rate of the lubricating oil layer, and calculate the heat dissipation power of the oil cooler module according to the coolant parameter and the lubricating oil parameter; Calculating the heat loss power of the hybrid coupling module according to the operating parameters, the temperature rise power and the heat dissipation power, and determining the coolant flow requirement range and the lubricating oil flow requirement range of the hybrid coupling module according to the heat loss power; The temperature monitoring module monitors the real-time temperature of the hybrid power coupling module to obtain a first real-time temperature value, and adjusts the first coolant flow rate and the first lubricating oil flow rate to within the coolant flow rate requirement range and the lubricating oil flow rate requirement range according to the first real-time temperature value to adjust the temperature of the hybrid power coupling module.

2. The power system heat exchange method according to claim 1, characterized in that: The step of determining the coolant flow requirement range and the lubricating oil flow requirement range of the hybrid coupling module according to the heat loss power includes: Acquire a first temperature variation range of the coolant layer and a second temperature variation range of the lubricating oil layer; Dividing the first temperature variation range and the second temperature variation range into a plurality of first temperature intervals and a plurality of second temperature intervals; Acquire a first inlet temperature value and a first outlet temperature value of the coolant layer, a second inlet temperature value and a second outlet temperature value of the lubricating oil layer, and a plurality of second temperature values ​​and a plurality of third temperature values ​​of the plurality of first temperature intervals; Calculating the heat dissipation power of the oil cooler module according to the first inlet temperature value, the second inlet temperature value, the first outlet temperature value, the second outlet temperature value, the plurality of second temperature values, and the plurality of third temperature values; The heat of the hybrid coupling module is regulated as a function of the heat dissipation power.

3. The power system heat exchange method according to claim 1, characterized in that: The coolant layer is provided with a water pump, the lubricating oil layer is provided with an oil pump, and the temperature of the hybrid coupling module is adjusted, including: When the first real-time temperature value is higher than a preset first temperature range of the hybrid coupling module, increasing the rotation speeds of the water pump and the oil pump so that the coolant layer and the lubricating oil layer cool the hybrid coupling module; When the first real-time temperature value is lower than the first temperature interval, the first inlet temperature value of the coolant layer is adjusted to a third inlet temperature value, so that the coolant in the coolant layer heats the lubricating oil in the lubricating oil layer.

4. The power system heat exchange method according to claim 2, characterized in that: The step of regulating the heat of the hybrid coupling module according to the heat dissipation power includes: Obtaining a first flow rate, a first specific heat capacity, and a first density of the coolant in the coolant layer; Calculate the first coolant heat according to the first flow rate, the first specific heat capacity, the first density, the first inlet temperature value and the first outlet temperature value; Obtaining a second flow rate, a second specific heat capacity, and a second density of the lubricating oil in the lubricating oil layer; The first lubricating oil heat is calculated according to the second flow rate, the second specific heat capacity, the second density, the second inlet temperature value and the second outlet temperature value.

5. The power system heat exchange method according to claim 1, characterized in that: The calculating the heat loss power of the hybrid coupling module according to the operating parameters, the temperature rise power and the heat dissipation power includes: Obtaining a vehicle resistance and a vehicle tire radius of the vehicle power system, and calculating a vehicle wheel end torque according to the vehicle resistance and the vehicle tire radius; Obtaining a vehicle test condition speed of the vehicle power system, and calculating a vehicle wheel end speed according to the vehicle tire radius and the vehicle test condition speed; Acquire the total efficiency of the hybrid coupling module and the efficiency of the drive motor in the vehicle power system, and calculate the first loss power of the hybrid coupling module according to the vehicle wheel end torque, the vehicle wheel end speed, the total efficiency and the efficiency of the drive motor; Acquire the operating time step of the vehicle power system, and obtain the efficiency of the hybrid power coupling module according to the first loss power and the operating time step; Acquire a heat transfer coefficient of the oil cooler module, a first input temperature and a first output temperature of the coolant layer, and calculate the oil cooler heat dissipation power of the oil cooler module according to the heat transfer coefficient, the first input temperature and the first output temperature; Obtaining the heat power consumed by the hybrid coupling module to withstand the temperature rise according to the efficiency and the heat dissipation power of the oil cooler; Acquiring a temperature rise coefficient of the hybrid coupling module, and obtaining the temperature rise power of the hybrid coupling module according to the heat power consumed by the temperature rise and the temperature rise coefficient; The heat loss power is obtained according to the first loss power, the heat dissipation power of the oil cooler and the temperature rise power.

6. A power system heat exchange device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the power system heat exchange method as described in any one of claims 1 to 5.

7. An electronic device, characterized in that: It includes the power system heat exchange device as described in claim 6.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the power system heat exchange method according to any one of claims 1 to 5.

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