CN114136672B - Method and device for testing heat management system of pure electric vehicle and readable storage medium - Google Patents
Method and device for testing heat management system of pure electric vehicle and readable storage medium Download PDFInfo
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- CN114136672B CN114136672B CN202111339861.9A CN202111339861A CN114136672B CN 114136672 B CN114136672 B CN 114136672B CN 202111339861 A CN202111339861 A CN 202111339861A CN 114136672 B CN114136672 B CN 114136672B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention discloses a test method, test equipment and a readable storage medium of a thermal management system of a pure electric vehicle, wherein the test method comprises the following steps: simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle; the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained; and testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature. The problem that the test result is inaccurate and the test cost is high is effectively avoided, the accuracy of the test result is improved, and meanwhile, the test cost is greatly reduced by the conventional test method for the thermal management system, which needs to manually change the temperature of the parts to be temperature-regulated of the real vehicle and operates the thermal management system of the automobile, and then manually roughly judging the temperature change condition of the parts to be temperature-regulated.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a test method and device of a thermal management system of a pure electric automobile and a readable storage medium.
Background
As a new energy automobile, the pure electric automobile only uses a battery pack as a unique power source, the temperature is an important factor influencing the service life of the battery, the service life of the battery can be influenced by the excessively high or excessively low temperature, and when the temperature is higher, the aging speed of the battery material is increased, and the cycle service life is rapidly attenuated; at lower temperatures, the battery charge-discharge capacity decreases, and often operates in a low temperature environment, the battery will experience irreversible capacity fade. In addition, because of the three-electric architecture of the pure electric vehicle, the whole high-voltage system parts have cooling or heating requirements, and the comfortable temperatures of the working parts are different. Therefore, in order to ensure that each part of the vehicle works in the optimal temperature range under different working conditions, the pure electric vehicle often has higher and more complex requirements on the functions of the thermal management system of the pure electric vehicle.
In the production process of the pure electric vehicle, in order to test the function of the thermal management system of the real vehicle, the method adopted at present is to manually change the temperature of the parts to be temperature-regulated of the real vehicle and operate the thermal management system of the vehicle, and then manually roughly judge the temperature change condition of the parts to be temperature-regulated of the vehicle to test whether the function of the thermal management system of the vehicle is normal or not.
Disclosure of Invention
The invention aims to provide a test method, test equipment and a readable storage medium of a thermal management system of a pure electric vehicle, and aims to solve the problem that the test result accuracy of the manual test method of the conventional thermal management system of the pure electric vehicle is low.
In order to achieve the above object, the present invention provides a method for testing a thermal management system of a pure electric vehicle, the method for testing the thermal management system of the pure electric vehicle comprising:
simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle;
the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained;
and testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature.
Optionally, before the step of simulating the first test temperature of the part to be tempered in the pure electric vehicle, the method further comprises:
the actual working temperature of the part to be regulated is divided into different temperature intervals, and the first test temperature is selected from the temperature intervals, wherein the actual working temperature is determined by the specific working condition of the part to be regulated.
Optionally, the step of obtaining the first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature includes:
and acquiring first actual control signals which are output by the controller of the heat management system of the pure electric vehicle and comprise first PWM waves based on the first test temperature, wherein the number of the first PWM waves is N, and the first PWM waves are respectively used for controlling first duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle.
Optionally, the step of testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature includes:
determining a first standard control signal required for adjusting the part to be temperature-adjusted from the first test temperature to a target temperature in a preset mapping table of the thermal management system, wherein the target temperature is an optimal working temperature of the part to be temperature-adjusted preset by the thermal management system;
acquiring a second duty ratio of the first standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
comparing the first duty cycle with the second duty cycle, and obtaining a first difference value between the first duty cycle and the second duty cycle;
if the first difference value is smaller than or equal to a preset value, determining that the thermal management system is normal in function, wherein the preset value is an error range of the preset thermal management system for controlling the duty ratios of N water pumps on the cooling water pipeline when the temperature is regulated;
and if the first difference value is larger than the preset value, determining that the thermal management system is abnormal in function.
Optionally, if the first difference is less than or equal to a preset value, determining that the thermal management system functions normally includes:
if the first difference value is smaller than or equal to a preset value, simulating a second test temperature of the water temperature in the cooling water pipeline of the pure electric vehicle;
simulating a third test temperature of the parts to be temperature-regulated of the pure electric vehicle according to the first test temperature and the running time of the N water pumps at the first duty ratio;
the second test temperature and the third test temperature are sent to the pure electric vehicle thermal management system, and a second actual control signal output by the pure electric vehicle thermal management system based on the second test temperature and the third test temperature is obtained;
and determining that the thermal management system is normal in function according to the second actual control signal.
Optionally, the step of obtaining the second actual control signal output by the thermal management system of the pure electric vehicle based on the second test temperature and the third test temperature includes:
acquiring second actual control signals which are output by the controller of the thermal management system of the pure electric vehicle and comprise N second PWM waves based on the third test temperature, wherein the N second PWM waves are respectively used for controlling third duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle;
and acquiring an actual gear of an electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline, wherein the electronic fan is used for temperature regulation and control of the cooling water pipeline.
Optionally, the step of determining that the thermal management system is functioning properly according to the second actual control signal includes:
determining a second standard control signal for adjusting the part to be temperature-adjusted from the third test temperature to the target temperature in a preset mapping table of the thermal management system;
acquiring a fourth duty ratio of the second standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
acquiring a standard gear of the electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline;
and comparing the third duty cycle with a fourth duty cycle, and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is normal.
Optionally, the step of comparing the third duty cycle with a fourth duty cycle and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is functioning properly includes:
comparing the third duty cycle with the fourth duty cycle to obtain a second difference value of the third duty cycle and the fourth duty cycle;
if the second difference value is smaller than or equal to the preset value and the actual gear of the electronic fan is consistent with the standard gear, determining that the thermal management system is normal in function;
and if the second difference value is larger than the preset value or the actual gear of the electronic fan is inconsistent with the standard gear, determining that the thermal management system is abnormal in function.
The invention also provides test equipment of the thermal management system of the pure electric vehicle, which comprises: the test method comprises the steps of a test method for the heat management system of the pure electric vehicle, wherein the test method comprises a memory, a processor and a test program which is stored in the memory and can run on the processor, and the steps of the test method for the heat management system of the pure electric vehicle are realized when the processor executes the test program.
The invention also provides a readable storage medium, on which a test program is stored, characterized in that the test program, when executed by a processor, implements the steps of the test method for the thermal management system of the pure electric vehicle.
The method simulates the first test temperature of the parts to be temperature-regulated in the pure electric vehicle; the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained; and testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature. The method can accurately simulate the test temperature during testing, accurately judge the effectiveness of the functions of the thermal management system according to the first actual control signal, effectively avoid the problems that the test result is inaccurate and the test cost is high due to the fact that the temperature of the parts to be regulated of the real vehicle needs to be manually changed and the thermal management system of the vehicle is operated, and then roughly judge the temperature change condition of the parts to be regulated through the manual operation, improve the accuracy of the test result and greatly reduce the test cost.
Drawings
FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment according to an embodiment of the present invention;
fig. 2 is a flowchart of a test method of a thermal management system of a pure electric vehicle according to an embodiment of the present invention;
FIG. 3 is a detailed flowchart of the embodiment of step S10 in FIG. 2;
FIG. 4 is a detailed flowchart of the step S30 in FIG. 2;
fig. 5 is a detailed flowchart of the embodiment of step S34 in fig. 4.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or," "and/or," "including at least one of," and the like, as used herein, may be construed as inclusive, or meaning any one or any combination. For example, "including at least one of: A. b, C "means" any one of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C ", again as examples," A, B or C "or" A, B and/or C "means" any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.
It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily occurring in sequence, but may be performed alternately or alternately with other steps or at least a portion of the other steps or stages.
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and also can be mobile terminal equipment with a display function, such as a smart phone, a tablet personal computer, a portable computer and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a test interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. Test interface 1003 may include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the terminal may also include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and so on. Among other sensors, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile terminal is stationary, and the mobile terminal can be used for recognizing the gesture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which are not described herein.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 1 is not limiting of the terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a test interface module, and a thermal management system test program may be included in a memory 1005, which is a type of computer storage medium.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the test interface 1003 is mainly used for connecting a thermal management system of the pure electric vehicle and carrying out data communication with the thermal management system; and the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005 and perform the following operations:
simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle;
the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained;
and testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
before the first temperature testing step of the parts to be regulated in the simulated pure electric vehicle, the method further comprises the following steps:
the actual working temperature of the part to be regulated is divided into different temperature intervals, and the first test temperature is selected from the temperature intervals, wherein the actual working temperature is determined by the specific working condition of the part to be regulated.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
the step of obtaining the first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature comprises the following steps:
and acquiring first actual control signals which are output by the controller of the heat management system of the pure electric vehicle and comprise first PWM waves based on the first test temperature, wherein the number of the first PWM waves is N, and the first PWM waves are respectively used for controlling first duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
the step of testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature comprises the following steps:
determining a first standard control signal required for adjusting the part to be temperature-adjusted from the first test temperature to a target temperature in a preset mapping table of the thermal management system, wherein the target temperature is an optimal working temperature of the part to be temperature-adjusted preset by the thermal management system;
acquiring a second duty ratio of the first standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
comparing the first duty cycle with the second duty cycle, and obtaining a first difference value between the first duty cycle and the second duty cycle;
if the first difference value is smaller than or equal to a preset value, determining that the thermal management system is normal in function, wherein the preset value is an error range of the preset thermal management system for controlling the duty ratios of N water pumps on the cooling water pipeline when the temperature is regulated;
and if the first difference value is larger than the preset value, determining that the thermal management system is abnormal in function.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
and if the first difference value is smaller than or equal to a preset value, determining that the thermal management system functions normally includes:
if the first difference value is smaller than or equal to a preset value, simulating a second test temperature of the water temperature in the cooling water pipeline of the pure electric vehicle;
simulating a third test temperature of the parts to be temperature-regulated of the pure electric vehicle according to the first test temperature and the running time of the N water pumps at the first duty ratio;
the second test temperature and the third test temperature are sent to the pure electric vehicle thermal management system, and a second actual control signal output by the pure electric vehicle thermal management system based on the second test temperature and the third test temperature is obtained;
and determining that the thermal management system is normal in function according to the second actual control signal.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
the step of obtaining the second actual control signal output by the thermal management system of the pure electric vehicle based on the second test temperature and the third test temperature comprises the following steps:
acquiring second actual control signals which are output by the controller of the thermal management system of the pure electric vehicle and comprise N second PWM waves based on the third test temperature, wherein the N second PWM waves are respectively used for controlling third duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle;
and acquiring an actual gear of an electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline, wherein the electronic fan is used for temperature regulation and control of the cooling water pipeline.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
the step of determining that the thermal management system functions normally according to the second actual control signal includes:
determining a second standard control signal for adjusting the part to be temperature-adjusted from the third test temperature to the target temperature in a preset mapping table of the thermal management system;
acquiring a fourth duty ratio of the second standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
acquiring a standard gear of the electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline;
and comparing the third duty cycle with a fourth duty cycle, and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is normal.
Further, the processor 1001 may be configured to call a thermal management system test program stored in the memory 1005, and further perform the following operations:
the step of comparing the third duty cycle with a fourth duty cycle and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is functioning properly includes:
comparing the third duty cycle with the fourth duty cycle to obtain a second difference value of the third duty cycle and the fourth duty cycle;
if the second difference value is smaller than or equal to the preset value and the actual gear of the electronic fan is consistent with the standard gear, determining that the thermal management system is normal in function;
and if the second difference value is larger than the preset value or the actual gear of the electronic fan is inconsistent with the standard gear, determining that the thermal management system is abnormal in function.
Because of the three-electric architecture of the pure electric vehicle, the whole high-voltage system parts have cooling or heating requirements, and the optimal working temperatures of the parts are different. Therefore, in order to ensure that each part of the vehicle works in the optimal temperature range under different working conditions, the pure electric vehicle often has higher and more complex requirements on the functions of the thermal management system of the pure electric vehicle. In the production process of the pure electric vehicle, in order to test the thermal management system of the real vehicle, the parts to be temperature-regulated of the real vehicle are often required to be operated manually to change the test temperature, the thermal management system is operated, the functional effectiveness of the thermal management system is judged by roughly judging the temperature change condition of the parts to be temperature-regulated manually, and the test method has the defects of inaccurate test result and high test cost.
In order to solve the above problems, the present invention provides a test method for a thermal management system of a pure electric vehicle, including: simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle; the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained; and testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature. The test method improves the accuracy of the test result and reduces the test cost.
Referring to fig. 2, the present invention provides a test method for a thermal management system of a pure electric vehicle, where in a first embodiment of the test method, the test method for the thermal management system includes:
step S10, simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle;
the first test temperature refers to the actual working temperature of the parts to be temperature-regulated in different working states and is influenced by the environment temperature and the working state of the vehicle, wherein the parts to be temperature-regulated comprise but are not limited to batteries, chargers, motors and controllers of the pure electric vehicles;
when the functional effectiveness of the thermal management system of the pure electric vehicle is tested, the network equipment simulates signals sent to the thermal management system by the components to be temperature-regulated at a first test temperature to test the functional effectiveness of the thermal management system;
wherein, pure electric vehicles's thermal management system includes: the system comprises a motor cooling system, a battery heating system, a battery heat balance system and the like, and has the functions of automatically adjusting the temperature of parts to be regulated according to driving working conditions and environmental conditions, so that all the parts to be regulated can work in an optimal temperature range; the thermal management system is typically composed of a number of components, including heaters, heat exchangers, fans, electronic water pumps, compressors, sensors, actuators, flow valves, and various plumbing, etc., and a heat transfer fluid; heat transfer fluids include air, coolant, exhaust gas, refrigerant, etc., which cooperate to meet vehicle heat rejection and temperature control requirements;
optionally, step S10, simulating a first test temperature of a part to be tempered in the pure electric vehicle, referring to fig. 3, includes:
step S11, a CAN message format of a temperature signal of the thermal management system of the pure electric vehicle is obtained;
the method comprises the steps of acquiring a communication protocol of a CAN (Controller Area Network ) bus on a pure electric vehicle and a transmitted temperature signal message through network equipment, and analyzing the message to obtain a CAN message format when a thermal management system transmits a temperature signal;
the CAN bus is a serial duplex communication network which effectively supports distributed control or real-time control, the CAN bus is generally adopted as a control bus in the pure electric vehicle, the function of the CAN bus is to realize information exchange among all control units in the vehicle, and the CAN bus in the pure electric vehicle CAN be one or two or more, for example, a pure electric vehicle CAN comprise two types of CAN buses of power CAN and comfort CAN.
Step S12, simulating the CAN message corresponding to the first test temperature signal based on the CAN message format;
step S20, the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained;
transmitting a message corresponding to the first test temperature signal to a controller of a thermal management system through a CAN bus of the pure electric vehicle;
the network equipment is utilized to acquire a first actual control signal output by the thermal management controller based on a first test temperature, wherein the first actual control signal is a control signal at least comprising N PWM (Pulse width modulation ) waves, and can be correspondingly converted into a duty ratio for controlling N water pumps on a cooling water pipeline of the pure electric automobile, and N is a positive integer, so that a first duty ratio controlled by the first actual signal is acquired;
wherein, the duty ratio refers to the proportion of the energizing time relative to the total time in one pulse cycle; the heat management system controls the temperature of a cooling water pipeline in the pure electric vehicle by controlling the duty ratio of the N water pumps, so that the temperature adjustment of the parts to be adjusted is realized, and the parts to be adjusted work in the optimal working temperature range;
step S30, testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature;
the method mainly determines the effectiveness of the functions of the thermal management system by judging whether the thermal management system controller can output a corresponding accurate control signal aiming at an input signal;
in the embodiment, the network equipment is used for simulating the test temperature of the part to be regulated, and the network equipment is used for acquiring the corresponding control signal output by the thermal management system, so that the corresponding accurate control information can be obtained while the test temperature is accurately simulated, the temperature of the part to be regulated is not changed manually, the functional effectiveness of the thermal management system is judged approximately through the change of the temperature, and the accuracy of the test result is improved; meanwhile, the functional effectiveness of the thermal management system is tested without manually running all the real vehicles of the thermal management system to be tested, so that the testing cost is greatly reduced.
Further, in another embodiment of the test method for the thermal management system of the pure electric vehicle of the present invention, step S10, before simulating the first test temperature of the part to be temperature-regulated in the pure electric vehicle, further includes:
the actual working temperature of the part to be regulated is divided into different temperature intervals, and the first test temperature is selected from the temperature intervals, wherein the actual working temperature is determined by the specific working condition of the part to be regulated;
when the first test temperature is selected, some boundary values or rising and falling thresholds of each temperature interval can be selected;
in this embodiment, when the first test temperature is selected and simulated, we can select the boundary value or the rising and falling threshold value of the actual working temperature interval of each part to simulate, which is difficult to change the temperature of the part to be temperature-regulated to a certain determined temperature when testing by a manual method, thereby realizing the coverage test verification effect of more functional requirements.
Further, in another embodiment of the method for testing a thermal management system of a pure electric vehicle according to the present invention, referring to fig. 4, step S30, according to the first actual control signal and the first test temperature, tests the functional validity of the thermal management system of the pure electric vehicle, including:
step S31, determining a first standard control signal required for adjusting the to-be-adjusted component from the first test temperature to a target temperature in a preset mapping table of the thermal management system, wherein the target temperature is an optimal working temperature of the to-be-adjusted component preset by the thermal management system;
the preset mapping table is a mapping relation table of the received input signals and control signals output based on the input signals when the temperature is regulated by the thermal management system controller; the target temperature is an optimal working temperature or an optimal working temperature range of each part to be regulated, which is preset when the thermal management system is designed, and the first standard signal is a control signal at least comprising N PWM wave forms;
step S32, obtaining a second duty ratio of the first standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
step S33, comparing the first duty ratio with the second duty ratio, and obtaining a first difference value between the first duty ratio and the second duty ratio;
step S34, if the first difference value is smaller than or equal to a preset value, determining that the thermal management system is normal in function, wherein the preset value is an error range of N water pumps on the cooling water pipeline when the preset thermal management system regulates the temperature;
when the preset value is the error range allowed by the duty ratios of N water pumps on the cooling water pipeline when the temperature is regulated by the thermal management system during the design of the function of the thermal management system; the preferred value of the error range is not higher than 4%;
step S35, if the first difference is greater than the preset value, determining that the thermal management system is not functioning normally.
In this embodiment, the first difference value between the first duty ratio and the second duty ratio is obtained, so that an error range of the control signal output by the thermal management system when the temperature is regulated can be accurately judged, the accuracy of the test result is improved, and meanwhile, the accuracy requirement of the thermal management system in design can be met.
Further, in another embodiment of the test method for a thermal management system of a pure electric vehicle according to the present invention, referring to fig. 5, step S34, if the first difference is less than or equal to a preset value, determining that the thermal management system functions normally includes:
step S341, simulating a second test temperature of the water temperature in the cooling water pipeline of the pure electric vehicle if the first difference value is smaller than or equal to a preset value;
the second test temperature is simulated for testing the function of indirectly adjusting the temperature of the part to be adjusted by controlling the gear or the rotating speed of an electronic fan in the pure electric vehicle when or after the heat management system adjusts the temperature of the part to be adjusted by controlling the duty ratio of a water pump, wherein the electronic fan is used for adjusting the water temperature in a cooling water pipeline in the pure electric vehicle;
simulating a second test temperature by using an adjustable power supply device, wherein the voltage signal output by a water temperature sensor on a cooling water pipeline of the pure electric vehicle at the second test temperature is simulated, and one of the adjustable power supply devices is preferably a 12V adjustable power supply device;
step S342, simulating a third test temperature of the parts to be temperature-regulated of the pure electric vehicle according to the first test temperature and the running time of the N water pumps at the first duty ratio;
if the thermal management system is tested, and the thermal management system is tested simultaneously by controlling the duty ratio of the water pump and the temperature adjusting function of the electronic fan on the parts to be adjusted, the third test temperature is equal to the first test temperature;
if the temperature of the part to be regulated is regulated by the test thermal management system through controlling the duty ratio of the water pumps after the temperature of the part to be regulated is normal in the test thermal management system, and then the test thermal management system indirectly regulates the temperature of the part to be regulated through controlling the gear or the rotating speed of the electronic fan in the pure electric vehicle, the temperature change of the part to be regulated after the N water pumps on the cooling water pipeline run for a period of time with the first duty ratio when the part to be regulated is at the first test temperature in the actual running process of the vehicle can be simulated, and at the moment, the third test temperature is the temperature of the part to be regulated after the change of the part to be regulated on the basis of the first test temperature;
step S343, transmitting the second test temperature and the third test temperature to the electric vehicle thermal management system, and acquiring a second actual control signal output by the electric vehicle thermal management system based on the second test temperature and the third test temperature;
the second test temperature is obtained by connecting a power line of the adjustable power supply device with a test wire harness of the thermal management system controller, and sending a voltage signal corresponding to the simulated second test temperature to the thermal management system controller, wherein the test wire harness comprises all hardware interfaces of the thermal management system controller led out by using an adapter plate;
the third test temperature is sent to a controller of the thermal management system through a CAN bus of the pure electric vehicle;
the second actual signals at least comprise N control signals in the form of second PWM waves and control signals for controlling the rotating speed or gear of the electronic fan;
optionally, in step S343, the step of obtaining a second actual control signal output by the thermal management system of the blade electric vehicle based on the second test temperature and the third test temperature includes:
acquiring second actual control signals which are output by the controller of the thermal management system of the pure electric vehicle and comprise N second PWM waves based on the third test temperature, wherein the N second PWM waves are respectively used for controlling third duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle;
and acquiring the actual gear of the electronic fan of the pure electric vehicle when the cooling water pipeline is at the second test temperature.
Step S344, determining that the thermal management system is functioning normally according to the second actual control signal.
Optionally, in step S344, the determining that the thermal management system functions normally according to the second actual control signal includes:
determining a second standard control signal for adjusting the part to be temperature-adjusted from the third test temperature to the target temperature in a preset mapping table of the thermal management system;
the second standard signal at least comprises control signals for controlling the duty ratios of N water pumps on the cooling water pipeline and controlling the gear or the rotating speed of the electronic fan;
acquiring a fourth duty ratio of the second standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
acquiring a standard gear of the electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline;
comparing the third duty cycle with a fourth duty cycle, and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is normal;
optionally, the step of comparing the third duty cycle with a fourth duty cycle and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is functioning properly includes:
comparing the third duty cycle with the fourth duty cycle to obtain a second difference value of the third duty cycle and the fourth duty cycle;
if the second difference value is smaller than or equal to the preset value and the actual gear or the rotating speed of the electronic fan is consistent with the standard gear or the rotating speed, determining that the thermal management system is normal in function;
if the second difference value is larger than the preset value or the actual gear or the rotating speed of the electronic fan is inconsistent with the standard gear or the rotating speed, determining that the thermal management system is abnormal in function;
according to the embodiment, through simulating the second test temperature of the water temperature in the cooling water pipeline, the further test of the function of the thermal management system is realized, so that the function of indirectly adjusting the temperature of the parts to be adjusted by controlling the gear or the rotating speed of the electronic fan in the pure electric vehicle can be further tested while or after the function of controlling the duty ratio of the water pump to adjust the temperature of the parts to be adjusted by testing the thermal management system.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (6)
1. The test method of the thermal management system of the pure electric vehicle is characterized by comprising the following steps of:
simulating a first test temperature of a part to be temperature-regulated in the pure electric vehicle;
the first test temperature is sent to the thermal management system of the pure electric vehicle, and a first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature is obtained;
according to the first actual control signal and the first test temperature, testing the functional effectiveness of the thermal management system of the pure electric vehicle;
before the first temperature testing step of the parts to be regulated in the simulated pure electric automobile, the method further comprises the following steps:
dividing the actual working temperature of the part to be temperature-regulated into different temperature intervals, and selecting the first test temperature from each temperature interval, wherein the actual working temperature is determined by the specific working condition of the part to be temperature-regulated;
the step of obtaining the first actual control signal output by the thermal management system of the pure electric vehicle based on the first test temperature comprises the following steps:
acquiring first actual control signals which are output by the controller of the thermal management system of the pure electric vehicle and comprise first PWM waves based on the first test temperature, wherein the number of the first PWM waves is N, and the first PWM waves are respectively used for controlling first duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle;
the step of testing the functional effectiveness of the thermal management system of the pure electric vehicle according to the first actual control signal and the first test temperature comprises the following steps:
determining a first standard control signal required for adjusting the part to be temperature-adjusted from the first test temperature to a target temperature in a preset mapping table of the thermal management system, wherein the target temperature is an optimal working temperature of the part to be temperature-adjusted preset by the thermal management system;
acquiring a second duty ratio of the first standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
comparing the first duty cycle with the second duty cycle, and obtaining a first difference value between the first duty cycle and the second duty cycle;
if the first difference value is smaller than or equal to a preset value, determining that the thermal management system is normal in function, wherein the preset value is an error range of the preset thermal management system for controlling the duty ratios of N water pumps on the cooling water pipeline when the temperature is regulated;
if the first difference value is larger than the preset value, determining that the thermal management system is abnormal in function;
and if the first difference value is smaller than or equal to a preset value, determining that the thermal management system functions normally includes:
if the first difference value is smaller than or equal to a preset value, simulating a second test temperature of the water temperature in the cooling water pipeline of the pure electric vehicle;
simulating a third test temperature of the parts to be temperature-regulated of the pure electric vehicle according to the first test temperature and the running time of the N water pumps at the first duty ratio;
the second test temperature and the third test temperature are sent to the pure electric vehicle thermal management system, and a second actual control signal output by the pure electric vehicle thermal management system based on the second test temperature and the third test temperature is obtained;
and determining that the thermal management system is normal in function according to the second actual control signal.
2. The method for testing a thermal management system of a pure electric vehicle according to claim 1, wherein the step of obtaining a second actual control signal output by the thermal management system of the pure electric vehicle based on the second test temperature and the third test temperature comprises:
acquiring second actual control signals which are output by the controller of the thermal management system of the pure electric vehicle and comprise N second PWM waves based on the third test temperature, wherein the N second PWM waves are respectively used for controlling third duty ratios of N water pumps on a cooling water pipeline of the pure electric vehicle;
and acquiring an actual gear of an electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline, wherein the electronic fan is used for temperature regulation and control of the cooling water pipeline.
3. The method for testing a thermal management system of a pure electric vehicle according to claim 2, wherein the step of determining that the thermal management system is functioning properly according to the second actual control signal includes:
determining a second standard control signal for adjusting the part to be temperature-adjusted from the third test temperature to the target temperature in a preset mapping table of the thermal management system;
acquiring a fourth duty ratio of the second standard control signal to N water pumps on a cooling water pipeline of the pure electric vehicle;
acquiring a standard gear of the electronic fan of the pure electric vehicle at the second test temperature of the cooling water pipeline;
and comparing the third duty cycle with a fourth duty cycle, and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is normal.
4. The method for testing a thermal management system of a pure electric vehicle according to claim 3, wherein the step of comparing the third duty cycle with a fourth duty cycle and comparing the actual gear of the electronic fan with a standard gear to determine that the thermal management system is functioning properly comprises:
comparing the third duty cycle with the fourth duty cycle to obtain a second difference value of the third duty cycle and the fourth duty cycle;
if the second difference value is smaller than or equal to the preset value and the actual gear of the electronic fan is consistent with the standard gear, determining that the thermal management system is normal in function;
and if the second difference value is larger than the preset value or the actual gear of the electronic fan is inconsistent with the standard gear, determining that the thermal management system is abnormal in function.
5. The utility model provides a pure electric vehicles thermal management system test equipment which characterized in that includes: the test method for the thermal management system of the pure electric vehicle comprises a memory, a processor and a test program which is stored in the memory and can run on the processor, wherein the test program is executed by the processor, and the test method for the thermal management system of the pure electric vehicle is realized by the processor.
6. A readable storage medium having a test program stored thereon, wherein the test program, when executed by a processor, implements the method for testing a thermal management system of a blade electric vehicle according to any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111339861.9A CN114136672B (en) | 2021-11-12 | 2021-11-12 | Method and device for testing heat management system of pure electric vehicle and readable storage medium |
| PCT/CN2022/131530 WO2023083331A1 (en) | 2021-11-12 | 2022-11-11 | Method and device for testing thermal management system of battery electric vehicle, and readable storage medium |
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| CN202111339861.9A CN114136672B (en) | 2021-11-12 | 2021-11-12 | Method and device for testing heat management system of pure electric vehicle and readable storage medium |
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| CN114136672B (en) * | 2021-11-12 | 2023-06-13 | 上汽通用五菱汽车股份有限公司 | Method and device for testing heat management system of pure electric vehicle and readable storage medium |
| CN114895649A (en) * | 2022-04-23 | 2022-08-12 | 中国第一汽车股份有限公司 | Electric automobile thermal management system testing device, method and system and electronic equipment |
| CN116256181B (en) * | 2023-03-07 | 2023-11-07 | 苏州跃动汽车技术服务有限公司 | Test method and device for thermal management system of hybrid electric vehicle |
| CN117075529B (en) * | 2023-10-18 | 2024-01-05 | 中汽研（天津）汽车工程研究院有限公司 | Whole vehicle thermal system control development platform and method |
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| CN106227186B (en) * | 2016-07-12 | 2019-11-01 | 北京长城华冠汽车科技股份有限公司 | A kind of test macro and method of electric car heat management pipeline |
| CN106248390B (en) * | 2016-07-12 | 2019-03-22 | 北京长城华冠汽车科技股份有限公司 | A kind of test macro and method of electric car heat management pipeline |
| CN106708010B (en) * | 2016-11-29 | 2019-10-22 | 北京长城华冠汽车科技股份有限公司 | A kind of test device and test macro of thermal management system of electric automobile |
| CN108843548B (en) * | 2018-05-28 | 2020-04-03 | 北京长城华冠汽车科技股份有限公司 | State monitoring method and device for heat management loop of pure electric vehicle |
| CN113157015B (en) * | 2020-01-22 | 2022-05-24 | 广州汽车集团股份有限公司 | Thermal management system testing method, platform, computer equipment and readable storage medium |
| DE102020112038B3 (en) * | 2020-05-05 | 2021-11-11 | Audi Aktiengesellschaft | Method for performing a test of a thermal management system and thermal management system |
| CN111779664B (en) * | 2020-06-30 | 2022-06-24 | 蜂巢能源科技有限公司 | Simulation method, device and equipment for electric automobile heat management water pump |
| CN113140811B (en) * | 2021-02-24 | 2023-04-21 | 合众新能源汽车股份有限公司 | Water pump control system and control method of power battery thermal management system |
| CN114136672B (en) * | 2021-11-12 | 2023-06-13 | 上汽通用五菱汽车股份有限公司 | Method and device for testing heat management system of pure electric vehicle and readable storage medium |
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| WO2023083331A1 (en) | 2023-05-19 |
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