Method and device for testing low-temperature efficiency of electric drive assembly

Abstract

The embodiment of the application provides a kind of electric drive assembly low temperature efficiency temperature control test method and device, it is related to electric drive assembly test technical field, the method comprises: control electric drive assembly test device power on;Wherein, the electric drive assembly test device is used to test the low temperature efficiency of electric drive assembly, the electric drive assembly test device includes environment bin and the test bench in environment bin;Setting device parameters and test parameters, according to test condition, write automatic program;According to device parameters and test parameters, run automatic program;Based on the decision rule set, actual test data is judged and adjusted;Export actual test data, and obtain efficiency test result according to actual test data;Realize to improve the test precision and test efficiency of electric drive assembly low temperature efficiency test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric drive assembly test, in particular to an electric drive assembly low-temperature efficiency temperature control test method and device. BACKGROUND

[0002] With the rapid development of new energy vehicles, the requirement for the test results of electric drive assembly bench test is higher and higher, and the transmission efficiency test is a high-precision performance test, and the low-temperature efficiency test is a difficult problem in efficiency test, so the electric drive assembly low-temperature efficiency test device has high precision requirements, and the efficiency improvement of 0.1% in the test needs to be verified and calculated multiple times, and the accuracy of the results must be ensured. At present, there are few devices for testing the low-temperature efficiency of electric drive assembly, and the existing devices have low efficiency and precision in testing the low-temperature efficiency. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an electric drive assembly low-temperature efficiency temperature control test method and device to solve the problem of low efficiency and precision of the existing electric drive assembly low-temperature efficiency test device.

[0004] In a first aspect, the embodiments of the present application provide an electric drive assembly low-temperature efficiency temperature control test method, comprising:

[0005] controlling the electric drive assembly test device to be powered on; wherein the electric drive assembly test device is used to test the low-temperature efficiency of the electric drive assembly, and the electric drive assembly test device comprises an environment bin and a test bench arranged in the environment bin;

[0006] setting device parameters and test parameters, and writing an automatic program according to test conditions;

[0007] running the automatic program according to the device parameters and the test parameters;

[0008] judging and adjusting the actual test data based on a set judgment rule;

[0009] exporting the actual test data, and obtaining an efficiency test result according to the actual test data.

[0010] In the above implementation process, the electric drive assembly test device is controlled to be powered on; wherein the electric drive assembly test device is used to test the low-temperature efficiency of the electric drive assembly, and the electric drive assembly test device comprises an environment bin and a test bench arranged in the environment bin; device parameters and test parameters are set, and an automatic program is written according to test conditions; the automatic program is run according to the device parameters and the test parameters; the actual test data is judged and adjusted based on a set judgment rule; the actual test data is exported, and an efficiency test result is obtained according to the actual test data; and the test precision and test efficiency of the electric drive assembly low-temperature efficiency test are improved.

[0011] Further, the setting device parameters and test parameters, according to the test conditions to write automatic program, including:

[0012] Set device parameters, the device parameters include the actual oil temperature, speed and torque;

[0013] When the device parameters reach the set target value, run the test parameters, including time, condition speed, condition oil temperature, condition torque, step variable step;

[0014] According to the test conditions to write automatic program, set the device bench output speed, and then set the device output torque.

[0015] In the above implementation process, set the device parameters and test parameters, and write the automatic program to test the low temperature efficiency of the electric drive assembly.

[0016] Further, the automatic program is run according to the device parameters and test parameters, including:

[0017] Run the environment bin and the automatic program according to the set target value of the device;

[0018] When the actual oil temperature is equal to the environment oil temperature, control the torque sensor of the test bench to zero;

[0019] Start the test bench operation, and control the output speed of the test bench until the condition speed is reached;

[0020] Control the output torque of the input motor of the test bench, the output torque initial value is 0, gradually assign the output torque until the output torque reaches the condition speed and the condition torque, and maintain the set time; wherein, the output torque is assigned to the torque value of the previous one plus the step.

[0021] In the above implementation process, the device and the automatic program are run, and preliminary adjustment is made to ensure normal operation of the device.

[0022] Further, the actual test data is judged and adjusted based on the set determination rule, including:

[0023] When the difference between the actual oil temperature and the condition oil temperature is not within the set oil temperature range, it is determined that the actual oil temperature does not meet the test conditions, the output torque and speed of the test bench are set to 0, and the automatic program is run again;

[0024] When the difference between the actual oil temperature and the condition oil temperature is within the set oil temperature range, it is determined that the actual oil temperature meets the test conditions, the test bench is controlled to run the next working condition, the output speed is set unchanged, and the output torque is set to the previous output torque plus the step;

[0025] If the actual torque value is greater than the maximum torque value under the speed condition, the determination condition is yes, the output torque and the speed of the test bench are controlled to be 0, the environmental chamber is controlled to stop running, and the test is ended;

[0026] If the actual torque value is less than or equal to the maximum torque value under the speed condition, the determination condition is no, the test bench is controlled to continue running, the speed is set to be unchanged, and the output torque is set to be the previous output torque plus a step size, until the actual torque value is greater than the maximum torque value under the speed condition.

[0027] In the above implementation process, the operation parameters of the device are adjusted according to the actual test data, so that the test is more accurate.

[0028] Further, the actual test data is derived, and the efficiency test result is obtained according to the actual test data, including:

[0029] The actual test data is derived through the upper computer of the test bench, and the efficiency calculation formula is:

[0030] η=(P 输出 / P 输入 )*100%;

[0031] P 输出 =(T 输出 ×N 输出 ) / C;

[0032] P 输入 =(T 输入 ×N 输入 ) / C;

[0033] Wherein, P 输出 represents output power; P 输入 represents input power; T 输入 represents input speed; N 输入 represents input torque; T 输出 represents output speed; N 输出 represents output torque; C is a constant;

[0034] The efficiency test result is obtained.

[0035] In the above implementation process, the actual test data is derived, the efficiency is calculated, the test of the low-temperature efficiency of the electric drive assembly is realized, the test result is accurate and reliable, and the test efficiency is high.

[0036] Further, before the electric drive assembly test device is powered on, the method further includes:

[0037] The electric drive assembly low-temperature efficiency test device is installed and debugged.

[0038] In the implementation process, the low-temperature efficiency test device of the electric drive assembly is installed and debugged to ensure stable subsequent testing.

[0039] In a second aspect, the embodiments of the present application provide an electric drive assembly low-temperature efficiency temperature control test device, comprising:

[0040] A data construction module is configured to construct a data set and divide the data set into a training set and a test set.

[0041] A model training module is configured to set algorithm parameters, input the training set into an algorithm model for model training, input the test set into the trained model for testing, and output a predicted test threshold.

[0042] A result evaluation module is configured to evaluate and adjust the test results.

[0043] A result prediction module is configured to predict the next test threshold and generate a prediction result.

[0044] In a third aspect, the embodiments of the present application provide an electronic device, comprising:

[0045] A processor, a memory and a bus, the processor being connected to the memory through the bus, the memory storing computer readable instructions, when the computer readable instructions are executed by the processor, the electric drive assembly low-temperature efficiency temperature control test method is implemented.

[0046] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, the computer readable storage medium storing a computer program, when the computer program is executed by a server, the electric drive assembly low-temperature efficiency temperature control test method is implemented.

[0047] In a fifth aspect, the embodiments of the present application provide a computer program product, the computer program product comprising instructions, when the instructions are executed by a computer, the computer implements the electric drive assembly low-temperature efficiency temperature control test method. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0049] Figure 1 A flowchart of an electric drive assembly low-temperature efficiency temperature control test method provided by the embodiments of the present application is shown in the figure.

[0050] Figure 2 is a structural schematic diagram of a low-temperature efficiency temperature control test device for an electric drive assembly provided by an embodiment of the present application.

[0051] Figure 3 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0053] It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms “first”, “second”, and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0054] Please refer to Figure 1 , Figure 1 is a flowchart of a low-temperature efficiency temperature control test method for an electric drive assembly provided by an embodiment of the present application. Referring to Figure 1 , the low-temperature efficiency temperature control test method for the electric drive assembly comprises the following steps.

[0055] 100, powering on a test device for an electric drive assembly; wherein the test device for the electric drive assembly is used for testing the low-temperature efficiency of the electric drive assembly, and the test device for the electric drive assembly comprises an environmental bin and a test bench arranged in the environmental bin.

[0056] Optionally, before powering on the test device for the electric drive assembly, the low-temperature efficiency test device for the electric drive assembly is installed and debugged, so as to ensure the stable performance of subsequent tests.

[0057] 200, setting device parameters and test parameters, and compiling an automatic program according to test conditions.

[0058] Specifically, device parameters are set, the device parameters comprising actual oil temperature, rotating speed, and torque; when the device parameters reach the set target values, test parameters are run, the test parameters comprising time, conditional rotating speed, conditional oil temperature, conditional torque, and step variable step length; an automatic program is compiled according to test conditions, the output rotating speed of the device is set, and the output torque of the device is set; the device parameters and the test parameters are set, and the automatic program is compiled, so as to test the low-temperature efficiency of the electric drive assembly.

[0059] For example, set the actual oil temperature as t, the rotation speed as n, and the torque as T. When the actual oil temperature is t, the rotation speed is n, and the torque is T, run for s, condition rotation speed n1, condition oil temperature t1, condition torque T1, and X is the step variable step length (optionally, the step variable step length is 100). According to the test conditions, write an automatic program. First, set the bench output rotation speed, and then set the output torque.

[0060] It can be understood that the electric drive assembly includes a motor, a reducer, and an inverter. The inverter is connected to the motor, controls the motor, and provides high-voltage electricity to the motor. The motor is connected to the reducer, drives the input end of the reducer, and transmits the motor power to the output end of the reducer and the output shaft, and then to the output dynamometer. When testing the test bench, the control logic provides rotation speed through the output shaft to the input end of the reducer. The real vehicle motor of the electric drive assembly provides torque, which is also transmitted to the output motor through the reducer. Therefore, in the setting of the automatic program, the output rotation speed is set first, and then the output torque is set.

[0061] 300. Run the automatic program according to the device parameters and test parameters.

[0062] Specifically, run the environmental bin and the automatic program according to the set target values of the device; when the actual oil temperature is equal to the environmental oil temperature, control the torque sensor of the test bench to zero; start the test bench to run, and control the output rotation speed of the test bench until the condition rotation speed is reached; control the output torque of the input motor, the initial value of the output torque is 0, gradually assign values to the output torque until the output torque reaches the condition rotation speed and the condition torque, and maintain the set time; wherein, the output torque is assigned a value that is the torque value of the previous one plus the step length; run the device and the automatic program, and make preliminary adjustments to ensure normal operation of the device.

[0063] For example, start the automatic program, and the environmental bin starts to run according to the set target values. When the actual oil temperature t is equal to the environmental oil temperature t1, i.e., t = t1, continue to run, and set the torque sensor of the test bench to zero to ensure the accuracy of the torque sensor. Start the bench to run, and when the output rotation speed n reaches the condition rotation speed n1, i.e., n = n1, the input motor outputs torque. The initial value of the output torque is 0, and the subsequent output torque is assigned a value that is the torque value of the previous one plus the step length X, i.e., T = TX. After reaching the target value, i.e., reaching the condition rotation speed n1 and the condition torque T1, run under the next working condition for a set time, which is optionally 5 seconds, i.e., s ≥ 5s, and enter the next process.

[0064] 400. Judge and adjust the actual test data based on the set judgment rules.

[0065] 410、When the difference between the actual oil temperature and the condition oil temperature is not within the set oil temperature range, it is determined that the actual oil temperature does not meet the test conditions, the output torque and the rotational speed of the test bench are set to 0, and the automatic program is re-run.

[0066] 420、When the difference between the actual oil temperature and the condition oil temperature is within the set oil temperature range, it is determined that the actual oil temperature meets the test conditions, the test bench is controlled to run the next working condition, the output rotational speed is set to be unchanged, and the output torque is set to be the previous output torque plus a step length.

[0067] 430、If the actual torque value is greater than the maximum torque value in the rotational speed condition, it is determined that the condition is yes, the output torque and the rotational speed of the test bench are set to 0, the environmental chamber is controlled to stop running, and the test is ended.

[0068] 440、If the actual torque value is less than or equal to the maximum torque value in the rotational speed condition, it is determined that the condition is no, the test bench is controlled to continue running, the rotational speed is set to be unchanged, and the output torque is set to be the previous output torque plus a step length, until the actual torque value is greater than the maximum torque value in the rotational speed condition.

[0069] It can be understood that the actual test data is determined and adjusted based on the set determination rule, including the oil temperature determination process and the actual torque value determination process.

[0070] For example, the oil temperature determination is that when the difference between the actual oil temperature and the condition oil temperature is within the set oil temperature range (optionally, the set oil temperature range is between -5°C and +5°C), that is, the actual oil temperature is equal to the condition oil temperature or the actual oil temperature is greater than the condition oil temperature by 5°C or the actual oil temperature is less than the condition oil temperature by 5°C, it is determined that the oil temperature meets the test conditions, the test bench is controlled to run the next working condition, the output rotational speed is set to be unchanged, and the output torque T1 is set to be the previous output torque T plus a step length X, that is, T1=T+X; when the difference between the actual oil temperature and the condition oil temperature is not within the set oil temperature range, it is determined that the condition is no, the output torque of the test bench is reduced to 0, the output rotational speed is reduced to 0, and the automatic program is re-run.

[0071] For example, in determining the actual torque value, if the actual torque value T is greater than the maximum torque value T1 under the operating speed condition (i.e., TX>T1), the determination condition is yes. All torque points under this operating speed condition have been completed, the output torque of the test bench is reduced to 0, the output speed is reduced to 0, the environmental chamber stops operating, and the test ends. When the actual torque value is less than or equal to the maximum torque value under this operating speed condition (i.e., TX≤T2), the determination condition is no. The test bench continues to operate, the output speed remains unchanged, and the output torque T is set to the previous output torque increment X, i.e., output torque value T = T0 + X. This process is repeated to increase the test torque value until T>T1. Then, all torque points under this operating speed condition have been completed, the output torque of the test bench is reduced to 0, the output speed is reduced to 0, the environmental chamber stops operating, and the test ends.

[0072] 500. Export the actual test data and obtain the efficiency test results based on the actual test data.

[0073] The actual test data is exported from the host computer of the test bench, and the efficiency is calculated using the formula:

[0074] η=(P 输出 / P 输入 )*100%;

[0075] P 输出 =(T 输出 ×N 输出 ) / C;

[0076] P 输入 =(T 输入 ×N 输入 ) / C;

[0077] Among them, P 输出 Indicates output power; P 输入 Indicates input power; T 输入 Indicates the input rotational speed; N 输入 Indicates input torque; T 输出 Indicates the output speed; N 输出 This represents the output torque; C is a constant.

[0078] Optionally, C is a constant, which can take the value 9550.

[0079] Thus, the efficiency test results are obtained.

[0080] As is understandable, the input speed and input torque are the set input data, and thus the input power is calculated, and the efficiency is obtained.

[0081] In the above implementation process, actual test data is exported, efficiency is calculated, and the low-temperature efficiency of the electric drive assembly is tested. The test results are accurate and reliable, and the test efficiency is high.

[0082] The above, the embodiment of the application controls the power-on of the electric drive assembly test device; wherein the electric drive assembly test device is used for testing the low-temperature efficiency of the electric drive assembly, the electric drive assembly test device comprises an environment bin and a test bench arranged in the environment bin; device parameters and test parameters are set, an automatic program is written according to test conditions; the automatic program is run according to the device parameters and the test parameters; the actual test data is judged and adjusted based on the set judgment rules; the actual test data is exported, and the efficiency test result is obtained according to the actual test data; the test precision and the test efficiency of the low-temperature efficiency test of the electric drive assembly are improved.

[0083] The above steps are not executed in the order described according to the number, and should be understood as a whole scheme.

[0084] In the second aspect, on the basis of the above-mentioned embodiment, Figure 2 A structural schematic diagram of an electric drive assembly low-temperature efficiency temperature control test device provided by the embodiment of the application is provided. Figure 2 The electric drive assembly low-temperature efficiency temperature control test device provided by the embodiment comprises a data construction module 201, a model training module 202, a result evaluation module 203 and a result prediction module 204.

[0085] The data construction module 201 is used for constructing a data set and dividing the data set into a training set and a test set; the model training module 202 is used for setting algorithm parameters, inputting the training set into an algorithm model for model training, inputting the test set into the trained model for testing, and outputting a predicted test threshold; the result evaluation module 203 is used for evaluating and adjusting the test result; and the result prediction module 204 is used for predicting the next test threshold and generating a prediction result.

[0086] The above, the embodiment of the application controls the power-on of the electric drive assembly test device; wherein the electric drive assembly test device is used for testing the low-temperature efficiency of the electric drive assembly, the electric drive assembly test device comprises an environment bin and a test bench arranged in the environment bin; device parameters and test parameters are set, an automatic program is written according to test conditions; the automatic program is run according to the device parameters and the test parameters; the actual test data is judged and adjusted based on the set judgment rules; the actual test data is exported, and the efficiency test result is obtained according to the actual test data; the test precision and the test efficiency of the low-temperature efficiency test of the electric drive assembly are improved.

[0087] The electric drive assembly low-temperature efficiency temperature control test device provided by the embodiment of the application can be used to execute the electric drive assembly low-temperature efficiency temperature control test method provided by the above-mentioned embodiment, and has the corresponding functions and beneficial effects.

[0088] In a third aspect, the embodiments of the present application further provide an electronic device, which can integrate the low-temperature efficiency temperature control test device for the electric drive assembly provided by the embodiments of the present application. Figure 3 is a structural schematic diagram of an electronic device provided by the embodiments of the present application. Referring to Figure 3 The electronic device includes an input device 43, an output device 44, a memory 42 and one or more processors 41; the memory 42 is configured to store one or more programs; when the one or more programs are executed by the one or more processors 41, the one or more processors 41 implement the low-temperature efficiency temperature control test method for the electric drive assembly provided by the above embodiments. The input device 43, the output device 44, the memory 42 and the processor 41 can be connected by a bus or other means, Figure 3 In the above embodiment, the connection by the bus is taken as an example.

[0089] The processor 41 executes various function applications and data processing of the device by running the software programs, instructions and modules stored in the memory 42, that is, implements the low-temperature efficiency temperature control test method for the electric drive assembly.

[0090] The electronic device provided by the above embodiment can be used to execute the low-temperature efficiency temperature control test method for the electric drive assembly provided by the above embodiment, and has the corresponding functions and beneficial effects.

[0091] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, which includes a stored computer program; wherein when the computer program runs, the computer readable storage medium controls the device where the computer readable storage medium is located to execute the low-temperature efficiency temperature control test method for the electric drive assembly as described above, and can achieve the same beneficial effects.

[0092] Of course, the storage medium provided by the embodiments of the present application includes computer executable instructions, which are not limited to the low-temperature efficiency temperature control test method for the electric drive assembly as described above, but can also execute the related operations in the low-temperature efficiency temperature control test method for the electric drive assembly provided by any embodiments of the present application.

[0093] In a fifth aspect, the embodiments of the present application further provide a computer program product. The method described in each of the embodiments of the present application can be implemented wholly or partially by software, hardware, firmware, or any combination thereof. When implemented by software, the computer program product can be implemented in the form of a computer program or instructions. When the computer program or instructions are loaded on a computer, the processes or functions described in each of the embodiments of the present application are executed wholly or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, a core network device, an OAM (Open Aplication Model), or other programmable devices.

[0094] The computer program or instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions can be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center through a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, and the like that integrates one or more available media. The available medium can be a magnetic medium, for example, a floppy disk, a hard disk, a magnetic tape; an optical medium, for example, a digital video disc; and a semiconductor medium, for example, a solid-state disk. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0095] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other manners. The apparatus embodiments described above are only schematic, for example, the flowcharts and block diagrams in the drawings show the possible implementation architectures, functions, and operations of the apparatus, method, and computer program product according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment, or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that, in some alternative implementations, the functions noted in the blocks can occur in different orders from those noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that executes the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0096] In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0097] If the functions are implemented in the form of software functional modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for making an electronic device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0098] The above is only an embodiment of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0099] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be limited to the protection scope of the claims.

[0100] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are used herein merely as labels, and are not intended to impose ordinal import.

Claims

1. A method for low-temperature efficiency control testing of an electric drive assembly, characterized in that, The method comprises the following steps: controlling the power-on of the electric drive assembly test device; wherein the electric drive assembly test device is used for testing the low-temperature efficiency of the electric drive assembly, and the electric drive assembly test device comprises an environmental chamber and a test bench arranged in the environmental chamber; setting device parameters and test parameters, and compiling an automatic program according to test conditions; running the automatic program according to the device parameters and the test parameters; judging and adjusting actual test data based on a set judgment rule; exporting the actual test data, and obtaining an efficiency test result according to the actual test data; the running of the automatic program according to the device parameters and the test parameters comprises: running the environmental chamber and the automatic program according to the set target value of the device; controlling the torque sensor of the test bench to be zeroed when the actual oil temperature is equal to the environmental oil temperature; starting the operation of the test bench, and controlling the output speed of the test bench until the condition speed is reached; controlling the output torque of the input motor of the test bench, the initial value of the output torque is 0, the output torque is gradually assigned, until the output torque reaches the condition speed and the condition torque, and the set time is maintained; wherein the output torque is assigned as the torque value of the previous one plus the step length.

2. The method of claim 1, wherein, the setting of the device parameters and the test parameters, and the compiling of the automatic program according to the test conditions comprises: setting the device parameters, which include the actual oil temperature, the speed and the torque; running the test parameters when the device parameters reach the set target value, the test parameters include the time, the condition speed, the condition oil temperature, the condition torque and the step length variable; compiling the automatic program according to the test conditions, setting the bench output speed of the device, and then setting the output torque of the device.

3. The method of claim 1, wherein, the judgment and adjustment of the actual test data based on the set judgment rule comprises: when the difference between the actual oil temperature and the condition oil temperature is not within the set oil temperature range, it is judged that the actual oil temperature does not meet the test conditions, the output torque and the speed of the test bench are set to 0, and the automatic program is run again; when the difference between the actual oil temperature and the condition oil temperature is within the set oil temperature range, it is judged that the actual oil temperature meets the test conditions, the test bench is controlled to run the next working condition, the output speed is set to be unchanged, and the output torque is set to be the previous output torque plus the step length; if the actual torque value is greater than the maximum torque condition value under the speed condition, it is judged that the condition is yes, the output torque and the speed of the test bench are set to 0, the environmental chamber is controlled to stop running, and the test is ended; if the actual torque value is less than or equal to the maximum torque value under the speed condition, it is judged that the condition is no, the test bench is controlled to continue running, the speed is set to be unchanged, and the output torque is set to be the previous output torque plus the step length, until the actual torque value is greater than the maximum torque condition value under the speed condition.

4. The method of claim 1, wherein, the exporting of the actual test data, and the obtaining of the efficiency test result according to the actual test data comprises: the actual test data is exported through the upper computer of the test bench, and the efficiency test result is obtained through the efficiency calculation formula: ； ； ； wherein, represents output power; represents input power; represents input rotational speed; represents input torque; represents output rotational speed; represents output torque; and C is a constant. before the power-on of the electric drive assembly test device, the method further comprises:

5. The method of claim 1, wherein, installing and debugging the electric drive assembly low-temperature efficiency test device. ​ 6. An electric drive assembly low temperature efficiency temperature control testing device, characterized in that, ​ The starting control module is configured to control power-on of the electric drive assembly test device; the electric drive assembly test device is configured to test low-temperature efficiency of the electric drive assembly, and the electric drive assembly test device comprises an environment bin and a test bench arranged in the environment bin; The parameter setting module is configured to set device parameters and test parameters, and to compile an automatic program according to test conditions; The automatic running module is configured to run the automatic program according to the device parameters and the test parameters; The determination and adjustment module is configured to determine and adjust actual test data based on a set determination rule; The result obtaining module is configured to export the actual test data, and to obtain an efficiency test result according to the actual test data.

7. An electronic device, comprising: The processor, the memory and the bus, the processor is connected with the memory through the bus, the memory has computer readable instructions, when the computer readable instructions are executed by the processor, is used for realizing the electric drive assembly low-temperature efficiency temperature control test method as any one of claims 1-5. The computer program is stored on the computer readable storage medium, and the computer program is executed by the server to realize the electric drive assembly low-temperature efficiency temperature control test method as any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer program product comprises instructions, which, when executed by a computer, cause the computer to implement the electric drive assembly low-temperature efficiency temperature control test method according to any one of claims 1-5.

9. A computer program product, characterised in that, ​

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