Power control method in whole vehicle test and whole vehicle test system

Abstract

The application provides a power control method in whole vehicle testing and a whole vehicle testing system. The method receives current working condition information of a to-be-tested whole vehicle in a target running mode sent by a whole vehicle testing model through a first communication module and a second communication module. The current working condition information includes current running information, current battery information of a power battery system and a historical torque value at a previous moment. The current running information and the current battery information are analyzed by using a preset power analysis condition to determine a current power limit value of the power battery system. A current torque limit value is determined based on the current power limit value and the historical torque value, and the current torque limit value is sent to the whole vehicle testing model through the first communication module and the second communication module to realize testing of the to-be-tested whole vehicle. The method combines actual working condition information of the whole vehicle, shortens a whole vehicle testing project cycle and reduces a strategy verification cost.

Description

Technical Field

[0001] This application relates to the field of vehicle testing technology, and more specifically, to a power control method and a vehicle testing system for vehicle testing. Background Technology

[0002] In new energy vehicles, the role of the power battery is to provide power. The performance of the power battery directly affects the vehicle's power and fuel economy. Therefore, in the early stages of new energy vehicle development, it is necessary to match the performance of the power battery to ensure that it meets the vehicle's performance requirements. In addition to meeting the conventional requirements for voltage platform and energy capacity, another important performance aspect of the power battery is its power output and its usage strategy.

[0003] In current power utilization strategy design work, the actual needs of various vehicle operating conditions are often disregarded. As a result, the designed power utilization strategy cannot be effectively judged before vehicle application. This often leads to the inability to meet the power requirements of specific vehicle operating conditions during the real vehicle testing and verification stage, forcing a complete modification of the designed power utilization strategy and extending the cycle of the vehicle testing project. Summary of the Invention

[0004] The purpose of this application is to provide a power control method and a vehicle testing system for vehicle testing, in order to solve the above-mentioned problems existing in the prior art. By combining the actual operating condition information of the vehicle, unnecessary strategy changes are avoided in vehicle testing, the vehicle testing project cycle is shortened, and the strategy verification cost is reduced.

[0005] Firstly, a power control method for vehicle testing is provided, applied to a power control model in a vehicle testing system. The vehicle testing system further includes a vehicle testing model, which includes a first communication module; the power control model includes a second communication module. The method may include:

[0006] The first communication module and the second communication module receive the current operating condition information of the vehicle under test in the target operating mode sent by the vehicle test model. The current operating condition information includes the current operating information, the current battery information of the power battery system and the historical torque value at the previous moment.

[0007] Using preset power analysis conditions, the current operating information and the current battery information are analyzed to determine the current power limit of the power battery system;

[0008] Based on the current power limit and the historical torque value, a current torque limit is determined, and the current torque limit is sent to the vehicle test model through the first communication module and the second communication module to realize the testing of the vehicle under test.

[0009] In one possible implementation, the current operating information includes the vehicle's actual power information and the current ambient temperature; the current battery information includes the current SOC and the voltage of each individual battery cell in the power battery system;

[0010] Using preset power analysis conditions, the current operating information and the current battery information are analyzed to determine the current power limit of the power battery system, including:

[0011] Based on the current SOC and the current ambient temperature, the first power value of the power battery system at different time periods is determined;

[0012] The process is traversed in ascending order of duration. The duration reached is taken as the current duration. The actual power of the vehicle at the current duration in the actual power information of the vehicle is detected and the first power value of the corresponding duration is determined to establish the first power limit.

[0013] The largest second power value among the second power values ​​corresponding to the voltage of each individual battery cell is determined as the second power limit.

[0014] The minimum power value between the first power limit and the second power limit is confirmed as the current power limit of the power battery system.

[0015] In one possible implementation, the magnitude between the actual vehicle power for the current duration and a first power value for the corresponding duration in the vehicle's actual power information is detected to determine a first power limit, including:

[0016] If the actual power of the vehicle at the current duration is greater than the first power value of the corresponding duration, then the next duration adjacent to the current duration will be taken as the new current duration, and the process will return to the execution step: detect the difference between the actual power of the vehicle at the current duration and the first power value of the corresponding duration in the actual power information of the vehicle;

[0017] If the actual power of the vehicle during the current duration is not greater than the first power value for the corresponding duration, then the first power value for the current duration is determined as the first power limit.

[0018] In one possible implementation, if the actual vehicle power information includes actual vehicle charging power information and actual vehicle discharging power information, and the first power value for different durations includes first charging power for different durations and first discharging power for different durations, then the current power limit includes the maximum charging power and the maximum discharging power; the current torque limit includes the driving torque limit and the braking torque limit.

[0019] In one possible implementation, before determining the current torque limit based on the current power limit and the historical torque value, the method further includes:

[0020] Obtain the motor drive loss, motor braking loss, and motor speed corresponding to the historical torque value.

[0021] In one possible implementation, when the current power limit includes both maximum charging power and maximum discharging power, determining the current torque limit based on the current power limit and the historical torque value includes:

[0022] The difference between the maximum discharge power and the motor drive loss Ploss1 is determined as the current motor drive power limit.

[0023] The sum of the maximum charging power and the motor braking loss is determined as the current motor braking recovery power;

[0024] Using a preset torque algorithm, the current motor's drive power limit and regenerative braking power are calculated to obtain the current torque limit.

[0025] In one possible implementation, the method further includes:

[0026] The maximum power consumption of each electrical load in the vehicle under test is obtained by the first communication module and the second communication module.

[0027] Determining the current torque limit based on the current power limit and the historical torque value includes:

[0028] The difference between the maximum charging power, the motor drive loss, and the maximum operating power is determined as the current motor drive power limit.

[0029] The sum of the maximum charging power, the motor braking loss, and the maximum operating power is determined as the current motor regenerative braking power.

[0030] The current torque limit is obtained by using a preset torque algorithm to calculate the current motor drive power limit and the current motor regenerative braking power.

[0031] Secondly, a vehicle testing system is provided, which may include: a vehicle testing model and a power control model; the vehicle testing model includes a first communication module; the power control model includes a second communication module.

[0032] The vehicle test model is used to send the current operating condition information of the vehicle under test in the target operating mode to the power control model through the first communication module. The current operating condition information includes the current operating information, the current battery information of the power battery system, and the historical torque value at the previous moment.

[0033] The power control model is used to receive the current operating condition information through the second communication module; and to analyze the current operating information and the current battery information using preset power analysis conditions to determine the current power limit of the power battery system; and to determine the current torque limit based on the current power limit and the historical torque value, and to send the current torque limit to the vehicle test model through the second communication module.

[0034] The vehicle test model is also used to receive the current torque limit through the first communication module and to test the vehicle under test based on the current torque limit.

[0035] Thirdly, an electronic device is provided, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0036] Memory, used to store computer programs;

[0037] When a processor executes a program stored in memory, it implements any of the steps described in the first aspect above.

[0038] Fourthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when executed by a processor, the computer program implements the steps of any of the methods described in the first aspect above.

[0039] The power control method for vehicle testing provided in this application involves a power control model receiving current operating condition information of the vehicle under test in the target operating mode from a vehicle testing model via a first communication module and a second communication module. This current operating condition information includes current operating information, current battery information of the power battery system, and the historical torque value from the previous moment. Using preset power analysis conditions, the current operating information and current battery information are analyzed to determine the current power limit of the power battery system. Based on the current power limit and the historical torque value, a current torque limit is determined, which is then sent to the vehicle testing model via the first and second communication modules to perform the testing of the vehicle under test. This method combines various actual operating condition information of the vehicle, avoiding unnecessary strategy changes during vehicle testing, shortening the vehicle testing project cycle, and reducing strategy verification costs. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of a vehicle testing system provided in an embodiment of this application;

[0042] Figure 2 A flowchart illustrating a power control method in vehicle testing provided in this application embodiment;

[0043] Figure 3 A schematic diagram illustrating the power-time curve relationship under NEDC conditions provided in this application embodiment;

[0044] Figure 4 This is a schematic diagram of the structure of a power control device in a vehicle test provided in an embodiment of this application;

[0045] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0047] The power control method for vehicle testing provided in this application embodiment can be applied to... Figure 1 In the vehicle testing system shown, such as Figure 1 As shown, the vehicle testing system may include: the vehicle to be tested, the vehicle test model, and the power control model;

[0048] The vehicle to be tested is a physical vehicle, which is used to perform test runs based on the test instructions in the vehicle test model.

[0049] The vehicle test model is used to acquire torque data transmitted from the power control model and test data input by the test personnel; based on the acquired data, test commands are generated to perform test control on the vehicle under test. It may include: a first communication module, a vehicle model, a driver model, a passenger compartment model, a power battery system model, a motor system model, a VCU control model, an accessory electrical system model, and a driving environment model, etc.

[0050] In the whole vehicle model, vehicle parameters such as vehicle mass, vehicle drag, rolling resistance, frontal area, and wheelbase are preset.

[0051] In the driver model, parameters such as vehicle cycle conditions, acceleration and braking signals are preset;

[0052] In the power battery system model, basic information such as individual battery information, series and parallel configuration information, SOC-OCV data, and internal resistance are set.

[0053] The vehicle VCU control model includes pre-set vehicle operating modes and braking energy recovery strategies, drive motor simulation parameters, which may include motor type, motor speed, motor external characteristic torque, system efficiency MAP of motor and controller, etc.

[0054] In the electrical system model of the accessories, the total energy consumption of the electrical accessories is pre-set in a certain operating model;

[0055] The driving environment module allows for the pre-setting of vehicle driving environment information, which may include parameters such as ambient temperature, road slope, and wind speed.

[0056] A power control model is used to execute the power control method in the vehicle test of this application from a vehicle test model to realize the design of the power usage strategy. It may include: a second communication module, a torque limit conversion module, and a power limit module; the power limit module is used to determine the power limit of the motor; the torque limit conversion module is used to convert the motor power limit into motor torque.

[0057] As can be seen, this application implements the designed power utilization strategy in the power control model and then performs joint control with the vehicle test model. Furthermore, in order to integrate the designed power utilization strategy with the vehicle test model, a corresponding torque limiting conversion module also needs to be designed within the power control model.

[0058] In addition, to achieve the integration of the vehicle test model and the power usage strategy of the design, it is necessary to set up corresponding communication modules in each model to transmit data between them.

[0059] In one embodiment, the following is combined Figure 1The application describes a vehicle testing system based on a power control method used in vehicle testing.

[0060] The vehicle test model is used to send the current operating condition information of the vehicle under test in the target operating mode to the power control model through the first communication module. The current operating condition information may include the current operating information, the current battery information of the power battery system, and the historical torque value at the previous moment;

[0061] The power control model is used to receive current operating condition information through the second communication module; and to analyze and process the current operating information and current battery information using preset power analysis conditions to determine the current power limit of the power battery system; and to determine the current torque limit based on the current power limit and historical torque value, and send the current torque limit to the vehicle test model through the second communication module.

[0062] The vehicle test model is also used to receive the current torque limit through the first communication module and to test the vehicle under test based on the current torque limit.

[0063] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0064] Figure 2 This is a flowchart illustrating a power control method for vehicle testing provided in an embodiment of this application. Figure 2 As shown, this method is applied to a power control model, and the method may include:

[0065] Step S210: Obtain the current operating condition information of the vehicle under test in the target operating mode.

[0066] Specifically, the power control model can receive the current operating condition information of the vehicle under test in the target operating mode sent by the vehicle test model through the first communication module and the second communication module. The current operating condition information may include the current operating information, the current battery information of the power battery system, and the historical torque value at the previous moment.

[0067] Current operating information may include the vehicle's actual power information and the current ambient temperature; front battery information may include the current SOC and the voltage of each individual cell in the power battery system.

[0068] The actual vehicle power information can include the vehicle's actual voltage and actual current at different times. Depending on the power type, the actual vehicle power information can include the vehicle's actual charging power information and the vehicle's actual discharging power information.

[0069] Step S220: Using preset power analysis conditions, analyze and process the current operating information and current battery information to determine the current power limit of the power battery system.

[0070] In practical implementation, since the power of the power battery system is affected by the battery's SOC and temperature T, the first power value of the power battery system at different time periods can be obtained by looking up an existing matrix relationship table of SOC, temperature, and power, under the current SOC (e.g., 30% SOC) and current ambient temperature T (e.g., -10℃). For example, the first power value of the power battery system within an average of 5 seconds, 10 seconds, and 30 seconds can be obtained under the current SOC and current ambient temperature T.

[0071] Based on the actual vehicle voltage and actual vehicle current at different times in the actual vehicle power information, the actual vehicle power at different time periods can be statistically obtained; for example, the actual vehicle power value over an average of 5 seconds, the actual vehicle power value over an average of 10 seconds, and the actual vehicle power value over an average of 30 seconds can be obtained.

[0072] Then, the system iterates through the data in ascending order of duration, using the duration encountered as the current duration. It then checks the difference between the actual vehicle power at the current duration and the first power value for the corresponding duration to determine the first power limit P. limit1 .

[0073] Among them, for determining the first power limit P limit1 The specific steps may include:

[0074] If the actual power of the vehicle at the current duration is greater than the first power value of the corresponding duration, then the next duration adjacent to the current duration will be taken as the new current duration, and the execution steps will be returned: the size between the actual power of the vehicle at the current duration and the first power value of the corresponding duration will be detected in the actual power information of the vehicle, until the last duration is traversed in order;

[0075] If the actual power of the vehicle during the current duration is not greater than the first power value for the corresponding duration, then the first power value for the current duration is determined as the first power limit P. limit1 .

[0076] In one example, the first power value within 5 seconds, the first power value within 10 seconds, and the first power value within 30 seconds are known, as well as the actual power value of the vehicle within 5 seconds, the actual power value of the vehicle within 10 seconds, and the actual power value of the vehicle within 30 seconds.

[0077] The process iterates through the vehicles in ascending order of duration. Starting with a duration of 5 seconds, it compares the actual power value of the vehicle within those 5 seconds with the first power value within the same 5 seconds. If the actual power value within those 5 seconds is not greater than the first power value within the same 5 seconds, then the first power value within those 5 seconds is set as the first power limit P. limit1 ;

[0078] If the actual power value of the vehicle within 5 seconds is greater than the first power value within 5 seconds, then the duration of 10 seconds is taken as the new current duration, and the difference between the actual power value of the vehicle within 10 seconds and the first power value within 10 seconds is detected.

[0079] If the actual power value of the vehicle within 10 seconds is not greater than the first power value within 10 seconds, then the first power value within 10 seconds is determined as the first power limit P. limit1 Conversely, if the duration is 30 seconds, then the new current duration is set, and so on, until all durations are traversed in order.

[0080] Understandably, if the first power limit is not determined after sequentially traversing to the last duration, the actual vehicle power information for the new time period can be obtained from the vehicle test model to re-execute step S220. Alternatively, an alarm message can be sent to the test personnel, indicating that the currently obtained actual vehicle power information has a problem, so that the test personnel can provide the actual vehicle power information for the new time period. Or, the process can be exited directly.

[0081] Furthermore, considering that the power of the power battery system can also be affected by the voltage of individual cells in the power battery system, the second power value corresponding to the voltage of each individual cell is obtained; and the largest second power value among the second power values ​​corresponding to the voltage of each individual cell is determined as the second power limit P. limit2 ;

[0082] Finally, based on the obtained first power limit P limit1 Second power limit P limit2 The minimum power value between the first power limit and the second power limit is determined as the current power limit P of the power battery system. limit That is, P limit =min(P limit1 P limit2 ).

[0083] It should be noted that when the vehicle's actual power information includes both the vehicle's actual charging power information and the vehicle's actual discharging power information, and when the first power value for different durations includes the first charging power for different durations and the first discharging power for different durations, the current power limit P... limit Including maximum charging power P limit_chr and maximum discharge power P limit_dis .

[0084] In other words, if the power involved in step S220 includes charging power, that is, the actual vehicle power includes the actual vehicle charging power, and the first power value includes the first charging power value, then the current power limit value P obtained after executing step S220 is... limit This includes the maximum charging power P. limit_chr If the power involved in step S220 includes discharge power, that is, the actual vehicle power includes the actual vehicle discharge power and the first power value includes the first discharge power value, then the corresponding current power limit value P obtained after executing step S220 is... limit This includes the maximum discharge power P. limit_chr .

[0085] Step S230: Determine the current torque limit based on the current power limit and historical torque values.

[0086] Before performing this step, the power control model can obtain the speed efficiency corresponding to the historical torque value at the given motor speed n by looking up an existing matrix table of drive motor torque, motor speed, and speed efficiency. This allows the model to obtain the motor drive loss P corresponding to the historical torque value. loss1 and motor braking loss P loss2 .

[0087] The current torque limit may include the drive torque limit and the braking torque limit.

[0088] In specific implementation, the maximum discharge power P can be... limit_dis and motor drive loss P loss1 The difference is determined as the current motor drive power limit P. 电机驱动 ;

[0089] Maximum charging power P limit_chr Motor braking loss P loss2 The sum of these values ​​is determined as the current regenerative braking power P of the motor. 电机制动 ;

[0090] Using a preset torque algorithm, the current motor drive power limit P is set. 电机驱动 and the current regenerative braking power P of the motor 电机制动 Calculations are performed to obtain the current torque limit.

[0091] The preset torque algorithm can be expressed as: Where P is power and n is motor speed.

[0092] It should be noted that due to the motor drive loss P loss1 and motor braking loss P loss2It will also change with the increase of motor aging time, temperature difference changes in operating temperature, and the increase of maintenance frequency. Therefore, the actual motor drive loss P can be accurately determined according to actual business needs. loss1 and motor braking loss P loss2 The calculations performed are not limited herein.

[0093] Furthermore, the power control model can also obtain the maximum power used by each electrical load in the vehicle under test sent by the vehicle test model through the first communication module and the second communication module.

[0094] Maximum discharge power P limit_dis Motor drive loss P loss1 The difference between the maximum operating power and the maximum operating power is determined as the current motor drive power limit P. 电机驱动 ;

[0095] Maximum charging power P limit_chr Motor braking loss P loss2 The sum of the maximum operating power and the regenerative braking power P of the motor is determined as the current regenerative braking power P. 电机制动 ;

[0096] Using a preset torque algorithm, the current motor drive power limit P is set. 电机驱动 and the current regenerative braking power P of the motor 电机制动 Calculations are performed to obtain the current torque limit.

[0097] As can be seen, the method provided in this application combines various actual operating conditions of the vehicle, which can ensure that the designed power usage strategy (the determined maximum charging power and maximum discharging power) meets the power requirements of the actual vehicle. In order to establish control logic with the vehicle test model, a power-to-torque conversion module, i.e. a torque limit conversion module, is added to the power control module. The energy loss of motor drive and braking is considered in the conversion, which ensures that the power strategy is more in line with the actual vehicle.

[0098] Furthermore, during the verification phase of the power control method provided in this application for vehicle testing, under conditions of -15℃, 15% SOC, and NEDC operating conditions, such as... Figure 3As shown, the vertical axis represents the power of the battery, and the horizontal axis represents time, in seconds. Curve 1 represents the actual power of the battery, curve 2 represents the discharge power limit, curve 3 represents the charging power limit, and curve 4 represents the ideal power of the battery (represented by a dashed line in the figure). It can be seen that before 1020s, curves 1 and 4 almost always overlap. Between 1020s and 1180s, curve 4 decreases, and curves 1 and 2 overlap, indicating a limitation on discharge power. At this point, the actual power is output according to the power limit, thus achieving NEDC performance under the above conditions. This allows for the redesign of power usage strategies based on actual needs.

[0099] Corresponding to the above method, embodiments of this application also provide a power control device for vehicle testing, such as... Figure 4 As shown, the device includes:

[0100] The receiving unit 410 is used to receive the current operating condition information of the vehicle under test in the target operating mode sent by the vehicle test model through the first communication module and the second communication module. The current operating condition information includes current operating information, current battery information of the power battery system and historical torque value at the previous moment.

[0101] Analysis unit 420 is used to analyze the current operating information and the current battery information using preset power analysis conditions to determine the current power limit of the power battery system;

[0102] The determining unit 430 is used to determine the current torque limit based on the current power limit and the historical torque value, so as to send the current torque limit to the vehicle test model through the first communication module and the second communication module to realize the test of the vehicle to be tested.

[0103] The functions of each functional unit of the power control device in the vehicle test provided in the above embodiments of this application can be implemented through the above methods and steps. Therefore, the specific working process and beneficial effects of each unit in the power control device in the vehicle test provided in the embodiments of this application will not be repeated here.

[0104] This application also provides an electronic device, such as... Figure 5 As shown, it includes a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other through the communication bus 540.

[0105] Memory 530 is used to store computer programs;

[0106] When the processor 510 executes the program stored in the memory 530, it performs the following steps:

[0107] The first communication module and the second communication module receive the current operating condition information of the vehicle under test in the target operating mode sent by the vehicle test model. The current operating condition information includes the current operating information, the current battery information of the power battery system and the historical torque value at the previous moment.

[0108] Using preset power analysis conditions, the current operating information and the current battery information are analyzed to determine the current power limit of the power battery system;

[0109] Based on the current power limit and the historical torque value, a current torque limit is determined, and the current torque limit is sent to the vehicle test model through the first communication module and the second communication module to realize the testing of the vehicle under test.

[0110] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0111] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0112] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0113] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0114] The implementation methods and beneficial effects of the various components of the electronic device in the above embodiments for solving the problem can be found in [reference needed]. Figure 2 The steps in the illustrated embodiments are used to implement the electronic device. Therefore, the specific working process and beneficial effects of the electronic device provided in this application will not be repeated here.

[0115] In another embodiment provided in this application, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the power control method in the vehicle test described in any of the above embodiments.

[0116] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute the power control method in vehicle testing as described in any of the above embodiments.

[0117] Those skilled in the art will understand that the embodiments in this application can be provided as methods, systems, or computer program products. Therefore, the embodiments in this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the embodiments in this application can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0118] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0119] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0120] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0121] Although preferred embodiments have been described in this application, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0122] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of the embodiments of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims in this application and their equivalents, then this application also intends to include these modifications and variations.

Claims

1. A method for power control in vehicle testing, characterized in that, The power control model is applied to a vehicle test system, the vehicle test system further comprises a vehicle test model, the vehicle test model comprises a first communication module; the power control model comprises a second communication module, and the method comprises: receiving, through the first communication module and the second communication module, current working condition information of a vehicle to be tested in a target operating mode sent by the vehicle test model, the current working condition information comprising current operating information, current battery information of a power battery system and a historical torque value at a previous moment; analyzing the current operating information and the current battery information by using preset power analysis conditions to determine a current power limit value of the power battery system; determining a current torque limit value based on the current power limit value and the historical torque value, and sending the current torque limit value to the vehicle test model through the first communication module and the second communication module to realize testing of the vehicle to be tested; wherein the current operating information comprises vehicle actual power information and a current environment temperature; and the current battery information comprises a current SOC and voltages of each single battery in the power battery system; analyzing the current operating information and the current battery information by using preset power analysis conditions to determine a current power limit value of the power battery system, comprising: determining first power values of the power battery system at different time lengths based on the current SOC and the current environment temperature; iterating in an order from short to long time length, taking the iterated time length as a current time length, detecting a size between a vehicle actual power in the vehicle actual power information at the current time length and a corresponding first power value at the time length to determine a first power limit value; determining a second power limit value as a maximum second power value among second power values corresponding to the voltages of each single battery; determining a minimum power value among the first power limit value and the second power limit value as the current power limit value of the power battery system.

2. The method of claim 1, wherein, detecting a size between a vehicle actual power in the vehicle actual power information at the current time length and a corresponding first power value at the time length to determine a first power limit value, comprising: if the vehicle actual power at the current time length is greater than the first power value at the corresponding time length, taking a next time length adjacent to the current time length as a new current time length, and returning to step of detecting a size between a vehicle actual power in the vehicle actual power information at the current time length and a corresponding first power value at the time length; if the vehicle actual power at the current time length is not greater than the first power value at the corresponding time length, determining the first power value at the current time length as the first power limit value.

3. The method of claim 1, wherein, if the vehicle actual power information comprises vehicle actual charging power information and vehicle actual discharging power information, and the first power values at different time lengths comprise first charging power at different time lengths and first discharging power at different time lengths, the current power limit value comprises maximum charging power and maximum discharging power; and the current torque limit value comprises driving torque limit value and braking torque limit value.

4. The method of claim 3, wherein, before determining the current torque limit value based on the current power limit value and the historical torque value, the method further comprises: acquire motor driving loss, motor braking loss and motor rotating speed corresponding to the historical torque value.

5. The method of claim 4, wherein, When the current power limit value includes maximum charging power and maximum discharging power, determine current torque limit value based on the current power limit value and the historical torque value, including: determine the difference between the maximum discharging power and the motor driving loss as the driving power limit value of the current motor; determine the sum of the maximum charging power and the motor braking loss as the braking recovery power of the current motor; adopt a preset torque algorithm to calculate the driving power limit value of the current motor and the braking recovery power of the current motor respectively to obtain the current torque limit value.

6. The method of claim 5, wherein, The method further includes: acquire the maximum usage power of the electrical loads in the vehicle to be tested sent by the vehicle test model through the first communication module and the second communication module; determine current torque limit value based on the current power limit value and the historical torque value, including: determine the difference between the maximum charging power, the motor driving loss and the maximum usage power as the driving power limit value of the current motor; determine the sum of the maximum charging power, the motor braking loss and the maximum usage power as the braking recovery power of the current motor; adopt a preset torque algorithm to calculate the driving power limit value of the current motor and the braking recovery power of the current motor to obtain the current torque limit value.

7. A vehicle test system, characterized by, The system includes a vehicle test model and a power control model; the vehicle test model includes a first communication module; the power control model includes a second communication module; the vehicle test model is configured to send current working condition information of a vehicle to be tested in a target operating mode to the power control model through the first communication module, the current working condition information including current operating information, current battery information of a power battery system and a historical torque value at a previous time; the power control model is configured to receive the current working condition information through the second communication module, analyze the current operating information and the current battery information based on a preset power analysis condition to determine a current power limit value of the power battery system, determine a current torque limit value based on the current power limit value and the historical torque value, and send the current torque limit value to the vehicle test model through the second communication module; the vehicle test model is further configured to receive the current torque limit value through the first communication module and test the vehicle to be tested based on the current torque limit value. The current operating information includes vehicle actual power information and current environmental temperature; the current battery information includes current SOC and voltage of each single battery in the power battery system. The power control model is specifically configured to: determine first power values of the power battery system at different time lengths based on the current SOC and the current ambient temperature; traverse the time lengths in order from short to long, take a time length as a current time length after traversal, detect a size between a vehicle actual power at the current time length in the vehicle actual power information and the first power value at the corresponding time length, and determine a first power limit value; determine a maximum second power value of the second power values corresponding to the single battery voltages as a second power limit value; and determine a minimum power value between the first power limit value and the second power limit value as a current power limit value of the power battery system.

8. An electronic device, comprising: The electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus. The memory is configured to store a computer program. The processor is configured to execute the program stored on the memory to implement the method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method in any one of claims 1-6.

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