CN113253700A - Hardware-in-loop closed-loop test method and system for battery management system - Google Patents
Hardware-in-loop closed-loop test method and system for battery management system Download PDFInfo
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- CN113253700A CN113253700A CN202110402317.8A CN202110402317A CN113253700A CN 113253700 A CN113253700 A CN 113253700A CN 202110402317 A CN202110402317 A CN 202110402317A CN 113253700 A CN113253700 A CN 113253700A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The invention relates to the field of battery management system testing, in particular to a hardware-in-loop closed-loop testing method and system of a battery management system. A hardware-in-loop closed-loop test method of a battery management system comprises the following steps: s1, connecting a test sample with an HIL test platform; s2, configuring a real-time external hardware interface by using a configurationDesk of dSPACE, and managing a signal path between external hardware and a model; setting a model of the I/O and the monitoring and controlled object based on dSPACE; and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to an HIL test platform through a ControlDesk of dSPACE to perform signal interaction test, and recording experimental data. The invention has the beneficial effects that: the closed loop rate of the battery management system BMS hardware simulation HIL test can be improved by setting various models of monitoring and controlled objects.
Description
Technical Field
The invention relates to the field of battery management system testing, in particular to a hardware-in-loop closed-loop testing method and system of a battery management system.
Background
In the hardware-in-loop simulation test HIL of the battery management system BMS, one key link is the closed loop test of a tested piece and a test system, and the closed loop test is completed, namely the tested battery management system BMS is in a simulated whole vehicle environment, so that the application scene test of the battery management system BMS can be realized, including the states of fault simulation, whole vehicle operation, charging and the like.
The completeness of the closed-loop test determines the coverage degree of the HIL test, the high coverage degree of the test can solve the potential risk of the project in terms of functional requirements and safety as completely as possible in the development stage, and the after-sale cost caused by the development problem is reduced to the lowest value.
The closed loop degree of the battery management system BMS hardware in the ring simulation test HIL in the current industry is uneven, and the closed loop contents of the battery management system BMS and a test platform comprise: the system comprises a battery monomer or module model, a high-voltage control model, a thermal management model, a charger model and a whole vehicle model. Most manufacturers in the industry concentrate on high-voltage control simulation, fault diagnosis simulation and static state simulation of single voltage at present, the testing coverage of the BMS is incomplete due to insufficient closed-loop rate, and the actual operation environment of the BMS cannot be well simulated.
Disclosure of Invention
In order to solve the problem that the closed loop degree of a battery management system in a loop closed loop test is insufficient to cause low closed loop test coverage rate, and optimize the existing battery management system in the loop closed loop test, the invention provides a hardware in-loop closed loop test method and a hardware in-loop closed loop test system of the battery management system, and the specific scheme is as follows:
a hardware-in-loop closed-loop test method of a battery management system comprises the following steps:
s1, connecting a test sample with an HIL test platform;
s2, configuring a real-time external hardware interface by using a configurationDesk of dSPACE, and managing a signal path between external hardware and a model; setting a model of the I/O and the monitoring and controlled object based on dSPACE;
and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to an HIL test platform through a ControlDesk of dSPACE to perform signal interaction test, and recording experimental data.
Specifically, step S2 configures the allocation pin through the configuration desk, establishes a communication connection between the external hardware and the corresponding model, and manages the signal path.
Specifically, when the test sample is a BMU slave control unit;
the model comprises:
the battery model comprises single or module battery voltage, temperature and balanced current, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform;
interface model of BMU slave control unit and SCU: the CAN communication establishes an interface model by importing a DBC file; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
cascaded BMU slave control unit interface model: the interface model is realized through CAN or daisy chain and is used for verifying the cascade interface test of one BMU slave control unit and another BMU slave control unit;
BMU slave control unit power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform.
Specifically, when the test sample is an SCU host control unit;
the model comprises:
the SCU host control unit is integrated with a high-voltage relay and a loop interlocking I/O interface model in an HIL test platform;
SCU host control unit and n BMU communication interface model: the CAN communication establishes an interface model by importing a DBC file; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
the communication interface model of the SCU host control unit and the VCU of the vehicle control unit is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of SCU host control unit and charging device: and the communication simulation function is realized by importing the CAN DBC file.
Specifically, when the test sample is a BMS system;
the model comprises:
the battery model comprises single or module battery voltage, temperature and balanced current, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform;
the system comprises a high-voltage relay and a loop interlocking I/O interface model, wherein the models are integrated in an HIL test platform;
the communication interface model of the VCU of the vehicle controller is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of charging device: the communication simulation function is realized by importing CAN DBC files;
power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform.
Specifically, the BMS system includes: n BMU slave control units and SCU master control unit.
Specifically, the interface model of the VCU includes: a state machine of a VCU of the vehicle controller and a vehicle working condition control model; the communication and interface model of the charging device comprises a charging model; the state machine, the whole vehicle working condition control model and the charging model of the VCU of the whole vehicle controller are realized through Matlab stateflow modeling.
The system using the hardware-in-loop closed-loop test method of the battery management system comprises the following steps: the device comprises a test sample, an upper computer and an HIL test platform; the upper computer is connected with the HIL test platform, and the HIL test platform is connected with the test sample.
Specifically, when the test sample is a BMS system, the BMS system is connected to the HIL test platform through a load box.
Specifically, the interface to the sample, high voltage relay hardware.
The invention has the beneficial effects that:
(1) the testing method and the testing system can improve the closed loop rate of the battery management system BMS hardware simulation HIL test by setting a plurality of models of monitoring and controlled objects.
(2) The testing method and the system provided by the invention can be used for solving the problem of possible faults, perfecting the product design of the BMS, providing a platform for realizing high automation rate of HIL testing and improving the efficiency of HIL testing.
(3) The test method and the test system can realize
The system integration test comprises the following steps: safety-related functional policy testing; testing a basic function; testing the system interaction function;
the fault diagnosis test comprises the following steps: a fault handling strategy; a failed DTC;
the interface test comprises the following steps; BMS and controlled object battery monomer or module interface, BMS and other controller communication interface, BMS and charging device interface, BMS's power supply interface, collision signal, interfaces such as loop interlock signal.
The simulation real vehicle test comprises the following steps: testing the upper and lower high-voltage electric functions of starting and stopping the vehicle; controlling system charging; testing the running condition of the vehicle; and (5) fault injection testing.
(4) The test method and the test system provided by the invention conform to three links of a functional safety test ISO 26262-4, and the three links comprise:
software-hardware layer testing; carrying out system integration test; and (6) carrying out integrated test on the whole vehicle.
(5) The types of tests which can be performed by the test method and the test system provided by the invention comprise: a level of robustness; the functional safety requirement is correctly executed on the whole vehicle layer; the safety mechanism has correct functional performance on the whole vehicle level; accuracy and timing; the consistency and correctness of the internal and external interfaces; effectiveness of the safety mechanism in failure coverage at the vehicle level.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a system test system for in-loop closed-loop testing of a battery management system according to the present invention;
FIG. 2 is a schematic diagram of a BMS system and its monitoring interaction objects;
FIG. 3 is a schematic diagram of a test system in which the test sample is a BMS system;
the labels in the figure are specifically:
1. an HIL test platform; 2. testing the sample; 3. an upper computer; 4. a load box.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A hardware-in-loop closed-loop test method of a battery management system comprises the following steps:
example 1 comprises the following steps:
s1, connecting the BMU slave control unit and the HIL test platform 1;
s2, configuring a real-time external hardware interface by using a configuration desk of dSPACE, and managing a signal path between a BMU slave control unit and a model; setting a model of the I/O and the monitoring and controlled object based on dSPACE;
and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to the HIL test platform 1 through ControlDesk of dSPACE to perform signal interaction test, and recording experimental data.
The model comprises: the battery model comprises single or module battery voltage, temperature, equalizing current and other parameter information, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform 1;
interface model of BMU slave control unit and SCU: the CAN communication establishes a communication model by importing DBC files; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
cascaded BMU slave control unit interface model: the interface model is realized through CAN or daisy chain and is used for verifying the cascade interface test of one BMU slave control unit and another BMU slave control unit;
BMU slave control unit power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform 1.
Example 2 comprises the following steps:
s1, connecting the SCU host control unit and the HIL test platform 1;
s2, configuring a real-time external hardware interface by using a configuration desk of dSPACE, and managing a signal path between the SCU host control unit and the model; setting a model of the I/O and the monitoring and controlled object based on dSPACE;
and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to the HIL test platform 1 through ControlDesk of dSPACE to perform signal interaction test, and recording experimental data.
The model comprises:
the SCU host control unit is integrated with a high-voltage relay and a loop interlocking I/O interface model in the HIL test platform 1;
SCU host control unit and n BMU communication interface model: the CAN communication establishes a communication model by importing DBC files; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
the communication interface model of the SCU host control unit and the VCU of the vehicle control unit is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of SCU host control unit and charging device: the communication simulation function is realized by importing CAN DBC files;
the system also comprises a state machine of a VCU of the whole vehicle controller and a whole vehicle working condition control model, wherein the model is realized by Matlab stateflow modeling;
the charging model of the charging device is realized by Matlab stateflow modeling, and the parameter content, the time sequence, the speed and the like of communication can be controlled by the model.
Example 3 comprises the following steps:
s1, connecting the BMS system and the HIL test platform 1;
s2, configuring a real-time external hardware interface by using a configurationDesk of dSPACE, and managing a signal path between the BMS system and the model; setting a model of the I/O and the monitoring and controlled object based on dSPACE;
and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to the HIL test platform 1 through ControlDesk of dSPACE to perform signal interaction test, and recording experimental data.
The model comprises:
the battery model comprises single or module battery voltage, temperature, equalizing current and other parameter information, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform 1;
the model comprises: the battery model comprises single or module battery voltage, temperature, equalizing current and other parameter information, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform 1;
the system comprises a high-voltage relay and a loop interlocking I/O interface model, wherein the models are integrated in an HIL test platform 1;
the communication interface model of the VCU of the vehicle controller is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of charging device: the communication simulation function is realized by importing CAN DBC files;
power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform 1;
the BMU and the SCU are in real hardware connection;
the BMS system includes: n BMU slave control units and SCU host control units;
the system also comprises a state machine of a VCU of the whole vehicle controller and a whole vehicle working condition control model, wherein the model is realized by Matlab stateflow modeling;
the charging model of the charging device is realized by Matlab stateflow modeling, and the parameter content, the time sequence, the speed and the like of communication can be controlled by the model.
A system of a hardware-in-loop closed-loop test method of a battery management system comprises the following steps:
as shown in fig. 1, a test sample 2, an upper computer 33 and an HIL test platform 1; the upper computer 33 is connected with the HIL test platform 1, and the HIL test platform 1 is connected with the test sample 2.
Take BMS system testing as an example:
the BMS system actually monitoring the objects and the interactive objects as shown in fig. 2 includes:
the device comprises a battery, a high-voltage relay, a loop interlocking I/O interface, a VCU, a charging device and a power supply.
The monitoring and interaction objects are replaced by models in the HIL test platform 1 as shown in FIG. 3, and the HIL test platform 1 and the BMS system are connected through the load box 4 to realize the ring closed loop test.
The load box 4 includes: interface for switching the device to the sample, high voltage relay hardware. The interface is additionally provided with a control switch device according to the test requirement, so that the test automation can be realized conveniently by controlling the switch device.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hardware-in-loop closed-loop test method of a battery management system is characterized by comprising the following steps:
s1, connecting a test sample (2) and an HIL test platform (1);
s2, configuring a real-time external hardware interface by using a configurationDesk of dSPACE, and managing a signal path between external hardware and a model; setting a model of the I/O and the monitoring and controlled object based on dSPACE;
and S3, generating codes of the I/O set in the step S3 and the model of the monitored and controlled object, downloading the codes to an HIL test platform (1) through a ControlDesk of dSPACE to perform signal interaction test, and recording experimental data.
2. The hardware-in-loop closed-loop testing method of the battery management system according to claim 1,
step S2 configures the allocation pin through a configuration desk, establishes a communication connection between the external hardware and the corresponding model, and manages the signal path.
3. The hardware-in-loop closed-loop test method of the battery management system according to claim 1, wherein when the test sample (2) is a BMU slave control unit;
the model comprises:
the battery model comprises single or module battery voltage, temperature and balanced current, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform (1);
interface model of BMU slave control unit and SCU: the CAN communication establishes an interface model by importing a DBC file; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
cascaded BMU slave control unit interface model: the interface model is realized through CAN or daisy chain and is used for verifying the cascade interface test of one BMU slave control unit and another BMU slave control unit;
BMU slave control unit power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform (1).
4. The hardware-in-loop closed-loop test method of the battery management system according to claim 1, wherein when the test sample (2) is an SCU (master control unit);
the model comprises:
the SCU host control unit is integrated with a high-voltage relay and a loop interlocking I/O interface model in an HIL test platform (1);
SCU host control unit and n BMU communication interface model: the CAN communication establishes an interface model by importing a DBC file; the daisy chain is realized in an SPI communication mode, and an interface model can be established by simulating SPI communication;
the communication interface model of the SCU host control unit and the VCU of the vehicle control unit is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of SCU host control unit and charging device: and the communication simulation function is realized by importing the CAN DBC file.
5. The hardware-in-loop closed-loop test method of the battery management system according to claim 1, wherein when the test sample (2) is a BMS system;
the model comprises:
the battery model comprises single or module battery voltage, temperature and balanced current, the battery model adopts a second-order circuit model, and the model is integrated in the HIL test platform (1);
the high-voltage relay and loop interlocking I/O interface model is integrated in the HIL test platform (1);
the communication interface model of the VCU of the vehicle controller is as follows: the communication simulation function is realized by importing CAN DBC files;
communication and hardware interface model of charging device: the communication simulation function is realized by importing CAN DBC files;
power supply interface model: the method is realized through a low-voltage power supply channel and an I/O board card of the HIL test platform (1).
6. The hardware-in-loop closed-loop testing method of the battery management system according to claim 5, wherein the BMS system comprises: n BMU slave control units and SCU master control unit.
7. The hardware-in-loop closed-loop testing method of the battery management system according to claim 4 or 5, wherein the interface model of the VCU comprises: a state machine of a VCU of the vehicle controller and a vehicle working condition control model; the communication and interface model of the charging device comprises a charging model; the state machine, the whole vehicle working condition control model and the charging model of the VCU of the whole vehicle controller are realized through Matlab stateflow modeling.
8. A system for using the hardware-in-loop closed-loop testing method of the battery management system of any one of claims 1-7, comprising: the device comprises a test sample (2), an upper computer (3) and an HIL test platform (1); the upper computer (3) is connected with the HIL testing platform (1), and the HIL testing platform (1) is connected with the testing sample (2).
9. The system according to claim 8, wherein when the test specimen (2) is a BMS system, the BMS system is connected to the HIL test platform (1) through a load box (4).
10. The system of claim 9, wherein the load box (4) is a test fixture comprising: interface for switching the device to the sample, high voltage relay hardware.
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| CN114546873B (en) * | 2022-02-28 | 2024-06-04 | 深蓝汽车科技有限公司 | HIL automatic test method and system for battery management system |
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