WO2022156403A1

WO2022156403A1 - Relay diagnosis test method, apparatus and system, and storage medium and upper computer

Info

Publication number: WO2022156403A1
Application number: PCT/CN2021/136056
Authority: WO
Inventors: 汪帆; 谷文博; 荣常如; 刘轶鑫; 赵思佳; 王永超; 刘雨霞
Original assignee: 中国第一汽车股份有限公司
Priority date: 2021-01-25
Filing date: 2021-12-07
Publication date: 2022-07-28
Also published as: CN112765821B; CN112765821A

Abstract

A relay diagnosis test method, apparatus and system, and a storage medium and an upper computer. The method comprises: in response to a relay diagnosis test instruction, controlling, on the basis of a voltage value provided by a multi-channel direct-current high-voltage source, a test apparatus to simulate the state of a relay within a simulated battery pack, wherein the state of the relay comprises a normal relay pull-in or disconnection state, and a relay fault state (101); and receiving and displaying data that is detected by a battery management system and is generated during the process of simulating the state of the relay (102).

Description

Relay diagnostic testing method, device, storage medium, host computer and system

This application claims the priority of the Chinese Patent Application No. 202110099172.9 filed with the China Patent Office on January 25, 2021, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the technical field of vehicle control, for example, to a relay diagnostic testing method, device, storage medium, host computer, and system.

Background technique

With the continuous development of new energy vehicles, more and more attention has been paid to battery safety, and relays serve as a bridge for energy transmission between batteries and external loads. The failure of relays in any way will directly or indirectly lead to safety accidents. The fault diagnosis function of the relay in the system puts forward higher requirements.

In the related art, the simulation detection of faults such as relay adhesion, normally open and pre-charge in the battery management system is controlled by the host computer to control the real relay open (Hardware-in-the-Loop, HIL) equipment in the device. It is realized by switching on and off, because the relay in the HIL device is different from the relay on the real vehicle, it cannot actually reflect the real situation of the vehicle operation. Moreover, the HIL equipment realizes the fault simulation of relay open and short circuit by connecting the real relay in series and parallel, which cannot truly reflect the real situation of the relay when the contact fails, and the simulated working condition is single.

SUMMARY OF THE INVENTION

The present application provides a relay diagnostic testing method, device, storage medium, host computer and system, which can comprehensively test the real-time performance and effectiveness of the battery management system for relay state detection, and prevent the actual occurrence of relay failures that the battery management system cannot detect. A safety hazard occurs.

An embodiment of the present application provides a relay diagnostic testing method, including: in response to a relay diagnostic testing instruction, controlling a testing device to simulate a relay state in a simulated battery pack based on a voltage value provided by a multi-channel DC high-voltage source; The state of the relay includes the normal pull-in or disconnection state of the relay and the failure state of the relay; the data generated during the simulation process of the battery management system detecting the state of the relay is received and displayed.

Optionally, before controlling the testing device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source, the method further includes: setting the status of the simulated battery pack. parameters and environmental parameters; wherein, the state parameters and the environmental parameters correspond to the simulated state of the relay.

Optionally, before controlling the testing device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high-voltage source in response to the relay diagnostic test instruction, the method further includes: acquiring A fault test model corresponding to each relay fault type in a plurality of relay fault types, and the fault test model is injected into the test device; in response to the relay diagnostic test instruction, the test device is controlled based on the multiple relay fault types. The voltage value provided by the channel DC high voltage source to simulate the relay state in the simulated battery pack, including: in response to the relay diagnostic test instruction, controlling the test device based on the voltage value provided by the multi-channel DC high voltage source and the fault test model to simulate the fault state of the relay in the simulated battery pack.

Optionally, acquiring the fault test model corresponding to each relay fault type in the plurality of relay fault types includes: acquiring relay fault data based on a big data statistical method; The relay fault data is classified; based on the relay fault data corresponding to each relay fault type, the fault test model corresponding to each relay fault type is constructed.

Optionally, the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data, and environmental data; based on the relay fault data corresponding to each relay fault type, construct a The fault test model includes: constructing a relay simulation model based on the voltage change data at the front and rear ends of the relay corresponding to each relay fault type, and constructing a test environment simulation model based on the battery pack status data and environmental data corresponding to each relay fault type; The relay simulation model and the test environment simulation model are used as fault test models corresponding to each relay fault type.

Optionally, the relay fault states include relay precharge fault, relay discharge fault, relay adhesion fault, relay normally open fault and relay virtual connection fault.

The embodiment of the present application also provides a relay diagnostic testing device, including: a relay simulation module, configured to respond to a relay diagnostic testing instruction, control the testing device based on the voltage value provided by the multi-channel DC high voltage source, to simulate the relay in the battery pack The state of the relay is simulated; wherein, the relay state includes the normal pull-in or disconnection state of the relay, and the relay failure state; the test data display module is set to receive and display the battery management system to detect the data generated during the simulation process of the relay state .

Embodiments of the present application further provide a computer storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the relay diagnostic testing method provided by any embodiment of the present application.

Optionally, the device further includes: a parameter setting module configured to set the simulated battery pack before the control and testing device simulates the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source. State parameters and environment parameters; wherein, the state parameters and the environment parameters correspond to the simulated state of the relay.

Optionally, the device further includes: a fault test model acquisition module, configured to, in response to a relay diagnostic test instruction, control the test device to perform an operation on the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source. Before simulating the relay state in the device, obtain a fault test model corresponding to each relay fault type in the plurality of relay fault types, and inject the fault test model into the test device; the relay simulation module is set to : In response to the relay diagnostic test instruction, the test device is controlled to simulate the fault state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source and the fault test model.

Optionally, the fault test model acquisition module includes: a fault data acquisition unit, set to acquire relay fault data based on a big data statistical method; a fault data classification unit, set to based on the multiple relay fault types, The relay fault data is classified; the fault test model construction unit is configured to construct the fault test model corresponding to each relay fault type based on the relay fault data corresponding to each relay fault type.

Optionally, the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data, and environmental data; the fault test model building unit is set to: based on the voltage change at the front and rear ends of the relay corresponding to each relay fault type. A relay simulation model is constructed from the data, and a test environment simulation model is constructed based on the battery pack state data and environmental data corresponding to each relay fault type; the relay simulation model and the test environment simulation model are used as the The fault test model corresponding to the relay fault type.

Embodiments of the present application provide a host computer, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the computer program provided by the embodiments of the present application when the processor executes the computer program. Relay diagnostic test method.

An embodiment of the present application provides a relay diagnostic testing system, including: a testing device, a host computer, and a battery management system, wherein the testing device includes a multi-channel DC high-voltage source and a simulated battery pack, and the host computer is respectively connected to the The test device is connected to the battery management system; the host computer is configured to control the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein, the The relay state includes a normal pull-in or disconnection state of the relay, and a relay failure state; the battery management system is configured to detect a simulation process of the relay state.

Description of drawings

1 is a schematic flowchart of a relay diagnostic testing method provided by an embodiment of the present application;

2 is a high-voltage schematic diagram of a relay diagnostic test circuit provided by an embodiment of the present application;

3 is a schematic flowchart of a relay state simulation provided by an embodiment of the present application;

4 is a schematic flowchart of another relay diagnostic testing method provided by an embodiment of the present application;

5 is a schematic diagram of a relay diagnostic testing process provided by an embodiment of the present application;

6 is a schematic diagram of another relay diagnostic testing process provided by an embodiment of the present application;

7 is a structural block diagram of a relay diagnostic testing device provided by an embodiment of the present application;

FIG. 8 is a structural block diagram of a host computer provided by an embodiment of the present application;

9 is a schematic structural diagram of a relay diagnostic testing system provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another relay diagnostic testing system provided by an embodiment of the present application.

Detailed ways

The present application will be described below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all the structures related to the present application.

FIG. 1 is a schematic flowchart of a method for diagnosing and testing a relay according to an embodiment of the present application. The method can be performed by a relay diagnostic testing device, wherein the device can be implemented by software and/or hardware, and can generally be integrated in a relay diagnostic testing device (eg, a host computer) or a relay diagnostic testing system. As shown in Figure 1, the method includes the following steps.

Step 101: In response to the relay diagnostic test instruction, the control test device simulates the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high-voltage source; wherein the relay state includes the relay normally being pulled in or disconnected. , and relay fault status.

The multi-channel DC high voltage source can provide multiple same or different voltage values at the same time.

In the embodiment of the present application, when the relay diagnostic test instruction is detected, the control and test device simulates the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high-voltage source, because the multi-channel DC high-voltage source can provide multiple Therefore, the multi-channel DC high voltage source can provide different voltage values to the front end and the back end of the simulated battery pack where the relay should be set, so as to simulate different states of the relay in the simulated battery pack. The relay status can include the relay normally on or off, and the relay fault status, wherein the relay fault status can include the relay precharge fault, the relay discharge fault, the relay sticking fault, the relay normally open fault and the relay virtual connection fault. The sticking faults can include the main positive relay sticking fault, the main negative relay sticking fault and the precharge relay sticking fault, and the relay normally open fault includes the main positive relay normally open fault, the main negative relay normally open fault and the precharge relay normally open fault.

Exemplarily, FIG. 2 is a high-voltage schematic diagram of a relay diagnostic test circuit provided by an embodiment of the present application. As shown in Figure 2, the front and rear voltages of the precharge relay, the front and rear voltages of the main positive relay, the front and rear voltages of the main negative relay, the front and rear voltages of the fast charging positive relay, and the front and rear voltages of the fast charging positive relay and the fast charging negative can be provided for the analog battery pack through the multi-channel DC high voltage source. The voltage at the front and back ends of the relay realizes the simulation of different states of the relay.

Step 102: Receive and display the data generated during the simulation process of the battery management system detecting the relay state.

In the embodiment of the present application, the battery management system detects the simulation process of the relay state, and judges the relay state according to the detection result. If the relay state detected by the battery management system is consistent with the relay state simulated by the testing device, it means that the battery management system can accurately , Effectively detect the real state of the relay, which can effectively ensure the safety of vehicle driving; and if the relay state detected by the battery management system is inconsistent with the relay state simulated by the test device, it means that the battery management system cannot correctly and accurately detect the real state of the relay. , the safety of the vehicle cannot be effectively guaranteed. The battery management system judges whether there is a relay failure according to the collected voltage value and other signals. If the relay state is set to be normal (that is, the test device simulates the relay to be normal) and the battery management system detects that the relay state is normal, the battery management system can report the relay. It is in the normal working state value; if the relay state is set to be abnormal and the battery management system successfully detects that the relay is in an abnormal state, the battery management system can report the abnormal state value of the relay, the fault type of the relay and the fault code and other information. If the battery management system can successfully detect the relay state (normal or abnormal) output by the device, it means that the battery management system can effectively detect the real state of the relay.

In the embodiment of the present application, the data generated during the simulation process of the battery management system detecting the relay state and the detected relay state are received and displayed, so that the tester can understand the effectiveness of the battery management system on the simulated relay state detection.

The relay diagnostic test method provided by the present application includes: in response to a relay diagnostic test instruction, controlling a test device to simulate a relay state in a simulated battery pack based on a voltage value provided by a multi-channel DC high voltage source; wherein the relay state includes Relay normally pull-in or disconnect state and relay failure state; receive and display the data generated during the battery management system to detect relay state simulation process. In the technical solutions provided by the embodiments of the present application, the simulation of any state of the relay can be realized through a multi-channel DC high-voltage source, and the real-time performance and effectiveness of the battery management system for detecting the state of the relay can be fully tested, so as to prevent the actual occurrence of relay failure and battery failure. A situation where the management system cannot detect a security risk occurs.

In some embodiments, before controlling the testing device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source, the method further includes: setting state parameters and environment of the simulated battery pack parameter; wherein, the state parameter and the environment parameter correspond to the simulated relay state. Exemplarily, the state parameters and environmental parameters of the battery pack corresponding to different relay states are different. It can be understood that the state data and environmental data of the battery pack may also be a factor affecting the relay failure. Therefore, when controlling the multi-channel DC When the voltage value provided by the voltage source is used to simulate the state of the relay in the simulated battery pack, the state parameters and environmental parameters of the simulated battery pack corresponding to the state of the relay to be simulated can be set. Depending on the state of the relay to be simulated, the state parameters and environment parameters of the simulated battery pack can be different. The advantage of this setting is that the simulation of the relay state can be made more realistic and closer to the real environment, thereby helping to improve the accuracy of the relay state diagnosis by the battery management system.

In the embodiment of the present application, when the control and test device simulates the normal on or off state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source, the normal on or off state of the relay can be set The corresponding state parameters and environmental parameters of the simulated battery pack. Exemplarily, the process of simulating the normal state of the relay may include: ① system power-on process: the host computer simulates other electronic control units (Electronic Control Unit, ECU) to control the battery management system to send a pull-in relay signal, and the battery management system After sending the pull-in signal of the drive relay, the tester sets the output voltage value of the DC multi-channel high-voltage source to simulate the pull-in state of the relay (the state of the tester's control of the high-voltage source to simulate the relay can also be realized through the automatic test case program), Relay pull-in sequence (voltage setting sequence), main negative pull-in (simulate main negative closing voltage), simulate normal precharge curve ( _{after V precharge} = normal precharge curve), main positive pull-in (simulate main positive relay closing voltage) ), precharge disconnection (simulate the disconnection voltage of the precharge relay), ② the system power-off process: simulate the normal discharge curve (that _{is, after V main positive} = normal discharge curve), simulate the main negative relay disconnect (simulate the main negative relay) Relay disconnection voltage), you can analyze whether the battery management system can effectively detect the real state of the relay through the data reported by the battery management system throughout the process (the relay state should be reported as normal at this time).

In the embodiment of the present application, the fault state of the relay can be simulated by using a multi-channel DC high voltage source. Exemplarily, the process of simulating the fault state of the relay (taking the relay sticking fault as an example) may include: setting a voltage parameter and environmental parameter in the sticking state of the relay, and simulating other ECUs through the host computer to control the battery management system to send the signal. After the relay signal is pulled in, after the battery management system sends the drive relay pull-in signal, the states of the relays other than the sticking relay are set through the DC multi-channel voltage source, and the sequence is the same as that for simulating the normal state of the relay above ( It is not repeated here). At this time, the tester analyzes whether the battery management system can effectively detect the real state of the relay by observing the data reported by the battery management system (at this time, the battery management system (BMS) should be able to report the abnormal state value of the relay, and the fault type—— Sticking fault, DTC - which relay sticks).

The process of simulating the relay pre-charging fault (taking the pre-charging timeout as an example) may include: setting the environmental data, and performing the test sequence in simulating the normal state of the relay, simulating the normal state of the relay. The normal precharge curve voltage is replaced by the precharge timeout curve voltage, and the rest of the environmental data remains unchanged. Finally, read the data reported by the battery management system throughout the process to analyze whether the battery management system can effectively detect the true state of the relay (at this time, the battery management system should It can report the abnormal state value of the relay, fault type - precharge timeout, fault code - precharge timeout fault).

The process of simulating the discharge fault of the relay (taking the discharge timeout as an example) may include: setting the environmental data, and executing the test sequence in the simulation of the normal state of the relay, the normal state of the relay will be simulated. The normal discharge curve voltage is replaced by the discharge time-out curve voltage, and the rest of the environmental data remains unchanged. Finally, read the data reported by the battery management system throughout the process to analyze whether the battery management system can effectively detect the true state of the relay (at this time, the battery management system should It can report the abnormal state value of the relay, fault type - discharge timeout, fault code - discharge timeout fault).

FIG. 3 is a schematic flowchart of a relay state simulation provided by an embodiment of the present application. Combining the above text description and the flow chart shown in FIG. 3 , the relay diagnostic testing process can be understood, which will not be repeated here.

In some embodiments, before controlling the testing device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source in response to the relay diagnostic test instruction, the method further includes: acquiring a plurality of relay fault types. A fault test model corresponding to each relay fault type, and inject the fault test model into the test device; in response to the relay diagnostic test instruction, control the test device based on the voltage value provided by the multi-channel DC high voltage source, to simulate the battery pack Simulating the state of the relay in the battery pack includes: in response to the relay diagnostic test instruction, controlling the test device to simulate the fault state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source and the fault test model. Exemplarily, different fault types of relays correspond to different relay fault data and different fault test models. The fault test model can be understood as a fault test case, and different relay fault types can be simulated based on different fault test cases. In the embodiment of the present application, the fault test model corresponding to each relay fault type in the plurality of relay fault types is injected into the test device, and when the relay diagnostic test instruction is detected, the control test device is based on the multi-channel DC high voltage source. The voltage value and fault test model simulates the fault state of the relay in the battery pack, so that the battery management system can detect the simulated fault state of the relay. The advantage of this setting is that multiple fault states of the relay can be simulated.

In some embodiments, acquiring a fault test model corresponding to each relay fault type in the plurality of relay fault types includes: acquiring relay fault data based on a big data statistical method; Perform classification; build a fault test model corresponding to each relay fault type according to the relay fault data corresponding to each relay fault type. Exemplarily, the relay fault data may include battery pack voltage data, temperature data, humidity data, relay status data, battery pack high voltage status, charging gun connection status, and key door status. Based on the big data statistical method, a large number of real battery pack relay fault data are obtained, and the relay fault data is classified according to various types of relay fault types. It can be understood that different relay fault types correspond to different relay fault data. . Then, according to the relay fault data corresponding to each type of relay fault type, a fault test model corresponding to each type of relay fault type is constructed. For example, if the relay fault types include precharge fault, relay sticking fault, relay discharge fault, relay normally open fault and relay virtual connection fault, the constructed fault test model can include precharge fault test model, relay sticking fault test model, relay Discharge fault test model, relay normally open fault test model and relay virtual connection fault test model. The failure test model can be understood as a failure test case.

Optionally, the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data and environmental data; for the relay fault data corresponding to each relay fault type, a fault test corresponding to each relay fault type is constructed. The model includes: constructing a relay simulation model for the voltage change data at the front and rear ends of the relay corresponding to each relay fault type, and constructing a test environment simulation model for the battery pack status data and environmental data corresponding to each relay fault type; The relay simulation model and the test environment simulation model are used as fault test models corresponding to each relay fault type. Exemplarily, for multiple relay fault types, a relay simulation model is constructed based on the voltage change data at the front and rear ends of the relay. It can be understood that the relay simulation model can accurately reflect the fault status of the relay; based on the battery pack status corresponding to the multiple relay fault types Data and environmental data, build a test environment simulation model, in which the test environment simulation can accurately reflect the real environment corresponding to the fault state of the relay. The advantage of this setting is that the simulation of the relay state can be made more realistic and closer to the real environment, thereby helping to improve the accuracy of the relay state diagnosis by the battery management system.

FIG. 4 is a schematic flowchart of another relay diagnostic testing method provided by an embodiment of the present application. As shown in Figure 4, the method includes the following steps.

Step 401 , acquiring relay fault data based on a big data statistical method; wherein, the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data, and environmental data.

Step 402: Classify the relay fault data based on multiple relay fault types.

Step 403 , build a relay simulation model based on the voltage change data at the front and rear ends of the relay corresponding to each relay fault type, and build a test environment simulation model based on the battery pack status data and environment data corresponding to each relay fault type.

Step 404: Use the relay simulation model and the test environment simulation model as a fault test model corresponding to each relay fault type.

Step 405 , inject the fault test model into the test device.

Step 406 , in response to the relay diagnostic test instruction, control the test device to simulate the fault state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source and the fault test model.

Step 407: Receive and display the data generated during the simulation process of the battery management system detecting the fault state of the relay.

The relay diagnostic testing method provided by the embodiments of the present application can not only simulate any state of the relay through a multi-channel DC high-voltage source, but also comprehensively test the real-time performance and effectiveness of the battery management system for relay state detection, and prevent the actual occurrence of relay failure and battery failure. A situation where the management system cannot detect a security risk occurs. Moreover, in the process of relay fault state simulation, the fault test models corresponding to different relay fault types are constructed based on big data statistics, which makes the relay fault state simulation more realistic and closer to the real environment, thereby helping to improve battery management. The accuracy of the system's diagnosis of relay status.

FIG. 5 is a schematic diagram of a relay diagnostic test process provided by an embodiment of the application, and FIG. 6 is a schematic diagram of another relay diagnostic test process provided by an embodiment of the application. The fault test models corresponding to different relay fault types can be imported into the host computer after other terminal equipments are constructed, so that the host computer controls the test device based on the voltage value and fault test model provided by the multi-channel DC high voltage source, and simulates the battery pack. The fault state of the relay is simulated, and the implementation process can be understood based on the foregoing embodiment and the description in FIG. 5 or FIG. 6 , and details are not repeated here.

FIG. 7 is a structural block diagram of a relay diagnostic testing device provided by an embodiment of the present application. The device can be implemented by software and/or hardware, and is generally integrated in a relay diagnostic testing system or relay diagnostic testing equipment. By executing a relay diagnostic testing method, the battery management system can test various simulated relay states. As shown in FIG. 7 , the device includes: a relay simulation module 701, which is configured to, in response to a relay diagnostic test instruction, control the test device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high-voltage source; wherein , the relay state includes the relay normally on or off, and the relay failure state; the test data display module 702 is configured to receive and display the data generated during the battery management system to detect the relay state simulation process.

The relay diagnostic test device provided by the present application, in response to the relay diagnostic test instruction, controls the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein the relay state includes the relay being normal Pull-in or open state, and relay failure state; receive and display the data generated during the battery management system to detect the relay state simulation process. In the technical solutions provided by the embodiments of the present application, the simulation of any state of the relay can be realized through a multi-channel DC high-voltage source, and the real-time performance and effectiveness of the battery management system for the detection of the relay state can be fully tested to prevent the actual occurrence of relay failure and battery management. A situation where the system cannot detect a security risk occurs.

Optionally, the device further includes: a parameter setting module configured to set the simulated battery pack before the control and testing device simulates the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source. State parameters and environment parameters; wherein, the state parameters and the environment parameters correspond to the simulated relay state.

Optionally, the device further includes: a fault test model acquisition module, configured to, in response to the relay diagnostic test instruction, control the test device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source. Before, acquiring a fault test model corresponding to each relay fault type in the plurality of relay fault types, and injecting the fault test model into the test device; the relay simulation module is set to: in response to a relay diagnostic test instruction , the control test device simulates the fault state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source and the fault test model.

Optionally, the fault test model acquisition module includes: a fault data acquisition unit, configured to acquire relay fault data based on a big data statistical method; The data is classified; the fault test model construction unit is configured to construct a fault test model corresponding to each relay fault type based on the relay fault data corresponding to each relay fault type.

Optionally, the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data, and environmental data; the fault test model building unit is set to: based on the voltage change at the front and rear ends of the relay corresponding to each relay fault type. A relay simulation model is constructed from the data, and a test environment simulation model is constructed based on the battery pack status data and environmental data corresponding to each relay fault type; The failure test model corresponding to the type.

Embodiments of the present application further provide a storage medium containing computer-executable instructions, where the computer-executable instructions are used to execute a relay diagnostic testing method when executed by a computer processor. The method includes: in response to the relay diagnostic testing instruction, controlling The test device simulates the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein, the relay state includes the normal pull-in or disconnection state of the relay, and the relay failure state; receiving and displaying the battery management The system detects the data generated during the simulation of the relay state.

storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media, such as Compact Disc Read-Only Memory (CD-ROM), floppy disks, or tape devices; computer system memory or random access memory, such as dynamic random access memory (Dynamic Random Access Memory). Random Access Memory, DRAM), Double Data Rate Random Access Memory (DDR RAM), Static Random Access Memory (Static Random Access Memory, SRAM), Extended Dupona Output Random Access Memory, EDORAM), Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (eg hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a second, different computer system connected to the first computer system through a network such as the Internet. The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (eg, in different computer systems connected by a network). A storage medium may store program instructions (eg, implemented as a computer program) executable by one or more processors.

Of course, a storage medium containing computer-executable instructions provided by the embodiments of the present application, the computer-executable instructions of which are not limited to the above-mentioned relay diagnostic test operations, and can also perform the relay diagnostic tests provided by any embodiment of the present application. related operations in the method.

The embodiment of the present application provides a host computer, in which the relay diagnosis and testing device provided by the embodiment of the present application can be integrated. FIG. 8 is a structural block diagram of a host computer according to an embodiment of the present application. The host computer 800 may include: a memory 801, a processor 802, and a computer program stored on the memory 801 and executed by the processor, and the processor 802 implements the relay diagnosis described in the embodiments of the present application when the processor 802 executes the computer program testing method.

The host computer provided in the embodiment of the present application, in response to the relay diagnostic test instruction, controls the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein the relay state includes the relay state. Normal pull-in or open state, and relay failure state; receive and display data generated during the simulation process of the battery management system detecting the relay state. In the technical solutions provided by the embodiments of the present application, the simulation of any state of the relay can be realized through a multi-channel DC high-voltage source, and the real-time performance and effectiveness of the battery management system for the detection of the relay state can be fully tested to prevent the actual occurrence of relay failure and battery management. A situation where the system cannot detect a security risk occurs.

The relay diagnostic testing device, storage medium, and host computer provided in the above embodiments can execute the relay diagnostic testing method provided in any embodiment of the present application, and have functional modules corresponding to executing the method. For technical details not described in the above embodiments, reference may be made to the relay diagnostic testing method provided by any embodiment of the present application.

FIG. 9 is a schematic structural diagram of a relay diagnostic testing system according to an embodiment of the present application. As shown in FIG. 9 , the relay diagnostic test system includes a test device, a host computer, and a battery management system, wherein the test device includes a multi-channel DC high-voltage source and a simulated battery pack, and the host computer is connected to the test device and the battery pack respectively. The battery management system is connected; the host computer is configured to control the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high-voltage source; wherein the relay state includes that the relay is normal Pull-in or disconnection state and relay failure state; the battery management system is set to detect relay state simulation process.

The relay diagnosis and testing system provided by the embodiment of the present application can comprehensively test the real-time performance and effectiveness of the battery management system for the detection of the relay state, and prevent the actual occurrence of a relay failure but the battery management system cannot detect it and cause a potential safety hazard. The multi-channel DC high voltage source with no load capacity can effectively reduce the test cost.

FIG. 10 is a schematic structural diagram of another relay diagnostic testing system provided by an embodiment of the present application. As shown in Figure 10, the test device includes a battery cell simulator, a total voltage simulator, an environmental simulator, a multi-channel DC high-voltage source, a low-voltage power supply, other ECU simulation units, a communication module, a charging gun connection simulation unit, and a key door simulation unit. unit and fault injector. The battery cell simulator can realize the simulation of battery packs with different numbers of strings and the simulation of battery cell voltage; total voltage simulator: the total voltage of the simulated battery pack is used to simulate the voltage between the V battery pack and the V negative electrode; environmental simulation The controller can simulate the ambient temperature, battery pack temperature, humidity, etc.; the multi-channel DC high voltage source can simulate the relay status, fault and other information by setting the voltage value at different points; the low voltage power source can simulate the battery to realize the low voltage to the controller. Power supply; other ECU simulation units can realize the information interaction with the battery management system; the communication module can realize the communication interaction between the battery management system and other controllers; the charging gun connection simulation unit can simulate the connection of the AC and DC charging guns; the key door The simulation unit can simulate the signal of the key door; the fault injector can compile the fault test model compiled by the host computer, and simulate the relay fault information through the test device. The advantage of this arrangement is that the test functions of the test device can be increased, so that the test functions are diversified.

Claims

A relay diagnostic testing method, comprising:

In response to the relay diagnostic test instruction, the control test device simulates the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein the relay state includes the relay normally on or off, and the relay fault state;

Receive and display data generated during the simulation of the state of the relay detected by the battery management system.
The method according to claim 1, before controlling the testing device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source, further comprising:

Setting state parameters and environment parameters of the simulated battery pack; wherein, the state parameters and the environment parameters correspond to the simulated state of the relay.
The method according to claim 1, before controlling the test device to simulate the state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source in response to the relay diagnostic test instruction ,Also includes:

acquiring a fault test model corresponding to each relay fault type in the plurality of relay fault types, and injecting the fault test model into the test device;

In response to the relay diagnostic test instruction, controlling the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source, including:

In response to the relay diagnostic test instruction, the test device is controlled to simulate the fault state of the relay in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source and the fault test model.
The method according to claim 3, wherein acquiring the fault test model corresponding to each relay fault type in the plurality of relay fault types comprises:

Obtain relay fault data based on big data statistical methods;

classifying the relay fault data based on the plurality of relay fault types;

The fault test model corresponding to each relay fault type is constructed based on the relay fault data corresponding to each relay fault type.
The method according to claim 4, wherein the relay fault data includes voltage change data at the front and rear ends of the relay, battery pack status data and environmental data;

Based on the relay fault data corresponding to each relay fault type, construct the fault test model corresponding to each relay fault type, including:

A relay simulation model is constructed based on the voltage change data of the front and rear ends of the relay corresponding to each relay fault type, and a test environment simulation model is constructed based on the battery pack state data and environmental data corresponding to each relay fault type;

The relay simulation model and the test environment simulation model are used as fault test models corresponding to each relay fault type.
The method according to any one of claims 1-5, wherein the relay fault states include relay precharge faults, relay discharge faults, relay sticking faults, relay normally open faults, and relay virtual connection faults.
A relay diagnostic testing device, comprising:

The relay simulation module is configured to, in response to the relay diagnostic test instruction, control the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein the relay state includes the relay normally pulling in or Off state, and relay fault state;

The test data display module is configured to receive and display the data generated during the simulation process of the battery management system detecting the state of the relay.
A computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the relay diagnostic testing method according to any one of claims 1-6.
A host computer, comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor implements the relay as described in any one of claims 1-6 when the processor executes the computer program Diagnostic Test Methods.
A relay diagnostic testing system, comprising: a testing device, a host computer and a battery management system, wherein the testing device includes a multi-channel DC high voltage source and a simulated battery pack, the host computer is respectively connected to the testing device and the battery management system connections;

The host computer is configured to control the test device to simulate the relay state in the simulated battery pack based on the voltage value provided by the multi-channel DC high voltage source; wherein, the relay state includes the relay being normally closed or disconnected On state, and relay fault state;

The battery management system is configured to detect a simulated process of the relay state.