CN112380679A - Battery thermal runaway simulation method, device, equipment and storage medium - Google Patents
Battery thermal runaway simulation method, device, equipment and storage medium Download PDFInfo
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- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
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- 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]
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
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Abstract
The embodiment of the invention discloses a method, a device, equipment and a storage medium for simulating thermal runaway of a battery. The method comprises the following steps: acquiring at least one data parameter of thermal runaway of the battery; establishing a battery thermal runaway simulation model according to the data parameters; simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model. By adopting the technical means, the aim of improving the testing efficiency while reducing the cost can be fulfilled.
Description
Technical Field
The embodiment of the invention relates to the technical field of new energy, in particular to a method, a device, equipment and a storage medium for simulating thermal runaway of a battery.
Background
With the continuous progress and development of new energy automobiles, the safety of batteries is more and more emphasized, and for lithium ion batteries, thermal runaway is the most serious safety accident, and can cause the ignition and even explosion of the lithium ion batteries, thereby directly threatening the safety of users. The thermal runaway of the lithium ion battery is mainly caused by that the internal heat generation is far higher than the heat dissipation rate, and a large amount of heat is accumulated in the lithium ion battery, so that a chain reaction is caused, and the battery is ignited and exploded.
Therefore, the research on the testing device and the testing method for the thermal runaway of the battery becomes a key technology for the development of new energy automobiles, but the existing technologies are all tested through the battery pack, so that the cost is high and the time is long.
Therefore, a simulation method for thermal runaway of a battery is needed, which can reduce the cost and improve the testing efficiency.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for simulating thermal runaway of a battery, and aims to reduce cost and improve test efficiency.
In a first aspect, an embodiment of the present invention provides a method for simulating thermal runaway of a battery, including:
acquiring at least one data parameter of thermal runaway of the battery;
establishing a battery thermal runaway simulation model according to the data parameters;
simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
In a second aspect, an embodiment of the present invention further provides a device for simulating thermal runaway of a battery, including:
the data parameter acquisition module is used for acquiring at least one data parameter of battery thermal runaway;
the battery thermal runaway simulation model establishing module is used for establishing a battery thermal runaway simulation model according to the data parameters;
the battery thermal runaway fault simulation module is used for simulating a battery thermal runaway fault through the test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
In a third aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the method for simulating thermal runaway of a battery according to any one of the embodiments of the present invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for simulating thermal runaway of a battery according to any one of the embodiments of the present invention.
The embodiment of the invention provides a method for simulating thermal runaway of a battery, which comprises the following steps: acquiring at least one data parameter of thermal runaway of the battery; establishing a battery thermal runaway simulation model according to the data parameters; simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model. By adopting the technical means, the aim of improving the testing efficiency while reducing the cost can be fulfilled.
Drawings
Fig. 1a is a schematic flowchart of a simulation method for thermal runaway of a battery according to an embodiment of the present invention;
fig. 1b is a schematic diagram of a test simulation platform according to a first embodiment of the present invention;
fig. 1c is a comparison graph of a cell voltage output by a test simulation platform and a cell voltage of thermal runaway provided in the first embodiment of the present invention;
fig. 1d is a graph illustrating a temperature comparison between a temperature output by a test simulation platform and a thermal runaway temperature according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a simulation apparatus for battery thermal runaway according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus provided in the third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, subprograms, and the like.
Example one
Fig. 1a is a schematic flowchart of a method for simulating a battery thermal runaway according to an embodiment of the present invention, where the method is applicable to verifying the real-time performance and the validity of a battery thermal runaway diagnostic function, and the method can be executed by a simulation apparatus for a battery thermal runaway. The device can be realized in a software and/or hardware mode, can be integrated in electronic equipment, and specifically comprises the following steps:
and S110, acquiring at least one data parameter of the thermal runaway of the battery.
In this embodiment, the thermal runaway of the battery means that the current and the battery temperature are cumulatively enhanced and gradually damaged during constant-voltage charging of the battery. The data parameters are obtained based on thermal runaway big data or thermal runaway test data.
Optionally, the at least one data parameter includes: the battery temperature and the battery pressure value are respectively measured according to the cell voltage and the battery temperature and the battery pressure value, the gas concentration in the battery, the smoke concentration in the battery, the carbon dioxide concentration in the battery, the insulation resistance, the humidity and the solid particle concentration.
After the parameters in the non-preset range are obtained, what is the reason for the parameters in the non-preset range can be judged. Specifically, whether the fault is caused by sampling fault, sensor fault or communication fault, the corresponding fault type and fault position are judged and recorded.
And S120, establishing a battery thermal runaway simulation model according to the data parameters.
In this embodiment, the battery thermal runaway simulation model is established based on different data parameters, and a multi-scenario battery thermal runaway simulation model can be realized according to different battery working scenarios.
In this embodiment, optionally, the establishing a battery thermal runaway simulation model according to the data parameters includes:
determining the relevance of the parameters and the change characteristics of the parameters according to the data parameters;
and establishing the battery thermal runaway simulation model according to the relevance of the parameters and the variation characteristics of the parameters.
In the embodiment, the change characteristic of the parameter refers to the change process of the parameter, and exemplarily, the change characteristic of the temperature refers to temperature rise, and the temperature rise is 10 ℃/min. The relevance of parameters refers to the interrelationship between different parameters. Illustratively, the cell voltage decreases while the battery temperature increases. In this embodiment, the variation characteristic of the parameter further includes a variation timing of the parameter, and for example, after the cell voltage decreases to a certain threshold, the battery temperature may increase.
In this embodiment, different thermal runaway working condition data information is extracted according to different data parameters, and different battery thermal runaway simulation models are established for forming a multi-dimensional battery thermal runaway simulation model. Further, the battery thermal runaway simulation model is classified, screened and summarized, and then the battery thermal runaway simulation model is perfected.
S130, simulating a thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
Optionally, the test simulation platform further includes:
the simulation system comprises a power battery simulation model and a battery working scene simulation model.
In this embodiment, the extracting of the battery working scenario includes:
judging whether the current communication of the battery management system is normal or not, and if no communication exists, judging that the current communication is in a sleep mode;
if the communication of the battery management system is normal, whether a charging gun is connected or not needs to be judged, and if the charging gun is connected, the current charging mode is a direct current charging mode, an alternating current charging mode, a remote charging mode, a timing charging mode or other charging modes needs to be judged according to the type and the charging mode of the charging gun;
if the charging gun is not connected, judging whether a discharging gun is connected, and if the discharging gun is connected, the working mode is a discharging mode;
if the discharging gun is not connected, judging the position of the key door, and if the key door is in an OFF gear, judging that the key door is in a power-OFF sleep process or a battery self-awakening process;
if the key door position is a non-OFF gear, judging the state of the contactor, and if the contactor is in an OFF state, judging the contactor to be in a standing mode;
if the high-voltage contactor is in a closed state, the running mode is set;
and through the analysis of the scene, providing the current battery working scene and extracting all judgment parameters in the process.
Optionally, the fault injection model further includes:
fault injection project and fault injection timing.
In this embodiment, the test simulation platform may be selected from the following simulation units according to the data parameters and the battery working scenario: a cell voltage simulation unit, a cell voltage fault simulation unit, a battery temperature fault simulation unit, a pressure fault simulation unit, a humidity fault simulation unit, a carbon dioxide concentration fault simulation unit, a gas concentration fault simulation unit, the device comprises a smoke concentration simulation unit, a smoke concentration fault simulation unit, a solid particulate matter concentration fault simulation unit, a Battery total voltage simulation unit, a Hall shunt simulation unit, a communication fault simulation unit, a low-voltage constant-voltage source, a key door simulation unit, a charging gun connection simulation unit, a high-voltage contactor state simulation unit and a BMS (Battery management System) related input simulation unit. Specifically, a schematic diagram of the test simulation platform can be seen in fig. 1 b.
Specifically, the test simulation platform runs a power battery simulation model to simulate the change condition of the data parameters of the battery in a normal state; the test simulation platform runs a battery working scene simulation model to simulate a working scene when the battery is out of control due to heat; and the test simulation platform runs a battery thermal runaway simulation model to simulate the change of parameters in the thermal runaway process. The test simulation platform carries out synchronous processing on the simulated parameters, and model simulation step lengths of different parameters, a driving step length of the test simulation platform and a response step length of the simulation unit are considered, so that the simulation units of different parameters can be synchronously updated. Furthermore, the time of fault occurrence is accurately simulated through fault injection items, fault injection time sequence driving step length and response step length.
Optionally, after the simulating the fault of the thermal runaway of the battery by the test simulation platform, the method further includes:
and outputting fault data of the battery thermal runaway, and comparing the fault data with at least one data parameter of the battery thermal runaway.
In this embodiment, the thermal runaway simulation model is optimized by comparing the simulated thermal runaway parameter with the real thermal runaway parameter. Specifically, a graph of a voltage ratio of a cell output by the test simulation platform to a voltage ratio of a thermal runaway cell shown in fig. 1c may be referred to, and a graph of a temperature ratio of a temperature output by the test simulation platform to a thermal runaway temperature shown in fig. 1d may be referred to.
The embodiment of the invention provides a method for simulating thermal runaway of a battery, which comprises the following steps: acquiring at least one data parameter of thermal runaway of the battery; establishing a battery thermal runaway simulation model according to the data parameters; simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model. By adopting the technical means, the aim of improving the testing efficiency while reducing the cost can be fulfilled.
Example two
Fig. 2 is a schematic structural diagram of a simulation apparatus for battery thermal runaway according to a second embodiment of the present invention. The simulation device for battery thermal runaway provided by the embodiment of the invention can execute the simulation method for battery thermal runaway provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. As shown in fig. 2, the apparatus includes:
a data parameter acquiring module 210, configured to acquire at least one data parameter of thermal runaway of the battery;
the battery thermal runaway simulation model establishing module 220 is used for establishing a battery thermal runaway simulation model according to the data parameters;
the battery thermal runaway fault simulation module 230 is used for simulating a battery thermal runaway fault through the test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
Optionally, the at least one data parameter includes:
the battery temperature and the battery pressure value are respectively measured according to the cell voltage and the battery temperature and the battery pressure value, the gas concentration in the battery, the smoke concentration in the battery, the carbon dioxide concentration in the battery, the insulation resistance, the humidity and the solid particle concentration.
The battery thermal runaway simulation model establishing module 220 is used for determining the relevance of parameters and the change characteristics of the parameters according to the data parameters;
and establishing the battery thermal runaway simulation model according to the relevance of the parameters and the variation characteristics of the parameters.
Optionally, the test simulation platform further includes:
the simulation system comprises a power battery simulation model and a battery working scene simulation model.
Optionally, the fault injection model further includes:
fault injection project and fault injection timing.
Optionally, the apparatus further comprises:
and the fault data output module 240 is configured to output fault data of the battery thermal runaway and compare the fault data with at least one data parameter of the battery thermal runaway.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the above-described apparatus may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
EXAMPLE III
Fig. 3 is a schematic structural diagram of an apparatus according to a third embodiment of the present invention, and fig. 3 is a schematic structural diagram of an exemplary apparatus suitable for implementing the embodiment of the present invention. The device 12 shown in fig. 3 is only an example and should not bring any limitations to the functionality and scope of use of the embodiments of the present invention.
As shown in FIG. 3, device 12 is in the form of a general purpose computing device. The components of device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 3, and commonly referred to as a "hard drive"). Although not shown in FIG. 3, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of embodiments described herein.
The processing unit 16 executes various functional applications and data processing by running a program stored in the system memory 28, for example, to implement a method for simulating battery thermal runaway provided by the embodiment of the present invention, including:
acquiring at least one data parameter of thermal runaway of the battery;
establishing a battery thermal runaway simulation model according to the data parameters;
simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
Example four
A fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program (or referred to as a computer-executable instruction) is stored, where the computer program, when executed by a processor, can implement a method for simulating thermal runaway of a battery according to any of the embodiments described above, where the method includes:
acquiring at least one data parameter of thermal runaway of the battery;
establishing a battery thermal runaway simulation model according to the data parameters;
simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for simulating thermal runaway of a battery, comprising:
acquiring at least one data parameter of thermal runaway of the battery;
establishing a battery thermal runaway simulation model according to the data parameters;
simulating the thermal runaway fault of the battery through a test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
2. The method of claim 1, wherein the at least one data parameter comprises:
the battery temperature and the battery pressure value are respectively measured according to the cell voltage and the battery temperature and the battery pressure value, the gas concentration in the battery, the smoke concentration in the battery, the carbon dioxide concentration in the battery, the insulation resistance, the humidity and the solid particle concentration.
3. The method of claim 1, wherein the building a battery thermal runaway simulation model from the data parameters comprises:
determining the relevance of the parameters and the change characteristics of the parameters according to the data parameters;
and establishing the battery thermal runaway simulation model according to the relevance of the parameters and the variation characteristics of the parameters.
4. The method of claim 1, wherein the test simulation platform further comprises:
the simulation system comprises a power battery simulation model and a battery working scene simulation model.
5. The method of claim 1, wherein the fault injection model further comprises:
fault injection project and fault injection timing.
6. The method of claim 1, after simulating the failure of thermal runaway of the battery via the test simulation platform, further comprising:
and outputting fault data of the battery thermal runaway, and comparing the fault data with at least one data parameter of the battery thermal runaway.
7. A simulation apparatus for thermal runaway of a battery, comprising:
the data parameter acquisition module is used for acquiring at least one data parameter of battery thermal runaway;
the battery thermal runaway simulation model establishing module is used for establishing a battery thermal runaway simulation model according to the data parameters;
the battery thermal runaway fault simulation module is used for simulating a battery thermal runaway fault through the test simulation platform; the test simulation platform is built by the battery thermal runaway simulation model, the synchronization model and the fault injection model.
8. The apparatus of claim 7, wherein the at least one data parameter comprises:
the battery temperature and the battery pressure value are respectively measured according to the cell voltage and the battery temperature and the battery pressure value, the gas concentration in the battery, the smoke concentration in the battery, the carbon dioxide concentration in the battery, the insulation resistance, the humidity and the solid particle concentration.
9. Computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, implements a method for simulating thermal runaway in a battery according to any one of claims 1-6.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out a method for simulating a thermal runaway of a battery as claimed in any one of claims 1 to 6.
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| CN202011204452.3A CN112380679A (en) | 2020-11-02 | 2020-11-02 | Battery thermal runaway simulation method, device, equipment and storage medium |
| PCT/CN2021/128084 WO2022089650A1 (en) | 2020-11-02 | 2021-11-02 | Battery thermal runaway simulation method and apparatus, device and storage medium |
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| CN113219340A (en) * | 2021-02-26 | 2021-08-06 | 中国第一汽车股份有限公司 | Method, device, equipment and storage medium for testing battery equalization function |
| CN113378403A (en) * | 2021-06-28 | 2021-09-10 | 中国第一汽车股份有限公司 | Simulation test modeling method, system, test method, device and storage medium |
| CN113484760A (en) * | 2021-07-12 | 2021-10-08 | 杭州华塑科技股份有限公司 | Battery thermal runaway identification method, device, equipment and storage medium |
| CN114019398A (en) * | 2021-10-29 | 2022-02-08 | 中国第一汽车股份有限公司 | Battery system thermal runaway test device and battery system thermal runaway test method |
| WO2022089650A1 (en) * | 2020-11-02 | 2022-05-05 | 中国第一汽车股份有限公司 | Battery thermal runaway simulation method and apparatus, device and storage medium |
| TWI790070B (en) * | 2021-12-28 | 2023-01-11 | 國家中山科學研究院 | Portable battery testing device |
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