CN117805626A - Thermal runaway prediction model determination method, device, electronic equipment and storage medium - Google Patents
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Abstract
The embodiment of the disclosure discloses a thermal runaway prediction model determining method, a device, electronic equipment and a storage medium, comprising the following steps: performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component; constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data; a thermal runaway prediction model is determined from the stoichiometric model. According to the technical scheme, the chemometric model is built according to the partial least square method, and the thermal runaway prediction model is determined according to the chemometric model, so that the accurate prediction of the thermal runaway of the fuel cell is realized.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of fuel cells, in particular to a thermal runaway prediction model determining method, a thermal runaway prediction model determining device, electronic equipment and a storage medium.
Background
Fuel cells are widely used in a variety of fields with their advantages of high energy density, long cycle life, high environmental protection, and the like. However, fuel cells may trigger thermal runaway during long-term charge and discharge cycles due to a variety of objective causes to produce large amounts of toxic or highly flammable gases, resulting in subsequent severe fires or explosions. Therefore, the real-time analysis of the thermal runaway gas has important significance for early warning, safety evaluation, safety management and the like of the thermal runaway of the fuel cell.
In the current safety design of fuel cells, the early warning and detecting method for the thermal runaway of the fuel cells is generally focused on arranging sensors in the cells or collecting and analyzing the voltage, current and resistance performance parameters output by the cells so as to predict the potential risk of the thermal runaway of the cells.
However, the method has the limitations of complex circuit design, insufficient detection capability, low accuracy and the like, so that various problems exist in the thermal safety analysis test of the fuel cell.
Disclosure of Invention
The embodiment of the disclosure provides a thermal runaway prediction model determining method, a device, electronic equipment and a storage medium, which realize accurate prediction of thermal runaway of a fuel cell.
In a first aspect, a thermal runaway prediction model determination method is provided, including:
performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component;
constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data;
a thermal runaway prediction model is determined from the stoichiometric model.
In a second aspect, there is provided a thermal runaway prediction model determining apparatus including:
the analysis data acquisition module is used for carrying out spectral gas analysis on gas components generated by the sample fuel cell in the thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component;
the model construction module is used for constructing a chemometric model for describing the relation between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data;
a model determination module for determining a thermal runaway prediction model from the stoichiometric model.
In a third aspect, an electronic device is provided, the electronic device comprising:
at least one processor; and;
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the thermal runaway prediction model determination method provided in the first aspect above.
In a fourth aspect, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the thermal runaway prediction model determination method provided in the first aspect of the embodiments of the present disclosure.
The embodiment of the disclosure provides a thermal runaway prediction model determining method, a device, electronic equipment and a storage medium, comprising the following steps: performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component; constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data; a thermal runaway prediction model is determined from the stoichiometric model. Compared with the prior art, the technical scheme constructs the chemometric model according to the obtained analysis data, and determines the thermal runaway prediction model according to the chemometric model, so that the accurate prediction of the thermal runaway of the fuel cell is realized.
It should be understood that the description in this section is not intended to identify key or critical features of the disclosed embodiments, nor is it intended to be used to limit the scope of the disclosed embodiments. Other features of the embodiments of the present disclosure will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a flow chart of a thermal runaway prediction model determination method provided in accordance with an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a gas detection study area of a thermal runaway overall process of a fuel cell provided in accordance with an embodiment of the present disclosure;
FIG. 3 is a flow chart of another thermal runaway prediction model determination method provided by a second embodiment of the present disclosure;
FIG. 4 is a thermal runaway gas production rate estimation model based on partial least squares provided in accordance with a second embodiment of the present disclosure;
FIG. 5 is a thermal runaway H based on partial least squares method provided in accordance with a second embodiment of the present disclosure 2 A concentration estimation model;
FIG. 6 is a thermal runaway escaping gas velocity estimation model based on partial least squares provided in accordance with a second embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a thermal runaway prediction model determining device provided in a third embodiment of the present disclosure;
fig. 8 is a schematic diagram of an electronic device for implementing an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the aspects of the embodiments of the present disclosure, a technical solution of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments, not all embodiments of the present disclosure. All other embodiments, which may be made by one of ordinary skill in the art without undue burden from the disclosed embodiments, are intended to be within the scope of the disclosed embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the embodiments of the present disclosure and the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the disclosed embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a thermal runaway prediction model determining method according to an embodiment of the present disclosure, which is applicable to a case of determining a thermal runaway prediction model, and the method may be performed by a thermal runaway prediction model determining device, which may be implemented in the form of hardware and/or software, and the thermal runaway prediction model determining device may be configured in an electronic device. As shown in fig. 1, the method includes:
s110, performing spectral gas analysis on gas components generated by the sample fuel cell in the thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component.
In this embodiment, the spectroscopic gas analysis may be a method of analyzing gas by spectroscopy, and may analyze a gas component generated by the sample fuel cell during a thermal runaway process, which may be a phenomenon in which both current and temperature increase and promote each other during charging of the sample fuel cell.
In particular, the sample fuel cell may generate gas during thermal runaway, and analysis data may be obtained by performing spectral gas analysis on the components of the gas generated by the sample fuel cell during thermal runaway, the analysis data including thermal runaway characteristics of each of the gas components, wherein the thermal runaway characteristics include a gas generation rate, a gas concentration, and a gas release rate.
S120, constructing a chemometric model for describing the relation between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to analysis data.
In this embodiment, the partial least squares method (Parital least squqres, PLS) is a mathematical optimization technique that finds the best functional match for a set of data by minimizing the sum of squares of the errors. The sum of the squares of the errors is minimized by finding absolute unknown true values using the simplest method. Many other optimization problems can also be expressed in terms of least squares by minimizing energy or maximizing entropy.
Specifically, after the analysis data is acquired, a chemometric model may be constructed by a partial least squares method, which may be used to describe the relationship between each gas component and the thermal runaway characteristic parameter.
S130, determining a thermal runaway prediction model according to the stoichiometric model.
After the determination of the stoichiometric model, a thermal runaway prediction model may be determined from the determined stoichiometric model, where the thermal runaway prediction model may predict a thermal runaway process of the sample fuel cell.
The embodiment provides a thermal runaway prediction model determining method, which comprises the following steps: performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component; constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data; and determining a thermal runaway prediction model according to the stoichiometric model, so as to realize accurate prediction of the thermal runaway of the fuel cell.
As an implementation manner of the present embodiment, the method provided by the present embodiment further includes:
and according to the detection result of the sensor on the gas component, the gas yield of the sample fuel cell in the thermal runaway process is checked.
Specifically, after the stoichiometric model of each gas component is obtained, each gas component can be detected by combining with a sensor, so as to obtain a detection result. And according to the detection result of the sensor on the gas component, checking and confirming the gas yield of the sample fuel cell in the thermal runaway process.
As another implementation of the present embodiment, before constructing the stoichiometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter using the partial least squares method according to the analysis data, the method further includes:
and carrying out Kalman filtering on the analysis data.
Specifically, after analysis data is obtained by performing spectral gas analysis on a gas component, the obtained analysis data may be subjected to kalman filtering, where the expression of the kalman filtering is as follows:
X(k)＝AX(k-1)+BU(k)+W(k)
plus the measured value of the system:
Z(k)＝HX(k)+V(k)
where X (k) is the state of the system at time k, U (k) is the control quantity of the system at time k, A and B are system parameters, A and B can be matrices for a multi-model system, Z (k) can be the measured value at time k, H can be the parameter of the measurement system, and H can be matrices for a multi-model measurement system. W (k) and V (k) represent noise of the detection process and the measurement process, respectively, and both W (k) and V (k) can be assumed to be Gaussian white noise (White Gaussian Noise), and the covariance (covarince) of both can be considered to be unchanged with the change of the system state.
Alternatively, constructing a stoichiometric model describing the relationship between each gas component and the thermal runaway characteristic parameter using the partial least squares method based on the analysis data may include:
a1 Screening, for each gas component, a combination of spectral bands and indices based on an optimal index factor as an argument from the analysis data;
specifically, after analysis data is obtained by performing spectral gas analysis on gas components, the spectral band and index combination can be subjected to dimension reduction and screening based on optimal index factors (Optimal Index Factor, OIF), and the spectral band and index combination after the screening and dimension reduction are used as model independent variables, wherein the optimal index factors can be used for measuring the importance degree of the band by adopting the equation of the three bands and the ratio of the sum of the three bands and the correlation coefficient.
b1 Determining principal components of the independent variables and the corresponding thermal runaway characteristic parameters, respectively;
specifically, after the independent variable is determined according to the analysis data, the independent variable and the principal component of the corresponding thermal runaway characteristic parameter can be determined according to the determined independent variable and the thermal runaway characteristic parameter. The principal components that determine the independent variables and the corresponding thermal runaway characteristic parameters may be obtained by determining the objective function and the projection axis at which the objective function takes a maximum value.
c1 Establishing regression equations of the independent variables, the corresponding thermal runaway characteristic parameters and the main components and calculating residual information;
specifically, after the principal components of the independent variables and the corresponding thermal runaway characteristic parameters are determined, a regression equation of the independent variables, the corresponding thermal runaway characteristic parameters, and the principal components may be established, where the regression equation may be a mathematical expression reflecting a regression relationship of one variable (dependent variable) to another variable or a group of variables (independent variables) obtained by regression analysis based on sample data.
Following the above description, after the regression equation is determined, residual information may be calculated according to the determined regression equation, where the residual information may be difference information between an actual observed value and an estimated value (fitting value), such as: the residual information may be a residual matrix.
d1 If the termination condition is not met, updating the independent variable and the corresponding thermal runaway characteristic parameter according to the residual information, and returning to execute the operations of determining the main component, establishing a regression equation and calculating a residual matrix;
it should be explained that after the residual information is determined, it may be determined whether the current prediction model state meets a termination condition, where the termination condition may be a condition that the preset prediction model is expected to reach. If the current prediction model state does not meet the termination condition, the determined residual information can be used as a new independent variable and a corresponding thermal runaway characteristic parameter, and the main component of the residual information is calculated. And establishing a regression equation of the main component of the residual information, calculating a new residual matrix corresponding to the regression equation of the main component of the residual information, and judging the state of the prediction model again.
e1 If the termination condition is satisfied, determining a corresponding stoichiometric model according to the regression equation of each principal component.
It should be noted that, if the current prediction model state satisfies the termination condition, the corresponding stoichiometric model may be determined according to the regression equation of each principal component.
The technical scheme provides a novel modeling method for carrying out early warning on thermal runaway of the fuel cell by combining a partial least square method with big data analysis. The technical scheme takes a gas spectrum technology as a core and develops a gas in-situ on-line detection method for the whole thermal runaway process of the fuel cell. Fig. 2 shows a schematic diagram of a gas detection study area of the whole process of thermal runaway of the fuel cell, and a predicted thermal runaway prediction model is established by capturing key gas markers (taking hydrogen analysis as an example as an important point). The research area is provided with 16 cells, 16 effective samples are collected in the test area, a plurality of samples are randomly selected as a modeling set to ensure scientific effectiveness, and the estimated intensity of an analysis model is verified and compared based on a partial least square method, so that the accurate prediction of the thermal runaway of the fuel cell is realized.
Example two
Fig. 3 is a flowchart of another thermal runaway prediction model determining method according to a second embodiment of the present disclosure, which is a further optimization and extension of the above embodiment. As shown in fig. 3, the method includes:
s210, performing spectral gas analysis on gas components generated by the sample fuel cell in the thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component.
Exemplary, the primary gas component of the sample fuel cell thermal runaway release is CO 2 、CO、CH 4 、C 2 H 4 、C 3 H 6 、H 2 And (3) waiting for gas. The gas production rate, the gas concentration and the gas escape rate of each gas component can be obtained by analyzing the gas.
S220, constructing a chemometric model for describing the relation between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to analysis data.
Exemplary, can be based on CO 2 、CO、CH 4 、C 2 H 4 、C 3 H 6 、H 2 The gas production rate, gas concentration and gas escape rate of the gas are used for constructing a stoichiometric model of each gas component.
S230, obtaining thermal runaway characteristic parameters of the stoichiometric model for outputting gas components generated in the thermal runaway process of the specified fuel cell, and obtaining an estimated value set.
It is known that a stoichiometric model can be obtained for the gas composition produced by a given fuel cell during thermal runaway, where the given fuel cell may be the fuel cell used for testing. After obtaining the gas components generated by the fuel cell in the thermal runaway process, the thermal runaway parameters of each gas component can be obtained according to the stoichiometric model, and the thermal runaway parameters of each gas component obtained by the stoichiometric model are combined to obtain an estimated value set.
S240, determining corresponding thermal runaway characteristic parameters according to the actual measurement values of the gas components generated in the thermal runaway process of the specified fuel cell, and obtaining an actual measurement value set.
In the process of collecting the gas component generated in the thermal runaway process of the specified fuel cell, a sensor is also required to be used for actually measuring the gas component, so as to obtain a thermal runaway parameter corresponding to the actually measured value, and an actually measured value set can be obtained according to the thermal runaway parameter corresponding to the actually measured value.
S250, comparing the estimated value set with the evaluation index of the measured value.
Specifically, the obtained set of estimated values is compared with the set of measured values according to an evaluation index including a degree of fit (R 2 ) Root mean square error (R)MSE) and relative analysis error (RPD), wherein, the fitting degree can be the degree of coincidence of the prediction result and the actual situation by checking the prediction model which is already constructed, the root mean square error can be the square root of the ratio of the square of the deviation of the prediction value and the true value to the observation times n, the deviation between the prediction result and the actual value can be measured, and the relative analysis error can be the degree of reliability used for evaluating the model.
And S260, determining the chemometric model as a thermal runaway prediction model when the evaluation index meets the condition.
Specifically, the obtained stoichiometric model may be analyzed by an evaluation index, and the evaluation index meeting conditions may include: the difference between the fitting degree and 1 is in a first setting range; the difference between the root mean square error and 0 is in a second setting range; the relative average error exceeds a set threshold.
The first setting range may be a range with a better performance of the fitting degree, the second setting range may be a range with a better performance of the root mean square error, and the setting threshold may be a setting threshold for judging a value of the relative analysis error. Illustratively, the evaluation index meeting condition may be that the fitting degree approaches 1, and the closer the fitting degree approaches 1, the stronger the fitting degree of the model is indicated; the closer the root mean square error is to 0, the stronger the fitting of the model is when the root mean square error is to 0; the set threshold may be 1.4 or 2, the model may be predicted when the relative analysis error is greater than 1.4, and the prediction effect is best when the relative analysis error is greater than 2.
Specifically, the set of estimated values and the set of measured values of each chemometric model can be compared by an evaluation index, the comparison result is evaluated according to the condition that the evaluation index meets, the evaluation result is obtained, and the chemometric model is determined to be a thermal runaway prediction model according to the evaluation result.
Taking hydrogen analysis as an example, the thermal runaway prediction model is obtained by fitting the estimated value set and the actual measured value set and comparing the fitting degree, the root mean square error and the relative analysis error of the modeling set. FIG. 4 shows a partial least squares based method according to the present embodimentThe fitting degree of the modeling set and the verification set is 0.77 and 0.76 respectively, the root mean square error is 1.05 and 1.11 respectively, and the relative analysis error is 2.1 and 1.73 respectively. FIG. 5 shows a partial least squares method based thermal runaway H of the present embodiment 2 The concentration (C) estimation model, the fitting degree of the modeling set and the verification set is respectively 0.45 and 0.3, the root mean square error is respectively 27.92 and 29.95, and the relative analysis error is respectively 1.36 and 0.84. Fig. 6 shows a thermal runaway escaping gas rate (G) estimation model based on a partial least square method according to the present embodiment, wherein the fitting degree of the modeling set and the verification set is 0.7 and 0.72, the root mean square error is 0.04 and 0.03, and the relative analysis error is 1.84 and 1.82, respectively.
The embodiment provides a thermal runaway prediction model determining method, which comprises the following steps: performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component; constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data; acquiring thermal runaway characteristic parameters of the stoichiometric model for outputting gas components generated in the thermal runaway process of the specified fuel cell, and obtaining an estimated value set; determining corresponding thermal runaway characteristic parameters according to the actual measurement values of the gas components generated by the specified fuel cell in the thermal runaway process to obtain an actual measurement value set; comparing the estimated value set with the evaluation index of the measured value; and under the condition that the evaluated index meets the condition, determining the stoichiometric model as a thermal runaway prediction model, so as to realize accurate prediction of the thermal runaway of the fuel cell.
Example III
Fig. 7 is a schematic structural diagram of a thermal runaway prediction model determining device according to a third embodiment of the present disclosure. As shown in fig. 7, the apparatus includes: an analysis data acquisition module 310, a model construction module 320, and a model determination module 330.
The analysis data acquisition module 310 is configured to perform spectral gas analysis on gas components generated by the sample fuel cell during the thermal runaway process, so as to obtain analysis data, where the analysis data includes a thermal runaway characteristic parameter of each gas component;
a model construction module 320 for constructing a stoichiometric model describing a relationship between each gas component and the thermal runaway characteristic parameter using a partial least square method according to the analysis data;
the model determination module 330 is configured to determine a thermal runaway prediction model from the stoichiometric model.
The third embodiment of the disclosure provides a thermal runaway prediction model determining device, which realizes accurate prediction of thermal runaway of a fuel cell.
Further, the device further comprises:
and the calibration device is used for calibrating the gas yield of the sample fuel cell in the thermal runaway process according to the detection result of the sensor on the gas component.
Further, the device further comprises:
and the filtering module is used for carrying out Kalman filtering on the analysis data.
Further, the model building module 320 may include:
screening a combination of spectral bands and indices based on an optimal index factor as an argument for each gas component based on the analysis data;
determining principal components of the independent variables and corresponding thermal runaway characteristic parameters respectively;
establishing regression equations of the independent variables, the corresponding thermal runaway characteristic parameters and the main components and calculating residual information;
if the termination condition is not met, updating the independent variable and the corresponding thermal runaway characteristic parameter according to the residual information, and returning to execute the operations of determining the main component, establishing a regression equation and calculating a residual matrix;
if the termination condition is satisfied, determining a corresponding stoichiometric model according to a regression equation of each principal component.
Further, the model determining module 330 may include:
acquiring thermal runaway characteristic parameters of the stoichiometric model for outputting gas components generated in the thermal runaway process of the specified fuel cell, and obtaining an estimated value set;
determining corresponding thermal runaway characteristic parameters according to the actual measurement values of the gas components generated by the specified fuel cell in the thermal runaway process to obtain an actual measurement value set;
comparing the estimated value set with the evaluation index of the measured value;
and determining the stoichiometric model as a thermal runaway prediction model in the case that the evaluation index satisfies a condition.
Further, the evaluation index includes a fitting degree, a root mean square error, and a relative analysis error.
Further, the evaluation index satisfies a condition, including:
the difference between the fitting degree and 1 is in a first setting range;
the difference between the root mean square error and 0 is in a second setting range;
the relative analysis error exceeds a set threshold.
Further, the thermal runaway characteristic parameters include gas production rate, gas concentration, and gas release rate.
The thermal runaway prediction model determining device provided by the embodiment of the disclosure can execute the thermal runaway prediction model determining method provided by any embodiment of the disclosure, and has the corresponding functional modules and beneficial effects of the executing method.
Example IV
Fig. 8 shows a schematic diagram of an electronic device 10 that may be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the embodiments of the disclosure described and/or claimed herein.
As shown in fig. 8, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microprocessor, etc. The processor 11 performs the various methods and processes described above, such as the thermal runaway prediction model determination method.
In some embodiments, the thermal runaway prediction model determination method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the thermal runaway prediction model determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the thermal runaway prediction model determination method by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of embodiments of the present disclosure may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the disclosed embodiments, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the embodiments of the present disclosure may be performed in parallel, may be performed sequentially, or may be performed in a different order, so long as the desired result of the technical solution of the embodiments of the present disclosure is achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the embodiments of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the embodiments of the present disclosure are intended to be included within the scope of the embodiments of the present disclosure.
Claims (11)
1. A thermal runaway prediction model determining method, characterized by comprising:
performing spectral gas analysis on gas components generated by the sample fuel cell in a thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component;
constructing a chemometric model for describing the relationship between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data;
a thermal runaway prediction model is determined from the stoichiometric model.
2. The method as recited in claim 1, further comprising:
and according to the detection result of the sensor on the gas component, the gas yield of the sample fuel cell in the thermal runaway process is checked.
3. The method of claim 1, further comprising, prior to constructing a stoichiometric model describing a relationship between each gas component and a thermal runaway characteristic parameter using a partial least squares method based on the analysis data:
and carrying out Kalman filtering on the analysis data.
4. The method of claim 1, wherein constructing a stoichiometric model describing the relationship between each gas component and the thermal runaway characteristic parameter using a partial least squares method based on the analytical data comprises:
screening a combination of spectral bands and indices based on an optimal index factor as an argument for each gas component based on the analysis data;
determining principal components of the independent variables and corresponding thermal runaway characteristic parameters respectively;
establishing regression equations of the independent variables, the corresponding thermal runaway characteristic parameters and the main components and calculating residual information;
if the termination condition is not met, updating the independent variable and the corresponding thermal runaway characteristic parameter according to the residual information, and returning to execute the operations of determining the main component, establishing a regression equation and calculating a residual matrix;
if the termination condition is satisfied, determining a corresponding stoichiometric model according to a regression equation of each principal component.
5. The method of claim 1, wherein determining a thermal runaway prediction model from the stoichiometric model comprises:
acquiring thermal runaway characteristic parameters of the stoichiometric model for outputting gas components generated in the thermal runaway process of the specified fuel cell, and obtaining an estimated value set;
determining corresponding thermal runaway characteristic parameters according to the actual measurement values of the gas components generated by the specified fuel cell in the thermal runaway process to obtain an actual measurement value set;
comparing the estimated value set with the evaluation index of the measured value;
and determining the stoichiometric model as a thermal runaway prediction model in the case that the evaluation index satisfies a condition.
6. The method of claim 5, wherein the step of determining the position of the probe is performed,
the evaluation index includes fitness, root mean square error, and relative analysis error.
7. The method of claim 5, wherein the evaluation index satisfies a condition, comprising:
the difference between the fitting degree and 1 is in a first setting range;
the difference between the root mean square error and 0 is in a second setting range;
the relative analysis error exceeds a set threshold.
8. The method of claim 1, wherein the thermal runaway characteristic parameters include a gas production rate, a gas concentration, and a gas release rate.
9. A thermal runaway prediction model determining device, characterized by comprising:
the analysis data acquisition module is used for carrying out spectral gas analysis on gas components generated by the sample fuel cell in the thermal runaway process to obtain analysis data, wherein the analysis data comprises thermal runaway characteristic parameters of each gas component;
the model construction module is used for constructing a chemometric model for describing the relation between each gas component and the thermal runaway characteristic parameter by adopting a partial least square method according to the analysis data;
a model determination module for determining a thermal runaway prediction model from the stoichiometric model.
10. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the thermal runaway prediction model determination method of any one of claims 1-8.
11. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the thermal runaway prediction model determination method according to any one of claims 1 to 8.
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