Electrochemical model determination method and device, electronic equipment, medium and product
By receiving battery design description information, selecting and combining data from a pre-set database to generate electrochemical models, the problem of insufficient efficiency and accuracy in determining battery electrochemical models is solved, thus achieving efficient and accurate battery design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2024-11-11
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the efficiency and accuracy of determining battery electrochemical models cannot be guaranteed. Users need to create their own models, and the material library is limited, making it difficult to match suitable models.
By receiving the design description information of the target battery, the target electrochemical model is generated by filtering and combining from the preset model database, and the correlation between the electrochemical model parameters is considered to improve the matching accuracy.
It improves the efficiency and accuracy of electrochemical model determination, is applicable to all stages of battery design and development, and simplifies the selection process of electrode materials and electrolytes.
Smart Images
Figure CN122024936A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a method and apparatus for determining an electrochemical model, electronic equipment, a medium, and a product. Background Technology
[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.
[0003] In the battery design process, it is necessary to determine the battery's electrochemical model, which will affect the battery's lifespan. Summary of the Invention
[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a method, apparatus, electronic device, medium, and product for determining an electrochemical model, thereby improving the matching accuracy of the target electrochemical model.
[0005] An embodiment of the first aspect of this application provides a method for determining an electrochemical model, comprising: receiving design description information of a target battery, the design description information including the required parameters or design parameters of the target battery; selecting electrochemical model parameters that satisfy the design description information from a preset model database based on the design description information; and combining the electrochemical model parameters to generate a target electrochemical model of the target battery.
[0006] In the technical solution of this application embodiment, by receiving the design description information of the target battery, electrochemical model parameters that meet the design description information can be screened and combined to generate the target electrochemical model of the target battery. The most suitable model can be quickly matched from a rich preset data model library with only a small number of standardized templates as input, which improves the efficiency of determining the target electrochemical model. Furthermore, since the matching strategy comprehensively considers the correlation between electrochemical model parameters, the matching accuracy of the target electrochemical model is improved.
[0007] In some embodiments, the design description information further includes the electrolyte name and electrode material name, and the preset model database further includes a preset electrochemical model library. Based on the design description information, electrochemical model parameters that meet the design description information are selected from the preset model database. This includes: selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrolyte name and electrode material name, wherein the electrodes include positive and negative electrodes. Selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrolyte name and electrode material name improves the accuracy of electrode material selection and also increases the efficiency of electrochemical model determination.
[0008] In some embodiments, selecting electrode materials that meet the design description information from a preset electrochemical model library based on the electrolyte name and electrode material name includes: determining the electrode material as the electrode material that meets the design description information in response to the preset electrochemical model library containing only one electrochemical model including the electrolyte name and electrode material name corresponding to the electrolyte and electrode material names. Based on the electrolyte name and electrode material name, selecting from the preset electrochemical model library whether there exists an electrochemical model that matches the electrolyte name with the electrode material name; if only one electrochemical model meets this condition, then the electrode material in that electrochemical model is the electrode material that meets the description information.
[0009] In some embodiments, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrolyte name and electrode material name. This includes: in response to the preset electrochemical model library containing multiple electrochemical models, each including an electrolyte and electrode material corresponding to the electrolyte name and electrode material name, determining the electrode material as the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models. Determining the electrode material as the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models improves the accuracy of the electrode material selection.
[0010] In some embodiments, electrode materials that meet the design description information are screened from a preset electrochemical model library based on the electrolyte name and electrode name. This includes: in response to the fact that none of the electrochemical models in the preset electrochemical model library include the electrolyte and electrode materials corresponding to the electrolyte name and electrode name, electrode materials that meet the design description information are screened from the preset electrochemical model library based on the electrode name. Screening electrode materials that meet the design description information from the preset electrochemical model library based on the electrode name improves the accuracy of electrode material selection.
[0011] In some embodiments, selecting electrode materials that meet the design description information from a preset electrochemical model library based on the electrode name includes: determining the electrode material as meeting the design description information in response to the preset electrochemical model library containing only one electrochemical model including the electrode material corresponding to the electrode name. This method of determining the electrode material as meeting the design description information in response to the preset electrochemical model library containing only one electrochemical model including the electrode material corresponding to the electrode name further simplifies the electrode material determination process and thus further improves the efficiency of determining the electrochemical model.
[0012] In some embodiments, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrode name. This includes: in response to the preset electrochemical model library containing multiple electrochemical models that all include electrode materials corresponding to the electrode name, determining the electrode material as the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models. Determining the electrode material as the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models improves the accuracy of the electrode material selection.
[0013] In some embodiments, selecting electrode materials that meet the design description information from a preset electrochemical model library based on the electrode name includes: in response to the preset electrochemical model library not containing electrode materials corresponding to the electrode name, determining the electrode material as an electrode material that meets the design description information based on the battery chemistry system type to which the electrode material belongs. Determining the electrode material as an electrode material that meets the design description information based on the battery chemistry system type to which the electrode material belongs makes the selected electrode material more suitable for the electrochemical model.
[0014] In some embodiments, the design description information includes the electrolyte name and the separator name, and the preset model database includes a preset material library. Based on the design description information, electrochemical model parameters that meet the design description information are selected from the preset model database. This includes selecting electrolytes and separators that meet the design description information from the preset material library based on the electrolyte name and the separator name. Selecting electrolytes and separators that meet the design description information from the preset material library using only the electrolyte name and separator name simplifies the electrolyte and separator determination process, increases accuracy, and thus improves the efficiency of electrochemical model determination.
[0015] In some embodiments, the design description information further includes electrode design parameters. Based on the design description information, electrochemical model parameters that satisfy the design description information are selected from a preset model database. This includes: selecting electrode design parameters that satisfy the design description information from a preset electrochemical model library based on the electrode design parameters. The design of electrode parameters involves complex structures and material selections; meticulous design and optimization can significantly improve battery performance.
[0016] In some embodiments, the method for determining the electrochemical model further includes: modifying the thermodynamic and kinetic parameters included in the electrochemical model based on the electrochemical model parameters in the target electrochemical model. Modifying the thermodynamic and kinetic parameters included in the electrochemical model can further improve the accuracy of the electrochemical model.
[0017] An embodiment of the second aspect of this application provides an apparatus for determining an electrochemical model. The apparatus includes: a receiving module configured to receive design description information of a target battery, the design description information including the required parameters or design parameters of the target battery; a screening module configured to screen electrochemical model parameters that satisfy the design description information from a preset model database based on the design description information; and a combination module configured to combine the electrochemical model parameters to generate a target electrochemical model of the target battery.
[0018] An embodiment of the third aspect of this application provides an electronic device, including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the program to implement any of the methods described above.
[0019] An embodiment of the fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described above.
[0020] An embodiment of the fifth aspect of this application provides a computer program product including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code, wherein when the computer-readable code is run in an electronic device, a processor in the electronic device performs any of the methods described above.
[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0023] Figure 1 This is a flowchart illustrating the method for determining the electrochemical model in some embodiments of this application. Figure 1 ;
[0024] Figure 2 This is a schematic diagram of the structure of the apparatus for determining the electrochemical model in some embodiments of this application. Figure 1 ;
[0025] Figure 3 This is a schematic diagram of the structure of the apparatus for determining the electrochemical model in some embodiments of this application. Figure 2 ;
[0026] Figure 4 This is a flowchart illustrating the method for determining the electrochemical model in some embodiments of this application. Figure 2 . Detailed Implementation
[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0033] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0035] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.
[0036] In related technologies, determining the electrochemical model of a battery typically relies on the user creating and confirming key material parameters step by step based on experience, or selecting a case from a library and modifying the corresponding parameters. However, the available material libraries or battery model databases are limited during the electrochemical model building process, making it difficult to match the model / material to the user's input. Even a rough match cannot guarantee accuracy. The accuracy of the electrochemical model is entirely dependent on the user. In other words, neither efficiency nor accuracy can be guaranteed when the user determines the electrochemical model.
[0037] Based on this, this application discloses a method for determining an electrochemical model, comprising: receiving design description information of a target battery, the design description information including the required parameters or design parameters of the target battery; selecting electrochemical model parameters that satisfy the design description information from a preset model database based on the design description information; and combining the electrochemical model parameters to generate a target electrochemical model for the target battery. By receiving the design description information of the target battery, electrochemical model parameters that satisfy the design description information can be selected and combined to generate a target electrochemical model for the target battery. This allows for rapid matching of the most suitable model from a rich preset data model library with only a small number of standardized templates as input, improving the efficiency of determining the target electrochemical model. Furthermore, because the matching strategy comprehensively considers the correlation between electrochemical model parameters, it improves the matching accuracy of the target electrochemical model.
[0038] The method for determining the electrochemical model disclosed in this application is applicable not only to the determination of the electrochemical model during the user requirement stage before battery design and development, but also to the updating of battery design schemes for completed historical battery designs.
[0039] The batteries mentioned above can be battery products such as battery modules, battery packs, or battery cells. Obtaining an electrochemical model of a battery that meets user needs helps to improve the rationality of battery design solutions.
[0040] This application provides a method for determining an electrochemical model. Figure 1 This is a flowchart illustrating the method for determining the electrochemical model in some embodiments of this application. Figure 1 ,like Figure 1 As shown, the method for determining the electrochemical model includes: step S110, receiving the design description information of the target battery, which includes the required parameters or design parameters of the target battery; step S120, selecting electrochemical model parameters that meet the design description information from a preset model database based on the design description information; and step S130, combining the electrochemical model parameters to generate the target electrochemical model of the target battery.
[0041] The execution subject of this application embodiment can be an electronic device, which can be, but is not limited to, a terminal or a server.
[0042] Step S110: Receive the design description information of the target battery, which includes the required parameters or design parameters of the target battery.
[0043] In this embodiment, the target battery refers to the battery used in determining the electrochemical model. The target battery does not specifically refer to a particular fixed battery. For example, the target battery could be an energy storage battery.
[0044] In this embodiment, the design description information can be either requirement parameters or design parameters. The requirement parameters are the customer's descriptions of various battery performance requirements input before battery solution design, based on the battery application scenario. The design parameters are the battery solution design content already completed based on the customer's requirements. Compared to design parameters, requirement parameters mostly describe battery parameters in a macroscopic way, while design parameters describe battery parameters more specifically, such as what positive electrode material, negative electrode material, electrolyte, and separator are used.
[0045] Step S120: Based on the design description information, select electrochemical model parameters that meet the design description information from the preset model database.
[0046] In this embodiment, the preset data model library can be divided into a preset material library and a preset electrochemical model library according to the different stored contents. The preset material library stores the physical properties of materials such as electrolytes and separators, and each material can contain multiple material types. The preset electrochemical model library stores multiple complete electrochemical models and the corresponding electrolyte, positive electrode material, negative electrode material, separator, and electrode design parameters for each electrochemical model.
[0047] The design description information, including both requirement parameters and design parameters, consists of lengthy textual descriptions. These can be analyzed to extract suitable electrochemical model parameters for benchmarking and selection. For example, key fields can be extracted from the design description information to determine the electrochemical model parameters. These key fields may include the names of the positive electrode material, negative electrode material, separator material, electrolyte, and battery design parameters. In one embodiment, the positive / negative electrode or electrolyte materials used in the battery design parameters may not be single materials. For instance, the positive electrode material may be a uniform mixture of materials A and B (mass ratio a:b), and the negative electrode material may be a uniform mixture of materials C and D or a layered coating design (mass ratio c:d). In this case, the key fields for each material (such as the name / ratio / capacity of the positive and negative electrode materials, and the name / injection ratio of the electrolyte) need to be extracted simultaneously.
[0048] The selected electrochemical model parameters represent the specific requirements for the positive and negative electrode properties or a certain performance index of the battery. Electrochemical model parameters can include positive electrode materials, negative electrode materials, separator materials, electrolytes, and electrode design parameters. Electrode design parameters can include key electrode design information such as positive and negative electrode compaction density, coating weight per unit area, designed electrode thickness, full cell capacity, and the designed voltage range.
[0049] Step S130: Based on the electrochemical model parameters, generate the target electrochemical model of the target battery.
[0050] By combining electrochemical models of positive electrode materials, negative electrode materials, separator materials, electrolytes, and battery design parameters, a target electrochemical model for the target battery can be generated.
[0051] In this embodiment, by receiving the design description information of the target battery, electrochemical model parameters that meet the design description information can be screened and combined to generate the target electrochemical model of the target battery. The most suitable model can be quickly matched from a rich preset data model library with only a small number of standardized templates as input, which improves the efficiency of determining the target electrochemical model. Furthermore, since the matching strategy comprehensively considers the correlation between electrochemical model parameters, the matching accuracy of the target electrochemical model is improved.
[0052] According to some embodiments of this application, the design description information also includes the electrolyte name and the electrode material name, and the preset model database also includes a preset electrochemical model library. Based on the design description information, electrochemical model parameters that meet the design description information are selected from the preset model database, including: based on the electrolyte name and the electrode material name, electrode materials that meet the design description information are selected from the preset electrochemical model library, wherein the electrodes include positive electrodes and negative electrodes.
[0053] In the embodiments of this application, since some properties of the electrode material are closely related to the electrolyte it is paired with, for example, when the same electrode material is paired with different types of electrolytes, the different compositions of the different types of electrolytes will result in different interfaces formed by the reaction between the electrode material and the electrolyte, which will affect the electrode's interfacial charge transfer capability. Therefore, when determining the electrode material, the electrode material can be determined according to the combination of the electrode material and the electrolyte.
[0054] The preset electrochemical model library can include multiple complete electrochemical models, as well as the corresponding electrolytes, positive electrode materials, negative electrode materials, separators, and electrode design parameters for each electrochemical model.
[0055] When determining electrode materials, the process begins by selecting from a pre-defined electrochemical model library based on the electrolyte name and electrode material name. If a single electrochemical model satisfies this condition, its electrode material is considered the one that meets the description criteria. If multiple models satisfy this condition, the model with the highest accuracy is selected. The accuracy of the electrochemical model can be pre-marked during model creation. Higher accuracy indicates higher quality test data and more accurate initial material parameters, making the included parameters more reliable. For example, thermodynamic parameters can be calibrated using open-circuit voltage-state-of-charge curves at equilibrium, and kinetic parameters can be calibrated using polarized test data (typically time-current-voltage response curves).
[0056] If no electrochemical model exists in the preset electrochemical model library that matches both the electrolyte name and the electrode material name, then the library will be used to select electrochemical models that match the electrode material name. If only one model meets this condition, the electrode material in that model is considered the one that satisfies the description. If multiple models meet this condition, the model with the highest accuracy will be selected as the electrode material. If no model meets this condition, the electrode material will be determined based on the battery chemistry system to which it belongs.
[0057] In this embodiment, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrolyte name and electrode material name, which improves the accuracy of electrode materials and also improves the efficiency of determining the electrochemical model.
[0058] According to some embodiments of this application, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrolyte name and the electrode material name. This includes: in response to the preset electrochemical model library containing only one electrochemical model including the electrolyte name and the electrode material corresponding to the electrode material name, determining the electrode material as the electrode material that meets the design description information.
[0059] In this embodiment of the application, based on the electrolyte name and the electrode material name, an electrochemical model is selected from a preset electrochemical model library to determine if there exists an electrochemical model that matches the electrolyte name and the electrode material name. If only one electrochemical model meets this condition, then the electrode material in that electrochemical model is the electrode material that meets the description information.
[0060] In this embodiment of the application, in response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrolyte name and the electrode material name corresponding to the electrolyte and electrode material, the electrode material is determined to be the electrode material that meets the design description information, which simplifies the electrode material determination process and thus improves the determination efficiency of the electrochemical model.
[0061] According to some embodiments of this application, electrode materials that meet the design description information are screened from a preset electrochemical model library based on the electrolyte name and electrode material name. This includes: in response to the preset electrochemical model library containing multiple electrochemical models that all include electrolytes and electrode materials corresponding to electrolyte names and electrode material names, the electrode material is determined to be an electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0062] Based on the electrolyte name and electrode material name, a screening process is performed to determine if an electrochemical model exists that matches both the electrolyte name and the electrode material name. If multiple electrochemical models meet this condition, the electrode material from the electrochemical model with the highest accuracy is selected as the electrode material, prioritizing the models based on their accuracy.
[0063] The accuracy of an electrochemical model can be marked in advance when the model is established. The higher the accuracy of the electrochemical model, the higher the quality of the test data used during the calibration of the model and the higher the accuracy of the initial material parameters, and the more reliable the parameters it includes.
[0064] In this embodiment, based on the accuracy priority of multiple electrochemical models, the electrode material is determined to be the electrode material that meets the design description information, thereby improving the accuracy of the electrode material.
[0065] According to some embodiments of this application, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrolyte name and electrode name. This includes: in response to the fact that none of the electrochemical models in the preset electrochemical model library include the electrolyte and electrode materials corresponding to the electrolyte name and electrode name, electrode materials that meet the design description information are selected from the preset electrochemical model library based on the electrode name.
[0066] Based on the electrolyte name and electrode material name, an electrochemical model is selected from a pre-defined electrochemical model library to match the electrolyte name with the corresponding electrode material. If no such model exists in the library, an electrochemical model matching the electrode material is selected. If only one model meets this condition, the electrode material in that model is considered the correct electrode material. If multiple models meet this condition, the model with the highest accuracy is selected as the correct electrode material.
[0067] In this embodiment, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrode name, thereby improving the accuracy of electrode materials.
[0068] According to some embodiments of this application, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrode name, including: in response to the preset electrochemical model library containing only one electrochemical model including the electrode material corresponding to the electrode name, determining the electrode material as the electrode material that meets the design description information.
[0069] Based on the electrolyte name and electrode material name, an electrochemical model is selected from a pre-defined electrochemical model library to determine if there exists an electrochemical model that matches both the electrolyte name and the electrode material. If no electrochemical model matching both the electrolyte name and the electrode material exists in the pre-defined electrochemical model library, then an electrochemical model matching the electrode material is selected from the pre-defined electrochemical model library. If only one electrochemical model meets this condition, then the electrode material in that electrochemical model is the electrode material that satisfies the description information.
[0070] In this embodiment of the application, in response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrode material corresponding to the electrode name, the electrode material is determined to be the electrode material that meets the design description information, which further simplifies the process of determining the electrode material and thus further improves the efficiency of determining the electrochemical model.
[0071] According to some embodiments of this application, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrode name, including: in response to the preset electrochemical model library containing multiple electrochemical models that all include electrode materials corresponding to the electrode name, the electrode material is determined to be an electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0072] Based on the electrolyte name and electrode material name, an electrochemical model matching the electrolyte name and electrode material name is selected from a pre-defined electrochemical model library. If no such model exists in the library, an electrochemical model matching the electrode material name is selected. If multiple models meet this condition, the model with the highest accuracy is chosen as the electrode material.
[0073] In this embodiment, based on the accuracy priority of multiple electrochemical models, the electrode material is determined to be the electrode material that meets the design description information, thereby improving the accuracy of the electrode material.
[0074] According to some embodiments of this application, electrode materials that meet the design description information are selected from a preset electrochemical model library based on the electrode name, including: in response to the preset electrochemical model library not containing electrode materials corresponding to the electrode name, determining the electrode material as an electrode material that meets the design description information based on the battery chemical system type to which the electrode material belongs.
[0075] Based on the electrolyte name and electrode material name, an electrochemical model matching the electrolyte name and electrode material name is selected from a pre-defined electrochemical model library. If no such model exists, an electrochemical model matching the electrode material name is selected from the library. If no model exists, an electrochemical model matching the electrode material name is selected. If all electrochemical models meet this condition, the electrode material can be determined based on its battery chemistry system type. For example, the battery chemistry system type of the electrode material could include silicon-carbon or lithium metal.
[0076] In this embodiment, the electrode material is determined to be an electrode material that meets the design description information based on the battery chemical system type to which the electrode material belongs, so that the selected electrode material is more suitable for the electrochemical model.
[0077] According to some embodiments of this application, the design description information includes the name of the electrolyte and the name of the separator, and the preset model database includes a preset material library. Based on the design description information, electrochemical model parameters that meet the design description information are selected from the preset model database, including: selecting electrolytes and separators that meet the design description information from the preset material library based on the name of the electrolyte and the name of the separator.
[0078] In this embodiment of the application, the preset data model library may include a preset material library, which is used to store the physical property parameters of materials such as electrolytes and separators, and each material may include multiple material types.
[0079] Since the properties of electrolyte and separator materials only include the properties of the materials themselves, they are not closely related to the design matching. That is, the combination of electrolyte or separator with different positive or negative electrode materials will not affect the properties of the electrolyte itself (such as the conductivity of the electrolyte at different temperatures, the diffusion coefficient of the electrolyte, etc.) or the properties of the separator itself (such as the separator thickness, porosity, tortuosity, etc.). They can be matched directly according to the material name.
[0080] In this embodiment, electrolytes and separators that meet the design description information are selected from a preset material library by using the names of the electrolyte and the separator, making the determination process of electrolyte and separator simple and accurate, thereby improving the efficiency of determining the electrochemical model.
[0081] According to some embodiments of this application, the design description information also includes electrode design parameters. Based on the design description information, electrochemical model parameters that meet the design description information are selected from a preset model database, including: based on the electrode design parameters, selecting electrode design parameters that meet the design description information from a preset electrochemical model library.
[0082] Once the positive electrode material, negative electrode material, electrolyte, and separator are determined, electrode design parameters that meet the description information can be selected from a pre-defined electrochemical model library. Electrode design parameters may include key electrode design information such as positive and negative electrode compaction density, coating weight per unit area, designed electrode thickness, full cell capacity, and designed voltage range.
[0083] In this embodiment, electrode design parameters that meet the design description information are selected from a preset electrochemical model library based on the electrode design parameters. The design of electrode parameters involves complex structure and material selection. Through fine design and optimization, the performance of the battery can be significantly improved.
[0084] According to some embodiments of this application, the method for determining the electrochemical model further includes: modifying the thermodynamic and kinetic parameters included in the electrochemical model based on the electrochemical model parameters in the target electrochemical model.
[0085] In the embodiments of this application, the thermodynamic parameters are mainly related to the theoretical design capacity of the battery formed by the combination of positive and negative electrode materials in the non-polarized state. The theoretical capacity is affected by the matching relationship between the positive and negative electrode materials. The thermodynamic parameters may include the maximum and minimum lithium intercalation amounts of the positive and negative electrodes, the efficiency relative to the theoretical specific capacity of the materials, and the equilibrium potentials of the positive and negative electrode materials.
[0086] The specific process for correcting the thermodynamic parameters is as follows: When both the matched positive and negative electrode materials are single materials, or when they are mixed materials but the mixed material can be considered a new material, the equilibrium potential curves of the positive and negative electrode materials in the thermodynamic parameters do not need to be modified, and the efficiency of the positive and negative electrode materials relative to the theoretical specific capacity can be considered unchanged. Based on the equilibrium potential curves of the positive and negative electrode materials and the design voltage range of the new model (upper voltage limit + lower voltage limit), the equilibrium potential curves of the positive and negative electrodes are automatically determined by shifting them left and right to determine the minimum lithium intercalation capacity of the positive electrode and the maximum lithium intercalation capacity of the negative electrode corresponding to the upper voltage limit, and the maximum lithium intercalation capacity of the positive electrode and the minimum lithium intercalation capacity of the negative electrode corresponding to the lower voltage limit. When the matched positive or negative electrode materials cannot be considered as single materials, the equilibrium potential curves of the positive and negative electrode materials in the thermodynamic parameters need to be assembled based on the equilibrium potential curves of the single materials and the theoretical specific capacity.
[0087] Kinetic parameters may include chemical reaction rate constants (related to the electrolyte, which affects film formation on the positive and negative electrode surfaces, thus affecting reactivity) characterizing the intrinsic reactivity of the positive and negative electrode materials; solid-phase diffusion coefficients characterizing the bulk lithium-ion diffusion capability of the positive and negative electrode materials; tortuosity (t) and Brug coefficients characterizing the tortuosity of the electrode pores; and electrolyte conductivity, lithium-ion transference number, and liquid-phase diffusion coefficients, which are related to the liquid-phase mass transfer of the electrolyte.
[0088] The conductivity, lithium-ion transport number, and liquid-phase diffusion coefficient of the electrolyte are not affected by the positive and negative electrode materials or electrode design (such as compaction density), and no further modifications are needed after recommendations based on the electrolyte material name. In porous electrodes, due to the influence of porosity / torsional density, the effective conductivity and effective liquid-phase diffusion coefficient in the actual electrode liquid phase are usually lower than the conductivity and diffusion coefficient of the electrolyte itself. The ratio between the two is related to porosity and tortuosity (ratio = porosity^Brug coefficient). The theoretical porosity can be directly calculated by the formula (porosity = 1 - material compaction density / true density). For the same negative or positive electrode material, the relationship between the Brug coefficient, porosity, and compaction density can be obtained through testing as a functional relationship. This functional relationship is built into the database. When generating a new model, it is necessary to convert the compaction density of the old model to the compaction density of the new model to obtain a Brug coefficient under the new compaction density.
[0089] The chemical reaction rate constant, which characterizes the intrinsic reactivity of positive and negative electrode materials, is highly correlated with the electrolyte (especially the electrochemical reaction rate constant of the negative electrode material). Therefore, when assembling the model, it is necessary to ensure that the negative electrode material recommended by the model with the same negative electrode + electrolyte and the positive electrode material recommended by the model with the same positive electrode + electrolyte are used as much as possible.
[0090] In this embodiment of the application, the accuracy of the electrochemical model can be further improved by modifying the thermodynamic and kinetic parameters included in the electrochemical model.
[0091] This application provides an apparatus for determining an electrochemical model. Figure 2 This is a schematic diagram of the structure of the apparatus for determining the electrochemical model in some embodiments of this application. Figure 1 ,like Figure 2 As shown, the electrochemical model determination device includes: a receiving module 210, configured to receive design description information of the target battery, the design description information including the target battery's required parameters or design parameters; a screening module 220, configured to screen electrochemical model parameters that meet the design description information from a preset model database; and a combination module 230, configured to combine the electrochemical model parameters to generate a target electrochemical model of the target battery.
[0092] In some embodiments, the design description information includes the electrolyte name and the electrode material name, and the preset model database includes a preset electrochemical model library; the screening module 220 includes an electrode material determination unit, configured to screen electrode materials that meet the design description information from the preset electrochemical model library according to the electrolyte name and the electrode material name, wherein the electrode includes a positive electrode and a negative electrode.
[0093] In some embodiments, the screening module 220 is configured to determine the electrode material as an electrode material that satisfies the design description information in response to a preset electrochemical model library containing only one electrochemical model, including the electrolyte name and electrode material name.
[0094] In some embodiments, the screening module 220 is configured to, in response to a preset electrochemical model library containing multiple electrochemical models, each including an electrolyte name and an electrode material name corresponding to an electrolyte and an electrode material, determine an electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0095] In some embodiments, the screening module 220 is configured to, in response to the fact that none of the electrochemical models in the preset electrochemical model library include electrolytes and electrode materials corresponding to electrolyte names and electrode names, select electrode materials that meet the design description information from the preset electrochemical model library based on the electrode name.
[0096] In some embodiments, the screening module 220 is configured to determine the electrode material as an electrode material that satisfies the design description information in response to a preset electrochemical model library containing only one electrochemical model including the electrode material corresponding to the electrode name.
[0097] In some embodiments, the screening module 220 is configured to, in response to a preset electrochemical model library containing multiple electrochemical models that all include electrode materials corresponding to electrode names, determine an electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0098] In some embodiments, the screening module 220 is configured to, in response to the fact that the electrode material corresponding to the electrode name is not included in the preset electrochemical model library, determine the electrode material as an electrode material that meets the design description information based on the battery chemistry system type to which the electrode material belongs.
[0099] In some embodiments, the design description information further includes the electrolyte name and the separator name, the preset model database further includes a preset material library, and the screening module 220 includes an electrolyte and separator determination unit, configured to screen electrolytes and separators that meet the design description information from the preset material library based on the electrolyte name and the separator name.
[0100] In some embodiments, the design description information further includes electrode design parameters; the screening module 220 includes: an electrode design parameter determination unit, which selects electrode design parameters that meet the design description information from a preset electrochemical model library based on the electrode design parameters.
[0101] In some embodiments, Figure 3 This is a schematic diagram of the structure of the apparatus for determining the electrochemical model in some embodiments of this application. Figure 2 ,like Figure 3 As shown, the device for determining the electrochemical model also includes a correction module 240, which is configured to correct the thermodynamic and kinetic parameters included in the electrochemical model based on the electrochemical model parameters in the target electrochemical model.
[0102] According to another aspect of this application, an electronic device is also provided, including a memory and a processor, wherein the memory is used to store computer-executable instructions; and the processor is used to access the memory and execute the computer-executable instructions to perform the operations in any of the methods in the foregoing embodiments.
[0103] In one embodiment, the processor can be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods and steps disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.
[0104] In one embodiment, the memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.
[0105] According to another aspect of this application, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the method of any of the foregoing embodiments.
[0106] According to another aspect of this application, a computer program product is also provided, including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code, wherein when the computer-readable code is run in an electronic device, a processor in the electronic device executes the method implementing any of the foregoing embodiments.
[0107] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.
[0108] According to one embodiment of this application, the electrochemical model can be determined by the following method.
[0109] Figure 4 This is a flowchart illustrating the method for determining the electrochemical model in some embodiments of this application. Figure 2 .like Figure 4 As shown, the method includes:
[0110] Step S401: Receive the design description information of the target battery. The design description information includes the required parameters or design parameters of the target battery. The design description information includes the electrolyte name, electrode material name, electrolyte name, separator name, and electrode design parameters.
[0111] Step S402: In response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrolyte name and electrode material name, the electrode material is determined to be the electrode material that meets the design description information.
[0112] Step S403: In response to the fact that the preset electrochemical model library contains multiple electrochemical models, each of which includes electrolyte name and electrode material name, the electrode material is determined to be the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0113] Step S404: In response to the fact that none of the electrochemical models in the preset electrochemical model library include electrolytes and electrode materials corresponding to electrolyte names and electrode names, select electrode materials that meet the design description information from the preset electrochemical model library according to the electrode name.
[0114] Step S405: In response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrode material corresponding to the electrode name, determine that the electrode material is the electrode material that meets the design description information.
[0115] Step S406: In response to the fact that the preset electrochemical model library contains multiple electrochemical models, all of which include electrode materials corresponding to electrode names, the electrode material is determined to be the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
[0116] Step S407: Select electrolytes and separators that meet the design description information from the preset material library according to the electrolyte name and separator name.
[0117] Step S408: Based on the electrode design parameters, select electrode design parameters that meet the design description information from the preset electrochemical model library.
[0118] Step S409: Based on the electrochemical model parameters, combine to generate the target electrochemical model of the target battery.
[0119] Step S410: Based on the electrochemical model parameters in the target electrochemical model, modify the thermodynamic and kinetic parameters included in the electrochemical model.
[0120] The steps S402 to S407 above have no specific order; they can be executed simultaneously or one step can be executed at a time.
[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A method for determining an electrochemical model, characterized in that, The method includes: Receive design description information of the target battery, the design description information including the required parameters of the target battery or the design parameters of the target battery; Based on the design description information, electrochemical model parameters that meet the design description information are selected from the preset model database; Based on the electrochemical model parameters, a target electrochemical model for the target battery is generated.
2. The method according to claim 1, characterized in that, The design description information includes the electrolyte name and electrode material name, and the preset model database includes a preset electrochemical model library; the step of selecting electrochemical model parameters from the preset model database that satisfy the design description information includes: Based on the name of the electrolyte and the name of the electrode material, electrode materials that meet the design description information are selected from the preset electrochemical model library, wherein the electrode includes a positive electrode and a negative electrode.
3. The method according to claim 2, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrolyte name and the electrode material name includes: In response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrolyte name and the electrode material name, the electrode material is determined to be an electrode material that satisfies the design description information.
4. The method according to claim 2, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrolyte name and the electrode material name includes: In response to the fact that the preset electrochemical model library contains multiple electrochemical models, all of which include the electrolyte name and the electrode material name corresponding to the electrolyte and electrode material, the electrode material is determined to be the electrode material that satisfies the design description information based on the accuracy priority of the multiple electrochemical models.
5. The method according to claim 2, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrolyte name and the electrode name includes: Since none of the electrochemical models in the preset electrochemical model library include the electrolyte and electrode materials corresponding to the electrolyte name and the electrode name, electrode materials that meet the design description information are selected from the preset electrochemical model library according to the electrode name.
6. The method according to claim 5, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrode name includes: In response to the fact that the preset electrochemical model library contains only one electrochemical model including the electrode material corresponding to the electrode name, the electrode material is determined to be the electrode material that satisfies the design description information.
7. The method according to claim 5, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrode name includes: In response to the fact that the preset electrochemical model library contains multiple electrochemical models that all include the electrode material corresponding to the electrode name, the electrode material is determined to be the electrode material that meets the design description information based on the accuracy priority of the multiple electrochemical models.
8. The method according to claim 5, characterized in that, The step of selecting electrode materials that meet the design description information from the preset electrochemical model library based on the electrode name includes: In response to the fact that the electrode material corresponding to the electrode name is not included in the preset electrochemical model library, the electrode material is determined to be an electrode material that satisfies the design description information based on the battery chemistry system type to which the electrode material belongs.
9. The method according to claim 2, characterized in that, The design description information also includes the electrolyte name and the separator name. The preset model database also includes a preset material library. The step of selecting electrochemical model parameters from the preset model database that satisfy the design description information includes: Based on the electrolyte name and the separator name, electrolytes and separators that meet the design description information are selected from the preset material library.
10. The method according to claim 9, characterized in that, The design description information also includes electrode design parameters; the step of selecting electrochemical model parameters that satisfy the design description information from a preset model database based on the design description information includes: Based on the electrode design parameters, electrode design parameters that meet the design description information are selected from the preset electrochemical model library.
11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: Based on the electrochemical model parameters in the target electrochemical model, the thermodynamic and kinetic parameters included in the electrochemical model are modified.
12. An apparatus for determining an electrochemical model, characterized in that, The device includes: The receiving module is configured to receive design description information of a target battery, the design description information including the requirement parameters of the target battery or the design parameters of the target battery; The filtering module is configured to filter electrochemical model parameters that satisfy the design description information from a preset model database based on the design description information. The combination module is configured to combine and generate a target electrochemical model of the target battery based on the electrochemical model parameters.
13. An electronic device, characterized in that, include: At least one processor; as well as At least one memory communicatively connected to the at least one processor, the at least one memory storing instructions that, when executed individually or jointly by the at least one processor, cause the computing device to perform the method of any one of claims 1 to 11.
14. A computer-readable storage medium, characterized in that, The device stores instructions that, when executed individually or jointly by one or more processors of the computing device, cause the computing device to perform the method of any one of claims 1 to 11.
15. A computer program product, characterized in that, Includes instructions that, when executed individually or jointly by one or more processors of a computing device, cause the computing device to perform the method of any one of claims 1 to 11.