Equivalent modeling methods, electrical component selection methods, and devices, equipment, and media

Abstract

This disclosure relates to an equivalent modeling method, an electrical component selection method and apparatus, equipment and medium. The equivalent modeling method includes: obtaining the electrical component parameters of electrical components in an electrical device; determining a three-dimensional constant cross-sectional configuration for replacing the electrical component and a three-dimensional joint configuration for the electrical component's joints, and equivalently replacing the electrical component to obtain a simplified electrical component model; determining the equivalent parameters of the electrical component based on the electrical component parameters and the simplified electrical component model, and assigning the equivalent parameters to the simplified electrical component model to obtain an equivalent electrical component model; and establishing a thermoelectric coupling simulation equivalent model of the electrical device based on the equivalent electrical component model. This effectively improves the efficiency of equivalent modeling for thermoelectric coupling simulation of electrical devices.

Description

Technical Field

[0001] This disclosure relates to the field of electrical equipment technology, and in particular to an equivalent modeling method, an electrical component selection method and apparatus, equipment and medium. Background Technology

[0002] During the charge and discharge cycle of electrical equipment such as lithium-ion batteries, in addition to the heat generated by the battery itself, the connectors and electrical components in the battery pack also generate heat due to the current passing through them. When the charge and discharge rate is large, this part of the heat cannot be ignored, and the temperature rise of the electrical components needs to be checked to ensure that the electrical components are in a comfortable operating temperature.

[0003] Currently, the commonly used simulation modeling technique is to use thermo-electric coupling simulation modeling technology to establish detailed electrical component simulation models or to separate the electrical components and connectors into thermo-electric coupling models for simulation, so as to use the thermo-electric coupling simulation model of the electrical components to verify whether the electrical components are in a comfortable operating temperature.

[0004] Existing technologies for thermoelectric coupling simulation modeling of battery pack systems often suffer from problems such as overly complex electrical component geometry and incomplete material parameters. This results in a large number of details in the detailed electrical component simulation model, leading to a large model size and low modeling efficiency. Furthermore, separating the electrical components from the connecting bars in the modeling process results in numerous boundary conditions, which in turn increases the workload and reduces modeling efficiency. Summary of the Invention

[0005] In view of this, this disclosure proposes an equivalent modeling method, an electrical component selection method, and a device, equipment, and medium that can simplify the modeling of electrical components in electrical equipment, resulting in a smaller model size, reduced modeling workload, and thus improved efficiency of equivalent modeling for thermoelectric coupling simulation of the entire electrical equipment.

[0006] According to one aspect of this disclosure, a thermo-electric coupling simulation equivalent modeling method is provided for electrical equipment, the electrical equipment including multiple electrical components, the equivalent modeling method comprising: obtaining electrical component parameters of the electrical components in the electrical equipment; determining a three-dimensional constant cross-sectional configuration for replacing the electrical components and a three-dimensional joint configuration for the joints of the electrical components, and using the three-dimensional constant cross-sectional configuration and the three-dimensional joint configuration of the electrical components to equivalently replace the electrical components, thereby obtaining a simplified electrical component model of the electrical components; determining equivalent parameters of the electrical components based on the electrical component parameters and the simplified electrical component model of the electrical components, and assigning the equivalent parameters of the electrical components to the simplified electrical component model of the electrical components, thereby obtaining an equivalent electrical component model of the electrical components; and establishing a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent electrical component model of the electrical components.

[0007] In one possible implementation, the electrical component parameters include: the overall reference mass and overall reference resistance of the electrical component under reference operating conditions, the joint mass and specific heat capacity of the electrical component, the reference current, operating time, and reference temperature rise of the electrical component; the equivalent parameters include at least one of the following: equivalent specific heat capacity, equivalent density, equivalent resistivity, equivalent thermal conductivity, and equivalent convective heat transfer coefficient; the electrical equipment is a battery pack.

[0008] In one possible implementation, establishing a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical component includes: performing thermo-electric coupling simulation calculations based on the equivalent model of the electrical component to obtain the thermo-electric coupling simulation calculation results of the equivalent model of the electrical component, wherein the thermo-electric coupling simulation calculation results include: the maximum voltage, minimum voltage, and average temperature rise of the equivalent model of the electrical component; correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermo-electric coupling simulation calculation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component to obtain a target equivalent model of the electrical component; and establishing a thermo-electric coupling simulation equivalent model of the electrical equipment based on the target equivalent model of the electrical component.

[0009] In one possible implementation, the step of correcting the equivalent parameters assigned to the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: for any equivalent model of the electrical component, determining the simulation voltage of the equivalent model of the electrical component based on the maximum and minimum voltages of the equivalent model of the electrical component, and determining the electrical component's reference current based on the simulation voltage and the reference current of the electrical component. The simulation resistance of the electrical component equivalent model of the gas component; if the deviation between the simulation resistance and the reference resistance of the electrical component exceeds a first specified range, the equivalent resistivity of the electrical component is recalculated based on the size information of the simulation resistance and the three-dimensional equal cross-sectional configuration of the electrical component; based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the electrical component equivalent model of the electrical component is corrected until the deviation between the simulation resistance of the electrical component equivalent model of the electrical component and the reference resistance of the electrical component is within the first specified range, thus obtaining the target electrical component equivalent model of the electrical component.

[0010] In one possible implementation, the step of correcting the equivalent parameters assigned to the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: for any equivalent model of the electrical component, if the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds a second specified range, and the average temperature rise of the equivalent model of the electrical component is greater than the reference temperature rise of the electrical component, increasing the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component until the target temperature rise is reached. If the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within a second specified range, a target equivalent model of the electrical component is obtained; or, if the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds the second specified range, and the average temperature rise of the equivalent model of the electrical component is less than the reference temperature rise of the electrical component, the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component is reduced until the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within the second specified range, a target equivalent model of the electrical component is obtained.

[0011] In one possible implementation, determining the equivalent parameters of the electrical component based on its electrical component parameters and a simplified model includes: for any electrical component, determining the equivalent specific heat capacity of the electrical component based on its overall reference mass and reference resistance, its connector mass and specific heat capacity, and its reference current, operating time, and reference temperature rise; determining the equivalent density of the electrical component based on its reference mass, connector mass, and dimensional information of its three-dimensional isotropic cross-section configuration; and determining the equivalent resistivity of the electrical component based on its reference resistance and dimensional information of its three-dimensional isotropic cross-section configuration.

[0012] According to another aspect of this disclosure, a method for selecting electrical components of an electrical device is provided, including the equivalent modeling method. The method further includes: obtaining a preset operating temperature range of the electrical component in the electrical device; determining the simulated operating temperature of the electrical component under a reference operating condition based on the thermoelectric coupling simulation equivalent model of the electrical device; and determining that the electrical component in the electrical device is a suitable electrical component if the simulated operating temperature of the electrical component under the reference operating condition is within the preset operating temperature range of the electrical component.

[0013] In one possible implementation, the electrical component selection method further includes: if any electrical component in the thermoelectric coupling simulation equivalent model has a simulated operating temperature exceeding a preset operating temperature range under reference operating conditions, replacing the electrical component whose simulated operating temperature exceeds the preset operating temperature range, and determining the equivalent parameters of the replaced electrical component based on the electrical component parameters of the replaced electrical component; updating the thermoelectric coupling simulation equivalent model of the electrical equipment using the equivalent parameters of the replaced electrical component, until the simulated operating temperature of the electrical component under reference operating conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical component.

[0014] According to another aspect of this disclosure, a thermo-electric coupling simulation equivalent modeling apparatus for an electrical device is provided. The electrical device includes multiple electrical components. The apparatus includes: an acquisition module for acquiring electrical component parameters of the electrical components in the electrical device; an equivalence module for determining a three-dimensional constant cross-sectional configuration for replacing the electrical components and a three-dimensional joint configuration for the joints of the electrical components, and using the three-dimensional constant cross-sectional configuration and the three-dimensional joint configuration of the electrical components to equivalently replace the electrical components, thereby obtaining a simplified electrical component model; an electrical component modeling module for determining equivalent parameters of the electrical components based on the electrical component parameters and the simplified electrical component model, and assigning the equivalent parameters of the electrical components to the simplified electrical component model, thereby obtaining an equivalent electrical component model; and an electrical device modeling module for establishing a thermo-electric coupling simulation equivalent model of the electrical device based on the equivalent electrical component model.

[0015] According to another aspect of this disclosure, an electrical component selection device for electrical equipment is provided, including the equivalent modeling device. The electrical component selection device further includes an electrical component evaluation module, configured to: obtain a preset operating temperature range of the electrical component in the electrical equipment; determine the simulated operating temperature of the electrical component under a reference operating condition based on the thermoelectric coupling simulation equivalent model of the electrical equipment; and determine that the electrical component in the electrical equipment is a suitable electrical component if the simulated operating temperature of the electrical component under the reference operating condition is within the preset operating temperature range of the electrical component.

[0016] In one possible implementation, the electrical component selection device further includes a model update module, configured to: replace any electrical component whose simulated operating temperature exceeds a preset operating temperature range under reference conditions in the thermoelectric coupling simulation equivalent model; determine the equivalent parameters of the replaced electrical component based on its electrical component parameters; and update the thermoelectric coupling simulation equivalent model of the electrical equipment using the equivalent parameters of the replaced electrical component until the simulated operating temperature of the electrical component under reference conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical component.

[0017] According to another aspect of this disclosure, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the above-described equivalent modeling method or the above-described electrical component selection method when executing the instructions stored in the memory.

[0018] According to another aspect of this disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, wherein the computer program instructions, when executed by a processor, implement the above-described equivalent modeling method or the above-described electrical component selection method.

[0019] According to another aspect of this disclosure, a computer program product is 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 a processor of an electronic device, the processor in the electronic device performs the above-described equivalent modeling method or the above-described electrical component selection method.

[0020] According to various aspects of this disclosure, by adopting a simple three-dimensional isosectional configuration and a three-dimensional joint configuration of the electrical component's connector to equivalently replace the electrical component, a simplified model of the electrical component can be obtained. Then, based on the simplified electrical component model and the electrical component parameters, the equivalent parameters of the electrical component can be calculated, which can improve the calculation efficiency of the equivalent parameters and achieve simplified modeling of the electrical component's equivalent model, thereby improving the modeling efficiency of the electrical component's equivalent model. Furthermore, the thermoelectric coupling simulation equivalent model of the entire electrical equipment can be constructed using the simplified electrical component's equivalent model. This results in a smaller model size for the thermoelectric coupling simulation equivalent model, reducing the modeling workload and thus improving the modeling efficiency of the entire electrical equipment's thermoelectric coupling simulation equivalent model. Additionally, by self-correcting the equivalent parameters assigned in the electrical component's equivalent model, the model accuracy of the target electrical component's equivalent model obtained after correction can be improved, further contributing to improving the modeling accuracy of the electrical equipment's thermoelectric coupling simulation equivalent model.

[0021] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0023] Figure 1 A flowchart illustrating a thermoelectric coupling simulation equivalent modeling method for electrical equipment according to an embodiment of the present disclosure is shown.

[0024] Figure 2a and Figure 2b Schematic diagrams of two simplified electrical component models according to an embodiment of the present disclosure are shown respectively.

[0025] Figure 3 A schematic diagram illustrating the equivalent modeling of electrical equipment and the selection process of electrical components according to an embodiment of the present disclosure is shown.

[0026] Figure 4 A block diagram of an equivalent modeling apparatus for thermoelectric coupling simulation of an electrical device according to an embodiment of the present disclosure is shown.

[0027] Figure 5 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown.

[0028] Figure Labels

[0029] 21, 24, and 26 represent the three-dimensional joint configurations of different connectors, while 22, 23, and 25 represent the three-dimensional equal cross-sectional configurations of different electrical components. Detailed Implementation

[0030] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0031] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0032] In this document, 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 three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0033] It should be understood that the terms "first," "second," etc., in the claims, specification, and drawings of this disclosure are used to distinguish different objects, rather than to describe a specific order. The terms "comprising" and "including" as used in the specification and claims of this disclosure indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0034] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0035] In practical applications, the thermoelectric coupling simulation equivalent modeling method for electrical equipment in this disclosure can be deployed on various terminal devices through software or hardware modifications. The terminal devices involved in this disclosure can refer to devices with wireless and / or wired connection functions. Wireless connection means that they can connect to other devices via Wi-Fi, Bluetooth, or other wireless connection methods. The terminal devices involved in this disclosure can also communicate with other devices via wired connection functions. The terminal devices involved in this disclosure can be touchscreen, non-touchscreen, or screenless. Touchscreen devices can be controlled by clicking or swiping on the display screen using fingers or styluses. Non-touchscreen devices can connect to input devices such as mice, keyboards, and touch panels to control the terminal device. Screenless devices can be, for example, screenless Bluetooth speakers. For example, the terminal devices in this application can include, but are not limited to, user equipment (UE), mobile devices, user terminals, terminals, handheld devices, tablet computers, laptops, PDAs, and computing devices.

[0036] The thermo-electric coupling simulation equivalent modeling method for electrical equipment in this disclosure can also be deployed on a server. This server can be located in the cloud or locally, and can be a physical device or a virtual device, such as a virtual machine or container. It has wireless communication capabilities, which can be configured in the server's chip (system) or other components. It can refer to a device with wireless connectivity, meaning it can connect to other servers or terminal devices via Wi-Fi, Bluetooth, or other wireless connection methods. The server involved in this disclosure can also have wired communication capabilities. For example, the server can receive the planar geometric design drawing of the electrical equipment and the electrical component parameters of the electrical components in the electrical equipment sent by the terminal device. The server then executes the thermo-electric coupling simulation equivalent modeling method of this disclosure based on the planar geometric design drawing and the electrical component parameters to generate a thermo-electric coupling simulation equivalent model of the electrical equipment and return it to the terminal device, so that the modeling results of the electrical equipment can be displayed to the user on the terminal device.

[0037] Figure 1 A flowchart illustrating a thermo-electric coupling simulation equivalent modeling method for an electrical device according to an embodiment of this disclosure is provided. The electrical device includes multiple electrical components. It should be understood that those skilled in the art can design various electrical devices according to actual needs. This disclosure does not limit the type, quantity, layout structure, or connection relationship of the electrical components in the electrical device. Figure 1 As shown, the thermoelectric coupling simulation equivalent modeling method includes steps S11 to S14.

[0038] In step S11, the electrical component parameters of the electrical components in the electrical equipment are obtained.

[0039] The electrical component parameters include: the overall reference mass and overall reference resistance of the electrical component under reference operating conditions, the connection mass and specific heat capacity of the connection, the reference current, operating time, and reference temperature rise of the electrical component. The electrical equipment can be a battery pack or any other electrical device.

[0040] In practical applications, known experimental measurement techniques in the art can be used to measure the electrical component parameters of various electrical components in electrical equipment. For example, a resistance meter can be used to obtain the reference resistance of the electrical component, a temperature sensor can be used to measure the reference temperature rise of the electrical component under reference operating conditions, and a current meter can be used to obtain the reference current of the electrical component under reference operating conditions. Since the material of the joints of each electrical component is known, the joint mass and specific heat capacity of the electrical component can be obtained by measuring the mass and volume of the electrical component joints. The operating time of the electrical component under reference operating conditions can be customized according to the actual situation. It should be understood that the embodiments of this disclosure do not limit the methods for obtaining the above-mentioned electrical component parameters.

[0041] The reference operating condition (which can also be understood as the demand operating condition) can be the operating condition of the electrical equipment when it is working, which can be customized by those skilled in the art according to actual needs. This disclosure does not limit this.

[0042] In step S12, a three-dimensional constant cross-section configuration for replacing the electrical component and a three-dimensional joint configuration for the electrical component's connector are determined. The electrical component is then replaced by the three-dimensional constant cross-section configuration and the three-dimensional joint configuration of the electrical component to obtain a simplified electrical component model.

[0043] In practical applications, the planar geometric design drawing of the user equipment can be obtained, and based on the shape information of the electrical components and the shape information of the connectors of the electrical components indicated in the planar geometric design drawing of the user equipment, the three-dimensional equal cross-sectional configuration for replacing the electrical components and the three-dimensional connector configuration of the connectors of the electrical components can be determined.

[0044] The planar geometric design drawings of the user equipment may include, for example, CAD design drawings of the user equipment. It should be understood that the planar geometric design drawings may include information such as the outline, size, and connection relationships of various electrical components in the user equipment. The planar combined design drawings of the user equipment may be provided by the development and design personnel of the user equipment. This disclosure does not limit the method of obtaining the planar geometric design drawings of the electrical equipment.

[0045] Shape information can include details such as outline and dimensions. A three-dimensional constant cross-section configuration can be understood as a solid structure with the same cross-section; for example, it could be a solid structure with a square, circle, or other uniform cross-sections. The connector of an electrical component is the connection between the electrical component and other components.

[0046] It should be understood that after knowing the shape information of each electrical component and the shape information of each electrical component's connector using the planar geometric design drawing, three-dimensional modeling techniques known in the art can be used to construct a three-dimensional isosectional configuration to replace the electrical component and a three-dimensional connector configuration to replace the electrical component based on the shape information of any electrical component and the shape information of any electrical component's connector. This disclosure does not limit the scope of the embodiments.

[0047] In this method, the three-dimensional constant cross-section configuration and the three-dimensional joint configuration of the electrical component are used to replace the electrical component. This is equivalent to using the simple three-dimensional constant cross-section configuration and the three-dimensional joint configuration to approximately represent the actual complex structure of the electrical component. This simplifies the modeling of electrical components in electrical equipment and improves the efficiency of thermo-electric coupling simulation modeling for the entire electrical equipment.

[0048] Figure 2a and Figure 2b Schematic diagrams of two simplified models of electrical components are shown respectively, such as Figure 2aAs shown, a cylinder with a uniform cross-section is used to replace an electrical component, such as... Figure 2b As shown, a cube with a uniform cross-section and a U-shaped body are used to replace two electrical components, respectively. This simplifies the electrical component model, making it easier to efficiently calculate the equivalent parameters of the component and thus improving modeling efficiency. Figure 2a 21 represents a three-dimensional joint configuration formed by replacing the joint with a simple cube / plate connection, and 22 represents a three-dimensional constant cross-section configuration of an electrical component formed by replacing the joint with a simple cylinder; Figure 2b 23 represents a three-dimensional constant cross-sectional configuration of an electrical component formed by replacing the internal components of the connector with a simple cube; 24 represents a three-dimensional connector configuration formed by replacing the external components of the connector with a simple cube / plate; 25 represents a three-dimensional constant cross-sectional configuration of an electrical component formed by replacing the internal components with a U-shaped body; and 26 represents a three-dimensional connector configuration formed by replacing the internal components with a hollow cylinder.

[0049] In step S13, the equivalent parameters of the electrical component are determined based on the electrical component parameters and the simplified electrical component model of the electrical component, and the equivalent parameters of the electrical component are assigned to the simplified electrical component model of the electrical component to obtain the equivalent electrical component model of the electrical component.

[0050] The equivalent parameters include at least one of the following: equivalent specific heat capacity, equivalent density, equivalent resistivity, equivalent thermal conductivity, and equivalent convective heat transfer coefficient. The simplified model of the electrical component includes the dimensional information of its three-dimensional isosectional configuration. Therefore, determining the equivalent parameters of the electrical component based on its parameters and simplified model can include:

[0051] For any electrical component, the equivalent specific heat capacity of the electrical component is determined based on the overall reference mass and reference resistance of the electrical component, the joint mass and specific heat capacity of the joint of the electrical component, as well as the reference current, operating time and reference temperature rise of the electrical component.

[0052] The equivalent density of the electrical component is determined based on the reference mass of the electrical component, the joint mass of the electrical component, and the dimensional information of the three-dimensional constant cross-sectional configuration of the electrical component.

[0053] The equivalent resistivity of the electrical component is determined based on its reference resistance and the dimensional information of its three-dimensional constant cross-sectional configuration.

[0054] The dimensional information of the three-dimensional uniform cross-section configuration includes the cross-sectional area and length of the three-dimensional uniform cross-section configuration; optionally, the equivalent specific heat capacity of the electrical component can be calculated using formula (1), the equivalent density of the electrical component can be calculated using formula (2), and the equivalent resistivity of the electrical component can be calculated using formula (3).

[0055]

[0056]

[0057] ρ j =R rj S j / L j (3)

[0058] Where j represents the j-th electrical component, j∈[1,n], and n is the total number of electrical components in the electrical equipment. rj R represents the reference current of the j-th electrical component. rj t represents the reference resistance of the j-th electrical component. rj C represents the operating time of the j-th electrical component under reference operating conditions. pj M represents the equivalent specific heat capacity of the j-th electrical component. j M represents the reference mass of the j-th electrical component. cj ΔT represents the joint quality of the j-th electrical component. rj C represents the reference temperature rise under the reference operating condition of the j-th electrical component. pcj The specific heat capacity of the connector representing the j-th electrical component. ρ represents the equivalent density of the j-th electrical component. j S represents the equivalent resistivity of the j-th electrical component. j L represents the cross-sectional area of ​​the three-dimensional constant cross-section configuration of the j-th electrical component. j The length of the three-dimensional constant cross-section configuration of the j-th electrical component.

[0059] In practical applications, the equivalent thermal conductivity of electrical components can be the thermal conductivity of the main material of the component; alternatively, the equivalent convective heat transfer coefficient can be customized based on practical experience, the material of the component, and the outer surface area of ​​the simplified model of the component. For example, the equivalent convective heat transfer coefficient can be set to 2 W / (m²). 2 K). Among them, the custom-set equivalent convection heat transfer coefficient may not be accurate enough, so the equivalent heat transfer coefficient can be corrected later to improve the modeling accuracy of the equivalent model of electrical components.

[0060] In step S14, an equivalent simulation model of the thermo-electric coupling of the electrical equipment is established based on the equivalent model of the electrical components.

[0061] It should be understood that through the above steps S12 to S13, equivalent electrical component models of each electrical component in the electrical equipment can be obtained. Then, based on the connection relationships between these components, the equivalent electrical component models can be connected and combined to obtain the thermo-electric coupling simulation equivalent model of the entire electrical equipment. As mentioned above, the equivalent electrical component models already contain the equivalent parameters of the electrical components; that is, the thermo-electric coupling simulation equivalent model of the electrical equipment includes information such as the equivalent parameters of each electrical component.

[0062] According to the method of this disclosure, by adopting a simple three-dimensional equal cross-section configuration and a three-dimensional joint configuration of the electrical component's connector to equivalently replace the electrical component, a simplified model of the electrical component can be obtained. Then, based on the simplified model of the electrical component and the parameters of the electrical component, the equivalent parameters of the electrical component can be calculated, which can improve the calculation efficiency of the equivalent parameters and realize the simplified modeling of the electrical component equivalent model, thereby improving the modeling efficiency of the electrical component equivalent model. Then, the simplified electrical component equivalent model is used to construct the thermoelectric coupling simulation equivalent model of the entire electrical equipment. This makes the model size of the thermoelectric coupling simulation equivalent model smaller, reduces the modeling workload, and thus improves the modeling efficiency of the thermoelectric coupling simulation equivalent model of the entire electrical equipment.

[0063] Considering that the equivalent parameters calculated using the aforementioned electrical component parameters may not be accurate enough—for example, the selected equivalent convective heat transfer coefficient may not be accurate enough, or the calculated equivalent resistivity may not be accurate enough—resulting in an inaccurate thermoelectric coupling simulation equivalent model, to further improve the accuracy of the thermoelectric coupling simulation equivalent model, in one possible implementation, step S14 above, establishing a thermoelectric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical components, may include:

[0064] Step S141: Perform thermo-electric coupling simulation calculation based on the equivalent model of the electrical component to obtain the thermo-electric coupling simulation calculation results of the equivalent model of the electrical component. The thermo-electric coupling simulation calculation results include: the maximum voltage, minimum voltage and average temperature rise of the equivalent model of the electrical component.

[0065] Step S142: Based on the thermoelectric coupling simulation results of the electrical component equivalent model, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, the equivalent parameters assigned in the electrical component equivalent model of the electrical component are corrected to obtain the target electrical component equivalent model of the electrical component.

[0066] Step S143: Based on the equivalent model of the target electrical component, establish the thermo-electric coupling simulation equivalent model of the electrical equipment.

[0067] In practical applications, those skilled in the art can use any known thermoelectric coupling simulation software to perform thermoelectric coupling simulation calculations on the equivalent model of the electrical component under reference operating conditions, thereby obtaining the maximum voltage, minimum voltage, and average temperature rise of the equivalent model. This disclosure does not limit the specific process of the thermoelectric coupling simulation calculation in step S141 above. The average temperature rise of the equivalent model can be understood as the average temperature rise generated by the equivalent model during its operation under reference operating conditions; the maximum and minimum voltages of the equivalent model can be understood as the maximum and minimum voltages generated by the equivalent model during its operation under reference operating conditions.

[0068] As mentioned above, the equivalent parameters include the equivalent resistivity, and the resistivity of the electrical component affects its voltage. Therefore, the equivalent resistivity can be corrected to improve the modeling accuracy of the equivalent model of the electrical component. In one possible implementation, step S142 above, based on the thermoelectric coupling simulation calculation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, corrects the equivalent parameters assigned to the equivalent model of the electrical component to obtain the target equivalent model of the electrical component, which may include:

[0069] Step S1421: For any electrical component's equivalent model, determine the simulation voltage of the equivalent model based on the maximum and minimum voltages of the equivalent model, and determine the simulation resistance of the equivalent model based on the simulation voltage and the reference current of the electrical component.

[0070] Step S1422: If the deviation between the simulated resistor and the reference resistor of the electrical component exceeds the first specified range, the equivalent resistivity of the electrical component is recalculated based on the dimensional information of the three-dimensional equal cross-sectional configuration of the simulated resistor and the electrical component.

[0071] Step S1423: Based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the equivalent model of the electrical component is corrected until the deviation between the simulated resistance of the equivalent model of the electrical component and the reference resistance of the electrical component is within a first specified range, thereby obtaining the target equivalent model of the electrical component.

[0072] Among them, the simulation voltage V of the equivalent model of the j-th electrical component is... j The maximum voltage V can be the equivalent model of the j-th electrical component. max,j With minimum voltage V min,j The difference between them, i.e., V j =V max,j -V min,j The simulation resistance R of the equivalent model of the j-th electrical componentsimu,j The simulation voltage V of the equivalent model of the j-th electrical component. j The reference current I of the j-th electrical component rj The ratio between them, i.e., R simu,j =V j / I rj .

[0073] In practical applications, those skilled in the art can customize the specific values ​​of the first specified range according to the actual situation, and this disclosure does not limit such values. If the deviation between the simulated resistance of the equivalent model of an electrical component and the reference resistance of the electrical component exceeds the first specified range, it can be considered that the error of the equivalent resistivity assigned in the equivalent model of the electrical component is large. Therefore, the equivalent resistivity of the electrical component can be recalculated based on the simulated resistance of the electrical component and the size information of the three-dimensional equal cross-section configuration of the electrical component, according to the above formula (3). That is, the simulated resistance of the electrical component and the size information of the three-dimensional equal cross-section configuration of the electrical component can be substituted into the above formula (3) to obtain a new equivalent resistivity. Based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the equivalent model of the electrical component is corrected. That is, the equivalent resistivity assigned in the equivalent model of the electrical component is corrected to the recalculated equivalent resistivity. Then, the above steps S141 and S1421 to S1423 are re-executed using the corrected equivalent model of the electrical component until the deviation between the simulated resistance of the equivalent model of the electrical component and the reference resistance of the electrical component is within the first specified range, thereby completely correcting the equivalent resistivity.

[0074] As mentioned above, the equivalent parameters include the equivalent convective heat transfer coefficient, and the equivalent convective heat transfer coefficient of the electrical component is negatively correlated with the temperature rise of the electrical component. Therefore, the equivalent convective heat transfer coefficient can be corrected to improve the modeling accuracy of the equivalent model of the electrical component. In one possible implementation, step S142 above, based on the thermoelectric coupling simulation calculation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, corrects the equivalent parameters assigned in the equivalent model of the electrical component to obtain the target equivalent model of the electrical component, which may include:

[0075] Step S1424: For any electrical component's equivalent model, if the deviation between the average temperature rise of the equivalent model and the reference temperature rise of the electrical component exceeds a second specified range, and the average temperature rise of the equivalent model is greater than the reference temperature rise of the electrical component, increase the equivalent convective heat transfer coefficient assigned to the equivalent model until the deviation between the average temperature rise of the equivalent model and the reference temperature rise of the electrical component is within the second specified range, thus obtaining the target equivalent model of the electrical component; or...

[0076] Step S1425: If the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds the second specified range, and the average temperature rise of the equivalent model of the electrical component is less than the reference temperature rise of the electrical component, the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component is reduced until the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within the second specified range, thereby obtaining the target equivalent model of the electrical component.

[0077] Those skilled in the art can customize the specific values ​​of the second specified range according to actual circumstances, and this embodiment of the present disclosure does not impose any limitations on this. If the deviation between the average temperature rise of the equivalent model of an electrical component and the reference temperature rise of the electrical component exceeds the second specified range, it can be considered that the error of the equivalent convective heat transfer coefficient assigned in the equivalent model of the electrical component is large. Therefore, the equivalent convective heat transfer coefficient can be corrected based on the relationship between the average temperature rise and the reference temperature rise. That is, if the average temperature rise ΔT of the equivalent model of the j-th electrical component exceeds the second specified range, the error of the equivalent convective heat transfer coefficient can be considered to be large. simu,j The reference temperature rise ΔT of the j-th electrical component is greater than rj This allows us to increase the equivalent convective heat transfer coefficient corresponding to the j-th electrical component, thereby reducing the average temperature rise of the equivalent model. If ΔT simu,j Less than ΔT rj This allows us to reduce the equivalent convective heat transfer coefficient corresponding to the j-th electrical component, thereby increasing the average temperature rise of the equivalent model until ΔT... simu,j With ΔT rj The deviation between them is within the second specified range, thus completing the correction of the equivalent convective heat transfer coefficient.

[0078] In practical applications, the equivalent resistivity can be corrected only through the above steps S1421 to S1423, or the equivalent convective heat transfer coefficient can be corrected only through the above steps S1424 or S1425, or both the equivalent resistivity and the equivalent convective heat transfer coefficient can be corrected simultaneously to obtain the equivalent model of the target electrical component. This disclosure does not limit this.

[0079] In practical applications, after obtaining the equivalent parameters of each electrical component (including the corrected equivalent resistivity and equivalent convective heat transfer coefficient), these parameters can be saved. This allows for future thermoelectric coupling simulation equivalent modeling projects for other electrical equipment. If the same or similar electrical components are used in other electrical equipment, the pre-saved equivalent parameters of those components can be directly used to perform thermoelectric coupling simulation equivalent modeling for those other electrical equipment. This improves the modeling accuracy and efficiency of the thermoelectric coupling simulation equivalent model for other electrical equipment and also enables the evaluation and prediction of the heat generation of electrical components in other electrical equipment.

[0080] According to embodiments of this disclosure, by self-correcting the equivalent parameters assigned in the equivalent model of electrical components, the model accuracy of the target electrical component equivalent model obtained after correction can be improved, which in turn helps to improve the modeling accuracy of the thermoelectric coupling simulation equivalent model of electrical equipment.

[0081] In practical applications, after obtaining the thermoelectric coupling simulation equivalent model of the electrical equipment (including the thermoelectric coupling simulation equivalent model constructed using the target electrical component equivalent models of each electrical component), the thermoelectric coupling simulation equivalent model can be used to evaluate whether the electrical components in the electrical equipment are suitable. That is, it can be used to evaluate whether the operating temperature of the electrical components in the electrical equipment is within the preset operating temperature range that is comfortable for the electrical components under reference operating conditions, or in other words, to evaluate whether the heat generation of the electrical components is normal. This preset operating temperature range can be understood as the temperature range suitable for the operation of the electrical components. The preset operating temperature range may differ for different electrical components, depending on the performance and quality of the electrical components themselves. This disclosure does not limit this. Therefore, this disclosure also provides a method for selecting electrical components for electrical equipment, including the above-mentioned thermoelectric coupling simulation equivalent modeling method. The electrical component selection method further includes:

[0082] Obtain the preset operating temperature range of electrical components in electrical equipment;

[0083] Based on the thermo-electric coupling simulation equivalent model of electrical equipment, the simulation operating temperature of electrical components under reference operating conditions is determined.

[0084] If the simulated operating temperature of the electrical component under reference operating conditions is within the preset operating temperature range of the electrical component, it is determined that the electrical component in the electrical equipment is a suitable electrical component.

[0085] In practical applications, the specific values ​​of the preset operating temperature range of electrical components can be customized according to actual conditions. This embodiment does not impose limitations on this. For example, the preset operating temperature range of the j-th electrical component can be expressed as (T... min,j T max,jFurthermore, those skilled in the art can use any known thermoelectric coupling simulation software in the art to calculate the simulated operating temperature of electrical components in the thermoelectric coupling simulation equivalent model of electrical equipment under reference operating conditions, that is, to analyze the heat generation of electrical components under reference operating conditions in the thermoelectric coupling simulation equivalent model; wherein, the simulated operating temperature of electrical components under reference operating conditions can be understood as the temperature generated by the equivalent model of electrical components or the target equivalent model of electrical components during the working time of the reference operating conditions.

[0086] If the simulated operating temperature of the electrical components in the electrical equipment under the reference operating condition is within the preset operating temperature range of the electrical components, that is, the simulated operating temperature T of the j-th electrical component... j Satisfy T min,j <T j <T max,j If the j-th electrical component in the electrical equipment is considered to be a suitable electrical component, then the modeling and calculation of the entire thermoelectric coupling simulation equivalent model is completed.

[0087] If the operating temperature of an electrical component exceeds its preset operating temperature range, the component is considered unsuitable. In this case, a better-performing or wider-range electrical component can be selected to replace the unsuitable one. The equivalent parameters of the replaced component are then recalculated to replace the equivalent parameters assigned to the unsuitable component in the thermoelectric coupling simulation equivalent model, until the simulated operating temperature of the electrical component under reference conditions falls within its preset operating temperature range. In other words, the electrical component selection method also includes:

[0088] In the equivalent model of thermoelectric coupling simulation, if any electrical component has a simulated operating temperature that exceeds the preset operating temperature range under the reference operating condition, the electrical component with the simulated operating temperature exceeding the preset operating temperature range is replaced, and the equivalent parameters of the replaced electrical component are determined based on the electrical component parameters of the replaced electrical component.

[0089] Using the equivalent parameters of the replaced electrical components, update the thermoelectric coupling simulation equivalent model of the electrical equipment until the simulation operating temperature of the electrical components under the reference operating conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical components.

[0090] When the simulated operating temperature exceeds the preset operating temperature range, a better-performing electrical component or an electrical component with a wider preset operating temperature range can be selected to replace the electrical component whose simulated operating temperature exceeds the preset operating temperature range. The equivalent parameter calculation method provided in step S13 above can be used to determine the equivalent parameters of the replaced electrical component based on its parameters; this will not be elaborated upon here.

[0091] In practical applications, if the three-dimensional constant cross-sectional configuration of the replaced electrical component is the same as that of the original electrical component, the equivalent parameters of the replaced electrical component can be directly used to replace the original equivalent parameters of the electrical component in the thermoelectric coupling simulation equivalent model of the electrical equipment. If the three-dimensional constant cross-sectional configuration of the replaced electrical component is different from that of the original electrical component, the equivalent model of the replaced electrical component can be re-determined by referring to step S13 above and using the equivalent parameters of the replaced electrical component. Alternatively, the target equivalent model of the replaced electrical component can be further determined by referring to steps S141 to S142 above. Then, the original equivalent model of the electrical component in the thermoelectric coupling simulation equivalent model can be replaced by the re-determined equivalent model or the target equivalent model of the electrical component, so as to update the thermoelectric coupling simulation equivalent model of the electrical equipment.

[0092] According to the electrical component selection method of this disclosure, the thermo-electric coupling simulation equivalent model obtained after simplifying the modeling of the electrical equipment can be used to evaluate whether the electrical components in the electrical equipment are suitable. That is, to evaluate whether the operating temperature of the electrical components in the electrical equipment under reference operating conditions is within the preset operating temperature range of the electrical components, so as to replace unsuitable electrical components in the electrical equipment, realize the selection of electrical components, and thus help improve the performance quality of the entire electrical equipment.

[0093] By utilizing the thermoelectric coupling simulation equivalent modeling method and electrical component selection method of the present disclosure embodiments, it is possible to evaluate whether the operating temperature of an electrical component under any reference operating condition is within the preset operating temperature range of the electrical component; and it is possible to achieve thermoelectric coupling simulation equivalent modeling for the entire electrical system of the electrical equipment, without the need for very detailed electrical component parameters to establish a complex equivalent model of the electrical component, and without the need to calculate the equivalent parameters of the electrical component or connection bar separately for each operating condition, thereby improving the overall thermoelectric coupling modeling efficiency of the electrical equipment.

[0094] Based on the thermo-electric coupling simulation equivalent modeling method for electrical equipment and the electrical component selection method provided in the above embodiments of this disclosure, this disclosure also provides Figure 3 The equivalent modeling and electrical component selection process shown is as follows: Figure 3 As shown, the equivalent modeling and electrical component selection process includes:

[0095] Step S31: Obtain the CAD design drawing of the electrical equipment, the electrical component parameters of the electrical components in the electrical equipment, and the reference working conditions used in the thermoelectric coupling simulation;

[0096] Step S32: Using the three-dimensional constant cross-section configuration of the electrical component and the three-dimensional joint configuration of the electrical component to equivalently represent the electrical component, a simplified model of the electrical component is obtained;

[0097] Step S33: Based on the electrical component parameters and the dimensional information of the three-dimensional constant cross-sectional configuration of the electrical component, determine the equivalent specific heat capacity, equivalent density, and equivalent resistivity of the electrical component.

[0098] Step S34: Establish the equivalent model of the electrical components and select the equivalent resistivity and equivalent convective heat transfer coefficient of the electrical components.

[0099] Step S35: Perform thermo-electric coupling simulation calculations based on the equivalent model of the electrical components, and determine the simulation resistance and average temperature rise of the equivalent model of the electrical components based on the results of the thermo-electric coupling simulation calculations.

[0100] Step S36: Determine whether the simulated resistance and average temperature rise are within the allowable error range, that is, determine whether the deviation between the simulated resistance and the reference resistance is within the first specified range, and whether the deviation between the average temperature rise and the reference temperature rise is within the second specified range; if the simulated resistance and average temperature rise are not within the allowable error range, return to step S34 and reselect the equivalent resistivity and equivalent convective heat transfer coefficient of the electrical components.

[0101] Step S37: If the simulated resistance and average temperature rise are within the allowable error range, then based on the equivalent model of the electrical component, establish a thermoelectric coupling simulation equivalent model of the electrical equipment, and use the thermoelectric coupling simulation equivalent model to calculate the simulated operating temperature of the electrical component under the reference operating condition.

[0102] Step S38: Determine whether the simulated operating temperature of the electrical component is within the preset operating temperature range of the electrical component; if the simulated operating temperature of an electrical component exceeds the preset operating temperature range of the electrical component, return to step S31 and re-determine the parameters of the electrical component.

[0103] Step S39: If the simulated operating temperature of the electrical component is within the preset operating temperature range of the electrical component, then the electrical component is a suitable electrical component; if the simulated operating temperature of each electrical component in the electrical equipment is within the preset operating temperature range of the electrical component, then the modeling is completed.

[0104] It should be understood that the specific implementation methods of each step in the equivalent modeling and electrical component selection process of the embodiments of this disclosure can be referred to the relevant descriptions in the thermoelectric coupling simulation equivalent modeling method and electrical component selection method provided in the embodiments of this disclosure above, and will not be repeated here.

[0105] The equivalent modeling and electrical component selection process according to the embodiments of this disclosure can improve the modeling efficiency and accuracy of the thermo-electric coupling simulation equivalent model of the entire electrical equipment, and enable the selection of suitable electrical components for the electrical equipment.

[0106] Figure 4 This diagram shows a block diagram of a thermoelectric coupling simulation equivalent modeling apparatus for an electrical device according to an embodiment of the present disclosure. The electrical device includes a plurality of electrical components, and the apparatus includes:

[0107] The acquisition module 401 is used to acquire the electrical component parameters of the electrical components in the electrical equipment;

[0108] Equivalent module 402 is used to determine the three-dimensional constant cross-section configuration for replacing the electrical component and the three-dimensional joint configuration of the electrical component, and to use the three-dimensional constant cross-section configuration of each electrical component and the three-dimensional joint configuration of the electrical component to equivalence the electrical component, thereby obtaining a simplified electrical component model of the electrical component;

[0109] The electrical component modeling module 403 is used to determine the equivalent parameters of the electrical component based on the electrical component parameters and the simplified electrical component model of the electrical component, and to assign the equivalent parameters of the electrical component to the simplified electrical component model of the electrical component to obtain the equivalent electrical component model of the electrical component.

[0110] The electrical equipment modeling module 404 is used to establish a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical component.

[0111] In one possible implementation, the electrical component parameters include: the overall reference mass and overall reference resistance of the electrical component under reference operating conditions, the joint mass and specific heat capacity of the electrical component, the reference current, operating time, and reference temperature rise of the electrical component; the equivalent parameters include at least one of the following: equivalent specific heat capacity, equivalent density, equivalent resistivity, equivalent thermal conductivity, and equivalent convective heat transfer coefficient; the electrical equipment is a battery pack.

[0112] In one possible implementation, establishing a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical component includes: performing thermo-electric coupling simulation calculations based on the equivalent model of the electrical component to obtain the thermo-electric coupling simulation calculation results of the equivalent model of the electrical component, wherein the thermo-electric coupling simulation calculation results include: the maximum voltage, minimum voltage, and average temperature rise of the equivalent model of the electrical component; correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermo-electric coupling simulation calculation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component to obtain a target equivalent model of the electrical component; and establishing a thermo-electric coupling simulation equivalent model of the electrical equipment based on the target equivalent model of the electrical component.

[0113] In one possible implementation, the step of correcting the equivalent parameters assigned to the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: for any equivalent model of the electrical component, determining the simulation voltage of the equivalent model of the electrical component based on the maximum and minimum voltages of the equivalent model of the electrical component, and determining the electrical component's reference current based on the simulation voltage and the reference current of the electrical component. The simulation resistance of the electrical component equivalent model of the gas component; if the deviation between the simulation resistance and the reference resistance of the electrical component exceeds a first specified range, the equivalent resistivity of the electrical component is recalculated based on the size information of the simulation resistance and the three-dimensional equal cross-sectional configuration of the electrical component; based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the electrical component equivalent model of the electrical component is corrected until the deviation between the simulation resistance of the electrical component equivalent model of the electrical component and the reference resistance of the electrical component is within the first specified range, thus obtaining the target electrical component equivalent model of the electrical component.

[0114] In one possible implementation, the step of correcting the equivalent parameters assigned to the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: for any equivalent model of the electrical component, if the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds a second specified range, and the average temperature rise of the equivalent model of the electrical component is greater than the reference temperature rise of the electrical component, increasing the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component until the target temperature rise is reached. If the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within a second specified range, a target equivalent model of the electrical component is obtained; or, if the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds the second specified range, and the average temperature rise of the equivalent model of the electrical component is less than the reference temperature rise of the electrical component, the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component is reduced until the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within the second specified range, a target equivalent model of the electrical component is obtained.

[0115] In one possible implementation, determining the equivalent parameters of the electrical component based on its electrical component parameters and a simplified model includes: for any electrical component, determining the equivalent specific heat capacity of the electrical component based on its overall reference mass and reference resistance, its connector mass and specific heat capacity, and its reference current, operating time, and reference temperature rise; determining the equivalent density of the electrical component based on its reference mass, connector mass, and dimensional information of its three-dimensional isotropic cross-section configuration; and determining the equivalent resistivity of the electrical component based on its reference resistance and dimensional information of its three-dimensional isotropic cross-section configuration.

[0116] According to the thermoelectric coupling simulation equivalent modeling device of this disclosure, by adopting a simple three-dimensional equal cross-section configuration and a three-dimensional joint configuration of the electrical component's joint to equivalently replace the electrical component, a simplified model of the electrical component can be obtained. Then, based on the simplified model of the electrical component and the electrical component parameters, the equivalent parameters of the electrical component can be calculated, which can improve the calculation efficiency of the equivalent parameters and realize the simplified modeling of the electrical component equivalent model, thereby improving the modeling efficiency of the electrical component equivalent model. Then, the thermoelectric coupling simulation equivalent model of the entire electrical equipment is constructed using the simplified electrical component equivalent model. This makes the model size of the thermoelectric coupling simulation equivalent model smaller, reduces the modeling workload, and thus improves the modeling efficiency of the thermoelectric coupling simulation equivalent model of the entire electrical equipment.

[0117] Based on the above-mentioned thermoelectric coupling simulation equivalent modeling device, this disclosure embodiment also provides an electrical component selection device for electrical equipment, including the aforementioned thermoelectric coupling simulation equivalent modeling device, and the electrical component selection device further includes:

[0118] An electrical component evaluation module is used to: obtain the preset operating temperature range of the electrical component in the electrical equipment; determine the simulated operating temperature of the electrical component under a reference operating condition based on the thermoelectric coupling simulation equivalent model of the electrical equipment; and determine that the electrical component in the electrical equipment is a suitable electrical component if the simulated operating temperature of the electrical component under the reference operating condition is within the preset operating temperature range of the electrical component.

[0119] In one possible implementation, the electrical component selection device further includes a model update module, configured to: replace any electrical component whose simulated operating temperature exceeds a preset operating temperature range under reference conditions in the thermoelectric coupling simulation equivalent model; determine the equivalent parameters of the replaced electrical component based on its electrical component parameters; and update the thermoelectric coupling simulation equivalent model of the electrical equipment using the equivalent parameters of the replaced electrical component until the simulated operating temperature of the electrical component under reference conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical component.

[0120] According to the electrical component selection device of this disclosure, the thermoelectric coupling simulation equivalent model obtained after simplifying the modeling of the electrical equipment can be used to evaluate whether the electrical components in the electrical equipment are suitable. That is, to evaluate whether the operating temperature of the electrical components in the electrical equipment under reference operating conditions is within the preset operating temperature range of the electrical components, so as to replace unsuitable electrical components in the electrical equipment, realize the selection of electrical components, and thus help improve the performance quality of the entire electrical equipment.

[0121] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0122] This disclosure also proposes a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the aforementioned equivalent modeling method or the aforementioned electrical component selection method. The computer-readable storage medium can be volatile or non-volatile.

[0123] This disclosure also proposes an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the above-described equivalent modeling method or the above-described electrical component selection method when executing the instructions stored in the memory.

[0124] This disclosure also provides a computer program product, including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code. When the computer-readable code is run in a processor of an electronic device, the processor in the electronic device executes the above-described equivalent modeling method or the above-described electrical component selection method.

[0125] Figure 5 A block diagram of an electronic device 1900 according to an embodiment of the present disclosure is shown. For example, the electronic device 1900 may be provided as a server or a terminal device. (Refer to...) Figure 5 The electronic device 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions executable by the processing component 1922, such as application programs. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the aforementioned equivalent modeling method or the aforementioned electrical component selection method.

[0126] Electronic device 1900 may also include a power supply component 1926 configured to perform power management of electronic device 1900, a wired or wireless network interface 1950 configured to connect electronic device 1900 to a network, and an input / output (I / O) interface 1958. Electronic device 1900 can operate on an operating system stored in memory 1932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0127] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of an electronic device 1900 to perform the above-described method.

[0128] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0129] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0130] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0131] Computer program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the computer-readable program instructions to implement various aspects of this disclosure.

[0132] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0133] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0134] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0135] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0136] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for thermoelectric coupling simulation equivalent modeling of electrical equipment, characterized in that, The electrical equipment includes multiple electrical components, and the equivalent modeling method includes: Obtain the electrical component parameters of the electrical components in the electrical equipment; A three-dimensional constant cross-sectional configuration for replacing the electrical component and a three-dimensional connector configuration for the connector of the electrical component are determined, and the electrical component is equivalently replaced by the three-dimensional constant cross-sectional configuration and the three-dimensional connector configuration of the electrical component to obtain a simplified electrical component model; Based on the electrical component parameters and the simplified electrical component model, the equivalent parameters of the electrical component are determined, and the simplified electrical component model is assigned the equivalent parameters to obtain the equivalent electrical component model. Based on the equivalent model of the electrical components, an equivalent simulation model of the thermo-electric coupling of the electrical equipment is established.

2. The equivalent modeling method according to claim 1, characterized in that, The electrical component parameters include: the overall reference mass and overall reference resistance of the electrical component under reference operating conditions, the joint mass and specific heat capacity of the electrical component, the reference current, operating time and reference temperature rise of the electrical component; The equivalent parameters include at least one of the following: equivalent specific heat capacity, equivalent density, equivalent resistivity, equivalent thermal conductivity, and equivalent convective heat transfer coefficient; The electrical equipment mentioned is a battery pack.

3. The equivalent modeling method according to claim 2, characterized in that, The establishment of a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical components includes: Thermoelectric coupling simulation calculations are performed based on the equivalent model of the electrical component to obtain the thermoelectric coupling simulation calculation results of the equivalent model of the electrical component. The thermoelectric coupling simulation calculation results include: the maximum voltage, minimum voltage, and average temperature rise of the equivalent model of the electrical component. Based on the thermoelectric coupling simulation results of the electrical component's equivalent model, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, the equivalent parameters assigned in the electrical component's equivalent model are corrected to obtain the target electrical component equivalent model of the electrical component. Based on the target electrical component equivalent model of the electrical component, a thermo-electric coupling simulation equivalent model of the electrical equipment is established.

4. The equivalent modeling method according to claim 3, characterized in that, The step of correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: For any electrical component's equivalent model, the simulation voltage of the equivalent model is determined based on the maximum and minimum voltages of the equivalent model, and the simulation resistance of the equivalent model is determined based on the simulation voltage and the reference current of the electrical component. If the deviation between the simulated resistor and the reference resistor of the electrical component exceeds a first specified range, the equivalent resistivity of the electrical component is recalculated based on the dimensional information of the simulated resistor and the three-dimensional equal cross-sectional configuration of the electrical component. Based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the equivalent electrical model of the electrical component is corrected until the deviation between the simulated resistance of the equivalent electrical model of the electrical component and the reference resistance of the electrical component is within the first specified range, thereby obtaining the target equivalent electrical model of the electrical component.

5. The equivalent modeling method according to claim 3, characterized in that, The step of correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: For any electrical component's equivalent model, if the deviation between the average temperature rise of the equivalent model and the reference temperature rise of the electrical component exceeds a second specified range, and the average temperature rise of the equivalent model is greater than the reference temperature rise, the equivalent convective heat transfer coefficient assigned to the equivalent model is increased until the deviation between the average temperature rise of the equivalent model and the reference temperature rise is within the second specified range, thus obtaining the target equivalent model of the electrical component; or, If the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds the second specified range, and the average temperature rise of the equivalent model of the electrical component is less than the reference temperature rise of the electrical component, the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component is reduced until the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within the second specified range, thereby obtaining the target equivalent model of the electrical component.

6. The equivalent modeling method according to claim 2, characterized in that, The step of determining the equivalent parameters of the electrical component based on its electrical component parameters and a simplified electrical component model includes: For any electrical component, the equivalent specific heat capacity of the electrical component is determined based on the overall reference mass and reference resistance of the electrical component, the joint mass and specific heat capacity of the joint of the electrical component, as well as the reference current, operating time and reference temperature rise of the electrical component. The equivalent density of the electrical component is determined based on its reference mass, the joint mass, and the dimensional information of its three-dimensional constant cross-sectional configuration. The equivalent resistivity of the electrical component is determined based on its reference resistance and the dimensional information of its three-dimensional constant cross-sectional configuration.

7. A method for selecting electrical components of electrical equipment, including the equivalent modeling method according to any one of claims 1-6, characterized in that, The method for selecting electrical components also includes: Obtain the preset operating temperature range of the electrical components in the electrical equipment; Based on the thermo-electric coupling simulation equivalent model of the electrical equipment, the simulation operating temperature of the electrical component under reference operating conditions is determined. If the simulated operating temperature of the electrical component under reference operating conditions is within the preset operating temperature range of the electrical component, then the electrical component in the electrical equipment is determined to be a suitable electrical component.

8. The electrical component selection method according to claim 7, characterized in that, The method for selecting electrical components also includes: If any electrical component in the thermoelectric coupling simulation equivalent model has a simulated operating temperature that exceeds the preset operating temperature range under the reference operating condition, the electrical component with the simulated operating temperature exceeding the preset operating temperature range is replaced, and the equivalent parameters of the replaced electrical component are determined based on the electrical component parameters of the replaced electrical component. Using the equivalent parameters of the replaced electrical components, the thermoelectric coupling simulation equivalent model of the electrical equipment is updated until the simulation operating temperature of the electrical components under the reference operating conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical components.

9. A thermoelectric coupling simulation equivalent modeling device for electrical equipment, characterized in that, The electrical equipment includes multiple electrical components, and the equivalent modeling device includes: The acquisition module is used to acquire the electrical component parameters of the electrical components in the electrical equipment; An equivalent module is used to determine a three-dimensional constant cross-sectional configuration for replacing the electrical component and a three-dimensional joint configuration for the connector of the electrical component, and to use the three-dimensional constant cross-sectional configuration and the three-dimensional joint configuration of the electrical component to equivalently replace the electrical component, thereby obtaining a simplified electrical component model of the electrical component; An electrical component modeling module is used to determine the equivalent parameters of the electrical component based on the electrical component parameters and the simplified electrical component model of the electrical component, and to assign the equivalent parameters of the electrical component to the simplified electrical component model of the electrical component to obtain the equivalent electrical component model of the electrical component. The electrical equipment modeling module is used to establish a thermo-electric coupling simulation equivalent model of the electrical equipment based on the equivalent model of the electrical components.

10. The equivalent modeling apparatus according to claim 9, characterized in that, The electrical component parameters include: the overall reference mass and overall reference resistance of the electrical component under reference operating conditions, the joint mass and specific heat capacity of the electrical component, the reference current, operating time and reference temperature rise of the electrical component; The equivalent parameters include at least one of the following: equivalent specific heat capacity, equivalent density, equivalent resistivity, equivalent thermal conductivity, and equivalent convective heat transfer coefficient; The electrical equipment mentioned is a battery pack.

11. The equivalent modeling apparatus according to claim 10, characterized in that, The equivalent model of electrical components, based on electrical components, establishes a thermo-electric coupling simulation equivalent model of the electrical equipment, including: Thermoelectric coupling simulation calculations are performed based on the equivalent model of the electrical component to obtain the thermoelectric coupling simulation calculation results of the equivalent model of the electrical component. The thermoelectric coupling simulation calculation results include: the maximum voltage, minimum voltage, and average temperature rise of the equivalent model of the electrical component. Based on the thermoelectric coupling simulation results of the electrical component's equivalent model, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, the equivalent parameters assigned in the electrical component's equivalent model are corrected to obtain the target electrical component equivalent model of the electrical component. Based on the target electrical component equivalent model of the electrical component, a thermo-electric coupling simulation equivalent model of the electrical equipment is established.

12. The equivalent modeling apparatus according to claim 11, characterized in that, The step of correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: For any electrical component's equivalent model, the simulation voltage of the equivalent model is determined based on the maximum and minimum voltages of the equivalent model, and the simulation resistance of the equivalent model is determined based on the simulation voltage and the reference current of the electrical component. If the deviation between the simulated resistor and the reference resistor of the electrical component exceeds a first specified range, the equivalent resistivity of the electrical component is recalculated based on the dimensional information of the simulated resistor and the three-dimensional equal cross-sectional configuration of the electrical component. Based on the recalculated equivalent resistivity, the equivalent resistivity assigned in the equivalent electrical model of the electrical component is corrected until the deviation between the simulated resistance of the equivalent electrical model of the electrical component and the reference resistance of the electrical component is within the first specified range, thereby obtaining the target equivalent electrical model of the electrical component.

13. The equivalent modeling apparatus according to claim 11, characterized in that, The step of correcting the equivalent parameters assigned in the equivalent model of the electrical component based on the thermoelectric coupling simulation results of the equivalent model of the electrical component, the reference resistance of the electrical component, and / or the reference temperature rise of the electrical component, to obtain the target equivalent model of the electrical component, includes: For any electrical component's equivalent model, if the deviation between the average temperature rise of the equivalent model and the reference temperature rise of the electrical component exceeds a second specified range, and the average temperature rise of the equivalent model is greater than the reference temperature rise, the equivalent convective heat transfer coefficient assigned to the equivalent model is increased until the deviation between the average temperature rise of the equivalent model and the reference temperature rise is within the second specified range, thus obtaining the target equivalent model of the electrical component; or, If the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component exceeds the second specified range, and the average temperature rise of the equivalent model of the electrical component is less than the reference temperature rise of the electrical component, the equivalent convective heat transfer coefficient assigned to the equivalent model of the electrical component is reduced until the deviation between the average temperature rise of the equivalent model of the electrical component and the reference temperature rise of the electrical component is within the second specified range, thereby obtaining the target equivalent model of the electrical component.

14. The equivalent modeling apparatus according to claim 10, characterized in that, The step of determining the equivalent parameters of the electrical component based on its electrical component parameters and a simplified electrical component model includes: For any electrical component, the equivalent specific heat capacity of the electrical component is determined based on the overall reference mass and reference resistance of the electrical component, the joint mass and specific heat capacity of the joint of the electrical component, as well as the reference current, operating time and reference temperature rise of the electrical component. The equivalent density of the electrical component is determined based on its reference mass, the joint mass, and the dimensional information of its three-dimensional constant cross-sectional configuration. The equivalent resistivity of the electrical component is determined based on its reference resistance and the dimensional information of its three-dimensional constant cross-sectional configuration.

15. An electrical component selection device for electrical equipment, comprising the equivalent modeling device according to any one of claims 9-14, characterized in that, The electrical component selection device also includes: An electrical component evaluation module is used to: obtain the preset operating temperature range of the electrical component in the electrical equipment; determine the simulated operating temperature of the electrical component under a reference operating condition based on the thermoelectric coupling simulation equivalent model of the electrical equipment; and determine that the electrical component in the electrical equipment is a suitable electrical component if the simulated operating temperature of the electrical component under the reference operating condition is within the preset operating temperature range of the electrical component.

16. The electrical component selection device according to claim 15, characterized in that, The electrical component selection device also includes: The model update module is used to: replace any electrical component whose simulated operating temperature exceeds the preset operating temperature range under reference conditions in the thermoelectric coupling simulation equivalent model; determine the equivalent parameters of the replaced electrical component based on the electrical component parameters; and update the thermoelectric coupling simulation equivalent model of the electrical equipment using the equivalent parameters of the replaced electrical component until the simulated operating temperature of the electrical component under reference conditions calculated using the updated thermoelectric coupling simulation equivalent model is within the preset operating temperature range of the electrical component.

17. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to implement the equivalent modeling method of any one of claims 1 to 6 or the electrical component selection method of any one of claims 7 to 8 when executing instructions stored in the memory.

18. A non-volatile computer-readable storage medium storing computer program instructions thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the equivalent modeling method according to any one of claims 1 to 6 or the electrical component selection method according to any one of claims 7 to 8.

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