Flow battery stack assembly simulation method, device and equipment and storage medium

Abstract

The invention discloses a flow battery pile assembly simulation method, device and equipment and a storage medium, and relates to the technical field of batteries, the method comprises the following steps: obtaining a pile three-dimensional model, carrying out geometric grid division on end plates at two sides in the pile three-dimensional model according to a fastener contact area, and obtaining a fastener contact area; a reference point and a corresponding control area are determined, a motion constraint relation is established, and a pre-tightening connector and a displacement coordination connector are arranged at the control area based on the reference point; a fastener pre-tightening force is applied through the pre-tightening connector, and stress deformation simulation is performed on the galvanic pile assembly through the displacement coordination connector according to the motion constraint relation; and establishing a stress balance relation of the reference points according to a simulation result, and obtaining the pre-tightening force of the assembled fastener. According to the method, the constraint condition and the stress deformation condition in the assembly process are truly simulated by accurately constructing the three-dimensional model of the galvanic pile and performing grid division on the key area, and the pre-tightening force data of the assembled fastener are provided, so that the actual assembly process of the galvanic pile of the flow battery can be effectively guided.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, device, equipment and storage medium for simulating the assembly of a flow battery stack. Background Art

[0002] As a core component of large-scale energy storage systems, the quality of flow battery stack assembly directly impacts energy conversion efficiency and service life. During stack assembly, precise control is required for press loading, holding, fastener tightening, and unloading to ensure the stack's internal flow channel sealing, bipolar plate flatness, and electrode material compression ratio meet design requirements.

[0003] To guide actual stack assembly, numerical simulations of the current assembly process can be performed. However, these simulations typically address boundary conditions by only fixing one end plate and applying uniform pressure, omitting key assembly steps such as fastening fasteners. This can lead to deviations between the simulation results and the actual assembly process. Summary of the Invention

[0004] The main purpose of this application is to provide a method, device, equipment and storage medium for simulating the assembly of a flow battery stack, aiming to solve the technical problem that the existing method does not cover key links such as fastening of fasteners when performing numerical simulation of the stack assembly, resulting in deviations between the simulation results and the actual assembly process.

[0005] To achieve the above objectives, the present application proposes a flow battery stack assembly simulation method, the method comprising:

[0006] Obtaining a three-dimensional model of the fuel cell stack, and performing geometric meshing on the end plates on both sides of the three-dimensional model of the fuel cell stack according to the fastener contact area, and determining the reference point and the corresponding control area;

[0007] Establishing a motion constraint relationship between the reference point and the control area, and setting a preload connector and a displacement coordination connector at the control area based on the reference point;

[0008] Applying a fastener pre-tightening force through the pre-tightening connector, and performing a force deformation simulation on the fuel cell stack assembly in the fuel cell stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector;

[0009] A force balance relationship of the reference point is established based on the simulation results to obtain the preload force of the fastener after assembly.

[0010] In one embodiment, the step of geometrically meshing the end plate portion in the three-dimensional model of the stack according to the fastener contact area and determining the reference point and the corresponding control area includes:

[0011] Establishing a reference point based on the geometric center of the fastener contact area;

[0012] The two side end plates are geometrically segmented with the fastener contact area as a boundary to determine a non-controlled area and a controlled area corresponding to the reference point, where the controlled area is a geometric area centered on the reference point.

[0013] In one embodiment, the step of setting the pre-tightening connector and the displacement coordination connector at the control area based on the reference point includes:

[0014] Taking a reference point on one end plate as a reference, a pre-tightening connector is created together with a corresponding reference point on the other end plate, and all pre-tightening connectors connecting the end plates on both sides are created in sequence based on each reference point;

[0015] Taking a reference point on the end plate on one side as a reference, a displacement coordination connector of the pre-tightening connector is created together with a corresponding reference point on the end plate on the other side, and displacement coordination connectors of all pre-tightening connectors are created based on each reference point in turn.

[0016] In one embodiment, the step of applying a fastener pre-tightening force through the pre-tightening connector includes:

[0017] Determining a gravity load condition and a displacement restriction condition of an end plate on one side according to simulation requirement information, and applying them to the three-dimensional model of the fuel cell stack;

[0018] When the displacement coordination connector is in an inactive state, a preset press-fitting force is applied to the end plate on the other side, and a fastener pre-tightening force is applied to the pre-tightening connector.

[0019] In one embodiment, the step of performing force deformation simulation on the fuel cell stack components in the fuel cell stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector includes:

[0020] activating the displacement coordination connector to simulate the stress and deformation of the stack components in the three-dimensional model of the stack after being acted upon by fasteners according to the motion constraint relationship;

[0021] The preset pressing force is unloaded to simulate the elastic rebound deformation of the battery stack assembly according to the mechanical performance parameters of the battery stack assembly.

[0022] In one embodiment, the step of establishing the force balance relationship of the reference point based on the simulation results to obtain the preload force of the assembled fastener includes:

[0023] Obtaining the force components of the reference point in various directions according to the simulation results, and establishing a force balance equation based on the force components;

[0024] The force balance equation is solved to obtain the preload force of the assembled fastener.

[0025] In one embodiment, the step of obtaining the three-dimensional model of the fuel cell stack includes:

[0026] Obtain the original 3D model;

[0027] Performing geometric cleaning on the fuel cell stack components in the original three-dimensional model;

[0028] Obtaining mechanical performance parameters of the fuel cell stack assembly;

[0029] The original three-dimensional model is meshed based on the battery stack components, and the mechanical performance parameters are assigned to the meshed original three-dimensional model to obtain a battery stack three-dimensional model.

[0030] In addition, to achieve the above-mentioned purpose, the present application also provides a flow battery stack assembly simulation device, the device comprising:

[0031] A meshing module is used to obtain a three-dimensional model of the stack and perform geometric meshing on the end plates on both sides of the stack according to the fastener contact area to determine the reference point and the corresponding control area;

[0032] a connector construction module, configured to establish a motion constraint relationship between the reference point and the control area, and to set a preload connector and a displacement coordination connector at the control area based on the reference point;

[0033] a force application module, configured to apply a fastener pre-tightening force through the pre-tightening connector, and perform a force deformation simulation on the stack assembly in the stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector;

[0034] The data analysis module is used to establish a force balance relationship of the reference point according to the simulation results and obtain the preload force of the fastener after assembly.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a liquid flow battery stack assembly simulation device, which includes: a memory, a processor, and a liquid flow battery stack assembly simulation program stored on the memory and runnable on the processor, and the computer program is configured to implement the steps of the liquid flow battery stack assembly simulation method as described above.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and stores a liquid flow battery stack assembly simulation program. When the liquid flow battery stack assembly simulation program is executed by the processor, the steps of the liquid flow battery stack assembly simulation method described above are implemented.

[0037] The present application proposes a method for simulating the assembly of a flow battery stack, which obtains a three-dimensional model of the stack and geometrically meshes the end plates on both sides of the stack three-dimensional model according to the fastener contact area to determine the reference point and the corresponding control area; establishes a motion constraint relationship between the reference point and the control area, and sets a pre-tightening connector and a displacement coordination connector at the control area based on the reference point; applies a fastener pre-tightening force through the pre-tightening connector, and simulates the stress and deformation of the stack components in the stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector; establishes a force balance relationship of the reference point based on the simulation results, and obtains the fastener pre-tightening force after assembly. The present application can accurately construct a three-dimensional model of the stack and mesh the key areas, realistically simulate the constraints and stress and deformation conditions in the assembly process, comprehensively evaluate the assembly effect, and provide fastener pre-tightening force data after assembly, thereby effectively guiding the assembly process optimization of the flow battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 This is a flow chart of the first embodiment of the flow battery stack assembly simulation method of the present application;

[0041] Figure 2 This is a flow chart of the second embodiment of the flow battery stack assembly simulation method of the present application;

[0042] Figure 3 This is a flow chart of the third embodiment of the flow battery stack assembly simulation method of the present application;

[0043] Figure 4 This is a schematic diagram of the module structure of the first embodiment of the flow battery stack assembly simulation device of the present application;

[0044] Figure 5 Schematic diagram of the equipment structure of the hardware operating environment involved in the flow battery stack assembly simulation method in the embodiment of the present application. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0046] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The present invention provides a flow battery stack assembly simulation method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the flow battery stack assembly simulation method of the present application. In this embodiment, the method includes steps S10 to S40:

[0048] Step S10: Obtain a three-dimensional model of the fuel cell stack, and perform geometric meshing on the end plates on both sides of the three-dimensional model of the fuel cell stack according to the fastener contact area, and determine the reference point and the corresponding control area.

[0049] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or other electronic devices that can perform the same or similar functions. The following uses a flow battery stack assembly simulation device (hereinafter referred to as the "simulation device") as an example to illustrate this embodiment and the following embodiments.

[0050] It should be understood that the flow battery stack, as the main structure of the battery, can be composed of one or more single cells stacked together, and the stack needs to be assembled and tightened during the stacking process. Therefore, the flow battery stack can be divided into two outer end plates and a central stack assembly.

[0051] Furthermore, in order to optimize the geometric structure of the three-dimensional model of the stack, step S10 specifically includes steps S101 to S104:

[0052] Step S101: Acquire an original three-dimensional model.

[0053] It should be understood that the original three-dimensional model can be constructed from a three-dimensional digital twin model based on the battery stack parameters in actual needs, and the original three-dimensional model includes the geometric shape and structural information of the battery stack components.

[0054] Step S102: performing geometric cleaning on the fuel cell stack components in the original three-dimensional model.

[0055] It should be noted that the stack assembly is the model structure of the original 3D model except for the two side end plates. To ensure the accuracy and efficiency of subsequent simulations, geometry cleaning can be performed to remove redundant geometric features and repair model defects in the original 3D model.

[0056] It should be understood that the geometry cleaning operation may include: removing redundant features, being able to delete small geometric features that do not affect the simulation results, such as small holes, grooves, etc., to simplify the model; repairing model defects: ensuring the geometric continuity of the model by repairing defects such as gaps, overlapping surfaces, and non-manifold edges in the model; unifying units and coordinate systems: ensuring that the units (such as millimeters and meters) and coordinate systems of the model are consistent with the display coordinate system in the simulation device to avoid unit and coordinate conversion problems in subsequent processing.

[0057] Step S103: Obtaining mechanical performance parameters of the fuel cell stack assembly.

[0058] It should be noted that the mechanical performance parameters may be mechanical performance parameters of the fuel cell stack components obtained from a material database or experimental tests, such as elastic modulus, Poisson's ratio, yield strength, etc.

[0059] Step S104: meshing the original three-dimensional model based on the battery stack components, and assigning the mechanical performance parameters to the meshed original three-dimensional model to obtain a battery stack three-dimensional model.

[0060] It is understandable that an appropriate mesh type (such as tetrahedral mesh, hexahedral mesh) and size can be selected to mesh the stack components except the end plates on both sides in the original three-dimensional model according to the geometric complexity of the model and the expected simulation accuracy, so as to ensure that the mesh quality meets the simulation requirements and avoid the appearance of mesh units that are too small, too flat or distorted, so as to ensure the accuracy of the simulation results.

[0061] In the specific implementation, the mechanical performance parameters can be assigned to the meshed model, thereby associating these mechanical performance parameters with the corresponding components in the model, ensuring that the material properties of each component are accurately reflected in subsequent simulations.

[0062] Furthermore, after completing the grid division of the battery stack assembly, it is necessary to grid the end plates on both sides. Therefore, step S10 further includes steps S104 to S105:

[0063] Step S104: establishing a reference point based on the geometric center of the fastener contact area.

[0064] Step S105: geometrically segmenting the two end plates using the fastener contact area as a boundary to determine a non-controlled area and a controlled area corresponding to the reference point.

[0065] It should be understood that the fastener contact area refers to the area on the two end plates. A fastener can be a mechanical part such as a bolt or rivet used for fastening. Bolts are used as an example here, so the fastener area is the bolt contact area, which can be the area where the bolt head or nut contacts the end plates. For example, if the bolt head is circular, the geometric center can be the center of the circle.

[0066] In a specific implementation, the bolt contact area is used as the dividing line to segment the end plates on both sides of the stack 3D model, thereby distinguishing between areas requiring special treatment (controlled areas) and areas for routine treatment (non-controlled areas). The controlled area is a geometric region centered on a reference point and can include the bolt contact area and its surrounding areas. The number of reference points can be different.

[0067] Step S20: establishing a motion constraint relationship between the reference point and the control area, and setting a pre-tightening connector and a displacement coordination connector at the control area based on the reference point.

[0068] It should be understood that the reference point can be used to control all translational degrees of freedom of the grid in the control area corresponding to the reference point in the three-dimensional model of the fuel cell stack, that is, a motion constraint relationship is established between the reference point and the control area to ensure that each grid maintains consistent movement during the subsequent simulation process, so as to truly reflect the mutual constraints between the components in the actual assembly process, avoid unreasonable free movement of the fuel cell stack components in the simulation, and improve the credibility of the simulation results.

[0069] It should also be noted that in the three-dimensional model processing software for simulation equipment (such as Abaqus), preload connectors and displacement coordination connectors can be created based on reference points to describe the bolt preload and the stress-deformation behavior of the coordination resistor element, respectively.

[0070] Specifically, a reference point on one end plate can be used as a reference to create a pre-tightening connector together with a corresponding reference point on the other end plate, and this step can be repeated to create all pre-tightening connectors connecting the end plates on both sides based on each reference point; then, a reference point on one end plate can be used as a reference to create a displacement coordination connector of a pre-tightening connector together with a corresponding reference point on the other end plate, and this step can be repeated to create all displacement coordination connectors of pre-tightening connectors based on each reference point. The pre-tightening connectors and displacement coordination connectors set based on the reference points on the end plates on both sides can be referenced. Figure 2 , Figure 2 This is a schematic diagram of the setting position of the preload connector and the displacement coordination connector. Figure 2 The concentric circles on one end plate located in the upper layer represent the control area of the reference point on that side, and the dotted circle on the other end plate located in the lower layer represents the control area of the reference point on that side.

[0071] Step S30: applying a fastener pre-tightening force through the pre-tightening connector, and performing a force deformation simulation on the fuel cell stack components in the fuel cell stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector.

[0072] It should be understood that the pre-tightening force of the bolts is applied through the pre-tightening connector, thereby simulating the bolt tightening process and ensuring that the force transmission and distribution conform to the actual assembly situation. Then, the displacement coordination connector can be used to simulate the force deformation of the battery stack assembly according to the motion constraint relationship, thereby simulating the deformation of the battery stack assembly under the action of the pre-tightening force. Among them, the displacement coordination connector can ensure that the displacement of each component is coordinated and consistent during the force process, avoiding stress concentration or component damage caused by inconsistent displacement.

[0073] Step S40: establishing a force balance relationship of the reference point according to the simulation results, and obtaining the pre-tightening force of the fastener after assembly.

[0074] In specific implementation, the force conditions of the reference point can be obtained according to the simulation results, including the force components in various directions to establish a force balance equation, and then the actual preload force of the bolt after assembly can be calculated by solving the equation.

[0075] This embodiment implements a complete process from acquiring a three-dimensional stack model to simulating the assembly process through key steps including model preparation, meshing, reference point determination, constraint establishment, preload application, deformation simulation, and result analysis. Specifically, by accurately constructing a three-dimensional stack model and meshing key areas, realistically simulating the constraints and force deformations during assembly, comprehensively evaluating assembly results and providing post-assembly fastener preload data, effectively guiding the actual assembly process of flow battery stacks.

[0076] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 3 , Figure 3 This is a flow chart of the second embodiment of the flow battery stack assembly simulation method of the present application.

[0077] In this embodiment, in order to specifically illustrate how to apply the fastener pre-tightening force, step S30 specifically includes: steps S301 to S304:

[0078] Step S301: Determine the gravity load condition and the displacement restriction condition of the end plate on one side according to the simulation requirement information, and apply them to the three-dimensional model of the fuel cell stack.

[0079] It should be understood that the gravity load condition may be the force requirement of the battery stack model under the action of gravity, which is used to simulate the influence of gravity on the battery stack during actual assembly and use.

[0080] The displacement restriction condition may be a displacement constraint set for one side end plate, which can simulate a state in which the end plate is fixed in actual assembly.

[0081] In the specific implementation, gravity load boundary conditions are applied to the entire three-dimensional model of the fuel cell stack and displacement restriction conditions are set for one side end plate, so that the determined gravity load and displacement restriction are applied to the three-dimensional model of the fuel cell stack, which can provide a basis for subsequent preload application and deformation simulation.

[0082] Step S302: When the displacement coordination connector is in an inactive state, a preset press-fitting force is applied to the end plate on the other side, and the preset press-fitting force is converted into a fastener pre-tightening force for the pre-tightening connector.

[0083] It should be understood that before applying the preset press force, the displacement coordination connector can be deactivated to simulate the free deformation behavior of the stack assembly during the initial loading stage to avoid prematurely restricting the displacement of the stack assembly.

[0084] In the specific implementation, when the displacement coordination connector is in the disabled state, a preset pressing force is applied to one side end plate to simulate the press loading process in the actual assembly process; then the tightening force of the bolt is applied to the pre-tightening connector to simulate the bolt tightening process in the actual assembly.

[0085] Step S303: activating the displacement coordination connector to simulate the stress and deformation of the stack components in the stack three-dimensional model after the fasteners act on them according to the motion constraint relationship.

[0086] It should be understood that after the bolt preload is applied, the displacement coordination connector is enabled to ensure that the displacement of the stack components is coordinated and consistent, thereby simulating the mutual constraints and coordination between the stack components after the bolts are tightened during the actual assembly process.

[0087] The displacement coordination connector can work according to the previously established motion constraint relationship to ensure that the displacement within the control area corresponding to the reference point is coordinated with the displacement of the entire model to avoid local excessive deformation or stress concentration.

[0088] It should be noted that after the displacement coordination connector is enabled, the stress deformation simulation of the battery stack assembly is performed, thereby taking into account the influence of the fastener preload on the battery stack assembly and simulating the deformation of the battery stack under the action of the preload.

[0089] Step S304: Unloading the preset press force to simulate elastic rebound deformation of the fuel cell assembly according to the mechanical performance parameters of the fuel cell assembly.

[0090] It is understood that by unloading the preset press force, the rebound behavior of the battery stack assembly after the press is unloaded can be simulated. Specifically, based on the mechanical performance parameters of the battery stack assembly (such as elastic modulus, Poisson's ratio, etc.), elastic rebound deformation simulation can be performed to obtain the final assembly state of the battery stack assembly.

[0091] Further, in order to specifically explain how to obtain the bolt preload force after final assembly, step S40 specifically includes: steps S401 to S402:

[0092] Step S401: Obtain the force components of the reference point in various directions according to the simulation results, and establish a force balance equation based on the force components.

[0093] It should be understood that the simulation result can be a three-dimensional model of the battery stack in the final assembly state, so that the force components of the reference point in various directions (usually X, Y and Z directions) in the final assembly state can be directly obtained.

[0094] In practice, the simulation device can use the tools and interfaces provided by the 3D model processing software to extract the force components at the reference point and establish a force equilibrium equation. This force return ensures that the resultant force at the reference point in all directions is zero, indicating that the reference point is in a state of static equilibrium.

[0095] Step S402: Solve the force balance equation to obtain the preload force of the assembled fastener.

[0096] It should be understood that the force balance equation can be solved by numerical methods to obtain the specific values of the force components of the reference point in various directions. Then, based on the solution results, the bolt preload after assembly can be calculated. The calculation formula for the bolt preload after assembly can be:

[0097] P=∑F pre

[0098] Among them, F pre Indicates the components of the bolt preload in each direction after assembly.

[0099] It should also be noted that when the number of reference points is not unique, the bolt preload force after assembly at each reference point can be calculated based on the above process, thereby guiding the design and selection of bolts in the subsequent actual flow battery stack assembly process, and avoiding the uneven distribution of pressure and deformation of the stack assembly due to the simulation process not taking into account the rebound amount and inconsistent bolt preload force of different bolts.

[0100] This embodiment determines the gravity load condition and the displacement restriction condition of the end plate on one side according to the simulation requirement information, and applies them to the three-dimensional model of the stack; when the displacement coordination connector is in the deactivated state, a preset pressing force is applied to the end plate on the other side, so that the pre-tightening connector converts the preset pressing force into a fastener pre-tightening force; the displacement coordination connector is activated to simulate the stress and deformation of the stack assembly in the three-dimensional model of the stack after the fastener is applied according to the motion constraint relationship; the preset pressing force is unloaded to simulate the elastic rebound deformation of the stack assembly according to the mechanical performance parameters of the stack assembly; thereby ensuring the accuracy and reliability of the simulation results and providing a scientific basis for optimizing the assembly process of the flow battery stack. Then, the force components of the reference point in each direction are obtained according to the simulation results, and a force balance equation is established based on each force component; the force balance equation is solved to provide the fastener pre-tightening force data after the stack assembly is completed, thereby avoiding component damage or stack airtightness problems in the actual assembly process due to simulation deviation.

[0101] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the flow battery stack assembly simulation method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0102] In addition, the present application also provides a flow battery stack assembly simulation device, referring to Figure 4 , Figure 4 This is a structural block diagram of the first embodiment of the flow battery stack assembly simulation device of the present application; Figure 4 As shown, the device includes:

[0103] A mesh generation module 401 is used to obtain a three-dimensional model of the stack and perform geometric mesh generation on the end plates on both sides of the stack according to the fastener contact area to determine the reference point and the corresponding control area;

[0104] A connector construction module 402 is configured to establish a motion constraint relationship between the reference point and the control area, and to set a pre-tightening connector and a displacement coordination connector at the control area based on the reference point;

[0105] a force application module 403 for applying a fastener pre-tightening force through the pre-tightening connector, and performing a force deformation simulation on the stack components in the stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector;

[0106] The data analysis module 404 is used to establish a force balance relationship of the reference point according to the simulation results, and obtain the preload force of the fastener after assembly.

[0107] Furthermore, the mesh division module 401 is also used to obtain the original three-dimensional model; perform geometric cleaning on the battery stack components in the original three-dimensional model; obtain the mechanical performance parameters of the battery stack components; mesh the original three-dimensional model based on the battery stack components, and assign the mechanical performance parameters to the original three-dimensional model after meshing to obtain the battery stack three-dimensional model; establish a reference point based on the geometric center of the fastener contact area; geometrically divide the two side end plates with the fastener contact area as the boundary, and determine the non-control area and the control area corresponding to the reference point, where the control area is a geometric area centered on the reference point.

[0108] Furthermore, the connector construction module 402 is also used to create a pre-tightening connector based on a reference point on one side end plate and a corresponding reference point on the other side end plate, and to create all pre-tightening connectors connecting the two side end plates based on each reference point in turn; to create a displacement coordination connector of the pre-tightening connector based on a reference point on one side end plate and a corresponding reference point on the other side end plate, and to create displacement coordination connectors of all pre-tightening connectors based on each reference point in turn.

[0109] Furthermore, the force action module 403 is also used to determine the gravity load condition and the displacement restriction condition of the end plate on one side according to the simulation requirement information, and apply them to the three-dimensional model of the battery stack; when the displacement coordination connector is in an inactive state, a preset pressing force is applied to the end plate on the other side, and a fastener pre-tightening force is applied to the pre-tightening connector; the displacement coordination connector is enabled to simulate the force deformation of the battery stack assembly in the three-dimensional model of the battery stack after the action of the fastener according to the motion constraint relationship; and the preset pressing force is unloaded to simulate the elastic rebound deformation of the battery stack assembly according to the mechanical performance parameters of the battery stack assembly.

[0110] Furthermore, the data analysis module 404 is also used to obtain the force components of the reference point in various directions according to the simulation results, and establish a force balance equation based on each of the force components; solve the force balance equation to obtain the preload force of the assembled fastener.

[0111] This embodiment implements a complete process from acquiring a three-dimensional stack model to simulating the assembly process through key steps including model preparation, meshing, reference point determination, constraint establishment, preload application, deformation simulation, and result analysis. Specifically, by accurately constructing a three-dimensional stack model and meshing key areas, realistically simulating the constraints and force deformations during assembly, comprehensively evaluating assembly results and providing post-assembly fastener preload data, effectively guiding the actual assembly process of flow battery stacks.

[0112] In addition, the present application also provides a liquid flow battery stack assembly simulation device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the liquid flow battery stack assembly simulation method in the above-mentioned embodiment one.

[0113] Reference below Figure 5 , Figure 5 The schematic diagram of the structure of the flow battery stack assembly simulation device of the present application. The flow battery stack assembly simulation device in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), etc., as well as fixed terminals such as digital TVs and desktop computers. Figure 5 The flow battery stack assembly simulation device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0114] like Figure 5As shown, the flow battery stack assembly simulation device may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 to the random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the flow battery stack assembly simulation device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the flow battery stack assembly simulation device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a flow battery stack assembly simulation device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0115] In addition, the present application also provides a computer-readable storage medium having computer-readable program instructions (ie, a computer program) stored thereon, and the computer-readable program instructions are used to execute the liquid flow battery stack assembly simulation method in the above-mentioned embodiment.

[0116] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0117] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional elements in the process, method, article, or system comprising the element.

[0118] The serial numbers of the above-mentioned embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments. Moreover, they are only some embodiments of the present application and do not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the description and drawings of the present application under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A flow battery stack assembly simulation method, characterized in that: The method comprises: Obtaining a three-dimensional model of the stack, and performing geometric meshing on the end plates on both sides of the stack according to the fastener contact area, to determine the reference point and the corresponding control area; Establishing a motion constraint relationship between the reference point and the control area, and setting a preload connector and a displacement coordination connector at the control area based on the reference point; Applying a fastener pre-tightening force through the pre-tightening connector, and performing a force deformation simulation on the fuel cell assembly in the fuel cell three-dimensional model according to the motion constraint relationship through the displacement coordination connector; A force balance relationship of the reference point is established based on the simulation results to obtain the preload force of the fastener after assembly.

2. The method according to claim 1, wherein The step of geometrically meshing the end plate portion in the three-dimensional model of the stack according to the fastener contact area and determining the reference point and the corresponding control area includes: Establishing a reference point based on the geometric center of the fastener contact area; The two side end plates are geometrically segmented with the fastener contact area as a boundary to determine a non-controlled area and a controlled area corresponding to the reference point, where the controlled area is a geometric area centered on the reference point.

3. The method according to claim 1, wherein The step of setting a pre-tightening connector and a displacement coordination connector at the control area based on the reference point includes: Taking a reference point on one end plate as a reference, a pre-tightening connector is created together with a corresponding reference point on the other end plate, and all pre-tightening connectors connecting the end plates on both sides are created in sequence based on each reference point; Taking a reference point on the end plate on one side as a reference, a displacement coordination connector of the pre-tightening connector is created together with a corresponding reference point on the end plate on the other side, and displacement coordination connectors of all pre-tightening connectors are created based on each reference point in turn.

4. The method according to claim 3, wherein The step of applying a pre-tightening force to the fastener through the pre-tightening connector comprises: Determining a gravity load condition and a displacement restriction condition of an end plate on one side according to simulation requirement information, and applying them to the three-dimensional model of the fuel cell stack; When the displacement coordination connector is in an inactive state, a preset press-fitting force is applied to the end plate on the other side, and a fastener pre-tightening force is applied to the pre-tightening connector.

5. The method according to claim 4, wherein The step of simulating the stress and deformation of the battery stack components in the battery stack three-dimensional model by using the displacement coordination connector according to the motion constraint relationship includes: activating the displacement coordination connector to simulate the stress and deformation of the stack components in the three-dimensional model of the stack after being acted upon by fasteners according to the motion constraint relationship; The preset pressing force is unloaded to simulate the elastic rebound deformation of the battery stack assembly according to the mechanical performance parameters of the battery stack assembly.

6. The method according to claim 1, wherein The step of establishing the force balance relationship of the reference point according to the simulation results to obtain the preload force of the fastener after assembly includes: Obtaining the force components of the reference point in various directions according to the simulation results, and establishing a force balance equation based on the force components; The force balance equation is solved to obtain the preload force of the assembled fastener.

7. The method according to claim 1, wherein The step of obtaining the three-dimensional model of the battery stack includes: Obtain the original 3D model; Performing geometric cleaning on the fuel cell stack components in the original three-dimensional model; Obtaining mechanical performance parameters of the fuel cell stack assembly; The original three-dimensional model is meshed based on the battery stack components, and the mechanical performance parameters are assigned to the meshed original three-dimensional model to obtain a battery stack three-dimensional model.

8. A flow battery stack assembly simulation device, characterized in that: The device comprises: A meshing module is used to obtain a three-dimensional model of the stack and perform geometric meshing on the end plates on both sides of the stack according to the fastener contact area to determine the reference point and the corresponding control area; a connector construction module, configured to establish a motion constraint relationship between the reference point and the control area, and to set a preload connector and a displacement coordination connector at the control area based on the reference point; a force application module, configured to apply a fastener pre-tightening force through the pre-tightening connector, and perform a force deformation simulation on the stack assembly in the stack three-dimensional model according to the motion constraint relationship through the displacement coordination connector; The data analysis module is used to establish a force balance relationship of the reference point according to the simulation results and obtain the preload force of the fastener after assembly.

9. A flow battery stack assembly simulation device, characterized in that: The device includes: a memory, a processor, and a liquid flow battery stack assembly simulation program stored in the memory and executable on the processor, wherein the liquid flow battery stack assembly simulation program is configured to implement the steps of the liquid flow battery stack assembly simulation method according to any one of claims 1 to 7.

10. A computer storage medium, characterized in that The computer storage medium stores a flow battery stack assembly simulation program, which, when executed by a processor, implements the steps of the flow battery stack assembly simulation method according to any one of claims 1 to 7.

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