Bus welding parameter optimization method, device and equipment and readable storage medium

Abstract

The application discloses a bus welding parameter optimization method, device and equipment and a readable storage medium, and relates to the technical field of welding. The method comprises the following steps: step S10, a bus welding simulation model is established; step S20, a welding trajectory and a temperature field thereof are obtained by simulation according to initial welding parameters; step S30, welding seam parameters of multiple nodes in the welding trajectory are determined according to the welding trajectory and the temperature field thereof; step S40, an overcurrent area of the welding trajectory is calculated according to the welding seam parameters of the multiple nodes; step S50, the overcurrent area of the welding trajectory is set as an optimization target, welding parameters are continuously adjusted, and steps S20 to S40 are repeated until the overcurrent area of the welding trajectory exceeds a preset area threshold, so that the current welding parameters are optimal welding parameters. The application can greatly reduce the number of process tests, can quickly determine welding parameters of bus laser welding processes, can improve production efficiency, and can reduce production cost.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a method, apparatus, equipment, and readable storage medium for optimizing bus welding parameters. Background Technology

[0002] With the rapid development of new energy vehicles, batteries, as a core component, have become a top priority for major OEMs in their self-developed technologies. New technologies are constantly emerging, and batteries are currently moving towards CTP (Cell-to-Pack) technology. This involves placing all the cells into a battery box and then welding the busbars (connecting all cells in series and parallel). Laser welding is used for busbar welding, and the welding parameters have a significant impact on the welding quality. Inappropriate welding parameters can easily lead to serious welding defects such as weld misalignment, weld burn-through, and pores. These defects are irreparable and will directly result in the scrapping of the entire battery pack. Therefore, optimizing welding parameters in advance is beneficial for improving welding quality.

[0003] Currently, optimizing busbar welding parameters requires extensive process testing, multiple cross-sectional sections, and metallographic analysis. This approach is time-consuming and costly. Summary of the Invention

[0004] This invention provides a method, apparatus, device, and readable storage medium for optimizing bus welding parameters, which solves the technical problem that existing bus welding parameter optimization requires a large number of process experiments, which is time-consuming and costly.

[0005] Firstly, a method for optimizing bus welding parameters is provided, including the following steps:

[0006] Step S10: Establish a busbar welding simulation model;

[0007] Step S20: Simulate the welding trajectory and its temperature field based on the initial welding parameters;

[0008] Step S30: Determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field;

[0009] Step S40: Calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes;

[0010] Step S50: Set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat steps S20 to 40 until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold. The current welding parameters are then taken as the optimal welding parameters.

[0011] In some embodiments, determining the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field includes:

[0012] Multiple nodes are selected on the welding trajectory, and a cross-section is cut along the thickness direction of the busbar at each node of the welding trajectory to determine the point cloud map of the cross-section where the temperature is greater than the melting point of the base material.

[0013] Determine the two closest points in the point cloud along the thickness direction of the busbar, and use the distance between these two points as the weld penetration depth of the node;

[0014] Then draw a line along the width of the busbar with the weld penetration depth as the reference. The distance between the two farthest points on this line is taken as the weld penetration width of the node.

[0015] Connect the center points of the rectangular frame formed by the weld penetration and weld width of all nodes to obtain the welding trajectory circle. Determine the radius of each node and the central angle between the node and the previous node based on the welding trajectory circle.

[0016] In some embodiments, calculating the overcurrent area of ​​the welding trajectory based on weld parameters of multiple nodes includes:

[0017] First, calculate the overcurrent area of ​​a node based on the weld width, radius, and central angle between the node and the previous node.

[0018] The overcurrent area of ​​the welding trajectory is obtained by summing the overcurrent areas of multiple nodes.

[0019] In some embodiments, setting the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjusting the welding parameters, and repeating steps S20 to S40 until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, and taking the current welding parameters as the optimal welding parameters, includes:

[0020] Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

[0021] Secondly, a busbar welding parameter optimization device is provided, comprising:

[0022] A modeling unit, used to establish a busbar welding simulation model;

[0023] The simulation unit is used to simulate the welding trajectory and its temperature field based on the initial welding parameters.

[0024] A determining unit is used to determine weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field.

[0025] A calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes.

[0026] An optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination and calculation process of the simulation unit, the determination unit and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds the preset area, and the current welding parameters are taken as the optimal welding parameters.

[0027] In some embodiments, the determining unit is used to determine weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field, including:

[0028] Multiple nodes are selected on the welding trajectory, and a cross-section is cut along the thickness direction of the busbar at each node of the welding trajectory to determine the point cloud map of the cross-section where the temperature is greater than the melting point of the base material.

[0029] Determine the two closest points in the point cloud along the thickness direction of the busbar, and use the distance between these two points as the weld penetration depth of the node;

[0030] Then draw a line along the width of the busbar with the weld penetration depth as the reference. The distance between the two farthest points on this line is taken as the weld penetration width of the node.

[0031] Connect the center points of the rectangular frame formed by the weld penetration and weld width of all nodes to obtain the welding trajectory circle. Determine the weld width, radius, and central angle of each node relative to the previous node based on the welding trajectory circle.

[0032] In some embodiments, the calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on weld parameters of multiple nodes, including:

[0033] First, calculate the overcurrent area of ​​a node based on the weld width, radius, and central angle between the node and the previous node.

[0034] The overcurrent area of ​​the welding trajectory is obtained by summing the overcurrent areas of multiple nodes.

[0035] In some embodiments, the optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination, and calculation processes of the simulation unit, the determination unit, and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds a preset area, and the current welding parameters are taken as the optimal welding parameters, including:

[0036] Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

[0037] Thirdly, a computer device is provided, comprising: a memory and a processor, wherein the memory stores at least one instruction, the at least one instruction being loaded and executed by the processor to implement the aforementioned busbar welding parameter optimization method.

[0038] Fourthly, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions, which, when executed by a computer, cause the computer to perform the aforementioned busbar welding parameter optimization method.

[0039] The beneficial effects of the technical solution provided by this invention include:

[0040] This invention provides a method, apparatus, device, and readable storage medium for optimizing bus welding parameters. First, a bus welding simulation model is established. Second, the welding trajectory and its temperature field are obtained through simulation based on initial welding parameters. Third, the weld parameters of multiple nodes in the welding trajectory are determined based on the welding trajectory and temperature field. Then, the overcurrent area of ​​the welding trajectory is calculated based on the weld parameters of the multiple nodes. Finally, the overcurrent area of ​​the welding trajectory is set as the optimization target. The welding parameters are continuously adjusted, and the simulation, determination, and calculation are repeated until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold. The current welding parameters are then considered the optimal welding parameters. This invention can significantly reduce the number of process experiments, quickly determine the welding parameters for bus laser welding, improve production efficiency, and reduce production costs. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A flowchart illustrating a method for optimizing bus welding parameters provided in an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of implementation step S10 provided in an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the welding trajectory obtained in implementation step S20 of the present invention;

[0045] Figure 4 A flowchart illustrating implementation step S30 provided in an embodiment of the present invention;

[0046] Figure 5 Provided for embodiments of the present invention Figure 3 Point cloud diagram of the temperature field profile of a node in the obtained welding trajectory.

[0047] Figure 6 Another schematic diagram of the welding trajectory obtained in implementation step S20 of the present invention;

[0048] Figure 7 Provided for embodiments of the present invention Figure 6 A diagram showing the radius of a node and its central angle with the previous node;

[0049] Figure 8 A flowchart illustrating implementation step S40 provided in an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram of a busbar welding parameter optimization device provided in an embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] This invention provides a method for optimizing bus welding parameters, which solves the technical problem that existing bus welding parameter optimization requires a large number of process experiments, which is time-consuming and costly.

[0054] See Figure 1 As shown, this embodiment of the invention provides a method for optimizing bus welding parameters, including the following steps:

[0055] Step S10: Establish a busbar welding simulation model.

[0056] Specifically, see Figure 2 As shown, a structural model of support plate 1, copper nozzle 2, positive terminal 3, negative terminal 4, busbar 5, first battery cell 6, and second battery cell 7 is built in simulation software. The support plate is set as a fixed support, the copper nozzle is elastically pressed, and the first battery cell and the second battery cell are connected by adhesive.

[0057] Step S20: Simulate the welding trajectory and its temperature field based on the initial welding parameters.

[0058] Specifically, welding power, welding rate, and welding decoking amount are used as welding parameters. Given the initial welding power, welding rate, and welding decoking amount, the welding trajectory and its temperature field are obtained through simulation software. Figure 3 This is a schematic diagram of the welding trajectory obtained through simulation software.

[0059] Step S30: Determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field.

[0060] Specifically, see Figure 4 The step of determining weld parameters for multiple nodes in the welding trajectory based on the welding trajectory and its temperature field includes:

[0061] Step S301: Select multiple nodes on the welding trajectory, and at each node of the welding trajectory, take a cross-section along the thickness direction of the busbar to determine the point cloud map of the cross-section where the temperature is higher than the melting point of the base material. Specifically, n nodes can be selected on the welding trajectory. Figure 5 This is the point cloud diagram of the temperature field at the i-th node.

[0062] Step S302: Determine the two closest points in the point cloud diagram along the busbar thickness direction, and use the distance between these two points as the weld penetration depth of that node. See also Figure 5 As shown, the weld penetration depth RD of the i-th node is determined. i .

[0063] Step S303: Draw a line along the busbar width direction based on the weld penetration depth. The distance between the two farthest points on this line is taken as the weld penetration width of that node. See also... Figure 5 As shown, the weld width RW of the i-th node is determined. i .

[0064] Step S304: Connect the center points of the rectangle formed by the weld penetration and weld width of all nodes to obtain the weld trajectory circle. Determine the radius of each node and its central angle with the previous node based on the weld trajectory circle. See also Figure 6 and Figure 7 As shown, determine the radius R of the i-th node. i And the central angle θ between the node and the previous node. i .

[0065] Step S40: Calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes.

[0066] Specifically, see Figure 8 As shown, the calculation of the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes includes:

[0067] Step S401: First, calculate the overcurrent area of ​​a node based on the weld width, radius, and the node center angle with the previous node.

[0068] Specifically, according to the formula Calculate the overcurrent area S at the i-th node. i Among them, the weld width RW at the node i The radius R of the node i All units are mm, and the central angle of the node is θ. i The unit is rad.

[0069] Step S402: Then sum the overcurrent areas of multiple nodes to obtain the overcurrent area of ​​the welding trajectory.

[0070] Specifically, according to the formula The overcurrent area S of the entire welding trajectory is obtained.

[0071] Step S50: Set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat steps S20 to 40 until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold. The current welding parameters are then taken as the optimal welding parameters.

[0072] Specifically, the step of setting the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjusting the welding parameters, and repeating steps S20 to S40 until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, and taking the current welding parameters as the optimal welding parameters, includes:

[0073] Welding power, welding speed, and defocusing amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold. It should be noted that during the adjustment of the values ​​of each welding parameter, a strategy of lower welding power, higher welding speed, and moderate defocusing amount should be adopted as much as possible.

[0074] The bus welding parameter optimization method in this invention first establishes a bus welding simulation model; secondly, it simulates the welding trajectory and its temperature field based on initial welding parameters; thirdly, it determines the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field; then, it calculates the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes; finally, it sets the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjusts the welding parameters, and repeats the simulation, determination, and calculation until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, at which point the current welding parameters are considered the optimal welding parameters. This invention can significantly reduce the number of process experiments, quickly determine the welding parameters for bus laser welding, improve production efficiency, and reduce production costs.

[0075] See Figure 9As shown in the figure, this embodiment of the invention also provides a busbar welding parameter optimization device, including: a modeling unit, a simulation unit, a determination unit, a calculation unit, and an optimization unit.

[0076] The modeling unit is used to establish a busbar welding simulation model.

[0077] The simulation unit is used to simulate the welding trajectory and its temperature field based on the initial welding parameters.

[0078] The determining unit is used to determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field.

[0079] The calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes.

[0080] The optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination and calculation process of the simulation unit, the determination unit and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds the preset area, and the current welding parameters are taken as the optimal welding parameters.

[0081] The busbar welding parameter optimization device in this embodiment of the invention comprises the following steps: the modeling unit first establishes a busbar welding simulation model; the simulation unit then simulates the welding trajectory and its temperature field based on initial welding parameters; the determination unit further determines the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field; the optimization unit and the calculation unit then calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of the multiple nodes; finally, the overcurrent area of ​​the welding trajectory is set as the optimization target, and the welding parameters are continuously adjusted, and the simulation, determination, and calculation are repeated until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, at which point the current welding parameters are considered the optimal welding parameters. This invention can significantly reduce the number of process experiments, quickly determine the welding parameters of the busbar laser welding process, improve production efficiency, and reduce production costs.

[0082] As an optional implementation, in one embodiment of the invention, the determining unit is used to determine weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field, including:

[0083] Multiple nodes are selected on the welding trajectory, and a cross-section is cut along the thickness direction of the busbar at each node of the welding trajectory to determine the point cloud map of the cross-section where the temperature is greater than the melting point of the base material.

[0084] Determine the two closest points in the point cloud along the thickness direction of the busbar, and use the distance between these two points as the weld penetration depth of the node;

[0085] Then draw a line along the width of the busbar with the weld penetration depth as the reference. The distance between the two farthest points on this line is taken as the weld penetration width of the node.

[0086] Connect the center points of the rectangular frame formed by the weld penetration and weld width of all nodes to obtain the welding trajectory circle. Determine the weld width, radius, and central angle of each node relative to the previous node based on the welding trajectory circle.

[0087] As an optional implementation, in one embodiment of the invention, the calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes, including:

[0088] First, calculate the overcurrent area of ​​a node based on the weld width, radius, and central angle between the node and the previous node.

[0089] The overcurrent area of ​​the welding trajectory is obtained by summing the overcurrent areas of multiple nodes.

[0090] As an optional implementation, in one embodiment of the invention, the optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination, and calculation processes of the simulation unit, the determination unit, and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds a preset area, and the current welding parameters are taken as the optimal welding parameters, including:

[0091] Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

[0092] This invention also provides a computer device, including: a memory, a processor, and a network interface connected via a system bus, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement all or part of the steps of the aforementioned bus welding parameter optimization method.

[0093] The network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0094] A processor can be a CPU, or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor can be a microprocessor, or any conventional processor. The processor is the control center of a computer device, connecting all parts of the computer device through various interfaces and lines.

[0095] Memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can mainly include a program storage area and a data storage area. The program storage area can store the operating system, at least one application program required for a function (such as video playback, image playback, etc.), etc.; the data storage area can store data created based on the use of the mobile phone (such as video data, image data, etc.). In addition, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital Cards (SD cards), Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0096] In one embodiment of the invention, the processor is used to run a computer program stored in a memory to perform the following steps:

[0097] Step S10: Establish a busbar welding simulation model;

[0098] Step S20: Simulate the welding trajectory and its temperature field based on the initial welding parameters;

[0099] Step S30: Determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field;

[0100] Step S40: Calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes;

[0101] Step S50: Set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat steps S20 to 40 until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold. The current welding parameters are then taken as the optimal welding parameters.

[0102] As an optional implementation, in one embodiment of the invention, determining the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field includes:

[0103] Step S301: Select multiple nodes on the welding trajectory, and cut a cross section along the thickness direction of the busbar at each node of the welding trajectory to determine the point cloud map of the cross section where the temperature is greater than the melting point of the base material.

[0104] Step S302: Determine the two closest points in the point cloud map along the busbar thickness direction, and use the distance between the two points as the weld penetration depth of the node;

[0105] Step S303: Draw a line along the width direction of the busbar with the weld penetration depth, and take the distance between the two farthest points on the line as the weld penetration width of the node.

[0106] Step S304: Connect the center points of the rectangular frame formed by the weld penetration and weld width of all nodes to obtain the welding trajectory circle. Determine the radius of each node and the central angle of the node circle with the previous node based on the welding trajectory circle.

[0107] As an optional implementation, in one embodiment of the invention, calculating the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes includes:

[0108] Step S401: First, calculate the overcurrent area of ​​a node based on the weld width, radius, and the node central angle with the previous node.

[0109] Step S402: Then sum the overcurrent areas of multiple nodes to obtain the overcurrent area of ​​the welding trajectory.

[0110] As an optional implementation, in one embodiment of the invention, setting the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjusting the welding parameters, repeating steps S20 to S40 until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, and taking the current welding parameters as the optimal welding parameters, includes:

[0111] Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

[0112] This invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements all or part of the steps of the aforementioned busbar welding parameter optimization method.

[0113] The embodiments of the present invention can implement all or part of the aforementioned processes, or they can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various methods described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added to or subtracted according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0114] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0115] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0116] The serial numbers in the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0117] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will 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 program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0118] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A method for optimizing bus welding parameters, characterized in that, Includes the following steps: Step S10: Establish a busbar welding simulation model; Step S20: Simulate the welding trajectory and its temperature field based on the initial welding parameters; Step S30: Determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field. Specifically, select multiple nodes on the welding trajectory and take a cross-section along the busbar thickness direction at each node of the welding trajectory to determine the point cloud map with a temperature greater than the melting point of the base material in the cross-section. Determine the two closest points in the point cloud map along the busbar thickness direction and use the distance between these two points as the weld penetration depth of the node. Then, draw a line along the busbar width direction with the weld penetration depth, and use the distance between the two farthest points on this line as the weld width of the node. Connect the center points of the rectangular frame formed by the weld penetration depth and weld width of all nodes to obtain the welding trajectory circle. Determine the radius of each node and the node central angle with the previous node based on the welding trajectory circle. Step S40: Calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes; Step S50: Set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat steps S20 to S40 until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold. The current welding parameters are then taken as the optimal welding parameters. The calculation of the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes includes: First, calculate the overcurrent area of ​​a node based on the weld width, radius, and central angle with the previous node. Then, use the formula... Calculate the first Overcurrent area of ​​each node Among them, the weld width of the node weld Node radius All units are mm, and the central angle of the node is... The unit is rad; Then, sum the overcurrent areas of multiple nodes to obtain the overcurrent area of ​​the welding trajectory, i.e., according to the formula... Obtain the overcurrent area of ​​the entire welding trajectory. .

2. The busbar welding parameter optimization method according to claim 1, characterized in that, The step of setting the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjusting the welding parameters, and repeating steps S20 to S40 until the overcurrent area of ​​the welding trajectory exceeds a preset area threshold, and taking the current welding parameters as the optimal welding parameters, includes: Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

3. A busbar welding parameter optimization device, characterized in that, include: A modeling unit, used to establish a busbar welding simulation model; The simulation unit is used to simulate the welding trajectory and its temperature field based on the initial welding parameters. The determining unit is used to determine the weld parameters of multiple nodes in the welding trajectory based on the welding trajectory and its temperature field. Specifically, multiple nodes are selected on the welding trajectory, and a cross-section is taken along the thickness direction of the busbar at each node of the welding trajectory. The point cloud map with a temperature greater than the melting point of the base material in the cross-section is determined. The two closest points in the point cloud map are determined along the thickness direction of the busbar, and the distance between the two points is taken as the weld penetration depth of the node. Then, a line is drawn along the width direction of the busbar based on the weld penetration depth, and the distance between the two farthest points on the line is taken as the weld width of the node. The center points of the rectangular frame formed by the weld penetration depth and weld width of all nodes are connected to obtain the welding trajectory circle. The radius of each node and the node central angle with the previous node are determined based on the welding trajectory circle. A calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes. An optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination and calculation process of the simulation unit, the determination unit and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds the preset area, and the current welding parameters are taken as the optimal welding parameters. The calculation unit is used to calculate the overcurrent area of ​​the welding trajectory based on the weld parameters of multiple nodes, including: First, calculate the overcurrent area of ​​a node based on the weld width, radius, and central angle with the previous node. Then, use the formula... Calculate the first Overcurrent area of ​​each node Among them, the weld width of the node weld Node radius All units are mm, and the central angle of the node is... The unit is rad; Then, sum the overcurrent areas of multiple nodes to obtain the overcurrent area of ​​the welding trajectory, i.e., according to the formula... Obtain the overcurrent area of ​​the entire welding trajectory. .

4. The busbar welding parameter optimization device according to claim 3, characterized in that, The optimization unit is used to set the overcurrent area of ​​the welding trajectory as the optimization target, continuously adjust the welding parameters, and repeat the simulation, determination, and calculation processes of the simulation unit, the determination unit, and the calculation unit until the overcurrent area of ​​the welding trajectory exceeds the preset area. The current welding parameters are then taken as the optimal welding parameters, including: Welding power, welding rate, and welding decoking amount are used as welding parameters. The values ​​of each welding parameter are continuously adjusted until the overcurrent area of ​​the welding trajectory exceeds the preset area threshold.

5. A computer device, characterized in that, include: A memory and a processor, wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the bus welding parameter optimization method according to any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the bus welding parameter optimization method according to any one of claims 1 to 2.

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