Welding pressing detection method and device, electronic equipment and storage medium

Abstract

The invention provides a welding compaction detection method and device, electronic equipment and a storage medium, and relates to the technical field of battery modules. The method comprises the steps that based on a to-be-welded battery module, a preset pressing position of the to-be-welded battery module is covered with a pressure detection medium; carrying out simulation welding on the to-be-welded battery module provided with the pressure detection medium; and determining the welding compaction performance of the compaction mechanism on the basis of the pressure detection medium completing the simulated welding. According to the invention, the preset pressing position of the busbar is covered with the pressure detection medium, and the pressing mechanism applies the pressing force consistent with the real working condition, so that the pressing state in the welding environment can be truly reproduced under the condition of not outputting welding energy, and the pressing performance of the pressing mechanism in the welding process can be comprehensively and accurately detected.

Description

Technical Field

[0001] This invention relates to the field of battery module technology, and more specifically, to a welding clamping detection method and apparatus, electronic equipment, and storage medium. Background Technology

[0002] In the production process of power battery modules, the busbar and the cell terminal are usually electrically connected by welding. In order to ensure welding quality and electrical performance, the welding process requires the copper nozzle of the clamping mechanism to press the busbar and the terminal to make them fit together fully. The stability of the clamping effect is directly related to the welding quality, conductivity and the safety and reliability of the module.

[0003] When clamping the electrode plate to the pole, the gap and fit between the copper nozzle and the electrode plate, and other clamping performance indicators, are key factors directly affecting the reliability of the welding quality. These indicators are typically tested using the following methods in relevant technologies: 1. After pressing the copper nozzle tightly against the surface of the busbar, use a feeler gauge to measure the gap between the copper nozzle and the periphery of the busbar; 2. By measuring the flatness of the copper nozzle, the clamping effect can be indirectly inferred, etc. However, the above detection methods have certain limitations, such as insufficient detection accuracy due to the detection range not being able to fully cover the contact surface between the copper nozzle and the clamping plate, and the inability to reflect the actual clamping state during the actual clamping process. Summary of the Invention

[0004] The problem solved by this invention is: how to comprehensively and accurately detect the clamping performance of the clamping mechanism during the welding process.

[0005] To address the above problems, the present invention provides a welding clamping detection method and apparatus, electronic equipment, and storage medium.

[0006] In a first aspect, the present invention provides a method for detecting welding clamping, comprising: Based on the battery module to be welded, a pressure detection medium is placed over a preset pressing position on the battery module to be welded; wherein, the battery module to be welded includes aligned battery cells and a busbar; the preset pressing position is located on the side of the busbar away from the battery cells; Simulated welding is performed on the battery module to be welded, which is equipped with the pressure detection medium; wherein, the simulated welding includes a clamping process without outputting welding energy; the clamping process includes using a clamping mechanism to clamp the pressure detection medium at a preset clamping position so that the busbar is in contact with the battery cell; Based on the pressure detection medium used to complete the simulated welding, the welding clamping performance of the clamping mechanism is determined.

[0007] Optionally, the pressure detection medium is used to generate visual information characterizing the welding clamping performance based on the pressure location and pressure when under pressure.

[0008] Optionally, determining the welding clamping performance of the clamping mechanism based on the pressure detection medium used to complete the simulated welding includes: Based on the visualization information generated by the pressure detection medium used to complete the simulated welding, the welding clamping performance of the clamping mechanism, as characterized by the visualization information, is determined.

[0009] Optionally, the welding clamping detection method further includes placing the pressure detection medium over the preset clamping position of the battery module to be welded, based on the battery module to be welded. Multiple battery cells are stacked to obtain a battery cell stack of the battery module to be welded. The busbar is aligned with the cell stack so that the busbar corresponds to the terminal position of the corresponding cell.

[0010] Optionally, the step of covering the preset clamping position of the battery module to be welded with the pressure detection medium includes: Determine the target area on the battery module to be welded for setting the pressure detection medium; wherein the preset pressing position is located within the target area; The pressure detection medium is placed in the target area to cover the preset pressing position within the target area.

[0011] Optionally, stacking multiple battery cells to obtain the battery cell stack of the battery module to be welded includes: Multiple battery cells are stacked at the stacking station to obtain the battery cell stack, and the first position information of the terminal of each battery cell in the battery cell stack is obtained. The simulated welding of the battery module to be welded, which is equipped with the pressure detection medium, includes: The battery module to be welded, equipped with the pressure detection medium, is transferred to the welding station corresponding to the welding device; wherein, the welding device includes the clamping mechanism and the welding mechanism; The first position information is converted into target motion coordinate information for the clamping mechanism, and the clamping mechanism is controlled to clamp the pressure detection medium at the preset clamping position based on the target motion coordinate information.

[0012] Optionally, converting the first position information into target motion coordinate information of the clamping mechanism includes: Based on the first position information and the relative positional relationship between the stacking station and the welding station, the second position information of the electrode of each cell in the cell stack at the welding station is determined. Based on the second position information and the third position information of the terminal post of each cell in the cell stack of the standard battery module at the welding station, the position offset is determined; wherein, the position offset is the position of the terminal post of each cell in the cell stack of the battery module to be welded, relative to the position of the corresponding terminal post in the standard battery module. Based on the position offset, the standard motion coordinate information of the standard battery module corresponding to the clamping mechanism is offset compensated to determine the target motion coordinate information of the clamping mechanism corresponding to the preset clamping position; wherein, the standard motion coordinate information is determined according to the standard clamping position of the standard battery module and the motion coordinate system constructed based on the welding device.

[0013] In a second aspect, the present invention provides a welding clamping detection device, comprising: A medium assembly control module is used to cover and set a pressure detection medium on a preset pressing position of the battery module to be welded, based on the battery module to be welded; wherein the battery module to be welded includes aligned cells and a busbar; the preset pressing position is located on the side of the busbar away from the cell; A simulated welding control module is used to simulate welding of the battery module to be welded, which is equipped with the pressure detection medium; wherein, the simulated welding includes a clamping process without outputting welding energy; the clamping process includes using a clamping mechanism to clamp the pressure detection medium at a preset clamping position so that the busbar is in contact with the battery cell; The clamping performance calculation module determines the welding clamping performance of the clamping mechanism based on the pressure detection medium used to complete the simulated welding.

[0014] Thirdly, the present invention provides an electronic device, including a memory and a processor; The memory is used to store computer programs; The processor is configured to implement the welding clamping detection method as described in the first aspect when executing the computer program.

[0015] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that is read and executed by a processor to implement the welding clamping detection method as described in the first aspect.

[0016] The beneficial effects of the welding clamping detection method, device, electronic equipment, and storage medium of the present invention are as follows: The present invention can realistically reproduce the clamping state in the welding environment, and achieve comprehensive and accurate detection of the actual clamping effect of the clamping mechanism on the battery module to be welded. Specifically, by covering and setting the pressure detection medium at the preset clamping position of the busbar, and applying a clamping force consistent with the actual welding process by the clamping mechanism without outputting welding energy, a clamping result highly consistent with the actual working condition can be obtained without changing the normal welding logic. With the help of the pressure detection medium, the clamping result (such as the magnitude, distribution, and uniformity of the clamping force) can be intuitively and comprehensively reflected, thereby comprehensively and accurately detecting whether the clamping is uniformly in place and whether there are abnormalities such as false pressure, biased pressure, or overpressure. Thus, the detection range of this invention completely covers the contact surface between the clamping mechanism and the busbar, and can truly reflect the clamping state during the actual clamping process. This allows for comprehensive and accurate detection of the welding clamping performance of the clamping mechanism during welding, ensuring high precision and reliability of the detection results. Furthermore, it enables rapid verification of the clamping effect and early warning of anomalies before welding, avoiding welding defects such as incomplete welds and misaligned welds, thereby significantly improving welding quality (such as weld point formation quality) and the stability of the corresponding electrical connections. In addition, this invention has the advantages of simple operation, intuitive results, strong adaptability, and easy integration into automated production lines. Attached Figure Description

[0017] Figure 1 This is a schematic flowchart of a welding clamping detection method in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure in an embodiment of the present invention, showing the pressure detection medium disposed on the battery module to be welded; Figure 3 This is a schematic diagram of the pressing mechanism, pressure detection medium, and battery module to be welded in an embodiment of the present invention; Figure 4 This is a structural block diagram of the welding clamping detection device in an embodiment of the present invention; Figure 5 This is a schematic diagram of the communication connection between the memory and processor of an electronic device in an embodiment of the present invention.

[0018] Figure label: 1. Battery module to be welded; 11. Battery cell; 111. Terminal post; 12. Busbar; 2. Pressure detection medium; 3. Clamping mechanism; 31. Copper nozzle. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0021] Combination Figure 1-3 As shown, an embodiment of the present invention provides a welding clamping detection method, including: Step 100: Based on the battery module 1 to be welded, the pressure detection medium 2 is placed on the preset pressing position of the battery module 1 to be welded; wherein, the battery module 1 to be welded includes the aligned battery cell 11 and busbar 12; the preset pressing position is located on the side of the busbar 12 away from the battery cell 11.

[0022] In the battery module production process, for a battery module (denoted as battery module 1 to be welded) that has completed the stacking of battery cells 11 and the alignment of busbars 12, the next step is to weld, that is, to weld the terminals 111 of the battery cells 11 to the corresponding busbars 12 using a welding device. The welding device includes a clamping mechanism 3 and a welding mechanism. The clamping mechanism 3 is used to clamp the busbars 12 and the battery cells 11 (or terminals 111) during the welding process to ensure that the surfaces of the two are fully in contact and to avoid incomplete or misaligned welds. The welding mechanism outputs welding energy (such as laser energy or current) under the clamping state to achieve a firm connection between the busbars 12 and the terminals 111 of the battery cells 11. In this way, the synergistic effect of clamping and welding ensures the quality of the weld formation and the reliability of the electrical connection. Based on this, the method of this embodiment is used to test the clamping performance (denoted as welding clamping performance) of the clamping mechanism 3 acting on the battery module 1 to be welded, so as to provide verification basis and quality assurance for the subsequent welding process of the battery module 1 to be welded or the operating status of the clamping mechanism 3, and to ensure the quality of welding of the battery module 1 to be welded by the welding device and the stability and reliability of the electrical connection between the cell 11 and the busbar 12.

[0023] In step 100, the pressure detection medium 2 is placed over the preset pressing position of the battery module 1 to be welded. Specifically, the battery module 1 to be welded includes a battery cell 11 and a busbar 12 that have been aligned (e.g., the corresponding busbar 12 and the corresponding terminal post 111 of the battery cell 11 are positioned correspondingly, and the position between the busbar 12 and the terminal post 111 of the battery cell 11 is fixed by a corresponding tooling). During the welding process, the welding device applies a clamping action from the corresponding position on the side of the busbar 12 away from the cell 11 (or the terminal post 111) through the clamping mechanism 3, so that the busbar 12 and the cell 11 tend to press against each other. Therefore, a pressure detection medium 2 is set on the side of the busbar 12 away from the cell 11 (which is also the side of the busbar 12 facing the welding device) at the preset clamping position (i.e. the position where the clamping mechanism 3 applies a clamping force to the busbar 12). The pressure detection medium 2 produces a visual change after being pressed, such as an indentation or color development, to characterize and record the welding clamping performance of the clamping mechanism 3. The pressure detection medium 2 covers the preset clamping position of the battery module 1 to be welded, so that the pressure detection medium 2 can fully cover the actual force position of the busbar 12, thereby generating a direct, accurate and comprehensive response to the clamping action of the clamping mechanism 3, and accurately reflecting the welding clamping performance.

[0024] Step 200: Simulate welding of the battery module 1 to be welded with pressure detection medium 2; wherein, the simulated welding includes a pressing process without outputting welding energy; the pressing process includes pressing the pressure detection medium 2 with pressing mechanism 3 at a preset pressing position so that the busbar 12 is in contact with the cell 11.

[0025] Specifically, in step 200, based on the battery module 1 to be welded with pressure detection medium 2 obtained in step 100, a simulated welding (process) is performed on it. The simulated welding includes a clamping process without outputting welding energy, i.e., simulating the clamping process in a real welding process. For example, the copper nozzle 31 of the clamping mechanism 3 is driven to contact the pressure detection medium 2, and a clamping force consistent with the real welding process is applied to the busbar 12, allowing the busbar 12 and the cell 11 to be (or tend to be) in close contact, but without welding (i.e., no welding energy is output). This reproduces the clamping state in a real welding environment without changing the normal welding logic, ensuring the consistency of the test results with actual working conditions, thereby ensuring the representativeness and reliability of the welding clamping performance test. Furthermore, it avoids interference from welding heat or spatter on the pressure detection medium 2, ensuring that the detection medium only reflects the welding clamping performance itself, thus improving the authenticity and reliability of the welding clamping test.

[0026] Step 300: Based on the pressure detection medium 2 that completes the simulated welding, determine the welding clamping performance of the clamping mechanism 3.

[0027] Specifically, based on the pressure testing medium 2 that has undergone simulated welding in step 200, the welding clamping performance of the clamping mechanism 3 is determined. For example, the visualization results (such as indentation morphology or color distribution) formed by the pressure testing medium 2 after being pressurized are obtained and observed or image-acquired. Based on the morphological characteristics of the visualization results, such as the integrity, depth, uniformity, and overlap with the preset clamping position of the indentation, the clamping performance of the clamping mechanism 3 during the welding process is determined (i.e., welding clamping performance, such as the magnitude, distribution, or uniformity of the clamping force). For example, if a continuous and uniform indentation area is formed on the pressure testing medium 2, the welding clamping performance is considered good; if the indentation is incomplete, offset, too shallow, or partially missing, it is considered that there are abnormalities such as insufficient clamping, bias pressure, or overpressure. In some embodiments, the determined welding clamping performance can also serve as a basis for optimizing or maintaining the welding device. That is, it is determined whether the welding clamping performance meets the welding process requirements. If it does, the welding device can be used normally. If it does not, the clamping mechanism 3 or related components are adjusted or calibrated, such as replacing or repairing the end face of the copper nozzle 31, recalibrating the clamping position, or correcting the clamping force parameters, in order to restore the welding clamping performance that meets the welding process requirements, thereby ensuring the subsequent welding quality, avoiding defects such as incomplete welding, off-center welding, or weld point failure, and improving the stability and economy of the corresponding production process.

[0028] In summary, the method of this embodiment can realistically reproduce the clamping state in the welding environment, achieving comprehensive and accurate detection of the actual clamping effect of the clamping mechanism 3 on the battery module 1 to be welded. Specifically, by covering and setting the pressure detection medium 2 at the preset clamping position of the busbar 12, and applying a clamping force consistent with the actual welding process by the clamping mechanism 3 without outputting welding energy, a clamping result highly consistent with the actual working conditions can be obtained without changing the normal welding logic. With the help of the pressure detection medium 2, the clamping result (such as the magnitude, distribution, and uniformity of the clamping force) can be intuitively and comprehensively reflected, thereby comprehensively and accurately detecting whether the clamping is uniformly in place and whether there are abnormalities such as false pressure, biased pressure, or overpressure. Thus, the detection range of the method in this embodiment completely covers the contact surface between the clamping mechanism 3 and the busbar 12, and can truly reflect the clamping state during the actual clamping process. This allows for comprehensive and accurate detection of the welding clamping performance of the clamping mechanism 3 during the welding process, ensuring high precision and reliability of the detection results. Furthermore, it enables rapid verification of the clamping effect and abnormal warning before welding, avoiding welding defects such as incomplete welds and misaligned welds, thereby significantly improving welding quality (such as weld point formation quality) and the stability of the corresponding electrical connections. In addition, the method in this embodiment has the advantages of simple operation, intuitive results, strong adaptability, and easy integration into automated production lines.

[0029] Optionally, the pressure detection medium 2 is used to generate visual information characterizing the welding clamping performance based on the pressure location and pressure when under pressure.

[0030] Specifically, the pressure detection medium 2 is used to generate visual information characterizing the welding clamping performance based on the pressure position and pressure when under pressure, so as to intuitively analyze and identify the force distribution at the preset clamping position on the busbar 12, and determine whether there are problems such as clamping offset, local insufficient clamping or overpressure in the clamping mechanism 3, thereby accurately determining the current welding clamping performance of the clamping mechanism 3.

[0031] For example, the pressure detection medium 2 can be a developing paper (pressure-sensitive paper), which includes a substrate layer, a pressure-sensitive coating containing microcapsule colorant, and a color-developing layer (or a coating that reacts with the colorant). When the welding clamping mechanism 3 applies pressure to the developing paper during the simulated welding process, the microcapsules in the pressure-sensitive coating rupture in the pressure area and release the colorant. The colorant reacts chemically with the color-developing layer to form a color change. Thus, the color pattern of the pressure area corresponds to the actual stress position, and the depth of color reflects the pressure exerted on that area, serving as visual information characterizing the welding clamping performance. By visually observing the color distribution and depth of color on the developing paper, it is possible to quickly identify whether the clamping covers the preset clamping position and determine whether there are problems such as clamping deviation, insufficient local clamping, or overpressure. The developing paper can be set with different sensitivity levels according to actual needs, such as low-pressure, medium-pressure, or high-pressure types. Its sensitivity range can be preset according to needs to adapt to different welding process conditions, thereby ensuring accurate pressure detection results under different welding conditions. In some embodiments, an image acquisition device (or visual recognition device) can be used to digitize the color pattern, and image processing algorithms can be used to quantitatively analyze parameters such as color gradient and area distribution to generate a clamping force distribution map or numerical index, thereby achieving an objective and refined evaluation of welding clamping performance. Alternatively, the pressure detection medium 2 can also be indented paper (such as paper or film made of a corresponding pressure-sensitive material), which will form indentations at the pressure location. The shape of the indentation reflects the force distribution and magnitude. For example, the depth, continuity, and integrity of the indentation can be used to judge the welding clamping performance of the clamping mechanism 3, such as the clamping uniformity.

[0032] Therefore, compared to using feeler gauges or corresponding sensors to detect single-point (or local) clamping states, the method in this embodiment, by covering the preset clamping position of the busbar 12 with pressure detection medium 2, can generate continuous and intuitive visual representation results across the entire stress area. This not only reflects the overall stress distribution at the preset clamping position but also simultaneously identifies problems such as clamping deviation, insufficient local clamping, or overpressure, thus avoiding the limitation of single-point detection methods in detecting global stress anomalies. Furthermore, the pressure detection medium 2 can be used in conjunction with simulated welding processes to obtain stress distribution results and clamping performance characterizations highly consistent with actual welding conditions, thereby ensuring the reliability and representativeness of the detection results and improving the authenticity and accuracy of welding clamping performance evaluation.

[0033] Optionally, the thickness of the pressure detection medium 2 is less than or equal to a preset threshold.

[0034] Specifically, to avoid interference with the welding clamping effect of the pressure detection medium 2, the pressure detection medium 2 is flexible in shape and has a uniform thickness, and its thickness is limited to less than or equal to a preset threshold. Therefore, when it covers the preset clamping position of the manifold 12, it will not (significantly) affect the contact and force transmission between the clamping mechanism 3 and the manifold 12. Thus, the detected pressure position and pressure magnitude can accurately reflect the actual welding conditions, avoiding false deviations caused by uneven shape or thickness of the pressure detection medium 2 itself. In some embodiments, the preset threshold can be set according to different process requirements, such as 0.5mm, 0.3mm, or 0.1mm, to balance medium strength and detection sensitivity, ensuring the normal and smooth use of the pressure detection medium 2 while guaranteeing the authenticity and accuracy of the force distribution at the displayed preset clamping position.

[0035] Optionally, step 300 includes: Based on the visualization information generated by the pressure detection medium 2 that completes the simulated welding, the welding clamping performance of the clamping mechanism 3 as represented by the visualization information is determined.

[0036] Specifically, in step 300, based on the visualization information generated by the pressure detection medium 2 after the simulated welding, the welding clamping performance of the clamping mechanism 3, as represented by this visualization information, is analyzed and identified. This identifies the corresponding pressure positions and the magnitude of the pressure at each pressure position, and determines the force distribution of the manifold 12 at the preset clamping position. This determines the welding clamping performance of the clamping mechanism 3, providing a reliable basis for the continued use, subsequent optimization, and maintenance of the clamping mechanism 3 and the welding device. It ensures that the clamping mechanism 3 can maintain a stable, uniform, and process-compliant clamping effect in subsequent welding operations. This not only helps avoid quality hazards such as incomplete welds and misaligned welds caused by clamping performance degradation, but also enables condition monitoring and process closed-loop optimization within the service life of the relevant equipment, thereby improving welding quality consistency and long-term reliability of the production process.

[0037] The welding clamping performance can be a quantitative indicator, such as numerical parameters (e.g., position coordinates, pressure magnitude) corresponding to the pressure points and the pressure magnitude at each pressure point, or as a pressure distribution curve, two-dimensional or three-dimensional distribution map. Alternatively, the welding clamping performance can be a qualitative indicator, such as using good conditions and abnormal conditions (including clamping deviation, local insufficient clamping or over-pressure, etc.) to classify or categorize the clamping effect, so that operators can intuitively identify whether the welding clamping performance meets the process requirements. In some embodiments, the above-mentioned qualitative indicators can be obtained by manual observation or automatic identification of the color distribution (or indentation morphology) of the visualized information, and classified and output in combination with preset judgment rules. For example, a condition with uniform color and complete coverage is judged as a good condition, while a condition with discontinuous color, local lightness or darkness is judged as an abnormal condition, or the abnormal condition can be further subdivided. In this way, intuitive judgment and quantitative analysis are complemented, improving the comprehensiveness and reliability of the welding clamping performance evaluation. Alternatively, both quantitative and qualitative indicators can be used to characterize welding clamping performance. By combining quantitative and qualitative indicators, we can not only achieve intuitive identification of clamping performance, but also form data support for process optimization and equipment calibration, thereby ensuring the comprehensiveness and reliability of welding clamping performance evaluation.

[0038] For example, when determining the welding clamping performance of the clamping mechanism 3 as represented by the visualized information, it can be achieved through manual observation. For instance, the colored area or indentation morphology formed by the pressure detection medium 2 can be observed manually and compared with color charts, standard spectra, or preset qualified samples to determine the welding clamping performance of the clamping mechanism 3 as represented by the visualized information. Alternatively, the visualized information can be converted into numerical indicators for automatic identification and analysis. For example, an image acquisition device (or visual recognition device) can be used to acquire the color distribution or indentation image, and image processing algorithms can be used to extract feature parameters such as color depth, coverage area, morphological uniformity, and boundary integrity. These parameters can then be compared with preset thresholds or standard models to automatically determine the welding clamping performance of the clamping mechanism 3 as represented by the visualized information. In some embodiments, machine learning or deep learning models can be used to train a large number of historical detection results to achieve intelligent identification and classification of clamping performance under different visualization modes, thereby further improving the accuracy, objectivity, and efficiency of automatic identification and detection.

[0039] Optionally, prior to step 100, the welding clamping test method further includes: Multiple battery cells 11 are stacked to obtain a battery cell stack body for the battery module 1 to be welded.

[0040] Specifically, to ensure the accuracy and authenticity of the monitoring results, the battery module 1 to be welded must be consistent with the battery module used for welding in the actual production process in terms of structural form, stacking method, and busbar 12 configuration. In other words, the number, specifications, terminal post 111 arrangement, and stacking order of the battery cells 11 in the battery module 1 to be welded should all match the actual production conditions. The structural dimensions, location, and alignment of the busbar 12 with the terminals 111 of the battery cells should also be consistent. Therefore, before step 100, multiple battery cells 11 are stacked, such as by stacking the required number of cells 11 according to a preset arrangement, to form a cell stack with a certain structural stability. This stack serves as a component of the battery module 1 to be welded, facilitating subsequent alignment of the busbar 12 and simulated welding operations.

[0041] Align the busbar 12 with the battery cell stack so that the busbar 12 corresponds to the terminal post 111 of the corresponding battery cell 11.

[0042] Specifically, based on the battery cell stack, according to the preset battery cell 11 electrical connection method (such as series and / or parallel connection), the required busbar 12 specifications (size), quantity, setting position and other setting parameters are determined, and on this basis, the corresponding busbar 12 is selected (or processed) to obtain the required busbar 12 for alignment with the battery cell stack. Busbar 12 is installed on the cell stack according to the set parameters (e.g., the position between busbar 12 and cell 11 is fixed by using appropriate tooling), so that the corresponding busbar 12 is installed in accordance with the position of the corresponding cell 11's terminal post 111, so as to achieve precise alignment between cell 11 (or cell stack, cell 11's terminal post 111) and busbar 12, resulting in a battery module 1 to be welded that conforms to the actual production process. This ensures that the stress points in the subsequent simulated welding process are consistent with the actual welding conditions, and ensures that the detected stress distribution can truly reflect the subsequent actual welding conditions, avoiding detection deviations caused by using simplified or substitute samples, and ensuring the accuracy and applicability of the test results.

[0043] Optionally, combined Figure 2 , Figure 3 As shown, step 100 includes: Determine the target area on the battery module 1 to be welded for setting the pressure detection medium 2; wherein the preset clamping position is located within the target area; The pressure detection medium 2 is placed in the target area to cover the preset pressing position within the target area.

[0044] Specifically, to improve the ease of setting up the pressure detection medium 2 and ensure that the pressure detection medium 2 can accurately cover the preset clamping position of the manifold 12, it is preferable to select a pressure detection medium 2 with an area larger than the area of ​​the preset clamping position, so as to have a certain margin during installation, reduce the requirements for setting position accuracy, and improve setting efficiency. The preset clamping position can be determined based on the welding method (such as laser welding, resistance welding, or ultrasonic welding) and the structure of the manifold 12 (such as having or not having pole holes). For example, in laser welding, the preset clamping position is located in the area around the weld point, while in resistance welding or ultrasonic welding, the preset clamping position basically coincides with the weld point position. For manifolds 12 without pole holes, the preset clamping position can be determined based on the overlapping area between the manifold 12 and the pole 111. Based on the above considerations, in step 100, the target area for setting the pressure detection medium 2 on the battery module 1 to be welded can be determined according to the number and position of the terminals 111 and busbars 12 of the battery cells 11 that need to be welded and pressed for testing. For example, a target area covering all preset pressing positions of the busbars 12 that need to be welded and pressed for testing can be determined, and the pressure detection medium 2 can be placed in this target area (e.g., by pasting or clamping) so that it can cover (at least one) preset pressing position in the target area, such as simultaneously covering all preset pressing positions that need to be welded and pressed for testing. In this way, it can be ensured that the actual pressing position (test position) is equipped with the pressure detection medium 2 for welding and pressing for testing, which significantly improves the accuracy and efficiency of testing.

[0045] Optionally, multiple battery cells 11 are stacked to obtain a battery cell stack body for the battery module 1 to be welded, including: Multiple cells 11 are stacked at the stacking station to obtain a cell stack, and the first position information of the terminal post 111 of each cell 11 in the cell stack is obtained.

[0046] Specifically, during the process of stacking multiple battery cells 11 to form a battery cell stack for welding the battery module 1, the multiple battery cells 11 are stacked in a preset order at the stacking station, and the relative positions of the battery cells 11 are limited by corresponding positioning fixtures, thereby obtaining a neatly arranged and stably positioned battery cell stack. After stacking is completed, a visual recognition device (such as a CCD camera, industrial camera, etc.) can be used to acquire and process images of the battery cell stack, extracting the actual spatial coordinate information of the terminals 111 of each battery cell 11 in the battery cell stack (such as the coordinates of the center point of the terminal 111 in the corresponding coordinate system), as the first position information, providing data support for subsequent accurate simulated welding. By stacking cells at the stacking station, on the one hand, sufficient space and a reasonable assembly environment are provided for the stacking of cells 11, making it easier for operators or automated equipment to perform the stacking operation of cells 11 smoothly and avoiding subsequent welding deviations caused by poor stacking; on the other hand, it is convenient to obtain the corresponding position coordinate information based on a stable coordinate system and realize the position coordinate information conversion (described later), so that the actual position of the collected electrode post 111 can be accurately mapped to the coordinate system corresponding to the welding device, avoiding the cumulative error caused by transfer or station switching, and ensuring that the execution path of the clamping mechanism 3 is consistent with the actual position of the electrode post 111 of the cell 11, thereby improving the accuracy and reliability of welding clamping detection.

[0047] Step 200 includes: The battery module 1 to be welded, equipped with pressure detection medium 2, is transferred to the welding station corresponding to the welding device; wherein, the welding device includes a clamping mechanism 3 and a welding mechanism; The first position information is converted into target motion coordinate information for the clamping mechanism 3, and the clamping mechanism 3 is controlled to clamp the pressure detection medium 2 at the preset clamping position based on the target motion coordinate information.

[0048] Specifically, in step 200, the battery module 1 to be welded, equipped with the pressure detection medium 2, is transferred to the corresponding welding station of the welding device via a conveying device or a robotic arm. This facilitates subsequent simulated welding using the welding device to replicate the compression state in a real welding environment, ensuring the consistency of the test results with actual working conditions, thereby ensuring the representativeness and reliability of the welding compression performance test. The welding device includes a compression mechanism 3 and a welding mechanism. The end of the compression mechanism 3 may be equipped with a copper nozzle 31 or other compression head for compressing the busbar 12 and the terminal post 111 of the cell 11 during the welding process. In some embodiments, the welding device uses laser welding, and the compression mechanism 3 and the welding mechanism can be set independently. In other embodiments, the welding device uses resistance welding (or ultrasonic welding), and the welding electrode (or ultrasonic transducer) of the welding mechanism and the compression head can be integrated to simultaneously achieve compression and energy input.

[0049] For the battery module 1 to be welded, equipped with pressure detection medium 2, which is transferred to the welding station, the first position information (such as the actual spatial coordinates of the terminals 111 of each cell 11) obtained at the stacking station is imported into the control system of the welding device. The first position information is then converted into motion coordinate information (denoted as target motion coordinate information) in the motion coordinate system of the pressing mechanism 3 through a coordinate transformation algorithm. Based on the target motion coordinate information, the pressing mechanism 3 is driven to move its pressing head along a predetermined path to a preset pressing position and press the pressure detection medium 2 at that position so that the busbar 12 is in contact with the cell 11. During this process, the pressing mechanism 3 applies a pressing force consistent with the actual welding process, pressing the busbar 12 against the terminals 111 of the cell 11. This causes the pressure detection medium 2 to change color or deform during the pressing process, thus visually reflecting the pressing effect. In this way, the operating position of the clamping mechanism 3 can be kept consistent with the actual position of the terminal post 111 of the cell 11, avoiding deviations caused by the transfer of the battery module 1 to be welded, ensuring that the clamping process of the simulated welding is highly consistent with the real welding environment, and providing accurate data support for the subsequent determination of clamping performance.

[0050] Optionally, the stacking station and the welding station can be set up at different locations on the same production line so that the battery module can be transferred to the welding station for subsequent operations after the battery cells 11 are stacked, thereby realizing segmented processing and improving the overall cycle time and efficiency of the production line. In some embodiments, the welding station and welding equipment can be set up in a welding room set up on the production line to ensure that the energy release (such as laser, heat or ultrasonic vibration) during the welding process is carried out in a controlled environment, while improving the safety of the production process and the stability of the welding operation.

[0051] Optionally, converting the first position information into target motion coordinate information of the clamping mechanism 3 includes: Based on the first position information and the relative positional relationship between the stacking station and the welding station, the second position information of the terminal post 111 of each cell 11 in the cell stack is determined at the welding station.

[0052] Specifically, based on the first position information obtained at the stacking station and the relative positional relationship between the stacking station and the welding station, the actual coordinates of the terminals 111 of each battery cell 11 in the battery cell stack are transformed from the workpiece coordinate system of the stacking station to the workpiece coordinate system of the welding station, thereby obtaining the second position information of the terminals 111 of the battery cell 11 at the welding station. For example, workpiece coordinate systems are established in advance at the stacking station and the welding station respectively, and the coordinate transformation relationship between the two is obtained through a calibration process, for example, by determining the translation vector and rotation matrix through calibration blocks, positioning fixtures or visual markers. Based on this, the first position information of the terminals 111 of the battery cell 11 obtained at the stacking station (such as the coordinates of the center point of the terminal 111 in the workpiece coordinate system of the stacking station) is transformed to the workpiece coordinate system of the welding station to obtain the corresponding center point coordinates of the terminal 111, and further mapped to the motion coordinate system where the clamping mechanism 3 is located, thereby obtaining the second position information. This ensures that the position information collected at the cell 11 stacking station remains valid at the welding station, avoiding clamping position errors caused by station switching or transfer.

[0053] Based on the second position information and the third position information of the terminal post 111 of each cell 11 in the cell stack of the standard battery module at the welding station, the position offset is determined; wherein, the position offset is the position of the terminal post 111 of each cell 11 in the cell stack of the battery module 1 to be welded, relative to the position of the corresponding terminal post 111 in the standard battery module.

[0054] Specifically, considering factors such as processing tolerances and assembly tolerances, the position of the terminal post 111 of the actual battery cell 11 may differ (or deviate) from the position of the terminal post 111 of the battery cell 11 in the standard battery module (which is a battery module template with a stable structure and standard size parameters verified during the production process, and subsequent assembly of the same type of battery module is based on this template). In order to improve production efficiency and reduce the amount of repetitive calibration work, the standard motion trajectory or standard clamping position of the clamping mechanism 3 can be set in advance according to the standard battery module. If there is a deviation later, fine-tuning can be made on the basis of the pre-set standard motion trajectory or standard clamping position to achieve compensation control of the actual battery module 1 to be welded.

[0055] Based on the above considerations and settings, to ensure that the clamping mechanism 3 can accurately align with the preset clamping position when used with different battery modules (of the same model), it is necessary to calculate the offset of the terminal post 111 position of the same cell 11 (denoted as the position offset) based on the second position information and the third position information of the terminal post 111 of each cell 11 in the cell stack of the standard battery module at the welding station. Furthermore, since the preset clamping position can be determined based on the position of the terminal post 111, this position offset can also be used as the offset of the preset clamping position relative to the standard clamping position (i.e., the clamping point corresponding to the terminal post 111 of the standard battery module at the welding station). Thus, based on the second and third position information, and using a preset calculation model, the position offset of the preset clamping position corresponding to the terminal post 111 of the corresponding cell 11 relative to the standard clamping position corresponding to the terminal post 111 of that cell 11 can be determined for subsequent offset compensation.

[0056] For example, the above calculation model can adopt a coordinate difference model, that is, by comparing the second position information of the battery module 1 to be welded. Third position information compared to standard battery modules Calculate the difference along each coordinate axis. , , The position offset is obtained. In some embodiments, the calculation model may also employ an attitude difference model to calculate the difference in attitude between the two, for example, by representing the rotation difference about each coordinate axis using Euler angles or quaternions.

[0057] Based on the position offset, the standard motion coordinate information of the standard battery module corresponding to the clamping mechanism 3 is offset compensated to determine the target motion coordinate information of the clamping mechanism 3 corresponding to the preset clamping position; wherein, the standard motion coordinate information is determined according to the standard clamping position corresponding to the standard battery module and the motion coordinate system constructed based on the welding device.

[0058] Specifically, based on the aforementioned position offset, the standard motion coordinate information of the standard battery module corresponding to the clamping mechanism 3 (which can be determined based on the standard clamping position of the standard battery module and the motion coordinate system constructed based on the welding device, such as the position coordinate information of the standard clamping position of the standard battery module in the motion coordinate system constructed based on the welding device) can be offset and compensated. This will determine the target motion coordinate information of the clamping mechanism 3 corresponding to the preset clamping position (such as the position coordinate information of the preset clamping position in the motion coordinate system constructed based on the welding device), which will be used to guide the motion control and path planning of the clamping mechanism 3. For example, based on the target motion coordinate information, the motion trajectory of the clamping mechanism 3 originally used to perform clamping action at the standard clamping position of the standard battery module can be corrected to ensure that the end actuator (such as the copper nozzle 31) of the clamping mechanism 3 can move accurately to the actual preset clamping position of the battery module 1 to be welded and perform the clamping action. In this way, without changing the existing production process and standard battery module settings, it can automatically adapt to battery modules of different batches or different assembly errors, ensuring the accuracy and consistency of the clamping action, avoiding insufficient clamping, bias or over-clamping caused by position deviation, thereby ensuring the representativeness and reliability of the clamping test results, and further improving the forming quality of subsequent welding processes and the stability of electrical connections.

[0059] For example, based on the aforementioned position offset, the standard motion coordinate information of the clamping mechanism 3 corresponding to the standard clamping position of the standard battery module can be offset and compensated. For instance, offsets ΔX, ΔY, and ΔZ are added to the original standard motion coordinate information (Xs, Ys, Zs) to obtain the target motion coordinate information (Xs+ΔX, Ys+ΔY, Zs+ΔZ) of the clamping mechanism 3 corresponding to the preset clamping position of the battery module 1 to be welded. In some embodiments, if the position offset further includes an attitude difference (such as a rotation angle difference), corresponding angle compensation can also be added to the target motion coordinate information to achieve synchronous correction of position and attitude.

[0060] Optionally, the busbar 12 is provided with a pole hole for receiving the pole 111.

[0061] Specifically, the busbar 12 is provided with terminal hole for accommodating the terminal 111. When the busbar 12 is aligned with the terminal 111 of the battery cell 11, the terminal hole can guide and limit the alignment, allowing the terminal 111 of the battery cell 11 to be smoothly inserted into the corresponding terminal hole during assembly, achieving automatic alignment and stable positioning. This ensures the alignment accuracy of the busbar 12 and the battery cell 11, improves the convenience of alignment between the busbar 12 and the terminal 111 of the battery cell 11, and enhances the stability of the relative position between the busbar 12 and the battery cell 11. One terminal hole can correspond to one terminal 111, meaning one terminal hole is used to accommodate one terminal 111. In some embodiments, the terminal hole can also be designed as an elongated hole or an irregularly shaped hole to accommodate multiple terminals 111 simultaneously, thereby adapting to corresponding electrical connection requirements.

[0062] Combination Figure 4 As shown, another embodiment of the present invention provides a welding clamping detection device, comprising: The medium assembly control module is used to cover and set the pressure detection medium 2 on the preset pressing position of the battery module 1 to be welded, based on the battery module 1 to be welded; wherein, the battery module 1 to be welded includes the aligned battery cell 11 and busbar 12; the preset pressing position is located on the side of the busbar 12 away from the battery cell 11. The simulated welding control module is used to simulate welding of the battery module 1 to be welded, which is equipped with a pressure detection medium 2; wherein, the simulated welding includes a clamping process without outputting welding energy; the clamping process includes using a clamping mechanism 3 to clamp the pressure detection medium 2 at a preset clamping position so that the busbar 12 is in contact with the cell 11. The clamping performance calculation module determines the welding clamping performance of the clamping mechanism 3 based on the pressure detection medium 2 after the simulated welding is completed.

[0063] The welding clamping detection device of this embodiment is used to implement the above-mentioned welding clamping detection method. Its advantages over the prior art are the same as those of the above-mentioned welding clamping detection method over the prior art, and will not be repeated here.

[0064] Combination Figure 5 As shown, another embodiment of the present invention provides an electronic device, including a memory 501 and a processor 502; Memory 501 is used to store computer programs; Processor 502 is used to implement the above welding clamping detection method when executing a computer program.

[0065] Alternatively, an electronic device includes a memory 501 and a processor 502 coupled to the memory 501; the memory 501 is configured to store a computer program; the processor 502 is configured to perform the following operations when the computer program is executed: Based on the battery module 1 to be welded, the pressure detection medium 2 is placed on the preset pressing position of the battery module 1 to be welded; wherein, the battery module 1 to be welded includes the aligned battery cell 11 and busbar 12; the preset pressing position is located on the side of the busbar 12 away from the battery cell 11. Simulated welding is performed on the battery module 1 to be welded, which is equipped with pressure detection medium 2; wherein, simulated welding includes a pressing process without outputting welding energy; the pressing process includes pressing the pressure detection medium 2 at a preset pressing position using a pressing mechanism 3 so that the busbar 12 is in contact with the battery cell 11; Based on the pressure detection medium 2 used to complete the simulated welding, the welding clamping performance of the clamping mechanism 3 is determined.

[0066] The electronic device in this embodiment can be used to implement the above-described welding clamping detection method. Its advantages over the prior art are the same as those of the above-described welding clamping detection method over the prior art, and will not be repeated here.

[0067] Another embodiment of the present invention provides a computer-readable storage medium storing a computer program, which is read and executed by a processor to implement the above-described welding clamping detection method.

[0068] Alternatively, a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the following operations: Based on the battery module 1 to be welded, the pressure detection medium 2 is placed on the preset pressing position of the battery module 1 to be welded; wherein, the battery module 1 to be welded includes the aligned battery cell 11 and busbar 12; the preset pressing position is located on the side of the busbar 12 away from the battery cell 11. Simulated welding is performed on the battery module 1 to be welded, which is equipped with pressure detection medium 2; wherein, simulated welding includes a pressing process without outputting welding energy; the pressing process includes pressing the pressure detection medium 2 at a preset pressing position using a pressing mechanism 3 so that the busbar 12 is in contact with the battery cell 11; Based on the pressure detection medium 2 used to complete the simulated welding, the welding clamping performance of the clamping mechanism 3 is determined.

[0069] The technical solutions of the embodiments of the present invention, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of the embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, external hard drives, ROM, RAM, magnetic disks, or optical disks.

[0070] The computer-readable storage medium of this embodiment can be used to implement the above-described welding clamping detection method. Its advantages over the prior art are the same as those of the above-described welding clamping detection method over the prior art, and will not be repeated here.

[0071] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A method for detecting welding clamping, characterized in that, include: Based on the battery module (1) to be welded, a pressure detection medium (2) is placed over the preset pressing position of the battery module (1) to be welded; wherein, the battery module (1) to be welded includes a cell (11) and a busbar (12) that have been aligned; the preset pressing position is located on the side of the busbar (12) away from the cell (11); Simulated welding is performed on the battery module (1) to be welded, which is equipped with the pressure detection medium (2); wherein, the simulated welding includes a pressing process without outputting welding energy; the pressing process includes pressing the pressure detection medium (2) at the preset pressing position using a pressing mechanism (3) so that the busbar (12) is in contact with the cell (11); Based on the pressure detection medium (2) used to complete the simulated welding, the welding clamping performance of the clamping mechanism (3) is determined.

2. The welding clamping detection method as described in claim 1, characterized in that, The pressure detection medium (2) is used to generate visual information characterizing the welding clamping performance based on the pressure location and pressure when under pressure.

3. The welding clamping detection method as described in claim 2, characterized in that, The determination of the welding clamping performance of the clamping mechanism (3) based on the pressure detection medium (2) used to complete the simulated welding includes: Based on the visualization information generated by the pressure detection medium (2) that completes the simulated welding, the welding clamping performance of the clamping mechanism (3) characterized by the visualization information is determined.

4. The welding clamping detection method according to any one of claims 1-3, characterized in that, The welding clamping detection method further includes: Before the pressure detection medium (2) is placed over the preset clamping position of the battery module (1) to be welded (1), the welding clamping detection method further includes: Multiple battery cells (11) are stacked to obtain the battery cell stack of the battery module (1) to be welded; The busbar (12) is aligned with the battery cell stack so that the busbar (12) corresponds to the position of the terminal (111) of the corresponding battery cell (11).

5. The welding clamping detection method as described in claim 4, characterized in that, The step of covering the battery module (1) to be welded with the pressure detection medium (2) at the preset pressing position of the battery module (1) to be welded includes: Determine the target area on the battery module (1) to be welded for setting the pressure detection medium (2); wherein the preset pressing position is located within the target area; The pressure detection medium (2) is placed in the target area to cover the preset pressing position within the target area.

6. The welding clamping detection method as described in claim 4, characterized in that, The process of stacking multiple battery cells (11) to obtain the battery cell stack body of the battery module (1) to be welded includes: Multiple cells (11) are stacked at the stacking station to obtain the cell stack body, and the first position information of the terminal (111) of each cell (11) in the cell stack body is obtained; The simulated welding of the battery module (1) to be welded, which is equipped with the pressure detection medium (2), includes: The battery module (1) to be welded, which is equipped with the pressure detection medium (2), is transferred to the welding station corresponding to the welding device; wherein, the welding device includes the clamping mechanism (3) and the welding mechanism; The first position information is converted into target motion coordinate information for the pressing mechanism (3), and the pressing mechanism (3) is controlled to press the pressure detection medium (2) at the preset pressing position based on the target motion coordinate information.

7. The welding clamping detection method as described in claim 6, characterized in that, The step of converting the first position information into target motion coordinate information of the clamping mechanism (3) includes: Based on the first position information and the relative positional relationship between the stacking station and the welding station, the second position information of the terminal (111) of each cell (11) in the cell stack at the welding station is determined; Based on the second position information and the third position information of the terminal post (111) of each cell (11) in the cell stack of the standard battery module at the welding station, the position offset is determined; wherein, the position offset is the position of the terminal post (111) of each cell (11) in the cell stack of the battery module (1) to be welded, relative to the position of the corresponding terminal post (111) in the standard battery module; Based on the position offset, the standard motion coordinate information of the standard battery module corresponding to the clamping mechanism (3) is offset compensated to determine the target motion coordinate information of the clamping mechanism (3) corresponding to the preset clamping position; wherein, the standard motion coordinate information is determined according to the standard clamping position of the standard battery module and the motion coordinate system constructed based on the welding device.

8. A welding clamping detection device, characterized in that, include: The medium assembly control module is used to cover the pressure detection medium (2) on the preset pressing position of the battery module (1) to be welded based on the battery module (1); wherein the battery module (1) to be welded includes a battery cell (11) and a busbar (12) that have been aligned; the preset pressing position is located on the side of the busbar (12) away from the battery cell (11); The simulated welding control module is used to simulate welding the battery module (1) to be welded with the pressure detection medium (2); wherein the simulated welding includes a pressing process without outputting welding energy; the pressing process includes pressing the pressure detection medium (2) with a pressing mechanism (3) at the preset pressing position so that the busbar (12) is in contact with the battery cell (11); The clamping performance calculation module determines the welding clamping performance of the clamping mechanism (3) based on the pressure detection medium (2) used to complete the simulated welding.

9. An electronic device, characterized in that, Including memory and processor; The memory is used to store computer programs; The processor is configured to implement the welding clamping detection method as described in any one of claims 1-7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which is read and executed by a processor to implement the welding clamping detection method as described in any one of claims 1-7.

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