Battery nickel tab welding quality testing system and battery nickel tab welding quality testing method

Abstract

A battery nickel tab welding quality testing system and a battery nickel tab welding quality testing method. The system comprises: a traverse movement platform; a testing assembly, wherein the testing assembly comprises: a support, which can be movably arranged on the transverse movement platform in a first linear direction relative to the transverse movement platform; a probe plate; and probe assemblies, wherein each probe assembly is arranged at a corresponding preset position of the probe plate and used for measuring related electrical parameters at a corresponding position of a battery under test and comprises a probe base, a plurality of probes, a plug-in electrical connector, and an adjusting mechanism, and the probe plate is arranged at the bottom end of the adjusting mechanism; a camera assembly, configured to acquire first image information of the battery under test; and a control device, configured to control the adjusting mechanism on the basis of the first image information to adjust the probe plate to a test position, wherein the first linear direction is parallel to the plane where the probe plate is located. The system can effectively test a battery product comprising a plurality of groups of battery cells arranged side by side, and prevent a manual means from being used to adjust the position of the battery, improving the testing efficiency.

Description

Battery nickel sheet welding quality detection system and battery nickel sheet welding quality detection method

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202410146991.8, filed on February 2, 2024, entitled “Battery Nickel Sheet Welding Quality Detection System and Battery Nickel Sheet Welding Quality Detection Method,” which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of battery manufacturing technology, and in particular to a battery nickel sheet welding quality detection system and a battery nickel sheet welding quality detection method. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] Current power batteries generally use nickel sheets to lead out the electrodes in the battery cells. Therefore, the quality of the nickel sheet welding needs to be tested before the battery leaves the factory to prevent problems such as poor contact. This test is mainly carried out by a battery nickel sheet welding quality detection system. The battery nickel sheet welding quality detection system generally includes multiple probe assemblies, each of which is used to detect the electrical parameters (current, voltage, resistance, etc.) at a specific position of the battery nickel sheet, so as to use these parameters to determine whether the nickel sheet at that position is welded normally. However, the current battery nickel sheet welding quality detection system still has design defects and needs further improvement to improve the efficiency and accuracy of detection.

[0006] The approaches described in this section are not necessarily approaches that have been previously conceived or employed. Unless otherwise indicated, it should not be assumed that any approach described in this section is prior art simply by virtue of its inclusion in this section. Similarly, unless otherwise indicated, the issues raised in this section should not be considered as having been recognized in any prior art.

[0007] Summary of the Invention

[0008] Related art battery nickel sheet welding quality inspection systems require manual adjustment of battery position, increasing the difficulty and complexity of inspection. This application provides a battery nickel sheet welding quality inspection system and method. The battery nickel sheet welding quality inspection system of the present application embodiment can effectively inspect battery products with multiple groups of cells arranged side by side, eliminating the need for manual adjustment of battery position.

[0009] The embodiment of the first aspect of the present application provides a battery nickel sheet welding quality detection system, characterized in that it includes: a transverse platform; and a detection component, the detection component includes: a bracket, the bracket can be movably set on the transverse platform along a first straight line direction relative to the transverse platform; a probe board, which is set on the bracket; and at least one probe assembly, each probe assembly is set at a corresponding preset position of the probe board, and is configured to detect relevant electrical parameters at a corresponding position of the battery to be detected, and any probe assembly in at least one probe assembly includes: a probe seat, the probe seat includes a plurality of probe jacks separated from each other; a plurality of probes, each probe is set in a corresponding probe jack for detection Related electrical parameters; and a first plug-in electrical connector, the first plug-in electrical connector is fixed on the probe seat, one end of the first plug-in electrical connector has a plurality of first electrical contacts, each of the plurality of first electrical contacts is electrically connected to the corresponding probe, and the other end of the first plug-in electrical connector is configured to be plugged into other electrical connectors, and an adjustment mechanism, which is arranged on the bracket, and the probe plate is arranged at the bottom end of the adjustment mechanism; a camera assembly, which is arranged on the adjustment mechanism and is configured to obtain first image information of the battery to be tested; and a control device, which is configured to control the adjustment mechanism to adjust the probe plate to a test position according to the first image information, wherein the first straight line direction is parallel to the plane where the probe plate is located.

[0010] The battery nickel sheet welding quality inspection system in the embodiment of the present application has a detection component that can be moved along a first linear direction relative to the traversing platform. Therefore, during inspection, the detection component can be translated multiple times in the first linear direction, thereby enabling inspection of multiple groups of battery cells arranged side by side. Therefore, the battery nickel sheet welding quality inspection system in the embodiment of the present application can effectively inspect battery products with multiple groups of battery cells arranged side by side, avoiding the need to manually adjust the position of the batteries.

[0011] An embodiment of the second aspect of the present application provides a battery nickel sheet welding quality detection method, which is executed in the battery nickel sheet welding quality detection system according to the above-mentioned method, and the battery nickel sheet welding quality detection method includes: controlling the detection component to move to a first working position; at the first working position, using the camera component to obtain third image information of the battery to be detected; using the control device to control the adjustment mechanism to adjust the probe plate to move to the second working position according to the third image information; and at the second working position, detecting the battery to be detected by at least one probe component, and at the second working position, the probe of at least one probe component contacts the pole or nickel sheet of the battery to be detected.

[0012] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0014] FIG1 is a schematic diagram of a battery nickel sheet welding quality detection system according to some embodiments of the present application;

[0015] FIG2 is a partial schematic diagram of a battery nickel sheet welding quality detection system according to some embodiments of the present application;

[0016] FIG3 is a schematic diagram of an adjustment mechanism of a battery nickel sheet welding quality detection system according to some embodiments of the present application;

[0017] FIG4 is a schematic diagram of a probe card of a battery nickel sheet welding quality detection system according to some embodiments of the present application;

[0018] FIG5 is a schematic diagram of a probe card of a battery nickel sheet welding quality detection system according to some embodiments of the present application;

[0019] FIG6 is a schematic diagram of a probe assembly of a battery nickel sheet welding quality inspection system according to some embodiments of the present application;

[0020] FIG7 is a schematic diagram of a probe assembly of a battery nickel sheet welding quality inspection system according to some embodiments of the present application;

[0021] FIG8 is a flow chart of a method for detecting welding quality of battery nickel sheets according to some embodiments of the present application;

[0022] FIG9 is a flow chart of a method for adjusting the position of a probe card according to some embodiments of the present application.

[0023] Explanation of the reference numerals 10, battery nickel sheet welding quality detection system; 20, battery product; 30, transportation mechanism; 100, transverse platform; 110, slide; 120, tank chain; 200, detection component; 210, bracket; 220, probe plate; 230; probe assembly; 211, bottom plate; 240, lifting mechanism; 241, lifting plate; 243, guide rod; 244, screw rod; 245, support plate; 250, adjustment mechanism; 251, first translation adjustment part; 2511, first translation plate; 2512, first L-shaped motion block; 252, second translation adjustment part; 2521, second translation plate; 2522, second L-shaped motion block; 2523, second screw Rod; 253, rotation adjustment part; 254, probe board mounting frame; 2541, side panel; 2542, mounting groove; 2543, opening; 2544, lock; 221, square frame; 222, probe moving mechanism; 223, second plug-in electrical connector; 231, probe seat; 232, voltage probe; 233, current probe; 234, first plug-in electrical connector; 235, first electrical contact; 236, probe seat mounting hole; 300, camera assembly; 400, automatic inspection mechanism; 410, sample part; 420, guide rail. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0032] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0033] As mentioned above, how to improve the production quality of power batteries and reduce the defect rate of power batteries before leaving the factory has become an important research topic. Current power batteries generally use nickel sheets to lead out the electrodes in the battery cells. Therefore, the welding quality of the nickel sheets of the batteries needs to be tested before the batteries leave the factory to prevent problems such as poor contact. This test is mainly carried out by a battery nickel sheet welding quality detection system. The battery nickel sheet welding quality detection system generally includes multiple probe assemblies, each probe assembly is used to detect the electrical parameters (current, voltage, resistance, etc.) at a specific position of the battery nickel sheet, so as to use these parameters to determine whether the nickel sheet at that position is welded normally.

[0034] In related technologies, welded battery products are transported along the production line via a transport mechanism (e.g., a conveyor belt or other carrier) to the bottom of a battery nickel sheet welding quality inspection system for inspection. This system includes a lifting mechanism with a probe plate mounted at its base. Multiple probe assemblies are mounted at different locations on the probe plate to inspect the welding quality of the nickel sheet at various locations on the battery product.

[0035] The battery nickel sheet welding quality detection system in the related art has the following problems: First, the current battery products are large in size and may contain multiple groups of battery cells arranged side by side. However, the area of ​​the probe plate is limited and cannot cover all the battery cells. In this case, the battery nickel sheet welding quality detection system cannot detect the electrical parameters of the nickel sheets of all battery cells at one time. This will result in the possibility of manual adjustment of the position of the battery, thereby increasing the difficulty and complexity of the detection. In addition, in the battery nickel sheet welding quality detection system in the related art, the probe plate is fixedly set on the lifting mechanism, and the probe assembly on the probe plate is also pre-fixed on the probe plate. Therefore, the battery nickel sheet welding quality detection system in the related art has a probe plate and a probe assembly that are difficult to disassemble, thereby increasing the difficulty of replacing these parts.

[0036] In view of this, an embodiment of the present application provides a new type of battery nickel sheet welding quality detection system, which has a detection component that can be moved along a first straight line direction relative to a transverse platform. Therefore, when performing detection, the detection component can be translated multiple times in the first straight line direction, thereby realizing detection of multiple groups of battery cells arranged side by side. Therefore, the battery nickel sheet welding quality detection system of the embodiment of the present application can effectively detect battery products with multiple groups of battery cells arranged side by side, avoiding the use of manual means to adjust the position of the battery. In addition, in the battery nickel sheet welding quality detection system of the embodiment of the present application, the probe plate is detachably arranged on the bracket of the detection component, and the probe assembly on the probe plate is also detachably mounted to the probe plate, thereby reducing the difficulty of replacing the probe plate or the probe assembly.

[0037] The system disclosed in the embodiment of the present application can be used to detect the welding quality of battery nickel sheets to determine whether the battery meets the factory production quality requirements.

[0038] FIG1 is a schematic diagram of a battery nickel sheet welding quality inspection system according to some embodiments of the present application. As shown in FIG1 , the working principle of the battery nickel sheet welding quality inspection system 10 includes the following steps: when the battery product 20 has not reached the bottom of the inspection assembly 200, the inspection assembly 200 remains in a raised position; when the battery product 20 reaches the bottom of the inspection assembly 200 (for example, the transport mechanism 30 transports the battery product 20 to the bottom of the inspection assembly 200, and the battery lifting mechanism further lifts the battery product 20 upward), the battery nickel sheet welding quality inspection system 10 starts the inspection, and the inspection assembly 200 can move horizontally on the transverse platform 100. Based on the position after the transverse movement, the inspection assembly 200 can further adjust its own position to reach the downward position, at which the probe assembly on the inspection assembly 200 can contact the nickel sheet or terminal on the battery product 20 to complete the inspection of relevant electrical parameters.

[0039] In addition, the battery nickel sheet welding quality inspection system 10 may further include an automatic spot inspection mechanism 400 , which will be further described below.

[0040] The embodiments of the present application provide a battery nickel sheet welding quality detection system. Figure 2 is a partial schematic diagram of the battery nickel sheet welding quality detection system of some embodiments of the present application; Figure 3 is a schematic diagram of the adjustment mechanism 250 of the battery nickel sheet welding quality detection system of some embodiments of the present application; Figure 4 is a schematic diagram of the probe board 220 of the battery nickel sheet welding quality detection system of some embodiments of the present application; Figure 5 is a schematic diagram of the probe board 220 of the battery nickel sheet welding quality detection system of some embodiments of the present application; Figure 6 is a schematic diagram of the probe assembly 230 of the battery nickel sheet welding quality detection system of some embodiments of the present application. As shown in Figures 2 to 4, the battery nickel sheet welding quality detection system includes: a transverse platform 100 and a detection assembly 200. To simplify the drawings, FIG2 only shows the traverse platform 100 and a portion of the bracket 210 in the detection assembly 200 (i.e., the base plate 211 and the lifting mechanism 240). FIG3 shows another portion of the bracket 210 (i.e., the adjustment mechanism 250). In an actual system, the portion shown in FIG3 is connected to the bottom of the detection assembly 200 shown in FIG2 to form the bracket 210. The probe plate 220 shown in FIG4 will be installed in the bracket 210 portion shown in FIG3 to form the entire detection assembly 200. The battery nickel sheet welding quality detection system includes a traverse platform 100, a detection assembly 200, a camera assembly 300, and a control device.

[0041] The transverse moving platform 100 constitutes the main part of the battery nickel sheet welding quality detection system and is stationary relative to the surrounding environment.

[0042] The detection component 200 is arranged on the transverse platform 100. As described above, the detection component 200 includes at least: a bracket 210, a probe plate 220, at least one probe component 230 and an adjustment mechanism (250). The bracket 210 is capable of moving along a first straight line direction (the X direction shown in Figure 2) relative to the transverse platform 100. The probe plate 220 is arranged on the bracket 210 (for example, it can be arranged below the bracket 210). As shown in Figures 4 and 5, each probe component 230 is arranged at a corresponding preset position of the probe plate 220, and is configured to detect relevant electrical parameters at the corresponding position of the battery to be detected. As shown in Figures 2 and 3, the bracket 210 also includes an adjustment mechanism 250. The probe plate 220 is arranged at the bottom end of the adjustment mechanism 250.

[0043] The camera assembly 300 is disposed on the adjustment mechanism 250 , and the camera assembly 300 is configured to obtain first image information of the battery to be inspected.

[0044] The control device (not shown in the figure) is configured to control the adjustment mechanism 250 to adjust the probe board 220 to the test position according to the first image information (for example, adjust the position or angle of the probe board 220 in the X, Y, and Z planes so that the probes on the probe board 220 are aligned with the poles or nickel sheets on the battery to be tested).

[0045] The direction of the first straight line is parallel to the plane where the probe card 220 is located. That is, during the movement of the detection component 200 , the probe card 220 only moves laterally within the plane where the probe card 220 is located.

[0046] In the example, a plurality of detection positions can be pre-set in the first straight line direction (X direction in the figure), and the number of these detection positions can be determined according to the number of battery cells. For example, when the battery product has three groups of battery cells arranged side by side, three detection positions A, B and C can be pre-set. When the first group of battery cells is first detected, the system can drive the detection component 200 to move to the corresponding position A. At this time, when the probe plate 220 is pressed down, the probe component 230 on the probe plate 220 will contact the nickel sheet on the first group of battery cells, thereby obtaining the electrical parameters of the nickel sheet of the first group of battery cells. When the second group of battery cells is detected, the system can drive the detection component 200 to move to the corresponding position B. At this time, when the probe plate 220 is pressed down, the probe on the probe plate 220 will contact the nickel sheet on the second group of battery cells; similarly, the detection component 200 can be driven to move to position C to detect the electrical parameters of the nickel sheet of the third group of battery cells. It will be understood that the three groups of cells in this example are merely exemplary. In other embodiments, the battery may include two or more groups of cells, and a corresponding number of detection positions may be set. In other embodiments, the detection positions may not need to be pre-set, but may be manually adjusted based on the actual distribution of cells in the battery or automatically adjusted through image analysis or other means.

[0047] As shown in Figure 3, the camera assembly 300 may include a camera and a light source, and the light source provides shooting light for the camera. The camera assembly 300 may be arranged in the adjustment mechanism 250, as shown in Figure 3. The camera and the light source are both arranged downward to be used to capture images of the battery cell group. The image acquired by the camera assembly 300 can be subsequently uploaded to the control device, which performs image analysis to determine the position gap in the horizontal direction between the battery core nickel sheet of the battery to be tested and the test plate. The control device further determines the position distance (or compensation value) that the probe plate 220 needs to adjust based on the position gap. The control device sends the compensation value to the lower computer (controller) of the battery nickel sheet welding quality detection system, and the lower computer controls the adjustment mechanism 250 to adjust the position of the probe plate 220 in its own plane (i.e., the horizontal direction in the figure) to align with the battery core nickel sheet below it. It will be understood that the camera assembly 300 may include one or more cameras.

[0048] In the example, the process of the above image analysis is as follows: establish an xy coordinate system for the probe plate 220. In order to facilitate subsequent adjustment through the adjustment mechanism 250, the x-axis of the above coordinate system is in the same direction as the third straight line, and the y-axis of the coordinate system is in the same direction as the fourth straight line. Two cameras can be provided on the bracket 210 of the probe plate 220. First, the two cameras are calibrated in the xy coordinate system and the center of rotation is determined. Each camera determines a marking point on the image, which can be a feature point of the battery (such as the edge point, center point and other geometric feature points of the battery). First, determine the position of the marking point actually found in the captured image in the xy coordinate system and the position offset of the pre-calibrated marking point in the camera field of view, and determine the adjustment distance that the probe plate 220 needs to be in the third straight line direction and the fourth straight line direction by determining the x-axis and y-axis offsets between the above marking points. Two pre-calibrated markers on the two cameras form a line 1, and two markers in the actual image form a line 2. The angle between the two lines can be calculated from their slopes in the xy coordinate system. This angle represents the tilt angle of the battery product. The control device uses this tilt angle to determine the rotation angle of the rotation adjustment unit 253 of the adjustment mechanism 250. During the adjustment process, the rotation operation is performed first, followed by translation adjustment using the first and second translation adjustment units 251, 252.

[0049] The battery nickel sheet welding quality inspection system in the embodiment of the present application includes an inspection component 200 that is movable along a first linear direction relative to the traversing platform 100. Therefore, during inspection, the inspection component 200 can be translated multiple times in the first linear direction, thereby enabling inspection of multiple groups of battery cells arranged side by side. Therefore, the battery nickel sheet welding quality inspection system in the embodiment of the present application can effectively inspect battery products with multiple groups of battery cells arranged side by side, avoiding the need to manually adjust the position of the batteries.

[0050] In addition, by setting up the camera assembly 300 to obtain an image of the battery cell group, the battery nickel sheet welding quality detection system can adjust the position of the probe card 220 through the analysis result of the image, thereby improving the accuracy of the position adjustment.

[0051] In some embodiments, the probe card 220 is detachably mounted on the bracket 210 to move along with the bracket 210 .

[0052] As described above, the probe card 220 can be removably mounted on the bracket 210 shown in Figure 3. Installation methods include, but are not limited to, snap-on mounting, plug-in mounting, and threaded mounting. After installation, ensure that the probe card 220 does not move laterally to prevent subsequent detection errors.

[0053] In the battery nickel sheet welding quality inspection system of the embodiment of the present application, the probe card 220 is detachably mounted on the bracket 210 of the inspection assembly 200, thereby reducing the difficulty of replacing the probe card 220. If the probe card 220 fails or is damaged, the probe card 220 can be directly removed from the bracket 210 and replaced with a new one, avoiding the need to replace the entire bracket 210.

[0054] The bracket 210 includes a base plate 211. The base plate 211 is configured to be connected to the traversing platform 100 for relative movement, thereby driving the bracket 210 to move. The traversing platform 100 includes a first drive mechanism (not shown in the figure due to obstruction), the output end of which is connected to the base plate 211 to drive the base plate 211 to move relative to the traversing platform 100.

[0055] 2 , a set of slides 110 can be fixedly mounted on the transverse platform 100. In the embodiment shown in FIG2 , the slides 110 are two parallel slides 110 extending in the X direction. A base plate 211 is mounted on the slides 110 and can slide in both directions along the direction in which the slides 110 extend.

[0056] The additional slide 110 is provided to ensure that the detection component 200 moves as a whole along the extension direction of the slide 110, thereby preventing the detection component 200 from being skewed during the movement.

[0057] According to some embodiments of the present application, one side surface of the base plate 211 is provided with at least one group of sliders arranged along the first straight line direction (not shown in the figure due to obstruction), and the relative position of the transverse moving platform 100 is provided with at least one group of slide rails adapted to the at least one group of sliders, and the at least one group of sliders is respectively embedded in the corresponding at least one group of slide rails to realize a sliding connection between the base plate 211 and the transverse moving platform 100.

[0058] As shown in FIG2 , the number of slide rails can be set to two, each of which is respectively provided on a slide platform 110 and extends in the same direction as the slide platform 110. Accordingly, the number of sliders can also be set to two groups, each group of sliders being provided on the bottom surface of the bottom plate 211 and being able to slide in the corresponding slide rail.

[0059] The provision of the slide rails and the corresponding sliders can ensure that the bottom plate 211 moves stably and smoothly along the X direction on the transverse platform 100 .

[0060] As shown in Figures 2 and 3, the bracket 210 also includes: a lifting mechanism 240 and an adjustment mechanism 250. As described above, the portion of the detection component 200 shown in Figure 2 is the lifting mechanism 240 portion of the bracket 210, and Figure 3 shows the adjustment mechanism 250 portion of the bracket 210. The lifting mechanism 240 can be movably arranged on the base plate 211 along the up and down directions, and the up and down directions are not parallel to the first straight line direction. The adjustment mechanism 250 is arranged below the lifting mechanism 240 (for example, the component above the adjustment mechanism 250 can be connected to the component below the lifting mechanism 240 so as to be relatively movably connected), and the probe plate 220 is detachably arranged at the bottom end of the adjustment mechanism 250.

[0061] As shown in FIG3 , a probe plate mounting bracket 254 is provided at the bottom of the adjustment mechanism 250 (the adjustment mechanism 250 may also include other components, which are primarily position adjustment components and will be described in detail below). The probe plate 220 is detachably mounted on the bottom end of the probe plate mounting bracket 254. Therefore, the probe plate 220 is positioned directly below the entire detection assembly 200. When the battery nickel sheet welding quality detection system drives the detection assembly 200 to perform a downward operation, the probe plate 220 will move accordingly and contact the upper surface of the nickel sheet of the battery cell.

[0062] The probe card 220 is detachably mounted at the bottom of the adjustment mechanism 250, allowing for immediate removal and replacement should a malfunction occur. Furthermore, different probe cards 220 can be installed to suit different battery products (different probe cards 220 can have probe assemblies 230 with different detection locations), enabling testing of different battery products.

[0063] The bottom end of the adjustment mechanism 250 is provided with a pair of mounting slots 2542 extending along a second linear direction. The second linear direction is parallel to the plane of the probe card and perpendicular to the first linear direction. One end of the pair of mounting slots 2542 has an opening 2543 to allow the probe card 220 to be inserted into or removed from the bracket 210.

[0064] As described above, the bottom end of the adjustment mechanism 250 has a probe plate mounting frame 254, which is provided with two vertically arranged side panels 2541 on the left and right. Each mounting groove 2542 in the above-mentioned pair of mounting grooves 2542 is arranged on the inner side of the bottom edge of the corresponding side panel 2541, and the pair of mounting grooves 2542 are arranged relative to each other. The various dimensions of the mounting groove 2542 are adapted to the dimensions of the probe plate 220. Specifically, the length of the mounting groove 2542 should be approximately equal to the length of the probe plate 220 in this direction, the spacing between the two mounting grooves 2542 is approximately equal to the width of the probe plate 220 in this direction, and the notch width of the mounting groove 2542 is approximately equal to the thickness of the probe plate 220. The above-mentioned size setting can ensure that the probe plate 220 is installed in place.

[0065] The installation slots 2542 allow the probe card 220 to be inserted into the bracket 210 , thereby simplifying the installation and removal of the probe card 220 .

[0066] In addition, as shown in Figure 3, the first straight line direction can be the X direction, and the second straight line direction can be the Y direction. That is, the installation or removal direction of the probe plate 220 is perpendicular to the direction in which the detection component 200 drives the probe plate 220 to move horizontally. This arrangement ensures that a slight sliding of the probe plate 220 in the extension direction (Y direction) of the installation slot 2542 will not affect the position of the probe plate 220 in the first straight line direction, thereby avoiding the probe plate 220 from being unable to align with different battery cell groups, resulting in inaccurate measurements.

[0067] According to some embodiments of the present application, the bottom end of the adjustment mechanism 250 further has at least one lock 2544 disposed at each opening 2543 . The lock 2544 can open or close the opening 2543 to allow or prevent the probe card 220 from being inserted into the bracket 210 .

[0068] As shown in Figure 3, one end of each mounting slot 2542 can be a closed port, from which the probe plate 220 cannot be withdrawn; the other end is an opening 2543 provided with a lock 2544. When the lock 2544 is open, the probe plate 220 can be withdrawn from the port, and when the lock 2544 is closed, the probe plate 220 cannot be withdrawn and is fixed in place. Specifically, each lock 2544 can include a pivotable seal and a locking pin provided at the free end of the seal. When it is necessary to close the opening 2543, the seal is rotated to close the opening 2543, and the locking pin is inserted into the fixing hole provided on the edge of the mounting slot 2542 to achieve the locking of the opening 2543; when it is necessary to open the opening 2543, the locking pin is first pulled out of the fixing hole, and then the seal is rotated outward to open the opening 2543.

[0069] The lock 2544 can better fix the probe card 220 and prevent the probe card 220 from being separated from the mounting slot 2542 during the detection process.

[0070] In some embodiments, the control device may include: a host computer, configured to process the first image information to obtain the difference between the current position of the adjustment mechanism 250 and the target position; and a lower computer, configured to control the adjustment mechanism 250 to adjust the probe plate to the target position based on the difference (or compensation value).

[0071] In this example, the host computer (or processor) can first determine the position of the marker actually found in the captured image in the xy coordinate system and the position offset of the pre-calibrated marker in the camera field of view, and determine the adjustment distance that the probe plate 220 needs to be adjusted in the third and fourth linear directions by determining the x-axis and y-axis offsets between the above markers. The lower computer (controller) then controls the adjustment mechanism 250 to adjust the probe plate to the target position based on the adjustment distance determined by the host computer.

[0072] The lifting mechanism 240 includes: a lifting plate 241, a support plate 245, and a plurality of guide rods 243. The lifting plate 241 and the support plate 245 are respectively arranged above and below the base plate 211, and the adjustment mechanism 250 can be arranged below the support plate 245 (the components above the adjustment mechanism 250 can be connected to the components below the support plate 245 so as to be relatively movable). Each guide rod 243 passes through the base plate 211 and its two ends are respectively connected to the lifting plate 241 and the support plate 245 to achieve the linkage between the lifting plate 241 and the support plate 245. A second drive mechanism is also provided on the base plate 211, and the output end of the second drive mechanism is connected to the lifting plate 241 to drive the lifting plate 241 to move up and down relative to the base plate 211.

[0073] As shown in Figure 2, the lifting plate 241 and the support plate 245 are both arranged parallel to the base plate 211 (i.e., in the XY plane in the figure). The number of guide rods 243 can be 4, which are respectively arranged at positions near the corners of the lifting plate 241 and the support plate 245. Openings are provided at corresponding positions on the base plate 211 to allow the corresponding guide rods 243 to pass through. Since the two ends of each guide rod 243 are rigidly connected to the bottom surface of the lifting plate 241 and the top surface of the support plate 245, the lifting plate 241 and the support plate 245 can move up and down as a whole. The above-mentioned second driving mechanism can be an electric motor, the output shaft of the motor is a screw rod 244, and the free end of the screw rod 244 is threadedly connected to the lifting plate 241. During the operation of the motor, the screw rod 244 will be driven to rotate forward or reverse, and the lifting plate 241 will be raised and lowered by the relative motion between the screw rod 244 and the thread. The rise and fall of the lifting plate 241 will drive the support plate 245 below to rise and fall by the same amplitude. It can be understood that the settings of the motor, screw rod 244 and threaded connection in this embodiment are only schematic. In other embodiments, the lifting plate 241 can be moved by other means, for example, using a movable cylinder to drive the lifting plate 241 to move.

[0074] By providing a linkage mechanism of the lifting plate 241 and the support plate 245 on the bottom plate 211, the lifting and lowering of the support plate 245 below the bottom plate 211 can be achieved. The adjustment mechanism 250 is provided at the bottom of the support plate 245. Therefore, the adjustment mechanism 250 and the probe plate 220 mounted thereon can move up and down with the support plate 245. In the embodiment of the present application, the lifting device including the lifting plate 241 and the support plate 245 can not only move along the first straight line direction with the bottom plate 211, but also move up and down relative to the bottom plate 211. This ensures that the detection system can detect multiple groups of battery cells without affecting the normal downward pressure operation of the probe plate 220 during the detection process.

[0075] As shown in FIG3 , according to some embodiments of the present application, the adjustment mechanism 250 is a two-dimensional adjustment mechanism 250, and the adjustment mechanism 250 includes: a first translation adjustment portion 251, a second translation adjustment portion 252, and a rotation adjustment portion 253. The first translation adjustment portion 251 is configured to adjust the position of the probe card 220 in a third linear direction within the plane where the probe card 220 is located; the second translation adjustment portion 252 is configured to adjust the position of the probe card 220 in a fourth linear direction within the plane where the probe card 220 is located, wherein the fourth linear direction is orthogonal to the third linear direction; and the rotation adjustment portion 253 is configured to adjust the rotation angle of the probe card 220 within the plane where the probe card 220 is located.

[0076] The first translation adjustment part 251 and the second translation adjustment part 252 can have similar components. Specifically, taking the first translation adjustment part 251 as an example, it includes a first translation plate 2511, a first L-shaped motion block 2512, a first servo motor and a first screw (not shown to simplify the drawings). The first servo motor and the first screw are arranged on the support plate 245 of the lifting mechanism 240. The first L-shaped motion block 2512 is installed on the first screw. The first L-shaped motion block 2512 passes through the hollow part of the support plate 245. The first servo motor drives the first screw to rotate to make the first L-shaped motion block 2512 move horizontally. A guide rail extending along the third straight line direction is installed at the bottom of the support plate 245 to place the first translation plate 2511. The first L-shaped motion block 2512 is locked on the top of the first translation plate 2511, thereby realizing the movement of the first translation plate 2511 in the third straight line direction. The second translation adjustment unit 252 is generally disposed below the first translation adjustment unit 251. Similarly, the second translation adjustment unit 252 includes a second translation plate 2521, a second L-shaped motion block 2522, a second servo motor, and a second lead screw 2523. A guide rail extending along the fourth straight line is mounted at the bottom of the first translation plate 2511 to accommodate the second translation plate 2521. A second servo motor and a second lead screw 2523 are mounted at the bottom of the first translation plate 2511. The second L-shaped motion block 2522 is mounted on the second lead screw 2523. The second L-shaped motion block 2522 passes through the hollow portion of the second translation plate 2521 and is locked to the bottom of the first translation plate 2511. The servo motor drives the second lead screw 2523 to rotate, causing the second translation plate 2521 to move horizontally relative to the first translation plate 2511. The rotation adjustment unit 253 may include a rotating platform and a rotating bearing. The rotating platform and the rotating bearing are disposed at the bottom of the second translation plate 2521 and connected to the probe plate mounting frame 254 . The rotating bearing drives the rotating platform to rotate, thereby driving the probe plate 220 to rotate.

[0077] By providing the first translation adjustment portion 251 , the second translation adjustment portion 252 and the rotation adjustment portion 253 , the probe card 220 can move freely within its own plane, so as to calibrate the position of the probe card 220 before the battery nickel sheet welding quality inspection.

[0078] FIG6 shows a schematic structural diagram of a probe assembly 230 according to an embodiment of the present disclosure. As shown in FIG6 , any one of the at least one probe assembly 230 includes: a probe base 231, a plurality of probes, and a first plug-in electrical connector 234. The probe base 231 includes a plurality of probe jacks separated from each other. Each probe is disposed in a corresponding probe jack for detecting relevant electrical parameters. The first plug-in electrical connector 234 is fixed to the probe base 231, and one end of the first plug-in electrical connector 234 has a plurality of first electrical contacts 235, each of the plurality of first electrical contacts 235 being electrically connected to a corresponding probe, and the other end of the first plug-in electrical connector 234 is configured to be plugged into other electrical connectors.

[0079] The probe seat 231 constitutes the main body of the probe assembly 230. A plurality of preset positions on the probe plate 220 can be provided with mounting holes, and the probe assembly 230 at the position can be installed by inserting the probe seat 231 into the corresponding mounting holes. As shown in Figure 6, the first plug electrical connector 234 can be an aviation socket. Aviation sockets usually have a plastic or metal shell around the contacts, and the contacts are embedded in an insulating material to keep them aligned. These contacts are usually paired with cables, and this structure of the aviation socket is particularly resistant to environmental interference. In the example shown in Figure 6, the aviation socket has four first electrical contacts 235, which include a pair of voltage contacts and a pair of current contacts. Correspondingly, the plurality of probes include a pair of positive and negative voltage probes 232 and a pair of positive and negative current probes 233. The voltage probe 232 will collect the voltage signal of the position to be detected, and the current probe 233 will collect the current signal of the position to be detected. These probes are arranged on the support of the aviation socket. When the probe plate 220 is pressed down, the downwardly extending tips of the probes will contact the nickel sheet of the battery to be tested, causing the probes to retract toward the aviation socket. The upward ends of the probes will therefore contact multiple first electrical contacts 235 to transmit electrical signals to the aviation socket.

[0080] It is understood that although in this embodiment, the probe assembly 230 has four probes and is used to detect the voltage and current signals of the nickel sheet, in other embodiments, the probe assembly 230 may have more or fewer than four probes and may detect electrical signals other than voltage or current. Furthermore, in other embodiments, the probes and corresponding first contacts may contact each other in other ways, which are not limited herein.

[0081] By providing a probe holder 231 that can be adapted to the probe plate 220, the probe assembly 230 can be detachably installed on the probe plate 220, thereby improving the flexibility of replacing the probe assembly 230. In addition, mounting holes can be provided at various positions on the probe plate 220, so that the probe assembly 230 on the probe plate 220 can be adaptively arranged according to the distribution of nickel sheets on the battery product, thereby ensuring that the detection position on the battery nickel sheet is set in a targeted manner. By providing a first plug-in electrical connector 234, it is convenient to collect and transmit the electrical signals detected by the probe to an external device.

[0082] The first plug-in electrical connector 234 includes a locking component configured to lock the first plug-in electrical connector 234 with the other electrical connector when the first plug-in electrical connector 234 is plugged with the other electrical connector.

[0083] The locking component may be, for example, a fixing bolt, a clamping or plugging locking mechanism.

[0084] The locking component is provided to improve the connection stability between the first plug-in electrical connector 234 and other electrical connectors.

[0085] The battery nickel sheet welding quality detection system also includes: a second plug-in electrical connector 223, which is arranged on one side of the probe board 220, and the first plug-in electrical connector 234 of the probe assembly 230 is electrically connected to the second plug-in electrical connector 223 through a wire.

[0086] As shown in FIG4 , the second plug-in electrical connector 223 is provided on one side of the probe plate 220 in the Y direction in the figure. The number of the second plug-in electrical connectors 223 can be the same as the number of the first plug-in electrical connectors 234, and each second plug-in electrical connector 223 receives the electrical signal in the first plug-in electrical connector 234 through a wire. In some embodiments, the second plug-in electrical connector 223 can be a Harding connector. Subsequently, the second plug-in electrical connector 223 can further transmit the electrical signal to other signal receiving devices fixed on the transverse platform 100 through a wire. As shown in FIG2 , the above-mentioned wire can be fixed by a tank chain 120 provided on the transverse platform 100.

[0087] The second plug-in electrical connector 223 is provided to facilitate the export of the electrical signal obtained in the probe assembly 230 .

[0088] The probe card 220 includes at least one probe moving mechanism 222, and at least some of the at least one probe assembly 230 are mounted on the probe moving mechanism 222. For example, some probe assemblies 230 may be mounted on corresponding probe moving mechanisms 222 via their probe seats 231. The probe moving mechanism 222 is configured to extend the probe assembly 230 mounted thereon from or retract it into the probe card 220.

[0089] As shown in Figure 4, probe plate 220 can be a rectangular frame 221 structure, and multiple probe assemblies 230 can be arranged on each side of rectangular frame 221. A plurality of probe moving mechanisms 222 are spanned between the two long sides of rectangular frame 221. In the example shown in Figure 4, there are two probe moving mechanisms 222, and in other embodiments, there can also be more than two probe moving mechanisms 222. The number of probe moving mechanisms 222 and the distribution of probe assemblies 230 thereon can be arranged according to the distribution of battery cells, thereby ensuring that the detection range can cover all nickel sheets. In an example, as shown in Figure 6, probe seat 231 can have probe seat mounting hole 236 (such as threaded hole), and probe moving mechanism 222 can also have mounting hole (such as threaded hole), by aligning the mounting hole on probe seat 231 and probe moving mechanism 222 and fixing with screws, probe assembly 230 can be installed on probe moving mechanism 222. It will be understood that the cooperation between the probe seat 231 and the probe moving mechanism 222 is not limited to the above-mentioned method. For example, the corresponding positions of the probe seat 231 and the probe moving mechanism 222 can have mutually cooperating snap-fit ​​structures, and the probe assembly 230 and the probe moving mechanism 222 can be quickly installed and disassembled through the mutually cooperating snap-fit ​​structures.

[0090] When testing batteries with a specific cell distribution, at least some of the multiple probe moving mechanisms 222 can be selectively extended from the probe plate 220, while other probe moving mechanisms 222 can be retracted into the probe plate 220. During a press-down test on the probe plate 220, only the probe assemblies 230 on the probe moving mechanisms 222 that extend out of the probe plate 220 can contact the nickel sheets of the cells and acquire electrical signals, while the probe assemblies 230 on the retracted probe moving mechanisms 222 do not generate electrical signals.

[0091] By providing the probe moving mechanism 222 and selectively extending or retracting a portion of the probe moving mechanism 222, it is possible to adaptively set the detection position according to the specific distribution of the nickel sheets in the battery cell. This can avoid detecting positions where the nickel sheets are not covered or missing positions where the nickel sheets are covered, thereby improving the accuracy of the battery nickel sheet welding quality inspection.

[0092] 4 shows two probe moving mechanisms 222. However, any number of probe moving mechanisms 222 may be provided, and each probe moving mechanism 222 may be connected to one or more probe assemblies 230, thereby extending or retracting the one or more probe assemblies 230 mounted thereon from the probe card 220.

[0093] In an embodiment of the present disclosure, the probe moving mechanism 222 may be configured to drive the probe assembly 230 to extend from the probe plate 220 so that the probes on the probe assembly contact the terminals or nickel sheets of the battery to be tested.

[0094] In the example, when the drive probe assembly 230 extends from the probe plate 220, the probe moving mechanism 222 causes one current probe and one voltage probe of the four probes on the probe assembly to contact the pole of the battery to be tested, and causes another current probe and another voltage probe to contact the nickel sheet of the battery.

[0095] In an example, the probe moving mechanism 222 may include a cylinder. As shown in FIG4 , one end of the retractable cylinder may be fixed relative to the square frame 221 of the probe plate 220 , and the other end of the retractable cylinder may be connected to the probe assembly 230 ( FIG5 , showing that the multiple probe assemblies 230 located above are connected to the retractable cylinder in FIG4 ). The cylinder guides the piston to perform linear reciprocating motion within the cylinder, thereby extending or retracting the probe assembly 230 on the probe moving mechanism 222 from the probe plate 220 .

[0096] The extension or retraction of the probe assembly 230 may be facilitated by providing a pneumatic cylinder.

[0097] The battery nickel sheet welding quality detection system also includes: a radio frequency identifier (not shown in the figure), which is configured to identify identification information associated with the battery to be detected and send the identification information to the control device, and the control device is further configured to control the detection component 200 to move along the first straight line direction according to a preset strategy corresponding to the identification information.

[0098] The radio frequency identifier can achieve frequency signal coupling with the electronic tag through a coupling element. In the example, the battery to be detected can have an electronic tag containing identification information, or the carrier carrying the battery to be detected can have an electronic tag containing identification information associated with the battery to be detected. By identifying the identification information associated with the battery to be detected by the radio frequency identifier, the control device can determine the relevant model of the battery to be detected (different models of batteries to be detected may have different arrangements of test points, such as different numbers and spacings of test points), thereby controlling the detection component 200 to move to the appropriate detection area along the first straight line direction according to a preset strategy corresponding to the identification information.

[0099] In this way, the nickel sheet welding quality test can be performed on batteries of different models to be tested.

[0100] FIG7 is a schematic diagram of the probe assembly of the battery nickel sheet welding quality detection system of some embodiments of the present application. As shown in FIG7 , the battery nickel sheet welding quality detection system further includes: an automatic spot inspection mechanism 400. The automatic spot inspection mechanism 400 is arranged below the detection component 200 (refer to FIG1 ). The automatic spot inspection mechanism 400 includes a template member 410. The automatic spot inspection mechanism 400 is configured to drive the template member 410 from a first position outside the field of view of the camera assembly 300 to a second position within the field of view of the camera assembly 300 before the battery nickel sheet welding quality detection system starts to perform the detection. The camera assembly 300 is also configured to obtain second image information of the template member 410 before starting the detection, so as to be used for the adjustment mechanism 250 to pre-adjust the position of the probe plate 220.

[0101] The automatic inspection mechanism 400 is a template that simulates the upper surface of a real battery product. In this way, before the real battery product is inspected, the camera assembly 300 can first pre-adjust the probe plate 220 by obtaining an image of the automatic inspection mechanism 400. The second position within the field of view of the above-mentioned camera assembly 300 should coincide with the position of the actual battery product during inspection, so that the template part 410 can accurately simulate the real battery product. When the battery nickel sheet welding quality inspection system is in a non-working state, the automatic inspection mechanism 400 can be located in the first position. Before starting the inspection of the battery product, the template part 410 is driven to move to the second position. At this time, the camera assembly 300 obtains the top image of the template part 410, and the lower computer of the battery nickel sheet welding quality inspection system uploads the above image to the control device, and the control device performs image analysis on the image and obtains the analysis result. After obtaining the analysis result, the lower computer pre-adjusts the position of the probe plate 220. The image analysis process is similar to the image analysis process mentioned above and will not be repeated here. When the battery product is formally tested, the sample member 410 is driven to move to the first position again to avoid affecting the normal testing of the battery product.

[0102] By setting up an automatic inspection mechanism 400, the battery nickel sheet welding quality inspection system can pre-adjust the position of the probe plate 220. When the battery product is formally inspected later, a secondary adjustment can be performed based on the pre-adjustment, which further improves the accuracy and efficiency of the position adjustment of the probe plate 220.

[0103] Continuing with Figure 7 , the automatic inspection mechanism 400 further includes a set of guide rails 420 and a drive device. The template member is mounted on the guide rails 420 and is movable along the extension of the guide rails 420. The output end of the drive device is connected to the template member 410 and is configured to drive the template member 410 between a first position and a second position.

[0104] The driving device may include a stepping motor, an output end of which is connected to the template member 410 and can drive the template member 410 to move bidirectionally along the direction of the guide rail 420.

[0105] The guide rail 420 and the driving device are provided to facilitate the movement of the automatic inspection mechanism 400 between the first position and the second position.

[0106] It will be understood that the battery nickel sheet welding quality detection system may also include other components, for example, it may include an electrical cabinet that can be used to provide the power required for the test.

[0107] According to another aspect of the present disclosure, a method for detecting the welding quality of a battery nickel sheet is provided. The method for detecting the welding quality of a battery nickel sheet is executed in the battery nickel sheet welding quality detection system described herein. FIG8 is a flow chart of a method 800 for detecting the welding quality of a battery nickel sheet in some embodiments of the present application. As shown in FIG8 , the method 800 for detecting the welding quality of a battery nickel sheet includes:

[0108] Step 810: Control the detection component to move to the first working position;

[0109] Step 820: At the first working position, use the camera assembly to obtain third image information of the battery to be inspected;

[0110] Step 830: Using the control device, controlling the adjustment mechanism to adjust the probe card to move to the second working position according to the third image information; and

[0111] Step 840: At the second working position, the battery to be tested is tested by at least one probe assembly. At the second working position, a probe of at least one probe assembly contacts a terminal post or a nickel sheet of the battery to be tested.

[0112] In the example, the battery to be inspected has, for example, multiple areas to be inspected. The inspection component can be first controlled to move to a first working position corresponding to the first area to be inspected. Then, in steps 820 to 840, the camera and the control device can be further used to accurately position the probe board to the second working position within the range of the first working position based on the third image information taken by the camera (refer to the image analysis process described above), so that the probe assembly is aligned with the point to be inspected.

[0113] During testing, the testing assembly 200 can be translated multiple times in the first linear direction, thereby enabling testing of multiple groups of battery cells arranged side by side. Therefore, the battery nickel sheet welding quality testing system of the embodiment of the present application can effectively test battery products with multiple groups of battery cells arranged side by side, avoiding the need to manually adjust the position of the batteries.

[0114] According to some embodiments, the above step 820 may include: obtaining the actual position of the first marking point of the battery to be detected; and obtaining the actual position of the second marking point of the battery to be detected. The above step 830 may include: determining a first connecting line between the actual position of the first marking point and the actual position of the second marking point; and controlling the adjustment mechanism to adjust the probe card to the second working position based on the first connecting line and the second connecting line, wherein the second connecting line is a connecting line between the preset position of the first marking point and the preset position of the second marking point, and in the second working position, the angle between the first connecting line and the second connecting line is less than the preset angle. In the example, the two cameras can first be calibrated in the xy coordinate system and the rotation center is determined. Each camera determines a marking point on the image, which can be a feature point of the battery (for example, a geometric feature point such as an edge point or a center point of the battery). First, the position of the marking point actually found in the captured image in the xy coordinate system is determined to be offset from the position of the pre-calibrated marking point in the camera field of view, and the adjustment distance required for the probe card 220 in the third straight line direction and the fourth straight line direction is determined by determining the x-axis and y-axis offsets between the above marking points. The two pre-calibrated marking points of the two cameras form a straight line 1, and the two marking points in the actual image form a straight line 2. The angle between the two straight lines can be calculated by the slopes of the two straight lines in the xy coordinate system. The angle between the two straight lines is the inclination angle of the battery product. The control device determines the rotation angle performed by the rotation adjustment part 253 of the adjustment mechanism 250 through the inclination angle.

[0115] This can improve the accuracy of probe card position adjustment.

[0116] According to some embodiments, the battery nickel sheet welding quality detection system may further include a radio frequency identifier, and the battery nickel sheet welding quality detection method 800 may further include:

[0117] Before controlling the detection component to move to the first working position, using a radio frequency identifier to identify identification information associated with the battery to be detected;

[0118] sending identification information to the control device via the radio frequency identifier; and

[0119] The control device controls the detection component to move to the first working position according to a preset strategy corresponding to the identification information.

[0120] By identifying the identification information associated with the battery to be tested through the radio frequency identifier, the control device can determine the relevant model of the battery to be tested, and thus control the detection component to move along the first straight line direction to the first working position predetermined in the preset strategy according to the preset strategy corresponding to the identification information.

[0121] The following will describe in detail how to adjust the probe card 220 components before testing the battery in conjunction with FIG9. FIG9 shows a flow chart of a method 900 for adjusting the position of the probe card 220 according to an embodiment of the present disclosure. As shown in FIG9, the method 900 includes:

[0122] Step 901, waiting for the transmission equipment to transport the battery product to be tested to the bottom of the battery nickel sheet welding quality inspection system;

[0123] Step 902, determining whether the detection sensor detects a battery product;

[0124] Step 903: If the determination result of step 902 is yes, locate the battery product;

[0125] Step 904, read the battery chip information;

[0126] Step 905 , adjusting the position of the probe card 220 according to the image captured by the camera assembly 300 ;

[0127] Step 906: After the current point test is completed, the system controls the probe card 220 to move horizontally to the next photographing position and then executes the previous step;

[0128] Step 907, save and upload the detection data;

[0129] Step 908: Release the battery product.

[0130] As mentioned above, before executing step 901, the position of the probe plate 220 can be pre-adjusted using the automatic inspection mechanism 400. The pre-adjustment method is similar to the adjustment method in the actual detection process described above and will not be repeated here. In step 901, the relevant host computer (processor) of the transmission device receives a signal allowing entry to the battery product to be inspected, and waits for the transmission device to transmit the battery product to be inspected to the bottom of the battery nickel sheet welding quality inspection system. The transmission device can be, for example, a conveyor belt.

[0131] The battery nickel sheet welding quality inspection system also features various sensors and light barriers to sense the underlying battery products and their properties. In step 902, the sensors detect whether the battery carrier is in place. If the carrier is in place, the light barrier detection is activated, and the corresponding detection sensors further detect the presence of battery products within the carrier. If so, the battery product is confirmed to be in place. If not, the battery product is released.

[0132] In step 903, the lifting cylinder is raised, and the positioning pin is inserted into the pin hole of the fixture for preliminary positioning. The lifting position sensor senses the signal, and the shooting sensor senses whether the product is skewed.

[0133] The battery nickel sheet welding quality detection system may also include a radio frequency identifier. In step 904, the radio frequency identifier identifies the battery chip information in the carrier, and the lower computer (controller) of the battery nickel sheet welding quality detection system transmits the obtained product identity information to the control device, and the control device further uploads the product identity information to the manufacturing execution system to obtain other data of the product, such as the model, etc., so as to determine the detection scheme of the subsequent battery nickel sheet welding quality detection system. Exemplarily, the battery chip information can be displayed on the battery product in the form of a QR code, and the control device determines the model and other information of the battery by identifying the QR code and transmits the information to the controller of the battery nickel sheet welding quality detection system. A variety of detection schemes can be pre-stored in the controller, and the detection scheme may include the calibration position of the probe plate 220, the number and distribution of the probe assemblies 230 on the probe plate 220, etc., and each detection scheme is used for detection of different battery products. The controller can select a suitable detection scheme according to the model of the battery based on the information obtained from the control device.

[0134] In step 905, the first group of battery cells that need to be tested in the battery product is first determined, and the detection component 200 is moved horizontally to this position along the first straight line direction. Subsequently, the lifting mechanism 240 drives the probe plate 220 to press down and reach the photo-taking position. At this time, the camera component 300 takes a photo and transmits the image to the control device processor, and controls the movement of the probe plate 220 according to the compensation value obtained by the control device. After the probe plate 220 is in place, the lifting mechanism 240 descends again to the detection position, and at this time the probe assembly 230 contacts the nickel sheet on the battery cell. The system controller controls the detection circuit to be turned on in turn, and notifies the control device to perform the detection.

[0135] In step 906 , after the current position detection is completed, the lifting mechanism 240 rises, and the system controls the probe card 220 to move horizontally to the position of the next battery cell group, and repeats step 905 , that is, adjusting the position of the probe card 220 according to the image.

[0136] In step 907 , after all the battery cell groups are inspected, the lifting mechanism 240 rises, and the inspection data is saved and uploaded to the manufacturing execution system.

[0137] The above various steps about method 900 can be implemented in hardware or in hardware in combination with software and / or firmware.For example, these steps can be implemented as computer program code / instructions, which are configured to be executed in one or more processors and stored in a computer-readable storage medium. Alternatively, these steps can be implemented by hardware logic / circuitry. Hardware logic / circuitry can include an integrated circuit chip (which includes a processor (e.g., a central processing unit (CPU), a microcontroller, a microprocessor, a digital signal processor (DSP), etc.), a memory, one or more communication interfaces, and / or one or more components in other circuits), and can optionally execute the received program code and / or include embedded firmware to perform a function.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery nickel sheet welding quality detection system, comprising: Transverse platform (100); as well as A detection component (200), the detection component comprising: A bracket (210) is movably disposed on the transverse platform along a first linear direction relative to the transverse platform; A probe plate (220) is arranged on the support; At least one probe assembly (230), each of the probe assemblies being arranged at a corresponding preset position on the probe board and configured to detect relevant electrical parameters at a corresponding position of a battery to be detected, wherein any one of the at least one probe assembly (230) comprises: A probe seat (231), the probe seat comprising a plurality of probe insertion holes spaced apart from each other; a plurality of probes, each of the probes being disposed in a corresponding probe jack for detecting the relevant electrical parameters; and a first plug-in electrical connector (234), the first plug-in electrical connector (234) being fixed on the probe seat (231), and one end of the first plug-in electrical connector (234) having a plurality of first electrical contacts (235), Each of the plurality of first electrical contacts (235) is electrically connected to a corresponding probe, and the other end of the first plug-in electrical connector (234) is configured to be pluggable with another electrical connector; and An adjustment mechanism (250) is arranged on the bracket, and the probe plate (220) is arranged at the bottom end of the adjustment mechanism; A camera assembly (300), disposed on the adjustment mechanism (250), configured to obtain first image information of a battery to be inspected; and A control device is configured to control the adjustment mechanism (250) to adjust the probe card to a test position according to the first image information, wherein: The direction of the first straight line is parallel to the plane where the probe card is located.

2. The battery nickel sheet welding quality detection system according to claim 1, wherein: The probe card (220) is detachably mounted on the bracket (210) to move along with the bracket.

3. The battery nickel sheet welding quality detection system according to claim 2, wherein: The support (210) comprises: A bottom plate (211) is configured to be connected to the transverse platform (100) for relative movement to drive the bracket (210) to move, wherein: The transverse movement platform (100) comprises a first driving mechanism, wherein an output end of the first driving mechanism is connected to the base plate (211) for driving the base plate to move relative to the transverse movement platform (100).

4. The battery nickel sheet welding quality detection system according to claim 3, wherein: One side surface of the base plate (211) is provided with at least one group of sliders arranged along the first straight line direction, and the relative position of the transverse moving platform (100) is provided with at least one group of slide rails adapted to the at least one group of sliders, and the at least one group of sliders are respectively embedded in the corresponding at least one group of slide rails to realize the sliding connection between the base plate and the transverse moving platform.

5. The battery nickel sheet welding quality detection system according to claim 4, wherein: The support (210) further comprises: A lifting mechanism (240) is provided on the bottom plate (211) so as to be movable along an up-down direction, wherein the up-down direction is not parallel to the first linear direction, and wherein: The adjusting mechanism (250) is arranged below the lifting mechanism (240), and the probe plate (220) is detachably arranged at the bottom end of the adjusting mechanism (250).

6. The battery nickel sheet welding quality detection system according to claim 5, wherein: The bottom end of the adjustment mechanism (250) is provided with a pair of mounting grooves (2542) extending along a second linear direction, wherein the second linear direction is parallel to the plane where the probe plate is located and perpendicular to the first linear direction; One end of the pair of mounting grooves (2542) has an opening (2543) to allow the probe card (220) to be inserted into or removed from the bracket (210).

7. The battery nickel sheet welding quality detection system according to claim 6, wherein: The bottom end of the adjustment mechanism (250) also has at least one lock (2544) respectively arranged at each of the openings (2543), and the lock (2544) can open or close the opening (2543) to allow or prevent the probe plate (220) from being inserted into the bracket (210).

8. The battery nickel sheet welding quality detection system according to any one of claims 1 to 7, wherein: The control device comprises: a host computer configured to process the first image information to obtain a difference between a current position of the adjustment mechanism (250) and a target position; and The lower computer is configured to control the adjustment mechanism (250) to adjust the probe plate to the target position according to the difference.

9. The battery nickel sheet welding quality detection system according to claim 5, wherein: The lifting mechanism (240) comprises: The lifting plate (241) and the supporting plate (245) are respectively arranged above and below the bottom plate (211), and the adjusting mechanism (250) is arranged below the supporting plate (245); a plurality of guide rods (243), each guide rod passing through the bottom plate (211) and having two ends connected to the lifting plate (241) and the support plate (245) respectively, so as to realize the linkage of the lifting plate and the support plate; and A second driving mechanism is also provided on the bottom plate (211), and an output end of the second driving mechanism is connected to the lifting plate (241) for driving the lifting plate to move up and down relative to the bottom plate.

10. The battery nickel sheet welding quality detection system according to any one of claims 1 to 9, wherein: The regulating mechanism (250) comprises: A first translation adjustment portion (251) configured to adjust the position of the probe plate (220) in a third straight line direction within the plane where the probe plate is located; a second translation adjustment portion (252) configured to adjust the position of the probe card (220) in a fourth linear direction within the plane where the probe card is located, wherein the fourth linear direction is orthogonal to the third linear direction; and The rotation adjustment portion (253) is configured to adjust the rotation angle of the probe plate (220) within the plane where the probe plate is located.

11. The battery nickel sheet welding quality detection system according to any one of claims 1 to 10, wherein: The first plug-in electrical connector (234) includes a locking component, which is configured to lock the first plug-in electrical connector (234) with the other electrical connector when the first plug-in electrical connector (234) is plugged with the other electrical connector.

12. The battery nickel sheet welding quality detection system according to any one of claims 1 to 11, further comprising: A second plug-in electrical connector (223) is provided on one side of the probe board (220), and a first plug-in electrical connector (234) of the probe assembly (230) is electrically connected to the second plug-in electrical connector (223) via a wire.

13. The battery nickel sheet welding quality detection system according to any one of claims 1 to 12, wherein: The probe plate (220) includes a probe moving mechanism (222), and at least part of the probe components of the at least one probe component (230) are installed on the probe moving mechanism (222), and the probe moving mechanism (222) is configured to extend the probe component (230) installed thereon from the probe plate (220) or retract it into the probe plate.

14. The battery nickel sheet welding quality detection system according to claim 13, wherein: The probe moving mechanism (222) is configured to drive the probe assembly (230) to extend from the probe plate (220) so that the probes on the probe assembly contact the poles or nickel sheets of the battery to be tested.

15. The battery nickel sheet welding quality detection system according to any one of claims 1 to 14, further comprising: A radio frequency identifier is configured to identify identification information associated with the battery to be detected and send the identification information to the control device, wherein the control device is further configured to control the detection component to move along the first straight line direction according to a preset strategy corresponding to the identification information.

16. The battery nickel sheet welding quality detection system according to any one of claims 1 to 15, further comprising: An automatic spot inspection mechanism (400) is provided below the detection assembly (200), the automatic spot inspection mechanism (400) comprising a template member (410), the automatic spot inspection mechanism (400) being configured to drive the template member (410) to move from a first position outside the field of view of the camera assembly (300) to a second position within the field of view of the camera assembly (300) before the battery nickel sheet welding quality detection system begins to perform detection, wherein The camera assembly (300) is further configured to obtain second image information of the sample piece (410) before starting the inspection, so as to be used by the adjustment mechanism (250) to pre-adjust the position of the probe card (220).

17. The battery nickel sheet welding quality detection system according to claim 16, wherein: The automatic spot inspection mechanism (400) further comprises: a set of guide rails (420), wherein the template member (410) is disposed on the set of guide rails (420) and is capable of moving along an extension direction of the set of guide rails (420); and A driving device, wherein an output end of the driving device is connected to the template member (410) and is configured to drive the template member (410) to move between the first position and the second position.

18. A method for detecting the welding quality of battery nickel sheets, the method being performed in a battery nickel sheet welding quality detection system according to any one of claims 1 to 17, the method comprising: Controlling the detection component to move to a first working position; At the first working position, using the camera assembly to obtain third image information of the battery to be inspected; Using the control device, controlling the adjustment mechanism to adjust the probe card to move to a second working position according to the third image information; and At the second working position, the battery to be inspected is inspected by the at least one probe assembly, wherein at the second working position, the probe of the at least one probe assembly contacts the electrode or nickel sheet of the battery to be inspected.

19. The battery nickel sheet welding quality detection method according to claim 18, wherein: Acquiring third image information of the battery to be inspected by using the camera assembly includes: Obtaining the actual position of the first marking point of the battery to be tested; and Get the actual position of the second marking point of the battery to be tested, and Wherein, controlling the adjustment mechanism to adjust the probe card to move to the second working position according to the third image information includes: Determining a first line connecting the actual position of the first marking point and the actual position of the second marking point; and According to the first line and the second line, the adjustment mechanism is controlled to adjust the probe plate to the second working position, wherein the second line is a line connecting the preset position of the first marking point and the preset position of the second marking point, and wherein, in the second working position, the angle between the first line and the second line is less than the preset angle.

20. The battery nickel sheet welding quality detection method according to claim 18 or 19, wherein: The battery nickel sheet welding quality detection system further includes a radio frequency identifier, and wherein the battery nickel sheet welding quality detection method further includes: Before controlling the detection component to move to the first working position, using the radio frequency identifier to identify identification information associated with the battery to be detected; sending the identification information to the control device via the radio frequency identifier; and The control device controls the detection component to move to the first working position according to a preset strategy corresponding to the identification information.

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