Equipment for detecting surface profile or warping degree of surface of battery piece

Abstract

The utility model provides a device for detecting the surface profile or warping degree of the surface of a battery piece, relates to the technical field of detection, and can improve the accuracy and efficiency of warping degree detection. The detection equipment comprises a distance measuring device, the distance measuring device and a to-be-detected battery piece are oppositely arranged in a first direction, and the distance measuring device is used for measuring the distance between at least one distance measuring point in the distance measuring device and a to-be-detected point corresponding to the to-be-detected battery piece in the first direction; and the moving device drives at least one of the distance measuring device or the battery piece to be detected to move in a second direction, and the first direction is perpendicular to the second direction.

Description

Technical Field

[0001] The utility model relates to the field of detection technology, and in particular to a device for detecting the surface profile or warpage of a battery cell surface. Background Art

[0002] Warpage refers to the degree of curvature of a flat object. To determine the warpage of an object to be inspected (e.g., a cell), existing methods involve manually measuring the warpage height of the cell using a feeler gauge or steel ruler to calculate the warpage of the cell.

[0003] This solution relies on manual measurement, and the accuracy and efficiency of determining the warpage are low. Utility Model Content

[0004] The utility model provides a detection device, which can improve the accuracy of the determined warpage and the detection efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for detecting the surface profile or warpage of a battery cell surface, comprising:

[0007] A distance measuring device is arranged relative to the battery cell to be detected along a first direction, and is used to measure the distance between at least one distance measuring point in the distance measuring device and a point to be detected corresponding to the battery cell to be detected in the first direction;

[0008] The moving device drives at least one of the distance measuring device or the battery cell to be detected to move in a second direction, wherein the first direction is perpendicular to the second direction.

[0009] The utility model measures the distance between at least one distance measuring point and the to-be-detected point corresponding to the to-be-detected battery cell in the first direction by a distance measuring device, and can calculate the surface profile and the warpage of the to-be-detected battery cell based on the measured distances. Moreover, by arranging a moving device so that there is relative movement between the distance measuring device and the to-be-detected battery cell during the detection process, the distance measuring device can perform the detection of the to-be-detected battery cell in real time, which can improve the comprehensiveness of the detection, avoid the waiting time that may exist in static detection, and thus significantly improve production efficiency.

[0010] Furthermore, the moving device is connected to the distance measuring device and is used to drive the distance measuring device to move in the second direction, and the battery cell to be detected remains stationary. The moving device also includes:

[0011] A first guide rail is parallel to the second direction and is arranged opposite to the battery cell to be tested along the first direction;

[0012] The moving component is connected to the first guide rail and extends along the third direction. The moving component is used to carry multiple distance measuring devices and move along the first guide rail in the second direction.

[0013] The utility model can drive the distance measuring device to move in the second direction to automatically detect the battery cell to be detected by setting the first guide rail, and no longer relies on manual detection, thereby improving the accuracy and efficiency of determining the warpage.

[0014] Furthermore, the moving parts specifically include:

[0015] A carrying portion for carrying a plurality of distance measuring devices;

[0016] The first moving component connects the first guide rail and the bearing portion, and drives the bearing portion to move along the first guide rail in the second direction through the first moving component.

[0017] The utility model drives the carrying part to move along the first guide rail in the second direction by the first moving part, so that the distance measuring device carried by the carrying part can be moved along the guide rail to detect the battery cell to be detected. A small number of distance measuring devices can be set to realize the detection of multiple battery cells to be detected. There is no need to fixedly set up multiple distance measuring devices to detect the battery cells to be detected, which can save the cost of setting up the distance measuring devices and improve the detection efficiency.

[0018] Furthermore, the moving parts also include:

[0019] The second moving component is connected to the first moving component and the bearing part, and the second moving component drives the bearing part to move along the third direction.

[0020] Furthermore, the second movable component is a telescopic device.

[0021] Furthermore, the moving parts also include:

[0022] The second guide rail is parallel to the third direction, and the second moving component cooperates with the second guide rail to drive the distance measuring device to move along the third direction.

[0023] The utility model provides a second movable component to drive the carrying part to move along the third direction, and the distance measuring device can be moved to a suitable position in the third direction by moving the carrying part to detect the distance. At this time, a small number of distance measuring devices are provided in the third direction to realize the detection of each detection point of the battery cell to be detected in the third direction.

[0024] Furthermore, the mobile device includes:

[0025] A mobile unit that carries multiple distance measuring devices;

[0026] The robotic arm is connected to the moving part, and the robotic arm drives the moving part to move within the moving plane.

[0027] The utility model drives the moving part to move by the mechanical arm, and can more comprehensively detect the battery cell to be detected during the movement.

[0028] Furthermore, the distance measuring device is at least one of a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, and a radar sensor.

[0029] Furthermore, the detection equipment also includes:

[0030] The shell is used to cover the battery cell to be detected, the distance measuring device, and the mobile device.

[0031] Furthermore, the device also includes a detection platform, a processor connected to the distance measuring device, and a display connected to the processor. The detection platform is used to carry the battery cell to be detected, and the display is used to display the detection results of the distance measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a detection device provided by the utility model;

[0033] Figure 2 A schematic structural diagram of another detection device provided by the present invention;

[0034] Figure 3 A schematic structural diagram of another detection device provided by the present invention;

[0035] Figure 4 This is a structural schematic diagram of another detection device provided by the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] Figure 1 This is a schematic diagram of the structure of a detection device 10 provided by the present invention, as shown in FIG. Figure 1 As shown, the detection device 10 provided by the present invention includes:

[0038] Battery cell to be tested;

[0039] A distance measuring device 30 is disposed relative to the battery cell to be inspected along a first direction, and is configured to measure a distance in the first direction between at least one distance measuring point in the distance measuring device 30 and a point to be inspected corresponding to the battery cell to be inspected;

[0040] A moving device 40, the moving device 40 drives the distance measuring device 30 or at least one of the battery cells to be detected to move in a second direction, wherein the first direction is perpendicular to the second direction;

[0041] In some embodiments, the distance measuring device 30 is further configured to perform detection of the battery cell to be detected and obtain detection results during a detection process in which there is relative motion between the distance measuring device 30 and the battery cell to be detected;

[0042] The processor 50 is used to receive the detection result of the distance measuring device 30 and determine the surface profile or warpage of the battery cell to be detected based on the detection result.

[0043] The battery cell to be tested can be placed on the testing table 20 when being tested by the distance measuring device 30.

[0044] It should be noted that the supporting surface of the testing platform 20 may be rectangular, circular, regular polygonal or irregular in shape, and the present invention does not impose any specific limitation thereto.

[0045] The object to be detected may be a silicon wafer, a battery wafer, or a glass wafer. Of course, the object to be detected may also be other objects, and the present invention does not impose any specific limitation on this.

[0046] The distance measuring device 30 is at least one of a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, and a radar sensor. Laser rangefinders or ultrasonic rangefinders have low power consumption, save energy, and do not cause secondary damage to the battery cells. When multiple distance measuring devices 30 are provided, the multiple distance measuring devices 30 can be composed of one or more of laser rangefinders, ultrasonic rangefinders, infrared rangefinders, and radar sensors. For example, one laser rangefinder and two ultrasonic rangefinders can be used as the distance measuring device 30, or the distance measuring device 30 can be combined in other ways. This is not limited in the present invention.

[0047] The distance measuring device 30 is arranged according to the position of the detection platform 20. For example, the distance measuring device 30 can be opposite to the detection platform 20 vertically, or the distance measuring device 30 can also be opposite to the detection platform 20 horizontally. The present invention does not make specific restrictions on this.

[0048] In some optional embodiments, the distance measuring device 30 is arranged relative to the battery cell to be inspected along a first direction, which is the Z-axis (vertical axis). In this case, the distance measuring device 30 is vertically opposite to the battery cell to be inspected. There can be one or more distance measuring devices 30, and the distance measuring device 30 can be arranged in a manner such that multiple distance measuring devices 30 are arranged in sequence along a third direction, which is the Y-axis (longitudinal axis).

[0049] When there is only one distance measuring device 30, and the distance measuring device 30 is a laser rangefinder, the position of the laser rangefinder's probe point serves as the distance measuring point, and the distance measuring device 30 is used to measure the distance between the distance measuring point of the laser rangefinder and the point to be detected corresponding to the battery cell to be detected in the first direction as the detection distance. When there are multiple distance measuring devices 30, and the distance measuring device 30 is a laser scanner, the laser rangefinder can be configured as a laser matrix, including multiple laser probes, and the position of each probe point of the laser rangefinder serves as the distance measuring point, and the distance measuring device 30 is used to measure the distance between each distance measuring point of the laser rangefinder and each point to be detected corresponding to the battery cell to be detected in the first direction as the detection distance.

[0050] The present invention measures the distance in the first direction between at least one distance measuring point and the point to be detected corresponding to the battery cell to be detected by the distance measuring device 30, and can calculate the surface contour or warpage of the battery cell to be detected based on the measured distances. In addition, by setting a moving device 40 so that there is relative movement between the distance measuring device 30 and the battery cell to be detected during the detection process, the distance measuring device 30 can perform the detection of the battery cell to be detected in real time, which can improve the comprehensiveness of the detection, avoid the waiting time that may exist in static detection, and thus significantly improve production efficiency.

[0051] In some embodiments, the detection equipment is provided with a moving device 40, which can be set on one side of the ranging device 30 to drive the ranging device 30 to move in the second direction, where the second direction is the X-axis (horizontal axis) direction. The moving device 40 can also be set on one side of the battery cell to be detected to drive the battery cell to be detected to move in the second direction.

[0052] In some embodiments, the distance measuring device 30 and the battery cell to be detected have relative motion as follows:

[0053] In the first case, the distance measuring device 30 moves along the second direction driven by the moving device 40 , and the battery cell to be detected remains stationary. At this time, the distance measuring device 30 detects the battery cell to be detected during the movement.

[0054] In the second case, the battery cell to be detected moves along the second direction driven by the moving device 40, and the distance measuring device 30 remains stationary. At this time, the distance measuring device 30 detects the battery cell to be detected during its movement.

[0055] Since the distance measuring device 30 is stationary and the battery cell to be detected moves, relative movement is achieved between the distance measuring device 30 and the battery cell to be detected. The distance measuring device 30 is stationary, which can significantly reduce the vibration caused by the movement of the device itself, thereby improving the stability and accuracy of distance detection. By fixing the distance measuring device 30, the interference of reduced detection accuracy caused by the speed change of the distance measuring device 30 during movement can be effectively reduced.

[0056] In the third case, in some embodiments, the distance measuring device 30 moves at a first uniform speed, and the battery cell to be detected moves at a second uniform speed. The first speed and the second speed are different, so that the distance measuring device 30 and the battery cell to be detected are in a relative motion state. During the relative motion of the distance measuring device 30 and the battery cell to be detected, the distance measuring device 30 can detect the battery cell to be detected.

[0057] In the present invention, the distance measuring device 30 and the battery cell to be detected have relative movement. During the relative movement, the distance measuring device 30 can detect the distance between the battery cell to be detected and the detection point. A small number of distance measuring devices 30 can be set to complete the detection of the battery cell to be detected.

[0058] In some embodiments, the distance measuring device 30 continuously measures the distance to the cell being tested while the cell being tested is moving. In some embodiments, the distance measuring device 30 intermittently measures the distance to the cell being tested while the cell being tested is moving. For example, the distance measuring device 30 measures the distance to the cell being tested at regular intervals. The interval is not limited and can be, for example, 0.01 seconds, 1 second, etc.

[0059] Among them, the distance measuring device 30 performs detection on the battery cell to be detected and obtains the detection results during the detection process in which there is relative movement between the battery cell to be detected, that is, when the detection point of the battery cell to be detected is within the detectable range of the distance measuring device 30, the distance measuring device 30 can perform distance detection on the battery cell to be detected.

[0060] The processor 50 may be connected to the distance measuring device 30 to control the distance measuring device 30 and receive various types of information sent by the distance measuring device 30 .

[0061] The processor 50 may receive the detection result of the distance measuring device 30 and may determine the surface profile or warpage of the battery cell to be detected based on the detection result.

[0062] It should be noted that the warpage of the surface of the battery cell to be tested may be the warpage of a certain position of the battery cell to be tested, or may be the warpage of the entire battery cell to be tested, and the present invention does not impose any specific limitation on this.

[0063] When it is necessary to detect the surface contour of the battery cell to be inspected, the surface contour can be the surface contour of a certain part of the battery cell to be inspected or the surface contour of the entire battery cell to be inspected. For example, the surface contour of the edge part of the battery cell to be inspected or the surface contour at the center position of the battery cell to be inspected can be detected, or the surface contour of the entire battery cell to be inspected can be directly detected.

[0064] The processor 50 and the distance measuring device 30 may be connected via a wired connection, or the processor 50 and the distance measuring device 30 may be connected via a wireless connection, which is not specifically limited in the present invention.

[0065] Optionally, the detection device 10 further includes a display 60 connected to the processor 50 .

[0066] In some embodiments, the display 60 displays one or more of the following information: the warpage of the surface of the cell being inspected, the surface profile, and the distance between the distance measuring device 30 and the cell being inspected. The display 60 may also be provided with multiple buttons for controlling the inspection device 10. The buttons may be physical buttons or touch buttons, which are not limited in the present invention.

[0067] By setting up a display 60, the warpage and / or distance of the surface of the battery cell to be tested can be intuitively displayed. When displaying the warpage of the surface of the battery cell to be tested, it can be directly displayed as a numerical value or a three-dimensional model can be directly constructed to display the warpage of the local or entire battery cell to be tested. When the battery cell to be tested is a battery cell, the warpage can represent the quality of the battery cell. For example, a battery cell with a warpage of ≤1.5mm is classified as a good cell, a battery cell with a warpage of 1.5mm<≤2.0mm is classified as a medium-quality cell and requires adjustment of the battery cell warpage, and a battery cell with a warpage of >2.0mm is classified as a cell that does not meet the quality requirements and needs to be discarded.

[0068] The processor 50 and the display 60 may be connected via a wired connection, or the processor 50 and the display 60 may be connected via a wireless connection, and the present invention does not impose any specific limitation on this.

[0069] Optionally, the detection device 10 further includes a housing 70 , which is used to cover the battery cell to be detected, the distance measuring device 30 , and the moving device 40 .

[0070] By providing the housing 70, foreign matter can be prevented from damaging the distance measuring device 30 or the battery cell to be detected, thereby improving the safety of the warping detection device 10. In addition, by providing the housing 10, the problem of reduced detection accuracy caused by external light sources or other factors can be reduced.

[0071] The housing 70 may be made of metal, plastic or glass, and the present invention does not impose any specific restrictions on this.

[0072] The housing 70 may be provided with an openable and closable door to facilitate the placement and removal of the battery cells to be tested.

[0073] The housing 70 may completely cover the testing platform 20 , or the housing 70 may partially cover the testing platform 20 , and the present invention does not impose any specific limitation on this.

[0074] The housing 70 can be configured as a semi-enclosed type, a hollow type, or a fully enclosed type, and the present invention does not impose any restrictions on this.

[0075] In some optional embodiments, the moving device 40 is connected to the distance measuring device 30 and is used to drive the distance measuring device 30 to move in the second direction, while the battery cell to be detected remains stationary. The moving device 40 may include:

[0076] The first guide rail 401 is parallel to the second direction and is arranged opposite to the battery cell to be tested along the first direction;

[0077] The moving component 402 is connected to the first guide rail 401 and extends along the third direction. It is used to carry the multiple distance measuring devices 30 and move along the first guide rail 401 in the second direction.

[0078] In some embodiments, the first guide rail 401 can be configured as a linear guide rail.

[0079] The first guide rail 401 and the detection platform 20 are arranged opposite to each other in the first direction, and the spacing distance can be 20 centimeters (cm), 30 cm or 50 cm. Of course, it can also be other distances, and the present invention does not impose specific limitations on this.

[0080] The first guide rail 401 may be a sliding guide rail or a rolling guide rail. For example, the first guide rail 401 may be configured as a conveyor belt for conveying the distance measuring device 30 . The present invention does not impose any specific limitation on this.

[0081] The number of the first guide rails 401 can be one, or the number of the first guide rails 401 can also be two. The number of the first guide rails can also be reasonably set according to the number of the ranging devices 30. For example, when two five ranging devices 30 are set, the two first guide rails 401 drive the five ranging devices to move in the second direction. The present invention does not impose any specific restrictions on this.

[0082] When the number of the first guide rail 401 is one, the number of the first guide rail 401 can be reduced, thereby reducing the cost of the detection device 1010 .

[0083] When there are two first guide rails 401, there are also two moving parts 402. The two moving parts 402 jointly carry multiple distance measuring devices 30, thus preventing damage to the moving part 402 caused by a single moving part 402 carrying multiple distance measuring devices 30, thereby improving the durability of the testing device 10. Based on this optional embodiment, by providing the first guide rails 401 and the moving parts 402, since the moving parts 402 are connected to the first guide rails 401, carry multiple distance measuring devices 30, and move along the first guide rails 401, they can drive the distance measuring devices 30 to move relative to the battery cell to be tested, thereby measuring the distance between the distance measuring devices 30 and multiple positions of the battery cell to be tested.

[0084] The present invention can drive the distance measuring device 30 to move in the second direction to automatically detect the battery cell to be detected by providing the first guide rail 401, and no longer relies on manual detection, thereby improving the accuracy and efficiency of determining the warpage.

[0085] In some optional embodiments, the moving component 402 includes:

[0086] A carrying portion 4021 for carrying a plurality of distance measuring devices 30;

[0087] The first moving component 4022 connects the first guide rail 401 and the carrying portion 4021 , and the first moving component 4022 drives the carrying portion 4021 to move along the first guide rail 401 in the second direction.

[0088] It should be noted that, in this optional embodiment, the arrangement length of the multiple distance measuring devices 30 is greater than or equal to a preset value.

[0089] The present invention does not impose any specific restrictions on the arrangement of multiple distance measuring devices 30 on the bearing portion 4021, or the arrangement of multiple distance measuring devices 30 on the bearing portion 4021 is arranged in two rows, or the arrangement of multiple distance measuring devices 30 on the bearing portion 4021 is arranged in three rows. In addition, the first movable component 4022 and the bearing portion 4021 can be configured as an integral structure or a split structure. For example, the first movable component 4022 and the bearing portion 4021 are connected to each other, and the connection method can be any one of threaded connection, riveting, welding, shaft-hub connection, plug-in connection, adhesive connection, hinge connection, and clamp connection. When the first movable component 4022 and the bearing portion 4021 are configured as an integral structure, they can be directly connected to the first guide rail 401, and the connection method is a movable connection.

[0090] The arrangement length of the plurality of distance measuring devices 30 is greater than or equal to a preset value. When the carrying surface of the detection platform 20 is rectangular, the preset value may be the length of any side of the carrying surface.

[0091] When the bearing surface of the testing platform 20 is circular, the preset value may be the diameter of the bearing surface.

[0092] In some embodiments, a ball bearing is provided on the first movable component 4022, and the first movable component 4022 can roll on the first guide rail 401 through the ball bearing, so as to drive the bearing part 4021 to move in the moving plane through the first guide rail 401, or, a lubricant is applied to the guide groove of the first movable component 4022 and the first guide rail 401. Due to the lubrication of the lubricant, the first movable component 4022 can slide on the first guide rail 401, so as to drive the bearing part 4021 to move in the moving plane through the first guide rail 401. The present invention does not impose any specific restrictions on this.

[0093] In some embodiments, the first movable part 4022 and the carrying part 4021 may be provided with mutually cooperating buckles, and the first movable part 4022 drives the carrying part 4021 to move within the moving plane through the buckle, or a groove may be provided on the first movable part 4022, and a protrusion may be provided on the carrying part 4021, and the protrusion of the carrying part 4021 may be inserted into the groove of the first movable part 4022, so that the first movable part 4022 drives the carrying part 4021 to move within the moving plane, or the first movable part 4022 and the carrying part 4021 may also be bonded together so that the first movable part 4022 drives the carrying part 4021 to move within the moving plane, or the first movable part 4022 and the carrying part 4021 may also be integrally formed so that the first movable part 4022 drives the carrying part 4021 to move within the moving plane. The utility model does not impose any specific restrictions on this.

[0094] The first movable component 4022 may be provided with a motor (not shown), and the motor drives the first movable component 4022 to move on the first guide rail 401 .

[0095] Based on this optional embodiment, the utility model drives the carrying part 4021 to move in the second direction along the first guide rail 401 through the first movable part 4022, so that the distance measuring device 30 carried by the carrying part 4021 can be moved along the guide rail to detect the battery cell to be detected. A small number of distance measuring devices 30 can be set to realize the detection of multiple battery cells to be detected. There is no need to fixedly set up multiple distance measuring devices 30 to detect the battery cells to be detected, which can save the cost of setting up the distance measuring device 30 and improve the detection efficiency.

[0096] Figure 2 A structural diagram of another detection device 10 provided by the present invention is shown as follows: Figure 2 As shown, in the detection device 10 provided by the present invention, the moving component 402 further includes:

[0097] The second movable component 4023 connects the first movable component 4022 and the carrying portion 4021 , and the second movable component 4023 drives the carrying portion 4021 to move along the third direction.

[0098] Since the arrangement length of multiple distance measuring devices 30 is less than a preset value, by setting a second movable component 4023, the second movable component 4023 is connected to the first movable component 4022 and the carrying part 4021, and the second movable component 4023 drives the carrying part 4021 to move along the third direction within the moving plane, the distance measuring device 30 can be moved along the target direction (second direction) within the moving plane, so that fewer distance measuring devices 30 can be used to measure multiple distances between the battery cells to be tested on the testing table 20, thereby reducing the cost of warpage detection and improving the flexibility of warpage detection.

[0099] In some optional embodiments, the second movable component 4023 is a telescopic device.

[0100] It should be noted that the telescopic device can be a hydraulic telescopic rod, or a spring telescopic rod, and the present invention does not impose any specific restrictions on this.

[0101] Based on this optional embodiment, since the telescopic device can be telescoped, it is possible to realize a solution of driving the carrying portion 4021 to move along the target direction within the moving plane.

[0102] The present invention provides a second movable component 4023 to drive the carrying part 4021 to move along the third direction. The distance measuring device 30 can be moved to a suitable position in the third direction by moving the carrying part 4021 to detect the distance. At this time, a small number of distance measuring devices 30 are provided in the third direction to detect each point to be detected of the battery cell to be detected in the third direction.

[0103] Figure 3 A structural diagram of another detection device 10 provided by the present invention is shown as follows: Figure 3 As shown, in the detection device 10 provided by the present invention, the mobile device 40 further includes:

[0104] The second guide rail 403 is parallel to the third direction. The second moving component 4023 cooperates with the second guide rail 403 to drive the distance measuring device 30 to move along the third direction.

[0105] The second movable part 4023 is provided with a ball bearing, and the second movable part 4023 can roll on the second guide rail 403 through the ball bearing to drive the bearing part 4021 to move within the moving plane, or the second movable part 4023 and the guide groove of the second guide rail 403 are coated with lubricant. Due to the lubrication of the lubricant, the second movable part 4023 can slide on the second guide rail 403 to drive the bearing part 4021 to move within the moving plane. The present invention does not impose any specific restrictions on this.

[0106] The second movable part 4023 and the carrying part 4021 can be provided with mutually cooperating buckles, and the second movable part 4023 drives the carrying part 4021 to move within the moving plane through the buckle, or the second movable part 4023 can be provided with a groove, and the carrying part 4021 can be provided with a protrusion, and the protrusion of the carrying part 4021 can be inserted into the groove of the second movable part 4023, so that the second movable part 4023 drives the carrying part 4021 to move within the moving plane, or the second movable part 4023 and the carrying part 4021 can also be bonded together so that the second movable part 4023 drives the carrying part 4021 to move within the moving plane, or the second movable part 4023 and the carrying part 4021 can also be integrally formed so that the second movable part 4023 drives the carrying part 4021 to move within the moving plane. The utility model does not impose specific restrictions on this.

[0107] The second movable component 4023 may be provided with a motor, and the motor drives the second movable component 4023 to move on the second guide rail 403 .

[0108] Figure 4 A schematic diagram of the structure of another detection device 10 provided by the present invention is shown in FIG. Figure 4 As shown, in the detection device 10 provided by the present invention, the mobile device 40 includes:

[0109] A moving part 402 carrying a plurality of distance measuring devices.

[0110] The robotic arm 404 is connected to the moving component 402, and the robotic arm 404 drives the moving component 402 to move within the moving plane.

[0111] Based on this solution, since the mobile device 40 includes a mobile component 402 carrying multiple distance measuring devices 30, and a robotic arm 404, the robotic arm 404 is connected to the mobile component 402, and the robotic arm 404 drives the mobile component 402 to move within a moving plane, the robotic arm 404 can drive the distance measuring device 30 carried by the mobile component 402 to move within a moving plane parallel to the detection table 20, and measure multiple distances between the battery cells to be detected on the detection table 20, so that the warping or surface contour of the battery cells to be detected can be detected, and manual detection is no longer relied upon, thereby improving the accuracy and efficiency of the determined warping.

[0112] In some embodiments, the processor 50 is specifically configured to:

[0113] Calculating the difference between the distance in the first direction between at least one distance measuring point in the distance measuring device 30 and a target point to be inspected corresponding to the cell to be inspected, and the smallest distance in the first direction between at least one distance measuring point in the distance measuring device 30 and a detection point on the surface of the cell to be inspected, and determining the warpage of the surface of the cell to be inspected based on the one or more differences; or

[0114] The surface profile of the cell to be inspected is determined by a plurality of detection distances in the first direction between at least one distance measuring point in the distance measuring device 30 and a point to be inspected corresponding to the cell to be inspected.

[0115] The utility model can accurately calculate the warping degree of the battery cell to be detected based on the difference between the distance of the target detection point obtained by calculation and the minimum distance, and when multiple detection distances can be detected, the surface contour of the battery cell to be detected can also be inferred, thereby realizing comprehensive detection of the battery cell to be detected.

[0116] When the cell to be inspected is a cell and the warpage of the cell needs to be calculated, it can be measured by the distance measuring device 30. When the distance measuring device 30 is located at the four corners, the vertical distance between the distance measuring probe and the corner of the cell in the first direction is measured and compared with the minimum distance in the first direction from at least one distance measuring point in the distance measuring device 30 to the detection point on the surface of the cell to be inspected. When the distance measuring device 30 is located at a position relative to the detection point in the first direction of the center of the cell, the vertical distance generally detected is the smallest. At this time, this distance can be used as the minimum distance. The minimum distance is the point closest to the laser matrix among all the points. The warpage of the cell can be determined based on the comparison of the two distances. The specific scheme of the processor 50 determining the target warpage of the cell to be inspected based on multiple distances can refer to the existing scheme, and the present invention will not be described in detail here. In addition, when it is necessary to detect the surface contour of the cell, multiple distance measuring devices 30 corresponding to the size range of the cell can be set based on the size of the cell. By setting multiple distance measuring devices 30, the contour of the cell and whether warping has occurred can be determined based on the results obtained by the detection.

[0117] In some embodiments, the cell has a first surface and a second surface relatively arranged in a first direction. It can be understood that the first surface and the second surface can be the light-facing surface (the front of the cell) and the backlight surface (the back of the cell) of the cell, respectively. The light-facing surface is the side of the solar cell formed by the cell facing the sun when working, and the backlight surface is the side of the solar cell formed by the cell facing away from the sun when working.

[0118] In some embodiments, a distance measuring device 30 may be set at a position opposite to the front side of the battery cell to detect the warping or surface contour of the battery cell surface, or a distance measuring device 30 may be set at a position opposite to the back side of the battery cell to detect the warping or surface contour of the back side of the battery cell, or a distance measuring device 30 may be set on both the front and back sides of the battery cell to detect the warping or surface contour of the entire battery cell.

[0119] As an example, the distance measuring device 30 may include multiple, for example, four, distance measuring devices 30, with two distance measuring devices 30 detecting the front side of the cell and the other two distance measuring devices 30 detecting the back side of the cell. As another example, the distance measuring device 30 may include five distance measuring devices 30, with two distance measuring devices 30 detecting the front side of the cell and the other three distance measuring devices 30 detecting the back side of the cell. The specific method for calculating the warpage or surface profile of the cell surface mentioned above is an example of when the distance measuring device 30 is positioned relative to the front side of the cell. It is understandable that when the distance measuring device 30 is positioned relative to the back side of the cell, the warpage of the cell surface to be detected can be determined based on one or more differences by calculating the difference between the distance in the first direction between at least one distance measuring point in the distance measuring device 30 and a target detection point corresponding to the cell to be detected and the maximum distance in the first direction between at least one distance measuring point in the distance measuring device 30 and detection points on the surface of the cell to be detected.

[0120] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the surface profile or warpage of a battery cell, characterized in that: include: A distance measuring device, the distance measuring device is arranged relative to the battery cell to be detected along a first direction, and the distance measuring device is used to measure the distance between at least one distance measuring point in the distance measuring device and a point to be detected corresponding to the battery cell to be detected in the first direction; A moving device drives at least one of the distance measuring device or the battery cell to be detected to move in a second direction, wherein the first direction is perpendicular to the second direction.

2. The detection device according to claim 1, characterized in that The moving device is connected to the distance measuring device and is used to drive the distance measuring device to move in the second direction, and the battery cell to be detected remains stationary. The moving device also includes: A first guide rail, parallel to the second direction and arranged opposite to the battery cell to be tested along the first direction; A moving component is connected to the first guide rail and extends along the third direction, is used to carry the multiple distance measuring devices, and moves along the first guide rail in the second direction.

3. The detection device according to claim 2, characterized in that The moving parts specifically include: A carrying portion for carrying a plurality of the distance measuring devices; The first moving component connects the first guide rail and the bearing portion, and drives the bearing portion to move along the first guide rail in the second direction through the first moving component.

4. The detection device according to claim 3, characterized in that The moving part also includes: The second moving component connects the first moving component and the carrying portion, and the second moving component drives the carrying portion to move along the third direction.

5. The detection device according to claim 4, characterized in that The second moving component is a telescopic device.

6. The detection device according to claim 4, characterized in that: The mobile device component also includes: The second guide rail is parallel to the third direction, and the second moving component cooperates with the second guide rail to drive the distance measuring device to move along the third direction.

7. The detection device according to claim 1, characterized in that The mobile device comprises: A moving component carrying a plurality of said distance measuring devices; The mechanical arm is connected to the moving part, and the mechanical arm drives the moving part to move within a moving plane.

8. The detection device according to any one of claims 1 to 7, characterized in that: The distance measuring device is at least one of a laser rangefinder, an ultrasonic rangefinder, an infrared rangefinder, and a radar sensor.

9. The detection device according to any one of claims 1 to 7, characterized in that: The detection device also includes: The shell is used to cover the battery cell to be detected, the distance measuring device, and the mobile device.

10. The detection device according to claim 1, characterized in that The device further includes a detection platform, a processor connected to the distance measuring device, and a display connected to the processor. The detection platform is used to carry the battery cell to be detected, and the display is used to display the detection result of the distance measuring device.

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