Gap calibration device and method

Abstract

The invention belongs to the technical field of gap calibration, and discloses a gap calibration device and method. The gap calibration device comprises a limiting assembly, a profiling block, a gap adjusting piece and a displacement conversion mechanism. The profiling block is arranged in a containing cavity formed by the shell and the top cover, and a groove is formed in the profiling block; the gap adjusting piece is located in the groove and is adjustably connected to the profiling block in the first direction; the displacement conversion mechanism comprises an abutting piece, a displacement amplification assembly and a lifting piece, the abutting piece is at least partially arranged in the groove and rotationally connected to the profiling block, the abutting piece abuts against the side, away from the limiting assembly, of the first wall, the displacement amplification assembly is fixedly connected with the abutting piece, and the displacement amplification assembly is movably arranged in the groove; the lifting part is connected to the displacement amplification assembly, a sliding hole extending in the second direction is formed in the top cover, and one end of the lifting part penetrates through the sliding hole. The gap calibration device and method provided by the invention have relatively high gap calibration accuracy.

Description

Technical Field

[0001] This invention relates to the field of gap calibration technology, and in particular to a gap calibration device and method. Background Technology

[0002] A battery cell typically includes a casing, a top cover, and a battery cell. The top cover is located at the opening of the casing, and the battery cell is located in the cavity formed by the casing and the top cover.

[0003] In related technologies, after the battery cell is placed inside the casing, the casing and top cover are connected by welding. Specifically, the casing and top cover are clamped together using a clamping device, and then the seam is welded between them. However, when the gap between the casing and top cover is large (e.g., exceeding 0.05mm), during the welding process, the laser can penetrate through the gap and enter the battery cell, causing damage and, in severe cases, short circuits. Therefore, the gap between the casing and top cover needs to be detected before welding. Currently, a 3D profilometer is used to detect the gap; however, the application of the 3D profilometer to detecting the gap between the casing and top cover needs calibration to ensure the accuracy of the measurement. However, the calibration methods for using 3D profilometers to detect the gap between the casing and top cover in related technologies have low accuracy. Summary of the Invention

[0004] The first objective of this application is to provide a gap calibration device to solve the technical problem of low accuracy in calibration methods in related technologies.

[0005] The second objective of this application is to provide a gap calibration method that is easy to operate and has high accuracy.

[0006] Based on the above concept, the technical solution adopted in this application is:

[0007] A gap calibration device for calibrating the gap between the top cover of the battery and the first wall of the outer casing, the gap calibration device comprising:

[0008] A limiting component is provided on the side of the housing opposite to the top cover and is used to apply a compressive force to the housing;

[0009] A contoured block is disposed within the accommodating cavity formed by the outer shell and the top cover. The contoured block is provided with a groove, and the groove has openings on both the side facing the first wall and the side facing the top cover.

[0010] A gap adjusting member is located in the groove and is adjustablely connected to the contour block along a first direction, so that the gap adjusting member can abut against the first wall; the first direction is the wall thickness direction of the first wall;

[0011] The displacement conversion mechanism includes an abutment, a displacement amplification component, and a lifting component. The abutment is at least partially disposed in the groove and rotatably connected to the contour block. The abutment abuts against the side of the first wall away from the limiting component. The displacement amplification component is fixedly connected to the abutment and is movably disposed within the groove. The lifting component is connected to the displacement amplification component. The top cover has a sliding hole extending along a second direction, and one end of the lifting component passes through the sliding hole. The second direction is the thickness direction of the top cover.

[0012] In one or more embodiments of this application, the displacement amplification assembly includes a gear, a transmission component, and a first shaft. The gear is fixedly connected to the abutment component and is rotatably connected to the contour block. The first shaft is disposed in the groove and connected to the contour block. The transmission component is rotatably sleeved on the first shaft. The lifting component is provided with a rack portion. One end of the transmission component meshes with the gear, and the other end of the transmission component meshes with the rack portion.

[0013] In one or more embodiments of this application, the transmission member includes a first transmission end and a second transmission end disposed opposite to each other, the first transmission end meshing with the gear, the second transmission end meshing with the rack portion, and the distance between the first shaft and the first transmission end being less than the distance between the first shaft and the second transmission end.

[0014] In one or more embodiments of this application, the displacement amplification component further includes an elastic element; the elastic element is disposed between the lifting member and the contour block, and the extension direction of the elastic element is the second direction, and the elastic element is used for resetting the lifting member.

[0015] In one or more embodiments of this application, the gap calibration device further includes a differential member extending along the first direction. The differential member has a first threaded segment and a second threaded segment. The first threaded segment is screwed onto the contour block, and the second threaded segment is screwed onto the gap adjusting member. The pitch of the first threaded segment is smaller than the pitch of the second threaded segment.

[0016] In one or more embodiments of this application, the gap adjusting member has a scale surface, the scale surface is provided with a first scale, the scale surface is provided with a screw hole, the differential member is screwed into the screw hole, and the end face of the differential member corresponding to one end of the scale surface is provided with a second scale.

[0017] In one or more embodiments of this application, the top cover is provided with a notch, and the gap adjusting member is provided with an extension located at the notch, wherein the surface of the extension away from the bottom wall of the outer shell is flush with the surface of the top cover away from the contour block;

[0018] And / or, the limiting component has a first surface and a second surface disposed opposite to each other in the second direction, the second surface being closer to the bottom wall of the housing than the first surface, and the surface of the gap adjusting member facing away from the top cover being closer to the bottom wall of the housing in the second direction than the second surface.

[0019] In one or more embodiments of this application, the grooves are provided in multiple ways, the multiple grooves are divided into multiple slot groups, and the multiple slot groups are spaced apart in the length direction of the top cover;

[0020] Each of the slot groups includes two spaced-apart grooves, and each groove contains a gap adjustment element and a displacement conversion mechanism.

[0021] In one or more embodiments of this application, the portion of the top cover located between the two grooves of the slot group is a gap measuring part. The top cover includes a plurality of gap measuring parts. The limiting component includes a plurality of limiting blocks corresponding one-to-one with the plurality of gap measuring parts. The orthographic projection of the limiting block on the first wall along the first direction is a first orthographic projection. The orthographic projection of the gap measuring part corresponding to the limiting block on the first wall along the first direction is a second orthographic projection. The first orthographic projection covers the second orthographic projection.

[0022] The orthographic projection of the gap adjusting member in the groove on one side of the gap measuring part corresponding to the limiting block along the first direction onto the first wall is a third orthographic projection. The orthographic projection of the gap adjusting member in the groove on the other side of the gap measuring part corresponding to the limiting block along the first direction onto the first wall is a fourth orthographic projection. The first orthographic projection and the third orthographic projection at least partially overlap.

[0023] The gap calibration method, applied to the aforementioned gap calibration device, includes the following steps:

[0024] S1. Adjust the gap adjusting member to the first position so that the abutting member abuts against the first wall, the lifting member protrudes from the top surface of the top cover, and measure the first distance H1 between the end face of the lifting member away from the displacement amplification component and the top surface of the top cover.

[0025] S2. Adjust the gap adjusting member to the second position so that the abutting member abuts against the first wall, the lifting member protrudes from the top surface of the top cover, and measure the second distance H2 between the end face of the lifting member away from the displacement amplification component and the top surface of the top cover.

[0026] S3. Determine the actual gap value between the gap measuring part of the first wall and the top cover based on the first distance H1 and the second distance H2;

[0027] S4. Calibrate the gap measurement value based on the actual gap value.

[0028] In one or more embodiments of this application, multiple grooves are provided, the multiple grooves are divided into multiple groove groups, the multiple groove groups are spaced apart in the length direction of the top cover, and the portion located between two grooves in the groove group is a gap measuring part;

[0029] In step S1, the gap adjusting members in at least two adjacent grooves belonging to the same groove group are adjusted to be located in the first position; in step S2, the gap adjusting members in at least two adjacent grooves belonging to the same groove group are adjusted to be located in the second position.

[0030] Step S3 includes the following steps:

[0031] S31. Determine the actual gap value on one side of the gap measuring unit based on the first distance H1 and the second distance H2 on the third-direction upward side of the gap measuring unit, and record it as the first actual gap value G. s1 The third direction is perpendicular to both the first direction and the second direction.

[0032] S32. Determine the actual gap value on the other side of the gap measuring unit based on the first distance H1 and the second distance H2 on the other side of the third direction, and record it as the second actual gap value G. s2 ;

[0033] S33, Based on the first actual gap value G s1 Second actual gap value G s2 Determine the actual gap value between the gap measurement point of the gap measurement unit and the first wall.

[0034] In one or more embodiments of this application, the second actual gap value G s2 Greater than the first actual gap value G s1 Step S33 includes the following steps:

[0035] S331. Determine the distance between two adjacent abutting members on both sides of the same gap measuring part in the third direction in the third direction, and denot it as the first gap A1;

[0036] S332. Determine the gap measurement point and the first actual gap value G. s1 The distance between the corresponding abutment and the third-party direction is denoted as the second spacing A2;

[0037] S333, based on the first spacing A1, the second spacing A2, and the first actual gap value G s1 And the second actual gap value G s2 The actual gap value between the gap measurement point and the first wall is determined and denoted as G. s3 , among which, (G s3 -G s1 ) / (G s2 -G s1 = (A1-A2) / A1.

[0038] In one or more embodiments of this application, in step S1, the limiting component is controlled to apply a pressing force to the housing so that the first wall abuts against the gap adjusting member, and the distance between the gap adjusting member and the first wall in a first direction is greater than the distance between the gap measuring part and the first wall in the first direction;

[0039] Before step S2, adjust the limiting component to separate from the housing, and remove the contour block from the housing;

[0040] In step S2, after adjusting the gap adjusting member to the second position, the contour block is installed into the housing, and the distance between the gap measuring part and the first wall in the first direction is greater than the distance between the gap adjusting member and the first wall in the first direction;

[0041] After step S2, the limiting component is controlled to apply a compressive force to the housing so that the first wall abuts against the gap adjusting member.

[0042] In one or more embodiments of this application, the gap calibration device further includes a differential component, and the amplification factor of the displacement amplification component is n;

[0043] In step S1, after the abutting member abuts against the first wall, the distance between the gap adjusting member and the first wall in the first direction is measured and recorded as the third distance L1.

[0044] Step S2 includes the following steps:

[0045] S21, Provides a preset gap value G y ;

[0046] S22, According to the preset gap value G y And the third distance L1, to determine the rotation angle of the differential;

[0047] S23. Rotate the differential according to the rotation angle of the differential, and the differential drives the gap adjusting member to move relative to the contour block until the gap adjusting member is located in the second position;

[0048] In step S3, the fourth distance L2 of the movement of the abutment in the first direction is determined according to the formula L2=(H2-H1) / n, and the actual gap value between the gap measuring part of the first wall and the top cover is determined according to the fourth distance L2.

[0049] In one or more embodiments of this application, the first scale and the second scale are both divided into m divisions; the pitch of the first threaded section of the differential is P1, and the pitch of the second threaded section is P2;

[0050] Step S22 includes the following steps:

[0051] S221. Determine the adjustment accuracy K of the differential, where K = (P2 - P1) / m;

[0052] S222, based on the preset gap value G y The third distance L1 and the adjustment accuracy K determine the number of rotation intervals d of the differential, where d = (G y +L1) / K.

[0053] The beneficial effects of this application are:

[0054] The gap calibration device and method provided in this application can mimic the battery cell by setting a contour block, construct a gap between the top cover and the first wall of the outer casing by setting a gap adjustment component, and convert the gap into a height difference in a second direction by setting a displacement conversion mechanism, thereby accurately measuring the true value of the gap. The measured value of the gap is calibrated using the true value of the gap, thereby achieving the calibration of the gap measurement value. The measured value of the gap between the top cover and the outer casing of the real battery is adjusted according to the calibration results, thereby obtaining a more accurate gap value, making the corrected gap value closer to the true value. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of the gap calibration device provided in the embodiments of this application;

[0057] Figure 2 This is a first exploded structural diagram of the gap calibration device provided in the embodiments of this application;

[0058] Figure 3 This is a second exploded view of the gap calibration device provided in the embodiments of this application;

[0059] Figure 4 This is a schematic diagram of the gap adjusting component and displacement conversion mechanism provided in the embodiments of this application;

[0060] Figure 5 This application Figure 4 An exploded view of the structure shown;

[0061] Figure 6 This is a first cross-sectional view of the gap calibration device provided in the embodiments of this application;

[0062] Figure 7 This application Figure 6 The enlarged view of point A shown;

[0063] Figure 8 This is a second cross-sectional view of the gap calibration device provided in the embodiments of this application;

[0064] Figure 9 This is a schematic diagram of the structure of the contouring component provided in the embodiments of this application;

[0065] Figure 10 This is a schematic diagram of the gap adjusting component provided in the embodiments of this application;

[0066] Figure 11 This is a top view of the gap calibration device provided in the embodiments of this application;

[0067] Figure 12 This is a flowchart of the gap calibration method provided in the embodiments of this application;

[0068] Figure 13 This is a partial enlarged view of the gap calibration device provided in the embodiment of this application when the gap adjusting member is in the first position;

[0069] Figure 14 This is a partial enlarged view of the gap calibration device provided in the embodiment of this application when the gap adjusting member is in the second position.

[0070] Explanation of reference numerals in the attached figures:

[0071] 1. Limiting component; 11. First surface; 12. Second surface; 13. Limiting block; 2. Contouring block; 20. Groove group; 21. Groove; 211. Groove opening; 212. Deep groove; 213. Shallow groove; 22. Limiting cavity; 221. Upper cavity wall; 222. Lower cavity wall; 23. Perforation; 24. Guide block; 3. Gap adjustment component; 31. Extension; 32. Scale surface; 33. First scale; 34. Screw hole; 35. Guide groove; 4. Displacement conversion mechanism; 41. Abutment component; 411. Arc-shaped part; 412. Connecting part; 413. Positioning part; 42. Displacement amplification component; 421. Gear; 422. Transmission component; 4221. First transmission end; 4222. Second transmission end; 423. First shaft; 424. Elastic component; 43. Lifting component; 431. Rack section; 432. Guide section; 433. Convex ring component; 44. Second shaft; 5. Differential component; 51. First threaded section; 52. Second threaded section; 53. Second scale; 6. Connecting block; 61. Slot; 7. Upper reference plate; 100. Top cover; 1001. Notch; 1002. Sliding hole; 1003. Gap measuring section; 200. Outer shell; 2001. First wall; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0072] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0073] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0074] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0075] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0076] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0077] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0078] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0079] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0080] This embodiment provides a gap calibration device for offline calibration of the gap value between the top cover and the outer casing of a battery. Then, based on the calibration results, the measurement results of the gap measuring component are optimized so that the gap measuring component has high accuracy and precision when measuring the gap value between the top cover and the outer casing of the battery in actual online production.

[0081] It should be noted that the gap measuring component can be a 3D profilometer, or other components capable of distance measurement; this embodiment is not limited to any particular type. It should also be noted that the gap between the top cover and the outer shell refers to the gap between the side edge of the top cover and the inner wall of the outer shell.

[0082] For example, such as Figures 1 to 11 As shown, the gap calibration device includes a limiting component 1, a contour block 2, a gap adjusting component 3, and a displacement conversion mechanism 4. In this embodiment, the gap measuring component is used to measure the gap between the top cover 100 of the battery and the first wall 2001 of the outer casing 200, and the gap calibration device is used to calibrate the gap between the top cover 100 and the first wall 2001 of the outer casing 200.

[0083] In some embodiments, such as Figure 1 As shown, the limiting component 1 is located on the side of the outer casing 200 away from the top cover 100 and is used to apply a compressive force to the outer casing 200 so that the outer casing 200 can move in a direction close to the top cover 100 and can tightly abut against the top cover 100 or the gap adjusting block. By setting the limiting component 1, the relative position of the top cover 100 and the outer casing 200 can be kept unchanged during the measurement process, thereby ensuring the accuracy of the measurement.

[0084] In some embodiments, such as Figure 1 As shown, the limiting component 1 may include multiple limiting blocks 13, which are spaced apart to apply external force to the housing 200 at different positions. At this time, driving components such as cylinders and linear motors drive the limiting blocks 13 to apply compressive force to the housing 200. For example, the limiting component 1 may be a positioning device used when welding the top cover 100 and the housing 200; this embodiment does not limit this.

[0085] In other embodiments, the limiting component 1 may also be an integral part, but this embodiment does not limit it in this way.

[0086] In this embodiment, the contour block 2 is disposed within the cavity formed by the outer casing 200 and the top cover 100 to mimic the shape of the battery cell. This makes the gap between the outer casing 200 and the top cover 100 closer to the gap between the outer casing 200 and the top cover 100 in a real battery, avoiding the problem of large measurement errors caused by the absence of an object inside the outer casing 200. The shape, size, and weight of the contour block 2 can all be close to those of the battery cell, thereby reducing the risk of measurement errors.

[0087] In some embodiments, such as Figure 3As shown, the contour block 2 is provided with a groove 21, which is used to accommodate the gap adjustment member 3 and the displacement conversion mechanism 4. In this embodiment, the groove 21 has slots 211 on both the side facing the first wall 2001 and the side facing the top cover 100. That is, the groove 21 extends to the surface of the contour block 2 facing the first wall 2001 and the surface facing the top cover 100, so as to avoid interfering with the movement of other components. By providing the groove 21, the contour block 2 can provide space to accommodate the gap adjustment member 3 and the displacement conversion mechanism 4, which is beneficial for limiting the position of the gap adjustment member 3 and the displacement conversion mechanism 4.

[0088] like Figure 2 and Figure 3 As shown, the gap adjusting member 3 is located in the groove 21, and is adjustablely connected to the contour block 2 along the first direction X, so that the position of the gap adjusting member 3 relative to the contour block 2 in the first direction X is adjustable, thereby facilitating the construction of a gap between the top cover 100 and the outer shell 200. When the gap adjusting member 3 moves in the first direction X, it can abut against the first wall 2001, thus having a state of abutting against the first wall 2001. Alternatively, when the gap adjusting member 3 moves in the first direction X, it can also have a gap between it and the first wall 2001, thus having a state of moving away from the first wall 2001. There are various ways in which the position of the gap adjusting member 3 relative to the contour block 2 can be adjusted, and this embodiment does not limit this.

[0089] It should be noted that the first direction X is the wall thickness direction of the first wall 2001. For example, the first wall 2001 can be a sidewall in the width direction of the outer shell 200, in which case the first direction X is the width direction of the outer shell 200. Of course, it can be understood that the first wall 2001 can also be a sidewall in the length direction of the outer shell 200, in which case the first direction X is the length direction of the outer shell 200. This embodiment does not limit this. The accompanying drawings in this embodiment use the example of the first direction X being the width direction of the outer shell 200 for illustration. The case where the first direction X is the length direction of the outer shell 200 can be referred to in this embodiment and will not be described in detail.

[0090] For example, such as Figure 3As shown, the top cover 100 has a notch 1001, which can be located at the edge of the top cover 100 corresponding to the first wall 2001. The gap adjusting member 3 has an extension 31 located in the notch 1001, that is, the gap adjusting member 3 extends at least partially into the notch 1001 to form the extension 31. When the gap adjusting member 3 moves along the first direction X, the extension 31 moves along the first direction X in the notch 1001, thereby achieving contact or spacing between the extension 31 and the first wall 2001. By providing the extension 31, the top cover 100 does not need to reserve a large space for the gap adjusting member 3, thus making the structure of the top cover 100 more complete and the strength of the top cover 100 closer to that of a real top cover 100, so as to better simulate a real top cover 100 and thus ensure the accuracy of calibration.

[0091] In at least one implementation, such as Figure 3 and Figure 4 As shown, the displacement conversion mechanism 4 includes an abutment member 41, a displacement amplification component 42, and a lifting component 43. The abutment member 41 is at least partially disposed in the groove 21 and rotatably connected to the contour block 2. The abutment member 41 abuts against the side of the first wall 2001 away from the limiting component 1; that is, the abutment member 41 and the limiting component 1 are disposed opposite each other on opposite sides of the thickness direction of the first wall 2001. The displacement amplification component 42 is fixedly connected to the abutment member 41, so that when the abutment member 41 rotates relative to the contour block 2, the displacement amplification component 42 can also rotate relative to the contour block 2. Furthermore, the displacement amplification component 42 is movably disposed within the groove 21, and is used to amplify the displacement of the abutment member 41 in the second direction Y, thereby facilitating more accurate measurement. In this embodiment, the lifting component 43 is connected to the displacement amplification component 42. When the displacement amplification component 42 moves relative to the contour block 2, the lifting component 43 moves up and down in the first direction X. As shown in Figure 3, the top cover 100 is provided with a sliding hole 1002 extending along the second direction Y, and the sliding hole 1002 is disposed through the top cover 100 along the second direction Y. The end of the lifting member 43 facing away from the displacement amplification component 42 is movably inserted through the sliding hole 1002. Herein, the second direction Y is the thickness direction of the top cover 100 and also the height direction of the outer shell 200, that is, the second direction Y is perpendicular to the first direction X.

[0092] In this embodiment, the gap calibration device refers to the portion of the top cover 100 whose gap needs to be measured as the gap measuring part 1003. First, the gap adjusting member 3 is controlled not to abut against the first wall 2001, but rather the gap measuring part 1003 of the top cover 100 abuts against the first wall 2001. This abutment state between the gap measuring part 1003 and the first wall 2001 remains unchanged under the limiting component 1. At this time, the abutting member 41 abuts against the first wall 2001, causing the lifting member 43 to protrude a certain distance from the top cover 100. The distance by which the end face of the lifting member 43 protrudes from the top surface of the top cover 100 is then measured. Afterward, the gap adjusting member 3 is controlled to move in the first direction X, causing it to abut against the first wall 2001, forming a gap between the first wall 2001 and the gap measuring part 1003. Under the limiting component 1, the relative position of the first wall 2001 and the gap adjusting member 3 remains unchanged. Since the first wall 2001 is far away from the abutment 41 in the first direction X, the abutment 41 can rotate relative to the contour block 2 to continue abutting against the first wall 2001. The rotation of the abutment 41 relative to the contour block 2 is converted into the rise of the lifting member 43 in the second direction Y by the displacement amplification component 42, so that the top surface of the lifting member 43 protrudes from the top surface of the top cover 100 by another distance. Based on the two different distances that the top surface of the lifting member 43 protrudes from the top surface of the top cover 100, the gap value between the gap measuring unit 1003 and the first wall 2001 in the first direction X can be obtained. This gap value is the true gap value and has high accuracy and precision. Then, the gap value is measured using a 3D profiler or other gap measuring component. This gap value is the measured gap value. Then, the measured gap value is calibrated with the true gap value. In this way, the value of the 3D profiler or other gap measuring component when measuring the gap between the top cover 100 and the outer casing 200 of the actual battery can be calibrated, so that the gap value between the top cover 100 and the outer casing 200 can be obtained more accurately and precisely.

[0093] The gap calibration device provided in this embodiment can mimic the battery cell by setting the contour block 2, construct a gap between the top cover 100 and the first wall 2001 of the outer shell 200 by setting the gap adjustment component 3, and convert the gap into a height difference in the second direction Y by setting the displacement conversion mechanism 4. Thus, the true value of the gap can be accurately measured. The true value of the gap is used to calibrate the measured value of the gap, thereby calibrating the measured value of the gap. The measured value of the gap between the top cover 100 and the outer shell 200 of the real battery is adjusted according to the calibration, so as to obtain a more accurate gap value, making the corrected gap value closer to the true value.

[0094] In some alternative embodiments, such as Figure 3 and Figure 4As shown, the displacement amplification component 42 includes a gear 421, a transmission component 422, and a first shaft 423. The gear 421 is fixedly connected to the abutment component 41 and rotatably connected to the contour block 2. When the abutment component 41 rotates relative to the contour block 2, it drives the gear 421 to rotate synchronously. It should be noted that the rotation axis of the abutment component 41 coincides with the axis of the gear 421, thus ensuring that the rotation of the gear 421 does not occupy a large space. In one or more embodiments of this application, as... Figure 5 As shown, the abutting member 41 has an arc-shaped portion 411 that abuts against the first wall 2001 to improve the smoothness of the arc-shaped portion 411 sliding on the first wall 2001 and reduce the risk of jamming.

[0095] In some embodiments, the abutment member 41 further includes a connecting portion 412 and a positioning portion 413. The displacement conversion mechanism 4 further includes a second shaft 44. The gear 421 is fixedly sleeved on the second shaft 44. The connecting portion 412 of the abutment member 41 is fixedly sleeved on the second shaft 44. The positioning portion 413 is fixedly connected to the surface of the connecting portion 412 facing the gear 421. The gear 421 is provided with a positioning hole (not shown in the figure). The positioning portion 413 is inserted into the positioning hole for positioning and mounting the gear 421 and the abutment member 41. The arc-shaped portion 411 is fixedly connected to the connecting portion 412.

[0096] In this embodiment, the first shaft 423 is disposed within the groove 21 and fixedly connected to the contour block 2. The transmission member 422 is rotatably sleeved on the first shaft 423 and can rotate around the first shaft 423 as the rotation center. The lifting member 43 is provided with a rack portion 431. One end of the transmission member 422 meshes with the gear 421, and the other end of the transmission member 422 meshes with the rack portion 431. When the gear 421 rotates, it can drive the lifting member 43 to move in the second direction Y through the transmission member 422. By setting the gear 421 to mesh with the transmission member 422 and the rack portion 431 to mesh with the transmission member 422, the structure of the displacement amplification component 42 can be simplified, thereby reducing the structural complexity of the gap calibration device. Moreover, the meshing connection method has high connection reliability and reduces the risk of connection failure. It should also be noted that by setting gear 421 and rack 431, with rack 431 extending along the second direction Y, the distance that the abutment 41 moves in the first direction X can be converted into the distance that the lifting member 43 moves in the second direction Y through gear 421, rack 431 and transmission member 422, thereby facilitating the amplification and measurement of the moving distance.

[0097] In one or more embodiments of this application, such as Figure 5As shown, the transmission component 422 includes a first transmission end 4221 and a second transmission end 4222 disposed opposite to each other. The first transmission end 4221 meshes with a gear 421, and the second transmission end 4222 meshes with a rack portion 431. The distance between the first shaft 423 and the first transmission end 4221 is smaller than the distance between the first shaft 423 and the second transmission end 4222. With this configuration, the transmission component 422 forms a lever structure. When the first transmission end 4221 moves a small distance, the second transmission end 4222 can move a larger distance, thereby causing the lifting component 43 to move a greater distance in the second direction Y than the abutment component 41 moves a greater distance in the first direction X, thus achieving a better amplification effect. It should be noted that the distance between the first shaft 423 and the first transmission end 4221 is called the first lever arm, and the distance between the first shaft 423 and the second transmission end 4222 is called the second lever arm. The first lever arm is smaller than the second lever arm, and the displacement amplification factor is positively correlated with the ratio of the second lever arm to the first lever arm.

[0098] In at least one possible implementation, such as Figures 5 to 7 As shown, the displacement amplification assembly 42 also includes an elastic element 424. The elastic element 424 is located between the lifting member 43 and the contour block 2, and its extension direction is the second direction Y. The elastic element 424 is used for resetting the lifting member 43. By providing the elastic element 424, automatic resetting of the lifting member 43 can be achieved, improving the automation level of the gap calibration device.

[0099] It should be noted that the position of the lifting member 43 when the gap measuring part 1003 abuts against the first wall 2001 and the abutting part 41 abuts against the first wall 2001 can be considered as the original position. The reset of the lifting member 43 refers to the lifting member 43 being reset from other positions to the original position. This embodiment does not limit this. In other embodiments, the position of the lifting member 43 when the abutting part 41 is not abutting against the first wall 2001, that is, when the contour block 2 is not placed inside the outer casing 200, can also be considered as the original position. This embodiment does not limit this.

[0100] In some alternative embodiments, such as Figure 5 As shown, the lifting component 43 also includes a guide portion 432, and the bottom wall of the groove 21 is provided with a through hole 23 (as shown). Figure 9As shown in the diagram, a limiting cavity 22 is located below the through hole 23, and the groove 21 communicates with the limiting cavity 22 through the through hole 23. One end of the guide portion 432 is connected to the rack portion 431, and the other end passes through the through hole 23 and is located in the limiting cavity 22. The end of the guide portion 432 facing away from the rack portion 431 is connected to a protruding ring 433. An elastic member 424 is disposed in the limiting cavity 22 and sleeved on the guide portion 432. One end of the elastic member 424 abuts against the protruding ring 433, and the other end of the elastic member 424 abuts against the upper cavity wall 221 of the limiting cavity 22. When the lifting member 43 moves relative to the top cover 100 in the upward direction, the elastic member 424 is compressed. When the external force on the lifting member 43 disappears, the lifting member 43 is driven to descend under the action of the elastic member 424. The lowering limit of the lifting member 43 can be the abutment of the guide part 432 with the lower cavity wall 222 of the limiting cavity 22, or the abutment of the convex ring 433 with the lower cavity wall 222 of the limiting cavity 22, or the abutment of the rack part 431 with the bottom wall of the groove 21. That is, the cross-sectional dimension of the rack part 431 is larger than the cross-sectional dimension of the through hole 23. This embodiment does not limit this.

[0101] For example, the elastic element 424 can be a spring or other component capable of elastic deformation, and this embodiment does not limit this.

[0102] In some alternative embodiments, such as Figure 9 As shown, the groove 21 includes a deep groove 212 and a shallow groove 213. The gap adjusting member 3 is disposed in the deep groove 212, and the displacement conversion mechanism 4 is disposed in the shallow groove 213. The depth of the groove 21 is thus set according to the requirements, which facilitates the accommodation of the gap adjusting member 3 and the displacement conversion mechanism 4, and also facilitates the formation of the limiting cavity 22.

[0103] In one or more embodiments of this application, the gap adjusting member 3 can be adjusted in position to the contour block 2 via the differential member 5. For example... Figure 5 and Figure 8 As shown, the gap calibration device also includes a differential member 5, which extends along a first direction X, that is, the extension direction of the differential member 5 is the first direction X. The differential member 5 has a first threaded section 51 and a second threaded section 52. The first threaded section 51 is located at one end of the differential member 5, and the second threaded section is located at the other end of the differential member 5. The first threaded section 51 is screwed to the contour block 2, and the second threaded section 52 is screwed to the gap adjusting member 3. Furthermore, the pitch of the first threaded section 51 is smaller than the pitch of the second threaded section 52. This configuration enables precise control of the micrometer-level small displacement of the gap adjusting member 3. It should be noted that, assuming the pitch of the first threaded section 51 is P1 (in millimeters) and the pitch of the second threaded section 52 is P2 (in millimeters), when the differential member 5 rotates one revolution under the action of an external force, the relative displacement between the gap adjusting member 3 and the contour block 2 is (P2-P1) (in millimeters).

[0104] In some optional embodiments, the differential element 5 can be a differential screw, which can be provided with a hexagonal groove and can be rotated using a common Allen wrench.

[0105] In at least one embodiment, such as Figure 5 As shown, the gap adjusting member 3 has a scale surface 32, and the scale surface 32 is provided with a first scale 33. Furthermore, as... Figure 10 As shown, the scale surface 32 is provided with a screw hole 34, and the differential member 5 is screwed into the screw hole 34. The hexagonal groove of the differential screw is exposed through the screw hole 34 for easy operation. A second scale 53 is provided on the end face of the differential member 5 corresponding to one end of the scale surface 32 (that is, the end face of the differential member 5 exposed through the screw hole 34). By setting the first scale 33 and the second scale 53, the gap adjusting member 3 can be moved a preset distance, realizing the precise adjustment of the gap adjusting member 3. In this embodiment, both the first scale 33 and the second scale 53 are circular, and the number of scales on the first scale 33 and the second scale 53 are the same. The included angle between two adjacent scales is also the same. One scale on the first scale 33 can be aligned with any scale on the second scale 53 and is collinear. This facilitates the alignment of the scales and makes it easier to observe the number of rotations. It should be noted that both the first scale 33 and the second scale 53 have a 0 mark, so that the differential 5 can return to its initial position.

[0106] In some optional embodiments, the first scale 33 and the second scale 53 are both divided into m scales. In this case, the adjustment accuracy of the differential 5 is (P2-P1) / m, in millimeters.

[0107] In one or more embodiments of this application, such as Figure 9 and Figure 10 As shown, a guide block 24 is provided in the groove 21 of the contour block 2, and the differential member 5 is screwed to the guide block 24. The gap adjusting member 3 is provided with a guide groove 35. Both the guide block 24 and the guide groove 35 extend along the first direction X. The guide block 24 is slidably disposed in the guide groove 35 along the first direction X, so that the guide groove 35 guides the movement of the guide block 24, thereby guiding the movement of the gap adjusting member 3 to ensure the movement direction and movement stability of the gap adjusting member 3.

[0108] In some embodiments, the surface of the extension 31 facing away from the bottom wall of the housing 200 is flush with the surface of the top cover 100 facing away from the contour block 2. Furthermore, the limiting component 1 has a first surface 11 and a second surface 12 disposed opposite each other in the second direction Y. The second surface 12 is closer to the bottom wall of the housing 200 than the first surface 11. The position of the surface of the gap adjusting member 3 facing away from the top cover 100 in the second direction Y is closer to the bottom wall of the housing 200 than the second surface 12. This configuration ensures that the housing 200 has a large force-bearing area during the pressing process of the limiting component 1, thereby enabling the size of the gap formed by the gap measuring part 1003 and the first wall 2001 to be consistent in the second direction Y. This avoids the impact of different depths during gap testing on test consistency and improves calibration accuracy.

[0109] In other embodiments, the surface of the extension 31 away from the bottom wall of the outer casing 200 may be higher than the surface of the top cover 100 away from the contour block 2; this embodiment does not limit this.

[0110] In one or more embodiments of this application, such as Figure 9 As shown, the contour block 2 has multiple grooves 21. For example, the contour block 2 has multiple grooves 21 on both sides in the first direction X. The multiple grooves 21 located on the same side are divided into multiple slot groups 20, and the multiple slot groups 20 are spaced apart in the length direction of the top cover 100.

[0111] Please continue reading Figure 9 Each slot group 20 includes two grooves 21 spaced apart in the third direction Z, such as Figure 1 and Figure 2 As shown, each groove 21 is provided with a gap adjustment member 3 and a displacement conversion mechanism 4. It should be noted that the portion of the top cover 100 located between the two grooves 21 of each groove group 20 forms a gap measuring section 1003; that is, the top cover 100 has multiple gap measuring sections 1003 to enable gap measurement and calibration at different positions of the top cover 100. In this embodiment, the third direction Z is the length direction of the outer shell 200.

[0112] In some alternative embodiments, in the two grooves 21 of the same groove group 20, the abutment 41 of the displacement conversion mechanism 4 is disposed close to the gap measuring part 1003 between the two grooves 21 to further improve the accuracy of the value of the gap between the obtained gap measuring part 1003 and the first wall 2001.

[0113] In some optional embodiments, the top cover 100 includes a plurality of gap measuring portions 1003, and the limiting component 1 includes a plurality of limiting blocks 13 corresponding one-to-one with the plurality of gap measuring portions 1003. The orthographic projection of the limiting block 13 onto the first wall 2001 along the first direction X is a first orthographic projection, and the orthographic projection of the gap measuring portion 1003 corresponding to the limiting block 13 onto the first wall 2001 along the first direction X is a second orthographic projection, with the first orthographic projection covering the second orthographic projection. This configuration allows the limiting blocks 13 to apply a more balanced external force to the outer shell 200, enabling the outer shell 200 to better fit with the gap measuring portions 1003, and the gap measuring portions 1003 to better support the outer shell 200 and the limiting blocks 13, reducing the risk of deformation of the outer shell 200 under the action of the limiting blocks 13.

[0114] In at least one embodiment, the orthographic projection of the gap adjusting member 3 in the groove 21 on one side of the gap measuring part 1003 corresponding to the limiting block 13 onto the first wall 2001 along the first direction X is a third orthographic projection, and the orthographic projection of the gap adjusting member 3 in the groove 21 on the other side of the gap measuring part 1003 corresponding to the limiting block 13 onto the first wall 2001 along the first direction X is a fourth orthographic projection. The first and third orthographic projections at least partially overlap, and the first and fourth orthographic projections at least partially overlap. This arrangement allows the limiting block 13 to press the outer shell 200 onto the gap adjusting member 3, and simultaneously presses the outer shells 200 on both sides of the gap measuring part 1003 onto two gap adjusting members 3, improving the utilization rate of the limiting block 13, eliminating the need for multiple limiting blocks 13, and facilitating the manipulation of the limiting block 13.

[0115] In some alternative embodiments, such as Figure 3 As shown, the gap calibration device also includes a connecting block 6. The contour block 2 and the top cover 100 are connected through the connecting block 6 to ensure the relative positional relationship between the contour block 2 and the top cover 100. For example, the connecting block 6 is provided with a slot 61, and the edge of the top cover 100 is inserted into the slot 61. The connecting block 6 and the contour block 2 are fixedly connected, thereby realizing the limiting connection between the top cover 100 and the contour block 2.

[0116] In some alternative embodiments, such as Figure 11 As shown, the gap calibration device also includes an upper reference plate 7, which is used to ensure the height difference between the top cover 100 and the outer shell 200.

[0117] This embodiment also provides a gap calibration method, which is applied to the gap calibration device described above. It is easy to operate and has a high calibration accuracy.

[0118] For example, such as Figure 12 As shown, the gap calibration method includes the following steps:

[0119] S1. The adjusting gap adjusting member 3 is in the first position, so that the abutting member 41 abuts against the first wall 2001, the lifting member 43 protrudes from the top surface of the top cover 100, and the first distance H1 between the end face of the lifting member 43 away from the displacement amplification component 42 and the top surface of the top cover 100 is measured.

[0120] S2, the gap adjusting member 3 is in the second position, so that the abutting member 41 abuts against the first wall 2001, the lifting member 43 protrudes from the top surface of the top cover 100, and the second distance H2 between the end face of the lifting member 43 away from the displacement amplification component 42 and the top surface of the top cover 100 is measured.

[0121] S3. Determine the actual gap value between the first wall 2001 and the gap measuring part 1003 of the top cover 100 based on the first distance H1 and the second distance H2;

[0122] S4. Calibrate the gap measurement value according to the actual gap value.

[0123] It should be noted that in step S1, when the gap adjusting member 3 is in the first position, there is a gap between the gap adjusting member 3 and the first wall 2001, and the gap measuring part 1003 of the top cover 100 is in contact with the first wall 2001. That is, the edge of the gap measuring part 1003 is closer to the first wall 2001 than the gap adjusting member 3.

[0124] In step S2, when the gap adjusting member 3 is in the second position, the gap adjusting member 3 abuts against the first wall 2001, and a gap is formed between the gap measuring part 1003 of the top cover 100 and the first wall 2001. That is, the edge of the gap adjusting member 3 is closer to the first wall 2001 than the gap measuring part 1003.

[0125] It should be noted that the second distance H2 is greater than the first distance H1, that is, when the gap adjusting member 3 moves from the first position to the second position, the lifting member 43 rises.

[0126] In step S3, the actual gap value between the first wall 2001 and the gap measuring part 1003 is the true gap value between the gap measuring part 1003 and the first wall 2001 when the gap adjusting member 3 is in the second position. This gap value has high precision and accuracy.

[0127] The gap calibration method provided in this embodiment is relatively simple to operate and has low complexity. Furthermore, the accuracy and precision of the gap value obtained between the gap measuring part 1003 and the first wall 2001 are higher, which reduces the difficulty of gap calibration.

[0128] In one or more embodiments of this application, in step S1, the limiting component 1 is controlled to apply a pressing force to the housing 200 so that the first wall 2001 abuts against the gap adjusting member 3. It should be noted that when measuring the gap value between the gap measuring part 1003 and the first wall 2001 between two adjacent grooves 21 of one of the groove groups 20, the limiting block 13 corresponding to the gap measuring part 1003 can be controlled to apply a pressing force to the first wall 2001 so that the first wall 2001 abuts against the gap adjusting member 3.

[0129] It should be noted that in step S1, the distance between the gap adjusting member 3 and the first wall 2001 in the first direction X is greater than the distance between the gap measuring part 1003 and the first wall 2001 in the first direction X. In some optional embodiments, the distance between the gap measuring part 1003 and the first wall 2001 in the first direction X can be 0 or greater than 0, and this embodiment does not limit this.

[0130] Before step S2, the limiting component 1 is separated from the housing 200, and the contour block 2 is removed from the housing 200. This facilitates the adjustment of the position of the gap adjusting component 3 relative to the contour block 2, avoiding the problem of being unable to adjust due to obstruction by the housing 200. It should be noted that the contour block 2 and the components mounted on the contour block 2 (such as the gap adjusting component 3, the displacement conversion mechanism 4, the differential component 5, the top cover 100, etc.) are removed together with the contour block 2.

[0131] In step S2, after adjusting the gap adjusting member 3 to the second position, the contour block 2 is installed into the housing 200, and the distance between the gap measuring part 1003 and the first wall 2001 in the first direction X is greater than the distance between the gap adjusting member 3 and the first wall 2001 in the first direction X. It should be noted that when the contour block 2 is installed into the housing 200, the components provided on the contour block 2 (such as the gap adjusting member 3, the displacement conversion mechanism 4, the differential member 5, the top cover 100, etc.) are installed into the housing 200 together with the contour block 2.

[0132] After step S2, the control limiting component 1 applies a compressive force to the housing 200 so that the first wall 2001 abuts against the gap adjusting member 3. After the contour block 2 is installed into the housing 200, in order to ensure that the gap adjusting member 3 can abut tightly against the first wall 2001, the limiting component 1 needs to apply a compressive force to the housing 200 again.

[0133] In some optional embodiments, when multiple grooves 21 are provided, and the multiple grooves 21 are divided into multiple groove groups 20, and the multiple groove groups 20 are spaced apart in the length direction (i.e., the third direction Z) of the top cover 100, the portion located between two grooves 21 in the groove group 20 is the gap measuring part 1003.

[0134] Optionally, in step S1, at least the gap adjusting member 3 in two adjacent grooves 21 belonging to the same groove group 20 is adjusted to be in a first position to obtain a first distance H1 between the end face of the lifting member 43 in the two adjacent grooves 21 of the same groove group 20 away from the displacement amplification component 42 and the top surface of the top cover 100.

[0135] In some embodiments, in step S2, at least the gap adjusting member 3 in two adjacent grooves 21 belonging to the same groove group 20 is adjusted to a second position to obtain a second distance H2 between the end face of the lifting member 43 in the two adjacent grooves 21 of the same groove group 20 away from the displacement amplification component 42 and the top surface of the top cover 100.

[0136] In at least one embodiment, for the gap between two adjacent grooves 21 of the same groove group 20, step S3 may include the following steps:

[0137] S31. Determine the actual gap value on one side of the gap measuring unit 1003 based on the first distance H1 and the second distance H2 on the third-direction Z-side of the gap measuring unit 1003, and record it as the first actual gap value G. s1 ;

[0138] S32. Determine the actual gap value on the other side of the gap measuring unit 1003 based on the first distance H1 and the second distance H2 on the other side of the gap measuring unit 1003 in the third direction Z, and record it as the second actual gap value G. s2 ;

[0139] S33, Based on the first actual gap value G s1 Second actual gap value G s2 The actual gap value between the gap measuring point of the gap measuring unit 1003 and the first wall 2001 is determined.

[0140] In step S31, the first actual gap value G s1 The distance that the gap measuring unit 1003 moves in the first direction X along the abutment member 41 on the third-direction Z-side. In step S32, the second actual gap value G is... s2 The distance that the abutment 41 on the other side of the gap measuring unit 1003 in the third direction Z moves in the first direction X. In this embodiment, the gap measuring point of the gap measuring unit 1003 is any point on the edge of the gap measuring unit 1003 near the first wall 2001. The distance between the two abutment members 41 of the gap measuring unit 1003 in the third direction Z can be accurately measured, and the distance between the gap measuring point and one of the abutment members 41 in the third direction Z can be accurately measured. Therefore, the actual gap value between the gap measuring point and the first wall 2001 in the first direction X can be calculated.

[0141] In one or more embodiments of this application, the second actual gap value G s2 Greater than the first actual gap value G s1 Step S33 may include the following steps:

[0142] S331. Determine the distance between two adjacent abutting parts 41 on both sides of the same gap measuring part 1003 in the third direction Z, and record it as the first gap A1.

[0143] S332. Determine the gap measurement point and the first actual gap value G. s1 The distance of the corresponding abutment 41 in the third direction Z is denoted as the second spacing A2;

[0144] S333, based on the first spacing A1, the second spacing A2, and the first actual gap value G s1 And the second actual gap value G s2 The actual gap value between the gap measurement point and the first wall 2001 is determined and denoted as G. s3 , among which, (G s3 -G s1 ) / (G s2 -G s1 = (A1-A2) / A1.

[0145] In step S331, the first spacing A1 is specifically the distance between the positions where the two abutting members 41 abut against the first wall 2001, in order to further improve the accuracy of the measurement.

[0146] In step S332, the second spacing A2 is the gap measurement point and the first actual gap value G. s1 The distance between the corresponding abutment 41 and the position of the first wall 2001 is adjusted to further improve the accuracy of the measurement.

[0147] In step S333, the actual gap value between the gap measuring point and the first wall 2001 is related to the distance between the gap measuring point and the abutment 41. Therefore, it can be determined based on the first spacing A1, the second spacing A2, and the first actual gap value G. s1 And the second actual gap value G s2 The proportional relationship between them yields the actual gap value G between the gap measurement point and the first wall 2001. s3 .

[0148] As can be seen, according to the gap calibration method provided in this embodiment, the actual gap value between any point on the gap measuring part 1003 and the first wall 2001 can be obtained. Therefore, the gap value at different locations can be calibrated, which is more versatile, more reliable, and simpler and more convenient to operate.

[0149] In at least one possible implementation, when the gap calibration device includes a differential member 5 and the amplification factor of the displacement amplification component 42 is n, that is, the distance that the lifting member 43 moves in the second direction Y is n times the distance that the abutting member 41 moves in the first direction X.

[0150] In step S1, after the abutting member 41 abuts against the first wall 2001, the distance between the gap adjusting member 3 and the first wall 2001 in the first direction X is measured and recorded as the third distance (e.g., ...). Figure 13 (As shown) L1. Since there is a gap between the gap adjusting member 3 and the first wall 2001 in step S1, the third distance L1 is greater than 0. In other optional embodiments, the distance between the gap adjusting member 3 and the edge of the top cover 100 in the first direction X can be measured before step S2. This distance is the same as the third distance L1. This embodiment does not limit this.

[0151] In some optional embodiments, step S2 includes the following steps:

[0152] S21, Provides a preset gap value G y ;

[0153] S22, According to the preset gap value G y And the third distance L1, determine the rotation angle of the differential 5;

[0154] S23. Rotate the differential 5 according to the rotation angle of the differential 5. The differential 5 drives the clearance adjustment member 3 to move relative to the contour block 2 until the clearance adjustment member 3 is in the second position.

[0155] It should be noted that in step S21, the preset gap value G y The preset gap value G is a predetermined value in millimeters. y The specific values ​​can be 0.07mm, 0.06mm, 0.065mm, 0.075mm, 0.08mm, etc., and this embodiment does not limit them.

[0156] In step S22, the differential member 5 is a differential screw. In step S23, the differential member 5 can be rotated by a wrench, so that the differential member 5 drives the gap adjusting member 3 to move relative to the contour block 2 until the gap adjusting member 3 is in the second position.

[0157] In step S3, the fourth distance L2 that the abutment member 41 moves in the first direction X is determined according to the formula L2 = (H2 - H1) / n, and the actual gap value between the first wall 2001 and the gap measuring part 1003 of the top cover 100 is determined according to the fourth distance L2. It should be noted that in step S3, the fourth distance L2 that the abutment member 41 moves in the first direction X corresponding to H1 and H2 is determined, and it is the distance that the abutment member 41 moves in the first direction X when the gap adjusting member 3 moves from the first position to the second position.

[0158] In some embodiments, when multiple grooves 21 form multiple groove groups 20, the actual gap value between the first wall 2001 and the gap measuring part 1003 of the top cover 100 can be determined based on the fourth distance L2, which can be obtained from steps S331 to S33 above.

[0159] In other embodiments, if only the fourth distance L2 corresponding to the abutment 41 in the groove 21 is obtained, the actual gap value between the gap measuring point and the first wall 2001 can be calculated proportionally based on the distance between the gap measuring end of the gap measuring part 1003 and the abutment 41. This embodiment does not limit this.

[0160] In at least one possible implementation, the first scale 33 on the gap adjusting member 3 and the second scale 53 on the differential member 5 are both divided into m divisions, and the pitch of the first threaded section 51 of the differential member 5 is P1, and the pitch of the second threaded section 52 is P2.

[0161] For example, step S22 includes the following steps:

[0162] S221. Determine the adjustment accuracy K of the differential 5, where K = (P2 - P1) / m;

[0163] S222, based on the preset gap value G y The third distance L1 and the adjustment accuracy K determine the number of rotation intervals d of the differential 5, where d = (G y +L1) / K.

[0164] In step S221, after obtaining the required number of rotation intervals for the differential 5, the differential 5 is rotated, and the number of rotation intervals of the differential 5 relative to the clearance adjustment member 3 is determined during the rotation process, until it has rotated d intervals.

[0165] The gap calibration method provided in this embodiment can accurately adjust the gap to any gradient, which is convenient for experimental design and verification. It also allows for actual measurement of the adjusted gap, preventing errors during the assembly process and improving the accuracy of gap calibration.

[0166] This embodiment provides a specific example to illustrate the gap calibration method provided in this embodiment.

[0167] The pitch P1 of the first threaded section 51 of the differential component 5 is 0.4 mm, and the pitch P2 of the second threaded section 52 is 0.5 mm. The first scale 33 and the second scale 53 are each divided into 50 divisions. Therefore, the adjustment accuracy K of the differential component 5 is 0.002 mm, meaning that the adjustment accuracy K corresponding to one division is 0.002 mm. The magnification n of the displacement amplification component 42 is 10. The distance (i.e., the first spacing A1) between the abutting members 41 in two adjacent grooves 21 within the same groove group 20 in the third direction Z is 8 mm.

[0168] After assembling the contour block 2 and the top cover 100 into the housing 200, the gap adjustment pieces on both sides of a certain gap measuring part 1003 are adjusted to be spaced apart from the first wall 2001, and the distance between the gap adjustment piece 3 and the first wall 2001 in the first direction X is the third distance L1. Then, the housing 200 is assembled and placed into the equipment clamp, and pressed in place by the limiting block 13 of the limiting component 1. Afterwards, it can be used to measure the height difference between the lifting pieces 43 on both sides of the gap measuring part 1003 and the top cover 100 using a 3D profilometer. For ease of description, the two sides of the gap measuring part 1003 are referred to as the left side and the right side, where the height difference H1 on the left side of the gap measuring part 1003 is 0.2 mm and the height difference H1 on the right side is 0.15 mm. Next, the outer casing 200 is removed from the device as a whole, and the distance between the left and right gap adjustment parts 3 and the edge of the top cover 100 in the first direction X is measured using a height gauge. The distance between the left gap adjustment part 3 and the edge of the top cover 100 is found to be 0.1 mm, and the distance between the right gap adjustment part 3 and the edge of the top cover 100 is 0.13 mm. The preset gap values ​​on both sides are 0.07 mm. At this point, based on (0.07 + 0.1) / 0.002 = 85 divisions, it can be determined that the differential part 5 on the left side of the gap adjustment part needs to rotate 85 divisions. Based on (0.07 + 0.13) / 0.002 = 100 divisions, it can be determined that the differential part 5 on the right side of the gap adjustment part needs to rotate 100 divisions.

[0169] Next, after adjusting the gap adjustment component 3, the contouring component and the parts set on the contouring component are assembled into the outer shell 200 and clamped a second time. After the limiting block 13 is pressed, the height difference between the lifting components 43 on both sides of the gap measuring part 1003 and the top cover 100 is measured using a 3D profiler. The height difference H2 on the left side of the gap measuring part 1003 is 950 mm, and the height difference H2 on the right side of the gap measuring part 1003 is 0.850 mm. Therefore, according to the calculation, the fourth distance that the abutment component 41 on the left side of the gap measuring part 1003 moves in the first direction X is (0.950-0.200) / 10=0.075 mm, and the fourth distance that the abutment component 41 on the left side of the gap measuring part 1003 moves in the first direction X is (0.850-0.150) / 10=0.07 mm.

[0170] Finally, the second gap A2 was measured to be 5 mm. Based on the distance between the gap measurement point and the abutment 41 on one side, the actual gap value G between the gap measurement point and the first wall 2001 can be calculated. s3 For: (G) s3 -0.070) / (0.075-0.070) = (8-5) / 8, that is, G s3 =0.0719.

[0171] The gap calibration device and gap calibration method provided in this embodiment allow for adjustment of the gap between the gap measuring unit 1003 and the first wall 2001 of the outer shell 200. The gap is converted into a height difference, and after adjustment, the true value of the gap can be accurately measured. The values ​​on both sides of the gap measuring unit 1003 can be measured. The specific gap value at any position (any gap measuring point) on the gap measuring unit 1003 can be calculated through the similarity principle, which is used for the accuracy calibration of the gap test of the 3D profiler. Furthermore, this embodiment is designed using the top cover 100 and outer shell 200 of a normal battery product. The material surface condition of the gap measuring part 1003 is consistent with that of the real product, avoiding the influence of material or surface differences of the test object on the linear laser reflection during gap calibration and normal gap testing, which could lead to calibration deviation. In addition, a specific structure is used to convert the gap in the first direction X into a height difference in the second direction Y. The gap value can be obtained by measuring the height difference, avoiding the problem that the gap cannot be calibrated due to physical limitations. Moreover, a gap adjusting part 3 driven by a differential part 5 is designed on both sides of the gap measuring part 1003, which can accurately adjust the gap size. The gaps on both sides can be adjusted independently, which can simulate different forms of real failure gaps, avoiding the problem of fixed and uniform machined gaps, and thus improving accuracy.

[0172] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A gap calibration device for calibrating the gap between the top cover (100) of a battery and the first wall (2001) of the outer casing (200), characterized in that, The gap calibration device includes: A limiting component (1) is provided on the side of the housing (200) away from the top cover (100) and is used to apply a compressive force to the housing (200); The contour block (2) is disposed in the cavity formed by the outer shell (200) and the top cover (100). The contour block (2) is provided with a groove (21). The groove (21) is provided with slots (211) on the side facing the first wall (2001) and the side facing the top cover (100). A gap adjusting member (3) is located in the groove (21) and is adjustablely connected to the contour block (2) along the first direction (X) so that the gap adjusting member (3) can abut against the first wall (2001); the first direction (X) is the wall thickness direction of the first wall (2001); The displacement conversion mechanism (4) includes an abutment (41), a displacement amplification component (42), and a lifting component (43). The abutment (41) is at least partially disposed in the groove (21) and rotatably connected to the contour block (2). The abutment (41) abuts against the side of the first wall (2001) away from the limiting component (1). The displacement amplification component (42) is fixedly connected to the abutment (41) and is movably disposed in the groove (21). The lifting component (43) is connected to the displacement amplification component (42). The top cover (100) is provided with a sliding hole (1002) extending along the second direction (Y). One end of the lifting component (43) passes through the sliding hole (1002). The second direction (Y) is the thickness direction of the top cover (100).

2. The gap calibration device according to claim 1, characterized in that, The displacement amplification component (42) includes a gear (421), a transmission component (422), and a first shaft (423). The gear (421) is fixedly connected to the abutment component (41) and is rotatably connected to the contour block (2). The first shaft (423) is located in the groove (21) and connected to the contour block (2). The transmission component (422) is rotatably sleeved on the first shaft (423). The lifting component (43) is provided with a rack portion (431). One end of the transmission component (422) meshes with the gear (421), and the other end of the transmission component (422) meshes with the rack portion (431).

3. The gap calibration device according to claim 2, characterized in that, The transmission component (422) includes a first transmission end (4221) and a second transmission end (4222) disposed opposite to each other. The first transmission end (4221) meshes with the gear (421), and the second transmission end (4222) meshes with the rack portion (431). The distance between the first shaft (423) and the first transmission end (4221) is less than the distance between the first shaft (423) and the second transmission end (4222).

4. The gap calibration device according to claim 1, characterized in that, The displacement amplification component (42) further includes an elastic element (424); the elastic element (424) is disposed between the lifting component (43) and the contour block (2), and the extension direction of the elastic element (424) is the second direction (Y), and the elastic element (424) is used for the reset of the lifting component (43).

5. The gap calibration device according to claim 1, characterized in that, The gap calibration device further includes a differential member (5) extending along the first direction (X). The differential member (5) has a first threaded section (51) and a second threaded section (52). The first threaded section (51) is screwed to the contour block (2), and the second threaded section (52) is screwed to the gap adjusting member (3). The pitch of the first threaded section (51) is smaller than the pitch of the second threaded section (52).

6. The gap calibration device according to claim 5, characterized in that, The gap adjusting member (3) has a scale surface (32), the scale surface (32) is provided with a first scale (33), the scale surface (32) is provided with a screw hole (34), the differential member (5) is screwed into the screw hole (34), and the differential member (5) is provided with a second scale (53) on the end face of one end of the scale surface (32).

7. The gap calibration device according to any one of claims 1-6, characterized in that, The top cover (100) is provided with a notch (1001), and the gap adjustment member (3) is provided with an extension (31) located in the notch (1001). The surface of the extension (31) away from the bottom wall of the outer shell (200) is flush with the surface of the top cover (100) away from the contour block (2). And / or, the limiting component (1) has a first surface (11) and a second surface (12) disposed opposite each other in the second direction (Y), the second surface (12) being closer to the bottom wall of the housing (200) than the first surface (11), and the gap adjusting member (3) having its surface facing away from the top cover (100) positioned in the second direction (Y) closer to the bottom wall of the housing (200) than the second surface (12).

8. The gap calibration device according to any one of claims 1-6, characterized in that, The groove (21) is provided in multiple ways, and the multiple grooves (21) are divided into multiple slot groups (20), and the multiple slot groups (20) are spaced apart in the length direction of the top cover (100); Each of the slot groups (20) includes two spaced grooves (21), and each groove (21) is provided with a gap adjustment member (3) and a displacement conversion mechanism (4).

9. The gap calibration device according to claim 8, characterized in that, The portion of the top cover (100) located between the two grooves (21) of the slot group (20) is a gap measuring part (1003). The top cover (100) includes a plurality of gap measuring parts (1003). The limiting component (1) includes a plurality of limiting blocks (13) corresponding one-to-one with the plurality of gap measuring parts (1003). The orthographic projection of the limiting block (13) on the first wall (2001) along the first direction (X) is a first orthographic projection. The orthographic projection of the gap measuring part (1003) corresponding to the limiting block (13) on the first wall (2001) along the first direction (X) is a second orthographic projection. The first orthographic projection covers the second orthographic projection. The orthographic projection of the gap adjusting member (3) in the groove (21) on one side of the gap measuring part (1003) corresponding to the limiting block (13) onto the first wall (2001) along the first direction (X) is a third orthographic projection. The orthographic projection of the gap adjusting member (3) in the groove (21) on the other side of the gap measuring part (1003) corresponding to the limiting block (13) onto the first wall (2001) along the first direction (X) is a fourth orthographic projection. The first orthographic projection and the third orthographic projection at least partially overlap.

10. A gap calibration method, applied to the gap calibration device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Adjust the gap adjustment member (3) to the first position so that the abutment member (41) abuts against the first wall (2001), the lifting member (43) protrudes from the top surface of the top cover (100), and measure the first distance H1 between the end face of the lifting member (43) away from the displacement amplification component (42) and the top surface of the top cover (100); S2. Adjust the gap adjustment member (3) to the second position so that the abutment member (41) abuts against the first wall (2001), the lifting member (43) protrudes from the top surface of the top cover (100), and measure the second distance H2 between the end face of the lifting member (43) away from the displacement amplification component (42) and the top surface of the top cover (100); S3. Determine the actual gap value between the first wall (2001) and the gap measuring part (1003) of the top cover (100) based on the first distance H1 and the second distance H2; S4. Calibrate the gap measurement value based on the actual gap value.

11. The gap calibration method according to claim 10, characterized in that, The groove (21) is provided in multiple ways, and the multiple grooves (21) are divided into multiple groove groups (20). The multiple groove groups (20) are spaced apart in the length direction of the top cover (100). The part between two grooves (21) in the groove group (20) is the gap measuring part (1003). In step S1, at least two adjacent grooves (21) belonging to the same groove group (20) are adjusted to be in the first position; in step S2, at least two adjacent grooves (21) belonging to the same groove group (20) are adjusted to be in the second position. Step S3 includes the following steps: S31. Determine the actual gap value on one side of the gap measuring unit (1003) based on the first distance H1 and the second distance H2 on the third direction (Z) side of the gap measuring unit (1003), and record it as the first actual gap value G. s1 The third direction (Z) is perpendicular to both the first direction (X) and the second direction (Y). S32. Determine the actual gap value on the other side of the gap measuring unit (1003) based on the first distance H1 and the second distance H2 on the other side of the third direction (Z), and record it as the second actual gap value G. s2 ; S33, Based on the first actual gap value G s1 Second actual gap value G s2 The actual gap value between the gap measuring point of the gap measuring unit (1003) and the first wall (2001) is determined.

12. The gap calibration method according to claim 11, characterized in that, The second actual gap value G s2 Greater than the first actual gap value G s1 Step S33 includes the following steps: S331. Determine the distance between two adjacent abutting members (41) on both sides of the same gap measuring part (1003) in the third direction (Z) in the third direction (Z), and denot it as the first gap A1; S332. Determine the gap measurement point and the first actual gap value G. s1 The distance between the corresponding abutment (41) and the third direction (Z) is denoted as the second spacing A2; S333, based on the first spacing A1, the second spacing A2, and the first actual gap value G s1 And the second actual gap value G s2 The actual gap value between the gap measurement point and the first wall (2001) is determined and denoted as G. s3 , among which, (G s3 -G s1 ) / (G s2 -G s1 = (A1-A2) / A1.

13. The gap calibration method according to claim 10, characterized in that: In step S1, the limiting component (1) is controlled to apply a pressing force to the outer shell (200) so that the first wall (2001) abuts against the gap adjusting member (3), and the distance between the gap adjusting member (3) and the first wall (2001) in the first direction (X) is greater than the distance between the gap measuring part (1003) and the first wall (2001) in the first direction (X); Before step S2, adjust the limiting component (1) to separate from the housing (200) and remove the contour block (2) from the housing (200); In step S2, after adjusting the gap adjustment member (3) to the second position, the contour block (2) is installed into the outer shell (200), and the distance between the gap measuring part (1003) and the first wall (2001) in the first direction (X) is greater than the distance between the gap adjustment member (3) and the first wall (2001) in the first direction (X); After step S2, the limiting component (1) is controlled to apply a compressive force to the housing (200) so that the first wall (2001) abuts against the gap adjusting member (3).

14. The gap calibration method according to claim 10, characterized in that, The gap calibration device also includes a differential component (5), and the amplification factor of the displacement amplification component (42) is n; In step S1, after the abutting member (41) abuts against the first wall (2001), the distance between the gap adjusting member (3) and the first wall (2001) in the first direction (X) is measured and recorded as the third distance L1; Step S2 includes the following steps: S21, Provides a preset gap value G y ; S22, According to the preset gap value G y And the third distance L1, to determine the rotation angle of the differential (5); S23. Rotate the differential (5) according to the rotation angle of the differential (5), and the differential (5) drives the gap adjustment (3) to move relative to the contour block (2) until the gap adjustment (3) is located in the second position; In step S3, the fourth distance L2 of the movement of the abutment (41) in the first direction (X) is determined according to the formula L2=(H2-H1) / n, and the actual gap value between the first wall (2001) and the gap measuring part (1003) of the top cover (100) is determined according to the fourth distance L2.

15. The gap calibration method according to claim 14, characterized in that, The first scale (33) and the second scale (53) are both divided into m divisions; the pitch of the first thread segment (51) of the differential (5) is P1, and the pitch of the second thread segment (52) of the differential (5) is P2. Step S22 includes the following steps: S221. Determine the adjustment accuracy K of the differential (5), where K = (P2 - P1) / m; S222, based on the preset gap value G y The third distance L1 and the adjustment accuracy K determine the number of rotations d of the differential (5), where d = (G y +L1) / K.

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