Groove end height detection device for cylindrical steel shell batteries

Abstract

The present invention relates to the technical field of lithium battery production, and provides a device for detecting the end height of a rolling groove of a cylindrical steel-shell battery, comprising: a testing platform, a fixture and a height measuring mechanism; the fixture is used to clamp the cylindrical steel-shell battery, and the fixture is rotatably arranged on the testing platform; the rotation axis of the fixture is arranged along the height direction of the testing platform, and the rotation axis of the fixture coincides with the axis of the cylindrical steel-shell battery; the height measuring mechanism is arranged on the upper side of the fixture along the height direction of the testing platform, and the detection end of the height measuring mechanism is used to abut against the exposed end face of the cylindrical steel-shell battery; the fixture is provided with a reference surface for the detection end to abut, and the reference surface is coplanar with the side wall of the rolling groove close to the exposed side; the present invention improves the efficiency and accuracy of measurement by placing the cylindrical steel-shell battery on the testing platform for measuring the end height size.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to a rolling groove end height detection device for cylindrical steel shell batteries. Background Art

[0002] During the production process of cylindrical steel-shell batteries, a grooving process is required on the steel shell to prepare for subsequent sealing processes. If the size of the grooving changes, it will affect subsequent processes such as liquid injection, cap welding, sealing and heat shrinkage, thereby affecting the quality of the cylindrical steel-shell battery. Therefore, the size detection of the grooving is very important.

[0003] The end height dimension is a more important dimension among the multiple dimensions of the rolling groove. The end height dimension refers to the distance between the side wall of the rolling groove close to the steel shell opening and the steel shell opening. The existing detection method for the end height dimension is manual measurement using a vernier caliper, which has low efficiency and accuracy. Summary of the Invention

[0004] The present invention provides a groove end height detection device for cylindrical steel shell batteries, which is used to solve or improve the problems of low detection efficiency and accuracy in the process of detecting the end height size of cylindrical steel shell batteries.

[0005] The present invention provides a device for detecting the height of a rolling groove end of a cylindrical steel shell battery, comprising: a detection platform, a fixture and a height measuring mechanism;

[0006] The clamp is used to clamp the cylindrical steel-shell battery. The clamp is rotatably arranged on the testing platform. The rotation axis of the clamp is arranged along the height direction of the testing platform. The rotation axis of the clamp coincides with the axis of the cylindrical steel-shell battery.

[0007] The height measuring mechanism is provided on the upper side of the fixture along the height direction of the detection platform, and the detection end of the height measuring mechanism is used to abut against the exposed end surface of the cylindrical steel shell battery;

[0008] The fixture is provided with a reference surface for the detection end to abut against, and the reference surface is coplanar with the side wall of the rolling groove close to the opening.

[0009] According to a device for detecting the height of a rolling groove end of a cylindrical steel shell battery provided by the present invention, the clamp includes a first clamping die and a second clamping die;

[0010] The first clamping die and the second clamping die are arranged opposite to each other, and a side of the first clamping die close to the second clamping die and a side of the second clamping die close to the first clamping die are both provided with grooves adapted to the cylindrical steel shell battery.

[0011] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, a positioning portion is provided in the groove, the positioning portion extends circumferentially around the rotation axis of the clamp, the positioning portion is used to extend into the rolling groove, and the reference surface is formed on the side of the positioning portion close to the height measuring mechanism.

[0012] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, the fixture further includes a fixing seat, and the fixing seat includes a first fixing block and a second fixing block;

[0013] The first clamping die is connected to the first fixed block, the second clamping die is connected to the second fixed block, and the first fixed block is connected to the second fixed block; the fixing seat is rotatably connected to the detection platform.

[0014] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, the detection platform includes a marble platform and a rotating seat, the rotating seat is rotatably connected to the marble platform, and the rotating seat is connected to the clamp.

[0015] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, a magnet is provided on the rotating seat, and the magnet is used to adsorb the clamp.

[0016] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, a positioning hole is provided on the marble platform, the positioning hole is adapted to the clamp, and the rotating seat is arranged in the positioning hole.

[0017] According to a device for detecting the height of a rolling groove end of a cylindrical steel shell battery provided by the present invention, the detection platform further includes a column;

[0018] The column is connected to the marble platform, and the column extends along the height direction of the detection platform. The height measuring mechanism is movably arranged on the column.

[0019] According to a rolling groove end height detection device for cylindrical steel shell batteries provided by the present invention, a locking mechanism is provided on the column, and the locking mechanism is used to lock the height measuring mechanism on the column.

[0020] According to a device for detecting the height of a grooved end of a cylindrical steel-shell battery provided by the present invention, the height measuring mechanism includes a dial indicator, and the detection end of the height measuring mechanism is formed on a probe of the dial indicator.

[0021] The groove end height detection device for cylindrical steel shell batteries provided by the present invention uses a clamp to clamp the cylindrical steel shell battery when measuring the end height size, and the detection end of the height measuring mechanism on the upper side of the clamp is abutted against the reference surface. The reference surface serves as the reference for measuring the end height size, which is equivalent to using the reference surface to reset the height measuring mechanism to zero. The reading at this time is the first value. The detection end is then abutted against the exposed end face. The reading at this time is the second value. The end height size can be obtained by the difference between the second value and the first value. The clamp is rotated to change the abutment position of the detection end on the end face, and multiple points on the end face can be measured, thereby improving the comprehensiveness and accuracy of the measurement. There is no need to manually use a vernier caliper for measurement, which improves the measurement efficiency and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the cylindrical steel shell battery provided by the present invention

[0024] Figure 2 Schematic diagram of the structure of the groove end height detection device for cylindrical steel shell batteries provided by the present invention;

[0025] Figure 3 It is a structural schematic diagram of the first clamping die provided by the present invention;

[0026] Figure 4 It is a structural schematic diagram of the second clamping die provided by the present invention;

[0027] Figure 5 It is a structural schematic diagram of the detection platform provided by the present invention;

[0028] Reference numerals:

[0029] 1: Cylindrical steel-shell battery; 11: Rolling groove; 2: Testing table; 21: Marble platform; 22: Rotating seat; 23: Column; 3: Clamp; 31: First clamping die; 32: Second clamping die; 33: Groove; 34: Positioning part; 35: First fixing block; 36: Second fixing block; 4: Height measuring mechanism; 5: Locking mechanism. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0033] The following combination Figures 1 to 5 The present invention provides a device for detecting the height of a grooved end of a cylindrical steel-shell battery.

[0034] First combine Figure 1 The end height of the cylindrical steel-shell battery 1 is described. A rolling groove 11 is processed on the side of the steel shell of the cylindrical steel-shell battery 1 close to the opening. The distance h between the side wall of the rolling groove 11 close to the opening and the opening is the end height.

[0035] like Figure 2 As shown, the rolling groove end height detection device for cylindrical steel shell batteries shown in this embodiment includes: a detection platform 2, a clamp 3 and a height measuring mechanism 4.

[0036] The clamp 3 is used to clamp the cylindrical steel-shell battery 1. The clamp 3 is rotatably provided on the testing platform 2, so that the clamp 3 can drive the cylindrical steel-shell battery 1 to rotate on the testing platform 2; wherein, the rotation axis of the clamp 3 is arranged along the height direction of the testing platform 2, and the rotation axis of the clamp 3 coincides with the axis of the cylindrical steel-shell battery 1, that is, the cylindrical steel-shell battery 1 rotates around its own axis; the height measuring mechanism 4 is provided on the upper side of the clamp 3 along the height direction of the testing platform 2, and the detection end of the height measuring mechanism 4 is used to abut against the open end face of the cylindrical steel-shell battery 1; a reference surface for the detection end to abut is provided on the clamp 3, and the reference surface is coplanar with the side wall of the rolling groove close to the open side.

[0037] Specifically, the groove end height detection device for cylindrical steel shell batteries shown in this embodiment, when measuring the end height size, uses the clamp 3 to clamp the cylindrical steel shell battery 1, and the detection end of the height measuring mechanism 4 on the upper side of the clamp 3 is abutted against the reference plane. The reference plane serves as the reference for measuring the end height size, which is equivalent to using the reference plane to reset the height measuring mechanism 4 to zero. The reading at this time is the first value, and then the detection end is abutted against the exposed end face. The reading at this time is the second value. The end height size can be obtained by the difference between the second value and the first value. The clamp 3 is rotated to change the abutment position of the detection end on the end face, and then multiple points on the end face can be measured, which improves the comprehensiveness and accuracy of the measurement. There is no need to manually use a vernier caliper for measurement, which improves the measurement efficiency and measurement accuracy.

[0038] Among them, the height measuring mechanism 4 is preferably a dial indicator, which includes a dial, a spring and a probe. The probe is connected to the spring, and the probe is the detection end. In actual use, the dial indicator is fixed, that is, the relative position of the dial indicator and the fixture 3 remains unchanged. The dial indicator is reset to zero by abutting the probe against the reference surface. The operator lifts the probe by hand so that the height of the probe is higher than the opening of the cylindrical steel shell battery 1, and then releases the probe. The probe abuts against the end face of the opening under the action of the spring. At this time, the reading on the dial is the end height size.

[0039] Taking the cylindrical steel shell battery model 26700 as an example, the end height dimension of this model of cylindrical steel shell battery is 4.7±0.1mm.

[0040] In some embodiments, as Figures 2 to 4 As shown, the clamp 3 includes a first clamping mold 31 and a second clamping mold 32; the first clamping mold 31 and the second clamping mold 32 are arranged opposite to each other, and the side of the first clamping mold 31 close to the second clamping mold 32 and the side of the second clamping mold 32 close to the first clamping mold 31 are both concavely provided with a groove 33 adapted to the cylindrical steel shell battery 1, and the outer wall surface of the cylindrical steel shell battery 1 can fit with the groove 33, thereby ensuring the stability of the clamping.

[0041] In some embodiments, as Figure 3 and Figure 4 As shown, a positioning portion 34 is provided in the groove 33 shown in this embodiment. The positioning portion 34 extends circumferentially around the rotation axis of the clamp 3 to form an annular structure. The positioning portion 34 is used to extend into the rolling groove 11, and the reference surface is formed on the side of the positioning portion 34 close to the height measuring mechanism 4.

[0042] Specifically, by providing an annular positioning portion 34 in the groove 33, when the first clamping die 31 and the second clamping die 32 clamp the cylindrical steel-shell battery 1, the positioning portion 34 can be embedded in the rolling groove 11, thereby positioning the clamping portion of the cylindrical steel-shell battery 1, so that the relative position of the fixture 3 and the cylindrical steel-shell battery 1 can be kept fixed, thereby ensuring the reliability of the reference surface and improving the accuracy of the measurement.

[0043] The positioning portion 34 on the first clamping die 31 may be an integral structure with the first clamping die 31 , and the positioning portion 34 on the second clamping die 32 may be an integral structure with the second clamping die 32 .

[0044] Since the probe of the dial indicator is located directly above the end face of the opening, when returning the dial indicator to zero, the cylindrical steel-shell battery 1 needs to be removed from the fixture 3 so that the probe can abut against the reference surface on the positioning portion 34. The relative positions of the fixture 3 and the cylindrical steel-shell battery 1 can be kept fixed, and the dial indicator only needs to be zeroed once. In the process of placing the cylindrical steel-shell battery 1 into the fixture 3, the operator lifts the probe by hand to avoid the opening of the cylindrical steel-shell battery 1. After the cylindrical steel-shell battery 1 is fixed, the probe is released, and the probe can automatically abut against the end face of the opening to complete the measurement.

[0045] In some embodiments, as Figures 2 to 4 As shown, the fixture 3 shown in this embodiment also includes a fixed seat, which includes a first fixed block 35 and a second fixed block 36; the first clamping mold 31 is connected to the first fixed block 35, the second clamping mold 32 is connected to the second fixed block 36, and the first fixed block 35 is connected to the second fixed block 36; the fixed seat is rotatably connected to the detection table 2.

[0046] Specifically, by splicing the first fixing block 35 and the second fixing block 36, the cylindrical steel shell battery 1 can be clamped by the first clamping die 31 and the second clamping die 32; after measuring a point on the open end face, the fixing seat is rotated to drive the cylindrical steel shell battery to rotate, while the probe always remains stationary, and the abutment position of the probe on the end face changes, so that another point can be measured. In the actual measurement process, three evenly distributed points are usually selected for measurement to ensure the comprehensiveness and reliability of the measurement.

[0047] In some embodiments, as Figure 2 and Figure 5As shown, the testing platform 2 shown in this embodiment includes a marble platform 21 and a rotating seat 22 . The rotating seat 22 is rotatably connected to the marble platform 21 , and the rotating seat 22 is connected to the fixture 3 .

[0048] Specifically, based on the characteristics of marble material, the marble platform 21 has good stability, which ensures the stability of the clamp 3 on the rotating seat 22 during the rotation process, wherein the rotating seat is connected to the marble platform 21 through a thrust ball bearing.

[0049] In some embodiments, a magnet is provided on the rotating base 22 , and the magnet is used to adsorb the clamp 3 , so that the clamp 3 can be conveniently connected to the rotating base 22 through magnetic force.

[0050] In some embodiments, as Figure 5 As shown, a positioning hole is provided on the marble platform 21 shown in this embodiment, and the positioning hole is adapted to the clamp 3; the rotating seat 22 is provided in the positioning hole.

[0051] Specifically, when the fixture 3 is placed on the rotating seat 22, the positioning hole guides and positions the fixture 3 so that the fixture 3 can be accurately placed on the rotating seat 22, thereby ensuring the accuracy of the relative position between the cylindrical steel shell battery 1 on the fixture 3 and the probe.

[0052] In some embodiments, as Figure 2 and Figure 5 As shown, the detection platform 2 shown in this embodiment further includes a column 23 ; the column 23 is connected to the marble platform 21 , and the column 23 extends along the height direction of the detection platform 2 , and the height measuring mechanism 4 is movably provided on the column 23 .

[0053] Specifically, by adjusting the relative height between the dial indicator on the column 23 and the clamp 3 , the dial indicator is adjusted to a suitable position to facilitate the assembly and disassembly of the clamp 3 on the rotating seat 22 .

[0054] Further, if Figure 1 As shown, a locking mechanism 5 is provided on the column 23 shown in this embodiment. The locking mechanism 5 is used to lock the height measuring mechanism 4 on the column 23.

[0055] Specifically, during the actual measurement process, the relative position between the dial indicator and the fixture 3 needs to be kept fixed to ensure that the measurement reference remains unchanged. The dial indicator needs to be fixed to the column 23 through the locking mechanism 5, and then zeroed and measured.

[0056] The locking mechanism 5 may be a knob with threads.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for detecting the height of the groove end of a cylindrical steel shell battery, characterized in that: include: Testing bench; A fixture, the fixture is used to clamp the cylindrical steel-shell battery, the fixture is rotatably provided on the testing platform, the rotation axis of the fixture is arranged along the height direction of the testing platform, and the rotation axis of the fixture coincides with the axis of the cylindrical steel-shell battery; The clamp includes a first clamping die and a second clamping die; the first clamping die and the second clamping die are arranged opposite to each other, and a groove adapted to the cylindrical steel shell battery is provided on a side of the first clamping die close to the second clamping die and a side of the second clamping die close to the first clamping die; a positioning portion is provided in the groove, and the positioning portion extends circumferentially around the rotation axis of the clamp, and the positioning portion is used to extend into the rolling groove; A height measuring mechanism, the height measuring mechanism being provided on the upper side of the fixture along the height direction of the detection platform, the detection end of the height measuring mechanism being used to abut against the exposed end surface of the cylindrical steel shell battery; The fixture is provided with a reference surface for the detection end to abut against, the reference surface is formed on a side of the positioning portion close to the height measuring mechanism, and the reference surface is coplanar with a side wall of the rolling groove close to the opening; The testing platform comprises a marble platform and a rotating seat, wherein the rotating seat is rotatably connected to the marble platform, and the rotating seat is connected to the fixture.

2. The rolling groove end height detection device for cylindrical steel shell batteries according to claim 1 is characterized in that: The clamp further includes a fixing seat, and the fixing seat includes a first fixing block and a second fixing block; The first clamping die is connected to the first fixed block, the second clamping die is connected to the second fixed block, and the first fixed block is connected to the second fixed block; the fixing seat is rotatably connected to the detection platform.

3. The groove end height detection device for cylindrical steel shell batteries according to claim 1, characterized in that: A magnet is provided on the rotating seat, and the magnet is used to adsorb the clamp.

4. The rolling groove end height detection device for cylindrical steel shell batteries according to claim 1, characterized in that: A positioning hole is provided on the marble platform, the positioning hole is adapted to the clamp, and the rotating seat is arranged in the positioning hole.

5. The rolling groove end height detection device for cylindrical steel shell batteries according to claim 1, characterized in that: The testing platform also includes a column; The column is connected to the marble platform, and the column extends along the height direction of the detection platform. The height measuring mechanism is movably arranged on the column.

6. The rolling groove end height detection device for cylindrical steel shell batteries according to claim 5, characterized in that: The column is provided with a locking mechanism, and the locking mechanism is used to lock the height measuring mechanism on the column.

7. The rolling groove end height detection device for cylindrical steel shell batteries according to claim 1, characterized in that: The height measuring mechanism includes a dial indicator, and the detection end of the height measuring mechanism is formed on a probe of the dial indicator.

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