Clamp and detection device

Abstract

The utility model discloses a clamp and a detection device, the clamp comprises a supporting plate and a limiting block, the supporting plate is used for placing a sample to be detected, the supporting plate is provided with a detection hole, and the diameter of the detection hole is smaller than the diameter of the sample and larger than the diameter of a sealing nail on the sample; the limiting block is movably arranged on the supporting plate in the direction away from or close to the supporting plate and used for clamping the sample between the limiting block and the supporting plate. According to the utility model, as the detection hole with the diameter larger than that of the sealing nail is arranged on the supporting plate, a sample (a battery shell welded with the sealing nail) can be placed on the supporting plate during detection, the sealing nail can completely fall into the detection hole, and the shell can be prevented from providing supporting force for the sealing nail, so that the sealing force can be accurately measured; the actual welding strength can be accurately reflected, and technological parameters can be conveniently formulated.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing nail welding point detection, in particular to a clamp and a detection device. Background Art

[0002] With the widespread use of electronic products, the demand for batteries is growing. Steel-cased batteries, due to their high energy density and excellent mechanical strength, have found applications in a wide range of fields. In the production of steel-cased batteries, the sealing process after liquid injection is a key step in ensuring battery performance and safety. Traditional sealing methods typically involve welding sealing pins at the injection hole to seal the battery case, followed by weld quality inspection. This process is crucial to ensuring the battery's sealing and long-term stability.

[0003] At present, the common welding quality inspection method is to use the ejector pin to move downward to press the sealing pin. Figure 1 As shown, when the sealing nail 110 is welded to the battery shell 120, the nail cap overlaps the shell 120 and forms a welding point 121 at the overlap of the nail cap and the shell 120; since the diameter of the sealing nail 110 is larger than the diameter of the liquid injection hole on the shell 120, when the ejector pin 130 applies pressure, the shell 120 will provide a certain supporting force. Therefore, this structure results in the thrust obtained by the ejector pin 130 test not accurately reflecting the actual strength of the weld. Utility Model Content

[0004] The embodiments of the present utility model provide a clamp and a detection device to solve the problem that the shell provides a supporting force to the sealing pin during detection, thereby achieving the effect of accurately reflecting the actual strength of the welding.

[0005] Specifically, the utility model provides a clamp, including a support plate and a limit block, the support plate is used to place the sample to be tested, and a detection hole is provided on the support plate, the diameter of the detection hole is smaller than the diameter of the sample and larger than the diameter of the sealing pin on the sample; the limit block is movably provided on the support plate in a direction away from or close to the support plate, and is used to clamp the sample between the limit block and the support plate.

[0006] Optionally, the ratio of the diameter of the sealing pin to the diameter of the detection hole is 1.4-1.6.

[0007] Optionally, the support plate is provided with a first connecting plate and a second connecting plate, the first connecting plate being vertically arranged on the support plate, the second connecting plate being arranged at an end of the first connecting plate away from the support plate and extending in a direction parallel to the support plate; the second connecting plate is provided with a threaded hole;

[0008] The limiting block is located between the supporting plate and the second connecting plate; an adjusting bolt is threaded in the threaded hole, and the adjusting bolt passes through the second connecting plate and abuts against the limiting block.

[0009] Optionally, there are two limit blocks, which are arranged on opposite sides of the detection hole; and the second connecting plate is arranged in a one-to-one correspondence with the limit blocks.

[0010] Optionally, the fixture further includes a first base, and the support plate is movably disposed on the first base along a first direction.

[0011] Optionally, a first slide rail is provided on the first base, a first slide groove is provided on the support plate, and the first slide rail is slidably provided in the first slide groove.

[0012] Optionally, the clamp further includes a second base, and the first base is movably disposed on the second base along a second direction; the second direction is perpendicular to the first direction.

[0013] Optionally, a second slide rail is provided on the second base, a second slide groove is provided on the first base, and the second slide rail is slidably provided in the second slide groove.

[0014] The present utility model also provides a detection device, comprising a tensile testing machine and a fixture as described in any one of the above items, wherein the tensile testing machine is arranged on a side of the support plate close to the limit block; a ejector pin is provided on the output end of the tensile testing machine, and the output end can move in a direction away from or close to the support plate to drive the ejector pin to push or move away from the sealing pin on the sample.

[0015] Optionally, the diameter of the ejector pin is smaller than the diameter of the sealing pin.

[0016] The beneficial effects of the present invention are:

[0017] In the fixture and detection device provided by the present invention, since a detection hole with a diameter larger than the diameter of the sealing pin is provided on the support plate, the sample (battery shell with a sealing pin welded thereon) can be placed on the support plate during detection so that the sealing pin completely falls into the detection hole. This can prevent the shell from providing support force to the sealing pin, and thus the size of the sealing force can be accurately measured to accurately reflect the actual strength of the welding, facilitating the formulation of process parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only 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 labor.

[0019] Figure 1 It is a schematic diagram of the welding quality detection in the prior art;

[0020] Figure 2 This is a schematic structural diagram of a clamp in one embodiment of the present utility model;

[0021] Figure 3 This is a schematic partial structural diagram of a detection device in one embodiment of the present utility model;

[0022] Figure 4 It is a schematic principle diagram of welding quality detection in one embodiment of the utility model.

[0023] Figure 1 Middle: 110, sealing nail, 120, shell, 121, welding point, 130, ejector pin;

[0024] Figure 2-Figure 4 Middle: 200, support plate, 210, detection hole, 220, first connecting plate, 230, second connecting plate, 300, limit block, 400, sample, 410, sealing nail, 500, adjusting bolt, 600, first base, 610, first slide rail, 700, second base, 710, second slide rail, 800, connecting sleeve, 900, output end, 910, ejector pin. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary, such as by glue injection between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] Figure 2 This is a schematic structural diagram of a clamp in one embodiment of the present invention. Figure 2 As shown, and reference Figures 3 and 4 An embodiment of the utility model provides a clamp, including a support plate 200 and a limit block 300, wherein the support plate 200 is used to place a sample 400 to be tested, and a detection hole 210 is provided on the support plate 200, wherein the diameter of the detection hole 210 is smaller than the diameter of the sample 400 and larger than the diameter of the sealing pin 410 on the sample 400; the limit block 300 is movably provided on the support plate 200 in a direction away from or close to the support plate 200, and is used to clamp the sample 400 between the limit block 300 and the support plate 200.

[0029] In the embodiment of the present utility model, since a detection hole 210 having a diameter larger than that of the sealing pin 410 is provided on the support plate 200, the sample 400 (the battery shell with the sealing pin 410 welded thereto) can be placed on the support plate 200 during testing so that the sealing pin 410 completely falls into the detection hole 210, thereby preventing the shell from providing support force to the sealing pin 410. Therefore, the size of the sealing force can be accurately measured to accurately reflect the actual strength of the welding, thereby facilitating the formulation of process parameters.

[0030] In one embodiment of the present invention, the ratio of the diameter of the sealing pin 410 to the diameter of the inspection hole 210 is 1.4-1.6. If the ratio of the diameter of the sealing pin 410 to the diameter of the inspection hole 210 is too small, welding becomes difficult and may result in a loose weld. If the ratio of the diameter of the sealing pin 410 to the diameter of the inspection hole 210 is too large, the thrust of the ejector pin 910 may cause the weld to sag or deform during testing. Preferably, the ratio of the diameter of the sealing pin 410 to the diameter of the inspection hole 210 is 1.5.

[0031] In one embodiment of the present invention, the support plate 200 is provided with a first connecting plate 220 and a second connecting plate 230. The first connecting plate 220 is vertically mounted on the support plate 200, and the second connecting plate 230 is disposed at an end of the first connecting plate 220 away from the support plate 200 and extends parallel to the support plate 200. The second connecting plate 230 is provided with a threaded hole. The limit block 300 is located between the support plate 200 and the second connecting plate 230. An adjusting bolt 500 is threadedly mounted within the threaded hole. The adjusting bolt 500 passes through the second connecting plate 230 and abuts against the limit block 300. Specifically, the limit block 300 is a rubber block.

[0032] During testing, the sample 400 is placed between the support plate 200 and the limit block 300, and the adjusting bolt 500 is rotated so that the adjusting bolt 500 drives the limit block 300 to move, and then the limit block 300 cooperates with the support plate 200 to clamp the sample 400 between the support plate 200 and the limit block 300, thereby completing the fixation of the sample 400.

[0033] In one embodiment of the present invention, there are two limit blocks 300, which are disposed on opposite sides of the detection hole 210. The second connecting plates 230 are disposed in a one-to-one correspondence with the limit blocks 300, and the adjusting bolts 500 are disposed in a one-to-one correspondence with the limit blocks 300. This arrangement enables the two limit blocks 300 to clamp the sample 400 at both ends, thereby stably fixing the sample 400.

[0034] In one embodiment of the present invention, the fixture further comprises a first base 600, on which the support plate 200 is movably disposed along a first direction. Furthermore, a first slide rail 610 is disposed on the first base 600, and a first slide groove is disposed on the support plate 200, within which the first slide rail 610 slides. During use, the support plate 200 is slid along the first slide rail 610 along the first direction to adjust the position of the sample 400, thereby facilitating accurate alignment of the ejector pin 910 on the testing device with the sealing pin 410 for testing.

[0035] Similarly, the fixture also includes a second base 700, on which the first base 600 is movably mounted along a second direction perpendicular to the first direction. Furthermore, the second base 700 is provided with a second slide rail 710, within which a second slide groove is provided on the first base 600. During use, the first base 600 is slid along the second slide rail 710 along the second direction to adjust the position of the sample 400, allowing the ejector pin 910 on the testing device to accurately align with the sealing pin 410 for testing.

[0036] In one embodiment of the present invention, the fixture also includes a connecting sleeve 800, which is used to be sleeved on the detection station of the detection device; a connecting hole is opened on the side wall of the connecting sleeve 800, and a fixing pin passes through the connecting hole and is inserted into the detection station to fix the connecting sleeve 800 on the detection station.

[0037] like Figure 3 As shown, the present invention also provides a testing device comprising a tensile testing machine and the fixture of any of the above embodiments, so as to have all the effects of the fixture. The tensile testing machine is arranged on a side of the support plate 200 near the limit block 300; an ejector pin 910 is arranged on the output end 900 of the tensile testing machine. The output end 900 can move in a direction away from or toward the support plate 200 to drive the ejector pin 910 to push or move away from the sealing pin 410 on the sample 400.

[0038] In one embodiment of the present invention, the diameter of the ejector pin 910 is smaller than the diameter of the sealing pin 410 to avoid interference detection.

[0039] like Figure 4 As shown, during the test, the shell with the sealing nail 410 welded thereto is cut into a sample 400 of 5mm*5mm, and then the sample 400 is placed on the support plate 200, with the sealing nail 410 facing downward and completely located in the test hole 210; then, by tightening the adjusting bolt 500, the limit block 300 is moved toward the support plate 200, and the sample 400 is clamped between the support plate 200 and the limit block 300. Start the tensile testing machine, so that the output end 900 of the tensile testing machine drives the ejector pin 910 to move toward the support plate 200 until it contacts the sealing nail 410; continue to drive the ejector pin 910 to move, and the sealing force of the sealing nail 410 can be accurately measured to accurately reflect the actual strength of the weld and facilitate the formulation of process parameters.

[0040] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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. 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, and should all be included in the scope of protection of the present invention.

Claims

1. A clamp, characterized in that: The invention comprises a support plate (200) and a limiting block (300), wherein the support plate (200) is used for placing a sample (400) to be tested, and a detection hole (210) is provided on the support plate (200), wherein the diameter of the detection hole (210) is smaller than the diameter of the sample (400) and larger than the diameter of the sealing pin (410) on the sample (400); and the limiting block (300) is movably provided on the support plate (200) in a direction away from or close to the support plate (200), and is used for clamping the sample (400) between the limiting block (300) and the support plate (200).

2. The clamp according to claim 1, characterized in that The ratio of the diameter of the sealing pin (410) to the diameter of the detection hole (210) is 1.4-1.

6.

3. The clamp according to claim 1, characterized in that A first connecting plate (220) and a second connecting plate (230) are provided on the support plate (200); the first connecting plate (220) is vertically arranged on the support plate (200); the second connecting plate (230) is arranged at one end of the first connecting plate (220) away from the support plate (200) and extends in a direction parallel to the support plate (200); a threaded hole is provided on the second connecting plate (230); The limiting block (300) is located between the supporting plate (200) and the second connecting plate (230); an adjusting bolt (500) is screwed into the threaded hole, and the adjusting bolt (500) passes through the second connecting plate (230) and abuts against the limiting block (300).

4. The clamp according to claim 3, characterized in that There are two limit blocks (300), and the two limit blocks (300) are arranged on opposite sides of the detection hole (210); the second connecting plate (230) and the limit blocks (300) are arranged in a one-to-one correspondence.

5. The clamp according to claim 1, wherein: The clamp further comprises a first base (600), and the support plate (200) is movably arranged on the first base (600) along a first direction.

6. The clamp according to claim 5, characterized in that A first slide rail (610) is provided on the first base (600), a first slide groove is provided on the support plate (200), and the first slide rail (610) is slidably provided in the first slide groove.

7. The clamp according to claim 5, characterized in that The clamp further comprises a second base (700), on which the first base (600) is movably arranged along a second direction; the second direction is perpendicular to the first direction.

8. The clamp according to claim 7, characterized in that A second slide rail (710) is provided on the second base (700), a second slide groove is provided on the first base (600), and the second slide rail (710) is slidably provided in the second slide groove.

9. A detection device, characterized in that: It comprises a tensile testing machine and a fixture as claimed in any one of claims 1 to 8, wherein the tensile testing machine is arranged on a side of the support plate (200) close to the limit block (300); a pin (910) is arranged on the output end (900) of the tensile testing machine, and the output end (900) can be moved in a direction away from or close to the support plate (200) to drive the pin (910) to push or move away from the sealing pin (410) on the sample (400).

10. The detection device according to claim 9, characterized in that: The diameter of the ejector pin (910) is smaller than the diameter of the sealing pin (410).

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