Measuring device

Abstract

The utility model discloses a measuring device, which is used for measuring the length of exposed insulation paper at the end part of a roll core, and comprises a main body and at least one measuring structure arranged on the main body, the measuring structure comprises a positioning piece and a length measuring piece, the positioning piece is used for extending into a hole part at the center of the roll core, and the length measuring piece is used for measuring the length of the insulation paper. And the length measuring piece is used for measuring the length of the insulation paper exposed relative to the roll core. The measuring device provided by the utility model can quickly measure the exposed length of the insulation paper, thereby improving the test efficiency and ensuring the productivity of a production line.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to a measuring device. BACKGROUND

[0002] In the production and manufacturing process of lithium battery, in order to avoid the contact of positive and negative pole piece and aluminum shell, after the winding of the core is completed, a circle of insulating glue is pasted on the periphery of the winding core, so as to separate the tab and the aluminum shell through the insulating glue, therefore, the consistency of the exposed length of the adhesive paper relative to the winding core is related to the quality and safety of the battery core.

[0003] In the prior art, the exposed length of the adhesive paper is generally measured by using CCD measurement or optical lens instrument measurement. However, when using CCD measurement, the CCD camera can only shoot the outer surface of the adhesive paper, and cannot penetrate the adhesive paper to the inner surface, so that the width of the entire adhesive paper is recorded, thereby causing the inaccuracy of measurement. When using optical lens instrument measurement, the winding core needs to be taken off from the production line and taken to a special laboratory for measurement by a special test personnel, which is complicated and time-consuming, reduces the equipment utilization rate and restricts the production capacity. UTILITY MODEL CONTENT

[0004] To solve at least one problem existing in the prior art, according to one aspect of the utility model, a measuring device is provided for measuring the length of the exposed insulating paper at the end of the winding core, comprising:

[0005] A main body and at least one measuring structure provided on the main body, the measuring structure comprising a positioning member and a length measuring member, the positioning member being used to extend into the hole part in the center of the winding core, and the length measuring member being used to measure the length of the exposed insulating paper relative to the winding core.

[0006] In some embodiments, the measuring device comprises two measuring structures, which are defined as a first measuring structure and a second measuring structure, respectively, the first measuring structure and the second measuring structure are respectively provided at two ends of the main body along the length direction of the main body, the first length measuring member in the first measuring structure is used for rough measurement of the length of the exposed insulating paper relative to the winding core, and the second length measuring member in the second measuring structure is used for precise measurement of the length of the exposed insulating paper relative to the winding core.

[0007] In some embodiments, the first length measuring member is provided on the first positioning member of the first measuring structure, and comprises a plurality of positioning tables sequentially connected along the axial direction of the main body, and the widths of the plurality of positioning tables along the radial direction of the main body are different.

[0008] In some embodiments, the width of the plurality of positioning platforms in the radial direction of the main body gradually increases towards the main body.

[0009] In some embodiments, the surface of each positioning platform is coated with a coating, and the coating on the surface of each positioning platform is different in color.

[0010] In some embodiments, each positioning platform is in the shape of a column.

[0011] In some embodiments, the length of the positioning platform away from the main body in the axial direction of the main body is greater than the length of the remaining positioning platforms in the axial direction of the main body.

[0012] In some embodiments, the second length measuring member is provided on the outer wall of the main body, the main body can extend into the surrounding space of the insulation paper, and the second length measuring member is provided with a scale line.

[0013] In some embodiments, the end of the first positioning member of the first measuring structure and / or the end of the second positioning member of the second measuring structure is a pointed end.

[0014] In some embodiments, the measuring structure and the main body are integrally provided.

[0015] In summary, the measuring device provided by the present application has the following technical effects:

[0016] By inserting the positioning member into the hole in the center of the core, the length of the exposed insulation paper can be quickly obtained by the length measuring member, improving the measurement efficiency. At the same time, during measurement, the cores can be placed on the conveyor belt one by one for measurement, without the need to pause the production line, ensuring production capacity. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view of a core according to an embodiment of the present application;

[0018] Figure 2 FIG. 2 is a structural schematic view of the core in FIG. 1; Figure 1

[0019] Figure 3 FIG. 5 is a structural schematic view of the measuring device according to an embodiment of the present application from another perspective;

[0020] Figure 4 FIG. 6 is a structural schematic view of the measuring device in FIG. 5 from another perspective; Figure 3

[0021] FIG. 7 is a first use state reference view of the measuring device in FIG. 5; Figure 5 Figure 3 FIG. 8 is a second use state reference view of the measuring device in FIG. 5.​​

[0022] Figure 6 for Figure 3 a second use state of the measuring device in FIG.

[0023] Figure 7 for Figure 5 an enlarged schematic view of I in FIG.

[0024] Figure 8 for Figure 3 a third use state of the measuring device in FIG.

[0025] Figure 9 for Figure 3 a fourth use state of the measuring device in FIG.

[0026] Figure 10 for Figure 9 an enlarged schematic view of II in FIG.

[0027] Figure 11 for a flowchart of the measuring method of the embodiment of the present application.

[0028] FIG. 100-measuring device, 10-main body, 20-measuring structure, 21-positioning member, 211-end, 22-length measuring member, 221-positioning table, 222-scale line, 200-winding core, 210-negative tab, 220-positive tab, 230-insulating paper, 231-first section, 232-second section, 240-hole part, 250-end face. DETAILED DESCRIPTION

[0029] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0030] In the description of the present application, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0032] The utility model will be further described in detail below with reference to the drawings.

[0033] Embodiment one

[0034] Please refer to Figure 1 And Figure 2 The core 200 will form a hole part 240 in the center after winding, and will wrap one circle of insulating paper 230 at both ends of the core 200, so as to separate the positive and negative pole ears 220 and 210 from the shell respectively, to avoid short circuit. After the winding of the insulating paper 230 is completed, a part of the insulating paper 230 is higher than the end surface 250 of the core 200, that is, as an exposed part, and a part covers the positive or negative pole ear 220 or 210.

[0035] Specifically, please refer to Figure 2 The insulating glue includes two sections along the axial direction of the core 200: the first section 231 and the second section 232, the first section 231 is wrapped outside the core 200, and this part covers the positive or negative pole ear 220 or 210, and the second section 232 is exposed relative to the end surface 250 of the core 200, and then the exposed second section 232 is flattened to the end surface 250 of the core 200, and the positive and negative pole ears 210 are welded to the current collector plate respectively.

[0036] In the production process, if the length of the exposed insulating paper 230 is too long, the current collector plate and the positive and negative pole ears 210 will not be in good contact, and if the length of the exposed insulating paper 230 is too short, the pole ear cannot be covered, which will affect the product quality. Therefore, the length of the second section 232 of the exposed insulating paper 230 needs to be measured. However, the measurement method of CCD or the measurement method of optical lens instrument in the prior art cannot quickly obtain the length, which affects the production capacity.

[0037] Therefore, in order to quickly measure the exposed length of the insulating paper 230, please refer to Figures 3 to 10 The measuring device 100 provided by the utility model embodiment comprises a main body 10 and at least one measuring structure 20 arranged on the main body 10.

[0038] Among them, please refer to Figure 3 And Figure 4 The measuring structure 20 comprises a positioning piece 21 and a length measuring piece 22, the positioning piece 21 is used for extending into the hole part 240 in the center of the core 200, and the length measuring piece 22 is used for measuring the exposed length of the insulating paper 230 relative to the core 200.

[0039] The measuring device 100 can be inserted into the hole portion 240 in the center of the winding core 200 through the positioning member 21, and the length of the exposed insulation paper 230 can be quickly obtained through the length measuring member 22, thereby improving the measuring efficiency. Meanwhile, the winding core 200 can be placed on the conveying belt for measurement one by one, and the production line does not need to be stopped, thereby ensuring the production capacity.

[0040] In the measurement of the winding core 200, a plurality of positioning jigs can be placed on the conveying belt in sequence, and each positioning jig is used for placing the winding core 200 for positioning, so that the winding core 200 can be conveyed one by one from the conveying belt. The worker holds the measuring device 100 by hand, inserts the positioning member 21 of the measuring device 100 into the hole portion 240 of the winding core 200, and then quickly measures the exposed length of the insulation paper 230 through the length measuring member 22. After the measurement is completed, the worker can measure at the work station without taking the winding core 200 to a special laboratory, and the production line does not need to be stopped, thereby having higher production efficiency, improving the production capacity, and quickly and accurately obtaining the result through the length measuring member 22.

[0041] Specifically, in the measurement, the worker slowly pushes the positioning member 21 into the hole portion 240 of the winding core 200 by hand, so that the positioning member 21 completely enters the hole portion 240, and then places the winding core 200 and the measuring device 100 on a horizontal plane, looks down from the eye, and quickly obtains the corresponding result of the exposed length of the insulation paper 230 according to the length measuring member 22.

[0042] In this embodiment, the body is in a columnar shape, and in other embodiments, it can also be in a square, rhombic, triangular, polygonal or other structure, which is not limited herein.

[0043] Please refer to the drawings. In an embodiment of the present application, in order to provide different measurement methods, the measuring device 100 includes two measurement structures 20, which are defined as a first measurement structure a and a second measurement structure b. The first measurement structure a and the second measurement structure b are respectively arranged at two ends of the main body 10 along the length direction of the main body 10. The first length measuring member in the first measurement structure a is used for rough measurement of the exposed length of the insulation paper 230 relative to the winding core 200, and the second length measuring member in the second measurement structure b is used for precise measurement of the exposed length of the insulation paper 230 relative to the winding core 200. That is, the length measuring members 22 in the two measurement structures 20 can be arranged in different structures to quickly obtain rough measurement results or precise measurement results, thereby meeting the needs of different winding core 200 production.

[0044] For example, in one embodiment, when the production line is always the first type of core 200, because the exposed length of the insulation paper 230 of the same type of core 200 is basically the same, only a slight difference, for example, when the difference between the exposed length of the insulation paper 230 and the standard value is within the range of ±(0.5-1mm), it meets the production requirements, therefore, the way of fast measurement by the first length measuring element can improve production efficiency; but after the production line is changed, because the type of the core 200 is changed, the difference of the exposed length of the insulation paper 230 is larger, and the second length measuring element needs to be used to accurately measure whether the exposed length is within the preset error range.

[0045] Specifically, referring to Figure 3 and Figures 7 to 9 The first length measuring element of the embodiment is arranged on the first positioning element 21, and includes a plurality of positioning tables 221 which are sequentially connected in the axial direction of the main body 10, and the widths of the plurality of positioning tables 221 in the radial direction of the main body 10 are different, that is, each positioning table 221 has its own width, after the first positioning element 21 is inserted into the hole portion 240 of the core 200, the end face of the insulation paper 230 is located at a certain positioning table 221, that is, the exposed length of the insulation paper 230 can be quickly judged, and if it corresponds to the preset positioning table 221, the quality of the core 200 can be quickly judged; that is, by arranging positioning tables 221 with different widths, the exposed length of the insulation paper 230 can be quickly judged when the insulation paper 230 is aligned with the positioning table 221, and the test efficiency is improved. In one embodiment, when the positioning tables 221 with different widths are arranged, the corresponding central angle of the positioning table 221 can be less than 360 degrees, for example, 30 degrees, 45 degrees or 60 degrees, and the plurality of positioning tables 221 can be arranged in the axial direction of the first positioning element 21 in a staggered manner along the length direction of the main body 10, which can also help to improve the judgment efficiency.

[0046] It can be understood that the more the number of positioning tables 221 is arranged, and the smaller the height of each positioning table 221 in the length direction of the main body 10 is, the more accurate the judgment is.

[0047] In one embodiment of the utility model, when a plurality of positioning tables 221 are arranged in the length direction of the main body 10, the width of the plurality of positioning tables 221 in the radial direction of the main body 10 can be arranged in a gradually increasing manner towards the main body 10, that is, the wider the positioning table 221 in the radial direction of the positioning element 21 is, the closer to the main body 10, and gradually close to the width of the main body 10, so that the width of the positioning table 221 is arranged in a regular manner, which is convenient for the molding of the plurality of positioning tables 221 and the main body 10.

[0048] Specifically, each positioning table 221 of the embodiment is columnar, i.e. surrounds the positioning member 21 by 360 degrees, which can improve the structural strength of the positioning member 21.

[0049] Further, in order to improve the judgment efficiency during measurement, the surface of each positioning table 221 is coated with a coating, and the color of the coating on the surface of each positioning table 221 is different. In this way, by coating the positioning table 221 with color, the color can bring a visual impact to the eyes, so that the length of the insulation paper 230 can be quickly roughly judged according to the color of the positioning table 221, whether it is within the preset standard range, thereby improving the measurement efficiency. For example, in an embodiment, when three positioning tables 221 are provided, the positioning tables 221 can be coated with yellow, green and red in turn in the direction gradually approaching the main body 10. It should be noted that the color of the positioning table 221 can be set as needed, which is not limited herein.

[0050] The measurement structure 20 and the main body 10 are integrally provided, i.e. the positioning table 221, the positioning member 21 and the main body 10 can be molded by integral molding when being provided, so as to improve the molding efficiency and ensure the structural strength; in other embodiments, the components can also be connected by welding or bonding, which is not limited herein.

[0051] Please refer to Figure 3 and Figures 7 to 9 In an embodiment of the utility model, since the positioning member 21 is inserted into the hole portion 240 of the winding core 200, the positioning table 221 farthest from the main body 10 is usually covered by the exposed insulation paper 230, therefore, the length of the positioning table 221 farthest from the main body 10 along the axial direction of the main body 10 is greater than the length of the remaining positioning tables 221 along the axial direction of the main body 10, i.e. the length of the positioning table 221 close to the winding core 200 is the longest, and the positioning table 221 is usually not used for judging the length of the insulation paper 230, therefore, the length of the positioning table 221 is set to be the longest, which can increase the structural strength of the positioning member 21.

[0052] It can be understood that when the first positioning member 21 is inserted into the hole portion 240, the end surface of the first positioning table 221 farthest from the main body 10 abuts against the end surface 250 of the winding core 200, at this time, the measurement device 100 stops the insertion action, and the exposed length of the insulation paper 230 can be roughly judged.

[0053] Please refer to Figures 4 to 6 and Figures 8 to 10As a structure diagram of the second measuring structure b in an embodiment of the utility model, in order to be able to accurately measure the length of the exposed part of the insulation paper 230, the second length measuring piece is arranged on the outer wall of the main body 10, the main body 10 can be inserted into the space surrounded by the insulation paper 200, the second length measuring piece is provided with a scale line 222, that is, when the second measuring structure measures the length of the insulation paper 230, with the second positioning piece 21 inserted into the hole part 240, the main body 10 is also inserted into the space surrounded by the insulation paper 230 synchronously, the end of the main body 10 abuts against the end face 250 of the winding core 200, at this time, the length of the insulation paper 230 can be obtained by reading the scale line 222 on the main body 10, and the accuracy of the length of the insulation paper 230 can be more accurately judged. For example, this test method is used after the production line changes the battery model, the exposed length of the insulation paper 230 will also change greatly, at this time, the scale line 222 is used for accurate measurement, the accuracy of length judgment is improved, after the initial accurate measurement is completed, the first measuring structure a can be used for subsequent rapid measurement.

[0054] It can be understood that when the end is measured, the outer diameter of the main body 10 is smaller than the inner diameter size of the insulation paper 230, so that the main body 10 can be inserted into the space surrounded by the insulation paper 230.

[0055] It can be understood that when the end is measured, the outer diameter of the main body 10 is smaller than the inner diameter size of the insulation paper 230, so that the main body 10 can be inserted into the space surrounded by the insulation paper 230.

[0056] It can be understood that the end 211 of the first positioning piece can be provided as a pointed end, or the end 211 of the second positioning piece can be provided as a pointed end, or the ends 211 of the first positioning piece and the second positioning piece are all provided as pointed ends.

[0057] Further, the shape of the pointed end can be set as a conical shape, a spherical shape, an oval shape and the like, which can all realize the effect of guiding.

[0058] Further, when the preparation material of the entire measuring device 100 is selected, since the foil material of the winding core 200 includes copper, aluminum and is coated with lithium iron phosphate and the like, therefore, the material of the measuring structure 20 and the main body 10 should avoid using copper, aluminum and lithium iron and the like, so that the main body 10 and the two measuring structures 20 can use ceramic or stainless steel material with plating layer on the surface, to avoid touching the material of the winding core 200.

[0059] The measuring device 100 can insert the first positioning member or the second positioning member into the hole portion 240 of the winding core 200 through the hand, and quickly and roughly obtain the length dimension of the insulation paper 230 through the positioning table 221 in the first measuring structure a; or accurately read the length value through the scale line 222 in the second measuring member structure b. Thus, the two ways are:

[0060] (1) The length of the insulation paper 230 can be quickly judged on the production line, without the need to separate the winding core 200 from the production line for a long time, without the need to stop the machine, to ensure the production capacity and the production efficiency;

[0061] (2) The situation that the CCD is misjudged when the color of the insulation paper 230 and the end adhesive of the winding core 200 is similar is avoided;

[0062] (3) The length result can be obtained in time, and the test efficiency is high;

[0063] (4) The result can be quickly obtained through the first measuring structure a or the second measuring structure b, which is direct and does not need to be converted;

[0064] (5) The measuring device 100 of the embodiment has a simple structure and low manufacturing cost;

[0065] (6) The worker on the spot can complete it, without the need of a high-skilled tester, to reduce the company's labor cost;

[0066] (7) Since the winding core 200 does not need to be moved away from the production line, the situation that the winding core 200 is damaged due to collision after being moved away from the production line is avoided.

[0067] Embodiment two

[0068] Please refer to Figure 2 The utility model also provides a kind of measuring method 300 of insulation paper 230 exposed length in the second embodiment, for measuring the length of insulation paper 230 exposed to relative winding core 200, including the following steps:

[0069] S31, holding the main body 10.

[0070] For example, the main body 10 is held by hand or mechanical hand, so that the whole measuring device 100 can be moved in the subsequent.

[0071] Specifically, the main body 10 is held by the hand of worker in the embodiment, so that the worker can accurately align by eye.

[0072] S32, positioning member 21 is inserted into the hole portion 240 in the center of winding core 200.

[0073] After the body 10 is fixed in the previous step, the positioning member 21 is inserted into the hole 240 in the center of the core 200 in this step. According to the accurate length data or rough judgment, the first positioning member or the second positioning member is optionally inserted into the core 200.

[0074] S33, the length of the insulation paper 230 exposed relative to the core 200 is judged by the length measuring member 22.

[0075] When the first positioning member or the second positioning member is inserted into the core 200, the coincidence of the first positioning member or the second positioning member and the central axis of the core 200 is ensured, and the rough or accurate judgment of the length of the insulation paper 230 exposed is performed by the positioning table 221 in the first measuring structure a or the scale line 222 in the second measuring structure b.

[0076] Further, if the measured length of the insulation paper 230 exposed does not meet the standard, the attachment position of the insulation paper 230 needs to be adjusted, and after the adjustment, the measurement step is performed again. If the measurement result is qualified, the core 200 is returned to the production line for the next production step.

[0077] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above-mentioned embodiments, and also includes the technical scheme composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A measuring device (100) for measuring the length of exposed insulation paper (230) at the end of a core (200), characterized in that, The measuring device (100) comprises two measuring structures (20), which are defined as a first measuring structure and a second measuring structure, respectively. The first length measuring element in the first measuring structure is used for rough measurement of the length of the insulation paper (230) exposed relative to the winding core (200), and the second length measuring element in the second measuring structure is used for fine measurement of the length of the insulation paper (230) exposed relative to the winding core (200).

2. The measuring device (100) according to claim 1, characterized in that The first length measuring element is arranged on the first positioning element of the first measuring structure and comprises a plurality of positioning platforms (221) sequentially connected in the axial direction of the main body (10).

3. The measuring device (100) according to claim 2, characterized in that The widths of the plurality of positioning platforms (221) in the radial direction of the main body (10) are different.

4. The measuring device (100) according to claim 3, characterized in that The widths of the plurality of positioning platforms (221) in the radial direction of the main body (10) gradually increase in the direction close to the main body (10).

5. The measuring device (100) according to claim 3 or 4, characterized in that The surfaces of the positioning platforms (221) are coated with a coating, and the colors of the coating on the surfaces of the positioning platforms (221) are different.

6. The measuring device (100) according to claim 3 or 4, characterized in that Each of the positioning platforms (221) is in a columnar shape.

7. The measuring device (100) according to claim 3 or 4, characterized in that The length of the positioning platform (221) away from the main body (10) in the axial direction of the main body (10) is greater than the lengths of the remaining positioning platforms (221) in the axial direction of the main body (10).

8. The measuring device (100) according to claim 3 or 4, characterized in that The second length measuring element is arranged on the outer wall of the main body (10), and the main body (10) can extend into the surrounding space of the insulation paper (230), and the second length measuring element is provided with a scale line (222).

9. The measuring device (100) according to any one of claims 2-4, characterized in that, The end portion (211) of the first positioning element of the first measuring structure and / or the end portion (211) of the second positioning element of the second measuring structure is a pointed end.

10. The measuring device (100) according to any one of claims 1 to 4, characterized in that The measuring structure (20) and the main body (10) are integrally arranged.

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