Integrated device for detecting arc degree and wavy edge of battery pole piece

Abstract

The utility model discloses an integrated device for detecting the arc degree and the wavy edge of a battery pole piece, and the integrated device comprises a detection platform which is provided with an installation plane and a detection plane, the detection plane is lower than the installation plane, the installation plane and the detection plane are connected through a step surface, and the step surface is provided with an arc surface; the step surface extends along a first direction and is perpendicular to the detection plane; pressing blocks and scale marks are arranged on the detection plane, the scale marks are located in the middle of the detection plane in the first direction, and at least two pressing blocks are located on the two sides of the scale marks in the first direction; magnets in one-to-one correspondence with the pressing blocks are arranged in the detection table, and the pressing blocks have magnetism; the sliding mechanism is arranged on the mounting plane; the sensor is installed on the sliding mechanism and can move in the first direction and the second direction, and the second direction is perpendicular to the first direction. The integrated device is simple in structure, accurate in measurement result, stable in work and high in practicability.

Description

Technical Field

[0001] The present specification relates to the technical field of battery testing equipment, and in particular to an integrated device for detecting the curvature and wavy edges of battery pole pieces. Background Art

[0002] With the popularization and rapid development of electronic products such as electric vehicles, power tools, and smart phones, lithium-ion batteries, as a high-performance, high-energy-density energy storage device, have received widespread attention and application. In lithium-ion batteries, pole pieces, as an important component of the battery, undertake the important function of storing and releasing charge. The curvature and wavy edges of the pole pieces have an important impact on the performance of the battery. The curvature of the pole piece refers to the size of the curvature of the pole piece after bending under specific conditions. The wavy edge of the pole piece refers to the situation where the edge of the pole piece presents a wavy shape, that is, it presents an undulating protrusion or concave edge structure. The curvature and wavy edge of the pole piece need to be controlled within a certain range to ensure the performance and safety of the battery.

[0003] Under existing technical conditions, during the production process, after the battery pole piece is rolled, the middle and both sides of the pole piece coating area will have curvature and wavy edges on the side of the pole piece after slitting due to the difference in extension. Moreover, the longer the pole piece, the more difficult it is to ensure the curvature, resulting in uneven winding of the pole piece and excessive height; the wavy edges will cause abnormal winding correction or wrinkling, which will lead to poor pole piece quality or battery cell safety problems. Therefore, the detection of pole piece curvature and wavy edges is crucial.

[0004] In the prior art, the curvature and wave edge of the pole piece are generally detected manually offline. When detecting them, a steel ruler is used for calibration and detection. This steel ruler calibration and detection has the disadvantages of low detection accuracy and easy damage to the pole piece.

[0005] The specific detection method of curvature includes: first lay the electrode (1m length) flat on the inspection table; use tape to fix one side of the electrode, and after the electrode is straightened, use tape to fix the other side of the electrode; use a steel ruler to measure the maximum gap width close to the edge of the electrode, which is the curvature of the electrode. When the curvature is ≤1mm, it meets the production requirements. This detection method is cumbersome, time-consuming, easy to damage the electrode, and the steel ruler has low accuracy.

[0006] The specific detection method of the wave edge includes: first lay the electrode flat on the inspection table, press the entire electrode with a steel ruler; use the ruler to measure the wave height from the wave crest to the platform. The maximum value of the slitting wave height is ≤2.5mm, and the normal downward rotation is noted. The winding edge machine is produced. This detection method is time-consuming and uses the naked eye to observe the steel ruler scale, which has low accuracy. Utility Model Content

[0007] In view of the deficiencies of the prior art, an object of this specification is to provide an integrated device for detecting the camber and wavy edges of battery electrodes, which has a simple structure, accurate measurement results, stable operation, and strong practicability.

[0008] To achieve the above object, an embodiment of this specification provides an integrated device for detecting the camber and wavy edges of battery electrodes, including:

[0009] A detection table, the detection table has an installation plane and a detection plane, the detection plane is lower than the installation plane, the installation plane and the detection plane are connected by a stepped surface, and the stepped surface extends in a first direction and is perpendicular to the detection plane; a pressing block and a scale line are provided on the detection plane, the scale line is located in the middle of the detection plane in the first direction, and at least two pressing blocks are located on both sides of the scale line in the first direction; magnets corresponding to the pressing blocks one by one are provided in the detection table, and the pressing blocks have magnetism;

[0010] A sliding mechanism disposed on the installation plane;

[0011] A sensor installed on the sliding mechanism, the sensor can move along the first direction and the second direction, and the second direction is perpendicular to the first direction.

[0012] As a preferred embodiment, the sliding mechanism includes:

[0013] A sliding table and a first slide rail, both disposed on the installation plane and both extending along the first direction, and the sliding table and the first slide rail are spaced apart along the second direction;

[0014] A bracket disposed on the sliding table and the first slide rail, the bracket is slidably connected to the sliding table through a first slider, and the bracket is slidably connected to the first slide rail through a second slider; a second slide rail extending along the second direction is provided on the bracket, and the sensor is slidably connected to the second slide rail through a third slider.

[0015] As a preferred embodiment, the first slider is connected to a driving shaft, and the driving shaft extends along the first direction; one end of the driving shaft is connected to a handwheel, and the handwheel is configured to: rotating the handwheel can drive the driving shaft to drive the first slider to move along the first direction.

[0016] As a preferred embodiment, the material of the bracket is aluminum alloy and it is an integral structure.

[0017] As a preferred embodiment, the detection plane is located in the middle of the detection table in the second direction, and the two installation planes are located on both sides of the detection plane in the second direction; the number of the step surfaces is two; the lengths of the installation plane, the detection plane and the step surface in the first direction are all equal, and are equal to the length of the detection table in the first direction.

[0018] As a preferred embodiment, one side of the pressing block is attached to the step surface.

[0019] As a preferred embodiment, the number of the pressing blocks is four, two of the pressing blocks are attached to one step surface, and the other two pressing blocks are attached to the other step surface.

[0020] As a preferred embodiment, six groups of the scale lines are provided on the detection plane, three groups of the scale lines are connected to one step surface, and the other three groups of the scale lines are connected to the other step surface; the step surface is a detection reference surface and is aligned with the zero position of the scale line.

[0021] As a preferred embodiment, the detection plane is 5 mm lower than the installation plane.

[0022] As a preferred embodiment, the length of the detection table in the first direction is 1000 mm, the length in the second direction is 400 mm, and the maximum thickness is 25 mm; the total height of the integrated device is 145 mm.

[0023] Beneficial effects:

[0024] The integrated device for detecting the camber and wavy edge of the battery pole piece provided by this embodiment can detect the camber and wavy edge of the battery pole piece by setting the detection table, the sliding mechanism and the sensor. Specifically, two pressing blocks fix the pole piece on the detection plane, the edge of the pole piece is close to the step surface, and the camber of the pole piece can be read through the scale line; remove the pressing block, make the pole piece on the detection plane in a natural relaxation state, move the sensor installed on the sliding mechanism to the highest arching area of the pole piece, and the value read by the sensor is the measurement value of the wave height of the pole piece. This integrated device has a simple structure, accurate measurement results, stable operation and strong practicability.

[0025] Referring to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0026] Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with features in other embodiments, or instead of features in other embodiments.

[0027] It should be emphasized that the term "comprising / including" as used herein refers to the presence of features, whole units, steps or components, but does not exclude the presence or addition of one or more other features, whole units, steps or components. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic three-dimensional structure diagram of an integrated device for detecting the camber and wavy edges of battery electrodes provided in this embodiment;

[0030] Figure 2 For Figure 1 Top view;

[0031] Figure 3 For Figure 2 Left view;

[0032] Figure 4 For Figure 2 Cross-sectional view of plane A-A in

[0033] Figure 5 Schematic three-dimensional structure diagram of a bracket provided in this embodiment.

[0034] Explanation of Reference Numerals:

[0035] 1. Detection table; 11. Installation plane; 12. Detection plane; 13. Step surface; 14. Pressing block; 15. Scale line; 16. Magnet; 2. Sliding mechanism; 21. Slide table; 22. First slide rail; 23. Bracket; 24. Second slide rail; 25. First slider; 26. Second slider; 27. Third slider; 28. Driving shaft; 29. Handwheel; 3. Sensor; X. First direction; Y. Second direction. Detailed Embodiments

[0036] To enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be another element in the middle. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be another element in the middle at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present utility model. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] Please refer to Figures 1 to 4 The embodiment of the present application provides an integrated device for detecting the camber and wavy edges of battery electrodes, including a detection table 1, a sliding mechanism 2 and a sensor 3.

[0040] Among them, the detection table 1 has an installation plane 11 and a detection plane 12. The detection plane 12 is lower than the installation plane 11, and the installation plane 11 and the detection plane 12 are connected by a stepped surface 13. The stepped surface 13 extends along the first direction X and is perpendicular to the detection plane 12. A pressing block 14 and a scale line 15 are provided on the detection plane 12. The scale line 15 is located in the middle of the detection plane 12 in the first direction X, and at least two pressing blocks 14 are located on both sides of the scale line 15 in the first direction X. As Figure 4As shown in the figure, magnets 16 corresponding to the pressing blocks 14 one by one are provided inside the detection table 1, and the magnets 16 are located directly below the pressing blocks 14. The pressing blocks 14 are magnetic. When the pressing blocks 14 are placed above the magnets 16, the pressing blocks 14 are magnetically attracted and fixed, so that both ends of the pole piece can be fixed. The sliding mechanism 2 is arranged on the installation plane 11. The sensor 3 is installed on the sliding mechanism 2, and the sensor 3 can move along the first direction X and the second direction Y. The sensor 3 can emit a laser beam perpendicular to the detection plane 12 to realize displacement distance detection. The second direction Y is perpendicular to the first direction X, and both the first direction X and the second direction Y are parallel to the horizontal plane.

[0041] The integrated device for detecting the camber and wavy edge of the battery pole piece provided in this embodiment can detect the camber and wavy edge of the battery pole piece by setting the detection table 1, the sliding mechanism 2 and the sensor 3. Specifically, the two pressing blocks 14 fix the pole piece to the detection plane 12, the edges at both ends of the pole piece are closely attached to the step surface 13, and the middle part of the pole piece bends to a certain extent and is away from the step surface 13 due to the camber, and then the camber of the pole piece can be read through the scale line 15; remove the pressing blocks 14 to make the pole piece on the detection plane 12 in a natural relaxation state, move the sensor 3 installed on the sliding mechanism 2 to the highest arched area of the pole piece, and the value read by the sensor 3 is the measured value of the wave height of the pole piece. This integrated device has a simple structure, accurate measurement results, stable operation and strong practicability.

[0042] In this embodiment, the sliding mechanism 2 includes a sliding table 21, a first slide rail 22, and a bracket 23 arranged on the sliding table 21 and the first slide rail 22. Both the sliding table 21 and the first slide rail 22 are arranged on the installation plane 11 and extend along the first direction X. The sliding table 21 and the first slide rail 22 are arranged at intervals along the second direction Y. The bracket 23 is slidably connected to the sliding table 21 through a first slider 25, and the bracket 23 is slidably connected to the first slide rail 22 through a second slider 26. Thus, the bracket 23 can move along the first direction X on the sliding table 21 and the first slide rail 22, providing the degree of freedom of the first direction X for the sensor 3. A second slide rail 24 extending along the second direction Y is provided on the bracket 23, and the sensor 3 is slidably connected to the second slide rail 24 through a third slider 27. Thus, the sensor 3 can move along the second direction Y on the bracket 23. Specifically, the third slider 27 can be fixedly connected with a connecting plate, and the sensor 3 is fixedly connected with the connecting plate to realize the connection with the third slider 27.

[0043] As Figure 1As shown, a first slider 25 is connected to a drive shaft 28, and the drive shaft 28 extends along a first direction X. One end of the drive shaft 28 is connected to a handwheel 29, and the handwheel 29 is configured such that rotating the handwheel 29 can drive the drive shaft 28 to drive the first slider 25 to move along the first direction X, thereby driving the bracket 23 to move along the first direction X. By providing the handwheel 29 and the drive shaft 28, the smooth movement of the bracket 23 along the first direction X can be controlled. Specifically, the slide table 21, the drive shaft 28, and the first slider 25 can adopt a linear screw moving module, so that the transmission efficiency is high and the moving accuracy is high, in order to improve the detection accuracy.

[0044] Preferably, the material of the bracket 23 is aluminum alloy and it is an integral structure. As Figure 5 shown, the bracket 23 is not easily deformed, which can ensure a relatively high detection accuracy.

[0045] In a preferred embodiment, as Figure 2 shown, the detection plane 12 is located in the middle of the detection table 1 in the second direction Y, and the two mounting planes 11 are located on both sides of the detection plane 12 in the second direction Y. Thus, the number of step surfaces 13 is two, and two pole pieces can be detected simultaneously. The lengths of the mounting plane 11, the detection plane 12, and the step surface 13 in the first direction X are all equal and equal to the length of the detection table 1 in the first direction X. The upper surface of the detection table 1 only includes the mounting plane 11 and the detection plane 12, thereby making full use of the space on the detection table 1.

[0046] As Figure 3 shown, one side of the pressing block 14 (the side perpendicular to the second direction Y) is in contact with the step surface 13, so that the pole piece can be better fixed. Preferably, the number of pressing blocks 14 is four, and two of the pressing blocks 14 are in contact with one step surface 13, and the other two pressing blocks 14 are in contact with the other step surface 13. Thus, the integral device can simultaneously detect the camber of two pole pieces.

[0047] Furthermore, six groups of scale lines 15 are provided on the detection plane 12, where three groups of scale lines 15 are connected to one step surface 13, and the other three groups of scale lines 15 are connected to the other step surface 13. Among the three groups of scale lines 15 connected to one step surface 13, the middle scale line 15 is at the center of the detection plane 12 along the first direction X, and the intervals between adjacent two groups of scale lines 15 are equal.

[0048] In this embodiment, the detection plane 12 is 5 mm lower than the mounting plane 11. The formed step surface 13 provides a measurement standard for the detection of the pole piece. The step surface 13 is the detection reference surface and is aligned with the zero position of the scale line 15.

[0049] Specifically, the length of the detection table 1 in the first direction X is 1000 mm, the length in the second direction Y is 400 mm, and the maximum thickness is 25 mm. The total height of the integrated device is 145 mm. Its size is reasonably designed and it will not occupy too much space while having the detection function.

[0050] In a specific application scenario, when using the integrated device provided by the embodiment of the present application for detecting the camber and wavy edge of a battery pole piece to detect the camber of the pole piece, the steps are as follows:

[0051] ① Lay the slit pole piece (1 m in length) flat on the detection plane 12;

[0052] ② Align the center position of the pole piece with the midline of the scale line 15 at the middle position, and press the edge of the pole piece tightly against the step surface 13, so that a gap is formed between the center of the pole piece and the step surface 13;

[0053] ③ Use the pressing block 14 in cooperation with the magnet 16 to fix one side of the pole piece, and after straightening the pole piece, use the pressing block 14 to fix the other side of the pole piece;

[0054] ④ Visually read the maximum value among the scale values of the 3 scale lines 15, which is the camber measurement value;

[0055] ⑤ At another step surface 13, simultaneous detection can be achieved (that is, the cambers of two pole pieces are detected simultaneously).

[0056] In another specific application scenario, when using the integrated device provided by the embodiment of the present application for detecting the camber and wavy edge of a battery pole piece to detect the wavy edge of the pole piece, the steps are as follows:

[0057] ① After the camber detection result, remove the magnetic pressing block 14 to make the pole piece laid flat on the detection plane 12 in a natural relaxation state;

[0058] ② Move the sensor 3 to the blank area of the detection plane 12 to set zero;

[0059] ③ Shake the handwheel 29 of the sliding table 21 and the sliding sensor 3 to move the sensor 3 to the highest arched area of the pole piece (wave crest);

[0060] ④ Read the value displayed by the sensor 3, which is the wavy height measurement value of the pole piece;

[0061] ⑤ Perform multiple measurements and take the maximum value to reduce the measurement error.

[0062] By using the integrated device provided by the embodiment of the present application for detecting the camber and wavy edge of a battery pole piece, stable and reliable dimensions can be obtained during the pole piece detection process, without the need for traditional positioning and steel ruler measurement, thereby improving the detection efficiency and accuracy and saving labor.

[0063] It should be noted that in the description of this specification, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no sequence between them, nor can it be understood as indicating or implying relative importance. In addition, in the description of this specification, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0064] Any numerical values cited herein include all values from the lower value to the upper value increasing in units of one between the lower and upper limits, provided that there is an interval of at least two units between any lower value and any higher value. For example, if the value of the number of components or process variables (such as temperature, pressure, time, etc.) is stated as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the intention is to illustrate that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in this specification. For values less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples intended to be clearly expressed, and it can be considered that all possible combinations of the numerical values listed between the lowest and highest values are explicitly set forth in this specification in a similar manner.

[0065] Unless otherwise specified, all ranges include the endpoints and all the numbers between the endpoints. The "about" or "approximate" used in conjunction with a range applies to both endpoints of that range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0066] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" describing a combination should include the identified elements, ingredients, components, or steps, as well as other elements, ingredients, components, or steps that do not substantially affect the basic novel features of the combination. Using the terms "comprising" or "including" to describe the combinations of elements, ingredients, components, or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components, or steps. By using the term "may" herein, it is intended to indicate that any of the attributes described as "may" include are optional.

[0067] A plurality of elements, ingredients, components, or steps can be provided by a single integrated element, ingredient, component, or step. Alternatively, a single integrated element, ingredient, component, or step can be divided into separate multiple elements, ingredients, components, or steps. The disclosure of "a" or "an" used to describe an element, ingredient, component, or step does not mean to exclude other elements, ingredients, components, or steps.

[0068] It should be understood that the above description is for illustrative purposes and not for limitation. Upon reading the above description, many embodiments and many applications beyond the provided examples will be apparent to those skilled in the art. Therefore, the scope of this teaching should not be determined with reference to the above description, but rather should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled. For the sake of completeness, all articles and references, including patent applications and published disclosures, are incorporated herein by reference. Omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the inventor has not considered such subject matter to be part of the disclosed utility model subject matter.

Claims

1. An integrated device for detecting the curvature and wave edge of a battery pole piece, characterized in that: include: A detection platform, the detection platform having a mounting plane and a detection plane, the detection plane being lower than the mounting plane, the mounting plane and the detection plane being connected by a step surface, the step surface extending along a first direction and being perpendicular to the detection plane; a pressing block and a scale line are provided on the detection plane, the scale line is located in the middle of the detection plane in the first direction, and at least two of the pressing blocks are located on both sides of the scale line in the first direction; magnets corresponding to the pressing blocks are provided in the detection platform, and the pressing blocks have magnetism; A sliding mechanism disposed on the mounting plane; The sensor is mounted on the sliding mechanism, and the sensor can move along the first direction and a second direction, wherein the second direction is perpendicular to the first direction.

2. The integrated device for detecting the curvature and wavy edge of a battery pole piece according to claim 1, characterized in that: The sliding mechanism comprises: The slide table and the first slide rail are both arranged on the installation plane and extend along the first direction, and the slide table and the first slide rail are spaced apart along the second direction; A bracket is arranged on the slide table and the first slide rail, the bracket is slidably connected to the slide table through a first slider, and the bracket is slidably connected to the first slide rail through a second slider; a second slide rail extending along the second direction is provided on the bracket, and the sensor is slidably connected to the second slide rail through a third slider.

3. The integrated device for detecting the curvature and wavy edge of a battery pole piece according to claim 2, characterized in that: The first slider is connected to a driving shaft, and the driving shaft extends along the first direction; one end of the driving shaft is connected to a hand wheel, and the hand wheel is configured such that: rotating the hand wheel can drive the driving shaft to drive the first slider to move along the first direction.

4. The integrated device for detecting the curvature and wavy edge of a battery pole piece according to claim 2, characterized in that: The bracket is made of aluminum alloy and has an integrated structure.

5. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 1, characterized in that: The detection plane is located in the middle of the detection platform in the second direction, and the two installation planes are located on both sides of the detection plane in the second direction; the number of the step surfaces is two; the lengths of the installation plane, the detection plane and the step surface in the first direction are equal, which is equal to the length of the detection platform in the first direction.

6. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 5, characterized in that: One side of the pressing block is in contact with the step surface.

7. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 6, characterized in that: There are four pressing blocks, two of which are in contact with one step surface, and the other two pressing blocks are in contact with another step surface.

8. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 5, characterized in that: Six groups of scale lines are arranged on the detection plane, of which three groups of scale lines are connected to one step surface, and the other three groups of scale lines are connected to another step surface; the step surface is a detection reference surface, which is aligned with the zero position of the scale lines.

9. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 1, characterized in that: The detection plane is 5 mm lower than the installation plane.

10. The integrated device for detecting the curvature and wave edge of a battery pole piece according to claim 1, characterized in that: The length of the detection platform in the first direction is 1000 mm, the length in the second direction is 400 mm, and the maximum thickness is 25 mm; the total height of the integrated device is 145 mm.

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