A wave size measuring fixture for wavy objects

Abstract

This utility model relates to the technical field of measuring the size of wavy objects, and discloses a fixture for measuring the wave size of wavy objects, including a test frame and a force-applying object; the force-applying object is connected to the test frame or separately disposed from the test frame, the test frame includes a support plate extending longitudinally for supporting the wavy object, the force-applying object is configured to be disposed on the side of the support plate opposite to the wavy object, the force-applying object is used to act on the bottom or top of the wavy object, and to make the wavy object fit against the support plate in a longitudinally stretched state; this solution can significantly reduce the influence of the self-weight of the wavy area on the wave size measurement, more accurately represent the true data of the wavy area, provide more accurate factual basis for guiding the subsequent production of electrode sheets and formulating production standards, thereby helping to reduce the impact of the wavy electrode sheet production process on the yield of subsequent winding into battery cells.

Description

Technical Field

[0001] This utility model relates to the technical field of measuring the size of wavy objects, and in particular to a jig for measuring the wave size of wavy objects. Background Technology

[0002] In the manufacturing process of battery electrodes, an active slurry is first uniformly coated on both sides of an aluminum or copper current collector according to a certain areal density. Then, after baking to remove the solvent from the slurry, the electrode sheet is formed. Next, the rolled electrode sheet is rolled to a specified thickness, then slit into multiple pieces and the tabs are cut out. During the entire electrode manufacturing process, the electrode sheet will have different elongation, which will cause the electrode sheet to have a wavy extension. The excessively large wavy size of the electrode sheet will affect the yield and quality of the subsequent winding of the electrode sheet into the battery cell product.

[0003] Because the electrode sheets are under tension during both the winding process and use, to improve the accuracy of the electrode sheet waviness measurement, the electrode sheet is currently subjected to tension before measurement. Please refer to [link to relevant documentation]. Figure 1 The current method for measuring the wave size of electrode sheets is as follows: Take an electrode sheet of a specified length (e.g., 1000mm), place it flat on a measuring platform, and then weigh one end of the electrode sheet down with a heavy object. Suspend a standard weight of 200g to 500g (i.e., the suspended weight is actually the tensile force on the wound electrode sheet) from that end. Then, smooth the electrode sheet, allowing it to extend more naturally towards the weight end. Finally, use measuring tools (e.g., feeler gauge, film ruler) to measure the area with the largest wave height along the entire electrode sheet, thus obtaining the maximum wave height and length data. However, this current method does not consider the weight of the wave segment itself, resulting in inaccurate measurements of wave height and length. Specifically, the measured wave height and length will be underestimated, especially when the wave is large, leading to a greater error compared to the actual values. Utility Model Content

[0004] This utility model provides a wave size measuring fixture for wavy objects, mainly solving the technical problem of how to more accurately measure the wave size (wave height or length) of wavy objects.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wave size measuring fixture for a wavy object includes a test frame and a force-applying object; the force-applying object is connected to the test frame or is separately disposed from the test frame, the test frame includes a support plate extending longitudinally for supporting the wavy object, the force-applying object is configured to be disposed on the side of the support plate opposite to the wavy object, the force-applying object is used to act on the bottom or top end of the wavy object, and to make the wavy object conform to the support plate in a longitudinally stretched state.

[0007] In one technical solution, the force-applying object includes a first weight and a second weight of equal weight. The first weight acts on the top of the wave-shaped object and applies an upward force to the portion of the wave-shaped object that is attached to the support plate. The second weight acts on the bottom of the wave-shaped object and applies a downward force to the portion of the wave-shaped object that is attached to the support plate. Both the first weight and the second weight are arranged on the side of the support plate opposite to the wave-shaped object, so that the wave-shaped object can be attached to the support plate in a longitudinally stretched state after being subjected to the forces of the first weight and the second weight.

[0008] In one of the technical solutions, the test frame further includes a frame body, a first rotating roller, and a second rotating roller;

[0009] The support plate is fixedly connected to the frame. The first rotating roller and the second rotating roller are both rotatably connected to the frame or the support plate and their rotation axes both point to the horizontal direction. The first rotating roller and the second rotating roller are both located on the side of the support plate facing away from the wavy object. The first rotating roller is higher than the support plate and the second rotating roller is lower than the support plate.

[0010] The first weight is used to pull the top of the wave-shaped object downwards to abut against the first rotating roller, so that the part of the wave-shaped object that is attached to the support plate can be subjected to an upward force.

[0011] The second weight is used to pull the bottom of the wave-shaped object downwards to abut against the second rotating roller, so that the part of the wave-shaped object that is attached to the support plate can be subjected to a downward force.

[0012] In one of the technical solutions, the top end of the support plate that contacts the wavy object is provided with a first rounded corner.

[0013] In one of the technical solutions, the bottom end of the support plate that contacts the wavy object is provided with a second rounded corner.

[0014] In one of the technical solutions, the frame is provided with a clearance space below the first rotating roller for avoiding the first heavy object.

[0015] In one of the technical solutions, the frame includes a base plate, uprights, and two crossbars;

[0016] The upright is fixed to the base plate, and both horizontal bars are fixedly connected to the upright and to the support plate. Both horizontal bars are located between the first rotating roller and the second rotating roller, and the clearance space is formed between the two horizontal bars.

[0017] In one of the technical solutions, both the first weight and the second weight are weights.

[0018] In one of the technical solutions, the measuring fixture further includes a fixing block, which is used together with the support plate to clamp and fix one end of the wavy object;

[0019] The force-applying object includes a third weight, which acts on the end of the wave-shaped object away from the fixed block, and is arranged on the side of the support plate opposite to the wave-shaped object, so that the wave-shaped object can be longitudinally stretched and adhered to the support plate after being subjected to the force of the third weight.

[0020] In one of the technical solutions, the third weight is a weight.

[0021] Compared with the prior art, the wave size measuring fixture for wavy objects provided by this utility model has at least the following beneficial effects:

[0022] This solution uses a longitudinally extending support plate and a force-applying object placed on one side of the support plate. This allows the wavy object to be stretched longitudinally and adhered to the support plate under the force of the applied force. Taking a wavy battery electrode as an example, with this solution, since the direction of gravity g on the wavy area of ​​the electrode is parallel to the extension direction of the support plate, the measurement results of the wave height and wave length dimensions of the wavy area on the electrode are not affected by the self-weight of the wavy area. In other words, this solution can significantly reduce the influence of the self-weight of the wavy area on the wave size measurement. This solution can more accurately represent the true data of the wavy area on the electrode, providing more accurate factual basis for guiding subsequent electrode production and formulating production standards. This helps to reduce the impact of the wavy electrode production process on the yield of subsequent winding into battery cells, thereby improving the yield of wound battery cells and reducing the manufacturing cost of battery cells. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a horizontally stretched electrode sheet provided by existing technology;

[0025] Figure 2 A schematic diagram of the structure of a test fixture for measuring the wave size of a wave-shaped object, provided in an embodiment of this application;

[0026] Figure 3 A side view of a test fixture for measuring the wave size of a wave-shaped object, provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the first structure after the electrode is placed on the test fixture of this application embodiment;

[0028] Figure 5 This is a schematic diagram of a second structure after the electrode is placed on the test fixture of this application embodiment;

[0029] Figure 6 This is a schematic diagram of a third structure after the electrode is placed on the test fixture of this application embodiment.

[0030] Figure label:

[0031] 1. Test frame; 11. Support plate; 111. First rounded corner; 112. Second rounded corner; 12. Frame body; 121. Base plate; 122. Upright pole; 123. Horizontal bar; 13. First rotating roller; 14. Second rotating roller; 15. Clearance space; 2. Object applying force; 21. First weight; 22. Second weight; 23. Third weight; 3. Electrode; 4. Fixing block. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] Please refer to the following: Figures 2 to 4 This utility model provides a fixture for measuring the wave size of a wavy object. The fixture mainly includes a test frame 1 and a force-applying object 2. The test frame 1 includes a support plate 11 extending longitudinally and used to support the wavy object laterally. In this embodiment, the wavy object is taken as a battery electrode 3. The force-applying object 2 acts on the bottom or top of the electrode 3 and is positioned on the side of the support plate 11 facing away from the electrode 3, causing the electrode 3 to be longitudinally stretched and adhered to the support plate 11. Specifically, the force-applying object 2 can be configured as follows: Figures 2 to 4 As shown, the test frame 1 is set separately. For example, the force-applying object 2 is a weight with a standard weight. The weight of the weight stretches the electrode 3, causing the electrode 3 to be attached to the support plate 11 in a longitudinally stretched state. The force-applying object 2 can also be a structural design connected to the test frame 1. For example, the force-applying object 2 can be a driver. The driver drives the electrode 3 to stretch, causing the electrode 3 to be attached to the support plate 11 in a longitudinally stretched state.

[0038] The following two more specific embodiments illustrate how the force-applying object 2 specifically achieves the goal of making the electrode 3 adhere to the support plate 11 in a longitudinally stretched state:

[0039] Specific Implementation Example 1: Please refer to the following: Figures 2 to 4The force-applying object 2 includes two equal weights, a first weight 21 and a second weight 22. Preferably, the first weight 21 and the second weight 22 are weights of standard weight. The first weight 21 acts on the top of the electrode 3 and applies an upward oblique force to the portion of the electrode 3 that adheres to the support plate 11. Figure 4 The tension L1 shown in the figure, the second weight 22 acts on the bottom end of the electrode 3 and applies a downward oblique force to the part of the electrode 3 that is attached to the support plate 11 (this force is...). Figure 4 As shown in the figure, the first weight 21 and the second weight 22 are both arranged on the side of the support plate 11 away from the electrode 3, so that the tension L1 and the tension L2 are both directed towards the inside of the support plate 11, so that the electrode 3 can be attached to the support plate 11 in a longitudinally stretched state after being subjected to the forces of the first weight 21 and the second weight 22 at the same time.

[0040] Specific Implementation Example 2: Please refer to Figure 5 and Figure 6 The measuring fixture also includes a fixing block 4, which, together with the support plate 11, clamps one end of the fixed electrode 3. The fixing block 4 and the support plate 11 can be connected by screws or clips. The force-applying object 2 also includes a third weight 23, which is preferably a weight. The third weight 23 is used to act on the end of the electrode 3 away from the fixing block 4 (i.e., when the fixing block 4 is in the direction of the fixed electrode 3). Figure 5 When the third weight 23 is fixed at the top of the electrode 3, it acts on the bottom of the electrode 3; when the fixing block 4 is fixed as shown, it acts on the bottom of the electrode 3. Figure 6 When fixed at the bottom of the electrode 3, the third weight 23 is used to act on the top of the electrode 3. Specifically, the third weight 23 is arranged on the inner side of the support plate 11 facing away from the electrode 3, so that the electrode 3 can be attached to the support plate 11 in a longitudinally stretched state after being subjected to the force of the third weight 23.

[0041] Specifically, this solution involves setting a longitudinally extending support plate 11 and a force-applying object 2 arranged on one side of the support plate 11. This allows the electrode 3 to be longitudinally stretched and adhered to the support plate 11 after being subjected to the force of the force-applying object 2. With this solution, since the direction of gravity g of the wave region on the electrode 3 is parallel to the extension direction of the support plate 11, the wave crests of the wave region will not be pulled towards the support plate 11 due to their own weight. That is, the measurement results of the wave height and wave length dimensions of the wave region on the electrode 3 will not be affected by the self-weight of the wave region. In other words, this solution can significantly reduce the influence of the self-weight of the wave region on the wave size measurement. This solution more accurately represents the true data of the wave region on the electrode 3, providing more accurate factual basis for guiding the subsequent production of the electrode 3 and formulating production standards. This helps to reduce the impact of the wave electrode 3 production process on the yield of subsequent winding into battery cells, thereby improving the yield of wound battery cells and reducing the manufacturing cost of battery cells.

[0042] The following are some comparative data on the measurement of the crest height of the wave region of electrode 3.

[0043]

[0044] The structure of test fixture 1 will be described in more detail below.

[0045] Please refer to the following: Figures 2 to 4The test frame 1 also includes a frame body 12, a first rotating roller 13, and a second rotating roller 14. The support plate 11 and the frame body 12 are fixedly connected. The first rotating roller 13 and the second rotating roller 14 can be rotatably connected to the frame body 12 or to the support plate 11. That is, both the first rotating roller 13 and the second rotating roller 14 can rotate, and the axes of rotation of the first rotating roller 13 and the second rotating roller 14 point to the horizontal direction. The first rotating roller 13 is higher than the support plate 11, and the second rotating roller 14 is lower than the support plate 11. That is, the first rotating roller 13 is located above the second rotating roller 14. The first weight 21 is used to pull down the top of the electrode 3 and make the electrode 3 abut against the first rotating roller 13, so that the part of the electrode 3 that is attached to the support plate 11 can be subjected to an upward pulling force L1. The second weight 22 is used to pull down the bottom of the electrode 3 and make the electrode 3 abut against the second rotating roller 14, so that the part of the electrode that is attached to the support plate 11 can be subjected to a downward pulling force L2. In other words, by setting the first rotating roller 13 and the second rotating roller 14, the electrode 3 can be attached to the support plate 11 in a longitudinally stretched state, and the risk of the electrode 3 being scratched by the top and bottom edges of the support plate 11 can be reduced. Preferably, the top of the support plate 11 that contacts the electrode 3 is provided with a first rounded corner 111, and the bottom of the support plate 11 that contacts the electrode 3 is provided with a second rounded corner 112. By setting the first rounded corner 111 and the second rounded corner 112, the risk of the electrode 3 being scratched by the edges of the support plate 11 can be further reduced. In addition, the frame 12 is provided with a clearance space 15 below the first rotating roller 13. This clearance space 15 is used to avoid the first weight 21, so that the first weight 21 can naturally exert a force on the electrode 3 directly below the first rotating roller 13.

[0046] Please refer to them again. Figures 2 to 4 The frame 12 specifically includes a base plate 121, uprights 122, and two crossbars 123. The uprights 122 are fixed to the base plate 121, and the two crossbars 123 are fixedly connected to the uprights 122. The two crossbars 123 are also fixedly connected to the support plate 11, and the two crossbars 123 are located between the first rotating roller 13 and the second rotating roller 14. By setting the two crossbars 123, it is beneficial to form the aforementioned clearance space 15, and also to fix the support plate 11 at a higher position, thereby making it easier to leave enough space below the support plate 11 for the second heavy object 22 to use.

[0047] The above are merely preferred embodiments of this utility model, and only specifically describe the technical principles of this utility model. These descriptions are only for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model, as well as other specific embodiments of this utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this utility model.

Claims

1. A wave size measuring jig for a wavy object, characterized by, The test includes a test frame and a force-applying object; the force-applying object is connected to the test frame or is separately disposed from the test frame. The test frame includes a support plate extending longitudinally for supporting the wavy object. The force-applying object is used to act on the bottom or top of the wavy object, and the force-applying object is configured to be arranged on the side of the support plate opposite to the wavy object, so that the wavy object is attached to the support plate in a longitudinally stretched state.

2. The wave size measuring fixture for wavy objects as described in claim 1, characterized in that, The force-applying objects include a first weight and a second weight of equal weight. The first weight acts on the top of the wave-shaped object and applies an upward force to the portion of the wave-shaped object that is attached to the support plate. The second weight acts on the bottom of the wave-shaped object and applies a downward force to the portion of the wave-shaped object that is attached to the support plate. Both the first weight and the second weight are arranged on the side of the support plate opposite to the wave-shaped object, so that the wave-shaped object can be attached to the support plate in a longitudinally stretched state after being subjected to the forces of the first weight and the second weight.

3. The wave size measuring fixture for wavy objects as described in claim 2, characterized in that, The test frame also includes a frame body, a first rotating roller, and a second rotating roller; The support plate is fixedly connected to the frame. The first rotating roller and the second rotating roller are both rotatably connected to the frame or the support plate and their rotation axes both point to the horizontal direction. The first rotating roller and the second rotating roller are both located on the side of the support plate facing away from the wavy object. The first rotating roller is higher than the support plate and the second rotating roller is lower than the support plate. The first weight is used to pull the top of the wave-shaped object downwards to abut against the first rotating roller, so that the part of the wave-shaped object that is attached to the support plate can be subjected to an upward force. The second weight is used to pull the bottom of the wave-shaped object downwards to abut against the second rotating roller, so that the part of the wave-shaped object that is attached to the support plate can be subjected to a downward force.

4. The wave size measuring fixture for wavy objects as described in claim 3, characterized in that, The top of the support plate that contacts the wavy object is provided with a first rounded corner.

5. The wave size measuring fixture for wavy objects as described in claim 3, characterized in that, The bottom end of the support plate that contacts the wavy object is provided with a second rounded corner.

6. The wave size measuring fixture for wavy objects as described in claim 3, characterized in that, The frame is provided with a clearance space below the first rotating roller for avoiding the first heavy object.

7. The wave size measuring fixture for wavy objects as described in claim 6, characterized in that, The frame includes a base plate, uprights, and two horizontal bars; The upright is fixed to the base plate, and both horizontal bars are fixedly connected to the upright and to the support plate. Both horizontal bars are located between the first rotating roller and the second rotating roller, and the clearance space is formed between the two horizontal bars.

8. The wave size measuring fixture for wavy objects as described in claim 2, characterized in that, Both the first and second weights are weights.

9. The wave size measuring fixture for wavy objects as described in claim 1, characterized in that, The measuring fixture also includes a fixing block, which is used together with the support plate to clamp and fix one end of the wavy object; The force-applying object includes a third weight, which acts on the end of the wave-shaped object away from the fixed block, and is arranged on the side of the support plate opposite to the wave-shaped object, so that the wave-shaped object can be longitudinally stretched and adhered to the support plate after being subjected to the force of the third weight.

10. The wave size measuring fixture for wavy objects as described in claim 9, characterized in that, The third weight is a weight.

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