Measuring device for elongation percentage of pole piece

Abstract

The utility model relates to the technical field of battery pole piece production, and discloses a pole piece elongation measuring device which comprises a measuring platform, a first pressing mechanism and a second pressing mechanism. The measuring platform is provided with a groove which is a straight groove. The first pressing mechanism is arranged on one side of the groove and can press the coating area of the pole piece to be measured on the measuring platform; the second pressing mechanism is arranged on the other side of the groove and can press the tab area of the pole piece to be measured on the measuring platform; a clearance area is formed between the first pressing mechanism and the second pressing mechanism and corresponds to the groove, so that the coating area and the tab area of the to-be-detected pole piece can be cut along the groove through the cutting mechanism. The device for measuring the extension rate of the pole piece solves the problems that the measurement of the extension rate of the pole piece fails due to the breakage of the pole piece, the extension rate of the pole piece needs to be measured again, the scrappage of the pole piece is increased, and the measurement efficiency of the extension rate of the pole piece is low.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece production, in particular to a device for measuring the elongation of a pole piece. Background Art

[0002] Currently, battery pole sheets undergo a certain degree of elongation during the rolling process. The pole sheet is divided into the tab area and the coating area. During the rolling process, only when the elongation of the tab area equals that of the coating area can the pole sheet be flattened and wrinkles eliminated. Otherwise, the pole sheet is prone to breakage. Therefore, a precise pole sheet elongation measurement device is required to assist in the rolling process and adjust the rolling pressure to minimize pole sheet wrinkling, deformation, and even breakage.

[0003] In the prior art, the measurement of pole piece elongation usually involves first drawing two straight lines perpendicular to the length of the pole piece sample along the length direction of the pole piece sample before rolling and measuring the distance between the two straight lines, which is marked as L1; after rolling the pole piece sample, the pole piece sample is cut to separate the tab area and the coating area, allowing the tab to remain in a fully stretched state, and measuring the distance between the two previously drawn straight lines, which is marked as L2; ​​the tab elongation is (L2-L1) / L1. However, in the actual production process, it was found that the tab is prone to breakage during the step of separating the tab area from the coating area after rolling, which leads to failure in the measurement of the tab elongation; this not only increases the amount of pole piece scrapped and reduces the efficiency of the tab elongation measurement, but also increases the production debugging cost, seriously affecting production capacity.

[0004] Therefore, in order to solve the above technical problems, it is urgent to develop a device for measuring the elongation of pole pieces. Utility Model Content

[0005] In order to address the deficiencies of the prior art, the utility model provides a device for measuring the elongation of a pole piece, which solves the problem that the measurement of the elongation of the pole piece fails due to the breakage of the pole piece, and the pole piece elongation needs to be remeasured, which in turn leads to an increase in the amount of pole piece scrap, low efficiency of the pole piece elongation measurement, high debugging cost and impact on production capacity.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical solutions:

[0007] The utility model provides a device for measuring the elongation of a pole piece, comprising:

[0008] The measuring platform is provided with a groove, wherein the groove is a straight groove;

[0009] A first pressing mechanism, provided on one side of the groove, capable of pressing the coating area of ​​the electrode to be measured onto the measuring platform; and

[0010] The second pressing mechanism is arranged on the other side of the groove, and can press the tab area of ​​the electrode to be tested onto the measuring platform; an escape area is formed between the first pressing mechanism and the second pressing mechanism, and the escape area corresponds to the groove, so that the coating area and the tab area of ​​the electrode to be tested can be divided along the groove by the cutting mechanism.

[0011] In some implementations, the first pressing mechanism includes a first soft portion, which can be in soft contact with the coating area of ​​the electrode to be measured and press the coating area of ​​the electrode to be measured onto the measuring platform; and / or

[0012] The second pressing mechanism includes a second soft portion, which can be in soft contact with the tab area of ​​the pole piece to be measured and press the tab area of ​​the pole piece to be measured onto the measuring platform.

[0013] In this implementation, the first soft portion and / or the second soft portion are in soft contact with the coating area and / or the tab area of ​​the electrode to be tested, respectively, thereby avoiding the problem that the first clamping mechanism and / or the second clamping mechanism are in hard contact with the electrode to be tested, which may cause the tab to break when the tab area and the coating area are separated when the electrode to be tested is cut, thereby affecting the measurement of the tab elongation.

[0014] In some implementations, the length of the first soft portion is greater than the length of the coating area of ​​the electrode to be tested; and / or

[0015] The length of the second soft portion is greater than the length of the tab region of the electrode to be tested.

[0016] In some implementations, the first soft part and / or the second soft part is a wooden strip.

[0017] In some implementations, the first pressing mechanism further includes a first fixing portion, the first fixing portion being connected to the first soft portion, and the first fixing portion being capable of fixing the first soft portion on the measuring platform; and / or

[0018] The second pressing mechanism further includes a second fixing portion connected to the second soft portion, and the second fixing portion can fix the second soft portion on the measuring platform.

[0019] In some implementations, the first fixing portion and / or the second fixing portion can be adsorbed on the measurement platform.

[0020] In this implementation, the electrode to be measured is more fixed on the measuring platform and stretched, thereby avoiding the problem that the electrode to be measured is displaced and / or curled during the process of cutting the electrode to be measured to separate the tab area and the coating area, thereby causing the tab to break, thereby affecting the measurement of the tab elongation rate; it also avoids the problem that the electrode to be measured is displaced and / or curled during the process of measuring the tab elongation, thereby affecting the accuracy of the measurement data.

[0021] In some implementations, the measurement platform includes a ferromagnetic material layer, and the first fixing portion and / or the second fixing portion is a magnet.

[0022] In some implementations, there are two first fixing portions, and the two first fixing portions are respectively connected to two opposite ends of the first soft portion; and / or

[0023] There are two second fixing parts, and the two second fixing parts are respectively connected to two opposite ends of the second soft part.

[0024] In some implementations, a scale is provided on at least one side of the groove on the measuring platform.

[0025] In this implementation, the length value of the corresponding area of ​​the electrode to be tested can be obtained according to the scale on one side of the groove, thereby calculating the elongation of the corresponding area of ​​the electrode to be tested.

[0026] In some implementations, the pole piece elongation measuring device further includes a cutting mechanism, which can cut into the groove and move along the groove.

[0027] In summary, the present invention has at least the following advantages:

[0028] The device for measuring the elongation of a pole piece provided by the utility model adopts a first pressing mechanism and a second pressing mechanism to respectively press the coating area and the tab area of ​​the pole piece to be measured on the measuring platform, and then uses a cutting mechanism to cut the coating area and the tab area of ​​the pole piece to be measured along the groove through the air avoidance area, so as to ensure that the tab area is fully stretched before measurement, and can avoid the tab from being broken when the coating area and the tab area are separated in the process of measuring the elongation of the tab, thereby ensuring the measurement efficiency of the tab elongation, reducing the production debugging cost, and solving the problem that the measurement of the tab elongation fails due to the breakage of the tab, and the tab elongation needs to be re-measured, which leads to an increase in the number of scrapped pole pieces, low efficiency in measuring the tab elongation, high debugging cost and impact on production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the device for measuring the elongation of the pole piece in Example 1;

[0030] Figure 2 Schematic diagram of the structure of a device for measuring the elongation of a pole piece in some other embodiments;

[0031] Figure 3 Schematic diagram of the structure of the device for measuring the elongation of the pole piece in Example 2;

[0032] Figure 4 Schematic diagram of the structure of the device for measuring the elongation of the pole piece in Example 3.

[0033] Markings in the figure:

[0034] 1. Measuring platform; 11. Groove; 12. Scale;

[0035] 2. First pressing mechanism; 2a. Air-avoidance area; 21. First soft portion; 22. First fixing portion;

[0036] 3. Second pressing mechanism; 31. Second soft portion; 32. Second fixing portion;

[0037] 4. Cutting mechanism;

[0038] 5. Clamping device; 51. Avoid empty space. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] Please see the attached Figure 1 ~Attached Figure 2 The device for measuring the elongation of a pole piece of the present invention includes a measuring platform 1, a first pressing mechanism 2 and a second pressing mechanism 3.

[0043] Among them, see Figure 1 , Figure 1The diagram illustrates the structural relationship between the measuring platform 1, the first clamping mechanism 2, and the second clamping mechanism 3 in an embodiment of the present invention. Specifically, the measuring platform 1 is provided with a straight groove 11; the first clamping mechanism 2 is disposed on one side of the groove 11 and can press the coating area of ​​the electrode to be measured against the measuring platform 1; the second clamping mechanism 3 is disposed on the other side of the groove 11 and can press the tab area of ​​the electrode to be measured against the measuring platform 1; an air gap 2a is formed between the first and second clamping mechanisms 2 and 3, and the air gap 2a corresponds to the groove 11, so that the coating area and the tab area of ​​the electrode to be measured can be separated along the groove 11 by the cutting mechanism 4.

[0044] In this embodiment, when measuring the elongation of the pole piece, two straight lines perpendicular to the length direction of the pole piece are drawn along the length direction of the pole piece before rolling, the distance between the two straight lines is measured and marked as L1, and then the pole piece is rolled. The measuring device of the pole piece elongation of the embodiment of the utility model is used to measure the distance between the two straight lines in the pole piece ear area of ​​the pole piece to be measured after rolling. The specific measurement method is: the pole piece with the above two straight lines drawn before rolling is cut from the pole piece that has been rolled as the pole piece to be measured, and the first clamping mechanism 2 and the second clamping mechanism 3 are respectively used to press the coating area and the pole piece ear area of ​​the pole piece to be measured on the measuring platform 1, and the junction between the coating area and the pole piece ear area of ​​the pole piece to be measured is located above the groove 11. In this way, the cutting mechanism 4 can be used to separate the coating area and the pole piece ear area of ​​the pole piece along the groove 11 through the air avoidance area 2a, thereby obtaining a complete pole piece ear area. Then, the second pressing mechanism 3 is adjusted to press only one end of the tab area, and the tab area is gently stroked to reach a fully stretched state, and then the tab area is pressed again on the measuring platform 1 using the second pressing mechanism 3, thereby measuring the distance between the two straight lines after rolling and marking the distance as L2, and the elongation of the tab is calculated to be (L2-L1) / L1.

[0045] It can be understood that measuring the elongation of the pole piece includes measuring the elongation of the tab (i.e., measuring the elongation of the tab area) and measuring the elongation of the coating area. The method of measuring the elongation of the coating area is similar to the method of measuring the elongation of the tab, and will not be repeated here.

[0046] Furthermore, after the cutting mechanism 4 separates the coating area and the tab area of ​​the electrode to be measured along the groove 11, the first clamping mechanism 2 and the coating area can be removed from the measurement platform 1, providing a larger measurement space for measuring the tab elongation. Conversely, when the elongation of the coating area needs to be measured, the second clamping mechanism 3 and the tab area can be removed from the measurement platform 1, thereby providing a larger measurement space for measuring the elongation of the coating area, without interference between the two.

[0047] Preferably, in order to ensure the reliability of the measurement of the electrode elongation, a 1.5-meter electrode is generally cut as the electrode to be measured. According to the length of the electrode to be measured, the length of the measuring platform 1 can be set to 2 meters. In this way, the length of the groove 11, the first clamping mechanism 2 and / or the second clamping mechanism 3 can be consistent with the length of the measuring platform, so that the electrode to be measured can be fully stretched on the measuring platform 1, thereby avoiding the displacement and / or curling of the electrode to be measured in the process of cutting the electrode to be measured to separate the tab area and the coating area, thereby causing the tab to break, thereby affecting the measurement of the tab elongation; it also avoids the displacement and / or curling of the electrode to be measured in the process of measuring the pole piece elongation, thereby ensuring the reliability of the measurement data of the pole piece elongation. The measuring platform can be a table or other object with a flat horizontal surface and a smooth surface.

[0048] The above-mentioned device for measuring the elongation of the pole piece adopts the first clamping mechanism 2 and the second clamping mechanism 3 to respectively press the coating area and the tab area of ​​the pole piece to be measured on the measuring platform 1, and then uses the cutting mechanism 4 to cut the coating area and the tab area of ​​the pole piece to be measured along the groove 11 through the air avoidance area 2a, so as to ensure that the tab area is fully stretched before measurement. This can avoid the tab from breaking when the coating area and the tab area are separated during the measurement of the tab elongation, thereby ensuring the measurement efficiency of the tab elongation, reducing the production debugging cost, and solving the problem that the tab elongation measurement fails due to the tab breakage, and the tab elongation needs to be re-measured, which leads to an increase in the number of scrapped pole pieces, low tab elongation measurement efficiency, high debugging cost and impact on production capacity.

[0049] See Figure 2 In some other embodiments, the first clamping mechanism and the second clamping mechanism jointly form a clamping device 5 with a clearance position 51 in the middle, and the clearance position 51 is arranged corresponding to the groove 11 opened on the measuring platform 1, that is, the clearance position 51 constitutes a clearance area between the first clamping mechanism and the second clamping mechanism, so that the coating area and the tab area of ​​the electrode to be measured can be separated along the groove 11 by the clearance position 51.

[0050] Example 2:

[0051] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the measuring device for the pole piece elongation rate of the utility model. Figure 3 .

[0052] Among them, see Figure 3 , Figure 3The diagram illustrates the structural relationship between the first pressing mechanism 2 and the first soft portion 21 and / or the structural relationship between the second pressing mechanism 3 and the second soft portion 31 in an embodiment of the present invention. Specifically, the first pressing mechanism 2 includes the first soft portion 21, which can softly contact the coating area of ​​the electrode to be measured and press the coating area of ​​the electrode to be measured onto the measuring platform 1; and / or the second pressing mechanism 3 includes the second soft portion 31, which can softly contact the tab area of ​​the electrode to be measured and press the tab area of ​​the electrode to be measured onto the measuring platform 1.

[0053] In this embodiment, the first soft portion 21 and / or the second soft portion 31 are in soft contact with the coating area and / or the tab area of ​​the electrode to be tested, respectively, thereby avoiding the problem that the first clamping mechanism 2 and / or the second clamping mechanism 3 are in hard contact with the electrode to be tested, which may cause the tab to break when the tab area and the coating area are separated when the electrode to be tested is cut, thereby affecting the measurement of the tab elongation.

[0054] In some preferred embodiments, the length of the first soft portion 21 is greater than the length of the coating area of ​​the electrode to be measured; and / or the length of the second soft portion 31 is greater than the length of the tab area of ​​the electrode to be measured, so that the first soft portion 21 and / or the second soft portion 31 can respectively fully press the coating area and / or the tab area of ​​the electrode to be measured onto the measuring platform 1, thereby ensuring the reliability of the measurement of the electrode elongation and further improving the accuracy of the measurement data of the electrode elongation. Of course, the length of the first soft portion 21 and / or the second soft portion 31 can also be the same as the length of the coating area and / or the tab area of ​​the electrode to be measured, as long as the first soft portion 21 and / or the second soft portion 31 can respectively fully press the coating area and / or the tab area of ​​the electrode to be measured onto the measuring platform 1.

[0055] In some preferred embodiments, the first soft portion 21 and / or the second soft portion 31 are wooden strips. Since the first soft portion 21 and / or the second soft portion 31 are made of wood, the electrode to be measured is not damaged during the process of measuring the electrode elongation, thereby avoiding the problem of fracture in the tab area of ​​the electrode to be measured, which would lead to increased electrode scrap and increased production and commissioning costs. It is understood that the first soft portion 21 and / or the second soft portion 31 are not limited to wooden strips and can also be a press made of a material such as plastic that does not damage the electrode to be measured.

[0056] In some preferred embodiments, please continue to see Figure 3 , Figure 3The diagram illustrates the structural relationship between the first fixing portion 22 and the first soft portion 21 and / or the structural relationship between the second fixing portion 32 and the second soft portion 31 in an embodiment of the present invention. Specifically, the first clamping mechanism 2 further includes a first fixing portion 22, which is connected to the first soft portion 21 and can fix the first soft portion 21 on the measuring platform 1; and / or the second clamping mechanism 3 further includes a second fixing portion 32, which is connected to the second soft portion 31 and can fix the second soft portion 31 on the measuring platform 1.

[0057] In this embodiment, the first fixing portion 22 fixes the first soft portion 21 on the measuring platform 1, thereby pressing and fixing the coating area of ​​the electrode to be measured on the measuring platform 1; the second fixing portion 32 fixes the second soft portion 31 on the measuring platform 1, thereby pressing and fixing the ear area of ​​the electrode to be measured on the measuring platform 1, ensuring that the electrode to be measured is fully stretched and pressed and fixed on the measuring platform, thereby avoiding the problem that the electrode to be measured is displaced and / or curled in the process of cutting the electrode to be measured to separate the ear area and the coating area, thereby causing the ear to break, thereby affecting the measurement of the ear elongation; it also avoids the displacement and / or curling of the electrode to be measured in the process of measuring the elongation of the electrode, thereby ensuring the reliability of the measurement data of the electrode elongation.

[0058] In some preferred embodiments, the first fixing portion 22 and / or the second fixing portion 32 can be adsorbed on the measuring platform 1. This allows the electrode to be more firmly fixed on the measuring platform and stretched, thereby avoiding the problem of displacement and / or curling of the electrode to be measured during the process of cutting the electrode to be measured to separate the tab area and the coating area, thereby causing the tab to break and affecting the measurement of the tab elongation; and also avoids the problem of displacement and / or curling of the electrode to be measured during the process of measuring the pole piece elongation, thereby affecting the accuracy of the measurement data.

[0059] In some preferred embodiments, the measurement platform 1 includes a ferromagnetic material layer, and the first fixing portion 22 and / or the second fixing portion 32 are magnets. The measurement platform 1 generates a magnetic attraction reaction with the first fixing portion 22 and / or the second fixing portion 32, thereby securing the first soft portion 21 and / or the second soft portion 31 to the measurement platform 1, and further pressing the pole piece to be measured against the measurement platform 1 to facilitate measurement of the pole piece's elongation. It will be appreciated that the ferromagnetic material layer can be distributed on the surface of the measurement platform 1, within the measurement platform 1, or the entire measurement platform 1 can be ferromagnetic material, as long as it generates a magnetic attraction reaction with the first fixing portion 22 and / or the second fixing portion 32.

[0060] In some more preferred embodiments, there are two first fixing portions 22, which are respectively connected to two opposite ends of the first soft portion 21; and / or there are two second fixing portions 32, which are respectively connected to two opposite ends of the second soft portion 31. When measuring the elongation of a pole piece, the first fixing portion 22 and / or the second fixing portion 32 do not come into contact with the pole piece to be measured. Under the premise of ensuring that the pole piece is pressed tightly against the measuring platform 1, the first fixing portion 22 and / or the second fixing portion 32 are prevented from interfering with and / or damaging the pole piece to be measured, thereby affecting the reliability of the pole piece elongation measurement data.

[0061] Example 3:

[0062] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the measuring device for the pole piece elongation rate of the utility model. Figure 4 .

[0063] Among them, see Figure 4 , Figure 4 The diagram shows the structural relationship between the groove 11 and the scale 12 in the embodiment of the present invention. Specifically, the scale 12 is provided on at least one side of the groove 11 on the measuring platform 1.

[0064] In this embodiment, after the coating area and the tab area of ​​the electrode to be tested are separated by the cutting mechanism 4, the tab area is in a stretched state. At this time, the length value of the corresponding area of ​​the electrode to be tested can be obtained according to the scale 12 on one side of the groove 11, thereby calculating the elongation of the corresponding area of ​​the electrode to be tested. In order to improve the measurement efficiency and reliability of the elongation of the electrode, in this embodiment, scales 12 are provided on both sides of the groove 11; in order to ensure the accuracy of the measurement data of the elongation of the electrode, in this embodiment, the accuracy of the scale 12 value is 0.1 mm. It should be understood that the accuracy of the scale 12 value can be adjusted according to the actual measurement scenario.

[0065] In some preferred embodiments, the electrode elongation measurement device further includes a cutting mechanism 4, which can cut into the groove 11 and move along the groove 11. The cutting mechanism 4 can cut into the groove 11 to separate the coating area and the tab area of ​​the electrode to be measured, thereby ensuring the flatness of the cut of the electrode to be measured, thereby facilitating the measurement of the elongation of the electrode to be measured and improving the accuracy of the measurement data of the electrode elongation. Preferably, the cutting mechanism 4 can be a cutting blade.

[0066] Furthermore, a driving structure can be provided to drive the cutting mechanism 4 to cut the electrode to be tested so that the coating area and the tab area of ​​the electrode to be tested are separated. The cutting mechanism 4 can also be manually operated to separate the coating area and the tab area of ​​the electrode to be tested, which is not limited here.

[0067] In some more preferred embodiments, the depth of the groove 11 is not less than 1 cm. This ensures that the cutting mechanism 4 can smoothly separate the coating area and the tab area of ​​the electrode to be measured, and avoids the cutting mechanism 4 causing damage to the measuring platform 1 or bending or damage to the cutting mechanism 4 itself. It also protects both the cutting mechanism 4 and the measuring platform 1, thereby increasing the service life of the cutting mechanism 4 and the measuring platform 1.

[0068] The device for measuring the elongation of a pole piece of the present invention adopts a first pressing mechanism 2 and a second pressing mechanism 3 to respectively press the coating area and the tab area of ​​the pole piece to be measured on the measuring platform 1, and then uses a cutting mechanism 4 to cut the coating area and the tab area of ​​the pole piece to be measured along the groove 11 through the air avoidance area 2a, so as to ensure that the tab area is fully stretched before measurement, and can avoid the tab from being broken when the coating area and the tab area are separated in the process of measuring the elongation of the tab, thereby ensuring the measurement efficiency of the tab elongation, reducing the production debugging cost, and solving the problem that the measurement of the tab elongation fails due to the breakage of the tab, and the tab elongation needs to be re-measured, which leads to an increase in the number of scrapped pole pieces, low efficiency in measuring the tab elongation, high debugging cost and impact on production capacity.

[0069] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0070] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0071] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0072] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A device for measuring the elongation of a pole piece, characterized in that: include: The measuring platform (1) is provided with a groove (11), wherein the groove (11) is a straight groove; A first pressing mechanism (2) is provided on one side of the groove (11) and can press the coating area of ​​the electrode to be measured onto the measuring platform (1); and A second pressing mechanism (3) is provided on the other side of the groove (11) and can press the tab area of ​​the electrode piece to be tested onto the measuring platform (1); an escape area (2a) is formed between the first pressing mechanism (2) and the second pressing mechanism (3), and the escape area (2a) corresponds to the groove (11), so that the coating area and the tab area of ​​the electrode piece to be tested can be divided along the groove (11) by a cutting mechanism.

2. The device for measuring the pole piece elongation according to claim 1, characterized in that: The first pressing mechanism (2) comprises a first soft portion (21), the first soft portion (21) being capable of softly contacting the coating area of ​​the electrode to be measured and pressing the coating area of ​​the electrode to be measured onto the measuring platform (1); and / or The second pressing mechanism (3) comprises a second soft portion (31), and the second soft portion (31) can be in soft contact with the tab area of ​​the pole piece to be measured and press the tab area of ​​the pole piece to be measured onto the measuring platform (1).

3. The device for measuring the pole piece elongation according to claim 2, characterized in that: The length of the first soft portion (21) is greater than the length of the coating area of ​​the electrode to be tested; and / or The length of the second soft portion (31) is greater than the length of the tab region of the electrode to be tested.

4. The device for measuring the pole piece elongation according to claim 2, characterized in that: The first soft part (21) and / or the second soft part (31) is a wooden strip.

5. The device for measuring the pole piece elongation according to claim 2, characterized in that: The first pressing mechanism (2) further comprises a first fixing portion (22), the first fixing portion (22) being connected to the first soft portion (21), and the first fixing portion (22) being capable of fixing the first soft portion (21) on the measuring platform (1); and / or The second pressing mechanism (3) further includes a second fixing portion (32), the second fixing portion (32) being connected to the second soft portion (31), and the second fixing portion (32) being capable of fixing the second soft portion (31) on the measuring platform (1).

6. The device for measuring the pole piece elongation according to claim 5, characterized in that: The first fixing portion (22) and / or the second fixing portion (32) can be adsorbed on the measuring platform (1).

7. The device for measuring the pole piece elongation according to claim 6, characterized in that: The measuring platform (1) comprises a ferromagnetic material layer, and the first fixing part (22) and / or the second fixing part (32) are magnets.

8. The device for measuring the pole piece elongation according to claim 5, characterized in that: The number of the first fixing parts (22) is two, and the two first fixing parts (22) are respectively connected to two opposite ends of the first soft part (21); and / or The number of the second fixing parts (32) is two, and the two second fixing parts (32) are respectively connected to two opposite ends of the second soft part (31).

9. The device for measuring the pole piece elongation according to any one of claims 1 to 8, characterized in that: The measuring platform (1) is provided with a scale (12) on at least one side of the groove (11).

10. The device for measuring the pole piece elongation according to any one of claims 1 to 8, characterized in that: The pole piece elongation measurement device further comprises a cutting mechanism (4), wherein the cutting mechanism (4) can cut into the groove (11) and move along the groove (11).

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