Tab detection tooling
By designing a tab detection fixture, the problems of large measurement errors and non-compliance with centering in lithium battery tab detection were solved, enabling rapid and accurate tab detection, reducing battery scrap, and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 宜春清陶能源科技有限公司
- Filing Date
- 2025-04-30
- Publication Date
- 2026-06-05
Smart Images
Figure CN224327655U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery production technology, and in particular to a tab detection tool. Background Technology
[0002] Due to their high voltage, high specific energy, and low self-discharge, lithium batteries are widely used in many fields. With the continuous development of lithium battery applications, improvements have been made to their structure, performance, and manufacturing processes, while the lifespan requirements for lithium batteries are also constantly increasing. The lifespan of a lithium battery is determined by the performance of the active materials within it. The current collector inside the battery is the channel for electron conduction, and it connects to the external electrodes of the battery by welding it to the tabs. Therefore, the dimensions of the tabs need to be inspected during the lithium battery production process. Currently, lithium battery tab inspection generally uses a steel ruler to measure the welded dimensions of the cell. However, due to differences in measurement methods, there is a certain measurement error during the measurement process, and it cannot accurately determine whether the centering and exposed dimensions of the tabs after welding are up to standard, thus failing to identify problems such as encapsulation imprinting and exposed tab adhesive.
[0003] Therefore, there is an urgent need for a tooling for detecting electrode tabs to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a tab inspection tool that can quickly detect whether the centering and exposed dimensions of the tabs are up to standard after welding, thereby improving production efficiency and reducing battery scrap.
[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:
[0006] A tab detection fixture is provided, comprising:
[0007] A first testing component is provided with a cell placement slot and a first tab testing slot. One end of the first tab testing slot is connected to the cell placement slot, and the other end of the first tab testing slot passes through the first testing component.
[0008] The second detection element has a second electrode detection groove provided on it, and one end of the second electrode detection groove passes through the second detection element.
[0009] The first detection element and the second detection element are arranged opposite to each other, and the central axes of the cell placement slot, the first electrode detection slot and the second electrode detection slot are collinear.
[0010] Optionally, the first and second detection elements are connected by the connecting assembly with an adjustable spacing in a first direction.
[0011] Optionally, the connecting component includes a fastener, the first detection element has a fixing hole, the second detection element has a mounting hole corresponding to the fixing hole, and the fastener passes through the mounting hole and is threaded into the fixing hole.
[0012] Optionally, the connecting assembly further includes an elastic element, which is sleeved on the outer periphery of the fastener and sandwiched between the first detection element and the second detection element, the elastic element being used to cause the first detection element and the second detection element to tend to move away from each other in the first direction.
[0013] Optionally, the fixing hole is disposed on the first end face of the first detection element, the first end face being located on the side of the first detection element facing the second detection element in the first direction, and multiple fixing holes are disposed at uniform intervals along the circumference of the first end face.
[0014] Optionally, in the second direction, the width of the tab is a, the maximum effective imprint width on one side of the tab adhesive is b, the width of the first tab detection groove and the width of the second tab detection groove are both c, a < c < a + 2b, and the second direction is perpendicular to the first direction.
[0015] Optionally, in the third direction, the depth of the cell placement slot is H1, the depth of the first tab detection slot is H2, and the depth of the second tab detection slot is H3, where H1 > H2 = H3, and the third direction is perpendicular to the first direction.
[0016] Optionally, the first detection element is further provided with a third tab detection groove, which is disposed opposite to the first tab detection groove at both ends of the cell placement groove along the first direction, and one end of the third tab detection groove is connected to the cell placement groove.
[0017] Optionally, the other end of the third electrode detection groove passes through the first detection element.
[0018] Optionally, two second detection elements are provided, which are arranged opposite each other in the first direction and are connected to the two ends of the first detection element by two sets of connecting components in adjustable positions.
[0019] The beneficial effects of this utility model are as follows:
[0020] The ear detection tooling proposed by the present utility model includes a first detection member and a second detection member. Among them, a battery cell placement groove and a first ear detection groove are provided on the first detection member. One end of the first ear detection groove is connected to the battery cell placement groove, and the other end of the first ear detection groove penetrates through the first detection member. A second ear detection groove is provided on the second detection member, and one end of the second ear detection groove penetrates through the second detection member. The first detection member and the second detection member are arranged opposite to each other, and the central axes of the battery cell placement groove, the first ear detection groove, and the second ear detection groove are collinear. When detecting the ear, the battery cell can be placed in the battery cell placement groove, and at the same time, it can be observed whether the ear connected to the battery cell can be located in the first ear detection groove and the second ear detection groove at the same time. If so, the ear is considered to pass the detection; if not, the ear is considered to fail the detection. This ear detection tooling can quickly detect whether there are problems with the centering degree and the exposed size of the ear, and further problems such as encapsulation stamping and ear glue exposure, improve production efficiency, and reduce battery scrapping. Description of the Drawings
[0021] Figure 1 is a schematic structural diagram of the ear detection tooling from the first perspective provided by an embodiment of the present utility model;
[0022] Figure 2 is a schematic structural diagram of the ear detection tooling from the second perspective provided by an embodiment of the present utility model.
[0023] In the figure:
[0024] 1. First detection member; 111. First ear detection groove; 112. Third ear detection groove;
[0025] 2. Second detection member; 211. Second ear detection groove;
[0026] 3. Connection component; 311. Fastener; 312. Elastic member;
[0027] 10. Battery cell; 20. Ear. Detailed Embodiment
[0028] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model. Additionally, it should be noted that for the sake of convenience of description, only parts related to the present utility model are shown in the drawings rather than all of them.
[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a tab detection fixture, including a first detection element 1 and a second detection element 2. The first detection element 1 has a cell placement slot and a first tab detection slot 111. One end of the first tab detection slot 111 is connected to the cell placement slot, and the other end of the first tab detection slot 111 passes through the first detection element 1. The second detection element 2 has a second tab detection slot 211, and one end of the second tab detection slot 211 passes through the second detection element 2. The first detection element 1 and the second detection element 2 are arranged opposite to each other, and the central axes of the cell placement slot, the first tab detection slot 111, and the second tab detection slot 211 are collinear.
[0034] In this embodiment, the first tab detection groove 111 and the cell placement groove are located at the center of the first detection element 1, and the second tab detection groove 211 is located at the center of the second detection element 2. Therefore, the central axes of the cell placement groove, the first tab detection groove 111, the second tab detection groove 211, the first detection element 1, and the second detection element 2 are collinear. In other embodiments, the first tab detection groove 111 and the cell placement groove may not necessarily be located at the center of the first detection element 1, and the second tab detection groove 211 may not necessarily be located at the center of the second detection element 2.
[0035] Optionally, the first detection element 1 and the second detection element 2 are connected by a connecting assembly 3 with an adjustable spacing in a first direction.
[0036] Specifically, since the central axes of the cell placement slot, the first tab detection slot 111, and the second tab detection slot 211 are collinear, if the cell 10 is placed in the cell placement slot but the tab 20 is not placed in the first tab detection slot 111, it is determined that the centering of the tab 20 does not meet the process requirements. If the cell 10 continues to be packaged, the tab 20 will be scrapped. At this time, the packaging process can be notified to temporarily move the centering position of the end cap to ensure that the offset cell 10 meets the packaging requirements, thus avoiding the scrapping of the tab 20 of the cell 10. In addition, the first tab detection slot 111 and the second tab detection slot 211 can detect the length of the tab 20 in the first direction. Only tabs 20 whose length is within the preset length range can ensure that the exposed size of the tab 20 after welding meets the requirements for the exposed tab adhesive after packaging. To address different lengths of tabs 20 or different requirements for exposed tab adhesive after encapsulation, the distance between the first detection element 1 and the second detection element 2 in the first direction can be adjusted using the connecting component 3. The sum of the length of the first tab detection groove 111 in the first direction, the distance between the first detection element 1 and the second detection element 2 in the first direction, and the length of the second tab detection groove 211 in the first direction constitutes the size setting for tab 20 detection. When the battery cell 10 is placed in the battery cell placement slot, if the tab 20 is only in the first tab detection groove 111 but is too short to be in the second tab detection groove 211, then the length of the tab 20 is considered unacceptable. Alternatively, if the tab 20 is too long and extends beyond the second tab detection groove 211 in the first direction, preventing it from being placed in the second tab detection groove 211, then the tab 20 is also considered unqualified. The first direction is... Figure 1 The ab direction in the middle.
[0037] Optionally, in the second direction, the width of both the first tab detection groove 111 and the second tab detection groove 211 is *c*, the width of the tab 20 is *a*, and the maximum effective imprint width of the adhesive shoulder seal on one side of the tab 20 is *b*, where *a* < *c* < *a* + 2*b*. If the tab 20 can be placed within the first tab detection groove 111 and the second tab detection groove 211, it can be ensured that the tab 20 will not be compressed after packaging. If the tab 20 cannot be placed within the first tab detection groove 111 and the second tab detection groove 211, it is considered that the centering of the tab 20 does not meet the process requirements, which will lead to the tab being scrapped during packaging. In specific implementation, if the width of the tab 20 is set to 40mm, and the maximum effective imprint width of the adhesive shoulder seal on one side of the tab 20 is 1.5mm, then the width of the first tab detection groove 111 and the second tab detection groove 211 can be set between 40mm and 43mm. The second direction is... Figure 1 In the CD direction, the second direction is perpendicular to the first direction. The width of the tab is 40, and the imprint width is 1.5. Therefore, the maximum width of the tab after packaging is 43.
[0038] Optionally, in the third direction, the depth of the cell placement slot is H1, the depth of the first tab detection slot 111 is H2, and the depth of the second tab detection slot 211 is H3, where H1 > H2 = H3. In specific implementation, the difference between the depth of the cell placement slot and the depth of the first tab detection slot 111 is the distance from the tab 20 to the large surface of the cell 10. When the cell 10 is placed in the cell placement slot, the large surface of the cell 10 abuts against the bottom of the slot, ensuring that the tab 20 can also abut against the bottom of the first tab detection slot 111 and the second tab detection slot 211, thus ensuring the tab detection fixture provides support and protection for the cell 10 and the tab 20 during the testing process. The third direction is... Figure 1 In the ef direction, the third direction is perpendicular to both the first and second directions.
[0039] In this embodiment, the connecting component 3 includes a fastener 311. A fixing hole is provided on the first detection element 1, and a mounting hole corresponding to the fixing hole is provided on the second detection element 2. The fastener 311 passes through the mounting hole and is threaded into the fixing hole, thereby connecting the first detection element 1 and the second detection element 2. The depth of the fastener 311 inserted into the fixing hole can be changed by rotating the fastener 311, providing a basis for changing the relative position of the first detection element 1 and the second detection element 2.
[0040] In this embodiment, the connecting component 3 further includes an elastic element 312. The elastic element 312 is sleeved on the outer periphery of the fastener 311 and sandwiched between the first detection element 1 and the second detection element 2. The elastic element 312 is used to make the first detection element 1 and the second detection element 2 tend to move away from each other in a first direction. That is, when the first detection element 1 and the second detection element 2 are connected to a preset relative position by the fastener 311, the distance between the first detection element 1 and the second detection element 2 in the first direction is less than the length of the elastic element 312 in the first direction. At this time, the elastic element 312 is in a compressed state, and rotating the fastener 311 can change the degree of compression of the elastic element 312. Specifically, if the fastener 311 is rotated counterclockwise to reduce the depth of the fastener 311 inserted into the fixing hole, the space for accommodating the elastic element 312 increases, the degree of compression of the elastic element 312 decreases, and the length of the elastic element 312 in the first direction increases, thereby increasing the distance between the first detection element 1 and the second detection element 2 in the first direction. If the fastener 311 is rotated clockwise to increase the depth of the fastener 311 inserted into the fixing hole, the space for accommodating the elastic member 312 will decrease, the degree of compression of the elastic member 312 will increase, and the length of the elastic member 312 in the first direction will decrease, so that the distance between the first detection member 1 and the second detection member 2 in the first direction will decrease.
[0041] Optionally, fixing holes are provided on the first end face of the first detection element 1, which is located on the side of the first detection element 1 facing the second detection element 2 in the first direction. Multiple fixing holes are provided, evenly spaced along the circumference of the first end face. In specific implementation, a connecting component 3 is provided at each fixing hole. By providing multiple fixing holes, not only can the connection strength between the first detection element 1 and the second detection element 2 be guaranteed, but also the adjustment accuracy of the relative positions of the first detection element 1 and the second detection element 2 can be guaranteed, ensuring that the spacing between the first detection element 1 and the second detection element 2 is consistent at all points in the first direction, thereby improving the detection accuracy of the tab 20.
[0042] In this embodiment, the first detection element 1 is further provided with a third tab detection groove 112. The third tab detection groove 112 and the first tab detection groove 111 are disposed opposite to each other at both ends of the cell placement groove along the first direction, and one end of the third tab detection groove 112 is connected to the cell placement groove. The third tab detection groove 112 and the first tab detection groove 111 together provide accommodating space for the tabs 20 at both ends of the cell 10. When one tab 20 is detected, it can provide support for the other tab 20, preventing it from being overturned by external force. In specific testing, the large surface of the cell 10 in the third direction is first placed against the bottom of the cell placement groove to detect one tab 20 of the cell 10. Then, the cell 10 can be flipped over so that the other large surface of the cell 10 in the third direction is placed against the bottom of the cell placement groove to detect the other tab 20 of the cell 10.
[0043] In other embodiments, the third tab detection groove 112 may not be provided on the first detection element 1. Instead, to avoid the position of the end tab 20, the length of the cell placement groove in the first direction may be not less than the length of the cell 10 and the length of the end tab 20. Alternatively, the cell placement groove may have a tab 20 opening at one end away from the first tab detection groove 111, that is, the first detection element 1 is penetrated through the tab 20 opening.
[0044] Furthermore, in this embodiment, the other end of the third tab detection groove 112 passes through the first detection element 1. Having the other end of the third tab detection groove 112 pass through the first detection element 1, compared to having the length of the third tab detection groove 112 in the first direction not less than the length of the tab 20, not only reduces the length of the first detection element 1 in the first direction (i.e., reduces the volume and mass of the first detection element 1), but also provides a basis for simultaneously setting the second detection element 2 at both ends of the first detection element 1, so that the tabs 20 at both ends of the battery cell 10 can be detected simultaneously.
[0045] Optionally, two second detection elements 2 are provided, which are arranged opposite each other in the first direction, and are respectively connected to the two ends of the first detection element 1 by two sets of connecting components 3 in an adjustable position. In specific testing, the first detection element 1 and the two second detection elements 2 can be assembled and adjusted first, and then the battery cell 10 can be placed in the battery cell placement slot, so that the two tabs 20 at both ends can be tested simultaneously.
[0046] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A tab detection fixture, characterized in that, include: The first detection component (1) is provided with a cell placement slot and a first tab detection slot (111). One end of the first tab detection slot (111) is connected to the cell placement slot, and the other end passes through the first detection component (1). The second detection element (2) is provided with a second electrode detection groove (211), one end of which passes through the second detection element (2); The first detection element (1) and the second detection element (2) are arranged opposite to each other, and the central axes of the cell placement groove, the first electrode detection groove (111) and the second electrode detection groove (211) are collinear.
2. The electrode detection fixture according to claim 1, characterized in that, The first detection element (1) and the second detection element (2) are connected by a connecting component (3) with an adjustable spacing in a first direction.
3. The electrode detection fixture according to claim 2, characterized in that, The connecting component (3) includes a fastener (311), a fixing hole is provided on the first detection element (1), and an mounting hole corresponding to the fixing hole is provided on the second detection element (2). The fastener (311) passes through the mounting hole and is threaded into the fixing hole.
4. The electrode detection fixture according to claim 3, characterized in that, The connecting component (3) further includes an elastic element (312), which is sleeved on the outer periphery of the fastener (311) and sandwiched between the first detection element (1) and the second detection element (2). The elastic element (312) is used to make the first detection element (1) and the second detection element (2) tend to move away from each other in the first direction.
5. The electrode detection fixture according to claim 3, characterized in that, The fixing hole is disposed on the first end face of the first detection element (1), the first end face is located on the side of the first detection element (1) facing the second detection element (2) in the first direction, and multiple fixing holes are disposed at uniform intervals along the circumference of the first end face.
6. The electrode detection fixture according to claim 2, characterized in that, In the second direction, the width of the tab (20) is a, the maximum effective imprint width on the tab adhesive side is b, the width of the first tab detection groove (111) and the second tab detection groove (211) are both c, a < c < a + 2b, and the second direction is perpendicular to the first direction.
7. The electrode tab detection fixture according to claim 2, characterized in that, In the third direction, the depth of the cell placement slot is H1, the depth of the first tab detection slot (111) is H2, and the depth of the second tab detection slot (211) is H3, where H1 > H2 = H3, and the third direction is perpendicular to the first direction.
8. The electrode detection fixture according to claim 2, characterized in that, The first detection component (1) is further provided with a third tab detection groove (112), which is disposed opposite to the first tab detection groove (111) at both ends of the cell placement groove along the first direction, and one end of the third tab detection groove (112) is connected to the cell placement groove.
9. The electrode detection fixture according to claim 8, characterized in that, The other end of the third electrode detection groove (112) passes through the first detection element (1).
10. The electrode detection fixture according to claim 9, characterized in that, Two second detection elements (2) are provided, and the two second detection elements (2) are arranged opposite to each other in the first direction, and are respectively connected to the two ends of the first detection element (1) by two sets of connecting components (3).