Positioning piece

Abstract

The utility model provides a positioning piece which comprises a body provided with a positioning hole, the positioning hole penetrates through the body in the height direction of the body and is used for positioning the welding position of a tab of a first electrode assembly, and the welding position of the tab of the first electrode assembly is used for adjusting the to-be-welded position of a tab of a second electrode assembly. And the positioning hole is also used for a welding device to pass through so as to weld the tab of the second electrode assembly. By means of the technical scheme, the technical problem that welding printing positions of different roll cores are different can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding frock technical field, concretely relates to a positioning piece. BACKGROUND

[0002] The current double winding core of lithium battery needs to keep the welding position at the same level after welding, but each welding machine is relatively independently arranged, thereby cannot effectively guarantee that the welding position is at the same level and relative position, which will lead to the double winding core in the core influence product yield. SUMMARY

[0003] The embodiment of the utility model provides a positioning piece can improve the technical problem that the welding position of different winding core has difference.

[0004] The embodiment of the utility model provides a positioning piece, positioning piece includes: the body has the positioning hole, the positioning hole is along the height direction of the body and passes through the body, the positioning hole is used for positioning the welding position of the tab of first electrode assembly, the welding position of the tab of first electrode assembly is used for adjusting the welding position of the tab of second electrode assembly, the positioning hole is also used for the welding device passes through to weld the tab of second electrode assembly.

[0005] In an embodiment, the body has a plurality of positioning holes, and the plurality of positioning holes are arranged on the body in an interval.

[0006] In an embodiment, the body is provided with a first region and a second region along the length direction of the body, the positioning hole in the first region is used for positioning the welding position of the positive tab of the first electrode assembly and is used for the welding device to pass through to weld the positive tab of the second electrode assembly, and the positioning hole in the second region is used for positioning the welding position of the negative tab of the first electrode assembly and is used for the welding device to pass through to weld the negative tab of the second electrode assembly.

[0007] In an embodiment, the extension length of the positioning hole along the length direction of the body is L1, and 14mm≤L1≤18mm.

[0008] In an embodiment, the extension length of the positioning hole along the width direction of the body is L2, and 4mm≤L2≤8mm.

[0009] In an embodiment, the positioning piece further includes a limiting hole, the limiting hole is symmetrically arranged along the length direction of the body, and the limiting hole is used for limiting the position of the positioning piece.

[0010] In an embodiment, the inner diameter of the limiting hole is φ, and 6mm≤φ≤10mm.

[0011] In an embodiment, the edge of the body is further provided with a transition structure.

[0012] In an embodiment, the transition structure comprises a fillet, and a radius of the fillet is R, 0.5mm≤R≤2mm.

[0013] In an embodiment, a marking line structure is arranged at the edge of the positioning hole in the circumferential direction, and the marking line structure is used for marking a welding position of the tab of the first electrode assembly.

[0014] According to the technical scheme of the utility model, the positioning hole is arranged on the body, the body is placed on a welding table during welding of the tab, the position of the positioning hole is compared with the welded mark position, if there is deviation between the welded mark position and the position of the positioning hole of the body, the position of the welding machine is adjusted, the next welding position is coincided with the existing mark calibration position, the consistency of the welding marks of the plurality of battery cells is ensured, and the yield of products is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Fig. 1 It is the top view schematic diagram of the positioning piece provided by the embodiment of the utility model;

[0017] Fig. 2 It is the side surface schematic diagram of the positioning piece provided by the embodiment of the utility model;

[0018] Fig. 3 It is the three-dimensional schematic diagram of another view of the positioning piece provided by the embodiment of the utility model;

[0019] Fig. 4 It is the top view schematic diagram of another view of the positioning piece provided by the embodiment of the utility model.

[0020] Among them, the above-mentioned drawing includes the following figure marks:

[0021] Body 10, positioning hole 11, first area A, second area B, limiting hole 12, transition structure 13, marking line structure 14, body length direction X, body width direction Y, body height direction Z. DETAILED DESCRIPTION

[0022] The technical solutions of the utility model will be clearly and completely described in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] As shown in Figs. 1 to 4 the first aspect, the embodiments of the utility model provide a positioning piece, the positioning piece includes: a body 10, having a positioning hole 11, the positioning hole 11 is through the body 10 along the height direction of the body 10, the positioning hole 11 is used for positioning the welding position of the tab of the first electrode assembly, the welding position of the tab of the first electrode assembly is used for adjusting the to-be-welded position of the tab of the second electrode assembly, and the positioning hole is also used for the welding device to pass through to weld the tab of the second electrode assembly.

[0024] The technical solutions of the utility model are used, the positioning hole 11 is arranged on the body 10, in the welding process of the tab, the body 10 is placed on the welding table, then the position of the positioning hole 11 is compared with the welded mark position, if the welded mark position and the position of the positioning hole 11 of the body 10 exist deviation, then the position of the welding machine is adjusted, so that the next welding position coincides with the existing mark calibration position, thereby the consistency of the multiple battery welding marks can be guaranteed, and the yield of the product is beneficial to guaranteeing.

[0025] In the application, the material of the body 10 is selected as acrylic, acrylic is also called special treated organic glass, has multiple significant advantages, the transparency of acrylic is extremely high, can reach the level close to glass, and even in some cases, the light transmittance can exceed 90%, is the ideal choice for making transparent products. Thus in the application, the welding mark position can be directly observed, thereby the stability in the welding process is guaranteed.

[0026] Meanwhile, acrylic is not susceptible to ultraviolet rays, rain and climate change, and has excellent weather resistance. Even after long-term use, it can maintain good color and light transmittance. Thus the service life of the body 10 can be improved, so as to reduce the use cost of the device. Acrylic has high impact strength, even if it breaks, it will not form sharp fragments, thereby reducing the safety risk. Acrylic material is not easy to break, and has high toughness, and can withstand certain external force impact. By arranging the above structure, the safety of the device during use can be improved.

[0027] In addition, compared with traditional materials such as glass, acrylic has a lower density and thus is lighter in weight. This can achieve the lightweight requirement of the device. Moreover, acrylic is easy to cut, drill, heat-bend, bond and form, and has excellent processing performance. This allows acrylic to be conveniently processed into products of various shapes and sizes. Acrylic material can be sawn, planed and milled on a plane like medium-density fiberboard, and can be cast and heat-bent into various three-dimensional shapes like plastic, without discoloration or degradation due to forming temperature. Acrylic is non-toxic to the human body and meets the 4R principles (Regrow, Reduce, Reuse, Recycle) of green products, and is a truly green and environmentally friendly material. Acrylic material can be completely recycled, and repeated use can reduce environmental pollution and meet the concept of sustainable development.

[0028] In an embodiment, the body 10 has a plurality of positioning holes 11 arranged at intervals on the body 10. In this way, the design of the plurality of positioning holes 11 can more effectively limit the degrees of freedom of the tab to be welded, ensuring the positional accuracy of the tab during welding. This high-precision positioning helps to reduce errors during welding, improving welding quality and reliability. At the same time, by fixing the tab firmly on the body 10 through the plurality of positioning holes 11, the stability during welding can be significantly enhanced. This helps to prevent the tab from moving or deforming during welding, thereby ensuring the strength and consistency of the welded joint.

[0029] Furthermore, the design of the plurality of positioning holes 11 makes the positioning and fixing of the tab simpler and faster. This helps to reduce the preparation time before welding, improving production efficiency. At the same time, since the design of the positioning holes 11 allows the tab to be more accurately positioned at the welding position, the adjustment time during welding can also be reduced, further improving production efficiency. At the same time, in an automated welding production line, the design of the plurality of positioning holes 11 can more easily cooperate with automated equipment. For example, by accurately placing the tab in the positioning hole 11 through a robot or automated clamp, efficient automated welding can be achieved. This not only improves production efficiency, but also reduces labor costs.

[0030] Further, the design of the plurality of positioning holes 11 can have a certain flexibility to adapt to different models and sizes of tabs. By adjusting the position of the tab in the positioning hole 11 or selecting different combinations of positioning holes 11, the positioning and fixing of tabs of different sizes can be achieved. This helps to expand the application range of the welding equipment and improve the utilization rate of the equipment.

[0031] In an embodiment, the body 10 is provided with a first region A and a second region B along its length direction, the positioning holes 11 in the first region A are used to position the welding position of the positive electrode tab of the first electrode assembly and are passed through by the welding device to weld the positive electrode tab of the second electrode assembly, and the positioning holes in the second region B are used to position the welding position of the negative electrode tab of the first electrode assembly and are passed through by the welding device to weld the negative electrode tab of the second electrode assembly. In this way, by setting the positioning hole 11 region specially used for the welding of the positive and negative electrode tabs, the positive and negative electrode tabs can be clearly distinguished to avoid confusion and misoperation. Moreover, the positioning holes 11 in each region are accurately designed and arranged to ensure that the electrode tab can be accurately and stably placed in the predetermined position, thereby improving the accuracy of welding. Furthermore, this design makes the operation process during welding clearer and standardized, which helps to improve production efficiency.

[0032] Further, by accurately distinguishing the welding positions of the positive and negative electrode tabs, the risk of short circuit caused by improper electrode tab position can be reduced, thereby improving the safety and reliability of the battery. This design helps to optimize the internal structure layout of the battery, so that the battery achieves a better balance in volume, weight and performance. During battery maintenance or upgrading, the staff can more easily identify the welding positions of the positive and negative electrode tabs, thereby simplifying the operation process.

[0033] At the same time, since the welding positions of the positive and negative electrode tabs are clearly distinguished, the risk of battery damage or performance degradation caused by misoperation can be reduced. This design can more easily cooperate with automatic welding equipment to achieve efficient and accurate automatic production. By welding the positive and negative electrode tabs through automatic equipment, production efficiency can be significantly improved and labor cost can be reduced.

[0034] In an embodiment, the extension length of the positioning hole 11 along the length direction of the body 10 is L1, and 14mm≤L1≤18mm. Within this length range, the positioning hole 11 can ensure accurate positioning of the electrode tab during welding. The appropriate length of the positioning hole 11 can prevent the electrode tab from shifting or shaking during welding, thereby ensuring the quality and stability of the welded joint. By accurately controlling the extension length of the positioning hole 11, errors and uncertainties during welding can be reduced, and the accuracy and reliability of welding can be improved. This length range allows the positioning hole 11 to adapt to electrode tabs of different sizes and shapes. In actual application, the appropriate length of the positioning hole 11 can be selected according to the size and shape of the electrode tab to ensure the best welding effect and battery performance.

[0035] Further, this design allows the same body 10 to be applicable to multiple types of batteries and tabs, improving the compatibility and versatility of the equipment. By properly arranging the positioning holes 11, it can be ensured that the positive and negative tabs inside the battery maintain sufficient distance, reducing the risk of short circuit and failure, thereby improving the safety and reliability of the battery. Within this length range, the manufacturing and processing of the positioning holes 11 are relatively simple, without the need for excessive equipment and process steps. This helps to reduce production costs and improve production efficiency. And by precisely controlling the extension length of the positioning holes 11, it can be ensured that the size and shape of each positioning hole 11 remain consistent, thereby improving the consistency and reliability of the battery.

[0036] In this application, L1 can be set to 14mm, 16mm or 18mm, etc.

[0037] In an embodiment, the extension length of the positioning hole 11 along the width direction of the body 10 is L2, 4mm≤L2≤8mm. Within this width range, the positioning hole 11 can accurately match the width of the tab, ensuring that the tab can be stably placed in the positioning hole 11 during welding. This helps to improve the accuracy and reliability of welding, reducing errors during the welding process. A suitable positioning hole 11 width can limit the movement range of the tab during welding, thereby reducing the occurrence of welding deformation and joint quality problems. This width range allows the positioning hole 11 to adapt to tabs of different width sizes. In actual application, the appropriate positioning hole 11 width can be selected according to the width of the tab to ensure the best welding effect and battery performance.

[0038] At the same time, this design allows the same body 10 to be applicable to multiple types of batteries and tabs, improving the compatibility and versatility of the equipment. A suitable positioning hole 11 width can optimize the internal structural layout of the battery, reducing unnecessary space occupation. This helps to reduce the weight and volume of the battery, improving the energy density and endurance of the battery. By properly setting the width of the positioning hole 11, it can be ensured that the positive and negative tabs inside the battery maintain appropriate distance, reducing the risk of short circuit and failure, thereby improving the safety and reliability of the battery.

[0039] Further, within this width range, the manufacturing and processing of the positioning hole 11 are relatively simple, without the need for excessive equipment and process steps. This helps to reduce production costs and improve production efficiency. A suitable positioning hole 11 width can make it easier for the tab to be inserted and fixed in the positioning hole 11, thereby improving assembly efficiency and quality. By precisely controlling the width of the positioning hole 11, it can be ensured that the size and shape of each positioning hole 11 remain consistent, thereby improving the consistency and reliability of the battery. A suitable positioning hole 11 width can ensure the stability and reliability of the tab during welding and assembly, thereby improving the reliability and service life of the entire battery.

[0040] In this application, L2 can be set to 4mm, 6mm, or 8mm, etc.

[0041] In an embodiment, the positioning member further comprises a limiting hole 12, which is symmetrically arranged along the length direction of the body 10, and is used to limit the position of the body 10. The limiting hole 12 can accurately limit the position of the body 10, preventing the positioning member from shifting or shaking during welding or assembly. This precise positioning helps to ensure the connection quality and stability between the tab and the body 10.

[0042] By setting the limiting hole 12, it helps to reduce errors and uncertainties during welding or assembly, improving the stability and reliability of the overall structure. The design of the limiting hole 12 makes the assembly process of the positioning member more simple and fast. Workers can more easily insert the positioning member into the external assembly and quickly complete the fixing and connection work. Due to the precise limiting effect of the limiting hole 12, the adjustment and correction time during assembly is greatly reduced. This helps to improve assembly efficiency and reduce production costs.

[0043] In an embodiment, the inner diameter of the limiting hole 12 is φ, 6mm ≤ φ ≤ 10mm. Within this inner diameter range, the limiting hole 12 can adapt to positioning members of various sizes. This means that during the design and manufacturing process, the appropriate positioning member size can be selected according to actual needs to ensure the best assembly effect and battery performance. Due to the flexibility of the limiting hole 12 inner diameter, the same body 10 can be compatible with multiple types of positioning members, improving the versatility and compatibility of the device. The appropriate limiting hole 12 inner diameter can ensure the precise fit between the positioning member and the external assembly. This precise fit helps to reduce errors and uncertainties during assembly, improving the stability and reliability of the overall structure.

[0044] At the same time, by limiting the movement range of the positioning member in the limiting hole 12, it can reduce the shaking and displacement after assembly. Within this inner diameter range, the limiting hole 12 is relatively simple to manufacture and process, without the need for excessive equipment and process steps. This helps to reduce production costs and improve production efficiency. By precisely controlling the inner diameter of the limiting hole 12, it can ensure that the size and shape of each limiting hole 12 remain consistent. And the design of the limiting hole 12 can more easily cooperate with automated assembly equipment, achieving efficient and precise automated production.

[0045] In this application, φ can be set to 6mm, 8mm, or 10mm, etc.

[0046] In an embodiment, a transition structure 13 is further provided at the edge of the body 10. The transition structure 13 can disperse stress and reduce stress concentration in force conditions, thereby improving the stability and durability of the overall structure. The transition structure 13 makes the edge of the body 10 present a smooth and flowing line, avoiding a sense of abruptness and harshness, and improving the overall aesthetics of the product. The smooth transition structure 13 can reduce friction and wear with other objects, prolonging the service life of the product. At the same time, the design of the transition structure 13 makes the assembly process simpler and faster, reducing assembly difficulty and time cost. By precisely designing and manufacturing the transition structure 13, the accuracy and precision in the assembly process can be ensured, thereby improving the performance and quality of the overall structure.

[0047] In an embodiment, the transition structure 13 includes a fillet with a radius R, 0.5mm≤R≤2mm. The fillet can disperse stress at the edge of the structure and reduce stress concentration, thereby enhancing the strength and durability of the structure. In force conditions, the fillet can effectively alleviate the concentration of stress and prevent the structure from being damaged due to excessive local stress. The fillet makes the edge of the structure present a smooth and flowing line, avoiding a sense of abruptness and harshness. This design not only improves the overall aesthetics of the product, but also makes the product more in line with the ergonomic principle, improving the comfort of use. In the manufacturing process, the design of the fillet can simplify the processing flow and reduce the processing difficulty and cost. At the same time, the fillet can also reduce the wear of the tool and prolong the service life of the tool.

[0048] Further, the design of the fillet makes the structure easier to align and fix during assembly, improving assembly efficiency and precision. At the same time, the fillet can also reduce friction and resistance during assembly, making the assembly process smoother. The design of the fillet can adapt to a variety of different working environments and use conditions, improving the adaptability and versatility of the product. This design enables the product to maintain good performance and stability in different environments.

[0049] Furthermore, in products that need to come into contact with users, the design of the fillet can improve user comfort and satisfaction. The fillet can reduce friction and pressure on the human body caused by the edges of the product, making users feel more comfortable during use. The design of the fillet can reduce the risk of cuts caused by sharp corners, improving the safety of the product. This design is particularly important in medical devices, toys and other products that need to come into direct contact with users.

[0050] In the present application, R can be set to 0.5mm, 1mm or 2mm, etc.

[0051] In an embodiment, a scale structure 14 is provided at the edge of the positioning hole 11 in the circumferential direction, which is used to measure the size of the tab located in the positioning hole 11. The scale structure 14 provides an intuitive and accurate measurement method. By reading the numerical value on the scale, the size of the tab in the positioning hole 11 can be accurately determined. This measurement method is more accurate and reliable than traditional measurement methods, which helps to ensure the assembly quality and performance of the battery assembly. At the same time, the operator does not need to use complex measuring tools or equipment, but only needs to read the numerical value on the scale through visual observation to quickly obtain the size information of the tab. This not only improves work efficiency, but also reduces measurement cost.

[0052] Further, the scale structure 14 is usually designed to be clear and eye-catching, so that the operator can easily read the numerical value. In addition, the scale structure 14 can also be customized according to the needs to meet the measurement needs of different size tabs. This design enhances the readability and ease of use of the scale structure 14, and improves the satisfaction and work efficiency of the operator.

[0053] The technical scheme of the utility model is applied, the positioning hole 11 is arranged on the body 10, in the welding process of the tab, the body 10 is placed on the welding table, then the position of the positioning hole 11 is compared with the welded mark position, if the welded mark position and the positioning hole 11 position of the body 10 exist deviation, then the position of the welding machine is adjusted, the next time welding position and the existing mark calibration position coincide, thereby the consistency of the multiple battery core marks can be guaranteed, and the good product rate of the product is beneficial to guarantee.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0055] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0056] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0057] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0058] In addition, it needs to be explained that the use of "first", "second" and the like to limit parts only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0059] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning member, characterized by, The positioning member comprises: a body having positioning holes penetrating through the body along the height direction of the body, the positioning holes being used for positioning the welding position of the tab of the first electrode assembly, the welding position of the tab of the first electrode assembly being used for adjusting the to-be-welded position of the tab of the second electrode assembly, and the positioning holes also being used for allowing a welding device to pass through to weld the tab of the second electrode assembly.

2. The positioning member according to claim 1, characterized in that, The body has a plurality of the positioning holes, and the plurality of the positioning holes are arranged at intervals on the body.

3. The positioning member according to claim 2, wherein The body is provided with a first region and a second region along the length direction of the body, the positioning holes in the first region are used for positioning the welding position of the positive tab of the first electrode assembly and allowing the welding device to pass through to weld the positive tab of the second electrode assembly, and the positioning holes in the second region are used for positioning the welding position of the negative tab of the first electrode assembly and allowing the welding device to pass through to weld the negative tab of the second electrode assembly.

4. The positioning member according to any one of claims 1 to 3, characterized in that, The extension length of the positioning holes along the length direction of the body is L1, and 14 mm≤L1≤18 mm.

5. The positioning member according to any one of claims 1 to 3, wherein The extension length of the positioning holes along the width direction of the body is L2, and 4 mm≤L2≤8 mm.

6. The positioning member according to any one of claims 1 to 3, wherein The positioning member further comprises limiting holes, the limiting holes being symmetrically arranged along the length direction of the body, and the limiting holes being used for limiting the position of the positioning member.

7. The positioning member of claim 6, wherein, The inner diameter of the limiting hole is φ, and 6 mm≤φ≤10 mm.

8. The positioning member according to any one of claims 1 to 3, wherein The edge of the body is further provided with a transition structure.

9. The positioning member of claim 8, wherein, The transition structure comprises a fillet, and the radius of the fillet is R, and 0.5 mm≤R≤2 mm.

10. The positioning member according to any one of claims 1 to 3, wherein A marking line structure is arranged at the edge along the circumference of the positioning hole, and the marking line structure is used for marking the welding position of the tab of the first electrode assembly.

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