Lithium battery green termination tape with positioning scale

Abstract

The utility model provides a kind of lithium battery green termination adhesive tape with positioning scale, it is related to termination adhesive tape technical field, including middle fibre scale layer, lower substrate layer and upper substrate layer, the bottom of middle fibre scale layer is bonded with lower substrate layer, the top of middle fibre scale layer is bonded with upper substrate layer, scale hole groove is spaced apart in middle fibre scale layer, the inside of scale hole groove is fixedly connected with horizontal scale bar and longitudinal scale bar in interval array mode, and the top of scale hole groove is provided with middle scale groove in interval arrangement. Horizontal scale bar and middle scale groove are positioned scale in the length direction of middle fibre scale layer, realize the auxiliary positioning identification of the starting position when adhesive tape is pasted pole piece, adapt to automatic production line vision detection system, ensure that the consistency of adhesive tape pasting position and length, solve the problem that the starting position deviation of adhesive tape becomes larger, pole piece pasting length is not consistent, appears missing, misplaces, affects production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of termination tape technology, and in particular to a green termination tape for lithium batteries with positioning scale. Background Technology

[0002] Lithium battery termination tape is a functional insulating tape that is applied to the ends of lithium battery electrodes. The green lithium battery termination tape is made of environmentally friendly materials, and its green color is for easy visual identification during the production process, distinguishing it from tapes of other colors.

[0003] Traditional green termination tape for lithium batteries is a green, semi-transparent film structure. It does not have positioning scales and the application length needs to be controlled by controlling the range of tape movement. However, the error will gradually increase with long-term use, the application positioning accuracy of the tape will decrease, the starting position deviation will become larger, the electrode application length will be inconsistent, and there will be omissions and misapplications, which will affect production efficiency. Summary of the Invention

[0004] This invention provides a green termination tape for lithium batteries with positioning scales. The transverse scale strips and the central scale groove are distributed at intervals along the length direction of the medium fiber scale layer. The transverse scale strips and the central scale groove serve as positioning scales along the length direction of the medium fiber scale layer, enabling auxiliary positioning and identification of the starting position when the tape is applied to the electrode sheet. It is compatible with the visual inspection system of automated production lines to ensure the consistency of the tape application position and length.

[0005] This utility model provides a green termination tape for lithium batteries with positioning scales, specifically including a medium fiber scale layer, a lower substrate layer, and an upper substrate layer. The lower substrate layer is adhesively bonded to the bottom of the medium fiber scale layer, and the upper substrate layer is adhesively bonded to the top of the medium fiber scale layer. The medium fiber scale layer has scale slots spaced apart. Horizontal scale strips and vertical scale strips are fixedly connected in a horizontal and vertical array along the inner side of the scale slots. Medium scale slots are spaced apart along the length of the tape at the top of the scale slots. The medium fiber scale layer is made of glass fiber reinforced polyester. A thin layer of adhesive is coated on the top and bottom of the medium fiber scale layer. The adhesive is cured by heating and pressurizing to achieve a strong interlayer bond between the medium fiber scale layer, the lower substrate layer, and the upper substrate layer. Environmentally friendly green pigments are added to both the upper and lower substrate layers.

[0006] Furthermore, the horizontal and vertical scale bars are interlaced to form a grid structure, and the scale hole grooves are filled with adhesive to enhance structural strength and assist in scale color development. The adhesive fills the gaps between the horizontal and vertical scale bars to keep them flat, and the central scale groove is located between the scale hole grooves.

[0007] Furthermore, the bottom of both the horizontal and vertical scale bars is flush with the bottom of the medium fiber scale layer, and the top of the horizontal scale bar is flush with the top of the medium fiber scale layer. The grid structure formed by the vertical and horizontal scale bars is integrated with the positioning scale, and the scale bars serve as both positioning markers and structural reinforcement skeletons.

[0008] Furthermore, the top of the longitudinal scale bar is lower than the top of the transverse scale bar, and the bottom of both the longitudinal and transverse scale bars are glued to the substrate layer.

[0009] Furthermore, the top of each of the transverse scale strips is glued with an upper substrate layer, which covers the top of the medium fiber scale layer, the scale hole groove, the longitudinal scale strip, the transverse scale strip, and the medium scale groove. The medium fiber scale layer, together with the lower substrate layer and the upper substrate layer, forms a multi-layer insulating barrier for the end of the lithium battery electrode.

[0010] Furthermore, an adhesive layer is coated on the bottom of the lower substrate layer, and the lower substrate layer is bonded to the end of the lithium battery electrode through the adhesive layer.

[0011] Furthermore, the central scale groove and the horizontal scale strip are arranged parallel to each other. The inner side of the central scale groove is glued and fixed with white environmentally friendly pigment modified PET material. The horizontal scale strip is made of white environmentally friendly pigment modified PET material, which forms a color difference contrast with the green of the medium fiber scale layer, thereby improving the visual recognition of the scale. The central scale groove and the horizontal scale strip are used to mark the starting position of the electrode sheet application.

[0012] This utility model provides a green termination tape for lithium batteries with positioning scales, which has the following beneficial effects: The transverse scale bars and the middle scale grooves are distributed at intervals along the length of the medium fiber scale layer. The transverse scale bars and the middle scale grooves serve as positioning scales along the length of the medium fiber scale layer, enabling auxiliary positioning and identification of the starting position when the tape is applied to the electrode sheet. This is compatible with the vision inspection system of automated production lines, ensuring the consistency of the tape application position and length, and reducing processing errors.

[0013] The medium fiber graduation layer forms a grid structure through graduation holes and grooves, as well as transverse and longitudinal graduation strips. This serves as both a positioning marker and enhances the overall tensile strength and toughness of the tape, avoiding the increase in tape thickness caused by setting up a separate graduation layer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0016] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 This diagram illustrates the structural state of the bonding between the fiber optic scale layer and the lower substrate layer in this application. Figure 3 This diagram illustrates the structural schematic of the bonding state between the fiber optic scale layer and the upper substrate layer in this application. Figure 4 A schematic diagram of the fiber optic scale layer structure of this application is shown; Figure 5 A schematic diagram of the longitudinal scale bar of this application is shown; Figure 6 This diagram shows a structural schematic of the separation state of the middle fiber scale layer, the lower substrate layer, and the upper substrate layer in this application; Figure label: 1. Medium fiber graduation layer; 101. Graduation hole groove; 102. Horizontal graduation strip; 103. Vertical graduation strip; 104. Medium graduation groove; 2. Substrate layer; 201. Adhesive layer; 3. Apply the substrate layer. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] Example 1: Please refer to Figures 1 to 6 : This invention proposes a green termination tape for lithium batteries with positioning scales, comprising a middle fiber scale layer 1, a lower substrate layer 2, and an upper substrate layer 3. The middle fiber scale layer 1 has scale slots 101 spaced apart. Horizontal scale strips 102 and vertical scale strips 103 are fixedly connected to the inner side of the scale slots 101 in a horizontal and vertically spaced array. Middle scale slots 104 are spaced apart along the tape length direction at the top of the scale slots 101. The middle fiber scale layer 1 is made of glass fiber reinforced polyester. A thin layer of adhesive is coated on the top and bottom of the middle fiber scale layer 1. The adhesive is cured by heating and pressurizing, achieving a strong interlayer bond between the middle fiber scale layer 1, the lower substrate layer 2, and the upper substrate layer 3. Environmentally friendly green pigments are added to both the upper substrate layer 3 and the lower substrate layer 2. The material has a grid structure formed by the interlacing of horizontal scale bars 102 and vertical scale bars 103. The scale hole groove 101 is filled with adhesive to enhance the structural strength and assist in scale color display. The adhesive fills the gap between the horizontal scale bars 102 and the vertical scale bars 103 to keep them flat. The middle scale groove 104 is located between the scale hole grooves 101. The top of the vertical scale bar 103 is lower than the top of the horizontal scale bar 102. The bottom of both the vertical scale bar 103 and the horizontal scale bar 102 are glued to the lower substrate layer 2. The bottom of the middle fiber scale layer 1 is glued to the lower substrate layer 2. The bottom of the lower substrate layer 2 is coated with an adhesive layer 201. The lower substrate layer 2 is bonded to the end of the lithium battery electrode through the adhesive layer 201. The top of the middle fiber scale layer 1 is glued to the upper substrate layer 3.

[0019] In this embodiment, the bottom of both the horizontal scale bar 102 and the vertical scale bar 103 is flush with the bottom of the medium fiber scale layer 1, and the top of the horizontal scale bar 102 is flush with the top of the medium fiber scale layer 1. The grid structure formed by the vertical scale bar 103 and the horizontal scale bar 102 is integrated with the positioning scale. The scale bar serves as both a positioning marker and a structural reinforcement skeleton, avoiding the increase in tape thickness caused by setting a separate scale layer.

[0020] In this embodiment, the top of the transverse scale strip 102 is glued to the upper substrate layer 3. The upper substrate layer 3 covers the top of the medium fiber scale layer 1, the scale hole groove 101, the longitudinal scale strip 103, the transverse scale strip 102, and the medium scale groove 104. The medium fiber scale layer 1, together with the lower substrate layer 2 and the upper substrate layer 3, forms a multi-layer insulating barrier for the end of the lithium battery electrode, thereby improving the electrical insulation strength.

[0021] In this embodiment, the central scale groove 104 and the transverse scale strip 102 are arranged parallel to each other. The inner side of the central scale groove 104 is glued and fixed with white environmentally friendly pigment modified PET material. The transverse scale strip 102 is also made of white environmentally friendly pigment modified PET material, which forms a color difference contrast with the green of the medium fiber scale layer 1, thereby improving the visual recognition of the scale. The central scale groove 104 and the transverse scale strip 102 are used to mark the starting position of the electrode sheet application, which is compatible with the visual inspection system of the automated production line, meets the needs of large-scale mass production of power batteries, improves the automated application speed, improves the tape application efficiency, and reduces the occurrence of missed or incorrect applications.

[0022] In this second embodiment, based on the first embodiment, a central scale groove 104 is provided between the scale holes 101 of the medium fiber scale layer 1, which is in the same direction as the longitudinal scale strip 103, to realize the positioning scale marking of half the width of the medium fiber scale layer 1, and to realize the marking of the positioning width in both the horizontal and vertical directions.

[0023] The working principle of this embodiment is as follows: The materials of the lower substrate layer 2 and the upper substrate layer 3 can be PET (polyethylene terephthalate) and PI (polyimide), depending on the requirements. The grid skeleton formed by the interlacing of the horizontal scale strips 102 and the vertical scale strips 103, together with the medium fiber scale layer 1, forms a composite support structure, which improves the tensile strength and bending resistance of the tape. Under conditions such as lithium battery winding tension and assembly extrusion, there is no tearing or breakage, and the structure has high stability, which is suitable for the stringent operational requirements of automated production of power batteries. The lower substrate layer 2 is bonded to the end of the lithium battery electrode through the adhesive layer 201. The medium fiber scale layer 1, together with the lower substrate layer 2 and the upper substrate layer 3, forms a multi-layer insulating barrier for the end of the lithium battery electrode, improving the electrical insulation strength and effectively resisting the electrode. The risk of puncture and breakdown from burrs and metal fragments is reduced, meeting the insulation safety requirements of high-voltage power batteries. The central scale groove 104 and the transverse scale bar 102 are distributed at intervals along the length of the tape. The central scale groove 104 and the transverse scale bar 102 can be quickly identified by the visual inspection system of the automated production line, realizing the control of the starting position of the tape to cover the electrode, improving the tape positioning accuracy, and reducing the error of the consistency of the electrode covering length. The grid structure formed by the longitudinal scale bar 103 and the transverse scale bar 102 is integrated with the positioning scale design. The scale bar serves as both a positioning mark and a structural reinforcement skeleton, avoiding the increase in tape thickness caused by setting a separate scale layer. Moreover, the scale design does not affect the original bonding performance of the tape. It can be directly adapted without modifying the existing automated covering equipment. The equipment can be reused, reducing the production line changeover cost. The positioning scale composed of the central scale groove 104 and the transverse scale bar 102 meets the recognition requirements of the vision inspection system of the automated production line. It eliminates the need for manual calibration, improves the speed of automated application, increases tape application efficiency, reduces missed or incorrect applications, reduces rework costs, and adapts to the needs of large-scale production of power batteries. It solves the problems of low positioning accuracy and difficulty in identifying the starting position when applying traditional unscaled termination tapes in automated application, which leads to inconsistent electrode application lengths, and the vision inspection system's inability to accurately capture positioning points, resulting in missed or incorrect applications and affecting production efficiency.

[0024] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments disclosed herein; other structures may refer to general designs.

[0025] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0026] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A green termination tape for lithium batteries with positioning graduations, comprising: The medium fiber scale layer (1), the lower substrate layer (2) and the upper substrate layer (3) are characterized in that the lower substrate layer (2) is bonded to the bottom of the medium fiber scale layer (1), the upper substrate layer (3) is bonded to the top of the medium fiber scale layer (1), the medium fiber scale layer (1) is provided with scale holes (101) at intervals, the inner side of the scale holes (101) is fixedly connected with the horizontal scale strips (102) and the vertical scale strips (103) in an array at intervals, and the top of the scale holes (101) is provided with medium scale grooves (104) at intervals.

2. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The horizontal scale bar (102) and the vertical scale bar (103) are interwoven to form a grid structure, and the central scale groove (104) is located between the scale hole groove (101).

3. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The bottom of the horizontal scale bar (102) and the vertical scale bar (103) are flush with the bottom of the medium fiber scale layer (1), and the top of the horizontal scale bar (102) is flush with the top of the medium fiber scale layer (1).

4. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The top of the longitudinal scale bar (103) is lower than the top of the transverse scale bar (102), and the bottom of both the longitudinal scale bar (103) and the transverse scale bar (102) are bonded to the substrate layer (2).

5. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The top of each of the transverse scale strips (102) is bonded with an upper substrate layer (3), which covers the top of the medium fiber scale layer (1), the scale hole groove (101), the longitudinal scale strip (103), the transverse scale strip (102), and the medium scale groove (104).

6. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The bottom of the lower substrate layer (2) is coated with an adhesive layer (201).

7. The green termination tape for lithium batteries with positioning scales according to claim 1, characterized in that, The central scale groove (104) and the horizontal scale bar (102) are arranged parallel to each other.

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