Material belt edge cutting equipment and material belt roller press
The cutting and shaping of the thick lithium belt rolled into thin lithium belts during the production process of lithium-ion batteries through the tape edge cutting equipment, the edge defect problem is solved, the uniformity and flatness of the tape cover layer is achieved, and the production quality and processing efficiency are improved.
Patent Information
- Application Number
- CN202422073355.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-26
AI Technical Summary
During the production process of lithium-ion batteries, when the thick lithium belt is rolled into a thin lithium belt, it is easy to cause lateral extension to lead to edge defects and poor edge straightness, which affects subsequent use and processing.
The tape edge cutting equipment is used to cut and shape the cover layer of the tape through the cutting mechanism and the scraper mechanism, and the edge of the tape is accurately cut and scraped with the cutter assembly and scraper parts to ensure the uniform shape of the covering layer.
It improves the production quality of the material belt, ensures the edges of the cover layer are flat, and reduces defects. It is suitable for substrates and cover layers of different thicknesses, improving product quality and subsequent processing efficiency.
Smart Images
Figure CN223175437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production, in particular to a material strip trimming device and a material strip roller press. Background Art
[0002] During the first charge and discharge process of lithium-ion batteries, a solid electrolyte film will form on the negative electrode, which will consume the active lithium ions of the positive electrode, resulting in a decrease in battery energy density and a shortened cycle life. Replenishing lithium to the electrode is an effective means to improve the energy density and cycle life of lithium-ion batteries. However, replenishing lithium to the electrode requires the preparation of ultra-thin metal lithium with a thickness of 1-10um. In addition, metal lithium has a high capacity of 3860mAh / g and a low density of 0.534g / cm 3 Due to the characteristics of lithium metal, lithium batteries and all-solid-state batteries using lithium metal as the negative electrode have advantages such as high energy density and high voltage, and are also the current research direction of high-energy-density batteries. The thickness of lithium required for the general coating strip is 10-50um. Therefore, whether it is a lithium replenishment process or a strip production process, it is necessary to prepare a lithium strip of 1-50um. The production process often uses a release film as a carrier. The thick lithium strip with a thickness of 1-1.6mm is rolled to 1-50um by double or multi-roller rolling and attached to the carrier release film, and then rolled for subsequent use. In this production process, due to the large deformation of the thick lithium strip when rolled into a thin lithium strip, the lithium strip will extend horizontally, resulting in defects such as burrs and voids on the edges of the prepared ultra-thin lithium, affecting subsequent use and processing; in addition, during the preparation of the thin lithium strip, the thick lithium strip will shift relative to the carrier film, resulting in poor edge straightness of the prepared ultra-thin lithium strip, which will affect the alignment of the edges during subsequent strip feeding.
[0003] Therefore, there is an urgent need to provide a new type of strip trimming equipment and strip rolling machine to solve the above-mentioned technical problems in the prior art. Utility Model Content
[0004] The purpose of the utility model is to provide a material strip trimming device, which can cut and shape the covering layer on the edge of the material strip so that the covering layer on the surface of the material strip has a uniform shape, thereby improving the production quality of the material strip.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] The strip trimming device is used for trimming and shaping the covering layer of a strip conveyed in a preset direction. The strip includes a base body and the covering layer covering the upper surface of the base body. The strip trimming device includes a cutting mechanism and a scraping mechanism. The cutting mechanism includes a first support roller and two cutter assemblies. The two cutter assemblies are respectively arranged at both ends in the width direction of the strip. The strip is clamped between the bottom ends of the cutter assemblies and the first support roller. The gap thickness between the cutter assemblies and the upper surface of the base body is less than the thickness of the covering layer, so that cutting lines are cut at both ends in the width direction of the covering layer. The scraping mechanism is arranged downstream of the cutting mechanism along the strip conveying direction. The scraping mechanism includes a second support roller and two scraping members respectively arranged at both ends in the width direction of the strip. The strip is clamped between the bottom ends of the scraping members and the second support roller. One end of the scraping member is aligned with the cutting line, and the other end extends beyond the side edges at both ends in the width direction of the strip.
[0007] Optionally, the cutter assembly includes a fixed bracket and a cutter body. The cutter body is slidably connected to the inner wall of the fixed bracket, so that the position of the cutter body in the height direction is adjustable. The cutter body is used for cutting the covering layer.
[0008] Optionally, the cutter assembly further includes an adjusting bracket. The cutter body is rotatably connected to the adjusting bracket. The adjusting bracket is slidably connected to the fixed bracket. A cleaning member is arranged on the inner top wall of the adjusting bracket. The cutter body abuts against the cleaning member.
[0009] Optionally, any one of the connecting members between the fixed bracket and the adjusting bracket is limitedly connected with a connecting piece, and the other of the connecting members between the fixed bracket and the adjusting bracket is threadedly connected with the connecting piece.
[0010] Optionally, an elastic member is arranged between the inner top wall of the fixed bracket and the top wall of the adjusting bracket. The connecting piece is arranged through the elastic member, and the elastic member is in a compressed state.
[0011] Optionally, the cleaning member is any one of a sponge pad, a wool felt, and a cotton pad, and the cleaning member is stained with silicone oil and can coat the silicone oil on the surface of the cutter body.
[0012] Optionally, the cutting mechanism further includes an adjusting track. The adjusting track extends along the width direction of the strip. The cutter assembly is slidably connected to the adjusting track.
[0013] Optionally, the scraping mechanism further includes a scraping track. The scraping track extends along the width direction of the strip. The scraping member is slidably connected to the scraping track.
[0014] Optionally, the above scraping mechanism further includes a dust suction device, and the suction port of the dust suction device is disposed opposite to the scraping member.
[0015] Another object of the present invention is to provide a strip roll press for producing a strip, the strip including a substrate and a covering layer covering the upper surface of the substrate, and the strip roll press further includes a strip trimming device as described in any of the above solutions.
[0016] Beneficial effects:
[0017] In the strip trimming device of the present invention, the first support roller is used to support the strip, and then the cutter assembly trims the covering layers at both ends in the width direction of the strip. Since the thickness of the gap between the cutter assembly and the upper surface of the substrate is less than the thickness of the covering layer, a cutting line can be cut out on the covering layer. During the process of the strip being conveyed downstream, the second support roller supports the strip, and then the scraping member aligns with the cutting line on the strip, and scrapes off the covering layer between the cutting line and the edge of the strip, so that the covering layer of the strip is shaped into a flat edge without defects. The strip trimming device can trim and shape the edge of the covering layer of the strip, making the shape of the covering layer on the strip surface uniform, improving the production quality of the strip, facilitating the use in subsequent production process flows, and improving the product quality. Description of the drawings
[0018] Figure 1 is a schematic diagram of the strip trimming device provided by the specific embodiment of the present invention;
[0019] Figure 2 is an axonometric view of the cutter assembly provided by the specific embodiment of the present invention.
[0020] In the figure:
[0021] 10. Substrate; 11. Covering layer; 12. Cutting line;
[0022] 110. First support roller; 120. Cutter assembly; 121. Fixed bracket; 122. Cutter body; 123. Adjusting bracket; 124. Connecting member; 125. Elastic member; 126. Cleaning member; 127. Sliding groove;
[0023] 210. Second support roller; 220. Scraping member. Specific embodiments
[0024] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.
[0025] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0026] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.
[0027] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0028] Such as Figure 1 And Figure 2As shown in the figure, the tape edge trimming device is used for trimming and shaping the covering layer 11 of the tape conveyed in a preset direction. The above-mentioned tape includes a base body 10 and the above-mentioned covering layer 11 covering the upper surface of the above-mentioned base body 10. The tape edge trimming device includes a cutting mechanism and a scraping mechanism. The above-mentioned cutting mechanism includes a first support roller 110 and two cutter assemblies 120. The two above-mentioned cutter assemblies 120 are respectively arranged at both ends in the width direction of the tape. The tape is clamped between the bottom end of the above-mentioned cutter assembly 120 and the above-mentioned first support roller 110. The gap thickness between the above-mentioned cutter assembly 120 and the upper surface of the above-mentioned base body 10 is smaller than the thickness of the above-mentioned covering layer 11, so that cutting lines 12 are cut out at both ends of the above-mentioned covering layer 11 in the width direction. The above-mentioned scraping mechanism is arranged downstream of the above-mentioned cutting mechanism along the tape conveying direction. The above-mentioned scraping mechanism includes a second support roller 210 and two scraping members 220 respectively arranged at both ends in the width direction of the tape. The tape is clamped between the bottom end of the above-mentioned scraping member 220 and the above-mentioned second support roller 210. One end of the above-mentioned scraping member 220 is aligned with the above-mentioned cutting line 12, and the other end extends beyond the side edges of both ends of the tape in the width direction.
[0029] In this embodiment, the tape edge trimming device uses the first support roller 110 to support the tape. Subsequently, the cutter assembly 120 trims the covering layer 11 at both ends in the width direction of the tape. Since the gap thickness between the cutter assembly 120 and the upper surface of the base body 10 is smaller than the thickness of the covering layer 11, the covering layer 11 can be cut out with cutting lines 12. During the process of the tape being conveyed downstream, the second support roller 210 supports the tape. Subsequently, the scraping member 220 is aligned with the cutting line 12 on the tape, and the covering layer 11 between the cutting line 12 and the edge of the tape is scraped off, so that the covering layer 11 of the tape is shaped into a flat edge without defects. The tape edge trimming device can trim and shape the edges of the covering layer 11 of the tape, making the shape of the covering layer 11 on the tape surface uniform, improving the production quality of the tape, facilitating the use in subsequent production process flows, and improving the product quality.
[0030] In this embodiment, the above-mentioned tape is a thin lithium tape formed after a thick lithium tape is roll-pressed. Its base body 10 is a foil made of metal or a film made of non-metallic material. The foil made of metal material includes metal foils such as copper foil, aluminum foil, and nickel foil that can play a supporting role. The non-metallic films include PET film, PP film, PE film, etc. As long as it is a foil or film that can play a supporting role and does not react with lithium, it will not be elaborated here.
[0031] Further, the cutter assembly 120 includes a fixed bracket 121 and a cutter body 122. The cutter body 122 is slidably connected to the inner wall of the fixed bracket 121 so that the position of the cutter body 122 in the height direction is adjustable. The cutter body 122 is used to cut the cover layer 11. Since the position of the cutter body 122 in the height direction is adjustable, the gap thickness between the cutter body 122 and the upper surface of the substrate 10 can be adjusted, so as to be applicable to substrates 10 of different thicknesses and cover layers 11 of different thicknesses, with a wider application range and better cutting effect.
[0032] In this embodiment, the cutter assembly 120 further includes an adjusting bracket 123. The cutter body 122 is rotatably connected to the inside of the adjusting bracket 123. The adjusting bracket 123 is slidably connected to the fixed bracket 121. A cleaning member 126 is provided on the inner top wall of the adjusting bracket 123. The cutter body 122 abuts against the cleaning member 126. The function of the cleaning member 126 is to clean the edge of the cutter body 122, so that the lithium debris adhered to the cutter body 122 during the cutting of the cover layer 11 is swept by the cleaning member 126, avoiding the influence of these lithium debris on the subsequent tape cutting and ensuring that the cover layer 11 of the tape is cut out with a flat, smooth and defect-free cutting line 12.
[0033] As a preferred embodiment, the cleaning member 126 is any one of a sponge pad, a wool felt, and a cotton pad, and the cleaning member 126 is stained with silicone oil and can coat the silicone oil on the surface of the cutter body 122. The cleaning member 126 is specifically an object with a soft and porous loose structure, which can clean the cutter body 122 without damaging the cutter body 122, and at the same time can absorb silicone oil and coat the silicone oil on the surface of the cutter body 122 to avoid the cutter body 122 being contaminated by the debris generated during the cutting of the cover layer 11. Of course, the cleaning member 126 is stained with silicone oil, but it is not limited to silicone oil here, and any release agent that does not react with metallic lithium is acceptable.
[0034] Specifically, a sliding groove 127 is provided on the inner side wall of the fixed bracket 121, and a convex portion is provided on the side wall of the adjusting bracket 123. The sliding connection between the adjusting bracket 123 and the fixed bracket 121 is realized through the cooperation of the convex portion and the sliding groove 127, and it can also play a limiting role to ensure the stable adjustment of the adjusting bracket 123 and the cutter body 122.
[0035] Optionally, any one of the fixing bracket 121 and the connecting member 124 of the adjusting bracket 123 is limit-connected to the connecting member 124, and the other is threadedly connected to the connecting member 124. In this embodiment, the connecting member 124 is fixedly limited on the fixing bracket 121, and the end of the connecting member 124 is threadedly connected to the adjusting bracket 123. By screwing the connecting member 124, the position of the fixing bracket 121 can be moved up and down, so as to drive the cutting tool body 122 to change the height position. Its adjustment method is simple and reliable, and the stability is better after adjustment, which is beneficial to cutting out a smooth cutting line 12.
[0036] Please continue to refer to Figure 2 , an elastic member 125 is provided between the inner top wall of the fixing bracket 121 and the top wall of the adjusting bracket 123. The connecting member 124 passes through the elastic member 125, and the elastic member 125 is in a compressed state. Since the elastic member 125 is in a compressed state, the elastic member 125 can apply pressure to the adjusting bracket 123, so that the cutting tool body 122 connected to the adjusting bracket 123 is pressed against the tape, improving the cutting effect of the cutting tool body 122 on the covering layer 11. At the same time, the compression force of the elastic member 125 can be changed according to the adjustment of the connecting member 124, so as to provide different magnitudes of pressure, enabling the cutting tool body 122 to better cut out a smooth cutting line 12.
[0037] Optionally, the cutting mechanism further includes an adjusting track, and the adjusting track extends along the width direction of the tape. The cutter assembly 120 is slidably connected to the adjusting track. Thus, the distance between the cutter assemblies 120 is adjustable, and the position of the cutter assembly 120 in the horizontal direction is also adjustable, enabling the cutting mechanism to cut tapes with different widths and different placement positions, with a wider application range.
[0038] Furthermore, the scraping mechanism further includes a scraping track, and the scraping track extends along the width direction of the tape. The scraping member 22 is slidably connected to the scraping track. Corresponding to the position-adjustable cutter assembly 120, the position of the scraping member 220 is also adjustable, so as to completely scrape the covering layer 11 between the cutting line 12 cut by the cutter assembly 120 and the edge of the tape, with a wider application range and a better scraping effect.
[0039] In this embodiment, the scraping mechanism further includes a dust suction device, and the suction port of the dust suction device is arranged opposite to the scraping member 220. The dust suction device can adsorb the debris of the covering layer 11 scraped by the scraping member 220, so as to recycle the debris of the covering layer 11, thereby reducing the raw material cost, and can avoid the debris of the covering layer 11 from polluting the working environment, improving safety and protecting the working environment.
[0040] It should be noted that the above cutting tool assembly 120 can be replaced with a laser cutting tool to cut the covering layer 11 by laser cutting to obtain the cutting line 12. However, the laser cutting method has a high cost and a large safety risk. High-temperature baking of the covering layer 11 and the substrate 10 made of metallic lithium is likely to cause a fire and pose a safety hazard. Those skilled in the art can select according to specific requirements, which will not be elaborated here.
[0041] This embodiment also provides a strip roll press for producing strips. The above strip includes a substrate 10 and a covering layer 11 covering the upper surface of the substrate 10. The above strip roll press further includes a strip edge trimming device as described in any of the above solutions. The strip roll press rolls a thick lithium strip to form a thin lithium strip, and then the strip edge trimming device can trim and shape the edge of the strip, making the shape of the covering layer 11 on the strip surface uniform, improving the production quality of the strip, facilitating the use in subsequent production process flows, and improving the product quality. The strip roll press also has the beneficial effects of the strip edge trimming device described in any of the above solutions, which will not be elaborated here.
[0042] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.
Claims
1. Tape trimming equipment, characterized in that, For trimming and shaping the edges of the covering layer of a strip for conveying in a preset direction, the strip includes a substrate and the covering layer covering the upper surface of the substrate, and this strip edge trimming device includes: A cutting mechanism, the cutting mechanism includes a first support roller and two cutter assemblies. The two cutter assemblies are respectively arranged at both ends in the width direction of the strip. The strip is clamped between the bottom ends of the cutter assemblies and the first support roller. The gap thickness between the cutter assemblies and the upper surface of the substrate is less than the thickness of the covering layer, so that cutting lines are cut at both ends in the width direction of the covering layer; A scraping mechanism, the scraping mechanism is arranged downstream of the cutting mechanism along the conveying direction of the strip. The scraping mechanism includes a second support roller and two scraping members respectively arranged at both ends in the width direction of the strip. The strip is clamped between the bottom ends of the scraping members and the second support roller. One end of the scraping member aligns with the cutting line, and the other end extends beyond the side edges of the strip in the width direction.
2. The strip trimming device according to claim 1, wherein The cutter assembly includes a fixed bracket and a cutter body. The cutter body is slidably connected to the inner wall of the fixed bracket, so that the position of the cutter body in the height direction is adjustable. The cutter body is used for cutting the covering layer.
3. The strip trimming device according to claim 2, characterized in that, The cutter assembly further includes an adjustment bracket. The cutter body is rotatably connected to the adjustment bracket. The adjustment bracket is slidably connected to the fixed bracket. A cleaning member is arranged on the inner top wall of the adjustment bracket. The cutter body abuts against the cleaning member.
4. The strip trimming device according to claim 3, characterized in that, Either one of the connecting members of the fixed bracket and the adjustment bracket is limitedly connected with a connecting piece, and the other of the connecting members of the fixed bracket and the adjustment bracket is threadedly connected with the connecting piece.
5. The strip trimming device according to claim 4, characterized in that, An elastic member is arranged between the inner top wall of the fixed bracket and the top wall of the adjustment bracket. The connecting piece passes through the elastic member, and the elastic member is in a compressed state.
6. The strip trimming device according to claim 3, characterized in that The cleaning member is any one of a sponge pad, a wool felt, and a cotton pad, and the cleaning member is stained with silicone oil and can coat the silicone oil on the surface of the cutter body.
7. The tape trimming device according to any one of claims 1-6, characterized in that The cutting mechanism further includes an adjustment track, the adjustment track extends along the width direction of the strip, and the cutter assembly is slidably connected to the adjustment track.
8. The strip trimming device according to claim 7, wherein, The scraping mechanism further includes a scraping track, the scraping track extends along the width direction of the strip, and the scraping member is slidably connected to the scraping track.
9. The strip edge cutting device according to any one of claims 1-6, characterized in that, The scraping mechanism further includes a dust suction device, and the suction port of the dust suction device is arranged opposite to the scraping member.
10. Tape roller press, characterized in that, For producing a strip, the strip includes a substrate and a covering layer covering the upper surface of the substrate, and the strip roll press further includes the strip edge trimming device according to any one of claims 1-9.