Die cutting and embossing two-in-one cutting board die structure for die cutting of battery cell pole piece and die cutting equipment
By setting an embossing structure inside the die-cutting die of the die-cutting equipment, the problem of curling of the battery cell electrode sheets after die-cutting is solved, achieving efficient production and cost savings.
Patent Information
- Application Number
- CN202423262241.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing battery cell electrode die-cutting equipment is prone to curling when die-cutting single-sided coated electrodes, leading to increased subsequent processes and wasted costs.
The die-cutting and embossing process is combined into a single die-cutting and embossing structure. By setting an embossing structure within the closed structure formed by the die-cutting blade, patterns are simultaneously pressed onto the electrode surface during die-cutting to improve the anti-curling strength.
This significantly reduces the curling degree of the electrode sheet after die-cutting, and simultaneously completes the die-cutting and flattening pre-treatment, saving process time and reducing equipment and labor costs.
Smart Images
Figure CN223820686U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of the die cutting equipment of the battery cell pole piece, concretely relates to a die cutting of the die cutting embossing two unification's battery cell pole piece die cutting cutter plate die structure and die cutting equipment. BACKGROUND
[0002] When the lithium battery is processed, the process of die cutting of the battery cell pole piece is involved, the die cutting process of the battery cell pole piece is mainly completed through the die cutting knife, when the single surface coated pole piece is die cut, the battery cell pole piece is affected by the surface tension and will naturally curl to the non-coated surface, which can easily lead to the inability of the laminating machine to identify the curled battery cell pole piece, so it is necessary to add a process of flattening the single surface pole piece after the die cutting process, which leads to the increase of the process time and the waste of equipment cost and labor cost.
[0003] At present, most of the existing battery pole piece die cutting mechanisms do not have the design of avoiding the curling of the battery cell pole piece, for example, the attached Figure 1 For the existing conventional die cutting structure of the battery cell pole piece, it includes a bottom plate and a die cutting blade installed on the bottom plate, and the die cutting structure is more serious after cutting the single surface coated battery cell pole piece, which has the processing limitation.
[0004] Based on the above, the structure of the existing die cutting knife of the battery cell pole piece is improved, and a die cutting embossing two unification's die cutting of the battery cell pole piece cutter plate die structure and die cutting equipment are provided to solve the above problems. SUMMARY
[0005] The utility model discloses a kind of die cutting embossing two unification's die cutting of the battery cell pole piece cutter plate die structure and die cutting equipment, prevent the curling of battery cell pole piece after die cutting, process can be simplified, cost is saved.
[0006] To achieve the above object, the utility model adopts the following technical scheme:
[0007] (I) the utility model provides a kind of die cutting embossing two unification's die cutting of the battery cell pole piece cutter plate die structure, including bottom plate and the die cutting mechanism being installed on bottom plate, the die cutting mechanism includes at least one die cutting unit, the die cutting unit is by die cutting blade ring distribution and is enclosed structure, and the shape of the enclosed structure surrounded by die cutting blade is consistent with the shape of the battery cell pole piece to be die cut;Die cutting unit is provided with embossing structure, and embossing structure is fixedly connected with bottom plate, and the height of embossing structure is less than the height of die cutting blade.
[0008] As a further optimization of the utility model, it also has the following features: the embossing structure includes a plurality of embossing blocks, the surface of the embossing block is a regular pattern or an irregular pattern, and the plurality of embossing blocks are evenly distributed or unevenly distributed.
[0009] As further optimization of the utility model, it also has the features that the surface pattern shape of the embossing block is one or more than one of the following: a net pattern, parallel lines, a circle, an ellipse, a triangle, a quadrilateral, a polygon, a sector, a heart shape, a water drop shape, and randomly distributed convex points.
[0010] As further optimization of the utility model, it also has the features that the embossing structure includes a plurality of cuboid embossing blocks, and each cuboid embossing block is parallel to each other; the cuboid embossing block is provided with a pattern on the surface of the side close to the to-be-cut battery cell pole piece; the cuboid embossing block is horizontally, vertically or obliquely distributed on the bottom plate.
[0011] As further optimization of the utility model, it also has the features that the embossing structure includes a plurality of groups of cylindrical embossing blocks, and the plurality of groups of cylindrical embossing blocks are uniformly distributed; the cylindrical embossing block is provided with a pattern on the surface of the side close to the to-be-cut battery cell pole piece.
[0012] As further optimization of the utility model, it also has the features that the die-cutting blade is perpendicular to the surface of the bottom plate; the side of the die-cutting blade facing the bottom plate is embedded in the bottom plate, and the side of the blade away from the bottom plate is a blade edge.
[0013] As further optimization of the utility model, it also has the features that the die-cutting mechanism includes a plurality of groups of die-cutting units, and the plurality of groups of die-cutting units are arrayed on the bottom plate.
[0014] As further optimization of the utility model, it also has the features that the die-cutting unit further includes a tab cutting blade; the tab cutting blade is fixed on the bottom plate, and the tab cutting blade is distributed at one end of the die-cutting blade, and the tab cutting blade and the die-cutting blade form a closed structure; the cross section of the tab cutting blade is circular, rectangular or trapezoidal.
[0015] As further optimization of the utility model, it also has the features that the die-cutting blade is a steel blade, and the bottom plate is a wooden plate, an acrylic plate or a plywood.
[0016] As further optimization of the utility model, it also has the features that the die-cutting unit is a closed structure of a ring-shaped distribution formed by bending a group of die-cutting blades, or the die-cutting unit is a closed structure of a ring-shaped distribution formed by welding a plurality of groups of die-cutting blades.
[0017] (II) The utility model also provides a die-cutting and embossing two-in-one battery cell pole piece die-cutting equipment which comprises the die plate die structure.
[0018] The utility model has the advantages of:
[0019] This invention features an embossing structure within a closed structure formed by die-cutting blades, which is then fixed to a base plate. As the base plate descends, the die-cutting blades cut off the single-sided coated electrode sheet while simultaneously pressing patterns onto its surface, thereby enhancing the anti-curling strength of the uncoated side of the single-sided electrode sheet. This significantly reduces the curvature of the electrode sheet during die-cutting. This structure allows for simultaneous die-cutting and flattening of the single-sided electrode sheet, saving time, improving production efficiency, and reducing equipment and labor costs. Attached image description:
[0020] Figure 1 This is a schematic diagram of the existing conventional battery cell electrode die-cutting structure;
[0021] Figure 2 This is a schematic diagram of the die-cutting plate structure for die-cutting battery cell electrodes according to an embodiment of this utility model;
[0022] The labels in the attached diagram are:
[0023] 1. Base plate; 2. Die-cutting unit; 3. Embossed structure. Detailed implementation method:
[0024] 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 embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0025] Example 1
[0026] Reference Figure 2 This utility model embodiment provides a die-cutting and embossing combined die-cutting and die-cutting structure for battery cell electrode sheets, including a base plate 1 and a die-cutting mechanism mounted on the base plate 1. The die-cutting mechanism includes two die-cutting units 2. Each die-cutting unit 2 is a closed structure formed by circumferentially distributed die-cutting blades. More specifically, each die-cutting unit is a circumferentially distributed closed structure formed by bending a set of die-cutting blades, or it is a circumferentially distributed closed structure formed by welding multiple sets of die-cutting blades. The shape of the closed structure formed by the die-cutting blades is consistent with the shape of the battery cell electrode sheet to be die-cut.
[0027] In other embodiments of this utility model, the die-cutting mechanism can be configured as two or more die-cutting units 2 with the same shape and specifications and distributed in an array, or as two or more die-cutting units 2 with different shapes and specifications, which can simultaneously perform die-cutting of multiple battery cell electrode sheets with the same or different shapes and specifications, thereby improving die-cutting efficiency.
[0028] The embossing structure 3 is fixedly connected with the bottom plate 1, and the height of the embossing structure 3 is slightly smaller than the height of the die-cutting blade 2. The embossing structure 3 comprises a plurality of embossing blocks, the surface of the embossing block is in a regular pattern or an irregular pattern, the plurality of embossing blocks are uniformly distributed or non-uniformly distributed, and the surface pattern of the embossing block is one or more than one of a net pattern, a parallel line, a circle, an ellipse, a triangle, a quadrilateral, a polygon, a sector, a heart shape, a water drop shape and a randomly distributed convex point. That is, any shape of the embossing block capable of pressing a pattern on the surface of the pole piece to improve the anti-curling strength of the pole piece belongs to the protection scope of the utility model.
[0029] As shown in Figure 2 Preferably, the embossing structure 3 comprises a plurality of cuboid embossing blocks, and each cuboid embossing block is parallel to each other, the cuboid embossing blocks are distributed in an inclined manner on the bottom plate 1 (may also be distributed in a horizontal manner or a vertical manner), and the side surface of the cuboid embossing block close to the to-be-die-cut battery cell pole piece is provided with a regular (or irregular) pattern. In other embodiments of the utility model, the embossing structure 3 can also be provided as comprising a plurality of groups of cylindrical embossing blocks, and the plurality of groups of cylindrical embossing blocks are uniformly distributed, and the side surface of the cylindrical embossing block close to the to-be-die-cut battery cell pole piece is provided with a regular (or irregular) pattern.
[0030] As shown in Figure 2 The die-cutting blade is perpendicular to the surface of the bottom plate 1, the side of the die-cutting blade close to the bottom plate 1 is embedded in the bottom plate 1, and the side of the blade away from the bottom plate 1 is a blade edge, which is used for die-cutting of the battery cell pole piece.
[0031] In the embodiment, the die-cutting blade is a steel blade, and the bottom plate 1 is a wooden plate, an acrylic plate or a plywood.
[0032] In the embodiment, the embossing block 3 and the die-cutting unit 2 are integrated and spliced on the surface of the bottom plate 1, the die-cutting blade forms a closed area after being installed on the surface of the bottom plate 1, and the blade can cut the pole piece with a corresponding shape when the bottom plate goes down during die-cutting, and the embossing block 3 can press a pattern on the surface of the pole piece, thereby improving the anti-curling strength of the single-sided pole piece without a coating. The single-sided pole piece die-cut by the traditional die-cutting blade plate will naturally have a serious curling problem. Compared with the traditional die-cutting structure, the structure can simultaneously perform die-cutting and flattening pretreatment of the single-sided pole piece, saves process time, improves production efficiency and reduces equipment and labor costs.
[0033] Embodiment 2
[0034] The die-cutting and embossing two-in-one battery cell pole piece die-cutting blade plate structure of the embodiment is basically the same as that disclosed in the embodiment 1, and the difference lies in that the embodiment further comprises a tab cutting blade and a foam layer.
[0035] In the embodiment, the die cutting unit 2 further comprises tab cutting blades for die cutting of the electrode tab, the tab cutting blades are fixed on the bottom plate 1, and the tab cutting blades are distributed at one end of the die cutting blades, and the tab cutting blades and the die cutting blades form a closed structure. The cross section of the tab cutting blade is rectangular (may also be circular, trapezoidal or other shapes).
[0036] In the embodiment, the side surface of the bottom plate 1 towards the die cutting unit 2 is provided with a foam layer, the foam layer is bonded on the bottom plate 1, and the tab cutting blades, the die cutting blades and the embossing blocks are exposed outside the foam layer. The design of the foam layer can facilitate the demolding of the electrode tab after die cutting.
[0037] Embodiment 3
[0038] The electrode tab die cutting device of the die cutting and embossing two-in-one in the embodiment comprises a working platform, an electrode tab conveying mechanism and the die cutting and embossing two-in-one electrode tab die cutting die plate structure disclosed in the embodiment 1, and the die plate structure is horizontally distributed directly above the working platform.
[0039] The electrode tab material to be die cut is conveyed to the working platform by the conveying mechanism, the die plate structure moves downward for die cutting operation, and the die cut electrode tab is removed by the electrode tab conveying mechanism for the next process.
[0040] The die cutting blade forms a closed structure, and the embossing structure is fixed on the bottom plate. After the bottom plate goes down, the die cutting blade can cut the single-sided coated electrode tab while pressing the pattern on the surface of the tab, thereby improving the anti-curling strength of the single-sided tab without coating. The curling degree of the tab is greatly reduced when the die cutting is completed. The structure can simultaneously perform die cutting and flattening pretreatment of the single-sided tab, save process time, improve production efficiency, and reduce equipment and labor costs.
[0041] The above is only the preferred embodiment of the utility model, the protection scope of the utility model is not only limited to the above-mentioned embodiments, and all technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can be considered as the protection scope of the utility model.
Claims
1. A die-cutting and embossing combined die-cutting and die-cutting structure for battery cell electrode sheets, comprising a base plate (1) and a die-cutting mechanism mounted on the base plate (1), characterized in that, The die-cutting mechanism includes at least one die-cutting unit (2), which is a closed structure formed by circumferentially distributed die-cutting blades, and the shape of the closed structure formed by the die-cutting blades is consistent with the shape of the battery cell electrode sheet. The die-cutting unit (2) is provided with an embossing structure (3), which is fixedly connected to the base plate (1). The height of the embossing structure (3) is less than the height of the die-cutting blade.
2. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 1, characterized in that, The embossed structure (3) includes several embossed blocks, the surface of which is a regular or irregular pattern; the several embossed blocks are evenly or non-uniformly distributed.
3. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 2, characterized in that, The surface pattern of the embossed block is one or more of the following: mesh, parallel lines, circle, ellipse, polygon, fan shape, heart shape, teardrop shape, and randomly distributed protrusions.
4. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 2, characterized in that, The embossed structure (3) includes several cuboid embossed blocks, and each cuboid embossed block is parallel to the others; The rectangular embossed block has a pattern on the surface of the side of the battery cell electrode sheet closest to the die-cutting sheet. The rectangular embossed blocks are distributed horizontally, vertically, or obliquely on the base plate (1).
5. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 2, characterized in that, The embossed structure (3) includes several sets of cylindrical embossed blocks, and the several sets of cylindrical embossed blocks are evenly distributed. The cylindrical embossed block has a pattern on the surface of the side of the electrode sheet to be die-cut.
6. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 1, characterized in that, The die-cutting blade is perpendicular to the surface of the base plate (1); The die-cutting blade is embedded in the base plate (1) on the side facing the base plate (1), and the side of the blade away from the base plate (1) is the cutting edge.
7. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 1, characterized in that, The die-cutting mechanism includes multiple sets of die-cutting units (2), and the multiple sets of die-cutting units (2) are arrayed on the base plate (1).
8. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 1, characterized in that, The die-cutting unit (2) also includes a tab cutting blade; The electrode cutting blade is fixed on the base plate (1), and the electrode cutting blade is distributed at one end of the die-cutting blade. The electrode cutting blade and the die-cutting blade form a closed structure. The cross-section of the electrode cutting blade is circular, rectangular or trapezoidal.
9. The die-cutting and embossing combined die-cutting and die-making structure for battery cell electrode sheets according to claim 1, characterized in that, The die-cutting blade is made of steel, and the base plate (1) is made of wood, acrylic or plywood.
10. A die-cutting and embossing combined die-cutting and embossing equipment for battery cell electrodes, characterized in that, The die-cutting equipment includes the die-cutting structure as described in any one of claims 1 to 9.