Universal coating gasket for lithium ion battery and sodium ion battery
By designing an asymmetrical inclined structure with a left-side guide block, a middle raised guide column, and a right-side guide block on the coating pad, the problem of uneven feeding pressure in the coating pad was solved, achieving high-precision coating effect for lithium-ion and sodium-ion batteries and improving the consistency of the electrochemical performance of the electrode.
Patent Information
- Application Number
- CN202522188538.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-10-16
AI Technical Summary
Existing coating pads are difficult to effectively balance the greater central feed pressure than the sides, making it difficult to control the alignment and areal density uniformity of the zebra coating on the entire electrode. Traditional structures cannot accurately control material flow, affecting electrode performance.
An asymmetrical inclined surface design consisting of a left-side guide block, a middle raised guide column, and a right-side guide block is adopted. Through integrated processing and molding, the angle and height tolerance of the inclined surface are precisely controlled to construct a middle pressure dispersion zone and two side pressure transition zones, thereby achieving uniform distribution of slurry.
It achieves uniform coating density and stable edge thickness, meets the high-precision alignment requirements of all-electrode zebra coating, simplifies the production process, and improves the stability of equipment integration.
Smart Images
Figure CN223602772U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of coating gasket, specifically relates to a lithium ion battery and sodium ion battery general type coating gasket. BACKGROUND
[0002] The existing coating gasket depends on simple chamfer, symmetrical small angle design, and it is difficult to effectively balance the problem that the middle feeding pressure is greater than that of the two sides, especially after the alignment degree and the uniformity of the surface density are improved for the full tab zebra coating, the traditional structure cannot accurately control the material flow, and although the misaligned coating can partially alleviate the problem, when adapting to the full tab, the alignment degree is easy to lose control and affect the performance of the pole piece. SUMMARY
[0003] Therefore, the utility model provides a lithium ion battery and sodium ion battery general type coating gasket to overcome the problems in the prior art.
[0004] The utility model discloses a technical scheme as follows:
[0005] A lithium ion battery and sodium ion battery general type coating gasket, comprising a coating gasket base body, at least one group of single coating units is arranged on the coating gasket base body, the single coating unit is composed of a left flow guide block, a middle protruding flow guide column and a right flow guide block, the overall structure is symmetrically distributed, and the left side and the right side in the single coating unit are designed as asymmetric inclined surfaces.
[0006] Preferably, the left flow guide block and the right flow guide block are provided with asymmetric inclined flow guide surfaces.
[0007] Preferably, the middle protruding flow guide column is of a protruding structure.
[0008] Preferably, the inclined surface of the left flow guide block and the inclined surface of the right flow guide block are arranged at an angle difference, and the inclination angles of the inclined surfaces on the two sides are controlled within a range of ±0.1°, and the height tolerance of the inclined surfaces is controlled within a range of ±0.01mm.
[0009] Preferably, the coating gasket base body, the left flow guide block, the middle protruding flow guide column and the right flow guide block are integrally processed and formed.
[0010] The utility model has the advantages that through the cooperation of the left and right asymmetric inclined flow guide blocks and the middle protruding flow guide column, the middle pressure dispersion area and the two-side inclined surface pressure guiding area are constructed, the middle feeding high pressure is effectively decomposed, the pressure difference influence of the two sides is reduced, the coating surface density uniformity is ensured, the edge thickness control is more stable, the alignment requirement of the full tab zebra coating is met, the asymmetric inclined flow guide design can meet the high-precision alignment requirement without relying on misaligned coating, the production process adaptability is simplified, the size precision and the structure synergy are ensured by the integrally formed structure, the equipment integration stability is improved, and the error risk caused by the structure splicing is reduced. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the structure described in this utility model.
[0013] In the diagram: 1. Coated pad substrate; 2. Left guide block; 3. Middle raised guide column; 4. Right guide block. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figure 1 As shown, a universal coating pad for lithium-ion batteries and sodium-ion batteries includes a coating pad substrate 1, on which at least one set of single coating units are provided; a single coating unit consists of a left guide block 2, a middle protruding guide column 3 and a right guide block 4, and the overall structure is symmetrically distributed. The left and right sides of the single coating unit are designed with asymmetrical inclined guide surfaces to balance the feed pressure difference and control the uniformity of material coating.
[0016] The left guide block 2 and the right guide block 4 are provided with asymmetrical inclined guide surfaces. The inclined structure changes the material flow direction and pressure distribution, which is suitable for the alignment and surface density uniformity requirements of the all-electrode zebra coating process, and eliminates the need for misaligned coating.
[0017] The central raised guide column 3 is a raised structure that works in conjunction with the left guide block 2 and the right guide block 4 to create a central pressure concentration zone and a pressure transition zone on both sides of the slope, guiding the material to spread stably.
[0018] The inclined surface of the left guide block 2 and the inclined surface of the right guide block 4 are set at an angle difference, and the inclination angle tolerance of both inclined surfaces is controlled within ±0.1°, and the height tolerance of the inclined surfaces is controlled within ±0.01mm, so as to ensure the accuracy of pressure regulation and flow guidance.
[0019] The coating gasket base 1, the left side flow guide block 2, the middle protruding flow guide column 3 and the right side flow guide block 4 are integrally processed and formed, and can be prepared by using a precision milling or an electric spark machining process, so that the structural cooperation and the size precision are ensured.
[0020] Actual working process:
[0021] When the lithium and sodium ion battery pole piece coating operation is performed, the coating slurry flows into the coating cavity surrounded by the left side flow guide block 1 of the coating gasket base from the equipment feeding end, and due to the pressure concentration characteristics of the feeding port, the initial pressure in the middle region is higher than that on both sides.
[0022] When the slurry contacts the left side flow guide block 3 of the middle protruding flow guide column, the protruding structure breaks the pressure concentration state, disperses and guides the slurry in the high pressure area to the left and right sides, and builds the pressure gradient from the middle high pressure dispersion area of the left side flow guide block to the side flow guide block of the pressure transition area on both sides, so that the uneven coating area density caused by a single high pressure area is avoided.
[0023] The dispersed slurry flows into the left side flow guide block 2 and the right side flow guide block 4, and the asymmetric slope design (the slope structure left side flow guide block including an angle difference and a precise tolerance) of the two further balances the pressure difference on both sides by changing the slurry flow path and speed.
[0024] The slope of the left side flow guide block 2 is guided by the inclination angle and the height tolerance control, and the slurry is stably spread to the left side area of the pole piece to compensate for the influence of the initial pressure difference.
[0025] The slope of the right side flow guide block 4 is a symmetric structure with an angle difference, which synchronously controls the uniform distribution of the slurry to the right side area of the pole piece, so that the coating area density on both sides is consistent.
[0026] The full tab zebra coating has high requirements for alignment, the pressure dispersion of the middle protruding flow guide column left side flow guide block 3, the path control of the left side flow guide block 2 and the right side flow guide block 4, the slurry spreading on the pole piece, avoiding the thick edge and drum edge defects, and without offset coating, the full tab alignment requirement can be met, and finally the high-precision coating effect of uniform area density and stable edge thickness is realized, which provides protection for the consistency of the electrochemical performance of the battery pole piece.
[0027] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A coated gasket for lithium-ion and sodium-ion batteries, characterized by, The application relates to a coating gasket base (1) provided with at least one group of single coating units; the single coating unit is composed of a left guide block (2), a middle protruding guide column (3) and a right guide block (4), the overall structure is symmetrically distributed, and the left side and the right side of the single coating unit are asymmetrically designed as inclined surfaces.
2. The universal coated gasket for lithium-ion and sodium-ion batteries of claim 1, wherein: The left guide block (2) and the right guide block (4) are provided with asymmetric inclined surfaces.
3. The universal coated gasket for lithium-ion and sodium-ion batteries of claim 1, wherein: The middle protruding guide column (3) is of a protruding structure.
4. The universal coated gasket for lithium-ion and sodium-ion batteries of claim 1, wherein: The inclined surface of the left guide block (2) and the inclined surface of the right guide block (4) are arranged with an angle difference, the inclination angle tolerance of the two inclined surfaces is controlled within the range of + / -0.1 DEG, and the height tolerance of the inclined surfaces is controlled within the range of + / -0.01 mm.
5. The universal coated gasket for lithium-ion and sodium-ion batteries of claim 1, wherein: The coating gasket base (1), the left guide block (2), the middle protruding guide column (3) and the right guide block (4) are integrally processed and formed.