Battery protection tape applying device

Abstract

The utility model belongs to lithium ion battery technical field, concretely relates to a battery protection adhesive tape pasting device, include: sucking disc module, sucking disc module includes the base of hard aluminium and sets up the contact sucking disc on the base, be equipped with the suction channel of intercommunication in the base, constitute negative pressure cavity, be equipped with a plurality of adsorption holes on the contact sucking disc, adsorption hole with the suction channel of base one -to -one correspondence intercommunication, pole piece pre -pressing plate, set up in pasting station, be used for before pasting tightly fixed pole piece, and, pull glue pressure piece and adhesive tape pressure piece, be used for positioning adhesive tape. The patent technical scheme passes through the structure, material and air path design of optimization sucking disc module, and introduces pole piece pre -pressing plate, effectively solved the problem that the adhesive tape pasting of prior art is easy to produce air bubble, wrinkle and leak pasting.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a battery protective tape application device. Background Technology

[0002] Currently, the mainstream tape application solutions in battery winding equipment are mainly divided into two categories: one is the tape rolling process, which achieves the application of tape to battery electrodes through rolling and bonding. The single-sheet application effect is good, but there are obvious drawbacks—low application efficiency and the need to occupy additional equipment space to add application stations, which contradicts the current battery production requirements for "high efficiency and compactness" equipment; the other is the suction cup bonding process, which uses suction cups to pick up the tape and then bond the electrodes in opposite directions. Although it has the advantages of high efficiency and small equipment space occupation, it is limited by the shortcomings of suction cup structure design, air path layout and application action control. In practical applications, tape application quality problems are prone to occur. Specifically, large air bubbles and wrinkles are generated after application, which affect the appearance and internal structural stability of the battery. In addition, there are often problems such as tape leakage and peeling off after application. It is also impossible to effectively prevent the safety hazards caused by burrs and protrusions.

[0003] In addition, both existing bonding solutions suffer from insufficient process compatibility: it is difficult to switch flexibly between tape rolling and suction cup bonding, and it cannot simultaneously meet the production needs of two-sided bonding and single-sided bonding. This results in poor equipment adaptability to different specifications and types of batteries, requiring frequent adjustments or replacements of equipment components, which further reduces production efficiency.

[0004] In summary, existing battery protection tape application technologies cannot achieve a balance between "application quality, production efficiency, equipment space utilization, and process compatibility," making it difficult to meet the current battery industry's demand for efficient, safe, and highly adaptable production equipment. There is an urgent need for a tape application device that can be integrated into winding equipment, without sacrificing efficiency, improving space utilization, and meeting the application requirements of multiple processes, in order to overcome the shortcomings of the existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a battery protection tape application device to solve the technical problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a battery protection tape application device, comprising: A suction cup module, comprising a base made of hard aluminum and a contact suction cup disposed on the base; The base has interconnected air extraction channels inside, forming a negative pressure cavity; The contact suction cup has several suction holes, and each suction hole is connected to the air extraction channel of the base. The hole diameter tolerance is ±0.05mm. The electrode pre-pressing plate is set at the bonding station to press and fix the electrode before bonding. In addition, there are tape clamping blocks and tape clamping blocks, which are used to position the tape.

[0007] Preferably, the surface of the hard aluminum base is anodized, and the hardness is ≥HV300.

[0008] Preferably, the contact suction cup is made of one of the following materials: non-marking rubber, PEEK, brominated butyl rubber, or polyurethane, with a hardness of 50-60.

[0009] Preferably, the air passage structure of the base is a top-position adsorption and air-breaking structure (3) or a center-position adsorption and air-breaking structure (4, 7).

[0010] Preferably, the adsorption surface of the contact suction cup is a plane or a micro-arc curved surface, wherein the arc degree of the micro-arc curved surface is 4° and the protrusion height is 0.2mm.

[0011] Preferably, the adsorption pores are arranged in a staggered or sequential manner.

[0012] Preferably, the adsorption pores include small-diameter adsorption pores with a diameter of 0.5mm to 1.0mm and large-diameter adsorption pores with a diameter of 1.5mm to 2.0mm. The small-diameter adsorption pores are distributed in the dynamic positioning application area, and the center-to-center distance between the pores is 1.5mm to 2.5mm. The large-diameter adsorption pores or poreless areas are distributed in the edge buffer zone.

[0013] Preferably, the ratio of the small-diameter adsorption holes to the large-diameter adsorption holes on the suction cup is 5:5, 6:4, 7:3 or 8:2.

[0014] Preferably, the electrode pre-pressing plate is integrated with or independently installed at the application station along with the suction cup module.

[0015] Preferably, the device is provided with two sets of suction cup modules, located above and below the electrode sheet respectively, forming a mating structure.

[0016] The beneficial effects of this utility model are as follows: This patented technical solution effectively solves the problems of air bubbles, wrinkles, and missed adhesion in the existing technology by optimizing the structure, material, and air path design of the suction cup module and introducing an electrode pre-pressing plate. Specifically, the use of a traceless flexible suction cup material combined with a uniformly distributed negative pressure airflow and a differentiated aperture design between the dynamic application area and the edge buffer zone significantly improves the flatness and adhesion of the tape application, reducing the defect rate of such appearance defects from 2.3% to below 0.5%, thereby greatly improving the safety and consistency of battery products.

[0017] Furthermore, the device employs a matching suction cup design, combined with precise spacing sensing and flexible control programming, to achieve efficient and synchronous application of adhesive tape on both sides of the electrode. This not only significantly improves the application speed, reduces equipment station occupancy, and optimizes the overall machine layout, but also boasts strong compatibility, allowing it to be adapted to both new and old winding equipment without large-scale modifications. While ensuring high-quality application, it simultaneously optimizes production efficiency and equipment versatility. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the air passage structure at the top of this tape application device; Figure 2 This is a schematic diagram of the central air path of the planar suction cup device. Figure 3 This is a schematic diagram of the central air path of the curved suction cup device; Figure 4 This is a schematic diagram of the auxiliary tooling; Figure 5 This is a schematic diagram of the electrode pre-pressing plate and the suction cup being attached. Numbering on the map: 1. Staggered suction cups; 2. Straight suction cups; 3. Hard aluminum top air passage; 4. Flat suction cup hard aluminum center air passage; 5. Flat suction cup device; 6. Arc-shaped suction cup device; 7. Arc-shaped suction cup hard aluminum center air passage; 8. Adhesive pressing sheet; 9. Adhesive tape pressing sheet; 10. Electrode pre-pressing plate; 11. Arc-shaped suction cup bonding scheme; 12. Electrode; 13. Adhesive tape adsorption bonding electrode; 14. Suction cup hole. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0020] Example 1: Conventional bonding method like Figure 1 and Figure 5 As shown, this embodiment provides a battery protection tape application device. The core of this device is a suction cup module, whose hard aluminum base (corresponding to...) Figure 1 The top air passage 3) has interconnected suction channels inside, forming a hollowed-out negative pressure cavity. The contact suction cup is a flat suction cup device 5, which has suction holes 14 for the parallel suction cups 2 and the staggered suction cups 1. Among them, the diameter of the hole in the dynamic positioning application area is φ0.8mm, and the center distance of the hole is 2.0mm; the diameter of the hole in the edge buffer zone area is φ1.8mm.

[0021] During operation, the adhesive tape is first stretched and positioned by the tape-pulling block 8 and the tape-pressing block 9. Then, two identical flat suction cup devices 5, driven by the drive mechanism, move to the upper and lower positions respectively above and below the electrode 12. At this point, the electrode pre-pressing plate 10 activates first, pressing and fixing the electrode 12. Next, the upper and lower suction cup devices 5 move towards each other. When their built-in spacing sensors detect a distance ≤1mm between them, the drive mechanism switches to a flexible deceleration mode and slowly presses down, ultimately applying the adhesive tape smoothly (corresponding to application effect 13) onto the surface of the electrode 12. After application, the negative pressure inside the suction cups is released, the suction cup devices 5 reset, and the electrode pre-pressing plate 10 opens, completing one application cycle.

[0022] Example 2: Swinging Adhesion Method This embodiment optimizes the suction cup structure and application action based on Embodiment 1. For example... Figure 3 and Figure 5 As shown, the suction cup module used in this embodiment is an arc-shaped suction cup device 6, whose base adopts a central position adsorption and air breaking design (corresponding to the arc-shaped suction cup hard aluminum central air passage 7).

[0023] The application process is similar to that of Example 1, except for the application action: when the upper and lower arc-shaped suction cup devices 6 flexibly slow down to a spacing of ≤1mm and press down for application, the suction cups are not pressed vertically. Instead, driven by the control program, they simultaneously rotate slightly to the left to complete the arc-shaped suction cup alignment scheme 11. Subsequently, the negative pressure is released, the suction cups reset, and rotate to the right to their initial position. This oscillating action helps to further release the internal stress of the tape.

[0024] Example 3: Unilateral swinging application method This embodiment demonstrates another application strategy. For example... Figure 2 , Figure 3 and Figure 5 As shown, this device includes two suction cup modules, but only the upper arc-shaped suction cup device 6 adsorbs the tape, while the lower flat suction cup device 5 does not adsorb the tape.

[0025] During operation, the electrode pre-pressing plate 10 first presses the electrode 12 firmly. Then, the lower, tape-free flat suction cup device 5 moves first, gently slowing down until its surface is in horizontal contact with the upper surface of the electrode 12 and applies a slight suction force. Next, the upper, tape-laden arc-shaped suction cup device 6 moves, gently slowing down and pressing down to contact the lower suction cup device 5. Through oscillation or direct pressing, the tape is transferred to the surface of the electrode 12.

[0026] The scope of protection of this utility model is not limited to the above embodiments. For example, the air passage of the hard aluminum base can be designed with top-position adsorption to absorb air leaks (…). Figure 1 3) or the central position adsorbs the broken gas ( Figure 2 4 in Figure 3(7) The arrangement ratio of the adsorption holes can be adjusted between 6:4 and 8:2; the electrode pre-pressing plate 10 can also be designed as an integrated structure with the suction cup device. Any non-substantial modifications and substitutions made to this utility model using its concept should be covered within the protection scope of this utility model.

[0027] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A battery protection tape application device, characterized in that, include: A suction cup module, comprising a base made of hard aluminum and a contact suction cup disposed on the base; The base has interconnected air extraction channels inside, forming a negative pressure cavity; The contact suction cup is provided with a plurality of suction holes (14), and the suction holes (14) are connected to the air extraction channels of the base one by one. An electrode pre-pressing plate (10) is set at the bonding station to press and fix the electrode (12) before bonding. In addition, there are adhesive tape clamping blocks (8) and tape clamping blocks (9) used to position the tape.

2. The battery protection tape application device according to claim 1, characterized in that, The surface of the hard aluminum base is anodized, and its hardness is ≥HV300.

3. The battery protection tape application device according to claim 1, characterized in that, The contact suction cup is made of one of the following materials: non-marking rubber, PEEK, brominated butyl rubber, or polyurethane, with a hardness of 50-60.

4. The battery protection tape application device according to claim 1, characterized in that, The air passage structure of the base is a top-position adsorption and air-breaking structure (3) or a center-position adsorption and air-breaking structure (4, 7).

5. The battery protection tape application device according to claim 1, characterized in that, The suction surface of the contact suction cup is a flat surface or a micro-arc curved surface, wherein the arc degree of the micro-arc curved surface is 4° and the protrusion height is 0.2mm.

6. The battery protection tape application device according to claim 1, characterized in that, The adsorption pores (14) are arranged in a staggered (1) or sequential (2) manner.

7. The battery protection tape application device according to claim 1, characterized in that, The adsorption holes (14) include small-diameter adsorption holes with a diameter of 0.5 mm to 1.0 mm and large-diameter adsorption holes with a diameter of 1.5 mm to 2.0 mm. The small-diameter adsorption holes are distributed in the dynamic positioning application area, and the center-to-center distance between the holes is 1.5 mm to 2.5 mm. The large-diameter adsorption holes or the non-porous area are distributed in the edge buffer zone.

8. The battery protection tape application device according to claim 7, characterized in that, The ratio of small-diameter adsorption holes to large-diameter adsorption holes on the suction cup is 5:5, 6:4, 7:3 or 8:

2.

9. The battery protection tape application device according to claim 1, characterized in that, The electrode pre-pressing plate (10) is integrated with the suction cup module or installed independently at the application station.

10. The battery protective tape application device according to any one of claims 1 to 9, characterized in that, The device is equipped with two sets of suction cup modules, located above and below the electrode (12) respectively, forming a mating structure.

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