A quick assembly structure of a battery package

Abstract

The application relates to the technical field of battery packaging, in particular to a wrapped battery quick assembly structure which comprises a battery body and a composite wrapping layer, the upper and lower surfaces of the battery body are attached with aluminum-plastic films, the composite wrapping layer comprises an aluminum foil layer, a double-sided adhesive tape layer and an electrolytic adhesive tape layer, the double-sided adhesive tape layer comprises a first release layer, a viscous adhesive layer and a second release layer, the first release layer, the aluminum foil layer, the viscous adhesive layer, the electrolytic adhesive tape layer and the second release layer are sequentially stacked from top to bottom, after the second release layer is removed, the electrolytic adhesive tape layer and the double-sided adhesive tape layer are combined to form an electrolytic viscous wrapping integrated structure, a traditional secondary assembly process is optimized to one-time viscous fixing, the electrolytic adhesive tape layer is viscously fixed to the upper surface of the battery body, and the application has the characteristics of improving production efficiency.

Description

Technical Field

[0001] This application relates to the field of battery packaging technology, and in particular to a rapid assembly structure for encapsulating batteries. Background Technology

[0002] In product applications, encapsulated batteries possess excellent safety performance, passing nail penetration and high-temperature thermal runaway tests, and can operate stably under various conditions. They are widely used in wearable electronic devices, the automotive industry, and medical devices.

[0003] In related technologies, batteries are often encapsulated using easy-tear stickers for structural sealing, which facilitates safe removal. However, this method offers poor protection, and removing the stickers may cause short circuits or malfunctions in the battery. Currently, the industry commonly uses a combination of electrolytic double-sided adhesive and wrapping tape to perform double-layer encapsulation of such batteries, replacing the original easy-tear stickers. The electrolytic adhesive can rapidly reduce its stickiness within 10-20 seconds after applying a low voltage, achieving non-destructive separation.

[0004] The existing battery assembly process has the following problems: the electrolytic adhesive tape and the wrapping tape are stacked together, requiring two assembly processes before and after production, which is inefficient. Utility Model Content

[0005] To improve production efficiency, this application provides a rapid assembly structure for encapsulated batteries.

[0006] The rapid assembly structure for encapsulated batteries provided in this application adopts the following technical solution: A quick-assembly structure for a battery includes a battery body and a composite wrapping layer. The upper and lower surfaces of the battery body are covered with aluminum-plastic film. The composite wrapping layer includes an aluminum foil layer, a double-sided adhesive layer, and an electrolytic tape layer. The double-sided adhesive layer includes a first release layer, an adhesive layer, and a second release layer. The first release layer, the aluminum foil layer, the adhesive layer, the electrolytic tape layer, and the second release layer are stacked sequentially from top to bottom. After the second release layer is removed, the electrolytic tape layer is bonded and fixed to the upper surface of the battery body.

[0007] By adopting the above technical solution, the electrolytic tape layer and the double-sided adhesive layer are combined to form an integrated electrolytic adhesive full-wrap structure, which optimizes the traditional secondary assembly process into a one-time bonding and fixing, effectively improving production efficiency.

[0008] Preferably, the area of ​​the adhesive layer is larger than that of the battery body, and it is disposed on the upper surface of the battery body.

[0009] By adopting the above technical solutions, area redundancy is achieved, reducing the precision requirements of equipment in automated production lines.

[0010] Preferably, the edge of the adhesive layer extending out of the battery body is provided with inwardly folded side wing sealing flanges and tail wing sealing flanges corresponding to the two sides and the bottom of the battery body, respectively. The side wing sealing flanges and the tail wing sealing flanges are folded inward and then bonded and fixed to the lower surface of the battery body.

[0011] By adopting the above technical solution, a complete encapsulation seal is achieved, reducing the occurrence of leakage of moisture, oxygen, and electrolyte.

[0012] Preferably, the connection between the two side wing sealing flanges and the tail wing sealing flange is provided with an inwardly recessed notch.

[0013] By adopting the above technical solution, the notch design allows each sealing edge to form a smooth transition when bent at 90°, reducing material wrinkles.

[0014] Preferably, the corner of the side wing sealing flange is designed with a rounded arc shape.

[0015] By adopting the above technical solution, alignment is easier during folding, reducing the difficulty of operation.

[0016] Preferably, the adhesive layer is PI adhesive.

[0017] By adopting the above technical solution, the flame retardancy and puncture resistance of the battery body are improved.

[0018] Preferably, the first release layer is transparent and the second release layer is blue.

[0019] By adopting the above technical solution, different functional layers can be distinguished by color, thereby reducing the error rate of operation.

[0020] Preferably, the electrolytic adhesive tape layer achieves a decrease in adhesive strength through at least one of the following mechanisms: redox reaction of metal ions, formation of microbubbles from electrolytically generated gas, polymer polar rearrangement, and chemical bond breaking or self-degradation.

[0021] By adopting the above technical solutions, the stickers are more stable and reliable than easy-to-tear stickers, and the materials are cheaper, more environmentally friendly, and easier to recycle without damage.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The electrolytic tape layer and the double-sided adhesive layer are combined to form an electrolytic adhesive fully encapsulated integrated structure, which optimizes the traditional two-stage assembly process into a one-time bonding and fixing, effectively improving production efficiency; 2. This creates area redundancy, reducing the precision requirements of equipment in automated production lines; 3. Achieving a complete encapsulated seal reduces the possibility of leakage of moisture, oxygen, and electrolyte. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the exploded structure of the composite coating layer in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Battery body; 11. Aluminum-plastic film; 2. Composite wrapping layer; 21. Aluminum foil layer; 22. Double-sided adhesive layer; 221. First release layer; 222. Adhesive layer; 223. Second release layer; 23. Electrolytic tape layer; 24. Side wing sealing fold; 25. Tail wing sealing fold; 251. Notch. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0027] This application discloses a rapid assembly structure for a battery pack. (Refer to...) Figure 1-2 A quick assembly structure for a battery includes a battery body 1 and a composite wrapping layer 2. The upper and lower surfaces of the battery body 1 are covered with an aluminum-plastic film 11. The composite wrapping layer 2 includes an aluminum foil layer 21, a double-sided adhesive layer 22, and an electrolytic tape layer 23. The double-sided adhesive layer 22 includes a first release layer 221, an adhesive layer 222, and a second release layer 223. The first release layer 221, the aluminum foil layer 21, the adhesive layer 222, the electrolytic tape layer 23, and the second release layer 223 are stacked sequentially from top to bottom. After the second release layer 223 is removed, the electrolytic tape layer 23 is bonded and fixed to the upper surface of the battery body 1.

[0028] Correspondingly, the aluminum-plastic film 11 wraps the battery body 1, which initially enhances the battery's sealing and corrosion resistance. The tin foil layer is used to provide electromagnetic shielding and physical protection. The electrolytic tape layer 23 has strong adhesion under normal conditions. When a certain current or voltage is applied to it, the Faraday effect will occur under the action of the electric field. The ions on the positive and negative electrode surfaces destroy the original adhesion formed by van der Waals forces, achieving rapid de-adhesion and non-destructive separation, which is more stable and reliable than easy-to-tear stickers.

[0029] Therefore, this structural design combines electrolytic tape layer 23 and double-sided adhesive layer 22 to form an integrated electrolytic adhesive full-wrap structure, which can be easily disassembled during maintenance. The materials are environmentally friendly and have excellent adhesive strength, reducing material waste and saving costs. At the same time, the traditional secondary assembly process is optimized into a one-time adhesive fixation, effectively improving production efficiency.

[0030] Specifically, the adhesive layer 222 has an area larger than the battery body 1 and covers the upper surface of the battery body 1. The edge of the adhesive layer 222 extending out of the battery body 1 is provided with inwardly folded side wing sealing folds 24 and tail wing sealing folds 25 on the sides and bottom of the battery body 1, respectively. The side wing sealing folds 24 and tail wing sealing folds 25 are folded inward and then bonded and fixed to the lower surface of the battery body 1.

[0031] Therefore, the adhesive layer 222, together with three sealing folds, achieves a complete encapsulation seal, effectively reducing the leakage of moisture, oxygen, and electrolyte. The fold design assists in the mechanical locking of the adhesive layer 222 to the battery body 1. Even if the adhesive layer 222 ages or is subjected to external impact, it can still provide additional fixation, reducing the risk of delamination or detachment. At the same time, the large-size adhesive layer 222 creates area redundancy, reducing the precision requirements of equipment in automated production lines.

[0032] Furthermore, an inwardly recessed notch 251 is provided at the connection between the two side wing sealing folds 24 and the tail wing sealing fold 25. This notch 251 is designed as a visual or tactile marker to provide a clear positioning reference when the folds are folded, ensuring that the side folds and the tail wing fold are precisely aligned, reducing the occurrence of poor sealing due to misalignment, and allowing each sealing fold to form a smooth transition when bent at 90°, guiding the material to deform evenly along the direction of the notch 251, reducing material wrinkles, bending or uneven thickness caused by folding stress, especially suitable for thinner adhesive layers 222.

[0033] Meanwhile, the corners of the side sealing folds 24 are designed with rounded arcs, making them easier to align during folding, reducing operational difficulty, and making them suitable for automated production. They also indirectly extend battery life by dispersing mechanical stress and eliminating material fatigue or fracture caused by stress concentration at right angles.

[0034] Furthermore, the rounded corners eliminate right-angle gaps, reduce the risk of dust accumulation through a smooth transition, and further enhance dustproof and waterproof performance, reducing the risk of electrolyte leakage or external contaminant intrusion. When the rounded corners contact the lower surface of the battery body 1, they form a larger bonding area, increasing adhesion and improving long-term anti-peel strength.

[0035] In the process described above, the adhesive layer 222 is made of PI adhesive, which has excellent high temperature resistance, electrochemical stability, strong mechanical toughness and sealing reliability. This ensures the flame retardant performance and puncture resistance of the battery body 1, reduces delamination or failure caused by thermal expansion, and reduces the risk of short circuit caused by mechanical vibration or electrolyte corrosion. It is suitable for power batteries or energy storage systems with high requirements for safety and environmental adaptability.

[0036] Furthermore, PI adhesive also makes it feasible to reduce the thickness of the battery frame by 0.12-0.2mm, giving more room for optimization of the phone's thickness.

[0037] On the other hand, the first release layer 221 is transparent and serves as the initial protective layer, allowing direct observation of the adhesive layer 222's condition and ensuring uniform coverage of the battery's upper surface, thus reducing the appearance of bubbles or unbonded areas. The second release layer 223 is blue and serves as the final operating layer, often with an antistatic coating, making it suitable for high-speed automated peeling and reducing residual adhesive problems caused by electrostatic adsorption. The two layers clearly indicate the peeling sequence through a distinct color contrast, reducing the error rate of operation.

[0038] The implementation principle of the battery wrapping quick assembly structure in this application embodiment is as follows: The structure design combines the electrolytic tape layer 23 and the double-sided adhesive layer 22 to form an electrolytic adhesive fully wrapped integrated structure, which can be easily disassembled during maintenance. The materials are environmentally friendly and have excellent adhesive strength, reducing material waste and saving costs. At the same time, the traditional secondary assembly process is optimized into a one-time adhesive fixation, effectively improving production efficiency.

[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick assembly structure for encapsulating batteries, characterized in that, The battery body (1) and the composite wrapping layer (2) are included. The upper and lower surfaces of the battery body (1) are covered with aluminum-plastic film (11). The composite wrapping layer (2) includes an aluminum foil layer (21), a double-sided adhesive layer (22) and an electrolytic tape layer (23). The double-sided adhesive layer (22) includes a first release layer (221), an adhesive layer (222) and a second release layer (223). The first release layer (221), the aluminum foil layer (21), the adhesive layer (222), the electrolytic tape layer (23) and the second release layer (223) are stacked sequentially from top to bottom. After the second release layer (223) is removed, the electrolytic tape layer (23) is bonded and fixed to the upper surface of the battery body (1).

2. The battery encapsulation quick assembly structure according to claim 1, characterized in that, The area of ​​the adhesive layer (222) is larger than that of the battery body (1) and is disposed on the upper surface of the battery body (1).

3. The battery encapsulation quick assembly structure according to claim 2, characterized in that, The adhesive layer (222) extends out of the edge of the battery body (1) and is provided with inwardly folded side wing sealing folds (24) and tail wing sealing folds (25) on the sides and bottom of the battery body (1), respectively. The side wing sealing folds (24) and tail wing sealing folds (25) are folded inward and then bonded and fixed to the lower surface of the battery body (1).

4. The battery encapsulation quick assembly structure according to claim 3, characterized in that, An inwardly recessed notch (251) is provided at the connection between the two side wing sealing flanges (24) and the tail wing sealing flange (25).

5. The battery encapsulation quick assembly structure according to claim 3, characterized in that, The corner of the side wing sealing flange (24) is designed with a rounded shape.

6. The battery encapsulation quick assembly structure according to claim 1, characterized in that, The type of adhesive layer (222) is set to PI adhesive.

7. The battery encapsulation quick assembly structure according to claim 1, characterized in that, The first release layer (221) is transparent, and the second release layer (223) is blue.

8. The battery pack quick assembly structure according to claim 1, characterized in that, The electrolytic adhesive tape layer achieves a decrease in adhesive strength through at least one of the following mechanisms: redox reaction of metal ions, formation of microbubbles from electrolytically generated gas, polymer polar rearrangement, and chemical bond breaking or self-degradation.

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