Diaphragm assembly

Abstract

The utility model discloses a diaphragm assembly and belongs to the technical field of batteries, the diaphragm assembly can be adhered to a plurality of battery cells and a cover plate through an adhesive layer, a separation part corresponds to a gap, the gap is separated from the adhesive layer, when a base layer is pressed, the separation part abuts against the battery cells and / or the cover plate, mutual adhesion is blocked, and the battery cells and / or the cover plate are separated from each other. Therefore, the occurrence of abnormal sound is avoided; when the body part is separated from the adhesive layer, the separation part is reserved on the adhesive layer, other operations are not needed, and pasting of the membrane assembly in the assembling process is facilitated; in addition, after the membrane assembly is pasted, the thickness is increased due to the fact that the gap area corresponds to a three-layer structure composed of the separation part, the adhesive layer and the base layer, and the effect of structure enhancement can be achieved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a diaphragm assembly. Background Art

[0002] Mylar is a crucial component of batteries, adhered to the battery cells and cover plates via an adhesive layer, primarily providing electrical insulation and protection. In daily life, when users use devices with Mylar batteries, the gap between the battery cells and the cover plates causes pressure to be transferred to the Mylar structure, potentially causing the adhesive layer to adhere to or detach from the battery cells and / or cover plates, resulting in unusual noises. Utility Model Content

[0003] Purpose of the utility model: The embodiment of the present application provides a diaphragm assembly, which aims to solve the technical problem that the Mylar structure of the battery is prone to produce abnormal noise when subjected to pressure.

[0004] Technical solution: The diaphragm assembly described in the embodiment of the present application includes:

[0005] grassroots;

[0006] an adhesive layer, disposed on the base layer;

[0007] a release layer attached to a side of the adhesive layer away from the base layer, the release layer comprising a main body portion and a separation portion, the release layer being configured such that the main body portion can be separated from the adhesive layer and the separation portion is left on the adhesive layer;

[0008] The diaphragm assembly is configured to adhere the base layer to a plurality of battery cells and a cover plate between two adjacent battery cells through the adhesive layer, and to arrange the separation portion toward the gap between the battery cells and the cover plate.

[0009] In some embodiments, the main body has a receiving area, and the separation portion is disposed in the receiving area.

[0010] In some embodiments, the separation portion is spaced apart from the main body portion.

[0011] In some embodiments, the release layer further includes a plurality of first connecting portions spaced apart from each other, the plurality of first connecting portions being disposed in the accommodating area and arranged around the separating portion, the plurality of first connecting portions being connected to the main portion and the separating portion, respectively;

[0012] The first connecting portion is configured to break when the main body is separated from the adhesive layer.

[0013] In some embodiments, the main body has a plurality of the accommodating areas, the release layer includes a plurality of separation parts, and each of the separation parts is disposed in one of the accommodating areas.

[0014] In some embodiments, the main body includes a plurality of sub-parts, the separation part is disposed between at least two adjacent sub-parts, and the first connection part connects the adjacent sub-parts and the separation part respectively.

[0015] In some embodiments, the release layer further includes a second connecting portion, wherein the second connecting portion connects two adjacent sub-portions;

[0016] The second connecting portion is configured to break when the main body portion connected thereto is separated from the adhesive layer.

[0017] The release layer has a length direction and a width direction, the plurality of sub-portions are arranged along the width direction, and the second connecting portion extends along the length direction;

[0018] Alternatively, a plurality of the sub-portions are arranged along the length direction, and the second connecting portion extends along the width direction.

[0019] In some embodiments, the separation portion is one of polygonal, elliptical or circular.

[0020] In some embodiments, the release layer has a thickness of 0.02 mm to 0.04 mm.

[0021] Beneficial effects: The diaphragm assembly of the embodiment of the present application is adhered to multiple battery cells and cover plates through the adhesive layer, and the separation portion corresponds to the gap, separating the gap from the adhesive layer. When the base layer is subjected to pressing force, the separation portion is against the battery cells and / or cover plates, blocking the adhesion between each other, thereby avoiding the occurrence of abnormal noise; when the main body is separated from the adhesive layer, the separation portion is left on the adhesive layer, and no other operation is required, which facilitates the pasting of the diaphragm assembly during the assembly process; in addition, after the diaphragm assembly is pasted, since the gap area corresponds to the three-layer structure composed of the separation portion, the adhesive layer and the base layer, the thickness is increased, which can play a role in structural reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of the diaphragm assembly provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a first connecting portion provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the distribution positions of multiple main body parts provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of another distribution position of multiple main body parts provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of a battery cell and a cover plate provided in an embodiment of the present application;

[0028] Figure numerals: 1. base layer; 2. adhesive layer; 3. release layer; 31. main body; 311. accommodating area; 312. sub-part; 32. separation part; 33. first connecting part; 34. second connecting part; 4. battery cell; 5. cover plate; 6. gap. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "thickness," "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "plurality" means two or more, and "at least one" means one, two, or more than two, unless otherwise clearly and specifically defined.

[0031] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked X indicates the length direction X of the release layer, and the arrow marked Y indicates the width direction Y of the release layer. The length direction X and the width direction Y are introduced to more clearly illustrate the structure and relative position relationship of the various components in the diaphragm assembly. In actual applications, the length direction X and the width direction Y may change depending on the placement of the diaphragm assembly.

[0032] As a preface to the embodiment of the present application, Mylar has super strong insulation performance, excellent electrical, mechanical, heat-resistant and chemical-resistant properties, and is widely used in the electrical insulation industry, and is suitable for use as gaskets, baffles, screens and protection in electronics, household appliances, instruments, displays, motor slots, computers and peripheral equipment. The Mylar in the embodiment of the present application is mainly used as an important component of laptop batteries, playing the role of electrical insulation and protection. In daily work and life, as the thickness of laptop computers is getting thinner and thinner, users press on the computer keyboard surface when using laptop computers, and the pressing force will be easily transferred to the laptop battery. The Mylar of the laptop battery is adhered to the battery cell and the cover plate through the adhesive layer. Due to the gap between the battery cell and the cover plate, the Mylar will be deformed to a certain extent when it is pressed, causing the adhesive layer to adhere to the battery cell and / or the cover plate. When the pressing force is removed, the Mylar returns to its original state, causing the adhesive layer to separate from the battery cell and / or the cover plate, thereby generating abnormal noise, affecting the user experience.

[0033] Please refer to Figure 1 The membrane assembly of the present embodiment includes a base layer 1, an adhesive layer 2, and a release layer 3. Base layer 1 is made of a PET substrate, which is flame-retardant, high-strength, and suitable for surface printing. Adhesive layer 2 is applied to base layer 1 for bonding. Adhesive layer 2 can also be formed on the surface of base layer 1 by bonding, spraying, dipping, or other methods.

[0034] Please combine Figure 1 and Figure 5 The release layer 3 is attached to the side of the adhesive layer 2 away from the base layer 1. The release layer 3 includes a main portion 31 and a separating portion 32. The release layer 3 is configured so that the main portion 31 can be separated from the adhesive layer 2, while the separating portion 32 remains on the adhesive layer 2. The diaphragm assembly is configured so that the base layer 1 can be adhered to the plurality of battery cells 4 and the cover plate 5 between two adjacent battery cells 4 through the adhesive layer 2, with the separating portion 32 positioned toward the gap 6 between the battery cells 4 and the cover plate 5.

[0035] Separator 32 shields gap 6 and the surrounding area, separating it from adhesive layer 2 to prevent adhesion and detachment, thereby reducing noise. When pressure is applied to base layer 1, the three-layer structure formed by separator 32, adhesive layer 2, and base layer 1 is thicker than the remaining two-layer structure formed by base layer 1 and adhesive layer 2, increasing strength and improving deformation resistance.

[0036] When pasting the diaphragm assembly, the main body 31 is torn off from the adhesive layer 2, and the separating portion 32 is automatically separated from the main body 31 and remains bonded to the adhesive layer 2. No additional operation is required on the separating portion 32, which is beneficial to improving the pasting efficiency of the diaphragm assembly.

[0037] Please refer to Figure 1In some embodiments, the main body 31 has a receiving area 311, and the separation portion 32 is disposed within the receiving area 311. The inner contour of the receiving area 311 is similar to the outer contour of the separation portion 32. By providing the receiving area 311 on the main body 31, the portion separated from the receiving area 311 forms the separation portion 32, thereby fully utilizing the existing resource of the main body 31.

[0038] Please refer to Figure 1 In some embodiments, the separating portion 32 is spaced apart from the main body 31, that is, the separating portion 32 is completely separated from the main body 31. This allows the separating portion 32 to remain on the adhesive layer 2 after the main body 31 is removed. During processing, the separating portion 32 can be formed by simply adding a cutting step after the release layer 3 is attached. Compared to removing the portion of the adhesive layer 2 corresponding to the gap 6 through a debonding process, this method simplifies the process while maintaining the structural strength of the three-layer structure corresponding to the gap 6.

[0039] Please refer to Figure 2 In some embodiments, the release layer 3 further includes a plurality of spaced-apart first connecting portions 33 disposed within the accommodating area 311 and arranged around the separating portion 32. The plurality of first connecting portions 33 are respectively connected to the main body 31 and the separating portion 32. The first connecting portions 33 are configured to break when the main body 31 is separated from the adhesive layer 2. During processing, a die is used to cut the release layer 3 according to the desired shape of the separating portion 32, forming a circle of spaced-apart, track holes that penetrate the release layer 3. The solid portions between the track holes form the first connecting portions 33. The narrow width and length of the first connecting portions 33 result in low strength. Furthermore, the through-hole structure between adjacent first connecting portions 33 weakens the connection between the first connecting portions 33 and the main body 31 and the separating portion 32. When a tearing force is generated between the main body 31 and the separating portion 32, the first connecting portions 33 quickly break, thereby separating the main body 31 and the separating portion 32.

[0040] The plurality of first connection portions 33 maintain a partial connection between the main body portion 31 and the separation portion 32 , thereby reducing stress concentration at corners of the separation portion 32 and keeping the separation portion 32 straight to prevent warping.

[0041] Please refer to Figure 1 In some embodiments, the main body 31 has multiple accommodating areas 311, and the release layer 3 includes multiple separation portions 32, each of which is disposed within one of the accommodating areas 311. Each separation portion 32 can block a gap 6, and multiple separation portions 32 can correspond to multiple gaps 6 to meet the assembly requirements of batteries of different specifications.

[0042] Please combine Figure 3 and Figure 4In some embodiments, the main body 31 includes multiple sub-sections 312, the separating section 32 is disposed between at least two adjacent sub-sections 312, and the first connecting section 33 connects adjacent sub-sections 312 and the separating section 32. The multiple sub-sections 312 divide the release layer 3 into multiple pieces. The size of each sub-section 312 is reduced, which can reduce stress concentration and the tensile force exerted on the base layer 1 when the sub-section 312 separates from the adhesive layer 2, thereby maintaining the base layer 1 flat.

[0043] Please combine Figure 3 and Figure 4 In some embodiments, the release layer 3 further includes a second connecting portion 34, which connects two adjacent sub-portions 312 and is configured to break when the connected sub-portion 312 is separated from the adhesive layer 2. The structure of the second connecting portion 34 is the same as that of the first connecting portion 33, both employing a breaking connection method, which helps to keep the sub-portions 312 and the separation portion 32 straight and reduce warping. When a sub-portion 312 is separated from the adhesive layer 2, a tearing force is generated between the sub-portion 312, the adjacent sub-portion 312, and the adjacent separation portion 32, causing the second connecting portion 34 and the first connecting portion 33 to break, thereby achieving the separation of the sub-portion 312.

[0044] In some embodiments, the release layer 3 has a length direction X and a width direction Y, the plurality of sub-portions 312 are arranged in the width direction Y, and the second connecting portion 34 extends along the length direction X and is connected to the first connecting portion 33 .

[0045] Alternatively, the plurality of sub-portions 312 are arranged along the length direction X, and the second connecting portion 34 extends along the width direction Y and is connected to the first connecting portion 33. The different arrangements of the plurality of sub-portions 312 increase the flexibility of the arrangement and can be adjusted according to specific application scenarios to accommodate release layers 3 of different sizes and shapes.

[0046] Please refer to Figure 1 In some embodiments, the separation portion 32 is polygonal, elliptical or circular, wherein the polygon can be rectangular or diamond-shaped. In this embodiment, the separation portion 32 is rectangular to facilitate die-cutting design.

[0047] In some embodiments, the thickness of the release layer 3 is between 0.02 mm and 0.04 mm, specifically any value among 0.02 mm, 0.03 mm, and 0.04 mm, or a range between any two values. Since the separation portion 32 is formed by dividing the release layer 3, the thickness of the release layer 3 is equal to the thickness of the separation portion 32. Separation portions 32 within this thickness range can, on the one hand, cooperate with the adhesive layer 2 and the base layer 1 to form a three-layer structure that reinforces the position of the gap 6, and on the other hand, maintain the outward protrusion of the base layer 1 within the design requirements, thereby maintaining the overall flatness of the battery's outer surface.

[0048] The diaphragm assembly provided in the embodiments of the present application is introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A diaphragm assembly, characterized in that: include: Grassroots (1); An adhesive layer (2) is provided on the base layer (1); a release layer (3) attached to a side of the adhesive layer (2) away from the base layer (1), the release layer (3) comprising a main body (31) and a separation portion (32), the release layer (3) being configured such that the main body (31) can be separated from the adhesive layer (2) and the separation portion (32) remains on the adhesive layer (2); The diaphragm assembly is configured to be able to adhere the base layer (1) to a plurality of battery cells (4) and a cover plate (5) between two adjacent battery cells (4) through the adhesive layer (2), and to arrange the separation portion (32) toward the gap (6) between the battery cells (4) and the cover plate (5).

2. The diaphragm assembly according to claim 1, characterized in that The main body (31) has a receiving area (311), and the separation portion (32) is arranged in the receiving area (311).

3. The diaphragm assembly according to claim 2, characterized in that The separation portion (32) is spaced apart from the main body portion (31).

4. The diaphragm assembly according to claim 2, characterized in that The release layer (3) further comprises a plurality of first connecting portions (33) spaced apart from each other, the plurality of first connecting portions (33) being arranged in the accommodating area (311) and arranged around the separating portion (32), the plurality of first connecting portions (33) being connected to the main body portion (31) and the separating portion (32) respectively; The first connecting portion (33) is configured to break when the main body (31) is separated from the adhesive layer (2).

5. The diaphragm assembly according to claim 2, characterized in that The main body (31) has a plurality of accommodating areas (311), and the release layer (3) includes a plurality of separation parts (32), each of the separation parts (32) being arranged in one of the accommodating areas (311).

6. The diaphragm assembly according to claim 4, characterized in that The main body (31) includes a plurality of sub-parts (312), the separation part (32) is arranged between at least two adjacent sub-parts (312), and the first connection part (33) respectively connects the adjacent sub-parts (312) and the separation part (32).

7. The diaphragm assembly according to claim 6, characterized in that The release layer (3) further includes a second connecting portion (34), wherein the second connecting portion (34) connects two adjacent sub-portions (312); The second connecting portion (34) is configured to break when the sub-portion (312) connected thereto is detached from the adhesive layer (2).

8. The diaphragm assembly according to claim 7, characterized in that The release layer (3) has a length direction and a width direction, the plurality of sub-portions (312) are arranged along the width direction, and the second connecting portion (34) extends along the length direction; Alternatively, a plurality of the sub-portions (312) are arranged along the length direction, and the second connecting portion (34) extends along the width direction.

9. The diaphragm assembly according to claim 1, characterized in that The separation portion (32) is in the shape of a polygon, an ellipse or a circle.

10. The diaphragm assembly according to claim 1, wherein: The thickness of the release layer (3) is 0.02 mm to 0.04 mm.

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