Plastic plate split buckling structure for sealing long cover plate of lithium battery

Abstract

The utility model discloses a plastic plate split buckling structure for sealing a long cover plate of a lithium battery, which comprises a plurality of plastic plates, and at least one group of double-buckle structures made of PP (propene polymer) materials is arranged on the butt joint edge between every two adjacent plastic plates along the width direction of the butt joint edge. The height of the double-buckle structure is flush with the height of the plastic plate, the double-buckle structure comprises a vertically-through clamping groove and two oppositely-arranged clamping columns, and the top end of each clamping column is provided with an anti-disengaging part extending towards the side portion. The two clamping columns extend into the clamping groove from the lower end of the clamping groove until the anti-falling parts of the two clamping columns are attached to the upper end faces of the two sides of the clamping groove respectively, so that the adjacent plastic plates are buckled. Thus, through cooperation of the clamping groove and the two clamping columns, rapid buckling and separation are achieved, the connection mode of a plurality of split plastic plates for sealing the long cover plate of the lithium battery is simplified, and the plastic plate has the advantages of being easy to form, low in cost, convenient to disassemble, convenient to maintain and the like.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a split-type fastening structure for sealing a long cover plate of a lithium battery. Background Technology

[0002] The long cover of a lithium battery is typically sealed with a plastic sheet (PP material, polypropylene has advantages such as elasticity, high toughness, and good tensile strength), primarily to prevent battery fluid leakage. Batteries contain highly corrosive liquids, which can easily leak during long-term use, leading to battery damage or even explosion. The plastic sheet under the battery cover effectively prevents leakage, ensuring normal battery operation. Besides preventing leakage, the plastic sheet also serves multiple functions such as dustproofing and waterproofing. Currently used plastic sheets are one-piece structures, matching the length of the long cover. However, longer one-piece plastic sheets have thinner walls, making injection molding difficult, often resulting in deformation and warping. This leads to larger gaps when fitted with the cover, compressing the battery cells, making assembly difficult, and ultimately affecting battery performance and safety.

[0003] To address these issues, multiple plastic sheets are spliced ​​together. Traditionally, these sheets are fixed together using glue or screws, which results in complex processes, high costs, and inconvenient disassembly. Therefore, a simple and reliable connection structure is urgently needed. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a split-type fastening structure for sealing the long cover plate of a lithium battery with a plastic plate.

[0005] This utility model proposes a split-type snap-fit ​​structure for sealing a long cover plate of a lithium battery, comprising multiple plastic plates. At least one set of double snap-fit ​​structures made of PP material is arranged along the width direction of the mating edges between two adjacent plastic plates. The height of the double snap-fit ​​structure is flush with the height of the plastic plate, and includes a through groove and two oppositely arranged snap posts. Each snap post has an anti-detachment part extending to the side at its top. The two snap posts extend into the groove from the lower end of the groove, and their anti-detachment parts respectively fit against the upper surfaces of the groove to achieve snap-fit ​​between adjacent plastic plates.

[0006] Preferably, the lower ends of both sides of the card slot are provided with inwardly inclined guide slopes, and the top of the card post slides into the card slot along the guide slopes until the anti-detachment part is attached to the upper side surface of the card slot.

[0007] Preferably, the outer side of the locking post is provided with at least one protruding positioning rib, and the corresponding position of the locking groove is provided with a positioning groove that matches the positioning rib. When the locking post is fully inserted into the locking groove, the positioning rib is embedded in the positioning groove.

[0008] Preferably, the mating edge of the plastic sheet is provided with a groove, and an elastic sealing strip is installed in the groove. When two adjacent plastic sheets are fastened together by the double buckle structure, the elastic sealing strips on the two adjacent plastic sheets are squeezed against each other to form a double seal.

[0009] Preferably, the guide slope is provided with a lubricating coating.

[0010] Preferably, the card slot is designed as a square structure.

[0011] Preferably, one of the two adjacent plastic plates is integrated with the slot, and the other is integrated with the post.

[0012] In summary, this utility model has the following beneficial effects: two adjacent plastic plates are fastened together by at least one set of double buckle structures. Through the cooperation of the slot and two pins, quick fastening and separation are achieved, which simplifies the connection method between multiple split plastic plates for sealing the long cover plate of lithium battery. It has the advantages of simple molding, low cost, convenient disassembly and easy maintenance.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] Figure 1 This is a perspective view of the split-type fastening structure of the plastic sheet for sealing the long cover plate of the lithium battery according to an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 The state of the card slot in this embodiment of the utility model Figure 1 ;

[0017] Figure 4 The state of the card slot in this embodiment of the utility model Figure 2 ;

[0018] Figure 5 This is a schematic diagram of the structure of the card post according to an embodiment of the present utility model.

[0019] In the picture:

[0020] 1. Plastic sheet; 2. Double snap-fit ​​structure; 3. Slot; 4. Snap-fit ​​post; 5. Guide slope; 6. Anti-detachment part. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] like Figure 1-4 As shown in this embodiment, a split-type snap-fit ​​structure for sealing a long cover plate of a lithium battery includes multiple plastic plates 1. At least one set of double-buckle structures 2 made of PP material is arranged along the width direction of the mating edges between adjacent plastic plates 1 to ensure a stable connection. The height of the double-buckle structure 2 is flush with the height of the plastic plate 1, and includes a through-groove 3 and two opposing snap posts 4. Each snap post 4 has a side-extending anti-detachment part 6 at its top. The two snap posts 4 extend from the lower end of the groove 3 into the groove 3 until their anti-detachment parts 6 are respectively attached to the upper surfaces of both sides of the groove 3 to achieve snap-fit ​​between adjacent plastic plates 1. Specifically, the groove 3 is a square structure, but it can also be other shapes that meet the requirements, such as straight sides or curved ends, depending on the specific situation.

[0023] The anti-detachment part 5 is designed to prevent the locking pin 4 from coming out of the locking slot 3 under extreme conditions (such as when the battery is subjected to severe vibration or impact).

[0024] Furthermore, one of the two adjacent plastic plates 1 is integrated with the slot 3, and the other is integrated with the post 4. This simplifies the molding process and reduces costs.

[0025] In this way, the two adjacent plastic plates 1 are fastened together by at least one set of double buckle structure 2. Through the cooperation of the slot 3 and two buckle posts 4, quick fastening and separation are achieved, which simplifies the connection method between multiple split plastic plates for sealing the long cover of lithium battery. It has the advantages of simple molding, low cost, convenient disassembly and easy maintenance.

[0026] Furthermore, the lower ends of both sides of the slot 3 are provided with inwardly inclined guide slopes 5 to facilitate the insertion of the locking post 4. The top of the locking post 4 slides into the slot 3 along the guide slope 5 until the anti-detachment part 6 fits against the upper side surface of the slot 3.

[0027] The guide slope 5 is provided with a lubricating coating to reduce friction during the snap-fit ​​process and improve connection efficiency.

[0028] Furthermore, the outer surface of the locking post 4 is provided with at least one raised positioning rib (not shown in the figure), and the corresponding position of the locking groove 3 is provided with a positioning groove (not shown in the figure) that matches the positioning rib. When the locking post 4 is fully inserted into the locking groove 3, the positioning rib is embedded in the positioning groove. This further prevents the locking post 4 from moving laterally within the locking groove 3 and enhances the stability of the snap-fit ​​connection.

[0029] In this embodiment, the mating edge of the plastic plate 1 is provided with a groove (not shown in the figure), and an elastic sealing strip (not shown in the figure) is installed in the groove. When two adjacent plastic plates 1 are fastened together by the double snap-fit ​​structure 2, the elastic sealing strips on the two adjacent plastic plates 1 are pressed against each other to form a double seal. This effectively prevents electrolyte leakage and the entry of external air and moisture into the battery. The sealing strip is made of high-temperature resistant and chemically corrosion-resistant rubber material. Its hardness and elasticity are specially formulated to ensure good sealing performance under normal use conditions, and to maintain a certain elastic deformation during battery charging and discharging due to changes in internal pressure, thus maintaining a sealed state at all times.

[0030] It should be noted that the elastic sealing strip should be cut to the size of the groove at the edge of the plastic sheet, and then the sealing strip should be pasted into the groove with special glue to ensure that the sealing strip is installed firmly and flat.

[0031] In summary, during use, first align the plastic plate with the locking posts 4 with the plastic plate with the locking groove 3. Slowly insert the two locking posts 4 from the lower end of the locking groove 3 along the guide slope 5. The two locking posts 4 are compressed, causing elastic deformation and bringing them closer together. When the heads of the locking posts 4 protrude from the upper end of the locking groove 3, the locking posts 4 return to their original shape, and the anti-detachment parts 6 respectively fit against the upper surfaces of both sides of the locking groove 3. Simultaneously, the positioning ribs automatically embed into the positioning grooves, completing the fastening of the double-locking structure 2. During the fastening process, the sealing strips on adjacent plastic plates 1 press against each other to form a seal. By following the above steps, assemble multiple plastic plates sequentially, ultimately achieving the sealed installation of the lithium battery long cover.

[0032] It should be noted that when it is necessary to release the double buckle structure 2, the two buckle pins 4 can be pinched together in the middle, the anti-detachment part 6 of the two buckle pins 4 will be disengaged from the upper end of the buckle groove 3, and then the two buckle pins 4 can be pulled out from the lower end of the buckle groove 3. The disassembly is convenient and quick.

[0033] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A split-type snap-fit ​​structure for sealing a long cover plate of a lithium battery, comprising multiple plastic plates, characterized in that, At least one set of double-buckle structures made of PP material is arranged along the width direction of the mating edges between two adjacent plastic sheets. The height of the double-buckle structure is flush with the height of the plastic sheet, and includes a through groove and two oppositely arranged posts. Each post has an anti-detachment part extending to the side at its top. The two posts extend into the groove from the bottom of the groove, and their anti-detachment parts are respectively attached to the upper surfaces of the groove to achieve the fastening of adjacent plastic sheets.

2. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 1, characterized in that, The lower ends of both sides of the card slot are provided with inwardly inclined guide slopes. The top of the card post slides into the card slot along the guide slopes until the anti-detachment part is attached to the upper side surface of the card slot.

3. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 1, characterized in that, The outer side of the locking post is provided with at least one protruding positioning rib, and the corresponding position of the locking slot is provided with a positioning groove that matches the positioning rib. When the locking post is fully inserted into the locking slot, the positioning rib is embedded in the positioning groove.

4. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 1, characterized in that, The plastic sheet has a groove at the mating edge, and an elastic sealing strip is installed in the groove. When two adjacent plastic sheets are fastened together by the double buckle structure, the elastic sealing strips on the two adjacent plastic sheets are squeezed against each other to form a double seal.

5. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 2, characterized in that, The guide slope is provided with a lubricating coating.

6. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 1, characterized in that, The card slot is designed as a square card slot.

7. The split-type fastening structure of the plastic sheet for sealing the long cover plate of a lithium battery according to claim 1, characterized in that, One of the two adjacent plastic plates is integrated with the slot, and the other is integrated with the post.

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