Self-restoring plastic and battery top cover

Abstract

The utility model discloses a kind of self-recovery lower plastic and battery top cover, including lower plastic body, lower plastic body is provided with lower injection hole, the inner peripheral wall of lower injection hole is provided with deformation sealing part, deformation sealing part includes multiple deformation sealing sheet, in first state, deformation sealing part is in natural state, and deformation sealing sheet is inclined and set to upwards, first separation space is provided between adjacent deformation sealing sheet;In second state, deformation sealing part is in deformation state, and deformation sealing sheet is horizontally set, and adjacent deformation sealing sheet is set to adhere between;In third state, deformation sealing part is in deformation state, and deformation sealing sheet is inclined and set to downwards, third separation space is provided between adjacent deformation sealing sheet.Using the above scheme, provide a kind of self-recovery lower plastic and battery top cover, which prevents battery liquid overflow by sealing deformation sheet deformation covering upper injection hole when injection column is pulled out from lower injection hole.

Description

Technical Field

[0001] This utility model belongs to the field of new energy batteries, specifically relating to a self-healing lower plastic and battery top cover. Background Technology

[0002] The battery top cover consists of an upper housing, a lower housing, and a terminal assembly. The upper housing may be made of metal or plastic, the lower housing is made of plastic, and the terminal assembly is mounted on the upper housing and / or the lower housing.

[0003] In addition, an injection hole needs to be provided on the upper casing so that the injection column can be inserted into the battery casing through the injection hole to inject battery fluid. After the battery fluid is injected, the injection column is pulled out from the injection hole.

[0004] The problem with existing battery top covers is that the injection pressure of the injection column into the battery casing is relatively high. After the injection column is pulled out, the injection hole is in an open state, which causes the battery fluid inside the battery casing to overflow from the injection hole under hydraulic pressure. This requires cleaning up the overflowing battery fluid and reduces production efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a self-restoring lower plastic and battery top cover that prevents battery fluid from overflowing by deforming and covering the upper injection hole with a sealing deformation sheet when the injection column is pulled out from the lower injection hole.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A self-healing lower plastic includes a lower plastic body with a liquid injection hole. A deformation sealing portion is provided on the inner peripheral wall of the liquid injection hole. The deformation sealing portion includes multiple deformation sealing sheets arranged circumferentially. The deformation sealing sheets have a first state, a second state, and a third state. In the first state, the deformation sealing portion is in a natural state, and the deformation sealing sheets are inclined upwards, with a first separation space between adjacent deformation sealing sheets. In the second state, the deformation sealing portion is in a deformed state, and the deformation sealing sheets are horizontally arranged, with adjacent deformation sealing sheets fitting together. In the third state, the deformation sealing portion is in a deformed state, and the deformation sealing sheets are inclined downwards, with a third separation space between adjacent deformation sealing sheets.

[0007] The present invention is further configured such that: the lower injection hole is square, and the number of deformation sealing pieces is 4, each deformation sealing piece is triangular to correspond to the four sides of the lower injection hole.

[0008] The present invention is further configured such that: the deformation sealing part and the lower plastic body are integrally connected; and / or, the deformation sealing part is an integral piece.

[0009] The present invention is further configured such that: a deformation notch is provided on the outer periphery of the top of the lower plastic body located at the lower injection hole.

[0010] The present invention is further configured such that: the depth of the injection hole is h1, and the depth of the deformation notch is h2, wherein 3*h2≤h1≤6*h2.

[0011] The present invention is further configured such that: the deformation sealing part includes a deformation connecting part that connects the deformation sealing sheet and the inner peripheral wall of the lower injection hole, and the thickness of the deformation connecting part is d; wherein, 0.2mm≤d≤1mm.

[0012] The present invention is further configured such that: the deformable sealing sheet has a first surface, a second surface, and a connecting side surface connecting the first surface and the second surface; in the second state, the first surface is facing upward and the second surface is facing downward; the included angle between the first surface and the connecting side surface is α1, wherein α1 > 90°; the included angle between the second surface and the connecting side surface is α2, wherein α2 < 90°.

[0013] A battery top cover includes: an upper housing with an upper liquid injection hole; the aforementioned self-healing lower plastic; the upper liquid injection hole and the lower liquid injection hole are arranged vertically aligned; the upper housing is mounted on top of the lower plastic body, and a deformation sealing sheet is in a second state under the action of the upper housing, the deformation sealing sheet sealing the bottom of the upper liquid injection hole.

[0014] The present invention is further configured such that the upper injection hole is circular.

[0015] The present invention is further configured such that: an upper injection hole and a lower injection hole are for the injection column to be inserted; the injection column is inserted downward into the lower injection hole to change the deformation sealing sheet from the second state to the third state; the injection column is pulled out from the lower injection hole to reset the deformation sealing part from the third state to the second state.

[0016] By adopting the above technical solution, 1. the deformable sealing sheet can be flipped downwards from the first state to the second state, and from the second state to the third state. Since the deformable sealing part is in a natural state in the first state, while the deformable sealing part is in a deformed state in both the second and third states, the deformable sealing sheet in the third state has a tendency to flip upwards to the second state, and the deformable sealing sheet in the second state has a tendency to flip upwards to the first state. 2. The setting of the first dividing space makes the flipping strokes of the deformable sealing sheet as complementary as possible during the assembly of the lower plastic, so as to more smoothly reach the second state. 3. Adjacent deformable sealing sheets in the second state are in close contact. The system is configured such that the second state can be used as a sealed state, and the deformable sealing sheets are fitted together to cover and seal the area. The deformable sealing sheets in the second state have a tendency to deform towards the first state, making it difficult for the deformable sealing sheets to change from the second state to the third state, thus ensuring the sealing effect. 4. The injection column can be inserted downward into the injection hole to flip the deformable sealing sheets in the second state downward to the third state. Due to the existence of the third partition space, the injection column can penetrate downward to the underside of the deformable sealing sheet to inject battery fluid. When the injection column is finished and pulled upward, the deformable sealing sheet in the third state quickly returns to the second state due to the deformation reset of the deformable sealing part in the deformable state. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is an assembly drawing of Embodiment 1 of the present utility model; Figure 2 This is an assembly drawing of Embodiment 1 of the present utility model; Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention in its first state; Figure 4 This is a cross-sectional view of Embodiment 1 of the present invention in the second state; Figure 5 This is a cross-sectional view of Embodiment 1 of the present invention in the third state; Figure 6 for Figure 1 Enlarged view of A in the middle; Figure 7 for Figure 2 Enlarged view of B in the middle; Figure 8 for Figure 3Enlarged view of C; Figure 9 for Figure 4 Enlarged view of D; Figure 10 for Figure 5 Enlarged view of E in the middle; Figure 11 This is an assembly drawing of Embodiment 2 of the present invention; Figure 12 This is an exploded view of Embodiment 2 of this utility model; Figure 13 This is a cross-sectional view of Embodiment 2 of the present invention; Figure 14 for Figure 13 Enlarged view of F in the middle.

[0019] Explanation of reference numerals in the attached diagram: 1. Lower plastic body; 11. Injection port; 12. Second electrode post port; 111. Deformation groove; 2. Deformation sealing part; 21. Deformation sealing sheet; 22. Deformation connection part; 211. First partition space; 213. Third partition space; 214. First surface; 215. Second surface; 216. Connecting side; 3. Upper shell; 31. Upper injection hole; 32. First pole hole. Detailed Implementation

[0020] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model, and the specific and direct descriptions of related structures are merely for the convenience of understanding the present utility model; the specific features do not necessarily or directly limit the scope of implementation of the present utility model. Conventional choices and substitutions made by those skilled in the art under the guidance of the present utility model should all be considered within the scope of protection claimed by this utility model.

[0021] Example 1: like Figures 1-10 As shown, this utility model discloses a self-healing lower plastic, including a lower plastic body 1, a lower injection hole 11 is provided on the lower plastic body 1, and a deformation sealing part 2 is provided on the inner peripheral wall of the lower injection hole 11. The deformation sealing part 2 includes multiple deformation sealing sheets 21 arranged in the circumferential direction. The deformation sealing sheets 21 have a first state, a second state and a third state. like Figure 3As shown, in the first state, the deformation sealing part 2 is in a natural state, and the deformation sealing sheet 21 is inclined upwards, and a first partition space 211 is provided between adjacent deformation sealing sheets 21. like Figure 4 As shown, in the second state, the deformation sealing part 2 is in a deformed state, and the deformation sealing sheet 21 is horizontally arranged, with adjacent deformation sealing sheets 21 being fitted together. like Figure 5 As shown, in the third state, the deformation sealing part 2 is in a deformed state, and the deformation sealing sheet 21 is inclined downwards, and a third partition space 213 is provided between adjacent deformation sealing sheets 21.

[0022] Therefore, 1. The deformable sealing sheet 21 can be flipped downwards from the first state to the second state, and from the second state to the third state. Since the deformable sealing part 2 is in a natural state in the first state, while the deformable sealing part 2 is in a deformed state in both the second and third states, the deformable sealing sheet 21 in the third state has a tendency to flip upwards to the second state, and the deformable sealing sheet 21 in the second state has a tendency to flip upwards to the first state. 2. The arrangement of the first dividing space 211 ensures that the flipping strokes of the deformable sealing sheet 21 complement each other as much as possible when assembling the lower plastic, thus making it smoother to the second state. 3. Adjacent deformable sealing sheets 21 in the second state are fitted together. The second state can be used as a sealed state, so as to cover and seal by the attached deformation sealing sheets 21. The deformation sealing sheets 21 in the second state have a deformation tendency towards the first state, so that the deformation sealing sheets 21 are not easy to change from the second state to the third state, thus ensuring the sealing effect. 4. The injection column can be inserted downward into the injection hole to flip the deformation sealing sheets 21 in the second state downward to the third state. Due to the existence of the third partition space 213, the injection column can be inserted downward to the bottom of the deformation sealing sheet 21 to inject battery fluid. When the injection column is finished and pulled upward, the deformation sealing sheet 21 in the third state quickly returns to the second state due to the deformation reset of the deformation sealing part 2 in the deformation state.

[0023] Specifically, the injection hole 11 is square, and there are four deformable sealing pieces 21, all of the same shape. Each deformable sealing piece 21 is triangular in shape to correspond to the four sides of the injection hole 11, so as to make the overall structure more orderly.

[0024] Preferably, the deformable sealing part 2 and the lower plastic body 1 are integrally connected; and the deformable sealing part 2 is a single piece. This allows the lower plastic body to be formed by injection molding as a single unit, simplifying the overall structure and reducing production costs.

[0025] In addition, a deformation notch 111 is provided on the outer periphery of the top of the lower injection hole 11 of the lower plastic body 1, so that the deformation notch 111 can provide space to adapt to the deformation when the deformation sealing part 2 is deformed, and prevent the deformation of the lower plastic body 1 caused by the deformation of the deformation sealing part 2 from affecting the sealing of other parts.

[0026] Preferably, the depth of the injection hole 11 is h1, and the depth of the deformation notch 111 is h2, wherein 3*h2≤h1≤6*h2. By setting an appropriate depth for the injection hole 11, the deformation can be accommodated while preventing the wall thickness around the injection hole 11 from being too thin, which would result in insufficient strength.

[0027] The deformation sealing part 2 includes an annular deformation connecting part 22. The outer periphery of the deformation connecting part 22 is horizontally oriented and integrally formed with the inner peripheral wall of the lower injection hole 11. The inner periphery of the deformation connecting part 22 is inclined upward and integrally formed with the inclined lower end of the deformation sealing piece 21, thus realizing the connection between the deformation connecting piece and the inner peripheral wall of the lower injection hole 11. The thickness of the deformation connecting part 22 is d; wherein, 0.2mm≤d≤1mm. This allows for a relatively thin deformation connecting part 22 while ensuring smooth deformation.

[0028] The deformable sealing sheet 21 is provided with a first surface 214, a second surface 215, and a connecting side surface 216 connecting the first surface 214 and the second surface 215. In the second state, the first surface 214 is facing upward and the second surface 215 is facing downward. The included angle between the first surface 214 and the connecting side surface 216 is α1, where α1 > 90°. The included angle between the second surface 215 and the connecting side surface 216 is α2, where α2 < 90°.

[0029] Therefore, by misaligning the edges of the first surface 214 and the second surface 215, the adjacent connecting sides 216 in the second state cannot completely abut each other, thus making the transition between the second and third states smoother through a smaller surface contact seal or line contact seal.

[0030] Example 2: like Figures 11-14 As shown, this utility model discloses a battery top cover, comprising: The upper housing 3 is made of metal and has an upper injection hole 31 and first pole hole 32 on the left and right sides. The self-healing lower plastic body 1 described in Example 1 has second pole holes 12 on the left and right sides. Terminal assembly (not shown in the attached diagram, but is a conventional structure in this field); The first pole post hole 32 and the second pole post hole 12 are arranged vertically aligned, and the pole post assembly is installed in the first pole post hole 32 and the second pole post hole 12 to clamp and fix the upper housing 3 and the lower plastic. The upper injection hole 31 and the lower injection hole 11 are arranged vertically opposite each other, and the upper injection hole 31 and the lower injection hole 11 are for the injection column to be inserted; The upper housing 3 is mounted on top of the lower plastic body 1, and the deformation sealing sheet 21 is in a second state under the action of the upper housing 3, and the deformation sealing sheet 21 seals the bottom of the upper injection hole 31.

[0031] Therefore, the injection column passes downwards through the upper injection hole 31 and abuts against the deformable sealing plate 21 in the second state. The injection column continues downwards, inserting into the lower injection hole 11 while simultaneously applying force to the deformable sealing plate 21. This causes the deformable sealing plate 21 to flip downwards, changing it from the second state to the third state. In the third state, the injection column can inject battery fluid downwards. After injection is complete, the injection column is gradually pulled upwards to allow the deformable sealing plate 21 in the third state to gradually return to the second state. That is, as soon as the injection column exits the lower injection hole 11, the deformable sealing plate 21 in the second state seals the bottom of the upper injection hole 31. Therefore, when the subsequent injection column continues to be pulled upwards and exits the upper injection hole 31, the battery fluid below the deformable sealing plate 21 cannot overflow upwards, ensuring the reliability of the seal.

[0032] Preferably, in this embodiment, the upper injection hole 31 is circular so that the shape of the upper injection hole 31 is adapted to the shape of the injection column. That is, the upper injection hole 31 not only guides the inserted injection column, but also has a smaller gap to prevent battery fluid from overflowing.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-healing plastic, characterized in that, The device includes a lower plastic body (1), on which a lower injection hole (11) is provided. A deformation sealing part (2) is provided on the inner peripheral wall of the lower injection hole (11). The deformation sealing part (2) includes multiple deformation sealing sheets (21) arranged circumferentially. The deformation sealing sheets (21) have a first state, a second state and a third state. In the first state, the deformation sealing part (2) is in a natural state, and the deformation sealing sheet (21) is inclined upward, and a first partition space (211) is provided between adjacent deformation sealing sheets (21). In the second state, the deformation sealing part (2) is in a deformed state, and the deformation sealing sheet (21) is horizontally arranged, with adjacent deformation sealing sheets (21) being fitted together. In the third state, the deformation sealing part (2) is in a deformed state, and the deformation sealing piece (21) is inclined downward, and a third partition space (213) is provided between adjacent deformation sealing pieces (21).

2. The self-healing plastic according to claim 1, characterized in that: The lower injection hole (11) is square, and there are 4 deformable sealing pieces (21). Each deformable sealing piece (21) is triangular in shape to correspond to the four sides of the lower injection hole (11).

3. The self-healing plastic according to claim 1, characterized in that: The deformation sealing part (2) and the lower plastic body (1) are integrally connected; and / or, the deformation sealing part (2) is an integral piece.

4. The self-healing plastic according to claim 1, characterized in that: The lower plastic body (1) is provided with a deformation notch (111) on the top outer periphery of the lower injection hole (11).

5. The self-healing plastic according to claim 4, characterized in that: The depth of the lower injection hole (11) is h1, and the depth of the deformation notch (111) is h2, wherein 3*h2≤h1≤6*h2.

6. The self-healing plastic according to claim 1, characterized in that: The deformable sealing part (2) includes a deformable connecting part (22) that connects the deformable sealing sheet (21) and the inner peripheral wall of the lower injection hole (11), and the thickness of the deformable connecting part (22) is d; Where 0.2mm≤d≤1mm.

7. The self-healing plastic according to claim 1, characterized in that: The deformable sealing sheet (21) is provided with a first surface (214), a second surface (215) and a connecting side surface (216) that connects the first surface (214) and the second surface (215). In the second state, the first surface (214) is facing upwards and the second surface (215) is facing downwards; The included angle between the first surface (214) and the connecting side (216) is α1, where α1 > 90°; The included angle between the second surface (215) and the connecting side (216) is α2, where α2 < 90°.

8. A battery top cover, characterized in that, include: Upper housing (3), the upper housing (3) is provided with an upper liquid injection hole (31); The self-healing plastic according to any one of claims 1-7; The upper injection hole (31) and the lower injection hole (11) are arranged vertically opposite each other; The upper housing (3) is mounted above the lower plastic body (1), and the deformation sealing sheet (21) is in a second state under the action of the upper housing (3), and the deformation sealing sheet (21) seals the bottom of the upper injection hole (31).

9. The battery top cover according to claim 8, characterized in that: The upper injection hole (31) is circular.

10. The battery top cover according to claim 8, characterized in that: The upper injection hole (31) and the lower injection hole (11) are for the insertion of the injection column; The injection column is inserted downward into the lower injection hole (11) to change the deformation sealing sheet (21) from the second state to the third state; The injection column is pulled out from the lower injection hole (11) so that the deformation seal (2) is deformed and reset from the third state to the second state.

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