Upper plastic part structure convenient to demould and battery cover plate

Abstract

The utility model relates to the technical field of battery cover plates, and discloses an upper plastic part structure convenient to demould and a battery cover plate, the upper plastic part structure convenient to demould comprises a top cover sheet, a pole column hole is arranged in the top cover sheet, and a pole column is arranged in the pole column hole in a penetrating manner; an enclosing wall is convexly arranged on the top cover piece, and an upper plastic part is formed on the top cover piece through injection molding; the upper plastic part is provided with a wrapping part wrapping the enclosure wall; a bending position is formed at the edge of the top of the wrapping part, the bending position is bent in an arc shape, a peripheral side wall is formed on the periphery of the wrapping part, and the peripheral side wall is obliquely arranged inwards in the direction from bottom to top of the wrapping part; in the process of assembling and manufacturing the top cover of the battery, after a pole penetrates through a top cover sheet, a mold is arranged on the top cover sheet, an upper plastic part is formed in the mold in an injection molding manner, and the pole and the top cover are connected and combined into a whole by the formed upper plastic part; due to the fact that the bending position is bent in the arc shape, and the peripheral side wall is inclined inwards, separation between the mold and the upper plastic part is facilitated, and demolding between the mold and the upper plastic part is facilitated.

Description

Technical Field

[0001] This utility model patent relates to the technical field of battery cover plates, specifically to an upper plastic part structure that facilitates demolding and a battery cover plate. Background Technology

[0002] The battery cover is an important component of the battery. It covers the top opening of the outer casing and forms a cavity between the cover and the outer casing to house the battery cell.

[0003] The battery cover includes a top cover sheet, through which an electrode post is inserted. An upper plastic part is formed on the top cover sheet by injection molding, and the upper plastic part surrounds the outer periphery of the electrode post, fixing the electrode post relatively.

[0004] In the prior art, after the terminal post is assembled in the top cover plate, injection molding is performed on the top cover plate to form the upper plastic part. However, after injection molding is completed, the bonding force between the upper plastic part and the mold is large, making it difficult to demold the mold and the upper plastic part, which greatly reduces the assembly efficiency of the battery cover plate. Utility Model Content

[0005] The purpose of this invention is to provide an upper plastic part structure that facilitates demolding, thereby solving the problem of difficulty in demolding the mold and the upper plastic part in the prior art.

[0006] This utility model is implemented as follows: an upper plastic part structure that facilitates demolding includes a top cover plate, the top cover plate having an electrode post hole, an electrode post passing through the electrode post hole; a surrounding wall protruding from the top cover plate, the surrounding wall being arranged around the circumference of the electrode post hole; and an upper plastic part being injection molded on the top cover plate.

[0007] The upper plastic part has a wrapping part that wraps around the outside of the enclosure wall; the top edge of the wrapping part forms a bend, the bend is curved in an arc, and the outer periphery of the wrapping part forms an outer peripheral sidewall, which is arranged inwardly along the direction from bottom to top of the wrapping part.

[0008] Furthermore, the radius of the arc at the bend is greater than 0.8 mm.

[0009] Furthermore, the wrapping portion includes a top cover portion, the top of which is arranged in a flat shape.

[0010] Furthermore, the wrapping portion includes an outer peripheral covering portion, the top covering portion and the outer peripheral covering portion are bent and joined to form the bending position, and the outer peripheral sidewall is formed on the outer periphery of the outer peripheral covering portion.

[0011] Furthermore, the enclosing wall is curved upward toward the pole hole and is enclosed in the upper plastic part.

[0012] Furthermore, the enclosing wall has an outwardly arranged and curved surface, which is arranged toward the wrapping part and is wrapped by the wrapping part from the outside to the inside.

[0013] Furthermore, the lower end of the enclosing wall is connected to the top cover plate, and the upper end of the enclosing wall is arranged towards the pole post to form an inner extension end; there is an upper annular gap between the inner extension end and the pole post, and the upper plastic part is embedded in the upper annular gap to form an inset portion that fills the upper annular gap, and the inset portion abuts against the outer periphery of the pole post and the upper end of the enclosing wall.

[0014] Furthermore, the embedded portion extends to the bottom of the inner extension end to form a bottom ring, which abuts against the inner extension end from bottom to top.

[0015] Furthermore, there is a central annular gap between the pole and the middle part of the enclosing wall, and the outer periphery of the pole is wrapped with a rubber-coated ring, which fills the central annular gap and abuts against the middle part of the enclosing wall.

[0016] Furthermore, the embedded portion presses against the rubber-coated ring from top to bottom.

[0017] Compared with the prior art, the upper plastic part structure provided by this utility model facilitates demolding. During the assembly and manufacturing of the battery top cover, after the terminal post is inserted into the top cover sheet, a mold is arranged on the top cover sheet, and the upper plastic part is injection molded in the mold. The molded upper plastic part covers the enclosure wall of the top cover sheet and wraps around the outer periphery of the terminal post, connecting the terminal post and the top cover into one piece. Since the bending position is curved in an arc and the outer peripheral side wall is arranged inward, it is convenient to separate the mold and the upper plastic part, and to demold the mold and the upper plastic part.

[0018] This utility model also provides a battery cover plate in this embodiment, including the above-mentioned upper plastic part structure that facilitates demolding.

[0019] Compared with the prior art, the battery cover provided by this utility model facilitates demolding between the mold and the upper plastic part during the injection molding process of the battery top cover assembly and manufacturing, thereby greatly improving the manufacturing efficiency of the battery cover and saving manufacturing costs. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the upper plastic part structure that facilitates demolding provided by this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the fit between the pole post and the enclosing wall provided by this utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the upper plastic part provided by this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.

[0027] The upper plastic part structure that facilitates demolding includes a top cover plate 100, which has an pole hole and a pole 200 passing through the pole hole; a surrounding wall 101 protrudes from the top cover plate 100 and is arranged around the pole hole in the circumference; and an upper plastic part 300 is injection molded on the top cover plate 100.

[0028] The upper plastic part 300 has a wrapping part that wraps around the outside of the enclosure wall 101; the top edge of the wrapping part forms a bend 302, the bend 302 is curved in an arc, and an outer peripheral sidewall 301 is formed on the outer periphery of the wrapping part, and the outer peripheral sidewall 301 is arranged inwardly along the direction from bottom to top of the wrapping part.

[0029] The aforementioned easy-to-demold upper plastic part structure, during the assembly and manufacturing of the battery top cover, after the terminal post 200 passes through the top cover plate 100, a mold is arranged on the top cover plate 100, and the upper plastic part 300 is injection molded in the mold. The molded upper plastic part 300 wraps around the enclosure wall 101 of the top cover plate 100 and wraps around the outer periphery of the terminal post 200, connecting the terminal post 200 and the top cover into one piece. Since the bending position 302 is curved in an arc and the outer peripheral side wall 301 is arranged inwardly, the bonding force between the mold and the upper plastic part 300 is reduced, which facilitates the separation between the mold and the upper plastic part 300 and facilitates demolding between the mold and the upper plastic part 300.

[0030] In this embodiment, the radius of the arc of the bending position 302 is greater than 0.8mm, the bonding force between the mold and the upper plastic part 300 is small, and it is easy to demold. If the radius of the arc of the bending position 302 is too small, a strong force will be formed between the mold and the upper plastic part 300, making it difficult to demold. A gap will be formed between the upper plastic and the top cover plate 100, affecting the product performance and appearance.

[0031] In this embodiment, the wrapping part includes a top cover 305, the top of which is arranged in a flat shape to facilitate demolding of the upper plastic part 300 from the mold.

[0032] In this embodiment, the wrapping portion includes an outer peripheral covering portion 304, and a top covering portion 305 is bent and joined with the outer peripheral covering portion 304 to form a bending position 302. An outer peripheral sidewall 301 is formed on the outer periphery of the outer peripheral covering portion 304. In this way, the top covering portion 305 and the outer peripheral covering portion 304 are arranged in a bent manner, which can achieve full coverage of the enclosing wall 101, so that the combination between the upper plastic part 300 and the top cover piece 100 is more stable.

[0033] In this embodiment, the enclosing wall 101 is bent upward toward the pole hole and is wrapped in the upper plastic part 300. In this way, when the enclosing wall 101 is wrapped in the upper plastic part 300 and bends downward to press against the upper plastic part 300, the connection between the upper plastic part 300 and the top cover plate 100 can be more stable.

[0034] In this embodiment, the enclosing wall 101 has an outwardly arranged and curved surface 105, which faces the wrapping portion and is wrapped by the wrapping portion from the outside to the inside. In this way, during the injection molding process of the upper plastic part 300, it is convenient to form the upper plastic part 300 and to make the upper plastic part 300 and the curved surface 105 fit together completely.

[0035] In this embodiment, the lower end of the enclosure wall 101 is connected to the top cover plate 100, and the upper end of the enclosure wall 101 is arranged towards the pole post 200 to form an inner extension end 106; there is an upper annular gap 102 between the inner extension end 106 and the pole post 200, and the upper plastic part 300 is embedded in the upper annular gap 102 to form an inset part 303 that fills the upper annular gap 102, and the inset part 303 abuts against the outer periphery of the pole post 200 and the upper end of the enclosure wall 101.

[0036] In this way, the embedded part 303 is sandwiched between the pole post 200 and the enclosing wall 101, and the embedded part 303 wraps around the enclosing wall 101, forming a stable integral structure with the enclosing wall 101, thereby also making the embedded part 303 and the pole post 200 integrated.

[0037] In this embodiment, the embedded portion 303 extends to the bottom of the inner extension end 106 to form a bottom ring 302, which abuts against the inner extension end 106 from bottom to top. This allows the upper plastic part 300 to better wrap and hold the enclosing wall 101, thereby enabling the upper plastic part 300 to be better fixedly connected to the enclosing wall 101.

[0038] In this embodiment, there is a central annular gap 103 between the pole post 200 and the middle part of the enclosing wall 101. The outer periphery of the pole post 200 is wrapped with a rubber-coated ring 105, which fills the central annular gap 103 and abuts against the middle part of the enclosing wall 101. The rubber-coated ring 105 abuts against the upper plastic part 300, so that the top cover 100, the rubber-coated ring 105, the pole post 200 and the upper plastic part 300 can form an integral structure.

[0039] This embodiment also provides a battery cover plate, which includes the aforementioned upper plastic part structure that facilitates demolding. In this way, during the assembly and manufacturing process of the battery top cover, the demolding between the mold and the upper plastic part 300 is facilitated, thereby greatly improving the manufacturing efficiency of the battery cover plate and saving manufacturing costs.

[0040] The aforementioned easy-to-demold upper plastic part structure, during the assembly and manufacturing of the battery top cover, after the terminal post 200 passes through the top cover piece 100, a mold is arranged on the top cover piece 100, and the upper plastic part 300 is injection molded in the mold. The molded upper plastic part 300 wraps around the enclosure wall 101 of the top cover piece 100 and wraps around the outer periphery of the terminal post 200, connecting the terminal post 200 and the top cover into one piece. Since the bending position 302 is curved in an arc and the outer peripheral side wall 301 is arranged inwardly, the bonding force between the mold and the upper plastic part 300 is reduced, making it easier to separate the mold and the upper plastic part 300.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A molded upper part structure that facilitates demolding, characterized in that, Includes a top cover sheet, which has an electrode post hole through which an electrode post passes; a surrounding wall protrudes from the top cover sheet and is arranged around the circumference of the electrode post hole; an upper plastic part is injection molded on the top cover sheet. The upper plastic part has a wrapping part that wraps around the outside of the enclosure wall; the top edge of the wrapping part forms a bend, the bend is curved in an arc, and the outer periphery of the wrapping part forms an outer peripheral sidewall, which is arranged inwardly along the direction from bottom to top of the wrapping part.

2. The upper plastic part structure for easy demolding as described in claim 1, characterized in that, The radius of the arc at the bend is greater than 0.8 mm.

3. The upper plastic part structure for easy demolding as described in claim 1, characterized in that, The package includes a top cover, the top of which is arranged in a flat shape.

4. The upper plastic part structure for easy demolding as described in claim 3, characterized in that, The wrapping part includes an outer peripheral covering part, and the top covering part and the outer peripheral covering part are bent and joined to form the bending position, and the outer peripheral sidewall is formed on the outer periphery of the outer peripheral covering part.

5. The upper plastic part structure for easy demolding as described in any one of claims 1 to 4, characterized in that, The enclosing wall is curved upward toward the pole hole and is enclosed in the upper plastic part.

6. The upper plastic part structure for easy demolding as described in claim 5, characterized in that, The enclosing wall has an outwardly curved surface that faces the wrapping part and is wrapped by the wrapping part from the outside in.

7. The upper plastic part structure for easy demolding as described in claim 5, characterized in that, The lower end of the enclosure wall is connected to the top cover plate, and the upper end of the enclosure wall is arranged facing the pole post to form an inner extension end; there is an upper annular gap between the inner extension end and the pole post, and the upper plastic part is embedded in the upper annular gap to form an inset part that fills the upper annular gap, and the inset part abuts against the outer periphery of the pole post and the upper end of the enclosure wall.

8. The upper plastic part structure for easy demolding as described in claim 7, characterized in that, The embedded portion extends to the bottom of the inner extension end to form a bottom ring, which abuts against the inner extension end from bottom to top.

9. The upper plastic part structure for easy demolding as described in claim 5, characterized in that, There is a central annular gap between the pole and the middle part of the enclosing wall. The outer periphery of the pole is wrapped with a rubber-coated ring, which fills the central annular gap and abuts against the middle part of the enclosing wall.

10. A battery cover, characterized in that, Includes the demolding-friendly upper plastic part structure as described in any one of claims 1 to 9.

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