Battery cover plate assembly method based on injection molding to form upper plastic part

Abstract

The application relates to the technical field of a battery cover plate and discloses a battery cover plate assembling method based on injection molding to form an upper plastic part, which comprises the following assembling method: 1) providing a top cover sheet, the top cover sheet being provided with a pole hole and an enclosing wall; 2) providing a pole, the upper part of the pole being provided with an upper section, an outer peripheral wall and a lower section, the outer peripheral wall being wrapped with a plastic insert, and the top cover sheet being provided with an annular part; a sealing ring is arranged on the annular part, and the outer peripheral wall presses against the sealing ring; 3) bending the enclosing wall to form a bent section, and the bent section presses against the plastic insert; 4) injection molding to form an upper plastic part, the upper plastic part being wrapped around the enclosing wall and wrapping the upper section, so that the pole and the enclosing wall are combined into an integrated whole; and 5) arranging a lower plastic part, the lower plastic part being inserted into the top cover sheet; after the pole is arranged in the pole hole, the outer peripheral wall and the annular part hold the sealing ring in a clamping mode, and the upper plastic part wraps the outer peripheral wall and the upper section, so that the pole and the top cover sheet are stably connected into an integrated whole, the structure is simple, and the assembling process is simplified.

Description

Technical Field

[0001] This invention patent relates to the technical field of battery cover plates, and more specifically, to a battery cover plate assembly method based on injection molding of the upper plastic part. Background Technology

[0002] The battery cover is an important component of the battery. It includes a top cover plate, through which terminals are inserted. These terminals are connected to the battery cells and to external devices, thus enabling the battery to supply power.

[0003] The top cover plate has a terminal post inserted through it. After the terminal post passes through the terminal post hole, it needs to be fixed to the top cover plate. In the existing technology, a relatively complex structure needs to be set on the top cover plate to fix the terminal post to the top cover plate to maintain the stability of the battery cover plate. This results in a complex structure of the battery cover plate and a relatively cumbersome assembly process. Summary of the Invention

[0004] The purpose of this invention is to provide a battery cover assembly method based on injection molding of the upper plastic part, which aims to solve the problem of the cumbersome battery cover assembly in the prior art.

[0005] This invention is implemented as follows: a battery cover assembly method based on injection molding of an upper plastic part includes the following assembly steps:

[0006] 1) Provide a top cover plate, wherein the top cover plate has pole holes arranged vertically through the pole holes, and the top cover plate is provided with an enclosing wall, which is arranged around the pole holes in a circumferential direction, and the enclosing wall encloses and forms an enclosing area.

[0007] 2) Provide an electrode post, the upper part of which has an upper section, the lower part of which has a lower section, and the middle part of which protrudes outward to form an outer peripheral wall, the outer peripheral wall being arranged around the circumference of the electrode post.

[0008] The outer peripheral wall is wrapped with a plastic insert, and the top cover has an annular portion arranged in a ring. The annular portion is located at the bottom of the enclosed area, and the annular portion encloses to form the pole hole.

[0009] A sealing ring is placed on the annular portion, the lower section is passed through the pole hole, the upper section is inserted into the enclosing area, the outer peripheral wall presses against the sealing ring from top to bottom, and the plastic insert abuts against the enclosing wall.

[0010] 3) The upper part of the enclosing wall is bent toward the enclosing area to form a curved section; there is an upper gap between the curved section and the upper section, an upper and lower gap between the curved section and the outer peripheral wall, a middle gap between the outer peripheral wall and the enclosing wall, and a lower gap between the lower section and the inner sidewall of the pole hole; the plastic insert fills the middle gap, and the curved section presses against the plastic insert from top to bottom;

[0011] 4) An upper plastic part is injection molded on the top cover plate and arranged around the circumference of the enclosure wall; the upper plastic part wraps around the outer periphery of the enclosure wall and fills the upper gap, wraps around the outer periphery of the upper section, the upper plastic part abuts against the top of the outer peripheral wall, and the upper plastic part combines the pole post and the enclosure wall into one piece.

[0012] 5) A lower plastic part is arranged at the bottom of the top cover plate. The lower plastic part is movably inserted into the top cover plate from bottom to top and is fixed relative to the top cover plate.

[0013] Furthermore, in the assembly step 1), the top cover is integrally stamped.

[0014] Furthermore, in the assembly step 1), after the top cover piece is integrally stamped, the enclosing wall is arranged perpendicularly to the top cover piece, and the enclosing wall is upright;

[0015] In assembly step 3), after the upper part of the enclosure wall bends toward the enclosure area to form a curved section, the enclosure wall is arranged in a curved shape.

[0016] Furthermore, in assembly step 2), the outer periphery of the upper section is formed with a plurality of longitudinally arranged grooves, which are arranged around the upper section at intervals in the circumferential direction; in assembly step 4), the upper plastic part is embedded in the longitudinal grooves and integrated with the upper section.

[0017] Furthermore, in the assembly step 2), an outer ring extends outward from the outer periphery of the sealing ring, the outer ring is arranged around the circumference of the sealing ring, the outer ring abuts against the enclosing wall, and there is an elastic gap between the outer ring and the annular portion.

[0018] In assembly step 4), the upper plastic part presses against the outer ring from top to bottom, so that the outer ring is compressed and deformed toward the elastic interval.

[0019] Furthermore, in assembly step 3), the end of the curved section has an end head, the end head is arranged toward the upper section, and forms the upper gap with the upper section; in assembly step 4), the upper plastic part extends into the upper and lower gaps and wraps around the end head.

[0020] Furthermore, in assembly step 2), the plastic insert bends upward and extends to abut against the top of the outer peripheral wall to form a top section, the top section fills the upper and lower gaps, and the top section is horizontally joined with the upper plastic part; in assembly step 3), during the process of bending the enclosure wall to form a curved section, until the formed curved section presses against the plastic insert.

[0021] Furthermore, in the assembly step 3), before bending the enclosure wall to form the bent section, the top cover is kept in a fixed state, the pole is pressed downwards to compress and deform the outer peripheral wall against the sealing ring, and after the plastic insert is compressed and deformed towards the elastic interval against the outer ring, the enclosure wall is bent until the bent section is pressed against the plastic insert.

[0022] Furthermore, in the assembly step 5), the lower plastic part has a raised ring, and the raised ring is embedded in the lower gap from bottom to top so that the lower plastic part is fixed relative to the top cover plate.

[0023] Furthermore, in assembly step 2), the plastic insert has a horizontal section that abuts against the top of the outer peripheral wall, and the end of the horizontal section is provided with a recessed groove; the plastic insert has an outer side wall facing the enclosing wall, and a plurality of protrusions are provided on the outer side wall, and adjacent protrusions are arranged in a laterally staggered manner along the bottom-up direction of the plastic insert; an open-loop annular groove is formed between the bottom of the protrusion and the outer side wall;

[0024] In assembly step 3), when the enclosing wall is bent, the protrusion abuts against the enclosing wall and forms an outer gap with the enclosing wall.

[0025] In assembly step 4), after the upper plastic part is injection molded on the top cover plate, the upper plastic part is embedded in the recessed groove, the upper plastic part fills the outer space, fills the annular groove, and wraps around the multiple protrusions.

[0026] Compared with the prior art, the battery cover assembly method based on injection molding of the upper plastic part provided by the present invention forms an outer peripheral wall on the outer periphery of the terminal post, and the top cover has an annular portion. A sealing ring is placed on the annular portion. When the terminal post is inserted into the terminal post hole, the outer peripheral wall and the annular portion clamp the sealing ring facing each other. By injection molding the upper plastic part on the top cover, the upper plastic part wraps around the outer peripheral wall and is embedded in the upper gap, wrapping the upper section, thereby making the terminal post and the top cover firmly connected as one. The structure is simple, and the structure of the battery cover formed is stable, simplifying the assembly process. Attached Figure Description

[0027] Figure 1 This is a schematic flowchart of the battery cover assembly method based on injection molding of the upper plastic part provided by the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of the battery cover assembly method based on injection molding of the upper plastic part provided by the present invention;

[0029] Figure 3 yes Figure 2 Enlarged diagram of point A in the diagram;

[0030] Figure 4 This is a three-dimensional exploded view of the battery cover assembly method based on injection molding of the upper plastic part provided by the present invention;

[0031] Figure 5 This is a cross-sectional schematic diagram of the plastic insert provided by the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 and not intended to limit the invention.

[0033] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0034] 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 invention, 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 accompanying drawings, they are only for the convenience of describing this invention 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 accompanying 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.

[0035] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0036] The battery cover assembly method based on injection molding of the upper plastic part includes the following assembly steps:

[0037] 1) Provide a top cover plate 200, which has pole post holes arranged vertically through the top cover plate 200. The top cover plate 200 is provided with an enclosing wall 400, which is arranged around the pole post holes in the circumference and encloses the enclosing area.

[0038] 2) Provide an electrode post 100, the upper part of the electrode post 100 has an upper section 101, the lower part of the electrode post 100 has a lower section 102, the middle part of the electrode post 100 protrudes outward to form an outer peripheral wall 103, the outer peripheral wall 103 is arranged around the circumference of the electrode post 100; a plastic insert 700 is wrapped on the outer peripheral wall 103, and the top cover plate 200 has an annular portion 201 arranged in a ring, the annular portion 201 is located at the bottom of the enclosed area, and the annular portion 201 encloses to form the electrode post hole;

[0039] A sealing ring 500 is placed on the annular portion 201, the lower section 102 is passed through the pole hole, the upper section 101 is inserted into the enclosing area, the outer peripheral wall 103 presses against the sealing ring 500 from top to bottom, and the plastic insert 700 abuts against the enclosing wall 400.

[0040] 3) The upper part of the enclosing wall 400 is bent toward the enclosing area to form a curved section. There is an upper gap between the curved section and the upper section 101, an upper and lower gap between the curved section and the outer peripheral wall 103, a middle gap between the outer peripheral wall 103 and the enclosing wall 400, and a lower gap 104 between the lower section 102 and the inner sidewall of the pole hole. The plastic insert 700 fills the middle gap, and the curved section presses against the plastic insert 700 from top to bottom.

[0041] 4) An upper plastic part 300 is injection molded on the top cover plate 200 and arranged around the periphery of the enclosure wall 400; the upper plastic part 300 wraps around the outer periphery of the enclosure wall 400 and fills the upper gap, wrapping the outer periphery of the upper section 101, and the upper plastic part 300 abuts against the top of the outer peripheral wall 103, and the upper plastic part 300 combines the pole post 100 and the enclosure wall 400 into one piece;

[0042] 5) A lower plastic part 600 is arranged at the bottom of the top cover plate 200. The lower plastic part 600 is movably inserted into the top cover plate 200 from bottom to top and is fixed relative to the top cover plate 200.

[0043] Compared with the prior art, the battery cover assembly method based on injection molding of the upper plastic part provided by the present invention has an outer peripheral wall 103 formed on the outer periphery of the terminal post 100, and a top cover plate 200 having an annular portion 201. A sealing ring 500 is placed on the annular portion 201. When the terminal post 100 passes through the terminal post hole, the outer peripheral wall 103 and the annular portion 201 clamp the sealing ring 500 facing each other. By injection molding the upper plastic part 300 on the top cover plate 200, the upper plastic part 300 wraps the outer peripheral wall 103 and is embedded in the upper gap, wrapping the upper section 101, thereby making the terminal post 100 and the top cover plate 200 firmly connected as one, with a simple structure and a stable structure of the battery cover plate, simplifying the assembly process.

[0044] In this embodiment, in assembly step 1), the top cover 200 is integrally stamped, which greatly simplifies the manufacturing process and improves assembly efficiency.

[0045] In this embodiment, in assembly step 1), after the top cover plate 200 is integrally stamped, the enclosing wall 400 is arranged perpendicularly to the top cover plate 200, and the enclosing wall 400 is upright; in assembly step 3), after the upper part of the enclosing wall 400 is bent towards the enclosing area to form a bent section, the enclosing wall 400 is arranged in a bent shape. This facilitates the insertion of the pole post 100 into the pole post hole, facilitates the arrangement of the sealing ring 500, and allows the outer peripheral wall 103 to press against the sealing ring 500. Furthermore, once the pole post 100 is positioned, the enclosing wall 400 is then bent.

[0046] In this embodiment, in assembly step 2), a plurality of longitudinally arranged longitudinal grooves 105 are formed on the outer periphery of the upper section 101, and the plurality of longitudinal grooves 105 are arranged around the upper section 101 at circumferential intervals; in assembly step 4), the upper plastic part 300 is embedded in the longitudinal grooves 105 and is integrated with the upper section 101.

[0047] In this way, after injection molding, the upper plastic part 300 is embedded in the longitudinal groove 105, which can be tightly connected with the upper section 101, so that the pole post 100 and the upper plastic part 300 are tightly connected, and the torsional resistance of the pole post 100 can be greatly improved.

[0048] In this embodiment, in assembly step 2), an outer ring 501 extends outward from the outer periphery of the sealing ring 500. The outer ring 501 is arranged around the circumference of the sealing ring 500. The outer ring 501 abuts against the enclosure wall 400. There is an elastic gap 502 between the outer ring 501 and the annular portion 201. In assembly step 4), the upper plastic part 300 presses against the outer ring 501 from top to bottom, so that the outer ring 501 is compressed and deformed toward the elastic gap 502.

[0049] By forming an elastic gap 502, the sealing ring 500 is compressed and deformed after being squeezed, so that the sealing ring 500 is more firmly placed between the outer peripheral wall 103 and the annular portion 201, and the sealing performance of the pole post 100 in the pole post hole is improved.

[0050] In this embodiment, in assembly step 3), the end of the curved section has an end head 401, which is arranged facing the upper section 101 and forms an upper gap with the upper section 101; in assembly step 4), the upper plastic part 300 extends into the upper and lower gaps and wraps around the end head 401. In this way, the upper plastic part 300 forms a curved wrap around the enclosing wall 400, so that the connection between the upper plastic part 300 and the enclosing wall 400 is stable.

[0051] In this embodiment, during assembly step 2), the plastic insert 700 bends upward and extends to abut against the top of the outer peripheral wall 103, forming a top section 701. The top section 701 fills the upper and lower gaps and is horizontally joined with the upper plastic part 300. Thus, when the pole post 100 passes through the pole post hole and bends downward to enclose the wall 400, the bending segment abuts against the plastic insert 700, achieving the bending positioning of the bending segment.

[0052] In this embodiment, in assembly step 3), before bending the enclosure wall 400 to form the bent section, the top cover 200 is kept in a fixed state, and the pole post 100 is pressed downward so that the outer peripheral wall 103 presses against the sealing ring 500 and compresses and deforms. After the plastic insert 700 presses against the outer ring 501 and compresses and deforms towards the elastic interval 502, the enclosure wall 400 is bent until the bent section is pressed against the plastic insert 700.

[0053] In this way, the pole post 100 is first pressed downwards so that the outer peripheral wall 103 presses against the sealing ring 500 and compresses and deforms to ensure sealing. Then, the enclosure wall 400 is bent, and the bent section formed after bending can press against the plastic insert 700 to keep the position of the pole post 100 fixed and to keep pressing against the sealing ring 500.

[0054] In this embodiment, during assembly step 5), the lower plastic part 600 has a raised ring 601. The raised ring 601 is inserted into the lower spacer 104 from bottom to top, so that the lower plastic part 600 and the top cover plate 200 are relatively fixed. In this way, a snap-fit ​​connection is formed between the lower plastic part 600 and the top cover plate 200, eliminating the need for welding, greatly simplifying the assembly process and improving assembly efficiency.

[0055] In this embodiment, in assembly step 2), the plastic insert 700 has a horizontal section 705 that abuts against the top of the outer peripheral wall 103, and the end of the horizontal section 705 is provided with a recessed groove 702; the plastic insert 700 has an outer side wall 706 facing the enclosing wall 400, and a plurality of protrusions 703 are provided on the outer side wall 706. Along the bottom-up direction of the plastic insert 700, adjacent protrusions 703 are arranged in a laterally staggered manner; an open-ring-shaped annular groove 704 is formed between the bottom of the protrusion 703 and the outer side wall 706.

[0056] In assembly step 3), when the enclosure wall 400 is bent, the protrusion 703 abuts against the enclosure wall 400 and forms an outer gap with the enclosure wall 400; in assembly step 4), after the upper plastic part 300 is injection molded on the top cover plate 200, the upper plastic part 300 is embedded in the recessed groove 702, the upper plastic part 300 fills the outer gap, fills the annular groove 704, and wraps around multiple protrusions 703.

[0057] The upper plastic part 300 is embedded in the recessed groove 702 to make the connection between the upper plastic part 300 and the plastic insert 700 more stable; by arranging multiple protrusions 703, an outer gap is formed between the plastic insert 700 and the enclosing wall 400. After the upper plastic part 300 is injection molded, the upper plastic part 300 can be inserted into the outer gap, filling the outer gap, enhancing the stability of the internal structure, and wrapping the protrusions 703 to make the connection between the upper plastic part 300 and the plastic insert 700 more stable.

[0058] In addition, by forming an annular groove 704 between the protrusion 703 and the outer side wall 706, the bonding stability between the upper plastic part 300 and the plastic insert 700 can be further enhanced; the annular groove 704 is an open ring shape, which makes it easy for the upper plastic part 300 to fill the annular groove 704, so that the bonding between the upper plastic part 300 and the protrusion 703 is stable.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery cover assembly method based on injection molding of an upper plastic part, characterized in that, The assembly process includes the following steps: 1) Provide a top cover plate, wherein the top cover plate has pole holes arranged vertically through the pole holes, and the top cover plate is provided with an enclosing wall, which is arranged around the pole holes in a circumferential direction, and the enclosing wall encloses and forms an enclosing area. 2) Provide an electrode post, the upper part of which has an upper section, the lower part of which has a lower section, and the middle part of which protrudes outward to form an outer peripheral wall, the outer peripheral wall being arranged around the circumference of the electrode post. The outer peripheral wall is wrapped with a plastic insert, and the top cover has an annular portion arranged in a ring. The annular portion is located at the bottom of the enclosed area, and the annular portion encloses to form the pole hole. A sealing ring is placed on the annular portion, the lower section is passed through the pole hole, the upper section is inserted into the enclosing area, the outer peripheral wall presses against the sealing ring from top to bottom, and the plastic insert abuts against the enclosing wall. 3) The upper part of the enclosing wall is bent toward the enclosing area to form a curved section; there is an upper gap between the curved section and the upper section, an upper and lower gap between the curved section and the outer peripheral wall, a middle gap between the outer peripheral wall and the enclosing wall, and a lower gap between the lower section and the inner sidewall of the pole hole; the plastic insert fills the middle gap, and the curved section presses against the plastic insert from top to bottom; 4) An upper plastic part is injection molded on the top cover plate and arranged around the circumference of the enclosure wall; the upper plastic part wraps around the outer periphery of the enclosure wall and fills the upper gap, wraps around the outer periphery of the upper section, the upper plastic part abuts against the top of the outer peripheral wall, and the upper plastic part combines the pole post and the enclosure wall into one piece. 5) A lower plastic part is arranged at the bottom of the top cover plate. The lower plastic part is movably inserted into the top cover plate from bottom to top and is fixed relative to the top cover plate. In assembly step 2), the plastic insert has a horizontal section that abuts against the top of the outer peripheral wall, and the end of the horizontal section is provided with a recessed groove; the plastic insert has an outer side wall facing the enclosing wall, and a plurality of protrusions are provided on the outer side wall, and adjacent protrusions are arranged in a laterally staggered manner along the bottom-up direction of the plastic insert; an open-loop annular groove is formed between the bottom of the protrusion and the outer side wall. In assembly step 3), when the enclosing wall is bent, the protrusion abuts against the enclosing wall and forms an outer gap with the enclosing wall. In assembly step 4), after the upper plastic part is injection molded on the top cover plate, the upper plastic part is embedded in the recessed groove, the upper plastic part fills the outer space, fills the annular groove, and wraps around the multiple protrusions.

2. The battery cover assembly method based on injection molding of the upper plastic part as described in claim 1, characterized in that, In assembly step 1), the top cover is integrally stamped.

3. The battery cover assembly method based on injection molding of the upper plastic part as described in claim 1, characterized in that, In the assembly step 1), after the top cover piece is integrally stamped, the enclosing wall is arranged perpendicularly to the top cover piece, and the enclosing wall is upright. In assembly step 3), after the upper part of the enclosure wall bends toward the enclosure area to form a curved section, the enclosure wall is arranged in a curved shape.

4. The battery cover assembly method based on injection molding of the upper plastic part as described in claim 1, characterized in that, In assembly step 2), the outer periphery of the upper section is formed with a plurality of longitudinally arranged grooves, which are arranged around the upper section at circumferential intervals; in assembly step 4), the upper plastic part is embedded in the longitudinal grooves and integrated with the upper section.

5. The battery cover assembly method based on injection molding of the upper plastic part as described in any one of claims 1 to 3, characterized in that, In assembly step 2), an outer ring extends outward from the outer periphery of the sealing ring. The outer ring is arranged around the circumference of the sealing ring and abuts against the enclosure wall. There is an elastic gap between the outer ring and the annular portion. In assembly step 4), the upper plastic part presses against the outer ring from top to bottom, so that the outer ring is compressed and deformed toward the elastic interval.

6. The battery cover assembly method based on injection molding of the upper plastic part as described in any one of claims 1 to 3, characterized in that, In assembly step 3), the end of the curved section has an end head, which is arranged toward the upper section and forms the upper gap with the upper section; in assembly step 4), the upper plastic part extends into the upper and lower gaps and wraps around the end head.

7. The battery cover assembly method based on injection molding of the upper plastic part as described in any one of claims 1 to 3, characterized in that, In assembly step 2), the plastic insert bends upward and extends to abut against the top of the outer peripheral wall to form a top section. The top section fills the upper and lower gaps and is horizontally joined with the upper plastic part. In assembly step 3), during the process of bending the enclosure wall to form a curved section, the curved section is pressed against the plastic insert.

8. The battery cover assembly method based on injection molding of the upper plastic part as described in claim 5, characterized in that, In assembly step 3), before bending the enclosure wall to form the bent section, the top cover is kept in a fixed state, and the pole is pressed downwards to compress and deform the outer peripheral wall against the sealing ring. After the plastic insert is compressed and deformed towards the elastic interval against the outer ring, the enclosure wall is bent until the bent section is pressed against the plastic insert.

9. The battery cover assembly method based on injection molding of the upper plastic part as described in any one of claims 1 to 3, characterized in that, In assembly step 5), the lower plastic part has a raised ring, and the raised ring is embedded in the lower gap from bottom to top so that the lower plastic part is fixed relative to the top cover plate.

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