Method for manufacturing a liquid-tight battery cover plate

Abstract

The present application relates to the technical field of battery cover plate, disclose a preparation method of liquid leakage prevention battery cover plate, comprising the following preparation steps: 1), preparation light cover plate and has installation ring, the top of installation ring is recessed and forms top ring groove;The bottom of light cover plate is provided with fixed ring;2), provide pole, the pole has upper section, lower section and middle section;Injection molding is formed on the outer periphery of lower section and forms outer plastic ring;3), the bottom of installation ring is arranged sealing ring;4), the fixed ring is bent and forms bending ring and presses the outer plastic ring;5), injection molding is formed in top ring groove and forms upper plastic ring;Upper plastic ring extends to middle interval and forms middle filling ring;Middle filling ring extends to lower interval and forms lower filling ring, and lower filling ring and upper plastic ring hold installation ring up and down.

Description

Technical Field

[0001] This invention relates to the technical field of battery cover plates, and more specifically, to a method for preparing a leak-proof battery cover plate. Background Technology

[0002] The battery cover is a key component of the battery. It is placed on the battery casing and is used to seal the electrolyte inside the battery.

[0003] Battery covers typically have terminals that penetrate them. After the terminals penetrate the battery cover, there is a gap at the connection between the terminals and the battery cover. If the gap is not reliably sealed during the manufacturing process, the electrolyte inside the battery will leak out along the gap, which will not only affect the battery's performance but also pose a safety hazard.

[0004] In existing manufacturing methods, a sealing element is usually placed between the terminal post and the battery cover plate, and then the sealing element is pressed tightly by mechanical means such as riveting or locking to seal the gap between the terminal post and the battery cover plate.

[0005] However, the degree of compression of the seal depends on the pressure of the riveting or locking process, and the actual compression is difficult to control precisely. The seal is often difficult to compress fully, and the gap between the terminal and the battery cover is not completely sealed, making the battery cover prone to leakage during use. Summary of the Invention

[0006] The purpose of this invention is to provide a method for preparing a leak-proof battery cover, which aims to solve the problem of easy leakage of battery covers in the prior art.

[0007] This invention is achieved through a method for preparing a leak-proof battery cover, comprising the following preparation steps: 1) Prepare an optical cover plate, wherein the optical cover plate has an annularly arranged mounting ring, the mounting ring surrounds to form an electrode hole, the top of the mounting ring is recessed to form an annularly arranged top annular groove, the top annular groove is arranged around the circumference of the electrode hole; The bottom of the light cover plate is provided with a fixing ring, which encloses and forms a fixing area. The top ring groove, the pole hole and the fixing area are connected sequentially from top to bottom. 2) Provide an electrode post, wherein the upper part of the electrode post has an upper section, the lower part of the electrode post has a lower section, and the middle part of the electrode post has a middle section, wherein the middle section is located between the upper section and the lower section; an outer plastic ring is injection molded to form the outer periphery of the lower section; 3) A sealing ring is arranged at the bottom of the mounting ring, and the sealing ring is arranged around the periphery of the pole hole; the pole is passed through the pole hole from bottom to top, the upper section is inserted in the top annular groove; the middle section is inserted in the pole hole, and a middle gap is formed between the middle section and the mounting ring. The lower section is located in a fixed area, and the top of the lower section abuts against the sealing ring from bottom to top. There is a lower gap between the top of the lower section and the bottom of the mounting ring. The top ring groove, the middle gap and the lower gap are connected sequentially from top to bottom. 4) Bend the fixed ring upward to form a bent ring. The bent ring presses against the outer plastic ring from bottom to top and applies an upward pressing force to the outer plastic ring so that the lower section presses against the sealing ring from bottom to top and elastically compresses and deforms it. 5) An upper plastic ring is formed by injection molding in the top annular groove, and the upper plastic ring wraps around the outer periphery of the upper section; the upper plastic ring extends to the middle interval to form a middle filling ring, and the middle filling ring wraps around the outer periphery of the middle section; the middle filling ring extends to the lower interval to form a lower filling ring, and the lower filling ring and the upper plastic ring clamp and install the ring.

[0008] Furthermore, in the preparation step 1), the outer periphery of the top annular groove has an outer peripheral wall, and the outer peripheral wall is arranged inclined outward along the direction from bottom to top of the top annular groove; in the preparation step 5), the outer periphery of the upper plastic ring abuts against the outer peripheral wall and is integrated with the outer peripheral wall.

[0009] Furthermore, in the preparation step 5), the top of the upper plastic ring is arranged flush with the top of the light cover plate.

[0010] Furthermore, in preparation step 2), the diameter of the upper section is smaller than the diameter of the middle section, and an upper step groove is formed between the upper section and the middle section, which is arranged to face upwards; in preparation step 5), the upper plastic ring is embedded and filled in the upper step groove to form an upper embedded ring, and the upper embedded ring and the lower filling ring are arranged to extend away from each other.

[0011] Furthermore, in the preparation step 2), the upper section extends upward to form a top section connected to the busbar. The diameter of the top section is smaller than that of the upper section. An upward-open top step groove is formed between the top section and the upper section. The top step groove is left open and vacant.

[0012] Furthermore, in preparation step 2), the outer plastic ring includes a bottom section abutting against the bottom of the lower section and an outer peripheral section abutting against the outer periphery of the lower section; in preparation step 3), when the lower section is placed in the fixed area, the outer peripheral section abuts against the fixed ring; in preparation step 4), the bending ring presses against the bottom section from bottom to top, applying an upward pressing force to the bottom section, so that the lower section presses against the sealing ring from bottom to top and elastically compresses and deforms.

[0013] Furthermore, in the preparation step 3), the inner side of the sealing ring has an inner ring, the outer side of the sealing ring has an outer ring, and the outer ring and the fixing ring are arranged at intervals; the top of the inner ring is fixedly connected to the bottom of the mounting ring, and the outer ring is movably arranged. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the sealing ring undergoes longitudinal elastic compression deformation, the inner ring is fixed laterally, and the outer ring extends laterally outward toward the fixed ring until the outer ring presses against the fixed ring.

[0014] Furthermore, in the preparation step 3), the lower part of the inner ring is provided with a non-elastic hard ring, the bottom of the hard ring is flush with the bottom of the inner ring, the top of the hard ring extends to the middle of the inner ring, and the bottom of the hard ring abuts against the top of the lower section. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the hard ring is fixed laterally, and the mounting ring presses against the upper part of the sealing ring for elastic compression deformation until the mounting ring abuts against the top of the hard ring. The hard ring restricts the sealing ring from undergoing inward lateral elastic deformation and guides the sealing ring to undergo outward lateral elastic deformation.

[0015] Furthermore, in the preparation step 2), the outer periphery of the outer peripheral segment is provided with a plurality of recessed guide grooves, and the plurality of guide grooves are arranged at intervals around the circumference of the outer peripheral segment; the guide grooves extend along the height direction of the outer peripheral segment, the top of the guide grooves penetrates the top of the outer peripheral ring, and the bottom of the guide grooves extends to the middle of the outer peripheral segment. In the preparation step 3), the outer periphery of the outer ring is covered with a soft rubber layer, the top of the soft rubber layer is fixedly connected to the top of the outer ring, and the bottom of the soft rubber layer is movably arranged. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the sealing ring elastically extends and deforms outward, and the soft rubber layer simultaneously extends and deforms outward until the soft rubber layer presses against the fixing ring. Then, the soft rubber layer is blocked by the fixing ring and elastically extends and deforms downward, embedding itself in the multiple guide grooves, and sealing the top of the outer peripheral section with the fixing ring.

[0016] Furthermore, in the preparation step 3), the outer ring is arranged inclined outward along the direction from bottom to top; the upper part of the outer ring is provided with a plurality of elastic curved pieces, and the plurality of curved pieces are arranged around the outer ring at intervals along the circumference of the outer ring. The upper end of the curved piece is fixedly connected to the top of the outer ring, the lower end of the curved piece is movably abutted against the middle of the outer ring, and the middle of the curved piece is bent outward away from the outer ring; the inner end of the curved piece is in the upper part of the soft rubber layer, and the lower part of the soft rubber layer is movably arranged between the outer ring and the curved piece. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the soft rubber layer extends and deforms outward in sync with the fixed ring, and then multiple curved pieces in the soft rubber layer bend and deform in sync, driving the soft rubber layer to extend and deform downward in sync. The soft rubber layer is blocked by the fixed ring and extends and deforms downward in sync.

[0017] Compared with existing technologies, the method for manufacturing a leak-proof battery cover provided by this invention solves the problem of easy leakage of battery covers by using a bending process to controllably compress the sealing ring and an injection molding process to integrally fill the gap and clamp the cover. Specifically, it has the following advantages: 1) By pressing the lower section with the bending ring and the outer plastic ring, the sealing ring is elastically compressed and deformed. Thus, the amount of compression of the sealing ring is determined by the bending stroke of the fixed ring. The amount of compression can be controlled during the manufacturing process. In this way, the gap between the lower section and the bottom of the mounting ring is filled by the sealing ring, which improves the leakage prevention performance of the battery cover.

[0018] 2) The upper plastic ring extends to form the middle filling ring, and is integrally injection molded with the lower filling ring. This reduces the seams between the upper plastic ring and the middle and lower filling rings, while also improving the overall strength of the upper plastic ring. This makes the gaps between the upper section, the middle section and the cover plate more tightly filled, further improving the leak-proof effect of the battery cover plate.

[0019] 3) The mounting ring is fixed between the upper plastic ring and the lower filling ring by clamping the mounting ring with the lower filling ring, thereby enhancing the structural stability and preventing the upper plastic ring from falling off and affecting the performance of the battery cover. Attached Figure Description

[0020] Figure 1 This is a schematic flowchart of the method for preparing the leak-proof battery cover provided by the present invention; Figure 2 This is a plan view of the light cover plate provided by the present invention; Figure 3 This is a planar schematic diagram of the pole provided by the present invention; Figure 4 This is a cross-sectional schematic diagram of the mounting ring and fixing ring provided by the present invention; Figure 5 This is a cross-sectional schematic diagram of the injection-molded upper plastic ring provided by the present invention; Figure 6 This is a cross-sectional schematic diagram of the complete assembly of the light cover plate provided by the present invention; Figure 7 This is a cross-sectional schematic diagram of the outer peripheral section provided by the present invention; Figure 8 This is a cross-sectional schematic diagram of the sealing ring provided by the present invention; In the figure: cover plate 100, upper plastic ring 101, middle filling ring 102, lower filling ring 103, upper embedded ring 104; 200 pole post, 201 upper section, 202 lower section, 203 middle section, 204 upper step groove, 205 top section, 206 top step groove, 207 middle interval, 208 lower interval. Mounting ring 300, top annular groove 301, outer peripheral wall 302; Fixed ring 400, bending ring 401; Outer plastic ring 500, bottom section 501, outer peripheral section 502, guide groove 503; Sealing ring 600, inner ring 601, outer ring 602, hard ring 603, soft rubber layer 604, bending piece 605. Detailed Implementation

[0021] 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.

[0022] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] 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 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 drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figures 1-8 The image shows a preferred embodiment of the present invention.

[0025] A method for preparing a leak-proof battery cover includes the following steps: 1) Prepare an optical cover plate 100. The optical cover plate 100 has an annularly arranged mounting ring 300. The mounting ring 300 surrounds and forms an electrode hole. The top of the mounting ring 300 is recessed to form an annularly arranged top annular groove 301. The top annular groove 301 is arranged around the circumference of the electrode hole. The bottom of the light cover plate 100 is provided with a fixing ring 400, which encloses and forms a fixing area. The top ring groove 301, the pole hole and the fixing area are connected sequentially from top to bottom. 2) Provide an electrode post 200, the upper part of the electrode post 200 has an upper section 201, the lower part of the electrode post 200 has a lower section 202, and the middle part of the electrode post 200 has a middle section 203, the middle section 203 being located between the upper section 201 and the lower section 202; an outer plastic ring 500 is injection molded to the outer periphery of the lower section 202; 3) A sealing ring 600 is arranged at the bottom of the mounting ring 300, and the sealing ring 600 is arranged around the periphery of the pole hole; the pole 200 is passed through the pole hole from bottom to top, the upper section 201 is inserted in the top annular groove 301; the middle section 203 is inserted in the pole hole, and a middle gap 207 is formed between the middle section 203 and the mounting ring 300; The lower section 202 is located in the fixed area. The top of the lower section 202 abuts against the sealing ring 600 from bottom to top. There is a lower gap 208 between the top of the lower section 202 and the bottom of the mounting ring 300. The top annular groove 301, the middle gap 207 and the lower gap 208 are connected sequentially from top to bottom. 4) Bend the fixed ring 400 upward to form a bent ring 401. The bent ring 401 presses against the outer plastic ring 500 from bottom to top and applies an upward pressing force to the outer plastic ring 500 so that the lower section 202 presses against the sealing ring 600 from bottom to top and elastically compresses and deforms. 5) An upper plastic ring 101 is injection molded in the top annular groove 301, and the upper plastic ring 101 wraps around the outer periphery of the upper section 201; the upper plastic ring 101 extends into the middle interval 207 to form a middle filling ring 102, and the middle filling ring 102 wraps around the outer periphery of the middle section 203; the middle filling ring 102 extends into the lower interval 208 to form a lower filling ring 103, and the lower filling ring 103 and the upper plastic ring 101 clamp the mounting ring 300.

[0026] The above-mentioned method for manufacturing a leak-proof battery cover solves the problem of easy leakage of battery covers by using a bending process to controllably compress the sealing ring 600 and an injection molding process to integrally fill the gap and clamp the cover. Specifically, the method has the following advantages: 1) By pressing the lower section 202 against the outer plastic ring 500 through the bending ring 401, the sealing ring 600 is elastically compressed and deformed; thus, the compression amount of the sealing ring 600 is determined by the bending stroke of the fixing ring 400, and the compression amount is controllable during the manufacturing process. In this way, the gap between the lower section 202 and the bottom of the mounting ring 300 is filled by the sealing ring 600, which improves the leakage prevention performance of the battery cover.

[0027] 2) The upper plastic ring 101 extends to form the middle filling ring 102, and is integrally injection molded with the lower filling ring 103. This reduces the gaps in the upper plastic ring 101 itself, while also improving the overall strength of the upper plastic ring 101. This makes the gaps between the upper section 201, the middle section 203 and the cover plate more tightly filled, further improving the leak-proof effect of the battery cover plate.

[0028] 3) The mounting ring 300 is clamped between the lower filling ring 103 and the upper plastic ring 101, so that the upper plastic ring 101 is embedded and fixed in the mounting ring 300, which enhances the structural stability and prevents the upper plastic ring 101 from falling off and affecting the performance of the battery cover.

[0029] In this embodiment, the upper plastic ring 101 can be injection molded from PPS (polyphenylene sulfide) material. PPS is a high-performance semi-crystalline thermoplastic with high temperature resistance, insulation and conductivity.

[0030] In the manufacturing process of the leak-proof battery cover, the upper plastic ring 101 plays a role in insulation and conductivity. In the force transmission, the compressive force of the sealing ring 600 is not transmitted to the upper plastic ring 101. Therefore, the sealing ring 600 can independently achieve the lower sealing. In this way, even without the use of PPS material, the battery cover will not leak.

[0031] As an extended embodiment, in preparation step 1), the outer periphery of the top annular groove 301 has an outer peripheral wall 302, which is arranged outwardly along the direction from bottom to top of the top annular groove 301; in preparation step 5), the outer periphery of the upper plastic ring 101 abuts against the outer peripheral wall 302 and is integrated with the outer peripheral wall 302.

[0032] With the outer peripheral wall 302 arranged outward at an angle, the outer periphery of the upper plastic ring 101 abuts against the inclined outer peripheral wall 302, forming a fit that is narrow at the top and wide at the bottom, preventing the upper plastic ring 101 from coming off upward; subsequently, the upper plastic ring 101 and the outer peripheral wall 302 are integrated into one piece, making the connection between the upper plastic ring 101 and the outer peripheral wall 302 more secure.

[0033] As an extended embodiment, in preparation step 5), the top of the upper plastic ring 101 is arranged flush with the top of the light cover plate 100.

[0034] During the injection molding process, the top of the upper plastic ring 101 after injection molding is flush with the top of the cover plate 100, so that the surface of the cover plate 100 is flat, which makes it easier to attach an insulating film to the surface of the cover plate 100 in subsequent processes.

[0035] As an extended embodiment, in preparation step 2), the diameter of the upper segment 201 is smaller than the diameter of the middle segment 203, and an upper step groove 204 is formed between the upper segment 201 and the middle segment 203, which is arranged to face upwards; in preparation step 5), the upper plastic ring 101 is embedded and filled into the upper step groove 204 to form an upper embedded ring 104, and the upper embedded ring 104 and the lower filling ring 103 are arranged to extend away from each other.

[0036] In this way, the upper plastic ring 101 is fitted with the upper embedded ring 104 at the transition between the upper section 201 and the middle section 203, thereby increasing the bonding area between the upper plastic ring 101 and the pole post 200. Moreover, the upper stepped groove 204 is open upwards, and the upper plastic ring 101 forms an upward blocking after filling it, preventing the upper plastic ring 101 from shifting downwards relative to the pole post 200.

[0037] As an extended embodiment, in preparation step 2), the upper section 201 extends upward to form a top section 205 connected to the busbar. The diameter of the top section 205 is smaller than the diameter of the upper section 201. A top step groove 206 is formed between the top section 205 and the upper section 201, and the top step groove 206 is left open.

[0038] The top section 205 has a smaller diameter than the upper section 201. The top step groove 206 makes the top section 205 protrude relative to the upper section 201. The top step groove 206 is open and unopened, so that the top section 205 is not wrapped by the upper plastic ring 101 and is exposed, which facilitates the connection of the top section 205 to the busbar.

[0039] As an extended embodiment, in preparation step 2), the outer plastic ring 500 includes a bottom section 501 that abuts against the bottom of the lower section 202 and an outer peripheral section 502 that abuts against the outer periphery of the lower section 202; in preparation step 3), after the lower section 202 is placed in the fixed area, the outer peripheral section 502 abuts against the fixed ring 400; in preparation step 4), the bent ring 401 presses against the bottom section 501 from bottom to top, applying an upward pressing force to the bottom section 501, so that the lower section 202 presses against the sealing ring 600 from bottom to top and elastically compresses and deforms.

[0040] The bottom segment 501 and the outer peripheral segment 502 abut against the bottom and outer periphery of the lower segment 202 respectively, covering the lower segment 202 from two directions and increasing the stability of the lower segment 202.

[0041] At the same time, the outer peripheral section 502 abuts against the fixed ring 400, so that the outer side of the outer plastic ring 500 is supported by the fixed ring 400. In this way, the bent ring 401 presses against the bottom section 501, and the pressure is transmitted through the bottom section 501 to the lower section 202. The lower section 202 presses upward against the sealing ring 600 and elastically compresses and deforms it.

[0042] As an extended embodiment, in preparation step 3), the inner side of the sealing ring 600 has an inner ring 601, and the outer side of the sealing ring 600 has an outer ring 602, with the outer ring 602 and the fixing ring 400 arranged at intervals; the top of the inner ring 601 is fixedly connected to the bottom of the mounting ring 300, and the outer ring 602 is movably arranged. In step 4), during the elastic compression deformation of the sealing ring 600, the sealing ring 600 undergoes longitudinal elastic compression deformation, the inner ring 601 is fixed laterally, and the outer ring 602 extends laterally outward toward the fixed ring 400 until the outer ring 602 presses against the fixed ring 400.

[0043] The inner ring 601 is fixedly connected to the bottom of the mounting ring 300 by the top of the inner ring 601. The inner side of the sealing ring 600 remains fixed during elastic compression, preventing the sealing ring 600 from shifting as a whole.

[0044] Meanwhile, the outer ring 602 is movably arranged, and when elastically compressed, the outer ring 602 extends outward to fill the gap between the outer ring 602 and the fixed ring 400, so that a seal is formed on the outside of the sealing ring 600; in this way, the inner ring 601 is fixed and movably engaged with the outer ring 602, and the elastic deformation of the sealing ring 600 is guided outward, so that the deformation direction is controllable.

[0045] As an extended embodiment, in preparation step 3), the lower part of the inner ring 601 is provided with a non-elastic hard ring 603, the bottom of the hard ring 603 is flush with the bottom of the inner ring 601, the top of the hard ring 603 extends to the middle of the inner ring 601, and the bottom of the hard ring 603 abuts against the top of the lower segment 202. In step 4), during the elastic compression deformation of the sealing ring 600, the hard ring 603 is fixed laterally, and the mounting ring 300 presses against the upper part of the sealing ring 600 for elastic compression deformation until the mounting ring 300 abuts against the top of the hard ring 603. The hard ring 603 restricts the inward lateral elastic deformation of the sealing ring 600 and guides the outward lateral elastic deformation of the sealing ring 600.

[0046] In this way, the sealing ring 600 fills the gap between itself and the retaining ring 400 outwards. After the mounting ring 300 abuts against the top of the rigid ring 603, the rigid ring 603 provides support for the upper part of the sealing ring 600, preventing the upper part of the sealing ring 600 from being excessively compressed.

[0047] As an extended embodiment, in preparation step 2), the outer periphery of the outer peripheral segment 502 is provided with a plurality of recessed guide grooves 503, which are arranged around the outer peripheral segment 502 at intervals in the circumferential direction; the guide grooves 503 extend along the height direction of the outer peripheral segment 502, the top of the guide grooves 503 penetrates the top of the outer peripheral ring, and the bottom of the guide grooves 503 extends to the middle of the outer peripheral segment 502; In preparation step 3), the outer periphery of the outer ring 602 is covered with a soft rubber layer 604, the top of the soft rubber layer 604 is fixedly connected to the top of the outer ring 602, and the bottom of the soft rubber layer 604 is movably arranged. In step 4), during the elastic compression deformation of the sealing ring 600, the sealing ring 600 elastically extends and deforms outward, and the soft rubber layer 604 simultaneously extends and deforms outward until the soft rubber layer 604 presses against the fixing ring 400. Then, the soft rubber layer 604 is blocked by the fixing ring 400 and elastically extends and deforms downward, embedding itself in multiple guide grooves 503, and sealing the top of the outer peripheral section 502 with the fixing ring 400.

[0048] After being blocked by the fixing ring 400, the soft rubber layer 604 elastically extends and deforms downwards to embed itself into multiple guide grooves 503. The guide grooves 503 position the soft rubber layer 604, and the soft rubber layer 604 is fixed in the guide grooves 503.

[0049] Furthermore, after the soft rubber layer 604 is embedded in the guide groove 503, it seals the top of the outer peripheral section 502 with the fixing ring 400, so that the gap between the outer peripheral section 502 and the fixing ring 400 is filled by the soft rubber layer 604.

[0050] In this way, multiple guide grooves 503 are spaced around the outer peripheral section 502 in the circumferential direction, and the soft rubber layer 604 forms multiple embedding points in the circumferential direction, thereby enhancing the continuity of the seal.

[0051] As an extended embodiment, in preparation step 3), the outer ring 602 is arranged outwardly at an angle from bottom to top; the upper part of the outer ring 602 is provided with a plurality of elastic curved pieces 605, and the plurality of curved pieces 605 are arranged around the outer ring 602 at circumferential intervals. The upper end of the curved piece 605 is fixedly connected to the top of the outer ring 602, the lower end of the curved piece 605 is movably abutted against the middle of the outer ring 602, and the middle of the curved piece 605 is bent and protruded outward away from the outer ring 602; the inner end of the curved piece 605 is in the upper part of the soft rubber layer 604, and the lower part of the soft rubber layer 604 is movably arranged between the outer ring 602. In step 4), during the elastic compression deformation of the sealing ring 600, the soft rubber layer 604 simultaneously extends outward and deforms to press against the fixing ring 400. Then, multiple bent pieces 605 in the soft rubber layer 604 simultaneously bend and deform, driving the soft rubber layer 604 to extend downward elastically. The soft rubber layer 604 is blocked by the fixing ring 400 and extends downward elastically.

[0052] By arranging the outer ring 602 outward at an angle, the deformation of the outer ring 602 as it extends outward increases when the sealing ring 600 is elastically compressed, and the soft rubber layer 604 extends outward simultaneously to press against the fixing ring 400.

[0053] After the soft rubber layer 604 presses against the fixing ring 400, the bending piece 605 bends and deforms synchronously. The bending deformation of the bending piece 605 drives the soft rubber layer 604 to extend downward, which enhances the force of the soft rubber layer 604 extending and deforming downward.

[0054] Furthermore, the inner end of the bending piece 605 is located in the upper part of the soft rubber layer 604, and the bending deformation of the bending piece 605 is directly transmitted to the soft rubber layer 604, making the transmission of driving force to the soft rubber layer 604 more direct.

[0055] In this way, the middle part of the bending piece 605 bends outward from the outer ring 602, and the bending piece 605 has a large amount of deformation when it is bent, which increases the driving force on the soft rubber layer 604.

[0056] 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 method for preparing a leak-proof battery cover, characterized in that, The preparation steps include the following: 1) Prepare an optical cover plate, wherein the optical cover plate has an annularly arranged mounting ring, the mounting ring surrounds to form an electrode hole, the top of the mounting ring is recessed to form an annularly arranged top annular groove, the top annular groove is arranged around the circumference of the electrode hole; The bottom of the light cover plate is provided with a fixing ring, which encloses and forms a fixing area. The top ring groove, the pole hole and the fixing area are connected sequentially from top to bottom. 2) Provide an electrode post, wherein the upper part of the electrode post has an upper section, the lower part of the electrode post has a lower section, and the middle part of the electrode post has a middle section, wherein the middle section is located between the upper section and the lower section; an outer plastic ring is injection molded to form the outer periphery of the lower section; 3) A sealing ring is arranged at the bottom of the mounting ring, and the sealing ring is arranged around the periphery of the pole hole; the pole is passed through the pole hole from bottom to top, the upper section is inserted in the top annular groove; the middle section is inserted in the pole hole, and a middle gap is formed between the middle section and the mounting ring. The lower section is located in a fixed area, and the top of the lower section abuts against the sealing ring from bottom to top. There is a lower gap between the top of the lower section and the bottom of the mounting ring. The top ring groove, the middle gap and the lower gap are connected sequentially from top to bottom. 4) Bend the fixed ring upward to form a bent ring. The bent ring presses against the outer plastic ring from bottom to top and applies an upward pressing force to the outer plastic ring so that the lower section presses against the sealing ring from bottom to top and elastically compresses and deforms it. 5) An upper plastic ring is formed by injection molding in the top annular groove, and the upper plastic ring wraps around the outer periphery of the upper section; the upper plastic ring extends to the middle interval to form a middle filling ring, and the middle filling ring wraps around the outer periphery of the middle section; the middle filling ring extends to the lower interval to form a lower filling ring, and the lower filling ring and the upper plastic ring clamp and install the ring.

2. The method for preparing a leak-proof battery cover as described in claim 1, characterized in that, In preparation step 1), the outer periphery of the top annular groove has an outer peripheral wall, and the outer peripheral wall is arranged outwardly inclined along the direction from bottom to top of the top annular groove; in preparation step 5), the outer periphery of the upper plastic ring abuts against the outer peripheral wall and is integrated with the outer peripheral wall.

3. The method for preparing a leak-proof battery cover as described in claim 1, characterized in that, In preparation step 5), the top of the upper plastic ring is arranged flush with the top of the light cover plate.

4. The method for preparing a leak-proof battery cover as described in claim 1, characterized in that, In preparation step 2), the diameter of the upper section is smaller than the diameter of the middle section, and an upper step groove is formed between the upper section and the middle section, which is arranged to face upwards; in preparation step 5), the upper plastic ring is embedded and filled in the upper step groove to form an upper embedded ring, and the upper embedded ring and the lower filling ring are arranged to extend away from each other.

5. The method for preparing a leak-proof battery cover as described in claim 1, characterized in that, In the preparation step 2), the upper section extends upward to form a top section connected to the busbar. The diameter of the top section is smaller than that of the upper section. A top step groove is formed between the top section and the upper section, and the top step groove is left open and vacant.

6. The method for preparing a leak-proof battery cover as described in claim 1, characterized in that, In preparation step 2), the outer plastic ring includes a bottom section that abuts against the bottom of the lower section and an outer peripheral section that abuts against the outer periphery of the lower section; in preparation step 3), when the lower section is placed in the fixed area, the outer peripheral section abuts against the fixed ring; in preparation step 4), the bending ring presses against the bottom section from bottom to top, applying an upward pressing force to the bottom section so that the lower section presses against the sealing ring from bottom to top and elastically compresses and deforms.

7. The method for preparing a leak-proof battery cover as described in any one of claims 1-6, characterized in that, In the preparation step 3), the inner side of the sealing ring has an inner ring, the outer side of the sealing ring has an outer ring, and the outer ring and the fixing ring are arranged at intervals; the top of the inner ring is fixedly connected to the bottom of the mounting ring, and the outer ring is movably arranged. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the sealing ring undergoes longitudinal elastic compression deformation, the inner ring is fixed laterally, and the outer ring extends laterally outward toward the fixed ring until the outer ring presses against the fixed ring.

8. The method for preparing a leak-proof battery cover as described in claim 7, characterized in that, In the preparation step 3), the lower part of the inner ring is provided with a non-elastic hard ring, the bottom of the hard ring is flush with the bottom of the inner ring, the top of the hard ring extends to the middle of the inner ring, and the bottom of the hard ring abuts against the top of the lower section. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the hard ring is fixed laterally, and the mounting ring presses against the upper part of the sealing ring for elastic compression deformation until the mounting ring abuts against the top of the hard ring. The hard ring restricts the sealing ring from undergoing inward lateral elastic deformation and guides the sealing ring to undergo outward lateral elastic deformation.

9. The method for preparing a leak-proof battery cover as described in claim 7, characterized in that, In the preparation step 2), the outer periphery of the outer peripheral segment is provided with a plurality of recessed guide grooves, which are arranged at intervals around the outer peripheral segment in the circumferential direction; the guide grooves extend along the height direction of the outer peripheral segment, the top of the guide grooves penetrates the top of the outer peripheral ring, and the bottom of the guide grooves extends to the middle of the outer peripheral segment. In the preparation step 3), the outer periphery of the outer ring is covered with a soft rubber layer, the top of the soft rubber layer is fixedly connected to the top of the outer ring, and the bottom of the soft rubber layer is movably arranged. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the sealing ring elastically extends and deforms outward, and the soft rubber layer simultaneously extends and deforms outward until the soft rubber layer presses against the fixing ring. Then, the soft rubber layer is blocked by the fixing ring and elastically extends and deforms downward, embedding itself in the multiple guide grooves, and sealing the top of the outer peripheral section with the fixing ring.

10. The method for preparing a leak-proof battery cover as described in claim 7, characterized in that, In the preparation step 3), the outer ring is arranged inclined outward along the direction from bottom to top; the upper part of the outer ring is provided with a plurality of elastic curved pieces, and the plurality of curved pieces are arranged around the outer ring at intervals along the circumference of the outer ring. The upper end of the curved piece is fixedly connected to the top of the outer ring, the lower end of the curved piece is movably abutted against the middle of the outer ring, and the middle of the curved piece is bent outward away from the outer ring; the inner end of the curved piece is in the upper part of the soft rubber layer, and the lower part of the soft rubber layer is movably arranged between the outer ring and the curved piece. In step 4) of the preparation process, during the elastic compression deformation of the sealing ring, the soft rubber layer extends and deforms outward in sync with the fixed ring, and then multiple curved pieces in the soft rubber layer bend and deform in sync, driving the soft rubber layer to extend and deform downward in sync. The soft rubber layer is blocked by the fixed ring and extends and deforms downward in sync.

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