High yield method of manufacturing battery cover plate

Abstract

The present application relates to the technical field of battery top cover, disclose a high yield preparation method of battery cover plate, including the following preparation steps: 1), stamping forms pole, pole has upper section, lower section, middle ring; 2), middle ring injection molding forms outer plastic ring including top section, outer peripheral section, bottom section; 3), provide top cover sheet and is equipped with pole hole, fixed ring, mounting ring and sealing ring; 4), the fixed ring is bent to form a bending ring; 5), top cover sheet injection molding forms upper plastic ring; 6), the bottom of top cover sheet is assembled with lower plastic plate;In preparation step 3), the sealing ring is provided with a soft rubber ring;In preparation step 4), when the sealing ring is elastically compressed and deformed, the sealing ring and the soft rubber ring extend towards the fixed ring simultaneously, and the soft rubber ring is blocked by the fixed ring and is extruded to be elastically deformed to fill the deformation gap;By setting the bottom ring groove and the bottom section embedded fixedly, and using the soft rubber ring to enhance the sealing compensation, the preparation yield of the battery cover plate is improved.

Description

Technical Field

[0001] This invention relates to the field of battery top cover technology, and more specifically, to a high-yield method for preparing battery cover plates. Background Technology

[0002] In the manufacturing process of battery cover plates, plastic parts are usually first injection molded on the terminals, then the terminals are assembled onto the battery cover plates, and the assembly of the battery cover plates is completed through processes such as bending and fixing, and secondary injection molding.

[0003] However, in the existing technology, the plastic parts on the terminals are connected to the terminals in a relatively simple way. This makes it easy for the plastic parts to fall off or shift from the terminals under the stress of subsequent bending, injection molding and other processes, resulting in a decrease in the yield of battery cover manufacturing.

[0004] Meanwhile, the sealing structure between the terminal block and the battery cover plate exhibits insufficient sealing performance and unstable sealing effect when subjected to pressure deformation, which also affects the manufacturing yield of the battery cover plate. Summary of the Invention

[0005] The purpose of this invention is to provide a high-yield method for manufacturing battery cover plates, aiming to solve the problem of low yield in the prior art for manufacturing battery cover plates.

[0006] This invention is achieved through a high-yield method for preparing battery cover plates, comprising the following preparation steps: 1) A stamped pole post is formed, wherein the upper part of the pole post has an upper section, the lower part of the pole post has a lower section, and the middle part of the pole post has a middle ring, wherein the middle ring is located between the upper section and the lower section; a bottom ring groove is formed at the bottom of the middle ring, and the bottom ring groove is arranged around the circumference of the middle ring. 2) An outer plastic ring is formed by injection molding in the middle ring, and the outer plastic ring wraps around the middle ring; the outer plastic ring includes a top section covering the top of the middle ring, an outer peripheral section covering the outer periphery of the middle ring, and a bottom section filling the bottom ring groove, wherein the ratio of the thickness of the bottom section to the length of the outer peripheral section is 3:5. 3) Provide a top cover plate, wherein the top cover plate has a vertically through pole hole, and the top cover plate has a longitudinally arranged fixing ring, which is arranged around the pole hole in the circumference to form a fixing area, and the fixing area is vertically aligned and connected to the pole hole. The top cover has a mounting ring formed at the bottom of the fixed area, and the mounting ring surrounds the pole hole; a sealing ring is provided on the mounting ring, the pole is inserted into the top cover, the lower section passes through the pole hole, the middle ring and the upper section are located in the fixed area, and the bottom of the middle ring abuts against the sealing ring; 4) The upper part of the fixed ring is bent downward to form a bent ring. The bent ring presses against the top section from top to bottom, and an upper gap is formed between the bent ring and the upper section. The bent ring applies a downward pressing force to the top section so that the middle ring presses against the sealing ring and elastically compresses and deforms. 5) An upper plastic ring is injection molded on the top cover plate. The upper plastic ring wraps around the outer periphery of the fixing ring and the outer periphery of the bending ring. The upper plastic ring is embedded and fills the upper gap. 6) Assemble the lower plastic plate at the bottom of the top cover plate; In the preparation step 3), a soft rubber ring is protruding from the outer periphery of the sealing ring. The soft rubber ring is arranged around the circumference of the sealing ring, and the thickness of the soft rubber ring is less than the thickness of the sealing ring. When the sealing ring is placed on the mounting ring, there is a deformation gap between the soft rubber ring and the mounting ring. In step 4) of the preparation process, when the sealing ring is elastically compressed and deformed, the sealing ring extends toward the fixing ring, and the soft rubber ring extends toward the fixing ring simultaneously. The soft rubber ring is compressed and elastically deformed by the fixing ring, and the soft rubber ring protrudes toward the deformation interval and fills the deformation interval.

[0007] Furthermore, in the preparation step 1), the top of the upper section is provided with an upper boss, and the top of the upper boss has a connecting surface that connects to the busbar; in the preparation step 3), the upper boss passes through the fixed area and extends above the fixed area, and the connecting surface is exposed above the fixed area.

[0008] Furthermore, in preparation step 2), the top segment and the upper segment are arranged at intervals to form a lower interval; in preparation step 4), after the upper interval is formed, the upper interval and the lower interval are connected vertically; in preparation step 5), the upper plastic ring is embedded and filled into the lower interval.

[0009] Furthermore, in the preparation step 4), the width of the upper interval is smaller than the width of the lower interval, so that a downwardly arranged lower step groove is formed between the bending ring and the top segment; in the preparation step 5), the upper plastic ring is embedded and filled with the lower step groove, so that the upper plastic ring is misaligned and fixed between the bending ring and the top segment.

[0010] Furthermore, in the preparation step 1), a plurality of upper grooves are formed on the outer periphery of the upper segment, and the plurality of upper grooves are arranged around the upper segment at circumferential intervals, and the upper grooves are arranged to extend along the height direction of the upper segment. In preparation step 4), the upper groove is exposed in the upper and lower gaps; in preparation step 5), the upper plastic ring is embedded and filled with multiple upper grooves to restrict the circumferential fixation of the upper segment and the upper plastic ring.

[0011] Furthermore, in the preparation step 1), the upper grooves are arranged at an angle along the height direction of the upper section, and the angles of adjacent upper grooves are different.

[0012] Furthermore, in the preparation step 1), the width of the upper groove gradually increases along the direction from the inside to the outside, so that the upper groove is flared.

[0013] Furthermore, in the preparation step 3), there is an annular gap between the outer periphery of the lower section and the inner wall of the pole hole; in the preparation step 6), the lower plastic plate has a hollow area arranged vertically, and a raised ring is provided on the lower plastic plate, the raised ring being arranged around the circumference of the hollow area. The protruding ring is inserted into the annular gap and abuts against the inner wall of the pole hole to fix the lower plastic plate to the bottom of the top cover plate, and the protruding ring and the lower section are spaced apart; the lower section passes through the hollow area and extends to the bottom of the lower plastic plate.

[0014] Furthermore, in the preparation step 2), the outer peripheral segment is provided with a plurality of outer peripheral protrusions, and the plurality of outer peripheral protrusions are arranged around the outer peripheral segment at intervals in the circumferential direction; the top segment is provided with a plurality of top protrusions, and the plurality of top protrusions are arranged around the top segment at intervals in the circumferential direction; a curved transition segment is formed between the top segment and the outer peripheral segment. In the preparation step 3), multiple peripheral protrusions abut against the fixing ring to pre-position the pole post circumferentially in the fixed area, and peripheral flow channels are formed between adjacent peripheral protrusions, with multiple peripheral flow channels formed in the peripheral segment. In preparation step 4), the bending ring presses against the top protrusion, and a top flow channel is formed between adjacent top protrusions. The top section forms multiple top flow channels. A transition interval is formed between the transition section and the fixed ring. The top flow channel connects to the transition interval from top to bottom, and the outer peripheral flow channel connects to the transition interval from bottom to top. After the soft rubber ring is elastically deformed, the soft rubber ring is embedded and filled into the outer peripheral flow channel, forming multiple upper extension sections. The upper extension sections are exposed in the transition interval. In the preparation step 5), the upper plastic ring is embedded and filled in the top flow channel, and passes through the top flow channel to fill the transition interval. The upper plastic ring is connected to multiple upper extension segments so that the upper plastic ring and the soft rubber ring are connected as one.

[0015] Furthermore, in the preparation step 3), the bottom of the soft rubber ring is provided with a bottom protrusion ring, the bottom protrusion ring is formed in the middle of the soft rubber ring, and the bottom protrusion ring is placed in the deformation interval; the inner end of the soft rubber ring is connected to the outer periphery of the sealing ring, and the outer end of the soft rubber ring is raised upward to form an outer periphery raised ring, and the outer periphery raised ring abuts against the fixing ring. In the preparation step 4), after the soft rubber ring is elastically deformed, the bottom protruding ring is elastically deformed downwards to fill the deformation interval, and the outer peripheral raised ring is elastically deformed upwards to embed and fill the outer peripheral flow channel, forming multiple upper extension sections.

[0016] Compared with the prior art, the high-yield manufacturing method of the battery cover provided by the present invention improves the manufacturing yield of the battery cover by the fitting and cooperation of the bottom annular groove and the bottom section, and the compression filling of the deformation interval of the soft rubber ring. Specifically, the method has the following advantages: 1) In step 2), the bottom section of the outer plastic ring is filled in the bottom ring groove, so that the outer plastic ring and the middle ring are fitted and fixed.

[0017] In this way, the combination of the outer plastic ring and the middle ring no longer relies solely on the adhesion of the injection molding, but is mechanically locked by the engagement of the bottom section in the bottom ring groove, so that it is not easy to fall off or shift during subsequent bending, injection molding and other processes.

[0018] 2) The ratio of the bottom section thickness to the outer perimeter length gives the bottom section appropriate rigidity, enabling it to provide support to the outer perimeter from below; During the bending process, the outer plastic ring is not easily deformed, cracked, or detached under external force, thus ensuring the performance of the battery cover and improving the yield of the battery cover.

[0019] 3) In step 4), when the sealing ring is deformed by pressure, the soft rubber ring protrudes outward to fill the deformation gap.

[0020] In this way, the soft rubber ring can automatically fill the gap between the sealing ring and the mounting ring when the sealing ring is compressed, which enhances the compensation ability of the sealing structure and reduces manufacturing defects caused by poor sealing. Attached Figure Description

[0021] Figure 1 This is a schematic flowchart of the high-yield preparation method for the battery cover plate provided by the present invention; Figure 2 This is a planar schematic diagram of the pole provided by the present invention; Figure 3 This is a cross-sectional schematic diagram of the pole provided by the present invention; Figure 4 This is a cross-sectional schematic diagram of the outer plastic ring provided by the present invention; Figure 5This is a cross-sectional schematic diagram of the upper groove provided by the present invention; Figure 6 This is a schematic diagram showing the ratio of the outer perimeter segment to the bottom segment provided by the present invention; Figure 7 This is a planar schematic diagram of the top cover sheet provided by the present invention; Figure 8 This is an exploded view of the top cover plate provided by the present invention; Figure 9 This is a cross-sectional schematic diagram of the top cover plate provided by the present invention; Figure 10 This invention provides Figure 9 Enlarged view of the area marked A in the middle; Figure 11 This is a schematic diagram of the elastic deformation of the soft rubber ring provided by the present invention; Figure 12 This is a partial cross-sectional schematic diagram of the top section provided by the present invention; Figure 13 This is a cross-sectional schematic diagram of the outer peripheral section provided by the present invention; Figure 14 This is a top sectional view of the upper section provided by the present invention; In the diagram: pole post 100, upper section 101, lower section 102, upper boss 103, connecting surface 104, upper groove 105; middle ring 200; Outer plastic ring 300, top section 301, outer peripheral section 302, bottom section 303, lower interval 304, lower step groove 305; Top cover plate 400, pole hole 401, fixing ring 402, bending ring 403, upper spacer 404, mounting ring 405, upper plastic ring 406, lower plastic plate 407, hollow area 408, raised ring 409. 500 sealing ring, 501 soft rubber ring, 502 deformation interval, 503 upper extension, 504 bottom protruding ring, 505 outer peripheral raised ring; Transition section 600, peripheral protrusion 601, top protrusion 602, peripheral flow channel 603, top flow channel 604, transition interval 605. Detailed Implementation

[0022] 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.

[0023] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0024] 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.

[0025] Reference Figures 1-14 The image shows a preferred embodiment of the present invention.

[0026] A high-yield preparation method for battery cover plates includes the following preparation steps: 1) A stamped pole post 100 is formed. The upper part of the pole post 100 has an upper section 101, the lower part of the pole post 100 has a lower section 102, and the middle part of the pole post 100 has a middle ring 200, which is located between the upper section 101 and the lower section 102. A bottom annular groove 201 is formed at the bottom of the middle annular groove 201, which is arranged around the circumference of the middle annular groove 200. 2) An outer plastic ring 300 is formed by injection molding in the middle ring 200, and the outer plastic ring 300 wraps around the middle ring 200; the outer plastic ring 300 includes a top section 301 covering the top of the middle ring 200, an outer peripheral section 302 covering the outer periphery of the middle ring 200, and a bottom section 303 filling the bottom ring groove 201, wherein the ratio of the thickness of the bottom section 303 to the length of the outer peripheral section 302 is 3:5; 3) Provide a top cover plate 400, in which a pole post hole 401 is arranged vertically through the top cover plate 400, and a fixing ring 402 is arranged longitudinally on the top cover plate 400. The fixing ring 402 is arranged around the pole post hole 401 in the circumference, enclosing and forming a fixing area. The fixing area is vertically aligned and connected with the pole post hole 401. The top cover plate 400 has a mounting ring 405, which is formed at the bottom of the fixed area and surrounds the pole hole 401. A sealing ring 500 is provided on the mounting ring 405. The pole 100 is inserted into the top cover plate 400, the lower section 102 passes through the pole hole 401, the middle ring 200 and the upper section 101 are located in the fixed area, and the bottom of the middle ring 200 abuts against the sealing ring 500. 4) Bend the upper part of the fixed ring 402 downward to form a bent ring 403. The bent ring 403 presses against the top section 301 from top to bottom, and an upper gap 404 is formed between the bent ring 403 and the upper section 101. The bent ring 403 applies a downward pressing force to the top section 301 so that the middle ring 200 presses against the sealing ring 500 and elastically compresses and deforms. 5) An upper plastic ring 406 is formed by injection molding on the top cover plate 400. The upper plastic ring 406 wraps around the outer periphery of the fixing ring 402 and the outer periphery of the bending ring 403. The upper plastic ring 406 is embedded and filled in the upper space 404. 6) Assemble the lower plastic plate 407 at the bottom of the top cover plate 400; In preparation step 3), a soft rubber ring 501 is protruding from the outer periphery of the sealing ring 500. The soft rubber ring 501 is arranged around the circumference of the sealing ring 500, and the thickness of the soft rubber ring 501 is less than the thickness of the sealing ring 500. When the sealing ring 500 is placed on the mounting ring 405, there is a deformation gap 502 between the soft rubber ring 501 and the mounting ring 405. In preparation step 4), when the sealing ring 500 is elastically compressed and deformed, the sealing ring 500 extends toward the fixing ring 402, and the soft rubber ring 501 extends toward the fixing ring 402 at the same time. The soft rubber ring 501 is blocked and squeezed by the fixing ring 402 and elastically deformed. The soft rubber ring 501 protrudes toward the deformation interval 502 and fills the deformation interval 502.

[0027] The high-yield manufacturing method for the battery cover provided above improves the manufacturing yield of the battery cover through the interlocking fit between the bottom annular groove 201 and the bottom segment 303, and the compression filling deformation interval 502 of the soft rubber ring 501. Specifically, the method includes the following aspects: 1) In step 2), the bottom segment 303 of the outer plastic ring 300 is filled in the bottom ring groove 201, so that the outer plastic ring 300 and the middle ring 200 are fitted and fixed.

[0028] In this way, the combination of the outer plastic ring 300 and the middle ring 200 no longer relies solely on the adhesion of the injection molding, but is mechanically locked by the engagement of the bottom section 303 in the bottom ring groove 201, so that it is not easy to fall off or shift during subsequent bending, injection molding and other processes.

[0029] 2) The ratio of the thickness of the bottom section 303 to the length of the outer peripheral section 302 gives the bottom section 303 appropriate rigidity, which can provide support for the outer peripheral section 302 from below; During the bending process, the outer plastic ring 300 is not easily deformed, cracked, or detached under external force, thus ensuring the performance of the battery cover and improving the yield of the battery cover.

[0030] 3) In step 4), when the sealing ring 500 is deformed by pressure, the soft rubber ring 501 protrudes and fills the deformation gap 502.

[0031] In this way, when the sealing ring 500 is under pressure, the soft rubber ring 501 can automatically fill the gap between the sealing ring 500 and the mounting ring 405, which enhances the compensation ability of the sealing structure and reduces manufacturing defects caused by poor sealing.

[0032] In this embodiment, the outer plastic ring 300 and the upper plastic ring 406 formed by injection molding can preferably be made of existing LCP (liquid crystal polymer) plastic material to achieve a heat distortion temperature of not less than 320°C; while existing PPS (polyphenylene sulfide) plastic material can be selected, with a heat distortion temperature of not more than 280°C.

[0033] In contrast, LCP has an improved heat distortion temperature range of 40℃~50℃, which not only enhances the compatibility of the connection surface 104 with the busbar welding and avoids cracking of the plastic material, but also improves the overall high temperature resistance of the battery cover, thereby further ensuring the yield of the battery cover.

[0034] Because LCP plastic materials have high strength, high temperature resistance, and electrical insulation properties, they are often used as encapsulation and filling materials in the fields of electronics and electrical engineering.

[0035] As an extended embodiment, in preparation step 1), an upper boss 103 is formed on the top of the upper section 101, and the top of the upper boss 103 has a connecting surface 104 that is connected to the busbar; in preparation step 3), the upper boss 103 passes through the fixed area and extends above the fixed area, and the connecting surface 104 is exposed above the fixed area.

[0036] In this way, the connecting surface 104 is raised above the fixed area, and the welding tool can directly contact the connecting surface 104 from above to perform busbar welding without having to pass through the fixing ring 402; at the same time, the upper boss 103 serves as the carrier of the connecting surface 104, providing a stable base for the connecting surface 104 during the welding process.

[0037] The bus mentioned in this embodiment is mainly used to realize the electrical connection between the battery and the external circuit. In practical applications, the larger the diameter of the connection surface 104, the greater the current that can be passed, and the more application scenarios the battery top cover is suitable for, such as energy storage, power, UPS, data center and other scenarios.

[0038] As an extended embodiment, in preparation step 2), the top segment 301 and the upper segment 101 are arranged at intervals to form a lower interval 304; in preparation step 4), after the upper interval 404 is formed, the upper interval 404 and the lower interval 304 are connected vertically; in preparation step 5), the upper plastic ring 406 is embedded and filled with the lower interval 304.

[0039] The upper gap 404 and the lower gap 304 are connected vertically. When the upper plastic ring 406 is injected, it flows from one gap to another, and after curing, it forms a continuous structure.

[0040] In this way, compared to the case where the two separate gaps are filled separately, the overall continuous upper plastic ring 406 can disperse local stress over a larger area when under stress, thus resulting in higher strength.

[0041] As an extended embodiment, in preparation step 4), the width of the upper interval 404 is smaller than the width of the lower interval 304, so that a downwardly arranged lower step groove 305 is formed between the bending ring 403 and the top segment 301; in preparation step 5), the upper plastic ring 406 is embedded and filled with the lower step groove 305, so that the upper plastic ring 406 is misaligned and fixed between the bending ring 403 and the top segment 301.

[0042] In this way, the misalignment fixation through the lower step groove 305 geometrically restricts the relative horizontal displacement between the bending ring 403 and the top section 301, thereby enhancing the constraint of the upper plastic ring 406 on the bending ring 403 and the top section 301.

[0043] As an extended embodiment, in preparation step 1), a plurality of upper grooves 105 are formed on the outer periphery of the upper segment 101. The plurality of upper grooves 105 are arranged around the upper segment 101 at circumferential intervals and extend along the height direction of the upper segment 101. In preparation step 4), the upper groove 105 is exposed in the upper spacer 404 and the lower spacer 304; in preparation step 5), the upper plastic ring 406 is embedded and filled with multiple upper grooves 105 to restrict the circumferential fixation of the upper segment 101 and the upper plastic ring 406.

[0044] In this way, the upper plastic ring 406 forms a solidified portion corresponding to the upper groove 105 at each upper groove 105. Multiple solidified portions are distributed circumferentially along the upper segment 101, which restricts the relative rotation between the upper plastic ring 406 and the upper segment 101 in the circumferential direction, thereby achieving circumferential fixation between the upper segment 101 and the upper plastic ring 406.

[0045] As an extended embodiment, in preparation step 1), the upper grooves 105 are arranged at an angle along the height direction of the upper segment 101, and the angles of adjacent upper grooves 105 are different.

[0046] Since the adjacent upper grooves 105 have different inclination directions, after the upper plastic ring 406 is embedded and filled, the solidified part of the upper plastic ring 406 in the adjacent upper grooves 105 also has different inclination directions.

[0047] In this way, when the upper plastic ring 406 is subjected to axial force, the inclined solidified part can block the axial movement of the upper plastic ring 406; at the same time, the inclined arrangement with different directions makes the blocking direction of the upper plastic ring 406 inconsistent in different positions, and the multiple upper grooves 105 jointly constrain the axial displacement of the upper plastic ring 406 from different directions, making the circumferential fixation between the upper plastic ring 406 and the upper section 101 more secure.

[0048] As an extended embodiment, in preparation step 1), the width of the upper groove 105 gradually increases from the inside out along the direction of the upper groove 105, so that the upper groove 105 is flared.

[0049] In this way, the 406 material in the upper ring has low flow resistance during injection molding, and can flow smoothly into the narrow area deep in the upper groove 105, reducing material shortages or air bubbles caused by poor flow.

[0050] Meanwhile, the outer end of the cured portion of the upper plastic ring 406 within the upper groove 105 is wider after curing, and the connection cross section between the cured portion and the main body of the upper plastic ring 406 is increased, thereby increasing the strength of the connection and making the fit between the upper plastic ring 406 and the upper section 101 more secure.

[0051] As an extended embodiment, in preparation step 3), there is an annular gap between the outer periphery of the lower section 102 and the inner sidewall of the pole hole 401; in preparation step 6), the lower plastic plate 407 has a hollow area 408 arranged vertically, and a protruding ring 409 is provided on the lower plastic plate 407, which is arranged around the circumference of the hollow area 408. The protruding ring 409 is inserted into the annular gap and abuts against the inner sidewall of the pole hole 401 so that the lower plastic plate 407 is fixed to the bottom of the top cover plate 400, and the protruding ring 409 and the lower section 102 are spaced apart; the lower section 102 passes through the hollow area 408 and extends to the bottom of the lower plastic plate 407.

[0052] The protruding ring 409 is inserted into the annular gap between the lower section 102 and the pole hole 401, and abuts against the inner wall of the pole hole 401, so that the lower plastic plate 407 is positioned and supported at the bottom of the top cover plate 400, preventing the lower plastic plate 407 from sliding laterally on the bottom surface of the top cover plate 400. The hollow area 408 is vertically aligned and connected with the pole hole 401, reserving a through channel for the lower section 102 to pass through.

[0053] In this way, the lower plastic plate 407 is securely mounted to the bottom of the top cover plate 400 through the positioning of the protruding ring 409 and the penetration of the hollow area 408, so that the lower section 102 can extend to the bottom of the lower plastic plate 407 after it passes through.

[0054] As an extended embodiment, in preparation step 2), the outer peripheral segment 302 is provided with a plurality of outer peripheral protrusions 601, which are arranged around the outer peripheral segment 302 at circumferential intervals; the top segment 301 is provided with a plurality of top protrusions 602, which are arranged around the top segment 301 at circumferential intervals; and a curved transition segment 600 is formed between the top segment 301 and the outer peripheral segment 302. In step 3), multiple peripheral protrusions 601 abut against the fixing ring 402 so that the pole post 100 is pre-positioned circumferentially in the fixed area, and peripheral flow channels 603 are formed between adjacent peripheral protrusions 601, and multiple peripheral flow channels 603 are formed in the peripheral segment 302. In preparation step 4), the bent ring 403 presses against the top protrusion 602, and a top flow channel 604 is formed between adjacent top protrusions 602. The top section 301 forms multiple top flow channels 604. A transition interval 605 is formed between the transition section 600 and the fixed ring 402. The top flow channel 604 connects to the transition interval 605 from top to bottom, and the outer peripheral flow channel 603 connects to the transition interval 605 from bottom to top. After the soft rubber ring 501 is elastically deformed, the soft rubber ring 501 is embedded and filled into the outer peripheral flow channel 603, forming multiple upper extension sections 503. The upper extension sections 503 are exposed in the transition interval 605. In preparation step 5), the upper plastic ring 406 is embedded and filled in the top flow channel 604, and passes through the top flow channel 604 to fill the transition interval 605. The upper plastic ring 406 is connected to multiple upper extension segments 503 so that the upper plastic ring 406 and the soft rubber ring 501 are connected as one.

[0055] By abutting the fixing ring 402 with the outer peripheral protrusion 601, the pole post 100 obtains circumferential pre-positioning when it enters the fixed area, which facilitates the alignment operation of subsequent processes.

[0056] The top flow channel 604, the transition interval 605, and the outer peripheral flow channel 603 form a continuous channel running from top to bottom, allowing the upper plastic ring 406 to be continuously filled without any splicing seams.

[0057] In this way, the upper plastic ring 406 and the upper extension 503 of the soft rubber ring 501 are joined together at the transition interval 605, and the two are seamlessly connected by the continuously filled upper plastic ring 406; therefore, after the upper plastic ring 406 and the soft rubber ring 501 are prepared, they can jointly constrain the pole post 100 and the fixing ring 402 as an integral structure.

[0058] As an extended embodiment, in preparation step 3), the bottom of the soft rubber ring 501 is provided with a bottom protrusion ring 504, which is formed in the middle of the soft rubber ring 501 and is placed in the deformation interval 502; the inner end of the soft rubber ring 501 is connected to the outer periphery of the sealing ring 500, and the outer end of the soft rubber ring 501 is raised upward to form an outer periphery raised ring 505, which abuts against the fixing ring 402; In preparation step 4), after the soft rubber ring 501 is elastically deformed, the bottom protruding ring 504 is elastically deformed downwards to fill the deformation interval 502, and the outer peripheral raised ring 505 is elastically deformed upwards to embed and fill the outer peripheral flow channel 603, forming multiple upper extension sections 503.

[0059] By setting the bottom protruding ring 504 and the outer peripheral raised ring 505, the soft rubber ring 501 can form a deformation response in two directions when it is deformed under pressure.

[0060] In this process, the bottom and top of the soft rubber ring 501 are simultaneously deformed and filled, forming a seal and fit at two positions: the deformation interval 502 and the outer peripheral flow channel 603, respectively.

[0061] Therefore, in a pressurized action, the soft rubber ring 501 simultaneously completes the sealing and filling of the deformation gap 502 and the fitting and docking with the outer peripheral flow channel 603, so that the sealing of the deformation gap 502 and the outer peripheral flow channel 603 is completed synchronously in the same action.

[0062] 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 high-yield preparation method for battery cover plates, characterized in that, The preparation steps include the following: 1) A stamped pole post is formed, wherein the upper part of the pole post has an upper section, the lower part of the pole post has a lower section, and the middle part of the pole post has a middle ring, wherein the middle ring is located between the upper section and the lower section; a bottom ring groove is formed at the bottom of the middle ring, and the bottom ring groove is arranged around the circumference of the middle ring. 2) An outer plastic ring is formed by injection molding in the middle ring, and the outer plastic ring wraps around the middle ring; the outer plastic ring includes a top section covering the top of the middle ring, an outer peripheral section covering the outer periphery of the middle ring, and a bottom section filling the bottom ring groove, wherein the ratio of the thickness of the bottom section to the length of the outer peripheral section is 3:

5. 3) Provide a top cover plate, wherein the top cover plate has a vertically through pole hole, and the top cover plate has a longitudinally arranged fixing ring, which is arranged around the pole hole in the circumference to form a fixing area, and the fixing area is vertically aligned and connected to the pole hole. The top cover has a mounting ring formed at the bottom of the fixed area, and the mounting ring surrounds the pole hole; a sealing ring is provided on the mounting ring, the pole is inserted into the top cover, the lower section passes through the pole hole, the middle ring and the upper section are located in the fixed area, and the bottom of the middle ring abuts against the sealing ring; 4) The upper part of the fixed ring is bent downward to form a bent ring. The bent ring presses against the top section from top to bottom, and an upper gap is formed between the bent ring and the upper section. The bent ring applies a downward pressing force to the top section so that the middle ring presses against the sealing ring and elastically compresses and deforms. 5) An upper plastic ring is injection molded on the top cover plate. The upper plastic ring wraps around the outer periphery of the fixing ring and the outer periphery of the bending ring. The upper plastic ring is embedded and fills the upper gap. 6) Assemble the lower plastic plate at the bottom of the top cover plate; In the preparation step 3), a soft rubber ring is protruding from the outer periphery of the sealing ring. The soft rubber ring is arranged around the circumference of the sealing ring, and the thickness of the soft rubber ring is less than the thickness of the sealing ring. When the sealing ring is placed on the mounting ring, there is a deformation gap between the soft rubber ring and the mounting ring. In step 4) of the preparation process, when the sealing ring is elastically compressed and deformed, the sealing ring extends toward the fixing ring, and the soft rubber ring extends toward the fixing ring simultaneously. The soft rubber ring is compressed and elastically deformed by the fixing ring, and the soft rubber ring protrudes toward the deformation interval and fills the deformation interval.

2. The high-yield preparation method of the battery cover plate as described in claim 1, characterized in that, In preparation step 1), the top of the upper section is provided with an upper boss, and the top of the upper boss has a connecting surface that connects to the busbar; in preparation step 3), the upper boss passes through the fixed area and extends above the fixed area, and the connecting surface is exposed above the fixed area.

3. The high-yield preparation method of the battery cover plate as described in claim 1, characterized in that, In preparation step 2), the top segment and the upper segment are arranged at intervals to form a lower interval; in preparation step 4), after the upper interval is formed, the upper interval and the lower interval are connected vertically; in preparation step 5), the upper plastic ring is embedded and filled into the lower interval.

4. The high-yield preparation method of the battery cover plate as described in claim 1, characterized in that, In preparation step 4), the width of the upper interval is smaller than the width of the lower interval, so that a downwardly arranged lower step groove is formed between the bending ring and the top segment; in preparation step 5), the upper plastic ring is embedded and filled with the lower step groove, so that the upper plastic ring is misaligned and fixed between the bending ring and the top segment.

5. The high-yield preparation method of the battery cover plate according to any one of claims 1-4, characterized in that, In the preparation step 1), a plurality of upper grooves are formed on the outer periphery of the upper section, and the plurality of upper grooves are arranged around the upper section at intervals along the circumferential direction, and the upper grooves are arranged to extend along the height direction of the upper section. In the preparation step 4), the upper groove is exposed in the upper spacer and the lower spacer; In the preparation step 5), the upper plastic ring is embedded and filled with multiple upper grooves to restrict the circumferential fixation of the upper segment and the upper plastic ring.

6. The high-yield preparation method of the battery cover plate as described in claim 5, characterized in that, In the preparation step 1), the upper grooves are arranged at an angle along the height direction of the upper section, and the angles of adjacent upper grooves are different.

7. The high-yield preparation method of the battery cover plate as described in claim 5, characterized in that, In the preparation step 1), the width of the upper groove gradually increases from the inside out, so that the upper groove is flared.

8. The high-yield preparation method of the battery cover plate according to any one of claims 1-4, characterized in that, In preparation step 3), there is an annular gap between the outer periphery of the lower section and the inner wall of the pole hole; in preparation step 6), the lower plastic plate has a hollow area arranged vertically, and a raised ring is provided on the lower plastic plate, which is arranged around the circumference of the hollow area. The protruding ring is inserted into the annular gap and abuts against the inner wall of the pole hole to fix the lower plastic plate to the bottom of the top cover plate, and the protruding ring and the lower section are spaced apart; the lower section passes through the hollow area and extends to the bottom of the lower plastic plate.

9. The high-yield preparation method of the battery cover plate according to any one of claims 1-4, characterized in that, In the preparation step 2), the outer peripheral segment is provided with a plurality of outer peripheral protrusions, which are arranged around the outer peripheral segment at intervals in the circumferential direction; the top segment is provided with a plurality of top protrusions, which are arranged around the top segment at intervals in the circumferential direction; and a curved transition segment is formed between the top segment and the outer peripheral segment. In the preparation step 3), multiple peripheral protrusions abut against the fixing ring to pre-position the pole post circumferentially in the fixed area, and peripheral flow channels are formed between adjacent peripheral protrusions, with multiple peripheral flow channels formed in the peripheral segment. In preparation step 4), the bending ring presses against the top protrusion, and a top flow channel is formed between adjacent top protrusions. The top section forms multiple top flow channels. A transition interval is formed between the transition section and the fixed ring. The top flow channel connects to the transition interval from top to bottom, and the outer peripheral flow channel connects to the transition interval from bottom to top. After the soft rubber ring is elastically deformed, the soft rubber ring is embedded and filled into the outer peripheral flow channel, forming multiple upper extension sections. The upper extension sections are exposed in the transition interval. In the preparation step 5), the upper plastic ring is embedded and filled in the top flow channel, and passes through the top flow channel to fill the transition interval. The upper plastic ring is connected to multiple upper extension segments so that the upper plastic ring and the soft rubber ring are connected as one.

10. The high-yield preparation method of the battery cover plate as described in claim 9, characterized in that, In the preparation step 3), the bottom of the soft rubber ring is provided with a bottom protrusion ring, the bottom protrusion ring is formed in the middle of the soft rubber ring, and the bottom protrusion ring is placed in the deformation interval; the inner end of the soft rubber ring is connected to the outer periphery of the sealing ring, and the outer end of the soft rubber ring is raised upward to form an outer periphery raised ring, and the outer periphery raised ring abuts against the fixing ring. In the preparation step 4), after the soft rubber ring is elastically deformed, the bottom protruding ring is elastically deformed downwards to fill the deformation interval, and the outer peripheral raised ring is elastically deformed upwards to embed and fill the outer peripheral flow channel, forming multiple upper extension sections.

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