Battery top cover and acid-leakage-corrosion-resistant battery

By designing a sealed connection structure in the lead-acid battery ceiling, including a stress buffer layer, the battery's short service life caused by torque shedding and acid-climbing corrosion is solved, and a higher resistance to acid-climbing corrosion and service life is achieved.

CN222826501UActive Publication Date: 2025-05-02CHAOWEI POWER GROUP CO LTD
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Patent Information

Application Number
CN202421416834.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-20
Publication Date
2025-05-02
Estimated Expiration
2034-06-20

AI Technical Summary

Technical Problem

The existing lead-acid batteries have short service life due to the torque shed of the copper core nested at the end pole column and the acid-crawling corrosion of the extreme pole column, and have failed to achieve the expected design life.

Method used

A battery ceiling is designed, including a cover body, a battery terminal post and a sealing connection structure. The sealing connection structure consists of a first fixed connection structure, a stress buffer structure and a second fixed connection structure. The stress buffer structure, such as a thermoreflective sealing layer, can change with the cover body and the terminal post when the temperature changes to avoid peeling.

Benefits of technology

Through the design of the sealed connection structure, the battery's ability to cushion is improved, the battery's service life is extended, and the resistance to acid recession corrosion is enhanced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of acid-leakage-corrosion-resistant batteries, in particular to a battery top cover and an acid-leakage-corrosion-resistant battery, and the battery top cover comprises a cover body, a battery end pole and a sealing connection structure, the cover body is provided with a through hole, and the battery terminal post penetrates through the through hole and is fixedly connected with the side wall of the through hole of the cover body through a sealing connection structure; the sealing connection structure comprises a first fixed connection structure, a stress buffer structure and a second fixed connection structure which are sequentially arranged from the bottom to the top of the battery top cover. According to the utility model, the sealing connection structure is arranged between the terminal post and the cover body, and the stress buffer structure in the sealing connection structure can change along with the cover body and the battery terminal post due to self mobility when the temperature changes, so that the stress buffer structure is prevented from being stripped from the cover body and the battery terminal post, the acid leakage corrosion resistance is improved, and the service life of the battery is prolonged; the problems that in the prior art, acid leakage corrosion is not resisted, and the service life is short are solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of acid corrosion resistant batteries, in particular to a battery top cover and an acid corrosion resistant battery. Background Art

[0002] Lead-acid batteries have good charging and discharging performance, are safe and stable, and are cheap. They are currently widely used in electric bicycles, automobiles, USP, energy storage and other fields. They are mainly composed of positive plates, negative plates, electrolytes, separators, electrolytic cells, battery covers, poles, etc. The poles are used to connect the internal circuit of the battery with the external circuit. However, the existing lead-acid batteries still have certain defects. Many of them fail due to reasons such as the end pole nesting copper core falling off due to torsion, pole climbing acid corrosion, etc., and do not reach the expected design life.

[0003] The market is in urgent need of a lead-acid battery with a sturdy structure, resistance to torsion shedding and resistance to acid corrosion. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a battery top cover and an acid corrosion resistant battery, which solves at least one of the problems of the acid corrosion resistant battery in the prior art, such as the lack of acid corrosion resistance and short service life.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] A battery top cover, comprising: a cover body, a battery terminal pole and a sealing connection structure;

[0007] The cover body is provided with a through hole, and the battery terminal pole passes through the through hole and is fixedly connected to the through hole side wall of the cover body through a sealing connection structure;

[0008] The sealing connection structure comprises a first fixed connection structure, a stress buffer structure, and a second fixed connection structure which are sequentially arranged from the bottom to the top of the battery top cover.

[0009] Preferably, the first fixed connection structure and the second fixed connection structure are the same or different, and are different from the stress buffer structure, and the stress buffer structure is a thermally induced flow sealing layer.

[0010] Preferably, the stress buffer structure is a vaseline layer, an industrial butter layer or a high vacuum silicone grease layer.

[0011] Preferably, the battery terminal pole comprises: a fitting and a terminal;

[0012] The terminal is provided with a cylindrical concave portion, and the engaging piece partially penetrates into the interior of the cylindrical concave portion and is die-casted and connected to the cylindrical concave portion.

[0013] Preferably, the outer side wall of the cylindrical concave portion is further provided with a first annular groove, a second annular groove and a third annular groove which are arranged in sequence from bottom to top perpendicular to the axis of the cylindrical concave portion.

[0014] Preferably, the first annular groove, the second annular groove and the third annular groove are right-angle grooves.

[0015] Preferably, the terminal is further provided with a screw connection portion, which is a trapezoidal block, wherein one side of the short side of the trapezoidal block is connected to the bottom outer side wall of the cylindrical concave portion, and one side of the long side is connected to the internal busbar of the battery.

[0016] Preferably, the side surface of the cylindrical concave portion penetrates into the inner side of the short side of the trapezoidal block, and the two are connected by an arc surface.

[0017] Preferably, an annular protrusion is provided at the connection between the threaded portion and the cylindrical concave portion, and is arranged around the axis of the cylindrical concave portion;

[0018] The battery top cover also includes a glue cup, which is connected to the screw connection portion. A fourth annular groove is provided at one end of the connection between the glue cup and the screw connection portion, and the fourth annular groove is matched and connected to the annular protrusion.

[0019] A battery resistant to acid corrosion, comprising the above-mentioned battery top cover, battery cells, battery casing and necessary busbar structure;

[0020] The battery top cover is provided with a battery terminal pole and a cover body sealed and connected to the battery terminal pole;

[0021] The battery terminal pole is fixed to the battery housing and communicates with the battery unit through a busbar structure;

[0022] There are at least two battery terminal poles, which are respectively connected to the positive electrode area and the negative electrode area of ​​the battery unit.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) The utility model provides a sealed connection structure between the terminal column and the cover body. The stress buffer structure in the sealed connection structure can change with the cover body and the battery terminal column due to its own fluidity when the temperature changes, thereby avoiding the peeling of the stress buffer structure and the cover body and the battery terminal column, thereby improving the resistance to acid corrosion and the service life of the battery.

[0025] (2) The outer side wall of the battery terminal pole of the utility model is provided with a first annular groove, a second annular groove, and a third annular groove arranged in sequence from bottom to top, and the three grooves are right-angle grooves, which further improves the resistance to acid corrosion and the service life of the battery.

[0026] Other features and advantages of the utility model will be described in the following description, and some advantages may become apparent from the description, or may be understood by implementing the utility model. The purpose and other advantages of the utility model may be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Stereoscopic view of the battery top cover;

[0028] Figure 2 : Top view of the battery cover;

[0029] Figure 3 : Front view of battery cover;

[0030] Figure 4a : AA surface cross-sectional view of the battery top cover;

[0031] Figure 4b : Figure 4a A partial enlarged view of

[0032] Figure 5a : Schematic diagram of the three-dimensional structure of the rubber cup;

[0033] Figure 5b : Front view of the rubber cup;

[0034] Figure 5c : Sectional view of CC surface of rubber cup;

[0035] Figure 6a : Schematic diagram of the three-dimensional structure of the battery terminal column;

[0036] Figure 6b : Front view of battery terminal;

[0037] Figure 6c : BB cross-sectional view of the battery terminal.

[0038] Reference numerals:

[0039] Cover body 01; Battery terminal pole 02; Sealed connection structure 03;

[0040] First fixed connection structure 301; stress buffer structure 302; second fixed connection structure 303; fitting part 1

[0041] Threaded connection area 104;

[0042] terminal 2;

[0043] Screw connection portion 201; annular protrusion 2011;

[0044] A cylindrical concave portion 202;

[0045] Glue cup 203; fourth annular groove 2031;

[0046] A first annular groove 204a; a second annular groove 204b; and a third annular groove 204c. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0048] like Figure 1-6c As shown, on the one hand, the utility model discloses a battery top cover, comprising: a cover body 01, a battery terminal pole 02 and a sealing connection structure 03;

[0049] The cover body 01 is provided with a through hole, and the battery terminal pole 02 passes through the through hole and is fixedly connected to the side wall of the through hole through the sealing connection structure 03;

[0050] The sealing connection structure 03 includes a first fixed connection structure 301, a stress buffer structure 302, and a second fixed connection structure 303 stacked in sequence from the bottom to the top of the battery top cover;

[0051] The first fixed connection structure 301 and the second fixed connection structure 303 are the same or different, and are different from the stress buffer structure 302. The stress buffer structure 302 is a thermally induced flow sealing layer;

[0052] The stress buffer structure 302 can change with the cover body 01 and the battery terminal pole 02 due to its own fluidity when the temperature changes, thereby preventing the stress buffer structure 302 from peeling off from the cover body 01 and the battery terminal pole 02.

[0053] Specifically, the stress buffer structure 302 may be a vaseline layer, an industrial butter layer, or a high vacuum silicone grease layer.

[0054] Specifically, the first fixed connection structure 301 and the second fixed connection structure 303 may be sealant layers.

[0055] Compared with the prior art, the sealing connection structure of the utility model includes a first fixed connection structure, a stress buffer structure, and a second fixed connection structure which are arranged in sequence from the bottom to the top of the battery top cover. When the temperature changes, the stress buffer structure can change with the cover body and the battery terminal pole due to its own fluidity, thereby avoiding the peeling of the stress buffer structure and the cover body and the battery terminal pole, and improving the resistance to acid corrosion and the service life of the battery.

[0056] Specifically, the thermally induced fluidity of the first fixed connection structure 301 , the stress buffer structure 302 , and the second fixed connection structure 303 satisfies: the stress buffer structure 302 > the first fixed connection structure 301 and the second fixed connection structure 303 .

[0057] Preferably, the battery terminal pole 02 comprises: a fitting 1 and a terminal 2;

[0058] The terminal 2 is provided with a cylindrical concave portion 202 , and a portion of the fitting 1 penetrates into the cylindrical concave portion 202 and is die-casted to the cylindrical concave portion 202 .

[0059] During implementation, the prefabricated insert 1 and the lead alloy raw material are die-cast in a mold, and the insert 1 is positioned relative to the mold to obtain a battery terminal pole in which the insert 1 is partially embedded in the terminal 2.

[0060] Specifically, the insert 1 can be prefabricated by casting, milling and turning.

[0061] It should be noted that the die-casting operation can utilize high pressure to make the alloy lead have better fluidity, which can not only be fixedly connected to the outer surface of the insert 1, but even cause a certain diffusion connection, thereby improving the connection strength.

[0062] During implementation, the fitting 1 is fixedly connected to the cylindrical concave portion 202, the outer wall of the cylindrical concave portion 202 is filled with sealant, and is fixedly connected to the cover body 01 of the battery shell through the first fixed connection structure 301 and the second fixed connection structure 303 in the sealing connection structure 03; at the same time, the first fixed connection structure 301, the second fixed connection structure 303, and the stress buffer structure 302 can play a sealing role to seal the inside and outside of the battery; when the temperature of the battery top cover changes, because the thermal expansion coefficients of the first fixed connection structure 301, the second fixed connection structure 303 and the terminal 2 and the cover body 01 are different, it is easy to cause the first fixed connection structure 301, the second fixed connection structure 303 and the terminal 2 and the cover body 01 to peel off; the difference is that because the fluidity of the stress buffer structure 302 can change with the thermal deformation of the cover body 01 and the battery terminal column 02, the stress buffer structure 302 and the cover body 01 and the battery terminal column 02 are prevented from peeling off.

[0063] Preferably, the terminal 2 is further provided with a screw connection portion 201, which is a trapezoidal block, one side of the short side of the trapezoidal block is connected to the bottom outer wall of the cylindrical concave portion 202, and one side of the long side is connected to the internal busbar of the battery.

[0064] Preferably, the side surface of the cylindrical concave portion 202 penetrates into the inner side of the short side of the trapezoidal block, and the two are connected by an arc surface.

[0065] During implementation, the screw connection portion 201 can bridge the internal busbar area of ​​the battery and the cylindrical concave portion 202. The design of the trapezoidal block can save the amount of material used in the screw connection portion without increasing the current transmission voltage drop. The side surface of the cylindrical concave portion 202 and the inner side of the short side of the trapezoidal block of the screw connection portion 201 are connected with an arc surface, making the electrical connection between the two more uniform and reducing local resistance and loss.

[0066] Preferably, the outer side wall of the cylindrical concave portion 202 is further provided with a first annular groove 204a, a second annular groove 204b, and a third annular groove 204c which are sequentially arranged from bottom to top and perpendicular to the axis of the cylindrical concave portion 202.

[0067] During implementation, the first annular groove 204a, the second annular groove 204b, and the third annular groove 204c increase the acid creeping distance along the interface between the sealant and the outer wall of the cylindrical concave portion 202, thereby delaying the time of complete acid creeping failure and improving the ability to resist acid creeping corrosion.

[0068] Specifically, the depth of the first annular groove 204a, the second annular groove 204b, and the third annular groove 204c may be 2.5 mm, the width of the first annular groove 204a and the third annular groove 204c may be 2 mm, and the width of the second annular groove 204b may be 3 mm.

[0069] During implementation, the first fixed connection structure 301 and the second fixed connection structure 303 are obtained by injecting sealant, and the stress buffer structure 302 is filled with vaseline, industrial butter or high vacuum silicone grease. The height of the first fixed connection structure 301 is between the first annular groove 204a and the second annular groove 204b, and the height is not higher than the second annular groove 204b; the height of the stress buffer structure 302 is such that the second annular groove 204b is completely filled with vaseline, industrial butter or high vacuum silicone grease, and the height does not exceed the third annular groove 204c; the height of the second fixed connection structure 303 is such that the top of the stress buffer structure 302 is flush with the cover body 01.

[0070] Preferably, the first annular groove 204a, the second annular groove 204b and the third annular groove 204c are right-angle grooves.

[0071] It should be noted that the right-angle groove of the utility model has better anti-climbing acid corrosion ability than the rounded groove due to its right angle.

[0072] Compared with the prior art, the outer side wall of the battery terminal pole of the utility model is provided with a first annular groove, a second annular groove, and a third annular groove arranged in sequence from bottom to top, and the three grooves are right-angle grooves, which further improves the resistance to acid corrosion and the service life of the battery.

[0073] Preferably, an annular protrusion 2011 is provided at the connection between the screw connection portion 201 and the cylindrical concave portion 202, and is arranged around the axis of the cylindrical concave portion 202; the battery top cover also includes a rubber cup 203, and a fourth annular groove 2031 is provided at one end connected to the screw connection portion 201, and the fourth annular groove 2031 is matched and connected with the annular protrusion 2011.

[0074] During implementation, the fourth annular groove 2031 is engaged with the annular protrusion 2011, and the glue cup 203 and the screw connection part 201 form a glue injection cavity for injecting glue when the first fixed connection structure 301 is formed; then the stress buffer structure 302 is filled, and finally the glue is injected for the second time until it is flush with the cover body 01 to complete the molding of the second fixed connection structure 303.

[0075] Specifically, the fitting 1 is provided with a threaded connection area 104, which can realize a convenient detachable connection with a conductive screw having a matching external thread.

[0076] On the other hand, the utility model discloses a battery resistant to acid corrosion, comprising the above-mentioned battery top cover, battery unit, battery shell and necessary confluence structure;

[0077] The battery top cover is provided with a battery terminal pole and a cover body sealed and connected to the battery terminal pole;

[0078] The battery terminal pole is fixed to the battery housing and is connected to the battery unit through the busbar structure;

[0079] The battery terminal poles are provided with at least two poles which are respectively connected with the positive electrode area and the negative electrode area of ​​the battery unit.

[0080] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A battery top cover, characterized in that: include: Cover body, battery terminal pole and sealing connection structure; The cover body is provided with a through hole, and the battery terminal pole passes through the through hole and is fixedly connected to the through hole side wall of the cover body through a sealing connection structure; The sealing connection structure comprises a first fixed connection structure, a stress buffer structure, and a second fixed connection structure which are sequentially arranged from the bottom to the top of the battery top cover.

2. A battery top cover according to claim 1, characterized in that: The first fixed connection structure and the second fixed connection structure are the same or different, and are different from the stress buffer structure. The stress buffer structure is a thermally induced flow sealing layer.

3. A battery top cover according to claim 1 or 2, characterized in that: The stress buffer structure is a vaseline layer, an industrial butter layer or a high vacuum silicone grease layer.

4. A battery top cover according to claim 1 or 2, characterized in that: The battery terminal pole comprises: an insert and a terminal; The terminal is provided with a cylindrical concave portion, and the engaging piece partially penetrates into the interior of the cylindrical concave portion and is die-casted to be connected with the cylindrical concave portion.

5. A battery top cover according to claim 4, characterized in that: The outer side wall of the cylindrical concave portion is also provided with a first annular groove, a second annular groove, and a third annular groove which are arranged in sequence from bottom to top and are perpendicular to the axis of the cylindrical concave portion.

6. A battery top cover according to claim 5, characterized in that: The first annular groove, the second annular groove and the third annular groove are right-angle grooves.

7. A battery top cover according to claim 4, characterized in that: The terminal is also provided with a screw connection part, which is a trapezoidal block. One side of the short side of the trapezoidal block is connected to the bottom outer side wall of the cylindrical concave part, and one side of the long side is connected to the internal busbar area of ​​the battery.

8. A battery top cover according to claim 7, characterized in that: The side surface of the cylindrical concave portion penetrates into the inner side of the short side of the trapezoidal block, and the two are connected by an arc surface.

9. A battery top cover according to claim 7, characterized in that: The connection between the threaded portion and the cylindrical concave portion is provided with an annular protrusion, which is arranged around the axis of the cylindrical concave portion; The battery top cover also includes a glue cup, which is connected to the screw connection portion. A fourth annular groove is provided at one end of the glue cup connected to the screw connection portion, and the fourth annular groove is matched and connected to the annular protrusion.

10. A battery resistant to acid corrosion, characterized in that: Comprising the battery top cover, battery cell, battery housing and busbar structure according to any one of claims 1 to 9; The battery top cover is provided with a battery terminal pole and a cover body sealed and connected to the battery terminal pole; The battery terminal pole is fixed to the battery housing and communicates with the battery unit through a busbar structure; There are at least two battery terminal poles, which are respectively connected to the positive electrode area and the negative electrode area of ​​the battery unit.