A battery top cover structure and processing technology thereof

Abstract

The present invention discloses a battery top cover structure and a processing technology thereof, including a body, a positive pole and a negative pole, the body including a cover plate and a lower plastic plate stacked in sequence, a first pole hole and a second pole hole are respectively arranged on both sides of the body, and a first clamping groove and a second clamping groove are opened on the lower plastic plate; a first boss is arranged on the bottom surface of the positive pole, a second boss is arranged on the negative pole, a limited retaining ring is arranged on the top of the positive pole, and the first boss abuts against the first clamping groove; an upper plastic body is embedded between the positive pole and the first pole hole, and the upper plastic body abuts against the limited retaining ring. The limited retaining ring plays a role of limiting and fixing the upper plastic body, and the cover plate and the lower plastic plate are clamped and fixed by the joint action of the upper plastic body and the pole; during the installation process, if it is found that the pole, the cover plate or the lower plastic plate is defective, it can be replaced in time by disassembly and replacement, which is convenient and fast, and saves costs at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a battery top cover structure and a processing technology thereof. Background Art

[0002] Lithium batteries have the advantages of light weight, high capacity, long life, low self-discharge rate, no memory effect, and no pollution. In particular, power lithium batteries are widely used in electric bicycles, electric hardware tools and other equipment. These devices require batteries to have large capacity and high power. Power lithium batteries have certain advantages in this regard.

[0003] In the prior art, the battery cover of the lithium battery is provided with positive / negative poles, and the bottoms of the positive / negative poles are welded to the battery cover. The disadvantage is that when the battery cover is processed, if the positive / negative poles are poorly welded or damaged and need to be replaced, the battery cover as a whole will be scrapped and cannot be used, resulting in a waste of production materials and high production costs.

[0004] In view of this, it is necessary to improve the lithium battery cover in the prior art to solve the problem of poor welding of the positive / negative poles or damage to the positive / negative poles, which causes the battery cover to be scrapped as a whole and high production costs. Summary of the invention

[0005] The purpose of the present invention is to provide a battery top cover structure and a processing technology thereof to solve the above technical problems.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A battery top cover structure comprises a body, a positive pole and a negative pole, wherein the body comprises a cover plate and a lower plastic plate which are stacked in sequence, a first pole hole for accommodating the positive pole and a second pole hole for accommodating the negative pole are respectively arranged at two sides of the body, and a first clamping groove communicating with the first pole hole and a second clamping groove communicating with the second pole hole are arranged on the bottom surface of the lower plastic plate;

[0008] The bottom surface of the positive electrode column is provided with a first boss, one end surface of the positive electrode column passes through the first electrode column hole and a limit stop ring is provided at the top thereof, and the first boss abuts against the first clamping groove; an upper plastic body is embedded between the positive electrode column and the first electrode column hole, a brim portion is provided on the top surface of the upper plastic body extending outward, and the top surface of the brim portion abuts against the limit stop ring;

[0009] A second boss is arranged on the bottom surface of the negative pole, one end surface of the negative pole passes through the second pole hole and a limit ring is arranged on the top of the negative pole, and the second boss abuts against the second clamping groove; the upper plastic body is embedded between the positive pole and the second pole hole, and the top surface of the cap brim abuts against the limit ring.

[0010] Optionally, a sealing ring is provided at the bottom of the upper plastic body, and the sealing ring seals the first pole hole and the second pole hole respectively.

[0011] Optionally, a limit groove is provided on the top surface of the brim, the limit stopper is engaged and connected to the limit groove, and the brim is arranged around the periphery of the limit stop ring.

[0012] Optionally, the limit stop ring covers the top surface of the brim.

[0013] Optionally, the two limit stop rings are respectively welded to the top of the positive electrode column and the top of the negative electrode column.

[0014] Optionally, an explosion-proof valve hole is provided between the first pole hole and the second pole hole on the main body, an explosion-proof valve is sealed at the bottom of the explosion-proof valve hole, and a protective sheet is provided on the top surface of the explosion-proof valve hole.

[0015] Optionally, the limit stop ring is an aluminum ring.

[0016] Optionally, the cross-sections of the positive electrode column and the negative electrode column are any one of square, circular, elliptical, rectangular, regular polygonal or rhombus, and the upper plastic body and the limit stop ring are both annular structures matching the positive electrode column / negative electrode column.

[0017] The present invention provides a processing technology for a battery top cover structure, which is applied to processing the battery top cover structure as described above, and comprises:

[0018] In the first step, a cover plate sheet and a lower plastic plate are processed, and the cover plate sheet is laminated on the top surface of the lower plastic plate to form a body;

[0019] The second step is to insert the positive electrode column and the negative electrode column into the first electrode column hole and the second electrode column hole respectively, and make the first boss abut against the first clamping groove, and the second boss abut against the second clamping groove;

[0020] The third step is to respectively embed the upper plastic body in the gap between the positive electrode column and the first electrode hole and in the gap between the negative electrode column and the second electrode hole;

[0021] The fourth step is to press the limit stop ring against a preset position on the top surface of the brim portion, and weld the two limit stop rings to the top of the positive pole and the negative pole respectively.

[0022] Optionally, the battery top cover structure further includes a sealing ring, and between step one and step two, the following steps are further included:

[0023] The sealing rings are respectively sleeved on the positive electrode column and the negative electrode column.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the limit ring plays a role of limiting and fixing the upper plastic body, the cover plate and the lower plastic plate are clamped and fixed by the joint action of the upper plastic body and the pole, and the assembly of the battery top cover structure is completed. The gap between the cover plate and the lower plastic plate is eliminated by the upper plastic body, and the structure of the battery top cover is firm and reliable. During the installation process, if defective poles, cover plates or lower plastic plates are found, they can be replaced in time by disassembly and replacement, which is convenient and fast and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0027] Figure 1 It is a schematic diagram of the component breakdown structure of the battery top cover structure;

[0028] Figure 2 It is a structural schematic diagram of a battery top cover structure;

[0029] Figure 3 It is one of the cross-sectional structural schematic diagrams of the battery top cover structure;

[0030] Figure 4 This is the second schematic diagram of the cross-sectional structure of the battery top cover structure.

[0031] Illustration: body 1, positive pole 2, negative pole 3, cover plate 11, lower plastic plate 12, first pole hole 13, second pole hole 14, first clamping groove 121, second clamping groove 122, first boss 21, limit ring 4, upper plastic body 5, cap brim 51, second boss 31, sealing ring 6, explosion-proof valve hole 15, explosion-proof valve 7, protective sheet 8, limit groove 511. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] Embodiment 1:

[0036] The present invention provides a battery top cover structure, comprising a body 1, a positive electrode column 2 and a negative electrode column 3, wherein the body 1 comprises a cover plate sheet 11 and a lower plastic plate 12 which are stacked in sequence, and two sides of the body 1 are respectively provided with a first electrode hole 13 for accommodating the positive electrode column 2 and a second electrode hole 14 for accommodating the negative electrode column 3, and a first clamping groove 121 communicating with the first electrode hole 13 and a second clamping groove 122 communicating with the second electrode hole 14 are formed on the bottom surface of the lower plastic plate 12;

[0037] The bottom surface of the positive pole 2 is provided with a first boss 21, one end surface of the positive pole 2 passes through the first pole hole 13 and a limit stop ring 4 is provided at the top thereof, and the first boss 21 abuts against the first clamping groove 121; an upper plastic body 5 is embedded between the positive pole 2 and the first pole hole 13, and a brim 51 is provided on the top surface of the upper plastic body 5 extending outward, and the top surface of the brim 51 abuts against the limit stop ring 4;

[0038] A second boss 31 is provided on the bottom surface of the negative electrode column 3, one end surface of the negative electrode column 3 passes through the second electrode hole 14 and the limit stop ring 4 is provided on the top thereof, and the second boss 31 abuts against the second clamping groove 122; the upper plastic body 5 is embedded between the positive electrode column 2 and the second electrode hole 14, and the top surface of the cap brim 51 abuts against the limit stop ring 4.

[0039] During operation, the cover plate 11 is stacked on the top surface of the lower plastic plate 12 to form the main body 1, the positive pole 2 and the negative pole 3 are respectively inserted into the first pole hole 13 and the second pole hole 14, and the first boss 21 is abutted against the first clamping groove 121, and the second boss 31 is abutted against the second clamping groove 122; the upper plastic body 5 is respectively embedded in the gap between the positive pole 2 and the first pole hole 13 and the gap between the negative pole 3 and the second pole hole 14; the limit stop ring 4 is abutted against the preset position on the top surface of the cap brim 51, and the two limit stop rings 4 are respectively welded to the top of the positive pole 2 and the negative pole 3.

[0040] The limiting retaining ring 4 has the function of limiting and fixing the upper plastic body 5. The cover plate 11 and the lower plastic plate 12 are clamped and fixed by the joint action of the upper plastic body 5 and the pole, and the assembly of the battery top cover structure is completed. Compared with the method of welding the pole to the cover plate 11 in the prior art, the problem of the pole offsetting the welding hole during the welding process is avoided. The gap between the cover plate 11 and the lower plastic plate 12 is eliminated by the upper plastic body 5, and the structure of the battery top cover is firm and reliable, and easy to install. At the same time, during the installation process, if defective poles, cover plates 11 or lower plastic plates 12 are found, they can be replaced in time by disassembly and replacement, which is convenient and fast, and saves costs.

[0041] In this embodiment, a sealing ring 6 is provided at the bottom of the upper plastic body 5, and the sealing ring 6 is respectively sealed in the first pole hole 13 and the second pole hole 14. The sealing ring 6 is provided between the upper plastic body 5 and the side wall of the pole hole for gas sealing, thereby ensuring the overall air tightness of the battery cover, avoiding air leakage during use, and ensuring the safety performance of the battery cover.

[0042] Specifically, an explosion-proof valve hole 15 is arranged between the first pole hole 13 and the second pole hole 14 on the main body 1, the bottom of the explosion-proof valve hole 15 is sealed and connected with the explosion-proof valve 7, and the top surface of the explosion-proof valve hole 15 is provided with a protective sheet 8 to avoid the problem of puncturing the explosion-proof valve 7 due to misoperation, and the safety performance is good.

[0043] In this embodiment, a limit groove 511 is disposed on the top surface of the brim portion 51, the limit stopper is engaged with the limit groove 511, and the brim portion 51 is disposed around the limit stop ring 4. Figure 2 As shown, the brim 51 of the upper plastic body 5 surrounds the outer side of the limit stop ring 4, wherein the preferred solution is: the top surface of the limit stop ring 4 occupies 40% of the sum of the top surface areas of the two, thereby ensuring the structural stability of the limit stop ring 4 and making the structure beautiful and practical.

[0044] In this embodiment, the limit stop ring 4 covers the top surface of the brim 51, and the top surface of the limit stop ring 4 completely covers the top surface of the upper plastic body 5. The top surface of the limit stop ring 4 occupies 100% of the sum of the top surface areas of the two, making the overall structure beautiful and firm.

[0045] In this embodiment, the two limit stop rings 4 are respectively welded to the top of the positive pole 2 and the top of the negative pole 3. Preferably, the limit stop ring 4 is an aluminum ring. The aluminum ring is welded to the pole to achieve the fixed installation of the battery cover, and the aluminum ring has good stability and low cost.

[0046] In this embodiment, the cross-sections of the positive electrode column 2 and the negative electrode column 3 are any one of square, circular, elliptical, rectangular, regular polygonal or rhombus, and the upper plastic body 5 and the limit stop ring 4 are both annular structures matching the positive electrode column 2 / negative electrode column 3.

[0047] Embodiment 2:

[0048] The present invention further provides a processing technology for a battery top cover structure, which is applied to processing the battery top cover structure as described in the first embodiment, comprising:

[0049] In the first step, a cover plate sheet and a lower plastic plate are processed, and the cover plate sheet is laminated on the top surface of the lower plastic plate to form a body;

[0050] The second step is to insert the positive electrode column and the negative electrode column into the first electrode column hole and the second electrode column hole respectively, and make the first boss abut against the first clamping groove, and the second boss abut against the second clamping groove;

[0051] The third step is to respectively embed the upper plastic body in the gap between the positive electrode column and the first electrode hole and in the gap between the negative electrode column and the second electrode hole;

[0052] The fourth step is to press the limit stop ring against the preset position on the top surface of the brim, and weld the two limit stop rings to the positive pole and the negative pole respectively, so that the limit stop ring plays a role of limiting and fixing the upper plastic body.

[0053] During operation, the pole and the upper plastic body are sequentially installed on the main body, the upper plastic body eliminates the gap between the cover plate and the lower plastic plate, and then the limit rings are respectively welded to the positive pole and the negative pole, and the cover plate and the lower plastic plate are clamped and fixed. The overall structure is firm and reliable, and easy to install. At the same time, during the installation process, if defective poles, cover plates or lower plastic plates are found, they can be replaced in time by disassembly and replacement, which is convenient and fast, and saves costs.

[0054] In this embodiment, the battery top cover structure further includes a sealing ring, and between step one and step two, the following steps are further included:

[0055] The sealing rings are respectively sleeved on the positive pole and the negative pole, and the positive pole and the negative pole sleeved with the sealing rings are respectively inserted into the first pole hole and the second pole hole to carry out the next step of assembly, thereby ensuring the airtightness of the battery cover.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery top cover structure, comprising a body (1), a positive electrode column (2) and a negative electrode column (3), wherein the body (1) comprises a cover plate (11) and a lower plastic plate (12) stacked in sequence, and two sides of the body (1) are respectively provided with a first electrode hole (13) for accommodating the positive electrode column (2) and a second electrode hole (14) for accommodating the negative electrode column (3), characterized in that: The bottom surface of the lower plastic plate (12) is provided with a first clamping groove (121) connected to the first pole hole (13) and a second clamping groove (122) connected to the second pole hole (14); The bottom surface of the positive pole (2) is provided with a first boss (21), one end surface of the positive pole (2) passes through the first pole hole (13) and a limit stop ring (4) is provided at the top thereof, and the first boss (21) abuts against the first clamping groove (121); an upper plastic body (5) is embedded between the positive pole (2) and the first pole hole (13), a brim portion (51) is provided on the top surface of the upper plastic body (5) extending outward, and the top surface of the brim portion (51) abuts against the limit stop ring (4); The bottom surface of the negative pole (3) is provided with a second boss (31), one end surface of the negative pole (3) passes through the second pole hole (14) and the top end is provided with the limit stop ring (4), and the second boss (31) abuts against the second clamping groove (122); the upper plastic body (5) is embedded between the positive pole (2) and the second pole hole (14), and the top surface of the cap edge (51) abuts against the limit stop ring (4); A sealing ring (6) is provided at the bottom of the upper plastic body (5), and the sealing ring (6) is respectively sealed at the first pole hole (13) and the second pole hole (14); A limiting groove (511) is provided on the top surface of the brim portion (51), the limiting blocking piece is engaged and connected to the limiting groove (511), and the brim portion (51) is arranged around the periphery of the limiting blocking ring (4).

2. The battery top cover structure according to claim 1, characterized in that: The limit stop ring (4) covers the top surface of the brim portion (51).

3. The battery top cover structure according to claim 1, characterized in that: The two limit stop rings (4) are respectively welded to the top of the positive pole (2) and the top of the negative pole (3).

4. The battery top cover structure according to claim 1, characterized in that: An explosion-proof valve hole (15) is provided between the first pole hole (13) and the second pole hole (14) on the body (1), the bottom of the explosion-proof valve hole (15) is sealedly connected to an explosion-proof valve (7), and the top surface of the explosion-proof valve hole (15) is provided with a protective sheet (8).

5. The battery top cover structure according to claim 3, characterized in that: The limit stop ring (4) is an aluminum ring.

6. The battery top cover structure according to claim 1, characterized in that: The cross-sections of the positive electrode column (2) and the negative electrode column (3) are any one of circular, elliptical, rectangular, regular polygonal or rhombus-shaped, and the upper plastic body (5) and the limit stop ring (4) are both annular structures matching the positive electrode column (2) / negative electrode column (3).

7. A processing technology for a battery top cover structure, applied to processing the battery top cover structure as claimed in any one of claims 1 to 6, characterized in that: include: In the first step, a cover plate sheet and a lower plastic plate are processed, and the cover plate sheet is laminated on the top surface of the lower plastic plate to form a body; The second step is to insert the positive electrode column and the negative electrode column into the first electrode column hole and the second electrode column hole respectively, and make the first boss abut against the first clamping groove, and the second boss abut against the second clamping groove; The third step is to respectively embed the upper plastic body in the gap between the positive electrode column and the first electrode hole and in the gap between the negative electrode column and the second electrode hole; The fourth step is to press the limit stop ring against a preset position on the top surface of the brim portion, and weld the two limit stop rings to the top of the positive pole and the negative pole respectively.

8. The processing technology of the battery top cover structure according to claim 7, characterized in that: The battery top cover structure also includes a sealing ring, and between step one and step two, the following steps are included: The sealing rings are respectively sleeved on the positive electrode column and the negative electrode column.

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