Cover plate assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a single battery. The cover plate assembly comprises a cover plate body, a pole and a plastic part, a mounting hole is formed in the cover plate body, a clamping groove is formed in the top wall of the cover plate body and located in the circumferential direction of the mounting hole, the clamping groove comprises a first part and a second part which are sequentially arranged from top to bottom, and the inner diameter of the second part is larger than that of the first part; at least part of the poles are arranged in the mounting holes; the plastic part is provided with a connecting hole, and the pole penetrates through the connecting hole; a clamping protrusion is arranged on the bottom wall of the plastic part in a protruding mode, and the clamping protrusion and the clamping groove are clamped and fixed in a matched mode. The cover plate assembly is simple in structure, the steps of the welding procedure are reduced, the links and cost of the production process can be reduced, the insulativity is improved, and the use safety is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a single battery. Background Art

[0002] In the existing technology, there are two main ways to connect the pole and the cover plate. One is a simplified structure: the pole and the welding ring are first separately coated with glue and injection molded, and then the resulting assembly is welded to the plain aluminum sheet. This structure has an additional welding ring and welding process in terms of cost. At the same time, with this structure, the gap between the pole, the sealing ring and the plain aluminum sheet cannot be avoided, and thus the risk of insulation failure between the pole and the cover plate cannot be completely avoided. The other structure is an injection molding structure: the assembly order is to first place the pole, the sealing ring, the lower plastic, and the plain aluminum sheet, and then perform mold closing and coating. The main cost of this structure comes from the friction welding and machining of the negative pole. The pole is also stamped and formed by a composite plate, and the pole manufacturing cost is relatively high. At the same time, with this structure, the gap between the pole, the sealing ring and the plain aluminum sheet cannot be avoided, and thus the risk of insulation failure cannot be completely avoided.

[0003] Therefore, there is an urgent need to provide a new type of cover plate assembly and single battery to solve the above technical problems in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a cover plate assembly, which can simplify the structure of the cover plate assembly, simplify the production process, reduce the production cost, and improve the insulation and safety of use.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The cover plate assembly includes a cover plate body, a pole and a plastic part. The cover plate body is provided with a mounting hole. The top wall of the cover plate body is provided with a clamping groove located in the circumference of the mounting hole. The clamping groove includes a first part and a second part arranged in sequence from top to bottom. The inner diameter of the second part is larger than the inner diameter of the first part. At least part of the pole is arranged in the mounting hole. The plastic part is provided with a connecting hole, and the pole is passed through the connecting hole. The bottom wall of the plastic part is provided with a clamping protrusion, and the clamping protrusion is clamped and fixed in cooperation with the clamping groove.

[0007] Optionally, the inner wall of the first part is formed into a cylindrical shape, the top port of the second part is connected to the bottom port of the first part, and the inner diameter of at least part of the second part gradually increases from top to bottom to form a gradually expanding section.

[0008] Optionally, the second part includes the gradually expanding section and the cylindrical section arranged in sequence from top to bottom, the top port of the gradually expanding section is equal to the inner diameter of the first part, and the bottom port of the gradually expanding section is equal to the inner diameter of the cylindrical section.

[0009] Optionally, the above-mentioned clamping groove further includes a step portion arranged above the above-mentioned first portion, and the inner diameter of the above-mentioned step portion is larger than the inner diameter of the above-mentioned first portion, so that a step structure is formed between the above-mentioned step portion and the above-mentioned first portion.

[0010] Optionally, a gap structure is formed between the pole and the top wall of the cover body, and a filling portion is radially protruded from the inner wall of the connecting hole of the plastic component, and the filling portion is cooperatively arranged in the gap structure.

[0011] Optionally, the cover plate assembly further includes a seal, which includes a gap portion and an insulating portion perpendicular to each other, the insulating portion being clamped between the inner wall of the mounting hole and the circumferential outer wall of the pole, the gap portion being cooperatively arranged in the gap structure, and the circumferential inner wall of the filling portion being in contact with the circumferential outer wall of the gap portion.

[0012] Optionally, the above-mentioned pole includes an upper pole and a lower pole, the bottom wall of the above-mentioned upper pole abuts against the top wall of the above-mentioned lower pole, and the above-mentioned lower pole is cooperatively installed in the above-mentioned mounting hole; the inner wall of the connecting hole of the above-mentioned plastic part is radially protruded with a clamping portion, and the bottom wall of the above-mentioned clamping portion abuts against the above-mentioned upper pole.

[0013] Optionally, a clamping groove is formed on the outer peripheral wall surface of the upper pole, and the clamping portion is accommodated in the clamping groove.

[0014] Optionally, the top wall of the clamping portion is not higher than the top wall of the upper pole.

[0015] Another object of the present invention is to provide a single cell battery, which includes the cover plate assembly as described in any of the above solutions.

[0016] Beneficial effects:

[0017] The cover plate assembly in the present invention is used to install the pole by opening a mounting hole on the cover plate body, and a clamping groove is opened in the circumference of the mounting hole, and the bottom wall of the plastic part is convexly provided with a clamping protrusion so as to be installed in cooperation with the clamping groove. At the same time, the plastic part is provided with a connecting hole for passing the pole, so as to fix the pole on the cover plate body; and the clamping groove includes a first part and a second part arranged up and down, and the inner diameter of the second part is larger than the inner diameter of the first part. When the clamping protrusion is fitted and installed in the clamping groove, the clamping protrusion in the second part can form a step structure with the clamping protrusion in the first part, so that the plastic part is firmly fixed on the cover plate body, ensuring a stable connection between the pole and the cover plate body. The structure of the cover plate assembly is simple, the steps of the welding process are reduced, the links and costs of the production process can be reduced, and the insulation performance is improved, and the safety of use is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric view of the cover assembly provided by a specific embodiment of the present utility model;

[0019] Figure 2 It is a longitudinal cross-sectional view of a cover plate assembly provided in a specific embodiment of the present utility model;

[0020] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0021] In the picture:

[0022] 100, cover body; 110, mounting hole; 120, snap-fit groove; 121, first portion; 122, second portion; 1221, gradually expanding section; 1222, cylindrical section; 123, stepped portion;

[0023] 200, pole; 210, upper pole; 211, snap-fit groove; 220, lower pole;

[0024] 300, plastic part; 310, snap-fit protrusion; 320, filling portion; 330, snap-fit portion;

[0025] 400, sealing member; 410, gap portion; 420, insulating portion;

[0026] 510, explosion-proof valve; 520, lower plastic parts. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] Please refer to Figures 1 to 2 In this embodiment, the cover assembly includes a cover body 100, a pole 200 and a plastic part 300. The cover body 100 is provided with a mounting hole 110. A clamping groove 120 is provided on the top wall of the cover body 100 and is located circumferentially of the mounting hole 110. The clamping groove 120 includes a first portion 121 and a second portion 122 arranged in sequence from top to bottom. The inner diameter of the second portion 122 is larger than the inner diameter of the first portion 121. At least part of the pole 200 is arranged in the mounting hole 110. The plastic part 300 is provided with a connecting hole, and the pole 200 is passed through the connecting hole. A clamping protrusion 310 is protruded from the bottom wall of the plastic part 300, and the clamping protrusion 310 is engaged and fixed with the clamping groove 120.

[0032] The cover assembly in this embodiment is provided with a mounting hole 110 on the cover body 100 for mounting the pole 200, and a snap-fit groove 120 is provided in the circumference of the mounting hole 110. The bottom wall of the plastic part 300 is provided with a snap-fit protrusion 310 so as to be mounted in conjunction with the snap-fit groove 120. At the same time, the plastic part 300 is provided with a connecting hole for passing the pole 200, thereby fixing the pole 200 on the cover body 100; and the snap-fit groove 120 includes a first portion 121 and a second portion 122 arranged above and below, and the inner diameter of the second portion 122 is larger than that of the first portion 120. 21, when the snap-fitting protrusion 310 is fitted into the snap-fitting groove 120, a step structure is formed between the snap-fitting protrusion 310 in the second portion 122 and the snap-fitting protrusion 310 in the first portion 121, so that the plastic part 300 is firmly fixed to the cover body 100, ensuring a firm connection between the pole 200 and the cover body 100. The structure of the cover assembly is simple, the steps of the welding process are reduced, the links and costs of the production process can be reduced, and the insulation and safety of use are improved.

[0033] In this embodiment, a plurality of snap-fit grooves 120 are evenly spaced along the circumference of the mounting hole 110, thereby improving the stability of the connection between the plastic part 300 and the cover body 100; alternatively, the snap-fit grooves 120 are annularly arranged along the circumference of the mounting hole 110, which can also improve the stability of the connection between the plastic part 300 and the cover body 100, which will not be repeated here.

[0034] It should be noted that the plastic part 300 in this embodiment is formed integrally by injection molding after the pole 200 and the cover body 100 are positioned and assembled. The operation is simple and convenient, and the gaps can also be filled by injection molding, thereby improving the connection stability and insulation reliability.

[0035] like Figure 1 and Figure 2 As shown, the cover assembly in this embodiment also includes an explosion-proof valve 510 and a lower plastic part 520. The explosion-proof valve 510 is arranged between the positive electrode column 200 and the negative electrode column 200; the lower plastic part 520 is arranged on the bottom wall of the cover body 100, forming insulation between the electrode column 200 and the core package in the battery and the bottom wall of the cover body 100, avoiding short circuit and leakage, and improving safety in use.

[0036] like Figure 3As shown, the inner wall of the first portion 121 is formed into a cylindrical shape, the top port of the second portion 122 is connected to the bottom port of the first portion 121, and the inner diameter of at least a portion of the second portion 122 gradually increases from top to bottom to form a gradually expanding section 1221. The inner diameter of the gradually expanding section 1221 gradually increases from top to bottom, so that the clamping protrusion 310 forms a stepped structure, firmly clamping the clamping protrusion 310 to the first portion 121 and the second portion 122. It should be noted that the gradually increasing inner diameter of the gradually expanding section 1221 can be linear, inclined, or arc-shaped; or the second portion 122 can be wavy, serrated, etc., which is not specifically limited in this embodiment.

[0037] Furthermore, the second portion 122 includes the gradually expanding section 1221 and the cylindrical section 1222, arranged sequentially from top to bottom. The top end of the gradually expanding section 1221 has the same inner diameter as the first portion 121, and the bottom end of the gradually expanding section 1221 has the same inner diameter as the cylindrical section 1222. This configuration of the second portion 122, after the latching protrusion 310 is injection-molded, allows for a smoother connection between the first portion 121, the gradually expanding section 1221, and the cylindrical section 1222, reducing stress at the connection. This increases the service life and reliability of the latching protrusion 310 and further enhances the stability of the connection between the plastic component 300 and the cover body 100.

[0038] As a preferred embodiment, the engaging groove 120 further includes a stepped portion 123 disposed above the first portion 121. The inner diameter of the stepped portion 123 is larger than the inner diameter of the first portion 121, thereby forming a stepped structure between the stepped portion 123 and the first portion 121. The provision of the stepped structure can increase the contact area between the plastic component 300 and the cover body 100, thereby further improving the connection stability between the two, preventing the engaging protrusion 310 of the plastic component 300 from deforming within the engaging groove 120, and thus improving the insulation effect of the plastic component 300.

[0039] Please continue to refer to Figure 3 A gap is formed between the terminal 200 and the top wall of the cover body 100. A filling portion 320 is radially protruded from the inner wall of the connection hole of the plastic component 300. The filling portion 320 is positioned within the gap. The filling portion 320 not only fills the gap between the terminal 200 and the cover body 100, preventing insulation failure caused by contact between the terminal 200 and the cover body 100, but also increases the contact area between the plastic component 300, the terminal 200, and the cover body 100, thereby improving insulation performance.

[0040] Furthermore, the cover plate assembly further includes a seal 400, which includes a mutually perpendicular gap portion 410 and an insulating portion 420. The insulating portion 420 is sandwiched between the inner wall of the mounting hole 110 and the circumferential outer wall of the terminal 200. The gap portion 410 is cooperatively disposed within the gap structure, and the circumferential inner wall of the filling portion 320 abuts the circumferential outer wall of the gap portion 410. The provision of the seal 400 insulates the terminal 200 from the mounting hole 110, while the filling portion 320 insulates the lower bottom wall of the terminal 200 from the cover plate body 100. The circumferential inner wall of the filling portion 320 abuts the circumferential outer wall of the gap portion 410, completely filling the gap structure, improving insulation effectiveness, and preventing insulation failure.

[0041] In this embodiment, the electrode 200 includes an upper electrode 210 and a lower electrode 220. The bottom wall of the upper electrode 210 abuts the top wall of the lower electrode 220, and the lower electrode 220 is cooperatively mounted in the mounting hole 110. The inner wall of the connection hole of the plastic part 300 is provided with a radially protruding clamping portion 330, and the bottom wall of the clamping portion 330 abuts the upper electrode 210. It should be noted that the negative electrode 200 is made of a composite of copper and aluminum, and thus is formed into an upper electrode 210 and a lower electrode 220. The positive electrode 200 is made only of aluminum and therefore does not need to be configured as a combination of an upper electrode 210 and a lower electrode 220. A snap-fit portion 330 is radially protruded from the inner wall of the connection hole of the plastic part 300. The bottom wall of the snap-fit portion 330 abuts against the upper pole 210, thereby squeezing and fixing the upper pole 210 and the lower pole 220 to the top wall of the cover body 100. This fixes the upper pole 210 and the lower pole 220 to form the pole 200, reduces the steps of welding or stamping, simplifies the production process, and reduces production costs.

[0042] Furthermore, the outer wall of the upper terminal 210 is recessed with a snap-fitting groove 211, and the snap-fitting portion 330 is cooperatively accommodated in the snap-fitting groove 211. This arrangement of the plastic component 300 and the terminal 200 can reduce the circumferential and height space occupied by the plastic component 300, thereby reducing the space occupied by the cover plate assembly and increasing the energy density of the single battery using the cover plate assembly.

[0043] Likewise, the top wall of the clamping portion 330 is not higher than the top wall of the upper pole 210 , which can also reduce the height space occupied by the plastic component 300 , thereby increasing the energy density of the single battery using the cover assembly.

[0044] This embodiment further provides a single cell battery, which includes the cover plate assembly as described in any of the above solutions. The single cell battery uses the above battery cover plate and has all the beneficial effects of the above battery cover plate, which will not be repeated here.

[0045] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Cover plate assembly, characterized in that, include: A cover plate body (100), wherein the cover plate body (100) is provided with a mounting hole (110), and a clamping groove (120) is provided on the top wall of the cover plate body (100) and located in the circumferential direction of the mounting hole (110), wherein the clamping groove (120) comprises a first portion (121) and a second portion (122) arranged in sequence from top to bottom, and the inner diameter of the second portion (122) is larger than the inner diameter of the first portion (121); A pole (200), at least a portion of the pole (200) is disposed in the mounting hole (110); A plastic part (300) is provided with a connection hole, and the pole (200) is passed through the connection hole; a clamping protrusion (310) is provided on the bottom wall of the plastic part (300), and the clamping protrusion (310) is fixedly engaged with the clamping groove (120) by clamping.

2. The cover plate assembly according to claim 1, wherein: The inner wall of the first part (121) is formed into a cylindrical shape, the top port of the second part (122) is connected to the bottom port of the first part (121), and the inner diameter of at least part of the second part (122) gradually increases from top to bottom to form a gradually expanding section (1221).

3. The cover plate assembly according to claim 2, wherein: The second part (122) comprises the gradually expanding section (1221) and the cylindrical section (1222) arranged in sequence from top to bottom, the top port of the gradually expanding section (1221) is equal to the inner diameter of the first part (121), and the bottom port of the gradually expanding section (1221) is equal to the inner diameter of the cylindrical section (1222).

4. The cover plate assembly according to claim 2, wherein: The clamping groove (120) further includes a step portion (123) arranged above the first portion (121), wherein the inner diameter of the step portion (123) is larger than the inner diameter of the first portion (121), so that a step structure is formed between the step portion (123) and the first portion (121).

5. The cover plate assembly according to claim 1, wherein: A gap structure is formed between the pole (200) and the top wall of the cover plate body (100), and a filling portion (320) is radially protruded from the inner wall of the connection hole of the plastic part (300), and the filling portion (320) is arranged in cooperation with the gap structure.

6. The cover plate assembly according to claim 5, wherein: The cover plate assembly further includes a sealing member (400), the sealing member (400) including a gap portion (410) and an insulating portion (420) perpendicular to each other, the insulating portion (420) being sandwiched between the inner wall of the mounting hole (110) and the circumferential outer wall of the pole (200), the gap portion (410) being cooperatively arranged in the gap structure, and the circumferential inner wall of the filling portion (320) being in contact with the circumferential outer wall of the gap portion (410).

7. The cover plate assembly according to claim 1, wherein: The pole (200) comprises an upper pole (210) and a lower pole (220), the bottom wall of the upper pole (210) abuts against the top wall of the lower pole (220), and the lower pole (220) is mounted in cooperation with the mounting hole (110); a clamping portion (330) is radially protruded from the inner wall of the connecting hole of the plastic part (300), and the bottom wall of the clamping portion (330) abuts against the upper pole (210).

8. The cover plate assembly according to claim 7, wherein: A clamping groove (211) is concavely provided on the outer peripheral wall surface of the upper pole (210), and the clamping portion (330) is accommodated in the clamping groove (211).

9. The cover plate assembly according to claim 8, wherein: The top wall of the clamping portion (330) is not higher than the top wall of the upper pole (210).

10. A single cell battery, characterized in that: The invention comprises the cover plate assembly according to any one of claims 1 to 9.

Images