Cylindrical battery cover plate, single battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a cylindrical battery cover plate, a single battery and electric equipment. The cylindrical battery cover plate comprises a cover plate body, a pole piece, a lower plastic piece and a sealing ring, wherein the cover plate body is provided with a pole mounting hole; the bottom of the pole piece comprises a riveting part, the pole piece is arranged in the pole mounting hole in a penetrating manner, and an avoiding space is formed between the circumferential outer wall of the pole piece and the circumferential inner wall of the pole mounting hole; the lower plastic part is clamped between the riveting part and the bottom wall of the cover plate body, the lower plastic part is provided with a first connecting hole through which the pole part penetrates, and the first connecting hole is provided with a protruding part protruding towards the avoiding space; the sealing ring is provided with a second connecting hole through which the pole piece penetrates, an avoiding groove is concavely formed in the bottom of the sealing ring, and the convex part is accommodated in the avoiding groove and the avoiding space. According to the cylindrical battery cover plate, the sealing ring can be prevented from extruding the lower plastic, the deformation of the lower plastic is avoided, the insulation effect is improved, and the use safety and reliability of the cylindrical battery cover plate are improved.

Description

Technical Field

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

[0002] Batteries, as energy storage units, are increasingly being used in the electric vehicle and energy storage industries. Battery packaging designs are categorized into three types: square, soft-pack, and cylindrical. The cylindrical cell cover is used to mount components such as the pole. During pole installation, a sealing ring is required to seal and insulate the circumferential sidewalls of the pole. A lower plastic seal is then used to insulate the pole from the bottom wall of the cover, preventing short circuits or leakage between the pole and cover, thereby improving battery safety.

[0003] However, in the prior art installation process of the pole, lower plastic, and sealing ring, the riveting process used causes the lower plastic to bulge upward. When the sealing ring is pressed down, it squeezes the bulged portion of the lower plastic, causing the sealing ring to shift, reducing the insulation effect. The service life of the lower plastic is also affected by the deformation.

[0004] Therefore, there is an urgent need to provide a new cylindrical battery cover, single battery and electrical equipment to solve the above technical problems in the prior art. Utility Model Content

[0005] One purpose of the present utility model is to provide a cylindrical battery cover, which can avoid the sealing ring from squeezing the lower plastic, avoid deformation of the lower plastic, improve the insulation effect, and improve the safety and reliability of the cylindrical battery cover.

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

[0007] The cylindrical battery cover includes a cover body, a pole piece, a lower plastic piece and a sealing ring. The cover body is provided with a pole mounting hole; the bottom of the pole piece includes a rivet portion, the pole piece is arranged through the pole mounting hole, and an escape space is provided between the circumferential outer wall of the pole piece and the circumferential inner wall of the pole mounting hole; the lower plastic piece is clamped between the rivet portion and the bottom wall of the cover body, the lower plastic piece is provided with a first connecting hole through which the pole piece is arranged, and the first connecting hole is provided with a protrusion protruding toward the escape space; the sealing ring is provided with a second connecting hole through which the pole piece is arranged, the bottom of the sealing ring is recessed with an escape groove, and the protrusion is accommodated in the escape groove and the escape space.

[0008] Optionally, the avoidance groove is opened at the bottom port of the second connecting hole, so that a step structure is formed at the bottom port of the second connecting hole.

[0009] Optionally, the inner diameter of the groove side wall of the above-mentioned avoidance groove is the same as the inner diameter of the above-mentioned pole post mounting hole.

[0010] Optionally, the top of the above-mentioned pole post member includes a crimping portion, and the above-mentioned sealing ring is clamped between the above-mentioned crimping portion and the top wall of the above-mentioned cover plate body.

[0011] Optionally, the upper and lower ends of the above-mentioned sealing ring are respectively in interference connection with the top wall of the above-mentioned cover plate body and the bottom wall of the above-mentioned crimping portion.

[0012] Optionally, the outer diameter of the above-mentioned crimping portion is greater than the outer diameter of the above-mentioned sealing ring.

[0013] Optionally, the above-mentioned cylindrical battery cover plate further includes an annular connecting member, a limiting groove for fitting and installing the above-mentioned crimping portion is provided on the top wall of the above-mentioned annular connecting member, and the inner diameter of the above-mentioned annular connecting member is greater than the outer diameter of the above-mentioned sealing ring.

[0014] Another object of the present invention is to provide a single cell, which includes the cylindrical battery cover plate described in any of the above solutions.

[0015] Optionally, the above-mentioned single cell further includes a battery housing, and the above-mentioned cover plate body and the above-mentioned battery housing are integrally formed.

[0016] Another object of the present invention is to provide an electrical device, which includes a plurality of single cells described in any of the above solutions.

[0017] Beneficial effects:

[0018] In the cylindrical battery cover plate of the present invention, a pole post mounting hole for installing a pole post member is provided on the cover plate body, and an avoidance space is formed between the pole post member and the pole post mounting hole. After the pole post member is press-riveted, a riveted portion is formed, and the riveted portion presses and fixes the lower plastic part on the bottom wall of the cover plate body. The convex portion at the first connection hole of the lower plastic part protrudes upward and is accommodated in the avoidance space. At the same time, the pole post member passes through the second connection hole of the sealing ring, and an avoidance groove is provided at the bottom of the sealing ring, so that the top of the convex portion is accommodated in the avoidance groove. After the press-riveting connection is fixed, the convex portion of the lower plastic part is accommodated in the avoidance space and the accommodation groove, so that the bottom of the sealing ring does not squeeze the convex portion of the lower plastic part, thereby not causing deformation of the lower plastic part, ensuring the insulation effect of the lower plastic part and the sealing ring, ensuring that the service life of the lower plastic part is not affected, and further improving the use reliability and safety of the single cell using the cylindrical battery cover plate. Description of the drawings

[0019] Figure 1 It is an exploded view of some components of the single cell provided by the specific embodiment of the present invention;

[0020] Figure 2It is a longitudinal sectional view of some components of a single battery provided by the specific embodiment of the present utility model;

[0021] Figure 3 is Figure 2 a partial enlarged view of the position A in

[0022] In the figure:

[0023] 100, cover body; 110, pole post mounting hole; 111, avoidance space; 120, battery housing;

[0024] 200, pole post component; 210, riveting part; 220, crimping part;

[0025] 300, lower plastic part; 310, first connection hole; 320, protruding part;

[0026] 400, sealing ring; 410, second connection hole; 420, avoidance groove; 421, groove side wall;

[0027] 500, annular connecting part; 510, limiting groove. Specific embodiment

[0028] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through other features between them. Moreover, the first feature being "above", "above the top", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the bottom", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0031] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] Please refer to Figures 1 to 3 , in this embodiment, the cylindrical battery cover plate includes a cover plate body 100, a pole piece 200, a lower plastic part 300, and a sealing ring 400. The cover plate body 100 is provided with a pole installation hole 110; the bottom of the pole piece 200 includes a riveting part 210. The pole piece 200 passes through the pole installation hole 110, and there is a clearance space 111 between the circumferential outer wall of the pole piece 200 and the circumferential inner wall of the pole installation hole 110; the lower plastic part 300 is clamped between the riveting part 210 and the bottom wall of the cover plate body 100. The lower plastic part 300 is provided with a first connection hole 310 passing through the pole piece 200, and a protruding part 320 protruding towards the clearance space 111 is provided at the first connection hole 310; the sealing ring 400 is provided with a second connection hole 410 passing through the pole piece 200, and a relief groove 420 is recessed at the bottom of the sealing ring 400. The protruding part 320 is accommodated in the relief groove 420 and the clearance space 111.

[0033] In the cylindrical battery cover plate of this embodiment, a pole installation hole 110 for installing the pole piece 200 is formed on the cover plate body 100, and a clearance space 111 is formed between the pole piece 200 and the pole installation hole 110. After the pole piece 200 is press-riveted and connected, a riveting part 210 is formed. The riveting part 210 presses and fixes the lower plastic part 300 to the bottom wall of the cover plate body 100, and the protruding part 320 at the first connection hole 310 of the lower plastic part 300 protrudes upward and is accommodated in the clearance space 111. At the same time, the second connection hole 410 of the sealing ring 400 passes through the pole piece 200, and a relief groove 420 is provided at the bottom of the sealing ring 400, so that the top of the protruding part 320 is accommodated in the relief groove 420. After the press-riveting connection is fixed, the protruding part 320 of the lower plastic part 300 is accommodated in the clearance space 111 and the receiving groove, so that the bottom of the sealing ring 400 does not squeeze the protruding part 320 of the lower plastic part 300, thereby not causing deformation of the lower plastic part 300, ensuring the insulation effect of the lower plastic part 300 and the sealing ring 400, ensuring that the service life of the lower plastic part 300 is not affected, and further improving the use reliability and safety of the single cell using this cylindrical battery cover plate.

[0034] Furthermore, the avoidance groove 420 is provided at the bottom end of the second connection hole 410, so as to form a step structure at the bottom end of the second connection hole 410. The avoidance groove 420 provided here not only provides a good insulation effect, but also has a simple structure and low installation cost, thereby reducing manufacturing costs.

[0035] It is conceivable that the avoidance groove 420 can also be opened at any position on the bottom of the sealing ring 400, for example, the longitudinal section of the sealing ring 400 can be made into a "冂" shape, thereby improving the insulation effect, but the manufacturing cost is relatively high and will not be repeated here.

[0036] In this embodiment, the inner diameter of the sidewall 421 of the avoidance groove 420 is the same as the inner diameter of the pole mounting hole 110. This arrangement of the avoidance groove 420 and the avoidance space 111 formed by the pole mounting hole 110 forms a complete cylindrical ring, preventing the formation of a step between the avoidance groove 420 and the avoidance space 111. This prevents the protrusion 320 from colliding with the step, ensuring that the protrusion 320 is not squeezed and deformed, and maintaining the insulation effect of the lower plastic component 300 and the sealing ring 400.

[0037] Please continue to refer to Figure 3 The top of the pole piece 200 includes a crimping portion 220, and the sealing ring 400 is sandwiched between the crimping portion 220 and the top wall of the cover body 100. The crimping portion 220 can firmly squeeze and fix the sealing ring 400 to the top wall of the cover body 100, preventing the sealing ring 400 from falling off.

[0038] Furthermore, the upper and lower ends of the sealing ring 400 are respectively connected to the top wall of the cover body 100 and the bottom wall of the crimping portion 220. The interference fit improves the sealing effect between the sealing ring 400 and the top wall of the cover body 100 and the bottom wall of the crimping portion 220, and ensures that the sealing ring 400 is compressed and fixed, preventing the sealing ring 400 from loosening due to vibration during transportation, and ensuring that the insulation effect between the sealing ring 400, the pole member 200, and the cover body 100 is not affected.

[0039] In this embodiment, the outer diameter of the crimping portion 220 is larger than the outer diameter of the sealing ring 400. This arrangement allows the sealing ring 400 to be completely pressed and fixed to the top wall of the cover body 100 by the crimping portion 220, thereby increasing the contact area, thereby improving the sealing and insulation effects, and also improving the stability and reliability of the connection.

[0040] Optionally, the cylindrical battery cover further includes an annular connector 500. The top wall of the annular connector 500 is provided with a retaining groove 510 for cooperating with the crimping portion 220. The inner diameter of the annular connector 500 is greater than the outer diameter of the sealing ring 400. The retaining groove 510 of the annular connector 500 can be cooperating and fixed with the pressing portion, thereby enabling the annular connector 500 to circumferentially position and retain the terminal, thereby improving the connection stability of the terminal member 200 when installed in the terminal mounting hole 110, and improving the reliability of the single battery using the cylindrical battery cover.

[0041] Return Reference Figure 1 and Figure 2 This embodiment further provides a single cell battery, comprising the cylindrical battery cover described in any of the above-mentioned solutions. This single cell battery utilizes the cylindrical battery cover described in any of the above-mentioned solutions, thereby achieving all the beneficial effects of the cylindrical battery cover described in any of the above-mentioned solutions. In particular, the bottom portion of the sealing ring 400 is prevented from squeezing the raised portion 320 of the lower plastic part 300, thereby preventing deformation of the lower plastic part 300. This ensures the insulation between the lower plastic part 300 and the sealing ring 400, ensuring that the service life of the lower plastic part 300 is not affected, and thereby improving the reliability and safety of the single cell battery.

[0042] Furthermore, the above-mentioned single cell also includes a battery housing 120, and the above-mentioned cover plate body 100 is integrally formed with the above-mentioned battery housing 120. In this embodiment, the single cell is a cylindrical battery, and the battery housing 120 is cylindrical. The cover plate body 100 on the top of the battery housing 120 is integrally formed with the battery housing 120, which can simplify the production process and reduce production costs. At the same time, the bottom opening of the battery housing 120 is used to place the core pack or for various equipment to enter. For example, a riveting device is inserted through this bottom opening to rivet the pole piece 200 of the cylindrical battery cover to produce the desired cylindrical battery cover.

[0043] This embodiment further provides an electrical device comprising a plurality of single cells as described in any of the above-described solutions. The electrical device may be a battery module, battery pack, electric vehicle, electric bicycle, electric motorcycle, ship, energy storage system, or the like. This embodiment is not particularly limited to any specific device, as long as the single cells described above are used for power supply or energy storage. By using the single cells described above, the electrical device possesses all the benefits of the single cells described in any of the above-described solutions, which will not be further elaborated here.

[0044] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Cylindrical battery cover, characterized in that: include: A cover plate body (100), wherein the cover plate body (100) is provided with a pole mounting hole (110); A pole piece (200), wherein the bottom of the pole piece (200) includes a rivet portion (210), the pole piece (200) is inserted into the pole mounting hole (110), and an escape space (111) is provided between a circumferential outer wall of the pole piece (200) and a circumferential inner wall of the pole mounting hole (110); a lower plastic part (300), the lower plastic part (300) being sandwiched between the riveted portion (210) and the bottom wall of the cover plate body (100), the lower plastic part (300) being provided with a first connection hole (310) penetrating the pole part (200), and a protrusion (320) protruding toward the avoidance space (111) being provided at the first connection hole (310); A sealing ring (400) is provided with a second connection hole (410) penetrating the pole piece (200); a relief groove (420) is recessed at the bottom of the sealing ring (400); and the protrusion (320) is accommodated in the relief groove (420) and the relief space (111).

2. The cylindrical battery cover according to claim 1, characterized in that: The avoidance groove (420) is opened at the bottom end of the second connection hole (410), so that a step structure is formed at the bottom end of the second connection hole (410).

3. The cylindrical battery cover according to claim 2, characterized in that: The inner diameter of the groove side wall (421) of the avoidance groove (420) is the same as the inner diameter of the pole mounting hole (110).

4. The cylindrical battery cover according to claim 1, characterized in that: The top of the pole piece (200) includes a crimping portion (220), and the sealing ring (400) is sandwiched between the crimping portion (220) and the top wall of the cover plate body (100).

5. The cylindrical battery cover according to claim 4, characterized in that: The upper and lower ends of the sealing ring (400) are respectively interference-connected with the top wall of the cover plate body (100) and the bottom wall of the crimping portion (220).

6. The cylindrical battery cover according to claim 4, characterized in that: The outer diameter of the crimping portion (220) is greater than the outer diameter of the sealing ring (400).

7. The cylindrical battery cover according to claim 6, characterized in that: The cylindrical battery cover plate further includes an annular connector (500), the top wall of which is provided with a limiting groove (510) for cooperating with and installing the crimping portion (220), and the inner diameter of the annular connector (500) is greater than the outer diameter of the sealing ring (400).

8. A single cell battery, characterized in that: The invention comprises a cylindrical battery cover plate as claimed in any one of claims 1 to 7.

9. The single cell according to claim 8, characterized in that: The single battery further comprises a battery housing (120), and the cover plate body (100) and the battery housing (120) are integrally formed.

10. Electrical equipment, characterized in that: The invention comprises a plurality of single cells as claimed in claim 8 or 9.

Images