Cover plate structure and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises a cover plate body, a pole, upper plastic cement and a sealing ring, the pole is arranged on the cover plate body, the pole comprises a combination part and a connection part which are coaxially arranged, two ends of the connection part are respectively connected with the cover plate body and the combination part, and the upper plastic cement is arranged on the cover plate body. The outer wall of the combination part is provided with bulges and recesses which are arranged at intervals; a combination groove corresponding to the outer wall of the combination part in shape is formed in the upper plastic, so that the upper plastic is connected with the combination part; the sealing ring is sleeved on the pole, and the inner wall of the sealing ring is connected with the outer wall of the connecting part. Thus, the protrusions and the recesses which are arranged at intervals can enable the combination parts of the upper plastic and the pole to be tightly connected, the contact area of the upper plastic and the pole is increased, loosening of the upper plastic is avoided, and the connection strength of the upper plastic and the pole is improved; and the friction force between the pole and the sealing ring can be increased, and the connection strength between the upper plastic and the pole is improved.

Description

Technical Field

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

[0002] A battery is a device that converts chemical energy into electrical energy and is widely used in daily life and industrial production.

[0003] The battery includes a cover plate, a shell and a battery cell. The battery cell is arranged in the shell. The cover plate and the shell are fixedly connected. The cover plate is fixedly connected to the pole. A sealing ring is provided on the pole. The cover plate is provided with a lower plastic for insulating the cover plate and the battery cell and an upper plastic for insulating the pole and the cover plate. During assembly, the sealing ring is first installed on the pole, and then the pole is connected to the cover plate, and the upper plastic is connected to the pole by injection molding.

[0004] However, in order to connect the pole to the upper plastic, a boss and a groove are usually opened on the pole to enable the upper plastic to be clamped to the pole. When the staff takes the pole equipped with the sealing ring, the sealing ring may be lifted up and stuck in the groove, causing the sealing performance of the upper plastic to be assembled to the pole to deteriorate. In addition, the upper plastic and the pole are connected through the boss and the groove, and the torsion and thrust resistance of the connection are poor, which may cause the connection between the upper plastic and the pole to loosen, affecting the battery performance. Utility Model Content

[0005] The purpose of the utility model is to provide a cover plate structure and a battery to solve the problems of poor connection effect and poor sealing performance between the upper plastic and the pole.

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

[0007] In a first aspect, a cover plate structure comprises: a cover plate body; a pole, the pole being arranged on the cover plate body, the pole comprising a coaxially arranged coupling portion and a connecting portion, the two ends of the connecting portion being respectively connected to the cover plate body and the coupling portion, the outer wall of the coupling portion being provided with spaced protrusions and depressions; an upper plastic, the upper plastic being provided with a coupling groove corresponding to the shape of the outer wall of the coupling portion so as to connect the upper plastic to the coupling portion; a sealing ring, the sealing ring being sleeved on the pole, the inner wall of the sealing ring being connected to the outer wall of the connecting portion.

[0008] Preferably, the maximum diameter of the joining portion is equal to the maximum diameter of the connecting portion.

[0009] Preferably, a connecting groove is provided on the outer wall of the coupling portion, and the connecting groove is arranged at an angle to the recess.

[0010] Preferably, a plurality of the connecting grooves are provided, and the plurality of connecting grooves are circumferentially arranged on the outer wall of the coupling portion along the axis of the pole.

[0011] Preferably, a plurality of protrusions are provided, and the plurality of protrusions are circumferentially arranged on the outer wall of the coupling portion, and the plurality of protrusions are spaced apart along the axis of the pole, and the recesses are formed between adjacent protrusions.

[0012] Preferably, the outer wall of the joint portion is a knurled structure.

[0013] Preferably, a clamping block is provided on the outer wall of the sealing ring, and a clamping groove is provided on the outer wall of the connecting portion corresponding to the clamping block.

[0014] Preferably, a limiting block is provided on the cover body, and a limiting groove is provided on the upper plastic corresponding to the position of the limiting block, so as to enable the cover body to be clamped with the upper plastic.

[0015] Preferably, at least two limit blocks are provided, and the limit blocks are centrally symmetrically arranged along the axis of the pole.

[0016] In the second aspect, a battery comprises a shell, a battery cell and the cover structure as described above, wherein the shell is fixedly connected to the cover body, the battery cell is arranged in a space enclosed by the shell and the cover body, and the coupling portion and the connecting portion of the pole are both arranged on a side of the cover body away from the battery cell.

[0017] Beneficial effects of the utility model:

[0018] A cover structure includes a cover body, a pole, an upper plastic and a sealing ring. The pole is arranged on the cover body, and the pole includes a coaxially arranged joint and a connecting part. The two ends of the connecting part are respectively connected to the cover body and the joint part, and the outer wall of the joint part is provided with protrusions and depressions arranged at intervals; a joint groove corresponding to the shape of the outer wall of the joint part is opened inside the upper plastic to connect the upper plastic to the joint part; the sealing ring is sleeved on the pole, and the inner wall of the sealing ring is connected to the outer wall of the connecting part.

[0019] In this way, compared with the pole with grooves and bosses, the protrusions and depressions arranged at intervals can make the joint between the upper plastic and the pole tightly connected. When the upper plastic has a circumferential movement trend, the protrusions and depressions can increase the contact area between the upper plastic and the pole, prevent the upper plastic from loosening, and improve the connection strength between the upper plastic and the pole; when the staff takes the pole equipped with a sealing ring, due to the large friction between the sealing ring and the pole, and the protrusion can block the sealing ring, the sealing ring is not easy to warp or even deflect, thereby improving the connection strength between the upper plastic and the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the cover plate structure in one embodiment of the present utility model;

[0021] Figure 2 This is a partial structural diagram of the cover plate structure in one embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pole in one embodiment of the utility model. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the structure of the pole in one embodiment of the utility model. Figure 2 ;

[0024] Figure 5 In one embodiment of the present invention Figure 4 A magnified view of point A;

[0025] Figure 6 This is a schematic diagram of the structure of the pole in one embodiment of the utility model. Figure 3 .

[0026] In the picture:

[0027] 1. Cover plate body; 11. Limit block; 2. Pole; 21. Joint; 211. Protrusion; 212. Recess; 213. Connection groove; 22. Connection; 221. Snap-fit groove; 23. Base; 3. Upper plastic; 31. Joint groove; 4. Sealing ring; 41. Snap-fit block; 5. Lower plastic. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Example 1

[0033] See Figures 1 to 4 The utility model provides a cover structure, including a cover body 1, a pole 2, an upper plastic 3 and a sealing ring 4. The pole 2 is arranged on the cover body 1, and the pole 2 includes a coaxially arranged coupling portion 21 and a connecting portion 22. The two ends of the connecting portion 22 are respectively connected to the cover body 1 and the coupling portion 21. The outer wall of the coupling portion 21 is provided with spaced protrusions 211 and recesses 212; a coupling groove 31 corresponding to the shape of the outer wall of the coupling portion 21 is opened inside the upper plastic 3 to connect the upper plastic 3 to the coupling portion 21; the sealing ring 4 is sleeved on the pole 2, and the inner wall of the sealing ring 4 is connected to the outer wall of the connecting portion 22.

[0034] In this embodiment, the pole 2 is vertically arranged on the cover body 1, and the pole 2 also includes a base 23. The coupling portion 21, the connecting portion 22 and the base 23 are integrally formed, and the base 23 is fixedly connected to the cover body 1. The upper plastic 3 is fixedly connected to the pole 2 through an injection molding process; the outer wall of the connecting portion 22 is smoothly arranged to facilitate abutment with the inner wall of the sealing ring 4.

[0035] In this way, compared with the pole 2 with grooves and bosses, the protrusions 211 and recesses 212 arranged at intervals can make the upper plastic 3 and the joint 21 of the pole 2 tightly connected. When the upper plastic 3 has a circumferential movement trend, the protrusions 211 and recesses 212 can increase the contact area between the upper plastic 3 and the pole 2, prevent the upper plastic 3 from loosening, and improve the connection strength between the upper plastic 3 and the pole 2; when the staff takes the pole 2 equipped with the sealing ring 4, due to the large friction between the sealing ring 4 and the pole 2, and the protrusions 211 can block the sealing ring 4, the sealing ring 4 is not easy to tilt or even deflect, thereby improving the connection strength between the upper plastic 3 and the pole 2.

[0036] See Figure 3 In some embodiments, a plurality of protrusions 211 are provided. The plurality of protrusions 211 are circumferentially arranged on the outer wall of the coupling portion 21. The plurality of protrusions 211 are spaced apart along the axis of the pole 2, and recesses 212 are formed between adjacent protrusions 211. The protrusions 211 are annular in structure, and the plurality of protrusions 211 are equally spaced apart. The protrusions 211 and the recesses 212 are integrally formed on the pole 2, and the width of the recess 212 is less than the thickness of the sealing ring 4.

[0037] In this way, the connection strength between the upper plastic 3 and the pole 2 in the height direction of the pole 2 can be improved, and the torsion resistance and thrust resistance of the connection between the upper plastic 3 and the pole 2 can be improved, so as to prevent the upper plastic 3 from being deformed or even falling off from the pole 2 due to external force, thereby improving the connection effect of the pole 2; at the same time, the protrusion 211 can increase the friction between the sealing ring 4 and the joint 21, thereby preventing the sealing ring 4 from warping; the width of the recess 212 is smaller than the thickness of the sealing ring 4, so that the sealing ring 4 is not easily stuck in the recess 212, thereby improving the sealing performance between the upper plastic 3 and the pole 2.

[0038] It is understandable that the shape of the protrusion 211 is not limited to a circular structure, and can also be wavy or broken line along the circumference. The shape of the protrusion 211 can be flexibly adjusted to improve the connection effect between the upper plastic 3 and the pole 2. No more examples are given here.

[0039] See Figure 3 In some embodiments, the maximum diameter of the coupling portion 21 is equal to the maximum diameter of the connecting portion 22 , that is, the maximum diameter of the protrusion 211 is equal to the diameter of the connecting portion 22 .

[0040] In this way, it is convenient for the staff to assemble the sealing ring 4 to the connecting part 22, and the sealing ring 4 is not easy to warp up and get stuck inside the recess 212, thereby improving the connection stability between the sealing ring 4 and the connecting part 22 and avoiding the deterioration of the sealing effect due to the warping of the sealing ring 4.

[0041] It is understandable that the maximum diameter of the coupling portion 21 may also be greater than the maximum diameter of the connecting portion 22 so that the sealing ring 4 is in close contact with the connecting portion 22 , which will not be elaborated here.

[0042] See Figure 3 In some embodiments, a connecting groove 213 is formed on the outer wall of the coupling portion 21 , and the connecting groove 213 is arranged at an angle to the recess 212 .

[0043] In this embodiment, the length direction of the connecting groove 213 is parallel to the height direction of the pole 2 , and the connecting groove 213 is connected to the recess 212 and is vertically arranged.

[0044] In this way, when the upper plastic 3 is connected to the pole 2 by injection molding, the upper plastic 3 is engaged with the connecting groove 213, which can further improve the connection effect between the upper plastic 3 and the joint 21, improve its torsion resistance and thrust resistance, fix the relative position of the upper plastic 3 and the joint 21, prevent the upper plastic 3 from being affected by external forces and being deflected or even falling off, and improve the sealing performance between the upper plastic 3 and the pole 2.

[0045] It is understandable that the connection groove 213 may also be arranged at an acute angle to the recess 212 and is not limited to being arranged vertically, and this embodiment does not limit this.

[0046] See Figure 3 In some embodiments, a plurality of connection grooves 213 are provided, and the plurality of connection grooves 213 are circumferentially provided on the outer wall of the coupling portion 21 along the axis of the pole 2. In this embodiment, four connection grooves 213 are provided, and the four connection grooves 213 are arranged at equal intervals.

[0047] In this way, by providing a plurality of connection grooves 213 arranged at equal intervals, the upper plastic 3 can be tightly connected to the joint 21, thereby improving the sealing performance between the upper plastic 3 and the pole 2, and making the structural strength of the connection between the upper plastic 3 and the joint 21 more stable, making it less likely for the upper plastic 3 to rotate and fall off, improving the connection effect between the upper plastic 3 and the pole 2, and improving the torsion and thrust resistance of the upper plastic 3.

[0048] It is understandable that the number of the connection slots 213 can be flexibly adjusted according to actual needs, and will not be listed in detail here.

[0049] See Figure 4 and Figure 5 In some embodiments, a snap-in block 41 is provided on the outer wall of the sealing ring 4, and a snap-in groove 221 is provided on the outer wall of the connecting portion 22 corresponding to the snap-in block 41. In this embodiment, four snap-in blocks 41 are provided, and the snap-in groove 221 is provided corresponding to the end of the connecting groove 213 facing the base 23.

[0050] In this way, the sealing ring 4 can be clamped with the connecting portion 22 through the clamping block 41, so as to further improve the connection strength between the sealing ring 4 and the connecting portion 22, prevent the sealing ring 4 from warping or falling off from the connecting portion 22, and improve the sealing effect between the upper plastic 3 and the pole 2; the clamping groove 221 is corresponding to the connecting groove 213, which makes it easier for the staff to clamp the clamping block 41 into the clamping groove 221, thereby improving assembly efficiency.

[0051] It is understandable that the clamping slots 221 and the connecting slots 213 may also be arranged alternately, and the arrangement positions of the clamping slots 221 and the connecting slots 213 may be flexibly adjusted, which will not be elaborated here.

[0052] See Figure 2 In some embodiments, a limit block 11 is provided on the cover body 1, and a limit groove (not shown) is provided in the upper plastic 3 at a position corresponding to the limit block 11, for securing the cover body 1 and the upper plastic 3. Furthermore, at least two limit blocks 11 are provided, and the limit blocks 11 are arranged symmetrically along the axis of the pole 2.

[0053] In this embodiment, the limiting block 11 is fixedly connected to the cover body 1 , and two limiting blocks 11 are provided.

[0054] In this way, the limit block 11 can limit the rotation of the upper plastic 3 around the axis, improve the torsion and thrust resistance of the upper plastic 3, avoid displacement or falling off between the upper plastic 3 and the pole 2, and improve the connection strength between the upper plastic 3 and the pole 2. When the upper plastic 3 is assembled to the cover body 1 through the injection molding process, a limit groove compatible with the limit block 11 can be formed, thereby achieving the connection strength between the upper plastic 3 and the cover body 1 and reducing the difficulty of assembly.

[0055] It is understandable that one limit block 11 may be provided, and the number and setting positions of the limit blocks 11 may be flexibly adjusted, which is not limited in this embodiment.

[0056] See Figures 1 to 3 The present invention also provides a battery, including a shell (not shown in the figure), a battery cell (not shown in the figure) and a cover structure. The shell is fixedly connected to the cover body 1. The battery cell is arranged in the space enclosed by the shell and the cover body 1. The joint portion 21 and the connection portion 22 of the pole 2 are both arranged on the side of the cover body 1 away from the battery cell. In this embodiment, the cover structure also includes a lower plastic 5, which is connected to the side of the cover body 1 away from the upper plastic 3 (that is, the side facing the battery cell). Two poles 2 are provided, and the two poles 2 are respectively arranged at both ends of the cover body 1. The poles 2 pass through the cover body 1. The sealing ring 4 is arranged on the side of the cover body 1 away from the upper plastic 3 and abuts against the cover body 1 to achieve the limitation of the sealing ring 4.

[0057] Example 2

[0058] See Figure 6 The difference from the first embodiment is that the outer wall of the joint 21 is a knurled structure, and the width of the recess 212 formed by the knurling is smaller than the thickness of the sealing ring 4 to prevent the sealing ring 4 from rising or getting stuck in the recess 212.

[0059] In this way, by providing the knurling, not only can the connection strength between the upper plastic 3 and the joint 21 be enhanced, the torsion resistance and thrust resistance of the upper plastic 3 be improved, and the upper plastic 3 be prevented from falling off the pole 2, but the position of the sealing ring 4 can also be restricted, and the sealing ring 4 can be prevented from shifting during the process of taking the pole 2, thereby improving the sealing performance between the upper plastic 3 and the pole 2.

[0060] 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. A cover plate structure, characterized in that: include: Cover plate body (1); A pole (2), the pole (2) being arranged on the cover plate body (1), the pole (2) comprising a coaxially arranged coupling portion (21) and a connecting portion (22), the two ends of the connecting portion (22) being respectively connected to the cover plate body (1) and the coupling portion (21), and the outer wall of the coupling portion (21) being provided with protrusions (211) and recesses (212) arranged at intervals; An upper plastic (3), wherein a coupling groove (31) corresponding to the shape of the outer wall of the coupling portion (21) is provided inside the upper plastic (3), so as to connect the upper plastic (3) with the coupling portion (21); A sealing ring (4) is sleeved on the pole (2), and the inner wall of the sealing ring (4) is connected to the outer wall of the connecting portion (22).

2. The cover plate structure according to claim 1, characterized in that: The maximum diameter of the coupling portion (21) is equal to the maximum diameter of the connecting portion (22).

3. The cover plate structure according to claim 1, characterized in that: A connecting groove (213) is provided on the outer wall of the coupling portion (21), and the connecting groove (213) is arranged at an angle to the recess (212).

4. The cover plate structure according to claim 3, characterized in that: A plurality of connection grooves (213) are provided, and the plurality of connection grooves (213) are circumferentially arranged on the outer wall of the coupling portion (21) along the axis of the pole (2).

5. The cover plate structure according to any one of claims 1 to 4, characterized in that: A plurality of protrusions (211) are provided, and the plurality of protrusions (211) are circumferentially arranged on the outer wall of the coupling portion (21), and the plurality of protrusions (211) are spaced apart along the axis of the pole (2), with the recesses (212) formed between adjacent protrusions (211).

6. The cover plate structure according to any one of claims 1 to 4, characterized in that: The outer wall of the coupling portion (21) is a knurled structure.

7. The cover plate structure according to any one of claims 1 to 4, characterized in that: The outer wall of the sealing ring (4) is provided with a clamping block (41), and the outer wall of the connecting portion (22) is provided with a clamping groove (221) corresponding to the clamping block (41).

8. The cover plate structure according to any one of claims 1 to 4, characterized in that: A limiting block (11) is provided on the cover body (1), and a limiting groove is provided on the upper plastic (3) corresponding to the position of the limiting block (11) for clamping the cover body (1) and the upper plastic (3).

9. The cover plate structure according to claim 8, characterized in that: At least two of the limit blocks (11) are provided, and the limit blocks (11) are centrally symmetrically arranged along the axis of the pole (2).

10. A battery, characterized in that: The invention comprises a shell, a battery cell and a cover plate structure according to any one of claims 1 to 9, wherein the shell is fixedly connected to the cover plate body (1), the battery cell is arranged in a space enclosed by the shell and the cover plate body (1), and the coupling portion (21) and the connecting portion (22) of the pole (2) are both arranged on a side of the cover plate body (1) facing away from the battery cell.

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