Cover plate structure and battery

Abstract

The utility model belongs to the technical field of power batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises a cover plate body, a plastic part and a connecting piece, and the cover plate body is provided with a tab through hole; the plastic part comprises a first plastic part, the first plastic part is arranged on the upper side of the cover plate body, and a through hole corresponding to the tab through hole is formed in the first plastic part; the battery comprises a shell and the cover plate structure, an opening is formed in the shell, the cover plate structure blocks the opening to form a containing space so that a battery cell can be placed in the containing space, and when the cover plate structure blocks the opening, the lower side face of the cover plate body faces the interior of the shell so that the battery cell can be placed in the shell. In this way, the second plastic part can be located in the shell, the first plastic part and the connecting piece can be located on the outer side of the shell, then the pole can be arranged on the outer side of the shell, the utilization space in the shell can be increased, and the space utilization rate is increased.

Description

Technical Field

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

[0002] The cover in the prior art often includes a cover body and a connecting piece. The connecting piece is located on the lower side of the cover body to connect the tab and the pole through the connecting piece. The connecting piece is located inside the battery shell, which is not conducive to the utilization of the internal space of the battery. Utility Model Content

[0003] One of the purposes of the present utility model is to provide a battery structure capable of placing a connecting piece on the outside of the cover body;

[0004] A second purpose of the present invention is to provide a battery that can improve space utilization.

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

[0006] A cover plate structure comprising:

[0007] A cover plate body, wherein the cover plate body is provided with a tab through hole;

[0008] A plastic part, the plastic part comprising a first plastic part, the first plastic part being disposed on the upper side of the cover plate body, the first plastic part being provided with a through hole corresponding to the tab through hole;

[0009] A connecting piece is fixed to the first plastic part by hot melting or hot riveting.

[0010] In some embodiments, a fixing hole is provided on the connecting piece, and a fixing column corresponding to the fixing hole is provided on the first plastic part, and the fixing column can be melted by heat.

[0011] In some embodiments, the fixing hole is a stepped hole.

[0012] In some embodiments, a plurality of fixing holes are provided.

[0013] In some embodiments, the first plastic part is provided with a receiving groove, and the fixing column is provided at the bottom of the receiving groove.

[0014] In some embodiments, the bottom surface of the accommodating groove is not higher than the upper side surface of the cover body.

[0015] In some embodiments, the plastic part further includes a second plastic part, the second plastic part is disposed on the lower side of the cover body, and the second plastic part is provided with the through hole corresponding to the tab through hole.

[0016] In some embodiments, the first plastic part and the second plastic part are integrally formed.

[0017] In some embodiments, the first plastic part is provided with a ring edge, and the ring edge and the second plastic part clamp the cover body.

[0018] A battery is also provided, which includes a shell having an opening and a cover structure as described above. The cover body is sealed in the opening to form a storage space for the battery cell, and the lower side of the cover body faces the shell.

[0019] Beneficial effects of the utility model:

[0020] The connecting piece can be fixed to the first plastic part on the upper side of the cover body by hot melting or hot riveting. Therefore, when the upper surface of the cover body is placed on the outside of the battery shell, the tabs in the shell can extend to the outside of the shell through the tab through-holes of the cover body and the through-holes of the first plastic part, so that they can be connected to the connecting piece placed on the first plastic part, instead of the traditional method of setting the connecting piece inside the shell, thereby improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the cover structure in an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 Exploded diagram;

[0023] Figure 3 This is an exploded view of a plastic part in an embodiment of the present utility model;

[0024] Figure 4 This is a top view of the cover plate structure in the embodiment of the present utility model;

[0025] Figure 5 yes Figure 4 Middle AA section;

[0026] Figure 6 yes Figure 4 Middle BB cross-section.

[0027] In the picture:

[0028] 1. Cover plate body; 11. Tab through hole; 12. Mounting slot; 13. Liquid filling port;

[0029] 2. Plastic part; 21. First plastic part; 211. Accommodation groove; 212. Ring edge; 22. Second plastic part; 23. Perforation;

[0030] 3. Connecting piece; 31. Fixing hole;

[0031] 4. Fixed column;

[0032] 5. Explosion-proof valve. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," "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, 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.

[0037] like Figures 1 to 6 As shown, the utility model provides a cover structure, which includes a cover body 1, a plastic part 2 and a connecting piece 3. The cover body 1 is provided with a tab through hole 11 for the tab to pass through; the plastic part 2 includes a first plastic part 21, which is arranged on the upper side of the cover body 1, and the first plastic part 21 is provided with a through hole 23 corresponding to the tab through hole 11; the connecting piece 3 is fixed to the first plastic part 21 by hot melt or hot riveting.

[0038] The connecting piece 3 can be fixed to the first plastic part 21 on the upper side of the cover body 1 by hot melting or hot riveting. Therefore, when the upper surface of the cover body 1 is placed on the outside of the battery shell, the tabs in the shell can extend to the outside of the shell through the tab through-holes 11 of the cover body 1 and the through-holes 23 of the first plastic part 21, so that they can be connected to the connecting piece 3 placed on the first plastic part 21, instead of the traditional way of setting the connecting piece 3 in the shell, thereby improving space utilization.

[0039] like Figure 2 As shown, in order to achieve the above-mentioned fixing method, in some embodiments, a fixing hole 31 is provided on the connecting piece 3, and a fixing column 4 corresponding to the fixing hole 31 is provided on the first plastic part 21. The fixing column 4 can be melted by heat, and then during installation, the connecting piece 3 is fixed to the fixing column 4 through the fixing hole 31, and then the fixing column 4 is hot-melted or hot-riveted to fix the connecting piece 3. Furthermore, the fixing hole 31 is a stepped hole, so that the fixing of the connecting piece 3 is more stable. Furthermore, the number of fixing columns 4 can be set to multiple, which can also improve the stability of the connecting piece 3. For example, the fixing column 4 is integrally formed with the first plastic part 21.

[0040] In some embodiments, the cover body 1 is plate-shaped and is provided with a plurality of mounting grooves 12, the tab through-holes 11 are provided at the bottom of the mounting grooves 12, and the first plastic part 21 is also provided at the bottom of the mounting grooves 12, so that the through-holes 23 on the first plastic part 21 are opposite to the tab through-holes 11, and the tabs can pass through the tab through-holes 11 and the through-holes 23 and be folded over the cover body 1.

[0041] It should be noted that the number of mounting slots 12 can vary depending on the number of positive and negative electrodes, and is not specifically limited here. The number N of tab through-holes 11 can also vary depending on the number of positive and negative electrodes, and can be set differently according to different scenarios. For example, when only a positive electrode or a negative electrode is provided on the cover body 1, the number of tab through-holes 11 N ≥ 1; when a positive electrode is provided at one end of the cover body 1 and a negative electrode is provided at the other end, the number of tab through-holes 11 located at the positive electrode N ≥ 1, and the number of tab through-holes 11 located at the negative electrode N ≥ 1.

[0042] like Figure 3 As shown, in some embodiments, the first plastic part 21 is provided with a receiving groove 211 , and the fixing column 4 is provided at the bottom of the receiving groove 211 so as to be able to fix the connecting piece 3 in the receiving groove 211 .

[0043] like Figures 4 to 6As shown, in some embodiments, the bottom surface of the accommodating groove 211 is not higher than the upper side surface of the cover body 1; specifically, the distance between the bottom of the accommodating groove 211 and the upper side surface of the cover body 1 is a, a=0-0.5Hmm, where H is the thickness of the cover body 1; a should not be too large. If a exceeds the above value, the groove depth of the installation groove 12 will increase, which will cause the strength of the cover body 1 to decrease; and when a is less than the above value, that is, a is a negative number, the groove bottom surface of the accommodating groove 211 will be higher than the upper side surface of the cover body 1, so that the groove depth of the installation groove 12 will be reduced, which is not conducive to improving the utilization rate of the space.

[0044] The plastic part 2 is also provided with a second plastic part 22. The second plastic part 22 is also a plate-shaped structure, which is located on the lower side of the cover body 1. The second plastic part 22 is also provided with a perforation 23 for the tab to pass through. Since the tab passes through the tab through-hole 11 of the cover body 1, in order to facilitate insulation, the plastic part 2 is also provided with a connecting plastic. The connecting plastic is annular and surrounds the inner side of the tab through-hole 11. The upper end of the connecting plastic is connected to the first plastic part 21, and the lower end of the connecting plastic is connected to the second plastic part 22. When the tab passes through the tab through-hole 11, the tab is isolated from the cover body 1 to prevent contact between the two. It is understandable that the connecting plastic can be integrally formed with one of the first plastic part 21 or the second plastic part 22, and then connected to the other. Of course, in another embodiment, the connecting plastic, the first plastic part 21 and the second plastic part 22 are integrally formed by injection molding.

[0045] like Figure 6 As shown, in some embodiments, the first plastic part 21 is further provided with a ring edge 212. When the first plastic part 21 is provided on the upper side of the cover body 1, the ring edge 212 is fixed to the upper side surface of the cover body 1, and the cover body 1 is clamped by the ring edge 212 and the second plastic part 22; the width of the ring edge 212 is b, b = 1mm-10mm, and if the ring edge 212 is too small, it will easily lead to difficulty in fixing; if the ring edge 212 is too large, it will lead to an increase in the overall weight, and will also increase the material cost.

[0046] like Figure 2 As shown, in some embodiments, an explosion-proof valve 5 and a liquid injection port 13 can also be provided on the cover body 1. The explosion-proof valve 5 and the liquid injection port 13 are both existing technologies, and their structures are no longer described in detail. It should be noted that when the explosion-proof valve 5 and the liquid injection port 13 are provided, an explosion-proof valve placement groove is provided on the cover body 1, and the second plastic part 22 is provided with through holes corresponding to the explosion-proof valve 5 and the liquid injection port 13.

[0047] The present invention also provides a battery, which includes a shell and the above-mentioned cover structure. The shell has an opening, and the cover structure is sealed at the opening to form an accommodating space so that a battery cell can be placed in the accommodating space. When the cover structure is sealed at the opening, the lower side of the cover body 1 faces the inside of the shell, so that the second plastic part 22 can be located inside the shell, and the first plastic part 21 and the connecting piece 3 can be located outside the shell, so that the pole can also be arranged outside the shell, so as to increase the usable space inside the shell and improve space utilization.

[0048] 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 structure, characterized in that: include: A cover plate body (1), wherein the cover plate body (1) is provided with a tab through hole (11); A plastic part (2), the plastic part (2) comprising a first plastic part (21), the first plastic part (21) being arranged on the upper side of the cover plate body (1), the first plastic part (21) being provided with a through hole (23) corresponding to the tab through hole (11); A connecting piece (3), wherein the connecting piece (3) is fixed to the first plastic part (21) by hot melting or hot riveting.

2. The cover plate structure according to claim 1, characterized in that: The connecting piece (3) is provided with a fixing hole (31), and the first plastic part (21) is provided with a fixing column (4) corresponding to the fixing hole (31), and the fixing column (4) can be melted by heat.

3. The cover plate structure according to claim 2, characterized in that: The fixing hole (31) is a stepped hole.

4. The cover plate structure according to claim 2, characterized in that: A plurality of fixing holes (31) are provided.

5. The cover plate structure according to claim 2, characterized in that: The first plastic part (21) is provided with a receiving groove (211), and the fixing column (4) is provided at the bottom of the receiving groove (211).

6. The cover plate structure according to claim 5, characterized in that: The bottom surface of the accommodating groove (211) is not higher than the upper side surface of the cover plate body (1).

7. The cover plate structure according to claim 1, characterized in that: The plastic part (2) further includes a second plastic part (22), the second plastic part (22) being arranged on the lower side of the cover plate body (1), and the second plastic part (22) being provided with the through hole (23) corresponding to the tab through hole (11).

8. The cover plate structure according to claim 7, characterized in that: The first plastic part (21) and the second plastic part (22) are integrally formed.

9. The cover plate structure according to claim 7, characterized in that: The first plastic part (21) is provided with a ring edge (212), and the ring edge (212) and the second plastic part (22) clamp the cover plate body (1).

10. A battery comprising a housing having an opening, wherein: It also includes the cover plate structure according to any one of claims 1 to 9, wherein the cover plate body (1) is sealed in the opening to form an accommodating space for accommodating the battery cell, and the lower side of the cover plate body (1) faces the inside of the shell.

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