Battery cover plate and battery

Abstract

The utility model belongs to the technical field of power batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a cover plate body, a combined colloid and a connecting sheet, the cover plate body is provided with a tab through hole for a tab to pass through; the combined colloid comprises upper plastic, the upper plastic is arranged on the upper side of the cover plate body, and the upper plastic is provided with through holes corresponding to the through holes of the tabs; the battery comprises a shell and the battery cover plate, an opening is formed in the shell, the battery cover plate blocks the opening, and the lower side face of the cover plate body faces the interior of the shell. The connecting piece can be fixed on the upper plastic on the upper side of the cover plate body in a gluing manner, and the tab in the shell can extend out of the shell from the tab through hole of the cover plate body and the through hole of the upper plastic, so that the traditional manner that the connecting piece is arranged in the shell is replaced, and the space utilization rate can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery cover 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 often 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 housing, 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 cover plate, which can place a connecting piece on the outside of the cover plate 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 battery cover, comprising:

[0007] The cover plate body is provided with a tab through hole for the tab to pass through;

[0008] A combined colloid, the combined colloid comprising an upper plastic, the upper plastic being disposed on the upper side of the cover body, the upper plastic being provided with a perforation corresponding to the tab through-hole;

[0009] A connecting piece is adhered to the upper plastic by adhesive.

[0010] In some embodiments, the adhesive has a bonding strength of ≥0.5 MPa.

[0011] In some embodiments, the composite colloid further includes a lower plastic, the lower plastic is disposed on the lower side of the cover body, and the lower plastic is provided with the through hole corresponding to the tab through hole.

[0012] In some embodiments, the upper plastic and the lower plastic are integrally formed.

[0013] In some embodiments, a mounting groove is provided on the upper side of the cover body, and the upper plastic and the tab through-hole are located at the bottom of the mounting groove.

[0014] In some embodiments, the upper plastic is provided with a receiving groove, the connecting piece is bonded into the receiving groove, and the bottom surface of the receiving groove is not higher than the upper side surface of the cover body.

[0015] In some embodiments, the upper plastic is provided with a ring edge, and the ring edge and the lower plastic clamp the cover body.

[0016] In some embodiments, an explosion-proof valve is provided on the cover body.

[0017] In some embodiments, the cover body is provided with a liquid injection port.

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

[0019] Beneficial effects of the utility model:

[0020] The connecting piece can be fixed to the upper plastic on the upper side of the cover body by gluing. Therefore, when the upper surface of the cover body is placed on the outside of the 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 in the upper plastic, so that they can be connected to the connecting piece placed on the upper plastic, replacing the traditional method of setting the connecting piece inside the shell, thereby improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the battery cover of the utility model;

[0022] Figure 2 yes Figure 1 Exploded diagram;

[0023] Figure 3 It is an exploded view of the combined colloid in the utility model;

[0024] Figure 4 This is a top view of the battery cover of the utility model;

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

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

[0027] In the picture:

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

[0029] 2. Assembled colloid; 21. Upper plastic; 211. Receiving groove; 212. Ring edge; 22. Lower plastic; 23. Perforation;

[0030] 3. Connecting piece;

[0031] 4. Explosion-proof valve. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figures 1 to 6 As shown, the utility model provides a battery cover, which includes a cover body 1, a composite colloid 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 composite colloid 2 includes an upper plastic 21, which is arranged on the upper side of the cover body 1 and is provided with a through-hole 23 corresponding to the tab through-hole 11; the connecting piece 3 is adhered to the upper plastic 21 by adhesive.

[0037] The connecting piece 3 can be fixed to the upper plastic 21 on the upper side of the cover body 1 by gluing. 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 upper plastic 21, so that they can be connected to the connecting piece 3 placed on the upper plastic 21, replacing the traditional method of setting the connecting piece 3 inside the shell, thereby improving space utilization.

[0038] In some embodiments, to ensure the securement of the connecting piece 3, the adhesive strength is ≥ 0.5 MPa. This prevents the connecting piece 3 from unexpectedly falling off due to external forces when bonded to the upper plastic 21. Furthermore, due to the overall operating environment, the adhesive also needs to be resistant to electrolytes. Based on these bonding strength and electrolyte resistance properties, the adhesive is illustratively made of polyolefin resin and polyisobutylene rubber.

[0039] like Figure 2 and Figure 5 As shown, 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 upper plastic 21 is also provided at the bottom of the mounting grooves 12, so that the through-holes 23 on the upper plastic 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.

[0040] 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 N of tab through-holes 11 is greater than or equal to 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 N of tab through-holes 11 located at the positive electrode is greater than or equal to 1, and the number N of tab through-holes 11 located at the negative electrode is greater than or equal to 1.

[0041] like Figure 3 and Figure 6 As shown, in some embodiments, the upper plastic 21 is provided with a receiving groove 211, and the connecting piece 3 is glued into the receiving groove 211, and the bottom surface of the receiving groove 211 is not higher than the upper side surface of the cover body 1; specifically, the distance between the bottom of the receiving 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 receiving 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.

[0042] like Figure 2 、 Figure 3 and Figure 5 As shown, the composite colloid 2 is also provided with a lower plastic 22, which is also a plate-shaped structure and is located on the lower side of the cover body 1. The lower plastic 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 composite colloid 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 upper plastic 21, and the lower end of the connecting plastic is connected to the lower plastic 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 upper plastic 21 or the lower plastic 22, and then connected to the other. Of course, in another embodiment, the connecting plastic, the upper plastic 21 and the lower plastic 22 are integrally formed by injection molding.

[0043] like Figure 3 and Figure 6 As shown, in some embodiments, the upper plastic 21 is further provided with a ring edge 212. When the upper plastic 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 lower plastic 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; and 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.

[0044] In some embodiments, an explosion-proof valve 4 and an injection hole 13 can also be provided on the cover body 1. The explosion-proof valve 4 and the injection hole 13 are both existing technologies, and their structures will not be described in detail. It should be noted that when the explosion-proof valve 4 and the injection hole 13 are provided, an explosion-proof valve placement groove is provided on the cover body 1, and the lower plastic 22 is provided with through holes corresponding to the explosion-proof valve 4 and the injection hole 13.

[0045] The present invention also provides a battery, which includes a shell and the above-mentioned battery cover. The shell has an opening, and the battery cover is sealed at the opening to form an accommodating space so that a battery cell can be placed in the accommodating space. When the battery cover is sealed at the opening, the lower side of the cover body 1 faces the inside of the shell, so that the lower plastic 22 can be located inside the shell, and the upper plastic 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.

[0046] 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. Battery cover, characterized in that: include: A cover plate body (1), wherein the cover plate body (1) is provided with a tab through-hole (11) for the tab to pass through; A combined colloid (2), the combined colloid (2) comprising an upper plastic (21), the upper plastic (21) being arranged on the upper side of the cover plate body (1), the upper plastic (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 adhered to the upper plastic (21) by adhesive.

2. The battery cover according to claim 1, characterized in that: The adhesive strength of the viscose is ≥0.5 MPa.

3. The battery cover according to claim 1, characterized in that: The combined colloid (2) further comprises a lower plastic (22), the lower plastic (22) being arranged on the lower side of the cover plate body (1), and the lower plastic (22) being provided with the through hole (23) corresponding to the tab through hole (11).

4. The battery cover according to claim 3, characterized in that: The upper plastic (21) and the lower plastic (22) are integrally formed.

5. The battery cover according to claim 1, characterized in that: A mounting groove (12) is provided on the upper side of the cover body (1), and the upper plastic (21) and the tab through hole (11) are located at the bottom of the mounting groove (12).

6. The battery cover according to claim 5, characterized in that: The upper plastic (21) is provided with a receiving groove (211), the connecting piece (3) is bonded into the receiving groove (211), and the bottom surface of the receiving groove (211) is not higher than the upper side surface of the cover body (1).

7. The battery cover according to claim 3, characterized in that: The upper plastic (21) is provided with a ring edge (212), and the ring edge (212) and the lower plastic (22) clamp the cover body (1).

8. The battery cover according to claim 1, characterized in that: An explosion-proof valve (4) is provided on the cover plate body (1).

9. The battery cover according to claim 1, characterized in that: The cover plate body (1) is provided with a liquid injection port (13).

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

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