Battery cover plate and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery monomer. The battery cover plate comprises a cover plate body, a rubber coating ring, a pole and a sealing ring, wherein the pole comprises a top plate and a column casing. The cover plate body is provided with a mounting hole. The rubber coating ring is tightly attached to the upper surface of the cover plate body. The top plate is located on the side, away from the cover plate body, of the encapsulation ring, one end of the column casing is connected with the top plate, the other end of the column casing sequentially penetrates through the encapsulation ring and the mounting hole, and a gap is reserved between the pole and the encapsulation ring. The sealing ring is arranged on the column casing in a sleeving mode, penetrates through the rubber coating ring and is clamped between the top plate and the cover plate body. The battery cover plate is simple in structure, and the effectiveness of air tightness detection is effectively improved. The battery monomer comprises a battery cell, a shell and the battery cover plate, the battery cell is arranged in the shell, and the cover plate body covers the opening of the shell. As the effectiveness of air tightness detection of the battery cover plate is relatively high, the use safety and the use reliability of the battery monomer are further improved.

Description

Technical Field

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

[0002] The cover of a power battery usually includes a cover body, upper plastic, lower plastic, a sealing ring and a pole, among which the upper plastic and the lower plastic are respectively arranged on two opposite surfaces of the cover body, the sealing ring is sleeved on the pole and penetrates the upper plastic, and the pole penetrates the upper plastic, the cover body and the lower plastic in sequence, and the pole compresses the sealing ring to contact the cover body.

[0003] The sealing ring is used to ensure the sealing performance between the battery cell and the cover plate. After the cover plate is assembled, it is usually tested for airtightness. However, because the upper plastic of the pole is compressed and fits tightly with the cover plate body, and the pole itself fits tightly with the upper plastic, when the sealing ring is missing, the upper plastic and the cover plate body, as well as the upper plastic and the pole, can still have a temporary sealing effect. This allows the cover plate without the sealing ring to pass the airtightness test and enter the next production process as a qualified product. However, due to the characteristics of the upper plastic material, the temporary sealing effect formed by the upper plastic will fail, resulting in a reduction in the safety and reliability of the power battery.

[0004] Therefore, there is an urgent need to provide a battery cover and a battery cell to solve the above problems. Utility Model Content

[0005] The first object of the present utility model is to provide a battery cover plate, which has a simple structure and can effectively improve the effectiveness of airtightness detection.

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

[0007] Battery cover, including:

[0008] A cover body, wherein the cover body is provided with a mounting hole;

[0009] A rubber-coated ring, the rubber-coated ring being tightly fitted on the upper surface of the cover body;

[0010] The pole comprises a top plate and a column barrel, wherein the top plate is located on the side of the rubber-coated ring away from the cover plate body, one end of the column barrel is connected to the top plate, and the other end is sequentially passed through the rubber-coated ring and the mounting hole, with a gap left between the pole and the rubber-coated ring;

[0011] A sealing ring is sleeved on the column, passes through the rubber-coated ring and is clamped between the top plate and the cover plate body.

[0012] As an optional technical solution for the battery cover, the gap includes a groove, which is arranged on a surface of the top plate close to the cover body, and the groove is located at an edge of the top plate.

[0013] As an optional technical solution for the battery cover, the groove extends circumferentially along the top plate and is arranged in a closed loop.

[0014] As an optional technical solution for the battery cover, there are multiple grooves, and the multiple grooves are arranged at intervals along the circumference of the top plate.

[0015] As an optional technical solution for the battery cover, the pole is connected to the cover body by riveting, so that the sealing ring and the rubber-coated ring are compressed and tightly sealed with the cover body.

[0016] As an optional technical solution for the battery cover, part of the rubber-coated ring is clamped between the top plate and the cover body, and another part of the rubber-coated ring is arranged around the outer periphery of the top plate.

[0017] As an optional technical solution for the battery cover, a gap is left between the rubber-encapsulated ring and the outer periphery of the top plate.

[0018] As an optional technical solution for the battery cover, the battery cover further includes an insulating plate, which covers the surface of the cover body on the side away from the rubber-encapsulated ring, and the column passes through the insulating plate.

[0019] As an optional technical solution for the battery cover, part of the insulating plate is sandwiched between the side wall of the column and the mounting hole.

[0020] The second object of the present invention is to provide a power battery with high safety and reliability in use.

[0021] To achieve this purpose, the present invention adopts the following technical solutions:

[0022] A battery cell comprises a battery core, a shell and the battery cover plate, wherein the battery core is arranged in the shell and the cover plate body is arranged to cover the opening of the shell.

[0023] Beneficial effects of the utility model:

[0024] The battery cover provided by the present invention includes a cover body, a rubber-coated ring, a pole and a sealing ring, and the pole includes a top plate and a column barrel. The sealing ring is sleeved on the column barrel, and the sealing ring passes through the rubber-coated ring and is clamped between the top plate and the cover body; the rubber-coated ring is fitted on the upper surface of the cover body, and the column barrel passes through the rubber-coated ring and the mounting hole, and the pole and the rubber-coated ring are not tightly fitted, and a gap is left between the pole and the rubber-coated ring. Therefore, the sealing of the battery cover is only provided by the sealing ring, and the rubber-coated ring and the pole cannot achieve a temporary sealing effect. When performing an airtightness test, if a battery cover is encountered that lacks a sealing ring, the gap between the rubber-coated ring and the top plate of the pole and the gap between the side wall of the column barrel and the wall of the mounting hole will form an airflow channel, so that the battery cover that lacks a sealing ring cannot pass the airtightness test, thereby effectively improving the effectiveness of the airtightness test and providing a strong guarantee for the safety and reliability of the power battery. Furthermore, a gap is provided between the rubber-coated ring and the pole, which does not affect the assembly between the pole and other components of the battery cover, thereby simplifying the structure of the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional view of a battery cover provided by an embodiment of the present utility model;

[0026] Figure 2 This is a schematic structural diagram of the battery cover provided by an embodiment of the present invention before the pole is riveted;

[0027] Figure 3 This is a schematic diagram of the structure of the battery cover provided by the embodiment of the utility model after the pole is riveted

[0028] Figure 4 This is a schematic structural diagram of the rubber-coated ring of the battery cover provided by an embodiment of the present utility model;

[0029] Figure 5 This is a schematic structural diagram of the insulating plate of the battery cover provided by an embodiment of the present utility model;

[0030] Figure 6 It is a structural schematic diagram of a battery cell provided by an embodiment of the present utility model.

[0031] In the picture:

[0032] 10. Housing;

[0033] 100, cover plate body; 200, rubber-coated ring; 210, protrusion; 300, pole; 310, top plate; 320, column; 301, groove; 400, sealing ring; 500, insulating plate; 510, annular boss. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The battery cover provided in this embodiment has a simple structure and effectively improves the effectiveness of airtightness testing.

[0039] Specific as Figures 1 to 3As shown, the battery cover includes a cover body 100, a rubber-coated ring 200, a pole 300 and a sealing ring 400. The pole 300 includes a top plate 310 and a column 320. The cover body 100 is provided with a mounting hole. The rubber-coated ring 200 is tightly fitted on the upper surface of the cover body 100. The top plate 310 is located on the side of the rubber-coated ring 200 facing away from the cover body 100. One end of the column 320 is connected to the top plate 310, and the other end is successively passed through the rubber-coated ring 200 and the mounting hole, leaving a gap between the pole 300 and the rubber-coated ring 200. The sealing ring 400 is sleeved on the column 320. The sealing ring 400 passes through the rubber-coated ring 200 and is clamped between the top plate 310 and the cover body 100.

[0040] Based on the above design, the sealing ring 400 is sleeved on the column 320, the sealing ring 400 passes through the rubber-coated ring 200 and is clamped between the top plate 310 and the cover body 100; the rubber-coated ring 200 is fitted on the upper surface of the cover body 100, the column 320 passes through the rubber-coated ring 200 and the mounting hole, and the pole 300 and the rubber-coated ring 200 are not tightly fitted, and a gap is left between the pole 300 and the rubber-coated ring 200. Therefore, the seal of the battery cover is only provided by the sealing ring 400, and the rubber-encapsulated ring 200 and the pole 300 cannot achieve a temporary sealing effect. When performing an airtightness test, if a battery cover is missing the sealing ring 400, the gap between the rubber-encapsulated ring 200 and the top plate 310 of the pole 300 and the gap between the side wall of the cylinder 320 and the wall of the mounting hole will form an airflow channel, making the battery cover with the missing sealing ring 400 unable to pass the airtightness test, thereby effectively improving the effectiveness of the airtightness test and providing a strong guarantee for the safety and reliability of the power battery. In addition, the gap between the rubber-encapsulated ring 200 and the pole 300 will not affect the assembly between the pole 300 and other components of the battery cover, making the structure of the battery cover simple.

[0041] In this embodiment, the pole 300 is connected to the cover body 100 by riveting, so that the sealing ring 400 and the rubber-encapsulated ring 200 are tightly fitted and sealed with the cover body 100, which is simple to connect and has high connection strength.

[0042] Optionally, the gap includes a groove 301, which is provided on the surface of the top plate 310 on one side close to the cover body 100, and is located at the edge of the top plate 310. The groove 301 is provided so that the lower surface of the top plate 310 and the upper surface of the rubber-encapsulated ring 200 are not tightly sealed, that is, air permeability is allowed between the top plate 310 and the rubber-encapsulated ring 200; the groove 301 is simple to provide and also facilitates the assembly of the pole 300 and the rubber-encapsulated ring 200.

[0043] In some embodiments, the groove 301 extends circumferentially along the top plate 310 and is arranged in a closed loop.

[0044] In some other embodiments, continue as Figure 2 As shown, there are multiple grooves 301, which are spaced apart along the circumference of the top plate 310. As long as the air permeability between the rubber ring 200 and the top plate 310 can be detected, the grooves 301 do not need to be continuously arranged along the circumference of the top plate 310, so as to maximize the sealing performance of the entire battery cover plate equipped with the sealing ring 400.

[0045] For example, the number of the grooves 301 may be two, three, four, five, etc. In this embodiment, the number of the grooves 301 is four.

[0046] like Figure 1 and Figure 4 As shown, in order to improve the insulation performance of the rubber ring 200 and protect the pole 300 , part of the rubber ring 200 is sandwiched between the top plate 310 and the cover body 100 , and the other part of the rubber ring 200 is arranged around the outer periphery of the top plate 310 .

[0047] It should be noted that there is a gap between the rubber-encapsulated ring 200 and the outer periphery of the top plate 310. Otherwise, even though the top plate 310 is provided with a groove 301, if part of the rubber-encapsulated ring 200 is tightly arranged around the outer periphery of the top plate 310, the battery cover will also form a temporary seal.

[0048] In this embodiment, a plurality of protrusions 210 are circumferentially spaced apart on the inner sidewall of the rubber-coated ring 200 opposite to the outer periphery of the top plate 310 . The protrusions 210 abut against the outer periphery of the top plate 310 , forming a gap between the rubber-coated ring 200 and the outer periphery of the top plate 310 .

[0049] It should be noted that the protrusions 210 and the grooves 301 are arranged alternately.

[0050] like Figure 1 and Figure 5 As shown, in order to increase the insulation of the entire battery cover, the battery cover further includes an insulating plate 500 . The insulating plate 500 covers the surface of the cover body 100 facing away from the rubber ring 200 , and the column 320 passes through the insulating plate 500 .

[0051] Furthermore, a portion of the insulating plate 500 is sandwiched between the side wall of the column 320 and the mounting hole to isolate the cover body 100 from the column 320 .

[0052] In this embodiment, an annular boss 510 is provided on the surface of one side of the insulating plate 500 close to the cover body 100. The annular boss 510 passes through the mounting hole and is clamped between the side wall of the column 320 and the mounting hole, and the annular boss 510 abuts against the side of the sealing ring 400 close to the cover body 100.

[0053] It should be noted that a gap should be left between the insulating plate 500 and the pole 300 and / or between the insulating plate 500 and the cover body 100 to avoid forming a temporary seal between the insulating plate 500 and the pole 300 and between the insulating plate 500 and the cover body 100.

[0054] In this embodiment, the rubber-coated ring 200 and the insulating plate 500 are both plastic parts, and the cover body 100 is a plain aluminum sheet. Of course, in other embodiments, the rubber-coated ring 200, the insulating plate 500, and the cover body 100 can also be made of other materials, which will not be repeated here.

[0055] This embodiment also provides a battery cell with high safety and reliability in use.

[0056] Specific as Figure 6 As shown, the battery cell includes a battery cell, a housing 10, and the aforementioned battery cover. The battery cell is disposed within the housing 10, and the cover body 100 is disposed over the opening of the housing 10. The battery cell employs the aforementioned battery cover, which increases the effectiveness of airtightness testing of the battery cover, thereby improving the safety and reliability of the battery cell.

[0057] In this embodiment, the battery cell is a cylindrical battery, and the cover body 100 is integrally formed with the housing 10. Of course, in other embodiments, the battery cell can also be a battery of other shapes.

[0058] 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 (100), wherein the cover plate body (100) is provided with a mounting hole; A rubber-coated ring (200), the rubber-coated ring (200) being tightly fitted on the upper surface of the cover plate body (100); A pole (300), the pole (300) comprising a top plate (310) and a column barrel (320), the top plate (310) being located on a side of the rubber-coated ring (200) away from the cover plate body (100), one end of the column barrel (320) being connected to the top plate (310), and the other end being sequentially passed through the rubber-coated ring (200) and the mounting hole, with a gap being left between the pole (300) and the rubber-coated ring (200); A sealing ring (400) is sleeved on the column (320), and the sealing ring (400) passes through the rubber-encapsulated ring (200) and is clamped between the top plate (310) and the cover plate body (100).

2. The battery cover according to claim 1, characterized in that: The gap comprises a groove (301), the groove (301) being arranged on a surface of one side of the top plate (310) close to the cover plate body (100), and the groove (301) being located at an edge of the top plate (310).

3. The battery cover according to claim 2, characterized in that: The groove (301) extends circumferentially along the top plate (310) and is arranged in a closed loop.

4. The battery cover according to claim 2, characterized in that: There are multiple grooves (301), and the multiple grooves (301) are arranged at intervals along the circumference of the top plate (310).

5. The battery cover according to claim 1, characterized in that: The pole (300) is connected to the cover plate body (100) by riveting, so as to compress the sealing ring (400) and the rubber-encapsulated ring (200) to tightly fit and seal with the cover plate body (100).

6. The battery cover according to any one of claims 1 to 5, characterized in that: Part of the rubber-coated ring (200) is sandwiched between the top plate (310) and the cover plate body (100), and another part of the rubber-coated ring (200) is arranged around the outer periphery of the top plate (310).

7. The battery cover according to claim 6, characterized in that: A gap is left between the rubber-coated ring (200) and the outer periphery of the top plate (310).

8. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises an insulating plate (500), the insulating plate (500) covering the surface of the cover plate body (100) facing away from the rubber-encapsulated ring (200), and the column (320) passes through the insulating plate (500).

9. The battery cover according to claim 8, characterized in that: Part of the insulating plate (500) is sandwiched between the side wall of the column (320) and the mounting hole.

10. A battery cell, characterized in that The invention comprises a battery cell, a shell (10) and a battery cover according to any one of claims 1 to 9, wherein the battery cell is arranged in the shell (10), and the cover body (100) is covered at the opening of the shell (10).

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