Battery cover plate and power battery
By setting an annular boss and a rubber ring between the battery cover and the pole bottom plate, the sealing is enhanced, the problem of helium leakage is solved, and the yield rate of the power battery is improved.
Patent Information
- Application Number
- CN202422310631.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-09-23
AI Technical Summary
There are foreign objects or scratches on the cover and bottom plate of the power battery, which makes it easy for helium molecules to pass through. During the helium inspection, the product is judged as defective and the yield rate is low.
Multiple annular bosses are set between the cover plate and the pole bottom plate to form multiple sealing rings to enhance the sealing performance, and the structural strength and sealing are improved by the rubber-coated ring and insulating plate.
The sealing performance of the battery cover is improved, the leakage of helium molecules is avoided, and the battery yield is improved.
Smart Images
Figure CN223390663U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a power battery. Background Art
[0002] Typically, a power battery cover consists of a cover plate, a terminal, and a sealing ring. The sealing ring is pressed against the bottom surface of the cover plate and the top surface of the terminal base plate to seal the cover plate. However, during actual production, foreign matter or scratches may appear on both the bottom surface of the cover plate and the top surface of the base plate. During the full helium inspection of power batteries, helium molecules (the smallest molecules besides hydrogen) can easily pass through the channels formed by foreign matter or scratches, causing the equipment to detect and determine that the product is defective, resulting in a high defect rate.
[0003] Therefore, there is an urgent need to provide a battery cover and a power battery to solve the above problems. Utility Model Content
[0004] The first object of the present utility model is to provide a battery cover plate with good sealing performance and high yield.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] Battery cover, including:
[0007] A cover plate, wherein the cover plate is provided with a mounting hole;
[0008] The pole comprises a column and a base plate, one end of the column is connected to the base plate, and the other end of the column is passed through the bottom of the cover plate and is arranged in the mounting hole;
[0009] A sealing member, wherein the sealing member is provided with a through hole, the sealing member is sleeved on the column through the through hole, and is clamped between the cover plate and the bottom plate, and a plurality of annular bosses are provided on one of the bottom surface of the cover plate and the top surface of the sealing member, and the annular bosses are all extended in a closed loop along the outer circumference of the corresponding mounting hole or the outer circumference of the through hole, and the plurality of annular bosses are radially spaced along the mounting hole or the through hole, and the end faces of the annular bosses are all in contact with the other of the bottom surface of the cover plate and the top surface of the sealing member.
[0010] As an optional technical solution for the battery cover, a plurality of annular bosses are located on the top surface of the sealing member.
[0011] As an optional technical solution for the battery cover, the seal includes a first sealing part and a second sealing part connected to each other, the first sealing part is clamped between the inner wall of the mounting hole and the outer wall of the column, the second sealing part is clamped between the cover plate and the bottom plate, and the annular boss is located on the top surface of the second sealing part.
[0012] As an optional technical solution for the battery cover, the battery cover also includes a rubber-wrapped ring, part of the rubber-wrapped ring passes through the mounting hole and is clamped between the inner wall of the mounting hole and the outer wall of the column, and the other part of the rubber-wrapped ring is located on the top surface of the cover sheet and is surrounded by the outer wall of the column.
[0013] As an optional technical solution for the battery cover, a first groove is provided on the circumference of the outer wall of the column, and a first convex portion is provided on the circumference of the inner wall of the rubber-coated ring. The first convex portion is adapted to the shape of the first groove, and the first convex portion is clamped in the first groove.
[0014] As an optional technical solution for the battery cover, the bottom surface of the rubber-coated ring is provided with a second groove, and the top surface of the cover plate is provided with a second protrusion along the outer circumference of the mounting hole, and the second protrusion is clamped in the second groove.
[0015] As an optional technical solution for the battery cover, a card slot is provided on the top surface of the second protrusion, and a card block is provided on the bottom wall of the second groove, and the card block is locked in the card slot.
[0016] As an optional technical solution for the battery cover, the battery cover also includes an insulating plate, which is attached to the bottom surface of the cover sheet, the column passes through the insulating plate, and the bottom plate abuts against the bottom surface of the insulating plate.
[0017] As an optional technical solution for the battery cover, a third groove is provided at the bottom of the insulating plate, and the bottom plate is clamped in the third groove.
[0018] A second object of the present utility model is to provide a power battery with good sealing performance and high yield rate.
[0019] To achieve this purpose, the present invention adopts the following technical solutions:
[0020] A power battery is characterized by comprising a shell, a battery cell and the above-mentioned battery cover plate, wherein the battery cell is arranged in the shell, and the cover plate is sealed at the opening of the shell.
[0021] Beneficial effects of the utility model:
[0022] The battery cover provided by the utility model includes a cover plate, a pole and a seal. The cover plate is provided with a mounting hole for inserting and installing the pole. The pole includes a column and a base plate, one end of the column is connected to the base plate, and the other end is inserted into the mounting hole from the bottom of the cover plate. The seal is provided with a through hole, which is sleeved on the column through the through hole and clamped between the cover plate and the base plate to seal the cover plate and the pole base plate. A plurality of annular bosses are provided on one of the bottom surface of the cover plate and the top surface of the seal, and the annular bosses are all extended in a closed loop along the outer circumference of the corresponding mounting hole or the outer circumference of the through hole, and the plurality of annular bosses are radially spaced and distributed along the mounting hole or the through hole, and the end faces of the annular bosses are all in contact with the other of the bottom surface of the cover plate and the top surface of the seal. Each annular boss can form a sealing ring between the cover plate and the pole base plate, thereby strengthening the seal between the cover plate and the pole base plate. Multiple annular bosses are provided to form multiple sealing rings, thereby providing multiple sealing protections between the cover plate and the terminal base plate, thereby improving the sealing performance of the battery cover. Furthermore, the multiple sealing protections of the battery cover prevent helium molecules from escaping during helium testing of the power battery, thereby improving the yield rate of the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a partial cross-sectional view of a battery cover provided by an embodiment of the present utility model;
[0024] Figure 2 This is a schematic structural diagram of a sealing member of a battery cover provided by an embodiment of the present utility model;
[0025] Figure 3 This is a schematic diagram of the partial structure of the battery cover provided by the embodiment of the utility model. Figure 1 ;
[0026] Figure 4 This is a schematic diagram of the partial structure of the battery cover provided by the embodiment of the utility model. Figure 2 ;
[0027] Figure 5 This is a schematic structural diagram of a pole of a battery cover provided by an embodiment of the present utility model;
[0028] Figure 6 This is a schematic diagram of the structure of the rubber-coated ring of the battery cover provided by the embodiment of the utility model Figure 1 ;
[0029] Figure 7 This is a schematic diagram of the structure of the rubber-coated ring of the battery cover provided by the embodiment of the utility model Figure 2 ;
[0030] Figure 8 This is a schematic diagram of the partial structure of the insulating plate of the battery cover provided by the embodiment of the utility model Figure 1 ;
[0031] Figure 9 This is a schematic diagram of the partial structure of the insulating plate of the battery cover provided by the embodiment of the utility model Figure 2 ;
[0032] Figure 10 It is a structural schematic diagram of a battery cover provided by an embodiment of the present utility model.
[0033] In the picture:
[0034] 100, cover plate; 110, second protrusion; 101, mounting hole; 102, slot; 103, fourth groove; 200, pole; 210, column; 220, bottom plate; 201, first groove; 300, seal; 310, first sealing portion; 320, second sealing portion; 400, annular boss; 500, rubber-coated ring; 510, first protrusion; 520, block; 502, second groove; 600, insulating plate; 610, third protrusion; 601, third groove. DETAILED DESCRIPTION
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 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.
[0039] The battery cover provided by this embodiment has good sealing performance and high yield rate.
[0040] Specific as Figures 1 to 5 As shown, the battery cover includes a cover plate 100, a terminal 200, and a seal 300. The cover plate 100 is provided with a mounting hole 101. The terminal 200 includes a column 210 and a base plate 220. One end of the column 210 is connected to the base plate 220, and the other end of the column 210 extends from the bottom of the cover plate 100 into the mounting hole 101. The seal 300 is provided with a through hole. The seal 300 is inserted through the through hole and is mounted on the column 210 and sandwiched between the cover plate 100 and the base plate 220. A plurality of annular bosses 400 are provided on one of the bottom surface of the cover plate 100 and the top surface of the seal 300. The annular bosses 400 are all arranged in a closed loop along the outer circumference of the corresponding mounting hole 101 or the outer circumference of the through hole, and the plurality of annular bosses 400 are distributed at radial intervals along the mounting hole 101 or the through hole. The end faces of the annular bosses 400 are all in contact with the other of the bottom surface of the cover plate 100 and the top surface of the seal 300.
[0041] Based on the above design, the cover plate 100 is provided with a mounting hole 101 for inserting and mounting the pole 200. The seal 300 is provided with a through-hole, which is inserted through the through-hole to be mounted on the column 210 and sandwiched between the cover plate 100 and the base plate 220 to seal the cover plate 100 and the base plate 220 of the pole 200. A plurality of annular bosses 400 are provided on either the bottom surface of the cover plate 100 or the top surface of the seal 300. Each of the annular bosses 400 extends in a closed loop along the outer circumference of the corresponding mounting hole 101 or through-hole. The multiple annular bosses 400 are radially spaced apart along the mounting hole 101 or through-hole, and the end faces of the annular bosses 400 abut against the other of the bottom surface of the cover plate 100 and the top surface of the seal 300. Each annular boss 400 forms a sealing ring between the cover plate 100 and the bottom plate 220 of the terminal 200, strengthening the seal between the cover plate 100 and the bottom plate 220 of the terminal 200. Providing multiple annular bosses 400 creates multiple sealing rings, thereby providing multiple sealing protections between the cover plate 100 and the bottom plate 220 of the terminal 200, thereby improving the sealing performance of the battery cover. Furthermore, the multiple sealing protections of the battery cover prevent helium molecules from escaping during helium testing of the power battery, thereby improving the yield rate of the battery cover.
[0042] In this embodiment, continue as Figure 2 As shown, the annular boss 400 is located on the top surface of the sealing member 300. Therefore, the annular bosses 400 are all arranged in a closed loop along the outer circumference of the mounting hole 101, and multiple annular bosses 400 are distributed radially along the mounting hole 101 at intervals, and the end surfaces of the annular bosses 400 are all in contact with the bottom surface of the cover plate 100.
[0043] Optionally, the annular boss 400 is integrally formed with the sealing member 300 and is made of plastic material, and is in contact with the bottom surface of the cover plate 100 , thereby achieving good sealing performance.
[0044] Furthermore, to further enhance the seal between the cover plate 100 and the pole 200, the seal 300 includes a first sealing portion 310 and a second sealing portion 320 that are interconnected. The first sealing portion 310 is sandwiched between the inner wall of the mounting hole 101 and the outer wall of the column 210, and the second sealing portion 320 is sandwiched between the cover plate 100 and the bottom plate 220. The annular boss 400 is located on the top surface of the second sealing portion 320. The seal 300 not only seals the gap between the cover plate 100 and the bottom plate 220 of the pole 200, but also seals the gap between the inner wall of the mounting hole 101 and the column 210.
[0045] like Figure 6 and Figure 7 As shown, the battery cover also includes a rubber ring 500, part of which passes through the mounting hole 101 and is clamped between the inner wall of the mounting hole 101 and the outer wall of the column 210, and the other part of the rubber ring 500 is located on the top surface of the cover sheet 100 and is surrounded by the outer wall of the column 210, isolating and protecting the cover sheet 100 and the pole 200.
[0046] In order to increase the wrapping, isolation and protection of the rubber-coated ring 500 on the pole 200, a first groove 201 is circumferentially provided on the outer wall of the column 210, and a first protrusion 510 is circumferentially provided on the inner ring wall of the rubber-coated ring 500. The first protrusion 510 is adapted to the shape of the first groove 201 and is snap-fitted into the first groove 201.
[0047] In this embodiment, continue as Figure 5 As shown, a groove is provided on the outer edge of the top surface of the column 210 , and the groove surface of the groove is flush with the top surface of the rubber-encapsulated ring 500 .
[0048] Furthermore, the bottom surface of the rubber-encapsulated ring 500 is provided with a second groove 502, and the top surface of the cover plate 100 is provided with a second protrusion 110 along the outer circumference of the mounting hole 101. The second protrusion 110 engages with the second groove 502. The provision of the second protrusion 110 increases the thickness of the cover plate 100 at the outer periphery of the mounting hole 101, thereby enhancing the structural strength of the cover plate 100 at the outer periphery of the mounting hole 101. Furthermore, the snap connection between the second protrusion 110 and the second groove 502 enhances the connection strength and sealing performance between the cover plate 100 and the rubber-encapsulated ring 500.
[0049] Furthermore, to prevent the rubber ring 500 from rotating relative to the cover plate 100 , a slot 102 is defined on the top surface of the second protrusion 110 , and a block 520 is defined on the bottom wall of the second groove 502 . The block 520 is locked in the slot 102 .
[0050] Continue as Figure 1 、 Figure 8 and Figure 9 As shown, in order to isolate the cover plate 100 and the battery cell, the battery cover further includes an insulating plate 600 . The insulating plate 600 is attached to the bottom surface of the cover plate 100 , the column 210 passes through the insulating plate 600 , and the bottom plate 220 abuts against the bottom surface of the insulating plate 600 .
[0051] Furthermore, a third groove 601 is provided at the bottom of the insulating plate 600, and the bottom plate 220 is clamped in the third groove 601, so that the top surface and side wall of the bottom plate 220 respectively abut against the bottom wall and side wall of the third groove 601, thereby increasing the insulation protection of the insulating plate 600 to the pole 200.
[0052] Continue as Figure 1 、 Figure 8 and Figure 9 As shown, the top surface of the insulating plate 600 is provided with a third protrusion 610, and the bottom surface of the cover plate 100 is provided with a fourth groove 103 along the circumference of the mounting hole 101. The third protrusion 610 is engaged with the fourth groove 103. The provision of the third protrusion 610 increases the thickness of the insulating plate 600, thereby enhancing the structural strength of the junction plate. The contact of the third protrusion 610 with the fourth groove 103 strengthens the connection between the cover plate 100 and the insulating plate 600, thereby enhancing the structural strength and sealing of the battery cover.
[0053] In this embodiment, the sealing member 300 , the rubber-encapsulated ring 500 and the insulating plate 600 are all insulating plastic members.
[0054] It should be noted that, in this embodiment, Figure 10 As shown, the battery cover includes a positive electrode column and a negative electrode column, and two symmetrically distributed mounting holes 101 are provided along the length direction of the cover plate 100.
[0055] Therefore, the battery cover includes two sealing members 300 and two rubber-encapsulated rings 500 .
[0056] In this embodiment, the structure and assembly method of the positive electrode column and the negative electrode column are the same, which will not be described in detail. In other embodiments, the structure and assembly method of the positive electrode column and the negative electrode column can also be different, and can be set according to the needs of use.
[0057] The power battery provided in this embodiment has good sealing performance and high yield rate.
[0058] Specifically, the power battery includes a shell, a battery cell and the battery cover plate. The battery cell is arranged in the shell, and the cover plate sheet 100 blocks the opening of the shell.
[0059] 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 (100), wherein the cover plate (100) is provided with a mounting hole (101); A pole (200), the pole (200) comprising a column (210) and a base plate (220), one end of the column (210) being connected to the base plate (220), and the other end of the column (210) being passed through the bottom of the cover plate (100) and disposed in the mounting hole (101); A sealing member (300), wherein the sealing member (300) is provided with a through hole, the sealing member (300) is sleeved on the column (210) through the through hole, and is clamped between the cover plate (100) and the bottom plate (220), and a plurality of annular bosses (400) are provided on one of the bottom surface of the cover plate (100) and the top surface of the sealing member (300), and the annular bosses (400) are all extended in a closed loop along the outer circumference of the corresponding mounting hole (101) or the outer circumference of the through hole, and the plurality of annular bosses (400) are distributed radially at intervals along the mounting hole (101) or the through hole, and the end faces of the annular bosses (400) are all in contact with the corresponding annular grooves on the other of the bottom surface of the cover plate (100) and the top surface of the sealing member (300).
2. The battery cover according to claim 1, characterized in that: The plurality of annular bosses (400) are located on the top surface of the sealing member (300).
3. The battery cover according to claim 2, characterized in that: The sealing member (300) comprises a first sealing portion (310) and a second sealing portion (320) connected to each other, wherein the first sealing portion (310) is sandwiched between the inner wall of the mounting hole (101) and the outer wall of the column (210), and the second sealing portion (320) is sandwiched between the cover plate (100) and the bottom plate (220), and the annular boss (400) is located on the top surface of the second sealing portion (320).
4. The battery cover according to claim 1, characterized in that: The battery cover plate further includes a rubber-encapsulated ring (500), part of the rubber-encapsulated ring (500) passes through the mounting hole (101) and is clamped between the inner wall of the mounting hole (101) and the outer wall of the column (210), and another part of the rubber-encapsulated ring (500) is located on the top surface of the cover plate (100) and is surrounded by the outer wall of the column (210).
5. The battery cover according to claim 4, characterized in that: The outer wall of the column (210) is circumferentially provided with a first groove (201), and the inner ring wall of the rubber-coated ring (500) is circumferentially provided with a first convex portion (510), the first convex portion (510) is adapted to the shape of the first groove (201), and the first convex portion (510) is clamped in the first groove (201).
6. The battery cover according to claim 5, characterized in that: The bottom surface of the rubber-encapsulated ring (500) is provided with a second groove (502), and the top surface of the cover plate (100) is provided with a second protrusion (110) along the outer circumference of the mounting hole (101), and the second protrusion (110) is engaged with the second groove (502).
7. The battery cover according to claim 6, characterized in that: A clamping groove (102) is provided on the top surface of the second protrusion (110), and a clamping block (520) is provided on the bottom wall of the second groove (502), wherein the clamping block (520) is clamped in the clamping groove (102).
8. The battery cover according to claim 1, characterized in that: The battery cover plate further comprises an insulating plate (600), wherein the insulating plate (600) is attached to the bottom surface of the cover plate (100), the column (210) passes through the insulating plate (600), and the bottom plate (220) abuts against the bottom surface of the insulating plate (600).
9. The battery cover according to claim 8, characterized in that: A third groove (601) is provided at the bottom of the insulating plate (600), and the bottom plate (220) is clamped in the third groove (601).
10. A power battery, characterized in that: The battery comprises a shell, a battery cell and the battery cover according to any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the cover sheet (100) is sealed at the opening of the shell.