Battery cover plate and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate and a battery. The battery cover plate comprises a cover plate body, the cover plate body is provided with a mounting hole penetrating and extending in the thickness direction of the cover plate body, and a supporting plate is arranged on the peripheral wall of the mounting hole in a sealing ring mode; the polar column is located in the mounting hole, and a connecting plate is arranged on the peripheral wall of the polar column in a sealing ring mode; the sealing ring is distributed around the axis of the mounting hole and is pressed on one surface, back to the battery box, of the supporting plate by the connecting plate; and the filling piece is filled among the peripheral wall of the polar column, the peripheral wall of the mounting hole and the supporting plate in a sealing manner and is used for fixing the connecting plate and the sealing ring. The battery cover plate disclosed by the utility model can prevent the post terminal from settling after being heated, and can keep good sealing performance between the post terminal and the cover plate body.

Description

Technical Field

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

[0002] like Figure 7 As shown, the existing battery cover includes a cover body 1 and a pole 2, the pole 2 is inserted into the cover body 1, a sealing ring 3 is provided between the bottom of the pole 2 and the bottom surface of the cover body 1, and the sealing ring 3 is pressed, and a cured sealant 6 is also provided between the pole 2 and the cover body 1, and the cured sealant 6 can clamp the pole 2 in the cover body 1.

[0003] However, when the pole 2 and the battery cell are welded, heat is transferred to the pole 2, causing the sealant 6 to soften. The softened sealant 6 has a reduced ability to engage the pole 2, causing the pole 2 to sink toward the battery box, thereby increasing the distance between the bottom of the pole 2 and the bottom surface of the cover body 1. If the pole sinks significantly, the sealing ring may not be pressed tightly by the bottom of the pole and the bottom surface of the cover body, resulting in reduced sealing of the battery cover. Utility Model Content

[0004] The utility model aims to overcome the problem in the prior art that the pole of the existing battery cover plate may sink after being heated.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a battery cover plate, which includes: a cover plate body, the cover plate body is provided with a mounting hole extending through it along the thickness direction, and the peripheral wall sealing ring of the mounting hole is provided with a support plate; a pole, the pole is located in the mounting hole, and the peripheral wall sealing ring of the pole is provided with a connecting plate; a sealing ring, the sealing ring is distributed around the axis of the mounting hole and is pressed by the connecting plate to the side of the support plate facing away from the battery box; and a filling piece, the filling piece is sealed and filled between the peripheral wall of the pole, the peripheral wall of the mounting hole and the support plate, and fixes the connecting plate and the sealing ring.

[0006] In some embodiments, the cover body is sealed with a limiting flap distributed around the pole, the limiting flap is folded from the side of the cover body facing away from the battery box toward the peripheral wall of the pole, and the filling piece is sealed and filled between the limiting flap and the support plate.

[0007] In some embodiments, the battery cover further includes an insulating plate surrounding the pole, and the insulating plate extends between the connecting plate and the hole wall of the mounting hole, between the connecting plate and the limiting flap, and between the pole and the limiting flap.

[0008] In some embodiments, a side of the connecting plate facing away from the battery box is provided with grooves distributed around the poles, and the openings of the grooves face the insulating plate.

[0009] In some embodiments, the battery cover further includes a covering member surrounding the pole, the covering member completely covers the side of the limiting flap facing away from the battery box and is fixedly connected to the filling member.

[0010] In some embodiments, the covering component and the filling component are integrally formed.

[0011] In some embodiments, a first sealing block is provided on one side of the connecting plate facing the sealing ring and is distributed around the axis of the mounting hole. A first sealing groove is provided on one side of the sealing ring facing the connecting plate and is distributed around the axis of the mounting hole. The first sealing block is sealingly embedded in the first sealing groove.

[0012] In some embodiments, a second sealing block is provided on one side of the sealing ring facing the support plate and is distributed around the axis of the mounting hole. A second sealing groove is provided on one side of the support plate facing the sealing ring and is distributed around the axis of the mounting hole. The second sealing block is sealingly embedded in the second sealing groove.

[0013] In some embodiments, the battery cover further comprises a plastic plate, and the plastic plate is connected to the cover body via a clamping mechanism so that the plastic plate is attached to a side of the cover body facing the battery box.

[0014] Another aspect of the utility model provides a battery, which includes a battery cell, a battery box and the battery cover plate. The battery cell is installed in the battery box, the battery cover plate is sealed and installed at the opening of the battery box, and the battery cell is conductively connected to the pole.

[0015] The technical solution of the utility model has the following beneficial effects:

[0016] The sealing ring is pressed by the connecting plate against the side of the support plate facing away from the battery box, so the support plate can support the sealing ring and the connecting plate, prevent the pole from sinking toward the battery box after being heated, and form a seal between the pole and the cover body. In addition, the filler is sealed and filled between the peripheral wall of the pole, the peripheral wall of the mounting hole and the support plate, and the filler fixes the connecting plate and the sealing ring, so that the connecting plate keeps pressing the sealing ring, and can also prevent the pole from moving away from the battery box. Therefore, the battery cover of the utility model can prevent the pole from sinking after being heated and can maintain good sealing between the pole and the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view schematic diagram of a battery cover plate in one embodiment of the utility model;

[0018] Figure 2 It is a bottom view schematic diagram of a battery cover plate in one embodiment of the utility model;

[0019] Figure 3 yes Figure 1 A partial enlarged schematic diagram of part A;

[0020] Figure 4 yes Figure 2 A schematic vertical cross-sectional view of portion B along the dotted line L;

[0021] Figure 5 It is a cross-sectional schematic diagram of a first sealing block in one embodiment of the utility model;

[0022] Figure 6 It is a cross-sectional schematic diagram of the second sealing groove in one embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of the installation of the pole in the existing battery cover.

[0024] Description of Reference Numerals

[0025] 1. Cover plate body; 11. Mounting hole; 12. Support plate; 121. Second sealing groove; 13. Position limiting flap; 14. Filling piece; 15. Cover piece; 16. Buckle; 2. Pole; 21. Connecting plate; 211. First sealing block; 22. Groove; 3. Sealing ring; 4. Insulating plate; 5. Plastic plate; 51. Perforation; 52. Card plate; 6. Sealant. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the utility model will be described in detail below. In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the utility model, rather than to limit the utility model. For those skilled in the art, the utility model can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the utility model by showing examples of the utility model.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a battery cover, which includes a cover body 1, a pole 2, a sealing ring 3 and a filling piece 14. The cover body 1 is provided with a mounting hole 11 extending through it in the thickness direction, and the sealing ring of the peripheral wall of the mounting hole 11 is provided with a support plate 12. The pole 2 is located in the mounting hole 11, and the sealing ring of the peripheral wall of the pole 2 is provided with a connecting plate 21. The sealing ring 3 is distributed around the axis of the mounting hole 11 and is pressed by the connecting plate 21 on the side of the support plate 12 facing away from the battery box. The filling piece 14 is sealed and filled between the peripheral wall of the pole 2, the peripheral wall of the mounting hole 11 and the support plate 12, and fixes the connecting plate 21 and the sealing ring 3.

[0028] Specifically, the sealing ring of the support plate 12 is arranged on the peripheral wall of the mounting hole 11, so the support plate 12 and the peripheral wall of the mounting hole 11 can be completely sealed. The sealing ring of the connecting plate 21 is arranged on the peripheral wall of the pole 2, so the connecting plate 21 and the pole 2 can be completely sealed. The outer diameter of the connecting plate 21 is smaller than the diameter of the mounting hole 11, and the diameter of the connecting plate 21 is between the inner diameter of the support plate 12 and its outer diameter. The sealing ring 3 is pressed between the connecting plate 21 and the support plate 12 to form a seal between the pole 2 and the cover plate body 1. The support plate 12 is located between the connecting plate 21 and the battery box, and the side of the support plate 12 facing away from the battery box and the side of the connecting plate 21 facing the battery box are opposite to each other, and the sealing ring 3 is pressed by the connecting plate 21 on the side of the support plate 12 facing away from the battery box. Of course, the connecting plate 21 and the support plate 12 are respectively fitted with the sealing ring 3. The filling piece 14 is filled between the peripheral wall of the pole 2, the peripheral wall of the mounting hole 11 and the support plate 12 to further form a seal between the peripheral wall of the mounting hole 11 and the peripheral wall of the pole 2, and the filling piece 14 can also be fixedly connected to the peripheral wall of the pole 2 and the peripheral wall of the mounting hole 11 to fix the connecting plate 21 and the sealing ring 3, so that the connecting plate 21 keeps pressing the sealing ring 3.

[0029] In this embodiment, the sealing ring 3 is pressed by the connecting plate 21 on the side of the support plate 12 facing away from the battery box, so the support plate 12 can support the sealing ring 3 and the connecting plate 21, prevent the pole 2 from settling toward the battery box after being heated, and form a seal between the pole 2 and the cover body 1. In addition, the filler 14 is sealed and filled between the peripheral wall of the pole 2, the peripheral wall of the mounting hole 11 and the support plate 12, and the filler 14 fixes the connecting plate 21 and the sealing ring 3, so that the connecting plate 21 keeps pressing the sealing ring 3, and can also prevent the pole 2 from moving away from the battery box. Therefore, the battery cover of the utility model can prevent the pole 2 from settling after being heated and can maintain good sealing between the pole 2 and the cover body 1.

[0030] In some embodiments, the support plate 12 and the cover body 1 can be integrally formed, and the side of the support plate 12 facing the battery box is flush with the side of the cover body 1 facing the battery box. The connecting plate 21 and the pole 2 can be integrally formed, and the side of the connecting plate 21 facing the battery box is flush with the side of the pole 2 facing the battery box.

[0031] like Figure 3 As shown, in some embodiments of the utility model, the cover body 1 is sealed with a limiting flap 13 distributed around the pole 2, the limiting flap 13 is folded from the side of the cover body 1 facing away from the battery box toward the peripheral wall of the pole 2, and the filling piece 14 is sealed and filled between the limiting flap 13 and the support plate 12.

[0032] Specifically, the limiting flap 13 includes a first flap extending along the axis of the mounting hole 11 and a second flap extending radially inwardly along the mounting hole 11, one end of the first flap is sealed and connected to a side of the cover body 1 facing away from the battery box, the other end of the first flap is sealed and connected to the outer side of the second flap, and the inner side of the second flap faces the peripheral wall of the pole 2. In the radial direction of the mounting hole 11, the width of the second flap is less than or equal to the width of the support plate 12. Preferably, in the radial direction of the mounting hole 11, the width of the second flap is less than the width of the support plate 12, that is, the inner diameter of the support plate 12 is less than the inner diameter of the second flap. In the axial direction of the mounting hole 11, a positioning space is formed between the limiting flap 13 and the support plate 12, the connecting plate 21 and the sealing ring 3 are both located in the positioning space, and the filling member 14 is sealed and filled in the positioning space, and the filling member 14 seals the positioning space. Furthermore, since the limiting flap 13 can squeeze the filling piece 14, the filling piece 14 further squeezes the connecting plate 21 and the sealing ring 3, and the sealing ring 3 is pressed between the connecting plate 21 and the support plate 12, which helps to further improve the sealing performance. Furthermore, the limiting flap 13 can fix the filling piece 14 to prevent the filling piece 14, the pole 2 and the sealing ring 3 from moving away from the support plate 12.

[0033] In other embodiments, the cross section of the limit flap 13 may be L-shaped or arc-shaped in the axial direction of the mounting hole 11, and the utility model does not limit this. The limit flap 13 and the cover body 1 may be integrally formed or welded to ensure sealing.

[0034] In some embodiments, the support plate 12 is located close to the battery box, and the side of the support plate 12 facing the battery box is flush with the side of the cover body 1 facing the battery box. The thickness of the support plate 12 is less than the thickness of the cover body 1, so that the filling piece 14 is arranged to fix the connecting plate 21 and the sealing ring 3.

[0035] like Figure 3 As shown, in some embodiments of the utility model, the battery cover also includes an insulating plate 4 surrounding the pole 2, and the insulating plate 4 extends between the connecting plate 21 and the hole wall of the mounting hole 11, between the connecting plate 21 and the limiting flap 13, and between the pole 2 and the limiting flap 13.

[0036] Specifically, in the axial direction of the mounting hole 11, the insulating plate 4 includes a first insulating plate, a second insulating plate and a third insulating plate. The first insulating plate extends along the axial direction of the mounting hole 11, and is located between the connecting plate 21 and the peripheral wall of the mounting hole 11 and between the connecting plate 21 and the first flap. The head end of the first insulating plate faces the support plate 12 and is a free end, and the end of the first insulating plate faces the second flap. The second insulating plate extends along the radial direction of the mounting hole 11, and is located between the first flap and the pole 2. The head end of the second insulating plate faces the first flap and is connected to the end of the first insulating plate, and the end of the second insulating plate faces the pole 2. The third insulating plate extends along the axial direction of the mounting hole 11, and is located between the pole 2 and the first flap and between the second flap and the pole 2. The head end of the third insulating plate is connected to the end of the second insulating plate, and the end of the third insulating plate is a free end. The insulating plate 4 can be an integrally formed structural member. The filler 14 is sealed and filled in the gaps between the limiting flap 13, the support plate 12, the peripheral wall of the mounting hole 11 and the pole 2. For example, the filler 14 is filled in the gap between the insulating plate 4 and the support plate 12, the gap between the insulating plate 4 and the pole 2, and the gap between the insulating plate 4 and the limiting flap 13.

[0037] like Figure 3 and Figure 5 As shown, in some embodiments of the present invention, a side of the connecting plate 21 facing away from the battery box is provided with a groove 22 distributed around the pole 2 , and the opening of the groove 22 faces the insulating plate 4 .

[0038] Specifically, the filler 14 is usually formed by injecting the injection molding material into the gap between the limit flap 13 and the support plate 12 through an injection molding process. The gap between the insulating plate 4 and the connecting plate 21 is small and may not be completely filled, resulting in the formation of a cavity and reducing the sealing performance. However, the groove 22 can increase the gap between the insulating plate 4 and the connecting plate 21, which helps to be fully filled with the injection molding material, so that the filler 14 can be fully filled between the insulating plate 4 and the connecting plate 21, thereby improving the sealing performance.

[0039] In some embodiments, the groove 22 is adjacent to the pole 2 , and the peripheral wall of the pole 2 becomes a side wall of the groove 22 , so as to fully fill the groove 22 .

[0040] like Figure 1 and Figure 3 As shown, in some embodiments of the present invention, the battery cover further includes a covering member 15 surrounding the pole 2 , the covering member 15 completely covers the side of the limiting flap 13 facing away from the battery box and is fixedly connected to the filling member 14 .

[0041] Specifically, the covering member 15 is disposed between the peripheral wall of the pole 2 and the side of the cover body 1 facing away from the battery box, and the peripheral wall of the pole 2 and the side of the cover body 1 facing away from the battery box are respectively sealed and connected to the covering member 15 to further ensure the sealing between the pole 2 and the peripheral wall of the mounting hole 11. Moreover, the covering member 15 can fix the position of the limiting flap 13 to prevent the limiting flap 13 from deforming in the direction away from the battery box. In addition, a part of the covering member 15 is filled between the limiting flap 13 and the pole 2 and connected to the filling member 14 as a whole to further fix the limiting flap 13, the connecting plate 21 and the sealing ring 3.

[0042] like Figure 3 As shown, in some embodiments of the present invention, the covering member 15 and the filling member 14 are integrally formed. Therefore, the covering member 15 and the filling member 14 are a whole, which can not only fill the gap between the peripheral wall of the mounting hole 11 and the pole 2, but also completely cover the limiting flap 13 to fix the limiting flap 13, the connecting plate 21 and the sealing ring 3.

[0043] In some embodiments, the covering member 15 and the filling member 14 may be injection molding materials, such as polyphenylene sulfide materials. The covering member 15 and the filling member 14 may be made by injection molding process.

[0044] like Figure 3 and Figure 5 As shown, in some embodiments of the utility model, a side of the connecting plate 21 facing the sealing ring 3 is provided with a first sealing block 211 distributed around the axis of the mounting hole 11, and a side of the sealing ring 3 facing the connecting plate 21 is provided with a first sealing groove distributed around the axis of the mounting hole 11, and the first sealing block 211 is sealed and embedded in the first sealing groove.

[0045] Specifically, through the cooperation between the first sealing block 211 and the first sealing groove, the sealing performance between the sealing ring 3 and the connecting plate 21 can be improved, and the misalignment between the pole 2 and the sealing ring 3 can be prevented.

[0046] In some embodiments, in the axial direction of the mounting hole 11, the cross-section of the first sealing block 211 and the cross-section of the first sealing groove may be V-shaped, and the side surfaces of the two first sealing blocks 211 are respectively attached to the groove side walls of the two first sealing grooves. In other embodiments, in the axial direction of the mounting hole 11, the cross-section of the first sealing block 211 and the cross-section of the first sealing groove are both semicircular or rectangular.

[0047] like Figure 3 and Figure 6As shown, in some embodiments of the utility model, a side of the sealing ring 3 facing the support plate 12 is provided with a second sealing block distributed around the axis of the mounting hole 11, and a side of the support plate 12 facing the sealing ring 3 is provided with a second sealing groove 121 distributed around the axis of the mounting hole 11, and the second sealing block is sealed and embedded in the second sealing groove 121.

[0048] Specifically, through the cooperation between the second sealing block and the second sealing groove 121 , the sealing performance between the sealing ring 3 and the support plate 12 can be improved, and the sealing ring 3 can be prevented from moving relative to the support plate 12 .

[0049] In some embodiments, in the axial direction of the mounting hole 11, the cross-section of the second sealing block and the cross-section of the second sealing groove 121 may be V-shaped, and the side surfaces of the two second sealing blocks are respectively attached to the groove side walls of the two second sealing grooves 121. In other embodiments, in the axial direction of the mounting hole 11, the cross-section of the second sealing block and the cross-section of the second sealing groove 121 are both semicircular or rectangular.

[0050] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the battery cover further comprises a plastic plate 5, and the plastic plate 5 is connected to the cover body 1 via a clamping mechanism so that the plastic plate 5 is attached to a side of the cover body 1 facing the battery box.

[0051] Specifically, the plastic plate 5 can be disposed between the cover body 1 and the battery box. The plastic plate 5 has a certain elasticity, which helps to ensure the sealing between the cover body 1 and the battery box.

[0052] like Figure 4 As shown, in some embodiments, a buckle 16 is provided on one side of the cover body 1 facing the battery box, a through hole 51 extending through the plastic plate 5 is provided, a clamping plate 52 extending along the plane of the plastic plate 5 is provided in the through hole 51, the buckle 16 is located in the through hole 51, and the clamping plate 52 is clamped between the buckle 16 and the cover body 1. Of course, any other clamping mechanism that can achieve the above technical effects can also be used between the plastic plate 5 and the cover body 1, and the utility model will not list them.

[0053] The utility model also provides a battery, which includes a battery cell, a battery box and the battery cover plate. The battery cell is installed in the battery box, the battery cover plate is sealed and installed at the opening of the battery box, and the battery cell is conductively connected to the pole 2.

[0054] Specifically, the battery adopts the above-mentioned battery cover, so the battery can also achieve the technical effects of the above-mentioned embodiments.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above are only preferred implementation methods of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the utility model, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A battery cover, characterized in that: include: A cover plate body (1), the cover plate body (1) being provided with a mounting hole (11) extending through the cover plate body along a thickness direction thereof, and a peripheral wall sealing ring of the mounting hole (11) being provided with a supporting plate (12); A pole (2), the pole (2) being located in the mounting hole (11), and a peripheral wall sealing ring of the pole (2) being provided with a connecting plate (21); a sealing ring (3), the sealing ring (3) being distributed around the axis of the mounting hole (11) and being pressed by the connecting plate (21) against a side of the supporting plate (12) facing away from the battery box; and A filling piece (14) is sealed and filled between the peripheral wall of the pole (2), the peripheral wall of the mounting hole (11) and the support plate (12), and fixes the connecting plate (21) and the sealing ring (3).

2. The battery cover according to claim 1, characterized in that: The cover body (1) is sealed with a limiting flap (13) distributed around the pole (2); the limiting flap (13) is folded from the side of the cover body (1) facing away from the battery box toward the peripheral wall of the pole (2); and the filling piece (14) is sealed and filled between the limiting flap (13) and the support plate (12).

3. The battery cover according to claim 2, characterized in that: The battery cover plate also includes an insulating plate (4) surrounding the pole (2), and the insulating plate (4) extends between the connecting plate (21) and the hole wall of the mounting hole (11), between the connecting plate (21) and the limiting flap (13), and between the pole (2) and the limiting flap (13).

4. The battery cover according to claim 3, characterized in that: A groove (22) distributed around the pole (2) is provided on the side of the connecting plate (21) facing away from the battery box, and the opening of the groove (22) faces the insulating plate (4).

5. The battery cover according to claim 2, characterized in that: The battery cover plate also includes a covering member (15) surrounding the pole (2), wherein the covering member (15) completely covers the side of the limiting flap (13) facing away from the battery box and is fixedly connected to the filling member (14).

6. The battery cover according to claim 5, characterized in that: The covering piece (15) and the filling piece (14) are integrally formed.

7. The battery cover according to any one of claims 1 to 6, characterized in that: A first sealing block (211) is provided on one side of the connecting plate (21) facing the sealing ring (3) and is distributed around the axis of the mounting hole (11); a first sealing groove is provided on one side of the sealing ring (3) facing the connecting plate (21) and is distributed around the axis of the mounting hole (11); the first sealing block (211) is sealingly embedded in the first sealing groove.

8. The battery cover according to claim 7, characterized in that: A second sealing block is provided on one side of the sealing ring (3) facing the support plate (12) and is distributed around the axis of the mounting hole (11); a second sealing groove (121) is provided on one side of the support plate (12) facing the sealing ring (3) and is distributed around the axis of the mounting hole (11); the second sealing block is sealingly embedded in the second sealing groove (121).

9. The battery cover according to any one of claims 1 to 6, characterized in that: The battery cover also includes a plastic plate (5), and the plastic plate (5) is connected to the cover body (1) via a clamping mechanism so that the plastic plate (5) is attached to a side of the cover body (1) facing the battery box.

10. A battery, characterized in that: It comprises a battery cell, a battery box and a battery cover according to any one of claims 1 to 9, wherein the battery cell is installed in the battery box, the battery cover is sealed and installed at the opening of the battery box, and the battery cell is conductively connected to the pole (2).

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