Battery end cover

Abstract

The utility model discloses a battery end cover, relates to a battery accessory, and aims to solve the problems that when a negative electrode bottom cover is assembled, an additional convex ring structure is needed to prevent a sealing ring from being separated from the negative electrode bottom cover, but additional shaping is needed when the negative electrode bottom cover is bent and curled for sealing. The outer surface of the center of the cover body sinks towards the inner cavity of the cover body to form a conical concave part, a conical convex part used for abutting against the end of the current collector is formed on the side, located in the inner cavity, of the cover body, and the edge of the cover body is cold-pressed towards the direction of the plane where the conical concave part is located to form a flanging part. According to the utility model, reliable connection between the current collector and the battery end cover as well as between the current collector and adjacent batteries in series connection is realized through the arrangement of the conical concave part and the conical convex part, and the friction force between the battery end cover and the sealing ring is increased through the deformation seam and the rough part arranged on the flanging part, so that reliable connection is realized by sleeving the sealing ring outside the battery end cover; and subsequent sealing operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery accessory, more specifically, it relates to a battery end cover. BACKGROUND

[0002] The battery negative electrode bottom cover is a component arranged at the battery negative electrode end, which mainly plays a role of contacting and conducting electricity with external circuit, and plays a role of fixing and supporting the sealing ring during the use of the battery, and the air release hole arranged on the battery negative electrode bottom cover also plays a role of safe air release.

[0003] The Chinese patent with the publication number CN105958081B discloses a battery current collector and a battery assembly method, and the technical points are as follows: the battery current collector comprises a sealing ring, a negative electrode bottom cover and a conductive nail, the conductive nail passes through the center hole of the sealing ring and is welded with the negative electrode bottom cover, the negative electrode bottom cover is embedded in the sealing ring, the sealing ring comprises a first outer peripheral part and a main plane, the main plane is provided with a weak part, the first outer peripheral part of the sealing ring is in a bell mouth shape, the root diameter of the first outer peripheral part is smaller than the opening part diameter of the first outer peripheral part, and the advantages are as follows: during the process that the current collector is inserted into the opening part of the steel shell, only the outer peripheral part of the sealing ring and the negative electrode bottom cover is subjected to the radial force, the influence on the bottom cover plane of the negative electrode bottom cover and the main plane of the sealing ring is very small, and the center weak part of the sealing ring is not damaged.

[0004] Referring to the drawings of the above-mentioned patent Figure 2 to the drawings Figure 3 When the existing alkali battery negative electrode bottom cover and the battery current collector are assembled, and the alkali battery negative electrode bottom cover and the steel shell and the sealing ring are assembled, the negative electrode bottom cover needs to be abutted by the structure of the convex ring to limit the outward movement of the negative electrode bottom cover, and then during the assembly, the opening of the steel shell needs to be bent and curled to be compressed in the radial direction to be sealed, and in terms of operation and raw material, the convex ring needs to be used as the edge of the alkali battery negative electrode bottom cover, and after compression, the sealing ring needs to be shaped.

[0005] Therefore, a new scheme needs to be proposed to solve the problem. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a battery end cover.

[0007] The above technical purpose of the utility model is realized by the following technical scheme: the battery end cover comprises a cover body in an integrated structure, the outer surface of the cover body at the center is recessed to form a tapered recess in the inner cavity of the cover body, one side of the inner cavity of the cover body is formed with a tapered convex part for abutting with the end part of the current collector, the edge of the cover body is cold-pressed to form a flange part in the direction of the plane where the tapered recess is located, and a plurality of abutting parts for abutting with the sealing ring are formed on the flange part.

[0008] By adopting the technical scheme, the cover body with the integral structure has good overall strength, the taper recess and the taper protrusion arranged through the recess and the protrusion can realize that when the battery end cover is in contact with the current collector and the positive terminal, the contact area of the current collector and the battery end cover is increased when the current collector is in contact through the structure of the taper protrusion, the tip of the taper protrusion is located at the middle position of the end portion of the current collector, and the offset of the current collector is limited, and the structure of the taper recess can guide the positive terminal, so that the stability between the batteries is improved when the batteries are connected in series.

[0009] The utility model further sets up: the outer surface of the contact part forms the rough part for increasing the friction between the sealing ring.

[0010] By adopting the technical scheme, the rough part is arranged, the friction between the contact part and the sealing ring is increased, so that the basic connection strength between the battery end cover and the sealing ring is realized when the convex ring and other structures are not arranged, and the separation of the battery end cover and the current collector and the loosening of the battery end cover are limited.

[0011] The utility model further sets up: the flanging part is equipped with even deformation seam.

[0012] By adopting the technical scheme, the deformation seam is arranged on the flanging part, the part between the two deformation seams has the deformation capacity, the connection strength between the sealing ring and the flanging part is improved by adjusting the formation degree between the two deformation seams.

[0013] The utility model further sets up: the rough part is semispherical convex part structure, the arc convex surface of rough part is arranged to the direction of taper recess.

[0014] By adopting the technical scheme, the rough part is semispherical convex part structure, and is arranged to the direction of taper recess, the contact area between the flanging part and the sealing ring is increased, the connection firmness of the battery end cover and the sealing ring is increased, and the normal edge sealing operation is not affected when the battery end cover is edge sealed.

[0015] The utility model further sets up: the flanging part is equipped with arc recess on the side to the taper recess, and the semispherical convex part structure of the arc recess and the rough part is arranged to the same center.

[0016] By adopting the technical scheme, the arc recess is formed when the semispherical convex part structure is formed, the material is saved, the convex and concave structure is formed, and the stability of the structure is improved.

[0017] The utility model further sets up: the depth of taper recess and taper protrusion gradually increases from the periphery of cover body to the center, and the maximum depth of taper recess or taper protrusion is 1-1.5cm.

[0018] By adopting the technical scheme, the maximum depth of the conical concave part and the conical convex part is controlled to be 1-1.5 cm, so that the clearance between the two batteries in series connection can be controlled when the current collector is connected and positioned.

[0019] In conclusion, the utility model has the following beneficial effects:

[0020] The cover body with the integral structure has good overall strength, and the conical concave part and the conical convex part arranged by the concave part and the convex part can increase the contact area of the current collector and the battery end cover when the current collector is in contact with the battery end cover, and the tip of the conical convex part is located at the middle part of the end part of the current collector, so that the offset of the current collector is limited, and the conical concave part can also guide the positive end, so that the stability between the batteries in series connection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a sectional view of the utility model in an assembled state with a current collector and a sealing ring;

[0022] Figure 2 It is a sectional view of the utility model in an assembled state with a current collector and a sealing ring; Figure 1 It is an enlarged schematic view of the middle B;

[0023] Figure 3 It is an enlarged schematic view of the middle B; Figure 1 It is an enlarged schematic view of the middle A;

[0024] Figure 4 It is a perspective view of the utility model;

[0025] Figure 5 It is a perspective view of the utility model; Figure 4 It is an enlarged schematic view of the middle C;

[0026] Figure 6 It is a top view of the utility model;

[0027] Figure 7 It is a top view of the utility model; Figure 6 It is a sectional view of the middle A-A.

[0028] In the drawing: 1, cover body; 2, conical concave part; 3, conical convex part; 4, flange part; 5, contact part; 6, rough part; 7, deformation seam. DETAILED DESCRIPTION

[0029] The utility model will be described in detail in combination with the drawings and examples.

[0030] As Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown in the drawings, the battery end cover comprises a cover body 1 formed in an integral structure by an integral pressing process using copper, iron or nickel metal materials, and the edge of the cover body 1 is formed with deformation seams 7 and a hemispherical convex structure between the two deformation seams 7 by an integral stamping process. In this embodiment, the deformation seams 7 are even in number, and adjacent two deformation seams 7 form a group, and each group of deformation seams 7 is distributed in a circumferential array. Then, a flange portion 4 is formed by a secondary stamping forming process, and the outer surface of the cover body 1 at the center is recessed to form a tapered recess 2 towards the inner cavity of the cover body 1. A tapered convex portion 3 is formed on one side of the inner cavity of the cover body 1 for abutting with the end portion of the current collector, so that the end portion of the current collector can abut when the battery end cover is assembled with the current collector. The edge of the cover body 1 is cold-pressed to form a flange portion 4 towards the plane direction of the tapered recess 2, and the flange portion 4 is formed with a plurality of abutting portions 5 which can be independently folded for abutting with the sealing ring.

[0031] As shown in the drawings, Figure 2 , Figure 4 and Figure 5 , the outer surface of the abutting portion 5 is formed with a rough portion 6 for increasing the friction between the abutting portion 5 and the sealing ring. In this embodiment, the rough portion 6 is formed in one step with the arc-shaped recess during the first stamping process, and the arc-shaped recess is arranged on the side of the flange portion 4 towards the tapered recess 2. The rough portion 6 is in a hemispherical convex structure, and the arc-shaped recess and the hemispherical convex structure of the rough portion 6 are arranged with the same center, and the arc-shaped convex surface of the rough portion 6 is arranged to face away from the tapered recess 2.

[0032] As shown in the drawings, Figure 3 and Figure 7 , the depth of the tapered recess 2 and the tapered convex portion 3 gradually increases from the periphery of the cover body 1 to the center, and the maximum depth of the tapered recess 2 or the tapered convex portion 3 is 1-1.5 cm. By arranging the tapered recess 2 and the tapered convex portion 3 with a size of 1-1.5 cm, the connection of the battery end cover to the current collector is improved while the flatness of the surface of the battery end cover is basically ensured, and the battery end cover also plays a good guiding role for the battery string.

[0033] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A battery end cap characterized by: The utility model relates to a cover (1) of integral structure, the outer surface of the cover (1) is recessed to form a taper recess (2) in the inner cavity of the cover (1), the side of the inner cavity of the cover (1) is formed with a taper convex (3) for abutting with the end of the current collector, the edge of the cover (1) is cold-pressed to form a flange (4) towards the plane direction of the taper recess (2), and a plurality of abutting parts (5) for abutting with the sealing ring are formed on the flange (4).

2. The battery end cap of claim 1, wherein: The outer surface of the abutting part (5) is formed with a rough part (6) for increasing the friction with the sealing ring.

3. The battery end cap of claim 2, wherein: An even number of deformation seams (7) are formed on the flange (4).

4. The battery end cap of claim 2, wherein: The rough part (6) is in a hemispherical convex structure, and the arc convex surface of the rough part (6) is arranged away from the taper recess (2).

5. The battery end cap of claim 4, wherein: The flange (4) is formed with an arc recess on the side towards the taper recess (2), and the arc recess and the hemispherical convex structure of the rough part (6) are arranged with the same center.

6. The battery end cap of claim 5, wherein: The depth of the taper recess (2) and the taper convex (3) gradually increases from the periphery to the center of the cover (1), and the maximum depth of the taper recess (2) or the taper convex (3) is 1-1.5 cm.

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