Battery cell cover plate and battery cell

Abstract

The utility model relates to the technical field of cylindrical batteries, in particular to a battery cell cover plate and a battery cell. The utility model provides a battery cell cover plate which comprises an upper plastic and a lower plastic, the lower plastic is connected with an explosion-proof valve, a pole is arranged between the upper plastic and the lower plastic, and a polished aluminum sheet is sleeved outside the pole in a sealing manner; a first groove is formed in the side, facing the upper plastic, of the light aluminum sheet, and a ceramic support matched with the first groove is arranged between the light aluminum sheet and the upper plastic. The projection of the upper plastic on the plane where the light aluminum sheet is located can cover the part of the projection of the ceramic support on the plane where the light aluminum sheet is located so that the upper plastic can press the ceramic support in the first groove, a riveting block is arranged on the side, back to the lower plastic, of the upper plastic, and the riveting block is connected with the pole in a riveting mode. The utility model provides a battery cell cover plate and a battery cell, which can improve the stability of the battery cell cover plate and the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to cylindrical battery technical field, concretely relates to a battery cell cover plate and battery cell. BACKGROUND

[0002] At present, the domestic battery cell pole structure is mostly riveting form, that is, the pole is fixed by using riveting pole and making the pole deform, in the riveting process, the cover plate may be bent and deformed, and in the transportation process, the cover plate may also be deformed due to poor packaging and stress. UTILITY MODEL CONTENTS

[0003] In view of the technical problem that the cover plate deformation not only affects the stability of the explosion valve opening pressure but also affects the yield of shell cover welding in the prior art, the utility model provides a battery cell cover plate and battery cell, and the stability of the battery cell cover plate and battery cell is improved.

[0004] The utility model provides a battery cell cover plate, including upper plastic and lower plastic, the lower plastic is connected with the explosion valve, the upper plastic and lower plastic are provided with the pole between, the outer sealing sleeve of pole is equipped with the aluminum sheet, the aluminum sheet is equipped with the first recess on the side to the upper plastic, the aluminum sheet is provided with the ceramic support of adaptation with the first recess between the upper plastic, the projection of upper plastic in the plane of aluminum sheet can cover the part of the projection of ceramic support in the plane of aluminum sheet, so that the upper plastic can press the ceramic support in the first recess, the riveting block is provided on the side of upper plastic to the lower plastic, and the riveting block is riveted with the pole.

[0005] Further, the pole includes a bottom plate and a pole body, the axial direction of the pole body is perpendicular to the bottom plate, the lower part of the bottom plate is fixedly connected with the lower plastic, and the pole body is sleeved in the aluminum sheet and the upper plastic.

[0006] Further, a sealing ring is arranged between the aluminum sheet and the bottom plate, and the sealing ring is sleeved outside the pole body.

[0007] Further, the ceramic support includes a support body and a support connecting body, the projection of the support body in the plane of the aluminum sheet is a regular polygon frame, one end of the support connecting body is fixed with the support body, and the other end of the support connecting body extends towards the inside of the support body, and the projection of the upper plastic in the plane of the aluminum sheet can cover part of the projection of the support connecting body in the plane of the aluminum sheet.

[0008] The projection of the support body in the plane of the aluminum sheet is a regular hexagon frame.

[0009] The end of the upper plastic away from the lower plastic is provided with a second recess matched with the riveting block.

[0010] The ceramic support and the aluminum sheet are connected by brazing.

[0011] The utility model provides still a battery core including the battery core cover plate.

[0012] The utility model discloses the beneficial effect lies in:

[0013] The first recess is arranged in the aluminum sheet, and the ceramic support is added, because the ceramic has very high hardness and great brittleness, it is difficult to produce plastic deformation when the external force impact is received, and the ceramic has good stability and high temperature resistance, and the light aluminum sheet is prevented from deforming by using the properties.

[0014] Through the design that the support main body cooperates with the support connecting body, the range of the ceramic main body and the ceramic support is larger, the stability of the light aluminum sheet and the ceramic support whole can be increased to a greater extent, the structure of the light aluminum sheet and the ceramic support whole can resist greater force impact, the support connecting body is connected with the upper plastic, the upper plastic presses the whole ceramic support in the first recess, and the stability of the connection of the ceramic support and the light aluminum sheet is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0016] Figure 1 It is a structure schematic view of one embodiment of the battery core cover plate of the utility model;

[0017] Figure 2 It is an explosion view of one embodiment of the battery core cover plate of the utility model.

[0018] Figure 3 It is a sectional view of one embodiment of the battery core cover plate of the utility model.

[0019] Main drawing mark explanation: 1-upper plastic, 12-second recess, 2-lower plastic, 31-pole main body, 32-bottom plate, 4-light aluminum sheet, 41-first recess, 51-support main body, 52-support connecting body, 6-riveting block, 7-explosion-proof valve. DETAILED DESCRIPTION

[0020] In order to make the person skilled in the art better understand the technical scheme in the present application, the technical scheme in the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0021] As shown in Figure 1 , Figure 2 and Figure 3 , one embodiment of the present application provides a battery cell cover plate, comprising an upper plastic 1 and a lower plastic 2, the lower plastic 2 is connected with an explosion-proof valve 7, an electrode post is arranged between the upper plastic 1 and the lower plastic 2, the electrode post comprises a bottom plate 32 and a cylindrical electrode post body 31, the axial direction of the electrode post body 31 is perpendicular to the bottom plate 32, the lower part of the bottom plate 32 is fixedly connected with the lower plastic 2, the upper plastic 1 is provided with a through hole for the electrode post body to pass through, an aluminum sheet 4 is arranged outside the electrode post, the aluminum sheet 4 is arranged between the upper plastic 1 and the lower plastic 2, a through hole is formed in the middle of the aluminum sheet 4 for the electrode post body 31 to pass through, the electrode post body 31 is sealingly connected with the aluminum sheet 4, a rubber sealing ring is connected with the outer sealing sleeve of the electrode post body 31, the outer side of the rubber sealing ring is sealingly connected with the through hole formed in the middle of the aluminum sheet 4, and the rubber sealing ring is in interference fit with the electrode post body 31 and the aluminum sheet 4 to maintain the sealing state between the electrode post body 31 and the aluminum sheet 4.

[0022] A first groove 41 is formed in the side of the aluminum sheet 4 facing the upper plastic 1, a ceramic support matched with the first groove 41 is arranged between the aluminum sheet 4 and the upper plastic 1, the ceramic support is placed in the first groove 41, the ceramic support is brazingly connected with the aluminum sheet 4, and the upper plastic 1 presses the ceramic support to prevent the ceramic support from falling out. The first groove 41 is formed in the aluminum sheet 4 and the ceramic support is added, since the ceramic has very high hardness and great brittleness, it is difficult to produce plastic deformation when subjected to external force impact, and the ceramic has good stability and high temperature resistance, so the aluminum sheet 4 is prevented from deforming by utilizing such properties.

[0023] The ceramic support comprises a support body 51 and a support connecting body 52, the projection of the support body 51 on the plane where the aluminum sheet 4 is located is a regular polygon frame, one end of the support connecting body 52 is fixed with the support body 51, the other end of the support connecting body 52 extends towards the inside of the support body 51, and the projection of the upper plastic 1 on the plane where the aluminum sheet 4 is located can cover part of the projection of the support connecting body 52 on the plane where the aluminum sheet 4 is located. The projection of the upper plastic 1 on the plane where the aluminum sheet 4 is located can cover part of the projection of the ceramic support on the plane where the aluminum sheet 4 is located, so that the upper plastic 1 can press the ceramic support into the first groove 41, the side of the upper plastic 1 away from the lower plastic 2 is provided with a riveting block 6, the riveting block 6 is riveted with the pole, the end of the upper plastic 1 away from the lower plastic 2 is provided with a second groove 12 matched with the riveting block 6, and the riveting block 6 is arranged in the second groove 12. Through the cooperation of the support body 51 and the support connecting body 52, the range where the ceramic body and the ceramic support are located is large, the stability of the aluminum sheet 4 and the whole ceramic support can be increased to a greater extent, the structure of the aluminum sheet 4 and the whole ceramic support can resist greater force impact, the support connecting body 52 is connected with the upper plastic 1, the upper plastic 1 presses the whole ceramic support in the first groove 41, and the stability of the connection between the ceramic support and the aluminum sheet 4 is improved. In a preferred embodiment, the projection of the support body 51 on the plane where the aluminum sheet 4 is located is a regular hexagon frame, one end of the support connecting body 52 is fixed with the side of the support body, and is arranged uniformly in the circumferential direction of the support body 51.

[0024] An embodiment of the utility model further provides a kind of electric core, including the electric core cover plate in above-mentioned embodiment, pole and other parts in electric core connection.

[0025] Although the utility model has been described in detail with reference to the drawings and in conjunction with preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the utility model, and these modifications or replacements should be within the scope of the utility model. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. An electrode cover plate, characterized by, The upper plastic and the lower plastic are connected with an explosion-proof valve, a pole is arranged between the upper plastic and the lower plastic, and an outer sealing sleeve of the pole is provided with an aluminum sheet; a first groove is formed in a side of the aluminum sheet facing the upper plastic, and a ceramic support matched with the first groove is arranged between the aluminum sheet and the upper plastic; A projection of the upper plastic on a plane of the aluminum sheet can cover a part of a projection of the ceramic support on the plane of the aluminum sheet, so that the upper plastic can press the ceramic support into the first groove, and a riveting block is arranged on a side of the upper plastic away from the lower plastic, and the riveting block is riveted with the pole.

2. An electrode cover plate as claimed in claim 1, wherein The pole comprises a bottom plate and a pole body, an axial direction of the pole body is perpendicular to the bottom plate, a lower part of the bottom plate is fixedly connected with the lower plastic, and the pole body is sleeved in the aluminum sheet and the upper plastic.

3. The cell cover plate of claim 1, wherein, A sealing ring is arranged between the aluminum sheet and the bottom plate, and the sealing ring is sleeved outside the pole body.

4. The cell cover plate of claim 1, wherein, The ceramic support comprises a support body and a support connecting body, a projection of the support body on the plane of the aluminum sheet is a regular polygon frame, one end of the support connecting body is fixed with the support body, and the other end of the support connecting body extends towards the support body, and a projection of the upper plastic on the plane of the aluminum sheet can cover a part of a projection of the support connecting body on the plane of the aluminum sheet.

5. An electrode cover plate as claimed in claim 4, wherein The projection of the support body on the plane of the aluminum sheet is a regular hexagon frame.

6. An electrode cover plate as defined in claim 1, wherein A second groove matched with the riveting block is arranged on an end of the upper plastic away from the lower plastic.

7. An electrode cover plate as defined in claim 1, wherein The ceramic support is brazed with the aluminum sheet.

8. An electric cell characterized by The battery cell cover plate comprises the battery cell cover plate according to any one of claims 1-7.

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