A battery electrode sealing assembly and a battery

Abstract

This utility model discloses a battery electrode sealing assembly, including a metal ring, a ceramic sealing ring, and an electrode post. The outer wall of the electrode post has an annular support portion. A ceramic insulating ring extends downward from the inner side of the ceramic sealing ring, and the ceramic insulating ring is fitted over the electrode post. The metal ring is fitted over the ceramic insulating ring. The upper surface of the ceramic sealing ring forms a sealing connection with the lower surface of the support portion, and the lower surface of the ceramic sealing ring forms a sealing connection with the upper surface of the metal ring. Its advantages are: the ceramic insulating ring, fitted over the electrode post, isolates the metal ring from the electrode post, providing insulation; simultaneously, the sealing connection between the upper surface of the ceramic sealing ring and the lower surface of the support portion facilitates welding and increases the sealing area between the ceramic sealing ring and the support portion; and the sealing connection between the lower surface of the ceramic sealing ring and the upper surface of the metal ring facilitates welding.

Description

Technical Field

[0001] This utility model relates to the field of battery sealing technology, and in particular to a battery electrode sealing assembly and a battery. Background Technology

[0002] Currently, battery electrodes are sealed to the cover plate via a plastic sealing structure, achieving a good sealing effect. However, as the battery temperature rises, the plastic sealing structure melts, resulting in poor sealing. To address the issue of high-temperature melting of the plastic sealing structure, application number CN201110210496.1 discloses a cylindrical lithium-ion power battery, including a cylindrical shell, a positive electrode cover plate, a negative electrode cover plate, a positive electrode post, a negative electrode post, a central tube, and a battery cell. The negative electrode cover plate has a through hole, within which a negative electrode ceramic ring is sealed and welded. The negative electrode post passes through the central hole of the negative electrode ceramic ring and is sealed and welded to it. The positive electrode post is sealed and welded to the inner wall of the central hole of the positive electrode ceramic ring, and the negative electrode post is also sealed and welded to the inner wall of the central hole of the negative electrode ceramic ring. Welding the positive electrode post to the inner wall of the central hole of the positive electrode ceramic ring and the negative electrode post to the inner wall of the central hole of the negative electrode ceramic ring is inconvenient, making the welding process difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery electrode sealing assembly and a battery, which addresses the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] A battery electrode sealing assembly includes a metal ring, a ceramic sealing ring, and an electrode post. The outer wall of the electrode post is provided with an annular support portion. A ceramic insulating ring extends downward from the inner side of the ceramic sealing ring. The ceramic insulating ring is sleeved on the outside of the electrode post. The metal ring is sleeved on the outside of the ceramic insulating ring. The upper surface of the ceramic sealing ring forms a sealing connection with the lower surface of the support portion, and the lower surface of the ceramic sealing ring forms a sealing connection with the upper surface of the metal ring.

[0006] A preferred embodiment is that the lower side of the outer wall of the metal ring is provided with a stepped surface.

[0007] In a preferred embodiment, the upper surface of the ceramic sealing ring and the lower surface of the support are connected in a sealed manner by a brazing layer, and the lower surface of the ceramic sealing ring and the upper surface of the metal ring are connected in a sealed manner by a brazing layer.

[0008] In a preferred embodiment, both the upper and lower surfaces of the ceramic sealing ring are metallized to form a metal layer that is co-fired integrally with the ceramic sealing ring.

[0009] Another technical solution of this utility model is:

[0010] A battery includes a cover plate, a housing, and a battery electrode sealing assembly. The top of the housing is connected to the edge of the cover plate, and the cover plate has a mounting hole at its center. The battery electrode sealing assembly is sealed and installed in the mounting hole. The battery electrode sealing assembly is the battery electrode sealing assembly described above.

[0011] The battery electrode sealing assembly and battery provided in this embodiment of the utility model have at least the following beneficial effects: A ceramic insulating ring is sleeved outside the electrode post to isolate the metal ring from the electrode post, thus providing insulation; simultaneously, the upper surface of the ceramic sealing ring forms a sealed connection with the lower surface of the support, which is convenient for welding and also increases the sealing area between the ceramic sealing ring and the support. The ceramic sealing ring and the ceramic insulating ring limit the horizontal movement of the electrode post, preventing displacement during vibration. The sealing effect between the upper surface of the ceramic sealing ring and the lower surface of the support is good. The sealing effect between the lower surface of the ceramic sealing ring and the upper surface of the metal ring is good.

[0012] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the battery electrode sealing assembly in this utility model;

[0014] Figure 2 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 1 ;

[0015] Figure 3 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 2 ;

[0016] Figure 4 yes Figure 1 Exploded view;

[0017] Figure 5 This is a cross-sectional view of the battery in this utility model. Detailed Implementation

[0018] To illustrate the ideas and objectives of this application, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," "left," "right," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] like Figures 1 to 4 As shown, a battery electrode sealing assembly includes a metal ring 10, a ceramic sealing ring 20, and an electrode post 30. The outer wall of the electrode post 30 is provided with an annular support portion 31. A ceramic insulating ring 21 extends downward from the inner side of the ceramic sealing ring 20. The ceramic insulating ring 21 is sleeved on the outside of the electrode post 30. The metal ring 10 is sleeved on the outside of the ceramic insulating ring 21. The upper surface of the ceramic sealing ring 20 forms a sealing connection with the lower surface of the support portion 31, and the lower surface of the ceramic sealing ring 20 forms a sealing connection with the upper surface of the metal ring 10.

[0022] like Figures 1 to 4 As shown, the ceramic sealing ring 20 and the ceramic insulating ring 21 are an integral structure. The ceramic insulating ring 21 is sleeved on the outside of the pole post 30 to isolate the metal ring 10 from the pole post 30, thus providing insulation. Simultaneously, the upper surface of the ceramic sealing ring 20 forms a sealed connection with the lower surface of the support part 31, increasing the sealing area between the ceramic sealing ring 20 and the support part 31. The ceramic sealing ring 20 and the ceramic insulating ring 21 limit the horizontal movement of the pole post 30, preventing displacement during vibration. The sealing effect between the upper surface of the ceramic sealing ring 20 and the lower surface of the support part 31 is good.

[0023] like Figures 1 to 4 As shown, the lower surface of the ceramic sealing ring 20 forms a sealing connection with the upper surface of the metal ring 10, increasing the sealing area between the ceramic sealing ring 20 and the metal ring 10. The sealing effect between the ceramic sealing ring 20 and the metal ring 10 is good.

[0024] like Figures 1 to 4 As shown, the lower side of the outer wall of the metal ring 10 is provided with a stepped surface.

[0025] like Figures 1 to 4 As shown, the upper surface of the ceramic sealing ring 20 and the lower surface of the support 31 are connected in a sealed manner by a brazing layer 40, and the lower surface of the ceramic sealing ring 20 and the upper surface of the metal ring 10 are connected in a sealed manner by a brazing layer 40.

[0026] like Figures 1 to 4 As shown, the upper surface of the ceramic sealing ring 20 is coated with a brazing layer 40, and the lower surface of the support part 31 is attached to the upper surface of the ceramic sealing ring 20, so as to facilitate the sealing and fixing of the upper surface of the ceramic sealing ring 20 and the lower surface of the support part 31.

[0027] like Figures 1 to 4 As shown, the lower surface of the ceramic sealing ring 20 is coated with a brazing layer 40, and the upper surface of the metal ring 10 is attached to the upper surface of the ceramic sealing ring 20. This facilitates the sealing and fixation of the lower surface of the ceramic sealing ring 20 with the upper surface of the support portion 31.

[0028] like Figures 1 to 4 As shown, the upper and lower surfaces of the ceramic sealing ring 20 are both metallized to form a metal layer 50 that is co-fired with the ceramic sealing ring 20.

[0029] like Figures 1 to 4 As shown, the upper and lower surfaces of the ceramic sealing ring 20 are fixed to the brazing layer 40 by the metal layer 50, making the fixation more secure.

[0030] like Figures 1 to 5 As shown, a battery includes a cover plate 60, a housing 70, and a battery electrode sealing assembly. The top of the housing 70 is connected to the edge of the cover plate 60. The cover plate 60 has a mounting hole at its center, and the battery electrode sealing assembly is sealed and installed in the mounting hole. The battery electrode sealing assembly is the battery electrode sealing assembly described above. A metal ring 10 and a terminal post 30 are sealed and welded together by a ceramic sealing ring 20 to form the battery electrode sealing assembly. The battery electrode sealing assembly is welded to the cover plate 60 by the metal ring 10.

[0031] The above are specific embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A battery electrode seal assembly, characterized by, include: The device comprises a metal ring, a ceramic sealing ring, and an electrode post. The outer wall of the electrode post is provided with an annular support portion. A ceramic insulating ring extends downward from the inner side of the ceramic sealing ring. The ceramic insulating ring is sleeved on the outside of the electrode post. The metal ring is sleeved on the outside of the ceramic insulating ring. The upper surface of the ceramic sealing ring forms a sealing connection with the lower surface of the support portion, and the lower surface of the ceramic sealing ring forms a sealing connection with the upper surface of the metal ring.

2. The battery electrode seal assembly of claim 1, wherein, The lower side of the outer wall of the metal ring is provided with a stepped surface.

3. The battery electrode seal assembly of claim 1, wherein, The upper surface of the ceramic sealing ring and the lower surface of the support are connected in a sealed manner through a brazing layer, and the lower surface of the ceramic sealing ring and the upper surface of the metal ring are connected in a sealed manner through a brazing layer.

4. The battery electrode seal assembly of claim 3, wherein, The upper and lower surfaces of the ceramic sealing ring are both metallized to form a metal layer that is co-fired with the ceramic sealing ring.

5. A battery comprising a cover plate, a housing, and a battery electrode sealing assembly, wherein the top of the housing is connected to the edge of the cover plate, the cover plate has a mounting hole at its center, and the battery electrode sealing assembly is sealed and installed in the mounting hole, wherein the battery electrode sealing assembly is the battery electrode sealing assembly according to any one of claims 1 to 4.

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