A stable, safe and convenient ceramic sealed battery electrode assembly

Abstract

The utility model discloses a kind of stable safe convenient ceramic sealed battery electrode assemblies, including upper cover and electrode column, electrode column outer periphery is equipped with support part, ceramic sealing ring is equipped between support part and upper cover, ceramic sealing ring lower surface and support part upper surface are sealed connection by sealing layer, ceramic sealing ring upper surface and upper cover lower surface are sealed connection by sealing layer, or ceramic sealing ring upper surface and support part lower surface are sealed connection by sealing layer, ceramic sealing ring lower surface and upper cover upper surface are sealed connection by sealing layer.Its advantage is that there is no cutting force between electrode column side wall and sealing layer, ceramic sealing ring lower surface and support part upper surface are compacted tightly, sealing effect is better, sealing is more stable;There is no cutting force between upper cover side wall and sealing layer, ceramic sealing ring upper surface and support part lower surface are compacted tightly, sealing effect is better, sealing is more stable.

Description

Technical Field

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

[0002] Application number CN201210032427.0 discloses a sealing assembly for a battery and its manufacturing method. The sealing assembly includes a metal ring, a ceramic ring, and a core. The metal ring has a mounting hole in its middle, and the ceramic ring has a connecting hole in its middle. The ceramic ring is installed in the mounting hole of the metal ring, and the core is installed in the connecting hole of the ceramic ring. The mating surface between the metal ring and the ceramic ring and / or the connecting surface between the ceramic ring and the core is at an angle of 1-45 degrees to the center line of the ceramic ring. A first brazing layer is provided between the outer surface of the ceramic ring and the mounting hole wall of the metal ring. The outer surface of the ceramic ring and the mounting hole wall of the metal ring are sealed and welded together through this first brazing layer. However, there is a vertical shear force between the mounting hole wall of the metal ring and the first brazing layer, resulting in poor sealing, a small contact area, and unstable sealing. Similarly, a second brazing layer is used to seal and weld the outer surface of the core post to the connecting hole wall of the ceramic ring. Again, there is a vertical shear force between the outer surface of the core post and the connecting hole wall of the ceramic ring, leading to poor sealing, a small contact area, and unstable sealing. Furthermore, it is inconvenient to coat the connecting hole wall of the ceramic ring with a second brazing layer, making the process more complex. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a stable, safe and convenient ceramic-sealed battery electrode assembly, 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 stable, safe, and convenient ceramic-sealed battery electrode assembly includes a top cover and an electrode post. A support portion is provided around the outer periphery of the electrode post. A ceramic sealing ring is provided between the support portion and the top cover. The ceramic sealing ring is sleeved on the outside of the electrode post. The lower surface of the ceramic sealing ring forms a sealed connection with the upper surface of the support portion through a sealing layer; the upper surface of the ceramic sealing ring forms a sealed connection with the lower surface of the top cover through a sealing layer; or the upper surface of the ceramic sealing ring forms a sealed connection with the lower surface of the support portion through a sealing layer; and the lower surface of the ceramic sealing ring forms a sealed connection with the upper surface of the top cover through a sealing layer. The angle between the sealing layer and the axis of the electrode post is 60 degrees to 120 degrees.

[0006] In a preferred embodiment, the sealing layer is formed as a brazing layer, and the lower surface of the ceramic sealing ring is welded and fixed to the upper surface of the support through the brazing layer, and the upper surface of the ceramic sealing ring is welded and fixed to the lower surface of the upper cover through the brazing layer, or the upper surface of the ceramic sealing ring is welded and fixed to the lower surface of the support through the brazing layer, and the lower surface of the ceramic sealing ring is welded and fixed to the upper surface of the upper cover through the brazing layer.

[0007] In a preferred embodiment, both the upper and lower surfaces of the ceramic sealing ring are metallized to form a metal layer that is fired together with the ceramic sealing ring.

[0008] A preferred embodiment is that the metal layer material is one or a mixture of copper, aluminum, nickel, molybdenum, and manganese.

[0009] A preferred embodiment is that the metal layer is formed by a mixture of ceramic and metallic materials.

[0010] In a preferred embodiment, the inner wall of the ceramic sealing ring extends upward or downward with a first insulating ring, which is sleeved on the outer wall of the electrode post and serves to isolate the upper cover from the electrode post.

[0011] In a preferred embodiment, the outer wall of the ceramic sealing ring extends upward or downward with a second insulating ring, which is used to isolate the top cover from the electrode post.

[0012] A preferred embodiment is that the angle between the sealing layer and the axis of the electrode post is 90 degrees.

[0013] The present invention provides a stable, safe, and convenient ceramic-sealed battery electrode assembly with at least the following advantages: there is no cutting force between the electrode post sidewall and the sealing layer; the lower surface of the ceramic sealing ring and the upper surface of the support are tightly pressed together, resulting in a good and stable sealing effect; there is no cutting force between the upper cover sidewall and the sealing layer; the upper surface of the ceramic sealing ring and the lower surface of the support are tightly pressed together, resulting in a good and stable sealing effect; the sealing layer is coated on the upper and lower surfaces of the ceramic sealing ring, which is convenient and simple to apply, and the sealing layer does not need to be coated on the inner ring surface of the ceramic sealing ring.

[0014] 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

[0015] Figure 1 This is a cross-sectional view of the present invention. Figure 1 ;

[0016] Figure 2 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 1 ;

[0017] Figure 3 This is a cross-sectional view of the present invention. Figure 2 ;

[0018] Figure 4 This is a cross-sectional view of the electrode post in this utility model. Figure 2 ;

[0019] Figure 5 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 2 ;

[0020] Figure 6 This is a cross-sectional view of the present invention. Figure 3 ;

[0021] Figure 7 This is a cross-sectional view of the present invention. Figure 4 ;

[0022] Figure 8 This is a cross-sectional view of the electrode post in this utility model. Figure 3 ;

[0023] Figure 9 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 3 ;

[0024] Figure 10 This is a cross-sectional view of the present invention. Figure 5 ;

[0025] Figure 11 This is a cross-sectional view of the present invention. Figure 6 ;

[0026] Figure 12 This is a cross-sectional view of the ceramic sealing ring in this utility model. Figure 4 . Detailed Implementation

[0027] To illustrate the ideas and objectives of this application, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 12 As shown, a ceramic sealing structure for a battery electrode post 2 includes an upper cover 1 and an electrode post 2 inserted into the upper cover 1. A support portion 3 is provided on the outer periphery of the electrode post 2. A ceramic sealing ring 4 is provided between the support portion 3 and the upper cover 1. The ceramic sealing ring 4 is sleeved on the outside of the electrode post 2. The lower surface of the ceramic sealing ring 4 is sealed to the upper surface of the support portion 3 through a sealing layer 5, and the upper surface of the ceramic sealing ring 4 is sealed to the lower surface of the upper cover 1 through a sealing layer 5. Alternatively, the upper surface of the ceramic sealing ring 4 is sealed to the lower surface of the support portion 3 through a sealing layer 5, and the lower surface of the ceramic sealing ring 4 is sealed to the upper surface of the upper cover 1 through a sealing layer 5. The angle between the sealing layer 5 and the axis of the electrode post is 60 degrees to 120 degrees.

[0031] In some embodiments, such as Figures 1 to 6 As shown, the lower surface of the ceramic sealing ring 4 and the upper surface of the support part 3 are connected by a sealing layer 5, and the upper surface of the ceramic sealing ring 4 and the lower surface of the upper cover 1 are connected by a sealing layer 5.

[0032] like Figures 1 to 6 As shown, since the lower surface of the ceramic sealing ring 4 is coated with a sealing layer 5 and the upper surface of the support part 3 is coated with a sealing layer 5, the lower surface of the ceramic sealing ring 4 and the upper surface of the support part 3 form a sealed connection through the sealing layer 5. There is no cutting force between the side wall of the electrode post 2 and the sealing layer 5, and the lower surface of the ceramic sealing ring 4 and the upper surface of the support part 3 are tightly compacted, resulting in a good sealing effect, stable sealing, and safety.

[0033] like Figures 1 to 6As shown, the sealing layer 5 is coated on the upper surface of the ceramic sealing ring 4, and the sealing layer 5 is also coated on the lower surface of the upper cover 1. The upper surface of the ceramic sealing ring 4 and the lower surface of the upper cover 1 are connected in a sealed manner through the sealing layer 5.

[0034] like Figures 1 to 6 As shown, since there is no cutting force between the side wall of the upper cover 1 and the sealing layer 5, the upper surface of the ceramic sealing ring 4 and the lower surface of the support 3 are compacted tightly, resulting in a better sealing effect and a more stable seal.

[0035] like Figures 1 to 6 As shown, the inner wall of the upper cover 1 is insulated from the outer wall of the electrode post 2. The angle between the sealing layer 5 and the axis of the electrode post 2 can be 60 degrees, 90 degrees, or 120 degrees.

[0036] like Figures 1 to 6 As shown, the sealing layer 5 is coated on the upper and lower surfaces of the ceramic sealing ring 4, which is convenient for coating and has a simple process. The sealing layer 5 does not need to be coated on the inner ring surface of the ceramic sealing ring 4, which facilitates the sealing assembly of the electrode post 2 and the ceramic sealing ring 4.

[0037] In some embodiments, such as Figures 7 to 12 As shown, the upper surface of the ceramic sealing ring 4 and the lower surface of the support part 3 are connected by a sealing layer 5, and the lower surface of the ceramic sealing ring 4 and the upper surface of the cover 1 are connected by a sealing layer 5.

[0038] like Figures 7 to 12 As shown, since the upper surface of the ceramic sealing ring 4 is coated with a sealing layer 5 and the lower surface of the support part 3 is coated with a sealing layer 5, the upper surface of the ceramic sealing ring 4 and the lower surface of the support part 3 form a sealed connection through the sealing layer 5. There is no cutting force between the side wall of the electrode post 2 and the sealing layer 5, and the upper surface of the ceramic sealing ring 4 and the lower surface of the support part 3 are tightly compacted, resulting in a good sealing effect and a relatively stable seal.

[0039] like Figures 7 to 12 As shown, since the sealing layer 5 is coated on the lower surface of the ceramic sealing ring 4 and the upper surface of the cover 1, the lower surface of the ceramic sealing ring 4 and the upper surface of the cover 1 form a sealed connection through the sealing layer 5. There is no cutting force between the side wall of the cover 1 and the sealing layer 5, and the lower surface of the ceramic sealing ring 4 and the upper surface of the cover 1 are compacted tightly, resulting in a good sealing effect and a stable seal.

[0040] like Figures 7 to 12 As shown, the sealing layer 5 is coated on the upper and lower surfaces of the ceramic sealing ring 4 for easy application, and the sealing layer 5 does not need to be coated on the inner ring surface of the ceramic sealing ring 4.

[0041] In some embodiments, such as Figures 1 to 12As shown, the sealing layer 5 is a brazing layer. The lower surface of the ceramic sealing ring 4 is welded and fixed to the upper surface of the support part 3 through the brazing layer, and the upper surface of the ceramic sealing ring 4 is welded and fixed to the lower surface of the upper cover 1 through the brazing layer.

[0042] like Figures 1 to 6 As shown, the lower and upper surfaces of the ceramic sealing ring 4 are coated with brazing layers. The lower surface of the ceramic sealing ring 4 is pressed against the upper surface of the support part 3 and then welded to secure it. The upper surface of the ceramic sealing ring 4 is pressed against the lower surface of the upper cover 1 and then welded to secure it. The contact area between the lower surface of the ceramic sealing ring 4 and the upper surface of the support part 3 is relatively large, resulting in a strong and stable weld and a good sealing effect. The contact area between the upper surface of the ceramic sealing ring 4 and the lower surface of the upper cover 1 is also relatively large, resulting in a strong and stable weld and a good sealing effect.

[0043] like Figures 1 to 6 As shown, there is no longitudinal shear force between the electrode post 2 and the brazing layer, and there is no longitudinal shear force between the side wall of the upper cover 1 and the brazing layer. The inner ring surface of the ceramic sealing ring 4 does not need to be coated with a brazing layer, which facilitates the sealing assembly of the electrode post 2 and the ceramic sealing ring 4.

[0044] In some embodiments, such as Figures 7 to 12 As shown, the upper surface of the ceramic sealing ring 4 is fixed to the lower surface of the support part 3 by brazing, and the lower surface of the ceramic sealing ring 4 is fixed to the upper surface of the cover 1 by brazing.

[0045] like Figures 7 to 12 As shown, the upper and lower surfaces of the ceramic sealing ring 4 are coated with brazing layers. The upper surface of the ceramic sealing ring 4 is pressed against the lower surface of the support part 3 and then welded to secure it. The lower surface of the ceramic sealing ring 4 is pressed against the upper surface of the upper cover 1 and then welded to secure it. The contact area between the upper surface of the ceramic sealing ring 4 and the upper surface of the support part 3 is relatively large, resulting in a strong and stable weld and a good sealing effect. The contact area between the lower surface of the ceramic sealing ring 4 and the upper surface of the upper cover 1 is also relatively large, resulting in a strong and stable weld and a good sealing effect.

[0046] like Figures 7 to 12 As shown, there is no longitudinal shear force between the electrode post 2 and the brazing layer, and there is no longitudinal shear force between the side wall of the upper cover 1 and the brazing layer. The inner ring surface of the ceramic sealing ring 4 does not need to be coated with a brazing layer.

[0047] In some embodiments, such as Figures 1 to 12 As shown, the upper and lower surfaces of the ceramic sealing ring 4 are both metallized to form a metal layer 6 that is co-fired with the ceramic sealing ring.

[0048] like Figures 1 to 12As shown, since the surface structure of the ceramic sealing ring 4 is different from that of the support part 3 and the upper cover 1, welding often cannot wet the surface of the ceramic sealing ring 4, nor can it interact with it to form a strong bond. First, a metal layer 6 is firmly adhered to the surface of the ceramic sealing ring 4, thereby realizing the welding between the ceramic sealing ring 4 and the support part 3 and the upper cover 1.

[0049] like Figures 1 to 12 As shown, the metal layer 6 is made of one or a mixture of copper, aluminum, nickel, molybdenum, and manganese.

[0050] like Figures 1 to 12 As shown, the ceramic sealing ring 4 is made of one or a mixture of several of the following materials: alumina, zirconium oxide, aluminum nitride, and silicon nitride.

[0051] In some embodiments, such as Figures 1 to 12 As shown, the metal layer 6 is formed by mixing ceramic and metal materials.

[0052] like Figures 1 to 12 As shown, the inner wall of the ceramic sealing ring 4 extends upward or downward with a first insulating ring 7. The first insulating ring 7 is sleeved on the outer wall of the electrode post 2 and is used to isolate the upper cover 1 from the electrode post 2.

[0053] like Figures 1 to 12 As shown, when the lower surface of the ceramic sealing ring 4 and the upper surface of the support 3 form a sealed connection through the sealing layer 5, and the upper surface of the ceramic sealing ring 4 and the lower surface of the upper cover 1 form a sealed connection through the sealing layer 5, a first insulating ring 7 extends upward from the inner wall of the ceramic sealing ring 4. The first insulating ring 7 is sleeved on the outer wall of the electrode post 2. The first insulating ring 7 is used to isolate the upper cover 1 from the electrode post 2.

[0054] like Figures 1 to 12 As shown, when the upper surface of the ceramic sealing ring 4 is welded and fixed to the lower surface of the support part 3 by a brazing layer, and the lower surface of the ceramic sealing ring 4 is welded and fixed to the upper surface of the upper cover 1 by a brazing layer, a first insulating ring 7 extends downward from the inner wall of the ceramic sealing ring 4. The first insulating ring 7 is sleeved on the outer wall of the electrode post 2. The first insulating ring 7 is used to isolate the upper cover 1 from the electrode post 2.

[0055] In some embodiments, such as Figures 1 to 12 As shown, the outer wall of the ceramic sealing ring 4 extends upward or downward with a second insulating ring 8, which is used to isolate the upper cover 1 from the electrode post 2.

[0056] like Figure 1 and Figure 2As shown, when the lower surface of the ceramic sealing ring 4 and the upper surface of the support part 3 form a sealed connection through the sealing layer 5, and the upper surface of the ceramic sealing ring 4 and the lower surface of the upper cover 1 form a sealed connection through the sealing layer 5, a second insulating ring 8 extends downward from the outer wall of the ceramic sealing ring 4. The second insulating ring 8 is sleeved on the outer wall of the support part 3. The second insulating ring 8 is used to isolate the upper cover 1 from the electrode post 2.

[0057] like Figure 11 and Figure 12 As shown, when the upper surface of the ceramic sealing ring 4 is fixed to the lower surface of the support part 3 by brazing, and the lower surface of the ceramic sealing ring 4 is fixed to the upper surface of the upper cover 1 by brazing, a second insulating ring 8 extends upward from the outer wall of the ceramic sealing ring 4. The second insulating ring 8 is sleeved on the outer wall of the electrode post 2. The second insulating ring 8 is used to isolate the upper cover 1 from the electrode post 2.

[0058] 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 stable, safe, and convenient ceramic-sealed battery electrode assembly, comprising a top cover and electrode posts, wherein a support portion is provided on the outer periphery of the electrode posts, characterized in that, A ceramic sealing ring is provided between the support and the top cover. The lower surface of the ceramic sealing ring is sealed to the upper surface of the support through a sealing layer, and the upper surface of the ceramic sealing ring is sealed to the lower surface of the top cover through a sealing layer. Alternatively, the upper surface of the ceramic sealing ring is sealed to the lower surface of the support through a sealing layer, and the lower surface of the ceramic sealing ring is sealed to the upper surface of the top cover through a sealing layer. The angle between the sealing layer and the axis of the electrode post is 60 degrees to 120 degrees.

2. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to claim 1, characterized in that, The sealing layer is a brazing layer. The lower surface of the ceramic sealing ring is welded and fixed to the upper surface of the support through the brazing layer, the upper surface of the ceramic sealing ring is welded and fixed to the lower surface of the upper cover through the brazing layer, or the upper surface of the ceramic sealing ring is welded and fixed to the lower surface of the support through the brazing layer, and the lower surface of the ceramic sealing ring is welded and fixed to the upper surface of the upper cover through the brazing layer.

3. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to claim 2, characterized in that, 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.

4. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to claim 3, characterized in that, The metal layer is formed by mixing ceramic and metal materials.

5. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to any one of claims 1 to 4, characterized in that, The inner wall of the ceramic sealing ring extends upward or downward with a first insulating ring, which is sleeved on the outer wall of the electrode post and is used to isolate the upper cover from the electrode post.

6. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to claim 5, characterized in that, The outer wall of the ceramic sealing ring extends upward or downward with a second insulating ring, which is used to isolate the top cover from the electrode post.

7. The stable, safe, and convenient ceramic-sealed battery electrode assembly according to claim 1, characterized in that, The angle between the sealing layer and the axis of the electrode post is 90 degrees.

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