Cathode cavity sealing component for sodium salt battery

Abstract

The utility model discloses a negative electrode cavity sealing part for a sodium salt battery, which comprises a sealing part body, the sealing part body is a square sealing part body with an opening at the top and a hollow inside, and a vacuum port is arranged at a position close to one side in the sealing part body. An open hole matched with the top of a solid electrolyte of the sodium salt battery is formed in the middle of the sealing part body, so that the sealing part body sleeves the top of the solid electrolyte of the sodium salt battery through the open hole, and the periphery of the sealing part body is connected with a shell of the sodium salt battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field especially relates to a negative pole cavity sealing component for sodium salt battery. BACKGROUND

[0002] The solid electrolyte diaphragm of sodium salt battery is designed into the structure that the pipe body is clover shape and the mouth part is square, and the battery external steel shell assembled with it is square structure, therefore a sealing component needs to be designed to seal with the outer nickel ring on the solid electrolyte ceramic assembly, and in order to make the cavity between the steel shell and the solid electrolyte diaphragm meet certain vacuum degree requirement, a vacuum port also needs to be designed on the sealing component, thereby meeting the working condition of sodium salt battery.

[0003] In view of the problems in the related art, the utility model provides a negative pole cavity sealing component for sodium salt battery. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of negative pole cavity sealing components for sodium salt battery, to solve the problems of prior art, such as the sealing component of sodium salt battery.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A negative pole cavity sealing component for sodium salt battery, including sealing component body, the sealing component body is the square sealing piece body of top opening and inside hollow, vacuum port is equipped in sealing component body inside near the position of one side, the opening is set in sealing piece body middle and is adapted to the opening of the solid electrolyte top of sodium salt battery, to make sealing component body pass through opening and be set in the solid electrolyte top of sodium salt battery, and sealing component body periphery is connected with sodium salt battery shell.

[0007] Further, the side top of the sealing piece body is provided with a tab fold edge adapted to the positive and negative electrodes of the sodium salt battery, so that the sealing piece body is connected with the positive and negative electrodes of the sodium salt battery through the tab fold edge.

[0008] Further, the opening in the middle of the sealing piece body is a circular opening, and the edge of the circular opening is upwardly convex.

[0009] Further, the vacuum port is a half-moon structure.

[0010] Further, the four corners of the square sealing piece body are R corners with smooth transitions.

[0011] Further, the R corner is R3.0-3.2mm.

[0012] Further, the sealing component body and the solid electrolyte top of the sodium salt battery are fixedly connected by welding.

[0013] Further, the sealing component body is connected with the sodium salt battery shell around through welding.

[0014] Further, the material of the sealing component body is steel material plated with nickel, stainless steel or pure nickel.

[0015] Further, the thickness of the steel material plated with nickel is 0.3-0.5 um.

[0016] Compared with the prior art, the negative electrode cavity sealing component for the sodium salt battery is formed by a plurality of stamping, punching and edge folding processes of a steel material plated with nickel, stainless steel or pure nickel material strip. The steel material can be plated with nickel first and then stamped, punched and edge folded, or can be stamped, punched and edge folded first and then plated with nickel. The sealing component is square outside and circular inside, has an R corner at the outer corner, and has a semicircular hole design between the edge and the middle circle, the material of the sealing component is steel material plated with nickel, stainless steel or pure nickel, the thickness of the nickel plating layer of the steel material is 3-5 um, as the sealing component of the negative electrode vacuum cavity of the sodium salt battery, the vacuum value of the cavity is ≤1000 Pa after welding with the steel shell mouth. The middle circular hole part of the sealing component is welded with the outer nickel ring on the solid electrolyte ceramic assembly, the periphery of the sealing component is welded with the steel shell, and finally the semilunar hole on the sealing component is vacuumized and then welded, so that the negative electrode cavity is in a vacuum sealed state. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structure diagram of a negative electrode cavity sealing component for a sodium salt battery provided by embodiment one;

[0018] Fig. 2 is a structure diagram of a solid electrolyte of a sodium salt battery provided by embodiment one;

[0019] Fig. 3 is a schematic view of welding of a sodium salt battery steel shell body and a sealing component body provided by embodiment one;

[0020] wherein, 1. sealing component body; 11. opening; 12. edge; 13. R corner; 14. tab edge; 15. vacuum port; 2. solid electrolyte of sodium salt battery; 3. sodium salt battery steel shell body; 31. welding. DETAILED DESCRIPTION

[0021] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0022] The purpose of this invention is to address the shortcomings of existing technologies by providing a sealing component for the negative electrode cavity of sodium salt batteries.

[0023] Example 1

[0024] This embodiment provides a sealing component for the negative electrode cavity of a sodium salt battery, such as... Figs. 1-3 As shown, it includes a sealing component body 1.

[0025] In this embodiment, the negative electrode cavity of the sodium salt battery includes a solid electrolyte 2 of the sodium salt battery and a sodium salt battery steel shell 3 fitted outside the solid electrolyte of the sodium salt battery; the solid electrolyte 2 of the sodium salt battery has a four-leaf clover shape with a central cylindrical tube and a square opening, and the sodium salt battery steel shell 3 has a square structure.

[0026] The sealing component body 1 is a cubic structure adapted to the solid electrolyte 2 of the sodium salt battery. The top of the cubic sealing component body 1 is open and the inside is hollow. A circular opening 11 is provided in the middle of the bottom of the sealing component body 1. The edge of the circular opening 11 is smoothly transitioned and protrudes upward, so that the sealing component body 1 forms a structure of square outside and circle inside. In this embodiment, the diameter of the circular opening 11 and the height of the upward protrusion of the circular opening 11 are adapted to the cylindrical outer nickel ring in the middle of the solid electrolyte 2 of the sodium salt battery. Thus, the sealing component body 1 can be sleeved on the outer cylindrical outer nickel ring in the middle of the solid electrolyte 2 of the sodium salt battery through the circular opening 11, and fixedly connected by welding, so that the outer surfaces of the sealing component body 1 and the solid electrolyte 2 of the sodium salt battery are at the same level after welding.

[0027] The sealing component body 1 has four vertical plate structures on its four sides 12. Each pair of adjacent vertical plate structures is connected by a rounded corner 13, meaning that this application has four corner structures 13, and each corner is R3.0 to 3.2 mm. In this embodiment, the sealing component body 1 has a sodium salt battery steel shell 3 encased on its four sides 12, and the sealing component body 1 has its four sides 12 fixedly connected to the sodium salt battery steel shell 3 by welding 31.

[0028] One of the vertical plate top of the four peripheral edges 12 of the sealing component body 1 is also provided with a tab flange 14 matched with the positive and negative poles of the sodium salt battery, so that the sealing component body 1 is connected with the positive and negative poles of the sodium salt battery through the tab flange 14.

[0029] The vacuum port 15 is provided between the circular opening 11 and one of the vertical plates of the four peripheral edges 12 near one side of the bottom of the sealing component body 1, and has a half-moon structure with an opening on one side of the half-moon structure. When the sealing component body 1 needs to be welded with the negative pole cavity of the sodium salt battery, the internal air is extracted to below 1000 Pa, so as to realize the welding of the sealing component body 1 and the negative pole cavity.

[0030] The main body material of the sealing component body 1 is made of steel material plated with nickel, stainless steel or pure nickel through multiple stamping, punching and flanging processes, wherein the thickness of the steel material plated with nickel layer is 0.3-0.5 um.

[0031] The sealing component body is made of steel material plated with nickel, stainless steel or pure nickel material strip through multiple stamping, punching and flanging processes. The steel material can be plated with nickel first and then stamped, punched and flanged, or stamped, punched and flanged first and then plated with nickel. The sealing component has an outer square and an inner circle, and the outer corner has an R angle. The plane between the edge and the middle circle has a semicircular opening design. The material of the sealing component is steel material plated with nickel, stainless steel or pure nickel, and the thickness of the steel material plated with nickel layer is 3-5 um. The sealing component is used as the sealing component of the negative vacuum cavity of the sodium salt battery, and the vacuum value of the cavity is required to be ≤1000 Pa after being welded with the steel shell. The middle circular hole part of the sealing component is welded with the outer nickel ring on the solid electrolyte ceramic assembly, the periphery of the sealing component is welded with the steel shell, and finally the sealing component is welded after being vacuumized at the semicircular opening of the sealing component, so that the negative pole cavity is in a vacuum sealed state.

[0032] It should be noted that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A negative electrode cavity sealing member for a sodium salt battery, characterized by, The sealing part body is a square sealing body with an open top and a hollow interior, a vacuum port is arranged in the sealing part body near one side, a hole is arranged in the middle of the sealing body and is adapted to the top of the solid electrolyte of the sodium salt battery, so that the sealing part body is sleeved on the top of the solid electrolyte of the sodium salt battery through the hole, and the sealing part body is connected with the shell of the sodium salt battery around.

2. A negative cavity seal member for a sodium battery according to claim 1, wherein A tab flange adapted to the positive and negative electrodes of the sodium salt battery is arranged on the top of one side of the sealing body, so that the sealing body is connected with the positive and negative electrodes of the sodium salt battery through the tab flange.

3. A negative cavity seal member for a sodium battery according to claim 2, wherein The hole in the middle of the sealing body is a circular hole, and the edge of the circular hole is upwardly convex.

4. The negative cavity seal member for a sodium battery of claim 1, wherein, The vacuum port is a half-moon structure.

5. The negative cavity seal member for a sodium battery of claim 1, wherein, The four corners of the square sealing body are R corners with smooth transitions.

6. A negative cavity seal member for a sodium battery according to claim 5, wherein The R corner is R3.0-3.2mm.

7. A negative cavity seal member for a sodium battery as defined in claim 1, wherein The sealing part body and the top of the solid electrolyte of the sodium salt battery are fixedly connected through welding.

8. The negative cavity seal member for a sodium battery of claim 1, wherein, The sealing part body and the shell of the sodium salt battery are fixedly connected through welding around the sealing part body.

9. The negative cavity seal member for a sodium battery of claim 1, wherein, The material of the sealing part body is steel nickel-plated, stainless steel or pure nickel.

10. A negative cavity seal member for a sodium battery according to claim 9, wherein The thickness of the steel nickel-plated is 0.3-0.5um.

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