CN-224226914-U - Glass sealing tool for sodium-nickel battery

Abstract

The utility model discloses a glass sealing tool for a sodium-nickel battery, which belongs to the technical field of sodium-nickel battery preparation, and comprises a tool substrate and a sealing limiting mechanism, wherein the sealing limiting mechanism comprises an isolation gasket and a limiting rod, in the sealing process, the ceramic tube and a hot-press sealing assembly can be fixed and limited through the isolation gasket and the limiting rod which are in relative fixed states, so that the relative displacement between the ceramic tube and the hot-press sealing assembly is avoided, the glass sealing effect is ensured, meanwhile, the ceramic tube is supported by the limiting rod, the ceramic tube can be prevented from being toppled, and the sealing tool adopting the structure not only can overcome the problems existing in the prior art, improves the sealing effect and quality, but also can improve the safety of the sealing process, and has certain practical value and market popularization value.

Inventors

• WANG HAO
• YU ZHENJIANG
• GUO KUANHONG
• LI WEIWEI
• ZHANG YINING

Assignees

• 浙江安力能源有限公司

Dates

Publication Date

20260512

Application Date

20250310

Claims (9)

1. 1. The glass sealing tool for the sodium-nickel battery is characterized by comprising a tool substrate, wherein the upper surface of the tool substrate is of a planar structure, a plurality of groups of sealing limiting mechanisms are distributed on the tool substrate at equal intervals, each sealing limiting mechanism comprises an isolation gasket and a limiting rod, each isolation gasket is used for supporting a hot-press sealing assembly, each limiting rod and each isolation gasket are coaxially arranged and vertically extend, the rod diameter of each limiting rod is smaller than the inner diameter of each isolation gasket and used for limiting a ceramic tube sleeved on each isolation gasket, and the ceramic tube is ensured to be in butt joint with the corresponding hot-press sealing assembly placed on each isolation gasket.
2. 2. The glass sealing tool for the sodium-nickel battery according to claim 1, wherein the sealing limiting mechanism is fixed on the tool substrate through a mounting piece, the mounting piece is a sleeve pipe fitting for connecting the tool substrate and the sealing limiting mechanism, or the mounting piece is a plug connector arranged on the tool substrate.
3. 3. The glass sealing tool for the sodium-nickel battery, which is disclosed in claim 2, is characterized in that one end of the sleeve pipe fitting is fixed on the tool substrate, the other end of the sleeve pipe fitting is connected with the isolation gasket in a plugging or screwing mode, the plug connector comprises a blind hole formed in the tool substrate and a clamping groove annularly arranged on the periphery of the blind hole, the size of the blind hole is matched with the limit rod, and the size of the clamping groove is matched with the isolation gasket.
4. 4. The glass sealing tool for sodium-nickel batteries of claim 3, wherein the blind holes are columnar holes, and the outer edges of the blind holes and the clamping grooves are respectively chamfered.
5. 5. The glass sealing tool for sodium-nickel batteries of claim 3, wherein the upper end face of the isolation gasket is higher than the upper surface of the tool substrate after the isolation gasket is arranged in the clamping groove.
6. 6. The glass sealing tool for the sodium-nickel battery according to claim 1, wherein the isolation gasket is of a hollow circular ring structure, the size of a hollow cavity of the circular ring structure is larger than the rod diameter of the limiting rod, a radially extending convex edge is arranged in the hollow cavity, a limiting groove is formed between the convex edge and the inner wall of the upper end of the hollow cavity, and the hot press sealing assembly can be clamped into the limiting groove.
7. 7. The glass sealing tool for the sodium-nickel battery according to claim 1, wherein the bottom surfaces of the two ends of the limiting rod are subjected to fillet treatment.
8. 8. The glass sealing tool for the sodium-nickel battery according to claim 1, wherein the height of the limiting rod is more than or equal to 1/3 of the height of the ceramic tube.
9. 9. The glass sealing tool for the sodium-nickel battery according to claim 1, wherein the tool substrate and the sealing limiting mechanism are made of inorganic nonmetallic materials or composite materials with high hardness, high wear resistance, high temperature resistance and chemical stability.

Description

Glass sealing tool for sodium-nickel battery Technical Field The utility model belongs to the technical field of sodium-nickel battery preparation, and particularly relates to a glass sealing tool for a sodium-nickel battery. Background The sodium-nickel battery, also called sodium salt battery or sodium-nickel chloride battery, is a kind of high temperature sodium battery, its positive pole is solid NiCl 2, the negative pole is liquid Na, electrolyte is solid beta' -Al 2O3 ceramic, sodium ion drifts between positive and negative electrodes through ceramic electrolyte during charge and discharge, it is a kind of green product with strong stability, high safety, long service life, wide application range, raw materials easy to obtain and nontoxic, recovery process simple and pollution-free. The glass sealed beta ' -Al 2O3 ceramic is the core part of the whole sodium-nickel battery, and mainly consists of two parts, namely (1) a beta ' -Al 2O3 ceramic tube and (2) a hot-press sealing assembly (TCB), wherein the ceramic tube is used as an electrolyte diaphragm between the positive electrode and the negative electrode of the battery and is a container of a melt, the TCB is mainly used for sealing the beta ' -Al 2O3 ceramic tube and is used as a key passage for conducting the positive electrode and the negative electrode in the whole battery, the TCB is mainly composed of an alpha-ceramic ring and an inner nickel ring, the alpha-ceramic ring is generally metallized, and then the inner nickel ring and the outer nickel ring are firmly attached to the fixed position of the ceramic ring by adopting a hot-press sealing process to form a complete TCB. Because nickel rings are extremely easy to oxidize at high temperature, inert gas is required to be introduced for protection in the heating process, and meanwhile, the working space is required to be as small as possible to ensure the stability and purity of gas, so that sintering kilns with small space and continuous production such as roller kilns or pusher kilns are generally adopted. In the whole glass sealing process, vibration can be generated when a push plate moves, a certain impulse is generated in the pushing process, relative displacement is easily generated between a ceramic tube and a TCB, if gaps are generated, the ceramic tube cannot be tightly connected by glass paste, and even the ceramic tube collapses to cause a furnace blockage, so that the glass sealing tool for the sodium-nickel battery with the novel structure is designed aiming at the process risk. Disclosure of utility model The utility model aims to provide a glass sealing tool for a sodium-nickel battery, which aims to solve the problems that a ceramic tube collapses and glass sealing between the ceramic tube and a TCB is not tight in the traditional glass sealing process. In order to solve the problems, the scheme provides a glass sealing tool for a sodium-nickel battery, which comprises a tool substrate, wherein the upper surface of the tool substrate is of a planar structure, a plurality of groups of sealing limiting mechanisms are distributed on the tool substrate at equal intervals, each sealing limiting mechanism comprises an isolation gasket and a limiting rod, each isolation gasket is used for supporting a hot-press sealing assembly, each limiting rod and each isolation gasket are coaxially arranged and vertically extend, and the rod diameter of each limiting rod is smaller than the inner diameter of each ceramic pipe so as to limit the ceramic pipe sleeved on the ceramic pipe and ensure that the ceramic pipe is in butt joint with the hot-press sealing assembly. The sealing limiting mechanism is fixed on the tooling substrate through a mounting piece, wherein the mounting piece is a sleeve pipe fitting for connecting the tooling substrate and the sealing limiting mechanism, or is an inserting piece arranged on the tooling substrate. The sleeve pipe fitting is characterized in that one end of the sleeve pipe fitting is fixed on the tool substrate, the other end of the sleeve pipe fitting is connected with the isolation gasket in a plugging or screwing mode, the plug connector comprises a blind hole formed in the tool substrate and a clamping groove arranged on the periphery of the blind hole in a surrounding mode, the size of the blind hole is matched with that of the limiting rod, and the size of the clamping groove is matched with that of the isolation gasket. As the preferable scheme of the application, the blind holes are columnar holes, and the outer edges of the blind holes and the clamping grooves are respectively subjected to chamfering treatment. As the preferable scheme of the application, the upper end surface of the isolation gasket is higher than the upper surface of the tooling substrate after the isolation gasket is arranged in the clamping groove. As the preferable scheme of the application, the isolation gasket is of a hollow ring structure, the size of a hollow cavity o