CN202423414U - Insulating ring for sodium-sulfur cell - Google Patents

Abstract

The utility model discloses an insulating ring (6) made from ceramic. The insulating ring ensures insulation between an anode and a cathode, and meanwhile, is combined with an anode metal piece (7), a cathode metal piece (8) and a solid electrolyte tube made from Beta-aluminum oxide to seal the anode chamber and the cathode chamber of the sodium-sulfur cell, and is characterized in that a direction parallel with the direction of pressure is taken as the longitudinal direction, a direction perpendicular to the longitudinal direction is taken as the transverse direction, and a longitudinal direction size a/transverse direction b of the longitudinal profile is larger than 1.5 or less than 3.5, wherein the pressure is exerted during that the anode metal piece (7) and the cathode metal piece (8) are combined with the insulating ring (6). By adopting the insulating ring (6) disclosed by the utility model, a stress to the joint of the solid electrolyte tube and the insulating ring (6) is palliated, and the reliability of the joint intensity of the joint is enhanced.

Description

Sodium-sulphur battery is used dead ring

Technical field

The utility model relates to sodium-sulphur battery (below be called the NaS battery) and uses dead ring.

Background technology

As common NaS battery, the NaS battery that for example has structure as shown in Figure 3 is known.NaS battery 101 has: male receptacle 102 cylindraceous is used for holding and contains the fusion sulphur that is dipped in graphite felt etc.; Be used to hold the box (sodium protection tube) 103 of motlten metal sodium; The solid electrolyte tube cylindraceous 104 that the end is arranged is contained in inside with this box 103, and has the function of selective permeation sodium ion; The septal funnel cylindraceous 105 that the end is arranged, its clearance portion between box 103 and solid electrolyte tube 104 separates predetermined distance with this box 103 and solid electrolyte tube 104 and is provided with.

Solid electrolyte tube 104 combines with male receptacle 102 with anode metal spare 107 through adopt the alpha-oxidation aluminum dead ring 106 of glass bond at openend.The flange part 172 that anode metal spare 107 possesses cylindrical portion 171 and stretches out to the internal direction of cylindrical portion 171 from the lower end of cylindrical portion 171.In addition, the upper surface hot press of dead ring 106 has cathodic metal spare 108, and welding is fixed with negative electrode lid 109 on this cathodic metal spare 108.R1 of anode chamber and cathode chamber R2 with NaS battery 101 when utilizing this dead ring 106 to guarantee the insulating properties between anode-cathode seal.In addition, be respectively arranged with anode-side terminal 110 and cathode side terminal 111 on the periphery top of male receptacle 102 with above the negative electrode lid 109.Enclosing with the pressure of regulation at the upper space of box 103 has inert gases such as nitrogen or argon gas, through the pressuring direction of the sodium of this inert gas to box 103 in from aperture 131 outflows that are arranged at cartridge bottom.

In having the NaS battery 101 of this structure; Supply with in the gap of the sodium next door pipe 105 that comes and box 103 after move the top from the aperture of box 103 131 during discharge; Cross in the gap of upper end and next door pipe 105 and solid electrolyte tube 104 of septal funnel 105 and move downwards; And then, become sodium ion and see through solid electrolyte tube 104, with sulphur S in the male receptacle 102 and the electron reaction generation sodium polysulfide that comes through external circuit.Opposite during charging with discharge, the reaction of formation of sodium and sulphur takes place.

But in such NaS battery 101, what the joint of anode metal spare 107 and 108 pairs of dead rings 106 of cathodic metal spare used is hot press.Dead ring 106 is inserted in the cylindrical portion 171 of anode metal spare 107; Flange part 172 of configuration anode metal spare 107 below it; And dispose cathodic metal spare 108 in the above, and exert pressure downwards from the top, make dead ring 106 be engaged in anode metal spare 107 and cathodic metal spare 108 thus.

The utility model content

The problem that utility model will solve

But in such dead ring 106, the bending moment that when hot press, acts on dead ring 106 becomes big, thereby has the possibility of the bond strength reduction that makes solid electrolyte tube 104 and dead ring 106.

The utility model is made in view of such actual conditions, and its purpose is to provide a kind of dead ring of reliability of the bond strength that can improve solid electrolyte tube and dead ring.

The means of dealing with problems

For achieving the above object; The dead ring of the utility model is the dead ring of ceramic; It is in the insulating properties of guaranteeing between anode-cathode; Thereby engage the anode chamber and the cathode chamber of sealing sodium-sulphur battery with the solid electrolyte tube of anode metal spare, cathodic metal spare and beta oxidation aluminum, it is characterized in that

Outer circumferential side engages with anode metal spare below dead ring, on dead ring in all sides engage with cathodic metal spare,

The direction parallel with the direction of exerting pressure is made as vertically; Will with this vertically vertical direction be made as when horizontal; Longitudinal size/the lateral dimension of longitudinal profile is more than 1.0 and below 3.5; Wherein, said pressure applies when said anode metal spare and said cathodic metal spare are engaged in dead ring.

Here, the longitudinal size/lateral dimension of preferred said section is more than 1.5 and below 3.0.

In addition, the longitudinal profile of preferred dead ring is a rectangle

The utility model effect

If adopt the dead ring of the utility model, can relax stress, and can improve the reliability of the bond strength at this junction surface to the junction surface of solid electrolyte tube and dead ring.

Description of drawings

Fig. 1 is the profile of engagement state that is used to explain dead ring and other members of the utility model.

Fig. 2 is the profile that is used to explain the joint method of same dead ring and other members.

Fig. 3 is the cutaway view that possesses the NaS battery that has routine dead ring now.

Description of reference numerals

6 dead rings

7 anode metal spares

8 cathodic metal spares

71 cylindrical portion

72 flange parts

The longitudinal size of a dead ring section

The lateral dimension of b dead ring section

Embodiment

Followingly describe with dead ring with reference to the NaS battery of accompanying drawing to the utility model.In addition, hereinafter, to the identical structure of NaS battery (with reference to Fig. 3) of existing example, omit its explanation.As shown in Figure 1; Dead ring 6 is used in the insulating properties of guaranteeing between anode-cathode; Thereby the anode chamber and the cathode chamber that engage the NaS battery with the solid electrolyte tube of anode metal spare 7, cathodic metal spare 8 and beta oxidation aluminum seal, and this dead ring 6 is formed by potteries such as Alpha-aluminas.

In the utility model; The direction parallel with the direction of exerting pressure is made as vertically; Will with this vertically vertical direction be made as when horizontal; The longitudinal size a/ lateral dimension b of longitudinal profile is more than 1.0 and below 3.5, and wherein, said pressure applies when anode metal spare 7 and cathodic metal spare 8 are engaged in dead ring 6.Because if longitudinal size a/ lateral dimension b is less than 1.0, then the bending moment during hot press becomes big, and the burden at junction surface is become big; If longitudinal size a/ lateral dimension b is greater than 3.5; Then the bending moment during hot press diminishes, and face is pressed and become inhomogeneous, in addition; Hot press constant distance if desired, the material that then needs is many and loss becomes big.In addition, more preferably the longitudinal size a/ lateral dimension b of section more than 1.5 and below 3.0.Longitudinal size a/ lateral dimension b through with section is controlled at this scope, and the face in the time of making hot press presses the balance of uniformity and bending moment best, therefore can effectively improve bond quality and production efficiency.In addition, drop to Min. owing to can will be used for the pottery of dead ring 6, with the cost that reduces dead ring 6.

In addition, as shown in Figure 1, the longitudinal profile that in this embodiment, has shown dead ring 6 is the example of rectangle, but the longitudinal profile of dead ring 6 is not limited to rectangle, for example, also can be the shape that the part of rectangle is cut away.

Then, antianode metalwork 7 describes with the joint method of cathodic metal spare 8 with dead ring 6.As shown in Figure 2, dead ring 6 inserted be arranged at the cylindrical portion 71 of the anode metal spare 7 on the downside joining jig 91 and be placed on the flange part 72, and then on dead ring 6 placement cathodic metal spare 8.In addition, be filled with brazing metal between the top and dead ring 6 of the flange part 72 of anode metal spare 7 following and between the following and dead ring 6 of the flange part 81 of cathodic metal spare 8 top.

Under such state; Exert pressure if be heated to about 500-560 ℃ and on upside joining jig 92; Then with regard to the flange part 72 of anode metal spare 7, its thickness reduces and extends to internal direction (among Fig. 2 left to), and 72a is engaged in the following outer circumferential side of dead ring 6 above it; In addition, with regard to cathodic metal spare 8, the thickness of its flange part 81 reduces and extends to outside direction (Fig. 2 right-of-center in political views's direction), is engaged in all sides in dead ring 6 top below it.

If adopt the dead ring 6 of the utility model, the longitudinal size a/ lateral dimension b through making dead ring 6 sections just can relax the stress to the junction surface of solid electrolyte tube and dead ring 6, and can improve the reliability of the bond strength at this junction surface in above-mentioned scope.

Claims (3)

1. dead ring; Be the dead ring of ceramic, its in the insulating properties of guaranteeing between anode-cathode, thereby engage the anode chamber and the cathode chamber of sealing sodium-sulphur battery with the solid electrolyte tube of anode metal spare, cathodic metal spare and beta oxidation aluminum; It is characterized in that

Outer circumferential side engages with anode metal spare below dead ring, on dead ring in all sides engage with cathodic metal spare,

The direction parallel with the direction of exerting pressure is made as vertically; Will with this vertically vertical direction be made as when horizontal; Longitudinal size/the lateral dimension of longitudinal profile is more than 1.0 and below 3.5; Wherein, said pressure applies when said anode metal spare and said cathodic metal spare are engaged in dead ring.

2. dead ring according to claim 1 is characterized in that, the longitudinal size/lateral dimension of said section is more than 1.5 and below 3.0.

3. dead ring according to claim 2 is characterized in that, the longitudinal profile of dead ring is a rectangle.

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