JPS58197671A - Framed electrode for layer-built cell - Google Patents

Abstract

PURPOSE:To eliminate camber while to assure the flatness on the frame surface of a molded product, by laminating and integrally molding glasswool material on an electrode material between electrode material and insulation frame material. CONSTITUTION:An electrode material 1 is composed of carbon plastic and integrally molded together with microchannel molded frame material 21 and frame material 22 to construct the insulated frames 2a, 2b. Filler such as talc may be filled previously in said insulation frame material. The glasswool 40 to be laminated on the electrode material 1 is formed with a punched section 41 to expose an electrode section in the center, while the width d40 at the circumference is made same or narrower than the width d22 of the frame material. The ratio between the thickness h40 of said glasswool 40 and the total thickness of the frame material 21, 22 (h21+h22) is selected in the range of 1/1.2-1/2.0, preferably to 1/1.6. Such material is thermally pressed from both sides around the electrode material 1 then integrally molded to produce a framed electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a framed electrode for use in a metal (for example Zn)--rogen (for example Br) electrolyte circulation interstitial primary-secondary battery. More specifically, the present invention relates to a framed electrode for a laminated battery that is constructed by integrally molding an electrode portion formed using a conductive resin material and an insulating frame that holds this electrode portion. It is something that

FIG. 1 is a basic configuration diagram of an electrolyte circulation interstitial battery 1@secondary battery, which is one of the batteries in which the electrode according to the present invention is used. In this battery, a cathode 1 and an anode 6 are installed on both sides with a separator 5 in between, and catholyte is supplied and circulated from a catholyte storage tank 6 to a cathode chamber 2 between the cathode 1 and separator 5. It is configured to supply and circulate anolyte from an anolyte acid storage tank 7 to an anode chamber 4 between an anode 6 and a separator 5. In addition, 9m and 9b are pumps for liquid circulation, and 10
1 and 2 are exploded perspective views showing an example of a stacked battery structure. In this figure, 11 is an aluminum fastening end plate, 12 is a resin fastening end plate, 16 is a packing, 14 is an electrode end plate, and 1st- is a terminal composed of a wire mesh number. Each electrode 1 and separator 5 are stacked as shown in the figure, and sandwiched from both sides by an island plate 11 with aluminum Wt.
The whole thing is assembled as one with the port 16 and the tightening nut 17.
The electrolyte liquid is transferred from manifold 1B to Changi Lu 19.
It passes through the microchannel 20, is supplied to the surface of the 'tr pole part, and is also circulated.

By the way, the electrode 1 used in such a laminated 1111 cell VC can be integrally formed with an insulating frame by Lee/Jeno/Yong mold method or heat press mold method. -The main properties required for molded electrodes are chemical resistance, impermeability to MPS liquid, and low electrical resistance. Oh. Therefore, as an electrode material, the base polymer has traditionally been a polyolefin (eg, polyethylene) resin, which has a surface pre-charge and high illuminance.

Tokosaba Carbon, which is made by kneading carbon black in proportion.
plastic is used.

These electrode materials and insulating frame materials are pre-molded into a plate shape, and when used, they are cut into an appropriate shape that takes into account the shape of the molded product and the shape of the molded product. It is inserted into a mold and heated and compressed to form the desired molded product.

Now, in the framed electrode configured as described above,
The insulating frame material that is integrally molded with the electrode is softer than the conventional electrode wood, and its expansion rate is nearly twice as high, so there is a problem that some warpage inevitably remains after the integral molding.

FIG. 6 is an exploded view of the structure of a framed electrode designed to solve this problem. This frame dL has a frame material and a -j-shaped fiber 2- (e.g. talc, glass wool*) in an insulating frame cable material 21, 22 which is integrally molded with an electrode cable material (e.g. carbon plastic) 1. 50 is mixed into the integral molding at the same time. This brings the expansion coefficients of the insulating frames 2a and 2b closer to the linear expansion coefficient of the electrode material 10, thereby eliminating warpage after molding.

However, in such a configuration, although the warpage of the molded product is eliminated, a new problem arises in that the surface flatness of the molded product frame is significantly impaired, and post-processing such as annealing is required after molding. There was a flaw that made it necessary.

Here, the present invention aims to realize a framed electrode that can suppress the warpage of the molded product and ensure flatness of the surface of the molded product frame, thus ensuring a constant quality of the product. There is something to do.

In the framed electrode according to the present invention, 11 is a pole material, and ? The special characteristic ρ is that the glass wool material is overlaid on the electrode material and integrally molded between the electrode material and the edge frame material. In addition, in the framed electrode according to the present invention, if the thickness of the 11-pole material and 1vF6 of the glass wool material superimposed thereon are equal to y, then Q' is the insulating frame superimposed on the glass wool material. The thickness of the glass wool material is 1.2 to 2
．． There is another % image at a point selected in the range 0, preferably 411.6±0.1.

FIG. 4 is an exploded view of the frame structure according to the present invention. In the figure, reference numeral 1 denotes an electrode material, for example, made of Carbo Plus Snack. 21 is a microchannel molding frame material, and 22 is a frame material, which are integrally molded to constitute the insulating frames 2a and 2b.

Note that filler such as talc may be filled in advance in these insulating frame materials. 4o is glass wool that is superimposed on the electrode material 1, and a punched portion 41 is formed in the center so that the electrode portion is exposed, and the width d40 of the peripheral edge portion is equal to or greater than the width d2□ of the frame material 22. It is narrowly structured. Further, the ratio h40/(h21+h22) of the thickness h40 of this glass wool 40 to the total thickness (h21 + h22) of the frame materials 21 and 22 is 1/1.2 to 1.
/2. [J range, preferably 1/1.6.

Framed electrodes are made by thermo-compressing each of these materials from both sides with the electrode material 1 at the center and integrally molding them, which completely eliminates warping of the molded product and improves the flatness of the frame surface. Can be secured. Therefore, a high quality framed electrode can be easily realized.

In addition, if the thickness of the glass wool is not selected within the above-mentioned range with respect to the thickness of the frame material in the example shown in [-], the warpage of the molded product may increase or the surface may become uneven. Otherwise, the excess resin may flow onto the effective electrode surface and form an insulating film, resulting in negative effects such as narrowing the effective electrode area.

[Brief explanation of drawings]

Fig. 1 is a basic configuration diagram of a battery in which the electrode according to the present invention is used, Fig. 2 is an exploded perspective view showing an example of a laminated structure of the battery shown in Fig. 1, and Fig. 6 is a configuration of a framed electrode. Exploded diagram, 4th
The figure is an exploded view of the structure of eleven parts with a frame according to the present invention. DESCRIPTION OF SYMBOLS 1... Electrode material, 21... Microchannel molding frame material, 22... Frame material, 2m, 2b... Insulating frame,
40-... Dallas Wool (Fig. 4) Representative Patent Attorney Sanro Kimura Fig. 1 tR3 Fig. 4 χ

Claims (1)

[Claims] (A framed electrode for a laminated battery, in which 11' is between an electrode material and an insulating frame material, and is formed by integrally molding a glass wool material overlaid on the electrode material. (2111 poles) The thickness of the material and the thickness of the glass wool material should be approximately equal, and the thickness of the insulating frame overlaid on this Dallas wool material should be 1 to the thickness of the glass wool material.
．． 2 to 2.0, preferably 1.6±0.1, the framed electrode of the stacked battery according to claim 1,
. (6) The insulating frame material is filled with a filler in advance. (4) The width of the glass wool material is slightly narrower than the width of the insulating frame material. % bonito A framed electrode for a laminated battery according to claim 1.