JPH07220738A - Sea water cell - Google Patents

Abstract

PURPOSE:To efficiently perform discharging a sea water cell, using oxygen melted in the sea water as a positive electrode oxidant, and further to facilitate replacement a negative electrode worn by a discharge. CONSTITUTION:A plate-shaped positive electrode 1 is cylindrically interposed between a positive electrode insulator 81 of an upper frame 71 and a positive electrode insulator 82 of a lower frame 72, and also a negative electrode 2 is inserted from an opening part 7B provided in the center of the lower frame 72 so that one end face of the columnar negative electrode 2 inserted with a core metal 12 in the center is positioned in a holding part 7A provided in the center of the upper frame 71 through a negative electrode insulator 9A. By arranging a negative electrode insulator 9B in the other end face of this negative electrode 2, it is formed to be held so as to be fitted to the opening part 7B. By removing the negative electrode insulator for closing the opening part, a negative electrode worn by a discharge can be easily exchanged, and further by the core metal, discharging a cell can be efficiently performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater battery, and more particularly to a seawater battery using magnesium or magnesium alloy as a cathode and oxygen dissolved in seawater as an anodizing agent. .

[0002]

2. Description of the Related Art Seawater batteries that use magnesium or magnesium alloy as the cathode and oxygen dissolved in seawater as the anodic oxidizer can discharge for a long period of time, so they can be used for marine marker lights, buoy lights and fish catching fish. It is used as a power source for lights.

The conventional structure of such a seawater battery is shown in FIG.
As shown in FIG. 3, a spacer 3 is interposed between an anode 1 made of a copper net and a cathode 2 made of a magnesium alloy plate so as not to become a resistance when passing seawater, and they are opposed to each other.
It is stored in a container, and is immersed in seawater to make the battery case 4
Seawater is injected from the seawater inlet provided in the anode, electromotive force is generated by the reduction reaction on the surface of the anode 1, and hydrogen generated by the reaction is discharged from the gas outlet provided in the battery case 4. is there. Reference numeral 10 is an anode lead wire electrically connected to the anode 1, and 11 is a cathode lead wire electrically connected to the cathode 2.

[0004]

The above-mentioned seawater battery can prolong the discharge duration, but the amount of oxygen dissolved in seawater is as small as about 5 to 10 ml / l, and the seawater battery faces the cathode 2. Since the surface area of the anode 1 is small, there is a problem that the discharge is limited to a small current.

Further, in the above-mentioned seawater battery, the anode 1 itself is not consumed by the reduction reaction, while the cathode 2 is consumed by the oxidation reaction. Therefore, the entire battery must be replaced just by exhausting the cathode 2. However, there was a problem that it was not economically preferable.

On the other hand, the cathode 2 may not be consumed uniformly due to non-uniformity of oxygen concentration in seawater, adherence of suspended matter in seawater, crystal structure of the cathode 2 itself, etc. In the case where is significant, the part connected to the cathode lead wire 11 and the part not connected to the cathode lead wire 11 are separated, and the former contributes to the discharge as much as possible, while the latter contributes to the discharge. There was a problem that the discharge stopped without doing so.

[0007]

In order to solve the above-mentioned problems, the present invention provides a disk-shaped lower frame having an anode insulating material provided on the upper surface of the peripheral edge or a disk-shaped lower frame having an anode insulating material provided on the lower surface of the peripheral edge. In the upper frame of, the holding portion for holding the columnar cathode in the center of one frame, the opening for inserting the columnar cathode in the center of the other frame is provided, dissolved in seawater The plate-shaped anode for reducing oxygen is sandwiched in a cylindrical shape between the anode insulator of the lower frame and the anode insulator of the upper frame, and the columnar cathode has a cored bar penetrating in the center. And this cathode is inserted from the opening so that one end face is located in the holding portion via the cathode insulator, and by disposing the cathode insulator on the other end face in the opening portion. It is held so that it fits and reduces the oxygen dissolved in seawater. It is characterized in that to obtain an electromotive force.

[0008]

Therefore, according to the present invention, since one end face of the cathode is located in the holding portion via the cathode insulator and the cathode insulator is arranged on the other end face and fitted into the opening, the cathode is When exhausted, the exhausted cathode can be easily replaced by removing the cathode insulator.

Further, in the present invention, since the cored bar is penetrated through the center of the columnar cathode, even if the cathode is consumed non-uniformly, it is not electrically separated in the middle part, and the cathode can be formed. It can contribute to the discharge as much as possible.

[0010]

EXAMPLES The present invention will be described below based on examples.

FIG. 1 is a sectional view of the seawater battery of the present invention.
The parts having the same functions as are given the same reference numerals.

In FIG. 1, reference numeral 1 denotes a net made of a metal such as nickel, copper, silver or the like having a relatively small ionization tendency or an alloy mainly composed of these metals, and an expanded metal.
A cylindrical shape is formed between a positive electrode insulator 81 provided on the lower surface of the peripheral edge of a synthetic resin upper frame 71 and an anode insulating material 82 provided on the upper surface of the peripheral edge of a synthetic resin lower frame 72 in a stacked form. 2 is a cathode made of a metal having a relatively large ionization tendency such as magnesium, aluminum, zinc, or lead, or an alloy mainly composed of these metals.
The cathode 2 is formed by processing the metal or alloy into a columnar shape and providing a through hole extending from one end face to the other end face, and inserting a core metal into the through hole so that the one end face has a cathode insulator 9A.
The upper frame 71 or the lower frame 72 is positioned so as to be positioned in the holding portion 7A provided at the center of the upper frame 71 or the lower frame 72.
Alternatively, the lower frame 72 is inserted through an opening 7B provided at the other center of the lower frame 72, and a cathode insulator 9B is arranged on the other end surface of the lower frame 72 and is held so as to be fitted into the opening 7B.

The cathode 2 is preferably fitted by a shrink fitting method in which a metal processed into a column shape is heated to 20 to 60% of its melting point to enlarge the through hole, and then the cored bar 12 is fitted and then cooled. .

The anode lead wire 10 is connected to a part of the anode insulator 82 that holds the anode 1, and the cathode lead wire 11 is connected to one end of the cored bar 12 that penetrates the center of the cathode 2. It will be done.

Further, synthetic resins 13A and 13B are injected between the vicinity of one end face of the cathode 2 and the cathode insulator 9A and between the vicinity of the other end face and the cathode insulator 9B, and seawater is injected. Self-discharge due to intrusion is reduced.

In the above-described battery of the present invention, as shown in FIG. 2, the through hole has an inner diameter larger than the outer diameter of the cored bar 12, and has short ends made of zinc, aluminum, tin, iron, and lead. The cored bar 12 with the cylinder 14 attached is fitted into the through hole, or as shown in FIG. 3, the short cylinder 14 is fitted near both end faces of the through hole, and then the cored bar 12 is inserted into the short cylinder 14. It may be inserted, and the short cylinder 14 can improve the conductivity between the cathode 2 and the core 12. In addition,
In this case, zinc, aluminum, tin, or the like is attached to the outer diameter portion of the cored bar 12 where the short cylinder 14 is not mounted or the inner diameter portion of the through hole.
The conductivity between the cathode 2 and the cored bar 12 can be further improved by molding a conductive resin having iron or lead as a carrier.

Further, as shown in FIG. 4, the inner diameter of the through hole and the outer diameter of the cored bar 12 are made substantially equal to each other, and an alloy 15A mainly composed of lead and zinc is fused on the surface, A core metal 12 coated with a conductive coating material 15B having a fine powder of aluminum, tin, iron, or lead as a carrier, and a core metal 12 equipped with an elongated cylinder 15C made of the above-mentioned metal and having a same length. It goes without saying that the same effect can be obtained even if the plug is inserted into.

Although all the cores 12 are cylindrical in shape, they may be cylindrical, so that the force applied to the cores at the time of fitting can be reduced and the fitting can be done easily. You can

On the other hand, although the upper frame 71 and the lower frame 72 are made of synthetic resin, they may be made of a metal material with an insulating coating.

Further, in the above-mentioned seawater battery, the metal or alloy processed into a columnar shape is penetrated through the core metal 12 to form the cathode 2. However, the above metal or alloy is processed into a plate shape and has an ionization tendency from the above-mentioned anode metal. Needless to say, it may be wound around a core metal 12 made of a metal such as iron or an alloy mainly composed of these metals and having a larger ionization tendency than the cathode metal.

Next, as the battery of the present invention described above, a magnesium rod having a radius of 2.5 cm was used as a columnar cathode 2, and an anode 1 made of a copper net having an effective height of 30 cm was placed at a position 25 cm from the center of the rod. The anode 1 has an apparent working area 5 times that of the cathode 2,
As a conventional battery, a battery in which a cathode 2 having the same weight as the cathode 2 of the battery of the present invention and an anode 1 having the same area as the cathode 2 are made to face each other through a spacer 3 at an interval of 5 mm, respectively, When both were immersed in seawater having an oxygen concentration of about 10 ml / l and discharged at 200 mA, the discharge voltage of the battery of the present invention was higher than that of the conventional battery, and the discharge duration of the battery of the present invention was higher than that of the conventional battery. It was found to be 1.5 times the discharge duration. In addition, here, the anode 1
The apparent working area is defined as the surface area of the anode 1 on which the reduction reaction takes place.

Next, when the cathode insulator 9B of the battery of the present invention used in the above test was detached and the cathode 2 was taken out, it was found that the cathode 2 was almost completely consumed except for the core metal 12. When the cathode 2 was attached together with the new core metal 12 and the same test was performed, the same result as the above test was obtained.

In the battery of the present invention described above, the discharge duration can be lengthened by increasing the apparent working area of the anode 1 with respect to the working area of the cathode 2, but if it is made too large, the electric resistance of seawater is increased. Since it becomes large, the upper limit is preferably about 10 times.

In the battery of the present invention described above, a net made of a metal such as nickel or an alloy mainly composed of these metals, or an expanded metal is used as the anode 1, but the above-mentioned metal plate or these is used. The upper frame 71 and the lower frame 72 may be provided with holes for the entry and exit of seawater by using an alloy plate mainly composed of a metal. By doing so, the net, the expanded metal anode 1 and the seaweed may be formed. It is possible to prevent the adherence of the like and the like from hindering the discharge.

[0025]

As described above, according to the present invention, the core metal is penetrated through the cathode of a seawater battery using oxygen dissolved in seawater as an anodic oxidant, and the cathode can be easily replaced. The core metal enables efficient discharge of the battery.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a seawater battery of the present invention.

FIG. 2 is a cross-sectional view of a cathode used in an example of the seawater battery of the present invention.

FIG. 3 is a perspective view of a cathode used in an example of the seawater battery of the present invention.

FIG. 4 is a perspective view of a cathode used in an example of the seawater battery of the present invention.

FIG. 5 is a cross-sectional view of a conventional seawater battery.

[Explanation of symbols]

 1 Anode 2 Cathode 71 Upper Frame 72 Lower Frame 7A Holding 7B Opening 81 Anode Insulator 82 Anode Insulator 9A Cathode Insulator 9B Cathode Insulator 10 Anode Lead Wire 11 Cathode Lead Wire 12 Core Bar 13A Synthetic Resin 13B Synthesis resin

Claims (6)

[Claims] 1. A columnar cathode is provided in the center of one of a disk-shaped lower frame having an anode insulator provided on the upper surface of the peripheral edge or a disk-shaped upper frame having an anode insulator provided on the lower surface of the peripheral edge. The holding portion for holding is provided with an opening for inserting the columnar cathode in the center of the other frame, and the plate-shaped anode for reducing oxygen dissolved in seawater is the lower frame. Is sandwiched in a cylindrical shape between the anode insulator of the above and the anode insulator of the upper frame. Inserted from the opening so as to be located in the holding part through the body, and held so as to fit into the opening by disposing a cathode insulator on the other end face, and dissolved in seawater. A seawater battery characterized in that it reduces the existing oxygen to obtain an electromotive force. 2. The seawater battery according to claim 1, wherein a synthetic resin is injected between the vicinity of both end faces of the columnar cathode and the cathode insulator. 3. A columnar cathode having a cored bar penetrating through the center thereof is formed by winding a plate-shaped cathode metal or alloy around the cored bar. Seawater battery. 4. A short cylinder made of zinc, aluminum, tin, iron, or lead is attached to a part between the cored bar and the cathode, or a conductive resin having the metal as a carrier is molded. Item 1. The seawater battery according to item 1 or 2. 5. An elongated cylinder made of zinc, aluminum, tin, iron, or lead is attached or a conductive resin having the metal as a carrier is molded between the core metal and the cathode. The seawater battery according to item 1 or 2. 6. The seawater battery according to claim 1, wherein the core metal has a cylindrical shape.