JP2015201436A - Magnesium card battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that, although a magnesium battery is an energy source full of promise, its degree of recognition is low, which prevents its spread, and that a portable light by a simple emergency battery that is convenient for carrying is demanded because, with respect to a normal battery, there is uncertainty in long-term storage, and it takes a lot of space that brings about inconvenience in carrying, and it is not low in cost, and that spread and recognition of the magnesium battery are demanded.SOLUTION: The spread of the magnesium battery is aimed by utilizing the efficiency of the magnesium battery for emergency. A plurality of units of electromotive layers each obtained by laminating a magnesium plate, an impregnated separator, and a carbon sheet, are arranged on the same surface of a support card that configures a conduction circuit, and sandwiched and unified by the other support cards each configuring the other conduction circuit. Thereby, a card battery that has a potential of an electromotive force while being thin in shape, and that generates electricity by being impregnated with water and electrolyte, can be obtained.

Description

The present invention is a conventional magnesium battery, in which a metal magnesium thin plate serving as a negative electrode, a separator porous resin, a nonwoven fabric or paper, and an electromotive layer formed of a sheet mainly composed of carbon serving as a positive electrode are stacked in layers. Rather than laying multiple units on the same surface in the same plane, sandwiching the back support sheet and the front support sheet in a sandwich form to make a thin card, using one or more of them as the primary card The present invention relates to a magnesium card battery, which is a card-like magnesium battery used for a power source such as an LED, a water detector, a toy, or a medical simple test.

Conventional primary batteries such as manganese dry batteries, nickel manganese batteries, lithium batteries, and zinc-air batteries are cylindrical, button-shaped, square-shaped, thick and have a large volume, making them inconvenient to carry and carry easily. there were. Further, even when not in use, there is an internal discharge, and the switch may be accidentally turned on. When it is desired to use the device over time, there is a case where no electricity is generated.

Air batteries using magnesium have been developed recently. Magnesium is used as a negative electrode and carbon is used as a positive electrode with a separator containing electrolyte in between. Magnesium electrode is used to passivate the surface of magnesium using an alloy containing several percent of calcium. Patent Document 1 discloses an excellent battery in which the electrolyte solution is salt water.

A simple emergency light measuring about 10 x 30 x 60 mm square, which is composed of a plurality of magnesium battery electromotive layers made of magnesium plates, separators, and carbon sheets, placed in a case and connected to an LED, was put on the market as a product. This is a product of the contents of Patent Document 2 and has an excellent function.

When water is added and penetrated into the electromotive layer, the organic acid salt crystals contained in the dry separator containing the electrolyte salt in advance are dissolved in the water, and this becomes the electrolyte solution. If it continues properly, it will generate electricity for 10 hours.

There is also a method in which magnesium is taped, immersed in an electrolytic solution, wound up in accordance with the passivation of the surface, and electromotive force continues. This is that of Patent Document 3, which is aimed at obtaining a large amount of power.

Magnesium's theoretical energy that can be generated is said to be 6460 Wh / kg, which is a promising energy source that is said to be much larger than 200 Wh / kg of the existing lithium ion battery and can extract several times as much energy. Seawater contains about 0.13%, and if it is concentrated and refined with sunlight to extract pure magnesium, it is said to be a promising energy source in the future. Research and development based on this idea has begun.

The technologies of Patent Document 1, Patent Document 2, and Patent Document 3 all have great targets for this energy source, and the present inventor also conducted research and development in the hope of helping to spread magnesium batteries. Yes.

The biggest nuisance to approach this major goal is the lack of public awareness and poor understanding of the development of magnesium batteries. In order to solve this problem, it is necessary to first disseminate small familiar batteries to foster awareness and expectations of energy sources using magnesium batteries.

In the magnesium battery, the electromotive force of one unit of the electromotive layer is about 1.4 V, and when the voltage is increased, the electromotive layers are stacked so as to be in series. The layer is immersed in an electrolytic solution, and in Patent Document 2, an Mg plate, a separator and a carbon sheet are stacked and laminated, and a salt is previously contained in the separator, and an electrolytic solution can be obtained by addition permeation of water. There is something to store in the case.

Any magnesium battery is suitable for long-term storage because it does not self-discharge if it is dried without adding an electrolyte or water. In particular, the product of Patent Document 2 is simple and suitable for the purpose of emergency safety, but a simpler and cheaper product is required.

All of the conventional products have a thickness and a large volume, which is inconvenient for the user to carry, and this has been a problem that prevents the spread of magnesium batteries. For emergency use, there is a need for something that can be carried around all the time. For users, a lighting time of only a few hours is sufficient. It was.

JP 2012-234799 A WO2013-018769 Japanese Patent No. 5034014

An object of the present invention is to provide a magnesium card battery which is thin card-shaped, convenient for possession, and not only lights up easily and reliably when necessary, but also is easy to manufacture.

The present invention
(1) In a magnesium battery that generates electricity by impregnating water or an electrolytic solution into an electromotive layer of a magnesium battery formed by laminating a negative electrode of a magnesium thin plate, an impregnated separator that holds a salt of an electrolytic solution, and a carbon sheet. Multiple units of the magnesium battery electromotive layer with a back support sheet configured inside a thin metal plate shaped as a current conduction circuit and a front support sheet constructed inside a thin metal plate similarly shaped as a conduction circuit Characterized in that a gap or a water supply hole is provided on the surface of the support sheet or the side of the card to add or penetrate water or electrolyte into the magnesium battery electromotive layer. Card battery.
(2) The magnesium card battery according to (1), wherein the magnesium battery electromotive layer is an even number unit.
It is.

The present invention holds one magnesium thin plate or magnesium alloy thin plate (hereinafter referred to as “Mg plate”) indicated by reference numeral 6 in FIG. 6 and the injected water or electrolyte indicated by reference numeral 8. Separator composed of non-woven fabric, paper, porous resin, etc. that contains a monovalent carboxylate salt, sodium chloride salt, etc., and is impregnated and held with an electrolyte produced by injected water (hereinafter referred to as “impregnated separator”) One unit of electromotive layer (hereinafter referred to as “electromotive unit”), which is a combination of one sheet and one carbon sheet (hereinafter referred to as “carbon sheet”) represented by reference numeral 7 and having carbon as a main ingredient. This is the minimum unit for generating electricity, and a current is obtained by bringing a metal thin plate 2 or 3 into contact therewith. In order to increase the voltage obtained to a necessary voltage, this unit is usually set as shown in FIG. The reference numeral 5 in FIG. The thickness of the electromotive unit is the minimum unit of such electromotive aimed to make the card battery as the thickness of the body.

FIG. 6 shows the structure of the electromotive unit denoted by reference numeral 5, and the right is an enlarged view. Reference numeral 6 is an Mg plate, reference numeral 8 is an impregnation separator, and reference numeral 7 is a carbon sheet. This is an electromotive unit of the electromotive layer. Reference numerals 2 and 3 are conductive circuits configured on the back support sheet and the front support sheet. The metal thin plate is usually a copper plate, an aluminum foil, or a brass foil, and includes a metal powder sheet or a conductive resin in addition to the metal foil.

Since the volume of magnesium is almost proportional to the capacity of power generation, that is, the amount of electromotive force, the magnesium is made thinner and the surface area is changed depending on the purpose. Therefore, although the thickness of the electromotive layer produced here was 1.5 mm, it can be further reduced to 1.0 mm or less.

First, the principle of Patent Document 2 will be described. The electromotive layer used here uses the electromotive principle of Patent Document 2. The composition of the Mg plate and the electrolyte and the composition of the carbon sheet are characteristic, but the present invention relates to the structure of this, and the composition is the same as that of a general magnesium battery. The technology was further developed to make the card. Even when the principle of using salt water as an electrolyte for the magnesium-calcium alloy of Patent Document 1 is used, carding can be performed by the same method.

The card is not connected in series like a normal battery as shown in FIG. 8, but the electromotive unit is arranged as shown in FIG. It could be done by sandwiching with.

A back support sheet (hereinafter referred to as “back support sheet”) is configured by pasting, transferring, or printing in the shape of a conductive circuit in which a thin metal plate such as copper is defined (hereinafter referred to as “configuration”). Then, the electromotive unit consisting of three pieces of reference numerals 6, 8, and 7 is put on this, and then the conductive circuit of reference numeral 3 is placed on the front support sheet (hereinafter referred to as “front support sheet”) for coating. The shape is configured and covered and integrated. The material of the back support sheet and the front support sheet may be paper or resin, regardless of the material.

It is desirable that the electromotive units of the stacked electromotive layers are pressed with moderate strength and the surfaces are in contact with each other. For this purpose, it is good to form the storage place (hereinafter referred to as “storage part”) where the electromotive unit is placed in the back support sheet in advance, and put a spacer where the storage part where the electromotive layer enters is placed. It is good to sandwich and seal, and it is also good to put hot melt resin around the position where the electromotive layer comes.

Further, the electromotive unit may be fixed by using the expansion and contraction of the back support sheet and the front support sheet, placing the electromotive unit in a fixed position, and pressing and sealing the surrounding portion.

An example will be described with reference to FIG. 1 and FIG. 2. First, a thin metal plate having the shape of a conduction circuit 2 is formed on a back support sheet 1, and a storage unit for an electromotive unit as shown in FIG. The spacer of the code | symbol 13 which made the hole shape of the code | symbol 4 is put for bonding. This bonding may be any of heat sealing, hot melt sealing, adhesion, and paste, and the center may not be bonded. This is used as a liquid passage when water or an electrolytic solution is added, and the water and the electrolytic solution permeate the impregnated separator through this.

Next, put the Mg plate, impregnation separator, and carbon sheet constituting the electromotive unit of reference number 5 into the hole of the storage unit of the electromotive unit of reference number 4 in the spacer on the back support sheet. Are placed in the reverse order so that each adjacent hole becomes a series circuit. The electromotive unit is shown in FIG. 6. Reference numeral 6 is an Mg plate, reference numeral 7 is a carbon sheet, and reference numeral 8 is an impregnation separator. The contents of three of the electromotive units indicated by reference numeral 5 in FIG. 1 are shown in FIG.

The front support sheet denoted by reference numeral 9 is configured as a conductive circuit in which a metal thin plate such as a copper sheet denoted by reference numeral 3 is in contact with the electromotive unit at the surface on the back surface thereof, for adding and penetrating water denoted by reference numeral 10 or electrolyte. Water supply holes or cuts are configured.

The shape of the thin metal plate of the conduction circuit on the inner surface of the back support sheet and the front support sheet is such that when the electromotive unit is arranged at a fixed position, the whole or part of the thin metal plate is in contact with the Mg plate and the carbon sheet, and the output end The order of conduction from the electromotive unit through the electromotive unit is as follows: copper plate, Mg plate, impregnation separator, carbon sheet, copper plate-copper plate, Mg plate, impregnation separator, carbon sheet, copper plate-copper plate, Mg plate, impregnation separator, carbon sheet, Copper plate-Copper plate, Mg plate, impregnated separator, carbon sheet, copper plate, the shape of the copper plate on the back side of the front and back support sheets is a series circuit connected to the next electromotive unit, and the two adjacent copper plates However, each of the Mg plates is connected to the carbon sheet or from the carbon sheet to the Mg plate.

When a cover sheet of reference numeral 9 is placed and pressure bonded and molded integrally, a magnesium card battery is obtained. The upper surface of the hole 10 may be sealed with an open tape, or the hole may be formed with a cut.

When the terminal of the LED of the code | symbol 11 is made to contact the edge part of the conduction | electrical_connection circuit of a back support sheet and it shape | molds integrally, it will become a card light like FIG. The lower figure in this figure shows the back support sheet connected with LEDs and 4 units of electromotive units. The middle figure is a side view, and the upper figure is the back side of the front support sheet. It is a figure. As shown in FIG. 3, when the end of the conductive circuit of the back support sheet is extended so that the terminal indicated by reference numeral 12 is provided at the end of the card, it can be used as an external power source. This is convenient when the voltage is increased by connecting magnesium card batteries in series.

After putting the electromotive unit in the hole of the storage part, the front support sheet is put on and bonded and integrated. The back support sheet or the front support sheet is provided with a water supply hole on one or both sides or on the side, and is used for adding water and electrolyte.

FIG. 4 is an example in which the storage unit for the electromotive unit is recessed in advance on the back support sheet. In this case, the back support sheet is made of a thermoplastic resin, and the copper plate to be placed in the recess 2 is inserted after the back support sheet is formed. In this case, it is desirable that the depth of the concave portion of the storage portion is formed to be shallower than the thickness of the electromotive unit in order to improve the contact between the electromotive unit and the copper plate. The front support sheet is not molded.

FIG. 10 and FIG. 11 show a case in which an electromotive unit storage portion such as a spacer or a molded recess is not used. First, use thermoplastic resin for the front and back support sheets, place the electromotive unit at a fixed position on the upper surface of the back support sheet, place a front support sheet with water supply holes on it, and partially pressurize it. Seal the area around the electromotive unit.

In this case, as shown in FIG. 10, it is preferable that the shape of the portion that does not contact the electromotive unit of the copper plate be a width necessary for conduction with the contact surface between the Mg plate and the carbon sheet, and the seal portion should be left. When emphasizing the function of the advertising medium, a printed card is fixed on the upper surface of the upper support sheet.

The magnesium card battery of the present invention is convenient for carrying. Therefore, always carry it with other ordinary credit cards and business cards, and when it is necessary to start up and turn on the light, water, saliva, and other liquids at hand will be added to the water supply hole or slit for penetration. Alternatively, it may be added to the slit and allowed to penetrate. This immediately lights up.

The top surface of the water supply hole has an easy open seal, but wrapping the entire body with a waterproof film prevents moisture absorption and is effective for long-term storage.

The surface of this card becomes an effective advertising medium. The person who holds this card will keep it in the card compartment until it is used, and it will learn repeatedly in the memory.

  In addition, as shown in FIG. 3, the one having the connection terminal 12 can be used as a power source for electric equipment, and the voltage can be increased in series when necessary.

The present invention is a thin card-like battery that is lightweight and compact. If the LED light is built in, it becomes a card lamp as it is, and it is always worn, and when it is necessary, water or electrolyte is added and infiltrated to light up or generate electricity. Since it is thin and lightweight, it is convenient to carry and effective as an advertising medium. Since it does not generate electricity in the dry state, it can be stored for a long time. Further, since it is water or an aqueous solution that is necessary for electromotive force, it is thin and light, can be stored for a long period of time, and has an effect that electromotive force and lighting are easy.

Hereinafter, the present invention will be described with reference to examples.

Example 1 will be described with reference to FIG. The back support sheet denoted by reference numeral 1 is resin-coated card-like paper, and the dimensions are 85 mm × 54 mm. As shown by reference numeral 2 in the lower diagram of FIG. 2, a copper thin plate of a conductive circuit having a size in contact with a 14 mm × 14 mm electromotive unit on the surface was adhered by an adhesive method. This structure may be adhesive bonding of a thin copper plate or transfer of metal powder, but here, a single-sided adhesive copper plate was used. The copper plate only needs to be lightly positioned and does not necessarily have to be firmly bonded.

In this embodiment, the LED is fixed to the terminal portion at the right end of the copper thin plate bonded to the back support sheet.

The spacer 13 is a sheet having a thickness of 0.5 to 1.0 mm, which is the same as or thinner than the total thickness of the electromotive unit. As shown by the reference 4 in FIG. It is open. The spacer of the code | symbol 13 has apply | coated hot-melt glue on both surfaces, and sticks it to a back support sheet with this. Here, the hole of the storage part of the code | symbol 4 is cut out so that the near corner | angular of a square hole may be connected. This is due to additive penetration, but this hole need not necessarily be in one place.

Next, the electromotive unit which consists of three 14 mm x 14 mm is put in the hole of the electromotive unit storage part in a spacer. In this order, the front right is the order of the carbon sheet from the bottom, the impregnation separator, and the Mg plate. The front left is the order of the Mg plate, the impregnation separator, and the carbon sheet from the bottom. To be.

In the front support sheet, a copper thin plate of a conductive circuit having the shape of reference numeral 3 is bonded to the back surface in the same manner as the back support sheet. The adhesion of the copper thin plate does not necessarily need to be strong, and it is the same as the back support sheet that can be placed there. The front support sheet is provided with a hole through which water or an electrolytic solution is added and penetrated.

When the front support sheet was stacked and heated and pressurized with a hot press, and the back support sheet, LED, spacer, electromotive unit, and front support sheet were bonded or heat-sealed and integrated, a magnesium card battery was obtained. When water was added to this from the water supply hole in the front support sheet, it penetrated into the impregnated separator of the electromotive unit, and the electromotive unit was activated to turn on the LED, and the lighting continued for about 10 hours.

A second embodiment will be described with reference to FIG. In this case, the electromotive layer is laminated at a predetermined position on the copper plate at the same position as in Example 1 of the back support sheet, which has no spacer, and the hot melt group is hung in the gap. This is a method in which molding is completed by coating and applying pressure on the front support sheet. In this case, do not hang the grease around the hole where water or electrolyte is added and penetrated. FIG. 3 shows a connection terminal 12 having the same structure and extending a copper thin plate of a conduction circuit.

A third embodiment will be described with reference to FIG. This uses a back support sheet in which a concave portion such as 14 is press-molded without using a spacer. Reference numeral 14 is a 0.3 mm thick vinyl chloride sheet used as a thermoplastic resin to form a recess into which an electromotive unit is inserted, and a thin copper plate may be lightly stretched before molding. After forming, a copper thin plate of a conductive circuit is inserted as indicated by reference numeral 2. Next, the electromotive layers are put in the same order as in Example 1.

As the front support sheet of reference numeral 9 in FIG. 4, the back surface coated with vinyl chloride was used. This material is preferably a material coated with the same kind of resin that can be heat-sealed with the back support sheet. Although the copper thin plate of the conduction circuit of FIG. 4 is adhered to this back surface, this copper thin plate may be placed in a fixed position above the electromotive unit without being adhered to the front support sheet. The shape of the copper thin plate of the conductive circuit of reference numerals 2 and 3 is preferably in contact with the entire surface of the electromotive layer, but there is no significant difference in performance even if it is small or protruding.

A fourth embodiment will be described with reference to FIGS. 10 and 11. This method does not use a spacer with a hole, and does not provide a recess in the back support sheet. The shape of the copper plate is made thin except for the position in contact with the electromotive unit as indicated by reference numeral 2 in FIG. 10 to improve the sealability of the front and back support sheets.

The electromotive unit is placed at a fixed position on the copper plate on the back support sheet, and the front support sheet with the copper plate is placed thereon, and the periphery of the electromotive unit is pressure-sealed from above. The seat is stretchable, and the position of the electromotive unit rises to a convex shape when sealed, and the shape is stabilized. After sealing, the electromotive unit is moderately pressed. Although a part of the copper plate is straddling the pressure seal portion, the seal is performed in a sandwiched manner.

When emphasizing the function of the advertising medium, a smooth card is affixed to the upper surface of the front support sheet or the front and back instruction sheets.

Example 5 will be described with reference to FIG. In this system, the electromotive units are arranged in a line. The shape of the copper thin plate of the conduction circuit is as indicated by reference numerals 2 and 3, and the holes for adding water or electrolyte to penetrate the non-adhesive part on the side wall at the bottom of the figure below. It is provided. In the integrated seal of the back support sheet, the spacer, and the front support sheet, the seal bonding is performed without applying any pressure so as to make a slit on the side wall to which water or electrolyte is added and penetrated.

In the case of this method, when arranging a plurality of magnesium card batteries by arranging an output terminal, the water or electrolyte is added and penetrated evenly by arranging the slits to which water or electrolyte is added and penetrated downward. I can do it.

Although four electromotive units are provided here, the number of electromotive units may be further increased according to the required voltage.

A sixth embodiment will be described with reference to FIG. In the case of a magnesium card battery, a combination of 4 units of electromotive layer is suitable for lighting an ordinary LED, but since it is used for an LED having a high operating voltage, there are cases where it is desired to increase the number of electromotive layers. FIG. 9 shows an example of adaptation to this. The code is used in common with others.

In this case, except that LED 11 is attached to the copper thin plate of the conduction circuit of the front support sheet, it is the same as the other explanations, so the explanation is omitted to prevent duplication. In any case, water penetrates by adding water. The lighting was good.

Magnesium card battery stacking structure Deployment structure of magnesium card battery using LED Deployment structure of magnesium card battery using connection terminals Stacked structure of magnesium card battery using back support sheet with vacuum formed recesses Magnesium card battery deployment structure with electromotive layers aligned in one direction Structure of electromotive layer Structure with stacked electromotive layers Structure in which electromotive layers are arranged in series Expanded structure of magnesium card battery with 6 units of electromotive layer Card battery structure without spacers and recesses Cross-sectional perspective view of a card battery without spacers and recesses

In the present invention, a plurality of electromotive layers of a magnesium battery are arranged in the same plane, and are sandwiched and integrated by a support card that constitutes a conductive circuit of a thin metal plate. It is convenient to carry and therefore can also be used as an advertising medium. People who carry it have the sense of security that it can be lit and used in an emergency, and can act safely at night in an emergency. .

DESCRIPTION OF SYMBOLS 1 Back support sheet 2 Copper sheet | seat of conduction circuit of back support sheet 3 Copper sheet | seat of conduction circuit of front support sheet 4 Storage part of electromotive layer 5 Electromotive layer 6 Mg board 7 Carbon sheet 8 Impregnation separator 9 Table support sheet 10 Water Or a hole to which electrolyte is added and penetrated 11 LED
12 Connection terminal 13 Spacer 14 Back support sheet formed with recess

Claims (2)

In a magnesium battery that generates electricity by impregnating water or an electrolyte in the electromotive layer of a magnesium battery formed by laminating a negative electrode of a magnesium thin plate, an impregnation separator that holds a salt of the electrolyte, and a carbon sheet, and a carbon sheet, Multiple units of the magnesium battery electromotive layer are the same in the back support sheet configured with a thin metal plate in the shape of a conductive circuit and the front support sheet configured in the same manner with a thin metal plate in the shape of a conductive circuit. A magnesium card battery comprising a support sheet or a side face of a card, and a gap or a water supply hole through which water or electrolyte is added and penetrated into the magnesium battery electromotive layer. The magnesium card battery according to claim 1, wherein the magnesium battery electromotive layer is an even number unit.