JP2015043281A - Magnesium air cell and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnesium air cell, etc. capable of supplying electrolyte to the vicinity of an electrode.SOLUTION: A magnesium air cell 100 comprises: a magnesium fuel body 200; a cell body part 300; electrolyte 400; an electrolyte tank 410; an electrolyte supply tube 420; a supply reel 500; and a takeup reel 510, uses oxygen in the air as a cathode active material, and uses magnesium as an anode active material. When the takeup reel 510 takes up the magnesium fuel body 200, the electrolyte tank 410 is pressed, deform, the electrolyte 400 is pushed out, and supplied to the cell body part 300 where an oxidation reduction reaction occurs.

Description

  The present invention relates to a magnesium air battery and an electronic device.

  As an example of a magnesium air battery using oxygen in the air as a positive electrode active material and magnesium as a negative electrode active material, Patent Document 1 discloses a cartridge-type magnesium battery. Specifically, in the magnesium battery described in Patent Document 1, each end of the magnesium thin film is connected to a pair of reels, and the magnesium thin film is wound by rotating the reel, and the magnesium thin film between the reels, The positive electrode located in the vicinity cooperates to generate power.

JP 2012-15013 A

  In the magnesium-air battery, water is necessary for the oxidation-reduction reaction for generating an electromotive force, so it is necessary to supply water near the electrode. Also, in order to efficiently exchange ions between the positive electrode and the negative electrode, it is essential to supply a sufficient electrolyte. However, in the magnesium battery described in Cited Document 1, the electrolyte cannot be supplied near the electrodes. For this reason, even if the electrolytic solution is consumed due to the progress of the oxidation-reduction reaction, there is a problem that the electrolytic solution cannot be added.

  This invention is made | formed in view of this problem, Comprising: It aims at providing the magnesium air battery which can supply electrolyte solution to an electrode vicinity, and an electronic device provided with the magnesium air battery.

In order to achieve the above object, a magnesium air battery according to the first aspect of the present invention provides:
A magnesium fuel body containing magnesium;
A rotatable supply reel to which one end of the magnesium fuel body is connected and to which the magnesium fuel body before reaction is wound;
A rotatable take-up reel connected to the other end of the magnesium fuel body and winding up the magnesium fuel body after reaction;
A positive electrode having conductivity and supplying electrons to oxygen;
An electrolyte for exchanging ions between the positive electrode and the magnesium fuel body;
An electrolyte holding material that is impregnated and held with the electrolyte; and
An electrolyte bath containing the electrolyte solution;
An electrolyte solution supply pipe communicating with the electrolyte solution holding material and the electrolyte solution tank;
The magnesium fuel body has a portion stretched between the supply reel and the take-up reel,
The electrolyte solution holding material is disposed between the positive electrode and the stretched portion of the magnesium fuel body,
When the take-up reel winds up the magnesium fuel body after the reaction, the electrolytic solution is supplied from the electrolytic solution tank to the electrolytic solution holding material through the electrolytic solution supply pipe.
It is characterized by that.

The electrolyte tank comes into contact with the magnesium fuel body after the wound reaction,
When the take-up reel winds up the reacted magnesium fuel body, the wound-up reacted magnesium fuel body presses the electrolyte soot, deforms the electrolyte soot, and pushes out the electrolyte. And may be supplied to the electrolyte solution holding material.

A supply device for supplying the electrolytic solution from the electrolytic solution tank to the electrolytic solution holding material;
When the take-up reel winds up the reacted magnesium fuel body, the electrolyte solution may be supplied from the electrolyte tank to the electrolyte holding material by the supply device.

The magnesium fuel body is:
A conductive film having conductivity;
A magnesium thin film attached to the conductive film;
And a permeable film that covers the magnesium thin film and transmits ions.

  The magnesium fuel body may be formed in a thin ribbon shape.

  The magnesium fuel body may be formed in a wire shape.

  The positive electrode may be formed of at least one of carbon, metal, and manganese oxide.

The magnesium fuel body, the positive electrode, and the electrolyte holding material are a first magnesium fuel body, a first positive electrode, and a first electrolyte holding material, respectively.
A first portion including magnesium, wound at one end connected to the supply reel, wound at the other end connected to the take-up reel, and stretched between the supply reel and the take-up reel. Second magnesium fuel body, a second positive electrode electrically connected to the first magnesium fuel body, having conductivity and supplying electrons to oxygen, and a first impregnated and held in the electrolyte. 2 electrolyte solution holding material,
The electrolyte exchanges ions between the second positive electrode and the second magnesium fuel body;
The electrolytic solution supply pipe communicates with the second electrolytic solution holding material and the electrolytic solution bowl,
The second electrolyte holding material is disposed between the second positive electrode and the stretched portion of the second magnesium fuel body,
When the take-up reel takes up the second magnesium fuel body after the reaction, the electrolytic solution may be supplied from the electrolytic solution tank to the electrolytic solution holding material through the electrolytic solution supply pipe.

  The first positive electrode and the first electrolytic solution holding material, and the second electric positive electrode and the second electrolytic solution holding material are shifted in the direction in which the first magnesium fuel body is stretched. It may be arranged.

  You may further provide the case which accommodates the whole.

An electronic device according to a second aspect of the present invention is:
Comprising a magnesium-air battery according to the first aspect of the present invention;
It is characterized by that.

A driving device for rotating the take-up reel;
A rechargeable secondary battery,
When the remaining capacity of the secondary battery is equal to or less than a threshold value, the secondary battery may be charged by rotating the take-up reel to extract electric power from the magnesium-air battery.

  ADVANTAGE OF THE INVENTION According to this invention, the magnesium air battery which can supply electrolyte solution to an electrode vicinity, and an electronic device provided with the magnesium air battery can be provided.

1 is a plan view showing a schematic configuration of a magnesium air battery according to Embodiment 1. FIG. In Embodiment 1, it is a schematic plan view which shows a mode that a magnesium fuel body presses an electrolytic solution soot. It is a perspective view which shows schematic structure of the electronic device which uses the magnesium air battery which concerns on Embodiment 1 as a power supply. 5 is a schematic cross-sectional view of a magnesium fuel body in Embodiment 2. FIG. 6 is a plan view showing a schematic configuration of a magnesium-air battery according to Embodiment 3. FIG. 6 is a plan view showing a schematic configuration of a magnesium-air battery according to Embodiment 4. FIG. FIG. 5A is a schematic plan view showing a reel and a magnesium fuel body in Embodiment 4, and FIG. 5B is a schematic side view.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
A configuration of the magnesium-air battery 100 according to Embodiment 1 will be described. The magnesium-air battery 100 is a magnesium-air battery that uses oxygen in the air as a positive electrode active material and magnesium as a negative electrode active material. FIG. 1 is a plan view showing a schematic configuration of a magnesium-air battery 100 according to the present embodiment. As shown in FIG. 1, the magnesium-air battery 100 includes a magnesium fuel body 200, a battery main body 300, an electrolyte 400, an electrolyte tank 410, an electrolyte supply pipe 420, a supply reel 500, and a winding. And a reel 510.

  The magnesium fuel body 200 is a thin film of metallic magnesium formed in a thin ribbon shape. The magnesium fuel body 200 has one end connected to the supply reel 500 and the other end connected to the take-up reel 510, and includes a portion wound around each reel and a portion stretched between the two reels. Most of the magnesium fuel body 200 is wound around the supply reel 500 in an unused state, and is wound around the take-up reel 510 as the reaction proceeds. The magnesium fuel body 200 functions as a negative electrode active material of the magnesium air battery 100.

  The battery body 300 generates an electromotive force by advancing the oxidation-reduction reaction. The battery main body 300 includes a positive electrode 310 and an electrolyte solution holding member 320, and is disposed so as to contact a portion stretched between the supply reel 500 and the take-up reel 510 of the magnesium fuel body 200. The battery body 300 can have any size depending on the size of the electronic device using the magnesium-air battery 100. Since the magnitude of the current taken out from the magnesium-air battery 100 is determined by the magnitude in the longitudinal direction of the magnesium fuel body 200 of the battery main body 300, the magnitude of the current may be increased when it is desired to increase the current.

  The positive electrode 310 is formed of a conductive material, and supplies electrons to oxygen in the air that is the positive electrode active material of the magnesium-air battery 100. The positive electrode 310 desirably has a large surface area and easily adsorbs oxygen in order to promote a reaction for reducing oxygen. Examples of the material forming the positive electrode 310 include, but are not limited to, carbon, metal, manganese compounds, and combinations thereof. Of these, carbon can take the form of activated carbon, carbon powder, carbon fiber, carbon nanotube, carbon felt, and the like.

  The electrolytic solution holding member 320 is impregnated and held with the electrolytic solution 400 to prevent a short circuit between the magnesium fuel body 200 and the positive electrode 310. The electrolyte solution holding member 320 is disposed between the magnesium fuel body 200 and the positive electrode 310. Examples of the material for forming the electrolyte solution holding material 320 include filter paper, non-woven fabric, felt, and gel, but are not limited thereto.

  The electrolytic solution 400 is an electrolytic solution that enables exchange of ions between the magnesium fuel body 200 and the positive electrode 310. Further, water contained in the electrolytic solution 400 is used for a reaction in which oxygen is reduced at the positive electrode 310. The electrolytic solution 400 is sealed in an electrolytic solution container 410 and is supplied to the electrolytic solution holding material 320 via the electrolytic solution supply pipe 420. The electrolyte 400 is, for example, a sodium chloride aqueous solution, but is not limited thereto.

  The electrolytic solution bowl 410 is a container in which the electrolytic solution 400 is enclosed. The electrolyte tank 410 is fixed to, for example, an electronic device or the like in which the magnesium-air battery 100 is incorporated, and is disposed so that a part thereof is in contact with the magnesium fuel body 200 wound on the winding reel 510. The electrolyte tank 410 has flexibility, a part that deforms with the wound magnesium fuel body 200, a part that does not have flexibility, or a part that is not deformed by being covered by a cover (not shown) or the like. ,including. With this configuration, when the magnesium fuel body 200 is wound around the take-up reel 510, the volume of the electrolyte tank 410 is reduced by being pushed away by the wound magnesium fuel body 200. As a material for forming the electrolytic solution cup 410, for example, synthetic resin may be mentioned, but the material is not limited thereto.

  The electrolytic solution supply pipe 420 is a pipe that transports the electrolytic solution 400. The electrolyte supply pipe 420 communicates with the electrolyte holding material 320 and the electrolyte tank 410. As a material for forming the electrolyte solution supply pipe 420, for example, synthetic resin can be used, but the material is not limited to this.

  The supply reel 500 and the take-up reel 510 are a pair of reels and are formed to be rotatable. Supply reel 500 and take-up reel 510 are rotatably fixed to, for example, an electronic device in which magnesium-air battery 100 is incorporated. The supply reel 500 is wound with the magnesium fuel body 200 before the reaction, and the take-up reel 510 takes up the magnesium fuel body 200 after the reaction. When the take-up reel 510 takes up the reacted magnesium fuel body 200, the unreacted magnesium fuel body 200 is supplied from the supply reel 500 to the battery main body 300.

  Next, the principle that the magnesium air battery 100 continuously generates an electromotive force will be described.

  In the battery main body 300, an oxidation-reduction reaction occurs and an electromotive force is generated. As the reaction proceeds, the magnesium fuel body 200 and the electrolyte 400 are consumed.

  When the take-up reel 510 is rotated in the direction in which the magnesium fuel body 200 is taken up, the consumed magnesium fuel body 200 is taken up, and an unreacted portion of the magnesium fuel body 200 is supplied from the supply reel 500 to the battery body 300. Is done.

  When the magnesium fuel body 200 is wound on the take-up reel 510, the wound magnesium fuel body 200 presses the electrolyte tank 410 in the direction of arrow A as shown in FIG. A portion in contact with the fuel body 200 is deformed. As a result, the electrolyte 400 in the electrolyte bath 410 is pushed out in the direction of arrow B and supplied to the battery body 300 through the electrolyte supply pipe 420.

  That is, by rotating the take-up reel 510, the new magnesium fuel body 200 and the electrolytic solution 400 are supplied to the battery body 300. As a result, an oxidation-reduction reaction occurs continuously in the battery main body 300, and an electromotive force continues to be generated.

  As described above, the magnesium-air battery 100 according to Embodiment 1 can supply new magnesium and an electrolytic solution to a portion where the oxidation-reduction reaction occurs, and can efficiently proceed the reaction and continuously generate an electromotive force. Is possible.

  The amount of the electrolyte 400 supplied can be increased or decreased by increasing or decreasing the area of the portion in contact with the magnesium fuel body 200 and the volume of the portion that is deformed by being pressed by the magnesium fuel body 200. .

  The take-up reel 510 rotates at a speed at which the magnesium fuel body 200 reacts sufficiently. The speed at which the magnesium fuel body 200 reacts is uniquely determined by the configuration of the magnesium fuel body 200, for example, the thickness of the magnesium fuel body 200, so that the speed at which the take-up reel 510 rotates can be made constant. .

  Next, a method of using the magnesium air battery 100 as a power source for the electronic device will be described.

  FIG. 3 is a perspective view illustrating a schematic configuration of an electronic device 700 that uses the magnesium-air battery 100 as a power source. As shown in FIG. 3, the electronic device 700 includes a secondary battery 710. A driving device 720 is attached to the electronic device 700, and the magnesium air battery 100 is attached to the driving device 720.

  The electronic device 700 is an electronic device that operates with power supplied from a battery, such as a mobile phone, a smartphone, or a personal computer. The electronic device 700 is electrically connected to the magnesium-air battery 100 and the driving device 720 by, for example, a cable, a connection adapter, or the like (not shown).

  The secondary battery 710 is a rechargeable secondary battery, such as a lithium ion secondary battery. The secondary battery 710 serves as a direct power source for operating the electronic device 700.

  The drive device 720 is a device that rotates the take-up reel 510 of the magnesium-air battery 100. Drive device 720 includes a rotating shaft connected to take-up reel 510 and a power source that rotates the rotating shaft. The power source is, for example, a spring or a motor.

  The electronic device 700 operates with power supplied from the secondary battery 710. The electronic device 700 monitors the remaining capacity of the secondary battery 710, and operates the driving device 720 when the remaining capacity of the secondary battery 710 is equal to or less than a threshold value. This may be performed by an application installed in the electronic device 700. By introducing this application software, any electronic device can be operated by the magnesium-air battery 100.

  The driving device 720 generates an electromotive force in the magnesium air battery 100 by rotating the take-up reel 510 of the magnesium air battery 100. The magnesium-air battery 100 in which the electromotive force is generated charges the secondary battery 710 via the electronic device 700.

  By using the magnesium air battery 100 in this way, the magnesium air battery 100 can be used as a power source for the electronic device 700.

  The magnesium air battery 100 can be used as a power source even when the secondary battery 710 is provided as a power source by the configuration in which the magnesium air battery 100 is attached to the outside of the electronic device 700. Moreover, since the external appearance of the magnesium-air battery 100 can be freely configured, the electronic device 700 can be configured to be decorated.

  The used magnesium-air battery 100 can be collected by, for example, a convenience store and can be reused by replacing the magnesium fuel body 200 and the electrolyte 400. The recovered magnesium fuel body 200 and electrolytic solution 400 recovered at this time can be used as a raw material for making a new magnesium fuel body 200 and electrolytic solution 400.

  Since the capacity of the magnesium-air battery can be increased compared to a lithium-ion secondary battery of the same size, if the magnesium-air battery is used as described above, it can be charged from an AC power source for a long time. Electronic devices can be used without having to

  Taking a smartphone as an example, the capacity of a lithium ion secondary battery mounted on a current smartphone is about 1000 to 2000 mAh. It is said that smartphones need to be charged almost every day, and 1000-2000 mAh is consumed in one day. The inventor conducted an experiment using a magnesium thin film having a thickness of 40 μm to realize a magnesium air battery having a capacity per 1 g of magnesium of 1300 mAh / g. That is, a magnesium-air battery that supplies power for one day of a smartphone with 1 g of magnesium can be realized. If a magnesium air battery using 30 g of magnesium is used, the smartphone can be used without being charged for one month. When 30 g of magnesium is converted into a 1 cm wide ribbon-shaped magnesium thin film wound on a reel, the diameter of the reel is 4.6 cm. This is a size that can be accommodated in an electronic device such as a smartphone.

(Embodiment 2)
The magnesium-air battery 110 according to the second embodiment is the same as the magnesium-air battery 100 according to the first embodiment, except that the magnesium fuel body 200, which is a thin film of metallic magnesium formed in a thin ribbon shape, is formed of a film and metallic magnesium. The magnesium fuel body 210 is replaced. Common components are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 4 is a schematic cross-sectional view of the magnesium fuel body 210. The magnesium fuel body 210 includes a conductive film 220, a magnesium thin film 230 attached on the conductive film 220, and a transmission film 240 that covers the magnesium thin film 230. The conductive film 220 is a film having conductivity and flexibility, and is made of, for example, a conductive plastic. The magnesium thin film 230 is a magnesium thin film that functions as a negative electrode active material of the magnesium air battery 110. The transmission film 240 is a film that transmits ions necessary for the oxidation-reduction reaction, and is formed of, for example, a nonwoven fabric or an ion exchange resin.

  The magnesium fuel body 210 is disposed so that the side on which the permeable film 240 is disposed is in contact with the electrolyte solution holding member 320, and exchanges ions necessary for the oxidation-reduction reaction with the positive electrode 310. Further, the side of the magnesium fuel body 210 where the conductive film 220 is disposed functions as the negative electrode of the magnesium-air battery 110.

  When the magnesium fuel body 210 is used, even if the reaction proceeds and the entire magnesium thin film 230 is completely dissolved, the film does not tear. In addition, since products such as magnesium hydroxide and magnesium oxide generated as a result of the reaction are held between the films, these products are not mixed into the electrolyte 400 and contaminate the electrolyte 400. Product recovery is also facilitated. As a result, the utilization efficiency of magnesium can be increased and the electric power with respect to the weight can be increased.

(Embodiment 3)
A magnesium air battery 120 according to the third embodiment is obtained by housing the magnesium air battery 110 according to the second embodiment in a case. Common components are denoted by the same reference numerals and description thereof is omitted.

  FIG. 5 is a plan view showing a schematic configuration of the magnesium-air battery 120 according to the present embodiment. The magnesium-air battery 120 includes a magnesium fuel body 210, a battery body 300, an electrolyte 400, an electrolyte tank 410, an electrolyte supply pipe 420, a supply reel 500, a take-up reel 510, and a case 600. , Guides 610 and 620.

  The case 600 includes a magnesium fuel body 210, a battery main body 300, an electrolyte 400, an electrolyte tank 410, an electrolyte supply pipe 420, a supply reel 500, a take-up reel 510, guides 610 and 620. , To accommodate. Case 600 is made of, for example, a synthetic resin.

  The guide 610 is positioned between the supply reel 500 and the battery main body 300, and the guide 620 is positioned between the battery main body 300 and the take-up reel 510. The guides 610 and 620 are in contact with the magnesium fuel body 210 and define the position of the magnesium fuel body 210. The guides 610 and 620 have slidability and are made of, for example, a synthetic resin.

(Embodiment 4)
The magnesium air battery 130 according to the fourth embodiment includes two magnesium air batteries 110 according to the second embodiment, which are connected in series and housed in one case. Common components are denoted by the same reference numerals and description thereof is omitted.

  FIG. 6 is a plan view showing a schematic configuration of the magnesium-air battery 130 according to the present embodiment. The magnesium-air battery 130 includes a first magnesium fuel body 250, a second magnesium fuel body 260, a first battery body 330, a second battery body 340, an electrolyte 400, an electrolyte tank 410, an electrolytic solution supply pipe 420, a supply reel 520, a take-up reel 530, a case 600, guides 630, 640, 650, and 660, and a conducting wire 670.

  The first magnesium fuel body 250 and the second magnesium fuel body 260 are formed in the same manner as the magnesium fuel body 210 of the second embodiment.

  The first battery body 330 and the second battery body 340 are formed in the same manner as the battery body 300 of the first embodiment. That is, the first battery main body 330 includes a first positive electrode and a first electrolyte solution holding material, and the second battery main body 340 includes a second positive electrode and a second electrolyte solution holding material. The first battery main body 330 and the second battery main body 340 are arranged so as to be shifted in the direction in which the first magnesium fuel body 250 is stretched between the supply reel 520 and the take-up reel 530.

  The supply reel 520 and the take-up reel 530 are formed in the same manner as the supply reel 500 and the take-up reel 510 of the first embodiment, respectively. The supply reel 520 is wound with a first magnesium fuel body 250 and a second magnesium fuel body 260 with one ends connected to each other. Similarly, a first magnesium fuel body 250 and a second magnesium fuel body 260 are connected to the take-up reel 530 at the other ends.

  FIG. 7A is a schematic plan view of the first magnesium fuel body 250 and the second magnesium fuel body 260 wound around the supply reel 520, and FIG. 7B is a schematic side view thereof. . As shown in FIG. 7A, the first magnesium fuel body 250 and the second magnesium fuel body 260 are wound around the supply reel 520. As shown in FIG. 7B, the first magnesium fuel body 250 and the second magnesium fuel body 260 are wound in parallel to a direction perpendicular to the rotation axis of the supply reel 520.

  The guides 630, 640, 650, and 660 are formed in the same manner as the guides 610 and 620 of the third embodiment. The guide 630 is located between the supply reel 520 and the first battery body 330, and the guide 640 is located between the first battery body 330 and the take-up reel 530. The guides 630 and 640 are in contact with the first magnesium fuel body 250 and define the position of the first magnesium fuel body 250. The guide 650 is positioned between the supply reel 520 and the second battery main body 340, and the guide 660 is positioned between the second battery main body 340 and the take-up reel 530. The guides 650 and 660 are in contact with the second magnesium fuel body 260 and define the position of the second magnesium fuel body 260.

  The first magnesium fuel body 250, the first battery body 330, the electrolyte 400, the electrolyte tank 410, the electrolyte supply pipe 420, the supply reel 520, and the take-up reel 530 are one. Construct a magnesium-air battery. Similarly, the second magnesium fuel body 260, the second battery body 340, the electrolyte 400, the electrolyte tank 410, the electrolyte supply pipe 420, the supply reel 520, and the take-up reel 530 are provided. Constitute another magnesium-air battery. The electrolytic solution 400, the electrolytic solution container 410, the electrolytic solution supply pipe 420, the supply reel 520, and the take-up reel 530 are commonly used for two magnesium-air batteries.

  The conducting wire 670 is a conducting wire that connects two magnesium-air batteries in series. One end of the conducting wire 670 is in contact with the conductive film of the first magnesium fuel body 250, and the other end is electrically connected to the positive electrode of the second battery main body 340.

  By configuring as described above, the magnesium-air battery 130 has one magnesium air in which the positive electrode of the first battery body 330 is used as a positive electrode terminal and the conductive film of the second magnesium fuel body 260 is used as a negative electrode terminal. Functions as a battery. The electromotive force of the magnesium air battery 130 is approximately twice that of the magnesium air battery 120 according to the third embodiment.

  Since the first battery main body 330 and the second battery main body 340 are arranged so as to be shifted from each other, the overall volume increases even if each battery main body is formed large in order to obtain a large current. Can be suppressed. As a result, a magnesium air battery capable of obtaining a large voltage and a large current with a small volume can be realized.

  Note that the use of the magnesium-air battery as the power source of the electronic device 700 has been described only in the first embodiment, but the magnesium-air battery according to the embodiment 2-4 can also be used as the power source of the electronic device 700. It is.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment.

  For example, in Embodiment 1, although the part which contact | connects the magnesium fuel body 200 of the electrolyte tank 410 has flexibility, it is not restricted to this. That is, it may be anything that is deformed by being pressed by the magnesium fuel body 200 taken up by the take-up reel 510, and may be, for example, a cylinder that is pushed into the piston by the magnesium fuel body 200. . The same applies to Embodiment 2-4.

  In the first embodiment, the electrolyte tank 410 is disposed so as to partially contact the magnesium fuel body 200 wound on the take-up reel 510, and is pushed away from the wound magnesium fuel body 200. It is not limited to this. That is, the electrolyte bath 410 may be in contact with a supply device, such as a pump, that pushes or sucks the electrolyte 400 from the electrolyte bath 410 and supplies it to the battery main body 300. At this time, the supply device may directly convert the rotational motion of the take-up reel 510 into a motion for supplying the electrolytic solution, or may have a power source other than the take-up reel 510, and take-up reel. It may operate along with the rotation of 510. As a method for supplying the electrolytic solution 400 by the supply device, for example, a method of pressing the electrolytic solution cup 410 or a method of sucking out the electrolytic solution disposed between the electrolytic solution cup 410 and the electrolytic solution supply pipe 420 is cited. However, it is not limited to this. In the configuration in which the electrolyte tank 410 is pressed against the wound-up magnesium fuel body 200, the volume of the supplied electrolyte solution 400 does not exceed the volume of the wound-up magnesium fuel body 200, but via the supply device. In the configuration, it is possible to supply the electrolyte 400 having a volume equal to or larger than the volume of the wound magnesium fuel body 200. The same applies to Embodiment 2-4.

  Further, although the magnesium fuel body 200 is formed in a thin ribbon shape, the present invention is not limited to this. That is, the magnesium fuel body 200 may be formed into a shape that can be wound around a reel, and may be formed in a wire shape, for example. The same applies to the magnesium thin film 230 in the magnesium fuel body 210.

  Further, although the magnesium fuel body 200 is formed of metallic magnesium, the present invention is not limited to this. That is, the magnesium fuel body 200 only needs to elute magnesium ions, and may be formed of an alloy containing magnesium or a magnesium compound. The same applies to the magnesium thin film 230 in the magnesium fuel body 210.

  Moreover, although the 1st magnesium fuel body 250 and the 2nd magnesium fuel body 260 were connected to the same reel and were wound in parallel with the direction perpendicular | vertical to a rotating shaft, it is not restricted to this. That is, the first magnesium fuel body 250 and the second magnesium fuel body 260 may be connected to different reels and wound. Alternatively, the first magnesium fuel body 250 and the second magnesium fuel body 260 may be connected to the same reel and wound around one another.

  Moreover, although the magnesium air battery 130 which concerns on Embodiment 4 was provided with two magnesium air batteries and connected them in series, it is not restricted to this. That is, three or more magnesium-air batteries may be provided and connected in series.

  Further, although one positive electrode is provided for each magnesium fuel body 200, the present invention is not limited to this. That is, two or more positive electrodes may be provided for each magnesium fuel body, and a plurality of positive electrodes may sandwich the magnesium fuel body. At this time, the magnesium fuel body 210 may include the magnesium thin film 230 and the transmission film 240 on both surfaces of the conductive film 220. If a plurality of positive electrodes are connected to each other, the magnesium-air batteries are connected in parallel, and the current to be extracted can be increased.

  Moreover, although Embodiment 3 was provided with the magnesium air battery 110 which concerns on Embodiment 2, it is not restricted to this. That is, the apparatus includes the magnesium-air battery 100 according to the first embodiment, and may include the magnesium fuel body 200 that is a magnesium thin film instead of the magnesium fuel body 210 formed of a film and metal magnesium. The same applies to the fourth embodiment.

  In addition, although the electronic apparatus 700 operates the driving device 720 when the remaining capacity of the secondary battery 710 is equal to or less than the threshold value, the present invention is not limited to this. In other words, the driving device 720 may be operated to charge the secondary battery 710 in accordance with the power consumption of the electronic device 700, for example, the usage state of the application.

  Moreover, although the drive device 720 was attached to the electronic device 700 and the magnesium air battery 100 was attached to the drive device 720, it is not restricted to this. That is, one or both of the driving device 720 and the magnesium air battery 100 may be disposed inside the electronic device 700.

  In addition, although the electronic device 700 includes the secondary battery 710 and the magnesium-air battery 100 charges the secondary battery 710, the invention is not limited thereto. That is, the electronic device 700 may be directly operated with the power supplied from the magnesium-air battery 100 without using the secondary battery 710.

  Further, regarding the method of using the magnesium-air battery described in the first embodiment as a power source of the electronic device 700 and the method of connecting the two magnesium-air batteries described in the fourth embodiment in series, the electrolytic solution is used as the battery body. The present invention can also be applied to a magnesium-air battery that does not have a mechanism for supplying the battery continuously.

100, 110, 120, 130 Magnesium-air battery 200, 210 Magnesium fuel body 220 Conductive film 230 Magnesium thin film 240 Transmission film 250 First magnesium fuel body 260 Second magnesium fuel body 300 Battery body 310 Positive electrode 320 Electrolyte holding Material 330 First battery main body 340 Second battery main body 400 Electrolytic solution 410 Electrolytic solution cup 420 Electrolytic solution supply pipe 500, 520 Supply reel 510, 530 Take-up reel 600 Case 610, 620, 630, 640, 650, 660 Guide 670 Conductor 700 Electronic device 710 Secondary battery 720 Drive device

Claims (12)

A magnesium fuel body containing magnesium;
A rotatable supply reel to which one end of the magnesium fuel body is connected and to which the magnesium fuel body before reaction is wound;
A rotatable take-up reel connected to the other end of the magnesium fuel body and winding up the magnesium fuel body after reaction;
A positive electrode having conductivity and supplying electrons to oxygen;
An electrolyte for exchanging ions between the positive electrode and the magnesium fuel body;
An electrolyte holding material that is impregnated and held with the electrolyte; and
An electrolyte bath containing the electrolyte solution;
An electrolyte solution supply pipe communicating with the electrolyte solution holding material and the electrolyte solution tank;
The magnesium fuel body has a portion stretched between the supply reel and the take-up reel,
The electrolyte solution holding material is disposed between the positive electrode and the stretched portion of the magnesium fuel body,
When the take-up reel winds up the magnesium fuel body after the reaction, the electrolytic solution is supplied from the electrolytic solution tank to the electrolytic solution holding material through the electrolytic solution supply pipe.
A magnesium-air battery characterized by that. The electrolyte tank comes into contact with the magnesium fuel body after the wound reaction,
When the take-up reel winds up the reacted magnesium fuel body, the wound-up reacted magnesium fuel body presses the electrolyte soot, deforms the electrolyte soot, and pushes out the electrolyte. Is supplied to the electrolyte solution holding material,
The magnesium-air battery according to claim 1. A supply device for supplying the electrolytic solution from the electrolytic solution tank to the electrolytic solution holding material;
When the take-up reel winds up the reacted magnesium fuel body, the supply device supplies the electrolyte from the electrolyte tank to the electrolyte holding material.
The magnesium-air battery according to claim 1. The magnesium fuel body is:
A conductive film having conductivity;
A magnesium thin film attached to the conductive film;
A permeable film that covers the magnesium thin film and transmits ions;
The magnesium-air battery according to any one of claims 1 to 3, wherein The magnesium fuel body is formed in a thin ribbon shape,
The magnesium-air battery according to any one of claims 1 to 4, wherein The magnesium fuel body is formed in a wire shape,
The magnesium-air battery according to any one of claims 1 to 4, wherein The positive electrode is formed of at least one of carbon, metal, and manganese oxide.
The magnesium-air battery according to any one of claims 1 to 6, characterized in that The magnesium fuel body, the positive electrode, and the electrolyte holding material are a first magnesium fuel body, a first positive electrode, and a first electrolyte holding material, respectively.
A first portion including magnesium, wound at one end connected to the supply reel, wound at the other end connected to the take-up reel, and stretched between the supply reel and the take-up reel. Second magnesium fuel body, a second positive electrode electrically connected to the first magnesium fuel body, having conductivity and supplying electrons to oxygen, and a first impregnated and held in the electrolyte. 2 electrolyte solution holding material,
The electrolyte exchanges ions between the second positive electrode and the second magnesium fuel body;
The electrolytic solution supply pipe communicates with the second electrolytic solution holding material and the electrolytic solution bowl,
The second electrolyte holding material is disposed between the second positive electrode and the stretched portion of the second magnesium fuel body,
When the take-up reel winds up the second magnesium fuel body after the reaction, the electrolyte is supplied from the electrolyte tank to the electrolyte holder through the electrolyte supply pipe.
The magnesium-air battery according to any one of claims 1 to 7, characterized in that The first positive electrode and the first electrolytic solution holding material, and the second electric positive electrode and the second electrolytic solution holding material are shifted in the direction in which the first magnesium fuel body is stretched. Arranged,
The magnesium-air battery according to claim 8. It is further equipped with a case that accommodates the whole,
The magnesium-air battery according to any one of claims 1 to 9, wherein A magnesium-air battery according to any one of claims 1 to 10,
An electronic device characterized by that. A driving device for rotating the take-up reel;
A rechargeable secondary battery,
When the remaining capacity of the secondary battery is less than or equal to a threshold value, the take-up reel is rotated to extract power from the magnesium-air battery, and the secondary battery is charged.
The electronic device according to claim 11, wherein

Images