JPH089737Y2 - Air battery assembly kit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an air battery, and more particularly to an air battery assembly kit suitable as a teaching material for learning the operating principle of a battery.

[Background of the Invention] Air batteries are lightweight, small, and have relatively excellent power characteristics, so
In recent years, it has attracted attention as a power source for model airplanes.

A conventional air battery is basically composed of a positive electrode, a negative electrode and an electrolytic solution, and in a normal form, it is necessary to keep the battery in a sealed state so that this electrolyte does not flow out of the air battery.

However, in the case where the battery has a sealed structure as described above, it is not possible to observe the battery structure from the outside. Therefore, the conventional air battery is not suitable for learning the operating principle of the air battery. Absent.

[Outline of device]

The present invention has been made in view of the above points,
It is an object of the present invention to provide an air battery assembly kit suitable as a teaching material for learning the operating principle of an air battery or the electromotive force generation principle by making the battery form an open structure that can be observed from the outside.

That is, the air battery assembly kit according to the present invention is
A battery case that has a ventilation window and is almost entirely open; a pair of positive and negative electrodes fixed in the battery case; and water absorption that can be sandwiched between the positive and negative electrodes to absorb and retain an electrolyte solution. The kit is characterized by being combined with a separator made of a material.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a plan view showing an example of an air battery assembly kit according to the present invention. In the case of this kit, a pair of battery cases 3 made of styrofoam and having a ventilation window 2 inside a case 1 for a kit, a positive electrode 4 and a negative electrode 5 are provided.
And a separator 6 made of a water-absorbing material capable of absorbing and holding the electrolytic solution sandwiched between the positive electrode and the negative electrode.

In this case, the negative electrode is made of a metal plate such as an aluminum plate or a magnesium plate. On the other hand, the positive electrode is formed by depositing a carbon material on one surface of a metal mesh of 330 to 340 mesh (made of a mesh that allows air to pass through) made of a metal such as nickel or copper. Has been done. Such a positive electrode can be formed, for example, by depositing a material containing petroleum-based graphite powder as a main component on one surface of the metal mesh plate. For example,
It can be produced by adding activated carbon to petroleum-based graphite powder, adding and mixing the polytetrafluoroethylene dispersion liquid, thinly applying the mixture onto the surface of the metal mesh, and heating the mixture. When the above carbon material is formed into a porous film on the surface of the metal mesh to form the positive electrode, it can be formed by a method such as electrostatic coating. Lead wires may be joined to one ends of the positive electrode and the negative electrode by soldering or the like.

Further, the separator 6 is made of a water-absorbing material such as glass paper which is not subjected to water repellent treatment, electrically insulates the positive electrode 4 and the negative electrode 5 from each other, and uses an electrolyte solution made of a KCl solution or a NaCl solution as a capillary tube. It is absorbed by a phenomenon and wets the electrode to enable an electrode reaction. In order to develop such a function, in addition to glass paper,
For example, a water absorbing material such as glass fiber or paper may be used.

In the kit according to the present invention, as shown in FIG. 1, a container 7 containing a raw material for an electrolytic solution such as potassium chloride and a motor 8a and a propeller 8b as a load device for confirming the generation of electricity. Combination of light bulbs
9a and its socket 9b may be provided. further,
As a fixing means for fixing each component, for example, an adhesive
10 may be provided as a component of the kit.

When actually assembling the air battery by the kit of the present invention, as shown in FIG. 2, first, the separator 6 is folded in two and the negative electrode 5 is sandwiched between them, and further the positive electrode 4 is folded in two and stacked on the outside. . In this case, the side of the positive electrode 4 to which the carbon material is attached is placed inside. In this way, a unit cell (unit of air battery) is formed. For example, two cells are produced, sandwiched in a pair of battery cases 3, and the outer peripheral portion of the case is fixed with an adhesive or the like to complete the battery. .

FIG. 3 is an external view showing an outline of the air battery 20 assembled in this way and its usage. As shown in the figure, the lead wires from each electrode of the air battery 20 that is connected to two unit cells and housed in the case are connected to the motor 8a equipped with the propeller 8b, and the electrolyte 7 (potassium chloride) is added. An electromotive force is generated by injecting the (solution) from the opening provided in the case, and this can be promptly confirmed by the rotation of the propeller.

Thus, in the above air battery, the separator 6
No electromotive force is generated before the electrolytic solution is supplied to, and electricity is generated at the same time when the electrolytic solution is supplied. As the electrode of such an air battery, first, the following reaction occurs at the positive electrode 4.

_{1 / 2O 2 + H 2 O} + 2e - → 2OH - _{or, O 2 + H 2 O +} 2e - → O 2 H - + OH - O 2 H - → OH - + 1 / 2O 2 On the other hand, if in the negative electrode 5 side using Mg alloy , The following reaction occurs.

^{Mg + 2OH - → MgO + H} 2 O + 2e - Mg + 2H 2 O → Mg (OH) 2 + H 2 ↑ ( side reaction) The above reaction is similar to that of an ordinary battery, connecting a load to the air cells, occurs on the negative electrode 5 e The e ⁻ reaches the positive electrode 4 via the load, and the electron e ⁻ disappears at the positive electrode 4 as described above. In this way, current flows from the positive electrode to the negative electrode via the load.

In the air battery having the above structure, an electromotive force of about 1 volt can be obtained depending on the concentration of the electrolyte solution.

As described above, according to the present invention, it is possible to assemble an air battery, which has conventionally been a sealed structure, in an almost open state, and the operating principle of the air battery or generation of electromotive force can be performed while the internal structure can be observed from the outside. It has an excellent effect that the principle can be easily understood.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an air battery assembling kit according to the present invention, FIG. 2 is a perspective view showing an assembly structure of an electrode part, and FIG. 3 is an outline of an assembled air battery and its usage. It is an external view. 3 ... Battery case, 4 ... Positive electrode, 5 ... Negative electrode, 6 ... Separator.

Claims (6)

[Scope of utility model registration request] 1. A battery case of a substantially open type having a ventilation window, a pair of a positive electrode and a negative electrode fixed in the battery case, sandwiched between the positive electrode and the negative electrode to absorb an electrolytic solution, and A kit for assembling an air battery, characterized in that a kit comprising a separator made of a water absorbent material that can be held is combined with a separator. 2. The air battery assembly according to claim 1, wherein the kit further comprises a load device for confirming generation of an electrolyte solution raw material and / or electricity contained in a container. kit. 3. The kit for assembling an air battery according to claim 1, wherein the kit further comprises fixing means for fixing each component and / or conductive means for electrical connection. 4. The kit for assembling an air battery according to claim 1, wherein the positive electrode comprises a metal mesh plate coated with a carbon material on one surface thereof. 5. The air battery assembly kit according to claim 1, wherein the negative electrode is made of a metal plate. 6. The air battery assembling kit according to claim 1, comprising a plurality of electrode pairs including the positive electrode and the negative electrode.