JP2024012233A - Battery housing and battery device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery housing with which the entire battery device can be reduced in size and lightened in weight while a decrease in an electrolytic solution in an electrolyte layer is suppressed, and a battery device including the same.

SOLUTION: A battery housing 30 includes a partition wall 33 that partitions a first chamber 31 and a second chamber 32. A battery body 10 including a first electrode, a second electrode, and an electrolyte layer interposed between the first electrode and the second electrode is housed in the first chamber 31, and a moisture supply source 20, in which moisture is contained and evaporated to be diffused to the surroundings, is housed in the second chamber 32. The electrolyte layer includes a hygroscopic material with hygroscopic properties and an electrolytic solution contained in the hygroscopic material. The partition wall 33 allows humid air, which contains moisture evaporated from the moisture supply source 20, to pass from the second chamber 32 to the first chamber 31.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a battery casing and a battery device including the same.

In general, metal batteries are constructed by combining two types of metal electrodes with different ionization tendencies and an aqueous electrolyte solution (electrolyte solution). There is a problem that corrosion occurs. Further, if the electrodes are made of a flat metal plate, there is a problem that the weight increases and the cost increases.

Here, Patent Document 1 discloses an air battery device having an air battery in which an electrolyte is interposed between an air electrode, which is a positive electrode, and a negative electrode. This air battery device includes a first electrolyte tank having an air electrode and a negative electrode and holding an electrolyte, a second electrolyte tank provided outside the air battery, a first electrolyte tank and a second electrolyte tank. It includes a circulation path that connects the electrolyte tanks and a pump provided in the circulation path.

In the battery device of Patent Document 1, the electrolyte is continuously supplied to the first electrolyte tank by circulating the electrolyte, and precipitates are collected from the electrolyte in the second electrolyte tank. ing.

JP2018-078082A

Here, in a battery device having an electrolytic solution, if the electrolytic solution decreases due to evaporation or the like, the battery performance will be significantly reduced. On the other hand, in the battery device of Patent Document 1, the electrolytic solution is circulated and continues to be supplied to the first electrolytic solution tank, so the decrease in the electrolytic solution is suppressed.

However, since the battery device of Patent Document 1 requires equipment such as a circulation path for circulating the electrolyte, a pump, and a second electrolyte tank, it is difficult to make the entire battery device small and lightweight. is difficult.
Furthermore, in the battery device of Patent Document 1, the entire positive electrode and negative electrode are immersed in the electrolytic solution in the first electrolytic solution tank, so there are also problems with corrosion and longevity of the electrodes.

The present invention has been made in view of these points, and its main purpose is to provide a battery casing that can reduce the size and weight of the entire battery device while suppressing the reduction of electrolyte in the electrolyte layer. and to provide a battery device equipped with the same.

The battery casing according to the present invention is a battery casing that includes a partition wall section that partitions a first chamber and a second chamber, and the first chamber includes a first electrode, a second electrode, and a second electrode. A battery main body having one electrode and an electrolyte layer interposed between the second electrode is housed, and the second chamber houses a moisture supply source that contains moisture and causes the moisture to evaporate and dissipate to the surroundings. The electrolyte layer includes a hygroscopic material having hygroscopic properties and an electrolytic solution contained in the hygroscopic material, and the partition wall section directs humid air containing moisture evaporated from the moisture supply source to the moisture absorbing material. The liquid is passed from the second chamber to the first chamber.

Further, the battery device according to the present invention includes a battery body having a first electrode, a second electrode, an electrolyte layer interposed between the first electrode and the second electrode, and a battery body that contains water and evaporates from the water. and a casing that houses the battery main body and the moisture supply source, and the electrolyte layer includes a hygroscopic material having hygroscopicity and an electrolytic solution contained in the hygroscopic material. The casing partitions a first chamber accommodating the battery main body and a second chamber accommodating the moisture supply source, and also allows humid air containing moisture evaporated from the moisture supply source to flow. , has a partition wall portion that allows passage from the second chamber to the first chamber.

The electrolyte layer may be provided to cover the outer periphery of the second electrode, and the first electrode may be constituted by a metal wire wound in a coil around the outer periphery of the electrolyte layer.
The coiled metal wire is preferably wound at predetermined intervals.

The second electrode may be formed in a tubular shape. The electrolyte layer may have an extension extending beyond one end of the second electrode.

According to the present invention, it is possible to provide a battery casing that can reduce the size and weight of the entire battery device while suppressing a decrease in electrolyte in the electrolyte layer, and a battery device including the same.

FIG. 1 is an explanatory diagram showing the configuration of a battery main body in the first embodiment. FIG. 2 is an explanatory diagram schematically showing an enlarged battery main body in the first embodiment. FIG. 3 is a perspective view schematically showing the battery device in the first embodiment. FIG. 4 is an explanatory diagram showing an example in which unit cells of the battery body are connected in series. FIG. 5 is an explanatory diagram showing an example in which unit cells of the battery body are connected in parallel. FIG. 6 is an explanatory diagram schematically showing an enlarged battery main body in the second embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the present invention is not limited to the following embodiments.
《Embodiment 1》

FIG. 1 shows the configuration of a battery main body 10 according to the first embodiment, and FIG. 2 schematically shows the battery main body 10 in an enlarged manner. Further, FIG. 3 is a perspective view schematically showing the battery device 1 in the first embodiment.

As shown in FIG. 3, the battery device 1 includes a battery body 10, a moisture supply source 20, and a housing 30. In the first embodiment, an example in which the battery main body 10 is a metal battery (a metal battery whose positive electrode and negative electrode are metal electrodes) will be described.

As shown in FIGS. 1 and 2, the battery main body 10 includes a first electrode 11, a second electrode 12, and an electrolyte layer 13. Electrolyte layer 13 is interposed between first electrode 11 and second electrode 12 .

In the first embodiment, the first electrode 11 is made of copper, and the second electrode 12 is made of magnesium. The first electrode 11 may be made of a metal material other than copper. Further, the second electrode 12 may be made of other metal materials such as lithium, titanium, magnesium, zinc, brass, or aluminum (a metal material having a higher ionization tendency than the first electrode 11).

The second electrode 12 is formed, for example, in a circular tube shape. Note that the second electrode 12 may have a tubular shape other than a circular tube, such as a rectangular tube, for example, or may have a plate shape or a solid rod shape. When the second electrode 12 has a cylindrical shape, it is preferable that its diameter is, for example, 3 mm or more and 30 mm or less. The second electrode 12 is used depending on its purpose, but it is optimal that its diameter is, for example, 3 mm or more and 15 mm or less, and its thickness is 0.2 mm or more and 1 mm or less.

In addition, when the second electrode 12 is plate-shaped, it is optimal that its thickness is, for example, 0.2 mm or more and 10 mm or less. The plate-shaped second electrode 12 may have a square shape or a rectangular shape, but a rectangular shape can obtain slightly higher output.

The electrolyte layer 13 includes a hygroscopic material 14 having hygroscopic properties and an electrolytic solution 15 contained in the hygroscopic material 14 . With this configuration, the electrolyte layer 13 has hygroscopicity. The moisture absorbing material 14 can be made of paper such as Japanese paper, cloth, or the like. As the electrolytic solution 15, for example, an aqueous solution containing sodium chloride as an electrolyte can be applied.

As shown in FIG. 1, the electrolyte layer 13 is provided to cover the outer periphery of the second electrode 12. Further, the electrolyte layer 13 has an extending portion 13a extending outward (downward in FIG. 1) from one end (lower end in FIG. 1) of the second electrode 12. The other end (the upper end in FIG. 1) of the second electrode 12 is an exposed portion 12a exposed from the electrolyte layer 13. In this way, the electrolyte layer 13 has the extending portion 13a, so that the hygroscopicity of the electrolyte layer 13 can be increased.

The electrolyte layer 13 may be wound around the outer peripheral surface of the second electrode 12 in a plurality of layers. Thereby, it is possible to confine the electrolytic solution inside the stacked electrolyte layers 13 and suppress its outflow to the outside.

The first electrode 11 is constituted by a metal wire 11a wound around the outer periphery of the electrolyte layer 13 in a coil shape. The first electrode 11 in the first embodiment is a positive electrode, and is formed of, for example, a copper wire. Furthermore, other metal wires 11a may be used as the metal wire 11a, depending on the material of the second electrode 12.

Although the outer diameter of the metal wire 11a is not limited, it is suitably about 0.1 mm or more and 2 mm or less. Further, the outer diameter of the metal wire 11a is preferably about half the thickness of the second electrode 12, for example. This is because the decomposition (dissolution) speed of the metal wire 11a is slower than that of the second electrode 12, so that the deterioration rate of the second electrode 12 is equivalent to that of the second electrode 12.

As shown in FIGS. 1 and 2, the first electrode 11 is formed into a coil shape by winding a metal wire 11a around the outer periphery of the electrolyte layer 13 at predetermined intervals. As shown in FIG. 1, the metal wire 11a is wound around the outer peripheral surface of the electrolyte layer 13 in a region where the second electrode 12 and the electrolyte layer 13 overlap. The metal wire 11a is not wound around the extending portion 13a of the electrolyte layer 13.

When manufacturing the battery main body 10, for example, a cylindrical magnesium tube has an outer diameter of 6 mm, a thickness of 0.6 mm, and a length of 36 mm. The width of the paper serving as the moisture absorbing material 14 of the electrolyte layer 13 (width in the axial direction of the second electrode 12) is approximately 35 mm. The copper wire that is the metal wire 11a has a length that allows the magnesium tube that is the second electrode 12 and the electrolyte layer 13 to be wound about three times to several hundred times.

Then, the moisture-absorbing material 14 is soaked in a large amount of strong salt water (approximately 5 to 7%) and wrapped around the second electrode 12. At this time, by extending the moisture absorbent material 14 outward by about 5 mm from one end of the second electrode 12, the moisture absorbent material 14 is wrapped about 6 mm inward (center side) from the other end of the second electrode 12. As a result, an extended portion 13a of the electrolyte layer 13 is formed at one end of the second electrode 12, and an exposed portion 12a is formed at the other end of the second electrode 12.

The metal wires 11a wound around the electrolyte layer 13 are arranged at predetermined intervals, so that the electrolyte layer 13 is exposed between the metal wires 11a. Therefore, the electrolyte layer 13 easily absorbs moisture from the surroundings.

The number of times the metal wire 11a is wound around the second electrode 12 and the electrolyte layer 13 is preferably about 3 to several hundred times, but optimally about 13 to 50 times. Further, the direction in which the metal wire 11a is wound may be clockwise, but counterclockwise is preferable because higher output can be obtained. Incidentally, it is desirable that the same specifications be applied when the second electrode 12 has a flat plate shape.

Note that the metal wires 11a may be tightly packed and wound around each other without leaving any gaps. By doing so, it is possible to obtain the same effect as a single metal plate electrode. In this case, the metal wire 11a may be wrapped in double or triple layers.

As shown in FIG. 1, the second electrode 12 is provided with a current collector 17, and a wiring 18 is connected to the current collector 17. The current collector 17 can be provided, for example, on the exposed portion 12a of the second electrode 12. Further, a wiring 18 is connected to the metal wire 11a of the first electrode 11. In this way, the unit cell (one cell) 5 of the battery main body 10 is configured by the above-described configurations of the first electrode 11, the second electrode 12, and the electrolyte layer 13.

Then, in the battery body 10, the metal (magnesium) forming the second electrode 12 is ionized and generates electrons. Electrons generated at the second electrode 12 flow through the wiring 18 toward the first electrode 11, which is the positive electrode, as shown by arrow B in FIG. Then, discharge (battery reaction) by the battery main body 10 occurs.

The battery main body 10 can obtain a desired battery output by combining a plurality of unit cells 5 connected in series or in parallel. FIG. 4 shows an example in which unit cells 5 are connected in series. FIG. 5 shows an example in which unit cells are connected in parallel.

When unit cells 5 are connected in series, a wiring 18 is connected between the first electrode 11 (metal wire 11a) in one unit cell 5 and the second electrode 12 (for example, the current collector 17 of the exposed portion 12a) in the other unit cell 5. Connect via etc.

When connecting the unit cells 5 in parallel, the first electrodes 11 (metal wires 11a) of the unit cells 5 are connected to each other, and the second electrodes 12 of the unit cells 5 are connected to each other. At this time, the exposed portion 12a of the second electrode 12 in one unit cell 5 is inserted inside the extending portion 13a of the electrolyte layer 13 in the other unit cell 5, and the second electrodes 12 are connected to each other.

Next, the housing 30 and the moisture supply source 20 will be described with reference to FIG. 3. The housing 30 houses the battery body 10 and the moisture supply source 20 described above.
The moisture supply source 20 contains moisture and allows the moisture to evaporate and dissipate into the surroundings. The moisture supply source 20 includes a moisture absorber 21 made of a material that easily absorbs moisture, such as paper such as Japanese paper or sponge, and moisture 22 absorbed and retained by the moisture absorber 21.

The casing 30 has a partition wall 33 that partitions a first chamber 31 that accommodates the battery body 10 and a second chamber 32 that accommodates the moisture supply source 20. For example, the partition wall 33 divides the inside of the housing 30 into upper and lower sections, and the second chamber 32 is arranged below the first chamber 31 .

A plurality of through holes (not shown) are formed in the partition wall portion 33 . For example, the partition wall portion 33 may be formed of a net-like plate member. The partition wall 33 is configured to allow humid air containing moisture evaporated from the moisture supply source 20 to pass from the second chamber 32 to the first chamber 31.

The second chamber 32 is closed on the sides and the bottom by a side wall portion 32a and a bottom surface portion 32b, and allows humid air to pass through only from the partition wall portion 33 to the outside of the second chamber 32. On the other hand, the first chamber 31 has a relatively small vent 31a. For example, the casing 30 may have a configuration in which the side wall portion 31b closes the periphery, and a lid body 34 is provided at the top, and a plurality of ventilation holes 31a are formed through the lid body 34. good.

The vent hole 31a is configured to allow gas to pass through, but not to allow moisture to pass through. For example, the vent 31a may have a configuration in which a through hole formed in the lid body 34 is covered with Japanese paper or the like. In this manner, by providing the vent 31a, gas, hydrogen, etc. generated by the battery reaction in the first chamber 31 can be discharged to the outside of the casing 30 while suppressing a drop in moisture. Note that the vent 31a may be provided not only in the lid 34 but also in the side wall 31b.

With such a configuration, the inside of the housing 30 can be maintained at relatively high humidity. By containing, for example, about 50 cc of liquid in the moisture absorber 21 of the moisture supply source 20, it is possible to maintain the humidity inside the housing 30 at about 70% for six months or more. The liquid contained in the moisture absorber 21 is not particularly limited, but water such as tap water is sufficient.

As described above, the battery device 1 according to the first embodiment includes the casing 30 having the partition wall 33 that partitions the first chamber 31 and the second chamber 32. The battery body 10 is housed in the first chamber 31 of the housing 30, and the moisture supply source 20 is housed in the second chamber 32. Thus, the partition wall 33 is configured to allow humid air containing moisture evaporated from the moisture supply source 20 to pass from the second chamber 32 to the first chamber 31.

With this configuration, the casing 30 can supply moisture from the moisture supply source 20 to the battery main body 10 in the form of humid air. That is, the moisture in the humid air that has moved from the second chamber 32 to the first chamber 31 is absorbed by the electrolyte layer 13 of the battery body 10 . Thereby, it is possible to suppress a decrease in the amount of electrolyte in the electrolyte layer 13, and it is possible to appropriately maintain battery performance.

Here, in the first embodiment, the first electrode 11 is formed of a coiled metal wire 11a, and the metal wire 11a is wound around at predetermined intervals. As a result, the electrolyte layer 13 is exposed through the gaps between the metal wires 11a, so that the ability of the electrolyte layer 13 to absorb moisture from the surrounding humid air can be increased. Further, water droplets generated on the metal wires 11a when moist air comes into contact with the metal wires 11a can also be absorbed into the electrolyte layer 13 through the gaps between the metal wires 11a.

Further, since the electrolyte layer 13 is provided with the extended portion 13a so as to be largely exposed, the extended portion 13a can efficiently absorb moisture from the surrounding humid air. The absorbed moisture is supplied to the center of the electrolyte layer 13 as an electrolyte. Therefore, the electrolyte in the electrolyte layer 13 can be maintained appropriately.

Here, in the case 30 according to the first embodiment, the moisture from the moisture supply source 20 can be supplied to the battery main body 10 in the form of humid air. Therefore, equipment for forcibly supplying the electrolyte to the electrolyte layer 13 (for example, an electrolyte circulation path, a pump, an electrolyte tank, etc.) is not required, so the entire battery device 1 can be made smaller and lighter. Can be done.

Furthermore, in the first embodiment, since the first electrode 11 is made of the coiled metal wire 11a, it is possible to reduce the weight and material cost compared to a battery device in which the electrode is made of a general metal plate. can. Furthermore, since the metal electrode can be manufactured by wrapping the metal wire 11a around the electrolyte layer 13 and the second electrode 12, the manufacturing cost can also be reduced.
In this manner, according to the first embodiment, it is possible to reduce the size and weight of the entire battery device 1 while suppressing a decrease in the amount of electrolyte in the electrolyte layer 13.

Furthermore, in the first embodiment, the first electrode 11 and the second electrode 12 are in contact with the electrolyte layer 13 on one side, and the first electrode 11 and the second electrode 12 are not entirely immersed in the electrolyte solution. Therefore, corrosion of the current collector 17, etc. in each electrode 11, 12 can be suppressed, and decomposition of the metal electrode can also be suppressed. Therefore, the life performance of the battery device 1 can be improved.
《Embodiment 2》

In the first embodiment, an example in which the battery body 10 is a metal battery has been described, but the present invention is not limited to this, and the battery body 10 may be an air battery. Note that, hereinafter, descriptions of the same contents as in the first embodiment will be omitted.

FIG. 6 schematically shows an enlarged battery main body in the second embodiment. The battery device 1 in the second embodiment includes a battery main body 10, a moisture supply source 20, and a casing 30, as in the first embodiment. The battery body 10 has a first electrode 11, a second electrode 12, and an electrolyte layer 13. Electrolyte layer 13 is interposed between first electrode 11 and second electrode 12 .
The positive electrode and negative electrode are different from those in the first embodiment. The second electrode 12 in the second embodiment is a positive electrode, while the first electrode 11 is a negative electrode.

The second electrode 12 is an air electrode that uses oxygen as a positive electrode active material. The second electrode 12 is formed in a solid shape containing conductive particles such as activated carbon. The second electrode 12 is formed, for example, in a circular tube shape.

Although it is possible to use other carbon materials (for example, carbon black, graphite, etc.) for the conductive particles, in order to make it easier to take air into the second electrode 12, which is the air electrode, it is necessary to use porous materials. It is desirable to use activated carbon.

Further, the second electrode 12 may have a tubular shape other than a circular tube, such as a rectangular tube, or may have a plate shape or a solid rod shape. However, in order to facilitate the introduction of air into the second electrode 12, a tubular shape is preferable.

When the second electrode 12 has a cylindrical shape, it is preferable that its diameter is, for example, 3 mm or more and 30 mm or less. The diameter of the second electrode 12 is, for example, 3 mm or more and 15 mm or less, and the thickness is preferably 0.2 mm or more and 1 mm or less, although it is used depending on the application.

In addition, when the 2nd electrode 12 is plate-shaped, it is preferable that the thickness is 0.2 mm or more and 10 mm or less, for example. The plate-shaped second electrode 12 may have a square shape or a rectangular shape, but a rectangular shape can obtain slightly higher output.

The electrolyte layer 13 is the same as in the first embodiment, and includes a hygroscopic material 14 having hygroscopic properties and an electrolytic solution 15 contained in the hygroscopic material 14, and has hygroscopic properties. The moisture absorbing material 14 is made of paper such as Japanese paper, cloth, or the like. The electrolytic solution 15 contains, for example, sodium chloride as an electrolyte. Further, the electrolyte layer 13 has an extending portion 13a.

The first electrode 11 is constituted by a metal wire 11a coiled around the outer periphery of the electrolyte layer 13, as in the first embodiment. The metal wire 11a in the second embodiment is made of, for example, magnesium. Note that the metal wire 11a constituting the first electrode 11 may be formed of aluminum, since magnesium and aluminum are suitable for use in combination with activated carbon, which is a positive electrode. Although the outer diameter of the metal wire 11a is not limited, it is suitably about 0.1 mm or more and 2 mm or less.

Similar to the first embodiment, the metal wire 11a is wound around at predetermined intervals. This allows the electrolyte layer 13 to easily absorb moisture from the surroundings. The metal wire 11a is not wound around the extending portion 13a of the electrolyte layer 13. Note that the metal wires 11a may be tightly packed and wound around each other without leaving any gaps.

When manufacturing the battery main body 10, the moisture absorbing material 14 is soaked in a rich salt water (approximately 5 to 7%) and wrapped around the second electrode 12, as in the first embodiment. At this time, the moisture absorbing material 14 is extended outward by about 5 mm from one end of the second electrode 12 and wound about 6 mm inward (center side) from the other end of the second electrode 12 . This forms the extended portion 13a of the electrolyte layer 13 and the exposed portion 12a of the second electrode 12.

Similar to the first embodiment, a current collector 17 is provided on the exposed portion 12a of the second electrode 12, and a wiring 18 is connected to the current collector 17 (see FIG. 1). On the other hand, a wiring 18 is connected to the metal wire 11a of the first electrode 11.

Then, in the battery body 10, as shown by arrow A in FIG. 6, the electrolyte (sodium chloride) contained in the electrolytic solution 15 of the electrolyte layer 13 moves toward the first electrode 11, which is the negative electrode. Sodium chloride ionizes the metal (magnesium) forming the first electrode 11 and generates electrons.

Electrons generated at the first electrode 11 flow through the wiring 18 toward the second electrode 12, which is a positive electrode, as shown by arrow B in FIG. On the other hand, metal ions (magnesium ions) generated at the first electrode 11 move to the second electrode 12 through the electrolyte layer 13, as shown by arrow C in FIG. The magnesium ions that have reached the second electrode 12 travel within the second electrode 12 along the conductive particles (activated carbon) of the second electrode 12 . Then, oxygen in the air around the second electrode 12 receives electrons and reacts with the magnesium ions. In this way, discharge (battery reaction) by the battery main body 10 occurs.

In the second embodiment as well, a desired battery output can be obtained by connecting a plurality of unit cells 5 in series or in parallel in the same manner as in the first embodiment (see FIGS. 4 and 5).

Further, the housing 30 and the moisture supply source 20 in the second embodiment have the same configuration as in the first embodiment. That is, the casing 30 has a partition wall 33 that partitions a first chamber 31 that accommodates the battery body 10 and a second chamber 32 that accommodates the moisture supply source 20. The partition wall portion 33 allows humid air containing moisture evaporated from the moisture supply source 20 to pass from the second chamber 32 to the first chamber 31 .
The housing 30 has a lid 34 provided with a plurality of vents 31a. The vent hole 31a has a configuration that allows gas to pass through but prevents moisture from easily passing through.

With such a configuration, the inside of the housing 30 can be maintained at relatively high humidity. By containing, for example, about 50 cc of liquid in the moisture absorber 21 of the moisture supply source 20, it is possible to maintain the humidity inside the housing 30 at about 70% for six months or more. The liquid contained in the moisture absorber 21 may be, for example, water such as tap water.
Therefore, in the second embodiment, as in the first embodiment, the moisture from the moisture supply source 20 can be supplied to the battery body 10 in the form of humid air by the casing 30, so that the electrolyte in the electrolyte layer 13 can be prevented from decreasing. battery performance can be maintained appropriately.

Furthermore, since the first electrode 11 is formed of a coiled metal wire 11a and the metal wire 11a is wound around it at predetermined intervals, the ability of the electrolyte layer 13 to absorb moisture from the surrounding humid air can be increased. . Further, water droplets generated on the metal wires 11a when moist air comes into contact with the metal wires 11a can also be absorbed into the electrolyte layer 13 through the gaps between the metal wires 11a.

In addition, since the electrolyte layer 13 is provided with the extending portion 13a, moisture can be efficiently absorbed from the surrounding humid air. Therefore, the electrolytic solution in the electrolyte layer 13 can be suitably maintained.

Furthermore, by providing the casing 30, equipment for forcibly supplying the electrolytic solution to the electrolyte layer 13 is not required, so the entire battery device 1 can be made smaller and lighter. Moreover, since the first electrode 11 is made of the coiled metal wire 11a, it is possible to reduce the weight and material cost compared to a battery device in which the electrode is made of a general metal plate.

As described above, according to the second embodiment, as in the first embodiment, the entire battery device 1 can be made smaller and lighter while suppressing the decrease in the amount of electrolyte in the electrolyte layer 13.

Furthermore, since the first electrode 11 and the second electrode 12 are not configured to contact the electrolyte layer 13 on one side and the entire first electrode 11 and the second electrode 12 are immersed in the electrolyte, each electrode 11, Corrosion of the current collector 17 etc. in 12 can be suppressed, and decomposition of the metal electrode can also be suppressed. Therefore, the life performance of the battery device 1 can be improved.

As described above, the present invention is useful for battery casings and battery devices equipped with the same.

1 Battery device 10 Battery body 11 First electrode 11a Metal wire 12 Second electrode 13 Electrolyte layer 13a Extension portion 20 Moisture supply source 30 Housing 31 First chamber 32 Second chamber 33 Partition wall portion

Claims (6)

A battery casing comprising a partition partitioning a first chamber and a second chamber,
The first chamber houses a battery main body having a first electrode, a second electrode, and an electrolyte layer interposed between the first electrode and the second electrode,
The second chamber houses a moisture supply source that contains moisture and causes the moisture to evaporate and dissipate into the surroundings,
The electrolyte layer includes a hygroscopic material having hygroscopicity and an electrolytic solution contained in the hygroscopic material,
The partition wall portion is a battery casing that allows humid air containing moisture evaporated from the moisture supply source to pass from the second chamber to the first chamber. a battery body having a first electrode, a second electrode, and an electrolyte layer interposed between the first electrode and the second electrode;
a moisture supply source that contains moisture and evaporates the moisture and dissipates it to the surroundings;
A casing that accommodates the battery main body and the moisture supply source,
The electrolyte layer includes a hygroscopic material having hygroscopicity and an electrolytic solution contained in the hygroscopic material,
The casing partitions a first chamber that accommodates the battery body and a second chamber that accommodates the moisture supply source, and directs humid air containing moisture evaporated from the moisture supply source to the second chamber. A battery device, comprising a partition wall that allows passage from the battery to the first chamber. The battery device according to claim 2,
The electrolyte layer is provided so as to cover the outer periphery of the second electrode,
In the battery device, the first electrode is constituted by a metal wire coiled around the outer periphery of the electrolyte layer. The battery device according to claim 3,
In the battery device, the coiled metal wire is wound around at predetermined intervals. The battery device according to claim 2,
The battery device, wherein the second electrode is formed in a tubular shape. The battery device according to claim 2,
In the battery device, the electrolyte layer has an extension extending beyond one end of the second electrode.

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