JP3204092U - Air battery unit - Google Patents

Abstract

An air battery unit is provided which facilitates a reduction in size and weight of a spacer formed of a foldable sheet. An air battery unit includes a spacer disposed in an outer box, and the spacer is formed of a bendable sheet material. The spacers 50 are provided in the gaps between the plurality of bent portions 62 and the plurality of bent portions 62 that are bent inwardly toward the plurality of air cells 10, and are mutually attached when the bent portions 62 are bent inward. A pair of projecting portions 65 projecting from the approaching portion and projecting ends abutting each other are provided. [Selection] Figure 5

Description

  The present invention relates to an air battery unit including an outer box that houses a plurality of air batteries and a spacer.

An air battery unit including an outer box that houses a plurality of air batteries and a spacer disposed in the outer box is known (see, for example, Patent Document 1). This spacer is made of corrugated cardboard (made of paper), and includes two pockets (battery accommodating portions) that can accommodate air batteries.
More specifically, the spacer is formed by bending a sheet of corrugated cardboard, and an upper surface connection portion is disposed at the center of the cardboard paper, and an inner side surface portion is provided at each end of the upper surface connection portion. Is arranged, the bottom surface portion is connected to the inner side surface portion, the outer side surface portion is connected to the bottom surface portion, and has six rectangular surfaces. This corrugated paper is folded at the boundary of each surface, so that the outer side surface and the inner side surface facing each other through the bottom surface are held in parallel, and the portion surrounded by the outer side surface and the inner side surface is a pocket. Configure. The expansion of the air battery is suppressed by these pockets, and the gap between the air batteries can be secured by the gap between the pockets.

Japanese Patent No. 5690443

By the way, if this type of spacer can be reduced in size and weight, the air battery unit can be reduced in size and weight. If the air battery unit can be reduced in size and weight, it is easy to secure a storage space for the air battery unit, and various advantages such as improved portability of the air battery unit can be obtained.
Accordingly, an object of the present invention is to make the spacer formed of a foldable sheet easy to reduce in size and weight.

  In order to achieve the above object, the present invention provides an air battery unit including an outer box that houses one or a plurality of air batteries, and a spacer disposed in the outer box, the spacer being foldable. And a plurality of bent portions that are bent inwardly toward the space between the plurality of air cells, and are provided in gaps between the plurality of bent portions, and the bent portions are bent inwardly. A pair of projecting portions projecting from portions approaching each other and projecting ends abutting each other.

  In the above-described configuration, the plurality of bent portions may contact the air battery with a space therebetween, and the pair of projecting portions may be provided between the bent portions.

  Moreover, the said structure WHEREIN: Either of a pair of said protrusion part may straddle the corner | angular part of the said spacer.

  In the above configuration, an intake port for taking in outside air may be provided at a lower portion of the spacer, and an exhaust port for discharging internal air may be provided at the upper portion of the spacer.

  Further, in the above configuration, the outer side has a bent part on the outer box side that opens outward and opens the intake port, and the spacer is bent to come into contact with the end of the air cell. A bent piece may be provided, and a part of the outer box side bent piece may be bent so as to press the spacer side bent piece against the outermost air cell.

  In the above configuration, a sheet material containing paper may be used as the sheet material.

  In the present invention, the spacer disposed in the outer box of the air battery unit is formed of a foldable sheet material, and a plurality of bent portions that are bent inwardly toward a plurality of air batteries, Provided with a pair of projecting portions projecting from portions approaching each other when the folded portion is folded inward, and projecting ends abutting each other. It becomes easy to reduce the size and weight of the spacer.

1 is a perspective view of an air battery unit according to an embodiment of the present invention. It is a top view of an air battery unit. It is a perspective view of the stored thing accommodated in the box of an air battery unit. It is a front view of an air battery. It is a perspective view of the spacer of the air battery unit concerning the embodiment of the present invention. It is the figure which looked at the spacer which concerns on embodiment of this invention from the different direction, (A) is a front view, (B) is a left view, (C) is a top view, (D) is a right view, (E ) Is a bottom view. It is an expanded view of the spacer which concerns on embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of an air battery unit 1 according to the embodiment, and FIG. 2 is a top view. In each figure, the symbol UP indicates the upward direction, and the symbol RH indicates the right direction. Each direction may change depending on the arrangement state of the air battery unit 1.
The air battery unit 1 includes an outer box 2 that houses a plurality of air batteries 10 (FIG. 4 and the like to be described later), and functions as a power source that supplies power generated by the air batteries 10 to a power utilization device (not shown). Also called a pack.
The outer box 2 is integrally formed with a bottomed box-shaped box 3 that is formed by bending one cardboard and opens upward, and a lid 4 that serves as a lid so that the upper opening of the box 3 can be opened and closed. . The box 3 includes a rectangular bottom portion 3A constituting the bottom surface and side portions (long side side portions 3B, short sides) constituting four side surfaces extending upward from the four sides (long side, short side) around the bottom portion 3A. Side 3C). The lid portion 4 is foldably provided at one upper edge of the pair of long side portions 3B.

In addition, an inner lid portion 5 serving as an inner lid that covers an internal storage item (including the air battery 10) from above is foldably provided on one upper side of the pair of short side portions 3C.
Here, in FIG. 3, the perspective view of the storage thing (the air battery 10 and the spacer 50) accommodated in the box 3 is shown. These stored items will be described later.
The lid portion 4 and the inner lid portion 5 are respectively provided with exhaust ports 4A and 5A for extracting the air inside, and the inner lid portion 5 is further provided for injecting an electrolyte into the air battery 10. The liquid injection opening 5B is provided. The exhaust port 4A of the lid 4 is formed by bending a part of the lid 4 downward. For this reason, in the state which is not bent, there is no opening part in the cover part 4, the penetration | invasion of the dust etc. to the inside of the outer case 2 is suppressed, and long-term storage is attained.

  Steps are formed in the middle lid portion 5 by bending, and wires 13H and 15H (FIG. 4) extending from the air battery 10 are routed inside the relatively high region 5H, and these wires are connected in series. To the outside and connected to the DC / DC converter 90. The DC / DC converter 90 can be stored in a space between a relatively low region of the inner lid and the lid portion.

As shown in FIG. 3, the storage item includes three air batteries 10 arranged side by side, and cardboard spacers 50 that restrict the movement of the air batteries 10.
FIG. 4 is a front view of the air battery 10.
The air battery 10 includes a hollow box-shaped exterior body 11 formed by folding and folding a single sheet material that can be bent, joining the left and right side edges, and bending the sheet material. The air electrode 13 is disposed on the front wall portion 22 of the exterior body 11, and the metal electrode 15 is disposed in the exterior body 11 so as to face the air electrode 13.

  The exterior body 11 is formed in a thin rectangular parallelepiped shape. That is, the exterior body 11 includes a bottom plate portion 21 that constitutes a bottom surface of the exterior body 11, a front wall portion 22 that constitutes a front surface, a rear wall portion 23 (FIG. 3) that constitutes a rear surface, and left and right sides that constitute left and right side surfaces. Side wall portions (left wall portion, right wall portion) 24 and an upper plate portion 25 constituting the upper surface are integrally provided. The front wall portion 22 and the rear wall portion 23 are identically shaped surfaces (laterally long surfaces) that are longer in the left-right direction than the up-down direction, are arranged in parallel to each other, and constitute the largest surface in the exterior body 11. ing.

  The air electrode 13 has a structure in which a catalyst sheet is pressed (pressed) from both sides to a copper mesh (metal mesh) that functions as a current collector, and is sandwiched between. Air permeability and water permeability (corresponding to water permeability) And have. The catalyst sheet is a material that is a mixture of carbon and Teflon (registered trademark), formed into a sheet with a predetermined thickness using a roller press, etc., and then dried and fired at a predetermined temperature for a predetermined time. It is a sheet cut to the size of. The air electrode 13 is attached to the front wall portion 22 by heat fusion or an adhesive so as to cover the opening 22K provided in the front wall portion 22. The air electrode 13 is not limited to the above-described configuration, and a known configuration can be widely applied.

  The sheet material forming the exterior body 11 is a sheet material containing paper, and paper having at least an inner surface laminated with a heat-fusible resin (for example, polyethylene (PE)), that is, laminated paper is used. For this reason, the inner surface side is formed so as not to be liquid-permeable, the electrolytic solution does not ooze out (leak), and is lighter and cheaper than when a metal can or a resin container is used. Moreover, since the heat-fusible resin is used, each part of the exterior body 11 can be joined by heat-sealing. In addition, you may use the double-sided laminated paper which laminated the front and back both surfaces of the sheet | seat material.

The metal electrode 15 is arranged in parallel with the air electrode 13, and each electrode plate (the metal electrode 15 and the air electrode 13) is arranged in the vertical direction when the battery is used. A magnesium alloy is used for the metal electrode 15, and an aqueous electrolyte such as a sodium chloride aqueous solution is used for the electrolyte. Further, a bag body containing sodium chloride as an electrolyte may be arranged in advance inside the exterior body 11, and power may be generated simply by adding water such as tap water.
The metal electrode 15 can be made of a metal such as zinc, iron, or aluminum, or an alloy thereof. When zinc is used for the metal electrode 15, an aqueous potassium hydroxide solution may be used as the electrolytic solution. When iron is used for the metal electrode 15, an alkaline aqueous solution may be used as the electrolytic solution. . Further, when aluminum is used for the metal electrode 15, an electrolytic solution containing sodium hydroxide or potassium hydroxide may be used. In FIG. 4, the symbol UL is the liquid level of the electrolytic solution.

  A wiring (positive electrode wiring) 13H is connected to the air electrode 13 using a crimping fitting 13K. The metal electrode 15 integrally has left and right tab portions 15A1 extending upward, and at least one of the tab portions 15A1 is connected to a wiring (negative electrode wiring) 15H using a not-shown crimp fitting (same as the above-described crimp fitting 13K). Is connected.

FIG. 5 is a perspective view of the spacer 50. 6 is a view of the spacer 50 as seen from different directions, FIG. 6 (A) is a front view, FIG. 6 (B) is a left side view, FIG. 6 (C) is a top view, and FIG. 6 (D). Is a right side view, and FIG. 6E is a bottom view. For easy understanding, FIG. 5 shows a state where one air battery 10 is arranged.
The spacer 50 includes a substantially rectangular bottom surface portion 51 constituting the bottom surface, two side surface portions 52 extending upward from a pair of short sides of the bottom surface portion 51, and an upper surface portion bent from the upper edge of each side surface portion 52. 53 as a single unit.

  The spacer 50 is manufactured by bending one cardboard. This corrugated cardboard is manufactured by punching a corrugated cardboard sheet as a raw material with a punching machine, and is hereinafter referred to as a sheet material 100. Note that the sheet material 100 is not limited to corrugated cardboard, and can be widely applied to a sheet other than corrugated cardboard. For example, a thick paper, a thin resin sheet, or a laminated paper obtained by laminating one side or both sides with PE may be used. When laminated paper is used, absorption of moisture in the air can be suppressed.

FIG. 7 is a development view of the spacer 50 (a view of the sheet material 100). In FIG. 7, the bent portion is indicated by a one-dot chain line.
The sheet material 100 includes a bottom surface portion 51, a pair of side surface portions 52 connected to opposing sides of the bottom surface portion 51 (left side 51A and right side 51B shown in FIG. 7), and the remaining opposing sides (see FIG. 7). A pair of bent pieces 54 connected to a front side 51C and a rear side 51D). Furthermore, the sheet material 100 includes a pair of upper surface portions 53 that are continuous with the side opposite to the bottom surface portion 51 in each side surface portion.
As shown in FIG. 6, the bottom surface portion 51, the pair of side surface portions 52, and the pair of top surface portions 53 are a plurality (three in this example) extending linearly in the direction in which they are continuous (the α direction shown in FIG. 7). The continuous part 61 is provided. These continuous portions 61 are provided with a gap in a direction perpendicular to the α direction (β direction shown in FIG. 7), and the adjacent continuous portions 61 are connected to each other by a bent portion 62 that functions as a connecting portion.

The continuous portion 61 is formed in a shape obtained by dividing the bottom surface portion 51, the pair of side surface portions 52, and the pair of upper surface portions 53 in the β direction, that is, a shape divided into three. That is, when the continuous portions 61 are brought close to each other, the bottom surface portion 51, the pair of side surface portions 52, and the pair of top surface portions 53 are formed.
The bent portions 62 are provided with a gap in the direction in which the continuous portion 61 extends (direction α). In this embodiment, three bent portions 62 are provided on the bottom surface portion 51, two are provided on the side surface portion 52, and one is provided on the upper surface portion 53. It is provided one by one.

These bent portions 62 bend inward when the continuous portions 61 are brought close to each other in the β direction. More specifically, the bent portion 62 is formed by integrating a pair of base end side bent pieces 62A that are bent inward from the adjacent continuous portions 61 and a front end piece 62B that connects the tip ends of the pair of base end side bent pieces 62A. Prepare for. The pair of base end side folded pieces 62A is formed in a trapezoidal shape that becomes narrower as it goes to the distal end, and the distal end piece 62B is formed in a rectangular shape that connects between the distal ends of the base end side folded pieces 62A.
By bringing the continuous portions 61 close to each other in the β direction, as shown in FIG. 5, the pair of base end side bent pieces 62A bend inward, and the pair of base end side bent pieces 62A correspond to the tip piece 62B. Facing each other with a gap. Thereby, a pair of base end side bending piece 62A and front-end | tip piece 62B form the part of the concave cross-sectional shape dented inside.

In this case, the proximal-side folded pieces 62A of the bent portions 62 abut against predetermined surfaces (the front wall portion 22 or the rear wall portion 23) of the exterior body 11 of the air battery 10 disposed in the spacer 50. The tip piece 62 </ b> B of the bent portion 62 ensures a separation distance between the exterior bodies 11 of the air battery 10. Therefore, the air cell 10 can be positioned in the front-rear direction by these bent portions 62, and the distance between adjacent air cells 10 is set by the thickness of the bent portion 62 (corresponding to the width of the tip piece). can do.
The air battery 10 is positioned in the left-right direction when the ears 11 </ b> M protruding vertically from the left and right side wall parts 24 come into contact with the continuous part 61 of the spacer 50. In this way, the air battery 10 is positioned front and rear and left and right by the spacer 50.

Since a gap is formed between the adjacent bent portions 62, air from the outside can be easily taken into the gap between the air batteries 10. As a result, air can be supplied from outside to the air battery 10, air can be taken into the air electrode 13, and heat of the air battery 10 can be released.
In this embodiment, as shown in FIGS. 5 and 7, the three bent portions 62 provided on the bottom surface portion 51 of the spacer 50 are formed to have a narrower width (length in the α direction) than the other bent portions 62. Has been. As a result, a wide gap between the bent portions 62 in the bottom surface portion 51 can be ensured, and the outside air can be efficiently introduced into the lower portion of the spacer 50.

In addition, as shown in FIG. 5, these bent portions 62 abut only on a region outside the opening 11 </ b> K covered with the air electrode 13. Therefore, the substantially functioning area (reaction area) of the air electrode 13 is not reduced.
Further, since the bent portion 62 has a concave cross section with a high section modulus, the bent portion 62 can reinforce the bottom surface portion 51, the pair of side surface portions 52, and the pair of upper surface portions 53. Strength can be increased efficiently.

By the way, when the spacer 50 is formed as described above, the strength of the continuous portion 61 extending relatively long in a planar shape tends to be low.
Therefore, in the present embodiment, the protruding ends abut against each other in the gaps between the bent portions 62 in the sheet material 100 and protrude from the portions (edge portions of the continuous portion 61) that approach each other when the bent portion 62 is bent inward. A pair of protrusions 65 are provided.
The pair of projecting portions 65 are provided over the entire portion of the continuous portion 61 excluding the proximal end side bent piece 62A. For this reason, the width (length in the β direction) of the continuous portion 61 is increased by the amount of the protruding portion 65, and the strength of the continuous portion 61 can be increased.

Further, as shown in FIGS. 5 and 6B to 6E, the pair of protrusions 65 abut against each other when the spacer 50 is assembled. Thereby, the location where the protrusions 65 are in contact with each other has a shape in which the plurality of continuous portions 61 are continuous without gaps, and this also facilitates increasing the strength of the spacer 50.
In addition, when the bent portion 62 is bent with the continuous portions 61 brought close to each other in the β direction, the protruding portion 65 comes into contact with the bent portion 62 and further bending is restricted. Thereby, the situation where the bending part 62 bends at an angle more than a right angle can be avoided. Therefore, each part of the bent part 62 can be bent at a predetermined angle (right angle).

Further, the pair of projecting portions 65 are provided in a region corresponding to the corner portion of the spacer 50. More specifically, the pair of projecting portions 65 includes a region straddling the bottom surface portion 51 and the pair of side surface portions 52 of the spacer 50 and a region straddling the pair of side surface portions 52 and the pair of top surface portions 53. Also provided. Therefore, all the corners of the spacer 50 can be reinforced, and the strength of the spacer 50 can be increased more effectively.
Here, as shown in FIG. 5, an opening 67 that communicates the inside and outside of the spacer 50 is formed at a location corresponding to the bent portion 62 of the spacer 50. These openings 67 facilitate air to flow inside and outside the spacer 50. In this embodiment, when the spacer 50 is inserted into the outer box 2, the upper opening 67 (67A in the figure) functions as a spacer exhaust port that exhausts the air in the spacer 50 upward. Air from the mouth is discharged to the outside through the middle lid 5 and the exhaust ports 5A and 4A of the lid 4.

  As shown in FIGS. 5 and 7, etc., the pair of upper surface portions 53 are provided with openings 68 communicating with the liquid injection port and the air circulation port provided in the upper plate portion 25 of the air battery 10, One opening 68 communicates with the liquid injection opening 5 </ b> B (FIGS. 1 and 2) of the inner lid 4. Thereby, it is possible to inject liquid from the outside with the inner lid portion 4 closed.

Next, the pair of bent pieces 54 connected to the bottom surface portion 51 of the spacer 50 will be described.
As shown in FIG. 5, the pair of bent pieces 54 are bent at a right angle from the bottom surface portion 51 and erected substantially vertically, and the outer surfaces (rear wall portion 23) of the air cell 10 disposed at both ends of the spacer 50. ). In the state where the spacer 50 is put in the outer box 2, the opening of the pair of bent pieces 54 is described in the outer box 2, so that the expansion of the outer surface (rear wall portion 23) of the air battery 10 is restricted by the bent pieces 54. Is done.

These bent pieces 54 are provided with an air inlet 54A (FIG. 5) for taking outside air into the lower portion of the spacer 50. As shown in FIG. 1, a pair of outer box side bent pieces 7 that open outward and open the air inlet 54 </ b> A of the spacer 50 are integrally formed at the lower part of the side part (long side part 3 </ b> B) of the outer box 2. Provided. Accordingly, external air can be introduced into the spacer 50 through the intake port 54A.
Moreover, the outer box side bending piece 7 functions as a foot part that suppresses the falling of the outer box 2, and can make the outer box 2 difficult to fall.

  Further, as shown in FIG. 1, the outer box-type bent piece 7 is configured to be foldable so that both end portions 7 </ b> A are bent upward. More specifically, as shown in FIG. 2, both end portions 7A are bent with reference to an oblique boundary 7K as viewed from above so as to be closer to the spacer 50 toward the upper end. In this case, the upper ends of both end portions 7A are in contact with the bent piece 54 of the spacer 50 and press the bent piece 54 against the air battery 10 side. Thereby, the expansion of the air battery 10 at both ends can be more effectively suppressed.

Thus, in this embodiment, each part of the spacer 50 can be reinforced by the pair of protrusions 65, and the strength of the spacer 50 can be increased efficiently. Since the strength of the spacer 50 can be increased efficiently, sufficient strength can be secured even if a thin cardboard (for example, a thickness of 1.5 mm) is used for the sheet material 100 forming the spacer 50, and the spacer 50 can be downsized. In addition, the weight can be reduced.
In the conventional spacer (the spacer described in Japanese Patent No. 5690443), the upper surface connection portion is disposed at the center portion, the inner side surface portions are disposed at both ends of the upper surface connection portion, and the bottom surface portion is disposed at the inner side surface portion. It is formed of a single cardboard having six rectangular surfaces connected to the bottom surface portion and connected to the outer side surface portion. On the other hand, the spacer 50 of the present embodiment is formed of a single cardboard having five surfaces including a bottom surface portion 51, a pair of side surface portions 52, and a pair of top surface portions 53. Therefore, the area required for the spacer 50 can be reduced, which is advantageous for reduction in size and weight.

Further, the corrugated cardboard used in the spacer 50 of the present embodiment is a corrugated cardboard (so-called double-sided cardboard) having a corrugated core (also referred to as corrugated cardboard). For this reason, it is thinner than a corrugated cardboard having a plurality of corrugated cores (so-called double-sided cardboard), which is advantageous for downsizing and lightening.
In general, it is known that corrugated cardboard is relatively hard to bend in a direction perpendicular to the wave direction of the center of the corrugation (the direction in which the hollow is flowing). The spacer 50 of the present embodiment is configured to be resistant to a load along the stacking direction (alignment direction, α direction) of the air cells 10 by setting the direction of the center wave to the β direction in FIG. 7. This also enables the spacer 50 to be reduced in size and weight.

As described above, the air battery unit 1 of the present embodiment includes the spacer 50 disposed in the outer box 2, and the spacer 50 is formed of a foldable sheet material. The spacer 50 protrudes from a plurality of bent portions 62 that are bent inwardly toward the plurality of air cells 10, and between the bent portions 62 from portions that approach each other when the bent portion 62 is bent inward. And a pair of protrusions 65 that come into contact with each other.
With this configuration, the bent portion 62 can secure a gap between the air cells 10 and can position the air cell 10, and a region between the bent portions 62 in the spacer 50 can be reinforced by the pair of protrusions 65. .
Thereby, the strength of the spacer 50 can be effectively increased, and the spacer 50 can be reduced in size and weight by reducing the thickness of the sheet material 100 forming the spacer 50 accordingly. Therefore, the size and weight of the entire air battery unit 1 can be reduced by reducing the size and weight of the spacer 50.

Further, the plurality of bent portions 62 abut against the air battery 10 with a space therebetween, and a pair of protrusions 65 are provided between the bent portions 62, so that the air battery 10 is exposed between the bent portions 52. The air battery 10 can easily dissipate heat.
In addition, since any one of the pair of protruding portions 65 is provided at a position corresponding to the corner portion of the spacer 50, the strength of the spacer 50 can be effectively increased.

  Further, the lower portion of the spacer 50 has an intake port 54A for taking in outside air, and the upper portion of the spacer 50 has an opening 67A that functions as an exhaust port for discharging the internal air. Thereby, outside air can be introduced into the inside from the lower part of the spacer 50, can flow between the air cells 10 in the spacer 50, and can be exhausted from the upper opening 67 </ b> A. Therefore, it is possible to effectively exhaust heat by using the rising airflow due to the heat of the air battery 10.

Furthermore, the outer box 2 has an outer box side bent piece 7 that opens outward and opens the air inlet 54A of the spacer 50 at the lower part of the outer box 2, and the spacer 50 is a bent piece that is bent so as to contact the air cell 10 at the end. 54 (spacer side bent piece). A part of the outer box side bent piece 54 is configured to be bent so as to press the bent piece 54 against the air battery 10 at the end.
Thereby, the expansion | swelling of the air battery 10 can be suppressed effectively. Moreover, the outer box side bending piece 7 functions as a foot part of the outer box 2, and can make the outer box 2 difficult to fall.

  Further, since a sheet material containing paper is used for the sheet material 100 forming the spacer 50, the spacer 50 can be manufactured by bending the sheet material 100, and it is advantageous for reducing the weight of the spacer 50. In addition, it can be discarded as paper waste after use.

In addition, this invention is not limited to the above-mentioned embodiment, A various deformation | transformation and change are possible based on the technical idea of this invention. For example, in the above-described embodiment, the case where the spacer is configured to accommodate three air batteries has been described. However, the configuration is not limited to this, and may be two or four or more.
Moreover, the air battery 10 accommodated in the air battery unit 1 is not limited to a configuration in which the exterior body 11 is formed of a sheet material containing paper. For example, the exterior body 11 of the air battery 10 may be a resin sheet material. . Moreover, the air battery 10 may not be the exterior body 11 formed with the sheet | seat material which expand | swells. By using the spacer 50 or the like for the air battery 10 made of various materials, there can be obtained an advantage that each air battery 10 can be positioned and each air battery 10 can be easily air-cooled.

DESCRIPTION OF SYMBOLS 1 Air battery unit 2 Outer box 7 Outer box side bending piece 10 Air battery 11 Exterior body 50 Spacer 54 Bending piece (spacer side bending piece)
54A Intake port 62 Bent part 65 Projection part 100 Sheet material

Claims (6)

An air battery unit comprising an outer box containing a plurality of air batteries, and a spacer disposed in the outer box,
The spacer is formed of a foldable sheet material,
A plurality of bent portions that are bent inwardly toward the plurality of air cells; and provided in a gap between the plurality of bent portions, and protrudes from portions approaching each other when the bent portions are bent inward. A pair of protrusions whose ends abut each other;
An air battery unit comprising:   2. The air battery unit according to claim 1, wherein the plurality of bent portions are in contact with the air battery with a space therebetween, and the pair of projecting portions are provided between the bent portions.   3. The air battery unit according to claim 2, wherein any one of the pair of projecting portions straddles a corner portion of the spacer.   4. The air inlet according to claim 1, wherein an air inlet for taking in outside air is provided at a lower part of the spacer, and an air outlet for discharging internal air is provided at an upper part of the spacer. 5. Air battery unit. At the bottom of the outer box, it has an outer box side bent piece that opens to the outside and opens the intake port,
The spacer has a spacer-side bent piece that is bent so as to contact the air battery at the end.
5. The air battery unit according to claim 4, wherein a part of the outer box side bent piece is freely foldable so as to press the spacer side bent piece against the endmost air battery.   The air battery unit according to any one of claims 1 to 5, wherein a sheet material containing paper is used as the sheet material.

Images