Air battery package and air battery

Abstract

To provide a package for an air cell, enabling prevention of self-discharge phenomenon, passivation of a negative electrode and evaporation of electrolytic solution before use, and thereby enabling extension of the usable life of the air cell, and to provide an air cell.SOLUTION: A package 12 for an air cell 1 includes: a container-like exterior including a gas permeable region 14 and a gas impermeable region 16 having a gas permeability coefficient smaller than that of the gas permeable region; an electrode assembly housing portion that can house an electrode assembly of the air cell defined in the exterior; and an electrolytic solution housing portion 18 that defines a space separated from the electrode assembly housing portion, which is defined in the electrode assembly housing portion and can house the electrolytic solution, and when an electrode assembly is housed, at least a part of the gas permeable region is arranged at a position where the part overlaps a positive electrode 4 in a plan view, and the electrolytic solution housing portion includes an opening 20 that opens according to external force applied from the outside of the exterior and can discharge the electrolyte into the electrode assembly housing portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a package for an air battery and an air battery. [Background technology]

[0002] The demand for various portable electronic devices such as mobile phones, tablet computers, and wearable devices is expected to continue to increase in the future. Furthermore, as the so-called "Internet of Things (IoT)" develops rapidly, it is predicted that various electronic devices will be placed in our daily lives.

[0003] Lithium-ion batteries are currently the mainstream energy source for such electronic devices. Lithium-ion batteries are characterized by their light weight and high energy density, but they have problems such as the high reactivity of lithium and its scarcity.

[0004] Air batteries have been proposed as a technology that overcomes the problems of lithium-ion batteries and further improves battery characteristics. Air batteries use a metal material as the negative electrode active material and oxygen in the air as the positive electrode active material. The positive and negative electrodes of the air battery are enclosed together with an electrolyte in a package having an oxygen permeable region that can take in oxygen from the air to the positive electrode. Air batteries have an energy density far exceeding that of lithium-ion batteries, and can use more common, inexpensive and safe metal materials such as aluminum and zinc as the negative electrode material in addition to lithium. Furthermore, since air batteries use oxygen in the air as the positive electrode active material, the air battery itself does not contain a positive electrode active material. Therefore, air batteries have the advantage that they can be easily miniaturized and lightweight compared to lithium-ion batteries and the like. Therefore, air batteries are considered to be a mainstream technology in the future.

[0005] As mentioned above, air batteries use oxygen in the air as the positive electrode active material, so the package must be structured to take in oxygen from the air. For example, Patent Documents 1 and 2 propose a package structure with air holes.

[0006] A conventional air battery will be described with reference to FIG. 7 showing a cross-sectional view and FIG. 8 showing a plan view. The conventional air battery 100 includes an anode 102, an air electrode or cathode 104, a separator 106, and a package 112 enclosing them. The anode 102, the cathode 104, and the separator 106 are immersed in an electrolyte 110. The anode 102 includes a metal material such as lithium, aluminum, zinc, magnesium, calcium, sodium, or an alloy thereof as an anode active material. The separator 106 is made of a sheet of a porous insulating material that prevents contact between the anode 102 and the cathode 104 while allowing the electrolyte 110 to pass through. The cathode 104 is made of a porous conductor such as activated carbon, carbon black, graphite, carbon nanotubes, graphene, etc. One or more air holes 116 are provided on a surface 114 of the package 112 facing the cathode 104. Oxygen in the air is taken into the positive electrode 104 through the air holes 116 and acts as a positive electrode active material.

[0007] At the negative electrode 102 of the air battery 100, metal ions dissolve in the electrolyte and release electrons. The electrons are taken out to an external circuit through the negative electrode lead. Meanwhile, at the positive electrode 104, electrons are taken in from the external circuit through the positive electrode lead, and the metal ions react with oxygen to form a metal oxide or hydroxide. For example, when zinc is used as the negative electrode active material, the reactions at the negative and positive electrodes are as follows: Negative electrode: 2Zn+4OH - →2ZnO+2H2O+4e - Positive electrode: O2+2H2O+4e - →4OH -

[0008] When lithium is used as the negative electrode active material, the reactions at the negative electrode and positive electrode are as follows. Negative electrode: 4Li→4Li + +4e - Positive electrode: O2+2H2O+4e - →4OH -

[0009] When aluminum is used as the negative electrode active material, the reactions at the negative and positive electrodes are as follows. Negative electrode: Al+3OH - →Al(OH)3+3e - Positive electrode: O2+2H2O+4e - →4OH -

[0010] Before using the air battery, in order to suppress the reaction with oxygen and prevent the self-discharge phenomenon, the air battery is stored in a package for blocking oxygen, or a mechanism for sealing the air intake with a seal or the like is adopted. However, even if such packaging or sealing is used, it is difficult to completely block oxygen, and there is a problem that the oxygen that has entered the air battery progresses the self-discharge reaction due to an electrochemical reaction over time, shortening the usable life of the air battery. In addition, when aluminum is used as the negative electrode active material, there is a problem that the high energy density inherent to the air battery cannot be fully utilized because the oxygen that has entered the air battery progresses the passivation of the aluminum. In addition, there is a problem that the evaporation of the electrolyte from the air hole progresses, shortening the usable life of the air battery. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP 2019-067618 A [Patent Document 2] JP 2019-003940 A Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been made in consideration of the above-mentioned problems, and aims to prevent the self-discharge phenomenon, passivation of the negative electrode, gas generation, and evaporation of the electrolyte before use, and to extend the usable life of an air battery. [Means for solving the problem]

[0013] A first embodiment of the present invention relates to a package for an air battery, the package including: a container-shaped exterior including a gas permeable region and a gas non-permeable region having a gas permeability coefficient smaller than that of the gas permeable region; an electrode assembly accommodating portion defined within the exterior capable of accommodating an electrode assembly including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode of an air battery; and an electrolyte solution accommodating portion defined within the electrode assembly accommodating portion, defining a space separated from the electrode assembly accommodating portion and capable of accommodating an electrolyte solution, the electrolyte solution accommodating portion including an opening portion that opens in response to an external force applied from outside the exterior and is capable of releasing the electrolyte solution into the electrode assembly accommodating portion.

[0014] In the first embodiment of the present invention, the air battery package can include a plurality of electrolyte containers.

[0015] In the first embodiment of the present invention, the opening may be sealed with an adhesive or a pressure sensitive adhesive before being opened.

[0016] In the first embodiment of the present invention, the opening may include a check valve.

[0017] In the first embodiment of the present invention, the electrolyte container can include an electrolyte injection section into which electrolyte can be injected from the outside of the exterior.

[0018] In the first embodiment of the present invention, the electrode assembly receiving portion may include an electrolyte outlet portion capable of discharging the electrolyte released into the electrode assembly receiving portion to the outside.

[0019] In the first embodiment of the present invention, the exterior surface of the sheath may have an indication portion corresponding to the position of the electrolyte containing portion.

[0020] A second embodiment of the present invention relates to an air battery including the air battery package of the first embodiment of the present invention and an electrode assembly including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode, which is accommodated in an electrode assembly accommodating portion.

[0021] In the second embodiment of the present invention, the air battery can further include an electrolyte solution contained in the electrolyte solution container. Effect of the Invention

[0022] According to the air battery package and air battery of the present invention, it is possible to prevent the self-discharge phenomenon before use and extend the usable life of the air battery. [Brief description of the drawings]

[0023] [Figure 1] 1 is a plan view of an air battery according to a first embodiment of the present invention. [Diagram 2] 2 shows a cross-sectional view of the air battery shown in FIG. 1. [Diagram 3] 2 shows a cross-sectional view of the air battery shown in FIG. 1. [Figure 4] FIG. 2 is a plan view of an air battery according to a second embodiment of the present invention. [Diagram 5] FIG. 4 shows a plan view of an air battery according to a third embodiment of the present invention. [Figure 6] FIG. 13 is a plan view of an air battery according to a fourth embodiment of the present invention. [Figure 7] 1 shows a cross-sectional view of a conventional air battery. [Figure 8] FIG. 8 shows a plan view of the air battery shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] FIG. 1 shows a plan view of an air battery 1 according to a first embodiment of the present invention, and FIG. 2 shows a cross-sectional view of the air battery 1 of FIG. 1 before the air battery 1 is used. FIG. 3 shows a cross-sectional view of the air battery 1 of FIG. 1 after the air battery 1 has been used. The air battery 1 includes an electrode assembly 8 including a negative electrode 2, an air electrode or a positive electrode 4, and a separator 6 disposed between the negative electrode 2 and the positive electrode 4, and an air battery package 12 that defines an electrode assembly housing portion 28 for housing the electrode assembly 8. The package 12 constitutes a container-shaped exterior. The air battery 1 also includes an electrolyte housing portion 18 that defines a space separated from the electrode assembly housing portion 28 inside the air battery package 12 and houses an electrolyte 10 inside the space. The air battery 1 has the form of, for example, a pouch-type battery, but may have various forms such as a button battery type and a dry battery type.

[0025] 2, before use, the electrolyte 10 of the air battery 1 is contained in the electrolyte container 18 in a state separated from the electrode assembly 8, and is not present in the electrode assembly container 28. Therefore, the area of ​​the electrode assembly container 28 excluding the electrode assembly 8 may be filled with air or may be a vacuum.

[0026] The electrolyte solution accommodating section 18 has an open section 20. Before use, the open section 20 is closed and holds the electrolyte solution 10 inside the electrolyte solution accommodating section 18. For this reason, the open section 20 is preferably sealed, for example, with an adhesive or a pressure sensitive adhesive before opening, or has a check valve that holds the electrolyte solution 10 inside the electrolyte solution accommodating section 18. The check valve is configured to open when a predetermined pressure is applied to the electrolyte solution 10 in the electrolyte solution accommodating section 18 to supply the electrolyte solution 10 to the electrode assembly accommodating section 28, but to prevent the electrolyte solution 10 from returning from the electrode assembly accommodating section 28 to the electrolyte solution accommodating section 18.

[0027] When the air battery 1 is used, as shown in FIG. 3, the opening 20 provided in the electrolyte solution storage section 18 is opened so that the electrode assembly storage section 28 is filled with the electrolyte solution 10. When the electrode assembly storage section 28 is filled with the electrolyte solution 10, the electrode assembly 8 becomes capable of outputting electric power to the outside as an air battery. In order to open the opening 20, an external force can be applied to the electrolyte solution storage section 18 from the outside of the package 12, for example, by pressing the package 12 with a finger, and the opening 20 can be opened by the pressure of the electrolyte solution 10. In order to appropriately apply an external force to the electrolyte solution storage section 18, an indication section 26 indicating the position of the electrolyte solution storage section 18 can also be provided on the outside of the package 12. The indication section 26 may be printed on the outer surface of the package 12 or provided as a protrusion.

[0028] The negative electrode 2 contains a metal as a negative electrode active material, and preferably contains a metal with a high ionization tendency, such as lithium, aluminum, zinc, magnesium, or sodium. Hereinafter, a case where the negative electrode active material is aluminum will be described as an example. However, it is also possible to adopt a material other than aluminum as the negative electrode active material. In this case, the chemical reaction at the positive electrode and the negative electrode will be clear to those skilled in the art of air batteries, although there are differences depending on the material of the negative electrode active material, such as whether a metal oxide or a metal hydroxide is generated, and whether the metal oxide or hydroxide is generated at the positive electrode or the negative electrode.

[0029] A negative electrode lead 22 is connected to the negative electrode 2. The negative electrode active material dissolves in the electrolyte 10 and is ionized, releasing electrons which are extracted via the negative electrode lead 22 to an external circuit.

[0030] The positive electrode 4 includes a porous conductor such as porous carbon. Porous carbon is chemically stable against the positive electrode active material and the negative electrode active material. In addition, since it is porous, it has a large surface area and efficiently incorporates the positive electrode active material and the negative electrode active material into the positive electrode. Therefore, the reaction efficiency of the battery can be improved.

[0031] When aluminum is used as the negative electrode active material, oxygen taken in from the air receives electrons in the pores of the positive electrode 4 and reacts with water in the electrolyte to become hydroxide ions. The hydroxide ions then move to the negative electrode 2 to generate aluminum hydroxide. Therefore, in the air battery 1, oxygen taken in from the air acts as a positive electrode active material, and the positive electrode 4 only functions to transfer electrons to the oxygen. In this embodiment, an example in which hydroxide ions move to the negative electrode to generate aluminum hydroxide has been described, but depending on the material of the negative electrode active material, a metal oxide may be generated at the negative electrode, or a metal ion may move to the positive electrode to generate a metal oxide or hydroxide at the positive electrode. When aluminum is used as the negative electrode active material, the reactions at the negative electrode and positive electrode are as follows. Negative electrode: Al+3OH - →Al(OH)3+3e - Positive electrode: O2+2H2O+4e - →4OH -

[0032] A positive electrode lead 24 is connected to the positive electrode 4. Electrons from an external circuit reach the positive electrode 4 via the positive electrode lead 24.

[0033] The separator 6 is disposed between the negative electrode 2 and the positive electrode 4, and is made of an insulating porous material such as a porous polymer that allows the electrolyte 10, metal ions, hydroxide ions, etc. to pass through while preventing contact between the negative electrode 2 and the positive electrode 4. The separator 6 has a mechanical strength that prevents a short circuit between the negative electrode 2 and the positive electrode 4 even if the precipitated metal oxide or metal hydroxide forms a dendrite.

[0034] An electrode assembly 8 is formed by the negative electrode 2, the positive electrode 4, and the separator 6 disposed between the negative electrode 2 and the positive electrode 4. The electrode assembly 8 can have various shapes, such as a laminate or a wound body, depending on the application field and the required shape. However, since the air battery 1 uses oxygen in the air as a positive electrode active material, it is necessary to take in sufficient oxygen into the positive electrode 4. When the electrode assembly 8 has a shape such as a laminate or a wound body, the positive electrode 4 is located inside the electrode assembly 8, making it difficult for oxygen in the air to reach the positive electrode 4. Therefore, it is preferable that the electrode assembly 8 is formed in a sheet shape so that oxygen in the air can be efficiently taken in by the positive electrode 4. Forming the electrode assembly 8 in a sheet shape also has the advantage of obtaining a thin air battery.

[0035] The packaging material constituting the package 12 includes a gas permeable region 14 and a gas non-permeable region 16. The gas permeable region 14 is configured such that when the electrode assembly 8 is housed in the package 12, the positive electrode 4 is located at a position corresponding to the gas permeable region 14. For example, when the electrode assembly 8 is housed in the package 12, at least a portion of the gas permeable region 14 overlaps with the positive electrode 4 in a planar view.

[0036] The gas permeable region 14 has a larger gas permeability coefficient than the gas non-permeable region 16. It is preferable that the material of the gas permeable region 14 has a particularly large oxygen permeability coefficient. For example, polydimethylsiloxane (PDMS) and polymethylpentene are preferable as materials for such gas permeable region 14. When the gas permeable region 14 is formed using such a material, it is possible to take in sufficient oxygen from the air to operate the air battery.

[0037] On the other hand, the gas non-permeable region 16 has a smaller gas permeability coefficient than the gas permeable region 14. Examples of materials having such a gas permeability coefficient include polystyrene (PS), polypropylene (PP), polycarbonate (PC), linear low-density polyethylene (L-LDPE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), etc. Also usable are inorganic vapor-deposited films that are generally used as barrier films to prevent gas permeation, such as aluminum thin films and metal oxide thin films vapor-deposited on the above or other well-known films.

[0038] The air battery 1 according to the first embodiment thus configured can accommodate the electrolyte 10 in the electrolyte accommodation portion 18 in a state separated from the electrode assembly 8 before use. Therefore, even if the positive electrode 4 comes into contact with oxygen, no battery reaction occurs in the electrode assembly 8, and the self-discharge phenomenon is prevented. Therefore, even if the air battery 1 before use is stored for a long time without packaging to block oxygen or with only simple packaging with low oxygen blocking ability, after use, the air battery 1 can extract power for a predetermined usable life according to the amount of the negative electrode active material. In addition, when aluminum is used as the negative electrode active material, it is possible to prevent oxygen from entering the air battery 1 during storage and passivation of the aluminum. Furthermore, it is possible to prevent the electrolyte 10 from evaporating from the gas permeable region 14 during storage. In addition, when using the air battery 1, the electrolyte 10 can be easily filled in the electrode assembly accommodation portion 28 by applying an external force to the electrolyte accommodation portion 18 from the outside of the package 12, and the air battery 1 can be easily made operable.

[0039] In addition, when a device operated by the output of the air battery 1 is suspended for a predetermined time, the electrolyte 10 may contain ions dissolved from the negative electrode active material, or the electrolyte 10 may evaporate from the gas permeable region 14, which may reduce the usable life of the air battery 1. However, when a check valve is used in the open portion 20, only a part of the electrolyte 10 in the electrolyte accommodating portion 18 may be supplied to the electrode assembly accommodating portion 28 to operate the air battery 1. Therefore, when starting to use the air battery 1, the check valve provided in the open portion 20 allows only the necessary amount of electrolyte 10 to be supplied to the electrode assembly accommodating portion 28. When resuming use of the air battery 1 after suspension of use, new electrolyte 10 may be supplied from the electrolyte accommodating portion 18 to the electrode assembly accommodating portion 28. Therefore, it is possible to prevent a reduction in the usable life of the air battery 1.

[0040] FIG. 4 shows an air battery 41 according to a second embodiment of the present invention. The air battery 1 shown in FIG. 4 has a similar configuration to the air battery 1 shown in FIGS. 1 to 3, but differs from the air battery 1 shown in FIGS. 1 to 3 in that it includes a plurality of electrolyte solution storage sections (electrolyte solution storage sections 18A to 18D) and a plurality of openings and a plurality of indication sections (openings 20A to 20D, indication sections 26A to 26D) corresponding thereto. FIG. 4 shows four electrolyte solution storage sections 18A to 18D as an example, but the number of electrolyte solution storage sections is not limited to four, and it may include two or more electrolyte solution storage sections. The electrolyte solution storage sections 18A to 18D each contain an electrolyte solution 10, and the electrolyte solution 10 is separated from the electrode assembly storage section 28 in which the electrode assembly 8 is contained.

[0041] When the air battery 41 according to the second embodiment is used, an external force applied to the electrolyte solution accommodating section 18A through the package 12 opens the opening 20A, and the electrolyte solution 10 is supplied into the electrode assembly accommodating section 28. When the air battery 41 is operated, the output of the air battery 41 may decrease over time because the electrolyte solution 10 contains an increased amount of ions dissolved from the negative electrode active material, and the electrolyte solution 10 evaporates through the gas permeable region 14. When the output of the air battery 41 decreases below a predetermined value, a user can apply an external force to the electrolyte solution accommodating section 18B through the package 12 and supply the electrolyte solution 10 into the electrode assembly accommodating section 28 through the opening 20B. Since new electrolyte solution 10 is supplied into the electrode assembly accommodating section 28, the air battery 41 can resume operation at a predetermined output.

[0042] The air battery 41 thus configured is suitable for application to, for example, a device that operates intermittently, that is, a device that operates for a time shorter than the service life of the air battery 41, then suspends operation, and resumes operation after a predetermined time has elapsed. That is, a user supplies the electrolyte 10 contained in the electrolyte accommodating section 18A to the electrode assembly accommodating section 28, and operates the air battery 41 for a predetermined time to operate the device. When the operation of the device ends, the user can remove the air battery 41 from the device or store it together with the device. After the predetermined time has elapsed, the user can supply the electrolyte 10 contained in the electrolyte accommodating section 18B to the electrode assembly accommodating section 28 to resume operation of the device. Therefore, the air battery 41 according to the second embodiment of the present invention can prevent a self-discharge phenomenon caused by oxygen entering the air battery 41, which occurs during the suspension of the operation of the device and storage of the air battery 41, passivation of the negative electrode active material (especially in the case of aluminum), and a decrease in service life caused by evaporation of the electrolyte 10 from the gas permeable region 14.

[0043] Fig. 5 shows an air battery 51 according to a third embodiment of the present invention. The air battery 51 shown in Fig. 5 has a similar configuration to the air battery 41 according to the second embodiment of the present invention shown in Fig. 4, but differs from the air battery 41 shown in Fig. 4 in that the package 12 includes an electrolyte discharge portion 30 that communicates between the electrode assembly housing portion 28 and the outside of the package 12.

[0044] The electrolyte discharge section 30 is usually closed to hold the electrolyte 10 in the electrode assembly housing section 28. However, for example, after the use of the air battery 51 is suspended, the electrolyte discharge section 30 can be opened to discharge the electrolyte 10 to the outside of the package 12. Therefore, when the use of the air battery 51 is resumed, the electrolyte discharge section 30 is closed and new electrolyte 10 is supplied from the electrolyte housing section 18, thereby enabling the air battery 51 to output a predetermined amount of power again.

[0045] The electrolyte discharge section 30 can be a well-known configuration, such as a general valve, which is easy to open and close and can reliably retain the electrolyte 10 in the electrode assembly accommodating section 28 when closed.

[0046] Furthermore, although the air battery 51 according to the third embodiment of the present invention includes a plurality of electrolyte solution storage sections 18A to 18D, the electrolyte solution discharge section 30 can also be employed in the air battery 1 including only one electrolyte solution storage section 18 as shown in Figures 1 to 3. In particular, when the opening section 20 of the electrolyte solution storage section 18 includes a check valve, only a portion of the electrolyte solution 10 can be supplied to the electrode assembly storage section 28 in multiple batches, which is advantageous because the electrolyte solution 10 supplied during the previous use can be discharged from the electrolyte solution discharge section 30 and then new electrolyte solution 10 can be supplied.

[0047] Fig. 6 shows an air battery 61 according to a fourth embodiment of the present invention. The air battery 61 shown in Fig. 6 has a similar configuration to the air battery 1 according to the first embodiment of the present invention shown in Figs. 1 to 3, but differs from the air battery 1 shown in Figs. 1 to 3 in that the package 12 includes an electrolyte injection section 32 that communicates between the electrolyte storage section 18 and the outside of the package 12.

[0048] The electrolyte injection section 32 is usually closed to hold the electrolyte 10 in the electrolyte storage section 18. After the electrolyte 10 is supplied to the electrode assembly storage section 28 and the air battery 61 is operated, new electrolyte 10 can be injected through the electrolyte injection section 32. When the air battery 61 is used for a certain period of time, the concentration of metal ions dissolved from the negative electrode active material into the electrolyte 10 may become high. In addition, when the air battery 61 is stored after suspending use, the electrolyte 10 may evaporate through the gas permeable region 14. Therefore, even if the use of the air battery 61 is resumed, a specified output cannot be obtained, and the usable life of the air battery 61 may be shortened. However, if new electrolyte 10 is injected from the electrolyte injection section 32 when the use of the air battery 61 is resumed, the air battery 61 can be used again with a specified output, and the usable life of the air battery 61 can be prevented from being shortened. Furthermore, since there is no need to previously store the electrolyte 10 required for the entire period of use of the air battery 61, the electrolyte container 18 can be made smaller, which leads to a smaller air battery 61.

[0049] The electrolyte injection section 32 advantageously uses a known structure such as a check valve to prevent leakage from the electrolyte storage section 18 to the outside of the package 12 .

[0050] 6 illustrates a configuration in which the air battery 61 has a single electrolyte solution storage section 18, but when the air battery 61 has a plurality of electrolyte solution storage sections as in the air battery 41 shown in Fig. 4, each electrolyte solution storage section can be provided with an electrolyte solution injection section 32. As in the air battery 51 shown in Fig. 5, an electrolyte solution discharge section 30 can be provided, and after used electrolyte solution 10 is discharged to the outside of the package 12, new electrolyte solution 10 can be injected.

[0051] Although the embodiments of the present invention have been described above by way of example, it will be readily understood by those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0052] 1, 41, 51, 61 Air battery 2 negative electrode 4 Positive electrode 6 Separator 8 Electrode assembly 10 Electrolyte 12 Packages 14 Gas permeable area 16 Gas impermeable area 18 Electrolyte storage section 20 Open area 22 Negative lead 24 Positive lead 26 Instruction section 28 Electrode assembly housing 30 Electrolyte drain 32 Electrolyte injection part 100 Conventional air battery 102 Negative electrode 104 Positive electrode 106 Separator 110 Electrolyte 112 Packages 114 Package Surface 116 Air Hole

Claims

1. A container-like exterior including a gas permeable region and a gas impermeable region having a gas permeability coefficient smaller than that of the gas permeable region; an electrode assembly receiving portion defined within the exterior and capable of receiving an electrode assembly including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode of an air battery; an electrolyte accommodating portion including a part of the exterior and a partition wall disposed within the electrode assembly accommodating portion and sealed to the exterior, the electrolyte accommodating portion defining a space separated from the electrode assembly accommodating portion between the part of the exterior and the partition wall and capable of accommodating an electrolyte; an electrolyte injection section provided in the exterior and capable of injecting electrolyte from outside the exterior into a space defined between the exterior and the electrolyte storage section; A package for an air battery, comprising: The electrolyte accommodating portion includes an opening portion that opens in response to an external force applied from outside the exterior and is capable of releasing the electrolyte into the electrode assembly accommodating portion.

2. The air battery package according to claim 1 , comprising a plurality of the electrolyte containing portions.

3. The air battery package according to claim 1 , wherein the opening is sealed with an adhesive or a pressure sensitive adhesive before being opened.

4. The package for a metal-air battery according to claim 1 , wherein the opening comprises a check valve.

5. The air battery package according to claim 1 , further comprising an electrolyte outlet portion capable of discharging the electrolyte released in the electrode assembly receiving portion to the outside.

6. 3. The air battery package according to claim 1, further comprising an indication portion on an outer surface of the exterior packaging, the indication portion corresponding to a position of the electrolyte-containing portion.

7. A package for an air battery according to any one of claims 1 to 6; an electrode assembly accommodated in the electrode assembly accommodating portion, the electrode assembly including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode; Including an air battery.

8. The air battery according to claim 7 , further comprising an electrolyte contained in the electrolyte container.

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