KR20240010205A - bag for packaging zinc-air battery - Google Patents

Abstract

The present invention relates to a zinc-air battery packaging bag, which includes a storage body having a receiving space for accommodating a zinc-air battery inside, the receiving space being closed to the outside, and a zinc-air battery accommodated in the storage body. A first pack containing an oxygen absorber to suppress self-discharge is further provided. This zinc air battery packaging bag provides the advantage of preventing deterioration of battery performance by suppressing self-discharge of the zinc air battery in the packaged state until opening.

Description

Zinc air battery packaging bag {bag for packaging zinc-air battery}

The present invention relates to a zinc-air battery packaging bag, and more specifically, to a zinc-air battery packaging bag that contains a zinc-air battery and allows distribution in a stored state until use.

Zinc-air batteries have a much higher theoretical energy density than lithium-based secondary batteries, and are attracting great attention as alternative energy storage devices for transportation devices such as electric vehicles and various portable electronic devices. Zinc-air batteries have been disclosed in various ways, including domestic registered utility model No. 20-0331899.

Unlike lithium secondary batteries, these zinc-air batteries use a zinc-based cathode and aqueous electrolyte that are stable even when exposed to the atmosphere, and use air in the atmosphere as fuel for the anode to generate a discharge reaction, so short heat caused by external shock is generated. However, the risk of ignition or explosion is significantly low, making it suitable as a power source for body-worn Internet of Things (IoT) devices. In addition, as the wearable market has recently expanded, the demand for flexible batteries has increased significantly. The high energy density of zinc-air batteries, the ease of converting components into an all-solid state, and the simple stacking Due to the stack structure, research on flexible zinc-air batteries is actively underway.

Meanwhile, zinc air batteries can self-discharge due to oxygen when stored, and a structure that can be packaged and provided to suppress such self-discharge is required.

The present invention was created to solve the above requirements, and its purpose is to provide a zinc-air battery packaging bag that can suppress self-discharge when stored in a packaged state for distribution.

In order to achieve the above object, the zinc air battery packaging bag according to the present invention includes a storage body having a receiving space for accommodating a zinc air battery inside, and the receiving space being closed to the outside; It is further provided with a first pack containing an oxygen absorbent to suppress self-discharge of the zinc-air battery accommodated in the storage body.

According to one aspect of the present invention, the oxygen absorber is a mixture of iron powder and sodium chloride.

In addition, the storage body may further include a second pack containing a carbon dioxide remover.

In addition, the carbon dioxide remover includes at least one of zeolite, calcium hydroxide, sodium hydroxide, and lithium hydroxide, and the storage body is made of a heat-sealable synthetic resin material.

The zinc air battery packaging bag according to the present invention provides the advantage of preventing battery performance degradation by suppressing self-discharge of the zinc air battery in the packaged state until opening.

1 is a perspective view showing a zinc-air battery packaging bag according to the present invention;
Figure 2 is a perspective view of the zinc air battery of Figure 1;
Figure 3 is a cross-sectional view of the zinc air battery of Figure 2.

Hereinafter, a zinc air battery packaging bag according to a preferred embodiment of the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a perspective view showing a zinc air battery packaging bag according to the present invention, Figure 2 is a perspective view of the zinc air battery of Figure 1, and Figure 3 is a cross-sectional view of the zinc air battery of Figure 2.

Referring to Figures 1 to 3, the zinc air battery packaging bag 10 according to the present invention includes a storage body 12, a first pack 20, and a second pack 30.

The storage body 12 has an accommodating space for accommodating the zinc air battery 100 inside, and the accommodating space is closed to the outside.

The storage body 12 is made of heat-sealable synthetic resin, for example, polyolefin material. Alternatively, the storage body 12 may have a structure having an inner layer made of an aluminum alloy thin film within an outer layer made of heat-sealable synthetic resin.

The zinc-air battery 100 is accommodated inside the storage body 12 and includes a case 110, an air electrode portion 130, a separator 150, a negative electrode portion 170, and a valve 180.

The case 110 functions to protect the zinc-air battery 100 and is made of synthetic resin.

A plurality of gas discharge holes 111 in communication with the outside are formed on the upper surface of the case 110 opposite the cathode electrode unit 170, which will be described later, and on the lower surface opposite the air electrode unit 130, air is introduced. A number of air holes 115 that allow are formed. Of course, unlike the example shown, a single gas discharge hole 111 may be formed on the upper surface of the case 110 to communicate with the outside.

In addition, on the upper and lower surfaces of the case 110, a first electrode 191, which serves as a cathode, and a second electrode 192, which serves as an anode, are formed to be exposed to the outside, and an off-gassing type zinc-air battery (not shown) is formed. When the and air holes 115 are arranged facing each other, a first area (a1) and a second area (a1) that divide the bottom of the case 110 into two to enable interconnection while forming an air inflow space in a spaced state In a2), in the first area (a1), a plurality of first coupling pipes 121 having pin insertion grooves 121a are formed so as to protrude downward, and in the second area (a2), the pin insertion grooves 121a are formed. A plurality of fitting pins 122 that are inserted and fitted are formed.

Additionally, the first electrode 191 is formed in the center of the area corresponding to the second area (a2).

Case 110 is structured to have an upper case 112, a lower case 114, and a gasket 118 for ease of assembly.

The upper case 112 includes a first rectangular plate-shaped portion 112a in which a gas discharge hole 111 is formed to form the upper surface of the case 110, and a first plate-shaped portion 112a extending downward from the edge of the first plate-shaped portion 112a. A first vertical jaw portion (112b) and a second vertical jaw portion (112c) extending from the bottom of the first vertical jaw portion (112b) to have an inner diameter larger than the first vertical jaw portion (112b) and extending vertically downward. It has a structure that has On the ceiling surface opposite the first plate-shaped portion 112a of the upper case 112, spacing guide pins 112d extending downward are formed to be spaced apart from each other to guide the cathode electrode portion 170 to be supported in a spaced state. there is.

In addition, a through hole 113 for the first electrode is formed in the first plate-shaped portion 112a of the upper case 112 so that the first electrode 191 can be mounted to be exposed to the outside.

The lower case 114 is accommodated within the second vertical jaw portion 112c of the upper case 112 and is formed in a size that can interfere with the first vertical jaw portion 112b to block entry.

When dividing the lower case 114, a plurality of air holes 115 are formed to be spaced apart from each other so that they can be coupled to the second square plate-shaped portion 114a forming the bottom of the case 110 and the upper case 112. A structure having a third vertical jaw portion 114b that extends upward from the edge of the second plate-shaped portion 114a and enters the inside of the second vertical jaw portion 112c, but extends to interfere with the first vertical jaw portion 112b. It is written as .

A through hole 117 for the second electrode is formed in the second plate-shaped portion 114a of the lower case 114 so that the second electrode 192 can be exposed to the outside.

The previously described first coupling pipe 121 and fitting pin 122 are formed to protrude from the bottom of the second plate-shaped portion 114a of the lower case 114.

In addition, the third vertical jaw portion 114b of the lower case 114 has a plurality of square insertion holes 114c spaced apart from each other along the sides into which the hook 118b of the gasket 118, which will be described later, can be inserted and locked. It is formed.

The gasket 118 is tightly coupled to the inside of the lower case 114, forming a sheet plate-shaped element in which the air electrode unit 130 and the separator 150 are integrated into a second plate shape along the inner edge of the lower case 114. The frame body 118a is formed in a square frame shape to be in close contact with the portion 114a, and is inserted into the outer surface opposite to the inside of the third vertical jaw portion 114b of the lower case 114 of the frame body 118a when assembled. It is structured to have a hook 118b that protrudes to fit into the hole 114c.

In the assembled state, the space between the lower case 114 and the upper case 112 is sealed with a sealing material.

The air electrode unit 130 is a square sheet on the bottom of the lower case 114 so that air flowing in through the air hole 115 formed in the second plate-shaped portion 114a, which is the bottom of the case 110, can be contacted. It is arranged in a complex form.

The air electrode unit 130 has a structure in which a hydrophobic film, a catalyst layer, and a diffusion layer are sequentially stacked.

The hydrophobic membrane is a membrane formed of a material that allows air to pass through and blocks the infiltration of moisture from the outside, and is formed with a hydrophobic binder such as polytetrafluoroethylene (PTFE).

The catalyst layer is a layer that reacts with oxygen in the air to generate hydroxide ions, and may be composed of a catalyst, a carrier supporting the catalyst, and a conductor. As an example, the catalyst layer may be formed by combining various known materials, such as activated carbon, carbon nanofibers, manganese oxide, platinum oxide, carbon black as a conductor, and a Teflon binder.

The diffusion layer provides a flow path for oxygen and functions as a current collector, and can be formed in various structures, such as a structure in which activated carbon is pressed onto a metal screen made of nickel.

Of course, the air electrode unit 130 may have various known structures different from the exemplified structure.

The second electrode 192 extending downward from the bottom of the air electrode unit 130 is located in the first area (a1) corresponding to the position of the first electrode 191 when the second area (a2) is rotated 180 degrees. It is formed in the center.

The separator 150 functions to isolate the air electrode unit 130 and the cathode electrode unit 170 and may be made of an ion-permeable material that allows hydroxide ions to pass through, for example, polypropylene.

The separator 150 is preferably integrally coupled with the air electrode portion 130, and in the example shown, it is integrally joined in the form of a sheet on the metal mesh 132.

The cathode electrode unit 170 is disposed on the separator 150.

The cathode electrode unit 170 is a part that functions as a cathode of the zinc-air battery 100, and may be formed by zinc powder and electrolyte solution formed in a gel state by a binder.

Of course, the cathode electrode unit 170 can be formed in a pack form by accommodating a cathode mixture consisting of an electrolyte, a gelling agent, a binder, and zinc.

The valve 180 is coupled to the upper surface of the case 110 and opens the gas discharge hole 111 when the set reference gas pressure is higher than the set standard gas pressure.

The valve 180 is formed of a first seat 181 and a second opening/closing seat 183.

The first sheet 181 is a sheet extending in a strip shape and is joined to the upper surface of the case 110 and has an opening and closing hole communicating with the gas discharge hole 111.

The second opening and closing sheet 183 covers the opening and closing hole on the upper surface of the first sheet 181. When the gas pressure applied through the opening and closing hole is higher than the set reference gas pressure, the first passage (183a) is opened, and when the gas pressure applied through the opening and closing hole is less than the reference gas pressure, the first passage 183a is opened. The periphery 183b of the first passage 183a is joined to the first sheet 181 so that the first passage 183a closes the opening and closing hole in close contact with the first sheet 181.

The second opening and closing sheet 183 is in the shape of a square sheet and has a larger size than the opening and closing hole, and the peripheral portions 183b, which are areas on both sides of the central portion forming the first passage 183a, are connected to the first sheet 181. It is bonded.

This second opening and closing sheet 183 is in close contact with the first sheet 181 to open the opening and closing hole when the first passage (183a) part is above the standard gas pressure, and to close the opening and closing hole when it is below the standard gas pressure. It supports the release of gas generated from the cathode electrode unit 170 to the outside of the case 110.

The first pack 20 has an oxygen absorbent built in to suppress self-discharge of the zinc-air battery accommodated in the storage body 12. The first pack (20) consists of a first bag (21) and an oxygen absorber (22) built into the first bag (21). The first bag 21 can be used to package the oxygen absorber 22 and to be made of a material that allows oxygen to pass through.

The oxygen absorber 22 may be a mixture of iron powder and sodium chloride.

The second pack 30 is built into the receiving space of the storage body 12, and is applied to suppress self-discharge by increasing the electrical resistance of the zinc-air battery. The second pack (30) consists of a second bag (31) and a carbon dioxide remover (32) built into the second bag (31). The second bag 31 may be made of a material that packages the carbon dioxide remover 32 and allows carbon dioxide to pass through.

The carbon dioxide remover 32 may be at least one of zeolite, calcium hydroxide, sodium hydroxide, and lithium hydroxide.

This zinc air battery packaging bag provides the advantage of preventing deterioration of battery performance by suppressing self-discharge of the zinc air battery in the packaged state until opening.

12: Storage body 20: 1st pack
30: 2nd pack

Claims (4)

a storage body having an accommodating space for accommodating a zinc air battery therein, and the accommodating space being closed to the outside;
A zinc-air battery packaging bag further comprising a first pack containing an oxygen absorber to suppress self-discharge of the zinc-air battery accommodated in the storage body. The zinc-air battery packaging bag according to claim 1, wherein the oxygen absorber is a mixture of iron powder and sodium chloride. The zinc-air battery packaging bag according to claim 1, further comprising a second pack containing a carbon dioxide remover built into the storage body. The zinc-air battery packaging bag according to claim 3, wherein the carbon dioxide remover contains at least one of zeolite, calcium hydroxide, sodium hydroxide, and lithium hydroxide, and the storage body is made of a heat-sealable synthetic resin material.

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