A metal air-powered battery comprises a multi module air supply unit with air suction units or air purification units that are in an arrangement that is parallel. A metal air battery also comprises a module which has a metal cell and an air supply unit which supplies air to the module. The air supply unit comprises an oxygen suction unit which suctions air, as well as an oxygen purification unit that takes nitrogen and moisture out of the water suctioned. The air suction unit or the air purification unit can be provided in plural to form an arrangement that is parallel to define the multi module air supply unit.

1. Field

The present disclosure pertains to the metal air battery and, more specifically, to an air battery made of metal that includes the multi-module air supply unit having two or more air suction units or air purification units that are connected in a parallel arrangement.

2. Description of Related Art

A metal air battery consists of several metal air cells. Every one of these metal air cells is equipped with an anode capable of intercalating and deintercalating the ions as well as a cathode using oxygen from air as an active component. The cathode is responsible for the reduction/oxidation, or reduction/reduction of oxygen injected from the outside. The metal battery converts the chemical energy produced by the oxidation/reduction reaction into electrical energy and creates the electrical energy. For example, the metal air battery absorbs oxygen during discharging and emits oxygen during charging. Since the metal air battery draws oxygen from the air, the energy density ofthe battery may dramatically increase. For instance, the metal air battery may have an energy density that is several times higher than an energy density that is comparable to a traditional lithium ion battery.

The metal air battery is stable due to its low probability of ignition due to abnormally high temperatures. Furthermore, as the battery is operated solely by absorption and release of oxygen, without the use of the use of heavy metals, there is a relatively very low chance of the air battery contaminating the environment. Numerous studies have been conducted regarding the metal-air battery as a result of its numerous advantages.

The metal air battery can be described in a particular embodiment as having a battery module that generates electricity as well as a metal cell which uses oxygen from the air as an activator material for the cathode to generate electricity. An airsupply unit connects to the module, and supplies air to the module. The air supply unit comprises an air suction device that suctions air from outside, as well as an air purification unit that is connected to the suction unit to receivesuctioned air from it and remove any impurities that are a result of suctioning the air. To create a multi-module structure, the air suction device comprises multiple air handling modules that are connected to each other.

An example of an air suction system comprises one air tank which stores suctioned water. A plurality compressors are connected parallel to each other to a single tank. Each compressor is connected to one tank that suctions outside air and supply the suctioned to the tank.

In an embodiment of this, the air suction device further includes a plurality of air tanks, each of which holds air. As the number of air-handling units in the air suction unit there is a multitude of compressors arranged in a parallel arrangement each other, the compressors being each connected to the plurality of air tanks in order to suction air from outside and supply the suctioned air into a matching air tank, and a variety of valves respectively linked to the different air tanks to control the amount of air that is produced from the plurality of air tanks.

In one particular embodiment, the metal air battery further includes a sensor unit including several pressure gauges respectively connected to the plurality of air tanks within the air suction unit to detect an internal pressure inside an airtank that is corresponding to the.

In one embodiment, the metal air battery further includes a controller connected to the sensor unit and to the air supply unit in order to receive internal pressure information of the air tanks of the air suction unit provided from the variety of pressure gauges in the sensor unit. Based on the information about internal pressure the controller regulates the various valves of an air suction unit in order to regulate the amount of air that is pumped out from the various air tanks.

A controller controls the quantity and output of the air from the tank with the most internal pressure. The controller also controls the volume of air from the tank that has the lowest pressure inside.

A controller may also stop the air flow in any of the air tanks that are part of the air supply unit by closing a valve connected to the air tank.

In one embodiment, among the plurality of air tanks in the air supply unit, the controller further opens a valve of an air tank with the greatest internal pressure, and closes the valves on other air tanks.

In an embodiment, the controller further opens the valve on the tank that has the highest internal pressure, and closes the valves of remaining air tanks according to change of internal pressure in the air tanks in the series.

In an embodiment, among the many air tanks respectively connected to the various compressors of the air supply unit the controller controls on a compressor attached to an air tank with an internal pressure less than the pressure of the areference until such air tank reaches a maximum pressure and ceases the operation of a compressor linked to an air tank having an internal pressure which has reached the maximum pressure.

In a particular embodiment, the air handling capacities of the various compressors are same.

In one embodiment, the air-handling capacities of the various compressors are different from each other.

In an embodiment, capacities of the various air tanks differ from each other.

An air purifier unit contains several air-handling units which are connected to form a multi-module arrangement.

In an embodiment of the invention, the air purification unit comprises, as the multiple air handling modules, a variety of air purifiers connected in a parallel arrangement with each other, each air purifier receiving the suctioned air from the suctionunit to separate the impurities in the suctioned air and output the remaining suctioned air to the battery module.

In an embodiment, the plurality of air purifiers removes moisture and nitrogen from air by adsorption-desorption or removes moisture and nitrogen by an impurity separator.

In a particular embodiment each of the air purifiers has a first adsorption unit and an additional adsorption unit, each of which separates the impurities from suctioned air. The first adsorption unit includes an initial adsorbent that adsorbs impurities and the first regeneration unit, which is able to regenerate the first adsorbent, and the second adsorption unit has a second adsorbent which adsorbs impurities, and a second regeneration unit which regenerates the second adsorbent.

A typical air purifier makes use of a combination of an adsorption method that is a pressure swing (“PSA”), the thermal swing adsorption (?TSA”), a pressure thermal sway adsorption (?PTSA”), and the vacuum swingadsorption (?VSA”) method.

In one embodiment, each of the plurality of air purifiers includes an oxygen separator that includes an element of separation, for example, an oxygen separator that separates nitrogen from the suctioned air and a pump attached to the oxygen separator that can output thesuctioned air having nitrogen removed from it to the battery module.

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