JP2013149452A - Air battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that an entire device of a conventional air battery has a very complicated and large structure as an electrolytic solution is circulated at the battery exterior for the battery composed of a number of unit cells.SOLUTION: An air battery C1 includes a positive electrode 1, a metal negative electrode 2, and an electrolytic solution holding container 4 where an electrolytic solution 3 is poured. The electrolytic solution holding container 4 includes: an electrode part 4A disposed between the positive electrode 1 and the metal negative electrode 2; and a heat radiation part 4B extending to the battery exterior. In the air battery C1, the electrolytic solution 3 may be circulated between the electrode part 4A and the heat radiation part 4B. This structure enables a separation of a deposit Q occurring from the electrolytic solution 3 to be conducted in a single battery. Thus, even when an air battery module M is formed by multiple air batteries, the downsizing and the weight reduction of an entire device is realized.

Description

  The present invention relates to an improvement of an air battery using oxygen as a positive electrode active material.

  As a conventional air battery, for example, there is one described in Patent Document 1. The air battery described in Patent Document 1 includes a battery made up of a large number of unit cells. At the time of charging, the electrolytic solution in the liquid storage tank is circulated and supplied to the battery, and at the time of discharging, the liquid storage tank is separated and attached to the battery. The electrolytic solution in the drainage tank is circulated and supplied to the battery.

  The air battery includes a filter through which the electrolyte passes between the liquid storage tank and the electrolyte feed pump, and a precipitation tank in which the reflux liquid inflow pipe faces in the liquid storage tank. A large number of spouts for the stirring pipe are arranged on the bottom surface in the liquid storage tank. Prior to charging, the electrolyte additive settled in the liquid storage tank is stirred and dissolved by the pumping liquid ejected from the stirring pipe, and during charging, the falling zinc and zinc oxide accumulated in the battery at the time of discharging are settled. The solution is stirred and dissolved in the inside.

Japanese Patent Publication No.58-32750

  By the way, in this kind of air battery, since a metal salt precipitates from the electrolytic solution along with discharge, the conductivity may decrease due to the precipitate, and the output may decrease. On the other hand, in the conventional air battery, although it is possible to remove precipitates with a filter, the pump including a pump, a storage tank, and a drainage tank is used for a battery composed of many unit cells. In addition, the sedimentation tank, the agitating pipe and each piping are respectively arranged, and the electrolyte is circulated outside the battery and used in the forward direction, so there is a problem that the entire apparatus becomes very complicated and large. It was a problem to solve such problems.

  The present invention has been made in view of the above-described conventional situation, and can separate precipitates generated from an electrolyte solution inside a single battery and constitute an air battery module using a large number of them. Even in such a case, it is an object to provide an air battery capable of realizing a reduction in size and weight of the entire apparatus.

  The air battery of the present invention includes a positive electrode, a metal negative electrode, and an electrolytic solution holding container into which an electrolytic solution is injected. In the air battery, the electrolyte holding container includes an electrode part interposed between the positive electrode and the metal negative electrode, and a heat radiating part extending to the outside of the battery, and the electrolytic solution is provided between the electrode part and the heat radiating part. The configuration is such that it can be circulated, and the above configuration is used as means for solving the conventional problems.

  Since the air battery of the present invention employs the above-described configuration, the precipitate generated from the electrolyte can be separated inside a single battery. Thereby, even when an air battery module is configured by using a large number of the air batteries, the entire apparatus can be reduced in size and weight.

It is sectional drawing (A) explaining one Embodiment of the air battery which concerns on this invention, and the front view (B) by the side of a positive electrode. It is front explanatory drawing by the side of the positive electrode which shows other embodiment of the air battery of this invention. It is front explanatory drawing by the side of the positive electrode which shows other embodiment of the air battery of this invention. It is sectional drawing explaining other embodiment of the air battery of this invention. It is sectional drawing explaining other embodiment of the air battery of this invention. It is sectional drawing explaining other embodiment of the air battery of this invention. It is a front view explaining other embodiment of the air battery of this invention. It is a front view explaining other embodiment of the air battery of this invention. It is a front view explaining other embodiment of the air battery of this invention. It is a front view explaining other embodiment of the air battery of this invention. It is sectional drawing explaining one Embodiment of the air battery module provided with the air battery of this invention.

  An air battery C1 shown in FIG. 1 includes a positive electrode 1 (air electrode) 1, a metal negative electrode 2, and an electrolytic solution holding container 4 into which an electrolytic solution 3 is injected. The air battery C1 includes an electrode part 4A interposed between the positive electrode 1 and the metal negative electrode 2, and a heat radiating part 4B extending outside the battery, and the electrode part 4A and the heat radiating part. In this structure, the electrolytic solution 3 can be circulated with 4B.

  Although not shown in detail, the positive electrode 1 includes a positive electrode member and a liquid-tight ventilation member arranged in the outermost layer. The positive electrode member includes, for example, a catalyst component and a conductive catalyst carrier that supports the catalyst component.

  Specific examples of the catalyst component include platinum (Pt), ruthenium (Ru), iridium (Ir), rhodium (Rh), palladium (Pd), osmium (Os), tungsten (W), lead (Pb), Metals such as iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), vanadium (V), molybdenum (Mo), gallium (Ga), aluminum (Al) and the like An alloy can be selected.

  The shape and size of the catalyst component are not particularly limited, and the same shape and size as those of conventionally known catalyst components can be employed. However, the shape of the catalyst component is preferably granular. The average particle diameter of the catalyst particles is preferably 1 to 30 nm. When the average particle diameter of the catalyst particles is within such a range, it is possible to appropriately control the balance between the catalyst utilization rate related to the effective electrode area where the electrochemical reaction proceeds and the ease of loading.

  The catalyst carrier functions as a carrier for supporting the above-described catalyst component, and an electron conduction path involved in the transfer of electrons between the catalyst component and another member. Any catalyst carrier may be used as long as it has a specific surface area for supporting the catalyst component in a desired dispersion state and sufficient electron conductivity, and the main component is preferably carbon. Specific examples of the catalyst carrier include carbon particles made of carbon black, activated carbon, coke, natural graphite, artificial graphite, and the like. The size of the catalyst carrier is not particularly limited, but from the viewpoint of controlling the ease of loading, the catalyst utilization, and the thickness of the catalyst layer within an appropriate range, the average particle size is about 5 to 200 nm, preferably 10 to 10 nm. About 100 nm is preferable.

  In the positive electrode member, the supported amount of the catalyst component is preferably 10 to 80% by mass, more preferably 30 to 70% by mass with respect to the total amount of the electrode catalyst. A conventionally known material applied to the above can be applied.

  The liquid-tight ventilation member is a member that has liquid-tightness (water-tightness) with respect to the electrolytic solution 3 and has air-permeability with respect to oxygen. This liquid-tight ventilation member uses a water-repellent film such as polyolefin or fluororesin so as to prevent the electrolytic solution 3 from leaking to the outside, and on the other hand, a large number so that oxygen can be supplied to the positive electrode member. Have fine pores.

  The metal negative electrode 2 includes a negative electrode active material made of a single metal or an alloy whose standard electrode potential is lower than that of hydrogen. Examples of simple metals whose standard electrode potential is lower than that of hydrogen include zinc (Zn), iron (Fe), aluminum (Al), magnesium (Mg), manganese (Mn), silicon (Si), titanium (Ti), and chromium. (Cr), vanadium (V), etc. can be mentioned. Examples of the alloy include those obtained by adding one or more metal elements or non-metal elements to these metal elements. However, the material is not limited to these, and a conventionally known material applied to the air battery can be applied.

  As the electrolytic solution 3, for example, an aqueous solution of potassium chloride, sodium chloride, potassium hydroxide or the like can be applied, but is not limited thereto, and a conventionally known electrolytic solution applied to an air battery is applied. Can do. The amount of the electrolytic solution 3 takes into consideration the discharge time of the air battery C1, the amount of metal salt deposited during discharge, the total volume of pores in the electrolytic solution holding container 4, and the flow rate capable of maintaining a constant composition. Determined.

  The electrolyte solution holding container 4 can include, for example, a glass paper that has not been subjected to water repellent treatment, and a porous membrane separator made of polyolefin such as polyethylene or polypropylene. However, the material is not limited to these, and a conventionally known material applied to the air battery can be applied.

  In addition, the electrolytic solution holding container 4 includes a heat radiating portion 4B and a casing 4C that are particularly outside the battery as components other than the positive electrode and the negative electrode. Although the material of the casing 4C is not limited, it is preferable that the casing 4C be formed of a metal having low thermal resistance. For example, copper (Cu) or a copper alloy, aluminum (Al) or an aluminum alloy may be employed. it can.

  In the air battery C <b> 1 of this embodiment, the heat radiating part 4 </ b> B of the electrolytic solution holding container 4 includes a heat sink 5. The heat sink 5 in the illustrated example is a heat radiating plate formed integrally with a casing 4C forming the heat radiating portion 4B, and a plurality of heat sinks are provided at regular intervals. As the heat sink 5, in addition to a heat radiating plate, one having an appropriate shape such as a rod shape or one made of a porous body can be adopted.

  The air battery C1 has a structure in which the electrolytic solution holding container 4 accumulates deposits generated from the electrolytic solution 3 during discharge in the heat radiating portion 4B. In this embodiment, the deposits are stored in the heat radiating portion. As a structure for accumulating in 4B, a heat radiating portion 4B is provided below the electrode portion 4A. That is, the air battery C1 in the illustrated example has a structure in which precipitates are precipitated in the lower portion of the heat radiating portion 4B by its own weight.

  Furthermore, the air battery C <b> 1 includes an electrode heat retaining means 6 that retains the temperature of the electrode portion 4 </ b> A of the positive electrode 1, the metal negative electrode 2, and the electrolyte solution holding container 4, as indicated by phantom lines in FIG. The configuration of the electrode heat retaining means 6 is not particularly limited, and an appropriate member that can keep the inside warm, such as a well-known heat shield sheet, can be employed.

  Further, as shown in the drawing, the air battery C1 has an electrolyte solution holding container 4 filled with an electrolyte solution 3 in an initial state. In this case, in order not to self-discharge, the battery is hermetically accommodated in a case (not shown), or the positive electrode 1 is covered with a peelable air-tight sheet to cut off the oxygen supply to the positive electrode 1. It is necessary to keep.

  The air battery C <b> 1 having the above configuration starts discharging by introducing air (oxygen) into the positive electrode 1. At this time, in the air battery C <b> 1, a metal salt (precipitate) is deposited from the electrolytic solution 3 with discharge. This precipitate causes a decrease in the discharge reaction. On the other hand, it has been found that the higher the temperature of the electrolytic solution 3, the more the amount of dissolution increases (the precipitate is more easily dissolved).

  Therefore, the air battery C1 is an electrolytic solution holding container 4 including an electrode part 4A sandwiched between the positive electrode 1 and the negative electrode 2 and a heat radiating part 4B extending to the outside of the battery. A temperature difference is provided between the liquid 3 and the electrolytic solution 3 in the heat radiation part 4B. As a result, in the electrode portion 4A having a high temperature, the amount of precipitates dissolved is large (the amount of precipitation is small), and a good discharge that is not affected by the precipitates is performed. In addition, in the heat radiating portion 4B, which has a low temperature and does not contribute to discharge, the amount of precipitate dissolved is small (the amount of precipitation is large), and the precipitate Q is separated from the electrolyte 3 as shown in FIG. The Rukoto.

  In this manner, the air battery C1 can separate the precipitate Q generated from the electrolyte solution 3 inside a single battery. Thereby, even when an air battery module is configured by using a large number of the air batteries, the entire apparatus can be reduced in size and weight.

  Further, in the air battery C1, since the heat radiating part 4B of the electrolyte solution holding container 4 has the heat sink 5, the heat radiating action in the heat radiating part 4B is further improved, and the temperature between the electrode part 4A and the heat radiating part 4B is increased. The difference becomes larger, and the precipitation Q can be more reliably precipitated and separated.

  Further, in the air battery C1, the heat radiating part 4B (casing 4C) of the electrolytic solution holding container 4 is formed of a metal such as copper or aluminum having a small thermal resistance. As a result, the temperature difference between the electrode portion 4A and the heat radiating portion 4B becomes larger, and the precipitate Q can be more reliably deposited and separated.

  Further, in the above air battery C1, convection of the electrolytic solution 3 is generated due to a temperature difference between the electrode portion 4A and the heat radiating portion 4B in the electrolytic solution holding container 4. As a result, the electrolytic solution 3 from which the precipitate Q has been separated in the heat radiating portion 4B circulates and circulates in the electrode portion 4A, and a good discharge reaction on the electrode portion 4A side and a precipitate on the heat radiating portion 4B side are circulated. The precipitation and separation of Q are continued.

  Further, the air battery C1 has a structure in which the electrolytic solution holding container 4 accumulates the precipitate Q generated from the electrolytic solution 3 in the heat radiating portion 4B, whereby the precipitate Q is transferred to the electrode portion 4A. To prevent a situation in which the discharge reaction is disturbed. In this embodiment, as the structure for accumulating the precipitate Q in the heat radiating portion 4B, the heat radiating portion 4B is provided on the lower side of the electrode portion 4A, and the precipitate Q is precipitated by its own weight. Can be separated.

  Further, since the air battery C1 includes the electrode heat retaining means 6 for retaining the electrode part 4A of the positive electrode 1, the metal negative electrode 2, and the electrolyte holding container 4, there is a temperature difference between the electrode part 4A and the heat radiating part 4B. It becomes much larger, so that dissolution of the precipitate Q in the electrode portion 4A can be promoted, and precipitation and separation of the precipitate Q in the heat radiation portion 4B can be more reliably performed.

  2-11 is a figure explaining other embodiment of the air battery which concerns on this invention. In each of the following embodiments, the same components as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  An air battery C2 shown in FIG. 2 includes a fluid flow path 7 through which gas or liquid flows, and a heat radiating portion 4B of the electrolyte solution holding container 4 is disposed in the fluid flow path 7. In this embodiment, the fluid that flows through the fluid flow path 7 is air, and the air supply path 8 that supplies the air that has passed through the fluid flow path 7 to the positive electrode 1 is provided. A fan 9 for pumping air is provided at the inlet of the fluid flow path 7.

  The air battery C2 described above has a larger temperature difference between the electrolyte solution 3 of the electrode portion 4A and the heat dissipation portion 4B electrolyte solution 3 in the electrolyte holding container 4 by cooling the heat dissipation portion 4B with air that is a fluid, The dissolution of the precipitate Q in the electrode portion 4A can be promoted, and the precipitation and separation of the precipitate Q in the heat radiation portion 4B can be more reliably performed. Further, in the fluid flow path 7, heat exchange is performed between the heat radiating unit 4 </ b> B and air, and the preheated air is supplied to the positive electrode 1, so that the discharge efficiency can be further increased.

  An air battery C3 shown in FIG. 3 includes a fluid flow path 7 through which gas or liquid flows, and a heat radiating portion 4B of the electrolyte solution holding container 4 is disposed in the fluid flow path 7. Further, in this embodiment, the fluid flowing through the fluid flow path 7 is the electrolytic solution 3, and the electrolytic solution supply path 10 that supplies the electrolytic solution 3 that has passed through the fluid flow path 7 to the electrolytic solution holding container 4 is provided. . In this case, an electrolyte solution supply means 11 is provided on the inlet side of the fluid flow path 7, and an electrolyte solution 3 discharge means 12 is provided in the electrolyte solution holding container 4. The supply unit 11 and the discharge unit 12 include an electrolyte tank, appropriate piping, and a valve mechanism.

  In the air battery C3, the temperature difference between the electrolyte solution 3 of the electrode portion 4A and the heat dissipation portion 4B electrolyte solution 3 in the electrolyte holding container 4 is further increased by cooling the heat dissipation portion 4B with the electrolyte that is a fluid. In addition, the dissolution of the precipitate Q in the electrode portion 4A can be promoted, and the precipitation and separation of the precipitate Q in the heat radiation portion 4B can be more reliably performed. Further, in the fluid flow path 7, heat exchange is performed between the heat radiating portion 4 </ b> B and the electrolytic solution, and the discharge efficiency can be further improved by supplying the preheated electrolytic solution to the positive electrode 1.

  In the air battery C <b> 4 shown in FIG. 4, the heat radiating part 4 </ b> B of the electrolyte solution holding container 4 includes a plurality of heat pipes 13. The heat pipe 13 has a well-known structure in which a volatile liquid is sealed in the pipe, and dissipates internal heat to the outside by being provided through the wall portion of the electrolyte solution holding container 4.

  The air battery C4 is also provided with the heat pipe 13 in the heat radiating part 4B, so that the temperature difference between the electrolytic solution 3 of the electrode part 4A and the heat radiating part 4B electrolytic solution 3 in the electrolytic solution holding container 4 is further increased. The dissolution of the precipitate Q in the part 4A can be promoted, and the precipitation and separation of the precipitate Q in the heat radiation part 4B can be more reliably performed.

  The air battery C5 shown in FIG. 5 includes a heat dissipation promoting part 2A in which the metal negative electrode 2 extends to the outside of the battery and is joined to the heat dissipation part 4B of the electrolyte holding container 4. In the air battery C5, the metal negative electrode 2 and the heat radiating part 4B (casing 4C) of the electrolyte holding container 4 are made of the same metal and integrated. The material of the metal negative electrode 2 and the heat dissipation part 4B is aluminum (Al) or an aluminum alloy. In addition, a plurality of fins 2B for heat dissipation are integrally formed in the heat dissipation promoting portion 2A of the metal negative electrode 2 in the illustrated example.

  In the air battery C5, the heat dissipation function of the heat dissipation part 4B of the electrolyte holding container 4 is improved by the heat dissipation promoting part 2A of the metal negative electrode 2, and at this time, the metal negative electrode 2 and the heat dissipation part 4B (casing 4C) are made of the same metal. Therefore, the heat radiation function of the heat radiation part 4B is further improved. In addition, since aluminum or an aluminum alloy is adopted as the material of the metal negative electrode 2 and the heat radiating part 4B, the thermal resistance is small, and the heat radiating function of the heat radiating part 4B is further improved.

  Thereby, the air battery C5 increases the temperature difference between the electrolytic solution 3 of the electrode portion 4A and the heat radiating portion 4B electrolytic solution 3 in the electrolytic solution holding container 4, and promotes dissolution of the precipitate Q in the electrode portion 4A. Precipitation and separation of the precipitate Q in the heat radiation part 4B can be performed more reliably.

  In the air battery C6 shown in FIG. 6, the heat radiating portion 4B of the electrolyte solution holding container 4 is connected to other solid structures so as to be able to conduct heat. The solid structure is an exterior material 14 that houses the battery, a device main body 15 that uses the battery as a power source, and the like.

  In the previous embodiment, the air battery C6 releases the heat of the heat radiating part 4B to a fluid that is a gas or a liquid, whereas the heat of the heat radiating part 4B is a solid (the exterior material 14 or the device main body 15). To a solid structure). Thus, a temperature difference is provided between the electrolyte solution 3 of the electrode portion 4A and the heat dissipation portion 4B electrolyte solution 3 in the electrolyte holding container 4, and the dissolution of the precipitate Q in the electrode portion 4A is promoted, and the precipitate in the heat dissipation portion 4B. Q can be more reliably deposited and separated.

  In an air battery C7 shown in FIG. 7, the electrolyte holding container 4 has an electrode portion 4A at the center portion and heat radiating portions 4B on both sides thereof. The heat sink 4B is provided with a heat sink 5 such as a heat sink. In the air battery C7, the electrolytic solution holding container 4 has a structure in which the precipitate Q generated from the electrolytic solution 3 is accumulated in the heat radiation portion 4B.

  In the air battery C7, the electrolytic solution 3 circulates between the electrode unit 4A and the heat radiating unit 4B by generating convection due to a temperature difference between the electrode unit 4A and the heat radiating unit 4B in the electrolytic solution holding container 4. Such circulation of the electrolytic solution 3 also occurs in the air battery (C1) shown in FIG. 1, for example. However, in the air battery (C1) shown in FIG. 1, since the electrode part 4A and the heat radiating part 4B are arranged vertically, for example, convection occurs according to the temperature distribution of each part. Therefore, the circulation flow is not uniform.

  On the other hand, the air battery C7 flows from the upper part of the central electrode part 4A to the heat radiating parts 4B and 4B on both sides as shown by arrows in the drawing, and from the lower part of each heat radiating part 4 to the electrode part 4A. A uniform circulating flow is generated that returns to Thus, the air battery C7 promotes dissolution of the precipitate Q in the electrode portion 4A, and precipitates and separates the precipitate Q in the heat dissipation portion 4B. In particular, in the heat radiation part 4B, the precipitate Q can be separated from the electrolyte solution 3 by being precipitated by its own weight and a circulating flow.

  An air battery C8 shown in FIG. 8 includes an electrolyte holding container 4 similar to that shown in FIG. 7, and the electrolyte holding container 4 transfers the electrolyte 3 between the electrode portion 4A and the heat radiating portion 4B. A circulation flow generating means 16 for circulation is provided. As the circulating flow generating means 16, for example, a pump, a screw, various kinds of stirrers and the like can be employed. In the air battery C8, the electrolytic solution holding container 4 has a structure in which the precipitate Q generated from the electrolytic solution 3 is accumulated in the heat radiation part 4B.

  In the air battery C8, the circulation flow generating means 16 actively forms a circulation flow indicated by an arrow in the figure, and dissolves the precipitate Q in the electrode portion 4A and deposits the precipitate Q in the heat radiating portion 4B. The efficiency of separation can be further increased. In particular, in the heat radiation part 4B, the precipitate Q can be separated from the electrolyte solution 3 by being precipitated by its own weight and a circulating flow.

  The air battery C9 shown in FIG. 9 includes the same electrolytic solution holding container 4 as that shown in FIG. 7, and the electrolytic solution holding container 4 puts the precipitate Q generated from the electrolytic solution 3 into the heat radiation part 4B. It has a structure to accumulate. In this embodiment, a filter 17 is arranged in the heat dissipation part 4B as a structure for accumulating the precipitate Q in the heat dissipation part 4B. The filter 17 in the illustrated example is disposed on a slightly lower side of the central portion in the heat radiating portion 4B, and has a box shape with the upper side opened so that the accumulated precipitate Q does not flow out.

  In the air battery C9, the electrolytic solution 3 circulates between the electrode unit 4A and the heat radiating unit 4B by generating convection due to a temperature difference between the electrode unit 4A and the heat radiating unit 4B in the electrolytic solution holding container 4. Thereby, the air battery C9 promotes dissolution of the precipitate Q in the electrode portion 4A and deposits and separates the precipitate Q in the heat dissipation portion 4B. And in the thermal radiation part 4B, the precipitate Q can be reliably isolate | separated from the electrolyte solution 3 with the circulation flow and the filter 17, and this can be accumulate | stored.

  The air battery C10 shown in FIG. 10 includes the same electrolyte solution holding container 4 as that shown in FIG. 7, and the electrolyte solution holding container 4 puts the precipitate Q generated from the electrolyte solution 3 into the heat radiating portion 4B. It has a structure to accumulate. In this embodiment, as a structure for accumulating the precipitate Q in the heat radiating portion 4B, an accommodation space 18 for the precipitate Q is provided in the lower portion in the heat radiating portion 4B.

  In the air battery C10, the electrolytic solution 3 circulates between the electrode unit 4A and the heat radiating unit 4B by causing convection due to a temperature difference between the electrode unit 4A and the heat radiating unit 4B in the electrolytic solution holding container 4. Thereby, the air battery C10 promotes dissolution of the precipitate Q in the electrode portion 4A, and deposits and separates the precipitate Q in the heat dissipation portion 4B. And in the thermal radiation part 4B, the deposit Q can be settled by the dead weight and the circulation flow, and can be accommodated in the accommodation space 18, and the deposit Q can be reliably separated from the electrolyte solution 3 and accumulated.

  FIG. 11 is a diagram showing an embodiment of an air battery module including an air battery according to the present invention. The illustrated air battery module M includes a plurality of air batteries C1 (five in the illustrated example) shown in FIG. 1, and has a structure in which a plurality of air batteries C1 are connected in series. In the air battery module M, the heat radiating portion 4B of each air battery C1 includes a heat sink 5 including a plurality of heat radiating plates and a fluid flow path 7 through which gas or liquid flows. And in the fluid flow path 7, the thermal radiation part 4B of each air battery C1 is arrange | positioned.

  The fluid that flows through the fluid flow path 7 is not particularly limited as long as it can cool the heat radiating portion 4B. Also, as in the embodiment shown in FIG. 2 and FIG. 3, it is naturally possible to use air or an electrolytic solution for the fluid, which preheats the air or the electrolytic solution. The use is effective in improving the discharge efficiency.

  In the air battery module M, in each air battery C1, the dissolution of the precipitate Q at the electrode portion 4A and the precipitation and separation of the precipitate Q at the heat radiating portion 4B are performed. In addition, there is no need to circulate the electrolyte solution outside the battery, and the device structure can be simplified and the size and weight can be reduced.

  Further, the air battery module M can be used as a power source mounted on a moving body such as an automobile, a train, and a ship, and as described above, simplification of the device structure and weight reduction of the device can be realized. It is very suitable for a mobile power source that is narrowly limited.

  The configuration of the air battery and the air battery module of the present invention is not limited to the above-described embodiment, and details of the configuration such as the material, shape, and number of each component can be changed as appropriate. In addition, the air battery has a characteristic configuration of each embodiment, that is, a heat dissipation promoting portion 2A of the metal negative electrode 2, a heat sink 5, an electrode heat retaining means 6, a heat pipe 13, a solid structure (14, 15), and a circulation flow generation. The structure of the means 16, the filter 17, the accommodation space 18 for the precipitate Q, and the like can be appropriately combined and systemized, thereby promoting the dissolution of the precipitate in the electrode portion 4A, and the precipitate in the heat radiating portion 4B. It is possible to further improve the function of precipitation and separation. Furthermore, the air battery module can also connect each air battery or air battery group in parallel as needed.

C1 to C10 Air battery M Air battery module 1 Positive electrode 2 Metal negative electrode 2A Heat radiation promotion part 3 Electrolytic solution 4 Electrolyte holding container 4A Electrode part 4B Heat radiation part 5 Heat sink 7 Fluid flow path 8 Air supply path 10 Electrolyte supply path 13 Heat pipe 14 Exterior material (solid structure)
15 Device body (solid structure)
16 Circulating flow generation means 17 Filter 18 Storage space

Claims (23)

A positive electrode, a metal negative electrode, and an electrolytic solution holding container into which an electrolytic solution is injected,
The electrolytic solution holding container includes an electrode portion interposed between the positive electrode and the metal negative electrode, and a heat radiating portion extending to the outside of the battery, and that the electrolytic solution can be circulated between the electrode portion and the heat radiating portion. Features an air battery.   2. The air battery according to claim 1, further comprising a fluid flow path through which gas or liquid flows, and a heat radiating portion of the electrolyte holding container disposed in the fluid flow path.   The air battery according to claim 2, further comprising an air supply path that supplies air that has passed through the fluid flow path to the positive electrode.   3. The air according to claim 2, further comprising an electrolyte solution supply path for supplying the electrolyte solution that has passed through the fluid channel to the electrolyte solution holding container. battery.   The air battery according to any one of claims 1 to 4, wherein the heat dissipation part of the electrolyte solution holding container includes a heat pipe.   The air battery according to any one of claims 1 to 5, wherein the heat radiating portion of the electrolyte solution holding container includes a heat sink.   The air battery according to any one of claims 1 to 6, wherein the heat radiating portion of the electrolyte solution holding container is formed of a metal having a small thermal resistance.   The air battery according to any one of claims 1 to 7, wherein the metal negative electrode includes a heat dissipation promoting part that extends to the outside of the battery and is joined to the heat dissipation part of the electrolyte solution holding container. .   The air battery according to claim 8, wherein the metal negative electrode and the heat radiating portion of the electrolytic solution holding container are made of the same metal and integrated.   The air battery according to any one of claims 1 to 9, wherein the heat radiating portion of the electrolyte solution holding container is connected to another solid structure so as to be able to conduct heat.   The air battery according to claim 10, wherein the solid structure is an exterior material that accommodates the battery body.   The air battery according to claim 10, wherein the solid structure is a device main body using the battery as a power source.   The electrolyte solution circulates between the electrode part and the heat dissipation part by generating convection due to a temperature difference between the electrode part and the heat dissipation part in the electrolyte holding container. The air battery according to item. The air battery according to any one of claims 1 to 13, wherein the electrolytic solution holding container includes a circulating flow generating means for circulating the electrolytic solution between the electrode portion and the heat radiating portion.
  The air battery according to claim 1, wherein the electrolytic solution holding container has a structure in which deposits generated from the electrolytic solution are accumulated in a heat radiation portion.   The air battery according to claim 15, wherein a heat radiating portion is provided below the electrode portion as a structure for accumulating the precipitate in the heat radiating portion.   The air battery according to claim 15 or 16, wherein a filter is disposed in the heat dissipation part as a structure for accumulating the precipitate in the heat dissipation part.   The air battery according to claim 15 or 16, wherein an accommodation space for the precipitate is provided in the heat dissipation portion as a structure for accumulating the precipitate in the heat dissipation portion.   The air battery according to any one of claims 1 to 18, further comprising electrode heat retaining means for retaining the electrode portions of the positive electrode, the metal negative electrode, and the electrolytic solution holding container.   The air battery according to claim 1, wherein the metal negative electrode is aluminum or an aluminum alloy.  An air battery module comprising a plurality of the air batteries according to any one of claims 1 to 20.   The air battery module according to claim 21, wherein a plurality of air batteries are connected in series.   The air battery module according to claim 22, wherein the air battery module is used as a power source mounted on a moving body.

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