JP2014194887A - Liquid injection air cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem of a conventional air cell that liquid leakage may occur from the joint of an electrolyte container and a battery stack in such a situation as vibration, inclination and acceleration act.SOLUTION: A liquid injection air cell C1 includes a cell aggregation S formed by arranging a plurality of single cells 1 having a housing section 1C of liquid 2 for electrolyte, and having a liquid injection port H to each housing section 1C located at an upper part, a liquid storage tank T arranged on the upper side of the cell aggregation S and storing the liquid 2 for electrolyte, tank opening means 5, 7, and 8 for opening the lower part of the liquid storage tank T, and a manifold 6 for forming a closed space from the part of the liquid storage tank T opened by the tank opening means to each liquid injection port H of the cell aggregation. Liquid injection can be performed reliably without causing liquid leakage, even in such a situation as vibration, inclination and acceleration act.

Description

  The present invention relates to an air battery using oxygen as a positive electrode active material, and more particularly to a liquid injection type air battery in which an electrolyte liquid is injected during use.

  As a conventional liquid injection type air battery, there was one described in Patent Document 1 as an air zinc battery. The zinc-air battery described in Patent Document 1 includes an electrolyte container and a battery stack. The electrolyte container is filled with an electrolyte, and includes an electrolyte discharge port protruding downward and an electrolyte sealing film that closes the discharge port. On the other hand, the battery stack is composed of a plurality of cathode tubes and anode tubes, and includes an electrolyte injection port protruding upward and a plug-in tubular portion arranged in the injection port.

  In the above-described zinc-air battery, an electrolyte container and a battery stack are placed in a battery casing in an up-and-down direction. At this time, the electrolyte outlet of the electrolyte container and the electrolyte inlet of the battery stack are spaced apart from each other by a predetermined interval. Hold in a state of facing each other. In this zinc-air battery, the upper part of the electrolyte container is pushed from the outside to lower the electrolyte container, and the electrolyte sealing film at the electrolyte discharge port is torn by the insertion tubular part of the electrolyte injection port, whereby the electrolyte solution in the electrolyte container is Power is supplied to the stack and power generation is started.

Special table 2008-535156

  However, since the conventional air battery as described above is configured to inject the liquid by pushing the electrolyte container and causing the container and the battery stack to communicate with each other, for example, when used for an auxiliary power source for an automobile, etc. There is a possibility that liquid leakage may occur from the joint between the electrolyte container and the battery stack in the middle, that is, in a situation where vibration, inclination, and acceleration are applied.

  The present invention has been made in view of the above-described conventional situation, and can perform liquid injection without causing liquid leakage even under a situation where vibration, inclination, and acceleration act. It aims at providing a liquid injection type air battery.

  A liquid injection type air battery according to the present invention includes a cell assembly in which a plurality of single cells each having an electrolyte liquid storage portion are arranged, and a liquid injection port to each storage portion is disposed at the top, and the cell integration body A liquid storage tank is provided which is disposed on the upper side and stores the electrolyte liquid. The liquid injection type air battery forms a closed space between the tank opening means for opening the lower part of the liquid storage tank and the liquid injection tank opening by the tank opening means to each liquid injection port of the cell assembly. A manifold is provided, and the above configuration is used as means for solving the conventional problems.

  In the above configuration, the electrolyte liquid includes the electrolyte solution itself or a liquid (water) for melting the electrolyte solute material mixed in the single cell.

  Since the liquid injection type air battery of the present invention employs the above-described configuration, liquid injection can be reliably performed without causing liquid leakage even during traveling where vibration, inclination, and acceleration act. It is very effective as an auxiliary power source for the power supply.

In 1st Embodiment of the injection type air battery of this invention, it is sectional drawing (A) which shows the state before injection | pouring of the electrolyte liquid, and sectional drawing (B) based on the AA line in FIG. Sectional view (A) based on line BB in FIG. 1A, a plan view (B) for explaining the movable plate of the tank opening means and the opening cap, an enlarged plan view (C) of the opening cap, and a side view (D) It is. It is sectional drawing (A) which shows the state after injection | pouring of the electrolyte liquid of the injection type air battery shown in FIG. 1, and sectional drawing (B) based on the AA line in FIG. In 2nd Embodiment of the injection type air cell of this invention, it is sectional drawing which shows the state before injection | pouring of the electrolyte liquid. In 3rd Embodiment of the injection type air battery of this invention, it is sectional drawing which shows the state after injection | pouring of the electrolyte liquid. It is sectional drawing (A) explaining 4th Embodiment of the injection type air cell of this invention, and sectional drawing (B) based on the AA line in FIG. It is sectional drawing (A) explaining 5th Embodiment of the injection type air cell of this invention, and sectional drawing (B) based on the BB line in FIG.

<First Embodiment>
A liquid injection type air battery C1 shown in FIGS. 1 to 3 includes a cell assembly S in which a plurality of single cells 1 are arranged, and a liquid storage tank that is disposed above the cell assembly S and stores an electrolyte liquid 2. T is provided. The liquid injection type air battery C includes a tank opening means for opening the lower part of the liquid storage tank T, and a manifold 6 for connecting the liquid storage tank T and the cell assembly S. Here, for convenience of explanation, an arrow P shown in FIGS. 1 to 3 is an air flow direction, and the embodiments described later are also the same.

  As shown in FIG. 1, the unit cell 1 has an accommodating portion 1 </ b> C for an electrolyte liquid 2 between a flat air electrode 1 </ b> A and a flat metal negative electrode 1 </ b> B. A cell integrated body S is constituted by the cell 1 and the cell frame F holding these cells. As shown in FIG. 1B, each single cell 1 in the cell assembly S is arranged at a predetermined interval in a direction orthogonal to the air flow direction P, and an air flow path is provided between adjacent single cells 1. Af is formed. A current collector (not shown) that electrically connects adjacent single cells is formed in the air flow path Af. Such a cell assembly S may be referred to as an assembled battery.

  The frame F closes the upper and lower ends of each single cell 1, the front and rear end portions in the air flow direction P, and the upper end portions of the adjacent single cells 1 in a liquid-tight (water-tight) manner. The liquid injection port H communicated with the accommodating portion 1C of each single cell 1 is arranged in the center of each. Thereby, the accommodating part 1 </ b> C of each single cell 1 is closed by the frame F in the vertical direction and before and after the air flow direction P, and is opened only to the upper side by the respective liquid inlets H. In this way, the cell assembly S has a configuration in which a plurality of unit cells 1 each having the accommodating portion 1C for the electrolyte liquid 2 are arranged, and the liquid inlets H to the respective accommodating portions 1C are arranged in the upper portion. ing.

  In addition, the cell assembly S has an excess between the liquid injection port H on the upper side of the accommodating portion 1C of each single cell 1, more specifically on the air electrode 1A, the metal negative electrode 1B, and the accommodating portion 1C. It has a surplus holding region 9 that accommodates the electrolyte liquid 2.

  Although the air electrode 1A constituting the single cell 1 is not shown in detail, it is composed of 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 positive electrode catalyst component include platinum (Pt), gold (Au), silver (Ag), iridium (Ir), palladium (Pd), osmium (Os), cobalt (Co), nickel (Ni ), Metals such as manganese (Mn) and alloys thereof, oxides of these metals, composite oxides, sulfides, porphyrin-type organic metals, phthalocyanine-type organic metals, WC, Mo2C, carbon such as carbon black and activated carbon, etc. A well-known thing can be used. 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.

  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. The catalyst carrier may be any catalyst carrier as long as it has a specific surface area for supporting the catalyst component in a desired dispersed state and has sufficient electron conductivity, and known carbon can be used.

  The liquid-tight ventilation member is a member having liquid-tightness with respect to the electrolyte liquid and air-permeable with respect to oxygen. This liquid-tight ventilation member uses a water-repellent film such as polyolefin or fluororesin so that the electrolyte liquid can be prevented from leaking to the outside, and on the other hand, a large number can supply oxygen to the positive electrode member. Have fine pores.

  The metal negative electrode 1B constituting the single cell 1 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.

  The electrolyte liquid 2 includes an electrolytic solution itself or a liquid (water) for melting a solid electrolyte mixed in the single cell 1. In the case of an electrolytic solution, 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 used. Can do.

  The liquid storage tank T has a structure in which a deformable internal tank 4 is accommodated in the housing 3. The housing 3 of this embodiment has a slightly flat rectangular parallelepiped shape, and has an opening 3C opposite to the upper side of the liquid injection port H group of the frame F on the bottom surface as shown in FIG. In addition, the movable plate 5 constituting the tank opening means is assembled in the opening 3C. The opening 3 </ b> C has a horizontal portion that extends in the width direction of the bottom surface of the housing 3 (a direction orthogonal to the air flow direction P) and a vertical portion that is continuous with both side surfaces of the housing 3.

  On the other hand, the movable plate 5 is a plate member having a width dimension corresponding to the width of the opening 3C and a longitudinal dimension longer than the width of the bottom surface of the housing 3, and has a slit 5A in the center. The movable plate 5 is prevented from moving upward at the vertical portions on both sides of the opening 3C, and passes through the bottom of the housing 3 as shown in FIG.

  The internal tank 4 is, for example, a resin bag. In this case, the resin to be used is not particularly limited as long as it can be freely deformed. However, when the electrolyte liquid (electrolyte solution) 2 is an alkaline aqueous solution, at least a portion in contact with the electrolyte liquid 2 is used. It is necessary to use an alkali resistant resin. Specific examples include polypropylene, polyethylene, nylon, and Teflon (registered trademark). The inner tank 4 should not be made of a material that can be broken to cause liquid leakage when deformed.

  The internal tank 4 of this embodiment stores the electrolyte liquid 2 and is partially lifted by the movable plate 5 assembled to the opening 3C of the housing 3 as shown in FIG. In the housing 3. In addition, it is very effective that the internal tank 4 is configured to be easily contracted and deformed, for example, formed into a bellows shape or provided with an appropriate crease, and has a configuration that reduces the volume as much as possible when contracted and deformed. . The shrinkage deformation of the internal tank 4 is a deformation that reduces the volume of the internal tank 4 and does not require a stretchable material.

  In this embodiment, the tank opening means is a means for opening the lower part of the internal tank 4 of the liquid storage tank T, and is constituted by the movable plate 5, a pair of electromagnetic actuators 7 and 7, and a plurality of opening caps 8. It is. As shown in FIG. 1 (B), the electromagnetic actuators 7 and 7 are fixed to both the left and right sides of the housing 3 with respect to the air flow direction P, and the output shaft directed downward is connected to the end of the movable plate 5. Thus, the movable plate 5 is held at the upper limit.

  As shown in FIGS. 2B to 2D, the opening cap 8 is a rectangular tube-like member, and has a saw blade-like cutting edge 8A at the upper end. A plurality of opening caps 8 (five in the illustrated example) are arranged in series on the upper surface of the frame F of the cell assembly S within a range corresponding to the slits 5A of the movable plate 5. Here, the slit 5A is within the range of the liquid injection port H group of the frame F due to the positional relationship between the opening 3C of the housing 3 and the movable plate 5 described above. Further, in the opening cap 8, the cutting edge 8 </ b> A is positioned on the lower side of the upper surface of the movable plate 5. At this time, since the internal tank 4 is partially lifted by the movable plate 5 as described above, it is separated from the cutting edge 8A of the opening cap 8. In FIG. 1B, only a part of the opening cap 8 is shown enlarged.

  As described above, the liquid injection type air battery C <b> 1 has a structure in which the liquid storage tank T houses the deformable internal tank 4 in the housing 3. The liquid injection type air battery C1 includes a movable plate 5 in which the tank opening means partially lifts and holds the bottom of the internal tank 4, a drive unit (electromagnetic actuator 7) for lowering the movable plate 5, and a manifold 6 It is configured to include an opening cap 8 that is disposed inside and cuts and opens the bottom of the internal tank 4 that is lowered together with the movable plate 5.

  The manifold 6 is a deformable annular body that liquid-tightly connects the liquid storage tank T and the cell assembly S, and is formed of the same material as the internal tank 4 in order to ensure resistance to the electrolyte liquid 2. be able to.

  More specifically, the manifold 6 has an upper end portion that surrounds the opening portion of the liquid storage tank T by the tank opening means, that is, a portion that surrounds a portion facing the opening cap 8 on the bottom surface of the internal tank 4. It is liquid-tightly adhered to. The upper end of the manifold 6 is also bonded to the upper surface of the movable plate 5. At this time, the manifold 6 is bonded to the upper surface of the movable plate 5 together with the bottom of the internal tank 4. The manifold 6 passes through the inside of the slit 5 </ b> A of the movable plate 5 at the intermediate portion.

  Furthermore, the lower end of the manifold 6 is liquid-tightly bonded to a portion surrounding the liquid inlet H group of the cell assembly S. In this embodiment, the manifold 6 has a frame portion 6A on the entire periphery of the lower end portion, and the frame portion 6A is bonded and fixed to the entire periphery of the upper end portion of the cell assembly S. In this way, the manifold 6 forms a closed space between the opening of the liquid storage tank T by the tank opening means and each liquid inlet H of the cell assembly S.

  Furthermore, the liquid injection type air battery C <b> 1 includes a distribution case 11 that accommodates the cell aggregate S and the liquid storage tank T. The distribution case 11 has an air inlet 11A on the upstream side (right side in FIG. 1 (A)) in the air circulation direction P, and an outlet 11B on the other side. The distribution case 11 forms a flow path from the introduction port 11A to the discharge port 11B through each air flow path Af between the single cells 1.

  In addition to the above-described configuration, the liquid injection type air battery C1 has a blower (not shown) disposed on the inlet side of the inlet 11A of the distribution case 11, a controller that controls the electromagnetic actuator 7, the blower, and the like, and an operation unit. The switch can be configured to include such switches. Further, the amount of the electrolyte liquid 2 stored in the liquid storage tank T is a total volume of the accommodating portion 1C and the excess holding region 9 of each single cell 1 or a slightly smaller amount than the total volume.

  The injection type air battery C1 having the above-described configuration is mounted on the vehicle as an auxiliary power source of an automobile, for example, and can be activated by a switch disposed in the vicinity of the driver's seat. That is, when both electromagnetic actuators 7 are actuated, the liquid injection type air cell C1 moves the output shafts of both electromagnetic actuators 7 downward so that the state shown in FIG. Descends. Then, the bottom of the internal tank 4 is lowered together with the movable plate 5, the opening base 8 protrudes from the slit 5 </ b> A relative to the downward movement of the movable plate 5, and the bottom of the internal tank 4 is cut by the cutting blade 8 </ b> A of the opening base 8. Open. At this time, since the opening cap 8 has a rectangular tube shape, it does not hinder the flow of the electrolyte liquid 2 at all.

  As a result, in the injection type air battery C1, the electrolyte liquid 2 in the internal tank 4 flows down in the manifold 6 and is injected from each injection port H of the frame F to the accommodating portion 1C of each unit cell 1. Is started. At this time, the manifold 6 has a function of distributing the electrolyte liquid 2 flowing out from one place at the bottom of the liquid storage tank T to the accommodating part 1C of each unit cell 1, and a function of preventing the liquid leakage and scattering of the electrolyte liquid 2. Have The manifold 6 also has a function of redistributing the overflowing electrolyte liquid 2 to the deficient single cell 1 even if distribution to each single cell 1 is imbalanced due to the action of vibration, inclination and acceleration. And the supply amount of the electrolyte liquid 2 to each unit cell 1 can be made uniform.

  When the electrolyte liquid 2 is supplied to the accommodating portion 1C of each unit cell 1 as described above, the liquid injection type air battery C1 has air (oxygen) in the air electrode 1A facing the outside or the air flow path Af. Since power is supplied, power generation (discharge) is started immediately.

  The liquid injection type air battery C1 includes the cell assembly S, the liquid storage tank T for the electrolyte liquid 2, the tank opening means (5, 7, 8), and the manifold 6. Therefore, the electrolyte liquid It is easy to automate the injection of No. 2, and even under conditions where vibration, tilt and acceleration are applied, the injection can be performed reliably without causing leakage, and power generation is started immediately. obtain. Therefore, the liquid-injected air battery C1 can reliably inject liquid even when traveling when used as an auxiliary power source for automobiles, and can reliably prevent liquid leakage. It is very effective for application to a high-power air battery using liquid 2.

  In addition, the liquid injection type air battery C1 has the manifold 6 liquid-tightly bonded to the part surrounding the open part of the liquid storage tank T and the part surrounding the liquid injection port H group of the cell assembly S. As a result, leakage and scattering of the electrolyte liquid 2 during injection can be more reliably prevented.

  Further, the liquid injection type air battery C1 has a structure in which a liquid storage tank T accommodates an internal tank 4 that can be deformed in a housing 3, and a tank opening means includes a movable plate 5 and a movable plate 5. Since the drive unit (electromagnetic actuator 7) and the opening cap 8 arranged in the manifold 6 are provided, the movable unit such as the movable plate 5 and the electromagnetic actuator 7 does not touch the electrolyte liquid 2 at all. Even when stored, a reliable opening operation can be realized.

  The tank opening means may be a mechanism in which the opening cap 8 is moved upward by an actuator to open the internal tank. Further, it is possible to adopt a configuration provided with a movable cutting blade, a configuration in which the entire storage tank T is lowered and the lower portion thereof is opened, and the like. 5. If the electromagnetic actuator 7 and the opening cap 8 are employed, the movable part can be prevented from touching the electrolyte liquid 2 as described above, and the internal tank 4 can be opened with a small driving force. It can contribute to reduction in size and weight.

  Furthermore, since the injection type air battery C1 includes the deformable internal tank 4, the bottom of the internal tank 4 may be lowered by the weight of the electrolyte liquid 2 as the movable plate 5 is lowered. Is possible. On the other hand, in the liquid injection type air cell C1 of this embodiment, the bottom of the internal tank 4 is bonded to the upper surface of the movable plate 5 together with the upper end of the manifold 6 as described above. The bottom part is lowered integrally, and the bottom part of the internal tank 4 can be cut and opened more reliably by the opening cap 8.

  Furthermore, the liquid-injected air battery C1 has a surplus holding region 9 for accommodating the surplus electrolyte liquid 2 on the upper side of the accommodating portion 1C of each unit cell 1 because the cell assembly S has an electrolyte. The working liquid 2 is distributed to each single cell 1 without overflowing into the manifold 6. Thereby, even when vibration, inclination, and acceleration act, the electrolyte liquid 2 can be distributed to each single cell 1 almost evenly. Furthermore, by injecting the electrolyte liquid 2 into each single cell 1 without leaving an excess, it is possible to prevent a short circuit caused by the electrolyte liquid 2 between adjacent single cells 1, so-called a liquid junction, and to generate power by leakage. Loss and unnecessary heat generation can be suppressed.

Second Embodiment
FIG. 4 is a view for explaining a second embodiment of the injection type air battery according to the present invention. In the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In addition to the basic configuration equivalent to the previous embodiment, the liquid injection type air battery C2 shown in FIG. 4 has an electrolyte liquid 2 between the cell inlet S and the container 1C. Has a liquid introduction part 12 for introducing the liquid into each accommodating part 1C. Here, the space from the liquid injection port H to the accommodating portion 1C is the surplus holding region 9 described in the previous embodiment.

  The liquid introduction part 12 is formed in the surplus holding region 9 so as to have substantially the same width as the liquid injection port H and protrudes to a predetermined height, and is continuously provided from the upper part of the single cell 1 to the liquid injection port H. It is. It is also effective to apply a hydrophilic treatment to the surface of the liquid introducing portion 12 in order to improve the liquid introducing property.

  As with the first embodiment, the liquid injection type air battery C2 having the above configuration can reliably perform liquid injection without causing liquid leakage even under conditions where vibration, inclination, and acceleration are applied. . Moreover, since the liquid introduction type air battery C2 is provided with the liquid introduction part 12 between each injection hole H and the accommodating part 1C, the electrolyte liquid 2 that has flowed into the injection hole H during the injection. Is absorbed into the liquid introduction part 12, and the electrolyte liquid 2 can be quickly permeated and diffused into the accommodating part 1C. Thereby, shortening of injection time etc. can also be aimed at.

<Third Embodiment>
The liquid injection type air battery C3 shown in FIG. 5 has a liquid junction between adjacent single cells 1 around each liquid injection port H in addition to the basic configuration equivalent to the previous embodiment. A liquid junction prevention unit 13 is provided for preventing this. The liquid junction prevention part 13 of this embodiment is a water repellent coating film formed in a range from the upper surface of the frame F to the inner surface of the liquid injection port H.

  The liquid injection type air battery C3 having the above configuration can reliably perform liquid injection without causing liquid leakage even under conditions where vibration, inclination and acceleration are applied, as in the previous embodiments. it can. Moreover, since the liquid injection type air battery C3 has a water-repellent coating as the liquid junction prevention part 13 on the peripheral surface of each liquid injection hole H, it is for electrolyte around the opening part of the liquid injection hole H after the liquid injection. The liquid 2 is repelled to prevent the liquid from remaining. Thereby, the short circuit (liquid junction) by the liquid 2 for electrolyte of adjacent single cells 1 can be prevented, and the power generation loss and unnecessary heat_generation | fever by electrical leakage can be prevented more reliably.

<Fourth embodiment>
In addition to the basic configuration equivalent to that of the previous embodiment, the liquid injection type air battery C4 shown in FIG. 6 includes a cell assembly S on the upper part thereof, and a liquid injection port H to each accommodating portion 1C. A liquid return port R to the container 1C is provided. Further, in the liquid injection type air battery C4, the cell assembly S has an inclination on the upper surface thereof, and the liquid injection port H is disposed on the lower side of the inclination and the liquid return port R is provided on the upper side of the inclination. It is arranged.

  In the liquid injection type air battery C4 of this embodiment, the upper part of the cell assembly S, that is, the upper part of the frame F is inclined downward toward the introduction port 11A with the discharge port 11B side of the distribution case 11 as the upper side. A liquid injection port H and an upper liquid return port R are arranged. The liquid injection port H and the liquid return port R are disposed in the manifold 6 since the frame portion 6A of the manifold 6 is bonded to the upper outer periphery of the cell assembly S.

  The liquid injection type air battery C4 having the above-described configuration can reliably perform liquid injection without causing liquid leakage even under conditions where vibration, inclination, and acceleration are applied, as in the previous embodiments. it can. In addition, since the liquid injection type air battery C4 is provided with the liquid injection port H and the liquid return port R at the upper part of the cell assembly S, an imbalance in distribution to each single cell 1 occurs due to the action of vibration, inclination and acceleration. However, the electrolyte liquid 2 overflowing the manifold 6 can be distributed to the single cells 1 that are lacking. Thereby, the supply amount of the electrolyte liquid 2 to each unit cell 1 is made uniform, and the output of each unit cell 1 is also made uniform.

  Here, the liquid injection type air battery C4 flows out from the liquid storage tank T to the manifold 6 when, for example, the liquid injection port H and the liquid return port R are provided with the upper portion of the cell assembly S horizontal. The electrolyte liquid 2 thus supplied is supplied from the liquid injection port H and the liquid return port R to the accommodating portion 1C. At this time, the liquid injection type air battery C4 causes the electrolyte liquid 2 to pass through the liquid injection port H and the liquid return port R to the manifold 6 when distribution imbalance occurs due to the action of vibration, inclination and acceleration. Distribute to the missing single cells 1 while overflowing.

  That is, the liquid injection port H and the liquid return port R have functions equivalent to each other, and by providing both of them, even when an imbalance of distribution to each single cell 1 occurs, it can be quickly redistributed. it can. Therefore, it is desirable to arrange the liquid injection port H and the liquid return port R as separated as possible.

  In the liquid injection type air battery C4, as a more preferred embodiment, the upper part of the cell assembly S is inclined, the liquid return port R is disposed on the upper side, and the liquid injection port H is disposed on the lower side. Then, the electrolyte liquid 2 flowing out from the liquid storage tank T to the manifold 6 is mainly supplied from the liquid injection port H to the accommodating portion 1C. At this time, in the liquid injection type air battery C4, when an imbalance in the distribution of the electrolyte liquid 2 occurs, the electrolyte liquid 2 naturally overflows into the manifold 6 from the lower liquid injection port H. However, in particular, when vibration, inclination, and acceleration are applied, the liquid return port R, which is higher than the liquid injection port H, exhibits a compensation function for discharging the excess electrolyte liquid 2, and the manifold 6 has an electrolyte. The liquid 2 is overflowed and distributed to the single cells 1 that are lacking. In other words, the vehicle-mounted power source that receives the effects of vibration, tilt, and acceleration is more suitable.

  In addition, the liquid injection type air battery C4 has a liquid introduction part (see FIG. 4) in the surplus holding region 9 on the upper side of the accommodating part 1C, as in the second and third embodiments. A liquid junction prevention unit (see FIG. 5) can be provided around the liquid injection port H and the liquid return port R. In the above embodiment, the upper surface of the cell integrated body S is an inclined surface in one direction. However, a plurality of inclined surfaces can be provided, or a stepped step can be provided. However, considering the fluidity of the liquid, the inclined surface is more preferable than the step.

<Fifth Embodiment>
The liquid injection type air battery C5 shown in FIG. 7 includes two sets of a liquid storage tank T and a cell integrated body S connected by a manifold 6 in a distribution case 11. In the tank opening means, the movable plate 5 and a part of the electromagnetic actuator 7 are made common. In this embodiment, two sets of the liquid storage tank T and the cell assembly S are illustrated, but it is naturally possible to make the number of sets larger than that.

  In the liquid injection type air cell C5, the common tank opening means (5, 7, 8) simultaneously opens both the liquid storage tanks T, and passes through each manifold 6 to each cell stack S. An electrolyte liquid 2 is supplied (injected) to the single cell 1. Even in this liquid injection type air battery C5, liquid injection can be reliably performed without causing liquid leakage even under conditions where vibration, inclination and acceleration are applied, as in the previous embodiments. .

  The injection type air battery according to the present invention has, for example, a configuration in which a plurality of liquid storage tanks are arranged for a single cell assembly, or a single liquid storage tank is arranged for a plurality of cell integrations. Can be configured. However, if the liquid storage tank has a large capacity, when it is mounted on a vehicle, it may cause a wave (so-called sloshing) due to vibration, inclination, and acceleration, and may exert a force on peripheral devices and the vehicle body as a reaction. On the other hand, the injection type air battery C5 described above can substantially eliminate the influence of the wave by adopting a plurality of liquid storage tanks T and subdividing the electrolyte liquid 2. Further, the liquid storage tank T itself is also small in size, and it is easy to ensure the strength, so that it is suitable for storing the strongly alkaline electrolyte liquid 2.

  The liquid injection type air battery of the present invention is not limited to the above embodiments, and details of the configuration, such as the shape, number, and material of each part are within the scope of the present invention. It can change suitably and can also combine the structure of each embodiment.

C1 to C5 Injection type air battery H Injection port R Liquid return port S Cell assembly T Storage tank 1 Single cell 1C Housing 2 Electrolyte liquid 3 Housing 4 Internal tank 5 Movable plate (tank opening means)
6 Manifold 7 Electromagnetic actuator (tank opening means)
8 Opening cap (tank opening means)
9 Excess holding region 12 Liquid introduction part 13 Liquid junction prevention part

Claims (8)

A cell assembly in which a plurality of unit cells each having an electrolyte liquid storage portion are arranged, and a liquid injection port to each of the storage portions is arranged at the top;
A liquid storage tank disposed on the upper side of the cell assembly and storing the electrolyte liquid;
Tank opening means for opening the lower part of the liquid storage tank;
A liquid injection type air battery comprising a manifold that forms a closed space between an opening of a liquid storage tank by a tank opening means and each liquid injection port of a cell integrated body.   2. The liquid injection according to claim 1, wherein the manifold is liquid-tightly bonded to a portion surrounding the open portion of the liquid storage tank and a portion surrounding the liquid injection port group of the cell assembly. Air battery. The liquid storage tank has a structure that houses a deformable internal tank in the housing,
The tank opening means opens and opens the movable plate that partially lifts and holds the bottom of the internal tank, the drive unit that lowers the movable plate, and the bottom of the internal tank that is disposed in the manifold and descends together with the movable plate. The injection type air battery according to claim 1, further comprising a base.   4. The cell assembly according to claim 1, wherein the cell assembly has a surplus holding region that accommodates surplus electrolyte liquid above the accommodating portion of each single cell 1. Injection type air battery.   The cell assembly is provided with a liquid injection port to each storage unit and a liquid return port to each storage unit in an upper part thereof. Injection type air battery.   6. The cell assembly according to claim 5, wherein the cell assembly has an inclination on an upper surface thereof, and a liquid injection port is arranged on a lower side of the inclination and a liquid return port is arranged on an upper side of the inclination. Injection type air battery.   7. The cell assembly according to claim 1, further comprising a liquid introduction part for introducing the electrolyte liquid into each accommodation part while the cell assembly reaches the accommodation part from each liquid injection port. The liquid injection type air battery according to claim 1.   The cell integrated body has a liquid junction prevention part for preventing a liquid junction between adjacent single cells around each liquid injection port. Liquid-injected air battery as described in 1.

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