JP6340844B2 - Air battery cell and battery pack - Google Patents

Description

  The present invention relates to an air battery cell using oxygen as a positive electrode active material, and an assembled battery including a plurality of air battery cells.

  Examples of this type of air battery cell include those described in Non-Patent Document 1. The air battery cell described in Non-Patent Document 1 holds a pair of opposing positive electrodes by a frame, forms an accommodation space opened on one side between both positive electrodes, and arranges a negative electrode in the accommodation space In addition, the electrolyte solution is filled between the positive electrode and the negative electrode. The negative electrode is attached to a lid that is fixed to an open portion of the accommodation space.

Osaka Industrial Technology Laboratory Quarterly 37 [3] (1986) p. 34-36

  However, since the conventional air battery cell as described above has a structure in which the negative electrode is attached to the lid fixed to the open portion of the accommodation space, the lid portion must be disassembled in order to replace the negative electrode. There is a problem that it is difficult to easily replace the negative electrode, and it has been a problem to solve such a problem.

  The present invention has been made by paying attention to the above-mentioned conventional problems, and in an air battery cell including a pair of positive electrode plates and a negative electrode plate arranged therebetween, air that can easily replace the negative electrode plate. An object is to provide a battery cell, and an object is to provide an assembled battery including a plurality of the air battery cells.

An air battery cell according to the present invention includes a positive electrode structure in which an electrolyte accommodating space is formed between a pair of positive electrode plates, a negative electrode plate disposed in the electrolyte accommodating space, and a negative electrode holder attached to an end of the negative electrode plate. It has. The air battery cell, the positive electrode structure, wherein the receiving space of the electrolyte has a mounting slot for inserting a negative electrode plate, the negative electrode holding body, a negative electrode plate are rotatably connected to each other a pair of clamping members for clamping the end portion provided with a resilient member to maintain the holding state of interposing the negative electrode plate between both of the two sandwiching members, detachably attached to the attachment port of the cathode structure der is, the two clamping members, between the intermediate portion is rotatably connected, and with one side of the intermediate portion and the grip piece, for clamping the end portion of the other side of the intermediate portion and the negative electrode plate sandwiching piece city, the anode holder is characterized in the Rukoto that fit match inside the mounting opening of the clamping piece the cathode structure of the both clamping members.

  An assembled battery according to the present invention includes a plurality of the above-described air battery cells, and includes a housing that accommodates the air battery cells arranged at predetermined intervals. In the assembled battery, the housing has an opening on the negative electrode holder side of each air battery cell, and between the negative electrode holders of the adjacent air batteries and between the negative electrode holder of the air battery at the arrangement end. It is characterized in that a connecting member is mounted between the edges of the part.

In the air battery cell and the assembled battery according to the present invention, the negative electrode plate is attached to the electrolyte housing space from the attachment port of the positive electrode structure with the holding pieces of the both holding members constituting the negative electrode holding body attached to the end of the negative electrode plate. Is inserted, and the clamping pieces of the both clamping members are fitted inside the mounting opening . At this time, the negative electrode plate can be handled by the gripping pieces of both sandwiching members constituting the negative electrode holder. In this air battery cell and the assembled battery, since the negative electrode holder can be attached to and detached from the attachment port of the positive electrode structure, the negative electrode plate can be attached and detached by operating the negative electrode holder, and the negative electrode plate is replaced. In addition to being very easy to handle, a sufficient holding power of the negative electrode plate can be obtained with a simple structure, and the negative electrode plate can be easily replaced without touching the electrolyte .

It is side sectional drawing (A) explaining 1st Embodiment of the air battery cell concerning this invention, and sectional drawing (B) of a front side. It is each sectional drawing (A)-(C) explaining the process which removes a negative electrode plate. It is sectional drawing explaining 2nd Embodiment of an air battery cell concerning this invention, and one Embodiment of an assembled battery. It is a perspective view of the air battery cell shown in FIG.

<First Embodiment>
The air battery cell C1 shown in FIG. 1 schematically includes a positive electrode structure 3 in which an electrolyte accommodating space 2 is formed between a pair of positive electrode plates 1 and 1, and a negative electrode plate 4 disposed in the electrolyte accommodating space 2. And a negative electrode holder 5 attached to the end of the negative electrode plate 4. The posture of the air battery cell C1 is not particularly limited, but in this embodiment, the air battery cell C1 is used in the state of a bag with the negative electrode holder 5 on the upper side. For the positive electrode plate 1, the electrolytic solution, and the negative electrode plate 4, well-known materials constituting an air battery are applied.

  The positive electrode structure 3 includes two rectangular positive electrode plates 1, 1 and a frame 6 that holds the periphery of both positive electrode plates 1, 1. In the illustrated example, an electrolyte accommodating space 2 is provided at the upper end portion. Has a slit-like attachment opening 7 for inserting the negative electrode plate 4 into the main body. A seal member 8 is provided between the frame 6 and each positive electrode plate 1 at the upper end of the positive electrode structure 3. The seal member 8 electrically insulates between each positive electrode plate 1 and the negative electrode plate 4 and also seals between the positive electrode plate 1 and the negative electrode holder 5 so that the inner surface of each positive electrode plate 1 can be sealed. It is the shape which coat | covers also the upper end part.

  The electrolytic solution housing space 2 is filled with an electrolytic solution (not shown). The electrolyte solution may be in the form of a gel. The air battery cell C1 may be one in which the accommodation space 2 is filled with an electrolyte solution in advance, or a liquid injection type in which the accommodation space 2 is filled with an electrolyte solution at the time of activation. In addition, when the accommodating space 2 is filled with the electrolytic solution in advance, a means for blocking air such as a film that can be peeled off on the surface of each positive electrode plate 1 can be provided.

  The negative electrode plate 4 has a rectangular shape similar to that of the positive electrode plate 1, and has a thickness that forms a predetermined gap between each positive electrode plate 1 when arranged in the accommodation space 2. Further, the negative electrode plate 4 has groove-like engaging portions 4A and 4A that are engaged with a sandwiching member (described later) of the negative electrode holder 5 on both sides of the upper end portion in parallel with the upper side. A holding groove 6 </ b> A for fitting the lower end portion of the negative electrode plate 4 is formed in the inner bottom portion of the frame 6.

  The negative electrode holder 5 is rotatably connected to each other and is interposed between a pair of clamping members 9 and 9 that sandwich the end of the negative electrode plate, and the negative electrode plate 4 is sandwiched between the clamping members 9 and 9. The elastic body 10 is maintained. The negative electrode holder 5 has a length over the entire length of the attachment port 7 of the positive electrode structure 3, and a lower end portion has a thickness corresponding to the width of the attachment port 7.

  Both the clamping members 9 and 9 are plate-like members having bent intermediate portions, and the upper side of the intermediate portion is a gripping piece 9A and the lower side of the intermediate portion is a clamping piece 9B. The sandwiching members 9, 9 are symmetrically arranged with the bending direction facing outward, and the intermediate portions are rotatably connected to each other by the shaft portion 11, and an elastic body is provided between the gripping pieces 9A. 10 is inserted.

  Each clamping member 9 has a convex part 9C that can be engaged with and disengaged from the engaging part 4A of the negative electrode plate 4 at the lower end part of the clamping piece 9B. Further, the lower end portion of the frame-shaped handle 12 is connected to both end portions of the shaft portion 11 of the negative electrode holder 5. The elastic body 10 is not particularly limited as long as it can maintain the sandwiched state of the negative electrode plate 4, but is, for example, a torsion coil spring. The positive electrode plate 1 and the negative electrode plate 4 are provided with external terminals (not shown).

  As shown in FIG. 2 (A), the air battery cell C1 having the above-described configuration has the negative electrode holder 5 attached to the end portion of the negative electrode plate 4 and the electrolyte from the attachment port 7 of the positive electrode structure 3. The negative electrode plate 4 is inserted into the housing space 2. At this time, the negative electrode plate 4 can be easily handled by the negative electrode holder 5 and the handle 12.

  In the air battery cell C1, the lower end portion of the negative electrode plate 4 is fitted into the holding groove 6A of the frame 6 and the lower holding pieces 9B and 9B on the lower side of the negative electrode holding body 5 are fitted inside the attachment port 7. To do. Thereby, the air battery cell C1 is reliably positioned in a state where the negative electrode plate 4 forms a predetermined gap between the positive electrode plates 1 and 1. Further, when the negative electrode holder 5 is attached to the attachment port 7, a part of the seal member 8 is interposed between the positive electrodes 1, 1 and the sandwiching pieces 6 </ b> A so that the negative electrode holder 5 is attached. While maintaining the state, the mounting port 7 is closed watertight.

  Next, when removing the negative electrode plate 4, the air battery cell C <b> 1 simply pulls up the negative electrode holder 5 or the handle 12 and removes the negative electrode holder 4 from the attachment port 7 of the positive electrode structure 1. 4 can be easily taken out.

  Moreover, after taking out the negative electrode plate 4, as shown in FIG. 2 (B), the air battery cell C presses both grips 9A and 9A of the negative electrode holder 5 in a direction approaching each other, thereby sandwiching both of them. The members 9 and 9 are rotated to disengage the convex portions 9C and 9C from the engaging portions 4A and 4A of the negative electrode plate 4, and as shown in FIG. 2C, the negative electrode plate 4, the negative electrode holder 5 and the handle 12 are removed. And are completely separated. In order to attach the negative electrode holder 5 to the negative electrode plate 4, the steps of FIGS. 2A to 2C are performed in reverse.

  As described above, in the air battery cell C <b> 1, since the negative electrode holder 5 can be attached to and detached from the attachment port 7 of the positive electrode structure 3, the negative electrode plate 4 can be attached and detached by operating the negative electrode holder 5. The negative electrode plate 4 can be easily replaced. Further, since the air battery cell C1 can handle the negative electrode plate 4 by the negative electrode holder 5, for example, even when a strong alkaline electrolytic solution is used, the negative electrode plate 4 can be safely attached and detached without touching the electrolytic solution. Can be done. Furthermore, the negative electrode holder 5 can be used repeatedly.

  Furthermore, since the air battery cell C1 employs the negative electrode holder 5 including the pair of sandwiching members 9 and 9 and the elastic body 10, it is very easy to handle when replacing the negative electrode plate 4. A sufficient holding force of the negative electrode plate 4 can be obtained with a simple structure.

  Furthermore, since the air battery cell C1 is provided with the engaging portion 4A that engages with the holding member 9 of the negative electrode holder 5 on the negative electrode plate 4, the structure of the negative electrode holder 5 with respect to the negative electrode plate 4 is simple. Sufficient mounting strength can be obtained. For this reason, the air battery cell C1 stabilizes the work of attaching and removing the negative electrode plate 4 without the negative electrode plate 4 falling off from the negative electrode holder 5 when the negative electrode plate 4 is pulled out from the positive electrode structure 3. Can be done.

Second Embodiment
3 and 4 are diagrams for explaining embodiments of the air battery cell and the assembled battery according to the present invention. Note that the same components as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The illustrated air battery cell C2 has a basic configuration equivalent to that of the first embodiment, and the sandwiching members 9 and 9 of the negative electrode holder 5 are directed outward at the upper end of each gripping piece 9A. This is different from the first embodiment in that it has a horizontal protruding piece 9D.

  The assembled battery A shown in FIG. 3 includes a housing 21 that accommodates a plurality (three in the illustrated example) of air battery cells C2 arranged at predetermined intervals. The illustrated casing 21 has an opening 21A having an area corresponding to the arrangement region of the air battery cells C2 on the negative electrode holder 5 side of each air battery cell C2, that is, on the upper side.

  The casing 21 has a recess 21C formed by a pair of projecting pieces 21B and 21B at a position corresponding to each air battery cell C2 on the inner bottom surface, and the lower end of the air battery cell C2 is fitted into the recess 21C. Then, the lower end portion is positioned.

 The assembled battery A includes the connecting member 22 between the negative electrode holders 5 of the adjacent air battery C2 and between the negative electrode holder 5 of the air battery C2 at the end of the array and the edge of the opening 21A. It has a mounted structure. In this embodiment, the connection member 22 is mounted between the horizontal protrusions 9D and 9D of the negative electrode holders 5 in the adjacent air cells C2. A connecting member 22 is also mounted between the horizontal protrusion 9D of the negative electrode holder 5 and the edge of the opening 21A in the air battery C2 at the end of the array.

  The connection member 22 is made of an elastic member such as synthetic rubber, and has engagement grooves 22A and 22A that engage with the negative electrode holder 5 or the edge of the opening 21A on both sides thereof, It has a wedge shape with the side as the tip.

  Thereby, the assembled battery A is in a state in which the opening 21A of the housing 21 is closed by the negative electrode holder 5 and the connection member 22 of each air battery cell C2, and in the interior thereof, the adjacent air battery cell C2 Between each other and between the air battery C <b> 2 at the end of the array and the inner wall of the housing 21, an air flow path F for each positive electrode plate 1 is formed. Although not shown, the casing 21 can be provided with an air introduction part and a discharge part.

  In the assembled battery A, by removing the connecting member 22, as described in the first embodiment, the negative electrode plate 4 of each air battery cell C2 can be attached and detached, and the negative electrode plate 4 can be replaced. Can be easily performed. Moreover, the assembled battery A is very easy to attach and remove the air battery cell C2, and can easily deal with the replacement of the air battery cell C2.

  Moreover, the assembled battery A can make the inside of the housing | casing 21 substantially sealed space by adoption of the connection member 22, Furthermore, between the adjacent air battery cells C2, and the air of an arrangement | sequence edge part. By providing the air flow path F between the battery C2 and the inner wall of the housing 21, air (oxygen) can be efficiently supplied to the positive electrode plate 1 of each air battery cell C2.

Furthermore, the assembled battery A employs a connection member 22 made of an elastic member, thereby providing a housing 21.
Can be further improved, and attachment and removal of the connection member 22 are facilitated.

  Furthermore, the assembled battery A can further stabilize the mounting state of the connection member 22 by employing the connection member 22 having the engagement groove 22A that engages with the edge of the negative electrode holder 5 or the opening 21A. This can contribute to further improvement in the sealing performance of the casing 21.

  Furthermore, the assembled battery A employs a connection member 22 having a wedge shape with the inside of the housing as a tip, so that the negative electrode holders 5 can be connected to each other or between the negative electrode holders 5 and the edge of the opening 21A. It is possible to improve the fit between the two and contribute to the simplification of the assembly work.

  The specific configuration of the air battery cell and the assembled battery according to the present invention is not limited to the above-described embodiments, and details of the configuration can be appropriately changed without departing from the gist of the present invention. The shape, size, number and material of each constituent member, the number of air battery cells constituting the assembled battery, and the like can be variously selected.

A assembled battery C1, C2 air battery cell F air flow path 1 positive electrode plate 2 accommodation space 3 positive electrode structure 4 negative electrode plate 4A engaging part 5 negative electrode holding body 7 attachment port 9 clamping member 10 elastic body 21 housing 21A opening part 22 Connecting member 22A engaging groove

Claims (8)

A positive electrode structure in which an electrolyte storage space is formed between a pair of positive electrode plates;
A negative electrode plate disposed in the electrolyte accommodating space;
And a negative electrode holding member to be attached to an end portion of the negative electrode plate,
The positive electrode structure has a mounting opening for insertion of the negative electrode plate in the housing space of the electrolyte,
The anode holder includes a pair of clamping members for clamping the end portion of the negative electrode plate are pivotally connected to each other, and an elastic member for maintaining the holding state of interposing the negative electrode plate between both of the two sandwiching members together provided, Ri detachable der respect to the mounting port of the cathode structure,
The both clamping members are connected to each other in a rotatable manner, and one side of the intermediate part is used as a gripping piece, and the other side of the intermediate part is used as a holding piece for holding the end of the negative electrode plate,
The negative electrode holding body, wherein the match fit inside the mounting opening air battery cell characterized by Rukoto of the clamping piece the cathode structure of the two clamping members. The negative electrode plate, the air cell according to claim 1, characterized in that has an engaging portion for the clamping member engages the anode holder. 3. The air battery cell according to claim 1, wherein the positive electrode structure has a holding groove into which an end portion of the negative electrode plate is fitted at an inner bottom portion. An assembled battery comprising a plurality of the air battery cells according to any one of claims 1 to 3,
A housing that houses each air battery cell arranged at a predetermined interval,
The housing has an opening on the negative electrode holder side of each air battery cell,
A battery assembly comprising a connecting member mounted between the negative electrode holders of adjacent air cells and between the negative electrode holder of the air battery at the end of the array and the edge of the opening.   The assembled battery according to claim 4, wherein the connecting member is made of an elastic member.   6. The assembled battery according to claim 4, wherein the connecting member has an engaging groove that engages with the negative electrode holder or the edge of the opening.   The assembled battery according to any one of claims 4 to 6, wherein the connecting member has a wedge shape with the inside of the housing as a tip.   The group according to any one of claims 4 to 7, wherein an air flow path is formed between adjacent air battery cells and between the air battery at the arrangement end and the inner wall of the housing. battery.

Images