JP2007265762A - Immersion cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an immersion cell which has high operation reliability achieved by preventing unexpected destruction of an ampule due to a sideways shock, and improved fuel cell performance achieved by making electrolyte solution flow in power generating elements quickly and certainly. <P>SOLUTION: The immersion cell comprises: a laminate 5 constituted of a fastening plate 3, a spacer 4, and the power generating elements 2 sandwiched between the fastening plate 3 and the spacer 4, which has a cavity 6 in its central region; an ampule 7 in which the electrolyte solution 8 is encapsulated; and a cell case 1 in which the laminate 5 and the ampule 7 disposed in the cavity 6 of the laminate 5 are contained. Synthetic resins 14 and 15 are formed on tapered surfaces 14a and 15a at least with inner peripheral surfaces facing the cavity 6 and extending towards inner diameters the power generating elements 2, and disposed on inner peripheral surfaces of the fastening plate 3 and the spacer 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid injection type battery, and more particularly, to a liquid injection type battery that is mounted on a flying object and functions as a power source by operating at the time of flight.

  In order to function as a power source when the flying object flies, the ampule made of glass containing the electrolyte is destroyed by the acceleration acting when the flying object is launched, and at the same time, the ampoule is destroyed by the centrifugal force received by the rotating movement of the flying object. There is known a liquid injection type battery in which the electrolyte flowing out from the battery flows into the power generation element so that the battery function is exhibited (see, for example, Patent Document 1).

  The configuration of this injection type battery will be described with reference to FIG. A laminated ring-shaped power generation element 22 is housed in the battery case 21, and a glass ampoule 24 in which an electrolytic solution 23 is sealed in a central cavity of the power generation element 22 is positioned and positioned by a positioning spacer 25. It is supported by an ampoule support plate 26 made of a ring-shaped spring plate. The ampoule support plate 26 is placed on a protrusion 27 a protruding from the inner periphery of a cup-shaped receiver 27, and an ampoule breaking protrusion 27 b is protruded from the bottom surface of the receiver 27. Reference numeral 28 denotes an output terminal connected to the power generation element 22, and 29 denotes a spacer interposed between the positioning spacer 25 on the power generation element 22 and the upper wall of the battery case 21. Reference numeral 30 denotes a synthetic resin reverse impact absorber interposed between the upper surface of the ampoule 24 and the spacer 29 or the upper wall of the battery case 21.

  In the liquid injection type battery having the above configuration, when an upward acceleration is applied to the battery, the ampoule support plate 26 bends and disengages from the projection 27a, the ampule 24 moves downward and collides with the ampule breaking projection 27b, and the ampule 24 is destroyed, the internal electrolyte solution 23 flows out, and the electrolyte solution flows into the surrounding power generation element 22 by the centrifugal force caused by the rotation of the battery, so that the battery function is exhibited. On the other hand, when the reverse acceleration is applied to the battery, if there is no reverse shock absorber 30, the ampule 24 hits the spacer 29, and the ampule support plate 26 is operated by the repulsive force as described above so that the ampule 24 is Although there is a risk of accidental destruction, by providing the reverse impact absorber 30, the impact is absorbed so that the ampoule 24 is not unexpectedly destroyed.

  In addition, another liquid injection type battery is known in which an electrolyte is efficiently flown into a power generation element when an ampoule is broken (see, for example, Patent Document 2).

  The configuration of this injection type battery will be described with reference to FIG. The battery case 31 accommodates a laminated body 35 in which a laminated ring-shaped power generating element 32 is sandwiched between a ring-shaped metal holding plate 33 and a polyethylene spacer 34, and this laminated body. An ampoule 37 in which an electrolytic solution 38 is sealed is disposed in a hollow portion 36 at the center of 35. 39a and 39b are closing plates disposed above and below the laminated body 35 so as to close the upper and lower openings of the cavity 36, 40 is a lid plate for closing the upper surface opening of the battery case 31, and 41a and 41b are lead wires to the power generating element 32. The output terminals 43 connected via 42 a and 42 b are filled resin filled in the gaps between the outer periphery and upper surface of the laminate 35 and the battery case 31 and the cover plate 40.

Also in the liquid injection type battery having the above configuration, the battery function is exhibited in the same manner as described above by rotating the battery while applying an upward acceleration, and the inner peripheral surface facing the cavity 36 of the spacer 34 is By forming the tapered surface whose diameter increases toward the power generation element 32, the electrolyte 38 that has flowed out of the ampule 37 due to the breakage of the ampoule 37 flows along the taper surface and quickly and reliably flows into the power generation element 32. The effect that the battery performance can be improved is obtained.
Japanese Patent Laid-Open No. 10-302811 JP 2003-68311 A

  However, in the battery shown in FIG. 2, since the reverse shock absorber 30 is disposed, the ampoule 24 can be prevented from being unexpectedly broken when an acceleration in the reverse direction is applied, as shown in FIG. In the battery, the taper is formed on the inner periphery of the spacer 34, so that the effect that the electrolyte 38 quickly and surely flows into the power generation element 32 and the battery performance is improved is exhibited. However, a large acceleration is caused in the lateral direction. 2, the ampule 24 in the battery shown in FIG. 2 receives an impact from the positioning spacer 25 and breaks unexpectedly, and even in the battery shown in FIG. 3, the ampule 37 receives an impact from the holding plate 33 and the power generation element 32. There is a problem that the battery is unexpectedly destroyed and the reliability of the battery operation is lowered.

  In view of the above-mentioned conventional problems, the present invention can prevent unintentional destruction of the ampoule due to impact from the side, has high operation reliability, and improves the battery performance by promptly and surely flowing the electrolyte into the power generation element. It is an object of the present invention to provide an injectable battery.

  A liquid injection type battery of the present invention comprises a laminated body in which a power generation element is sandwiched between a holding plate and a spacer and a hollow portion is provided in the central part, an ampoule in which an electrolytic solution is sealed, a laminated body, and the laminate In a liquid injection type battery provided with a battery case containing an ampoule disposed in a hollow portion, a tapered surface on the inner peripheral portion of the holding plate and the spacer, at least the inner peripheral surface facing the hollow portion expands toward the power generation element The synthetic resin molded body formed in is arranged.

  According to this configuration, even if a large acceleration is applied to the battery from the lateral direction, the ampoule is in contact with the cushioned synthetic resin molding, so there is no risk of the ampoule receiving a large impact and unexpectedly breaking. High operating reliability can be secured, and the electrolyte that has flowed out when the ampoule is broken during operation is along the tapered surface formed on the inner peripheral surface of the synthetic resin molding by the action of centrifugal force generated by the rotation of the battery. The battery performance can be improved because it quickly and surely flows into the power generation element.

  Further, by making the holding plate and the spacers made of metal, it is possible to sufficiently ensure the strength and rigidity when the battery receives an impact from the outside.

  Further, when the synthetic resin molded body is a silicon resin molded body, the cushioning performance is excellent and the durability is high, so that the required cushioning property can be ensured for a long period of time, and a highly reliable liquid injection battery can be obtained.

  In addition, by setting the taper angle of the taper surface on the presser plate side to be larger than the taper angle of the taper surface on the spacer side, it is effective for the electrolyte that has moved more to the presser plate side due to the acceleration applied during battery operation. The electrolytic solution can be quickly and surely flowed into the power generation element by applying a centrifugal force, and high battery performance can be ensured even if a tapered surface is formed on the holding plate side.

  The taper angle Y on the holding plate side is preferably 2 to 30 °, and the taper angle X on the spacer side is preferably 0.5 to 10 °. If the angle range is less than the lower limit, the inflow of the electrolyte into the power generation element cannot be ensured. Conversely, if the upper limit is exceeded, the gap between the power generation element and the ampoule increases, and the volume of the ampoule is accordingly reduced. There is a need for it, and there is a risk of insufficient electrolyte and deterioration of discharge characteristics.

  According to the injection type battery of the present invention, even if a large acceleration acts on the battery from the lateral direction, the ampoule has a large impact because the synthetic resin molding is disposed on the inner periphery of the holding plate and the spacer. Therefore, it is possible to ensure high operational reliability without the risk of accidental destruction, and the electrolyte that has flowed out due to the ampoule being destroyed during operation is not contained in the synthetic resin molded body due to the centrifugal force generated by the rotation of the battery. The battery performance can be improved because it quickly and reliably flows into the power generation element along the tapered surface formed on the peripheral surface.

  Hereinafter, an embodiment of the injection type battery of the present invention will be described with reference to FIG.

  In FIG. 1, reference numeral 1 denotes a battery case, which is constructed by sandwiching a laminated ring-shaped power generation element 2 between ring-shaped pressing plates 3 and spacers 4 and having a hollow portion 6 in the center. The stacked body 5 is accommodated. The power generation element 2 is configured by laminating a plurality of single cells including a negative electrode plate using lead powder as an active material, a separator made of cellulose, and a positive electrode plate using lead dioxide as an active material. A glass ampoule 7 in which an electrolytic solution 8 made of a perchloric acid aqueous solution is sealed is disposed in the cavity 6 of the laminate 5. 9 is a closing plate disposed on the laminate 5 so as to close the upper opening of the cavity 6, 10 is a lid plate for closing the upper surface opening of the battery case 1, and 11 is an outer periphery and an upper surface of the laminate 5. It is a filling resin filled in a gap between the battery case 1 and the cover plate 10. Reference numerals 12a and 12b denote output terminals connected to the power generation element 2 via lead wires 13a and 13b.

  The holding plate 3 and the spacer 4 are made of a metal such as stainless steel, and cylindrical synthetic resin molded bodies 14 and 15 are respectively fitted and arranged on the inner peripheral portion facing the cavity 6. . The synthetic resin molded bodies 14 and 15 are formed on tapered surfaces 14 a and 15 a having at least inner peripheral surfaces whose diameters increase toward the power generation element 2, and there is a gap between the outer periphery of the ampoule 7 and the power generation element 2. The lower end of the synthetic resin molded body 14 that is formed and is fitted to the inner periphery of the pressing plate 3 is fitted to the outer periphery of the lower end of the ampoule 7. Further, a reverse impact absorber 16 made of synthetic resin is interposed between the upper surface of the ampoule 7 and the closing plate 9.

  The taper angle of the tapered surface 15a of the spacer-side synthetic resin molded body 15 with respect to the inner periphery of the power generating element 2 is X, and the taper angle of the tapered surface 14a of the synthetic resin molded body 14 of the holding plate side with respect to the inner periphery of the power generating element 2 is Y. Y is set larger than X. Specifically, the taper angle X is preferably 0.5 to 10 °, and the taper angle Y is preferably 2 to 30 °. Moreover, as a material of the synthetic resin moldings 14 and 15, various resins such as silicon resin, polyethylene, and polypropylene can be used, but silicon resin is preferable because of excellent buffer performance. Further, the hardness (penetration) (JIS K2207) of the synthetic resin moldings 14 and 15 is preferably 50 to 150, and the thickness dimension may be at least about 1 mm.

  In the liquid injection type battery having the above configuration, when upward acceleration is applied to the battery, a large impact acts on the ampoule 7, the ampoule 7 is destroyed, and the internal electrolyte 8 flows out. The electrolyte 8 that has flowed out flows almost instantaneously and reliably toward the power generation element 2 along the tapered surfaces 14a and 15a of the synthetic resin molded bodies 14 and 15 by the centrifugal force generated by the rotation of the battery. Since the battery function of the power generation element 2 is exhibited by flowing into the battery 2, the battery performance can be improved.

  On the other hand, when acceleration in the reverse direction is applied to the battery, the impact applied to the ampoule 7 is absorbed by the reverse impact absorber 16 having cushioning properties, so that the ampoule 7 is not abruptly destroyed. In addition, even when a large acceleration is applied to the battery from the lateral direction, the ampoule 7 is in contact with the synthetic resin molded bodies 14 and 15 having cushioning properties. There is no. Thus, when loading a projectile equipped with this liquid injection type battery into the launching device, even if large accelerations in various directions other than upwards are applied, there is no risk of the ampoule 7 being accidentally destroyed, so that the operation is high. Reliability can be secured.

  Further, in this embodiment, since the pressing plate 3 and the spacer 4 are made of metal such as stainless steel, it is possible to sufficiently ensure the strength and rigidity when the battery is subjected to an impact from the outside. Further, when the synthetic resin moldings 14 and 15 are made of silicon resin, the durability is high, so that required cushioning properties can be ensured over a long period of time, and a highly reliable liquid injection battery can be obtained.

  Further, since the taper angle of the taper surface 14a on the pressing plate 3 side is set to be larger than the taper angle of the taper surface 15a on the spacer 4 side, the electrolysis that has moved more to the pressing plate 3 side due to the acceleration applied during the operation of the battery. In order to effectively cause the centrifugal force to act on the liquid 8 so that the electrolytic solution 8 can flow into the power generation element 2 quickly and reliably, and to prevent the ampoule 7 from being accidentally broken, the presser plate 3 is used as described above. Even if the tapered surface 15a is formed on the side, high battery performance can be ensured.

  Moreover, since the taper angle Y on the holding plate 3 side is set to 2 to 30 ° and the taper angle X on the spacer 4 side is set to 0.5 to 10 °, the inflow property of the electrolytic solution 8 to the power generation element 2 can be secured, The gap between the power generation element 2 and the ampoule 7 does not become excessive, and the volume of the ampoule 7 can be secured, so that the shortage of the electrolyte 8 and the deterioration of the discharge characteristics can be suppressed. That is, if the angle range is less than the lower limit, the inflow of the electrolyte into the power generation element 2 cannot be ensured. Conversely, if the upper limit is exceeded, the gap between the power generation element 2 and the ampoule 7 increases, and the ampoule accordingly. Therefore, it is necessary to reduce the volume of the battery 7, and there is a risk that the electrolyte may be insufficient or the discharge characteristics may be deteriorated.

  In the above description of the embodiment, the example in which the synthetic resin molded bodies 14 and 15 are formed in a truncated conical cylinder having substantially the same thickness is shown. However, the inner peripheral surfaces are tapered surfaces 14a and 15a, and the outer peripheral surfaces are formed. May be configured such that the inner peripheral surfaces of the pressing plate 3 and the spacer 4 are cylindrical surfaces using synthetic resin moldings 14 and 15 having cylindrical surfaces.

  The present invention can prevent the ampoule from being subjected to a large impact by the synthetic resin molding even if a large acceleration is applied to the battery from the lateral direction, and can prevent the ampoule from being broken unexpectedly, and can ensure high operation reliability. The electrolyte that flows out when the ampule is broken flows into the power generation element quickly and reliably along the tapered surface formed on the inner peripheral surface of the synthetic resin molding by the action of the centrifugal force generated by the rotation of the battery. Therefore, it is useful for a liquid injection type battery that is mounted on a flying object and supplies power.

The longitudinal cross-sectional view of one Embodiment of the injection type battery of this invention Longitudinal sectional view of conventional injection type battery Vertical sectional view of another conventional injection type battery

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery case 2 Electric power generation element 3 Holding plate 4 Spacer 5 Laminated body 6 Cavity part 7 Ampoule 8 Electrolyte 14 Synthetic resin molding 14a taper surface 15 Synthetic resin molding 15a spacer side 15a taper surface

Claims (4)

  The power generation element is sandwiched between a holding plate and a spacer, and a laminated body in which a hollow portion is provided in the center portion, an ampoule in which an electrolytic solution is enclosed, and the ampule placed in the hollow portion and the laminated body are accommodated. In a liquid injection type battery provided with a battery case, a synthetic resin molded body having an inner peripheral surface facing at least a hollow portion and a tapered surface whose diameter expands toward a power generating element is formed on an inner peripheral portion of a holding plate and a spacer. An injection type battery characterized by being arranged.   The injection type battery according to claim 1, wherein the pressing plate and the spacer are made of metal.   The injection type battery according to claim 1, wherein the synthetic resin molded body is a silicon resin molded body. 2. The injection type battery according to claim 1, wherein the taper angle of the taper surface on the pressing plate side is larger than the taper angle of the taper surface on the spacer side.

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