JP4083363B2 - Injection battery - Google Patents

Description

【００１２】
表から明らかなように、比較例の電池ｂは、逆方向の衝撃力58,800ｍ／Ｓ²（6000Ｇ）を印加したとき破壊率は３０％に達し、78,400ｍ／Ｓ²（8000Ｇ）を印加したとき破壊率は９０％である。これに対して、本発明による電池ａは、逆方向の衝撃力58,800ｍ／Ｓ²（6000Ｇ）を印加したとき破壊率は０であり、78,400ｍ／Ｓ²（8000Ｇ）を印加しても破壊率は３０％である。因みに飛翔体発射時の衝撃力は11,760〜58,800ｍ／Ｓ²（1,200〜6,000Ｇ）である。
【００１３】
【発明の効果】
以上のように本発明によれば、本来の性能を損なうことなく、逆方向の衝撃力でアンプルが破壊しない注液式電池を提供することができる。
【図面の簡単な説明】
【図１】本発明の一実施例における注液式電池の縦断面図である。
【符号の説明】
１ 外装ケース
１ａ 筒部
１ｂ 上蓋
２ 下蓋
３ 内ケース
４ ソケット
５ 発電要素
６ 余剰液収容部
７ 空洞部
８ 電解液
９ アンプル
１０ 座金
１１ アンプル受具
１１ａ 突起
１２ 頂部閉塞部
１３ 空隙部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid injection type battery that generates power by breaking a glass ampoule in which an electrolytic solution is encapsulated by an external impact, and particularly relates to improvement of a portion that holds the ampoule.
[0002]
[Prior art]
The injection type battery that generates electricity by breaking the glass ampoule encapsulating the electrolyte with external impact has good storage characteristics, and if the ampoule is destroyed, it immediately generates power and exhibits the desired performance. It is used as a power source for control devices mounted on flying objects.
The liquid injection type battery mounted on the flying object is made so that the glass ampoule is destroyed by the impact force when the flying object is launched, that is, the impact force applied in the direction opposite to the launching direction. However, in recent years, an automatic loading method for flying objects has been introduced, and when a flying object is loaded on a launch pad, an impact force in the direction opposite to the firing impact is applied to the battery. Conventionally, since the flying object is manually loaded on the launch pad, it is not assumed that an impact force in the direction opposite to the launch impact is applied. For this reason, in the conventional battery, the ampoule is destroyed by the impact force in the direction opposite to the firing impact applied during automatic loading.
Therefore, it is conceivable to increase the strength of the ampule. However, when the strength of the ampule is increased, there is a disadvantage that the ampule is not broken during normal operation.
[0003]
[Problems to be solved by the invention]
In view of the above, the present invention does not significantly change the conventional configuration, buffers the impact force in the reverse direction when the flying object is automatically loaded, does not break the ampule, and operates normally during normal operation. An object is to provide a liquid battery.
[0004]
[Means for Solving the Problems]
An injection type battery according to the present invention includes an inner case made of a cylindrical resin molded body that covers an electric power generation element and has an electrolyte injection port communicating with a central cavity, and a top closing portion of the inner case in the central cavity A glass ampule in which an electrolyte solution whose bottom is supported by a ring washer is sealed, an ampule holder having an ampule breaking projection on the inner bottom portion facing the bottom portion of the ampule, and the inner case A liquid-filled battery comprising a metal outer case accommodated and generating power by destroying the ampoule by an impact force generated by a propulsive force toward the head of the ampoule, wherein the head of the glass ampoule is protrudes from the body of the glass ampoule, on top closed portion of the case for receiving the head and the projecting, the impact absorbing portion configured in thin portion having a gap portion between the outer case And wherein the digit.
The thickness of the thin part is preferably 1.0 to 2.5 mm.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes an inner case made of a cylindrical resin molded body that covers an electric power generation element and has an electrolyte inlet that communicates with a central cavity, and a head is applied to the top closed portion of the inner case in the central cavity. A glass ampule in contact with and enclosing an electrolyte solution supported by a ring washer, an ampule holder provided with an ampule breaking projection on an inner bottom portion facing the bottom portion of the ampule, and a metal exterior housing the inner case In a liquid injection type battery having a case and generating power by destroying the ampoule by an impact force generated by a propulsive force toward the head of the ampoule, the inner case which was intended to protect the ampoule was improved. An impact absorbing portion constituted by a thin portion having a gap between the outer case and the outer case is provided at the top closed portion of the inner case that receives the head from which the ampule protrudes .
According to the present invention, the impact force in the reverse direction is buffered by the above-mentioned impact absorbing portion only by changing a part of the inner case made of the conventional resin molded body, and the ampoule is prevented from being broken, and the normal impact force is also provided. When this is received, a liquid injection type battery that operates in the same manner as before can be obtained.
[0006]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a metal outer case in which a cylindrical portion 1a and an upper lid 1b are joined by integral pressing, and a resin inner case 3 is accommodated therein. The bottom of the outer case 1 is closed by a resin lower lid 2.
The socket 4 provided in the upper part of the case 1 is provided with terminal portions that are connected to a control device for battery-powered equipment, including positive and negative terminals.
The inner case 3 is formed by covering a ring-shaped power generation element 5 from the inside and outside and molding it so as to have a hollow portion 7 in the center. The power generation element 5 is formed by stacking, for example, single cells composed of a negative electrode plate using lead powder as an active material, a separator made of cellulose, and a positive electrode plate using lead dioxide powder as an active material so as to be connected in series. An electrolyte is injected into the inside of the inner case 3 containing the power generation element 5 from a slit (not shown) communicating with the cavity 7. Then, the electrolytic solution is instantaneously supplied to every corner of the power generation element by the centrifugal force generated by the rotation of the flying body on which the battery is mounted. The inner case 3 has a surplus liquid container 6 made of a dummy cell that absorbs an excessively supplied electrolyte and prevents a liquid junction.
[0007]
A glass ampoule 9 containing an electrolytic solution 8 made of a perchloric acid aqueous solution is set in the central cavity 7 of the inner case 3. That is, the ampoule 9 has a head protruding from the main body, the head is in contact with the top closing part 12 of the cavity 7, and the bottom is supported by the ring-shaped washer 10. The washer 10 is set on the upper part of a cup-shaped ampoule receiver 11 which is pushed into the cavity 7 and fixed. The ampoule receiver 11 has a protrusion 11a on its inner bottom.
This battery is mounted so that its head is in the traveling direction of the flying object, and when the flying object is launched, acceleration is applied in the traveling direction. As a result, the ampoule 9 deflects the washer 10 into the receiver 11. It falls and collides with the protrusion 11a to destroy it. The electrolytic solution released from the ampoule enters the inner case 3 through the slit communicating with the cavity 7 by the centrifugal force generated by the rotation of the flying body, and enables the battery to generate power.
[0008]
In the above configuration, when an impact force in the opposite direction to the above is applied to the battery, the ampoule collides with the top closing portion 12 of the inner case 3. Conventionally, the top closing portion 12 is thick and is in contact with the upper lid 1b. Therefore, when the impact force as described above is applied, the ampoule 9 is easily broken.
[0009]
In the present embodiment, the top closing portion 12 is configured to act as an impact absorbing portion as follows.
The top closing portion 12 of the hollow portion 7 in the inner case 3 is formed into a thin portion by forming a gap portion 13 between the upper lid 1 b of the case 1, thereby constituting an impact absorbing portion for the ampoule 9.
This thin part has an area that is slightly larger than the head of the ampoule in contact with this, and if the thickness is 1.0 to 2.5 mm, it has moderate elasticity and is effective as an impact absorbing part for the ampoule. work. The gap between the thin portion and the upper lid 1b is suitably 2.0 to 4.0 mm so that the thin portion does not collide with the upper lid 1b when the thin portion is bent upward due to an impact on the ampoule. In the conventional inner case, the top closing portion 12 is in direct contact with the upper lid 1b and has a thickness of about 5 mm. According to the present invention, the ampoule can be prevented from being broken when a reverse impact force is applied by only partially improving the top closing portion 12 of the inner case 3.
A method of attaching a shock absorbing material or the like to the head of the ampoule instead of the shock absorbing part for protecting the ampoule by the top closing part 12 can be considered. However, when such another member is added, when the ampoule is broken for battery activation, these members impede the supply of the electrolytic solution to the power generation unit. Therefore, it is not possible to employ another member.
[0010]
【Example】
Next, specific examples will be described.
In the configuration shown in the figure, the ampule 9 having a head diameter of about 5 mm and a weight of about 2.4 g was used. The inner case 3 was made of polyvinyl chloride, and the thin portion of the top closing portion 12 was a circle having a diameter of about 8 mm and had a thickness of 2.0 mm. The gap between the thin part and the upper lid 1b was 2.5 mm. The battery according to the present invention using the inner case is denoted by a, and the battery of the comparative example using the inner case without the gap 13 is denoted by b.
For these batteries, it was investigated whether or not the ampoule was destroyed by applying an impact force in the direction opposite to the launch impact when loaded on the flying object. The results are shown in Table 1. The number of samples was 50 each.
[0011]
[Table 1]

[0012]
As is clear from the table, the battery b of the comparative example had a fracture rate of 30% when a reverse impact force of 58,800 m / S ² (6000 G) was applied, and 78,400 m / S ² (8000 G) was applied. Sometimes the destruction rate is 90%. On the other hand, the battery a according to the present invention has a fracture rate of 0 when a reverse impact force of 58,800 m / S ² (6000 G) is applied, and breaks even when 78,400 m / S ² (8000 G) is applied. The rate is 30%. Incidentally, the impact force when launching a flying object is 11,760 to 58,800 m / S ² (1,200 to 6,000 G).
[0013]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a liquid injection type battery in which an ampoule is not broken by an impact force in a reverse direction without impairing the original performance.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an injection type battery in one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Exterior case 1a Cylinder part 1b Upper cover 2 Lower cover 3 Inner case 4 Socket 5 Power generation element 6 Excess liquid storage part 7 Cavity part 8 Electrolytic solution 9 Washer 11 Ampoule receiver 11a Protrusion 12 Top part obstruction | occlusion part 13 Cavity part

Claims (2)

An inner case made of a cylindrical resin molded body that covers the power generation element and has an electrolyte inlet that communicates with the central cavity, the head abutting on the top closed portion of the inner case in the central cavity, and the bottom A glass ampoule enclosing an electrolyte supported by a ring washer, an ampoule holder provided with an ampoule breaking projection on the inner bottom part facing the bottom part of the ampoule, and a metal outer case housing the inner case A liquid injection type battery that generates power by destroying the ampoule by an impact force generated by a propulsive force in the head direction of the ampoule, wherein the head of the glass ampoule protrudes from the main body of the glass ampoule, on top closed portion of the case inner receiving the head and the protruding, characterized in that a shock absorbing portion constituted by the thin portion having a gap portion between the outer case Liquid type battery.   The injection type battery according to claim 1, wherein the thin portion has a thickness of 1.0 to 2.5 mm.

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