JPS5910692Y2 - battery - Google Patents

Description

【考案の詳細な説明】 本考案はリチウム、アルミニウム等の軽金属を負極活物
質として用いる扁平型電池に関するものであり、その目
的とするところは電池内部短絡を防止すると共に耐漏液
性の向上を計ることにある。[Detailed description of the invention] This invention relates to a flat battery that uses light metals such as lithium and aluminum as negative electrode active materials, and its purpose is to prevent internal short circuits of the battery and improve leakage resistance. There is a particular thing.

以下本考案の一実施例を図面に基づき説明すると、第１
図及び第２図において、１は負極端子を兼ねる封口蓋で
あってその周縁部２には絶縁パッキング３がインサート
威型により配設されている。Below, one embodiment of the present invention will be explained based on the drawings.
In the drawings and FIG. 2, reference numeral 1 denotes a sealing lid which also serves as a negative electrode terminal, and an insulating packing 3 is disposed on the peripheral edge 2 of the lid by an insert type.

４は正極端子を兼ねる電池容器であって、その内底面に
は陽極集電板５がスポット溶接等により固着されており
、且つこの集電板上に二酸化マンガンを活物質とする陽
極板６、非水電解液を含浸せるセパレータ７が載置され
ている。Reference numeral 4 denotes a battery container which also serves as a positive electrode terminal, and an anode current collector plate 5 is fixed to the inner bottom surface of the container by spot welding or the like. A separator 7 impregnated with a non-aqueous electrolyte is placed.

８はリチウム、アルミニウム等の軽金属よりなる負極板
であって前記封口蓋１の内底面に圧着されている。Reference numeral 8 denotes a negative electrode plate made of a light metal such as lithium or aluminum, which is press-bonded to the inner bottom surface of the sealing lid 1.

而して、前記絶縁パッキング３の内側面は皿状封口蓋１
の内底面の外径から内方へ膨出していると共に絶縁パッ
キング３の内側部上部は一部切欠かれており、それによ
って封口蓋１の内底面と絶縁パッキング３の内側部上面
とにより環状凹所９が形或されている。Thus, the inner surface of the insulating packing 3 is covered with a dish-shaped sealing lid 1.
bulges inward from the outer diameter of the inner bottom surface of the insulating packing 3, and the upper part of the inner side of the insulating packing 3 is partially cut out. Place 9 is shaped.

この凹所９は絶縁パッキング３のインサート或型時に一
体的に形威される。This recess 9 is formed integrally with the insert of the insulating packing 3.

そして第２図Ｂに示す如き負極板８を封口蓋１に圧着す
る際、負極板８の周縁延出部８１が前記凹所９に嵌入す
るものである。When the negative electrode plate 8 as shown in FIG. 2B is pressed onto the sealing lid 1, the peripheral edge extension 81 of the negative electrode plate 8 fits into the recess 9.

さて、従来のこの種電池構造においては第３図に示すよ
うに負極板８′を封口蓋１′に圧着した際、負極板８′
の周縁延出部８１′が絶縁パッキング３′の内側面を沿
って対極方向に向って突出するため、セパレータを突破
り対極に接して内部短絡を引起す懸念があった。Now, in the conventional battery structure of this type, when the negative electrode plate 8' is crimped onto the sealing lid 1', as shown in FIG.
Since the peripheral edge extension 81' protrudes along the inner surface of the insulating packing 3' toward the opposite electrode, there is a fear that it may break through the separator and come into contact with the opposite electrode, causing an internal short circuit.

又、このような周縁延出部８１′が対極に向って突出す
るのを可及的に阻止するためには負極板の圧着力をあま
り大きくすることができず、そのため封口蓋１′と負極
板８′との間に負極集電板１０を介在せしめて集電効率
を高める構造としていた。Furthermore, in order to prevent the peripheral edge extension 81' from protruding toward the counter electrode as much as possible, it is not possible to increase the pressure of the negative electrode plate so much that the sealing lid 1' and the negative electrode A negative electrode current collector plate 10 is interposed between the negative electrode current collector plate 10 and the negative electrode current collector plate 10 to enhance current collection efficiency.

これに対して本考案電池構造によれば、絶縁パッキング
３の内側部上部を一部切欠いて封口蓋１の内底面と絶縁
パッキング３の内側部上面とにより形或される環状凹所
９を設けたので、負極板８の周縁延出部８１がこの凹所
９に嵌入し内部短絡を引起すと云った不都合は皆無とな
る。On the other hand, according to the battery structure of the present invention, a part of the upper part of the inner side of the insulating packing 3 is cut out to provide an annular recess 9 formed by the inner bottom surface of the sealing lid 1 and the inner upper surface of the insulating packing 3. Therefore, there is no problem that the peripheral edge extension 81 of the negative electrode plate 8 would fit into the recess 9 and cause an internal short circuit.

又、上述したように負極板８の周縁延出部８１が対極に
向って突出することがないので負極板８の圧着力を大き
くすることができるため、負極集電板を削除しても封口
蓋１と負極板８との電気接続状態を良好に維持しうるも
のであり、部品点数の低減化が計れる。Furthermore, as described above, since the peripheral edge extension 81 of the negative electrode plate 8 does not protrude toward the counter electrode, the crimp force of the negative electrode plate 8 can be increased. The electrical connection state between the lid 1 and the negative electrode plate 8 can be maintained well, and the number of parts can be reduced.

更に凹所９に嵌入された負極板８の周縁延出部８１は電
池反応に関与せず残存するため、この凹所９を形或する
絶縁パッキング３と封口蓋１との接合部を介しての電解
液の漏出を阻止できるものであり耐漏液性の向上が計れ
る。Furthermore, since the peripheral edge extension 81 of the negative electrode plate 8 fitted into the recess 9 remains without taking part in the battery reaction, it is It is possible to prevent the leakage of the electrolyte solution and improve the leakage resistance.

上述した如く本考案電池構造は種々の実用的効果を奏す
るものである。As described above, the battery structure of the present invention has various practical effects.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図は本考案に係り、第１図は電池の縦断
面図、第２図Ａは負極板を圧着する前の要部断面図、第
２図Ｂは負極板を圧着した状態の要部断面図、第３図は
従来電池に係り、第３図Ａは負極板を圧着する前の要部
断面図、第３図Ｂは負極板を圧着した状態の要部断面図
を夫々示す。 １・・・封口蓋、３・・・絶縁パッキング、４・・・電
池容器、６・・・正極板、８・・・軽金属よりなる負極
板、８１・・・負極板の周縁延出部、９・・・絶縁パッ
キングの内側部上面と封口蓋の内底面とにより形或され
る環状四所。Figures 1 and 2 relate to the present invention; Figure 1 is a longitudinal cross-sectional view of the battery, Figure 2A is a cross-sectional view of the main part before the negative electrode plate is crimped, and Figure 2B is the negative electrode plate after being crimped. Fig. 3 is a sectional view of the main part in the state of the conventional battery, Fig. 3A is a sectional view of the main part before the negative electrode plate is crimped, and Fig. 3B is a sectional view of the main part with the negative electrode plate crimped. Show each. DESCRIPTION OF SYMBOLS 1... Sealing lid, 3... Insulating packing, 4... Battery container, 6... Positive electrode plate, 8... Negative electrode plate made of light metal, 81... Peripheral extension of negative electrode plate, 9...Four annular portions formed by the inner upper surface of the insulating packing and the inner bottom surface of the sealing lid.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 負極端子を兼ねる皿状封口蓋の周縁に配設した環状絶縁
パッキングの内側面が前記封口蓋内底面の外径から内方
へ膨出しているものであって、前記絶縁パッキングの内
側部上部を欠落せしめて封口蓋の内底面と絶縁パッキン
グの内側部上面とにより環状凹所を形設し、前記封口蓋
の内底面に圧着される軟性金属よりなる負極板の周縁延
出部を前記環状凹所に嵌入せしめてなる電池。The inner surface of the annular insulating packing disposed around the periphery of the dish-shaped sealing lid, which also serves as a negative electrode terminal, bulges inward from the outer diameter of the inner bottom surface of the sealing lid, and the inner surface of the insulating packing has an upper inner surface. An annular recess is formed by the inner bottom surface of the sealing lid and the inner upper surface of the insulating packing, and a peripheral extension of a negative electrode plate made of a soft metal that is crimped onto the inner bottom surface of the sealing lid is inserted into the annular recess. A battery that is inserted into a place.