JPS6031157Y2 - spiral battery - Google Patents

Description

【考案の詳細な説明】 本考案は渦巻式電池の改良に係り、電池製造時の作業性
がよく、かつ内部抵抗が小さい渦巻式電池を提供するこ
とを特徴とする。[Detailed Description of the Invention] The present invention relates to an improvement of a spiral battery, and is characterized by providing a spiral battery that is easy to work with during battery manufacturing and has low internal resistance.

渦巻式電池においては、たとえば第７図に示すように、
極板からのリードを、陰極側では集電体３の端部を陰極
集電棒８にスポット溶接し、陽極側では集電体６の端部
を延長させて内情９の側壁内面にスポット溶接するか、
あるいは溶接することなく内情９の側壁内面に接触させ
ることによって行なっている。In a spiral battery, for example, as shown in Figure 7,
For the lead from the electrode plate, on the cathode side, the end of the current collector 3 is spot welded to the cathode current collector rod 8, and on the anode side, the end of the current collector 6 is extended and spot welded to the inner surface of the side wall of the internal information 9. mosquito,
Alternatively, this may be done by contacting the inner surface of the side wall of the internal information 9 without welding.

しかしながら、カメラなどに内蔵される小型の電池では
、内情は直径がせいぜい１−程度の小さいものであり、
陽極側の集電体６の端部を内情９の側壁内面にスポット
溶接するのは困難であり、作業性がきわめて悪く、また
溶接することなく陽極側の集電体６の端部を内情９の側
壁に接触させた場合は、接触抵抗が大きくなり電池の内
部抵抗が増大して、とくに重負荷放電では放電性能の低
下がいちじるしくなる。However, the internal details of small batteries built into cameras and the like are small, with a diameter of at most 1 mm.
It is difficult to spot weld the end of the current collector 6 on the anode side to the inner surface of the side wall of the inside information 9, and the workability is extremely poor. If the battery is brought into contact with the side wall of the battery, the contact resistance increases and the internal resistance of the battery increases, resulting in a noticeable drop in discharge performance, especially during heavy load discharge.

本考案はそのような事情に鑑みてなされたものであり、
電池容器としての外缶１０の内側に配置される内情に、
渦巻状に巻回した電極板を収納する渦巻式電池において
、内情の側壁の下端部に切欠部を設け、該切欠部より集
電体の端部を引き出し、内情の側壁にそって折り返し、
内情と外缶との間で挟持することにより、集電体の端部
を内情の側壁内面に溶接する手間を不要にし、かつ接触
抵抗を低下させて、重負荷放電においても放電性能の良
好な渦巻式電池が得られるようにしたものである。This invention was made in view of such circumstances,
In the internal information arranged inside the outer can 10 as a battery container,
In a spiral battery that stores a spirally wound electrode plate, a notch is provided at the lower end of the side wall of the inside, the end of the current collector is pulled out from the notch, and folded back along the side wall of the inside,
By sandwiching the current collector between the inner case and the outer can, it is unnecessary to weld the end of the current collector to the inner surface of the side wall of the inner case, and the contact resistance is reduced, resulting in good discharge performance even under heavy load discharge. This allows a spiral type battery to be obtained.

つぎに本考案の実施例を図面に基づいて説明する。Next, embodiments of the present invention will be described based on the drawings.

第１図は本考案の一実施例を示す渦巻式有機電解質電池
の部分断面図、第２図はその第１図Ｘ−Ｘ線における断
面図、第３図は第２図のＹ−Ｙ線における要部断面図、
第４図は陽極側の斜視図、第５図は内情の斜視図である
。Fig. 1 is a partial cross-sectional view of a spiral organic electrolyte battery showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along line Y-Y in Fig. 2. A cross-sectional view of the main parts of
FIG. 4 is a perspective view of the anode side, and FIG. 5 is a perspective view of the internal details.

図面において、１は陰極剤としての長さ６０ｍｍ。In the drawing, 1 has a length of 60 mm as a cathode material.

幅８−１厚さ０．２ｍｍのリチウム板２の片面に溶接金
網よりなる集電体３を圧着してなる陰極板であり、４は
陽極合剤５を溶接金網よりなる集電体６に保持せしめて
形成した陽極板であり、この陽極板４はポリプロピレン
不織布などからなるセパレータフで包被され、前記陰極
板１と重ね合わせ陰極集電棒８を芯にしてその周囲に渦
巻状に巻回し、ステンレス製の内情９に収納されている
。A cathode plate is made by pressing a current collector 3 made of a welded wire mesh onto one side of a lithium plate 2 having a width 8-1 and a thickness of 0.2 mm, and 4 is a cathode plate made by pressing an anode mixture 5 onto a current collector 6 made of a welded wire mesh. The anode plate 4 is covered with a separator tuff made of polypropylene nonwoven fabric, etc., and is overlapped with the cathode plate 1 and wound spirally around the cathode current collector rod 8 as a core. , is housed in a stainless steel case 9.

そして陰極板１の内部側の端部では集電体３がステンレ
ス製の陰極集電棒８にスポット溶接され、陽極板４の外
部側の端部ては集電体６が陽極合剤５まり突き出ていて
、その先端部は内情９の側壁の下端部に設けた切欠部９
ａより引き出され、内情９の側壁の外面にそって折り返
され、内情９の側壁と外缶１０の側壁との間で挟持され
ている。At the inner end of the cathode plate 1, a current collector 3 is spot-welded to a stainless steel cathode current collector rod 8, and at the outer end of the anode plate 4, a current collector 6 protrudes from the anode mixture 5. The tip end is a notch 9 provided at the lower end of the side wall of the inside information 9.
a, is folded back along the outer surface of the side wall of the inner can 9, and is held between the side wall of the inner can 9 and the side wall of the outer can 10.

しかして陽極側の集電体６は、内情９の切欠部９ａより
引き出しやすいように、第４図に示すごとく、陽極合剤
５より突き出る側の端部を斜め下方に突き出た形状にし
ておくことが好ましい。As shown in FIG. 4, the current collector 6 on the anode side is shaped so that its end protruding from the anode mixture 5 is diagonally downward so that it can be easily pulled out from the notch 9a of the internal information 9. It is preferable.

内情９は、第５図に詳示されるように、上端に内向きの
鍔部を有する円筒状をしており、内情９の切欠部９ａは
内情９の側壁の下端部に設けられ、その幅および深さは
、集電体６の端部を引き出すのが困難にならない範囲内
で小さい方が好ましく、幅は集電体６端部の約１．２倍
、深さは集電体６の厚さの約１〜２倍程度が好ましい。As shown in detail in FIG. 5, the inside information 9 has a cylindrical shape with an inward flange at the upper end, and the notch 9a of the inside information 9 is provided at the lower end of the side wall of the inside information 9, and its width is It is preferable that the width and depth be as small as possible within a range that does not make it difficult to pull out the end of the current collector 6, and the width is about 1.2 times the end of the current collector 6, and the depth is It is preferably about 1 to 2 times the thickness.

このように切欠部９ａを集電体の端部の引き出しが無理
なく行なえる範囲内で、できるだけ小さくするのは、内
情９が本来、外缶１０の開口端部を内方に折り曲げてそ
の内周面を陰極端子板１１に嵌着させた環状バッキング
１２に圧接させて封口する際に、封口圧によって電極板
が崩壊するのを防止するためのものであり、切欠部９ａ
を大きくすると封口圧に耐える力が弱くなるからである
。The reason why the notch 9a is made as small as possible within the range that allows the end of the current collector to be pulled out without difficulty is that the internal information 9 was originally made by bending the open end of the outer can 10 inward and inserting it inside the can. This is to prevent the electrode plate from collapsing due to the sealing pressure when the peripheral surface is brought into pressure contact with the annular backing 12 fitted to the cathode terminal plate 11 for sealing.
This is because as the value increases, the ability to withstand sealing pressure becomes weaker.

内情９の外側にはニッケルーステンレスクラツド板より
なり、陽極缶ならびに電池容器としての役目をなす外缶
１０が配置され、この外缶１０と陰極板１および陰極集
電棒８との間は樹脂製の絶縁板１３によって絶縁され、
また陰極板１と内情９との間は樹脂製の絶縁リング１４
によって絶縁されている。An outer can 10 made of a nickel-stainless steel clad plate and serving as an anode can and a battery container is disposed on the outside of the interior 9, and a resin layer is placed between the outer can 10, the cathode plate 1, and the cathode current collector rod 8. Insulated by an insulating plate 13 made of
Also, between the cathode plate 1 and the internal information 9 is an insulating ring 14 made of resin.
insulated by.

陰極集電棒８の拡大頭部は、内情９の中央部に設けた穴
より突き出ていて、その上端突出部にはニッケルーステ
ンレスクラツド板よりなる陰極端子板１１がスポット溶
接され、この陰極端子板１１と外缶１０の開口端部との
間にはポリプロピレン製の環状バッキング１２が配設さ
れ、外缶１０の開口端部の内方への締め付けにより電池
内部が密閉構造にされている。The enlarged head of the cathode current collector rod 8 protrudes from a hole provided in the center of the internal information 9, and a cathode terminal plate 11 made of a nickel-stainless steel clad plate is spot-welded to the upper end protrusion. A polypropylene annular backing 12 is disposed between the plate 11 and the open end of the outer can 10, and the inside of the battery is sealed by tightening the open end of the outer can 10 inward.

そして、この電池には炭酸プロピレンと１，２−ジメト
キシエタンとの容量比が１：１の混合溶媒に過塩素酸リ
チウムを１．０モル／ｌの割合で溶解させてなる電解液
が注入され、陽極合剤５としては、二酸化マンガン１０
幅（重量部、以下同様）、りん状黒鉛Ｗ部およびポリテ
トラフルオロエチレン１部よりなるものが用いられ、集
電体３，６としての溶接金網には、線径０．１ｍｍのス
テンレス線を６０メツシユの網目に平織したものを真空
中１０００’Ｃに加熱し、ステンレス線交叉点を圧着し
て溶接することによって作製した溶接ステンレス網が用
いられている。Then, an electrolytic solution made by dissolving lithium perchlorate at a ratio of 1.0 mol/l in a mixed solvent of propylene carbonate and 1,2-dimethoxyethane with a volume ratio of 1:1 was injected into this battery. , as the anode mixture 5, manganese dioxide 10
Width (parts by weight, the same applies hereinafter), W parts of phosphorous graphite and 1 part of polytetrafluoroethylene are used, and the welded wire meshes as the current collectors 3 and 6 are made of stainless steel wire with a wire diameter of 0.1 mm. A welded stainless steel mesh fabricated by plain weaving a 60-mesh mesh is heated in a vacuum to 1000'C, and the intersection points of the stainless steel wires are crimped and welded.

つぎの第１表は、上記のような構成からなる本考案の電
池Ａと、他の構成よりなる電池ＢおよびＣの内部抵抗を
示すものである。Table 1 below shows the internal resistances of battery A of the present invention having the above-mentioned configuration and batteries B and C having other configurations.

なお電池Ｂは陽極側の集電体の外部側の端部を内情の側
壁の内面にスポット溶接した以外は電池Ａと同様につく
られたものであり、電池Ｃは陽極側の集電体の外部側の
端部を内情の側壁に溶接することなく接触されたほかは
電池Ａと同様につくられたものである。Battery B was made in the same way as Battery A, except that the outer end of the anode side current collector was spot welded to the inner surface of the internal side wall, and Battery C was made in the same way as Battery A. It was made in the same manner as Battery A, except that the outer end was connected to the inner side wall without welding.

なお、内部抵抗は各電池５嘲ずつについて測定した平均
値とそのバラツキで示されている。Note that the internal resistance is shown as the average value measured for five batteries of each battery and its variation.

第１表に示されるように、本考案の電池Ａは、集電体を
内情にスポット溶接した電池Ｂとほぼ同程度の内部抵抗
を有し、集電体を内情に接触させただけの電池Ｃに比べ
て内部抵抗、バラツキともに小さい。As shown in Table 1, battery A of the present invention has approximately the same internal resistance as battery B in which the current collector is spot welded to the inside, and a battery in which the current collector is only in contact with the inside. Both internal resistance and variation are smaller than C.

第６図は上記電池Ａ、ＢおよびＣについて２０℃、１に
Ωで連続放電させたときの放電特性を示す図である。FIG. 6 is a diagram showing the discharge characteristics of the batteries A, B, and C when they were continuously discharged at 20° C. and 1Ω.

第６図に示す結果より明らかなように、本考案の電池Ａ
は、低温重負荷放電での放電性能が電池Ｂとほぼ同等で
あり、電池Ｃに比べてすぐれている。As is clear from the results shown in FIG.
The discharge performance under low-temperature heavy load discharge is almost the same as that of battery B, and is superior to that of battery C.

なお実施例では外缶１０を陽極缶として用い、内情９よ
りその端部を引き出して内情９と外缶１０との間で挟持
する集電体６を陽極側の集電体として用いる場合を例に
あげて説明したが、電池系内の陰陽をすべて逆にして、
外缶を陰極缶とじて用い、内情９よりその端部を引き出
して内情９と外缶１０との間で挟持する集電体を陰極側
の集電体として用いることもできるものである。In the embodiment, an example is given in which the outer can 10 is used as an anode can, and the current collector 6 whose end is pulled out from the inner case 9 and held between the inner case 9 and the outer case 10 is used as the anode side current collector. As I explained above, by reversing all the yin and yang in the battery system,
It is also possible to use the outer can as a cathode can, pull out its end from the inner case 9, and use the current collector sandwiched between the inner case 9 and the outer case 10 as the current collector on the cathode side.

また集電体６として溶接金網を例にあげたが、それのみ
に限られるものではなく、通常の金網、エキスパンデッ
ドメタルなどの他のものも用いることができるし、内情
や陰極集電棒もステンレス製以外のものも用いることが
できる。In addition, although welded wire mesh has been given as an example as the current collector 6, it is not limited to this, and other materials such as ordinary wire mesh and expanded metal can also be used. Materials other than stainless steel can also be used.

また、実施例を有機電解質電池の場合について説明した
が、本考案はそれのみに限定されるものではなく、たと
えばアルカリ電池などの他の渦巻式電池にも適用される
ものである。Further, although the embodiments have been described in the case of an organic electrolyte battery, the present invention is not limited thereto, but can also be applied to other spiral type batteries such as alkaline batteries.

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

第１図は本考案の一実施例を示す渦巻式有機電解質電池
の部分断面図、第２図はその第１図Ｘ−Ｘ線における断
面図、第３図は第２図のＹ−Ｙ線における要部断面図、
第４図は陽極板の斜視図、第５図は内情の斜視図、第６
図は本考案による渦巻式有機電解質電池と従来の渦巻式
有機電解質電池の放電特性図、第７図は従来の渦巻式有
機電解質電池の断面図である。 ６・・・・・・集電体、９・・・・・・内情、９ａ・・
・・・・切欠部、１０・・・・・・外缶。Fig. 1 is a partial cross-sectional view of a spiral organic electrolyte battery showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along line Y-Y in Fig. 2. A cross-sectional view of the main parts of
Figure 4 is a perspective view of the anode plate, Figure 5 is a perspective view of internal details, and Figure 6 is a perspective view of the anode plate.
The figure is a discharge characteristic diagram of the spiral organic electrolyte battery according to the present invention and the conventional spiral organic electrolyte battery, and FIG. 7 is a cross-sectional view of the conventional spiral organic electrolyte battery. 6... Current collector, 9... Internal information, 9a...
...Notch, 10...Outer can.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電池容器としての外缶１０の内側に配置される内情９に
、渦巻状に巻回した電極板を収納する渦巻式電池におい
て、内情９の側壁の下端部に切欠部９ａを設け、該切欠
部９ａより集電体６の端部を引き出し、内情９の側壁の
外面にそって折り返し、内情９と外缶１０との間で挟持
したことを特徴とする渦巻式電池。In a spiral battery in which a spirally wound electrode plate is housed in an inner case 9 disposed inside an outer can 10 as a battery container, a notch 9a is provided at the lower end of the side wall of the inner case 9. A spiral type battery characterized in that the end of the current collector 6 is pulled out from 9a, folded back along the outer surface of the side wall of the inner case 9, and held between the inner case 9 and the outer case 10.