JP2013041795A - Cylindrical battery - Google Patents

Cylindrical battery Download PDF

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JP2013041795A
JP2013041795A JP2011179810A JP2011179810A JP2013041795A JP 2013041795 A JP2013041795 A JP 2013041795A JP 2011179810 A JP2011179810 A JP 2011179810A JP 2011179810 A JP2011179810 A JP 2011179810A JP 2013041795 A JP2013041795 A JP 2013041795A
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battery
gasket
cylindrical
cylindrical battery
opening
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JP5715907B2 (en
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Tomohisa Nozue
智久 野末
Hiroshi Hamada
浩 濱田
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FDK Energy Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical battery offering excellent discharge performance while maintaining sealing performance.SOLUTION: A cylindrical battery 1 has a cylindrical battery can 10 having a bottom, the opening of the battery can 10 having a bead 11 around the opening is swaged inward, an approximately disc-shaped sealing material 30 is attached to the opening through an intervening gasket 40, and the Rockwell hardness of the gasket is equal to or higher than 115 and equal to or lower than 122. The area ratio Ar represented by (A1-A2)/A1 is equal to or higher than 10% and lower than 17%, where A1 represents the horizontal cross-sectional area surrounded by the inner surface of the battery can at the part to which the sealing material is attached, where the horizontal direction is defined as the direction perpendicular to a cylindrical axis 50 of the battery can, and A2 represents the horizontal cross-sectional area surrounded by the inner surface of the battery can at the position where the inward protrusion of the battery can is the maximum due to the bead.

Description

本発明は、円筒形電池に関し、具体的には、周囲にビーディング部を有する有底円筒状の電池缶の開口が内方にかしめられて、当該開口に略円盤状の封口体がガスケットを介して嵌着されている円筒形電池に関する。   The present invention relates to a cylindrical battery, and more specifically, an opening of a bottomed cylindrical battery can having a beading portion around it is caulked inward, and a substantially disc-shaped sealing body is provided with a gasket in the opening. The present invention relates to a cylindrical battery that is inserted through the battery.

従来の円筒形電池の一例としてボビン形リチウム電池を挙げる。図１に当該ボビン形リチウム電池の構造を示した。当該図は、円筒軸５０の延長方向を上下（縦）方向としたときの円筒形電池１の縦断面を示している。円筒形電池１は、有底円筒状の電池缶１０、二酸化マンガン等の正極活物質を黒鉛等の導電助剤とともに中空円筒状に成形してなる正極合剤２１、円筒状の金属リチウムやリチウム合金からなる負極リチウム２２、円筒カップ状のセパレーター２３、ガスケット４０、封口体３０などによって構成されている（たとえば特許文献１参照）。   An example of a conventional cylindrical battery is a bobbin type lithium battery. FIG. 1 shows the structure of the bobbin type lithium battery. The drawing shows a longitudinal section of the cylindrical battery 1 when the extending direction of the cylindrical shaft 50 is the vertical (vertical) direction. The cylindrical battery 1 includes a bottomed cylindrical battery can 10, a positive electrode mixture 21 formed by forming a positive electrode active material such as manganese dioxide into a hollow cylindrical shape together with a conductive auxiliary such as graphite, a cylindrical metallic lithium or lithium A negative electrode lithium 22 made of an alloy, a cylindrical cup-shaped separator 23, a gasket 40, a sealing body 30 and the like (see, for example, Patent Document 1).

電池缶１０は、金属製で、電池ケースと正極集電体を兼ねている。その外底面には凸状の正極端子部１２がプレス加工により形成され、開口部近傍の周囲には絞り加工によるビーディング部１１が形成されている。円筒形電池１は、この電池缶１０内に、正極合剤２１、セパレーター２３、および負極リチウム２２が電解液とともに収納されているとともに、電池缶１０の開口端側に略円盤状の封口体３０がガスケット４０を介して嵌着されたものである。   The battery can 10 is made of metal and serves as both a battery case and a positive electrode current collector. A convex positive terminal portion 12 is formed on the outer bottom surface by press working, and a beading portion 11 is formed around the opening in the vicinity of the opening. In the cylindrical battery 1, a positive electrode mixture 21, a separator 23, and a negative electrode lithium 22 are stored together with an electrolyte in the battery can 10, and a substantially disc-shaped sealing body 30 is formed on the opening end side of the battery can 10. Is inserted through the gasket 40.

封口体３０は、負極端子板３１と封口板３２とから構成されており、負極端子板３１は金属製で、電池缶１０の開口を上方とすると、上方を底とした皿状で、皿の縁には、フランジが形成されている。封口板３２は、金属製の円板で、負極端子板３１の下方に積層される。また、ガスケット４０は、樹脂製で、図２に示したように、電池缶１０内に組み込まれる前の形状は、上方を開口４１とした円形カップ状で、円形の底部４２の周縁に上方に立設しながら周回する扁平筒状の側壁４４が一体的に形成されている。   The sealing body 30 is composed of a negative electrode terminal plate 31 and a sealing plate 32, and the negative electrode terminal plate 31 is made of metal. A flange is formed on the edge. The sealing plate 32 is a metal disk and is laminated below the negative electrode terminal plate 31. Further, the gasket 40 is made of resin, and as shown in FIG. 2, the shape before being incorporated into the battery can 10 is a circular cup shape having an opening 41 on the upper side, and the upper side around the periphery of the circular bottom portion 42. A flat cylindrical side wall 44 that circulates while standing is integrally formed.

図１に示した円筒形電池１の組み立て手順としては、まず、電池缶１０内に、発電要素である、正極合剤２１、セパレーター２３、および負極リチウム２２を順次装填する。負極リチウム２２は、板状の金属リチウムやリチウム合金を丸めたものであって、あらかじめ、その一部に帯状の金属薄板で形成された負極集電体を兼ねる負極リード３３の一端部３３ａが取り付けられている。   As a procedure for assembling the cylindrical battery 1 shown in FIG. 1, first, the positive electrode mixture 21, the separator 23, and the negative electrode lithium 22, which are power generation elements, are sequentially loaded in the battery can 10. The negative electrode lithium 22 is obtained by rolling plate-like metal lithium or a lithium alloy, and is attached in advance with one end 33a of a negative electrode lead 33 that also serves as a negative electrode current collector formed of a strip-like metal thin plate. It has been.

次に、電池缶１０の内方に環状に突出するビーディング部１１を座として、ガスケット４０を電池缶１０の開口端側に装着する。ガスケット４０の底部４２は、中央に開口４３を有して、この開口４３に上述した負極リード３３を挿通させつつ、当該負極リード３３の他端部３３ｂを封口板３２の下面に溶接する。そして、封口体３０をカップ状のガスケット４０内に圧入し、ガスケット４０の底部４２の上面４２ｉに封口体３０を積層させ、この状態で電池缶１０の開口端を内方にかしめ加工（カール絞り加工）する。それによって、封口体３０がガスケット４０を介して電池缶１０の開口端側に嵌着され、電池缶１０の内部が密閉される。   Next, the gasket 40 is mounted on the opening end side of the battery can 10 with the beading portion 11 projecting annularly inward of the battery can 10 as a seat. The bottom portion 42 of the gasket 40 has an opening 43 at the center, and the other end portion 33 b of the negative electrode lead 33 is welded to the lower surface of the sealing plate 32 while the negative electrode lead 33 is inserted into the opening 43. Then, the sealing body 30 is press-fitted into the cup-shaped gasket 40, and the sealing body 30 is laminated on the upper surface 42i of the bottom portion 42 of the gasket 40. In this state, the opening end of the battery can 10 is caulked inward (curl drawing). Processing). Thereby, the sealing body 30 is fitted to the opening end side of the battery can 10 via the gasket 40, and the inside of the battery can 10 is sealed.

図３は、図１における円１００内の拡大図であり、封口体３０が電池缶１０に嵌着されている状態を示している。図３に示したように、ガスケット４０の側壁４４は、封口体３０の周縁と電池缶１０の内面との間に挟持され、さらに、その側壁４４の上端部４５が、電池缶１０開口が内方に屈曲する形状に沿って屈曲し、封口体３０の周縁が、この側壁４４の屈曲部位とガスケット４０の底部４２の周縁とによって上下方向から挟持されている。   FIG. 3 is an enlarged view inside the circle 100 in FIG. 1, and shows a state where the sealing body 30 is fitted to the battery can 10. As shown in FIG. 3, the side wall 44 of the gasket 40 is sandwiched between the peripheral edge of the sealing body 30 and the inner surface of the battery can 10, and the upper end 45 of the side wall 44 has the opening of the battery can 10 inside. The sealing body 30 is bent along a shape that is bent in the direction, and the peripheral edge of the sealing body 30 is sandwiched between the bent portion of the side wall 44 and the peripheral edge of the bottom portion 42 of the gasket 40 from above and below.

ところで、ガスケット４０は、電池缶１０の内面と封口体３０の周縁とによって挟持されることで弾性変形し、電池缶１０を密閉する。そのため、ガスケット４０には適度な柔らかさ（硬度）が必要となる。そして、以下の特許文献２には、ガスケットのロックウェル硬度を１００以上とした筒形電池について記載されている。具体的には、実施例として、ロックウェル硬度が１０５のガスケットを用いた筒形電池について記載されている。   By the way, the gasket 40 is elastically deformed by being sandwiched between the inner surface of the battery can 10 and the peripheral edge of the sealing body 30 to seal the battery can 10. Therefore, the gasket 40 needs to have an appropriate softness (hardness). Patent Document 2 below describes a cylindrical battery in which the gasket Rockwell hardness is 100 or more. Specifically, as an example, a cylindrical battery using a gasket having a Rockwell hardness of 105 is described.

特開２００１−２７３９１１号公報JP 2001-273911 A 特開平１−２０９６５８号公報JP-A-1-209658

上述した円筒形電池では、ビーディング部を座にして電池缶内に装着されたカップ状のガスケットの内側に封口体を圧入している。そして、電池缶を内方にかしめて封口体をガスケットとともに電池缶開口に嵌着している。そのため、ビーディング部の深さ、すなわち、ビーディング部によって電池缶内方に突出する高さが高いほど、ガスケットが安定して載置され、封口性能が向上する。   In the above-described cylindrical battery, the sealing body is press-fitted inside the cup-shaped gasket mounted in the battery can with the beading portion as a seat. The battery can is crimped inward and the sealing body is fitted together with the gasket into the battery can opening. Therefore, the higher the depth of the beading portion, that is, the height at which the beading portion projects into the battery can, the more stably the gasket is placed and the sealing performance is improved.

しかしながら、電池缶内では、ビーディング部の下方が発電要素の収納空間となるので、ビーディング部を電池缶内方に大きく突出させるように形成すると、電池缶外方から見て、ビーディング部の上下方向の溝の幅が広くなり、結果的に、発電要素を収納する空間の高さ方向のサイズが減少し、発電要素の充填量が減少する。とくに、電解液は、かしめ加工に際して電池缶外に飛散する可能性もあることから、その充填量を少なくせざるを得ない。そのため、電池の放電性能が低下する。一方、ビーディング部の深さを浅くすると、かしめ加工時にガスケットがビーディング部から脱落して電池缶の下方に落ち込むなどして封口不良が発生する可能性がある。   However, in the battery can, since the lower part of the beading portion is a storage space for the power generation element, when the beading portion is formed so as to protrude largely inward of the battery can, the beading portion is seen from the outside of the battery can. As a result, the height of the space for storing the power generation element is reduced, and the filling amount of the power generation element is reduced. In particular, since the electrolytic solution may be scattered outside the battery can during the caulking process, the filling amount must be reduced. Therefore, the discharge performance of the battery is reduced. On the other hand, when the depth of the beading portion is reduced, there is a possibility that a sealing failure may occur due to the gasket falling off from the beading portion and falling below the battery can during caulking.

したがって、本発明は、封口性能を維持しつつ放電性能に優れた円筒形電池を提供することを目的としている。なお、その他の目的については以下の記載で明らかにする。   Therefore, an object of the present invention is to provide a cylindrical battery excellent in discharge performance while maintaining sealing performance. Other purposes will be clarified in the following description.

上記目的を達成するために、本発明者は、ガスケットの物性とビーディング部の深さとの関係に着目して鋭意研究を重ね、その結果、ガスケットの硬度とビーディング部の深さとの間に最適数値範囲が存在することを知見した。本発明は、その知見に基づきなされたものである。   In order to achieve the above object, the present inventor has conducted intensive research focusing on the relationship between the physical properties of the gasket and the depth of the beading portion, and as a result, between the hardness of the gasket and the depth of the beading portion. We found that there was an optimal numerical range. This invention is made | formed based on the knowledge.

そして本発明は、周囲にビーディング部を有する有底円筒状の電池缶の開口が内方にかしめられて、当該開口に略円盤状の封口体がガスケットを介して嵌着されている円筒形電池であって、
前記ガスケットは、ロックウェル硬度が１１５以上、１２２以下であり、
前記電池缶の円筒軸に直交する方向を水平方向として、前記封口体が嵌着されている部位での前記電池缶内方の水平断面積をＡ１とし、前記ビーディング部によって前記電池缶が最も内方に突出した位置における当該電池缶内方の水平断面積をＡ２としたときに、
（Ａ１−Ａ２）／Ａ１
で表される面積比が１０％以上、１７％未満である、
ことを特徴とした円筒形電池としている。より好ましくは、前記ガスケットが、ポリフェニレンサルファイドを主成分とした素材で形成されていることである。 The present invention provides a cylindrical shape in which an opening of a bottomed cylindrical battery can having a beading portion around it is caulked inward, and a substantially disc-shaped sealing body is fitted to the opening via a gasket. A battery,
The gasket has a Rockwell hardness of 115 or more and 122 or less,
The direction perpendicular to the cylindrical axis of the battery can is the horizontal direction, the horizontal cross-sectional area inside the battery can at the portion where the sealing body is fitted is A1, and the battery can is When the horizontal cross-sectional area inside the battery can at the position protruding inward is A2,
(A1-A2) / A1
The area ratio represented by is 10% or more and less than 17%.
The cylindrical battery is characterized by this. More preferably, the gasket is made of a material mainly composed of polyphenylene sulfide.

本発明に係る円筒形電池によれば、封口性能を維持しつつ放電性能を向上させることができる。   The cylindrical battery according to the present invention can improve discharge performance while maintaining sealing performance.

円筒形電池の一例であるボビン形リチウム電池の構造を示す図である。It is a figure which shows the structure of the bobbin type lithium battery which is an example of a cylindrical battery. 上記円筒形電池に採用されているガスケットの構造を示す図である。It is a figure which shows the structure of the gasket employ | adopted as the said cylindrical battery. 上記円筒形電池における封口状態を示す拡大図である。It is an enlarged view which shows the sealing state in the said cylindrical battery. 上記円筒形電池を構成する電池缶に形成されたビーディング部に関わる物理的なパラメーターを説明するための図である。It is a figure for demonstrating the physical parameter regarding the beading part formed in the battery can which comprises the said cylindrical battery.

＝＝＝円筒形電池＝＝＝
本発明の実施例に係る円筒形電池としてボビン形リチウム電池を挙げる。当該実施例のボビン形リチウム電池の基本的な構造は、図１に示したものと同じである。しかし、本実施例に係るボビン形リチウム電池１は、ガスケット４０の物性に関わるパラメーターと、電池缶１０のビーディング部１１に関わる物理的なパラメーターとが最適化されて、十分な封口強度を維持しつつ優れた放電性能を備えている。 === Cylindrical battery ===
A bobbin-type lithium battery is given as a cylindrical battery according to an embodiment of the present invention. The basic structure of the bobbin-type lithium battery of this example is the same as that shown in FIG. However, in the bobbin-type lithium battery 1 according to the present embodiment, the parameters related to the physical properties of the gasket 40 and the physical parameters related to the beading portion 11 of the battery can 10 are optimized to maintain sufficient sealing strength. However, it has excellent discharge performance.

なお、上述したガスケット４０の物性に関わるパラメーターは、ガスケット４０を構成する樹脂のロックウェル硬度であり、また、ビーディング部１１に関わる物理的なパラメーターについては、図４に具体的に示した。図４（Ａ）は、図１における点線矩形領域１０１内を拡大した縦断面図であり、（Ｂ）は、（Ａ）におけるａ−ａ矢視断面図である。（Ｂ）に示したように、ビーディング部１１の形成位置よりも下方から電池缶１０の開口方向を見ると、封口体３０が嵌着されている位置において電池缶１０の内面が縁取る円（以下、外円）１０ｏと、ビーディング部１１によって電池缶１０が最も内方に突出している位置において、その電池缶１０内面が縁取る円（以下、内円）１０ｉとによって、円環状の領域（図中、網点部分）１０ｒが形成される。そして、この円環状の領域１０ｒの面積と外円１０ｏの面積との比を上記ビーディング部１１における物理的なパラメーターとしている。以下に、上記物理的なパラメーター（以下、面積比Ａｒ）の定義と計算手順とを示す。   The parameter related to the physical properties of the gasket 40 described above is the Rockwell hardness of the resin constituting the gasket 40, and the physical parameters related to the beading portion 11 are specifically shown in FIG. 4A is a longitudinal cross-sectional view enlarging the inside of the dotted rectangular region 101 in FIG. 1, and FIG. 4B is a cross-sectional view taken along the line aa in FIG. As shown in (B), when the opening direction of the battery can 10 is viewed from below the position where the beading portion 11 is formed, the circle that the inner surface of the battery can 10 borders at the position where the sealing body 30 is fitted. (Hereinafter referred to as an outer circle) 10o and a circle (hereinafter referred to as an inner circle) 10i bordered by the inner surface of the battery can 10 at a position where the battery can 10 protrudes inwardly by the beading portion 11 has an annular shape. A region (halftone dot portion in the figure) 10r is formed. The ratio of the area of the annular region 10r and the area of the outer circle 10o is a physical parameter in the beading portion 11. Below, the definition of the said physical parameter (henceforth area ratio Ar) and a calculation procedure are shown.

上記円環状の領域１０ｒにおける外円１０ｏの面積をＡ１、内円１０ｉの面積をＡ２とすると、当該円環状の領域１０ｒの面積は、Ａ１−Ａ２であり、上記面積比Ａｒを、
Ａｒ＝（Ａ１−Ａ２）／Ａ１・・・（式１）
と規定する。 When the area of the outer circle 10o in the annular region 10r is A1, and the area of the inner circle 10i is A2, the area of the annular region 10r is A1-A2, and the area ratio Ar is
Ar = (A1-A2) / A1 (Formula 1)
It prescribes.

そして、外円１０ｏの直径を２ｒ（半径ｒ）、上記円環状領域１０ｒの幅、すなわちビーディング部１１によって電池缶１０内方に突出する高さをｈとすると、
Ａ１＝πｒ２・・・（式２）
Ａ２＝π（ｒ−ｈ）２・・・（式３）
であるから、上記面積比Ａｒは、（式２）と（式３）を（式１）に代入して
Ａｒ＝ｈ（２ｒ−ｈ）／ｒ２・・・（式４）
となる。 When the diameter of the outer circle 10o is 2r (radius r) and the width of the annular region 10r, that is, the height protruding inward of the battery can 10 by the beading portion 11, h is
A1 = πr 2 (Formula 2)
A2 = π (r−h) 2 (Equation 3)
Therefore, the area ratio Ar is calculated by substituting (Equation 2) and (Equation 3) into (Equation 1). Ar = h (2r−h) / r 2 (Equation 4)
It becomes.

＝＝＝放電性能試験・封口性能試験＝＝＝
本発明の実施例に係る円筒形電池１の性能を評価するために、ロックウェル硬度が異なる様々なガスケット４０と、上記Ａｒの値が異なる様々な電池缶１０とを用い、外形が、直径φ＝１７ｍｍ、高さｈ＝４５ｍｍとなるＣＲ８型ボビン形リチウム電池をサンプルとして作成し、各サンプルについて、放電性能試験と封口性能試験とを行った。なお、ロックウェル硬度はＲスケールでのロックウェル硬度（以下、硬度Ｈｒ）とした。 === Discharge performance test / sealing performance test ===
In order to evaluate the performance of the cylindrical battery 1 according to the embodiment of the present invention, various gaskets 40 having different Rockwell hardnesses and various battery cans 10 having different values of Ar are used. A CR8 type bobbin type lithium battery having a height of 17 mm and a height of h = 45 mm was prepared as a sample, and each sample was subjected to a discharge performance test and a sealing performance test. The Rockwell hardness was the Rockwell hardness on the R scale (hereinafter referred to as hardness Hr).

放電性能試験は、同じ製造条件のサンプルをそれぞれ５個用意し、各サンプルに対して５１０Ωの負荷で終止電圧２．０Ｖに至るまで連続放電させるまでの放電時間を計測することで行い、５個のサンプルの平均放電時間によって放電性能を評価した。   The discharge performance test was performed by preparing 5 samples each under the same manufacturing conditions and measuring the discharge time until continuous discharge until a final voltage of 2.0 V was reached with a load of 510Ω for each sample. The discharge performance was evaluated by the average discharge time of the samples.

また、封口性能試験は、同じ製造条件のサンプルをそれぞれ２０個用意し、８０℃の温度下で８０日間保存したときに、漏液の有無を目視によって確認することで行った。そして、同じ製造条件の２０個のサンプルの内、一個も漏液が発生しなければ、その製造条件のサンプルを合格とし、一個でも漏液が発生すれば不合格とした。   Moreover, the sealing performance test was performed by preparing 20 samples of the same production conditions, respectively, and visually confirming the presence or absence of leakage when stored at 80 ° C. for 80 days. If no leak occurred in 20 samples under the same manufacturing conditions, the sample under the manufacturing conditions was accepted, and if any leak occurred, the sample was rejected.

以下の表１に各サンプルについて、製造条件と性能評価試験の結果とを示した。

Figure 2013041795
Table 1 below shows the manufacturing conditions and the results of the performance evaluation test for each sample.
Figure 2013041795

まず、サンプルｓ１は、本発明の従来例であり、市販されているＣＲ８型ボビン形リチウム電池と同等の製造条件で作製した円筒形電池である。当該従来例のサンプルｓ１では、硬度Ｈｒ＝１１０のポリプロピレン（ＰＰ）製のガスケット４０を用い、ビーディング部１１の面積比Ａｒを１７％としている。この従来例のサンプルｓ１の放電時間は５１０ｈで、封口性能試験においては、高い信頼性を要する市販品であるので、当然のことながら、２０個中一つも漏液が発生しなかった。   First, the sample s1 is a conventional example of the present invention, and is a cylindrical battery manufactured under the same manufacturing conditions as a commercially available CR8 type bobbin type lithium battery. In the sample s1 of the conventional example, a polypropylene (PP) gasket 40 having a hardness Hr = 110 is used, and the area ratio Ar of the beading portion 11 is 17%. The discharge time of the sample s1 of this conventional example is 510h, and in the sealing performance test, it is a commercial product that requires high reliability.

サンプルｓ２は、サンプルｓ１と同様の硬度Ｈｒ＝１１０のＰＰ製ガスケット４０を用いつつ、放電性能の向上を試みるために作製されたものであり、ビーディング部１１の深さをサンプルｓ１の電池缶１０よりも浅くし、面積比Ａｒ＝１５％とした。しかし、２０個中４個に漏液が発生した。すなわち、従来と同等の硬度Ｈｒ＝１１０のガスケット４０では、封口性能を維持しつつ放電性能を向上させることが難しい、ということが確認できた。   The sample s2 was produced in order to try to improve the discharge performance while using the PP gasket 40 having the same hardness Hr = 110 as the sample s1, and the depth of the beading portion 11 was changed to the battery can of the sample s1. It was shallower than 10 and the area ratio Ar = 15%. However, leakage occurred in 4 out of 20. That is, it was confirmed that it was difficult to improve the discharge performance while maintaining the sealing performance with the gasket 40 having the same hardness Hr = 110 as that of the conventional one.

サンプルｓ３〜ｓ９は、従来例のサンプルｓ１よりも硬いガスケット４０を用いつつ、ビーディング部１１の面積比Ａｒを減少させたサンプルであり、これらのサンプルｓ３〜ｓ９に対する放電性能試験と封口性能試験とを通じて封口性能を維持しつつ放電性能の向上が可能な条件を求めた。なお、サンプルｓ３〜ｓ９は、ガスケット４０の素材として、ポリフェニレンサルファイド（ＰＰＳ）を主成分とした樹脂を用いている。ＰＰＳは、周知のごとく、エラストマーなどの軟質ポリマーと混合してポリマーアロイとすることができ、ＰＰＳに添加するエラストマーの種類や量により、硬度Ｈｒを自由に調整することができる。   Samples s3 to s9 are samples in which the area ratio Ar of the beading portion 11 is reduced while using the gasket 40 that is harder than the sample s1 of the conventional example, and the discharge performance test and the sealing performance test for these samples s3 to s9. The conditions under which the discharge performance can be improved while maintaining the sealing performance were obtained. Samples s3 to s9 use a resin mainly composed of polyphenylene sulfide (PPS) as a material of the gasket 40. As is well known, PPS can be mixed with a soft polymer such as an elastomer to form a polymer alloy, and the hardness Hr can be freely adjusted according to the type and amount of the elastomer added to the PPS.

もちろん、ガスケット４０の素材をＰＰなど他の樹脂としてもよいが、ＰＰは、ポリマーアロイのように硬度Ｈｒを容易に調整することができないため、硬度Ｈｒを調整するために複雑な製造工程を要する。そのため、硬度Ｈｒが異なる樹脂材料の調達に時間が掛かる。そこで、従来とは異なる硬度Ｈｒのガスケット４０が必要となるサンプルｓ３〜ｓ９では、ガスケット４０の素材として、樹脂材料メーカーなどからの原料調達が容易なＰＰＳを主成分としたポリマーアロイを採用した。   Of course, the material of the gasket 40 may be other resin such as PP. However, PP cannot easily adjust the hardness Hr like a polymer alloy, so that a complicated manufacturing process is required to adjust the hardness Hr. . Therefore, it takes time to procure resin materials having different hardness Hr. Therefore, in samples s3 to s9 that require a gasket 40 having a hardness Hr different from the conventional one, a polymer alloy mainly composed of PPS, which can be easily procured from a resin material manufacturer, is used as the material of the gasket 40.

まず、サンプルｓ３〜ｓ５では、サンプルｓ２において漏液が発生した面積比Ａｒ＝１５％を採用しつつ、ガスケット４０の硬度Ｈｒが従来例ｓ１よりも大きくなっている。そして、サンプルｓ４、ｓ５より、硬度Ｈｒを１１５以上とすると、面積比Ａｒ＝１５％でも漏液が発生せず、十分な封口性能が得られることが分かった。放電性能は、面積比Ａｒを減少させることにより従来例ｓ１よりも多くの発電要素、とくに電解液を電池缶１０内に充填できようになったため、従来例ｓ１の５１０ｈから５２３ｈに向上した。   First, in samples s3 to s5, the hardness ratio Hr of the gasket 40 is larger than that of the conventional example s1, while adopting the area ratio Ar = 15% in which leakage occurred in the sample s2. From samples s4 and s5, it was found that when the hardness Hr was 115 or more, no leakage occurred even at an area ratio Ar = 15%, and sufficient sealing performance was obtained. The discharge performance was improved from 510h of the conventional example s1 to 523h because the battery can 10 can be filled with more power generation elements, particularly the electrolyte, than the conventional example s1 by reducing the area ratio Ar.

次に、さらなる放電性能の向上を試みるため、サンプルｓ６、およびサンプルｓ７では、硬度Ｈｒを上記サンプルｓ３〜ｓ５から得た最小値Ｈｒ＝１１５としつつ、面積比Ａｒを１０％、および８％とした。その結果、サンプルｓ６では、放電性能が、従来例１ｃの５１０ｈに対し５２８ｈにまで向上し、漏液も発生しなかった。しかし、面積比Ａｒ＝８％としたサンプルｓ７では、２０個中２個に漏液が発生した。   Next, in order to further improve the discharge performance, in the samples s6 and s7, the hardness ratio Hr is set to the minimum value Hr = 115 obtained from the samples s3 to s5, and the area ratio Ar is 10% and 8%. did. As a result, in the sample s6, the discharge performance was improved to 528h as compared with 510h of the conventional example 1c, and no leakage occurred. However, in sample s7 in which the area ratio Ar = 8%, liquid leakage occurred in 2 of 20 samples.

以上、サンプルｓ３〜ｓ７における放電性能試験と封口性能試験の結果より、まず、ガスケット４０の硬度Ｈｒを１１５以上とすることで、ビーディング部１１の面積比Ａｒを従来例ｓ１の面積比Ａｒ＝１７％よりも減少させて放電性能の向上が可能であることが分かった。そして、封口性能を維持しつつ、放電性能を従来の円筒形電池に対して向上させるためには、まず、硬度ＨｒをＨｒ≧１１５とした上で、面積比Ａｒを１０％≦Ａｒ＜１７％とすればよいことが分かった。   As described above, from the results of the discharge performance test and the sealing performance test in samples s3 to s7, first, by setting the hardness Hr of the gasket 40 to 115 or more, the area ratio Ar of the beading portion 11 is set to the area ratio Ar of the conventional example s1 = It has been found that the discharge performance can be improved by reducing the content to less than 17%. In order to improve the discharge performance over the conventional cylindrical battery while maintaining the sealing performance, first, the hardness Hr is set to Hr ≧ 115, and the area ratio Ar is set to 10% ≦ Ar <17%. I found out that

表１におけるサンプルｓ８とｓ９は、サンプルｓ３〜ｓ７によって求められた硬度Ｈｒの下限１１５に対し、その硬度Ｈｒに上限が存在するか否かを確認するためのサンプルである。サンプルｓ８は、硬度Ｈｒ＝１２２で、サンプルｓ９は、硬度Ｈｒ＝１２３である。また、面積比Ａｒは、ともに下限値の１０％としている。そして、サンプルｓ８では漏液が発生せず、サンプルｓ９では漏液が発生した。目視検査によれば、サンプルｓ９では、本来は円形である封口体３０の平面形状が楕円形状に歪んでいるものが散見され、最終的に封口性能試験において、２０個中３個に漏液が発生した。このサンプルｓ９に対する封口性能試験の結果から、ガスケット４０は、硬度Ｈｒ＝１２３では硬すぎることが分かった。すなわち、ガスケット４０が硬すぎるため、かしめ加工に際して電池缶１０の円周方向に均一な圧力を安定して加えることが困難であることが確認できた。したがって、封口性能を維持しつつ放電性能に優れた円筒形電池１を達成するためには、ガスケット４０の硬度Ｈｒを、１１５≦Ｈｒ≦１２２とし、かつビーディング部１１の面積比Ａｒを１０％≦Ａｒ＜１７％とすればよいことが分かった。また、面積比Ａｒは、実際の測定値が存在する１０％≦Ａｒ≦１５％とすれば、より好ましい。   Samples s8 and s9 in Table 1 are samples for confirming whether or not an upper limit exists in the hardness Hr with respect to the lower limit 115 of the hardness Hr obtained by the samples s3 to s7. Sample s8 has hardness Hr = 122, and sample s9 has hardness Hr = 123. Further, the area ratio Ar is set to 10% of the lower limit value. Then, no leakage occurred in sample s8, and leakage occurred in sample s9. According to the visual inspection, in the sample s9, it is found that the originally round circular shape of the sealing body 30 is distorted into an elliptical shape. Finally, in the sealing performance test, 3 out of 20 leaks. Occurred. From the results of the sealing performance test on the sample s9, it was found that the gasket 40 was too hard at a hardness Hr = 123. That is, since the gasket 40 was too hard, it was confirmed that it was difficult to stably apply a uniform pressure in the circumferential direction of the battery can 10 during the caulking process. Therefore, in order to achieve the cylindrical battery 1 having excellent discharge performance while maintaining the sealing performance, the hardness Hr of the gasket 40 is 115 ≦ Hr ≦ 122, and the area ratio Ar of the beading portion 11 is 10%. It was found that ≦ Ar <17% was sufficient. The area ratio Ar is more preferably 10% ≦ Ar ≦ 15% where actual measurement values exist.

なお、封口性能を維持しつつ放電性能を向上させるためのガスケット４０のロックウェル硬度Ｈｒ、およびビーディング部１１に関わる面積比Ａｒの数値範囲は、ボビン形リチウム電池に限らず、周囲にビーディング部を有する有底円筒状の電池缶の開口が内方にかしめられて、その開口に略円盤状の封口体がガスケットを介して嵌着されているタイプの円筒形電池であれば適用可能である。   The numerical range of the Rockwell hardness Hr of the gasket 40 and the area ratio Ar related to the beading part 11 for improving the discharge performance while maintaining the sealing performance is not limited to the bobbin type lithium battery, and beading around the periphery This is applicable to any type of cylindrical battery in which the opening of a bottomed cylindrical battery can having a portion is caulked inward and a substantially disc-shaped sealing body is fitted to the opening via a gasket. is there.

本発明はボビン形リチウム電池などに利用可能である。   The present invention can be used for a bobbin type lithium battery or the like.

１ 円筒形電池（ボビン形リチウム電池）、１０ 電池缶、１１ ビーディング部、
１２ 正極端子部、２１ 正極合剤、２２ 負極リチウム、２３ セパレーター、
３０ 封口体、３１ 負極端子板、３２ 封口板、３３ 負極リード、
４０ ガスケット、４２ ガスケット底部、４４ ガスケット側壁、 1 cylindrical battery (bobbin type lithium battery), 10 battery can, 11 beading part,
12 positive electrode terminal part, 21 positive electrode mixture, 22 negative electrode lithium, 23 separator,
30 sealing body, 31 negative electrode terminal plate, 32 sealing plate, 33 negative electrode lead,
40 gasket, 42 gasket bottom, 44 gasket sidewall,

Claims (2)

周囲にビーディング部を有する有底円筒状の電池缶の開口が内方にかしめられて、当該開口に略円盤状の封口体がガスケットを介して嵌着されている円筒形電池であって、
前記ガスケットは、ロックウェル硬度が１１５以上、１２２以下であり、
前記電池缶の円筒軸に直交する方向を水平方向として、前記封口体が嵌着されている部位での前記電池缶内方の水平断面積をＡ１とし、前記ビーディング部によって前記電池缶が最も内方に突出した位置における当該電池缶内方の水平断面積をＡ２としたときに、
（Ａ１−Ａ２）／Ａ１
で表される面積比が１０％以上、１７％未満である、
ことを特徴とした円筒形電池。 A cylindrical battery in which an opening of a bottomed cylindrical battery can having a beading portion is crimped inward, and a substantially disc-shaped sealing body is fitted to the opening via a gasket,
The gasket has a Rockwell hardness of 115 or more and 122 or less,
The direction perpendicular to the cylindrical axis of the battery can is the horizontal direction, the horizontal cross-sectional area inside the battery can at the portion where the sealing body is fitted is A1, and the battery can is When the horizontal cross-sectional area inside the battery can at the position protruding inward is A2,
(A1-A2) / A1
The area ratio represented by is 10% or more and less than 17%.
A cylindrical battery characterized by that. 請求項１において、前記ガスケットは、ポリフェニレンサルファイドを主成分とした素材で形成されていることを特徴とする円筒形電池。   2. The cylindrical battery according to claim 1, wherein the gasket is made of a material mainly composed of polyphenylene sulfide.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035452A (en) * 1983-08-03 1985-02-23 Fuji Elelctrochem Co Ltd Nonaqueous electrolyte battery
JPH06251758A (en) * 1993-02-24 1994-09-09 A T Battery:Kk High capacity cylindrical battery
JPH08321287A (en) * 1995-03-20 1996-12-03 Matsushita Electric Ind Co Ltd Organic electrolyte battery
JPH1083800A (en) * 1996-09-10 1998-03-31 Kishimoto Akira Battery can and manufacture of dry battery using this can
JPH10255730A (en) * 1997-03-13 1998-09-25 Fuji Photo Film Co Ltd Beading method and device of cylindrical battery
JP2000030674A (en) * 1998-07-10 2000-01-28 Gs Melcotec Kk Cylindrical battery and capacitor
JP2006517725A (en) * 2003-02-11 2006-07-27 エヴァレディ・バッテリー・カンパニー・インコーポレイテッド Electrochemical cell with small volume cover assembly
JP2010080247A (en) * 2008-09-25 2010-04-08 Fdk Energy Co Ltd Battery can and alkaline battery
JP2011048976A (en) * 2009-08-26 2011-03-10 Toshiba Corp Battery

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035452A (en) * 1983-08-03 1985-02-23 Fuji Elelctrochem Co Ltd Nonaqueous electrolyte battery
JPH06251758A (en) * 1993-02-24 1994-09-09 A T Battery:Kk High capacity cylindrical battery
JPH08321287A (en) * 1995-03-20 1996-12-03 Matsushita Electric Ind Co Ltd Organic electrolyte battery
JPH1083800A (en) * 1996-09-10 1998-03-31 Kishimoto Akira Battery can and manufacture of dry battery using this can
JPH10255730A (en) * 1997-03-13 1998-09-25 Fuji Photo Film Co Ltd Beading method and device of cylindrical battery
JP2000030674A (en) * 1998-07-10 2000-01-28 Gs Melcotec Kk Cylindrical battery and capacitor
JP2006517725A (en) * 2003-02-11 2006-07-27 エヴァレディ・バッテリー・カンパニー・インコーポレイテッド Electrochemical cell with small volume cover assembly
JP2010080247A (en) * 2008-09-25 2010-04-08 Fdk Energy Co Ltd Battery can and alkaline battery
JP2011048976A (en) * 2009-08-26 2011-03-10 Toshiba Corp Battery

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