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JP4491191B2 - Cylindrical alkaline battery - Google Patents
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JP4491191B2 - Cylindrical alkaline battery - Google Patents

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Publication number
JP4491191B2
JP4491191B2 JP2002298336A JP2002298336A JP4491191B2 JP 4491191 B2 JP4491191 B2 JP 4491191B2 JP 2002298336 A JP2002298336 A JP 2002298336A JP 2002298336 A JP2002298336 A JP 2002298336A JP 4491191 B2 JP4491191 B2 JP 4491191B2
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Prior art keywords
negative electrode
electrode terminal
insulating
positive electrode
cylindrical alkaline
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JP2002298336A
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Japanese (ja)
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JP2004134268A (en
Inventor
正彦 鈴木
龍也 山崎
勝博 山下
吉郎 原田
龍夫 友森
義孝 本田
栄治 山根
英次 岡松
和彦 石原
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FDK Corp
Toyo Kohan Co Ltd
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FDK Corp
Toyo Kohan Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Description

【0001】
【発明の属する技術分野】
この発明は筒形アルカリ乾電池、とくに負極端子に誤接続の防止手段を施したものに関する。
【0002】
【従来の技術】
筒形アルカリ乾電池を複数個直列に接続して使用する場合、複数個の電池を縦列状態で収容する電池ホルダ(あるいは電池ボックス)が良く使用される。この場合、一部の電池が逆方向に収容されることによる誤接続が生じやすい。そこで、負極端子面の周縁部に複数の絶縁突起部を配置して接着固定することにより、負極端子同士の誤接続を形状的に防止するようにした筒形アルカリ電池が開発されている(特開平09−161762)。
【0003】
図3は上記絶縁突起部を有する筒形アルカリ乾電池の使用例を示す。同図の(a)に示すように、複数の筒形アルカリ乾電池10は電池ホルダ50に縦列状態で収容されて直列接続される。各電池10の負極端子面にはそれぞれ絶縁突起部31が接着固定されていて、たとえば(b)に示すように、一部の電池10が誤って逆方向に収容された場合は、その絶縁突起部31が隣り合う電池10の負極端子間に絶縁スペーサとして介在することにより、その負極端子同士の誤接続が形状的に防止される。
【0004】
絶縁突起部31は紫外線硬化型樹脂あるいはポリエステル樹脂からなり、負極端子面の周縁部に適宜間隔で配置されて、その端子面に接着固定される。
【0005】
【発明が解決しようとする課題】
上述した筒形アルカリ乾電池は、その負極端子面に絶縁突起部を配置して接着固定するという比較的単純な構成でもって誤接続を防止することができるが、たとえば電池をホルダに出し入れする際に受ける機械的荷重により、その絶縁突起部が負極端子面から剥がれて離脱してしまいやすい、という問題のあることが本発明者によってあきらかとされた。つまり、負極端子と絶縁突起部間の接着性が必ずしも十分でなく、このことが誤接続防止の信頼性を損ねていることが判明した。
【0006】
この発明は以上のような問題を鑑みてなされたもので、その目的は、アルカリ乾電池の基本的性能を損なうことなく、負極端子面の絶縁突起部による誤接続防止の信頼性を高めた筒形アルカリ電池を提供することにある。
【0007】
【課題を解決するための手段】
本発明による手段は、有底筒状の金属製正極缶内に正極合剤、セパレータ、ゲル状負極合剤が装填されるとともに、その正極缶の開口が負極端子および絶縁封口材により封口され、さらに、上記正極缶の底部が凸状の正極端子部を形成し、上記負極端子が平坦な負極端子面を形成する筒形アルカリ乾電池において、
上記負極端子面の周縁部に複数の絶縁突起部を配置して接着固定することにより負極端子同士の誤接続を形状的に防止するようになすとともに、上記絶縁突起部が接着固定される表面をFe−Ni合金層で形成し、
当該Fe−Ni合金層の表面でのFe/Ni比率を1〜100%とした
ことを特徴とする。
この手段により、アルカリ乾電池の基本的性能を損なうことなく、負極端子面の絶縁突起部による誤接続防止の信頼性を高めることができる。
【0008】
上記手段において、前記絶縁突起部が紫外線硬化型樹脂からなる筒形アルカリ乾電池とすれば、とくに好適である。
【0009】
【発明の実施の形態】
図1は、この発明の技術が適用された筒形アルカリ乾電池の実施例を示す。同図において、(a)は断面図、(c)は斜視図をそれぞれ示す。同図に示す電池10は、有底筒状の金属製正極缶11内に正極合剤13、セパレータ14、ゲル状負極合剤15が装填されるとともに、その正極缶11の開口が負極端子21および絶縁ガスケット23等により封口され、さらに、上記正極缶11の底部が凸状の正極端子部12を形成し、上記負極端子21が平坦な負極端子面を形成している。
【0010】
正極缶11はNi(ニッケル)メッキされた鋼板42をプレス等で有底筒状に加工した金属製であって、正極端子を兼ねる。正極合剤13は、二酸化マンガンあるいはオキシ水酸化ニッケル等の酸化剤を含む環状(または管状)の成形合剤であって、上記正極缶11内に圧入状態で装填される。この正極合剤13の内側にアルカリ電解液が含浸されるセパレータ14が配置され、このセパレータ14の内側にゲル状亜鉛を主剤とする負極合剤15が充填されている。そして、この負極合剤15中に負極集電子22が挿入されている。負極集電子22の上端部は負極端子21の内側面にスポット溶接等により接続されている。負極端子21は、絶縁ガスケット23等の封口材と共に、上記正極缶11の封口体を形成する。
【0011】
上記負極端子21の外側面すなわち負極端子面の周縁部には、複数の絶縁突起部31が配置されて接着固定されている。各突起部31はそれぞれ、正極端子部12の高さよりも低い突起をなす。この絶縁突起部31により、負極端子同士の誤接続が形状的に防止されるようになっている。
【0012】
負極端子21は金属製であって、上記絶縁突起部31が接着固定される負極端子面はFe−Ni合金層41で形成されている。この合金層41はNiメッキされた鋼板42を熱処理して形成することができる。このNi−Fe合金層41上に紫外線化型樹脂等を塗布あるいは付着させて硬化させることにより、その合金層41上に絶縁突起部31を形成することができる。このNi−Fe合金層41の表面に接着固定された絶縁突起部31は良好かつ安定な接着性を有し、たとえば電池ホルダへの出し入れなどによる機械的荷重が繰返し加えられても、剥離することなく誤接続防止機能を確実に維持できることが判明した。
【0013】
この場合、Fe−Ni合金層41は、その表面におけるNi分が3〜18g/m の範囲がとくに望ましいことが判明した。Ni分が3g/m 未満では耐食性が不十分になり、逆に、Ni分が18g/m を超えると、耐食性が飽和状態となる一方、表面にFe−Ni合金層を形成するための熱処理に要するエネルギー量が多くなって経済的でない。
【0014】
また、Fe−Ni合金層41は、その表面におけるFe/Ni比率(Niに対するFeの百分率)が1〜100%の範囲がとくに望ましいことが判明した。1%未満(0.01>Fe/Ni)では紫外線硬化型樹脂等からなる樹脂(または塗料)との密着性が不十分となり、逆に、100%を超えると(1<Fe/Ni)耐食性が悪くなる。
【0015】
以下、本発明の具体的な実施例を比較例とともに示す。
(実施例)
実施例および比較例として、図1に示した構造のアルカリ電池10を仕様(A〜M)を変えて複数種類(A〜M)作製した。各仕様(A〜M)はそれぞれ、負極端子31の表面材質とくにFe/Ni比率(%)だけが異なり、それ以外の構成は同じである。各仕様の負極端子31は共に、メッキ原板として冷延鋼板を使用し、公知のワット浴を使ってNiメッキを行った後、熱処理を行ったものであるが、その熱処理時間を変えることにより、表面のFe/Ni比率を変えた。
【0016】
表1は、各仕様(A〜M)の負極端子について、それぞれのNiメッキ厚(μm)、熱処理温度(℃)、および表面のFe/Ni比率(%)を示す。この場合、仕様(A〜G)は本発明の実施例であり、仕様(H〜M)は比較例である。
【0017】
【表1】

Figure 0004491191
【0018】
なお、表1において、Fe/Ni比率は、負極端子材料の表面におけるFe/NiをESCA分析(Electon Spectroscopy for Chemical Analysis )により測定した。この場合、Feの電子レベル2p3/2の強度とNiの電子レベル2p3/2の強度との比に感度を考慮し、Fe/Ni比率を求めた。
【0019】
各仕様(A〜GおよびH〜M)の負極端子についてそれぞれ、濡れ指数、樹脂塗布高さ、剥離頻度、耐食性の評価試験を行った。
【0020】
(濡れ指数)
濡れ指数は、JIS−K6768で規定される濡れ性評価試験により評価した。この指数が大きいほど濡れやすいことを示す。
【0021】
(樹脂塗布高さ)
樹脂塗布高さは、各仕様(A〜GおよびH〜M)の負極端子面にそれぞれ一定量(0.25g)のポリエステル樹脂を塗布して、その塗布後の高さを測定した。高さの測定は投影機を用いて行った。ポリエステル樹脂は塗布後の硬化により上記絶縁突起部31を形成する。
【0022】
(剥離頻度)
剥離頻度は、上記仕様(A〜GおよびH〜M)の負極端子面にそれぞれ形成された絶縁突起部の剥離頻度であって、図2に模式的に示す電池ホルダ50を用いて評価試験を行った。この試験用電池ホルダ50は、電池10の正極端子側にコイル状バネ51、負極端子側に板状バネ52をそれぞれ有し、電池10は両バネ51,52間に挟圧された状態でホルダ50に保持される。このホルダ50に電池を挿入するとき、負極端子面の絶縁突起部31が負極端子側の板バネ52に引っかかって機械的な剥離荷重を受けるようになっている。負極端子側の板状バネ52は、20Nのバネ圧を負極端子面に与えるように構成されている。この試験用電池ホルダ50に各仕様(A〜GおよびH〜M)の電池を挿入して上記絶縁突起部31の剥離試験を行った。この試験は、各仕様(A〜GおよびH〜M)ごとにそれぞれ300個のサンプル電池を使用して行い、各仕様ごとに剥離発生数を求めた。
【0023】
(耐食性)
耐食性は、恒温層保存による耐錆試験で行った。耐錆試験の条件は、表1に示した各仕様(A〜GおよびH〜M)の負極端子材料(5cm幅×10cm長)を、温度60℃、湿度95%RHの環境で2週間保存したとき錆発生頻度から評価した。錆発生頻度は、各仕様ごとにそれぞれ60個の試料を試験し、表面に錆が発生した試料数(発錆点数)で評価した。この発錆点数(発錆個数)が少ないほど、耐食性が良好であることを示す。
【0024】
表2は、各仕様(A〜GおよびH〜M)の負極端子について、上記濡れ指数(μN/cm)、上記樹脂塗布高さ(mm)、上記剥離頻度(剥離発生数)、および上記耐食性(発錆点数)の各試験結果を示す。
【0025】
【表2】
Figure 0004491191
【0026】
表3は、上記仕様(A〜GおよびH〜M)において、上記絶縁突起部31をポリエステル樹脂で形成した場合と紫外線硬化型樹脂で形成した場合の各剥離頻度(剥離発生数)を示す。この場合、剥離試験は、上述した試験用電池ホルダ50の負極端子側板状バネ52のバネ圧を、表2の試験条件(20N)よりもさらに厳しい25Nにして行った。
【0027】
【表3】
Figure 0004491191
【0028】
表1と表2に示すように、Fe/Ni比率が1〜100%の試料は、絶縁突起部31の剥離試験での耐剥離性が良好であり、耐食性も良好であった。耐食性(耐錆性)は、端子面での接触抵抗や電池の保存性能など、アルカリ乾電池の基本的な性能を確保する上で必要である。また、表3に示すように、絶縁突起部31の樹脂の種類をポリエステル樹脂から紫外線硬化型樹脂に変更することにより、試験条件(バネ圧)をさらに厳しくしても、良好な耐剥離性能を得ることができた。
【0029】
【発明の効果】
本発明によれば、負極端子の耐錆性や接触抵抗などのアルカリ乾電池として必要な基本性能を確保しつつ、絶縁突起部による誤接続防止の信頼性を高めた筒形アルカリ電池を得ることができる。
【図面の簡単な説明】
【図1】本発明の技術が適用された筒型アルカリ乾電池の断面図および斜視図である。
【図2】本発明の実施例および比較例を評価するために使用した試験用電池ホルダの概略構成図である。
【図3】絶縁突起部を有する筒形アルカリ乾電池の使用例を示す図である。
【符号の説明】
10 筒型アルカリ乾電池
11 金属製正極缶
12 正極端子部
13 正極合剤
14 セパレータ
15 ゲル状負極合剤
21 負極端子
22 負極集電子
23 絶縁ガスケット
31 絶縁突起部
41 Ni−Fe合金層
42 鋼板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylindrical alkaline battery, and particularly to a negative electrode terminal provided with means for preventing erroneous connection.
[0002]
[Prior art]
When using a plurality of cylindrical alkaline batteries connected in series, a battery holder (or a battery box) that houses a plurality of batteries in a tandem state is often used. In this case, erroneous connection is likely to occur due to some batteries being accommodated in the opposite direction. In view of this, a cylindrical alkaline battery has been developed in which a plurality of insulating protrusions are arranged and bonded and fixed to the peripheral edge of the negative electrode terminal surface to prevent erroneous connection between the negative electrode terminals in shape (special feature). Kaihei 09-161762).
[0003]
FIG. 3 shows an example of use of a cylindrical alkaline battery having the above-mentioned insulating protrusion. As shown to (a) of the figure, the some cylindrical alkaline battery 10 is accommodated in the battery holder 50 in the column state, and is connected in series. Insulating protrusions 31 are bonded and fixed to the negative electrode terminal surfaces of the respective batteries 10. For example, as shown in (b), when some batteries 10 are mistakenly accommodated in the opposite direction, the insulating protrusions 31 are provided. By interposing the part 31 as an insulating spacer between the negative electrode terminals of the adjacent batteries 10, erroneous connection between the negative electrode terminals is prevented in shape.
[0004]
The insulating protrusions 31 are made of an ultraviolet curable resin or a polyester resin, and are arranged at appropriate intervals on the peripheral edge of the negative electrode terminal surface, and are adhered and fixed to the terminal surface.
[0005]
[Problems to be solved by the invention]
The above-described cylindrical alkaline battery can prevent erroneous connection with a relatively simple configuration in which an insulating protrusion is disposed on the negative electrode terminal surface and bonded and fixed. For example, when the battery is inserted into and removed from the holder, The present inventor has revealed that there is a problem that the insulating protrusion is easily peeled off from the negative electrode terminal surface due to the mechanical load received. That is, it has been found that the adhesion between the negative electrode terminal and the insulating protrusion is not always sufficient, and this impairs the reliability of preventing erroneous connection.
[0006]
The present invention has been made in view of the above problems, and its purpose is a cylindrical shape that has improved reliability in preventing erroneous connection due to the insulating protrusion on the negative electrode terminal surface without impairing the basic performance of the alkaline battery. The object is to provide an alkaline battery.
[0007]
[Means for Solving the Problems]
The means according to the present invention is charged with a positive electrode mixture, a separator, and a gelled negative electrode mixture in a bottomed cylindrical metal positive electrode can, and the opening of the positive electrode can is sealed with a negative electrode terminal and an insulating sealing material, Furthermore, in the cylindrical alkaline dry battery in which the bottom of the positive electrode can form a convex positive electrode terminal portion and the negative electrode terminal forms a flat negative electrode terminal surface,
By arranging and fixing a plurality of insulating projections on the peripheral edge of the negative electrode terminal surface, it is possible to prevent erroneous connection between the negative electrode terminals in shape, and the surface on which the insulating projections are bonded and fixed. Formed of an Fe-Ni alloy layer,
The Fe / Ni ratio on the surface of the Fe-Ni alloy layer is 1 to 100% .
By this means, it is possible to improve the reliability of preventing erroneous connection due to the insulating protrusion on the negative electrode terminal surface without impairing the basic performance of the alkaline battery.
[0008]
In the above means, it is particularly suitable if the insulating projection is a cylindrical alkaline battery made of an ultraviolet curable resin .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a cylindrical alkaline dry battery to which the technology of the present invention is applied. In the figure, (a) is a sectional view and (c) is a perspective view. In the battery 10 shown in the figure, a positive electrode mixture 13, a separator 14, and a gelled negative electrode mixture 15 are loaded in a bottomed cylindrical metal positive electrode can 11, and the opening of the positive electrode can 11 has a negative electrode terminal 21. The bottom of the positive electrode can 11 forms a convex positive electrode terminal portion 12 and the negative electrode terminal 21 forms a flat negative electrode terminal surface.
[0010]
The positive electrode can 11 is made of metal obtained by processing a steel plate 42 plated with Ni (nickel) into a bottomed cylindrical shape with a press or the like, and also serves as a positive electrode terminal. The positive electrode mixture 13 is an annular (or tubular) molding mixture containing an oxidizing agent such as manganese dioxide or nickel oxyhydroxide, and is charged into the positive electrode can 11 in a press-fitted state. A separator 14 impregnated with an alkaline electrolyte is disposed inside the positive electrode mixture 13, and a negative electrode mixture 15 mainly containing gelled zinc is filled inside the separator 14. A negative electrode current collector 22 is inserted into the negative electrode mixture 15. The upper end of the negative electrode current collector 22 is connected to the inner surface of the negative electrode terminal 21 by spot welding or the like. The negative electrode terminal 21 forms a sealing body of the positive electrode can 11 together with a sealing material such as the insulating gasket 23.
[0011]
A plurality of insulating protrusions 31 are disposed and fixedly bonded to the outer surface of the negative electrode terminal 21, that is, the peripheral edge of the negative electrode terminal surface. Each protrusion 31 forms a protrusion that is lower than the height of the positive electrode terminal portion 12. The insulating protrusion 31 prevents the negative connection between the negative terminals in terms of shape.
[0012]
The negative electrode terminal 21 is made of metal, and the negative electrode terminal surface to which the insulating protrusion 31 is bonded and fixed is formed of an Fe—Ni alloy layer 41. This alloy layer 41 can be formed by heat-treating a steel plate 42 plated with Ni. The insulating protrusion 31 can be formed on the alloy layer 41 by applying or adhering an ultraviolet resin or the like on the Ni—Fe alloy layer 41 and curing it. The insulating protrusion 31 adhered and fixed to the surface of the Ni-Fe alloy layer 41 has good and stable adhesiveness, and can be peeled off even when a mechanical load is repeatedly applied to the battery holder, for example. It was found that the erroneous connection prevention function can be reliably maintained.
[0013]
In this case, the Fe—Ni alloy layer 41 has been found to be particularly desirable when the Ni content on the surface thereof is in the range of 3 to 18 g / m 2 . When the Ni content is less than 3 g / m 2 , the corrosion resistance becomes insufficient. Conversely, when the Ni content exceeds 18 g / m 2 , the corrosion resistance becomes saturated, while an Fe—Ni alloy layer is formed on the surface. The amount of energy required for the heat treatment increases, which is not economical.
[0014]
Further, it has been found that the Fe—Ni alloy layer 41 has a particularly desirable range of Fe / Ni ratio (percentage of Fe to Ni) in the range of 1 to 100%. If it is less than 1% (0.01> Fe / Ni), adhesion to a resin (or paint) made of an ultraviolet curable resin or the like is insufficient, and conversely if it exceeds 100% (1 <Fe / Ni) Becomes worse.
[0015]
Hereinafter, specific examples of the present invention are shown together with comparative examples.
(Example)
As examples and comparative examples, a plurality of types (A to M) of alkaline batteries 10 having the structure shown in FIG. 1 were produced by changing specifications (A to M). Each specification (A to M) is different only in the surface material of the negative electrode terminal 31, particularly the Fe / Ni ratio (%), and the other configurations are the same. Both negative electrode terminals 31 of each specification use a cold-rolled steel plate as a plating base plate, and after performing Ni plating using a known Watt bath, heat treatment was performed, but by changing the heat treatment time, The Fe / Ni ratio on the surface was changed.
[0016]
Table 1 shows the Ni plating thickness ([mu] m), the heat treatment temperature ([deg.] C.), and the Fe / Ni ratio (%) of the surface for the negative electrode terminal of each specification (A to M). In this case, the specifications (A to G) are examples of the present invention, and the specifications (H to M) are comparative examples.
[0017]
[Table 1]
Figure 0004491191
[0018]
In Table 1, the Fe / Ni ratio was measured by ESCA analysis (Electon Spectroscopy for Chemical Analysis) of Fe / Ni on the surface of the negative electrode terminal material. In this case, the Fe / Ni ratio was determined in consideration of the sensitivity of the ratio between the strength of the Fe electron level 2p3 / 2 and the strength of the Ni electron level 2p3 / 2.
[0019]
Each negative electrode terminal of each specification (A to G and H to M) was subjected to an evaluation test of a wetting index, a resin coating height, a peeling frequency, and corrosion resistance.
[0020]
(Wetting index)
The wetting index was evaluated by a wettability evaluation test defined by JIS-K6768. It shows that it is easy to get wet, so that this index | exponent is large.
[0021]
(Resin application height)
The resin application height was measured by applying a certain amount (0.25 g) of a polyester resin to the negative electrode terminal surface of each specification (A to G and HM) and measuring the height after the application. The height was measured using a projector. The polyester resin forms the insulating protrusion 31 by curing after application.
[0022]
(Peeling frequency)
The peeling frequency is the peeling frequency of the insulating protrusions formed on the negative electrode terminal surfaces of the above specifications (A to G and H to M), respectively, and an evaluation test is performed using the battery holder 50 schematically shown in FIG. went. The test battery holder 50 has a coil spring 51 on the positive terminal side of the battery 10 and a plate spring 52 on the negative terminal side. The battery 10 is held in a state of being sandwiched between the springs 51 and 52. 50. When a battery is inserted into the holder 50, the insulating protrusion 31 on the negative electrode terminal surface is caught by the leaf spring 52 on the negative electrode terminal side and receives a mechanical peeling load. The plate-like spring 52 on the negative electrode terminal side is configured to give a spring pressure of 20N to the negative electrode terminal surface. A battery having each specification (A to G and HM) was inserted into the test battery holder 50, and a peel test of the insulating protrusion 31 was performed. This test was performed using 300 sample batteries for each specification (A to G and HM), and the number of occurrences of peeling was determined for each specification.
[0023]
(Corrosion resistance)
Corrosion resistance was measured by a rust resistance test by storage at a constant temperature layer. The conditions of the rust resistance test were as follows. Negative electrode terminal materials (5 cm width × 10 cm length) of each specification (A to G and H to M) shown in Table 1 were stored for 2 weeks in an environment of temperature 60 ° C. and humidity 95% RH. It was evaluated from the rust occurrence frequency. The rust occurrence frequency was evaluated by the number of samples (rusting points) in which 60 samples were tested for each specification and rust was generated on the surface. The smaller the number of rusting points (the number of rusting), the better the corrosion resistance.
[0024]
Table 2 shows the wettability index (μN / cm), the resin application height (mm), the peeling frequency (number of peeling occurrences), and the corrosion resistance for the negative electrode terminals of each specification (A to G and H to M). Each test result of (rusting point number) is shown.
[0025]
[Table 2]
Figure 0004491191
[0026]
Table 3 shows each peeling frequency (the number of occurrences of peeling) when the insulating protrusion 31 is formed of a polyester resin and an ultraviolet curable resin in the above specifications (A to G and HM). In this case, the peel test was performed by setting the spring pressure of the negative electrode terminal side plate-like spring 52 of the test battery holder 50 described above to 25N, which is more severe than the test condition (20N) in Table 2.
[0027]
[Table 3]
Figure 0004491191
[0028]
As shown in Tables 1 and 2, the samples having an Fe / Ni ratio of 1 to 100% had good peel resistance in the peel test of the insulating protrusion 31 and also had good corrosion resistance. Corrosion resistance (rust resistance) is necessary to ensure basic performance of the alkaline battery such as contact resistance on the terminal surface and battery storage performance. In addition, as shown in Table 3, by changing the resin type of the insulating protrusion 31 from the polyester resin to the ultraviolet curable resin, even if the test conditions (spring pressure) are further strict, good peeling resistance performance is achieved. I was able to get it.
[0029]
【The invention's effect】
According to the present invention, it is possible to obtain a cylindrical alkaline battery with improved reliability for preventing erroneous connection by an insulating protrusion while ensuring basic performance necessary for an alkaline battery such as rust resistance and contact resistance of a negative electrode terminal. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view and a perspective view of a cylindrical alkaline battery to which the technology of the present invention is applied.
FIG. 2 is a schematic configuration diagram of a test battery holder used for evaluating examples and comparative examples of the present invention.
FIG. 3 is a view showing an example of use of a cylindrical alkaline battery having an insulating protrusion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Cylindrical alkaline battery 11 Metal positive electrode can 12 Positive electrode terminal part 13 Positive electrode mixture 14 Separator 15 Gel-like negative electrode mixture 21 Negative electrode terminal 22 Negative electrode current collector 23 Insulation gasket 31 Insulation protrusion part 41 Ni-Fe alloy layer 42 Steel plate

Claims (2)

有底筒状の金属製正極缶内に正極合剤、セパレータ、ゲル状負極合剤が装填されるとともに、その正極缶の開口が負極端子および絶縁封口材により封口され、さらに、上記正極缶の底部が凸状の正極端子部を形成し、上記負極端子が平坦な負極端子面を形成する筒形アルカリ乾電池において、
上記負極端子面の周縁部に複数の絶縁突起部を配置して接着固定することにより負極端子同士の誤接続を形状的に防止するようになすとともに、上記絶縁突起部が接着固定される表面をFe−Ni合金層で形成し、
当該Fe−Ni合金層の表面でのFe/Ni比率を1〜100%とした
ことを特徴とする筒形アルカリ乾電池。
A positive electrode mixture, a separator, and a gelled negative electrode mixture are loaded into a bottomed cylindrical metal positive electrode can, and the opening of the positive electrode can is sealed with a negative electrode terminal and an insulating sealing material. In the cylindrical alkaline dry battery in which the bottom part forms a convex positive electrode terminal part and the negative electrode terminal forms a flat negative electrode terminal surface,
By arranging and fixing a plurality of insulating projections on the peripheral edge of the negative electrode terminal surface, it is possible to prevent erroneous connection between the negative electrode terminals in shape, and the surface on which the insulating projections are bonded and fixed. Formed of an Fe-Ni alloy layer,
A cylindrical alkaline dry battery characterized in that the Fe / Ni ratio on the surface of the Fe-Ni alloy layer is 1 to 100% .
請求項1において、前記絶縁突起部が紫外線硬化型樹脂からなることを特徴とする筒形アルカリ乾電池。 2. The cylindrical alkaline dry battery according to claim 1, wherein the insulating protrusion is made of an ultraviolet curable resin .
JP2002298336A 2002-10-11 2002-10-11 Cylindrical alkaline battery Expired - Fee Related JP4491191B2 (en)

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