JP2506647B2 - Battery electrode - Google Patents

Battery electrode

Info

Publication number
JP2506647B2
JP2506647B2 JP60275349A JP27534985A JP2506647B2 JP 2506647 B2 JP2506647 B2 JP 2506647B2 JP 60275349 A JP60275349 A JP 60275349A JP 27534985 A JP27534985 A JP 27534985A JP 2506647 B2 JP2506647 B2 JP 2506647B2
Authority
JP
Japan
Prior art keywords
active material
sponge
porous body
taper
cracks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP60275349A
Other languages
Japanese (ja)
Other versions
JPS62133670A (en
Inventor
香 高田
英男 海谷
良二 坪井
省三 村田
信吾 津田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60275349A priority Critical patent/JP2506647B2/en
Publication of JPS62133670A publication Critical patent/JPS62133670A/en
Application granted granted Critical
Publication of JP2506647B2 publication Critical patent/JP2506647B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/32—Nickel oxide or hydroxide electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • H01M4/808—Foamed, spongy materials
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

Description

【発明の詳細な説明】 産業上の利用分野 本発明は電池用電極に関するものである。TECHNICAL FIELD The present invention relates to a battery electrode.

従来の技術 従来アルカリ蓄電池用ニッケル正極に、スポンジ状金
属多孔体を用いる場合は、基板の孔径が焼結式基板に比
較して大きく、多孔体中にペースト状の活物質混合物を
充填したのち乾燥し、ひきつづき加圧圧縮を行って極板
に強度をもたせる工程がとられていた。この極板にリー
ドを取り付ける方法としては、第３図の如くスポンジ状
金属ニッケル基板１の端部全体を活物質充填前に加圧圧
縮して、リード溶着部２を設け、このリード溶着部２に
リード（図示せず）を溶着させてから活物質充填部３に
活物質を充填していた。Conventional technology When a sponge-like metal porous body is used for a nickel positive electrode for a conventional alkaline storage battery, the pore size of the substrate is larger than that of a sintered type substrate, and the porous body is filled with a paste-like active material mixture and then dried. However, a step of continuously applying pressure and compression to give the electrode plate strength has been taken. As a method of attaching the leads to the electrode plate, as shown in FIG. 3, the entire end portion of the sponge-like metallic nickel substrate 1 is pressure-compressed before filling the active material to provide the lead welding portion 2. After the lead (not shown) was welded to the active material, the active material filling portion 3 was filled with the active material.

発明が解決しようとする問題点 上記の様なスポンジ状金属多孔体を基板とし、その端
部全体を加圧圧縮させてリードを溶着する方法では、ペ
ースト状活物質を充填、乾燥後に第４図の如く６の方向
に沿ってロール加圧すると、スポンジ状金属ニッケル基
板１の活物質充填部分３とリード溶着部分２との間でロ
ール加圧した際に発生する伸び応力７に大きな差異が生
じ、その境界部分で亀裂及び割れが生じやすいという欠
点があった。Problems to be Solved by the Invention In the method in which the sponge-like metal porous body as described above is used as a substrate and the leads are welded by pressurizing and compressing the entire end portions thereof, the paste-like active material is filled, and after drying, as shown in FIG. When the roll pressure is applied along the direction 6 as described above, a large difference occurs in the elongation stress 7 generated when the roll pressure is applied between the active material filling portion 3 of the sponge-like metallic nickel substrate 1 and the lead welding portion 2. However, there is a drawback that cracks and cracks are likely to occur at the boundary portion.

本発明は上記従来の問題点を解決するもので、亀裂及
び割れによるロール加圧工程における不良発生率の低減
及び極板の機械的強度の向上を図ることを目的とする。The present invention solves the above-mentioned conventional problems, and an object thereof is to reduce the occurrence rate of defects in the roll pressing process due to cracks and cracks and to improve the mechanical strength of the electrode plate.

問題点を解決するための手段 この目的を達成するために本発明の電池用電極は、ス
ポンジ状金属多孔体の端部にこの多孔体を加圧圧縮して
リード溶着部を設けるとともに、このリード溶着部の隣
にテーパー角度が15〜70゜のテーパー部分を有する活物
質充填部を設けたことを特徴とする。Means for Solving the Problems In order to achieve this object, a battery electrode of the present invention has a sponge-like metal porous body provided with a lead welding part by compressing and compressing the porous body at the end thereof. An active material filling portion having a tapered portion with a taper angle of 15 to 70 ° is provided next to the welded portion.

作用 この構成によって活物質充填部に活物質を充填後、極
板としての所定厚さに加工するためのロール加圧時に発
生する伸び応力は、活物質充填部のテーパー部分で少し
ずつ吸収される。即ちこのテーパー部分のスポンジ状金
属多孔体が活物質充填部とリード溶着部との間の伸び応
力の差を緩和減少させるので、この両部の境界付近で発
生しやすい亀裂及び割れを低減させることができ、放電
容量の確保と極板としての引張り強度を向上させられ
る。Action With this configuration, the elongation stress generated when the active material filling portion is filled with the active material and then pressed by the roll for processing into a predetermined thickness as the electrode plate is gradually absorbed by the taper portion of the active material filling portion. . That is, since the sponge-like metal porous body in the tapered portion alleviates and reduces the difference in elongation stress between the active material filled portion and the lead welded portion, cracks and cracks that tend to occur near the boundary between these two portions should be reduced. Therefore, the discharge capacity can be secured and the tensile strength of the electrode plate can be improved.

実 施 例 以下本発明の一実施例について図面を参照しながら説
明する。Example An example of the present invention will be described below with reference to the drawings.

第１図，第２図において１はスポンジ状金属多孔体、
２はこのスポンジ状金属多孔体の端部に加圧圧縮して設
けられたリード溶着部分、３はリード溶着部２の隣りに
設けられ、活物質充填部でθで示すテーパー角度５が90
゜〜10゜の範囲で加圧圧縮により設けたテーパー部分４
を有する。本実施例ではこのスポンジ状金属多孔体１に
金属ニッケル多孔体を使用し、活物質充填部３に活物質
を充填、乾燥及びロール加圧してニッケル正極板を作成
した。以上の様にして作成したニッケル正極板を単板加
工し、通常のペースト式カドミウム負極、セパレータ及
びKOH電解液を用いて、1000mAh相当の密閉型ニッケル−
カドミウム蓄電池を構成した。この電池を20℃で0.1C充
電及び0.2C放電して得られた２サイクル目の放電容量と
引張強度についての試験結果を第５図に示す。In FIGS. 1 and 2, 1 is a sponge-like metal porous body,
Reference numeral 2 denotes a lead welding portion provided by compressing and compressing at the end portion of the sponge-like metal porous body, 3 is provided next to the lead welding portion 2, and a taper angle 5 indicated by θ at the active material filling portion is 90.
Taper part 4 provided by pressure compression in the range of 10 ° to 10 °
Have. In this example, a metallic nickel porous body was used as the sponge-like metallic porous body 1, and the active material filling portion 3 was filled with the active material, dried and roll-pressed to prepare a nickel positive electrode plate. The nickel positive electrode plate prepared as described above is processed into a single plate, and using a normal paste-type cadmium negative electrode, a separator and a KOH electrolytic solution, 1000 mAh equivalent sealed nickel-
A cadmium storage battery was constructed. FIG. 5 shows the test results for the second cycle discharge capacity and tensile strength obtained by charging and discharging the battery at 0.1 C and 0.2 C at 20 ° C.

第５図のテーパー角度と引張強度との関係において、
テーパー角度90゜、つまりテーパーをつけない場合には
引張強度が0Kg/cmで極板が裂けてしまうかあるいは2Kg/
cm以下の低いレベルにあるのに対し、テーパー角度が０
゜に近づくにつれ引張強度が上がってゆくのがわかる。
また第５図のテーパー角度と放電容量との関係におい
て、テーパー角度が15゜以下になると放電容量が急激に
低下するのがわかる。これはスポンジ状金属ニッケル基
板の孔部が加圧により押しつぶされて活物質が充填でき
なくなるためである。In the relationship between the taper angle and the tensile strength in FIG. 5,
If the taper angle is 90 °, that is, if the taper is not attached, the tensile strength will be 0 Kg / cm and the electrode plate will tear or 2 Kg / cm.
The taper angle is 0, while the level is lower than cm.
It can be seen that the tensile strength increases as the angle approaches.
Further, in the relationship between the taper angle and the discharge capacity in FIG. 5, it can be seen that the discharge capacity sharply decreases when the taper angle becomes 15 ° or less. This is because the pores of the sponge-like metallic nickel substrate are crushed by the pressure and cannot be filled with the active material.

この結果、テーパー角度が70゜〜15゜の範囲で加圧す
ると、第２図に示す如く活物質充填部３に活物質を充填
後、スポンジ状金属ニッケル基板１に第２図６の方向に
沿ってロール加圧した際に発生する伸び応力７はテーパ
ー部分４で少しずつ吸収され、スポンジ状金属ニッケル
基板１の活物質充填部３とリード溶着部２との間の応力
差を減少させ、その境界附近で発生しやすい亀裂及び割
れを低減させることができ、活物質充填後のロール加圧
の工程上に必要な機械的強度が得られることがわかっ
た。As a result, when the taper angle is applied in the range of 70 ° to 15 °, the active material filling section 3 is filled with the active material as shown in FIG. 2 and then the sponge metal nickel substrate 1 is moved in the direction of FIG. The elongation stress 7 generated when the roll is pressed along is gradually absorbed by the taper portion 4, and the stress difference between the active material filling portion 3 of the sponge metal nickel substrate 1 and the lead welding portion 2 is reduced, It was found that cracks and cracks that tend to occur near the boundary can be reduced, and the mechanical strength necessary for the roll pressing process after filling the active material can be obtained.

発明の効果 本発明では、スポンジ状金属多孔体の端部にリード溶
着部を設けるとともに、このリード溶着部の隣にテーパ
ー角度15〜70゜のテーパー部分を有する活物質充填部を
設けたので、このテーパー部での活物質保持による放電
容量の確保と、加圧加工時のリード溶着部と活物質充填
部との間の伸び応力の差を緩和する作用により、極板と
しての放電容量、機械的強度を良好に保って、リード溶
着部と活物質充填部の境界部分での亀裂及び割れによる
不良発生率を著しく低減させることができる。EFFECTS OF THE INVENTION In the present invention, the lead welding portion is provided at the end of the sponge-like metal porous body, and the active material filling portion having the taper portion with a taper angle of 15 to 70 ° is provided next to the lead welding portion. By securing the discharge capacity by holding the active material in the taper part and relaxing the difference in the elongation stress between the lead welding part and the active material filling part during pressure processing, the discharge capacity as the electrode plate, mechanical It is possible to maintain good mechanical strength and significantly reduce the rate of occurrence of defects due to cracks and cracks at the boundary between the lead welding part and the active material filling part.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の一実施例によるスポンジ状金属ニッケ
ル基板の断面図、第２図は第１図の基板に活物質充填後
ロール加圧した際に生じる伸び応力を示す平面図、第３
図は従来のスポンジ状金属ニッケル基板の断面図、第４
図は第３図の基板に活物質充填後ロール加圧した際に生
じる伸び応力を示す平面図、第５図は各テーパー角度に
対する放電容量と引張強度との関係を示す図である。 １……スポジ状金属ニッケル基板、２……リード溶着
部、３……活物質充填部、４……テーパー部分、５……
テーパー角度。FIG. 1 is a cross-sectional view of a sponge-like metallic nickel substrate according to an embodiment of the present invention, FIG. 2 is a plan view showing elongation stress generated when roll-pressing after filling the substrate of FIG. 1 with an active material, and FIG.
The figure shows a cross-sectional view of a conventional sponge-like metallic nickel substrate, No. 4
FIG. 5 is a plan view showing the elongation stress generated when the substrate of FIG. 3 is charged with a roll after being filled with the active material, and FIG. 5 is a view showing the relationship between the discharge capacity and the tensile strength with respect to each taper angle. 1 ... Spigot-like metallic nickel substrate, 2 ... Lead welding part, 3 ... Active material filling part, 4 ... Tapered part, 5 ...
Taper angle.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田 省三 門真市大字門真1006番地 松下電器産業 株式会社内 (72)発明者 津田 信吾 門真市大字門真1006番地 松下電器産業 株式会社内 (56)参考文献 特開 昭56−86459（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shozo Murata 1006 Kadoma, Kadoma, Matsushita Electric Industrial Co., Ltd. (72) Shingo Tsuda 1006 Kadoma, Kadoma, Matsuda Electric Co., Ltd. (56) Reference Document JP-A-56-86459 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】スポンジ状金属多孔体の端部にこの多孔体
を加圧圧縮してリード溶着部を設けるとともに、このリ
ード溶着部の隣にテーパー角度15〜70゜のテーパー部分
を有する活物質充填部を設けたことを特徴とする電池用
電極。1. An active material having a lead-welded portion by compressing and compressing the porous body at an end portion of a sponge-like metal porous body, and having a taper portion having a taper angle of 15 to 70 ° next to the lead-welded portion. An electrode for a battery, which is provided with a filling portion.
JP60275349A 1985-12-06 1985-12-06 Battery electrode Expired - Lifetime JP2506647B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60275349A JP2506647B2 (en) 1985-12-06 1985-12-06 Battery electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60275349A JP2506647B2 (en) 1985-12-06 1985-12-06 Battery electrode

Publications (2)

Publication Number Publication Date
JPS62133670A JPS62133670A (en) 1987-06-16
JP2506647B2 true JP2506647B2 (en) 1996-06-12

Family

ID=17554232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60275349A Expired - Lifetime JP2506647B2 (en) 1985-12-06 1985-12-06 Battery electrode

Country Status (1)

Country Link
JP (1) JP2506647B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4017919A1 (en) * 1990-06-02 1991-12-05 Varta Batterie GAS-DENSITY ALKALINE ACCUMULATOR
FR2714213B1 (en) * 1993-12-17 1996-02-02 Accumulateurs Fixes Electrode plate with a metal foam type support for an electrochemical generator, and method for obtaining such an electrode.
FR2800917B1 (en) 1999-11-10 2002-01-25 Cit Alcatel THREE-DIMENSIONAL SUPPORT ELECTRODE FOR USE IN AN ALKALI ELECTROLYTE SECONDARY GENERATOR
JP2015060749A (en) * 2013-09-19 2015-03-30 三菱マテリアル株式会社 Porous body

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5686459A (en) * 1979-12-14 1981-07-14 Matsushita Electric Ind Co Ltd Spiral-shaped electrode and manufacture thereof

Also Published As

Publication number Publication date
JPS62133670A (en) 1987-06-16

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