JPH1154105A - Alkaline storage battery and manufacture thereof - Google Patents
Alkaline storage battery and manufacture thereofInfo
- Publication number
- JPH1154105A JPH1154105A JP9206826A JP20682697A JPH1154105A JP H1154105 A JPH1154105 A JP H1154105A JP 9206826 A JP9206826 A JP 9206826A JP 20682697 A JP20682697 A JP 20682697A JP H1154105 A JPH1154105 A JP H1154105A
- Authority
- JP
- Japan
- Prior art keywords
- lead plate
- current
- current collecting
- collecting lead
- storage battery
- 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.)
- Granted
Links
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】本発明は、一方極の端子を兼ねる開口部を
備えた電池ケースと、この開口部を密封する他方極の端
子を兼ねる封口体と、これら電池ケースおよび封口体よ
りなる電池容器内に組み込まれる少なくとも正・負極か
らなる発電要素と、この発電要素の正・負極の端部にそ
れぞれ接続される正・負極集電体とを備えたアルカリ蓄
電池およびその製造方法に関するものであり、特に、正
・負極の少なくとも一方から導出した集電リード板を封
口体の下面に溶接する集電構造および溶接方法に関する
ものである。The present invention provides a battery case having an opening serving also as a terminal of one pole, a sealing body serving also as a terminal of the other pole for sealing this opening, and a battery case comprising the battery case and the sealing body. The present invention relates to an alkaline storage battery including at least a positive / negative power generating element incorporated therein, and a positive / negative current collector connected to the positive / negative electrode ends of the positive / negative electrode of the power generating element and a method for manufacturing the same, particularly The present invention relates to a current collecting structure and a welding method for welding a current collecting lead plate derived from at least one of a positive electrode and a negative electrode to a lower surface of a sealing body.
【０００２】[0002]
【従来の技術】一般に、ニッケル−カドミウム蓄電池、
ニッケル−水素化物蓄電池などのアルカリ蓄電池は、正
極板および負極板の間にセパレータを介在させて、これ
らを渦巻状に巻回して発電要素を形成し、この発電要素
を金属製電池ケースに収納して正極の集電リード板を封
口体の一箇所で溶接した後、電池ケースの開口に絶縁ガ
スケットを介在させて封口体を装着することにより密閉
して構成されている。2. Description of the Related Art Generally, nickel-cadmium storage batteries,
An alkaline storage battery such as a nickel-hydride storage battery has a separator interposed between a positive electrode plate and a negative electrode plate, and spirally winds them to form a power generating element. After the current collecting lead plate is welded at one location of the sealing body, the sealing body is hermetically sealed by mounting the sealing body with an insulating gasket interposed in the opening of the battery case.
【０００３】ところで、アルカリ蓄電池は、電動工具、
電動自転車、および電動バイク等の電源として使用する
用途がある。これらの用途では、しばしば大電流での充
放電が要求されるが、電池を大電流で放電させると内部
抵抗に起因した電圧降下が生じ作動電圧が低下するとい
う問題があるため、極力内部抵抗を低減する必要があ
る。[0003] By the way, the alkaline storage battery is a power tool,
There are applications for use as a power source for electric bicycles and electric motorcycles. In these applications, charging / discharging with a large current is often required.However, discharging a battery with a large current has a problem that a voltage drop due to the internal resistance occurs and the operating voltage decreases. Need to reduce.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
たような集電リード板を封口体の一箇所で溶接して集電
したアルカリ蓄電池では、電池内部抵抗が十分に満足で
きる程度には低くなっていない。そこで、本発明は上記
問題点に鑑みてなされたものであって、電池内部抵抗が
低くて大電流で放電しても作動電圧が低下しにくいアル
カリ蓄電池を得ることにある。However, in an alkaline storage battery obtained by welding the above-described current collecting lead plate at one place of the sealing body, the internal resistance of the battery is low enough to be sufficiently satisfied. Absent. The present invention has been made in view of the above problems, and an object of the present invention is to provide an alkaline storage battery having a low internal resistance and a low operating voltage even when discharged with a large current.
【０００５】[0005]
【課題を解決するための手段およびその作用・効果】本
発明のアルカリ蓄電池は、一方極の端子を兼ねる開口部
を備えた電池ケースと、前記開口部を密封する他方極の
端子を兼ねる封口体と、これら電池ケースおよび封口体
よりなる電池容器内に組み込まれる少なくとも正・負極
からなる発電要素と、この発電要素の正・負極の端部に
それぞれ接続される正・負極集電体とを備え、正・負極
集電体の少なくともいずれか一方から延出する集電リー
ド板を封口体と溶接した第１溶接部と、この第１溶接部
までの集電経路の途中で集電リード板を集電体と溶接し
た第２溶接部とを備えたことを特徴とするものである。The alkaline storage battery according to the present invention comprises a battery case having an opening serving also as one terminal, and a sealing body serving as the other terminal which seals the opening. And a power generating element including at least positive and negative electrodes incorporated in a battery container including the battery case and the sealing body, and positive and negative electrode current collectors respectively connected to ends of the positive and negative electrodes of the power generating element. A first welding portion in which a current collecting lead plate extending from at least one of the positive and negative electrode current collectors is welded to the sealing body; and a current collecting lead plate in a current collecting path to the first welding portion. A current collector and a welded second welded portion are provided.
【０００６】このように、集電リード板を封口体と溶接
した第１溶接部までの集電経路の途中で、さらに集電リ
ード板を集電体と溶接させた第２溶接部を備えるよにす
ると、集電体と封口体との間の抵抗値を低減させること
が可能となるので、電池の内部抵抗が低減され、大電流
で放電させたときの内部抵抗に起因する電圧降下が小さ
くなって、従来よりも高い作動電圧が得られる。As described above, a second welded portion in which the current collecting lead plate is welded to the current collector is provided in the middle of the current collecting path to the first welding portion in which the current collecting lead plate is welded to the sealing body. Then, the resistance between the current collector and the sealing body can be reduced, so that the internal resistance of the battery is reduced, and the voltage drop due to the internal resistance when discharged with a large current is small. As a result, a higher operating voltage than before can be obtained.
【０００７】そして、集電リード板に湾曲部を設けた
り、第２溶接部の集電リード板あるいは集電体のいずれ
か一方または双方に突出部を設けたり、第２溶接部の集
電リード板の断面積をほかの部分より小さくすることに
より、第２溶接部の溶接性を向上さて、第２溶接部の形
成を容易にしている。[0007] Then, a curved portion is provided on the current collecting lead plate, a protruding portion is provided on one or both of the current collecting lead plate and the current collector of the second welding portion, or a current collecting lead of the second welding portion is provided. By making the cross-sectional area of the plate smaller than that of the other portions, the weldability of the second weld is improved and the formation of the second weld is facilitated.
【０００８】一方、本発明のアルカリ蓄電池の製造方法
は、正・負極集電体の少なくともいずれか一方から延出
する集電リード板を封口体に溶接して第１溶接部を形成
する第１溶接工程と、発電要素を電池ケースに収納した
後、集電リード板の未溶接部分の一部を集電体の上面に
接触させた状態で電池ケースの開口部を封口体で密閉す
る密閉工程と、電池ケースと封口体との間に電流を流す
ことにより、集電リード板と集電体との接触部分を溶接
して第２溶接部を形成する第２溶接工程とを備えたこと
を特徴とするものである。On the other hand, according to the method of manufacturing an alkaline storage battery of the present invention, a first lead portion is formed by welding a current collecting lead plate extending from at least one of a positive electrode collector and a negative electrode current collector to a sealing body. A welding step and a sealing step of sealing the opening of the battery case with a sealing member while the power generation element is housed in the battery case and a part of the unwelded portion of the current collecting lead plate is in contact with the upper surface of the current collector. And a second welding step of forming a second weld by welding a contact portion between the current collecting lead plate and the current collector by flowing a current between the battery case and the sealing body. It is a feature.
【０００９】通常、電池を封口する場合には、封口体を
溶接した集電リード板を変形させることによって電池ケ
ースの封口部に封口体を装着して封口を行うため、集電
リード板は、電池構成後に封口体と極板を接続するのに
必要な最小限の長さよりも変形のために必要な長さの分
だけ長くなってしまう。これに対して、本発明のアルカ
リ蓄電池の製造法では、集電リード板の集電経路の途中
での集電体との接触部を、電池構成後に、電池の正・負
極外部端子間に電流を流すことで溶接させるため、集電
距離を短縮して電池の内部抵抗を低減することが可能で
ある。Usually, when the battery is sealed, the current collecting lead plate is welded to the sealing portion of the battery case by deforming the current collecting lead plate to which the sealing member is welded. After the battery is constructed, the length required for deformation is longer than the minimum length required for connecting the sealing body and the electrode plate. On the other hand, in the method for manufacturing an alkaline storage battery of the present invention, the contact portion of the current collecting lead plate with the current collector in the middle of the current collecting path is changed between the positive and negative external terminals of the battery after the battery is formed. Therefore, the current collecting distance can be shortened and the internal resistance of the battery can be reduced.
【００１０】また、集電リード板に湾曲部を設けたり、
接触部の集電リード板、集電体のいずれか一方または双
方に突出部を設けたり、あるいは、予め接触部の集電リ
ード板の断面積を他のどの部分よりも小さくすることに
よって、電池の正・負極外部端子間に電流を流すと、湾
曲部、突出部あるいは断面積が小さい部分の電流密度が
大きくなって、これらの部分の発熱量が大きくなるの
で、第２溶接部を容易に形成できるようになる。In addition, a curved portion may be provided on the current collecting lead plate,
By providing a projecting portion on one or both of the current collecting lead plate and the current collector of the contact portion, or making the sectional area of the current collecting lead plate of the contact portion smaller than any other portion in advance, the battery When a current is applied between the positive and negative external terminals, the current density of the curved portion, the protruding portion or the portion having a small cross-sectional area increases, and the calorific value of these portions increases. Can be formed.
【００１１】このような本発明のアルカリ蓄電池の製造
方法により、電池の封口後に、集電リード板をその集電
経路の途中において集電体と溶接する事が可能となり、
集電リード板による集電経路を短くして電池内部抵抗を
より低減することが可能となる。また、集電リード板と
集電体との接触面積を小さくすることにより、この部分
の溶接を少ない電気量で行うことが可能となる。According to the method for manufacturing an alkaline storage battery of the present invention, it is possible to weld the current collecting lead plate to the current collector in the middle of the current collecting path after sealing the battery.
By shortening the current collecting path by the current collecting lead plate, the internal resistance of the battery can be further reduced. In addition, by reducing the contact area between the current collecting lead plate and the current collector, it is possible to perform welding at this portion with a small amount of electricity.
【００１２】[0012]
【発明の実施の形態】以下に、本発明の実施形態を図を
参照して説明する。なお、図１は本発明をニッケル−カ
ドミウム蓄電池に適用した本実施形態のアルカリ蓄電池
の要部断面図であり、図２は本実施形態のアルカリ蓄電
池の封口前の要部を示す断面図であり、図３は本実施形
態のアルカリ蓄電池の封口前の封口体と集電リード板と
の溶接状態を示す平面図であり、図４は本実施形態のア
ルカリ蓄電池の集電体と集電リード板との溶接状態を示
す平面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of an alkaline storage battery of the present embodiment in which the present invention is applied to a nickel-cadmium storage battery, and FIG. 2 is a cross-sectional view of a main part of the alkaline storage battery of the present embodiment before sealing. FIG. 3 is a plan view showing a welded state between the sealing body and the current collecting lead plate of the alkaline storage battery of the present embodiment before sealing, and FIG. 4 is a plan view of the current collector and the current collecting lead plate of the alkaline storage battery of the present embodiment. It is a top view which shows the welding state with (a).
【００１３】本実施形態のニッケル−カドミウム蓄電池
は、パンチングメタル１１ａの表面にニッケル焼結多孔
体を形成した後、化学含浸法により水酸化ニッケルを主
体とする正極活物質を焼結多孔体内に充填して製造した
焼結式ニッケル正極１１と、同様に化学含浸法により水
酸化カドミウムを主体とする負極活物質をニッケル焼結
多孔体内に充填して製造した焼結式カドミウム負極１２
とを備えている。In the nickel-cadmium storage battery of this embodiment, after forming a nickel sintered porous body on the surface of the punching metal 11a, a positive electrode active material mainly composed of nickel hydroxide is filled in the sintered porous body by a chemical impregnation method. Sintered cadmium negative electrode 11 similarly manufactured by filling a nickel sintered porous body with a negative electrode active material mainly composed of cadmium hydroxide by a chemical impregnation method.
And
【００１４】これらのニッケル正極１１とカドミウム負
極１２は、これらの間にセパレータ１３を介在させて巻
回されており、こうして巻回して得た発電要素１０の上
面には、ニッケル正極１１の極板芯体であるパンチング
メタル１１ａの端部が露出し、また、発電要素の下面に
はカドミウム負極１２の極板芯体であるパンチングメタ
ルの端部（図示せず）が露出している。そして、この発
電要素１０の上下面にそれぞれ露出する正極芯体と負極
芯体には、それぞれ多数の開口を有する板状の正極集電
体１４と負極集電体（図示せず）が溶接されている。The nickel positive electrode 11 and the cadmium negative electrode 12 are wound with a separator 13 interposed therebetween. On the upper surface of the power generating element 10 obtained by the winding, an electrode plate of the nickel positive electrode 11 is provided. The end of the punching metal 11a as the core is exposed, and the end (not shown) of the punching metal as the electrode core of the cadmium negative electrode 12 is exposed on the lower surface of the power generating element. A plate-like positive electrode current collector 14 and a negative electrode current collector (not shown) each having a large number of openings are welded to the positive electrode core and the negative electrode core respectively exposed on the upper and lower surfaces of the power generating element 10. ing.
【００１５】そして、電池の製造時においては、図２お
よび図３に示すように、まず、前記発電要素１０を鉄に
ニッケルメッキを施した有底筒状の電池ケース２０内に
収納し、カドミウム負極１２に溶接された負極集電体
（図示せず）を電池ケース２０の内底面にスポット溶接
（図示せず）する。ついで、正極集電体１４から延出す
る正極集電リード板３０の先端近傍を封口体４０の底面
にスポット溶接し、第１溶接部αを形成する。When the battery is manufactured, first, as shown in FIGS. 2 and 3, the power generating element 10 is housed in a bottomed cylindrical battery case 20 made of nickel-plated iron, and cadmium is removed. A negative electrode current collector (not shown) welded to the negative electrode 12 is spot-welded (not shown) to the inner bottom surface of the battery case 20. Then, the vicinity of the tip of the positive electrode current collector lead plate 30 extending from the positive electrode current collector 14 is spot-welded to the bottom surface of the sealing body 40 to form a first welded portion α.
【００１６】ここにおいて、前記封口体４０は、底面に
円形の下方突出部を形成してなる蓋体４１と、正極キャ
ップ４２とこれら蓋体４１および正極キャップ４２間に
介在されるスプリング４３と弁板４４からなる弁体４５
とから構成されており、蓋体４１の中央にはガス抜き孔
４１ａが形成されている。また、正極集電リード板３０
は、封口体４０のガス抜き孔４１ａと対向する部分に透
孔３１が形成されており、この透孔３１の存在により、
電池内部ガス圧が上昇した場合においても、集電リード
板３０がガス抜き孔４１ａを塞ぐことではなく、電池内
部のガスを集電リード板３０の透孔３１を通して封口体
４０のガス抜き孔４１ａからスムーズに電池外部に放出
することができる。Here, the sealing body 40 includes a lid 41 having a circular downward protruding portion formed on the bottom surface, a positive electrode cap 42, a spring 43 interposed between the lid 41 and the positive electrode cap 42, and a valve. Valve body 45 composed of plate 44
In the center of the lid 41, a gas vent hole 41a is formed. Further, the positive electrode current collecting lead plate 30
Is formed with a through hole 31 at a portion of the sealing body 40 facing the gas vent hole 41a, and due to the presence of the through hole 31,
Even when the gas pressure inside the battery rises, the current collecting lead plate 30 does not block the gas vent hole 41a, but allows the gas inside the battery to pass through the through hole 31 of the current collecting lead plate 30 so that the gas vent hole 41a From the battery.
【００１７】こうして、第１溶接部αにおいて正極集電
リード板３０と封口体４０とを溶接した後、封口体４０
を電池ケース２０の開口部に絶縁ガスケット２２を介し
て配置し、電池ケース２０の開口端縁２１を内方にカシ
メつけることによって電池を封口して、公称容量１．７
ＡｈのＳＣサイズのニッケル−カドミウム蓄電池を組み
立てる。この封口時点では、正極集電リード板３０は、
正極集電体１４とβの位置において接触した状態になっ
ている。After the positive current collecting lead plate 30 and the sealing body 40 are welded at the first welding portion α, the sealing body 40
Is placed in the opening of the battery case 20 via the insulating gasket 22, and the opening edge 21 of the battery case 20 is crimped inward to seal the battery so that the nominal capacity is 1.7.
Assemble a nickel-cadmium storage battery of Ah SC size. At the time of sealing, the positive electrode current collecting lead plate 30 is
It is in contact with the positive electrode current collector 14 at the position β.
【００１８】上記のようにして組み立てた電池の正極キ
ャップ（正極外部端子）４２と電池ケース２０の底面
（負極外部端子）の間に、電池の放電方向に２４Ｖの電
圧を印加し、１ＫＡの電流を約１５ｍｓの時間流した。
この通電処理によって、図１に示すように正極集電リー
ド板３０と正極集電体１４との接触点βが溶接されて、
第２溶接部βが形成される。A voltage of 24 V is applied between the positive electrode cap (positive external terminal) 42 of the battery assembled as described above and the bottom surface of the battery case 20 (negative external terminal) in the discharge direction of the battery. For about 15 ms.
By this energization process, the contact point β between the positive electrode current collector lead plate 30 and the positive electrode current collector 14 is welded as shown in FIG.
The second weld β is formed.
【００１９】一方、比較例の蓄電池として、電池組立後
に第２溶接部βを形成する処理、即ち正極キャップ（正
極外部端子）４２と電池ケース２０の底面（負極外部端
子）の間に、電池の放電方向に２４Ｖの電圧を印加し、
１ＫＡの電流を約１５ｍｓの時間流す通電処理を施さ
ず、その他は上記実施形態と同一の方法でニッケル−カ
ドミウム蓄電池を作成した。On the other hand, as the storage battery of the comparative example, the process of forming the second welded part β after assembling the battery, that is, between the positive electrode cap (positive external terminal) 42 and the bottom surface of the battery case 20 (negative external terminal), Apply a voltage of 24V in the discharge direction,
A nickel-cadmium storage battery was produced in the same manner as in the above embodiment, except that no energization treatment was performed in which a current of 1 KA was passed for about 15 ms.
【００２０】上記のように作製した本実施形態のニッケ
ル−カドミウム蓄電池および比較例のニッケルーカドミ
ウム蓄電池の放電特性（放電電流に対する作動電圧の変
化）を測定すると図５に示すような結果となった。ここ
において、測定条件は、周囲温度２５℃において１．７
Ａの充電電流で７２分間充電した後、６０分間充電を休
止し、定電流（２Ａ、１０Ａ、２０Ａ、３０Ａ）で放電
して電池電圧が０．８Ｖに達した時点で放電を停止さ
せ、各放電電流（２Ａ、１０Ａ、２０Ａ、３０Ａ）に対
する作動電圧（Ｖ）を測定するものである。The discharge characteristics (changes in the operating voltage with respect to the discharge current) of the nickel-cadmium storage battery of the present embodiment and the nickel-cadmium storage battery of the comparative example manufactured as described above were measured, and the results shown in FIG. 5 were obtained. . Here, the measurement condition is 1.7 at an ambient temperature of 25 ° C.
After charging for 72 minutes with the charging current of A, the charging was paused for 60 minutes, and the battery was discharged at a constant current (2 A, 10 A, 20 A, 30 A) and stopped when the battery voltage reached 0.8 V. It measures the operating voltage (V) with respect to the discharge current (2A, 10A, 20A, 30A).
【００２１】また、これらの電池の内部抵抗を測定した
結果、本発明電池は比較例電池よりも約０．５ｍΩ低く
なっていることが確認された。この図５から明らかなよ
うに、本実施形態のニッケル−カドミウム蓄電池は、１
０Ａ，２０Ａ，３０Ａ等の大電流放電時の作動電圧が比
較例電池よりも高くなっていることが分かる。これは第
２溶接部βの形成により、集電経路が短くなって電池の
内部抵抗が低下したためと考えられる。Further, as a result of measuring the internal resistance of these batteries, it was confirmed that the batteries of the present invention were lower by about 0.5 mΩ than the batteries of the comparative example. As is clear from FIG. 5, the nickel-cadmium storage battery according to the present embodiment has one battery.
It can be seen that the operating voltage at the time of discharging a large current such as 0 A, 20 A, and 30 A is higher than that of the comparative example battery. This is probably because the formation of the second welded part β shortened the current collection path and lowered the internal resistance of the battery.
【００２２】（集電リード板の検討）ついで、正極集電
リード板３０の形状、構造についての検討を行う。正極
集電リード板３０として上述の実施形態と同様の正極集
電リード板３０を用いて、上述の実施形態と同様にして
組み立てたニッケル−カドミウム蓄電池を電池Ａとす
る。図６に示すように、正極集電リード板３０の第１溶
接部αまでの集電経路の途中に湾曲部３２を形成した正
極集電リード板３０を用いて、上述の実施形態と同様に
して組み立てたニッケル−カドミウム蓄電池を電池Ｂと
する。図７に示すように、正極集電リード板３０の第１
溶接部αまでの集電経路の途中に突出部３３を形成した
正極集電リード板３０を用いて、上述の実施形態と同様
にして組み立てたニッケル−カドミウム蓄電池を電池Ｃ
とする。図８に示すように、正極集電リード板３０の正
極集電体１４との接触部の断面積を他の部分よりも小さ
くなるように挟幅部３４を形成した正極集電リード板３
０を用いて、上述の実施形態と同様にして組み立てたニ
ッケル−カドミウム蓄電池を電池Ｄとする。(Study of Current Collector Lead Plate) Next, the shape and structure of the positive electrode current collector lead plate 30 will be discussed. A nickel-cadmium storage battery assembled in the same manner as in the above-described embodiment using the same positive-electrode current-collecting lead plate 30 as the above-described embodiment as the positive-electrode current-collecting lead plate 30 is referred to as a battery A. As shown in FIG. 6, in the same manner as in the above-described embodiment, a positive current collecting lead plate 30 in which a curved portion 32 is formed in the current collecting path to the first welded portion α of the positive current collecting lead plate 30 is used. The nickel-cadmium storage battery assembled by the above is referred to as a battery B. As shown in FIG. 7, the first
A nickel-cadmium storage battery assembled in the same manner as in the above-described embodiment using a positive electrode current collecting lead plate 30 having a protruding portion 33 formed in the middle of the current collecting path up to the welding portion α
And As shown in FIG. 8, the positive electrode current collector lead plate 3 having the narrow width portion 34 formed so that the cross-sectional area of the contact portion of the positive electrode current collector lead plate 30 with the positive electrode current collector 14 is smaller than other portions.
The nickel-cadmium storage battery assembled in the same manner as in the above-described embodiment using 0 is referred to as a battery D.
【００２３】これらの電池に対し、電池の正極キャップ
（正極外部端子）と電池ケースの底面（負極外部端子）
の間に、電池の放電方向に２４Ｖの定電圧を印加して正
・負極間に１ＫＡの定電流を流して、溶接時間を変化さ
せて溶接部βを溶接すると下記の表１に示すような結果
となった。For these batteries, the positive electrode cap of the battery (positive external terminal) and the bottom of the battery case (negative external terminal)
In the meantime, a constant voltage of 24 V is applied in the discharge direction of the battery and a constant current of 1 KA flows between the positive electrode and the negative electrode to change the welding time to weld the welded part β, as shown in Table 1 below. The result was.
【００２４】[0024]
【表１】 [Table 1]
【００２５】なお、上記表１においては、溶接時間、即
ち電気量を変化させた場合の溶接部βでの溶接確率を示
したものであって、サンプル数は各１０個であり、１０
個中の何個が溶接部βを形成することができたかを示し
ている。In Table 1 above, the welding time, that is, the welding probability at the welded part β when the quantity of electricity is changed is shown.
It shows how many of the pieces could form the weld β.
【００２６】上記表１より明らかなように、電池Ｂ，
Ｃ，Ｄの正極集電リード板３０を使用したものは、電池
Ａの正極集電リード板３０を使用したものよりも小さな
電気量で溶接部βが形成されていることが分かる。これ
は、電池Ｂ，Ｃ，Ｄの正極集電リード板３０を使用した
場合、電池Ａの正極集電リード板３０を使用した場合よ
りも、正極集電リード板３０と正極集電体１４との接触
部βでの接触面積が小さくなっているため、接触部βで
の接触圧力が強くなり、かつ、正・負極端子間に電流を
流した際に、この部分βでの電流密度が大きくなって、
発熱量も大きくなっているため、溶接部βを小さな電気
量で形成できる。As apparent from Table 1 above, batteries B,
It can be seen that in the case of using the positive current collecting lead plate 30 of C and D, the welded part β is formed with a smaller amount of electricity than in the case of using the positive current collecting lead plate 30 of the battery A. This is because the positive current collecting lead plate 30 and the positive current collector 14 of the batteries B, C, and D are used more than the positive current collecting lead plate 30 of the battery A uses. The contact area at the contact portion β is small, the contact pressure at the contact portion β is high, and when a current flows between the positive and negative terminals, the current density at this portion β increases. Become,
Since the calorific value is also large, the welded part β can be formed with a small amount of electricity.
【００２７】なお、溶接部βの形成確率は、上記のよう
に溶接時間で変化するのみならず、印加する電流値によ
っても変化する。印加する電流値および時間について
は、電池のサイズには関係なく、それぞれ、最低でも３
００Ａ、０．２５ｍｓ以上必要である。ただし、極端に
過大な電流あるいは極端に長い時間、電流を印可した場
合には、正極集電リード板３０に溶断が生じるため、印
加する電流値と電流印加時間の積は正極集電リード板３
０が溶断しない範囲に設定しなければならない。The formation probability of the welded portion β varies not only with the welding time as described above, but also with the applied current value. Regarding the value of the applied current and the time, regardless of the size of the battery, at least 3
00A and 0.25 ms or more are required. However, when the current is applied for an extremely excessive current or for an extremely long time, the positive current collecting lead plate 30 is melted. Therefore, the product of the applied current value and the current application time is equal to the positive current collecting lead plate 3.
The value must be set so that 0 does not melt.
【００２８】また、流れる電流値が同じであれば、電池
に印加する電流の方向と溶接強度には相関性はなく、電
池に対して充電方向および放電方向のどちらに印加して
も同様の効果が得られた。If the value of the flowing current is the same, there is no correlation between the direction of the current applied to the battery and the welding strength, and the same effect is obtained when the current is applied to the battery in either the charging direction or the discharging direction. was gotten.
【００２９】なお、上記実施形態において、図７の正極
集電リード板３０を用いる場合には正極集電リード板３
０に突出部３３を形成した例について説明したが、正極
集電体１４の突出部３３に対向する部分にも突起部を設
けるようにしても良い。また、上記実施形態の電池は、
正極および負極のいずれも焼結式電極を用いた例につい
て説明したが、ペースト式などの非焼結式電極を用いた
電池で実験した場合も同様の結果が得られた。In the above embodiment, when the positive current collecting lead plate 30 shown in FIG.
Although the example in which the protruding portion 33 is formed at 0 has been described, a protruding portion may be provided at a portion of the positive electrode current collector 14 facing the protruding portion 33. Further, the battery of the above embodiment is
Although an example in which both the positive electrode and the negative electrode use a sintered electrode has been described, similar results were obtained in an experiment using a battery using a non-sintered electrode such as a paste type.
【図１】 本発明のアルカリ蓄電池の要部断面図であ
る。FIG. 1 is a sectional view of a main part of an alkaline storage battery of the present invention.
【図２】 本発明のアルカリ蓄電池の封口前の要部断面
図である。FIG. 2 is a sectional view of a main part of the alkaline storage battery of the present invention before sealing.
【図３】 本発明のアルカリ蓄電池の封口前の封口体と
集電リード板との溶接位置を示す平面図である。FIG. 3 is a plan view showing a welding position between a sealing body and a current collecting lead plate before sealing of the alkaline storage battery of the present invention.
【図４】 本発明のアルカリ蓄電池の封口体と集電リー
ド板との溶接位置（α）と集電体と集電リード板との溶
接位置（β）を示す平面図である。FIG. 4 is a plan view showing a welding position (α) between the sealing body and the current collecting lead plate of the alkaline storage battery of the present invention and a welding position (β) between the current collector and the current collecting lead plate.
【図５】 放電電流と作動電圧の関係を表す図である。FIG. 5 is a diagram illustrating a relationship between a discharge current and an operation voltage.
【図６】 図１の正極集電リード板と異なる正極集電リ
ード板を用いたアルカリ蓄電池の要部断面図である。6 is a cross-sectional view of a main part of an alkaline storage battery using a positive electrode current collecting lead plate different from the positive electrode current collecting lead plate of FIG. 1;
【図７】 図１の正極集電リード板と異なる他の集電リ
ード板を用いたアルカリ蓄電池の要部断面図である。FIG. 7 is a cross-sectional view of a main part of an alkaline storage battery using another current collecting lead plate different from the positive electrode current collecting lead plate of FIG. 1;
【図８】 図１の正極集電リード板と異なる他の正極集
電リード板を用いたアルカリ蓄電池の要部平面図であ
る。8 is a main part plan view of an alkaline storage battery using another positive electrode current collecting lead plate different from the positive electrode current collecting lead plate of FIG. 1;
１０…発電要素、１１…正極板、１２…負極板、１３…
セパレータ、１４…正極集電体、２０…電池ケース、２
１…開口端縁、２２…絶縁ガスケット、３０…集電リー
ド板、３１…透孔、３２…湾曲部、３３…突出部、３４
…挟幅部、４０…封口体、４１…蓋体、４１ａ…ガス抜
き孔、４２…正極キャップ（正極外部端子）、α…封口
前に形成した集電リード板と封口体の溶接部、β…封口
後に形成した集電リード板と集電体の溶接部Reference numeral 10: power generation element, 11: positive electrode plate, 12: negative electrode plate, 13:
Separator, 14: positive electrode current collector, 20: battery case, 2
DESCRIPTION OF SYMBOLS 1 ... Opening edge, 22 ... Insulating gasket, 30 ... Current collection lead plate, 31 ... Through-hole, 32 ... Bending part, 33 ... Projection part, 34
... Narrow width part, 40 ... Sealing body, 41 ... Lid, 41a ... Gas vent hole, 42 ... Positive electrode cap (Positive electrode external terminal), α ... Welded part between the current collecting lead plate and the sealing body formed before sealing, β … Welded part of current collector and current collector formed after sealing
Claims (8)
池ケースと、前記開口部を密封する他方極の端子を兼ね
る封口体と、これら電池ケースおよび封口体よりなる電
池容器内に組み込まれる少なくとも正・負極からなる発
電要素と、この発電要素の正・負極の端部にそれぞれ接
続される正・負極集電体とを備えたアルカリ蓄電池であ
って、 前記正・負極集電体の少なくともいずれか一方から延出
する集電リード板を前記封口体と溶接した第１溶接部
と、 前記第１溶接部までの集電経路の途中で前記集電リード
板を前記集電体と溶接した第２溶接部とを備えたことを
特徴とするアルカリ蓄電池。1. A battery case having an opening also serving as one terminal, a sealing body sealing the opening, also serving as a terminal of the other electrode, and a battery case comprising the battery case and the sealing body. An alkaline storage battery including at least a power generating element including a positive electrode and a negative electrode, and positive and negative electrode current collectors respectively connected to positive and negative electrode ends of the power generating element, wherein at least one of the positive and negative electrode current collectors A first welding portion in which a current collecting lead plate extending from either one is welded to the sealing body, and the current collecting lead plate is welded to the current collector in a current collecting path to the first welding portion. An alkaline storage battery comprising a second welded portion.
もにこの湾曲部を前記集電体との第２溶接部としたこと
を特徴とする請求項１に記載のアルカリ蓄電池。2. The alkaline storage battery according to claim 1, wherein a curved portion is provided on the current collecting lead plate, and the curved portion serves as a second welded portion with the current collector.
いは前記集電体のいずれか一方または双方に突出部を設
けたことを特徴とする請求項１に記載のアルカリ蓄電
池。3. The alkaline storage battery according to claim 1, wherein a protrusion is provided on one or both of the current collecting lead plate and the current collector of the second welded portion.
面積を同第２溶接部以外の集電リード板の断面積よりも
小さく形成したことを特徴とする請求項１から請求項３
のいずれかに記載のアルカリ蓄電池。4. The current collecting lead plate of the second welded portion has a sectional area smaller than that of the current collecting lead plate other than the second welded portion. 3
The alkaline storage battery according to any one of the above.
池ケースと、前記開口部を密封する他方極の端子を兼ね
る封口体と、これら電池ケースおよび封口体よりなる電
池容器内に組み込まれる少なくとも正・負極からなる発
電要素と、この発電要素の正・負極の端部にそれぞれ接
続される正・負極集電体とを備えたアルカリ蓄電池の製
造方法であって、 前記発電要素を前記電池ケースに収納した後、前記正・
負極集電体の少なくともいずれか一方から延出する集電
リード板を前記封口体に溶接して第１溶接部を形成する
第１溶接工程と、 前記集電リード板の前記第１溶接部までの集電経路の途
中の未溶接部分の一部を前記集電体の上面に接触させた
状態で前記電池ケースの開口部を前記封口体で密閉する
密閉工程と、 前記電池ケースと前記封口体との間に電流を流すことに
より、前記集電リード板と前記集電体との接触部分を溶
接して第２溶接部を形成する工程とを備えたことを特徴
とするアルカリ蓄電池の製造方法。5. A battery case having an opening serving also as one terminal, a sealing body sealing the opening serving as a terminal of the other electrode, and a battery case comprising the battery case and the sealing body. A method for manufacturing an alkaline storage battery comprising at least a power generating element including a positive electrode and a negative electrode, and positive and negative electrode current collectors respectively connected to ends of the positive and negative electrodes of the power generating element, wherein the power generating element includes a battery. After storing in the case,
A first welding step of forming a first welded portion by welding a current collecting lead plate extending from at least one of the negative electrode current collectors to the sealing body; and up to the first welding portion of the current collecting lead plate A sealing step of sealing an opening of the battery case with the sealing body in a state where a part of the unwelded part in the middle of the current collecting path is in contact with the upper surface of the current collector; and the battery case and the sealing body. Forming a second weld by welding a contact portion between the current collecting lead plate and the current collector by passing a current between the current collector lead plate and the current collector. .
もにこの湾曲部を前記密閉工程において前記集電体に接
触させ、 前記電池ケースと前記封口体との間に電流を流すことに
より前記第２溶接部を形成するようにしたことを特徴と
する請求項５に記載のアルカリ蓄電池の製造方法。6. The current collecting lead plate is provided with a curved portion, and the curved portion is brought into contact with the current collector in the sealing step, and a current is caused to flow between the battery case and the sealing member to thereby form the second portion. The method for producing an alkaline storage battery according to claim 5, wherein two welds are formed.
いずれか一方または双方に突出部を設けるとともにこの
突出部を前記密閉工程において前記集電リード板あるい
は前記集電体のいずれか一方または双方に接触させ、 前記電池ケースと前記封口体との間に電流を流すことに
より前記突出部の電流密度を大きくして前記第２溶接部
を形成するようにしたことを特徴とする請求項５に記載
のアルカリ蓄電池の製造方法。7. A projecting portion is provided on one or both of the current collecting lead plate and the current collector, and the projecting portion is provided on the current collecting lead plate or the current collector in the sealing step. The second welding portion is formed by contacting both of them and flowing a current between the battery case and the sealing body to increase the current density of the projecting portion. 3. The method for producing an alkaline storage battery according to claim 1.
面積を同第２溶接部以外の集電リード板の断面積よりも
小さく形成して同集電リード板の第２溶接部の比抵抗を
大きくし、 前記電池ケースと前記封口体との間に電流を流すことに
より前記比抵抗が大きく形成された第２溶接部の電流密
度を大きくして前記第２溶接部を形成するようにしたこ
とを特徴とする請求項５に記載のアルカリ蓄電池の製造
方法。8. A second welded portion of the current collecting lead plate, wherein a sectional area of the current collecting lead plate of the second welded portion is formed smaller than a sectional area of the current collecting lead plate other than the second welded portion. The second welded portion is formed by increasing the specific resistance of the second welded portion where the specific resistance is increased by flowing a current between the battery case and the sealing body. The method for manufacturing an alkaline storage battery according to claim 5, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20682697A JP3540554B2 (en) | 1997-07-31 | 1997-07-31 | Alkaline storage battery and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20682697A JP3540554B2 (en) | 1997-07-31 | 1997-07-31 | Alkaline storage battery and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1154105A true JPH1154105A (en) | 1999-02-26 |
| JP3540554B2 JP3540554B2 (en) | 2004-07-07 |
Family
ID=16529725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20682697A Expired - Fee Related JP3540554B2 (en) | 1997-07-31 | 1997-07-31 | Alkaline storage battery and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3540554B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6465122B1 (en) | 1999-08-27 | 2002-10-15 | Sanyo Electric Co., Ltd. | Storage battery and method of fabricating the same |
-
1997
- 1997-07-31 JP JP20682697A patent/JP3540554B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6465122B1 (en) | 1999-08-27 | 2002-10-15 | Sanyo Electric Co., Ltd. | Storage battery and method of fabricating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3540554B2 (en) | 2004-07-07 |
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