JP5995065B2 - Lead acid battery - Google Patents
Lead acid battery Download PDFInfo
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- JP5995065B2 JP5995065B2 JP2012136280A JP2012136280A JP5995065B2 JP 5995065 B2 JP5995065 B2 JP 5995065B2 JP 2012136280 A JP2012136280 A JP 2012136280A JP 2012136280 A JP2012136280 A JP 2012136280A JP 5995065 B2 JP5995065 B2 JP 5995065B2
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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
- 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
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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
- 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
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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Description
本発明は鉛蓄電池に係り、特に、電槽の蓋体の上面に開口する凹陥部内へ突出する極柱と接合される端子の位置決め構造に関する。 The present invention relates to a lead-acid battery, and more particularly to a positioning structure for a terminal joined to a pole column protruding into a recessed portion opened in an upper surface of a lid of a battery case.
鉛蓄電池は、電槽に収容した極板群から立設した極柱が電槽の蓋体の貫通穴から突出しており、前記突出した極柱の上端部に端子が接合された構造を有している。
特許文献１（実開平０２−０４４２４８号公報）には、具体的に、以下の構成が開示されている。
The lead storage battery has a structure in which a pole pole standing from a group of electrode plates housed in a battery case protrudes from a through hole in a lid of the battery case, and a terminal is joined to an upper end portion of the protruding pole pole. ing.
Specifically, Patent Document 1 (Japanese Utility Model Laid-Open No. 02-044248) discloses the following configuration.
図３（Ａ）（Ｂ）に示すように、電槽の蓋体１に貫通穴２が設けられている。極板群のストラップ（図示せず）から立設した極柱３が貫通穴２に挿入され、蓋体１の上面に開口する凹陥部４内に突出している。凹陥部４内に突出している極柱３の上端部に、端子５の取付部５ｂに形成された嵌合穴５ｃが嵌合され、極柱３の上端部と端子５の取付部５ｂとが、例えば、溶接により接合されて、極柱３の上端部と端子５の取付部５ｂとが収容された凹陥部４内に封口剤６が充填されている。
極柱３の上端部と端子５の取付部５ｂとが接合されるに当たっては、取付部５ｂに形成された嵌合穴５ｃが極柱３の上端部と嵌合した状態のときに、端子５が所定位置に位置決めされている必要がある。そこで、特許文献１には、凹陥部４の底部から上方に突出して付設された二つの相対する突起部７、７’が、取付部５ｂの幅方向の両側部に係合することによって、端子５の水平方向への変位を抑止する技術が開示されている。
As shown to FIG. 3 (A) (B), the through-hole 2 is provided in the cover body 1 of a battery case. A pole column 3 erected from a strap (not shown) of the electrode plate group is inserted into the through hole 2 and protrudes into a recessed portion 4 opened on the upper surface of the lid 1. A fitting hole 5c formed in the mounting portion 5b of the terminal 5 is fitted into the upper end portion of the pole column 3 protruding into the recessed portion 4, and the upper end portion of the pole column 3 and the mounting portion 5b of the terminal 5 are connected. For example, the sealing agent 6 is filled in the recessed portion 4 which is joined by welding and accommodates the upper end portion of the pole 3 and the mounting portion 5b of the terminal 5.
When the upper end portion of the pole column 3 and the attachment portion 5b of the terminal 5 are joined, the terminal 5 is formed when the fitting hole 5c formed in the attachment portion 5b is engaged with the upper end portion of the pole column 3. Must be positioned at a predetermined position. Therefore, in Patent Document 1, two opposing protrusions 7 and 7 ′ provided to protrude upward from the bottom of the recessed portion 4 engage with both side portions in the width direction of the mounting portion 5 b, so that the terminal A technique for suppressing the horizontal displacement of 5 is disclosed.
鉛蓄電池には、その端子に接続される導電線の種類によって、端子の形状変更を求められることがある。このような場合、鉛蓄電池の本体は同じであっても、形状の異なる複数種類の端子を準備し、要求に応じた形状の端子を選択して極柱と接合することになる。
しかしながら、上記特許文献に開示された技術では、極柱の上端部に嵌合した端子の位置決めのために、形状の異なる端子ごとに突起部７、７’の付設位置を変えた蓋体を準備しなければならない。端子形状に合わせた蓋体を成形するために複数の金型が必要になるとともに、複数の蓋体を管理する工数も増えてしまう。
The lead storage battery may be required to change the shape of the terminal depending on the type of conductive wire connected to the terminal. In such a case, even if the main body of the lead-acid battery is the same, a plurality of types of terminals having different shapes are prepared, and the terminals having a shape according to requirements are selected and joined to the pole column.
However, in the technique disclosed in the above-mentioned patent document, a lid is prepared in which the positions where the protrusions 7 and 7 ′ are attached are changed for each terminal having a different shape in order to position the terminal fitted to the upper end of the pole pole. Must. A plurality of molds are required to form a lid that matches the terminal shape, and the number of steps for managing the plurality of lids also increases.
上記の点に鑑み、本発明が解決しようとする課題は、１種類の蓋体で、予め準備された形状の異なる複数種類の端子の位置決めに対応できる蓋体を備えた鉛蓄電池を提供することである。 In view of the above points, the problem to be solved by the present invention is to provide a lead-acid battery including a lid that can handle positioning of a plurality of types of terminals having different shapes prepared in advance with one type of lid. It is.
本発明が対象とする鉛蓄電池は、次のような基本構成を有している。
すなわち、電槽の蓋体に設けられた貫通穴に極柱が挿入され、この極柱が前記蓋体の上面に開口する凹陥部内に突出している。そして、その極柱の上端部に、端子の取付部に形成された嵌合穴が嵌合され、極柱の上端部と端子の取付部とが接合されて、極柱の上端部と端子の取付部とが収容された前記凹陥部内に封口剤が充填されている鉛蓄電池である。
The lead storage battery targeted by the present invention has the following basic configuration.
That is, a pole column is inserted into a through hole provided in the lid of the battery case, and this pole column protrudes into a recessed portion that opens on the top surface of the lid. And the fitting hole formed in the attachment part of the terminal is fitted to the upper end part of the pole pole, the upper end part of the pole pole and the attachment part of the terminal are joined, and the upper end part of the pole pole and the terminal It is a lead storage battery in which a sealing agent is filled in the recessed portion in which the attachment portion is accommodated.
本発明は、このような鉛蓄電池において、上記課題を解決するために、本体が１種類の鉛蓄電池に対して形状の異なる複数種類の端子が予め準備されており、前記凹陥部内には、極柱の上端部と端子の取付部に形成された嵌合穴とが嵌合して端子が所定位置にあるときに、端子の外縁に当接することにより前記極柱を軸とする端子の少なくとも一方向への回動を制止する位置決め部材が前記複数種類の端子の形状のそれぞれに対応して設けられており、前記予め準備される端子は、前記嵌合穴を設けた基部から両側縁が平行に延び取付部を断面Ｌ字形に上方へ折り曲げた形状の平板端子と、前記嵌合穴を設けた基部から先に向かって両側縁間隔が狭くなるように延びる取付部に立設した円柱又は円錐台形状の柱状端子の２種類であり、前記位置決め部材が、前記平行に延びる両側縁の少なくとも一方に当接する第１部材と、前記第１部材より両側縁間の中央寄りで前記間隔が狭くなるように延びる両側縁の少なくとも一方に当接する第２部材である（請求項１）。
In order to solve the above-described problems, the present invention provides a plurality of types of terminals whose main bodies have different shapes with respect to one type of lead storage battery in advance, When the upper end portion of the column and the fitting hole formed in the mounting portion of the terminal are fitted and the terminal is in a predetermined position, at least one of the terminals having the pole column as an axis by contacting the outer edge of the terminal Positioning members for stopping rotation in the direction are provided corresponding to the shapes of the plurality of types of terminals, and the pre-prepared terminals are parallel on both side edges from the base portion where the fitting holes are provided. A flat plate terminal having a shape in which the mounting portion is bent upward in an L-shaped cross section, and a cylinder or a cone standing on the mounting portion extending so that the distance between the side edges decreases from the base portion where the fitting hole is provided There are two types of trapezoidal columnar terminals. A first member that abuts at least one of the side edges extending in parallel and a first member that abuts at least one of the side edges extending so as to be narrower toward the center between the side edges than the first member; There are two members (claim 1).
上記請求項１の発明における円柱又は円錐台形状の柱状端子は、円柱又は円錐台形状の代わりに平板形状であってもよい（請求項２）。
Pole terminals of cylindrical or frustoconical in the invention of the first aspect may be a plate shape instead of a cylindrical or frustoconical (claim 2).
さらに、上記請求項１又は２の発明において、前記第１部材と第２部材とは、相互に繋がっていることが好ましい（請求項３）。
Furthermore, in the invention of the first or second aspect , it is preferable that the first member and the second member are connected to each other (claim 3 ).
本発明によれば、本体が１種類の鉛蓄電池に対して形状の異なる複数種類の端子が予め準備されている場合に、極柱の上端部と端子の取付部に形成された嵌合穴とが嵌合して端子が所定位置にあるときに、前記形状の異なるそれぞれの端子の外縁に対応して当該外縁に当接して前記極柱を軸とする端子の少なくとも一方向への回動を制止する位置決め部材が蓋体の凹陥部内に配置されているので、１種類の蓋体を準備すれば済むという効果を得ることができる。
形状の異なる複数種類の端子のそれぞれの外縁に当接する部材同士が相互に繋がって位置決め部材が構成されているときは、凹陥部内に配置された置決め部材の強度を大きくできるので好都合である。
According to the present invention, when a plurality of types of terminals having different shapes with respect to one type of lead storage battery are prepared in advance, the fitting hole formed in the upper end portion of the pole column and the terminal mounting portion, When the terminal is in a predetermined position, the terminal contacts the outer edge corresponding to the outer edge of each terminal having a different shape and rotates the terminal around the pole column in at least one direction. Since the positioning member to be restrained is arranged in the recessed portion of the lid body, an effect that only one type of lid body needs to be prepared can be obtained.
When the positioning members are formed by connecting the members that contact the outer edges of the plurality of types of terminals having different shapes to each other, it is advantageous because the strength of the positioning member disposed in the recessed portion can be increased.
以下、図面を参照して、本発明の実施の形態について説明する。
図４は、本発明を適用する鉛蓄電池（制御弁式鉛蓄電池）の構成を示す一例である。負極板と正極板とを、その間にリテーナマットを挟んで交互に重ねた積層体とし、負極板の各集電耳部をまとめたストラップには負の極柱が立設され、正極板の各集電耳部をまとめたストラップには正の極柱が立設された極板群構成としている。この極板群が電槽に収容され、電槽の開口部に蓋体が接合される。蓋体の凹陥部に設けた貫通穴から、前記正と負の極柱が突出し、そのそれぞれの上端部に正と負の端子が接合されている。前記凹陥部は、極柱と端子の接合部を埋めるように充填剤で満たされている。蓋体には、所定の電池内圧で可逆的に開閉する制御弁を備えた排気栓が装着されている。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 4 is an example showing a configuration of a lead storage battery (control valve type lead storage battery) to which the present invention is applied. A negative electrode plate and a positive electrode plate are stacked in layers with sandwiching retainer mats between them, and a negative pole column is erected on a strap that collects current collecting ears of the negative electrode plate. The strap that collects the current collecting ears has an electrode plate group structure in which positive poles are erected. The electrode plate group is accommodated in the battery case, and a lid is joined to the opening of the battery case. The positive and negative pole columns protrude from a through hole provided in the recessed portion of the lid, and positive and negative terminals are joined to the respective upper ends thereof. The recessed portion is filled with a filler so as to fill the junction between the pole column and the terminal. An exhaust plug having a control valve that reversibly opens and closes with a predetermined battery internal pressure is attached to the lid.
極柱と端子の接合部位は、先に、図３（Ａ）（Ｂ）に基づいて説明したとおりである。すなわち、電槽の蓋体１に凹陥部４が形成されており、凹陥部４の底面に設けた貫通穴２から凹陥部４内へ極柱３が突出している。なお、図３（Ａ）では、貫通穴２が凹陥部４の底面に直接設けられた構成を示しているが、貫通穴を設けた鉛又は鉛合金製のブッシングを蓋体１にインサート成形しておき、このブッシングの貫通穴から凹陥部４内へ極柱３を突出させてもよい。
凹陥部４内に突出している極柱３の上端部に、端子５の取付部５ｂに形成された嵌合穴５ｃが嵌合され、極柱３の上端部と端子５の取付部５ｂとが、例えば、溶接により接合されて、極柱３の上端部と端子５の取付部５ｂとが収容された凹陥部４内にエポキシ樹脂等の封口剤６が充填されている。
The joint portion between the pole column and the terminal is as described above based on FIGS. 3 (A) and 3 (B). That is, the recessed part 4 is formed in the lid 1 of the battery case, and the pole 3 projects into the recessed part 4 from the through hole 2 provided on the bottom surface of the recessed part 4. 3A shows a configuration in which the through hole 2 is directly provided on the bottom surface of the recessed portion 4, a lead or lead alloy bushing provided with the through hole is insert-molded into the lid body 1. FIG. In addition, the pole 3 may be protruded into the recessed portion 4 from the through hole of the bushing.
A fitting hole 5c formed in the mounting portion 5b of the terminal 5 is fitted into the upper end portion of the pole column 3 protruding into the recessed portion 4, and the upper end portion of the pole column 3 and the mounting portion 5b of the terminal 5 are connected. For example, a sealing agent 6 such as an epoxy resin is filled in the recessed portion 4 which is joined by welding and accommodates the upper end portion of the pole 3 and the mounting portion 5b of the terminal 5.
以下に説明する実施の形態は、本体が１種類の鉛蓄電池に対して予め準備される形状の異なる端子が２種類の場合についてである。
形状の異なる２種類の端子の一つは、例えば、図２（Ａ）に示すように、嵌合穴５ｃを設けた基部から両側縁が平行に延びる取付部５ｂを断面Ｌ字形に上方へ折り曲げた形状の平板端子５ａである。
他の一つは、図２（Ｂ）に示すように、嵌合穴５ｃを設けた基部から先に向かって両側縁間隔が狭くなるように延びる取付部５ｂに円柱又は円錐台を立設した柱状端子５ａ’である。
Embodiment described below is about the case where a main body prepares beforehand with respect to one type of lead acid battery, and there are two types of terminals having different shapes.
For example, as shown in FIG. 2 (A), one of the two types of terminals having different shapes is formed by bending upward a mounting portion 5b having both side edges extending in parallel from a base portion provided with a fitting hole 5c into an L-shaped cross section. This is a flat-plate terminal 5a having a different shape.
The other is, as shown in FIG. 2B, a column or a truncated cone is erected on the mounting portion 5b extending from the base portion where the fitting hole 5c is provided so that the distance between the side edges decreases. This is a columnar terminal 5a ′.
１種類の鉛蓄電池に対し、用途に応じて、上記端子５ａを装着する場合と、端子５ａ’を装着する場合がある。
図１（Ａ）に示すように、極柱３の上端部と端子５ａの取付部５ｂに形成された嵌合穴５ｃとが嵌合し、端子５ａが所定位置にあるときには、凹陥部４内に配置された第１部材８ａが端子５ａの取付部５ｂの外縁に当接する。従って、第１部材８ａは、端子５ａが極柱３を軸として一方向側へ回動することを制止することができ、これによって、極柱３の上端部に取付部５ｂの嵌合穴５ｃを嵌合したときに、端子５ａの位置決めをすることが可能となる。第１部材８ａは、取付部５ｂを挟んで反対側の位置にも配置されてよく、この場合は、端子５ａが極柱３を軸として両方向へ回動することを制止することができる。
端子５ａに代えて端子５ａ’を用いる場合は、図１（Ｂ）に示すように、極柱３の上端部と端子５ｂの取付部５ｂに形成された嵌合穴５ｃとが嵌合し、端子５ａ’が所定位置にあるときには、凹陥部４内に配置された第２部材８ｂが端子５ａ’の外縁に当接する。すなわち、第２部材８ｂの配置は、第１部材８ａの配置より、取付部５ｂの両側縁間の中央寄りとなっている。従って、第２部材８ｂは、端子５ａ’が極柱３を軸として一方向側へ回動することを制止することができ、これによって、極柱３の上端部に取付部５ｂの嵌合穴５ｃを嵌合したときに、端子５ａ’の位置決めをすることが可能となる。第２部材８ｂは、取付部６を挟んで反対側の位置にも配置されてよく、この場合は、端子５ａ’が極柱３を軸として両方向へ回動することを制止することができる。
位置決め部材８は、上記の第１部材８ａと第２部材８ｂとで構成され、凹陥部４内に配置されており、本体が１種類の鉛蓄電池に対して予め準備される形状の異なる２種類の端子５ａと５ａ’のいずれを適用する場合にも対応可能となっている。
Depending on the application, one type of lead-acid battery may be equipped with the terminal 5a or the terminal 5a ′.
As shown in FIG. 1A, when the upper end portion of the pole column 3 and the fitting hole 5c formed in the mounting portion 5b of the terminal 5a are fitted, and the terminal 5a is in a predetermined position, the inside of the recessed portion 4 The first member 8a disposed in contact with the outer edge of the mounting portion 5b of the terminal 5a. Accordingly, the first member 8a can prevent the terminal 5a from rotating in one direction around the pole column 3 as an axis, and thereby the fitting hole 5c of the mounting portion 5b can be formed at the upper end of the pole column 3. It becomes possible to position the terminal 5a when the two are fitted. The 1st member 8a may be arrange | positioned also in the position on the opposite side on both sides of the attachment part 5b. In this case, it can stop that the terminal 5a rotates to both directions centering on the pole 3.
When the terminal 5a ′ is used instead of the terminal 5a, as shown in FIG. 1B, the upper end portion of the pole column 3 and the fitting hole 5c formed in the mounting portion 5b of the terminal 5b are fitted, When the terminal 5a ′ is in a predetermined position, the second member 8b disposed in the recessed portion 4 contacts the outer edge of the terminal 5a ′. That is, the arrangement of the second member 8b is closer to the center between both side edges of the mounting portion 5b than the arrangement of the first member 8a. Therefore, the second member 8b can prevent the terminal 5a 'from rotating in one direction around the pole 3 as an axis, and thereby, the fitting hole of the mounting portion 5b on the upper end of the pole 3 can be prevented. When the 5c is fitted, the terminal 5a 'can be positioned. The 2nd member 8b may be arrange | positioned also in the position on the opposite side on both sides of the attachment part 6, and can prevent that terminal 5a 'rotates to both directions centering on the pole 3 in this case.
The positioning member 8 is composed of the first member 8a and the second member 8b described above, and is disposed in the recessed portion 4, and the body is prepared in advance for two types of lead storage batteries having different shapes. It is possible to cope with any of the terminals 5a and 5a ′.
上記の位置決め部材８は、第１部材８ａと第２部材８ｂを相互に繋げて構成することが好ましく、本発明の実施の形態では第１部材８ａと第２部材８ｂとが鉤型形状を構成している。そして、位置決め部材８が、取付部５ｂを挟んで対称に配置されている。第１部材８ａと第２部材８ｂを相互に繋げて鉤型形状に構成することにより、凹陥部内に配置された置決め部材８の強度は、第１部材８aと第２部材８bとが個々に独立して配置されている場合より大きくすることができる。上記実施の形態で説明した端子５ａ’は、円柱又は円錐台形状の代わりに平板形状であってもよい。 The positioning member 8 is preferably configured by connecting the first member 8a and the second member 8b to each other. In the embodiment of the present invention, the first member 8a and the second member 8b form a bowl shape. doing. And the positioning member 8 is arrange | positioned symmetrically on both sides of the attaching part 5b. By connecting the first member 8a and the second member 8b to each other and forming a saddle shape, the strength of the positioning member 8 disposed in the recessed portion is such that the first member 8a and the second member 8b individually It can be made larger than when they are arranged independently. The terminal 5a 'described in the above embodiment may have a flat plate shape instead of a cylindrical shape or a truncated cone shape.
１ 蓋体
２ 貫通穴
３ 極柱
４ 凹陥部
５ 端子
５ａ 平板端子
５ａ’ 柱状端子
５ｂ 取付部
５ｃ 嵌合穴
６ 封口剤
７、７’ 突起部
８ 位置決め部材
８ａ 第１部材
８ｂ 第２部材
DESCRIPTION OF SYMBOLS 1 Cover body 2 Through-hole 3 Polar pillar 4 Recessed part 5 Terminal 5a Flat plate terminal 5a 'Columnar terminal 5b Mounting part 5c Fitting hole 6 Sealing agent 7, 7' Protrusion part 8 Positioning member 8a 1st member 8b 2nd member
Claims (3)
前記鉛蓄電池に対して形状の異なる複数種類の端子が予め準備され、
前記凹陥部内には、極柱の上端部と端子の取付部に形成された嵌合穴とが嵌合して端子が所定位置にあるときに、端子の外縁に当接することにより前記極柱を軸とする端子の少なくとも一方向への回動を制止する位置決め部材が前記複数種類の端子の形状のそれぞれに対応して設けられており、
前記予め準備される端子は、前記嵌合穴を設けた基部から両側縁が平行に延びる取付部を断面Ｌ字形に上方へ折り曲げた形状の平板端子と、前記嵌合穴を設けた基部から先に向かって両側縁間隔が狭くなるように延びる取付部に立設した円柱又は円錐台形状の柱状端子の２種類であり、前記位置決め部材が、前記平行に延びる両側縁の少なくとも一方に当接する第１部材と、前記第１部材より両側縁間の中央寄りで前記間隔が狭くなるように延びる両側縁の少なくとも一方に当接する第２部材であることを特徴とする鉛蓄電池。 The fitting hole formed in the terminal mounting portion is fitted to the upper end portion of the pole pole that is inserted into the through hole provided in the lid of the battery case and protrudes into the recessed portion that opens in the upper surface of the lid, In the lead storage battery in which the upper end portion of the pole column and the attachment portion of the terminal are joined, and the sealing portion is filled in the recessed portion in which the upper end portion of the pole column and the attachment portion of the terminal are accommodated,
Plural types of terminals having different shapes for the lead storage battery are prepared in advance,
In the recessed portion, when the upper end portion of the pole column and the fitting hole formed in the mounting portion of the terminal are fitted and the terminal is in a predetermined position, the pole column is brought into contact with the outer edge of the terminal. A positioning member for stopping the rotation of the terminal serving as the shaft in at least one direction is provided corresponding to each of the plurality of types of terminals ,
The pre-prepared terminal includes a flat plate terminal having a shape in which an attachment portion extending in parallel on both side edges from the base portion provided with the fitting hole is bent upward in an L-shaped cross section, and the base portion provided with the fitting hole. A cylindrical terminal or a truncated cone-shaped columnar terminal erected on the mounting portion extending so that the distance between both side edges becomes narrower toward the first side, and the positioning member is in contact with at least one of the side edges extending in parallel. A lead-acid battery comprising: one member; and a second member that is in contact with at least one of both side edges extending so as to be narrower toward the center between both side edges than the first member .
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| JP2012136280A JP5995065B2 (en) | 2012-06-15 | 2012-06-15 | Lead acid battery |
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| JP6012102B2 (en) * | 2012-10-26 | 2016-10-25 | 古河電池株式会社 | Lead-acid battery lid |
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