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JP2004055250A - Manufacturing method of assembled battery - Google Patents

Manufacturing method of assembled battery Download PDF

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Publication number
JP2004055250A
JP2004055250A JP2002209211A JP2002209211A JP2004055250A JP 2004055250 A JP2004055250 A JP 2004055250A JP 2002209211 A JP2002209211 A JP 2002209211A JP 2002209211 A JP2002209211 A JP 2002209211A JP 2004055250 A JP2004055250 A JP 2004055250A
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Japan
Prior art keywords
terminal
battery
storage battery
connection body
hole
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JP2002209211A
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Japanese (ja)
Inventor
Toshimichi Nakamura
中村  利通
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Japan Storage Battery Co Ltd
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Japan Storage Battery Co Ltd
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Priority to JP2002209211A priority Critical patent/JP2004055250A/en
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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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Abstract

【課題】蓄電池の端子と接続体とを溶接(ハンダ付け)する際に、より簡便かつ正確で安全とするための組電池の製造方法を提供する。
【解決手段】蓄電池端子と接続体とを溶接によって接続する組電池の製造方法において、前記蓄電池端子に突体を設けるとともに、前記接続体には前記突体と嵌合する孔を設け、前記突体に前記接続体の孔を嵌合させた後に前記嵌合部を溶接することを特徴とする組電池の製造方法。
【選択図】 図1
An object of the present invention is to provide a method of manufacturing an assembled battery to make it easier, more accurate and safer when welding (soldering) a terminal of a storage battery and a connector.
In a method of manufacturing an assembled battery in which a storage battery terminal and a connection body are connected by welding, a projection is provided on the storage battery terminal, and the connection body is provided with a hole that fits the projection, A method for manufacturing an assembled battery, comprising: fitting a hole of the connection body to a body, and then welding the fitting portion.
[Selection diagram] Fig. 1

Description

【0001】
【発明の属する技術分野】
本発明は組電池の製造方法に関する。
【0002】
【従来の技術】
近年、環境に対する配慮が高まり、自動車においてもハイブリッド自動車と称される、通常走行時には従来のガソリンエンジンをする一方、発進時や加速時には電気モータによって推力を補助する自動車が普及している。
【0003】
これらのハイブリッド自動車に使用される蓄電池は、従来の自動車に使用されるSLI用蓄電池とは異なった構造であるとともに、異なった方法で使用される。SLI用蓄電池のSLIとはスタート、ライト、イグニションの頭文字をとったもので、スタート時にエンジンのセルモータを回転させる用途、ライトのような車載電装品に電力を供給する用途、エンジンのプラグに点火(イグナイト)する用途に使用されることを示す。SLI用蓄電池にはスタート時のセルモータの回転に大電流を要するので、内部抵抗が小さく大電流放電が可能であることと、エンジンの停止時においても車載電槽品の電源として使用されるために所定量の放電容量を備えることが必要である。
【0004】
これに対してハイブリッド自動車に使用される蓄電池は、電装品に電力を供給する必要がないので、その放電容量はSLI用蓄電池に比べて少なくてもかまわないが、発進時や加速時における瞬時の電気モータの負荷に対して充分な電力を供給する必要があるのでSLI用蓄電池以上に内部抵抗が小さく、SLI用蓄電池以上に大電流放電が可能であることが要求される。また、通常12Vまたは24VであるSLI用蓄電池よりも組電池としての電圧が高い場合が多い。この他、ブレーキ時に発生する大電流を効率よく受け入れる能力等も要求される。
【0005】
このようなハイブリッド自動車用の蓄電池においては、前述の要求を満たす巻回型発電要素を備えた蓄電池の使用が好ましく、コスト面からはその単価の安い鉛蓄電池の使用が好適である。
【0006】
ところが、巻回型発電要素を備えた鉛蓄電池を、ハイブリッド自動車に使用されるような電圧の高い組電池とするには、SLI用蓄電池として多用される角形の蓄電池に比べて困難であることが多い。SLI用角形蓄電池は、モノブロック電池と称される、複数の発電要素を隔壁を備えた電槽に挿入し、隔壁を介してそれらの発電要素同士を接続する構成であるが、巻回型発電要素を備えた円筒形蓄電池をモノブロック電池とする技術については未だ確立した技術が存在せず、特開平1−243380号公報に記載のように、複数の巻回型発電要素を隔壁を備えた電槽に挿入し、巻回型発電要素の集電耳を一体化させる(ストラップを形成する)と同時にそのストラップ同士を隣接するセル間で接続するキャストオンストラップ法が提案されている程度である。この特開平1−243380号公報の方法は優れた方法であるが、製造設備1つに対して1つの機種の組電池しか製造することができず、要求される組電池電圧の多様化に対し、設備に多額の投資が必要であるとの問題点を有する。
【0007】
上述のような理由から、巻回型発電要素を備える鉛蓄電池においては単電池を製造した後に、それら単電池の端子と接続体とを接続して組電池とすることが一般的におこなわれている。このような接続方法の例として、図5(A)に示すように蓄電池51の端子52をボルト状とし、その端子52に嵌合する孔を備えた接続体53をボルト状端子52に嵌合させ、ナット54を使用して締結するという方法がある。しかしこの方法は、図5(A)の円部の拡大断面図である図5(B)のように、接続体53とボルト状の端子52とが、ナット54を介してしか接触しないために、ナット部の接触抵抗が大きくなる場合があった。
【0008】
この他、図6に示すような特開平9−265975号公報に記載の方法や図7に示すような特開平9−190811号公報に記載の方法が提案されている。図6記載の方法を以下に述べる。第1の蓄電池11の端子12と第2の蓄電池13の端子14はそれぞれボルト状になっており、そのボルト状の端子12、14にアダプタ20を螺着する。アダプタ20はその内側21が端子12、14に螺着できるナット状になっており、その外部には頂部22と係合溝23が備えられる。このアダプタ20に係合することのできる接続体30を取り付けて端子間の接続をするに際して、接続体30は接続部31と連結部32とから構成され、接続部31の内側は、アダプタ20の外部と接触する壁面33が設けられるとともに、アダプタ20の係合溝23に嵌合する係合突起34が設けられる。
【0009】
図7に記載の方法を以下にのべる。この蓄電池端子間接続体1は図示しない蓄電池端子と嵌合する孔2、2とそれら孔2、2を連通する長手の開口部3と開口部3によって設けられた前後壁面4、4’の内側の面5、6を備えるとともに、ボルト9を挿通することのできるボルト孔7を備えたものである。図示しない第1の蓄電池の端子部と図示しない第2の蓄電池の端子部とを接続体1の孔2、2に挿通し、ボルト9とナット10とで締結することによって、図示しない蓄電池端子と接続体とを係止する方法である。
【0010】
これらの方法はいずれの場合もボルトナット等を使用して螺着する部分を備える。このように螺着を使用した組電池をハイブリッド自動車のような移動体に搭載すると、移動時の振動によって螺着が緩む可能性がある。前述のようにハイブリッド自動車に使用されるような高電圧の組電池での螺着が緩むとスパークなどを生じる危険があり、予期せぬ事故を招く恐れがある。
【0011】
このため、ハイブリッド自動車に使用される円筒形鉛蓄電池を組電池にする際の接続には溶接が最も好ましい方法であるといえる。通常電圧特性を重視する鉛蓄電池においては、発電要素から端子に至る電流経路が最も短くなるように、図8に断面を示すようなテーパー端子と称される端子が使用されることが一般的である。テーパー端子とはブッシング61と称される、極柱65を挿通することのできる孔62を備えた鉛合金製部材を樹脂製蓄電池蓋63にインサート成型し、図示しない発電要素のストラップ64から伸びる極柱65を備えた発電要素を電槽に挿入した後、蓄電池蓋31を取り付けることによって極柱65をブッシング61の孔62に挿通し、図9に断面を示すようにブッシング61の上部と極柱65の上部とを相互に溶接することによって得られる端子である。このテーパー端子と接続体とを接続するに際しては、前述の通りボルトナットを使用する方法や、メガネ接桿と称される図10(A)〜(C)に示した鉛合金製部材72、73a、73bから構成される接続部材を使用する方法がある。メガネ接桿は蓄電池70a、70bのテーパー端子71a、71bに嵌合するリング部73a、73bとそれらリング部73a、73bを相互に接続する接続部分72とから構成され、図10(B)に示すようにリング部73a、73bをテーパー端子71a、71bに嵌合させた後、(C)に示すようにテーパー端子71a、71bとリング部73a、73bの両者を溶接するものである。
【0012】
メガネ接桿は鉛合金製であるためにその抵抗が他の金属に比べて比較的大きいとともに重量が重く、ハイブリッド自動車用の組電池としたときに接続抵抗が大きくなる点と組電池重量が重くなるという点で不利益がある。また、メガネ接桿の溶接には熟練した作業者が必要という問題もある。そのために銅などの抵抗の小さな板状の金属を、端子との接触面ができるだけ大きくなるように、例えば図11に側面図を示すように溶接することが抵抗面でも重量面でも優れた方法であるといえると同時に、作業者に特別の熟練を要しないという利点もある。図11の75は接続体を示し、74は溶接用のハンダ等の低融点金属を示す。
【0013】
【発明が解決しようとする課題】
しかし、図11に示したようにブッシング61と極柱65との溶接によって略平面状(溶融した鉛合金の表面張力によって実際は少し丸みをおびたドーム状)となったテーパー端子71a、71bの上面と接続体75とをハンダ74にて溶接する場合には、その溶接前に接続体75テーパー端子71a、71bの上面に固定しておく手段がないため、接続体75を何らかの方法で固定しながら溶接(ハンダ付け)する必要がある。すなわち人手で作業する場合には、片手で接続体75を押さえながらもう一方の手でハンダゴテを操作する必要があるといった不便さが生じる。
【0014】
充電済みの電池を上記方法で組電池とする場合、万一接続体を落下させたりすると、端子間の短絡を引き起こし非常に危険な場合がある。
【0015】
本発明は上記課題を解決するためになされたものであり、蓄電池の端子と接続体とを溶接(ハンダ付け)する際に、より簡便かつ正確で安全とするための組電池の製造方法を提供するものである。
【0016】
【課題を解決するための手段】
上記課題を解決するためになした発明は、蓄電池端子と接続体とを溶接によって接続する組電池の製造方法において、前記蓄電池端子に突体を設けるとともに、前記接続体には前記突体と嵌合する孔を設け、前記突体に前記接続体の孔を嵌合させた後に前記嵌合部を溶接することを特徴とする組電池の製造方法である。
【0017】
【発明の実施の形態】
本発明の実施例を図1に示す。図1は断面図であり、蓄電池70aの端子71aの上面に、接続体75に設けた孔82に嵌合する突起81を設けることが本発明の特徴である。この突起81を設ける方法としては図2(A)に示すように、蓄電池70aのテーパー端子71aに、ステンレスなどの鉛合金よりも融点の高い金属製のキャップ状部材83でありその頂部に突起81を形成するための孔84を設けたものをかぶせ、孔84に足し鉛をおこなうことによって、図2(B)に示すような突起81を形成することが可能である。この他、ブッシング61の上面にあらかじめ突起81aを設けておくこと(図3(A)参照)も、ブッシング61の側面にブッシング61の上面より突出する突起81bをあらかじめ設けておくこと(図3(B)参照)も可能である。しかしこの場合、ブッシング61と極柱65との溶接に特別な治具を使用する必要があったり、溶接用バーナーのノズル形状を検討したりする必要がある。また、これらの場合、突起81をテーパー端子71aの中央に配置することができないため、蓄電池の配置によって後述する接続体75の孔82の配置を各種変更する必要が生じる頻度が多くなる。
【0018】
接続体75は銅などの電気抵抗の小さな金属を使用することが望ましく、テーパー端子71aと接触する部分は溶接(ハンダ付け)の利便性を考慮して薄い板状とすることが好ましいが、テーパー端子71aと接触しない部分は電気抵抗を小さくするためにその断面積を大きくすることもできる。
【0019】
また接続体75とテーパー端子71aとの溶接(ハンダ付け)を容易にするために、接続体75には事前にハンダメッキ(溶融ハンダ浴への浸漬も可)を施しておくことが望ましい。但し、この場合、接続体75の孔82の大きさによって孔82がハンダメッキによって塞がれる場合もあるので、必要に応じて接続体75のハンダメッキの後に孔82を設ける加工をしてもよい。
【0020】
テーパー端子71aについても、突起81を覆わない程度に事前に予備ハンダを施し、この状態で前述したハンダメッキを施した、孔82を備えた接続体75を、突起81と孔82とを嵌合させて配する。この嵌合によってテーパー端子71aと接続体75とは安定して配置され、特別に固定しておく必要がなくなる。この状態で接続体75のテーパー端子71aの上面に接する部分の上側から加熱したハンダゴテを押圧すると、接続体75に施したハンダと、テーパー端子71aに施した予備ハンダとが相互に溶融して溶接される。
【0021】
ここで、突起81については端子上面に設けた場合について述べてきたが、突起81の位置は端子上面に限らず側面でもよい。この場合は図3に示したものと同様に、事前にブッシング61の側面に突起81を備えたものを使用することができる。
【0022】
なお、上記実施の形態においてはテーパー端子を使用した鉛蓄電池について述べたが、端子の形状はテーパー端子に限定されるものではなく、事前に突起81cを設けた図4に示すようなブッシング61aを使用したものにも適用が可能である。さらに上記説明では単電池を組電池にする場合について述べたが、同様にモノブロック電池を組み合わせた組電池とする場合にも本願発明の適用が可能である。この他、上述では巻回型発電要素を備えた円筒形鉛蓄電池について説明したが巻回型発電要素にも円筒形にも限定されることなく、従来の角形の鉛蓄電池にも適用が可能であるし、本願発明と同様のことが実施可能であれば、鉛蓄電池にも限定されるものではない。
【0023】
【実施例】
本願発明に使用した鉛蓄電池は、一対の蓄電池端子(テーパー端子)を含む総高さが180mm、その直径が60mmの巻回型発電要素を備えた円筒形鉛蓄電池であり、テーパー端子の形状はその下面の直径が12mm、上面の直径が10mmの略円錐台形状である。テーパー端子の合金組成は鉛−3wt%錫合金である。
【0024】
第1群の蓄電池として、図2に示した方法で、テーパー端子の中央に高さ1mm、直径1.5mmのテーパー端子と同じ合金組成の円柱状突起81を足し鉛によって設けたものを複数個製作した。ここでキャップ状部材83の材質は軟鋼とし、キャップ状部材の底部の厚みは突起81の高さと同じ1.5mmである。なお、キャップ状部材83は、その大径の開口部がテーパー端子の下面と同じ12mmとし、その内面の深さをテーパー端子と同じにすることによって円柱状突起81を設ける際にズレを生じないようにした。
【0025】
次に第2群の蓄電池として、従来のようにテーパー端子上面に突起81を備えないものを複数個製作した。
【0026】
第1群の蓄電池と第2群の蓄電池とをそれぞれ18個用意し、3×6に配してから厚さ2mmの銅製の板状接続体をテーパー端子に載せてハンダ付けを実施した。銅製の板状接続体は溶融ハンダ浴に浸漬して事前にハンダメッキを施したものであり、第1群の蓄電池に使用したものはハンダメッキ後にテーパー端子の円柱状突起81に嵌合する孔82をドリルを使用して開口した。
【0027】
組電池の製造に際しては、人手によってハンダ付けを実施した。作業者は無作為に20名を選抜し、第1群の蓄電池を用いた組電池と、第2群の蓄電池を用いた組電池を、それぞれ20個(20組)組み立てた。円柱状突起81を備えた第1群の蓄電池を用いた組電池の製造時間は、突起81を備えない第2群の蓄電池を用いた組電池の製造時間に比べて平均約4割の製造時間の短縮が可能となった。また、第2群の蓄電池を組電池とする際は、ダミー電池(発電能力のない電池)を使用したが、第2群の蓄電池を組電池にする際には端子間の短絡を引き起こす可能性のある作業ミス(接続体の落下)が、全作業者において少なくとも1回は認められたのに対し、第1群の蓄電池を組電池とする際にはそのような作業ミスはほとんど認められなかった。
【0028】
【発明の効果】
本発明により、蓄電池の端子と接続体とを溶接(ハンダ付け)する際に、より簡便かつ正確で安全とするための組電池の製造方法を提供するものである。
【図面の簡単な説明】
【図1】実施例
【図2】実施例
【図3】実施例
【図4】実施例
【図5】ボルト端子を備えた従来例
【図6】ボルト端子を備えた従来例
【図7】従来例
【図8】ブッシングと極柱(溶接前)
【図9】ブッシングと極柱(溶接後)
【図10】従来例
【図11】従来例
【符号の説明】
1   接続体
2   蓄電池端子と嵌合する孔
3   孔を連通する長手の開口部
4   前壁面
4’  後壁面
5   前後壁面の内側の面
6   前後壁面の内側の面
7   ボルト孔
9   ボルト
10  ナット
11  第1の蓄電池
12  第1の蓄電池のボルト状端子
13  第2の蓄電池
14  第2の蓄電池のボルト状端子
20  アダプタ
21  アダプタの内側
22  頂部
23  係合溝
30  接続体
31  接続部
32  連結部
33  壁面
34  係合突起
51  蓄電池
52  ボルト状端子
53  接続体
54  ナット
61  ブッシング
61a ブッシング
62  ブッシングの孔
63  蓄電池蓋
64  ストラップ
65  極柱
70a 蓄電池
70b 蓄電池
71a テーパー端子
71b テーパー端子
72  メガネ接桿の接続部
73a メガネ接桿のリング状部
73b メガネ接桿のリング状部
74  溶接(ハンダ付け)部
75  接続体
81  突起
81a 突起
81b 突起
81c 突起
82  接続体の孔
83  突起形成用キャップ状部材
84  突起形成用キャップ状部材の孔
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a battery pack.
[0002]
[Prior art]
2. Description of the Related Art In recent years, environmental considerations have increased, and vehicles that use a conventional gasoline engine during normal running, which is also called a hybrid vehicle, and that assists thrust with an electric motor at the time of starting or accelerating have become widespread.
[0003]
The storage batteries used in these hybrid vehicles have a different structure from the SLI storage batteries used in conventional vehicles, and are used in a different manner. The SLI of the SLI storage battery is an acronym for start, light, and ignition. It is used to rotate the starter motor of the engine at the time of start, to supply power to vehicle-mounted electrical components such as lights, and to ignite the engine plug. (Ignite) is used for applications. Since the SLI storage battery requires a large current for the rotation of the starter motor at the start, the internal resistance is small and a large current discharge is possible, and the SLI storage battery is used as a power source for the onboard battery case even when the engine is stopped. It is necessary to provide a predetermined amount of discharge capacity.
[0004]
On the other hand, storage batteries used in hybrid vehicles do not need to supply power to electrical components, so their discharge capacity may be smaller than that of SLI storage batteries. Since it is necessary to supply sufficient electric power to the load of the electric motor, it is required that the internal resistance is smaller than that of the SLI storage battery and that a larger current discharge is possible than that of the SLI storage battery. Also, the voltage of the assembled battery is often higher than that of the SLI storage battery which is usually 12V or 24V. In addition, the ability to efficiently receive a large current generated during braking is required.
[0005]
In such a storage battery for a hybrid vehicle, it is preferable to use a storage battery provided with a wound-type power generation element that satisfies the above-mentioned requirements, and in terms of cost, it is preferable to use a lead storage battery with a low unit price.
[0006]
However, it is more difficult to use a lead-acid battery having a wound-type power generating element as a battery pack having a high voltage as used in a hybrid vehicle, as compared with a rectangular battery that is frequently used as an SLI battery. Many. The prismatic storage battery for SLI has a configuration called a monoblock battery, in which a plurality of power generating elements are inserted into a battery case having a partition and the power generating elements are connected to each other through the partition. No technology has yet been established as to the technology for making a cylindrical storage battery having elements into a monoblock battery. As described in Japanese Patent Application Laid-Open No. 1-243380, a plurality of wound-type power generating elements are provided with partition walls. A cast-on strap method has been proposed in which the current collecting ears of the wound power generating element are integrated into a battery case to form a strap (forming a strap), and the straps are connected between adjacent cells. . Although the method disclosed in Japanese Patent Application Laid-Open No. 1-243380 is an excellent method, only one type of assembled battery can be manufactured for one manufacturing facility. However, there is a problem that a large investment is required for the equipment.
[0007]
For the reasons described above, in a lead-acid battery provided with a wound-type power generating element, it is common practice to manufacture the cells and then connect the terminals of the cells and the connecting body to form an assembled battery. I have. As an example of such a connection method, as shown in FIG. 5A, a terminal 52 of a storage battery 51 is formed in a bolt shape, and a connection body 53 having a hole for fitting the terminal 52 is fitted in the bolt-shaped terminal 52. Then, there is a method of fastening using a nut 54. However, in this method, as shown in FIG. 5B, which is an enlarged cross-sectional view of the circular portion in FIG. 5A, the connection body 53 and the bolt-shaped terminal 52 come into contact only through the nut 54. In some cases, the contact resistance of the nut portion was increased.
[0008]
In addition, a method described in JP-A-9-265975 as shown in FIG. 6 and a method described in JP-A-9-190811 as shown in FIG. 7 have been proposed. The method shown in FIG. 6 will be described below. The terminal 12 of the first storage battery 11 and the terminal 14 of the second storage battery 13 each have a bolt shape, and the adapter 20 is screwed to the bolt-shaped terminals 12 and 14. The adapter 20 has a nut-like shape whose inside 21 can be screwed to the terminals 12 and 14, and has a top 22 and an engagement groove 23 outside. When a connection body 30 that can be engaged with the adapter 20 is attached to connect the terminals, the connection body 30 is composed of a connection part 31 and a connection part 32, and the inside of the connection part 31 is A wall surface 33 that contacts the outside is provided, and an engagement protrusion 34 that fits into the engagement groove 23 of the adapter 20 is provided.
[0009]
The method described in FIG. 7 is described below. The connection 1 between storage battery terminals is provided with holes 2, 2 to be fitted with a storage battery terminal (not shown), longitudinal openings 3 communicating the holes 2, 2, and inside front and rear wall surfaces 4, 4 ′ provided by the openings 3. And a bolt hole 7 through which a bolt 9 can be inserted. By inserting a terminal portion of a first storage battery (not shown) and a terminal portion of a second storage battery (not shown) into the holes 2 and 2 of the connecting body 1 and fastening them with bolts 9 and nuts 10, This is a method of locking the connection body.
[0010]
In each case, these methods include a portion to be screwed using a bolt and a nut. When the battery pack using the screw is mounted on a moving body such as a hybrid vehicle, the screw may be loosened due to vibration during the movement. As described above, if the screwing of a high-voltage battery pack used in a hybrid vehicle is loosened, a spark or the like may occur, which may cause an unexpected accident.
[0011]
For this reason, it can be said that welding is the most preferable method for connection when a cylindrical lead-acid battery used in a hybrid vehicle is formed into an assembled battery. Normally, in a lead-acid battery emphasizing voltage characteristics, a terminal called a tapered terminal as shown in a cross section in FIG. 8 is generally used so that the current path from the power generation element to the terminal is the shortest. is there. The tapered terminal is a bushing 61, a lead alloy member having a hole 62 through which a pole 65 can be inserted, is insert-molded into a resin battery cover 63, and a pole extending from a strap 64 of a power generation element (not shown). After the power generating element provided with the column 65 is inserted into the battery case, the pole column 65 is inserted into the hole 62 of the bushing 61 by attaching the storage battery lid 31, and the upper portion of the bushing 61 and the pole column are 65 is a terminal obtained by welding the upper part with the upper part of each other. When connecting the tapered terminal and the connection body, as described above, a method using a bolt and a nut or a lead alloy member 72, 73a shown in FIGS. , 73b. The eyeglass connecting rod is composed of ring portions 73a and 73b fitted to the tapered terminals 71a and 71b of the storage batteries 70a and 70b, and a connecting portion 72 for connecting the ring portions 73a and 73b to each other, as shown in FIG. After the ring portions 73a and 73b are fitted to the tapered terminals 71a and 71b, both the tapered terminals 71a and 71b and the ring portions 73a and 73b are welded as shown in FIG.
[0012]
Since the eyeglass connecting rod is made of lead alloy, its resistance is relatively large and heavy compared to other metals, and the connection resistance becomes large when it is used as a battery pack for hybrid vehicles, and the weight of the battery pack is heavy There is a disadvantage in that it becomes. There is also a problem that a skilled worker is required for welding the eyeglass connecting rod. For this purpose, it is preferable to weld a plate-like metal having a small resistance such as copper so that the contact surface with the terminal is as large as possible, for example, as shown in a side view in FIG. At the same time, there is the advantage that no special skill is required for the operator. In FIG. 11, reference numeral 75 denotes a connection body, and reference numeral 74 denotes a low melting point metal such as solder for welding.
[0013]
[Problems to be solved by the invention]
However, as shown in FIG. 11, the upper surfaces of the tapered terminals 71a and 71b which have become substantially planar (actually a slightly rounded dome shape due to the surface tension of the molten lead alloy) by welding the bushing 61 and the pole 65. When the connection body 75 is welded to the connection body 75 with the solder 74, there is no means for fixing the connection body 75 to the upper surfaces of the tapered terminals 71a and 71b before the welding. It is necessary to weld (soldering). In other words, when working manually, there is an inconvenience that it is necessary to operate the soldering iron with the other hand while holding down the connecting body 75 with one hand.
[0014]
In the case where a charged battery is used as a battery pack by the above method, if the connection body is dropped, a short circuit between terminals may be caused, which may be very dangerous.
[0015]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method of manufacturing an assembled battery to make it easier, more accurate, and safer when welding (soldering) a terminal of a storage battery and a connector. Is what you do.
[0016]
[Means for Solving the Problems]
The invention made in order to solve the above-mentioned problem is a method of manufacturing an assembled battery in which a storage battery terminal and a connection body are connected by welding, wherein a projection is provided on the storage battery terminal, and the projection is fitted to the connection body. A method for manufacturing an assembled battery, comprising: providing a fitting hole, fitting the hole of the connection body to the projection, and then welding the fitting portion.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of the present invention. FIG. 1 is a cross-sectional view, and a feature of the present invention is that a projection 81 that fits into a hole 82 provided in a connection body 75 is provided on the upper surface of a terminal 71a of a storage battery 70a. As shown in FIG. 2A, a method for providing the projection 81 is to provide a metal cap-shaped member 83 having a melting point higher than that of a lead alloy such as stainless steel on the tapered terminal 71a of the storage battery 70a. 2B is covered with a member provided with a hole 84 for forming a hole, and lead is added to the hole 84, so that a projection 81 as shown in FIG. 2B can be formed. In addition, the projection 81a may be provided on the upper surface of the bushing 61 in advance (see FIG. 3A), or the projection 81b protruding from the upper surface of the bushing 61 may be provided on the side surface of the bushing 61 in advance (see FIG. B) is also possible. However, in this case, it is necessary to use a special jig for welding the bushing 61 and the pole 65, or to examine the nozzle shape of the welding burner. In these cases, since the projection 81 cannot be arranged at the center of the tapered terminal 71a, it is necessary to frequently change the arrangement of the hole 82 of the connector 75 described later depending on the arrangement of the storage battery.
[0018]
The connection body 75 is desirably made of a metal having a small electric resistance such as copper, and the portion in contact with the tapered terminal 71a is preferably formed in a thin plate shape in consideration of the convenience of welding (soldering). The portion not in contact with the terminal 71a may have a larger sectional area in order to reduce the electric resistance.
[0019]
In addition, in order to facilitate welding (soldering) between the connection body 75 and the tapered terminal 71a, it is desirable that the connection body 75 be subjected to solder plating (or immersion in a molten solder bath) in advance. However, in this case, the hole 82 may be closed by solder plating depending on the size of the hole 82 of the connection body 75. Therefore, if necessary, the hole 82 may be provided after the solder plating of the connection body 75. Good.
[0020]
The tapered terminal 71a is also preliminarily soldered so as not to cover the projection 81, and in this state, the connection body 75 having the hole 82, which has been subjected to the solder plating described above, is fitted with the projection 81 and the hole 82. Let it be arranged. By this fitting, the tapered terminal 71a and the connection body 75 are stably arranged, and it is not necessary to fix them specially. In this state, when the heated soldering iron is pressed from above the portion in contact with the upper surface of the tapered terminal 71a of the connection body 75, the solder applied to the connection body 75 and the preliminary solder applied to the tapered terminal 71a are mutually fused and welded. Is done.
[0021]
Here, the case where the protrusion 81 is provided on the upper surface of the terminal has been described, but the position of the protrusion 81 is not limited to the upper surface of the terminal but may be the side surface. In this case, similarly to the one shown in FIG. 3, a bushing 61 having a projection 81 on the side surface can be used in advance.
[0022]
In the above-described embodiment, the lead storage battery using the tapered terminal has been described. However, the shape of the terminal is not limited to the tapered terminal, and the bushing 61a as shown in FIG. It can be applied to the used one. Further, in the above description, the case where the unit cell is an assembled battery has been described, but the present invention can be similarly applied to the case where the assembled battery is a combination of monoblock batteries. In addition, in the above description, a cylindrical lead-acid battery having a wound power generating element has been described. However, the present invention is not limited to a wound-type power generating element nor a cylindrical shape, and can be applied to a conventional rectangular lead-acid battery. The present invention is not limited to a lead storage battery as long as the same operation as the present invention can be performed.
[0023]
【Example】
The lead storage battery used in the present invention is a cylindrical lead storage battery having a wound power generating element having a total height of 180 mm including a pair of storage battery terminals (taper terminals) and a diameter of 60 mm. It has a substantially truncated cone shape with a lower surface having a diameter of 12 mm and an upper surface having a diameter of 10 mm. The alloy composition of the tapered terminal is a lead-3 wt% tin alloy.
[0024]
As the first group of storage batteries, a plurality of storage batteries provided with lead by adding a columnar projection 81 having the same alloy composition as a tapered terminal having a height of 1 mm and a diameter of 1.5 mm at the center of the tapered terminal by the method shown in FIG. Made. Here, the material of the cap-shaped member 83 is mild steel, and the thickness of the bottom of the cap-shaped member is 1.5 mm, which is the same as the height of the projection 81. Note that the cap-shaped member 83 has a large-diameter opening that is the same as the lower surface of the tapered terminal, that is, 12 mm, and the inner surface has the same depth as the tapered terminal, so that no displacement occurs when the columnar projection 81 is provided. I did it.
[0025]
Next, as the second group of storage batteries, a plurality of storage batteries having no projection 81 on the upper surface of the tapered terminal as in the related art were manufactured.
[0026]
Eighteen of the first group of storage batteries and the second group of storage batteries were prepared, arranged in 3 × 6, and then a copper plate-like connector having a thickness of 2 mm was placed on a tapered terminal and soldered. The copper plate-like connection body is one which is immersed in a molten solder bath and subjected to solder plating in advance, and the one used for the first group of storage batteries is a hole which fits into the cylindrical projection 81 of the tapered terminal after the solder plating. 82 was opened using a drill.
[0027]
When manufacturing the assembled battery, soldering was performed manually. The workers randomly selected 20 persons, and assembled 20 (20 sets) each of the assembled battery using the first group of storage batteries and the assembled battery using the second group of storage batteries. The manufacturing time of the assembled battery using the first group of storage batteries provided with the columnar projections 81 is about 40% of the average manufacturing time of the assembled battery using the second group of storage batteries not provided with the projections 81. Can be shortened. In addition, when the second group of storage batteries was used as an assembled battery, a dummy battery (a battery having no power generation capability) was used. However, when the second group of storage batteries is used as an assembled battery, there is a possibility that a short circuit between terminals may occur. A certain operation error (dropping of the connected body) was observed at least once in all workers, whereas such an operation error was hardly observed when the first group of storage batteries was used as an assembled battery. Was.
[0028]
【The invention's effect】
According to the present invention, there is provided a method of manufacturing an assembled battery for making it easier, more accurate and safer when welding (soldering) a terminal of a storage battery and a connector.
[Brief description of the drawings]
FIG. 1 is an example [FIG. 2] Example [FIG. 3] Example [FIG. 4] Example [FIG. 5] Conventional example provided with bolt terminals [FIG. 6] Conventional example provided with bolt terminals [FIG. 7] Conventional example [Fig. 8] Bushing and pole (before welding)
FIG. 9: bushing and pole (after welding)
FIG. 10 is a conventional example. FIG. 11 is a conventional example.
DESCRIPTION OF SYMBOLS 1 Connection body 2 Hole which fits a storage battery terminal 3 Long opening 4 which communicates with a hole 4 Front wall 4 'Rear wall 5 Inner surface of front and rear wall 6 Inner surface of front and rear wall 7 Bolt hole 9 Bolt 10 Nut 11 No. 1 storage battery 12 Bolt-shaped terminal 13 of first storage battery 13 Second storage battery 14 Bolt-shaped terminal of second storage battery 20 Adapter 21 Inside of adapter 22 Top 23 Engagement groove 30 Connection body 31 Connection part 32 Connection part 33 Wall surface 34 Engagement projection 51 Storage battery 52 Bolt-shaped terminal 53 Connector 54 Nut 61 Bushing 61a Bushing 62 Bushing hole 63 Battery cover 64 Strap 65 Polar pole 70a Storage battery 70b Storage battery 71a Tapered terminal 71b Tapered terminal 72 Eyeglass connection rod connection portion 73a Glasses connection Rod ring-shaped part 73b Ring-shaped part 74 of eyeglass contact rod Welding (c Hole Da with) portion 75 connector 81 protruding 81a projections 81b projecting 81c projecting 82 connector hole 83 projection forming cap-shaped member 84 projecting forming cap-shaped member

Claims (1)

蓄電池端子と接続体とを溶接によって接続する組電池の製造方法において、
前記蓄電池端子に突体を設けるとともに、前記接続体には前記突体と嵌合する孔を設け、前記突体に前記接続体の孔を嵌合させた後に前記嵌合部を溶接することを特徴とする組電池の製造方法。
In a method of manufacturing a battery pack for connecting a storage battery terminal and a connection body by welding,
Providing a protrusion on the storage battery terminal, providing a hole for fitting the protrusion in the connection body, and welding the fitting portion after fitting the hole of the connection body in the protrusion. A method for manufacturing an assembled battery.
JP2002209211A 2002-07-18 2002-07-18 Manufacturing method of assembled battery Pending JP2004055250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002209211A JP2004055250A (en) 2002-07-18 2002-07-18 Manufacturing method of assembled battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002209211A JP2004055250A (en) 2002-07-18 2002-07-18 Manufacturing method of assembled battery

Publications (1)

Publication Number Publication Date
JP2004055250A true JP2004055250A (en) 2004-02-19

Family

ID=31933118

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2004055250A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007184248A (en) * 2005-12-29 2007-07-19 Samsung Sdi Co Ltd Secondary battery
JP2010086785A (en) * 2008-09-30 2010-04-15 Toshiba Corp Secondary battery and battery module
JP2011082159A (en) * 2009-10-05 2011-04-21 Sb Limotive Co Ltd Battery module, and terminal connecting method of secondary battery
WO2012043593A1 (en) * 2010-09-30 2012-04-05 三洋電機株式会社 Battery system
JP2012238562A (en) * 2011-05-09 2012-12-06 Sb Limotive Co Ltd Battery module
JP2012243405A (en) * 2011-05-16 2012-12-10 Hitachi Vehicle Energy Ltd Rectangular secondary battery
JP2014510366A (en) * 2011-02-18 2014-04-24 ショット アクチエンゲゼルシャフト Penetration parts

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007184248A (en) * 2005-12-29 2007-07-19 Samsung Sdi Co Ltd Secondary battery
JP2010086785A (en) * 2008-09-30 2010-04-15 Toshiba Corp Secondary battery and battery module
JP2011082159A (en) * 2009-10-05 2011-04-21 Sb Limotive Co Ltd Battery module, and terminal connecting method of secondary battery
CN102034953A (en) * 2009-10-05 2011-04-27 Sb锂摩托有限公司 Battery module and method for connecting terminals of rechargeable batteries of battery module
US8460818B2 (en) 2009-10-05 2013-06-11 Samsung Sdi Co., Ltd. Battery module
WO2012043593A1 (en) * 2010-09-30 2012-04-05 三洋電機株式会社 Battery system
JP2014510366A (en) * 2011-02-18 2014-04-24 ショット アクチエンゲゼルシャフト Penetration parts
JP2012238562A (en) * 2011-05-09 2012-12-06 Sb Limotive Co Ltd Battery module
US9070939B2 (en) 2011-05-09 2015-06-30 Samsung Sdi Co., Ltd. Battery module
JP2012243405A (en) * 2011-05-16 2012-12-10 Hitachi Vehicle Energy Ltd Rectangular secondary battery

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