JP2004047373A - Battery - Google Patents

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Publication number
JP2004047373A
JP2004047373A JP2002205932A JP2002205932A JP2004047373A JP 2004047373 A JP2004047373 A JP 2004047373A JP 2002205932 A JP2002205932 A JP 2002205932A JP 2002205932 A JP2002205932 A JP 2002205932A JP 2004047373 A JP2004047373 A JP 2004047373A
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Japan
Prior art keywords
power generation
battery
generation cell
body portion
view
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JP2002205932A
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Japanese (ja)
Inventor
Seiji Ioka
井岡 誠二
Hiroichi Ishida
石田 博一
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2002205932A priority Critical patent/JP2004047373A/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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  • Connection Of Batteries Or Terminals (AREA)
  • Cell Separators (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery in which the problem of insufficient sticking ability of a power generating cell to an inner surface of a battery case even when a positive terminal or a cathode terminal is short in length. <P>SOLUTION: In the battery, the power generating cell 2 constituted from a first barrel 231 containing the short length positive terminal 21 and the cathode terminal 22 and a second barrel 232 in which the barrel is made narrower by not containing the two terminals are stored in the battery case 1. A compensating resin sheet 5 compensating the narrowness of the barrel of the second barrel 232 is provided on the second barrel 232 and the barrels are covered by a dampproof covering member 3 in that state. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、電池に関し、詳しくは携帯電話、ノート型パソコンなどの各種の携帯型電子機器用として好適な電池、就中、軽量小型の電池に関するものである。
【0002】
【従来の技術】
図12〜図19は、従来の電池の構造を説明するものであって、図12は上記電池を構成する発電セルの展開図、図13は図12のXIII−XIII線に沿った部分断面図、図14は上記発電セルの一例の斜視図、図15は上記発電セルの他の例の斜視図、図16は上記発電セルのさらに他の例の斜視図、図17は被覆部材3で被覆された発電セルの断面図(図15のXVII−XVII線に沿った発電セルの断面図を含む)、図18は図15の発電セルを電池ケース内に収容してなる電池の斜視図、図19は図18のXIX−XIX線に沿った断面図である。
【0003】
図12〜図19において、2は発電セル、21は正極端子、22は負極端子、23は発電セル2の胴部、24は正極シート、25は負極シート、26および27は電気絶縁層として機能するセパレータ、28は電気絶縁テープ、29は電気絶縁性の接着テープである。図12において、負極端子22は、接着性の電気絶縁テープ28により負極シート25の図上での左端近傍上に貼着されており、正極端子21は、セパレータ26と正極シート24との間にあって、電気絶縁テープ28により正極シート24の図上での右端近傍上に貼着されている。図12の状態にある展開物を同図上での右端から左端に向けて捲回し、捲回端を電気絶縁性接着テープ29にて接着することにより図14に示す円柱状の発電セル2が得られる。またこの円柱状発電セルをプレス成型して扁平状とした図15に示す発電セル2や図16に示すエンベロープ型発電セル2などを得ることもできる。
【0004】
図17および図19において、3は発電セル2の上に設けられた被覆部材、1は電池ケース、4は両面粘着固定テープである。被覆部材3は、後記する通り、気密性、防湿性のアルミニウムラミネートフィルムから構成されており、発電セル2は、気密および防湿の目的で被覆部材3により被覆されている。なお図17、図19および後記する図2および図7においては、正極シート24、負極シート25、セパレータ26、およびセパレータ27を含む捲回体の断面は、梨地で示す。被覆部材3により被覆された発電セル2は、半割型あるいはバターカップ型の電池ケース1内に収容され、被覆部材3同士の溶着部の一部を貫通した正極端子21は、電池の正極11に接続されている。図17および図19には示していないが、負極端子22は正極12と同様にして負極12に接続されている。
【0005】
ところで、正極端子21および負極端子22は、近時における電池の軽量小型の要請にしたがって、それら21、22自体を可及的に軽量とするために、図12から明らかなように、それらの長さL1は、正極シート24、負極シート25、およびセパレー26、27の横幅L2よりも短いものとされている。横幅L2は、発電セル2の胴部23の胴長でもある。上記の結果、発電セル2は、図17に示すように、正極端子21および負極端子22を含む第一胴部分231、上記端子21、22を含まないことにより上記第一胴部分231より胴細となっている第二胴部分232、およびその中間の第三胴部分233とから構成されるようになっている。
【0006】
図17において、h1は第一胴部分231の厚みであり、h2は第二胴部分232の厚みであって、それらの差Δhは、主として正極端子21および負極端子22の厚みに基づく。胴部23におけるかかる厚み差が生じるために、発電セル2を両面粘着固定テープ4により電池ケース1の内面に粘着した場合、第一胴部分231は良好に粘着しても、第二胴部分232および第三胴部分233、特に第二胴部分232では差Δh(片側;Δh/2)に基づく間隙G(図19参照)の発生のために粘着力が弱く、あるいは粘着しない問題がある。差Δhのh1に占める割合は、電池セル2が薄型化するに伴い、増大していく。さらに第二胴部分232での粘着力不足のために、第一胴部分231の粘着力も低下する問題がある。発電セル2の電池ケース1の内面への粘着力が弱いと、電池のキー押し強度、耐落下強度などが低下する。
【0007】
【発明が解決しようとする課題】
本発明は、従来技術における如上の現況に鑑み、正極端子や負極端子が短尺ものであっても、発電セルの電池ケースの内面への粘着力不足の問題が解決された電池を提供することを課題とするものである。
【0008】
【課題を解決するための手段】
本発明の請求項1に係る電池は、電極端子を含む第一胴部分と上記電極端子を含まないことにより上記第一胴部分より胴細となっている第二胴部分とから構成された発電セルを電池ケース内に収容した電池であって、上記第二胴部分の胴細を補償する胴細補償部材を上記第二胴部分の上に設けたことを特徴とするものである。
【0009】
本発明の請求項2に係る電池は、請求項1において、上記第二胴部分の胴長は、上記発電セルの胴全長の20〜80%程度であり、上記胴細補償部材は、上記第二胴部分の胴長の少なくとも30%にあたる個所に設けられたことを特徴とするものである。
【0010】
本発明の請求項3に係る電池は、請求項1または請求項2において、上記胴細補償部材は、電気絶縁性シートであることを特徴とするものである。
【0011】
本発明の請求項4に係る電池は、請求項1〜請求項3のいずれか一項において、上記発電セルは、上記第二胴部分に上記胴細補償部材を有する状態で防湿性の被覆部材により被覆されたことを特徴とするものである。
【0012】
【発明の実施の形態】
以下において、前記図12〜図19における部位または表示と同じ部位または表示に就いては同じ符号を付して説明を省略することがある。
【0013】
実施の形態.1
図1〜図11は、本発明の電池における実施の形態1を説明するものであって、図1は実施の形態1の分解斜視図、図2は図1に示された実施の形態1が分解されない状態でのII−II線に沿った断面図、図3は被覆部材で被覆される前の発電セルの斜視図、図4は実施の形態1の中間体、即ち被覆部材で被覆された発電セルの斜視図、図5は図4のV−V線に沿った断面図、図6は図4のVI−VI線に沿った断面図、図7は図4のVII−VII線に沿った断面図、図8は図5の部分拡大断面図、図9〜図11は上記中間体の製造方法を説明する説明図である。図1〜図11において、5は前記胴細補償部材の一例としての補償用樹脂シート、6は上記中間体である。以下、発電セルとして前記図15に示した扁平状の発電セル2を用いた場合について、先ず図3〜図11により中間体6の製造方法並びにその構造につき説明する。
【0014】
図3は、図15の扁平状発電セル2の第二胴部分232の表裏に、換言するとU字状に補償用樹脂シート5を宛がった状態を示す。補償用樹脂シート5の厚みは、第一胴部分231の厚みh1と第二胴部分231の厚みh2の差Δh(前記図17および図19参照)の1/2またはそれに近い厚みのものであって、各種の電気絶縁性樹脂、就中、ポリアミド、ポリイミド、ポリアミドイミド、ポリエステルなどの耐熱性樹脂のシート、例えば商品名カプトンテープなどが用いられる。上記の差Δhを生ぜしめる原因となる正極端子21および負極端子22の厚みは、電池の容量やサイズにより変化するが、一般的には100μm前後であって、かかる端子厚みの場合では、補償用樹脂シート5の厚みは、0.7Δh/2〜1.3Δh/2程度のもの、特に0.8Δh/2〜1.2Δh/2程度のものが好ましい。補償用樹脂シート5は、必ずしも第二胴部分232に接着あるいは粘着する必要はないが、本発明の電池の製造上におけるそれの取り扱いの容易性並びに胴細補償部材としての機能の長期安定性の立場から第二胴部分232に接着あるいは粘着させることが好ましい。
【0015】
図8(b)は、図8(a)におけるC部の拡大図、図9は、被覆部材3の平面図、図10は、発電セル2を被覆部材3により被覆する前における発電セル2と被覆部材3の斜視図である。被覆部材3は、図8 (b)に示す通り、中間のアルミニウムフィルム層31の一方の側に樹脂フィルム層32を、他方の側に樹脂フィルム層33を有する三層構造の気密性防湿性アルミニウムラミネートフィルムから構成されており、図9および図10に示すように境界線TQを中央としてその両側にそれぞれ基部34と蓋部35とを有し、また基部34の略中央に発電セル2が配置される凹部としての深絞り341が形成されている。この深絞り341の周囲の部分が溶着代となる。
【0016】
図10および図11に示すように、蓋部35の上に図3に示す補償用樹脂シート5付きの発電セル2を置き、境界線TQに沿って被覆部材3を折り曲げて発電セル2が深絞り341内に収まるようにする。この折り曲げによって、被覆部材3の辺UTと辺STとが、辺PQと辺RQとが、また辺UPと辺SRとが、それぞれ重なるようにする。その際、発電セル2の正極端子21と負極端子22の各先端部は、辺UPと辺SRとの重なり部を超えて外部に露出するようにしておく。図11は、かかる折り曲げの途中における基部34、深絞り341、蓋部35、発電セル2、正極端子21、およびと負極端子22の状態を示す。
【0017】
つぎに、深絞り341の周囲の溶着代、即ち辺UTと辺ST、辺PQと辺RQ、および辺UPと辺SRの各重なり部およびその周辺を熱圧着して基部34と蓋部35の両樹脂フィルム層32同士を溶着する。かくして被覆部材3にて被覆された発電セル2が得られ、さらに各溶着代の嵩張りを可及的に小さくするために、辺UTと辺STとを含む溶着代部および辺PQと辺RQとを含む溶着代部を図8(a)に示すように二箇所で折り曲げる。かくして図4〜図6に示す実施の形態1の中間体6を得ることができる。
【0018】
つぎに図1および図2により実施の形態1の電池の組み立て方法並びに電池構造を説明する。図1および図2において、1は、上ケース13と下ケース14とから構成された半割型の電池ケース、15は電気絶縁基板の両側に電池の正極11と負極12とを有する電極板、16は保護素子、4は両面粘着固定テープ、6は図4〜図6に示された中間体、即ち被覆部材3で被覆された発電セル2である。中間体6は、下ケース14内に設置され、正極端子21の先端部は電池の正極11に接続され、負極端子22の先端部は電池の負極12に接続される。ついで中間体6の上側の被覆部材3の表面に両面粘着固定テープ4の片面が粘着される。その後、下ケース14の上に上ケース13を被せると同時に両面粘着固定テープ4の残る片面を上ケース13の内壁に粘着させる。かくして図2に示す断面図を有する電池を得ることができる。
【0019】
図2から明らかにように、発電セル2の第二胴部分232上に補償用樹脂シート5を設けることにより第二胴部分232上での補償用樹脂シート5の高さは、第一胴部分231の高さまたはそれに近い高さとなるので、それらを覆う被覆部材3の表面は、上ケース13の内壁と実質的に平行する状態となって、発電セル2は、両面粘着固定テープ4により従来技術と比較して格段に安定的に電池ケースに粘着されることになる。
【0020】
実施の形態1および本発明において、正極端子21や負極端子22など電極端子の長さは、一般的に正極シート24や負極シート25などの電極シートの横幅、換言すると発電セル2の胴部23の胴長の20〜80%程度であり、しかして上記電極端子を含まない第二胴部分232の胴長は、胴部23の胴全長の20〜80%程度である。かかる状態において、補償用樹脂シート5は、第二胴部分232の胴長の少なくとも30%、特に少なくとも50%にあたる個所に設けられることが好ましい。
【0021】
本発明は、前記実施の形態1に限定されるものではなく、本発明が解決しようとする課題、並びにその解決手段の精神に沿った種々の変形形態を包含する。例えば実施の形態1において採用された図15に示す扁平状の発電セルに代えて、図14に示す円柱状のもの、図16に示すエンベロープ型のものであってもよい。また前記胴細補償部材としては、実施の形態1において採用された補償用樹脂シート5に代えて、樹脂以外の材料から形成されたものであってもよい。
【0022】
実施の形態1においては補償用樹脂シート5は、発電セル2と一緒に被覆部材3により被覆されたが、被覆部材3で被覆された発電セル2の被覆部材3の上に設けてもよい。しかし補償用樹脂シート5は、実施の形態1におけるように被覆部材3の中に入れた方が補償用樹脂シート5の位置ずれがなく、電池の性能が安定するので好ましい。
【0023】
【発明の効果】
本発明の請求項1に係る電池は、電極端子を含む第一胴部分と上記電極端子を含まないことにより上記第一胴部分より胴細となっている第二胴部分とから構成された発電セルを電池ケース内に収容した電池であって、上記第二胴部分の胴細を補償する電気絶縁性シートなどの胴細補償部材樹脂シートを上記第二胴部分の上に設けたことを特徴とするものであり、上記第二胴部分の胴長は、例えば上記発電セルの胴全長の20〜80%程度であり、上記胴細補償部材は、例えば上記第二胴部分の胴長の少なくとも30%にあたる個所に設けられたものであるので、前記図19に示したような間隙Gが生じず、この結果、両面粘着固定テープによる発電セルの電池ケースの内面への粘着力が十分で且つ安定するので、電池のキー押し強度、耐落下強度などが向上する顕著な効果がある。
【0024】
また、上記発電セルは、上記第二胴部分に上記胴細補償部材を有する状態で防湿性の被覆部材により被覆されたものであると、上記胴細補償部材の位置ずれがなく、電池の性能が安定する効果がある。
【図面の簡単な説明】
【図1】実施の形態1の分解斜視図。
【図2】図1に示された実施の形態1が分解されない状態でのII−II線に沿った断面図。
【図3】被覆部材で被覆される前の発電セルの斜視図。
【図4】実施の形態1の中間体の斜視図。
【図5】図4のV−V線に沿った断面図。
【図6】図4のVI−VI線に沿った断面図。
【図7】図4のVII−VII線に沿った断面図。
【図8】図5の部分拡大断面図。
【図9】中間体の製造方法を説明する説明図。
【図10】中間体の製造方法を説明する他の説明図。
【図11】中間体の製造方法を説明するさらに他の説明図。
【図12】電池を構成する通常の発電セルの展開図。
【図13】図12のXIII−XIII線に沿った部分断面図。
【図14】通常の発電セルの一例の斜視図。
【図15】通常の発電セルの他の例の斜視図。
【図16】通常の発電セルのさらに他の例の斜視図。
【図17】被覆部材で被覆された通常の発電セルの断面図。
【図18】図15の発電セルを電池ケース内に収容してなる電池の斜視図。
【図19】図18のXIX− XIX線に沿った断面図。
【符号の説明】
1 電池ケース、11 正極、12 負極、13 上ケース、
14 下ケース、2 発電セル、21 正極端子、22 負極端子、
23 発電セルの胴部、231 第一胴部分、232 第二胴部分、
24 正極シート、25 負極シート、26 セパレータ、27 セパレータ、
28 電気絶縁テープ、29 接着テープ、3 被覆部材、
4 両面粘着固定テープ、5 補償用樹脂シート、6 中間体。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery, and more particularly to a battery suitable for various portable electronic devices such as a mobile phone and a notebook personal computer, and more particularly to a lightweight and small battery.
[0002]
[Prior art]
12 to 19 illustrate the structure of a conventional battery. FIG. 12 is a developed view of a power generation cell constituting the battery, and FIG. 13 is a partial cross-sectional view taken along line XIII-XIII in FIG. 14 is a perspective view of an example of the power generation cell, FIG. 15 is a perspective view of another example of the power generation cell, FIG. 16 is a perspective view of another example of the power generation cell, and FIG. FIG. 18 is a cross-sectional view of a power generation cell (including a cross-sectional view of the power generation cell taken along line XVII-XVII in FIG. 15), and FIG. 18 is a perspective view of a battery in which the power generation cell of FIG. 19 is a sectional view taken along the line XIX-XIX in FIG.
[0003]
12 to 19, reference numeral 2 denotes a power generation cell, 21 denotes a positive electrode terminal, 22 denotes a negative electrode terminal, 23 denotes a body of the power generation cell 2, 24 denotes a positive electrode sheet, 25 denotes a negative electrode sheet, and 26 and 27 function as electric insulating layers. Is an electrical insulating tape, and 29 is an electrically insulating adhesive tape. In FIG. 12, the negative electrode terminal 22 is adhered to the vicinity of the left end of the negative electrode sheet 25 in the drawing by an adhesive electric insulating tape 28, and the positive electrode terminal 21 is located between the separator 26 and the positive electrode sheet 24. The positive electrode sheet 24 is attached to the vicinity of the right end of the positive electrode sheet 24 in FIG. 12 is wound from the right end to the left end in the state shown in FIG. 12, and the wound end is adhered with an electrically insulating adhesive tape 29, whereby the columnar power generation cell 2 shown in FIG. can get. Further, the power generating cell 2 shown in FIG. 15 and the envelope-type power generating cell 2 shown in FIG. 16 can be obtained by pressing the cylindrical power generating cell into a flat shape.
[0004]
17 and 19, reference numeral 3 denotes a covering member provided on the power generation cell 2, 1 denotes a battery case, and 4 denotes a double-sided adhesive fixing tape. As described later, the covering member 3 is made of an airtight and moisture-proof aluminum laminated film, and the power generation cell 2 is covered with the covering member 3 for the purpose of airtight and moisture-proof. In FIGS. 17 and 19 and FIGS. 2 and 7 described later, the cross section of the wound body including the positive electrode sheet 24, the negative electrode sheet 25, the separator 26, and the separator 27 is shown in satin. The power generating cell 2 covered with the covering member 3 is housed in a half-split or buttercup-shaped battery case 1, and the positive electrode terminal 21 penetrating a part of the welded portion between the covering members 3 is connected to the positive electrode 11 of the battery. It is connected to the. Although not shown in FIGS. 17 and 19, the negative electrode terminal 22 is connected to the negative electrode 12 in the same manner as the positive electrode 12.
[0005]
By the way, in order to make the weights of the positive electrode terminal 21 and the negative electrode terminal 22 as light as possible in accordance with recent demands for lightweight and compact batteries, as shown in FIG. The length L1 is shorter than the width L2 of the positive electrode sheet 24, the negative electrode sheet 25, and the separations 26 and 27. The lateral width L2 is also a trunk length of the trunk portion 23 of the power generation cell 2. As a result, as shown in FIG. 17, the power generation cell 2 has a first body portion 231 including the positive electrode terminal 21 and the negative electrode terminal 22 and a thinner body than the first body portion 231 by not including the terminals 21 and 22. , And a third trunk portion 233 intermediate the second trunk portion 232.
[0006]
In FIG. 17, h1 is the thickness of the first trunk portion 231, h2 is the thickness of the second trunk portion 232, and the difference Δh therebetween is mainly based on the thickness of the positive terminal 21 and the negative terminal 22. When the power generation cell 2 is adhered to the inner surface of the battery case 1 with the double-sided adhesive fixing tape 4 due to such a thickness difference in the body portion 23, even if the first body portion 231 adheres well, the second body portion 232 In addition, the third torso portion 233, particularly the second torso portion 232, has a problem in that the adhesive force is weak or non-adhesive due to the generation of the gap G (see FIG. 19) based on the difference Δh (one side; Δh / 2). The ratio of the difference Δh to h1 increases as the battery cell 2 becomes thinner. Further, there is a problem that the adhesive strength of the first trunk portion 231 also decreases due to insufficient adhesive strength at the second trunk portion 232. When the adhesive strength of the power generation cell 2 to the inner surface of the battery case 1 is weak, the key pressing strength, the drop resistance and the like of the battery are reduced.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above situation in the prior art, and provides a battery in which the problem of insufficient adhesion to the inner surface of the battery case of the power generation cell has been solved even when the positive electrode terminal and the negative electrode terminal are short. It is an issue.
[0008]
[Means for Solving the Problems]
The battery according to claim 1 of the present invention is a power generation device comprising: a first body portion including an electrode terminal; and a second body portion having a body smaller than the first body portion by not including the electrode terminal. A battery accommodating a cell in a battery case, wherein a thin body compensating member for compensating for thinness of the second body portion is provided on the second body portion.
[0009]
In the battery according to claim 2 of the present invention, in claim 1, the trunk length of the second trunk portion is about 20 to 80% of the full length of the trunk of the power generation cell, and the trunk thin compensation member is configured of the second trunk portion. It is characterized in that it is provided at a position corresponding to at least 30% of the trunk length of the two trunk portions.
[0010]
A battery according to a third aspect of the present invention is the battery according to the first or second aspect, wherein the body thin compensation member is an electrically insulating sheet.
[0011]
The battery according to claim 4 of the present invention is the battery according to any one of claims 1 to 3, wherein the power generation cell has the moisture-proof covering member in a state where the second body portion has the body thin compensation member. Characterized by being coated with:
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
In the following, the same parts or indications as those in FIGS. 12 to 19 are denoted by the same reference numerals, and description thereof may be omitted.
[0013]
Embodiment. 1
1 to 11 illustrate a first embodiment of the battery of the present invention. FIG. 1 is an exploded perspective view of the first embodiment, and FIG. 2 is a perspective view of the first embodiment shown in FIG. FIG. 3 is a cross-sectional view taken along the line II-II in a state where the power generating cell is not disassembled, FIG. 3 is a perspective view of the power generation cell before being covered with the covering member, and FIG. FIG. 5 is a sectional view taken along line VV of FIG. 4, FIG. 6 is a sectional view taken along line VI-VI of FIG. 4, and FIG. 7 is a section taken along line VII-VII of FIG. FIG. 8 is a partially enlarged cross-sectional view of FIG. 5, and FIGS. 9 to 11 are explanatory views for explaining a method of manufacturing the intermediate. 1 to 11, reference numeral 5 denotes a compensation resin sheet as an example of the body thin compensation member, and reference numeral 6 denotes the intermediate. Hereinafter, a case where the flat power generation cell 2 shown in FIG. 15 is used as the power generation cell will be described with reference to FIGS.
[0014]
FIG. 3 shows a state where the compensation resin sheet 5 is addressed in a U-shape on the front and back of the second trunk portion 232 of the flat power generation cell 2 in FIG. The thickness of the compensation resin sheet 5 is 1 / of the difference Δh between the thickness h1 of the first trunk portion 231 and the thickness h2 of the second trunk portion 231 (see FIGS. 17 and 19) or a thickness close thereto. Various electrically insulating resins, especially, sheets of heat-resistant resin such as polyamide, polyimide, polyamide-imide, and polyester, such as Kapton tape, are used. The thicknesses of the positive electrode terminal 21 and the negative electrode terminal 22 which cause the above-described difference Δh vary depending on the capacity and size of the battery, but are generally around 100 μm. The thickness of the resin sheet 5 is preferably about 0.7 Δh / 2 to 1.3 Δh / 2, particularly preferably about 0.8 Δh / 2 to 1.2 Δh / 2. The compensating resin sheet 5 does not necessarily need to be adhered or adhered to the second trunk portion 232, but it is easy to handle it in the production of the battery of the present invention and has a long-term stability of the function as a narrow compensating member. From the standpoint, it is preferable to adhere or adhere to the second trunk portion 232.
[0015]
8B is an enlarged view of a portion C in FIG. 8A, FIG. 9 is a plan view of the covering member 3, and FIG. 10 is a diagram illustrating the power generating cell 2 before the power generating cell 2 is covered with the covering member 3. It is a perspective view of the covering member 3. As shown in FIG. 8 (b), the covering member 3 has a three-layer airtight moisture-proof aluminum having a resin film layer 32 on one side of an intermediate aluminum film layer 31 and a resin film layer 33 on the other side. As shown in FIG. 9 and FIG. 10, a base 34 and a cover 35 are provided on both sides of the boundary TQ as shown in FIGS. 9 and 10, and the power generation cell 2 is disposed substantially at the center of the base 34. A deep drawing 341 is formed as a concave portion to be formed. The portion around the deep drawing 341 becomes a welding margin.
[0016]
As shown in FIGS. 10 and 11, the power generation cell 2 with the compensation resin sheet 5 shown in FIG. 3 is placed on the lid 35, and the cover member 3 is bent along the boundary line TQ so that the power generation cell 2 is deep. The aperture is set to be within the aperture 341. By this bending, the side UT and the side ST of the covering member 3 overlap the side PQ and the side RQ, and the side UP and the side SR respectively. At this time, the respective tips of the positive electrode terminal 21 and the negative electrode terminal 22 of the power generation cell 2 are exposed outside beyond the overlapping portion of the side UP and the side SR. FIG. 11 shows the state of the base 34, the deep drawing 341, the lid 35, the power generation cell 2, the positive terminal 21, and the negative terminal 22 during the bending.
[0017]
Next, the welding margin around the deep drawing 341, that is, the overlapping portion of the side UT and the side ST, the side PQ and the side RQ, and the overlapping portion of the side UP and the side SR and the periphery thereof are thermocompression-bonded, so that The two resin film layers 32 are welded to each other. Thus, the power generation cell 2 covered with the covering member 3 is obtained, and further, in order to minimize the bulk of each welding margin, a welding margin including the side UT and the side ST, and the sides PQ and RQ. Is bent at two places as shown in FIG. 8A. Thus, the intermediate 6 of Embodiment 1 shown in FIGS. 4 to 6 can be obtained.
[0018]
Next, a method for assembling the battery of Embodiment 1 and the battery structure will be described with reference to FIGS. 1 and 2, 1 is a half-split type battery case composed of an upper case 13 and a lower case 14, 15 is an electrode plate having a positive electrode 11 and a negative electrode 12 of a battery on both sides of an electrically insulating substrate, Reference numeral 16 denotes a protective element, 4 denotes a double-sided adhesive fixing tape, and 6 denotes a power generation cell 2 covered with the intermediate shown in FIGS. The intermediate body 6 is installed in the lower case 14, and the tip of the positive terminal 21 is connected to the positive electrode 11 of the battery, and the tip of the negative terminal 22 is connected to the negative electrode 12 of the battery. Next, one surface of the double-sided adhesive fixing tape 4 is adhered to the surface of the covering member 3 on the upper side of the intermediate 6. Thereafter, the upper case 13 is put on the lower case 14 and at the same time, the remaining one side of the double-sided adhesive fixing tape 4 is adhered to the inner wall of the upper case 13. Thus, a battery having the cross-sectional view shown in FIG. 2 can be obtained.
[0019]
As is apparent from FIG. 2, the height of the compensation resin sheet 5 on the second body portion 232 is reduced by providing the compensation resin sheet 5 on the second body portion 232 of the power generation cell 2. 231 or a height close thereto, so that the surface of the covering member 3 covering them is substantially parallel to the inner wall of the upper case 13, and the power generation cell 2 is conventionally formed by the double-sided adhesive fixing tape 4. It is much more stably adhered to the battery case than the technology.
[0020]
In Embodiment 1 and the present invention, the length of the electrode terminals such as the positive electrode terminal 21 and the negative electrode terminal 22 is generally equal to the width of the electrode sheet such as the positive electrode sheet 24 and the negative electrode sheet 25, in other words, the trunk 23 of the power generation cell 2. The body length of the second body portion 232 not including the electrode terminals is about 20-80% of the total body length of the body portion 23. In such a state, the compensation resin sheet 5 is preferably provided at a position corresponding to at least 30%, particularly at least 50% of the trunk length of the second trunk portion 232.
[0021]
The present invention is not limited to the first embodiment, but encompasses the problems to be solved by the present invention and various modifications along the spirit of the solving means. For example, instead of the flat power generation cell shown in FIG. 15 adopted in the first embodiment, a columnar power generation cell shown in FIG. 14 or an envelope type shown in FIG. 16 may be used. Further, as the body thin compensating member, instead of the compensating resin sheet 5 employed in the first embodiment, a member other than resin may be used.
[0022]
In the first embodiment, the compensation resin sheet 5 is covered with the covering member 3 together with the power generation cell 2, but may be provided on the covering member 3 of the power generation cell 2 covered with the covering member 3. However, it is preferable that the compensating resin sheet 5 be placed in the covering member 3 as in the first embodiment because there is no displacement of the compensating resin sheet 5 and the performance of the battery is stabilized.
[0023]
【The invention's effect】
The battery according to claim 1 of the present invention is a power generation device comprising: a first body portion including an electrode terminal; and a second body portion having a body smaller than the first body portion by not including the electrode terminal. A battery containing cells in a battery case, wherein a thin body compensating member resin sheet such as an electrically insulating sheet for compensating the thin body of the second body is provided on the second body. The body length of the second body portion is, for example, about 20 to 80% of the entire body length of the power generation cell, and the body thin compensation member is, for example, at least the body length of the second body portion. Since the gap G is provided at a position corresponding to 30%, the gap G as shown in FIG. 19 does not occur. As a result, the adhesive strength of the double-sided adhesive fixing tape to the inner surface of the battery case of the power generation cell is sufficient and Stable, battery key press strength, drop resistance There is a significant effect of time and improved.
[0024]
Further, when the power generation cell is covered with the moisture-proof covering member in a state where the second body portion has the body thin compensation member, there is no displacement of the body thin compensation member, and the performance of the battery is reduced. Has the effect of stabilizing.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of Embodiment 1.
FIG. 2 is a sectional view taken along line II-II in a state where the first embodiment shown in FIG. 1 is not disassembled.
FIG. 3 is a perspective view of a power generation cell before being covered with a covering member.
FIG. 4 is a perspective view of an intermediate according to the first embodiment.
FIG. 5 is a sectional view taken along the line VV in FIG. 4;
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4;
FIG. 7 is a sectional view taken along the line VII-VII in FIG. 4;
FIG. 8 is a partially enlarged sectional view of FIG. 5;
FIG. 9 is an explanatory view illustrating a method for producing an intermediate.
FIG. 10 is another explanatory view illustrating the method for producing an intermediate.
FIG. 11 is still another explanatory view illustrating the method for producing an intermediate.
FIG. 12 is a development view of a normal power generation cell constituting a battery.
FIG. 13 is a partial cross-sectional view along the line XIII-XIII in FIG. 12;
FIG. 14 is a perspective view of an example of a normal power generation cell.
FIG. 15 is a perspective view of another example of a normal power generation cell.
FIG. 16 is a perspective view of still another example of a normal power generation cell.
FIG. 17 is a cross-sectional view of a normal power generation cell covered with a covering member.
18 is a perspective view of a battery in which the power generation cell of FIG. 15 is housed in a battery case.
19 is a sectional view taken along the line XIX-XIX in FIG.
[Explanation of symbols]
1 battery case, 11 positive electrode, 12 negative electrode, 13 upper case,
14 Lower case, 2 power generation cells, 21 positive terminal, 22 negative terminal,
23 body part of power generation cell, 231 first body part, 232 second body part,
24 positive electrode sheet, 25 negative electrode sheet, 26 separator, 27 separator,
28 electrical insulating tape, 29 adhesive tape, 3 covering members,
4 Double-sided adhesive fixing tape, 5 Compensation resin sheet, 6 Intermediate.

Claims (4)

電極端子を含む第一胴部分と上記電極端子を含まないことにより上記第一胴部分より胴細となっている第二胴部分とから構成された発電セルを電池ケース内に収容した電池であって、上記第二胴部分の胴細を補償する胴細補償部材を上記第二胴部分の上に設けたことを特徴とする電池。A battery in which a power generation cell composed of a first body portion including an electrode terminal and a second body portion which is narrower than the first body portion by not including the electrode terminal is housed in a battery case. A thin body compensating member for compensating for thinness of the second body portion is provided on the second body portion. 上記第二胴部分の胴長は、上記発電セルの胴全長の20〜80%程度であり、上記胴細補償部材は、上記第二胴部分の胴長の少なくとも30%にあたる個所に設けられたことを特徴とする請求項1記載の電池。The body length of the second body part is about 20 to 80% of the total body length of the power generation cell, and the body thin compensation member is provided at a position corresponding to at least 30% of the body length of the second body part. The battery according to claim 1, wherein: 上記胴細補償部材は、電気絶縁性シートであることを特徴とする請求項1または請求項2記載の電池。The battery according to claim 1 or 2, wherein the body compensation member is an electrically insulating sheet. 上記発電セルは、上記第二胴部分に上記胴細補償部材を有する状態で防湿性の被覆部材により被覆されたことを特徴とする請求項1〜請求項3のいずれか一項記載の電池。The battery according to any one of claims 1 to 3, wherein the power generation cell is covered with a moisture-proof covering member in a state where the second body portion has the body thin compensation member.
JP2002205932A 2002-07-15 2002-07-15 Battery Pending JP2004047373A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253011B1 (en) * 2012-06-08 2013-04-15 다이요 유덴 가부시키가이샤 Electrochemical device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253011B1 (en) * 2012-06-08 2013-04-15 다이요 유덴 가부시키가이샤 Electrochemical device

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