JP4096358B2 - battery - Google Patents

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Publication number
JP4096358B2
JP4096358B2 JP2003025052A JP2003025052A JP4096358B2 JP 4096358 B2 JP4096358 B2 JP 4096358B2 JP 2003025052 A JP2003025052 A JP 2003025052A JP 2003025052 A JP2003025052 A JP 2003025052A JP 4096358 B2 JP4096358 B2 JP 4096358B2
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Prior art keywords
battery
unit cell
isolation
view
plate
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JP2004235110A (en
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徳雄 稲益
敏之 温田
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GS Yuasa Corp
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GS Yuasa Corp
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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

Description

【0001】
【発明の属する技術分野】
本発明は電池に関する。
【0002】
【従来の技術】
複数の単電池を同一の収容箱に収容した電池がある。図30および図31は、従来の電池1を示す。この電池1は、扁平の単電池10が扁平厚み方向に沿って並べられた状態で、収容箱11内に収容されている。
【0003】
単電池10は、発電要素10aと、この発電要素10aを被覆する軟質の外装体10bと、発電要素10aに接合された一対のリード端子10cとを備えている。これらの単電池10の端子10cは、収容箱11内で集電部材(図示せず)によって互いに接続されている。また、収容箱11には、通風孔14が形成されている。
【0004】
そして、図32に示すように、複数の電池1が並列に並べられて一体化される。この場合、外側の電池1の側面にファン15が取り付けられる。
【0005】
このファン15によって、電池1の通風孔14からその内部に風が送られて、各単電池10が冷却される。
【0006】
上記のように、従来の電池1は、収容箱11内に複数の単電池10が密着しているため、熱がこもり、各種の不具合が発生する虞れがあった。
【0007】
このような問題を解決するため、図33に示すように、単電池10,10の間にスペーサ16を介在させた電池17が提案されている(例えば、特許文献1参照。)。
【0008】
また、図34に示すように、収容箱11の内面に所定の間隔をあけて複数の溝18を設け、これらの溝18内に単電池10を挿入した電池19が提案されている(例えば、特許文献2参照。)。
【0009】
【特許文献1】
特開2000−195480号公報
【0010】
【特許文献2】
特開2001−256934号公報
【0011】
【発明が解決しようとする課題】
しかしながら、従来の特許文献1,2に記載されている電池17,19は、収容箱11の側面に複数の通風孔14が形成されているため、他の物体がこれらの通風孔14を通して内部の単電池10に接触し過大な力がかかる虞れがあった。
【0012】
単電池10は比較的軟質な外装部材(図示せず)によって覆われているため、単電池10に他の物体が接触して過大な力が作用すると外装部材が変形し、場合によっては破損してしまう。
【0013】
本発明は、このような問題に鑑みてなされたもので、他の物体が接触しても内部の単電池が変形したり、破損するのを防止できる電池を提供するものである。
【0014】
【課題を解決するための手段】
本発明は、一対の端子を有し、発電要素を軟質の外装体により被覆するとともに略扁平状に形成された複数の単電池と、前記各単電池を扁平厚み方向に沿って所定間隔を空けて整列させた状態で収容する収容箱と、前記各単電池間に配置されて前記各単電池を個別に隔離する板状の複数の隔離部材とを備える電池であって、前記各隔離部材の幅寸法および高さ寸法のうちの少なくとも一方が、前記外装体の平面形状幅寸法および平面形状高さ寸法よりも大きいことを特徴とする。
【0015】
本発明によれば、収容箱に形成された通風孔から内部の単電池に他の物体が接触して過大な力が作用した場合でも、隔離部材によって単電池が保護されるので、単電池の変形や破損を防止できる。
【0016】
また、隔離部材の幅寸法または高さ寸法を単電池の外装体の幅寸法または高さ寸法より大きいので、単電池を確実に保護できる。
【0017】
ここで、前記収容箱の内面に前記各隔離部材を所定位置に係合保持するための溝を複数設けることができる。これにより、単電池が膨張した場合でも隔離部材が移動することはないので、隣接する単電池が隔離部材によって保護される。
【0018】
また、前記各隔離部材の面方向に沿って通風可能な通風部を前記各隔離部材に設けることができる。この場合には、隔離部材に形成された通風部を通る空気によって、この隔離部材に隣接する単電池を冷却できるので、電池に対する放熱効果を高めることができる。
【0019】
【発明の実施の形態】
以下、本発明に係る電池の実施の形態を図面を参照して詳細に説明する。
【0020】
(第1実施形態)
図1は、本発明に係る第1実施形態の電池5の水平面に沿って切断して上方から見た横断面図(図1(a))および部分斜視図(図1(b))を示す。この電池5は、略扁平状に形成された複数の単電池50と、これらの単電池50を収容する収容箱51と、単電池50を接続するべく収容箱51に固定された一対の集電部材52(図3参照)と、各単電池50間に配置された複数の隔離部材53とを備えている。
【0021】
次に、上記各構成要素について説明する。単電池50は、図2に示すように、発電要素50aと、この発電要素50aに接合された一対のリード端子50bと、これらのリード端子50bが外部に引き出されるように発電要素50aを被覆する軟質の外装体50cとを有している。
【0022】
収容箱51は、各単電池50を扁平厚み方向に沿って所定間隔を空けて整列させた状態で収容可能に形成されている。この収容箱51の側面には、通風孔51aが形成されている。
【0023】
これらの通風孔51aは、図1に示すように、側板51bの内面付近まで開口されている。このうち、最上部の通風孔51aは、図2に示すように、リード端子50bの付け根付近に形成されている。
【0024】
リード端子50bの付け根は最も熱が発生しやすいので、この付け根付近に通風孔51aを設けることによって、放熱性が向上する。
【0025】
また、単電池50は、図1に示すように、その両側が隔離部材53によって挟まれている。すなわち、隔離部材53の数は、単電池50の数よりも一個多くなっている。
【0026】
更に、両端に配置された隔離部材53は、収容箱51の側板51bに当接している。これらの構成によって、単電池50の放熱効果が更に高くなるので、
両端部に配置された単電池50に対しても、他の単電池50と同様に放熱効果を高めることができる。
集電部材52は、図3に示すように、単電池50の各リード端子50bを介して各単電池50を電気的に接続するように構成されている。これらの集電部材52には、電気取り出し端子52cが設けられている。
【0027】
ここで、集電部材52は、図4(a),(b)にも示すように、単電池50のリード端子50bを折り曲げた状態で接触させる複数の接触部52aと、これらの接触部52aを連結する連結部材52bとを有している。
【0028】
上記の隔離部材53は、図5に示すように、内面が平坦な一対の板状部材53a,53bと、これらの板状部材53a,53bの間に配置された波状部材53cとによって構成されている。
【0029】
そして、板状部材53a,53b間の隙間に、波状部材53cによって画成された通風孔54が形成されている。
【0030】
この隔離部材53は、図6に示すように、板状部材53a,53bと波状部材53cとが一体成形されたものを容易に入手できる。また、図7に示すように、板状部材53a,53bに多数の孔53dが形成されたものも使用できる。
【0031】
この隔離部材53の材質としては、熱伝導性および/または絶縁性に優れた材質が好ましい。熱伝導性に優れた材料としてはアルミニウムや銅といった金属が挙げられる。
【0032】
また、絶縁性に優れた材料としては、酸化アルミニウムや酸化珪素といったセラミック(酸化物)や高分子材料が挙げられる。更に、これら熱伝導性および絶縁性を兼ね備えて持つ樹脂コートした酸化マグネシウムや、アルミラミネートフィルムに代表される金属樹脂複合体などを用いることが望ましい。
【0033】
このように、本発明の電池5によれば、隔離部材53によって単電池50が保護されるので、収容箱51内に通風孔51aを通して他の物体が進入したとしても、この物体が単電池50に接触することがないので、単電池50の変形や破損を防止できる。
【0034】
また、複数の単電池50が隔離部材53によって隔離されているので、単電池50が膨張した場合でも、その影響が他の単電池50に及ぶのを防止できる。
【0035】
さらに、図2に示すように、隔離部材53の幅寸法W2および高さ寸法H2が、単電池50の外装体50cの幅寸法W1および高さ寸法H1より大きいので、単電池50を確実に保護できる。
【0036】
また、隔離部材53がハニカム構造であり、両側の板状部材53a,53bが波状部材53cに線接触するため、温度分布が均一となる。従って、隔離部材53の放熱性が均一となるため、好ましい結果が得られる。
【0037】
なお、上述の実施形態では各隔離部材53の幅寸法W2および高さ寸法H2の両方を、単電池50の外装体50cの平面形状幅寸法W1および平面形状高さ寸法H1よりも大きくしたが、各隔離部材53の幅寸法W2または高さ寸法H2の一方を、単電池50の外装体50cの平面形状幅寸法W1または平面形状高さ寸法H1よりも大きく形成してもよい。
【0038】
(第2実施形態)
図8は第2実施形態の収容箱56の水平面に沿って切断して上方から見た横断面図である。この収容箱56の内側面56aには、各隔離部材53を所定位置に係合保持するための溝56bが複数設けられている。
【0039】
この収容箱56は、単電池50が膨張した場合でも、溝56bに係合保持されている隔離部材53が移動しないので、隔離部材53に隣接する単電池50が押圧されるのを隔離部材53によって保護できる。
【0040】
(第3実施形態)
以下に説明する第3実施形態は、本発明の電池に用いられる単電池の放熱効果を高めるために、隔離部材の形態について工夫を施したものである。
上記の波状部材53c(図5参照)に代えて、図9に示すように、ハニカム構造体60を用いることができる。このハニカム構造体60は、断面が略六角形の筒状体61が多数並べられて構成されている。
【0041】
ここで、ハニカム構造体60は、図10に示すように、その孔が板状部材53a,53bに対して直交するように配置できる。
【0042】
また、図11に示すように、ハニカム構造体60の孔が板状部材53a,53bに対して平行となるように配置することもできる。なお、ハニカム構造体60を単体で隔離部材として用いることもできる。
【0043】
また、上記の板状部材53a,53bに代えて、図12(a)、(b)に示すように、多数の孔62a,62bを有する孔あき板状部材62を用いることができる。孔62a,62bの径は任意であり、径が異なる複数種類の孔62a,62bを混在させてもよい。
【0044】
更に、上記の板状部材53a,53bに代えて、図13に示すように、メッシュ部材63を用いることができる。
【0045】
このメッシュ部材63は、線材を網状に編むことによって形成できる。また、メッシュ部材63は、スクリーン印刷によっても形成できる。このスクリーン印刷では、周知のように薄い金属板に形成すべきメッシュ部分を除いてレジスト液を塗り、これを露光することによって、レジスト液を塗布した部分を抜き取り、メッシュ部分のみを残して、メッシュ状に形成する。
【0046】
また、メッシュ部材63は、エキスパンド製法によって形成できる。エキスパンド製法では、金属板に多数のスリットを設け、この金属板をスリットと直交する方向に引っ張ることによってスリットを開いて、メッシュ状に形成する。
【0047】
エキスパンド製法によって形成されたメッシュ部材63は、単電池50(図1参照)との接触が面ではなく線となりやすいので、放熱性が向上する。
【0048】
また、図14に示すように、上記のハニカム構造体60(図9参照)と、孔あき板状部材62(図12参照)とを組み合わせ、隔離部材66を構成できる。
【0049】
更に、図15に示すように、ハニカム構造体60と、メッシュ部材63(図13参照)とを組み合わせて、隔離部材67を構成できる。
【0050】
(第4実施形態)
以下に説明する第4実施形態は、本発明の電池に用いられる単電池の放熱効果を高めるために、単電池の形態について工夫を施したものである。
上記のリード端子50b(図2参照)には、図16に示すように、その途中までスリット65を形成できる。このリード端子50bは、放熱性が向上する。
【0051】
また、図17に示すように、リード端子50bの先端までスリット65を形成することもできる。
【0052】
更に、図18に示すように、一方の極のリード端子50bを複数設けることもできる。この場合も、放熱性が向上する。
【0053】
また、図19に示すように、正極のリード端子50bと負極のリード端子50bとそれぞれ発電要素50aの対向する辺から取り出すことができる。
【0054】
この場合、図20(a)に示すように、正極のリード端子50bと負極のリード端子50bの取り出し位置を、互いに発電要素50aの反対側に設けることができる。
【0055】
また、図20(b)に示すように、発電要素50aの同一側から、正極のリード端子50bおよび負極のリード端子50bを取り出すことができる。
【0056】
また、図21(a),(b)に示すように、正極のリード端子50bおよび負極のリード端子50bを、発電要素50aの断面における略対角線上に設けることができる。
【0057】
このように、熱が発生しやすい正極および負極のリード端子50bの取り出し位置を互いに離反させるように配置することによって、単電池50の放熱性が向上する。
【0058】
(第5実施形態)
上記の収容箱51(図1参照)は、図22に示すように、その上部開口51cを複数の長孔70aを有する蓋70で閉じることができる。本例では、長孔70aが蓋70の長辺と平行に形成されている。
【0059】
この蓋70を用いることによって、集電部材52,52付近からの放熱性が向上する。
なお、蓋70の長孔70aは、図23に示すように、蓋70の短辺と平行に形成することもできる。
【0060】
また、図24に示すように、集電部材52の幅Bを、取り出し端子52cから遠い方を小さく、近い方を大きく形成してもよい。これは、端子52cに近い部分では多数の単電池10からの電流が集中するのに対し、端子52cから遠い部分では次第に少数の単電池10からの電流しか流れないようになるので、集電部材52の大きな断面積が不要となることを考慮したものである。
これにより、集電部材52の幅Bを同一とした場合(図3参照)に比べて、電池の重量エネルギー密度、および材料コストの点で優れている。
【0061】
(第6実施形態)
図25〜図29は、第6実施形態の隔離部材80〜85を示す。これらの隔離部材80〜85は、次に説明するように、通風孔80a〜85aを有している。これらの通風孔80a〜85aを空気が通過することによって、単電池50が冷却される。
【0062】
すなわち、図25の隔離部材80は、一枚の板状部材で形成され、その内部に並列配置された複数の通風孔80aが形成されている。
【0063】
図26の隔離部材81は、内面が平坦な板状部材81bと、内面に突起81cを有する板状部材81dによって構成され、これらの板状部材81b,81d間の隙間に複数の突起81cによって画成された通風孔81aが形成されている。
【0064】
図27の隔離部材83は、内面に複数の突起83cが形成された一対の板状部材83bによって構成され、これらの板状部材83b間の隙間に突起83cによって画成された通風孔83aが形成されている。
【0065】
図28の隔離部材84は、その両面に水平方向に延びる複数の溝84bを有している。そして、この隔離部材84の溝84bと単電池50との間に通風孔84aが形成される。
【0066】
図29の隔離部材85は、内面に円形の突起85bが形成された板状部材85cと、内面が平坦な板状部材85dとで構成されている。そして、これらの板状部材85c,85dの間に突起85bの高さ分だけの隙間が形成され、この隙間が通風孔85aとして機能する。
【0067】
なお、前述した各実施形態において例示した単電池を構成する軟質の外装体としては、高分子材料の他、アルミラミネートフィルムに代表される金属樹脂複合体等を用いることが望ましい。
また、本発明における単電池としては、リチウムイオン電池,リチウムポリマー電池,ニッケル水素電池,鉛電池等を含み、単電池の種類は不問である。
【0068】
【発明の効果】
以上のように、本発明では、収容箱に形成された通風孔から他の物体が進入しても、隔離部材によって単電池が保護されるので、単電池の変形や破損を防止できる。また、隔離部材の幅寸法または高さ寸法が、単電池の外装体の幅寸法または高さ寸法より大きいので、単電池を確実に保護できる(請求項1)。
【0069】
また、収容箱の内面に各隔離部材を所定位置に係合保持するための溝を複数設けたので、単電池が膨張した場合でも隔離部材によって他の単電池が保護される(請求項2)。
【0070】
また、各隔離部材の面方向に沿って通風可能な通風部を各隔離部材に設けたので、隔離部材に形成された通風部を通る空気によって、この隔離部材に隣接する単電池を冷却できる(請求項3)。
【図面の簡単な説明】
【図1】本発明に係る第1実施形態を示す平断面図である。
【図2】本発明に係る第1実施形態を示す横断面図である。
【図3】本発明に係る集電部材および単電池を示す分解斜視図である。
【図4】図4(a)は本発明に係る集電部材を示す分解斜視図、図4(b)はリード端子の巻き付け状態を示す斜視図である。
【図5】本発明に係る第1実施形態の隔離部材を示す図である。
【図6】本発明に係る第1実施形態の隔離部材を示す斜視図である。
【図7】本発明に係る第1実施形態の別の隔離部材を示す斜視図である。
【図8】本発明に係る第2実施形態の収容箱を示す図である。
【図9】本発明に係る第3実施形態のハニカム構造体を示す斜視図である。
【図10】本発明に係る第3実施形態の隔離部材を示す斜視図である。
【図11】本発明に係る第3実施形態の別の隔離部材を示す斜視図である。
【図12】本発明に係る第3実施形態の孔あき板状部材を示す斜視図である。
【図13】本発明に係る第3実施形態のメッシュ状部材を示す斜視図である。
【図14】本発明に係る第3実施形態の別の隔離部材を示す斜視図である。
【図15】本発明に係る第3実施形態の別の隔離部材を示す斜視図である。
【図16】本発明に係る第4実施形態のリード端子を示す斜視図である。
【図17】本発明に係る第4実施形態の別のリード端子を示す斜視図である。
【図18】本発明に係る第4実施形態の単電池を示す斜視図である。
【図19】本発明に係る第4実施形態の別の単電池を示す斜視図である。
【図20】図20(a)は図19のA矢視図、図20(b)はリード端子の取り出し位置を変更した場合を示す図である。
【図21】図21(a)は本発明に係る第4実施形態の別の単電池を示す斜視図、図21(b)は図21(a)のB矢視図である。
【図22】本発明に係る第5実施形態の収容箱および蓋を示す斜視図である。
【図23】本発明に係る第5実施形態の別の蓋を示す斜視図である。
【図24】本発明に係る第5実施形態の集電部材を示す斜視図である。
【図25】本発明に係る第6実施形態の隔離部材を示す図である。
【図26】本発明に係る第6実施形態の別の隔離部材を示す図である。
【図27】本発明に係る第6実施形態の別の隔離部材を示す図である。
【図28】本発明に係る第6実施形態の別の隔離部材を示す斜視図である。
【図29】本発明に係る第6実施形態の別の隔離部材を示す斜視図である。
【図30】従来の電池を示す分解斜視図である。
【図31】従来の電池を示す平面図である。
【図32】従来例を示す模式平面図である。
【図33】従来例を示す要部斜視図である。
【図34】従来例を示す要部斜視図である。
【符号の説明】
1 電池
5 電池
10 単電池
10a 発電要素
10b 外装体
10c リード端子
11 収容箱
14 通風孔
15 ファン
16 スペーサ
17 電池
18 溝
19 電池
50 単電池
50a 発電要素
50b リード端子
50c 外装体
51 収容箱
51a 通風孔
51b 側板
51c 上部開口
52 集電部材
52a 接触部
52b 連結部材
52c 取り出し端子
53 隔離部材
53a 板状部材
53b 板状部材
53c 波状部材
53d 孔
54 通風孔
56 収容箱
56a 内側面
56b 溝
60 ハニカム構造体
61 筒状体
62 板状部材
62a 孔
62b 孔
63 メッシュ部材
65 スリット
66 隔離部材
67 隔離部材
70 蓋
70a 長孔
80 隔離部材
80a 通風孔
81 隔離部材
81a 通風孔
81b 板状部材
81c 突起
81d 板状部材
83 隔離部材
83a 通風孔
83b 板状部材
83c 突起
84 隔離部材
84a 通風孔
84b 溝
85 隔離部材
85a 通風孔
85b 突起
85c 板状部材
85c 板状部材
85d 板状部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery.
[0002]
[Prior art]
There is a battery in which a plurality of single cells are housed in the same housing box. 30 and 31 show a conventional battery 1. The battery 1 is housed in a housing box 11 in a state in which flat unit cells 10 are arranged along the flat thickness direction.
[0003]
The unit cell 10 includes a power generation element 10a, a soft outer package 10b that covers the power generation element 10a, and a pair of lead terminals 10c joined to the power generation element 10a. The terminals 10 c of these single cells 10 are connected to each other by a current collecting member (not shown) in the housing box 11. Further, a ventilation hole 14 is formed in the storage box 11.
[0004]
And as shown in FIG. 32, the some battery 1 is arranged in parallel and integrated. In this case, the fan 15 is attached to the side surface of the outer battery 1.
[0005]
By this fan 15, air is sent from the ventilation hole 14 of the battery 1 to the inside thereof, and each unit cell 10 is cooled.
[0006]
As described above, in the conventional battery 1, since the plurality of single cells 10 are in close contact with each other in the housing box 11, there is a possibility that heat accumulates and various problems occur.
[0007]
In order to solve such a problem, as shown in FIG. 33, a battery 17 in which a spacer 16 is interposed between the single cells 10 and 10 has been proposed (for example, see Patent Document 1).
[0008]
Further, as shown in FIG. 34, a battery 19 is proposed in which a plurality of grooves 18 are provided at predetermined intervals on the inner surface of the storage box 11, and the single cells 10 are inserted into the grooves 18 (for example, (See Patent Document 2).
[0009]
[Patent Document 1]
JP 2000-195480 A [0010]
[Patent Document 2]
JP 2001-256934 A
[Problems to be solved by the invention]
However, since the batteries 17 and 19 described in the conventional Patent Documents 1 and 2 have a plurality of ventilation holes 14 formed on the side surface of the storage box 11, other objects pass through these ventilation holes 14 and are inside. There is a possibility that an excessive force is applied to the unit cell 10.
[0012]
Since the unit cell 10 is covered with a relatively soft exterior member (not shown), when an excessive force is applied to the unit cell 10 due to contact with another object, the exterior member is deformed and sometimes damaged. End up.
[0013]
The present invention has been made in view of such a problem, and provides a battery capable of preventing the internal cell from being deformed or damaged even when another object comes into contact therewith.
[0014]
[Means for Solving the Problems]
The present invention has a pair of terminals, the power generation element is covered with a soft outer casing, and a plurality of unit cells formed in a substantially flat shape, and each unit cell is spaced apart along the flat thickness direction. A battery that is housed in an aligned state, and a plurality of plate-shaped isolation members that are arranged between the single cells and individually isolate the single cells. At least one of the width dimension and the height dimension is larger than the planar shape width dimension and the planar shape height dimension of the exterior body.
[0015]
According to the present invention, even when another object comes into contact with the internal cell from the ventilation hole formed in the storage box and an excessive force is applied, the cell is protected by the isolation member. Deformation and damage can be prevented.
[0016]
Moreover, since the width dimension or height dimension of the separating member is larger than the width dimension or height dimension of the exterior body of the unit cell, the unit cell can be reliably protected.
[0017]
Here, a plurality of grooves for engaging and holding the isolation members at predetermined positions can be provided on the inner surface of the storage box. Thereby, even when the unit cell expands, the separating member does not move, so that the adjacent unit cell is protected by the separating member.
[0018]
Moreover, the ventilation part which can ventilate along the surface direction of each said isolation member can be provided in each said isolation member. In this case, since the unit cell adjacent to the isolation member can be cooled by the air passing through the ventilation portion formed in the isolation member, the heat dissipation effect on the battery can be enhanced.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a battery according to the present invention will be described in detail with reference to the drawings.
[0020]
(First embodiment)
FIG. 1 shows a cross-sectional view (FIG. 1 (a)) and a partial perspective view (FIG. 1 (b)) as viewed from above by cutting along the horizontal plane of the battery 5 of the first embodiment according to the present invention. . The battery 5 includes a plurality of single cells 50 formed in a substantially flat shape, a storage box 51 that stores the single cells 50, and a pair of current collectors fixed to the storage box 51 to connect the single cells 50. A member 52 (see FIG. 3) and a plurality of separating members 53 disposed between the single cells 50 are provided.
[0021]
Next, each of the above components will be described. As shown in FIG. 2, the unit cell 50 covers the power generation element 50 a, a pair of lead terminals 50 b joined to the power generation element 50 a, and the lead terminals 50 b so as to be drawn out to the outside. And a soft outer package 50c.
[0022]
The storage box 51 is formed so that each unit cell 50 can be stored in a state where the unit cells 50 are aligned at a predetermined interval along the flat thickness direction. A ventilation hole 51 a is formed on the side surface of the storage box 51.
[0023]
These ventilation holes 51a are opened to the vicinity of the inner surface of the side plate 51b as shown in FIG. Among these, the uppermost ventilation hole 51a is formed near the base of the lead terminal 50b as shown in FIG.
[0024]
Since the base of the lead terminal 50b is most likely to generate heat, providing the ventilation hole 51a near the base improves heat dissipation.
[0025]
Further, as shown in FIG. 1, both sides of the unit cell 50 are sandwiched between isolation members 53. That is, the number of isolation members 53 is one more than the number of unit cells 50.
[0026]
Further, the separating members 53 arranged at both ends are in contact with the side plate 51 b of the storage box 51. With these configurations, the heat dissipation effect of the unit cell 50 is further enhanced,
The heat dissipation effect can be enhanced with respect to the unit cells 50 arranged at both ends as well as the other unit cells 50.
As shown in FIG. 3, the current collecting member 52 is configured to electrically connect each unit cell 50 via each lead terminal 50 b of the unit cell 50. These current collecting members 52 are provided with electrical extraction terminals 52c.
[0027]
Here, as shown in FIGS. 4A and 4B, the current collecting member 52 includes a plurality of contact portions 52a that contact the lead terminals 50b of the unit cell 50 in a bent state, and these contact portions 52a. And a connecting member 52b for connecting the two.
[0028]
As shown in FIG. 5, the isolation member 53 includes a pair of plate-like members 53a and 53b having a flat inner surface, and a wave-like member 53c disposed between the plate-like members 53a and 53b. Yes.
[0029]
A ventilation hole 54 defined by the corrugated member 53c is formed in the gap between the plate-like members 53a and 53b.
[0030]
As shown in FIG. 6, the separating member 53 can be easily obtained by integrally forming plate-like members 53a and 53b and a wave-like member 53c. Moreover, as shown in FIG. 7, the plate-like members 53a and 53b having a large number of holes 53d can be used.
[0031]
As a material of the isolation member 53, a material excellent in thermal conductivity and / or insulation is preferable. Examples of the material having excellent thermal conductivity include metals such as aluminum and copper.
[0032]
In addition, examples of materials having excellent insulating properties include ceramics (oxides) such as aluminum oxide and silicon oxide, and polymer materials. Furthermore, it is desirable to use a resin-coated magnesium oxide having both thermal conductivity and insulating properties, a metal resin composite represented by an aluminum laminate film, and the like.
[0033]
As described above, according to the battery 5 of the present invention, the unit cell 50 is protected by the isolation member 53, so that even if another object enters the accommodation box 51 through the ventilation hole 51 a, this object Therefore, deformation and breakage of the unit cell 50 can be prevented.
[0034]
In addition, since the plurality of unit cells 50 are isolated by the isolation member 53, even when the unit cell 50 expands, it is possible to prevent the influence of the other unit cells 50 from being affected.
[0035]
Furthermore, as shown in FIG. 2, since the width dimension W2 and the height dimension H2 of the separating member 53 are larger than the width dimension W1 and the height dimension H1 of the exterior body 50c of the unit cell 50, the unit cell 50 is reliably protected. it can.
[0036]
Moreover, since the separating member 53 has a honeycomb structure and the plate-like members 53a and 53b on both sides are in line contact with the wave-like member 53c, the temperature distribution is uniform. Therefore, since the heat dissipation of the isolation member 53 is uniform, a preferable result is obtained.
[0037]
In the above-described embodiment, both the width dimension W2 and the height dimension H2 of each isolation member 53 are larger than the planar shape width dimension W1 and the planar shape height dimension H1 of the exterior body 50c of the unit cell 50. One of the width dimension W2 or the height dimension H2 of each isolation member 53 may be formed larger than the planar shape width dimension W1 or the planar shape height dimension H1 of the outer package 50c of the unit cell 50.
[0038]
(Second Embodiment)
FIG. 8 is a cross-sectional view taken along the horizontal plane of the storage box 56 of the second embodiment and viewed from above. A plurality of grooves 56b are provided on the inner side surface 56a of the storage box 56 for engaging and holding the isolation members 53 at predetermined positions.
[0039]
Even when the unit cell 50 expands, the storage box 56 does not move the isolation member 53 engaged and held in the groove 56b, so that the unit cell 50 adjacent to the isolation member 53 is pressed against the isolation member 53. Can be protected by.
[0040]
(Third embodiment)
In the third embodiment described below, the form of the separating member is devised in order to enhance the heat dissipation effect of the unit cell used in the battery of the present invention.
Instead of the corrugated member 53c (see FIG. 5), a honeycomb structure 60 can be used as shown in FIG. The honeycomb structure 60 is configured by arranging a large number of cylindrical bodies 61 having a substantially hexagonal cross section.
[0041]
Here, as shown in FIG. 10, the honeycomb structure 60 can be disposed so that the holes thereof are orthogonal to the plate-like members 53a and 53b.
[0042]
Moreover, as shown in FIG. 11, it can also arrange | position so that the hole of the honeycomb structure 60 may become parallel with respect to the plate-shaped members 53a and 53b. The honeycomb structure 60 can be used alone as a separating member.
[0043]
Further, instead of the plate-like members 53a and 53b, a perforated plate-like member 62 having a large number of holes 62a and 62b can be used as shown in FIGS. The diameters of the holes 62a and 62b are arbitrary, and a plurality of types of holes 62a and 62b having different diameters may be mixed.
[0044]
Further, a mesh member 63 can be used as shown in FIG. 13 instead of the plate-like members 53a and 53b.
[0045]
The mesh member 63 can be formed by knitting a wire rod in a net shape. The mesh member 63 can also be formed by screen printing. In this screen printing, as is well known, a resist solution is applied except for a mesh portion to be formed on a thin metal plate, and by exposing the resist solution, a portion where the resist solution is applied is extracted, leaving only the mesh portion, and a mesh. To form.
[0046]
Further, the mesh member 63 can be formed by an expanding manufacturing method. In the expanding manufacturing method, a number of slits are provided in a metal plate, and the slits are opened by pulling the metal plate in a direction perpendicular to the slits to form a mesh.
[0047]
Since the mesh member 63 formed by the expanding manufacturing method is likely to be a line rather than a surface in contact with the cell 50 (see FIG. 1), the heat dissipation is improved.
[0048]
As shown in FIG. 14, the honeycomb structure 60 (see FIG. 9) and the perforated plate-like member 62 (see FIG. 12) can be combined to form the separating member 66.
[0049]
Further, as shown in FIG. 15, the separating member 67 can be configured by combining the honeycomb structure 60 and the mesh member 63 (see FIG. 13).
[0050]
(Fourth embodiment)
In the fourth embodiment described below, the form of the unit cell is devised in order to enhance the heat dissipation effect of the unit cell used in the battery of the present invention.
In the lead terminal 50b (see FIG. 2), a slit 65 can be formed halfway as shown in FIG. The lead terminal 50b has improved heat dissipation.
[0051]
Moreover, as shown in FIG. 17, the slit 65 can also be formed to the front-end | tip of the lead terminal 50b.
[0052]
Further, as shown in FIG. 18, a plurality of lead terminals 50b on one pole can be provided. Also in this case, heat dissipation is improved.
[0053]
Further, as shown in FIG. 19, the positive lead terminal 50b and the negative lead terminal 50b can be taken out from opposite sides of the power generation element 50a, respectively.
[0054]
In this case, as shown in FIG. 20A, the lead-out positions of the positive lead terminal 50b and the negative lead terminal 50b can be provided on opposite sides of the power generation element 50a.
[0055]
Further, as shown in FIG. 20B, the positive lead terminal 50b and the negative lead terminal 50b can be taken out from the same side of the power generation element 50a.
[0056]
Further, as shown in FIGS. 21A and 21B, the positive lead terminal 50b and the negative lead terminal 50b can be provided on a substantially diagonal line in the cross section of the power generation element 50a.
[0057]
Thus, the heat dissipation of the unit cell 50 is improved by disposing the take-out positions of the positive and negative lead terminals 50b that are likely to generate heat away from each other.
[0058]
(Fifth embodiment)
As shown in FIG. 22, the storage box 51 (see FIG. 1) can close the upper opening 51c with a lid 70 having a plurality of long holes 70a. In this example, the long hole 70 a is formed in parallel with the long side of the lid 70.
[0059]
By using this lid 70, the heat dissipation from the current collecting members 52, 52 is improved.
In addition, the long hole 70a of the lid | cover 70 can also be formed in parallel with the short side of the lid | cover 70, as shown in FIG.
[0060]
Further, as shown in FIG. 24, the width B of the current collecting member 52 may be formed so that the distance farther from the takeout terminal 52c is smaller and the closer one is larger. This is because current from a large number of single cells 10 concentrates in a portion near the terminal 52c, whereas current from a small number of single cells 10 gradually flows in a portion far from the terminal 52c. This is because the large cross-sectional area of 52 becomes unnecessary.
Thereby, compared with the case where the width | variety B of the current collection member 52 is made the same (refer FIG. 3), it is excellent in the point of the weight energy density of a battery, and material cost.
[0061]
(Sixth embodiment)
25 to 29 show isolation members 80 to 85 according to the sixth embodiment. These isolation members 80 to 85 have ventilation holes 80 a to 85 a as described below. When the air passes through these ventilation holes 80a to 85a, the unit cell 50 is cooled.
[0062]
That is, the isolation member 80 of FIG. 25 is formed of a single plate-like member, and a plurality of ventilation holes 80a arranged in parallel are formed therein.
[0063]
26 is configured by a plate-like member 81b having a flat inner surface and a plate-like member 81d having a protrusion 81c on the inner surface, and a plurality of protrusions 81c define a gap between these plate-like members 81b and 81d. The formed ventilation hole 81a is formed.
[0064]
27 is constituted by a pair of plate-like members 83b having a plurality of projections 83c formed on the inner surface, and a ventilation hole 83a defined by the projections 83c is formed in a gap between these plate-like members 83b. Has been.
[0065]
The isolation member 84 of FIG. 28 has a plurality of grooves 84b extending in the horizontal direction on both surfaces thereof. A ventilation hole 84 a is formed between the groove 84 b of the isolation member 84 and the unit cell 50.
[0066]
29 is composed of a plate-like member 85c having a circular protrusion 85b formed on the inner surface and a plate-like member 85d having a flat inner surface. A gap corresponding to the height of the protrusion 85b is formed between the plate-like members 85c and 85d, and this gap functions as the ventilation hole 85a.
[0067]
In addition, as a soft exterior body which comprises the single battery illustrated in each embodiment mentioned above, it is desirable to use the metal resin composite represented by the aluminum laminate film etc. other than a polymer material.
Moreover, as a single battery in this invention, a lithium ion battery, a lithium polymer battery, a nickel hydride battery, a lead battery, etc. are included, and the kind of single battery is not ask | required.
[0068]
【The invention's effect】
As described above, in the present invention, even when another object enters from the ventilation hole formed in the storage box, the unit cell is protected by the isolation member, so that the unit cell can be prevented from being deformed or damaged. Moreover, since the width dimension or height dimension of the isolation member is larger than the width dimension or height dimension of the exterior body of the unit cell, the unit cell can be reliably protected (Claim 1).
[0069]
In addition, since a plurality of grooves are provided on the inner surface of the storage box for engaging and holding each isolation member at a predetermined position, even if the single cell expands, other single cells are protected by the isolation member. .
[0070]
Moreover, since the ventilation part which can ventilate along the surface direction of each isolation member was provided in each isolation member, the single cell adjacent to this isolation member can be cooled with the air which passed the ventilation part formed in the isolation member ( Claim 3).
[Brief description of the drawings]
FIG. 1 is a plan sectional view showing a first embodiment according to the present invention.
FIG. 2 is a cross-sectional view showing a first embodiment according to the present invention.
FIG. 3 is an exploded perspective view showing a current collecting member and a unit cell according to the present invention.
4A is an exploded perspective view showing a current collecting member according to the present invention, and FIG. 4B is a perspective view showing a winding state of a lead terminal.
FIG. 5 is a view showing a separating member according to a first embodiment of the present invention.
FIG. 6 is a perspective view showing a separating member according to the first embodiment of the present invention.
FIG. 7 is a perspective view showing another isolation member according to the first embodiment of the present invention.
FIG. 8 is a view showing a storage box according to a second embodiment of the present invention.
FIG. 9 is a perspective view showing a honeycomb structured body according to a third embodiment of the present invention.
FIG. 10 is a perspective view showing a separating member according to a third embodiment of the present invention.
FIG. 11 is a perspective view showing another isolation member according to the third embodiment of the present invention.
FIG. 12 is a perspective view showing a perforated plate member according to a third embodiment of the present invention.
FIG. 13 is a perspective view showing a mesh member according to a third embodiment of the present invention.
FIG. 14 is a perspective view showing another isolation member according to the third embodiment of the present invention.
FIG. 15 is a perspective view showing another isolation member according to the third embodiment of the present invention.
FIG. 16 is a perspective view showing a lead terminal according to a fourth embodiment of the present invention.
FIG. 17 is a perspective view showing another lead terminal according to the fourth embodiment of the present invention.
FIG. 18 is a perspective view showing a unit cell according to a fourth embodiment of the present invention.
FIG. 19 is a perspective view showing another unit cell according to the fourth embodiment of the present invention.
20 (a) is a view taken in the direction of arrow A in FIG. 19, and FIG. 20 (b) is a diagram showing a case where the lead terminal extraction position is changed.
FIG. 21 (a) is a perspective view showing another unit cell of the fourth embodiment according to the present invention, and FIG. 21 (b) is a view taken in the direction of arrow B in FIG. 21 (a).
FIG. 22 is a perspective view showing a storage box and a cover according to a fifth embodiment of the present invention.
FIG. 23 is a perspective view showing another lid of the fifth embodiment according to the present invention.
FIG. 24 is a perspective view showing a current collecting member according to a fifth embodiment of the present invention.
FIG. 25 is a view showing a separating member according to a sixth embodiment of the present invention.
FIG. 26 is a view showing another isolation member according to the sixth embodiment of the present invention.
FIG. 27 is a view showing another isolation member according to the sixth embodiment of the present invention.
FIG. 28 is a perspective view showing another isolation member according to the sixth embodiment of the present invention.
FIG. 29 is a perspective view showing another isolation member according to the sixth embodiment of the present invention.
FIG. 30 is an exploded perspective view showing a conventional battery.
FIG. 31 is a plan view showing a conventional battery.
FIG. 32 is a schematic plan view showing a conventional example.
FIG. 33 is a main part perspective view showing a conventional example.
FIG. 34 is a perspective view showing a main part of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery 5 Battery 10 Single cell 10a Power generation element 10b Exterior body 10c Lead terminal 11 Housing box 14 Ventilation hole 15 Fan 16 Spacer 17 Battery 18 Groove 19 Battery 50 Single battery 50a Power generation element 50b Lead terminal 50c Exterior body 51 Housing box 51a Ventilation hole 51b Side plate 51c Upper opening 52 Current collecting member 52a Contact portion 52b Connecting member 52c Extraction terminal 53 Isolation member 53a Plate member 53b Plate member 53c Wave member 53d Hole 54 Ventilation hole 56 Storage box 56a Inner side surface 56b Groove 60 Honeycomb structure 61 Cylindrical body 62 Plate member 62a Hole 62b Hole 63 Mesh member 65 Slit 66 Isolation member 67 Isolation member 70 Lid 70a Long hole 80 Isolation member 80a Ventilation hole 81 Separation member 81a Ventilation hole 81b Plate member 81c Projection 81d Plate member 83 Isolation member 83a Ventilation hole 83b Plate-shaped part Material 83c Protrusion 84 Isolation member 84a Ventilation hole 84b Groove 85 Isolation member 85a Ventilation hole 85b Protrusion 85c Plate member 85c Plate member 85d Plate member

Claims (3)

一対の端子を有し、発電要素を軟質の外装体により被覆するとともに略扁平状に形成された複数の単電池と、
前記各単電池を扁平厚み方向に沿って所定間隔を空けて整列させた状態で収容する収容箱と、
前記各単電池間に配置されて前記各単電池を個別に隔離する板状の複数の隔離部材とを備える電池であって、
前記各隔離部材の幅寸法および高さ寸法のうちの少なくとも一方が、前記外装体の平面形状幅寸法および平面形状高さ寸法よりも大きいことを特徴とする電池。
A plurality of single cells having a pair of terminals, covering the power generation element with a soft exterior body and formed in a substantially flat shape;
A storage box for storing each unit cell in a state of being aligned at a predetermined interval along the flat thickness direction;
A battery comprising a plurality of plate-shaped isolation members arranged between the single cells and individually separating the single cells,
At least one of the width dimension and the height dimension of each said isolation member is larger than the planar shape width dimension and planar shape height dimension of the said exterior body, The battery characterized by the above-mentioned.
前記収容箱の内面に前記各隔離部材を所定位置に係合保持するための溝が複数設けられていることを特徴とする請求項1に記載した電池。2. The battery according to claim 1, wherein a plurality of grooves are provided on the inner surface of the storage box for engaging and holding the isolation members at predetermined positions. 前記各隔離部材の面方向に沿って通風可能な通風部が前記各隔離部材に設けられていることを特徴とする請求項1に記載した電池。2. The battery according to claim 1, wherein a ventilation portion capable of ventilating along the surface direction of each isolation member is provided in each isolation member.
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