[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JP3680797B2 - Non-aqueous electrolyte battery - Google Patents

Non-aqueous electrolyte battery Download PDF

Info

Publication number
JP3680797B2
JP3680797B2 JP2002032104A JP2002032104A JP3680797B2 JP 3680797 B2 JP3680797 B2 JP 3680797B2 JP 2002032104 A JP2002032104 A JP 2002032104A JP 2002032104 A JP2002032104 A JP 2002032104A JP 3680797 B2 JP3680797 B2 JP 3680797B2
Authority
JP
Japan
Prior art keywords
power generation
battery case
generation element
resin film
nonaqueous electrolyte
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002032104A
Other languages
Japanese (ja)
Other versions
JP2003234094A (en
Inventor
村井　　哲也
Original Assignee
日本電池株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電池株式会社 filed Critical 日本電池株式会社
Priority to JP2002032104A priority Critical patent/JP3680797B2/en
Publication of JP2003234094A publication Critical patent/JP2003234094A/en
Application granted granted Critical
Publication of JP3680797B2 publication Critical patent/JP3680797B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Primary Cells (AREA)
  • Secondary Cells (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、電池ケースを樹脂フィルムによって形成した非水電解質電池に関する。
【０００２】
【従来の技術】
近年、携帯型電子機器の発達がめざましいが、このような携帯型電子機器に使用される電池の小型軽量化の要望がますます高まっている。電池重量の軽減のための手段のひとつとして、従来使用されていた容器状の金属ケースに代わり、可撓性を有する袋状の金属ラミネートケース外装体を用いた電池が検討されている。しかし、この種の電池は、ケース内に収容された発電要素を圧迫する能力に劣り、電池ケース内で発電要素がずれ動くことを防止しにくいという問題がある。このため、電池が落下等により衝撃を受けた際に、電池ケース内で発電要素が大きく動いたり変形したりしてしまい、その結果、発電要素から導出されたリード片が接続部分で切れて電池として機能できなくなることがあった。
【０００３】
【発明が解決しようとする課題】
本発明は上記事情に鑑みてなされたものであって、電池ケースを樹脂フィルムによって形成した非水電解質電池において、その耐衝撃性を改善することを目的とするものである。
【０００４】
【課題を解決するための手段】
上記課題を解決するための請求項１の発明は、可撓性を有する樹脂フィルムにて形成した電池ケース内に巻回型の発電要素を収容して密閉してなるものにおいて、前記発電要素を前記電池ケース内に複数個収容し、前記樹脂フィルムが前記発電要素間に形成されるくびれ部分に入り込み、前記発電要素群の外面にぴったり沿う形状で密着させたところに特徴を有する。
【０００５】
また、請求項２の発明は、請求項１に記載の非水電解質電池であって、前記各発電要素間の少なくとも一部が接着剤により相互に接着されているところに特徴を有する。
【０００６】
請求項３の発明は、請求項１または２に記載の非水電解質電池であって、前記発電要素と前記樹脂フィルムとが接着剤により接着されているところに特徴を有する。
【０００７】
請求項４の発明は、請求項１ないし３のいずれかに記載の非水電解質電池であって、前記発電要素から導出されたリード片が前記電池ケース内において電気的に接続されているところに特徴を有する。
【０００８】
さらに請求項５の発明は、請求項１ないし請求項４のいずれかに記載の非水電解質電池であって、前記電池ケースは、前記樹脂フィルムの端縁部を互いに積層して接着することによって封口されると共に、前記発電要素から導出されたリード片が前記樹脂フィルムの前記積層部分の前記樹脂フィルム間を通って前記電池ケース外に導出され、かつ、それらのリード片は前記樹脂フィルムの前記積層部分内で他の発電要素との間で電気的に接続されているところに特徴を有する。
【０００９】
【発明の作用】
巻回型の発電要素は従来の積層型に比べて生産性に優れるが、複数個並べた場合に、発電要素の周縁が丸みをおびていることから、各発電要素間にくびれ部分が形成される。このようなくびれ部分があると、発電要素を電池ケース内に収容した場合に、発電要素間のくびれ部分と電池ケースとの間に大きな空間が生じ、特に電池ケースが可撓性を有する樹脂フィルムにて形成されている場合には、電池が衝撃を受けた際に発電要素が電池ケース内で大きく動いてしまう。
【００１０】
そこで、上記請求項１の発明では、上述したように、樹脂フィルムを発電要素間に形成されるくびれ部分に入り込むように密着させる構成とした。このようにすると、電池ケースと発電要素との間に余分な隙間が存在しないから、電池に落下等による衝撃が加わった場合でも、発電要素が電池ケース内で大きく動いてしまったり、互いにずれて大きく変形することが防止される。したがって、発電要素から導出されたリード片が接続部分で切れることを防止することができ、耐衝撃性に優れる非水電解質電池を得ることができるという優れた作用効果を奏する。
【００１１】
また、請求項２の発明によれば、各巻回型発電要素間の少なくとも一部が接着剤により相互に固定されているから、電池に衝撃が加わった場合でも各発電要素がさらにずれ難くなり、耐衝撃性がさらに向上する。
【００１２】
請求項３の発明によれば、発電要素と樹脂フィルムとが接着剤により固定されているから、同じく電池に衝撃が加わった場合でも発電要素と電池ケースとがずれ難くなり、耐衝撃性が向上する。
【００１３】
請求項４および請求項５の発明によれば、各発電要素間のリード片の接続部分が電池ケースの外部に露出している場合と比較して、各リード片の接続部分が破断し難くなるとともに、酸化等の腐食を受け難いという作用効果を奏する。
【００１４】
【発明の実施の形態】
＜第１実施形態＞
以下、本発明を具体化した第１実施形態について図１ないし図４を参照して説明する。
図１は本実施形態にかかる非水電解質電池１０の分解斜視図である。この非水電解質電池１０は、例えば、正極と負極とがセパレータを介して巻回された３つの扁平な発電要素１１Ａ，１１Ｂ，１１Ｃを積層させて構成される発電要素群１２と、電解質塩を含有した図示しない非水電解液とを、可撓性を有する金属ラミネート樹脂フィルムからなる電池ケース内２０に収納してなるものである。各発電要素１１Ａ，１１Ｂ，１１Ｃ間の長さ方向の周縁部には、くびれ部分１６が形成されている。
【００１５】
上記発電要素群１２は、上述したように３つの発電要素１１Ａ，１１Ｂ，１１Ｃからなり、図１に示すように、中央に位置する発電要素１１Ｂの長さがその両側に位置する発電要素１１Ａ，１１Ｃの長さよりも長くなるように構成されるとともに、その幅はほぼ同等となるように構成されている。また、これら各発電要素１１Ａ，１１Ｂ，１１Ｃは、それぞれ積層部分が図示しない接着剤により固定されて、積層状態が強固に保持されている。また、各発電要素１１Ａ，１１Ｂ，１１Ｃからは、それぞれの正極および負極と電気的に接続された厚み５０〜１００μｍの銅、アルミニウム、ニッケルなどの金属導体からなる正極リード片１３Ａ，１３Ｂ，１３Ｃおよび負極リード片１４Ａ，１４Ｂ，１４Ｃが一方側に揃えて導出されている。発電要素１１Ａ，１１Ｃの正極リード片１３Ａ，１３Ｃおよび負極リード片１４Ａ，１４Ｃは、図中上方に延びて発電要素１１Ｂの外面にぴったり沿うように折り曲げられており、それらの先端部は発電要素１１Ｂの両リード片１３Ｂ，１４Ｂの基部に電気的に接続されている。
【００１６】
また、発電要素１１Ｂの正極リード片１３Ｂおよび負極リード片１４Ｂの長さ方向の中心付近には、酸変性ポリエチレンからなる厚さ５０μｍの接着層が両面に設けられ、その外側に電解液バリア層として７０μｍのエバール樹脂（クラレ製のエチレンビニルアルコール共重合樹脂）層が設けられている（いずれも図示せず）。
【００１７】
一方、電池ケース２０は、例えば、厚さ１２μｍのポリエチレンテレフタレート（ＰＥＴ）フィルム２１の内面側にバリア層として厚さ９μｍのアルミニウム箔２２がウレタン系接着剤によりラミネートされたものであり、さらにアルミニウム箔２２の内面には熱溶着層２３として厚さ１００μｍの酸変性ポリエチレン（ＰＥ）層が設けられている。なお、図１中２４，２５は熱溶着部を示している。
【００１８】
本実施形態の非水電解質電池１０は、次のようにして完成される。すなわち、まず上記電池ケース２０の内部に上記発電要素群１２と図示しない非水電解液とを収容するとともに、その開口部２６を正極リード片１３Ｂおよび負極リード片１４Ｂを挟んだ状態で重ね合わせて閉じる。この時、正極リード片１３Ｂおよび負極リード片１４Ｂの先端部分は、電池ケース２０から導出された状態としておく。そして、電池ケース２０の内部を減圧した後、全体を加熱することにより熱溶着層２３を溶融させて、発電要素１１と電池ケース２０との間を溶着するとともに、開口部２６を溶着封口する。また、この時、必要に応じて圧迫用の治具を併用してもよい。
【００１９】
図２ないし図４は、上記発電要素群１２および非水電解液を電池ケース２０の内部に収容した本実施形態の非水電解質電池１０の完成形態を示す図である。図２はその斜視図であり、この図に示すように、電池ケース２０はその内部に収容された発電要素群１２の外面にぴったり沿う形状とされている。特に、各発電要素１１Ａ，１１Ｂ，１１Ｃ間のくびれ部分１６にも密着されており、これにより、図３および図４の断面図に示すように、電池ケース２０の内部には余分な空間が生じない構成とされている。また、電池ケース２０の内面と発電要素群１２の外面とは、上述した熱溶着層２３により溶着されて、固定された状態となっている。
【００２０】
このような本実施形態の非水電解質電池１０によれば、電池ケース２０と発電要素群１２との間に余分な隙間が存在せず、また各発電要素１１の相互間、および、発電要素群１２と電池ケース２０との間が、それぞれ接着層および熱溶着層２３により固定された状態となっている。従って、落下等により電池に衝撃が加わった場合でも、各発電要素１１の積層状態が簡単に崩れたり、発電要素群１２が電池ケース２０内で大きく動いたりてしまうことが極めて起こり難くなり、リード片の切断を防止することができるという優れた作用効果を奏する。また、各発電要素１１が巻回型であるから、従来の積層型ものを使用する場合と比較して、生産性に優れる。
【００２１】
さらに、各発電要素１１の両リード片１３，１４間の接続部分が電池ケース２０の内部に収容される構成であるから、接続部分がより破断し難くなるとともに、酸化等の腐食を受け難い。
【００２２】
＜第２実施形態＞
図５ないし図７は、本発明の第２実施形態の非水電解質電池３０を示すものである。本実施形態では、上記第１実施形態と同様の構成でかつ大きさが等しい２つの発電要素３１Ａ，３１Ｂを横に並べて発電要素群３２を構成し、この発電要素群３２と図示しない非水電解液とを、同じく第１実施形態と同様の構成の電池ケース４０内に密閉収容したものである。また、発電要素３１Ａの正極リード片３３Ａは負極リード片３４Ａよりも長さが長くなるように形成されているとともに、発電要素３１Ｂの正極リード片３３Ｂは負極リード片３４Ｂよりも短くなるように形成されており、負極リード片３４Ａと正極リード片３３Ｂとが例えばニッケル板３５に溶接されることによって、発電要素３１Ａおよび３１Ｂは電気的に直列に接続されている。なお、このニッケル板３５は、電池ケース４０の封口部４１内に位置するように構成されている。
【００２３】
本実施形態の非水電解質電池３０においても、上記第１実施形態と同様に、各発電要素３１Ａ，３１Ｂ間のくびれ部分３６に電池ケース４０が密着することにより、電池ケース４０と発電要素群３２との間に余分な隙間が存在せず、また発電要素群３２と電池ケース４０との間が熱溶着されて固定された状態となっているから、電池に衝撃が加わった場合でもリード片が切断することを防止することができる。また、本実施形態のように、電池ケース４０の封口部４１内で各リード片間の接続を行う構成とすると、接続部分が空気に触れないだけでなく、電解液にも晒されないので、さらに腐食を受け難くすることができる。
【００２４】
＜第３実施形態＞
図８は、本発明の第３実施形態の非水電解質電池５０を示すものである。本実施形態では、各発電要素５１Ａ，５１Ｂを上記第２実施形態と同様に横に並べて発電要素群５２を構成したものであるが、各発電要素５１Ａ，５１Ｂ間を電気的に並列に接続しているところが上記第２実施形態とは異なる。図８に示すように、各発電要素５１Ａ，５１Ｂからは両リード片５３，５４が互いに反対側に位置するように導出されているとともに、発電要素５１Ａの両リード片５３Ａ，５４Ａが長く、発電要素５１Ｂの両リード片５３Ｂ，５４Ｂが短く構成されている。そして、それぞれ正極リード片５３Ａ，５３Ｂ間、および負極リード片５４Ａ，５４Ｂ間が、電池ケース６０の封口部６１において、ニッケル板５５によって電気的に接続されており、発電要素５１Ａの両リード片５３Ａ，５３Ｂだけが外部に導出されている。
なお、本実施形態においても、上記実施形態と同様に各発電要素５１Ａ，５１Ｂ間のくびれ部分５６に電池ケース６０が密着しており、上記実施形態と同様の作用効果が得られる。
【００２５】
＜第４実施形態＞
図９ないし図１１は、本発明の第４実施形態の非水電解質電池７０を示すものである。本実施形態では、上記実施形態と同様の構成でかつ大きさが等しい２つの発電要素７１Ａ，７１Ｂの一部を積層させ、互いにずらした状態で発電要素群７２を構成したものである。各発電要素７１Ａ，７１Ｂからは正極および負極の各リード片７３，７４が互いに反対側に位置するように導出されている。また、図１１に示すように、発電要素７１Ａの負極リード片７４Ａと発電要素７１Ｂの負極リード片７４Ｂとが、厚み方向において互いに同位置となるように配置されている。これらの負極リード片７４Ａ，７４Ｂは、互いに近づく方向に屈曲されており、電池ケース８０の内部で溶接によって電気的に接続されるとともに、一方の負極リード片７４Ａだけが電池ケース８０の外部まで導出されている。また、各正極リード片７３Ａ，７３Ｂはそれぞれ電池ケース８０の外部に導出され、外部で接続される構成となっている。
なお、本実施形態においても、上記実施形態と同様に各発電要素７１Ａ，７１Ｂ間のくびれ部分７６に電池ケース８０が密着しており、上記実施形態と同様の作用効果が得られる。
【００２６】
＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
【００２７】
（１）非水電解質電池の発電要素群を構成する各発電要素の並べ方或いは個数は、上記実施形態に限定されるものではなく、必要に応じて変更可能である。また、各発電要素の電気的な接続の形態（直列あるいは並列）や接続位置も、上記実施形態に限定されるものではない。
【００２８】
【発明の効果】
以上のように、本発明によれば、リード片の切断が起こり難い耐衝撃に優れる非水電解質電池を得ることができるという優れた効果を奏する。
【図面の簡単な説明】
【図１】本発明の第１実施形態にかかる非水電解質電池の分解斜視図
【図２】同じく完成形態の斜視図
【図３】同じく図２のＡ−Ａ断面図
【図４】同じく図２のＢ−Ｂ断面図
【図５】本発明の第２実施形態にかかる非水電解質電池の斜視図
【図６】同じく図５のＡ−Ａ断面図
【図７】同じく図５のＢ−Ｂ断面図
【図８】本発明の第３実施形態にかかる非水電解質電池の斜視図
【図９】本発明の第４実施形態にかかる非水電解質電池の斜視図
【図１０】同じく図９のＡ−Ａ断面図
【図１１】同じく図９のＢ−Ｂ断面図
【符号の説明】
１０，３０，５０，７０…非水電解質電池
１１，３１，５１，７１…発電要素
１２，３２，５２，７２…発電要素群
１３，３３，５３，７３…正極リード片
１４，３４，５４，７４…負極リード片
１６，３６，５６，７６…くびれ部分
２０，４０，６０，８０…電池ケース
２１…樹脂フィルム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nonaqueous electrolyte battery in which a battery case is formed of a resin film.
[0002]
[Prior art]
In recent years, the development of portable electronic devices has been remarkable, but there is an increasing demand for smaller and lighter batteries used in such portable electronic devices. As one means for reducing the weight of the battery, a battery using a flexible bag-shaped metal laminate case exterior body instead of a conventionally used container-shaped metal case has been studied. However, this type of battery is inferior in ability to press the power generation element housed in the case, and has a problem that it is difficult to prevent the power generation element from moving in the battery case. For this reason, when the battery is impacted by dropping or the like, the power generating element moves or deforms greatly in the battery case, and as a result, the lead piece led out from the power generating element is cut at the connection portion and the battery Could not function as.
[0003]
[Problems to be solved by the invention]
This invention is made | formed in view of the said situation, Comprising: In the nonaqueous electrolyte battery which formed the battery case with the resin film, it aims at improving the impact resistance.
[0004]
[Means for Solving the Problems]
The invention of claim 1 for solving the above-mentioned problem is that the wound power generation element is housed and sealed in a battery case formed of a resin film having flexibility. A plurality of the battery cases are accommodated in the battery case, and the resin film enters a constricted portion formed between the power generation elements, and is closely attached to the outer surface of the power generation element group .
[0005]
The invention according to claim 2 is the nonaqueous electrolyte battery according to claim 1, characterized in that at least a part between the power generation elements is bonded to each other with an adhesive.
[0006]
A third aspect of the invention is the nonaqueous electrolyte battery according to the first or second aspect, characterized in that the power generation element and the resin film are bonded together with an adhesive.
[0007]
The invention according to claim 4 is the nonaqueous electrolyte battery according to any one of claims 1 to 3, wherein the lead piece led out from the power generation element is electrically connected in the battery case. Has characteristics.
[0008]
Further, the invention of claim 5 is the nonaqueous electrolyte battery according to any one of claims 1 to 4, wherein the battery case is formed by laminating and adhering edge portions of the resin film to each other. The lead pieces led out from the power generation element are led out to the outside of the battery case through the resin films of the laminated portion of the resin film, and the lead pieces are the lead pieces of the resin film. It is characterized in that it is electrically connected to other power generating elements in the laminated portion.
[0009]
[Effects of the Invention]
Winding type power generation elements are more productive than conventional stacked types, but when they are arranged, the periphery of the power generation elements is rounded, so that a constricted portion is formed between each power generation element. . If there is such a constricted portion, when the power generating element is accommodated in the battery case, a large space is generated between the constricted portion between the power generating elements and the battery case, and the battery case is particularly flexible. When the battery is formed, the power generation element moves greatly in the battery case when the battery receives an impact.
[0010]
Therefore, in the first aspect of the invention, as described above, the resin film is in close contact so as to enter the constricted portion formed between the power generation elements. In this way, since there is no extra space between the battery case and the power generation element, even if the battery is subjected to an impact such as dropping, the power generation element moves greatly within the battery case or is displaced from each other. Large deformation is prevented. Therefore, the lead piece led out from the power generation element can be prevented from being cut off at the connection portion, and an excellent effect is obtained that a nonaqueous electrolyte battery excellent in impact resistance can be obtained.
[0011]
In addition, according to the invention of claim 2, since at least a part between the respective wound power generation elements is fixed to each other by the adhesive, each power generation element is more difficult to shift even when an impact is applied to the battery. Impact resistance is further improved.
[0012]
According to the invention of claim 3, since the power generation element and the resin film are fixed by the adhesive, the power generation element and the battery case are hardly displaced even when an impact is applied to the battery, and the impact resistance is improved. To do.
[0013]
According to the invention of claim 4 and claim 5, the connecting portion of each lead piece is less likely to break compared to the case where the connecting portion of the lead piece between each power generating element is exposed to the outside of the battery case. In addition, there is an effect that it is difficult to receive corrosion such as oxidation.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is an exploded perspective view of a nonaqueous electrolyte battery 10 according to the present embodiment. The nonaqueous electrolyte battery 10 includes, for example, a power generation element group 12 configured by laminating three flat power generation elements 11A, 11B, and 11C in which a positive electrode and a negative electrode are wound via a separator, and an electrolyte salt. The contained non-aqueous electrolyte solution (not shown) is accommodated in a battery case 20 made of a metal laminate resin film having flexibility. A constricted portion 16 is formed at the peripheral edge in the length direction between the power generation elements 11A, 11B, and 11C.
[0015]
As described above, the power generation element group 12 includes the three power generation elements 11A, 11B, and 11C. As shown in FIG. 1, the length of the power generation element 11B located at the center is the power generation elements 11A, 11A, While being configured to be longer than the length of 11C, the width is configured to be substantially equal. In addition, the power generation elements 11A, 11B, and 11C each have a laminated portion that is fixed by an adhesive (not shown), and the laminated state is firmly held. Further, from each of the power generation elements 11A, 11B, and 11C, positive electrode lead pieces 13A, 13B, and 13C made of a metal conductor such as copper, aluminum, and nickel having a thickness of 50 to 100 μm that are electrically connected to the respective positive electrodes and negative electrodes, and The negative electrode lead pieces 14A, 14B, and 14C are led out on one side. The positive electrode lead pieces 13A and 13C and the negative electrode lead pieces 14A and 14C of the power generation elements 11A and 11C are bent upward so as to extend along the outer surface of the power generation element 11B. These lead pieces 13B and 14B are electrically connected to the bases.
[0016]
Further, an adhesive layer having a thickness of 50 μm made of acid-modified polyethylene is provided on both sides in the vicinity of the center in the length direction of the positive electrode lead piece 13B and the negative electrode lead piece 14B of the power generation element 11B, and as an electrolyte solution barrier layer on the outside thereof. A 70 μm Eval resin (Kuraray ethylene vinyl alcohol copolymer resin) layer is provided (none shown).
[0017]
On the other hand, the battery case 20 is formed by laminating an aluminum foil 22 having a thickness of 9 μm as a barrier layer on the inner surface side of a polyethylene terephthalate (PET) film 21 having a thickness of 12 μm with a urethane-based adhesive. On the inner surface of 22, an acid-modified polyethylene (PE) layer having a thickness of 100 μm is provided as a heat welding layer 23. In addition, 24 and 25 in FIG. 1 have shown the heat welding part.
[0018]
The nonaqueous electrolyte battery 10 of this embodiment is completed as follows. That is, first, the power generation element group 12 and a non-aqueous electrolyte (not shown) are accommodated in the battery case 20, and the opening 26 is overlapped with the positive electrode lead piece 13B and the negative electrode lead piece 14B interposed therebetween. close up. At this time, the tip portions of the positive electrode lead piece 13 </ b> B and the negative electrode lead piece 14 </ b> B are in a state of being led out from the battery case 20. Then, after the inside of the battery case 20 is depressurized, the heat welding layer 23 is melted by heating the whole so that the power generating element 11 and the battery case 20 are welded and the opening 26 is welded and sealed. At this time, a pressing jig may be used in combination as necessary.
[0019]
2 to 4 are views showing a completed form of the nonaqueous electrolyte battery 10 of the present embodiment in which the power generating element group 12 and the nonaqueous electrolyte are accommodated in the battery case 20. FIG. 2 is a perspective view thereof. As shown in FIG. 2, the battery case 20 has a shape that closely follows the outer surface of the power generation element group 12 accommodated therein. In particular, the power generating elements 11A, 11B, and 11C are also in close contact with the constricted portion 16, thereby creating an extra space inside the battery case 20 as shown in the cross-sectional views of FIGS. There is no configuration. Further, the inner surface of the battery case 20 and the outer surface of the power generation element group 12 are welded and fixed by the above-described heat welding layer 23.
[0020]
According to the nonaqueous electrolyte battery 10 of this embodiment, there is no extra space between the battery case 20 and the power generation element group 12, and between the power generation elements 11 and the power generation element group. 12 and the battery case 20 are fixed by an adhesive layer and a heat-welded layer 23, respectively. Therefore, even when an impact is applied to the battery due to dropping or the like, it is extremely difficult for the stacked state of the power generation elements 11 to collapse easily or the power generation element group 12 to move greatly in the battery case 20. There is an excellent effect that cutting of the piece can be prevented. Moreover, since each electric power generation element 11 is a winding type, it is excellent in productivity compared with the case where the conventional laminated type is used.
[0021]
Furthermore, since the connection portion between the lead pieces 13 and 14 of each power generation element 11 is accommodated in the battery case 20, the connection portion is more difficult to break and is less susceptible to corrosion such as oxidation.
[0022]
Second Embodiment
5 to 7 show a nonaqueous electrolyte battery 30 according to a second embodiment of the present invention. In the present embodiment, two power generation elements 31A and 31B having the same configuration and the same size as in the first embodiment are arranged side by side to form a power generation element group 32, and this power generation element group 32 and non-aqueous electrolysis (not shown) The liquid is hermetically housed in a battery case 40 having the same configuration as that of the first embodiment. The positive electrode lead piece 33A of the power generation element 31A is formed to be longer than the negative electrode lead piece 34A, and the positive electrode lead piece 33B of the power generation element 31B is formed to be shorter than the negative electrode lead piece 34B. The power generating elements 31A and 31B are electrically connected in series by welding the negative electrode lead piece 34A and the positive electrode lead piece 33B to, for example, the nickel plate 35. The nickel plate 35 is configured to be located in the sealing portion 41 of the battery case 40.
[0023]
Also in the nonaqueous electrolyte battery 30 of the present embodiment, the battery case 40 and the power generation element group 32 are brought into close contact with the constricted portion 36 between the power generation elements 31A and 31B, as in the first embodiment. In addition, there is no extra space between the power generation element group 32 and the battery case 40, and the lead piece is not damaged even when an impact is applied to the battery. Cutting can be prevented. Further, when the lead pieces are connected in the sealing portion 41 of the battery case 40 as in the present embodiment, the connection portion is not exposed to the air, and is not exposed to the electrolyte. It can be made less susceptible to corrosion.
[0024]
<Third Embodiment>
FIG. 8 shows a nonaqueous electrolyte battery 50 according to a third embodiment of the present invention. In the present embodiment, the power generation elements 51A and 51B are arranged side by side in the same manner as in the second embodiment to constitute the power generation element group 52, but the power generation elements 51A and 51B are electrically connected in parallel. However, this is different from the second embodiment. As shown in FIG. 8, both lead pieces 53 and 54 are led out from the power generation elements 51A and 51B so as to be located on the opposite sides, and both lead pieces 53A and 54A of the power generation element 51A are long. Both lead pieces 53B and 54B of the element 51B are configured to be short. The positive electrode lead pieces 53A and 53B and the negative electrode lead pieces 54A and 54B are electrically connected by a nickel plate 55 at the sealing portion 61 of the battery case 60, and both lead pieces 53A of the power generation element 51A are connected. , 53B are derived to the outside.
In the present embodiment as well, the battery case 60 is in close contact with the constricted portion 56 between the power generation elements 51A and 51B as in the above embodiment, and the same operational effects as in the above embodiment can be obtained.
[0025]
<Fourth embodiment>
9 to 11 show a nonaqueous electrolyte battery 70 according to a fourth embodiment of the present invention. In this embodiment, a part of two power generation elements 71A and 71B having the same configuration and the same size as those of the above embodiment are stacked, and the power generation element group 72 is configured in a state of being shifted from each other. The power generation elements 71A and 71B are led out so that the positive and negative lead pieces 73 and 74 are located on opposite sides. Further, as shown in FIG. 11, the negative electrode lead piece 74A of the power generation element 71A and the negative electrode lead piece 74B of the power generation element 71B are arranged at the same position in the thickness direction. These negative electrode lead pieces 74A and 74B are bent in a direction approaching each other, and are electrically connected by welding inside the battery case 80, and only one negative electrode lead piece 74A is led out to the outside of the battery case 80. Has been. The positive electrode lead pieces 73A and 73B are led out to the outside of the battery case 80 and connected to the outside.
In this embodiment as well, the battery case 80 is in close contact with the constricted portion 76 between the power generation elements 71A and 71B as in the above embodiment, and the same effects as in the above embodiment can be obtained.
[0026]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0027]
(1) The arrangement or number of the power generating elements constituting the power generating element group of the nonaqueous electrolyte battery is not limited to the above embodiment, and can be changed as necessary. Further, the form of electrical connection (series or parallel) and the connection position of each power generation element are not limited to the above embodiment.
[0028]
【The invention's effect】
As described above, according to the present invention, there is an excellent effect that it is possible to obtain a nonaqueous electrolyte battery excellent in impact resistance in which the cutting of the lead piece hardly occurs.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a nonaqueous electrolyte battery according to a first embodiment of the present invention. FIG. 2 is a perspective view of the completed form. FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a perspective view of the nonaqueous electrolyte battery according to the second embodiment of the present invention. FIG. 6 is a sectional view taken along the line AA in FIG. 5. FIG. FIG. 8 is a perspective view of a nonaqueous electrolyte battery according to a third embodiment of the present invention. FIG. 9 is a perspective view of a nonaqueous electrolyte battery according to a fourth embodiment of the present invention. AA sectional view of Fig. 11 [Fig. 11] BB sectional view of Fig. 9 [Explanation of symbols]
10, 30, 50, 70 ... non-aqueous electrolyte batteries 11, 31, 51, 71 ... power generation elements 12, 32, 52, 72 ... power generation element groups 13, 33, 53, 73 ... positive electrode lead pieces 14, 34, 54, 74 ... Negative electrode lead pieces 16, 36, 56, 76 ... Constricted portions 20, 40, 60, 80 ... Battery case 21 ... Resin film

Claims (5)

可撓性を有する樹脂フィルムにて形成した電池ケース内に巻回型の発電要素を収容して密閉してなるものにおいて、前記発電要素を前記電池ケース内に複数個収容し、前記樹脂フィルムが前記発電要素間に形成されるくびれ部分に入り込み、前記発電要素群の外面にぴったり沿う形状で密着させたことを特徴とする非水電解質電池。In a battery case in which a wound type power generation element is accommodated and sealed in a battery case formed of a flexible resin film, a plurality of the power generation elements are accommodated in the battery case, and the resin film A nonaqueous electrolyte battery characterized in that it enters into a constricted portion formed between the power generation elements and is closely adhered to a shape along the outer surface of the power generation element group . 前記各発電要素間の少なくとも一部が接着剤により相互に接着されていることを特徴とする請求項１に記載の非水電解質電池。  The nonaqueous electrolyte battery according to claim 1, wherein at least a part between the power generation elements is bonded to each other with an adhesive. 前記発電要素と前記樹脂フィルムとが接着剤により接着されていることを特徴とする請求項１または２に記載の非水電解質電池。  The non-aqueous electrolyte battery according to claim 1, wherein the power generation element and the resin film are bonded with an adhesive. 前記発電要素から導出されたリード片が前記電池ケース内において電気的に接続されていることを特徴とする請求項１ないし３のいずれかに記載の非水電解質電池。  The nonaqueous electrolyte battery according to any one of claims 1 to 3, wherein a lead piece led out from the power generation element is electrically connected in the battery case. 前記電池ケースは、前記樹脂フィルムの端縁部を互いに積層して接着することによって封口されると共に、前記発電要素から導出されたリード片が前記樹脂フィルムの前記積層部分の前記樹脂フィルム間を通って前記電池ケース外に導出され、かつ、それらのリード片は前記樹脂フィルムの前記積層部分内で他の発電要素との間で電気的に接続されていることを特徴とする請求項１ないし請求項４のいずれかに記載の非水電解質電池。  The battery case is sealed by laminating and adhering the edge portions of the resin film to each other, and lead pieces led out from the power generation element pass between the resin films in the laminated portion of the resin film. The lead pieces are led out of the battery case, and the lead pieces are electrically connected to other power generating elements in the laminated portion of the resin film. Item 5. The nonaqueous electrolyte battery according to any one of Items 4 to 5.
JP2002032104A 2002-02-08 2002-02-08 Non-aqueous electrolyte battery Expired - Fee Related JP3680797B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002032104A JP3680797B2 (en) 2002-02-08 2002-02-08 Non-aqueous electrolyte battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002032104A JP3680797B2 (en) 2002-02-08 2002-02-08 Non-aqueous electrolyte battery

Publications (2)

Publication Number Publication Date
JP2003234094A JP2003234094A (en) 2003-08-22
JP3680797B2 true JP3680797B2 (en) 2005-08-10

Family

ID=27775316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002032104A Expired - Fee Related JP3680797B2 (en) 2002-02-08 2002-02-08 Non-aqueous electrolyte battery

Country Status (1)

Country Link
JP (1) JP3680797B2 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7736803B2 (en) 2007-08-15 2010-06-15 Sony Corporation Non-aqueous electrolyte secondary battery
KR101385732B1 (en) 2012-11-22 2014-04-17 주식회사 엘지화학 Electrode assembly composed of electrode units with equal lengths and different widths, battery cell and device including the same
KR101387424B1 (en) 2012-11-22 2014-04-25 주식회사 엘지화학 Electrode assembly composed of electrode units with equal widths and different lengths, battery cell and device including the same
KR20140062445A (en) * 2012-03-20 2014-05-23 주식회사 엘지화학 Electrode assembly and composite electrode assembly of stair-like structure
KR101414092B1 (en) 2013-02-08 2014-07-04 주식회사 엘지화학 Stepwise Electrode Assembly, Secondary Battery, Battery Pack and Devide comprising the Stepwise Electrode Assembly, and Method for preparing the Stepwise Electrode Assembly
KR20140102387A (en) * 2013-02-13 2014-08-22 주식회사 엘지화학 Battery Cell Having Electrode Assembly Of Staggered Array Structure
KR20150031845A (en) * 2013-09-17 2015-03-25 주식회사 엘지화학 Battery Cell Having Electrode Assembly of Steps-Formed Structure
KR101538272B1 (en) * 2014-01-06 2015-07-22 주식회사 엘지화학 Stepped battery, method for manufacturing the same, and device thereof
US9196898B2 (en) 2012-11-13 2015-11-24 Lg Chem, Ltd. Stepped electrode assembly
JP2015534226A (en) * 2013-07-08 2015-11-26 エルジー・ケム・リミテッド Electrode assembly, battery and device including the same
KR101572832B1 (en) 2013-02-15 2015-12-01 주식회사 엘지화학 Stepped Electrode Group Stack
KR101572836B1 (en) * 2013-03-04 2015-12-01 주식회사 엘지화학 Battery Cell Having Structure of Steps-Formed
US9225034B2 (en) 2012-05-29 2015-12-29 Lg Chem, Ltd. Stepwise electrode assembly having variously-shaped corner and secondary battery, battery pack and device comprising the same
US9300006B2 (en) 2012-04-05 2016-03-29 Lg Chem, Ltd. Battery cell of stair-like structure
US9299988B2 (en) 2012-11-21 2016-03-29 Lg Chem, Ltd. Electrode sheet including notching portion
US9318733B2 (en) 2012-12-27 2016-04-19 Lg Chem, Ltd. Electrode assembly of stair-like structure
KR101620173B1 (en) * 2013-07-10 2016-05-13 주식회사 엘지화학 A stepwise electrode assembly with good stability and the method thereof
US9478773B2 (en) 2012-03-16 2016-10-25 Lg Chem, Ltd. Battery cell of asymmetric structure and battery pack employed with the same
US9484560B2 (en) 2013-02-13 2016-11-01 Lg Chem, Ltd. Electric device having a round corner and including a secondary battery
US9620789B2 (en) 2012-03-08 2017-04-11 Lg Chem, Ltd. Battery pack of the stair-like structure
US9786874B2 (en) 2013-03-08 2017-10-10 Lg Chem, Ltd. Electrode having round corner
KR101800932B1 (en) * 2015-03-16 2017-11-23 주식회사 엘지화학 Stepped battery
US9954203B2 (en) 2013-03-08 2018-04-24 Lg Chem, Ltd. Stepped electrode group stack
WO2018154987A1 (en) * 2017-02-22 2018-08-30 株式会社村田製作所 Secondary battery and method for producing same
WO2021195917A1 (en) * 2020-03-31 2021-10-07 宁德新能源科技有限公司 Cell, battery, and electronic device

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008135374A (en) * 2006-10-24 2008-06-12 Matsushita Electric Ind Co Ltd Sealed secondary battery
KR100870355B1 (en) * 2007-07-19 2008-11-25 삼성에스디아이 주식회사 Pouch type battery pack
US8940429B2 (en) 2010-07-16 2015-01-27 Apple Inc. Construction of non-rectangular batteries
KR20130103286A (en) * 2012-03-08 2013-09-23 주식회사 엘지화학 Battery pack of stair-like structure
KR101192619B1 (en) * 2012-03-23 2012-10-18 주식회사 엘지화학 Battery case
US9716253B2 (en) 2012-03-23 2017-07-25 Lg Chem, Ltd. Battery case for secondary battery
WO2013152149A1 (en) * 2012-04-05 2013-10-10 A123 Systems, Inc. The lithium ion prismatic cell comprising multiple jelly rolls with additional material between jelly rolls
KR101502763B1 (en) * 2012-12-27 2015-03-23 주식회사 엘지화학 Electrode Assembly of Stair-like Structure
KR20140100032A (en) 2013-02-05 2014-08-14 주식회사 엘지화학 Battery Cell Having Structure of Steps-Formed
DE102013202367B4 (en) 2013-02-14 2024-04-04 Robert Bosch Gmbh Energy storage module with a module housing formed by a film and several storage cells each arranged in a receiving pocket of the module housing, as well as energy storage and motor vehicle
KR101462043B1 (en) * 2013-03-04 2014-11-18 주식회사 엘지화학 Battery Cell Having Electrode Assembly of Stair-like Structure
KR101526457B1 (en) * 2013-03-08 2015-06-08 주식회사 엘지화학 Electrode Having Round Corner
KR101606752B1 (en) * 2013-10-07 2016-03-28 주식회사 엘지화학 Method for Production of Jelly-Roll Type Electrode Assembly of Steps-Formed Structure
KR102211366B1 (en) * 2013-10-30 2021-02-03 삼성에스디아이 주식회사 Rechargeable Battery
US11830971B2 (en) * 2015-06-04 2023-11-28 Lg Energy Solution, Ltd. Battery cell, and battery module and battery pack including same
US9929393B2 (en) 2015-09-30 2018-03-27 Apple Inc. Wound battery cells with notches accommodating electrode connections
JP2017073209A (en) * 2015-10-05 2017-04-13 昭和電工株式会社 Power storage device
US10868290B2 (en) 2016-02-26 2020-12-15 Apple Inc. Lithium-metal batteries having improved dimensional stability and methods of manufacture
JPWO2017169843A1 (en) * 2016-03-28 2018-11-01 株式会社村田製作所 Electric storage device and manufacturing method thereof
JP2021177444A (en) * 2018-07-23 2021-11-11 昭和電工マテリアルズ株式会社 Device for manufacturing secondary battery and method for manufacturing secondary battery

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7736803B2 (en) 2007-08-15 2010-06-15 Sony Corporation Non-aqueous electrolyte secondary battery
US9620789B2 (en) 2012-03-08 2017-04-11 Lg Chem, Ltd. Battery pack of the stair-like structure
US9478773B2 (en) 2012-03-16 2016-10-25 Lg Chem, Ltd. Battery cell of asymmetric structure and battery pack employed with the same
US9252452B2 (en) 2012-03-20 2016-02-02 Lg Chem, Ltd. Electrode assembly and composite electrode assembly of stair-like structure
KR101596273B1 (en) * 2012-03-20 2016-02-22 주식회사 엘지화학 Electrode Assembly and Composite Electrode Assembly of Stair-like Structure
KR20140062445A (en) * 2012-03-20 2014-05-23 주식회사 엘지화학 Electrode assembly and composite electrode assembly of stair-like structure
KR101572838B1 (en) * 2012-03-20 2015-12-01 주식회사 엘지화학 Electrode Assembly and Composite Electrode Assembly of Stair-like Structure
US9300006B2 (en) 2012-04-05 2016-03-29 Lg Chem, Ltd. Battery cell of stair-like structure
US9548517B2 (en) 2012-04-05 2017-01-17 Lg Chem, Ltd. Battery cell of stair-like structure
US9225034B2 (en) 2012-05-29 2015-12-29 Lg Chem, Ltd. Stepwise electrode assembly having variously-shaped corner and secondary battery, battery pack and device comprising the same
US9685679B2 (en) 2012-05-29 2017-06-20 Lg Chem, Ltd. Stepwise electrode assembly having variously-shaped corner and secondary battery, battery pack and device comprising the same
US10128526B2 (en) 2012-11-09 2018-11-13 Lg Chem, Ltd. Electrode assembly having step, secondary battery, battery pack and device including electrode assembly, and method of manufacturing electrode assembly
US10923758B2 (en) 2012-11-09 2021-02-16 Lg Chem, Ltd. Electrode assembly having step, secondary battery, battery pack and device including electrode assembly, and method of manufacturing electrode assembly
US9196898B2 (en) 2012-11-13 2015-11-24 Lg Chem, Ltd. Stepped electrode assembly
US10026994B2 (en) 2012-11-13 2018-07-17 Lg Chem, Ltd. Stepped electrode assembly
US9299988B2 (en) 2012-11-21 2016-03-29 Lg Chem, Ltd. Electrode sheet including notching portion
US9231279B2 (en) 2012-11-22 2016-01-05 Lg Chem, Ltd. Electrode assembly including electrode units having the same length and different widths, and battery cell and device including the electrode assembly
KR101385732B1 (en) 2012-11-22 2014-04-17 주식회사 엘지화학 Electrode assembly composed of electrode units with equal lengths and different widths, battery cell and device including the same
KR101387424B1 (en) 2012-11-22 2014-04-25 주식회사 엘지화학 Electrode assembly composed of electrode units with equal widths and different lengths, battery cell and device including the same
US9318733B2 (en) 2012-12-27 2016-04-19 Lg Chem, Ltd. Electrode assembly of stair-like structure
US10115996B2 (en) 2013-02-08 2018-10-30 Lg Chem, Ltd. Stepped electrode assembly, secondary battery including the electrode assembly, and method of manufacturing the electrode assembly
KR101414092B1 (en) 2013-02-08 2014-07-04 주식회사 엘지화학 Stepwise Electrode Assembly, Secondary Battery, Battery Pack and Devide comprising the Stepwise Electrode Assembly, and Method for preparing the Stepwise Electrode Assembly
US9484560B2 (en) 2013-02-13 2016-11-01 Lg Chem, Ltd. Electric device having a round corner and including a secondary battery
US10319952B2 (en) 2013-02-13 2019-06-11 Lg Chem, Ltd. Battery cell having electrode assembly of staggered array structure
KR101586201B1 (en) * 2013-02-13 2016-01-20 주식회사 엘지화학 Battery Cell Having Electrode Assembly Of Staggered Array Structure
KR20140102387A (en) * 2013-02-13 2014-08-22 주식회사 엘지화학 Battery Cell Having Electrode Assembly Of Staggered Array Structure
US9935329B2 (en) 2013-02-15 2018-04-03 Lg Chem, Ltd. Stepped electrode group stack
KR101572832B1 (en) 2013-02-15 2015-12-01 주식회사 엘지화학 Stepped Electrode Group Stack
JP2016517610A (en) * 2013-03-04 2016-06-16 エルジー・ケム・リミテッド Battery cell including step structure
KR101572836B1 (en) * 2013-03-04 2015-12-01 주식회사 엘지화학 Battery Cell Having Structure of Steps-Formed
US10629940B2 (en) 2013-03-04 2020-04-21 Lg Chem, Ltd. Battery cell including stepped structure
US9954203B2 (en) 2013-03-08 2018-04-24 Lg Chem, Ltd. Stepped electrode group stack
US9786874B2 (en) 2013-03-08 2017-10-10 Lg Chem, Ltd. Electrode having round corner
US9325032B2 (en) 2013-07-08 2016-04-26 Lg Chem, Ltd. Electrode assembly, battery and device including the same
JP2015534226A (en) * 2013-07-08 2015-11-26 エルジー・ケム・リミテッド Electrode assembly, battery and device including the same
KR101620173B1 (en) * 2013-07-10 2016-05-13 주식회사 엘지화학 A stepwise electrode assembly with good stability and the method thereof
US9608294B2 (en) 2013-07-10 2017-03-28 Lg Chem, Ltd. Electrode assembly having step portion in stabilized stacking and method of manufacturing the same
KR101675939B1 (en) 2013-09-17 2016-11-14 주식회사 엘지화학 Battery Cell Having Electrode Assembly of Steps-Formed Structure
KR20150031845A (en) * 2013-09-17 2015-03-25 주식회사 엘지화학 Battery Cell Having Electrode Assembly of Steps-Formed Structure
US9882233B2 (en) 2014-01-06 2018-01-30 Lg Chem, Ltd. Stepped battery and method and device for manufacturing the same
KR101538272B1 (en) * 2014-01-06 2015-07-22 주식회사 엘지화학 Stepped battery, method for manufacturing the same, and device thereof
KR101800932B1 (en) * 2015-03-16 2017-11-23 주식회사 엘지화학 Stepped battery
WO2018154987A1 (en) * 2017-02-22 2018-08-30 株式会社村田製作所 Secondary battery and method for producing same
WO2021195917A1 (en) * 2020-03-31 2021-10-07 宁德新能源科技有限公司 Cell, battery, and electronic device

Also Published As

Publication number Publication date
JP2003234094A (en) 2003-08-22

Similar Documents

Publication Publication Date Title
JP3680797B2 (en) Non-aqueous electrolyte battery
JP4428905B2 (en) Flat battery and battery pack using the same
JP5395749B2 (en) Secondary battery
JP5495192B2 (en) Film exterior electrical device and battery pack
KR101216422B1 (en) Secondary Battery Having Sealing Portion of Improved Insulating Property
JP6247766B2 (en) Pouch type secondary battery and manufacturing method thereof
JP6253108B2 (en) Battery pack
KR101106428B1 (en) Secondary battery
JP6743664B2 (en) Power storage device and method of manufacturing power storage device
JP2009181898A (en) Laminated battery, and manufacturing method thereof
JP4784687B2 (en) Flat battery and battery pack using the same
EP3007248A1 (en) Battery module
KR20080022915A (en) Pouch for secondary battery
JP2020518963A (en) Electrode assembly including a plastic member applied to an electrode tab lead joint and a secondary battery including the same
JPWO2013031937A1 (en) Lithium ion secondary battery
JP2006079909A (en) Power storage module and manufacturing method of the same
JP2009224102A (en) Flat battery
JP5098350B2 (en) battery
JP6016031B2 (en) Power storage module
JP6580406B2 (en) Power storage device
JP2004031194A (en) Laminated cells and battery pack
JP2008091268A (en) Low-profile battery
JP3775356B2 (en) Laminated and assembled batteries
JP2019091563A (en) Power storage element
JP5787353B2 (en) Non-aqueous electrolyte secondary battery

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040427

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20041116

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050107

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050426

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050509

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees