JP2010507898A - 優れた安全性を発揮する電気化学素子 - Google Patents
優れた安全性を発揮する電気化学素子 Download PDFInfo
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- JP2010507898A JP2010507898A JP2009534487A JP2009534487A JP2010507898A JP 2010507898 A JP2010507898 A JP 2010507898A JP 2009534487 A JP2009534487 A JP 2009534487A JP 2009534487 A JP2009534487 A JP 2009534487A JP 2010507898 A JP2010507898 A JP 2010507898A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
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Abstract
このために、本発明によるセンターピン組立体は、2つ以上のエンボス形態の突出部が形成されている板状基材、又は所定形態の2つ以上の不連続な破断線が形成されている板状基材を、管状に巻回して製造されるセンターピン;及び、前記センターピン内の空間に具備されている容器であって、素子の安全性を向上できる物質をその内部に受容する容器を備える。
Description
(a)2つ以上のエンボス形態の突出部が形成されている板状基材、又は所定形態の2つ以上の不連続な破断線が形成されている板状基材を、管状に巻回して製造されるセンターピン;及び、
(b)前記センターピン内の空間に具備される容器であって、素子の安全性を向上できる物質をその内部に受容する容器を備えることを特徴とする。
本発明によるセンターピンは、2つ以上のエンボス形態の突出部が形成されている板状基材、又は所定形態の2つ以上の不連続な破断線が形成されている板状基材を巻回して製造されるもので、その製造工程が簡単であり、板状基材を巻回すると、中空円筒管が形成される(図2参照)。このようなセンターピンは、後述するように、外部から圧着やショックなどのような物理的な衝撃が加えられる時、電気化学素子の安全性を確保できる。
本発明は、前記センターピン内の空間に密閉容器を備え、前記容器内に電気化学素子の安全性を向上できる物質を受容することを特徴とする。
1: 負極, 2: 正極, 3: 分離膜,
4: 絶縁板, 5: 電池缶, 6: 封合ガスケット,
7: キャップ, 8: 安全弁装置, 9: PCT素子,
10: 負極集電体, 11: 正極集電体, 12: 負極タブ,
13: 正極 タブ, 14: センターピン組立体
Claims (27)
- 巻回型電極組立体がケース内に受納された電気化学素子における、巻回中心に挿入されるセンターピン組立体であって、
2つ以上のエンボス形態の突出部が形成されている板状基材、又は所定形態の2つ以上の不連続な破断線が形成されている板状基材を、管状に巻回して製造されるセンターピンと、及び、
前記センターピン内の空間に具備されている容器を備えてなることを特徴とするものであり、
前記容器が、素子の安全性を向上できる物質をその内部に受容するものである、センターピン組立体。 - 前記破断線が形成されている板状基材を管状に巻回する時又はその以前に、前記破断線の境界部にある板状基材の一部が突出部を形成することを特徴とする、請求項1に記載のセンターピン組立体。
- 前記管状に巻回した板状基材において軸方向に向かい合う2つの対辺が、重畳しないように互いに接触又は離隔されて向かい合うことを特徴とする、請求項1に記載のセンターピン組立体。
- 前記管状に巻回した板状基材において軸方向に向かい合う2つの対辺が、外部から所定以上の圧力が加えられる時、その端部が突出されて隣接(たち)している部材を各対辺に対応するように一直線上に破裂させることを特徴とする、請求項1に記載のセンターピン組立体。
- 前記容器が、
中空円筒管と、
高分子からなり、前記中空円筒管の一端を密閉する第1の部材と、及び、
高分子又は金属からなり、前記中空円筒管の他端を密閉する第2の部材を備えてなることを特徴とする、請求項1に記載のセンターピン組立体。 - 前記電気化学素子の正常作動温度より高い温度又は4.3V以上の電圧において、前記第1の部材、又は第1の部材と第2の部材ともが溶融されることを特徴とする、請求項5に記載のセンターピン組立体。
- 中空円筒管の2つ以上が高分子により上下に連結している管と、
前記上下に連結している管の一端を密閉する第3の部材と、及び、
前記上下に連結している管の他端を密閉する第4の部材を備えてなることを特徴とする、請求項1に記載のセンターピン組立体。 - 前記電気化学素子の正常作動温度より高い温度又は4.3V以上の電圧において、前記2つ以上の中空円筒管を連結している高分子が溶融されることを特徴とする、請求項7に記載のセンターピン組立体。
- 表面に1つ以上の開口部を有し、両端が密閉された中空円筒管と、及び、
前記開口部を密閉する高分子部材を備えることを特徴とする、請求項1に記載のセンターピン組立体。 - 前記電気化学素子の正常作動温度より高い温度又は4.3V以上の電圧において、前記高分子部材が溶融されることを特徴とする、請求項9に記載のセンターピン組立体。
- 前記電気化学素子の正常作動温度より高い温度が、70〜200℃であることを特徴とする、請求項6、8又は10に記載のセンターピン組立体。
- 前記第1の部材をなす高分子、前記第2の部材をなす高分子、前記2つ以上の中空円筒管を連結している高分子、及び前記開口部を密閉する高分子部材が、それぞれシリコン樹脂、アクリル樹脂、ウレタン樹脂、エポキシ樹脂、ゴム、ポリエチレン、ポリプロピレン、ポリブテン、ポリアセトアルデヒド、ポリホルムアルデヒド、ポリプロピレンオキサイド、ポリメチルメタクリレート、ポリ塩化ビニリデン、ポリフッ化ビニル及びポリフッ化ビニリデンから群より選択される一1種以上のものであることを特徴とする、請求項5、7又は9に記載のセンターピン組立体。
- 前記素子の安全性を向上できる物質が、ガス又はガス発生化合物であることを特徴とする、請求項1に記載のセンターピン組立体。
- 前記素子の安全性を向上できる物質が、Al2(SO4)3、Ca(OH)2、Mg(NO3)2、PbI2、NaCl、MgCl2及びAl2(OH)3からなる群より1種以上選ばれるイオン性塩であることを特徴とする、請求項1に記載のセンターピン組立体。
- 前記素子の安全性を向上できる物質が、超低温性液体、昇華性物質又はこれらの混合物であることを特徴とする、請求項1に記載のセンターピン組立体。
- 前記エンボス形態の突出部又は破断線により形成される突出部が、センターピンの内周面、外周面又は両方に形成されることを特徴とする、請求項1に記載のセンターピン組立体。
- 前記エンボス形態の突出部又は破断線により形成される突出部が、板状基材の全面に均一に分布されていることを特徴とする、請求項1に記載のセンターピン組立体。
- 第1の分離膜、第1の電極タブが具備された第1の電極板、第2の分離膜及び第2の電極タブが具備された第2の電極板が積層された後、巻回された巻回型電極組立体がケース内に受納される電気化学素子において、
請求項1〜17の何れか一項に記載のセンターピン組立体が巻回型電極組立体の巻回中心に挿入されることを特徴とする、電気化学素子。 - 前記センターピン組立体が、エンボス形態の突出部又は破断線により形成された突出部がセンターピンの外周面に形成されており、電極端子と絶縁されており、
外部から所定以上の圧力が加えられる時、前記エンボス形態の突出部又は破断線により形成される突出部により、第1の分離膜、第1の電極板及び第2の分離膜を破裂させることで、1つ以上の短絡を意図的に発生させることを特徴とする、請求項18に記載の電気化学素子。 - 前記センターピン組立体が、エンボス形態の突出部又は破断線により形成される突出部がセンターピンの外周面に形成されており、電気伝導性を有する材質からなり、第2の電極板に具備された第2の電極タブと電気的に連結しており、
通常はセンターピン組立体が第1の分離膜により第1の電極板と絶縁されていて、外部から所定以上の圧力が加えられる時、前記突出部により前記第1の分離膜を破裂させることで、1つ以上の短絡を意図的に発生させることを特徴とする、請求項18に記載の電気化学素子。 - 素子の安全性を向上できる物質が、ガス又はガス発生化合物であり、
素子内の圧力変化を感知して素子作動を中止させたり、素子内の異常な条件を早期に正常に変化させることができる安全手段が素子内に具備されており、
前記容器から放出されるガス量が、素子内の圧力変化を感知する安全手段の作動が招来されることができる範囲であることを特徴とする、請求項18に記載の電気化学素子。 - 前記安全手段が、(i)素子内の圧力変化感知により素子の充電を中止させたり、充電状態を放電状態に転換させる第1の安全手段、及び、(ii)素子内の圧力変化感知により素子内の熱又はガスを発散させる第2の安全手段からなる群より選択される一種以上のものであることを特徴とする、請求項21に記載の電気化学素子。
- 前記第1の安全手段が、感圧素子を含むことを特徴とする、請求項22に記載の電気化学素子。
- 前記第1の安全手段が、
(i)感圧素子と、
(ii)前記感圧素子から伝えられた電流を伝達する導線と、及び、
(iii)前記導線を介して伝えられる電流に応じて、素子の充電を中止したり充電状態を放電状態に転換させる部材を備えてなることを特徴とする、請求項22に記載の電気化学素子。 - 前記第2の安全手段が、圧力開放バルブであることを特徴とする、請求項22に記載の電気化学素子。
- 前記電気化学素子が、素子の正常作動温度以上の温度範囲で容器から発生するガス噴出圧による体積膨脹及び素子内の圧力増加により、第1の安全手段、第2の安全手段、又は第1の安全手段と第2の安全手段ともが作動することを特徴とする、請求項22に記載の電気化学素子。
- 前記電気化学素子が、リチウム二次電池であることを特徴とする、請求項18に記載の電気化学素子。
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- 2007-10-22 TW TW096139456A patent/TWI374563B/zh active
- 2007-10-22 WO PCT/KR2007/005184 patent/WO2008050981A1/en active Application Filing
- 2007-10-22 CN CN2007800392877A patent/CN101529640B/zh active Active
- 2007-10-22 US US12/446,627 patent/US8039135B2/en active Active
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Cited By (5)
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JP2012221957A (ja) * | 2011-04-07 | 2012-11-12 | Samsung Sdi Co Ltd | 二次電池 |
JP2022027533A (ja) * | 2020-07-29 | 2022-02-10 | 輝能科技股▲分▼有限公司 | リチウム電池の熱暴走を抑制するための方法 |
US11682805B2 (en) | 2020-07-29 | 2023-06-20 | Prologium Technology Co., Ltd. | Thermal runaway suppression element and the related applications |
JP7399138B2 (ja) | 2020-07-29 | 2023-12-15 | 輝能科技股▲分▼有限公司 | リチウム電池の熱暴走を抑制するための方法 |
US12002920B2 (en) | 2020-07-29 | 2024-06-04 | Prologium Technology Co., Ltd. | Method for suppressing thermal runaway of lithium batteries |
Also Published As
Publication number | Publication date |
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TWI374563B (en) | 2012-10-11 |
CN101529640B (zh) | 2012-08-15 |
US8039135B2 (en) | 2011-10-18 |
US20100021801A1 (en) | 2010-01-28 |
JP5579438B2 (ja) | 2014-08-27 |
TW200841501A (en) | 2008-10-16 |
KR20080036462A (ko) | 2008-04-28 |
KR101058293B1 (ko) | 2011-08-22 |
CN101529640A (zh) | 2009-09-09 |
WO2008050981A1 (en) | 2008-05-02 |
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