TWI223904B - Battery separator - Google Patents

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TWI223904B
TWI223904B TW092118214A TW92118214A TWI223904B TW I223904 B TWI223904 B TW I223904B TW 092118214 A TW092118214 A TW 092118214A TW 92118214 A TW92118214 A TW 92118214A TW I223904 B TWI223904 B TW I223904B
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battery separator
patent application
film
scope
item
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TW092118214A
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TW200403877A (en
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Ronald W Call
Robert J Dees
Shizuo Ogura
Donald K Simmons
Xiang-Yun Wei
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Celgard Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403Manufacturing processes of separators, membranes or diaphragms
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403Manufacturing processes of separators, membranes or diaphragms
    • H01M50/406Moulding; Embossing; Cutting
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409Separators, membranes or diaphragms characterised by the material
    • H01M50/411Organic material
    • H01M50/414Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H01M50/417Polyolefins
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409Separators, membranes or diaphragms characterised by the material
    • H01M50/44Fibrous material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409Separators, membranes or diaphragms characterised by the material
    • H01M50/449Separators, membranes or diaphragms characterised by the material having a layered structure
    • H01M50/451Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463Separators, membranes or diaphragms characterised by their shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491Porosity
    • 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
    • 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49108Electric battery cell making

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Cell Separators (AREA)

Description

1223904 玫、發明說明: 相關之應用 本案係申請中之美國第09/614,號專利申請案(2_年 7月11日提出申請)之部份接續申請案。 【發明所屬之技術領域】 本發明係有關於一種具有改良之強度性質之蓄電池之分 隔器及其製造方法。 【先前技術】 在美國第09/484,184號專利申請案(2〇〇〇年!月18日提出 申請,在此併入本案,以為參考)之中,揭示使用一,,塌陷 之氣泡”之技術來製造之一蓄電池之分隔器。,,塌陷之氣泡,, 之技術係為人所知之薄膜擠製技術之一變化。在薄膜擠製 中’ ♦合物由一環形模子被擠壓而出,以形成一,,泡珠,,, 該泡沫被冷卻及塌陷,但該塌陷之泡沫並不能與其本身永 久性地黏合。請參見”塑膠工程技術手冊”(Berins·以丄及 所著’苐5版,199 1年紐約Chapman & Hall出版)之第1〇2頁 至105頁,在此併入本案,以為參考。在該,,塌陷之氣泡,,之 技術中,當該氣泡塌陷時,其設計係要與其本身永久性地 黏合。在上述之應用中,該被擠壓之聚合物係一共同擠壓 之水合物,換句洁說,係可形成二不同之層之二不同之聚 合物。
Celgardo2402及25 02平坦薄膜係使用一 ’’塌陷之氣泡,,之 技術而製成之產品。這些薄膜之相關特性被列於表2之中。 CelgarcP2400、2500及849平坦薄膜係使用一吹膜擠製技術 86338 ** 6 - 而製成之產品。這些薄膜之相關特性被列於表1及2之中 〇€4&^(1)2400及 25 00係類似於。€183『(^2402及 2 502,而後1 者係塌陷之氣泡之產品、且具有二倍於前二者之厚度。 在美國專利第5,565,281號之中,揭示一雙層之蓄電池分 隔器:一層具有高強度性質、另一層則有密封性質。分開 來製成之該二層被黏合在一起。 在美國專利第5,667,91 1號之中,揭示一,,橫跨層式,,之蓄 電池分隔器。在此分隔器中,具有單一軸向之指向 (uniaxially oriented)之數層被黏合在一起,以使它們能以偏 斜之方式來黏合在一起(每一層之單一軸向之指向之角度 係在20°至90。之間)。 在美國專利弟5,922,492號之中,揭示一合成之蓄電池分 隔器。此分隔器將不同材料連接在一起··一具微孔之薄膜 與一非織物經由層合而連接在一起。 在美國專利弟5,952,120號之中,揭示一三層之蓄電池分 隔|§ :具有二高強度層、而該二層將一密封層夾在其間。 【發明内容】 本發明係有關於一種蓄電池之分隔器。該蓄電池分隔器 包括一具微孔之薄膜,該薄膜具有一第一部分及一第二部 分’該第一部分被黏合於該第二部分。該黏合之強度係大 於5 g/in °該薄膜之厚度係小於17 miis,該薄膜之革利透 氣度係小於50 sec/1〇 cc,該薄膜之擊穿強度係大於4〇〇 g/mil 〇 【實施方式】 86338 本务明提供一具微孔蓄 部分,而該二部分被黏刀“ Γ分隔器具有二 壓而成之層所纽成,二二由Γ —非共同擠 本發明之擊穿強声大相_所構成。為使 ,就本發明而言二隔器(由多層所構成) ^_ —層被連接在一起時,其厚度係相等 月“支術之分隔器之厚度。本發明最好使用一塌陷之氣 泡之技術而製成’意即,一薄膜技術,其中一單一之溶化 :“物(或數種聚合物之混合物)由一環形模子被擠壓而 ’而由該模子擠壓而出之氣泡具有一第一部分及一第二 部分(每-部分大概代表該氣泡之周緣長度之一半),接下來 ’在形成具微孔之生成物(最好經由徐冷及拉緊)之前,該氣 泡會塌陷且黏合。當該氣泡由該模子被擠壓而出之時,其 方向係大致相同於該機器之方向。於是,當該氣泡塌陷而 黏合時’該第一及該第二部分係指向大致相同之方向(該二 部=間之偏斜角度係、小於15。);換句話說,該第一部分 ”》亥第一 #刀之夾角係很小(如美國專利第第1號 所揭示)。塌陷及黏合係、發生於同—步驟之中;在此步驟之 中,該氣泡之熔化(或大致熔化)之聚合物可牢固地黏合在一 起。經由將該氣泡塌陷及黏合,當具有相同於先前技術之 分隔器之厚度之時,增加之擊穿強度即可被達到。 就上述之技術而言,該第一及該第二部分係由相同之材 料所構成’當該二部分被黏合在—起日寺,即彳形成具微孔 之生成程序(例如,一徐冷及拉緊之程序)之一離型。一般來 說’材料係聚烯’最好係聚乙烯或聚丙聚或此二者之共聚 86338 1223904 物或此—者之混合物,最佳的材料係聚乙稀及聚丙稀。 在徐冷及拉緊之後’所製成之最終之分隔器係—呈微孔 之、核。此處所㈣”具微孔的,,係指如此之薄膜: 度係;:、於6G%且其孔之平均大小係在請5微米至1G微米Γ 間。取好’言亥薄膜之透氣度係在20%至60%之間且发孔之平 均大小係在⑽微米至5微米之間;最佳的是,其透氣度係 在规至观之間、而其孔之平均大小係在〇5微米至2微米 之間。
該分隔器之厚度係小於1.7 mil至 1.5 mils之間。 mils ;最好,其厚度係在〇.5 cc之空氣與122 in之 sec/10 cc。最好,其 的疋,其革利透氣度 使用ASTM-D 726來測量且使用1〇 水’該分隔器之革利透氣度係小於5〇 革利透氣度係小於45 sec/ 1 0 cc ;最佳 係小於35 sec/l〇 cc。 该分隔器之擊穿強度係由以下之方式來測量··在該最終 產品之寬度之方向上做10次測量,再將測量之1〇個數值加 鲁 以平均,所使用的是"Mitech Stevens LFRA織物分析器,,及 一針(其直徑係1.65 mm,而其數據記錄半徑係〇·5 mm,其 記錄速率為2 mm/sec,而最大偏向量為6 mm)。該分隔器之 擊穿強度係大於400 g/mil。 如上文所述,該薄膜係經由一塌陷之氣泡之技術而製成 ’而該技術係使用一 Celgard式之程序(擠壓、徐冷、拉緊) 。進一步之細節被揭示於以下之例子中。 在表I中,可購得之Celgard 849產品與本發明之三個例子 86338 作比較。所有的產品均 士八ns ★ η 、、、由相同之程序而製成,不同的是 本龟明之例子係使用齡古 之用車又阿之線速(line d 大致相同之厚度。 忧/…、有
在表II中,可購之Celgard 24〇〇、24〇2、25〇〇 及 25〇2 與本 發明之四個例子作比較。所有的產品均經由大致相同之程 -序而製成,不同的是本發明之例子係使用較高之線速,以 使其具有大致相同之厚度。
表II 識別號碼 2400 2402 2500 2502 ppl pp2 pp3 pp4· 樹脂 PP PP PP PP PP PP PP PP 薄膜 PP (單層) pp/pp PP (單層) pp/pp pp/pp pp/pp pp/pp pp/pp 厚度(mil) 1 2 1 2 1 1 0.68 0.65 革利透氣 度(sec/10 cc之空氣) 23-29 40-90 7-10 14-26 19-23 21-25 8-10 9-12 擊穿強度 (g/mil) 400-450 350-390 300-350 250-300 490-540 540-590 470-520 530-580 黏合之強 度(g/in) n/a n/a 5 >20 >20 >20 >20 86338 -10- 1223904 本發明包括其它型式,而這些型式仍被涵蓋於本發明之 精神及基本特性之中;於是本發明之範圍應由下列之申請 專利範圍所定義。 86338

Claims (1)

  1. 3曰 第0_|?118214號專利申請案 青專利範圍替換本(9'3年8月) 拾、申請專利範圍 1 · 一種蓄電池分隔器,包括: 一具微孔之薄膜,該薄膜具有 第一非共同擠製之部分;及 一第二非共同擠製之部分,該第一部分被黏合於該 第二部分,該黏合之強度係大於5 g/ln,該第_部分及 該第二部分係由相同之材料所構成且指向大致相同之 方向;及 该薄膜之厚度係小於1.5 mils, 該薄膜之革利透氣度係小於5〇sec/l〇cc,以及 該薄膜之擊穿強度係大於4〇〇 g/mil。 根據中請專利範圍第i項之f電池分隔器,其中該具微孔 之薄膜之透氣度係小於60%,而其孔之平均大小係在 〇·〇〇5微米至10微米之間。 根據申請專利範圍第2項之蓄電池分隔器,其中該薄膜之 透氣度係在20%至60%之間,而其孔之平均大小係在 微米至5微米之間。 根據申請專利範圍第3項之蓄電池分隔器,其令該薄膜之 透氣度係在30%至50%之間,而其孔之平均大小係在〇〇5 微米至2微米之間。 根據申請專利範圍第丨項之蓄電池分隔器,其中該厚度係 在 〇·5 mil至 1.5 mil之間。 根據申請專利範圍第1項之蓄電池分隔器,其中該革利透 氣度係小於45 sec/10 cc ° 1223904 7. 根據申請專利範圍第1項之蓄電池分隔器, 氣度係小於35 sec/10 cc。 8. 根據申請專利範圍第1項之蓄電池分隔器, 度係大於425 g/mil。 9. 根據申請專利範圍第1項之蓄電池分隔器, 一聚烯。 10. 根據申請專利範圍第9項之蓄電池分隔器, 由下列之群組來選擇:聚乙烯、聚丙烯, 物或此二者之混合物。 11. 根據申請專利範圍第1項之蓄電池分隔器, 強度係大於15 g/in。 12. 根據申請專利範圍第1項之蓄電池分隔器, 分及該第二部分係由一塌陷之氣泡所形成 其中該革利透 其中該擊穿強 其中該材料係 其中該聚烯可 此二者之共聚 其中該黏合之 其中該第一部
TW092118214A 2002-08-21 2003-07-03 Battery separator TWI223904B (en)

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EP (1) EP1418635A3 (zh)
JP (1) JP2004134391A (zh)
KR (1) KR100538519B1 (zh)
CN (1) CN1271729C (zh)
CA (1) CA2434353A1 (zh)
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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7989103B2 (en) * 2005-07-20 2011-08-02 Farasis Energy, Inc. Composite battery separator film and method of making same
US8795565B2 (en) * 2006-02-21 2014-08-05 Celgard Llc Biaxially oriented microporous membrane
EP2144961A1 (en) * 2007-04-27 2010-01-20 Dow Global Technologies Inc. Microporous films from compatibilized polymeric blends
KR101812535B1 (ko) * 2009-06-19 2017-12-27 도레이 카부시키가이샤 다층 미다공막
CA2887356A1 (en) 2012-10-08 2014-04-17 Treofan Germany Gmbh & Co. Kg Microporous separator film having homogeneous porosity and greater resistance to puncturing
JP6045921B2 (ja) * 2013-01-21 2016-12-14 オートモーティブエナジーサプライ株式会社 積層型電池とその製造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5667911A (en) 1994-11-17 1997-09-16 Hoechst Celanese Corporation Methods of making cross-ply microporous membrane battery separator, and the battery separators made thereby
US5565281A (en) 1994-12-02 1996-10-15 Hoechst Celanese Corporation Shutdown, bilayer battery separator
US5922492A (en) 1996-06-04 1999-07-13 Tonen Chemical Corporation Microporous polyolefin battery separator
US5952120A (en) 1997-04-15 1999-09-14 Celgard Llc Method of making a trilayer battery separator
US6368742B2 (en) * 1998-06-26 2002-04-09 Celgard, Inc. Polypropylene microporous membrane for battery separator
TW439309B (en) * 1999-01-22 2001-06-07 Toshiba Corp Nonaquous electrolyte secondary battery
US6602593B1 (en) * 1999-08-30 2003-08-05 Celgard Inc. Battery separators with reduced splitting propensity
US20020136945A1 (en) * 2000-01-18 2002-09-26 Call Ronald W. Multilayer battery separators

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EP1418635A2 (en) 2004-05-12
KR20040018127A (ko) 2004-03-02
EP1418635A3 (en) 2005-12-07
TW200403877A (en) 2004-03-01
US6921608B2 (en) 2005-07-26
CA2434353A1 (en) 2004-02-21
US20030099877A1 (en) 2003-05-29
CN1271729C (zh) 2006-08-23
SG120103A1 (en) 2006-03-28
JP2004134391A (ja) 2004-04-30
CN1481037A (zh) 2004-03-10

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