CN106953058A - 锂离子电池隔膜 - Google Patents

锂离子电池隔膜 Download PDF

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Publication number
CN106953058A
CN106953058A CN201710229774.5A CN201710229774A CN106953058A CN 106953058 A CN106953058 A CN 106953058A CN 201710229774 A CN201710229774 A CN 201710229774A CN 106953058 A CN106953058 A CN 106953058A
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woven fabric
fabric layer
lithium ion
ion battery
nonwoven layer
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王聪
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Tianjin CAS Institute of Advanced Technology
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Tianjin CAS Institute of Advanced Technology
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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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/44—Fibrous material
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cell Separators (AREA)

Abstract

本发明涉及电池技术领域，尤其涉及一种锂离子电池隔膜，包括无纺布层、聚烯烃多孔膜，所述无纺布层的上部和下部分别带有沟槽，所述聚烯烃多孔膜压合在无纺布层的上下两侧，所述无妨布层的表面均布有微孔，孔隙率为80％，无纺布层的厚度为3‑6μm。本电池隔膜将无纺布层的上下表面先压制一定深度的沟槽，这样即使是在高温下该隔膜热膨胀现象非常的小，仍然可以保持其形状，不会存在爆炸的隐患，提高了锂电池的安全性能，同时3um的无纺布层厚度能显著改善隔膜的热稳定性和机械性能。

Description

锂离子电池隔膜
技术领域
本发明涉及电池技术领域，尤其涉及一种锂离子电池隔膜。
背景技术
在锂电池的结构中，隔膜是关键的内层组件之一。隔膜的性能决定了电池的界面结构、内阻等，直接影响电池的容量、循环以及安全性能等特性，性能优异的隔膜对提高电池的综合性能具有重要的作用。隔膜的主要作用是使电池的正、负极分隔开来，防止两极接触而短路,此外还具有能使电解质离子通过的功能。隔膜材质是不导电的，其物理化学性质对电池的性能有很大的影响。电池的种类不同，采用的隔膜也不同。现有技术中的锂电池隔离膜往往由于技术不够成熟，常常会出锂电池爆炸的问题，其主要原因是锂电池在耐高温方面存在很大的不足。
发明内容
本发明的目的在于克服上述技术的不足，而提供一种锂离子电池隔膜，耐高温，透气性能佳。
本发明为实现上述目的，采用以下技术方案：
一种锂离子电池隔膜，其特征在于：包括无纺布层、聚烯烃多孔膜，所述无纺布层的上部和下部分别带有沟槽，所述聚烯烃多孔膜压合在无纺布层的上下两侧，所述无妨布层的表面均布有微孔，孔隙率为80％，无纺布层的厚度为3-6μm。本电池隔膜将无纺布层的上下表面先压制一定深度的沟槽，这样即使是在高温下该隔膜热膨胀现象非常的小，仍然可以保持其形状，不会存在爆炸的隐患，提高了锂电池的安全性能，同时3um的无纺布层厚度能显著改善隔膜的热稳定性和机械性能。
优选地，所述沟槽深度为1μm-3μm。
本发明的有益效果是:相对于现有技术，本电池隔膜将无纺布层的上下表面先压制一定深度的沟槽，这样即使是在高温下该隔膜热膨胀现象非常的小，仍然可以保持其形状，不会存在爆炸的隐患，提高了锂电池的安全性能，同时3um的无纺布层厚度能显著改善隔膜的热稳定性和机械性能。
附图说明
图1为本发明的结构示意图。
具体实施方式
下面结合附图及较佳实施例详细说明本发明的具体实施方式。如图1所示，一种锂离子电池隔膜，包括无纺布层1、聚烯烃多孔膜2，所述无纺布层的上部和下部分别带有沟槽3，所述聚烯烃多孔膜压合在无纺布层的上下两侧，所述无妨布层的表面均布有微孔，孔隙率为80％，无纺布层的厚度为3-6μm。所述沟槽深度为1μm-3μm。本隔膜不仅具有液态锂电池电芯的高电压、长循环寿命、放电电压平稳以及清洁无污染的特点。而且消除了液态锂电池存在的爆炸的安全隐患，同时外形更灵活、方便，重量更轻巧。
本电池隔膜将无纺布层的上下表面先压制一定深度的沟槽，这样即使是在高温下该隔膜热膨胀现象非常的小，仍然可以保持其形状，不会存在爆炸的隐患，提高了锂电池的安全性能，同时3um的无纺布层厚度能显著改善隔膜的热稳定性和机械性能。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (2)

1.一种锂离子电池隔膜，其特征在于：包括无纺布层、聚烯烃多孔膜，所述无纺布层的上部和下部分别带有沟槽，所述聚烯烃多孔膜压合在无纺布层的上下两侧，所述无妨布层的表面均布有微孔，孔隙率为80％，无纺布层的厚度为3-6μm。
2.根据权利要求1所述的锂离子电池隔膜，其特征在于：所述沟槽深度为1μm-3μm。
CN201710229774.5A 2017-04-10 2017-04-10 锂离子电池隔膜 Pending CN106953058A (zh)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983300A (zh) * 2011-09-05 2013-03-20 索尼公司 隔膜和非水电解质电池
CN103117369A (zh) * 2013-02-01 2013-05-22 深圳中兴创新材料技术有限公司 一种复合电池隔膜
CN204361159U (zh) * 2014-09-24 2015-05-27 浙江西凯新能源开发有限公司 一种锂电池隔膜
WO2015154320A1 (zh) * 2014-04-10 2015-10-15 佛山市金辉高科光电材料有限公司 一种新型改性无纺布锂离子电池隔膜及其制备方法
CN204857823U (zh) * 2015-07-16 2015-12-09 浙江中金铝业有限公司 锂电池隔膜
CN105772371A (zh) * 2016-04-29 2016-07-20 宁德卓高新材料科技有限公司 采用微凹版辊改善隔膜波浪边的方法及其微凹版辊
CN106233500A (zh) * 2014-05-20 2016-12-14 帝人株式会社 非水系二次电池用隔膜、其制造方法及非水系二次电池
CN205828500U (zh) * 2016-07-22 2016-12-21 江西冠德新材科技股份有限公司 一种超薄型动力电池隔膜

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983300A (zh) * 2011-09-05 2013-03-20 索尼公司 隔膜和非水电解质电池
CN103117369A (zh) * 2013-02-01 2013-05-22 深圳中兴创新材料技术有限公司 一种复合电池隔膜
WO2015154320A1 (zh) * 2014-04-10 2015-10-15 佛山市金辉高科光电材料有限公司 一种新型改性无纺布锂离子电池隔膜及其制备方法
CN106233500A (zh) * 2014-05-20 2016-12-14 帝人株式会社 非水系二次电池用隔膜、其制造方法及非水系二次电池
CN204361159U (zh) * 2014-09-24 2015-05-27 浙江西凯新能源开发有限公司 一种锂电池隔膜
CN204857823U (zh) * 2015-07-16 2015-12-09 浙江中金铝业有限公司 锂电池隔膜
CN105772371A (zh) * 2016-04-29 2016-07-20 宁德卓高新材料科技有限公司 采用微凹版辊改善隔膜波浪边的方法及其微凹版辊
CN205828500U (zh) * 2016-07-22 2016-12-21 江西冠德新材科技股份有限公司 一种超薄型动力电池隔膜

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