CN102044668B - 一种镍氢充电电池正极片的制作工艺 - Google Patents

一种镍氢充电电池正极片的制作工艺 Download PDF

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CN102044668B
CN102044668B CN200910190780.XA CN200910190780A CN102044668B CN 102044668 B CN102044668 B CN 102044668B CN 200910190780 A CN200910190780 A CN 200910190780A CN 102044668 B CN102044668 B CN 102044668B
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nickel
foamed
positive plate
battery
foamed nickel
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CN102044668A (zh
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杨志磊
彭东方
王守军
刘新华
王卫东
姬建军
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SHENZHEN EPT BATTERY CO Ltd
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Abstract

本发明涉及充电电池正极片的制作工艺，主要对正极片工艺流程增加了对发泡镍超声波雾化处理。所述的发泡镍超声波雾化处理是让发泡镍通过一个发泡镍处理设备，所述的发泡镍处理设备包括装有片状超声波、可调控喷嘴、湿度计的方形塑料槽和一个聚四氟乙烯水溶液水槽等。通过超声波将聚四氟乙烯水溶液用可调节喷嘴以雾状高速喷射到发泡镍的间隙中，经过该设备的发泡镍在制作成正极片后，由于发泡镍中含有聚四氟乙烯使正极粉不易与发泡镍脱落从而能保持电池的电容、电压稳定、保障电池的寿命，且提高极片的柔韧性，从而减少正极片卷绕时产生的裂纹，降低了电池的短路率，使电池更加符合安全标准。

Description

一种镍氢充电电池正极片的制作工艺
所属领域：
本发明涉及充电电池正极片的制作工艺，尤其适用于镍氢充电电池正极片的制作工艺。
背景技术
目前充电电池正极片的制作工艺，在正极片卷绕时容易产生裂纹，使电池容易形成短路，影响了电池的安全性能；且由于正极片不能很好的粘腻正极粉，从而导致电池容易造成低压、低容的情况。
发明内容
本发明的目的在于提供一种镍氢充电电池正极片的制作工艺，从而降低充电电池正极片在电池寿命循环中造成正极片的粉化、极片裂纹程度，提高电池的寿命、质量、安全性能。
本发明的目的通过以下方法实现：
本发明主要对正极片工艺流程增加了对发泡镍超声波雾化处理，改进后的工艺流程如下：发泡镍定位→发泡镍预压→发泡镍超声波雾化处理→发泡镍上粉→对辊碾压→极片分切。
发泡镍超声波雾化处理是让发泡镍通过一个发泡镍处理设备，所述的发泡镍处理设备包括装有片状超声波、可调控喷嘴、湿度计的方形塑料槽和一个聚四氟乙烯水溶液水槽等。通过超声波将聚四氟乙烯水溶液用可调节喷嘴以雾状高速喷射到发泡镍的间隙中，发泡镍处理设备工作时观察方形塑料槽内的湿度计，使方形塑料槽保持在300％-400％的湿度范围内。经过该设备的发泡镍在制作成正极片后，由于发泡镍中含有聚四氟乙烯可以起到很好的粘腻作用，使正极粉不易与发泡镍脱落从而能保持电池的电容、电压稳定、保障电池的寿命，同时由于发泡镍中含有聚四氟乙烯，增加了发泡镍的密度，有效的提高极片的柔韧性，从而减少正极片卷绕时产生的裂纹，降低了电池的短路率，使电池更加符合安全标准。
附图说明
图1是发泡镍处理设备的示意图
图2是本发明制作的电极片和常规工艺制作的电极片低压率对比图
图3是本发明制作的电极片和常规工艺制作的电极片短路率对比图
图4是本发明制作的电极片和常规工艺制作的电极片使用寿命对比图
具体实施结果
结合图1-4所示对本发明做进一步说明：
如AA2300-W电池，制作正极片时，先对发泡镍定位、预压后，用发泡镍处理设备对其雾化处理：让发泡镍5通过一个方形塑料槽1，方形塑料槽内安装的可调节喷嘴4和片状超声波2将聚四氟乙烯水溶液雾气高速喷射到发泡镍5的间隙中，通过观察湿度计3让方形塑料槽内的湿度保持在300％-400％的湿度范围内。然后再对通过发泡镍处理设备处理后的发泡镍上粉、对辊碾压、极片分切，制成的镍氢充电电池正极片。
本发明和现有的正极片制作工艺的性能对比如下：
低压率对比
方法：取常规工艺制作正极片的电池和本发明制作的正极片电池对比，常规工艺电池的低压率为0.3％、本发明工艺电池低压率为0.05％。(见图2)
短路率对比
方法：取常规工艺制作正极片的电池和本发明制作的正极片电池对比，常规工艺电池短路率为0.55％、本发明工艺电池短路率为0.18％。(见图3)
使用寿命对比
方法：取常规工艺制作正极片的电池和本发明制作的正极片电池测试使用寿命对比，条件为1、1C充68分钟-Δ＝5mV 2、搁置30分钟3、1C放到1.0V循环工步1-3至初始容量的80％结束测试，结果常规工艺制作的电池寿命明显要低于本发明工艺制作的电池寿命40周左右(见图4)

Claims (1)

1.一种镍氢充电电池正极片的制作工艺,增加了对发泡镍超声波雾化处理；
所述的超声波雾化处理是让发泡镍通过一个发泡镍处理设备，所述的发泡镍处理设备包括装有片状超声波、可调节喷嘴、湿度计的方形塑料槽和一个聚四氟乙烯水溶液水槽；
所述的发泡镍处理设备使发泡镍在方形塑料槽内，通过可调节喷嘴以雾状喷射聚四氟乙烯水溶液到发泡镍间隙中；
方形塑料槽内湿度保持在300%-400%的范围。
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CN102569747A (zh) * 2012-01-13 2012-07-11 麻城市众盈电源电子有限公司 基于雾化式涂布增强膜制备镍电池正极片的工艺及装置
CN102956873B (zh) * 2012-11-01 2015-02-25 浙江天能能源科技有限公司 一种镍氢电池的正极极片的制作方法及制作设备

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CN1707831A (zh) * 2005-05-24 2005-12-14 中国地质大学（武汉） 一种利用发泡镍材料作为集流体的锂电池及其制备方法
CN101355166A (zh) * 2007-07-26 2009-01-28 上海空间电源研究所 质子交换膜燃料电池膜电极的制备方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1707831A (zh) * 2005-05-24 2005-12-14 中国地质大学（武汉） 一种利用发泡镍材料作为集流体的锂电池及其制备方法
CN101355166A (zh) * 2007-07-26 2009-01-28 上海空间电源研究所 质子交换膜燃料电池膜电极的制备方法

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