CN103700893A - 耐高温中密电池 - Google Patents
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Abstract
本发明提供一种耐高温中密电池,其正极板铅膏中添加天然能元素,在铅膏和制时所用纯水需经过负离子处理。电池极板平行于壳体底面,即平行于地面放置,电池壳体采用耐高温PPO材料。本发明电池适合45℃以上高温环境使用,其高温浮充和高温循环性能有明显提升。
Description
技术领域
本发明涉及铅酸蓄电池,具体讲是一种新型耐高温中密电池。
背景技术
目前,阀控密封铅酸蓄电池技术取得了较大的发展,在通信行业得到了广泛应用,为通信行业的发展起到重要的支柱作用。随着城市集中度的不断提高,成块整体面积的蓄电池机房已经逐步取消,微蜂窝的无线集成分布式基站技术应运而生,蓄电池环境温度也从原来的25℃上升至45℃。传统中型密封电池在高温环境下寿命会下降75%;目前,中密电池无法满足高温应用场景的使用要求,因此迫切需要研制一种新型的耐高温中密电池。
发明内容
本发明的目的在于克服现有的中密电池耐高温性能不足的缺陷,提供一种耐高温性能好、使用寿命长的耐高温中密电池。
本发明的技术方案是:耐高温中密电池,包括极板和壳体,极板由板栅涂上铅膏后形成,其改进之处是所述极板在壳体中平行于壳体底面放置,所述铅膏的正极铅膏中添加天然能元素,该正极铅膏的成分及重量百分比为:红丹11%~13%,硫酸6.2%~7.0%,短纤维0.05%~0.15%,纯水8%~12%,天然能元素0.2%~1.0%,其余为铅粉,其中,所用纯水经过负离子处理。
所述壳体采用耐高温PPO材料;所述天然能元素为钛酸锶;所述硫酸密度为1.400g/cm3。
本发明中极板平行于壳体底面,即使用状态下,极板平行于地面。该结构能够有效减小单位面积的电流承载,延长腐蚀寿命;提高中密电池各单体的均匀性;解决现有中密电池极板垂直于地面的酸液分层现象,提高从电接受能力,减少负极板在高温环境中盐化,提高耐高温中密电池的使用寿命。
在正极铅膏中添加0.2~1%的天然能元素和使用负离子水进行和膏,使铅膏的孔隙率更均匀,有效减小在高温使用环境中极板活性物质的体积膨胀系数,增加活性物质对板栅的保护,减小电池内阻,减少正极活性物质膨胀对电池装配的破坏。
采用耐高温的PPO壳体,提高耐高温性能,减小壳体的高温变形,保持电池极群的装配压力,减少失水,延长电池使用寿命。
附图说明
图1为本发明耐高温中密电池示意图。
图中,1-极板,2-汇流排,3-电池单格,4-水平地面。
具体实施方式
下面通过实施例进一步说明本发明及其有益效果。
参见图1,实施例中的电池由六个单格3构成,每个单格中,极板1平行于壳体底面,即平行于使用时的水平地面4,汇流排2分别将正、负极板连接在一起。电池的制作和对比测试如下:
例一、在正极铅膏中添加0.5%的钛酸锶,并使用负离子水进行和制,正极铅膏的成分及重量百分比为:红丹12%,硫酸(1.4g/cm3)6.7%,短纤维(4d~6d)0.1%,负离子水10%,钛酸锶0.5%,其余为铅粉。采用耐高温的PPO壳体材料,正负极板平行于壳体底面,极群采用极板平行于地面的排列方式,其余参照现行的中密电池正常生产工艺进行,试制作新型耐高温中密40Ah电池10只,与10只正常中密40Ah电池同时同路上线化成;在线电池容量均合格,下线后该电池各取2只进行高温浮充对比试验,各取4只进行45℃60%DOD循环试验,各取一只进行65℃极限高温对比试验,各取一只进行耐短路能力对比测试。剩余2只电池进行试验过程的备样。本次对比测试充放设备均为张家港金帆电源μC-CF30微电脑循环充放电测试仪,电流精度±0.5%,两个并行回来同时同环境进行,高温环境为上海试验仪器厂(常温~300℃)高温箱,温度精度±0.5℃。
1、耐极限高温
取试验样品和正常电池在65℃±2℃环境中以浮充电压恒压充电15天;降温至25℃±2℃;新型耐高温中密电池容量出现上升为首次的106%;正常电池容量为首次的97%,,正常电池出现壳体宽度方向明显鼓胀,新型耐高温中密电池外观无明显的异常;本发明提高了中密电池在高温环境的适用性。
2、耐短路能力
在45℃±2℃环境中将新型耐高温中密电池和正常对比电池;使用10小时率电流,放电至0V,使用导线短接24小时,以浮充电压恒压充电48小时,检测10十小时率容量;以上述方式进行循环试验,正常电池在8次时电池失效,无法发现,新型耐高温中密电池进行至15次,10小时率容量仍然大于额定容量;解剖进行分析,正常电池正极板膨胀,导致铅膏刺破隔膜短路。新型耐高温中密电池在高温环境的耐短路能力明显优于正常电池。
3、45℃60%DOD循环试验
各取4只新型耐高温中密电池和正常电池分别串联进行高温循环对比试验,在45℃±2℃环境中,以0.2C10电流放电3小时,以恒压2.35V/单体,限流0.15C10A充电6小时,为1个小循环;每30个小循环放电后恒压充电时间延长至12小时;每60个小循环进行一次10小时率容量检测,当电池组10小时率容量小于额定容量60%,寿命终止。
参加试验的正常电池,当进行了33次小循环后,放电终止电压低于终止电压,10小时率容量检测电池剩余容量低于额定容量60%,寿命终止。
新型耐高温中密电池进行了120次循环,检测10小时率剩余,为额定容量的119%。
按照上述制式在高温环境中,新型耐高温中密电池的循环性能远高于正常电池,本发明提高了中密电池在高温环境的循环性能。
4、高温浮充
各取2只电池,依据YD/T799标准的高温浮充,在60℃±2℃环境中进行高温对比试验。循环制式:对蓄电池以恒压2.25V/单体,限流0.1C10A电流连续浮充30天,将蓄电池组取出,在25℃±2℃环境中进行3小时率容量检测,为1个循环,直至蓄电池容量低于3小时率额定容量的80%,寿命试验终止。
按照上述标准的方法进行高温浮充寿命试验对比测试,直至蓄电池容量低于3小时率额定容量的80%时,正常电池进行4次寿命终止,新型耐高温中密电池进行了8次循环。
从上述试验结果可以看出,采用本发明例一制作的电池耐极限高温、耐短路能力、高温循环(45℃60%DOD循环试验)、高温浮充寿命均有明显提升,能够适应在高温环境下使用。
例二、在正极铅膏中添加0.3%的天然能元素钛酸锶,并使用负离子水进行和制,采用耐高温的PPO壳体材料,其余制作工艺同例一。制作32只6V210新型耐高温中密电池,分为4组分别进行高温浮充和高温循环试验,高温浮充寿命较正常同类电池延长一倍以上,高温循环性能提升超过三倍,也得到了同样的效果。
Claims (4)
1.一种耐高温中密电池,包括极板和壳体,极板由板栅涂上铅膏后形成,其特征是所述极板在壳体中平行于壳体底面放置,所述铅膏的正极铅膏中添加天然能元素,该正极铅膏的成分及重量百分比为:红丹11%~13%,硫酸6.2%~7.0%,短纤维0.05%~0.15%,纯水8%~12%,天然能元素0.2%~1.0%,其余为铅粉,其中,所用纯水经过负离子处理。
2.按权利要求1所述的耐高温中密电池,其特征是所述壳体采用耐高温PPO材料。
3.按权利要求1所述的耐高温中密电池,其特征是所述天然能元素为钛酸锶。
4.按权利要求1所述的耐高温中密电池,其特征是所述硫酸密度为1.400g/cm3。
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CN101969126A (zh) * | 2010-09-15 | 2011-02-09 | 超威电源有限公司 | 一种正极铅膏配方 |
CN102244300A (zh) * | 2011-06-03 | 2011-11-16 | 界首市华宇电源有限公司 | 石墨烯作为添加剂的铅酸电池 |
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CN1482696A (zh) * | 2002-09-11 | 2004-03-17 | 江苏隆源双登电源有限公司 | 狭长型阀控密封铅酸蓄电池正极铅膏配方及固化工艺 |
JP2005044680A (ja) * | 2003-07-24 | 2005-02-17 | Furukawa Battery Co Ltd:The | 鉛蓄電池 |
CN101841030A (zh) * | 2010-05-27 | 2010-09-22 | 江苏华富控股集团有限公司 | 一种铅蓄电池正极板的制备方法 |
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