一种新VRLA电池隔板材料的开发及电气性能分析

Development of a novel synthetic loaded separator paper for VRLA batteries

100%玻璃纤维是VRLA电池中使用最为广泛的隔板材料,从研发至今已有30余年历史。随着VRLA电池市场和消费者需求的不断提高,对产品的性能、可靠性和产能提出了更高的要求。电池的可靠性和电气性能与隔板使用的玻璃纤维有关。隔板材料的性能影响到电池的制造工艺、不良率、产能、循环使用寿命、可靠性和放电性能。提出了一种含有8%合成纤维的隔板材料。充分的数据表明,该类型隔板的电气性能等同、甚至优越于100%玻璃纤维隔板,提高了电池性能。容量、充放电循环和AFL测试结果表明,使用该类型隔板的电池电气性能与AGM隔板相当,甚至略有提高。拆毁研究表明在55℃进行AFL测试后该类型隔板没有发生退化。

Absorbent glass material made of 100% microglass fibre is a well-known separator for valve regulated lead acid（VRLA） batteries and has been in use for around 20-year period. As the VRLA battery market and demands of the customer continue to grow; electrical performance, productivity and reliability of VRLA batteries are being enhanced. This is achieved through a combination of process, quality assurance, materials and electrochemical engineering. Reliability and electrical performance of the battery is linked to the AGM glass material. Properties of the AGM material impact the assembly route,defect rates, productivity, product cyclability, life, reliability and recharge performance. A specific product containing 8%synthetic fibers for thin plate application was developed. Enough data were gathered to guarantee that the electrical performance of this type of separator is equal to or better than 100% glass AGM and the battery productivity was increased.The electrical performance of the batteries manufactured with synthetic loaded separator paper was equal or better than the AGM counterpart as demonstrated by capacity testing, cycling and accelerated float life（AFL） tests. Tear-down investigation after accelerated float life testing at 55 ℃ shows no degradation of the synthetic separator paper.