铅酸蓄电池行业整风

受多部门联合整治铅酸蓄电池行业影响,全国多地铅酸蓄电池生产企业停产。下游多数电动自行车企业面临成本上涨,甚或无电池可用的困境。蓄电池短缺或将倒逼电动自行车行业调整。5月,浙江、广东等地再现铅酸蓄电池企业污染事件,各地对铅酸蓄电池行业开始了大面积停业整顿,铅酸蓄电池企业从1700家压缩到300家左右,这将对行业产生巨大影响。也直接影响到了下游电动自行车行业。由于铅酸蓄电池涉及到电池保质     

铅锌及稀贵金属篇

去年我国铅酸蓄电池的进出口活跃海关统计数据显示,12月份我国进口铅酸蓄电池197.3万只,其中用于活塞电动机的蓄电池为4.4万只,其他铅酸蓄电池为192.9万只。2003年累计进口铅酸蓄电池1574万只,其中活塞电动机的蓄电池为49.4万只,同比提高140.13%,其他蓄电池为1525.6万只,同比提高了47.67%。12月份我国出口铅酸蓄电池1061.6     

短期国内铅消费或维持平稳

目前是传统铅酸蓄电池的消费淡季,但三大通信运营商在全国主要城市正式启动3G的商用,大大增加了通讯用铅酸蓄电池的需求量,短期内将对铅酸蓄电池形成一定的正面影响。长期来看,铅酸蓄电池主要需求仍在汽车行业。     

污染问题考验铅酸蓄电池业

分析了铅酸蓄电池行业面临的卡大问题,认为回收环节处理不当也是造成铅酸蓄电池污染的重要原因,针对减少铅污染的问题提出了几条铅酸蓄电池行业的发展建议.     

关于废旧铅酸蓄电池综合回收利用浅析

随着市场经济的迅速发展,我国的汽车量快速增长,每年有大量的废旧铅酸蓄电池产生,这些废旧铅酸蓄电池给环境带来了巨大的污染。通过对废旧铅酸蓄电池的研究与探讨,找到解决由此带来的污染问题。介绍了5种废旧铅酸蓄电池回收技术,其中详细阐述了国产破碎分选技术在实际综合回收利用中的工艺与设计。实例通过工艺备料、破碎分选、废酸处理三工序有效地回收了废旧铅酸蓄电池中的有价金属,解决了废旧铅酸蓄电池对环境的污染,同时为生产企业带来了经济效益。     

铅酸蓄电池企业清洁生产简析

近年来,安全性能较高、可回收利用且生产升本较低的铅酸蓄电池得到了广泛应用。与此同时,铅酸蓄电池生产过程中的污染问题不容忽视,结合实际生产工艺对铅酸蓄电池企业的产排污情况及清洁生产措施进行了简析。     

中国铅酸蓄电池行业的发展及趋势

介绍了中国铅酸蓄电池行业的基本状况，将蓄电池的结构和性能指标与国际先进水平进行了比较，并阐述了中国铅酸蓄电池行业的经营状况、竞争状况及发展趋势。     

1O月份我国铅酸蓄电池进出口保持强劲增长

最新海关统计数据显示,10月份我国进口铅酸蓄电池156.9万只,其中用于活塞电动机的蓄电池为9.5万只。1～10月份累计进口铅酸蓄电池2101.4万只,用于活塞电动机的蓄电池为40.4万只,同比提高了118.11%。10月份出口951.6万只铅酸蓄电池,用于活     

中国铅酸蓄电池行业的现状及前景

本文介绍了铅酸蓄电池在化学电源中的地位、面临的挑战和今后的发展方向,对铅酸蓄电池行业的现状、近年来的发展趋势、存在的问题及铅酸蓄电池的应用领域、市场前景和需求作了简单的分析,提出了存在的问题和入世后的对策。     

GK1型内燃机车蓄电池的维护与应用

在分析铅酸蓄电池特性和总结实际应用经验的基础上,阐述了铅酸蓄电池在内燃机车上的正确 维护方法。     

无汞碱锰电池用锌粉综述

无汞锌粉是无汞碱锰电池的关键材料之一。文章分析了汞在电池中的功能作用;提出了实现碱锰电池无汞化的重要性;综述了无汞锌粉的制备方法;介绍了锌粉中合金元素含量、杂质和氧化锌含量、以及锌粉颗粒大小和形状对碱锰电池性能的影响。     

铝箔在锂离子电池中的应用

通过分析铝箔作为锂离子电池的正极集流体的机理、锂离子电池芯的结构分析和生产工艺,归纳出正极集流体用铝箔的技术要求;通过分析铝箔作为聚合物锂离子电池的包装材料阻隔层的机理、软包装材料的结构分析和生产工艺,归纳出聚合物锂离子电池的包装材料阻隔层铝箔的技术要求。     

The measurement of executive function at age 3 years: Psychometric properties and criterion validity of a new battery of tasks.

In this study, the authors examined the psychometric properties and criterion validity of a newly developed battery of tasks that were designed to assess executive function (EF) abilities in early childhood. The battery was included in the 36-month assessment of the Family Life Project (FLP), a prospective longitudinal study of 1,292 children oversampled from low-income and African American families. Ninety-one percent of children were able to complete 1 or more of the tasks. Psychometric analyses were used to test the dimensionality of each task, evaluate the item and task properties, test the dimensionality of the task battery, and evaluate the criterion validity of the battery with multi-informant measures of attention-deficit/hyperactivity disorder (ADHD) symptomatology and child performance on two subtests of the Wechsler Preschool and Primary Scale of Intelligence. Results indicated that the tasks were successful in measuring interindividual differences in child EF ability, that task scores were most informative about ability level for children in the low to moderate range of ability, that children's performance across the entire battery was adequately summarized by a single factor, and that individual differences on the EF battery were related to ADHD symptomatology and intelligence in expected ways. Results are discussed with respect to the importance of developing psychometrically sound, scalable instruments that facilitate the measurement of interindividual differences in intraindividual change of EF across the early childhood period. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A solar cell system for extension of battery run time in a moving actuator total artificial heart

An implantable total artificial heart (TAH) system has strong dependence upon the external battery performance for operation. Even under sophisticated battery management control, the usable external battery performance continues to decrease, which limits TAH performance. One of the ways to overcome this energy problem is to use a solar system (SS). An SS can provide electrical power for the partial TAH drive or battery recharge. This article presents a new concept for use of the solar cell for obtaining double external battery performance. To achieve it, numeric simulations were carried out to obtain the proper magnitude of solar parameters. In the TAH used, the battery power for a cardiac output of 4-6 L/min is approximately 17 W/20 min. From simulated results, the optimal power and voltage of the SS were found to be 7 W, Voc = 27 V in the case of the 24 V motor. Each solar cell includes Voc = 0.5 V, Isc = 37 mA/cm2, FF (fill factor) = 0.77, and efficiency = 10%. Based on the simulation, the effect of solar power capacity on battery run time was studied. With use of 6.5 W SS (W 304 x H 245 x D 16 mm, 1.1 kg), battery performance decreased in vitro from 100% (fully charged) to > 55% vs 0% in the conventional battery system after 20 min operation. However, it dropped to below 20% when using W SS (W 192 x H 192 x D 16 cm, 0.6 kg). The results showed doubled battery run time could be obtained compared with a system without the SS. It was concluded that the proposed SS can be put to practical use as a future energy source for a TAH.     

Factors on Storage Performance of MH-Ni Battery

The open voltage of batteries shows different status after MH-Ni batteries are stored for a period of time.Some batteries with 0, 0.9 ～ 1.1V and above 1.1 V were chosen to study their corresponding internal resistances, open voltages and the reduction of capacities, etc.On the basis of battery reaction principle, battery samples were analyzed,and factors causing different storage performance were found out.Therefore, some references on the improvement of battery storage performance were provided.     

电位滴定法测定钒电池电解液中硫酸根

钒电池电解液的酸根组成和浓度会严重影响电池的效率,需要准确地测定各种酸根的浓度,以便及时地进行调节。重量法是测定硫酸根的经典方法,但操作步骤繁琐、耗时较长,不能满足过程控制调整的要求。实验采用EDTA络合钒,再以NaOH标准滴定溶液利用酸碱滴定法测定溶液中总氢离子浓度,根据样品中不同价态钒的浓度通过计算即可得到样品中硫酸根浓度,实现了电位滴定法对含钒电解液中硫酸根离子的检测。实验对EDTA加入量、EDTA加入形式进行优化。分别按照实验方法和重量法测定1个钒电池电解液中硫酸根,两种方法无显著性差异;按照实验方法对两个钒电池电解液样品中硫酸根进行加标回收试验,回收率为98.9%~100.0%;按照实验方法测定3个钒电池电解液样品中硫酸根,结果的相对标准偏差(RSD,n=5)为0.13%~1.2%。分别使用实验方法和重量法测定含有不同价态钒的3个钒电池电解液中硫酸根,结果相吻合。     

锂离子电池正极材料LiNiO_2的研制

综述了锂离子电池正极材料国内外研究及应用现状 ,提出了锂离子电池充放电作用机理和对正极材料的技术要求 ,着重研究了 Li Ni O2 材料的合成方法和性能特点 ,给出了最佳制备工艺条件     

Separator Material Chosen for MH/Ni Battery

The properties of MH/Ni batteries using different separator were studied.And then an idea for choosing separator for high-power MH/Ni battery was provided.Using the separator with grafting treatment, the storage characteristic, charge retention characteristic and anti-soft-short characteristic of high-power MH/Ni battery are improved.Wetlaid and spunfibre material meet different properties requirement of battery.     

Validity and fairness of physical ability tests for predicting performance in craft jobs.

Problems relating to performance, accidents, and turnover in outdoor telephone craft jobs stimulated 2 experiments aimed at developing and validating a physical test battery. Based on job analysis results, a battery of 9 measures was administered to a sample of 128 Ss (83 males and 45 females) in Exp I. A 2-test battery (dynamic arm strength and reaction time), valid for predicting job task performance and turnover, was selected. Regression equations for males and females were not significantly different. Exp II included a sample of 210 Ss (132 males and 78 females). A 3-test battery consisting of a body density measure, a balance test, and a static strength test was selected based on relationships with training performance. No significant differences were found in the regression equations for males compared to females. The Exp II battery was also significantly related to field performance, training completion, and accidents and was valid for the Exp I criteria. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Statistical Comparison of Bioassays for Assessment of Toxicity of Organic Components of Wastewater to Activated Sludge

In aquatic toxicity testing, no single test species responds appropriately to all toxicants. Therefore test batteries consisting of several individual assays are becoming more common. The species comprising a test battery should be representative of the entire system of interest. Each assay should be complementary to other components in the test battery and the test battery should not include redundant tests. We studied the selection of test battery components for the assessment of the toxicity of organic chemicals to activated sludge. The assays considered were the continuous Shk1, Microtox, Polytox, activated sludge respiration inhibition, Nitrosomonas, and Tetrahymena assays. The correlations between the toxicity data obtained from these assays were analyzed by examining the correlation matrix and by principal component analysis. These statistical methods showed that the Nitrosomonas assay should be included in test batteries plus one of the remaining five assays for assessing toxicity of organic compounds to activated sludge.