基于AVR单片机的镍镉电池快速充电装置设计     

孙印杰  田效伍 《商丘职业技术学院学报》2005,4(5):41-43

介绍了一种用AVR单片机设计的大容量镍镉电池快速充电装置．系统线路简单，体积小，工作稳定可靠．给出了系统的硬件结构和软件流程框图．  相似文献   

基于专利耦合的 中国、美国、日本锂离子电池技术前沿及差距分析     

佟贺丰  傅俊英曹 燕 《中国科技资源导刊 (中国信息导报)》2016,(2):27-35

基于定量分析识别技术前沿并测度各国的技术差距具有重要的理论和现实意义。本研究初步探讨了基于专 利数据,利用文献计量学的引文耦合分析法,进行技术前沿的识别和技术差距粗略测度,并以锂离子电池为例进行实 证研究。研究结果表明,该方法所识别出来的中国、美国和日本在锂离子电池领域的技术前沿以及各国之间的技术差 距,与产业现状具有一定一致性,是一条可行的研究途径。  相似文献   

新能源汽车关键零部件动力电池供应风险识别与评估研究     

刘浩华 《科技管理研究》2016,(24):189-195

运用政策法,将动力电池界定为新能源汽车关键零部件中最关键的部分,将其定位为Kraljic矩阵中具有高供应风险的战略项目。研究发现,以磷酸铁锂和三元材料锂电池为代表的锂离子电池是当前动力电池的主流,其供应短缺风险突出,包括供应总量短缺及供应结构性短缺。建立单一车型风险评估模型,在考虑废旧电池回收利用参数的情况下建立企业级综合风险评估模型。  相似文献   

基于环境分析的长兴蓄电池企业竞争策略研究     

肖胜昔 《湖州职业技术学院学报》2011,(4):87-91

浙江长兴是我国重要的蓄电池生产基地。目前,长兴蓄电池企业面临难得的机遇：从宏观上看,蓄电池产品市场需求持续旺盛,政府支持蓄电池产业发展;从微观上看,蓄电池行业的集中度较高,下游企业的威胁相对较小。尽管蓄电池企业也存在原材料价格上涨,替代品威胁等不利因素,但整体上是机会大于威胁。各类蓄电池企业应根据宏观环境和行业现状,结合自身的特点,采取不同的竞争策略,以赢得自身的生存和发展。  相似文献   

Encapsulating metal organic framework into hollow mesoporous carbon sphere as efficient oxygen bifunctional electrocatalyst     

Wanfeng Xiong  Hongfang Li  Hanhui You  Minna Cao  Rong Cao 《国家科学评论(英文版)》2020,7(3):609

Applying metal organic frameworks (MOFs) in electrochemical systems is a currently emerging field owing to the rich metal nodes and highly specific surface area of MOFs. However, the problems for MOFs that need to be solved urgently are poor electrical conductivity and low ion transport. Here we present a facile in situ growth method for the rational synthesis of MOFs@hollow mesoporous carbon spheres (HMCS) yolk–shell-structured hybrid material for the first time. The size of the encapsulated Zeolitic Imidazolate Framework-67 (ZIF-67) is well controlled to 100 nm due to the spatial confinement effect of HMCS, and the electrical conductivity of ZIF-67 is also increased significantly. The ZIF@HMCS-25% hybrid material obtained exhibits a highly efficient oxygen reduction reaction activity with 0.823 V (vs. reversible hydrogen electrode) half-wave potential and an even higher kinetic current density (J_K = 13.8 mA cm⁻²) than commercial Pt/C. ZIF@HMCS-25% also displays excellent oxygen evolution reaction performance and the overpotential of ZIF@HMCS-25% at 10 mA cm⁻² is 407 mV. In addition, ZIF@HMCS-25% is further employed as an air electrode for a rechargeable Zn–air battery, exhibiting a high power density (120.2 mW cm⁻² at 171.4 mA cm⁻²) and long-term charge/discharge stability (80 h at 5 mA cm⁻²). This MOFs@HMCS yolk–shell design provides a versatile method for the application of MOFs as electrocatalysts directly.  相似文献   

我国电动汽车数据库建设的几个问题     

张旭明赵立金  葛莹莹 《中国科技资源导刊 (中国信息导报)》2015,(1):106-109

从数据库设计、数据采集及数据库维护及更新等3 个方面讨论在建立我国电动汽车专业数据库过程中所遇到 的问题及提出的解决方案,这对于电动汽车专用数据库建设具有一定的借鉴意义。  相似文献   

便携式大容量太阳能锂离子电池充电器的设计     

李俊杰  朱金武 《天津职业院校联合学报》2011,(5):29-31

锂离子电池其高能量、高电压、长寿命、无污染等优势成为人们的首选。硅太阳能电池可分为单晶硅电池、多晶硅电池、非晶硅电池。锂离子电池的充电过程可分为三个阶段即恒流模式、恒压模式及涓流模式。为此我们利用多晶硅电池,非晶硅电池作为主要的充电能源,对锂离子或者锂-聚合物可充电电池通过电池管理芯片,实现可移动太阳能锂离子电池充电。  相似文献   

考虑不确定性的电动汽车动力电池逆向物流网络设计     

刘娟娟  郭炎可 《上海海事大学学报》2021,42(2):96-102

考虑到电动汽车动力电池回收量、回收技术水平等参数的不确定性,以逆向物流网络总利润最高和环境影响最小为目标,建立多目标模糊规划模型,进行电动汽车动力电池逆向物流网络设计。利用基于可信性测度的模糊求解方法处理模型中的模糊参数。引入决策者偏好系数,采用加权理想点法将多目标模型转化为单目标模型进行求解,得到考虑不确定性的逆向物流网络设施的选址、数量以及设施间的废旧动力电池流量分配方案。通过数值算例验证模型和算法的可行性和有效性。对回收量、回收技术水平和决策者偏好系数进行灵敏度分析,结果表明:随着回收量的增加,逆向物流网络利润增加;回收技术水平的提升和决策者选择合适的偏好系数可以提高逆向物流网络的经济效益和环境效益。  相似文献   

船舶制冷空调系统对环境的污染及其控制对策     

孙永明 《上海海事大学学报》1999,(4)

大气臭氧层的空洞已成为全球环境保护的焦点。中国的远洋运输船队是世界最大的船队之一。由于船用制冷空调系统在海运业的广泛使用,CFCs和HCFCs的使用使全球环境愈加恶化。从环保角度出发,本文介绍了国际上最新的CFCs和HCFCs的禁用日程及动向,比较了几种相对成熟的替代物,并从船舶制冷空调系统的操作和维护角度就如何避免环境污染提出了一些方法  相似文献   

Associations between motor proficiency in children with history of maltreatment and living in social economically vulnerability     

《Child abuse & neglect》2017

Maltreatment and living in poor socioeconomic conditions during childhood may implicate in deficits on motor proficiency, nevertheless, the literature on this issue is still scarce. The goal of the study was to investigate the possible associations among manual dexterity, aiming and catching tasks, and balance tasks for children who suffers maltreatment and lived in social vulnerability. Eighty-two (82) children (08-09 years old) participated in the study. Forty-one (41) belong to the (SEV-M Group) children living in social economic vulnerability and were previously maltreated (lived in foster homes as results of parental neglect and domestic violence), and 41 belong to the (SEV Group) children living in social economical vulnerability with no history of childhood maltreatment. Children were assessed using the Movement Assessment Battery for Children –2nd Edition. Structural Equation Modeling was used to analyze the data. The results suggest the existence of a variety of motor difficulties in the group of children who suffered from neglect and domestic violence. The statistics model showed a negative effect for children in at-risk environments (regression coefficient = −0.30) and only showed a significant effect (p = 0.04) for balance abilities. Traumatic experiences may have a negative effect on children’ balance proficiency.  相似文献