多功能燃料电池测试平台的设计与开发

燃料电池测试平台是燃料电池系统开发过程中的关键测试设备,用于实现燃料电池的性能测试、寿命评估和理论基础研究。本文从系统设计、安全设计、工业设计和控制设计4个方面详细讨论了多功能燃料电池测试平台的总体设计思想,阐述了燃料电池测试平台中反应气体供给系统、加湿系统、氮气供应系统、循环冷却水系统、废气排放系统和电控系统的实施方案。基于系统设计和化工流程优化等方面提出的创新,开发出新一代美观、实用、安全的多功能燃料电池测试平台。

空间三结砷化镓太阳电池的激光防护研究

激光技术在空间中的广泛应用,增加了航天器太阳电池阵受激光辐照的可能性。为了解决激光损伤太阳电池的问题,搭建了激光辐照太阳电池实验平台,研究了激光对空间三结砷化镓太阳电池的损伤效应,并设计了一种针对1 064 nm激光的防护盖片,可使防护波段的能量衰减94%以上,实验验证了该盖片能够实现空间三结砷化镓太阳电池的激光防护。

燃料电池堆测试平台温控系统研究进展与趋势

为了评估燃料电池堆设计与优化的结果,许多研究探讨了燃料电池堆测试平台在测试燃料电池性能方面的关键作用,结果表明:通过测试平台可以获得燃料电池堆功率密度和寿命等重要信息,推动燃料电池技术的发展。温度是影响性能测试的重要因素,为此,首先阐述了测试平台的基本组成和设计开发进展,然后从建模和控制两个方面介绍了测试平台温度管理模块的研究现状,最后展望了测试平台未来的发展方向。

背压阀对燃料电池测试平台空气供给系统的影响

研究了燃料电池系统测试平台空气供给系统背压阀的选取,目的是改善空气系统的动态响应特性。以15 k W燃料电池系统测试平台为例,给出系统相关参数的计算方法,对比分析了不同流量特性背压阀对空气供给系统的影响,对比了同一背压阀对不同功率系统特性的影响和不同背压阀对同一系统特性的影响。采用已发表文献中的试验数据搭建了燃料电池系统模型并进行了开环压力控制系统动态响应特性的仿真,结果表明等百分比型背压阀更适合系统需求,适当选取Kv值(流量系数)较小的背压阀可以改善系统的调节精度,但对系统压力动态响应特性影响不大。

地铁信号系统后备电源修复可行性研究

针对广州地铁1号线信号系统后备电源出现蓄电性能下降及蓄电池电压过低的问题,提出在自主搭建的充放电平台上,采用深度充放电的方法,通过实时在线监测修复后带负载放电的蓄电池储电性能,证明该方法可以有效修复镍镉铅蓄电池储电性能下降及蓄电池电压过低的问题。

Research on the On-line Monitoring System of Battery Power

Through the comparison of various acquisition technology and related technology theory of the existing scheme, the paper analyze and design the power battery testing platform of the data acquisition system, and give the research design scheme of the utility model through the design of the software on PC and CAN bus, which makes the full synchronization requirements acquisition unit; improve the linearity and stability of total voltage and current acquisition by the integrated circuit, and improve the system sampling rate, effectively complete the corresponding index. Finally, through experimental verification, to ensure the completion of the technical indicators.

Interfacial thermodynamics-inspired electrolyte strategy to regulate output voltage and energy density of battery chemistry

The electrochemical behaviors of battery chemistry,especially the operating voltage,are greatly affected by the complex electrode/electrolyte interface,but the corresponding basis understanding is still largely unclear.Herein,the concept of regulating electrode potential by interface thermodynamics is proposed,which guides the improvement of the energy density of Zn-MnO_(2) battery.A cationic electrolyte strategy is adopted to adjust the charge density of electrical double layer,as well as entropy change caused by desolvation,thus,achieving an output voltage of 1.6 V(vs.Zn^(2+)/Zn)and a capacity of 400 mAh g^(-1).The detailed energy storage behaviors are also analyzed in terms of crystal field and energy level splitting.Furthermore,the electrolyte optimization benefits the efficient operation of Zn-MnO_(2) battery by enabling a high energy density of 532 Wh kg^(-1) based on the mass of cathode and a long cyclic life of more than 500 cycles.This work provides a path for designing high-energy-density aqueous battery via electrolyte strategy,which is expected to be extended to other battery systems.

A unique co-recovery strategy of cathode and anode from spent LiFePO_(4) battery

Along with the explosive growth in the market of new energy electric vehicles,the demand for Li-ion batteries(LIBs)has correspondingly expanded.Given the limited life of LIBs,numbers of spent LIBs are bound to be produced.Because of the severe threats and challenges of spent LIBs to the environment,resources,and global sustainable development,the recycling and reuse of spent LIBs have become urgent.Herein,we propose a novel green and efficient direct recycling method,which realizes the concurrent reuse of LiFePO_(4)(LFP)cathode and graphite anode from spent LFP batteries.By optimizing the proportion of LFP and graphite,a hybrid LFP/graphite(LFPG)cathode was designed for a new type of dualion battery(DIB)that can achieve co-participation in the storage of both anions and cations.The hybrid LFPG cathode combines the excellent stability of LFP and the high conductivity of graphite to exhibit an extraordinary electrochemical performance.The best compound,i.e.,LFP:graphite=3:1,with the highest reversible capacity(~130 mAhg^(-1) at 25 mAg^(-1)),high voltage platform of 4.95 V,and outstanding cycle performance,was achieved.The specific diffusion behavior of Li^(+) and PF_(6)^(-) in the hybrid cathode was studied using electrode kinetic tests,further clarifying the working mechanism of DIBs.This study provides a new strategy toward the large-scale recycling of positive and negative electrodes of spent LIBs and establishes a precedent for designing new hybrid cathode materials for DIBs with superior performance using spent LIBs.