1Determination of 1,3-propanesultone in lithium ion battery and lithium ion battery electrolyte by gas chromatography/mass spectrometry-selected ion monitoring techniqueWANG Cheng-yun, YANG Zuo-jun, LONG Bin, GU Hao-fei, LIU Yi, XU RongResearch and technology171-1752Design and simulation of a 5kW battery charger systemTIAN Ye, GUO Ke-gui, WANG Yang, SUN He, WANG KeResearch and technology176-1793Research on internal corrosion mechanism of soft-coated lithium ion batteryZHU Lin-jian, MA Hong-tao, LIU Xing-dan, GAO Hong-yan, ZHAO Hong-juan, NI Ya-qiongResearch and technology180-1814Discussion on the parallel/series use of lead-acid batterySONG Jiang-songResearch and technology182-1865Study on the portable multifunction mobile power supply of lithium ferric phosphateYIN Jing-wen, ZHANG Gui-fengResearch and technology187-1906Analysis of three 18650 cell in altitude simulation testsWANG Hong-wei, DENG Shuang, LIU JunResearch and technology191-1937Preparation and carbon modification of Li4Ti5O12 materialSUN Pei-liang, CHEN Shi-juan, QIN KaiResearch and technology194-1988CFD simulation and experiment on liquid cooling system of Ni-MH battery pack for HEVZHAI Li-xue, CHU Ai-hua, ZHANG TongResearch and technology199-2039Banding the Li-ion batteries by voltageMO Zhi-boResearch and technology204-20610Analysis on the influential factors of electrical performance test results of lithium-ion traction batteryGONG Ming-guang, ZHU Qiang, LIANG Meng-chenResearch and technology207-21111Precharge parameter matching and application of high voltage power batteryZHOU Quan, CHU Ai-hua, ZHANG TongResearch and technology212-21512Research progress of graphene coated lithium cobalt nickel manganese oxide cathode materialsCHEN Yu-hong, ZHANG Bing-zhuReview216-21813Analysis of current situation and countermeasures to waste battery treatmentsMENG Da-wei, MA Shuai-yu, ZHANG Zhi-yongReview219-223