Title :
Passive Equalization and the Expiration of Battery Packs on Chinese Electric Bicycles
Author :
Weili Ke ; Zhang, Ning
Author_Institution :
Jiangsu TV Univ., Nanjing
Abstract :
Passive equalization is applied on valve-regulated lead-acid (VRLA) battery packs of electric bicycles in China. Short cycle life of VRLA battery packs is a big problem for Chinese electric bicycle business. The cycle life of the VRLA battery packs is much shorter than a single battery´s although batteries were tested and paired before operating. In 95% of all failed battery packs, only one battery is dysfunctional. Overcharge and over-discharge are the primary factors for the failures of VRLA battery packs. Passive equalization cannot guarantee that the batteries do not over-charge or over-discharge.
Keywords :
battery powered vehicles; bicycles; lead acid batteries; Chinese electric bicycles; VRLA; passive equalization; valve-regulated lead-acid battery packs; Batteries; Bicycles; Cities and towns; Electric motors; Laboratories; Life testing; Manufacturing; TV; Voltage; Warranties;
Conference_Titel :
Industrial Electronics and Applications, 2007. ICIEA 2007. 2nd IEEE Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-0737-8
Electronic_ISBN :
978-1-4244-0737-8
DOI :
10.1109/ICIEA.2007.4318630
