Design Of Sealed Lead Acid Battery For Electric Bicycle

The main disadvantages of sealed lead acid battery for electric bicycle involves:premature capacity loss, cycle life decrease, the consistency of batteries and battery groups.The file Entry Criteria for Lead Battery Industry has made it clear that lead battery as well asits lead-containing components, if the Cd amount measured in which exceeds0.002%, shouldbe eliminated from the market; and that the adoption of outer formation process in newlyestablished or re-constructed, re-expanded projects is prohibited.The6-DZM-20battery is in big market demand but has a comparatively short life. Butafter an optimization of the produce process, together with a redesign of the battery structure,the specific energy can get increased and the cycle life of the battery can also be lengthened.And we’d like to point out that in the article:(1) materials used in making the plate, suchas electrolytic lead, lead powder, wet lead paste and dry lead paste, all have a quantitativerelationship with each other and these relationships are presented in the article in formulas;(2)the plate group is designed according to parameters of the shape and size of the battery andthe utilization of active materials as well;(3)the battery grids are designed through the use ofthe pro/E software; and (4) the volume of the acid which the plate group is able to absorb isworked out through the revised Dispersion Method so as to help design the battery. These fourmentioned design proposals all help to lengthen the cycle life of the battery.And, through using high-tin Lead-Ca alloy to cast the grids; making the lead paste at ahigh temperature with the addition of compound additives and then curing the plate group at amiddle temperature and thus the amount of tetrabasic lead sulfate(4BS) gets increased in theplate; adding gel to the electrolyte of the low-liquid type AGM battery and keep it in a gelstate; and controlling strictly the acid amount of the plate group to maintain the utilization ofpositive and negative active materials at a slightly low level, which are all measures we takeduring produce, we can manage to lengthen the service life of the battery.Moreover, by adopting process route including reducing the amount of the activematerial of the negative terminal and the weight of the slab gate and choosing a propercontainer formation process, we are able to increase the specific energy and the utilization ofactive materials.To summarize, the6-DZM-20Battery which is produced according to the designintroduced in the article has a specific energy by weight amounting to34.1Wh/kg; and abattery group has a service life up to309times of charging and discharging. Theseperformances of the battery will surely better meet the needs of so many electric bicycleusers.