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Sandeep Dhameja's Electric Vehicle Battery Systems PDF

By Sandeep Dhameja

ISBN-10: 0750699167

ISBN-13: 9780750699167

Electrical car Battery structures presents operational concept and layout assistance for engineers and technicians operating to layout and strengthen effective electrical car (EV) energy resources. As 0 Emission cars turn into a demand in additional components of the area, the know-how required to layout and continue their advanced battery structures is required not just by means of the automobile designers, yet through those that will supply recharging and upkeep companies, in addition to application infrastructure companies. comprises gasoline mobile and hybrid motor vehicle applications.

Written with fee and potency most advantageous in brain, electrical car Battery platforms deals crucial info on failure mode research of VRLA, NiMH battery structures, the fast-charging of electrical automobile battery platforms according to Pb-acid, NiMH, Li-ion applied sciences, and lots more and plenty extra. Key insurance comprises matters which can impact electrical car functionality, akin to overall battery capability, battery charging and discharging, and battery temperature constraints. the writer additionally explores electrical motor vehicle functionality, battery checking out (15 center functionality exams provided), lithium-ion batteries, gasoline cells and hybrid autos. that allows you to make a realistic electrical motor vehicle, a radical realizing of the operation of a collection of batteries in a pack is important. Expertly written and researched, electrical motor vehicle Battery structures will turn out beneficial to automobile engineers, electronics and built-in circuit layout engineers, and someone whose pursuits contain electrical autos and battery systems.

* Addresses fee and potency as key parts within the layout process
* presents accomplished insurance of the speculation, operation, and configuration of complicated battery structures, together with Pb-acid, NiMH, and Li-ion technologies
* offers finished assurance of the idea, operation, and configuration of complicated battery platforms, together with Pb-acid, NiMH, and Li-ion applied sciences

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Additional info for Electric Vehicle Battery Systems

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CAPACITY DISCHARGE TESTING OF VRLA BATTERIES As recommended by most manufacturers and also industry standards (IEEE 450), a VRLA battery should be replaced if it fails to deliver 80% of its rated capacity. There is a very simple reason for the 80% of the rated capacity value. Based on the typical battery life curve of a lead-acid battery, once the battery capacity begins to deteriorate, the fall-off occurs at a rapid rate. A fully balanced, new traction battery pack will exhibit up to 95% of its rated capacity upon delivery because the active material on the battery plates are still undergoing formation.

Another common failure is due to discharge of the negative plate over a period of time. This occurs owing to the high recombination efficiency of the battery. As the battery continues to age, the recombination efficiency continues to improve (greater that 98% in some cases). The oxygen released at the positive plate, during the charging process, is absorbed by the negative plate. This reduces the spongy lead active material and prevents the negative plates from reaching the fully charged state.

Excessive oxidation, can result in an overall decrease in conductivity or an isolation of powder particles. Extensive battery oxidation occurs upon exposure to the electrolyte. Oxidation causes lower specific capacity, decreased rate capability, decreased charging efficiency, slower gas recombination, and ultimately, NiMH cell failure. Effects of Elevated Temperatures on VRLA Battery Formation Formation temperature affects the structure of the sponge lead (active material) of Pb-acid traction batteries.

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Electric Vehicle Battery Systems by Sandeep Dhameja


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