Fundamentals and Application of Lithium-ion Batteries in by Jiuchun Jiang, Caiping Zhang

By Jiuchun Jiang, Caiping Zhang

A theoretical and technical consultant to the electrical car lithium-ion battery administration system

Covers the well timed subject of battery administration structures for lithium batteries. After introducing the matter and easy history concept, it discusses battery modeling and kingdom estimation. as well as theoretical modeling it additionally comprises sensible info on charging and discharging keep an eye on know-how, cellphone equalisation and alertness to electrical autos, and a dialogue of the foremost applied sciences and learn equipment of the lithium-ion energy battery administration system.

The writer systematically expounds the speculation wisdom integrated within the lithium-ion battery administration platforms and its functional software in electrical automobiles, describing the theoretical connotation and useful software of the battery administration structures. chosen pics within the publication are at once derived from the true motor vehicle assessments. via comparative research of the several process constructions and diversified image symbols, similar recommendations are transparent and the certainty of the battery administration structures is enhanced.

Contents include: key applied sciences and the trouble aspect of car strength battery administration process; lithium-ion battery functionality modeling and simulation; the estimation thought and techniques of the lithium-ion battery country of cost, country of strength, nation of future health and top energy; lithium-ion battery cost and discharge keep watch over know-how; constant assessment and equalization recommendations of the battery pack; battery administration approach layout and alertness in electrical vehicles.

  • A theoretical and technical consultant to the electrical automobile lithium-ion battery administration system
  • Using simulation expertise, schematic diagrams and case reports, the elemental thoughts are defined truly and provide specific research of battery cost and discharge keep an eye on principles
  • Equips the reader with the certainty and proposal of the facility battery, delivering a transparent cognition of the appliance and administration of lithium ion batteries in electrical vehicles
  • Arms audiences with plenty of case studies

Essential studying for Researchers and execs operating in strength applied sciences, software planners and method engineers.

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Additional info for Fundamentals and Application of Lithium-ion Batteries in Electric Drive Vehicles

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The closer the value of R2 (or R) is to 1, the better the screening of the battery in parallel, as shown as follows: N X R2 = 1 − ( At = At 2 t=1 N X It − I , 2 2 28 t=1 0, I − ΔI ≤ It ≤ I + ΔI min It −I ± ΔI , It ≤ I − ΔI It ≥ I + ΔI The battery pack modeling analyzes series and parallel battery equivalent circuit models based on the basic electrical equivalent circuit, and the differential equations are obtained from the series and parallel topological structure of the circuit equation. The Simulink models are built to realize the simulation of the charging and discharging processes of the series or parallel battery packs by using the model parameters identified by experiment.

In this area, the rate of chemical reaction is relatively stable, and the flow of ions and electrons inside the battery reaches equilibrium substantially, so the voltage of the battery falls slowly. In the cutoff area, the voltage of the battery falls rapidly and the voltage of polarization increases rapidly. After a short time of discharging the voltage of the battery drops to a cutoff voltage. The total discharging capacity and cutoff voltage can be measured in this area. Thus, we can consider three points on the curve: Vfull is the initial voltage when discharging at the fully charged state, excluding the open-circuit voltage after fully charged; Vexp is the terminal voltage in the exponential area; Vnom is the finishing voltage in the plateau area during the discharging process.

9 that the EIS plot is an approximate semicircle in the first quadrant and an approximate straight line in the fourth quadrant. The EIS at high frequency being an approximate straight line in the fourth quadrant may result from inductance. The voltage response lagged the current of the tested battery systems, exhibiting the property of inductance. The presence of this inductance is not caused by the induced current inside the battery, but is due to the physical nature of the electrodes, such as the porosity, surface unevenness, and so on.

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