Utilization of the battery recovery effect in hybrid and electric vehicle applications

Baumgardt, Andreas; Bachheibl, Florian; Gerling, Dieter

doi:10.1109/icems.2014.7013474

Cited by 10 publications

(2 citation statements)

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“…A better idea is to cyclically alternate discharge intervals with inactive periods, during which charge recovery is exploited. Setting a duty cycle involves a tradeoff between intense battery usage for a limited period of time, and extended operation time by exploitation of the recovery effect, at the price of not always using the battery, even when needed [8]. Also, note that the recovery effect cannot be exploited indefinitely, since when a new equilibrium of the active materials is reached, the recovery ceases to bring any benefit.…”

Section: Background On Battery Non-idealitiesmentioning

confidence: 99%

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A Markov Model Accounting for Charge Recovery in Energy Harvesting Devices

Badia

Feltre

Gindullina

2017

2017 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)

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Energy harvesting is an important feature that can be implemented in mobile devices to provide them with extended autonomy, yet it poses several challenges in terms of optimal battery usage. In this paper, we highlight that some non-ideal effects, especially the so-called "charge recovery," can have a dramatic impact on the operation policy of autonomous devices. To do so, we construct a Markov model, where we introduce a bidimensional battery value, including the apparent energy level, which is what available at the electrodes to power the device, and the actual energy level stored in the battery. When power is not drained by the device, these levels tend to equalize due to charge recovery, but, in the case of intense battery usage, they can be significantly different. We show that this non-ideality leads to considerably different estimates of undesirable events such as battery outages, and may cause a general underutilization of the devices if not properly accounted for.

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Section: Background On Battery Non-idealitiesmentioning

confidence: 99%

“…An example is leakage [7], causing the battery level to decrease even in the absence of transmissions. An even more complicated phenomenon is the so-called charge recovery effect [8], [9], according to which the battery level apparently raises when no energy is drained.…”

Section: Introductionmentioning

confidence: 99%