Cell balancing techniques for Li-ion batteries in healthcare devices

Nawaz, Menaa; Ahmed, Jameel; Khan, Muhammad Shahbaz

doi:10.1109/gcwot53057.2022.9772908

Cited by 2 publications

(2 citation statements)

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“…Their large energy storage capacity [23] makes them more unstable than other batteries like lead-acid batteries, and they need to be closely monitored to make sure they stay within their safe working limits. According to the authors' documentation in [24], some cells in these battery packs have a different state of charge (SOC) than others. This is because temperature, leakage current, and self-discharge rates will become imbalanced after being subjected to multiple charge/discharge cycles.…”

Section: Introductionmentioning

confidence: 99%

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Switched-Resistor Passive Balancing of Li-Ion Battery Pack and Estimation of Power Limits for Battery Management System

Kumar

Rao

Singh

et al. 2023

International Journal of Energy Research

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The battery pack performance and expected lifespan are crucial in electric vehicle applications. Balancing the charge on a battery pack connected in series and parallel is crucial due to manufacturing discrepancies and distinct performance of each cell in a standard battery pack. In this paper, a switched-resistor passive balancing-based method is proposed for balancing cells in a battery management system (BMS). The value of the available voltage at the battery cell terminals is balanced using resistors in an electrical circuit, and the excess voltage is eliminated. The cell balancing outcome demonstrates that the electrical circuit can maintain an even voltage across each cell. The procedure of balancing involves individually adjusting each cell’s level of charge. Passive balancing releases energy as heat by draining charge from cells that have too much charge. A passive cell balancer is a cost-effective solution and easy to install, but due to thermal loss from a resistor, it has a low energy efficiency for cell balancing and necessitates a lengthy balancing process. This passive cell balancer is an effective and reliable method for low-power devices and portable applications such as electrical vehicles. The power limits during charging and discharging are estimated using the bisection method.

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Section: Introductionmentioning

confidence: 99%

“…In [24], the authors of the li-ion battery pack present an overview of converter-based cell balancing topologies. Approaches that use energy-efficient DC-DC converters to optimise cell balancing in medical devices are discussed.…”

Section: Introductionmentioning

confidence: 99%