Enhancement Of Li-Ion Battery Performance At Low Temperatures By Dc-Dc Converter Duty-Cycle Autotuning

Keywords

DC-DC converter; Internal resistance; Li-ion battery; Power; Temperature

Abstract

In most battery applications, the battery is designed to meet specific load requirements within an operating temperature window. At low temperatures, i.e. below freezing point, the battery performance degrades significantly due to electrolyte freezing. As a result, the battery capability of delivering required power to the load falls. This paper proposes a method to maximize the power that can be extracted from a battery at low temperatures. The method is based on operating the DC-DC converter at the input voltage which maximizes the discharge-power of the battery. This is achieved by allocating the maximum-power voltage at the input to the converter that will maximize the power discharged by the battery. Method details and experimental results using a 3.6V/1100mAh lithium-ion (Li-ion) battery cell are presented.

Publication Date

12-3-2018

Publication Title

2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Number of Pages

2115-2119

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/ECCE.2018.8557971

Socpus ID

85060300983 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85060300983

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