ESCL_에너지저장변환 실험실

Energy Storage Conversion Lab.

Publication

International

Comparison of internal parameters varied by environmental tests between high-power series/parallel battery packs with different shapes
Content type 2019
Title of paper Comparison of internal parameters varied by environmental tests between high-power series/parallel battery packs with different shapes
Author Chang-O Yoon, Pyeng-Yeon Lee, Minho Jang, Kisoo Yooc, Jonghoon Kim
Publications Journal of Industrial and Engineering Chemistry
Status of publication published
Vol 71
Link 관련링크 https://www.sciencedirect.com/science/article/pii/S1226086X18314655 65회 연결

This study elaborately analyzes the lithium-ion battery pack in series and parallel connection installed in

space applications through environmental tests that typically composed of three tests: half-sine shock,

sine vibration and random vibration. These tests are well conducted based on the internal certification

standard and the space industry standard. Above all, from basic equivalent electrical circuit modeling of

the high-power 18650-HE4 cell based series/parallel battery packs of 4S4P with rectangular and cube

types, some internal parameters were minutely extracted and compared to check which environmental

test adversely affects the battery pack’s electrochemical characteristics and its electrical performance.

Moreover, maximum/minimum cell voltages and their differences measured in four series point and

internal temperature measured in

five points inside the two battery packs are compared. For reference, in

order to analyze the impact of the battery pack clearly, this study further analyzed some single cells with

various impacts through identical environmental test profiles. Above analyses and comparisons can help

to get a solution for

finding a suitable shape for space application with a parameter change rate according

to the different shape of the battery pack. In particular, the necessity of a modified equivalent electrical

circuit modeling of the battery pack varied by environmental tests can be sufficiently suggested. Accurate

information on internal parameters of the cell and battery pack contributes to the high-fidelity state-ofcharge

(SOC) estimation and state-of-health (SOH) prediction in vibration and shock environments such

as electric vehicle (EV), satellites and space-launch vehicles.