Influence of Filling Density in the Positive Active-material on the Cycle-life Performance of the Tubular Type Gelled Valve Regulated Lead Acid Batteries

튜브식 겔형 납축전지에 있어서 활물질 밀도에 따른 싸이클 수명 특성

  • Yoon, Youn-Saup (Department of Chemical Technology, Changwon National University) ;
  • Kim, Byung-Kwan (Department of Chemical Technology, Changwon National University) ;
  • Lee, Soo (Department of Chemical Technology, Changwon National University) ;
  • Kim, Kyu-Tea (R & D Center of Global Hi-Tech Co., Ltd.)
  • 윤연섭 (창원대학교 공업화학과) ;
  • 김병관 (창원대학교 공업화학과) ;
  • 이수 (창원대학교 공업화학과) ;
  • 김규태 (세방하이테크(주)기술연구소)
  • Received : 1998.12.04
  • Accepted : 1999.04.08
  • Published : 1999.05.10

Abstract

The characteristics of VRLA (valve regulated Iead-acid) battery with the tubular positive plate and gel type electrolyte were examined as a function of active material filling density. The filling density of positive plate was 3.2 g/mL, 3.4 g/mL, and 3.6 g/mL, respectively. These VRLA batteries were cycled with 100% DOD (depth of discharge) at the $C_5/5$ rate, followed by IU-type recharge with $I_{max}=0.2C_{10}/10$ and a final voltage V=2.40 V/cell. The test was performed in a thermostatic room at $25{\pm}1^{\circ}C$. The result indicated that the initial capacity was independent of active material filling density, i.e., the highest initial capacity was 3.4 g/mL of filling density and the lowest was 3.6 g/mL. On aspect of the cycle-life performance of the VRLA battery, the filling density of 3.6 g/mL was similar to that of 3.4 g/mL in the positive plate, and both were higher than that of 3.2 g/mL. Water-loss and degradation of the VRLA battery were decreased according to an increase of the filling density in the positive plate. The optimum filling density of the active material was 3.4~3.6 g/mL.

Keywords

Gelled-electrolyte;Cycle-life;BESS;Tubular Positive Plate;VRLA Battery

Acknowledgement

Supported by : 산업자원부

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