화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.31, No.2, 75-83, February, 2021
DOI10.3740/MRSK.2021.31.2.75  Export Citation
Sand-Blasting법을 이용한 활물질/기판간 결합력 향상에 따른 AGM 연축전지의 성능 및 충방전 거동
Performance and Charging-Discharging Behavior of AGM Lead Acid Battery according to the Improvement of Bonding between Active Material/Substrate using Sand-Blasting Method
김성준1, 2, 임태섭1, 김봉구2, 손정훈2, 정연길2, †
  • 1세방전지㈜
  • 2창원대학교 신소재공학과
Sung Joon Kim1, 2, Tae Seop Lim1, Bong-Gu Kim2, Jeong Hun Son2, and Yeon Gil Jung2, †
  • 1Sebang Global battery Co., Ltd., Changwon, Republic of Korea
  • 2School of Nano & Advanced Materials Eng., Changwon National Univ., Changwon, Republic of Korea
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To cope with automobile exhaust gas regulations, ISG (Idling Stop & Go) and charging control systems are applied to HEVs (Hybrid Electric Vehicle) for the purpose of improving fuel economy. These systems require quick charge/discharge performance at high current. To satisfy this characteristic, improvement of the positive electrode plate is studied to improve the charge/discharge process and performance of AGM(Absorbent Glass Mat) lead-acid batteries applied to ISG automotive systems. The bonding between grid and A.M (Active Material) can be improved by applying the Sand-Blasting method to provide roughness to the surface of the positive grid. When the Sand-Blasting method is applied with conditions of ball speed 1,000 rpm and conveyor speed 5 M/min, ideal bonding is achieved between grid and A.M. The positive plate of each condition is applied to the AGM LAB (Absorbent Glass Mat Lead Acid Battery); then, the performance and ISG life characteristics are tested by the vehicle battery test method. In CCA, which evaluates the starting performance at -18 oC and 30 oC with high current, the advanced AGM LAB improves about 25 %. At 0 oC CA (Charge Acceptance), the initial charging current of the advanced AGM LAB increases about 25 %. Improving the bonding between the grid and A.M. by roughening the grid surface improves the flow of current and lowers the resistance, which is considered to have a significant effect on the high current charging/discharging area. In a Standard of Battery Association of Japan (SBA) S0101 test, after 300 A discharge, the voltage of the advanced AGM LAB with the Sand-Blasting method grid was 0.059 V higher than that of untreated grid. As the cycle progresses, the gap widens to 0.13 V at the point of 10,800 cycles. As the bonding between grid and A.M. increases through the Sand Blasting method, the slope of the discharge voltage declines gradually as the cycle progresses, showing excellent battery life characteristics. It is believed that system will exhibit excellent characteristics in the vehicle environment of the ISG system, in which charge/discharge occurs over a short time.
Keywords:AGM lead acid battery;sand-blasting;HEV;ISG
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