난이도 & 준비물
증상
제너레이터(올터네이터)가 풀 부하(송풍기, 에어컨, 라이트 등) 상태에서 13.5V를 출력하고 있으나, 시가렛 라이터 포트의 전압은 송풍기 작동 시 11.6V까지 떨어짐. 송풍기 미작동 시에는 12.8~13.0V 범위. 자동차 배터리가 매년 방전되고 배터리 내부 수분이 계속 감소하는 현상 발생. 배터리 터미널에서 전압은 13.5V로 정상이지만, 배터리 터미널과 내부 배선 사이에 높은 저항이 있는 것으로 의심됨.
처리 내용
13.5V는 배터리 터미널에서도 낮은 수치임. 투-와이어 올터네이터(2선식)인 경우 올터네이터 출력 터미널에서는 훨씬 더 낮을 수 있음. 별도의 시그널 와이어가 있다면 투-와이어 방식이 아님. 가능하면 배터리 터미널의 전압을 1V 높여 14.5V로 조정할 것을 권장함. 이는 전압 레귤레이터 교체가 필요할 수 있음. 13.5V는 상온에서 24시간 연속 충전 시 배터리에 겨우 충분한 수준임. 엔진 시동 후 1시간 정도만 충전되는 사이클링 패턴이 있다면 13.5V는 너무 낮음. 결론적으로 문제는 전압이 너무 높은 것이 아니라 너무 낮다는 것임. 배터리는 더 많은 충전이 필요하지, 더 적은 충전이 필요한 것이 아님.
출처
이 사례는 Stack Exchange (미국)에서 수집한 데이터입니다.
신뢰도 4.1점(높음) — 출처 소스의 전문성/검증구조를 기준으로 산정된 점수이며, 정확성을 보장하지 않습니다.
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