하이브리드 자동차 사용 후 배터리 재사용을 위한 BMS 연동 평가 장비 개발에 관한 연구
A Study on the Development of BMS-linked Evaluation Equipment for Second-life Reuse of Hybrid Vehicle Battery
This study presents a standalone diagnostic device for HEV high-voltage battery packs that communicates directly with the BMS outside the vehicle and enables quantitative verification of BMS SOC and SOH outputs. The prototype, developed for a Renault CMA HEV pack, activates the BMS via the low-voltage harness, reads key variables such as SOC, SOH, cell voltage and temperature, and pack voltage and current over CAN, and safely controls the pack’s high-voltage relay. Using a pack reported as 100% SOH by the BMS, constant- current discharge at about a 0.1 C-rate was performed in the SOC range from 30% to 45%, and for 5, 10 and 15-minute segments the usable energy estimated from the BMS SOC and the rated capacity showed mean values around 1.54kWh with a coefficient of variation of approximately 2-3%. The proposed BMS-linked evaluation equipment estimates the usable capacity within a tolerance consistent with the manufacturer’s nominal specification and can serve as a practical basis and tool for second-life evaluation of used high voltage battery packs.
목차
Abstract 1. 서론 2. 진단장비 구성 및 제작 2.1 고전압 배터리팩 분석 및 진단 요구 사항 2.2 시스템 전체 구성 2.3 BMS 통신과 릴레이 제어 및 절연설계 3. 기능구현 및 검증 평가 3.1 시험 평가 구성 및 데이터 취득 3.2 SOC 기반 용량 추정과 실제 방전 용량 비교 3.3 유효 용량 반복 측정 결과 및 Gage R&R관점 고찰 후기 References