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Design of Over Current Sequence Control Algorithm According to Lithium Battery Fuse Temperature Compensation

리튬 배터리 퓨즈 온도 보상에 따른 과전류 시퀀스 제어 알고리즘 설계

  • Song, Jung-Yong (Department of Electrical Engineering, Inha University) ;
  • Huh, Chang-Su (Department of Electrical Engineering, Inha University)
  • 송정용 (인하대학교 전기공학과) ;
  • 허창수 (인하대학교 전기공학과)
  • Received : 2018.08.21
  • Accepted : 2018.09.09
  • Published : 2019.01.01

Abstract

Lithium-ion batteries used for IT, automobiles, and industrial energy-storage devices have battery management systems (BMS) to protect the battery from abnormal voltage, current, and temperature environments, as well as safety devices like, current interruption device (CID), fuse, and vent to obtain positive temperature coefficient (PTC). Nonetheless, there are harmful to human health and property and damage the brand image of the manufacturer because of smoke, fire, and explosion of lithium battery packs. In this paper, we propose a systematic protection algorithm combining battery temperature, over-current, and interconnection between protection elements to prevent copper deposition, internal short circuit, and separator shrinkage due to frequent and instantaneous over-current discharges. The parameters of the proposed algorithm are suggested to utilize the experimental data in consideration of battery pack operating conditions and malicious conditions.

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Fig. 1. Block diagram of the battery management system.

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Fig. 2. Advanced over current protection and alarm region.

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Fig. 3. Discharge voltage and current profile at each condition with FET and cell temperature.

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Fig. 4. Over current protection alarm by terminal wiring.

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Fig. 5. Power derating by CFP.

Table 1. Specification of the battery pack.

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Table 2. Parameters of advanced over current protection algorithm.

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