Safety Management of Automotive Rechargeable Energy Storage Systems: The Application of Functional Safety Principles to Generic Rechargeable Energy Storage Systems

Two approaches, Hazard and Operability Analysis and System Theoretic Process Analysis, were used to evaluate hazards associated with automotive rechargeable energy storage systems (RESSs). The analyses began with the construction of an appropriate block diagram of RESS functions and the identification of potential malfunctions. The risks associated with the hazards were assessed with the Hazard Analysis and Risk Assessment protocols, and automotive safety integrity levels were assigned. The analyses considered RESS thermal events, cell venting and release of explosive and/or toxic chemicals, high-voltage exposure (possible electrocution), and loss of high-voltage power leading to unintended deceleration. The analyses also considered other potential issues but determined that some would only occur through an external failure not directly attributable to the RESS and was therefore out of scope. The functional safety components of the ISO 26262 process were used to develop “Functional Safety Requirements” (one output of the ISO 26262 process) to help analyze and prevent/mitigate hazards.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 83p

Subject/Index Terms

Filing Info

  • Accession Number: 01698655
  • Record Type: Publication
  • Report/Paper Numbers: DOT-VNTSC-NHTSA-15-01, DOT HS 812 556
  • Contract Numbers: DTNH22-12-V-00090; HS2BA1
  • Created Date: Feb 25 2019 1:09PM