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System-Level RESS Safety and Protection Test Procedure Development, Validation, and Assessment–Final Report
Record #: 1 of 44
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  • Published Date:
    2019-10-01
  • Language:
    English
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System-Level RESS Safety and Protection Test Procedure Development, Validation, and Assessment–Final Report
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    Final Report
  • Abstract:
    The automotive application of electric propulsion in Hybrid Electric Vehicles (HEV), Plug-in Hybrid Electric Vehicles (PHEV) and Electric Vehicles (EV) relies on the application of a Rechargeable Energy Storage System (RESS) commonly referred to as a battery. In addition to the RESS itself, a Battery Management System (BMS) is an integral component of a vehicle’s overall energy storage system. The BMS serves a variety of functions to incorporate a RESS into the larger system, but its primary function is to monitor and protect the RESS while communicating battery relevant system-level information to other parts of a vehicle’s control system. With a specific focus on safety and RESS protection, the BMS is responsible monitoring the safety state of the battery system, while protecting the battery from operating outside its safe operating area. Under certain conditions, the BMS may need to actuate a switching device (typically referred to as contactors) to physically separate the RESS from conditions that are pushing the battery outside its normally safe operating conditions. The automotive application and use of a RESS, such as a Lithium-ion (Li-ion) based battery system, poses certain potential risks to vehicle operators and occupants. These potential risks are different than those associated with internal combustion engine equipped vehicles. Many of these risks are associated with hazards and failure modes created when the battery exceeds its recommended operational limitations including those that are managed by active control algorithms programed into the BMS. The test procedures referenced in this report have been independently developed based on commonly accepted single point failure modes (1.3.4) and hazards related to battery technology and the ability of a BMS to effectively detect and mitigate certain safety relevant occurrences during operation. This report documents a research project to independently evaluate, refine and validate these test procedures for use within a vehicle-level set of tests that can be robustly applied to a wide range of vehicle technologies and battery configurations.

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