Alternative Approach to UN R13 Type-IIA for Battery Electric Vehicles

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Presentation transcript:

Alternative Approach to UN R13 Type-IIA for Battery Electric Vehicles Submitted by the experts from OICA and CLEPA Informal document GRVA-01-27 1st GRVA, 25-28 September 2018 Agenda item 8 (c) Alternative Approach to UN R13 Type-IIA for Battery Electric Vehicles OICA – CLEPA GRVA-01 - September 2018 V1.2

Technical background UN R13 - Type-II and IIA tests Downhill Behaviour Test Type-IIA Endurance Braking Performance Test 6% 30km/h 6 km 7% 30km/h 6 km Scope M3 and N3 Except vehicles submitted to Type-IIA Service brake: no restriction Pass criteria: Hot-stop performance after Type-II N3: 3.3 m/s² M3: 3.75m/s² Scope M3 class II, III & B N3 ADR and/or authorized to tow cat. O4 Service brake: prohibited Pass criteria: Average speed of 30km/h (+/- 5 km/h)

Technical background UN R13 – Definition of SoC * * State of charge 2.21.4. “Electrical state of charge” means the instantaneous ratio of electric quantity of energy stored in the traction battery relative to the maximum quantity of electric energy which could be stored in this battery; + _ 0% + _ 50% + _ 100% SoC

Technical background Description of the issue BEV 7% 30km/h 6 km General: UN R13 Type-IIA test is not adapted to Battery Electric vehicles (BEV) technology. Technical issue: Technical Services requires Type-IIA to be conducted with a fully charged traction battery (i.e. the worst case). In these conditions: The kinetic energy of the vehicle cannot be converted and stored in the traction battery, No endurance braking is available. Type-IIA cannot be passed without complex technical solutions highly impacting weight, packaging and cost, e.g. resistors and high-temp cooling system, extra batteries.  Such solutions kill the economical interest of BEV technology. Type-IIA not feasible An alternative approach is needed for BEVs

Alternative to Type IIA Principles No change for vehicles not equipped with an ERB system BEV & Hybrid vehicles * * M3 class II, III & B + N3 ADR and/or authorized to tow cat. O4, equipped with an ERB system of cat A or B Current way Alternative approach Type-IIA Type-II + Type-IIA + Brake estimator Warn the driver if performance is below Type-II hot- stop requirements: N3 = 3.3 m/s² M3 = 3.75m/s² 30 +/-5km/h hot-stop requirements: N3 = 3.3 m/s² M3 = 3.75m/s² 30 +/-5km/h