Road vehicles—Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles—Part 3: Mechanical loads
Road vehicles - Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles -
Part 3: Mechanical loads
1 Scope
This document specifies requirements for the electric propulsion systems and components with maximum working voltages according to voltage class B. It describes the potential environmental stresses and specifies tests and mechanical load requirements recommended for different stress levels on/in the vehicle.
This document applies to the electric propulsion systems and components with maximum working voltages according to voltage class B. It does not apply to high voltage battery packs (e.g. for traction) and systems or components inside.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2423.5 Environmental testing - Part 2: Test methods - Test Ea and guidance: Shock (GB/T 2423.5-2019, IEC 60068-2-27: 2008, IDT)
GB/T 2423.7 Environmental testing - Part 2: Test methods - Test Ec: Rough handling shocks, primarily for equipment-type specimens (GB/T 2423.7-2018, IEC 60068-2-31: 2008, IDT)
GB/T 2423.22 Environmental testing - Part 2: Tests methods - Test N: Change of temperature (GB/T 2423.22-2012, IEC 60068-2-14: 2009, IDT)
GB/T 2423.56 Environmental testing - Part 2: Test methods - Test Fh: Vibration, broadband random and guidance (GB/T 2423.56-2018, IEC 60068-2-64: 2008, IDT)
GB/T 2423.58 Environmental testing for electric and electronic products - Part 2: Tests - Test Fi: Vibration - Mixed mode (GB/T 2423.58-2008, IEC 60068-2-80: 2005, IDT)
GB/T 28046.1 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 1: General (GB/T 28046.1-2011, ISO 16750-1: 2006, MOD)
GB/T 42284.1 Road vehicles - Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles - Part 1: General (GB/T 42284.1-2022, ISO 19453-1: 2018, MOD)
GB/T 42284.4-2022 Road vehicles - Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles - Part 4: Climatic loads (ISO 19453-4: 2018, MOD)
ISO 20567-1: 2017 Paints and varnishes - Determination of stone-chip resistance of coatings - Part 1: Multi-impact testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 28046.1 and GB/T 42284.1 apply.
4 Tests and requirements
4.1 Vibration
4.1.1 General
The vibration test methods specified consider various levels of vibration severities applicable to on-board electrical and electronic equipment. The customer and the supplier may choose the test method, environmental temperature and vibration parameters depending on the specific mounting location.
The specified values are the best estimation one can get up to the moment when results from measurements in the vehicle are received, but they do not replace a vehicle measurement. The specified values apply to direct mounting in defined mounting locations. The use of a bracket for mounting can result in higher or lower loads. Vibration tests shall be carried out according to actual vehicle conditions.
Carry out the vibration with the DUT suitably mounted on a vibration table. The mounting method(s) used shall be noted in the test report. Carry out the frequency variation by logarithmic sweeping of 0.5 oct/min for the sinusoidal vibration and the sinusoidal vibration part of sine-on-random tests. The scope of the recommended vibration tests is to avoid malfunctions and breakage mainly due to fatigue in the field. Testing for wear has special requirements and is not covered in this document. Loads outside the designated test frequency ranges shall be considered separately.
Note: Deviations from the load on the DUT can occur, should vibration testing be carried out according to this document on a heavy and bulky DUT, as mounting rigidity and dynamic reaction on the vibrator table excitation are different compared to the situation in the vehicle. Such deviations can be minimized by applying the average control method (see Annex A, A.3).
