Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p34
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 95399–98470

good mechanical condition and have been driven at least 300 km during seven days before the test.  The vehicle shall be equipped with the REESS subject to the test of hydrogen emissions, over this period.

       3.1.2. If the REESS is used at a temperature above the ambient temperature, the operator shall follow the manufacturer's procedure in order to keep the REESS temperature in normal functioning range.

        The manufacturer's representative shall be able to certify that the temperature conditioning system of the REESS is neither damaged nor presenting a capacity defect.

       3.2. Component based test

       3.2.1. The REESS shall be in good mechanical condition and have been subject to minimum of 5 standard cycles (as specified in Annex 8, Appendix 1).

       3.2.2. If the REESS is used at a temperature above the ambient temperature, the operator shall follow the manufacturer's procedure in order to keep the REESS temperature in its normal functioning range.

        The manufacturer's representative shall be able to certify that the temperature conditioning system of the REESS is neither damaged nor presenting a capacity defect

       Figure 7.1
       Determination of hydrogen emissions during the charge procedures of the REESS

       4. Test equipment for hydrogen emission test

       4.1. Chassis dynamometer

        The chassis dynamometer shall meet the requirements of the 06 series of amendments to Regulation No. 83.

       4.2. Hydrogen emission measurement enclosure

        The hydrogen emission measurement enclosure shall be a gas-tight measuring chamber able to contain the vehicle/REESS under test.  The vehicle/REESS shall be accessible from all sides and the enclosure when sealed shall be gas-tight in accordance with Appendix 1 to this annex.  The inner surface of the enclosure shall be impermeable and non‑reactive to hydrogen.  The temperature conditioning system shall be capable of controlling the internal enclosure air temperature to follow the prescribed temperature throughout the test, with an average tolerance of ±2 K over the duration of the test.

        To accommodate the volume changes due to enclosure hydrogen emissions, either a variable-volume or another test equipment may be used.  The variable-volume enclosure expands and contracts in response to the hydrogen emissions in the enclosure.  Two potential means of accommodating the internal volume changes are movable panels, or a bellows design, in which impermeable bags inside the enclosure expand and contract in response to internal pressure changes by exchanging air from outside the enclosure.  Any design for volume accommodation shall maintain the integrity of the enclosure as specified in Appendix 1 to this annex.

        Any method of volume accommodation shall limit the differential between the enclosure internal pressure and the barometric pressure to a maximum value of ±5hPa.

        The enclosure shall be capable of latching to a fixed volume.  A variable volume enclosure shall be capable of accommodating a