Document ID: chunk:federal_register_of_legislation:F2023L01526:body:0:p49
Version: federal_register_of_legislation:F2023L01526
Segment Type: other
Provision Reference: 
Character Range: 137598–140464

to normal charge procedure as specified in paragraph 5.1.4.7. below.

       5.1.4.5. The enclosure doors are closed and sealed gas-tight within two minutes from electrical interlock of the normal charge step.

       5.1.4.6. The start of a normal charge for hydrogen emission test period begins when the chamber is sealed. The hydrogen concentration, temperature and barometric pressure are measured to give the initial readings CH2i, Ti and Pi for the normal charge test.

       These figures are used in the hydrogen emission calculation (paragraph 6. of this annex). The ambient enclosure temperature T shall not be less than 291 K and no more than 295 K during the normal charge period.

       5.1.4.7. Procedure of normal charge

       The normal charge is carried out with the charger and consists of the following steps:

           (a) Charging at constant power during t1;

           (b) Over-charging at constant current during t2. Over-charging intensity is specified by manufacturer and corresponds to the one used during equalisation charging.

       The end of REESS charge criteria corresponds to an automatic stop given by the charger to a charging time of t1 + t2. This charging time will be limited to t1 + 5 h, even if a clear indication is given to the driver by the standard instrumentation that the battery is not yet fully charged.

       5.1.4.8. The hydrogen analyser shall be zeroed and spanned immediately before the end of the test.

       5.1.4.9. The end of the emission sampling period occurs t1 + t2 or t1 + 5 hours after the beginning of the initial sampling, as specified in Annex 8 paragraph 5.1.4.6. of this annex. The different times elapsed are recorded. The hydrogen concentration, temperature and barometric pressure are measured to give the final readings CH2f, Tf and Pf for the normal charge test, used for the calculation in Annex 8, paragraph 6.

       5.1.5. Hydrogen emission test with the charger failure

       5.1.5.1. Within seven days maximum after having completed the prior test, the procedure starts with the discharge of the REESS of the vehicle according to Annex 8, paragraph 5.1.2.

       5.1.5.2. The steps of the procedure in Annex 8, paragraph 5.1.3. of this annex shall be repeated.

       5.1.5.3. Before the completion of the soak period, the measuring chamber shall be purged for several minutes until a stable hydrogen background is obtained. The enclosure mixing fan(s) shall also be turned on at this time.

       5.1.5.4. The hydrogen analyser shall be zeroed and spanned immediately prior to the test.

       5.1.5.5. At the end of the soak, the test vehicle, with the engine shut off and the test vehicle windows and luggage compartment opened shall be moved into the measuring chamber.

       5.1.5.6. The vehicle shall be connected to the mains. The REESS is charged according