Document ID: chunk:federal_register_of_legislation:F2023L01526:body:0:p48
Version: federal_register_of_legislation:F2023L01526
Segment Type: other
Provision Reference: 
Character Range: 134997–137875

steady speed of 70 per cent ± 5 per cent of the maximum speed of the vehicle during 30 minutes.

       Discharging is stopped:

           (a) When the vehicle is not able to run at 65 per cent of the maximum thirty minutes speed, or

           (b) When an indication to stop the vehicle is given to the driver by the standard on-board instrumentation, or

    (c) After having covered the distance of 100 km.

       5.1.1.2. Initial charge of the REESS

       The charge is carried out:

           (a) With the charger;

           (b) In an ambient temperature between 293 K and 303 K.

           The procedure excludes all types of external chargers.

           The end of REESS charge criteria corresponds to an automatic stop given by the charger.

           This procedure includes all types of special charges that could be automatically or manually initiated like, for instance, the equalisation charges or the servicing charges.

       5.1.1.3. Procedure from paragraphs 5.1.1.1. and 5.1.1.2. shall be repeated two times.

       5.1.2. Discharge of the REESS

       The REESS is discharged while driving on the test track or on a chassis dynamometer at a steady speed of 70 per cent ± 5 per cent from the maximum thirty minutes speed of the vehicle.

       Stopping the discharge occurs:

           (a) When an indication to stop the vehicle is given to the driver by the standard on-board instrumentation, or

           (b) When the maximum speed of the vehicle is lower than 20 km/h.

       5.1.3. Soak

       Within fifteen minutes of completing the battery discharge operation specified in paragraph 5.1.2., the vehicle is parked in the soak area. The vehicle is parked for a minimum of 12 hours and a maximum of 36 hours, between the end of the traction battery discharge and the start of the hydrogen emission test during a normal charge. For this period, the vehicle shall be soaked at 293 K ± 2 K.

       5.1.4. Hydrogen emission test during a normal charge

       5.1.4.1. 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.

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

       5.1.4.3. 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.

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