Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:9:p9
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 9 (pt 9/37)
Character Range: 1801397–1804618

in paragraphs 4.1.1.3., 4.1.1.4. and 4.1.1.5. of this annex shall be replaced by ΔMCO2,j instead of .

Annex B8 - Appendix 3

Determination of REESS current and REESS voltage for NOVC-HEVs, OVC-HEVs, OVC-FCHVs, PEVs and NOVC-FCHVs (as applicable)
              1. Introduction
              1.1. This appendix defines the method and required instrumentation to determine the REESS current and the REESS voltage of NOVC-HEVs, OVC-HEVs, OVC-FCHVs, PEVs and NOVC-FCHVs.
              1.2. Measurement of REESS current and REESS voltage shall start at the same time as the test starts and shall end immediately after the vehicle has finished the test.
              1.3. The REESS current and the REESS voltage of each phase shall be determined.
              1.4. A list of the instrumentation used by the manufacturer to measure REESS voltage and current (including instrument manufacturer, model number, serial number, last calibration dates (where applicable)) during:
              (a) The Type 1 test according to paragraph 3 of this annex;
                  (b) The procedure to determine the correction coefficients according to Appendix 2 of this annex (where applicable);
                  (c) For Level 1A;
                  The Ambient Temperature Correction Test (ATCT) as specified in Annex B6a
              shall be provided to the responsible authority.
              2. REESS current
              REESS depletion is considered as a negative current.
              2.1. External REESS current measurement
              2.1.1. The REESS current(s) shall be measured during the tests using a clamp-on or closed type current transducer. The current measurement system shall fulfil the requirements specified in Table A8/1 of this annex. The current transducer(s) shall be capable of handling the peak currents at engine starts and temperature conditions at the point of measurement.
              In order to have an accurate measurement, zero adjustment and degaussing shall be performed before the test according to the instrument manufacturer's instructions.
              2.1.2. Current transducers shall be fitted to any of the REESS on one of the cables connected directly to the REESS and shall include the total REESS current.
              In case of shielded wires, appropriate methods shall be applied in accordance with the responsible authority.
              In order to easily measure the REESS current using external measuring equipment, the manufacturer should provide appropriate, safe and accessible connection points in the vehicle. If that is not feasible, the manufacturer is obliged to support the responsible authority in connecting a current transducer to one of the cables directly connected to the REESS in the manner described above in this paragraph.
              2.1.3. The current transducer output shall be sampled with a minimum frequency of 20 Hz. The measured current shall be integrated over time, yielding the measured value of Q, expressed in ampere-hours Ah. The integration may be done in the current measurement system.
              2.2. Vehicle on-board REESS current data

              As an alternative to paragraph 2.1. of this appendix, the manufacturer may use