Document ID: chunk:federal_register_of_legislation:F2023L01526:body:0:p67
Version: federal_register_of_legislation:F2023L01526
Segment Type: other
Provision Reference: 
Character Range: 185767–188684

the start of the test all relevant main contactors for charging and discharging shall be closed to represent the active driving possible mode as well as the mode to enable external charging. If this cannot be completed in a single test, then two or more tests shall be conducted.

       For testing with a complete REESS or REESS subsystem(s), the positive and negative terminals of the Tested-Device shall be connected to each other to produce a short circuit. The connection used for this purpose shall have a resistance not exceeding 5 mΩ.

       For testing with a complete vehicle, the short circuit is applied through the breakout harness. The connection used for creating the short circuit (including the cabling) shall have a resistance not exceeding 5 mΩ.

       The short circuit condition shall be continued until the protection function operation of the REESS terminate the short circuit current is confirmed, or for at least one hour after the temperature measured on the casing of the Tested-Device has stabilised, such that the temperature gradient varies by a less than 4 °C through 2 hour.

       3.3. Standard cycle and observation period

       Directly after the termination of the short circuit a standard cycle as described in Annex 9, Appendix 1 shall be conducted, if not inhibited by the Tested-Device.

       The test shall end with an observation period of 1 h at the ambient temperature conditions of the test environment.

Annex 9G

Overcharge protection

       1. Purpose

       The purpose of this test is to verify the performance of the overcharge protection to prevent the REESS from any further related severe events caused by a too high SOC.

       2. Installations

       This test shall be conducted, under standard operating conditions, either with a complete vehicle or with the complete REESS Ancillary systems that do not influence the test results may be omitted from the Tested-Device.

       The test may be performed with a modified Tested-Device these modifications shall not influence the test results.

       3. Procedures

       3.1. General test conditions

       The following requirements and conditions shall apply to the test:

           (a) The test shall be conducted at an ambient temperature of 20 ± 10 °C or at higher temperature if requested by the manufacturer;

           (b) The SOC of REESS shall be adjusted around the middle of normal operating range by normal operation recommended by the manufacturer such as driving the vehicle or using an external charger. The accurate adjustment is not required as long as the normal operation of the REESS is enabled;

           (c) For vehicle-based test of vehicles with on-board energy conversion systems (e.g. internal combustion engine, fuel cell, etc.), fill the fuel to allow the operation of such energy conversion systems;

           (d) At the beginning of the test, all protection