Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p47
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 130546–133450

to the tested-device.

       3. Procedures

       3.1. General test conditions

       The following conditions shall apply to the tested-device:

       (a) The test shall be conducted at an ambient temperature of 20 ± 10 °C;

           (b) At the beginning of the test, the SOC shall be adjusted to a value in the upper 50 per cent of the normal operating SOC range of the tested-device;

           (c) At the beginning of the test, all protection devices which affect the function(s) of the tested-device that are relevant to the outcome of the test shall be operational.

       3.2. Test procedures

       The tested-devices shall be subjected to a vibration having a sinusoidal waveform with a logarithmic sweep between 7 Hz and 50 Hz and back to 7 Hz traversed in 15 minutes. This cycle shall be repeated 12 times for a total of 3 hours in the vertical direction of the mounting orientation of the REESS as specified by the manufacturer.

       The correlation between frequency and acceleration shall be as shown in Table 1:

       Table 1

       Frequency and acceleration

Frequency (Hz)  Acceleration (m/s2)
7 - 18          10

18 - 30         gradually reduced from 10 to 2

30 - 50         2

       At the request of the manufacturer, a higher acceleration level as well as a higher maximum frequency may be used.

       At the request of the manufacturer a vibration test profile determined by the vehicle-manufacturer, verified for the vehicle application and agreed with the Technical Service may be used as a substitute for the frequency - acceleration correlation of Table 1. The approval of a REESS tested according to this condition shall be limited to approvals for a specific vehicle type.

       After the vibration, a standard cycle as described in Annex 8, 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 8B

Thermal shock and cycling test

       1. Purpose

        The purpose of this test is to verify the resistance of the REESS to sudden changes in temperature. The REESS shall undergo a specified number of temperature cycles, which start at ambient temperature followed by high and low temperature cycling. It simulates a rapid environmental temperature change which a REESS would likely experience during its life.

       2. Installations

       This test shall be conducted either with the complete REESS or with related REESS subsystem(s) of the REESS including the cells and their electrical connections. If the manufacturer chooses to test with related subsystem(s), the manufacturer shall demonstrate that the test result can reasonably represent the performance of the complete REESS with respect to its safety performance under the same conditions. If the electronic management unit for the