Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p56
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 155316–158354

be performed with a modified tested-device as agreed by the manufacturer and the Technical Service. These modifications shall not influence the test results.

       3. Procedures

       3.1. General test conditions

       The following requirements and condition 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) At the beginning of the test, all protection devices which would affect the function of the tested-device and which are relevant for the outcome of the test shall be operational.

       3.2.  Discharging

       At the beginning of the test, all relevant main contactors shall be closed.

       A discharge shall be performed with at least 1/3 C rate but shall not exceed the maximum current within the normal operating range as specified by the manufacturer.

       The discharging shall be continued until the tested-device (automatically) interrupts or limits the discharging. Where an automatic interrupt function fails to operate, or if there is no such function then the discharging shall be continued until the tested-device is discharged to 25 per cent of its nominal voltage level.

       3.3.  Standard charge and observation period

       Directly after termination of the discharging the tested-device shall be charged with a standard charge as specified in Annex 8, Appendix 1 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 8I

Over-temperature protection

       1. Purpose

       The purpose of this test is to verify the performance of the protection measures of the REESS against internal overheating during the operation, even under the failure of the cooling function if applicable. In the case that no specific protection measures are necessary to prevent the REESS from reaching an unsafe state due to internal over-temperature, this safe operation must be demonstrated.

       2. Installations

       2.1. The following test may be conducted with the complete REESS (maybe as a complete vehicle) or with related REESS subsystem(s), 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. The test may be performed with a modified tested-device as agreed by the manufacturer and the Technical Service. These modifications shall not influence the test results.

       2.2. Where a REESS is fitted with a cooling function and where the REESS will remain functional without a cooling function system being operational, the cooling system shall be deactivated for the test.

       2.3. The temperature of the tested-device shall be continuously measured inside the casing in the proximity of