ISO 21782-4:2021 pdf download.Electrically propelled road vehicles — Test specification for electric propulsion components — Part 4: Performance testing of the DC/DC converter.
This document specifies performance tests and each evaluation for the DC/DC converter in the voltage class B electric propulsion system of electrically propelled road vehicles.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 21782-1:2019, Electrically propelled road vehicles — Test specification for electric propulsion components — Part 1: General test conditions and definitions
ISO 21498-1, Electrically propelled road vehicles — Specification of voltage sub-classes for voltage class B 3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21782-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviated terms given in ISO 21782-1 apply.
5 Tests
5.1 Measurement of loss and efficiency
5.1.1 General
The purpose of this test is to operate the DC/DC converter under the specified conditions and to measure the loss and the efficiency of the DC/DC converter in order to ensure the performance is as designed.
5.1.2 Test diagram
The test diagram is shown in Figure 1.
5.1.3 Test conditions
Test conditions are shown in Table 1.
5.2 Temperature rise test
5.2.1 General
This test is to operate the DC/DC converter under the specified conditions and to measure the temperature rise in the DC/DC converter in order to ensure the thermal performance is as designed.
5.2.2 Test diagram
The test diagram is shown in Figure 2.
5.2.3 Test conditions
The test conditions are shown in Table 2.
5.2.4 Test procedure
a) The DC/DC converter shall be operated by the I t=t0 , and the temperature of each part of the DC/DC converter shall be recorded after specified time (t o ) passes.
b) The temperature shall be measured by the thermometer method. The temperature measurement points are shown below:
— electrode part of power semiconductor or specified point of the cooling components closely connected to these parts;
— inlet and outlet of coolant (in case of liquid cooling);
— inlet and outlet of air (in case of air cooling).
Some points may be added by the agreement between the supplier and customer.
6 Test report
Each test shall be reported with a test report, containing information on test conditions and results.
Examples for test reports on conditions and results are given in Tables A.1 and A.2.ISO 21782-4 pdf download.
