Temperature test solution for IGBT power devices in new energy vehicles

IGBT is a power semiconductor device. In the field of new energy vehicles, IGBT is the core device of electronic control systems and DC charging piles, which directly affects the power release speed, vehicle acceleration ability and high speed of electric vehicles.

The role of IGBT power devices

The main function of IGBT power modules in new energy vehicle applications is the conversion of AC and DC. At the same time, IGBT also undertakes the function of high and low voltage conversion. For example, when charging a charging pile, it is AC, which needs to be converted into DC through IGBT. In the field of automotive electronics, IGBT is mainly used for motor drive, DC/DC boost converter, bidirectional DC/AC inverter, and DC/DC buck converter at the charging end.

IGBT power device temperature test standard

The requirements for product performance and quality of automotive IGBT modules are significantly higher than those in the consumer and industrial control fields. They need to pass strict automotive certification. The automotive IGBT module test standards mainly refer to AEC-Q101 and AQG-324, among which temperature shock, power cycle, temperature cycle, junction temperature, etc. are important test requirements. Power cycling and temperature cycling are representative endurance tests, and the number of test cycles may range from tens of thousands to hundreds of thousands.

IGBT power device temperature test solution

A R&D and manufacturing manufacturer focusing on power control modules for new energy vehicles requires rapid temperature cycle shock and power cycle tests on IGBTs at temperatures between -40°C and 175°C. Shanghai Bodong USA inTEST high and low temperature shock heat flow meter with test machine platform load board provides solutions for IGBT power device temperature testing.

Model: ATS-710E
Temperature range °C: -75 to +225 50Hz
Output gas flow: 4 to 18 scfm
Temperature change rate: -55 to +125°C about 10 s
+125 to -55°C about 10 s
Temperature accuracy: ±1°C Temperature
Display resolution: ±0.1°C
Remote control: IEEE 488, RS232

Test in DUT Mode with inTEST ATS-710E1

. Connect the high and low temperature tester ATS-710E to the power module test fixture2
. The operator sets the temperature range to be tested from -40℃ to 175℃
3. Start ATS-710E, use the air compressor to pass dry and clean air into the refrigerator for low temperature treatment, and then the air reaches the heating head through the external pipeline for heating.
4. The ATS-710E display can monitor the current circulating impact air flow temperature in real time, and it has a built-in overheating temperature protection system. The factory setting temperature is +225°C. The operator can set the high and low temperature limit points according to actual needs. When the temperature reaches the set temperature, the tester will automatically stop.

Compared with traditional high and low temperature test chambers, the main advantages of inTEST heat flow meter are:

1. Faster temperature change rate: can quickly heat up or cool down 18°C ​​per second
2. Temperature control accuracy: ±1℃
3. Real-time monitoring of the actual temperature of the component to be tested, and the impact airflow temperature can be adjusted at any time
4. For a single IC (module) among the many components on the PCB circuit board, high and low temperature impact can be performed separately without affecting other surrounding devices
5. Temperature cycle/impact on the IC on the test machine platform load board; traditional high and low temperature chambers cannot be used for this type of test
6. Provide accurate and fast ambient temperature for the entire integrated circuit board