For EV component testing and all testing battery-connected devices like electric vehicles, onboard chargers, DC-DC converters, and motor drivers, a high-power battery simulation is a great solution to confirm if the device under test is performing as intended. For example, most DC fast charging devices on the market have a power range of up to 50kW-350kW. Because of that high output voltage and power, it's easier, faster, and safer to replace the actual battery pack with a scalable battery simulator like Chroma's regenerative 17040 battery test system. This allows emulation of the device under test's electrical boundaries in a safe, repetitive and predictable routine.
Integrated with any of Chroma's regenerative battery testers or bidirectional DC power supplies, their software simulates the battery state removing the wait time for the charge/discharge of an actual battery. Real-time test results include voltage, current, power, SOC%, charge/discharge state, and capacity. In addition, when a professional needs to perform battery charge/discharge testing, the 17040 allows the user to switch from battery simulation to battery cycling directly.
So when testing battery-connected EV devices, Chroma suggests ditching the battery. The company says it's better to set up a Chroma 17040 with their battery simulation software, and they provide some reasons why:
No battery swaps. Values for internal resistance, energy capacity, and output voltage can be changed in real-time
Allows safe, repetitive and predictable emulation of the device under test's electrical boundaries
Safety features such as real-time monitoring and automatic protection
The regenerative function enables energy reuse, reducing the cost of treating wasted heat
Direct switching between battery charger/discharger and battery simulator functions
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