Efficient electric vehicle (EV) development depends on validation cycles that are faster, more repeatable, and more controlled than traditional manual testing can provide. Today’s EV modules operate as tightly integrated electronic and software systems, and their interactions must be verified across electrical, thermal, and communication conditions that are increasingly complex.
“Manual testing cannot keep up with the complexity and repetition required in EV validation. Automation has become indispensable,” shares Boopathi Raja, senior project engineer with Unilogic Technologies, which offers 14+ years of NI-certified experience in LabVIEW consulting, ATE, HIL systems, and machine vision.
EV components such as the battery management system, inverter boards, onboard chargers, dc-dc converters, dashboards, and gateway controllers must be tested for long-term reliability, fault behavior, interoperability, and safety. Automated test environments allow these evaluations to run with consistent timing, precise control, and full traceability.
Meeting these requirements calls for a test framework that can manage high-voltage conditions, enforce safety rules, and execute complex sequences with predictable timing. Automated software control is one practical way to achieve that level of repeatability and timing discipline.
One approach designed for automated, high-powered testing: LabVIEW-powered automation (Figure 1).
A LabVIEW-powered test bench can run 24-hour cycles, monitor safety thresholds, and capture synchronized electrical and thermal data in real time.
Why automation?
As EV systems merge high-voltage power electronics with increasingly software-driven control logic, validation must shift from manual workflows to automated, time-controlled execution.
“Deterministic test execution is critical for high-voltage EV modules where repeatability defines both safety and compliance,” notes Raja.
LabVIEW is a software platform for instrument control and automated testing that provides deterministic hardware control, synchronized measurement, safety enforcement, and long-duration execution without operator fatigue.
According to Raja, automation improves precision by delivering deterministic control of voltage, current, temperature, and load profiles.
Complex sequences, such as BMS balancing and inverter switching validation, become fully repeatable at microsecond-level timing. Automated benches also increase efficiency through 24-hour cycling, parallel DUT channels, and long-duration reliability tests without operator intervention.
Safety improves through layered interlocks, watchdog timers, relay monitoring, and supervised shutdown paths. Data integrity is strengthened through synchronized acquisition of analog, digital, thermal, and CAN signals. A LabVIEW-driven bench can run a 48-hour BMS cycling test while capturing waveforms, thermal drift, and CAN traffic in real time.
Automation delivers value to EV module testing by enhancing:
• Precision through deterministic control of electrical and thermal conditions
• Efficiency through continuous, multi-channel execution
• Safety through monitored thresholds and controlled shutdowns
• Data integrity through high-speed, time-aligned logging
Why hardware?
A reliable EV test bench requires modular hardware capable of reproducing real operating conditions. Programmable dc power supplies or SMUs deliver controlled voltage and current. Electronic loads emulate battery discharge or drivetrain demand.
PXI or CompactDAQ systems capture synchronized analog, digital, and thermal measurements. NI-XNET manages CAN, CAN FD, and LIN traffic between the test system and EV modules, while NI-VISA coordinates instrument control for power supplies, loads, and measurement devices. Safety features include watchdogs, interlocks, door sensors, and emergency stops.
“Whether you’re validating a BMS, inverter board, or dc-dc converter, LabVIEW’s modular software stack enables adaptive test strategies without redesigning the entire system,” says Raja.
LabVIEW serves as the orchestration layer. The test controller handles initialization and shutdown. A sequencer engine executes deterministic test steps using frameworks, such as QSM, Actor Framework, or DQMH.
A driver layer coordinates NI-VISA, NI-DAQmx, and NI-XNET communication. A safety supervisor evaluates voltage, current, temperature, and relay states to prevent hazardous conditions. Reporting tools generate PDF, Excel, or database outputs for engineering review or compliance records.
Together, these modules provide consistency, traceability, and repeatability across every test cycle.
This architecture supports functional verification, long-duration reliability cycling, thermal stress testing, inverter switching characterization, and environmental chamber workflows. It scales easily, reproduces identical test conditions, centralizes data for auditing, and maintains a controlled safety boundary around high-voltage hardware.
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