Introduction: The Backbone of Precision Measurement for “Three-Electric” Systems
The battery, electronic control, and motor – known as the “three-electric” systems – directly determine a new energy vehicle’s range, safety, and performance. From millivolt-level voltage monitoring of individual battery cells to complex waveform measurement in motor control, high-precision tools are indispensable. The 5Multimeter Digital ½ Digit, with its 0.015% DCV basic accuracy and 200,000-count resolution, emerges as a key device in R&D, production, and maintenance of these systems, precisely addressing industry measurement pain points.
Battery System: Safeguarding BMS with Micro-Level Accuracy
Firstly, the 5½-Digit Digital Multimeter acts as a “precision detector” for Battery Management System (BMS) debugging. Minor voltage differences between individual battery cells significantly impact the battery pack’s lifespan and safety. Ordinary multimeters, with an error margin of ±0.1%, often miss critical hazards. In contrast, the 5½-Digit Digital Multimeter, boasting microvolt-level resolution, can accurately capture voltage fluctuations within 1mV, ensuring the BMS balances each cell precisely. Moreover, its built-in four-wire Kelvin measurement method eliminates contact resistance interference, accurately identifying milliohm-level internal resistance changes in degraded cells. This reliable data supports battery sorting and health assessment, directly reducing the risk of battery pack fires.
Electronic Control System: Mastering Complex Waveforms
As the “brain” of the three-electric systems, the electronic control system demands even stricter measurement precision. The PWM pulse waveforms output by inverters are non-sinusoidal signals; ordinary multimeters can yield measurement errors exceeding 10%. Fortunately, the 5½-Digit Digital Multimeter, equipped with True RMS (True Root Mean Square) functionality, accurately captures the true effective value of variable-frequency signals, keeping errors below 0.1%. This empowers engineers to optimize motor control algorithms effectively. Additionally, in the calibration of 4-20mA sensor loops, its 0.015% current accuracy quickly locates signal drift issues. This ensures stable power supply for critical components like ADAS systems and vehicle radars, enhancing autonomous driving reliability.
Motor System: Boosting Efficiency and Fault Diagnosis
The efficient operation of the motor system also relies on the support of high-precision measurement from the 5½-Digit Digital Multimeter. The milliohm-level DC resistance of motor windings directly affects energy consumption; the multimeter’s low-resistance measurement mode quantifies this resistance accurately, providing a basis for motor selection and loss analysis. Furthermore, during dynamic motor testing, its wide measurement range (0-1000V DC/750V AC) and high-speed sampling capability real-time monitor dynamic changes in starting current and operating voltage. Combined with VFD filtering to suppress industrial noise, it helps engineers identify hidden faults such as bearing wear and winding short circuits, reducing after-sales maintenance costs.
Conclusion: An Indispensable Tool for the Industry
Ultimately, the 5½-Digit Digital Multimeter, with its “high precision + cost-effectiveness” characteristics, has become a standard tool in the new energy vehicle industry. It not only solves core challenges like micro-signal measurement and complex waveform capture in three-electric systems but also supports product iteration through accurate data. In turn, this drives new energy vehicles toward greater safety and efficiency, making it an irreplaceable measurement partner for industry practitioners.
Jetronl Instruments Co., LTD. has specialized in the electronic measurement field for 35 years, covering various measurement needs across the entire electronic industry chain and providing precise measurement support.
