Electrical measurement technology specialist LEM has launched the new Single Monitoring Unit (SMU) family, bringing performance to EV technologies including Full Hybrid Electric Vehicles (FHEVs), Plug-in Hybrid Electric Vehicles (PHEVs), and Battery Electric Vehicles (BEVs). The modular SMU family addresses automotive battery management system (BMS) design needs, helping extend the driving range of an electric vehicle.
The SMU continuously monitors vehicle parameters such as battery performance and safety systems, detects anomalies, and supports diagnostics—improving vehicle efficiency and ensuring compliance with regulations. Designed with the smallest possible components to reduce EV weight and increase range, the compact SMU measures just 29.1mm (H) x 35.5mm (W) x 49.9mm (L) with a compatible busbar thickness of 2-3mm. The integrated busbar minimizes size while enhancing accuracy and accommodates various busbar dimensions.
Also read: KIMM makes developments in underwater laser cutting technology
Precision State of Charge (SOC) Estimation: Enhancing EV Performance with Sensor Technology
Maximising EV range hinges on precise State of Charge (SOC) estimation, which involves determining the remaining battery capacity accurately. This accurate SOC estimation extends battery life, prevents unexpected power loss, enhances user confidence, and optimizes energy management. As part of its advanced sensor technology, LEM’s SMU leverages Hall effect technology in an open-loop configuration, utilizing the latest LEM9 Application-Specific Integrated Circuit (ASIC).
This sensor technology adds intelligence at the Battery Disconnect Unit (BDU) level, enabling measurements of environmental factors while delivering accurate sensor performance. Enhanced by software algorithms that adjust for distortions or mechanical stress errors, the SMU achieves up to 1% accuracy at 1300A and <1.7% at 1500A. This range, up to +/-1500A, is ideal for BMS applications. High isolation levels allow the sensor to withstand voltage differences exceeding 800 V between components, improving safety and preventing electrical interference.
Danisense Current Transducers: Ideal for High-Power Current Sensing in E-Mobility
Danisense has introduced a line of current transducers with voltage output designed for efficient data acquisition (DAQ) systems. By integrating the burden resistor into the current transducer, these devices mitigate miscalculations, providing streamlined workflows for engineers. The DS, DM, and DL series from Danisense enable precise measurement of AC and DC currents from 55A to 3000A, ideal for challenging environments and sectors like e-mobility, solar, and wind energy.
The transducers offer features like high-temperature tolerance, a 1V or 10V BNC voltage output, a large aperture (up to 68mm), and low linearity errors. Constructed with aluminum housings for EMI shielding and utilizing Fluxgate technology with fixed excitation frequency and second harmonic zero flux detection, these transducers achieve exceptional accuracy and stability. For applications requiring high-power current sensing up to 11kA, the DR series offers a large aperture (up to 150mm), low linearity errors, and a 3-pin XLR mini connector for voltage output.
Yokogawa’s DLM3000HD: High-Definition Oscilloscope for EV and Inverter Development
Yokogawa Test & Measurement Corporation has released the DLM3000HD series high-definition oscilloscopes, accompanied by new IS8002CDV Classic Data Viewer (CDV) software. Compact and lightweight, the DLM3000HD addresses high-precision, high-speed measurement needs for complex digital waveforms, especially useful in motor and inverter testing. With frequency bandwidth models spanning 500 MHz and 350 MHz, this oscilloscope leverages low-noise detection and high resolution to capture and analyze fine waveform details.
Building on its DLM3000 mixed-signal oscilloscope series from 2018, Yokogawa applied over a century of expertise in measuring instruments to create the DLM3000HD. Its design responded to customer requests for a lightweight, high-precision oscilloscope with rapid startup for efficient EV and inverter testing. Its ability to capture precise voltage and current waveforms is crucial for electric motor efficiency in applications like transportation. Designed to support next-generation silicon-carbide (SiC) power devices, which operate within nanosecond transitions, the DLM3000HD’s multi-channel measurement capabilities provide wide bandwidth and improved vertical resolution for detailed signal analysis.
Advanced Sensor Technology: Meeting the Demands of Next-Gen Inverters
With a 1 Gpoint memory (double that of its predecessor, the DLM3000), the DLM3000HD supports developing and evaluating next-gen inverter devices by simultaneously recording multiple channels and increasing efficiency. It allows engineers to accurately monitor signal waveforms over extended periods, capturing even subtle signal changes at sample rates up to 2.5 GS/s, and detecting signal anomalies.
As sensor technology continues to evolve across sectors, innovations like those from LEM, Danisense, and Yokogawa reflect the expanding role of measurement in EV efficiency, renewable energy, and beyond, enhancing the accuracy and functionality of today’s most advanced applications.
