Application Areas

⚡ Precision Shunt Resistors · Application Areas

Current Detection Precision Resistance BMS Current Sampling — The Core Reference · High Linearity · Low Drift

The basic principle of precision shunt resistors is based on Ohm's Law (I = V/R).

Precision shunts convert large currents into small voltages for accurate measurement. Compared with Hall-effect sensors, they offer extremely high linearity, low temperature coefficient (<10 ppm/℃), and high cost-effectiveness — making them the "golden reference" for current measurement.

🔬 Metrology & Calibration · Laboratory Measurement — Highest Tier

Current value transfer — Used as physical standards to calibrate high-precision current sources and digital multimeters
Current sensor calibration — Used to calibrate Hall-effect sensors, current clamps, etc.
AC/DC transfer measurement — A critical method in metrology for evaluating the accuracy of AC ammeters
Class 0.01% accuracy · DC accuracy 20 ppm · Frequency up to 100 kHz

🚗 New Energy & BMS Current Sampling

Battery State of Charge (SoC) — Based on high-dynamic current integration for accurate remaining capacity estimation
State of Health (SoH) — Long-term current monitoring to support battery aging analysis
Wide dynamic range — From standby <1 A to drive >1000 A, spanning multiple decades
Automotive-grade alloy material (Manganin) · Resistance as low as 25 µΩ · Withstands 1400 A+

⚙️ Power Electronics · Industrial Control

Power supply / load calibration — Verifies current output stability of power supplies and electronic loads
System-level current sampling — Output current monitoring for variable-frequency drives and inverters
Overcurrent / current limiting protection — Converts high-current signals into reliable low-voltage feedback
Low power consumption · High bandwidth · Suitable for 1000 V high-voltage DC applications

📟 Instrumentation · Precision Resistors

High-precision digital multimeters — Internal current ranges rely on precision shunts as reference elements
Calibration sources & standards — Used as "precision resistors" to construct current standards
Scientific research — Precision monitoring of high currents in particle accelerators, superconducting magnets, etc.
Temperature coefficient as low as <5 ppm/℃ · Excellent long-term stability
When used as a "precision resistor," the shunt itself also serves as a highly stable resistance standard

🔋 DC Fast Charging · Energy Storage Systems — High-Current Metering

Ultra-fast charging piles 240 kW+ DC metering
Built-in shunt, Class 0.2 electricity meter
800 A / 1000 V high-voltage high-current
Eliminates external wiring errors · Optimized thermal drift performance
Shunt directly integrated into the electricity meter for improved long-term stability and metering reliability

✅ Precision Shunt Resistors — From metrology benchmarks to cutting-edge new energy applications, defining the cornerstone of current measurement.