| Parameter | Specification |
|---|---|
| Sensor Type | Smart Battery Sensor (Shunt + MCU) |
| Measurement Principle | Shunt Sampling + Microcontroller Processing |
| Battery Type | 12V Lead-Acid |
| Current Range | Hundreds to Thousands of Amps (peak) |
| Accuracy | High precision, low TCR |
| Operating Temperature | -40°C to +125°C |
| Storage Temperature | -40°C to +130°C |
| Supply Voltage | Compatible with 12V automotive systems |
| Communication Interface | LIN 2.2 / 2.1 / 2.0 |
| Output Data | SOC, SOH, SOF, Current, Voltage, Temperature |
| Built-in Features | Integrated NTC, smart battery management chip |
| Material | Alloy with high long-term stability |
| Mounting Method | Screw-mounted, direct connection to battery terminal |
| Dimensions | Compact modular design, optimized for space-saving |
| Compliance | RoHS, REACH, ISO 7637-2, AEC-Q100 Grade 1 |
| Safety Rating | ASIL-B compliant |
The Smart Battery Sensor is an advanced current measurement and state estimation device designed specifically for 12V lead-acid batteries used in internal combustion engine (ICE) vehicles, electric vehicles (EVs), and hybrid electric vehicles (HEVs). It combines a high-precision shunt resistor with an integrated smart battery management chip to provide real-time monitoring of the battery’s State of Charge (SOC), State of Health (SOH), and State of Function (SOF). This enables accurate assessment of battery performance, remaining capacity, aging status, and overall reliability—critical information for optimizing vehicle start-stop systems, regenerative charging, and auxiliary power management.
Unlike traditional standalone shunt sensors, this smart sensor features a built-in microcontroller that processes raw current data using advanced algorithms, including Coulomb counting, temperature compensation, and impedance-based diagnostics. The sensor supports a wide current range—from hundreds to thousands of amperes (peak)—making it suitable for both standard automotive applications and high-power hybrid systems. Its compact, robust design allows direct installation on the battery terminal or main power busbar via screw mounting, ensuring minimal electrical resistance and reliable contact under vibration and thermal cycling conditions.
The sensor employs special alloy materials with ultra-low temperature coefficient of resistance (TCR) to maintain high accuracy across extreme operating temperatures (-40°C to +125°C). This ensures stable performance during cold starts, hot weather operation, and rapid charging cycles. The integrated NTC thermistor continuously monitors ambient temperature, enabling dynamic correction of current measurements and battery state predictions. With excellent electromagnetic compatibility (EMC) and low thermal electromotive force (EMF), it minimizes signal noise and interference, providing clean, reliable data even in harsh electrical environments.
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