"In recent years, the energy storage industry has been thriving, primarily because industrial energy storage systems can provide essential energy support during periods of unstable energy supply or high costs, ensuring continuity and stability in production. Industrial energy storage systems balance supply and demand, store excess energy for future use, reduce waste, and optimize costs. Additionally, with the increasing reliance on renewable energy, industrial energy storage has become a critical tool for smoothing out fluctuations in renewable energy output, helping to increase its share in the overall energy mix. At the same time, industrial battery management is a core component in maximizing battery performance and extending its lifespan. An effective battery management system can monitor battery status, prevent overcharging and over-discharging, maintain battery health, and ensure safe operation. In high-demand industrial applications, the complexity of battery management significantly increases, requiring advanced technologies and strategies to meet both reliability and performance requirements. As a global leader in intelligent sensors and emitters, ams OSRAM has introduced the new AS8512 IVT sensor, further expanding its current sensor product portfolio." (Note 1)
This product provides a high-precision component for battery management systems, applicable to solar systems, wind farms, grid energy storage systems, building energy storage systems, electric vehicles, and battery-powered devices.
Below is the system block diagram of the battery management system. The AS8512 IVT sensor is a new industrial-grade data acquisition front-end integrated circuit (AFE), represented by the orange box in the diagram below. It performs synchronized measurements of voltage, current, and temperature.
Product Block Diagram:
In battery management systems, the AS8512 IVT sensor achieves virtually drift-free, low-noise dual-channel differential current and voltage measurements. Combined with a shunt resistor connected in series on the battery rail, the sensor can accurately measure any current value ranging from milliamps to kiloamps. The second measurement channel can be used for synchronized measurement of battery voltage and current or for measuring the analog output of internal or external temperature sensors. Measurement results are transmitted via the SPI interface.
Specifications of AS8512:
- Low supply voltage, redundancy measurement capability, flexible configuration
- Two high-precision ADCs. Programmable sampling allows data throughput from less than 1Hz to 8kHz
Advantages of AS8512:
- Cost-effective – High precision across the entire temperature and measurement range
- Unique measurement principle – Special measurement principle (chop/dechop) allows offset-free measurements
- Ultra-wide measurement range – Current measurement range from 1mA to 1500A
- Easy integration – Can be linked to external MCUs via SPI, with a simple SPI protocol
- Low linear error – Provides linear error within ±0.25% across the entire measurement range
Key Features of AS8512:
- Thanks to the chop and dechop measurement principle, offset-free measurements are possible
- Excellent linear performance with minimal linear error
- Linear behavior and low measurement error across a wide temperature range
- Low power consumption and wide measurement range
High-precision data acquisition, low-noise measurement with zero offset, and synchronized measurement of current, voltage, and temperature make the AS8512 an economical and efficient sensor for long-term monitoring of industrial battery energy storage systems (BESS). This sensor can accurately measure current and voltage, enabling precise calculation of battery test capacity. If you are interested, you can apply for a demo board for testing. The test board is shown below:
Reference Materials