Li-ion battery monitoring system
31 March 2010
Power Electronics / Power Management
Lithium-ion (Li-ion) batteries are growing in popularity as energy storage reservoirs for high-voltage energy, industrial and automotive applications, such as wind turbines, photovoltaic cells and hybrid electric vehicles, and this has spurred demand for safer, higher performing battery monitoring and protection systems. Analog Devices (AD) has addressed the requirements of Li-ion battery manufacturers and power system designers with the unveiling of a Li-ion battery monitoring and protection system that integrates all necessary components, including voltage and current measurement, signal isolation and safety monitoring.
Compared to NiMH (nickel-metal hydride) batteries, Li-ion batteries have a better energy-to-weight ratio, offer more efficient storage capacity over multiple charge-discharge cycles, and suffer less charge leakage when not in use. And unlike NiMH batteries traditionally used in high-voltage applications, battery stacks using Li-ion technology can comprise a large number of individual cells totalling hundreds of volts. Each cell must be properly monitored and balanced to ensure user safety, improve battery performance and extend battery life.
In addition to its voltage measurement, current measurement, isolator, safety monitor and battery management unit offering, AD’s new AD8280 safety monitor provides the designer with the final piece needed to develop the complete front-end of a battery monitoring and protection system. The device is an integrated solution that monitors six cell voltages and two temperature inputs. It is powered completely from the battery stack, providing either a shared or a separate alarm for any of three conditions – over-voltage, over-temperature or under-voltage.
The AD8280 features extensive self-test upon prompt, enhancing the designer’s ability to meet functional safety requirements such as ISO26262 and IEC61508. A large, continuous range of trip point settings provides the flexibility to work with any Li-ion battery chemistry. The device enables flexible safety monitor configurations and its daisy-chain communications option minimises the need for isolators in a high-voltage cell stack. Its low-power mode enables the user to minimise battery drain when the battery is not in use. The part is compliant with AEC-Q100 and EMI (electromagnetic interference) standards, making it suitable for automotive applications.
Further reading:
NVDC power-path control to 1– 6 cell battery systems
iCorp Technologies
Power Electronics / Power Management
SG Micro’s SGM41581 is an I2C-controlled narrow voltage direct charging buck boost charge controller designed to simplify robust power delivery in systems that must seamlessly operate from an adapter input or a battery pack.
Read more...
Precise, adaptive battery health-monitoring
RS South Africa
Power Electronics / Power Management
New fuel gauge solution from Nordic delivers State-of-Health reporting, adaptive battery modelling, and seamless fleet observability via nRF Cloud.
Read more...
Compact 6 A automotive buck converter
Altron Arrow
Power Electronics / Power Management
Delivering up to 6 A of continuous output current, the DCP0606Y from STMicroelectronics enables efficient regulation of low-voltage rails commonly used in modern vehicle electronics and industrial systems.
Read more...
The new role of UPS technology in high-precision automation
Omron Electronics
Power Electronics / Power Management
OMRON’s BU_2SW and BU_2RWL series UPS systems are engineered to offer a robust, online type power architecture designed to safeguard sensitive AC powered systems across a wide range of industries.
Read more...
Rugged railway-grade DC-DC power modules
iCorp Technologies
Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.
Read more...
Four-quadrant regenerative grid simulator
Conical Technologies
Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.
Read more...
90 W PSU with 150% boost capability
Brabek
Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.
Read more...
Standalone USB PD controller
Future Electronics
Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.
Read more...
Power module enhances AI data centre power density
Altron Arrow
Power Electronics / Power Management
Microchip’s MCPF1525 power module with PMBus delivers 25 A DC-DC power and is stackable up to 200 A.
Read more...
MIL-Spec DC-DC power converters
Vepac Electronics
Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.
Read more...
printer friendly version