AS8506 Battery Stack Monitor/Balancer


Cell monitor and balancer IC from ams

The AS8506 cell monitor and balancer IC enables autonomous cell balancing, simultaneous cell- voltage comparison and simplified readout of cells all in a robust, simple and small solution. The AS8506 features simultaneous cell-voltage comparison with upper and lower threshold, active- or optionally-passive cell balancing by simultaneous comparison of actual cell voltages with a target cell voltage. Cells which are below target will either cyclically receive charge packages from an isolated DC/DC converter or, optionally, cells above target will cyclically be discharged by an external resistor through integrated switches in an autonomous way. The device can flexibly be used for battery stacks of 3 to 7 cells. Together with autonomous monitoring and balancing, this significantly reduces data communication compared to existing solutions and improves EMC robustness.

Features and Benefits
  • Simultaneous cell-voltage capture for balancing and SOA monitoring
  • Autonomous balancing and SOA monitoring strongly reduces data communication and processing and thereby improves EMC robustness
  • Active charge balancing with very few external components for good efficiency and little heat dissipation
  • Absolute cell voltage readout for OCV capture and cell impedance calculation. Readout of 2 temperature sensors
Applications
All li-based cell packs as well as EDLCs (electrical double-layer capacitors = supercapacitors) in the following applications: Mobility (like in 12 V, 48 V, high-voltage BMS applications: BEV, HEV, motorcycles, E-Scooters, E-Bicycles and E-Karts), consumer electronics like power tools (drill machines) and off/on-grid energy storage (for photo voltaic/wind energy).

AS8506's Cell monitor and balancer IC

Manufacturer Part Number Description Available Quantity Datasheets
AS8506-BQFM IC BATTERY MON/BALANCER 40-MLF 978
AS8506C-BQFM IC BATTERY MON/BALANCER 40-MLF 991