TI Launches Industry's First Single-Chip Battery Management Device for Power Tool and E-Bike Applications

A highly integrated standalone device that provides complete pack protection and cell balancing capabilities for lithium battery packs of up to 4 to 10 cells.

TI Korea (CEO Jaejin Kim, www.ti.com/ww/kr ) July 19, 2011 – TI has launched the industry's first single-chip battery protection and cell-balancing solution for lithium-ion and lithium iron phosphate (LFP) battery packs. The bq77910 battery management and protection device can manage battery packs of 4 to 10 cells and protect packs of 11 to 20 cells by stacking two devices. This device simplifies battery pack designs for e-bikes, e-scooters, portable gardening tools, power tools, and UPS (Uninterruptible Power Supply), and can also be used to replace lead-acid batteries. (For sample and evaluation module orders, please refer to www.ti.com/bq77910-pr )

The bq77910 drives two N-channel power MOSFETs to protect the battery pack by monitoring each cell voltage and to cut off the current in the event of a fault. The fault detection and recovery criteria of this device can be fully programmed into non-volatile memory, making it optimized for all types of lithium battery systems.

Key Features and Advantages of bq77910
• Battery management and protection for 4–10 cell lithium batteries: Maximizes battery pack service life and performance by supporting individual cell monitoring and balancing via internal FETs.
• Low-power operation: Low drive current (50µA under normal conditions, 2.5µA in shutdown mode) optimizes battery life by minimizing battery discharge during storage or idle periods.
• Support for various types of lithium batteries: With programmable (EEPROM) fault detection thresholds and time delay characteristics, the bq77910 is applicable to all lithium systems, including LiCoO2, LiFePO4 (LFP), etc.
• Standalone integrated solution requiring no external controller or processor

Tools and Support
TI provides various tools and support to enable rapid implementation of bq77910 family devices.
• bq77910EVM-001 Evaluation Module: www.ti.com/bq77910evm-pr
• bq77908-10-GUI-SW Evaluation Software: www.ti.com/bq77910guisoftware-pr

Supply timing and price
The bq77910 is currently available in a 38-pin TSSOP package, and the price is $2.7 per 1,000-unit quantity.

More detailed information on TI's battery management portfolio
• Download TI's 2011 Power Management Selection Guide:http://www.ti.com/2011powerguide-pr" target=_blank>www.ti.com/2011powerguide-pr
• Download TI's New 2011 Hybrid and Electric Vehicle Solutions Guide:
www.ti.com/hevguide-pr
• bq77910 Solution Introduction Video: www.ti.com/bq77910video-pr
• Michael Weitz's Battery Management System Overview Video:
www.ti.com/batterymgmtvideo-pr
• Ask engineers and troubleshoot on the TI E2E™ Community Battery Forum: www.ti.com/batteryforum-pr