Battery Management: High Cell Count for HEV

Block diagram (SBD) for High Cell Count Battery pack for HEV using TI’s Digital Power Controllers and High cell count Battery parts.

Block Diagram

Click on the colored blocks to view or sample recommended solutions


Power Line Communication Modem

Design Considerations

Plug-in Hybrid Electric Vehicles (PHEV) and Battery Electric Vehicles (BEV) are two quickly emerging technologies which use powerful electric motors as the propulsion source. In order to power these electric motors, large battery packs made up of hundreds of cells totaling 300-400 volts are installed in the vehicle. Since batteries have a finite energy capacity, PHEV and BEV must be recharged on a periodic basis, typically by connecting to the power grid.

The charging system for these vehicles consists of a an AC/DC rectifier to generate a DC voltage from the AC line followed by a DC/DC converter to generate the DC voltage required by the battery pack. Additionally, advanced charging systems might also communicate with the power grid using PLC modems to adjust charging based on power grid conditions. The battery pack must also be carefully monitored during operation and the charging process in order to maximize energy usage and prolong battery life.

High-performance analog parts are also available to provide critical system functions and features such as sensor feedback, isolation, chip power supplies, and communication transceivers.

The bq7xPLxxx device families are designed for high cell count battery packs. They can handle the voltages and currents found in higher power applications like power tools and electronic mobility. The more cells a pack has in series, the greater the difference in state of charge, impedance and capacitance affect the health and energy deliver of the pack. The bq7xPLxxx devices include circuitry for bringing the cells back into balance. This increases lifetime of the pack and can help deliver as much energy to the application as possible. Each bq7xPLxxx device protects from over charge, over discharge, over temperature and high current events for pack and system safety.

    

Tools and Software

Name Part # Company Software/Tool Type
C28x IQMath Library - A Virtual Floating Point Engine SPRC087 Texas Instruments Application Software & Frameworks

News Releases & Authored Articles

Visit the News Center

Similar End-Equipment Solutions

TI End-Equipment

All TI End-Equipment Solutions

Support and Community

Wikis

Visit the TI Wiki

Training & Events

Name Type Available During
Battery charging, gauging and protection
Learn how TI can provide solutions for different battery technologies. 
On-Line Training   On Demand  
Implementing Digital Motor Control with High Performance, Low Cost MCUs
Advanced digital motor control was only an option for high end motor drives and expensive equipment up until now.
On-Line Training   On Demand  

See More Training & Events

Other Support