Texas Instruments Corporation

John Michael Ross

Ken Richard King

Jun J Hua

Mustapha Elmarkhi

A circuit providing voltage cell balancing is provided. The circuit includes a cell balancing network comprising separate switching circuits, each being configured to balance a respective cell voltage for a respective cell of a plurality of voltage cells based on a respective switching control signal. A control circuit includes a plurality of current sources, each of the plurality of current sources selectively connected to a respective one of the separate switching circuits to independently control operation of each of the separate switching circuits of the cell balancing network to balance the voltage across the plurality of voltage cells.

System and method for balancing voltages

Systems and methods are disclosed which relate to improving synchronization of clocks between a sender and a receiver communicating via an asynchronous serial interface. In a ring topology, a master device is connected to a plurality of slaves communicating using a bi-frequency encoded bit stream. A host device communicates with the master device using a non-return-to-zero data encoding. Each slave receives data from the master and sends it to the next slave in the ring unaltered unless the master indicates a requirement for a particular data, and transmits placeholder bits with a value of 0 around the ring. A particular slave can 'fill-in' the placeholder bits with the information to be sent back to the master by inverting the placeholder bit. Clock synchronization between a receiving device and a transmitting device is improved using a fractional rate multiplier to generate a data sampling clock from a system clock. By adjusting the denominator, the sampling clock can be tuned to match the baud rate of the asynchronous serial data stream received from the transmitting device. Embodiments described include power management, data acquisition (DAQ), etc.

Method and system for asynchronous serial communication in a ring network by generating an oversampling clock using a fractional rate multiplier and sampling a received data bit sequence that includes voltage and temperature information in a battery management system

Growing community of inventors

Olney, MD, United States of America

John Michael Ross