Power Electronics / Power Management


Smart battery management suite

26 November 2008 Power Electronics / Power Management

Texas Instruments has introduced three new smart battery management ICs that improve measurement and protection of multicell, lithium-based battery packs. They aim to simplify design in multicell lithium-based rechargeable batteries used in uninterruptible power supplies and applications, such as cordless power tools, power-assisted bicycles, and portable medical and test equipment.

The bq78PL114 provides complete lithium battery system control, monitoring and safety functions for 4-series cells. It integrates accurate battery fuel gauge technology with efficient cell balancing, short-circuit detection and battery protection. The device is completely user-configurable with parametric tables set in Flash memory to support a variety of Li-Ion and Li-Polymer chemistries, operating conditions, safety control and data reporting design requirements.

In addition to the controller, the bq76PL102 dual-cell battery monitor performs simultaneous voltage and temperature monitoring of each cell and reports these parameters over a proprietary PowerLAN communications interface. This allows designers to combine multiple bq76PL102 monitor devices with the bq78PL114 controller to create a smart battery solution for up to 12 rechargeable cells. Realtime communications is possible in all operating conditions, even during widely fluctuating load conditions. The scalable PowerLAN architecture also provides robust communications in tough electromagnetic and RF interference situations, while avoiding excess power draw and a large number of discrete components.

Partitioning of the battery monitoring function cell-by-cell enables a more accurate state of charge measurement. With this in mind, the bq78PL114-based system helps extend battery life and system runtime with TI’s patented PowerPump cell balancing technology. This technology uses a charge-transfer methodology that does not waste excess energy as heat, but moves energy efficiently and dynamically from cell to cell. Precise balancing occurs at every stage of operation – at charge, discharge and rest. With PowerPump technology, cell balancing is automatically coordinated between all cells in the system.

Also new is a device integrating safety and protection for multicell applications with a new lithium-based battery protector and analog front end for 5- to 10-cell battery systems. The bq77PL900, which includes an I²C interface for communication with a host controller, can also operate as a standalone battery protection circuit. The device integrates a 5 V and a 3,3 V LDO to help power the host controller or other circuits in the system.

The low-power battery protection circuit includes a voltage translation system to measure temperature, system current and individual cell voltages. Cell balancing can be performed through bypassing current around selected cells. The bq77PL900 also provides full safety protection for over-voltage, under-voltage, over-temperature and over-current in discharge and short circuit during discharge conditions.

For more information contact EBV Electrolink, +27 (0)21 402 1940, [email protected], www.ebv.com



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Dual-range IMU with edge processing
EBV Electrolink Analogue, Mixed Signal, LSI
ST’s innovative LSM6DSV80X combines two accelerometer structures for 16 g and 80 g full-scale sensing, a gyroscope up 4000 dps, and embedded intelligence in a single component.

Read more...
Powering Innovation eBook: Changing what’s possible
Power Electronics / Power Management
This exclusive read, entitled ‘Changing what’s Possible,’ delves into how power dense Vicor modules enable many world-changing innovations across various sectors.

Read more...
16-channel multicell battery monitor
Altron Arrow Power Electronics / Power Management
The ADBMS6830B is a multicell battery stack monitor that measures up to 16 series-connected battery cells with a lifetime total measurement error of less than 2 mV.

Read more...
Reliable redundancy with the Mibbo M3DN Series
Conical Technologies Power Electronics / Power Management
Designed for use with two parallel-connected power supplies, the M3DN Series allows for true redundancy, making it ideal for mission-critical applications.

Read more...
Automotive power-over-coax inductor
RS South Africa Power Electronics / Power Management
TDK has launched the ADL8030VA, a high-performance inductor designed specifically for power-over-coaxial applications.

Read more...
Rugged PSU for challenging conditions
Conical Technologies Power Electronics / Power Management
Built for rugged reliability, the Mibbo MFC Series delivers stable, efficient power in environments where moisture, dust, and temperature extremes are everyday challenges.

Read more...
Enhance SiC device efficiency using merged-pin Schottky diodes
NuVision Electronics Editor's Choice Power Electronics / Power Management
Silicon carbide (SiC) has advantages over silicon (Si) that make it particularly suitable for Schottky diodes in applications such as fast battery chargers, photovoltaic (PV) battery converters, and traction inverters.

Read more...
15 W power module with wide input range
Brabek Power Electronics / Power Management
RECOM’s miniature power modules provide 15 W output and operate over a wide input range of 18-264 V AC or 18-375 V DC.

Read more...
Industrial-grade DIN rail PSU
Conical Technologies Power Electronics / Power Management
The Mibbo MTR960W is a reliable and cost-effective PSU option that delivers a solid 960 W of output power at 24?or 48 V DC.

Read more...
Energy harvesting and Matter for smarter homes
RF Design Power Electronics / Power Management
Qorvo’s collaboration with e-peas on the Matter Enabled Light Switch marks another significant step in advancing Matter adoption across the IoT industry.

Read more...









While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.




© Technews Publishing (Pty) Ltd | All Rights Reserved