Battery fuel gauges

Accurate gauging products for any battery system

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We offer highly accurate gauges for applications ranging from smartphones, notebooks and power tools to vacuums and energy storage systems (ESS). There are gauges equipped with integrated protection or for higher voltage applications up to 15 cells in series. Our patented gauging algorithms help gauges accurately measure state of charge and state of health for a variety of chemistries including li-ion, LiFePO4 and NiMH.

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Battery monitors and balancers

Enable innovative battery management with our fully featured high accuracy battery monitors and balancers portfolio. 

Battery charger ICs

Learn more about how our battery charger portfolio enables high power density design multi-chemistry compatibility, and supports various input sources with different charging topologies.

Battery protectors

Protectors boast a reduced feature size and low power dissipation, ideal for small form factor products while offering both primary and secondary protection options.

Find your battery fuel gauge

BQ27Z558
Battery fuel gauges

Single-cell Impedance Track™ technology gas gauge with 1.2V IO support

Approx. price (USD) 1ku | 0.55

Technical resources

White paper
White paper
Impedance Track Based Fuel Gauging
What makes our gauges so special? Patented gauging Impedance Track™ technology allows for higher accuracy. If you are interested in learning more about this technology, download this white paper.
document-pdfAcrobat PDF
Application note
Application note
Gauge Communication
Battery gauges have a rich set of parameters that enable compatibility with a wide range of battery types and applications. Learn how to program these parameters and read gauge results.
document-pdfAcrobat PDF
Video
Video
Battery Protector, Monitor or Gauge?
This short overview provides a short summary of system requirements to help you choose a battery protector, monitor or gauge.

Discover featured applications

Medical
Create a safe and long-lasting battery system in medical applications with our battery gauge technology
E-mobility
Know when you need to charge in e-mobility applications with our battery gauge technology
Retail automation & payment
Enable efficient battery usage in retail automation and payment applications with our battery gauge technology
Vacuum robot
Create longer run times and fewer trips back to base with our battery gauge technology

Create a safe and long-lasting battery system in medical applications with our battery gauge technology

Benefits:

  • Protection integrated into the battery gauge increases confidence in battery management system safety while reducing system costs.
  • Features such as the maximum chemical capacity (QMax) allow battery management systems to last as long as safely possible, whether used daily or sitting on a shelf.
  • A maximized battery lifespan through cell balancing prevents any individual cell from becoming over- or under-charged.

Featured resources

REFERENCE DESIGNS
  • TIDA-00553 – Multi-Cell Battery Manager Unit with Integrated Charging, Gauging, Authentication and Protection
  • PMP5722 – Single Cell Battery Power Solution Reference Design
PRODUCTS
  • BQ27Z561-R2 – Impedance track battery gas gauge solution for 1-series cell li-ion battery packs
  • BQ40Z50-R2 – 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0
  • BQ35100 – Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor
HARDWARE DEVELOPMENT
  • BQ27Z561EVM-011 – BQ27Z561 1S-cell programmable battery manager Evaluation module
  • BQ40Z50EVM-561 – BQ40Z50 evaluation board 
  • BQ35100EVM-795 – bq35100 Lithium Primary Cell Evaluation Module Using End-of-Service Monitor Gas Gauging
DESIGN TOOLS AND SIMULATION
  • BQSTUDIO – Battery Management Studio (bqStudio) Software

Know when you need to charge in e-mobility applications with our battery gauge technology

Benefits:

  • Built-in authentication prevents the use of any third party or unofficial battery packs, increasing confidence that the system will work as intended.
  • An integrated black-box feature provides lifetime data upon unexpected results.
  • An operating temperature range of -40°C to 150°C ensures reliability in almost any environment

Featured resources

REFERENCE DESIGNS
  • TIDA-010030 – Accurate gauging and 50-μA standby current, 13-S, 48-V li-ion battery pack reference design
  • TIDA-00255 – 15 Cell Lithium Ion Battery Controller Analog Front End Reference Design
  • TIDA-00792 – Multi-Cell 36-48V Battery Management System Reference Design
PRODUCTS
  • BQ34Z100 – 1-s to 16-s Impedance Track™ fuel gauge | battery gas gauge
  • BQ78350-R1A – CEDV li-ion gas gauge and battery management controller
HARDWARE DEVELOPMENT
  • BQ34Z100EVM – Bq34z100EVM 1s to 16s Impedance Track Fuel Gauge Battery Evaluation Module | Gas Gauge Battery
  • BQ76940EVM – BQ76940 evaluation board with BQ78350
DESIGN TOOLS AND SIMULATION
  • BQSTUDIO – Battery Management Studio (bqStudio) Software

Enable efficient battery usage in retail automation and payment applications with our battery gauge technology

Benefits:

  • Precise gauging algorithms ensure the battery's exact state of charge.
  • Single-cell gauges in die size ball-grid array (DSBGA) packaging enables a small footprint.
  • A chemistry-ID system allows for shorter design cycles without sacrificing gauge accuracy.

Featured resources

REFERENCE DESIGNS
  • PMP40496 – 2-cell boost charge system reference design with 5-V USB
  • TIDA-00593 – Single Cell Li-Ion Battery Pack-side Fuel Gauge Reference Design
PRODUCTS
  • BQ27426 – Single cell System-side battery fuel (gas) gauge w/Pre-programmed chemistry Profile
  • BQ28Z610-R1 – Battery fuel gauge with integrated protector for 1-2 series packs
  • BQ27Z561-R2 – Impedance track battery gas gauge solution for 1-series cell li-ion battery packs
HARDWARE DEVELOPMENT
  • BQ27426EVM-738 – BQ27426 EVM for Impedance Track Fuel Gauge w/Easy to Use Pre-programmed Chemistry Profiles
  • BQ28Z610EVM-532 – BQ28Z610 1-Cell to 2-Cell Programmable Battery Manager Evaluation Module
  • BQ27Z561EVM-011 – BQ27Z561 1S-cell programmable battery manager Evaluation module
DESIGN TOOLS AND SIMULATION
  • BQSTUDIO – Battery Management Studio (bqStudio) Software

Create longer run times and fewer trips back to base with our battery gauge technology

Benefits:

  • ±1-mV gauging accuracy enables longer run times and fewer trips back to base.
  • Built-in authentication prevents the use of any third party or unofficial battery packs, increasing confidence that the system will work as intended.
  • Maximized battery lifespan through cell balancing prevents any individual cell from becoming over- or under-charged.

Featured resources

REFERENCE DESIGNS
  • TIDA-00883 – 1 to 4 Series Cell Li-Ion Battery Pack Manager Reference Design
  • TIDA-00553 – Multi-Cell Battery Manager Unit with Integrated Charging, Gauging, Authentication and Protection
PRODUCTS
  • BQ40Z50-R2 – 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0
  • BQ4050 – 1-4 series CEDV battery fuel (gas) gauge
HARDWARE DEVELOPMENT
  • BQ40Z50EVM-561 – BQ40Z50 evaluation board 
  • BQ4050EVM-561 – 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module
DESIGN TOOLS AND SIMULATION
  • BQSTUDIO – Battery Management Studio (bqStudio) Software

Design & development resources

Application software & framework
Battery Management Studio (bqStudio) Software

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)

Calculation tool
Gauging Parameter Calculator
Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
Support software
MathCAD compensated end of discharge voltage (CEDV) tool

Math calculation and simulation tool that helps the battery designer to obtain matching CEDV coefficients for the specific chemistry in the battery pack using one of TI’s CEDV algorithm based fuel gauge. It accepts 3 pairs of log files that can be created by using TI’s bq Smart Battery Builder (...)

Reference designs related to Battery fuel gauges

Use our reference design selection tool to find designs that best match your application and parameters.