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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Cell count
Cell chemistry
Communication interface
Getting started with Impedance Track™ technology for battery gauging
Learn what battery gauging is and why you need it
It's imperative that you know the remaining capacity in your battery-powered devices, from mobile phones to vacuum cleaners to electric vehicles. Our battery gauges can provide your system with accurate state-of-charge and state-of-health information, extending battery run time and reducing dead battery anxiety.
Battery Gauging Algorithm Comparison
Choosing Between Battery Gas Gauges & Monitors to Track Charge Availabilility
Benefits of Battery Gauges and Protectors in Medical Applications
Featured products for Impedance Track battery gauges
Deep dive into Impedance Track technology
Learn more about the Impedance Track battery gauging algorithm and how it works. Impedance Track technology uses many different factors to calculate state of charge, including depth of discharge (DOD), total chemical capacity (Qmax), internal battery resistance dependence on DOD, current load and temperature.
Deep dive into TI's Impedance Track technology
Impedance Track frequently asked questions (FAQ) home page
Evaluation 3: Theory/Implementation Impedance Track Battery Fuel-Gauging Algo (Rev. B)
Featured products for Fuel gauges
Enable more advanced battery monitoring
Take a look behind the scenes of our Dynamic Z-Track™ technology, the industry's latest battery gauging algorithm. Dynamic Z-Track builds on our existing Impedance Track™ technology to deliver even higher performance, specifically with unpredictable and extremely dynamic loads on the battery.
Dynamic Z-Track™ Technology: An Advanced Battery Gauging Algorithm for Dynamic Load Applications (Rev. A)
Redefining battery accuracy: How the Dynamic Z-Track™ algorithm predicts unpredictable battery loads
Get started with BQStudio
BQStudio offers a full suite of tools to assist with the process of evaluating, designing with, configuring, testing or using our battery-management products. Learn more about how to use BQStudio here.
Introduction to BQStudio and TI tool chain for gauge evaluation
Information to Provide When Reporting Issues With TI Gauges
Learn how to optimize your battery gauge performance
It is only through correct configuration that you can obtain the best performance from Impedance Track technology-based battery gauges. The two major steps in configuring a gauge are programming the correct chemical ID (ChemID) and performing a learning cycle.
Simple Guide to CEDV Data Collection for Gauging Parameter Calculator (GPC) (Rev. B)
Golden GG Maker and Resistance Temperature Compensation Optimizer (Rev. A)
Impedance Track Gauge Configuration For Dynamic Loads (EPOS)
Helpful resources
Now that you have performed your learning cycle and configured your Impedance Track technology-based battery gauge, it's time to go to production.
Gauge Communication
Information to Provide When Reporting Issues With TI Gauges
SMBus Made Simple
Technical resources
Dynamic Z-Track™ Technology: An Advanced Battery Gauging Algorithm for Dynamic Load Applications (Rev. A)
Gauge Communication
Battery Protector, Monitor or Gauge?
Discover featured applications
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
- TIDA-00553 – Multi-Cell Battery Manager Unit with Integrated Charging, Gauging, Authentication and Protection
- PMP5722 – Single Cell Battery Power Solution Reference Design
- 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
- 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
- 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
- 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
- BQ34Z100 – 1-s to 16-s Impedance Track™ fuel gauge | battery gas gauge
- BQ78350-R1A – CEDV li-ion gas gauge and battery management controller
- BQ34Z100EVM – Bq34z100EVM 1s to 16s Impedance Track Fuel Gauge Battery Evaluation Module | Gas Gauge Battery
- BQ76940EVM – BQ76940 evaluation board with BQ78350
- 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
- 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
- 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
- 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
- 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
- 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
- BQ40Z50-R2 – 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0
- BQ4050 – 1-4 series CEDV battery fuel (gas) gauge
- BQ40Z50EVM-561 – BQ40Z50 evaluation board
- BQ4050EVM-561 – 1 Series, 2 Series, 3 Series, and 4 Series Li-Ion Battery Pack Manager Evaluation Module
- BQSTUDIO – Battery Management Studio (bqStudio) Software
Design & development resources
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 (...)
Gauging Parameter Calculator
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 (...)
New products
Single-cell Dynamic Z-Track™ fuel gauge with protector, current limiter and authentication
Approx. price (USD) 1ku | 1.43
Pack-Side Single Cell Fuel Gauge with Integrated Protector and Dynamic Z-Track
Approx. price (USD) 1ku | 1