Battery and System Health Monitoring of Battery Powered Smart Flow Meters Reference Design


Design files


This reference design showcases innovative solutions for battery and system health monitoring of battery-powered Smart Flow Meters.  The battery monitoring subsystem provides highly accurate energy measurement and State of Health(SOH) projections which forecast battery lifetime. The system monitoring subsystem protects against over current conditions which can dramatically reduce battery life.  The techniques demonstrated here can help extend the effective life of battery-powered meters and optimize total cost of ownership for utility operators.

  • Monitors the State-Of-Health of non-rechargeable lithium batteries
  • Accurately predicts the End-Of-Service of non-rechargeable lithium batteries
  • Low power system monitoring with ADS7142 SAR ADC and LPV521 op-amp
  • Single channel load switch to connect/disconnect system load
  • Supports Lithium Thionyl Chloride (LiSOCl2) and Lithium Manganese Dioxide (LiMnO2)
  • Low standby power consumption of 1uA for system health monitoring and 1uA for battery monitoring

This updated version of the design allows easier adaptation of the board to different use cases.
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDO5A.PDF (17559 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRVG0A.ZIP (42517 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery fuel gauges

BQ35100Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor

Data sheet: PDF | HTML
General-purpose op amps

LPV521Single, 5.5-V, 6.2-kHz, ultra low quiescent current (350-nA), 1.6-V min supply, RRIO op amp

Data sheet: PDF | HTML
Load switches

TPS228600.73-Ω, 5-V, ultra-low leakage load switch

Data sheet: PDF | HTML
Precision ADCs

ADS714212-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package

Data sheet: PDF | HTML

Start development


Technical documentation

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Type Title Date
* Design guide Battery and System Health Monitoring for Smart Flow Meters Reference Design (Rev. A) Jul. 17, 2018
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Technical article Facing smart meter design challenges, part 1: maximizing battery life PDF | HTML Aug. 16, 2018

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