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CHARACTERIZING BATTERY

REJUVENATORS

Team Shock Therapy: Tim Blake, David Bankhead, Travis McMillen

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Presentation outline Background Process of Defining the Project Our Problem Definition/Goal Test Setups Procedure Design Matrix Future Work

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Background Goal of Acoustic

Research Detachment Create quieter

NAVY vehicles Use lead-acid

batteries to power their vehicles

A ship uses hundreds of batteries Example: LSV-2

Cutthroat Batteries need to

be replaced every 4 years

NAVY wants to improve battery performance

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Process of Defining the Project NAVY

Originally CCCV vs. Pulse Analyze rejuvenators Indications of health of battery

University of Idaho Navy specs not design, need design project!

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Project Definition/Goals Project Definition

Navy needs a reliable way to extend the life of their batteries.

They are considering using battery rejuvenators.

Project Goal Design a procedure/algorithm that the Navy

can use to characterize their rejuvenators.

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Test setups

RintVOC VLoaded

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Figure 3: Internal Resistance Test Setup

Figure 2: Discharge Test SetupFigure 1: Rejuvenation Test Setup

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ProcedureDischarged

Battery

Internal Resistance Measureme

nt

Rejuvenate Battery

Internal Resistance Measureme

nt

Discharge Battery

Perform Calculations

Decision

Matrix

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Design Matrix

Compared Spec Sheets 35 Ah rating Renaissance RC-2A12-2 BatteryMinder Renaissance RC20A-12-240 Max value Min value standard

Capacity Restoration 80% 95% 65% 100% 0 1.000Internal Resistance 0.097691279 0.110684674 0.354608217 100% 0 1

Time Taken (h) 100 5.579732407 11.13221521 24 0 24   Renaissance RC-2A12-2 BatteryMinder Renaissance RC20A-12-240 Weight

Capacity Restoration 0.80 0.95 0.65 60%

Internal Resistance 10% 11% 35% 20% Legend

Time Taken (h) -3.17 0.77 0.54 20% -1 - 0.3 Terrible, do not use

0.3 - 0.7 Okay

-0.132277439 0.744766765 0.565751983 0.7-1 Great

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Future work Automated control system Verification of 2 Volt batteries Quantify Internal resistance of batteries Compare constant current constant

voltage to pulse rejuvenators First 10 min. of a rejuvenation.

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First 10 min. of Rejuv.

0 1 2 3 4 5 6 7 8 9 1011.511.611.711.811.9

1212.112.2

Rejuvenation of Used Battery #3 with Bat-teryMINDer Rejuvenator

Time (Minutes)

Volta

ge (

V)

0 1 2 3 4 5 6 7 8 9 1011.811.9

1212.112.212.312.412.512.6

Rejuvenation of Unused Battery #4 with BatteryMINDer Rejuvenator

Time (Minutes)

Volta

ge (

V)

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Conclusions Pulse rejuvenators work

BatteryMINDer works the best Most important characteristics have been

determined in characterizing a rejuvenator

Difference between two batteries pulsing in first 10 min.

Recommend pulse charging for the next charge setup

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Special Thanks to…. Acoustic Research Detachment of the

Navy Jim Klein Dr. Herb Hess Dr. Greg Donohoe Dr. Touraj Assefi

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QUESTIONS