Thermal Runaway - Battery Research

1 1 Warning signs and preventive actionsPresented by Peter DeMarThermal RunawayThermal runaway2If Thermal Runaway does not scare you, then you Runaway Brand new to the stationary Battery industry Ignorant of Thermal Runaway disasters3 Thermal Runaway Someone who realizes there are alwayswarning signs Knows what they are Is applying the correct preventive measures4 What is Thermal Runaway ?CAUSED BY Excess of Battery charging current Produces more internal heat than the Battery can dissipate5 Thermal Runaway can be detected, preventedand recovered fromRecovery = green benefitRECOVER a Battery from Thermal Runaway and continue to use it Reduces carbon footprint for that Battery GREEN benefit for the environment Good for your budget 6 The monster appears unexpectedly?

2 It occurredwithout warning 7 The monster appears unexpectedly? There is ALWAYSan early warning We just did not understand the signals They are obvious There for many months!8 What are these early warning signs? Increase in float current Starts very slowly Increases over time Current throughthe Battery Not necessarily = charger meter9 What are these early warning signs? Increase in float current Starts very slowly Increases over time Current throughthe Battery Gradual increase in the temperature differential between cells and ambient 10 What are these early warning signs?

3 Increase in float current Starts very slowly Increases over time Current throughthe Battery Gradual increase in the temperature differential between cells and ambient 11 These two items when properly checked and tracked will provide substantial warningso that you can take necessary actions to prevent a Thermal runawayWhat causes Thermal Runaway ? Negative plate discharge and sulfation Increase in float current Dry out of cells Loss of electrolyte contact through AGM from plate to plate12= inability of cells to dissipate internally generated excess heatPreventing Thermal Runaway IEEE 1188 standard Maintain overall float voltage correct for ambient temperature Track temp.

4 Differential between cells and ambient monthly Track float current monthly13 Contact us for guidance on what typical float current should be for your batteryHow to take the measurements Hand held meters Monitoring, such as the BEM device Keep accurate records and keep track of records14 Track readings for the life of the batteryRecovery after Thermal Runaway Re establish proper saturation Remove sulfates from the negative plates Install catalysts15 You can take a structurally intact Battery from full blown Thermal Runaway and turn it back into a usable andreliablebatteryPreventing Thermal runaway16 Re establish proper saturation Remove sulfates from the negative plates Install catalystsYou can prevent Thermal runawayby applying these actions earlyWho and what Now

5 That the early warning signs of Thermal Runaway are so easily observed, just who is responsible when it occurs? 17 Who and what Now that the early warning signs of Thermal Runaway are so easily observed, just who is responsible when it occurs? YOU ARE. 18 Who and what Now that you understand that there is a means of recovering a Battery from Thermal Runaway You can be pro active instead of re active You have time to determine just what actions are best for you 19 STATIONARY POWER SERVICES FOR INDUSTRYa WBE Enterprise(800) 221 in DC Systemsa WBE Enterprise(800) 221 HeadquartersGary L.

6 Brewer President1313 County Route 1 Oswego, NY 13126 Toll Free: (800) 221 7123 Phone: (315) 342 2373 Fax: (315) 342 079720 Contact us today for more information on how we can help you!GET IN OUCH+For further information please contact us.