Generic Requirements for the Detection and Control of Thermal Runaway in VRLA Batteries
Document Number GR-1515
Issue Number 01
Issue Date Nov 1994
Replaces TA-NWT-001515 Issue01
Components of this product are:
ABSTRACT: This document contains the Telcordia view of generic requirements for a monitor to detect and mitigate thermal runaway in Valve
Regulated Lead Acid (VRLA) batteries. VRLA batteries are deployed in confined locations, and their dense packing makes it difficult
to dissipate the heat generated on charging. This excess heat can, under certain conditions, lead to thermal runaway. Two important
causes of thermal runaway are high ambient temperatures and a shorted cell(s), which raise the charging voltage of the remaining cells.
The function of the monitor and controller is to detect the conditions that lead to thermal runaway and positively control the
charging regime to reduce the heat build-up in the battery and, at the same time, to send alarms to the surveillance center to alert
craftspersons to intervene and avoid damage to the battery and adjacent equipment.
GR-1515 replaced TA-NWT-001515.
When using GR-1515, you may need to refer to GR-63, GR-221, SR-332, GR-487, GR-1089, the NEC, and the NESC. You
may also want to refer to TR-NWT-000154, TA-NWT-000406, SR-4228 (replaced TR-NWT-000766), and/or GR-1200.
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