Under what circumstances will thermal runaway occur during UPS battery float charging

Label: Under what circumstances will thermal runaway occur during UPS battery float charging? Under normal circumstances, the UPS battery float voltage is 2.23V/cell (25°C), and the maximum charging current is not more than 25%A of the rated capacity. When the temperature is below 0C or above 40C, it is necessary to correct the charging voltage. With 20C as the starting point, for every degree change, the single cell voltage changes -3mv. If the total voltage during the charging process or the indicator value of the voltmeter on the indicator plate deviates from the reference value (±0.05V/single cell) during floating charging, the cause should be investigated and dealt with. If you do not work in this floating charge range, but use 2.35V/cell (25℃), thermal runaway will occur after 4 months of continuous charging; or use 2.30V/cell (25℃) and charge continuously for 6~ Thermal runaway will occur in 8 months; if 2.28V/cell (25°C) is used, severe capacity drops will occur for 12 to 18 consecutive months, leading to thermal runaway.
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