Why should a storage battery operate at an ambient temperature of 25°C?
During the discharge process, temperature affects the conversion of the battery's internal chemical energy. As shown in the chart above, using a 0.1C discharge current as an example: at 10°C, the discharge capacity is about 90%; at 20°C, it is about 98%; at 25°C, it is 100%; and at 30°C, it is about 102%. For each 1°C increase, the discharge capacity increases by about 0.4-0.7%, and this change is not linear. From this perspective, doesn't a higher temperature result in greater battery capacity? Yes, but this also accelerates the internal chemical reactions of the battery, leading to over-discharge and, in turn, reducing the battery's lifespan.During battery use, it is important to be mindful of the temperature's impact on the battery and implement proper temperature control to prevent premature failure. According to the GB50174-2017 Data Center Design Code, the recommended working temperature for batteries is 20-30°C. The YD/T 799-2010 standard for valve-regulated sealed lead-acid batteries specifies that the battery capacity is 100% at 25°C. Therefore, it is recommended to set the ambient temperature of UPS systems in server rooms to 20-25°C
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