电池寿命计算
电池寿命计算器是一种工具，用于计算电池的使用寿命。电池是一种能够将化学能转换为电能的装置，它可以用于供电各种电子设备，如手持设备、便携式工具、遥控器、电子玩具等。电池的寿命取决于多种因素，包括其化学成分、设计、工作环境、使用情况等。电池寿命计算器通常需要输入电池的化学成分、电池容量、电路负载、环境温度等参数，然后计算出电池的预期寿命。寿命可以表示为使用小时数、使用次数或其他参数。计算器可能还会给出电池更换时间表，以帮助用户计划更换电池的时间。
The calculator calculates the battery's working time based on battery capacity and load.
among them：
IBAT (Maximum) is the maximum battery current, which is given in the RTC data sheet.
IBAT (Typical) is a typical battery current defined at +25 ° C and nominal supply voltage, which is given in the RTC data sheet.
The operating time (days and years) of the backup battery is estimated using the formula Ah/A, where Ah is the battery capacity expressed in ampere-hours, and A is the load current expressed in amps.
According to the Arrhenius model calculation, consider the backup battery working time under the condition of self-discharge of the battery:
The life-acceleration test estimates the hours before the 1% failure (TTF) and the activation energy (EA). As the operating temperature increases, the self-discharge of the battery will significantly affect the overall operating life of the battery.
In any case, assuming an activation energy of 1 eV, the TTF for several common batteries is given in the table below. In the calculation, the stress temperature (T2) is assumed to be +110 ° C (+383 ° K). Note that different manufacturers, different battery model serial numbers, may have different 1% TTFs, depending on manufacturing tolerances. Contact the battery manufacturer for reliability data of the actual model.