Battery battery life estimation

Estimated battery life, refers to the time when determining the load is determined. The battery is used in safety (mA), the unit: AH (MAH when MAH) in time, the meaning of time (mAh) is: the battery is the maximum amount of discharge within an hour. For example, a battery nominal 100ah, we can say that it can continue to output 100A's current over an hour. Therefore, we can use this value to estimate the time used by a battery to drive a load: Battery capacity (AH) X Battery voltage (V) x 0.8x0.9 / load power (W) = working duration (h) battery capacity (AH ) Multiply the battery voltage (V), which is the maximum power output by the battery. The battery will have a protection of electricity. It will be 20% in accordance with the experience. Because the battery has a memory function, electricity, the battery is useless, so the maximum power is to multiply 0.8, this is the actual work of the battery. Power. While the battery cannot be placed, the inverter generally has a problem of conversion efficiency. For the quasi-sinusoidal general efficiency is about 90%, it is selected to be 0.9, the battery capacity X battery voltage x 0.8x0.9 is true reverse The converter can work with the total power of the load. Load Total Power (WH) = Battery Capacity (AH) X Battery Voltage (V) X 0.8x0.9 = Load Power (W) X Work Duration (H) Note: If you can get the front end of the inverter, that is, the power of the battery output As its load power, it is possible not to multiply the current of 0.9 (inverter conversion efficiency), if the current of the battery output end is known, the battery capacity (AH) X 0.8 / output current (a) = working long (h) is similar, If the current of the inverter output is known, the battery capacity (AH) x 0.8x0.9 / Output current (a) = working duration (h) such as: a 12V, 100AH ​​battery to a 220V, 100W light bulb work Time = 12 (V) X100 (AH) X0.8x0.9 / 100 (W) = 8.6 (h) 12V, battery voltage 100AH, battery capacity 0.8, battery discharge coefficient (constant) 0.9, inverter conversion efficiency 100W, The bulb nominal power is 8.6h, and the calculated 100W bulb is powered by a 100AH ​​battery. Read more

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