The available capacity of the battery.lithium power station manufacture

　　There is also a corresponding capacity in the capacity of the lithium battery is the available capacity. The available capacity may actually only use 80-90%! Because the chemical capacity of the battery just said, the chemical capacity of the lithium battery is when the current is very small. The measured capacity is more determined by the characteristics of the battery itself. In the process of battery use, so many capacity can not be released. In the actual use process, because there is a certain discharge current, the discharge curve will be lower than the opening voltage curve. You can see this one. Due to the internal resistance of the battery, the actual discharge curve is the blue curve. It is worth QUSE by the blue curve and the red curve. In this way, we found that because the existence of the internal resistance of the battery moves the position of this curve down, then the discharge terminal will be reached earlier when discharge, that is, EDV earlier, so QUSE is generally smaller than QMAX.

　　The remaining capacity of the battery is introduced below. The remaining capacity refers to the battery capacity placed in the current state, and EDV is also the termination voltage. In the figure, the current state A is discharged under a given current. When the discharge to 3.0V, the corresponding remaining capacity is marked with R1 from the figure. If in the case of state A, the same relatively large current discharge, at this time the position of the curve will be a little lower than the opening voltage, and it will be lower than the position corresponding to the RM1 of the small current. The remaining capacity is RM2. The difference between the discharge curve corresponding to RM2 and RM1 is that the discharge current used is different. The larger the discharge current, the lower the position of the curve, and the smaller the remaining capacity. The remaining capacity of the battery under the current is different. In the actual use of the battery, some users will find that the battery capacity has changed from less. He feels uncomfortable. In fact We see that the battery capacity changes from small to more. This is usually caused by the sudden turn of the discharge current, because the capacity that the battery can be released at different currents is different. When the discharge current becomes small, it can The release capacity can be increased.

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