The preferred SOC reference should be the rated capacity of a new cell rather than the current capacity of the cell. This is because the cell capacity gradually reduces as the cell ages. For example, towards the end of the cell's life its actual capacity will be approaching only 80% of its rated capacity and in this case, even if the cell were fully charged, its SOC would only be 80% of its rated capacity. Temperature and discharge rate effects reduce the effective capacity even further. This difference in reference points is important if the user is depending on the SOC estimation as he would in a real gas gauge application in a car.
ASUS A43B battery info:
Battery Type: Li-ion
Capacity: 5200mAh / 6Cell
Property: ASUS Original Battery
It is not possible either to measure directly the effective charge in a battery by monitoring the actual charge put into it during charging. This is because of the Coulombic efficiency of the battery. Losses in the battery during the charge - discharge cycle mean that the battery will deliver less charge during discharge than was put into it during charging.
ASUS A43BY battery Compatible original Battery Code:
Typical cell specifications only give the capacity at 25 oC and 0.3 C rate. The graph below shows the combined effect of rate and temperature on the effective cell capacity. Note that the available capacity is reduced at high discharge rates and though there is a slight capacity reduction when operating at high temperatures, there is a substantial reduction at low temperatures. Similar effects come into play during the charging cycle.
Once the cells have been characterised the next step is to consider the battery application. Coulomb counting is used to provide an intial estimate of the cell SOC and this value is then modified to take account of the cell's unusable capacity corresponding to its operating point by referring to the look up table. Thus the SOC estimation is accomplished by building a model of the battery which replicates the battery characteristics in software and an algorithm which predicts its behaviour in response to various external and internal conditions.
ASUS A43E battery Fit machine:
ASUS A43 Series
ASUS A43B ASUS A43BY ASUS A43E
ASUS A43F ASUS A43J ASUS A43JA
ASUS A43JB ASUS A43JC ASUS A43JE
ASUS A43JF ASUS A43JG ASUS A43JH
ASUS A43JN ASUS A43JP ASUS A43JQ
ASUS A43JR ASUS A43JU ASUS A43JV
ASUS A43S ASUS A43SJ ASUS A43SV
Based on thermochromic and conductive inks, a thin layer of conductive ink is applied in a wedge shape. The narrowest point indicates the lowest charge level and the widest area indicates a full charge. When the circuit is completed and current flows through the conductive ink and the resistance of the ink causes it to heat up. A small amount of current can generate enough heat to affect the smallest area of the wedge but as the area widens more current is needed to raise its temperature. The thermochromic ink printed on top of the conductive ink changes colour depending on the temperature and the extent of the colour change along the wedge indicates the magnitude of the current and hence the ASUS A43U battery voltage.
These drawbacks are far out weighed by the advantages of Lithium cells and are now being used in an ever widening range of applications.
Lithium Nickel based cells provide up to 30% higher energy density than Cobalt but the cell voltage is lower at 3.6 Volts. They also have the highest exothermic reaction which could give rise to cooling problems in high power applications. Cells using this chemistry are therefore not generally available.
Are an eco-friendly trio. All three are pretty spirited, they can go from 0-60mph in less than 11 seconds. The E-Cell uses a pure ev design with lithium ion HP laptop batteries and electric motors. The E-Cell Plus uses lithium ion batteries and electric motors to drive the wheels but also features a petrol-powered engine to charge the batteries. The F-Cell uses hydrogen fuel cells to power the electric motors. Only the E and F have zero tailpipe emissions. Confused? Heck, so am I!!! The vehicles are also expected to come in the funkiest of colors.