PS810 查看數據表（PDF） - Microchip Technology
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PS810 Datasheet PDF : 46 Pages
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PS810
TABLE 4-2: VALUE NAMES IN THE MEMORY
TEOD(1) TEOD(2) TEOD(3) TEOD(4)
CEOD(1) VEOD1(1) VEOD1(2) VEOD1(3) VEOD1(4)
CEOD(2) VEOD2(1) VEOD2(2) VEOD2(3) VEOD2(4)
CEOD(3) VEOD3(1) VEOD3(2) VEOD3(3) VEOD3(4)
CEOD(4) VEOD4(1) VEOD4(2) VEOD4(3) VEOD4(4)
CEOD(5) VEOD5(1) VEOD5(2) VEOD5(3) VEOD5(4)
CEOD(6) VEOD6(1) VEOD6(2) VEOD6(3) VEOD6(4)
CEOD(7) VEOD7(1) VEOD7(2) VEOD7(3) VEOD7(4)
CEOD(7) VEOD8(1) VEOD8(2) VEOD8(3) VEOD8(4)
FCCP(1) FCCP(2) FCCP(3) FCCP(4)
TEOD(5)
VEOD1(5)
VEOD2(5)
VEOD3(5)
VEOD4(5)
VEOD5(5)
VEOD6(5)
VEOD7(5)
VEOD8(5)
FCCP(5)
TEOD(6)
VEOD1(6)
VEOD2(6)
VEOD3(6)
VEOD4(6)
VEOD5(6)
VEOD6(6)
VEOD7(6)
VEOD8(6)
FCCP(6)
TEOD(7)
VEOD1(7)
VEOD2(7)
VEOD3(7)
VEOD4(7)
VEOD5(7)
VEOD6(7)
VEOD7(7)
VEOD8(7)
FCCP(7)
TEOD(7)
VEOD1(8)
VEOD2(8)
VEOD3(8)
VEOD4(8)
VEOD5(8)
VEOD6(8)
VEOD7(8)
VEOD8(8)
FCCP(8)
4.4.2 COMPENSATING FOR CELL AGING
As lithium ion cells age, the voltage versus capacity
curves become depressed. That is, the battery cell can
no longer deliver as high of a voltage as it once could
for a given capacity. The overall capacity loss is
adjusted for by the relearning of full charge capacity.
The End-Of-Discharge voltage points, which are
voltage points at which a certain capacity remains, are
adjusted using a scaling factor.
The End-Of-Discharge voltage points will become lower
with each cycle. A cycle is defined as a total amount of
discharge capacity equal to full charge capacity. Cycle
count is used to determine the age of the cells and the
parameter, AgeFactor, determines the number of milli-
volts that the voltage becomes depressed per cycle.
AgeFactor is subtracted from the End-Of-Discharge
voltage for every cycle the battery has been through.
AgeFactor units are in eighths of millivolts. Thus, with
the effect of aging, the actual End-Of-Discharge voltage
becomes:
EQUATION 4-2:
VEODaged = VEOD – (CycleCount * AgeFactor * 0.125) mV
© 2006 Microchip Technology Inc.
DS21904C-page 15
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