Setting Bciavg Parameters; Setting Bcimap# Parameters; Scope; Procedure - Enfora Enabler LPP G Integration Manual

7.5. Setting BCIAVG parameters

Averaging of the voltage, temperature, and current readings is used to reduce noise or spikes that could
otherwise trigger ill-timed state changes or inaccurate readings. It is up to the user's comfort level what
values should be set. Setting any alfa=0 my give readings that are too noisy, especially in the case of
current readings. Setting alfa to a very large number will cause state transitions to occur later than
desired while the averaging "catches-up".

7.6. Setting BCIMAP# parameters

The BCIMAP# command sets the maps battery voltage and charge current to battery capacity while the
battery is charging. Each battery n may be given a unique BCIMAPn, depending on the battery ID (if
required). Battery capacity is reported as a percentage in 10% steps, no interpolation is given.
When the battery is not charging, BCIPCT# maps battery voltage to battery capacity.

7.6.1. Scope

Default values are intended to be sufficient for general-purpose applications. However, if the battery
capacity mapping needs adjustment for per customer specification, this procedure is one empirical
approach to determining new values.
Production-level calibration not required.

7.6.2. Procedure

The following summary outlines a procedure that requires one complete battery charge and discharge
to determine the battery capacity mappings.


Choose the BCIMAP# index.


Set the desired CI charge current <ci_chgireg> for the designated charger.

Determine the BCIMAP# values up to the <#_ci_elements>.

Determine the BCIPCT# that corresponds to the BCIMAP index.

Calculate the BCIMAP# values for the parameters above the index.

Discharge the battery, determine the remaining BCIPCT# parameters.

Repeat for each battery and charger.
7.6.3. Choose the BCIMAP# index
Select a BCIMAP# index, <#_ci_elements>, that gives good resolution of capacities in the CI
and CV stages of the charge cycle. If the index is too low, the CI stage will have fewer,
disproportionately large capacity steps, and the CV stage will have more, smaller capacity
steps. If the index is too high, the CI stage will have more, disproportionately small capacity
steps, and the CV stage will have fewer, larger capacity steps. From empirical analysis,
is a good balance giving proportional intervals between the capacity steps in both the CI and
CV stages.
LPP0108IG001
<#_ci_elements> = 7 ± 1
Version - Preliminary – 06/20/08
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