Battery identifiers:
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Model and Manufacturer will appear in the
batteries choice lists. |
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Data source usually refers to the data
source (most often Manufacturer, may be an independent institute or
your own measurements). |
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|
File name should have the extension
'.BTR' |
Technology
(lead-acid)
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Technology specifies vented or sealed
(without maintenance) batteries, and tubular / plates / vehicle
starting technologies. |
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All Lead-acid batteries are made
of 2V-elements in series (12, 6 or one element).
A big capacity battery unit is 1 only element. |
Basic
parameters:
The most
important battery specifications present on any manufacturer data
sheet.
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Number of elements in series, |
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Nominal voltage: is always 2V per
element for lead-acid batteries. |
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Nominal capacity: the reference
capacity is specified for a discharge rate in 10 hours (noted
C10) and for a reference
temperature of 20°C. Capacity behavior according to discharge
rate and temperature will be defined in the next sheet. |
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|
Internal resistance is considered to be
constant (in approximation). If not specified you can ask for a
reasonable default. |
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|
Reference temperature is the reference
temperature used by the model to set 2 corrections: the Open
Circuit Voltage correction as a function of temperature, and the
capacity correction as a function of temperature (Detailed
model parameter). |
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|
Coulombic efficiency (or
faradic or current efficiency), is the discharge/charge
cumulative currents balance, in [Ah]. For a working range below the
overload, i.e., without dissociation of the electrolyte ("gassing"
phenomenon appearing at approximately 85 to 90% of full charge), it
is generally approximately 97% for lead-acid batteries. |
Gassing
When the
state-of-charge increases, the dissociation progressively appears,
and is manifested on the one hand as an excess of voltage in
relation to the normal charge curve, and on the other hand by a
production of gaseous oxygen and hydrogen, which consumes a part of
the charge current by electrolysis, thus disturbing the
determination of efficiency. The real efficiency therefore depends
on the working conditions and on the regulation. It will be
quantified during simulation, and the current lost in electrolysis
will give an estimation of the quantity of dissociated
electrolyte.
In all of these
definitions the voltage specifications may be displayed either by
cell or for the whole battery.
All these
parameters may be shown either for one cell, or for the whole
battery.
