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BRS BIM1 User Manual

BRS BIM1
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Battery Impedance Meters
BRS Messtechnik GmbH
Page 11 of 36
Version 1.7 / April2015
3 Applications
Overview
Measure-
ment Para-
meter
Battery Property
Develop-
ment
Produc-
tion
Mainte-
nance
Service
Voltage
State of charge
(Li-Ion, Lead)
AC-
Resistance
Ageing (SoH)
DC-
Resistance
Operational behavi-
our
Nyquist plot
(Spectral
impedance)
Operational behav-
iour, Beschädigun-
gen, Modellparame-
ter
()
()
Application
Charac-
terization
Selection
Qualificati-
on and
exchange
Diagnosis
Reference parameters
tbd
batch of
cells
adjecent
cells
Data sheet
or initial
measure-
ment
First steps, typical approach
It is good practise to take the following approach for characterising batteries:
Measurement of the open circuit voltage (OCV). The acceptable range can be
taken from the specifications or from the discharge curve.
The menu “Diagnosis” uses typical values which are stored in a spreadsheet,
from which the SoC can be derived.
Measurement of the AC resistance (R
AC
, ESR). In the menu “Single impedance”
choose the standard frequency 1kHz and compare it with the specification.
The function „Diagnosis“ uses this parameter to estimate the ageing (SoH) by
comparing this value with a reference value, which has to be defined once.
For determining the operational behavior measure the DC impedance at 0,5Hz
and compare it with a reference value from a new battery.
For deeper analysis measure the Nyquist plot and compare it with the plot of a new
battery.

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BRS BIM1 Specifications

General IconGeneral
BrandBRS
ModelBIM1
CategoryMeasuring Instruments
LanguageEnglish