User Manual
Doc ID: BSEN
Date: 07-15-19
Page 14
6. Baery simulaon
6.1 Introducon
The purpose of the soware is to simulate a real Lead-Acid or Lithium-Ion baery as close as possible. Because a baery can be a
source or sink of energy, the simulaon can only be fully realized with a bidireconal power supply, such as one of PSB 9000 series.
Together with this soware, the PSB can be considered as a baery with variable parameters, such as:
• Baery voltage
• Baery capacity
• Baery temperature
• Internal resistance
• State of charge
Based upon a single Lead-Acid baery with 12 V nominal voltage or a Lithium-Ion baery with 3.7 V nominal voltage any mulple of
these baery voltages can be simulated, always within the limits of the power supply device, but up to a maximum of 100 baeries in
series and/or 100 baeries in parallel. It means that the max. baery voltage can be 1200 V for Lead-Acid and 370 V for Lithium-Ion.
The simulaon has some advantages over a real baery. You can...
1) dene the baery’s inial state of charge (SOC). With a real baery this is usually unknown.
2) dene an odd or untypical baery capacity.
3) dene any ambient and baery temperature within -10 to +50 °C (14 to 122 °F).
4) charge and discharge the simulated baery without any risk while real baeries can be destroyed by deep discharging or
overcharging.
5) save a lot of me as no charging is required before using the simulated baery as source. The power supply can simulate a
fully or partly charged baery anyme.
6) quickly swap baeries and recongure the simulated baery to completely dierent specicaons without physically discon-
necng and connecng anything.
6.2 Limitaons
Compared to a real baery, there are some baery characteriscs which can’t be simulated:
• Short-circuit current and short-term overcurrent capacity. A baery can deliver an almost unlimited current for a certain
amount of me. The power supply will always limit its output and input current.
• Presence of baery voltage. The voltage of a baery is always present, while a power supply’s DC output is switched on or
o. Switching it on requires some me for the voltage to rise (sostart, ca. 150 ms). The output voltage of a power supply
can furthermore drop very much when it enters current limitaon (CC) or power limitaon (CP). The voltage drop is inversely
proporonal to the current increment.
• Baery temperature sensing. There is no way to provide the simulated baery body temperature as analog value, like when
having any kind of thermal sensor, as oen used with baery chargers. Though the temperature of the simulated baery in-
creases while charging, it’s only a digital value on the user interface (UI) of a soware.
6.3 Running a simulaon
The simulated baery can either be source to any DC load, which is considered as discharging, or it can be sink to any external DC
source, which is considered as charging. The simulaon will automacally switch to charging mode as soon as the external voltage is
higher than the simulated baery voltage and will switch back to discharging mode when the external voltage sinks below the baery
voltage or if there is no voltage at all, which means that discharging mode is the default mode without anything connected to DC.
Starng a new simulaon run consists of basically two steps:
1) Conguraon
2) Inializaon and start
Aer everything has been set up in tab “Baery simulator”, the simulaon is rst inialized by pressing buon “Inialize”. This will
unlock the “Start” buon. Next, buon “Start” would then be clicked to start the simulaon. Aer a stop by any reason there are
two opons:
• You can connue the interrupted simulaon by simply pressing “Start” again or
• You can reset and start a new simulaon by rst pressing “Inialize” and then “Start”
During the simulaon run, the UI will refresh the upper status part (also see secons 5.2.2 and 5.2.3) connuously. The SOC, the
baery state of charge, will addionally be indicated as progress bar. Once the simulaon is running, you would normally stop using
the soware and switch focus to the applicaon where the simulated baery is part of.