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bin liu

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16 Feb 2012 Hybrid Electric Vehicle (HEV) Power Train Using Battery Model Demonstration of a hybrid electric vehicle (HEV) power train using SimPowerSystems and SimDriveline Author: Pierre Mercier

Hi Olivier,
As you said 'The maximum battery power (21kw) is obtained at around 210A (at 90% SOC). At this time, the battery voltage is about 100V (Vbatt).'
what I want to know is that: the maximum battery power (21kw) is obtained only at this point (Ibatt=210A,Vbatt=100V) or can be always be obtained when the vbatt>100V?
In fact, from the simulation 'HEV', I think that when Vbatt>100V, the battery can always give 21kW.
Can you give me the real meaning of this value 'maximum battery power (21kw)'.

15 Feb 2012 Hybrid Electric Vehicle (HEV) Power Train Using Battery Model Demonstration of a hybrid electric vehicle (HEV) power train using SimPowerSystems and SimDriveline Author: Pierre Mercier

Hi Olivier,
First of all, thanks to your reply. I calculated that Pmax(21kW) is obtained at Ibatt=261.248A and Vbatt=80.46V. With this equation: Pbatt=Ibatt*(Voc-Ibatt*R).
However, I found in another model named 'power_FCV_powertrain', also in '\Energy Management Subsystem\Battery Management System\', the value 'Vbatt=288V' which is the same as in the battery model which is set 'Nominal voltage=288V', and the gain V2W is set '2000'. Can you give me some advice?
The most important question for me is: How you calculate the maximum battery power? And how you get the point of battery voltage and battery current?
best wishes

15 Feb 2012 Hybrid Electric Vehicle (HEV) Power Train Using Battery Model Demonstration of a hybrid electric vehicle (HEV) power train using SimPowerSystems and SimDriveline Author: Pierre Mercier

Hi Olivier,
As you said 'The maximum battery power (21kw) is obtained at around 210A (at 90% SOC). At this time, the battery voltage is about 100V (Vbatt)'. The nominal voltage of the battery you used in the model is 200V. It is impossible to be 100V when at 90% SOC.
This problem really confuses me, because the battery parameter(Vbatt) you use is different in the same model.

14 Feb 2012 Hybrid Electric Vehicle (HEV) Power Train Using Battery Model Demonstration of a hybrid electric vehicle (HEV) power train using SimPowerSystems and SimDriveline Author: Pierre Mercier

14 Feb 2012 Hybrid Electric Vehicle (HEV) Power Train Using Battery Model Demonstration of a hybrid electric vehicle (HEV) power train using SimPowerSystems and SimDriveline Author: Pierre Mercier

hello,
I still have one question for this model. There is 'DC/DC converter' block, The DC/DC converter adapts the low voltage of the battery (200 V) to the DC bus which feeds the AC motor at a voltage of 500 V using PI controller. However, in my case, my battery is only 72V(nominal voltage), and I want to keep the DC bus voltage 200V(for example). I found it really difficut tuning the PI contrller to get this value. The value is even not stable.
Can you give me some advice?
best wishes

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