The sub system Power Unit combines all EV elements in the power part for charging. This starts with the Battery from the typhoon core library. This can be charged either by Bidirectional AC-DC Converter (Generic) for symmetric loaded charging or by 3 single phase converters for asymmetric or single phase charging.
Connections for DC charging or EV consumptions are activated with contactors.
Contactors and battery are controlled by BMS, which reports the different states.
In the BMS, battery conditioning is also prepared.
component
component dialog
parameters
property tabs
General
Charging
Inverter
Battery
Power Stage
Core of the Power Unit is the Battery of the electric vehicle. Several power flows are possible and are controlled from Battery Management System BMS.
Contactor switch_driving connects the external DC connection for a current source emulating driving and EV consumption.
Current source I cond creates current flow for battery conditioning. The thermal model can be integrated into the BMS.
Contactor Switch_DC connects the DC ports DC+- for external current source (e. g. from P-HIL) for DC charging.
AC charging is measured by a metering unit. The reference points for the AC/DC converters are adapted in set Power. The reference depends on the type of converter, which is defined with the checkbox asymmetric charging in the tab inverter. Dependent on the value converter is exchanged:
True : The 3 single phase converter enables charging with one phase or also different current on the three phases.
False : The Bidirectional AC-DC Converter (Generic) from typhoon core library is inserted and allows an efficient resource modelling with symmetrical loading of the three phases.
Control and BMS
The BMS manages all contactors in the Power Unit and also checks limit curves. In the following schematic, the value integration is visualized. For details please check the documentation BMS.
Input and Output
On power stage the following ports are available:
L (3) 3 phases for AC charging. Corresponds to neutral connector N
DC+- (2) DC plus und minus for DC charging
DDC+ and DDC- for connection of internal consumers
Inputs
Power Unit has all inputs combined in an array PU in for signal flow to e.g. interact with the EVCC. To join the values, the additional components Power Unit In is recommended.
For Inputs it can be selected in the mask, which unit is controlable via an input port or a Scada Input.
element
mask
block diagram
Number
Input
Description
range
default
1
Mode Bat
Batter Mode
2
Mode Power
In which Power Mode (AC, DC, ...) the system is operated
3
Reset Battery
4
Condition Battery
5
I ref a
6
I ref b
7
I ref c
8
tan ref a
9
tan ref b
10
tan ref c
11
T amb
Outputs
Power Unit has all outputs combined in an array PU out for signal flow to e.g. interact with the EVCC. To split the values, the additional components Power Unit Out is recommended.
For Outputs it can be selected in the mask, which unit is provided as a port output or as internal probe.
element
mask
block diagram
Number
Output
Description
range
default
1
BMS state
2
Battery state
3
Icond set
4
BMS I limit
5
Vbat min
6
Vbat max
7
Tmin
8
Tmax
9
SOC
10
Vbat
11
Ibat
12
Pbat
13
Vrms a
14
Vrms b
15
Vrms c
16
Irms a
17
Irms b
18
Irms c
19
P
20
Q
21
S
22
PF
23
I dc
24
I drive
25
T bat
Dialogue box and Parameters
The Power Unit subsystem is organized in four tabs.