BMPT Module V.1.0.3 (Optional)

The battery model powertrain (BMPT) module can be used in combination with a battery simulator (BTS). The BTS can operate either as a battery tester or as a battery simulator.

BTS Control

The BMPT can switch on and off the remote control of the BTS and control its most important settings.

The BTS mode is set to 10 and monitored to stay at 10. Additionally, the standard parameter set for operation mode 10 is loaded. (The parameter set is not monitored anymore, since it has not to be 2). In mode 10 the current limit and the voltage can be defined in this module.

Pulse block can be coupled to terminal 15, terminal 30 or decoupled. If SOC and pulse block are activated simultaneously an error or warning is put out in the message system.

Battery Simulation

The output voltage per cell is either set manually or calculated based on the state of charge (SOC) using a polynom of the 4th grade.

The SOC itself can be either set or calculated using the nominal capacity, state of health (SOH) and input current for each time step.

The simulation uses a simplified network (2xR, 1xC).

The capacity C1 and resistance R2 for relaxation modeling, as well as the inner resistance R1, and input current can be parameterized. The resistance R1 can be set.

Using the amount of serial connected cells the cell voltage is scaled to the BTS voltage, while the cell current is divided by the amount of parallel connected cells.

Shutdown Behavior

At each stop (soft stop, hard stop, emergency stop) the BMPT module is informed by the shutdowns that the BTS should be switched off. The module is able to decide whether it is a normal stop (soft stop) or a hard stop (hard stop, emergency stop).

In case the BMPT module detects a normal shutdown (soft stop, BTS off), the voltage is ramped to 0 and pulse block is activated.

In case the BMPT module detects a hard stop or an emergency stop, the pulse block is activated directly and target voltage is set to 0.

Features

  • Battery simulation using a simplified network (2xR, 1xC) or external battery model (DSO) Calculation of the voltage U=f(SOC)
  • SOC can be set or calculated, the polynom can be parameterized SOH can be set
  • Resistance R1 can be set
  • Control of BTS (switch on/off, pulse block on/off, maximum current, voltage) Coupling of pulse block to terminal 15, terminal 30 or uncoupled
  • Voltage is gradient limited
  • Monitoring of BTS control mode, maximum current, voltage and difference between set voltage and actual voltage
  • Add-on userbox for the manual mode
  • Main userbox with the ability to control all functions and change all parameters
  • STMC connection for automatic mode (for BTS and/or battery simulation)

The BMPT module registers automatically in the STMC module. An integration of the add-on userbox in the main GUI of the test case is also possible.