Battery HIL simulation

Model overview
  • Using a lightweight battery model mathematical formula/abstraction technology that enables environment verification with MATLAB/Simulink® of MathWorks, realizes an equivalent circuit-based battery model with a light calculation load.
  • It is possible to match the OCV open circuit characteristics/material characteristics of the actual battery by adjusting the parameters.
  • Dynamic charge/discharge characteristics, temperature characteristics, and heat loss characteristics are realized.
    Example: Express changes in charge/discharge characteristics due to changes in load current and battery temperature, and changes in temperature due to heat loss
  • Easy to adjust due to few model parameters
Model offer NEXTY Electronics Corpration. location Minato-ku, Tokyo and Aichi Prefecture, Nagoya City

When this model is implemented in "Byakko" (White Tiger)

特長

Features

  1. It is possible to check the results individually for each cell. Since it is provided as an operation model, corner cases such as temperature and load limits that are difficult to achieve with an actual battery can be simply verified without worrying about the storage environment such as the weight and temperature peculiar to the battery.
  2. Short-time emulation of multiple cells is possible. Since up to 512 cells can be mounted, it is possible to perform verification that takes a very long time, such as SOC estimation accuracy verification, which is difficult to verify on a normal PC, at high speed.
Application example
  1. Verification of SOC estimation accuracy: Accuracy verification is possible by comparing the output SOC actual value of Byakko and the estimated output SOC of BMS-CPU
  2. Alarm verification: Function verification is possible by comparing the output voltage/current/temperature information of Byakko and the output alarm signal of BMS-CPU.

Input/output parameter example

Input variable unit Output variable unit
Battery load current A Battery charge rate  
Environmental humidity ℃ Battery voltage V
Heat coefficient   Battery humidity ℃
Number of cells (maximum 512) Individual    
Input constant Input constant
Rated capacity Battery charge rate
Battery heat capacity Nonlinear polynomial coefficient of release time circuit voltage
Battery thermal conductance Nonlinear polynomial coefficient of internal resistance
Humidity coefficient Coefficient of nonlinear polynomial of internal capacitance
Full charge voltage
byakko

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