Mechanical Overhead

Levels of Freedom in Layouting Battery System Configurations

• For cells the following levels of freedom exist to combine them to cell blocks in space are shown below.

  • The number of cells in a row is denoted by C_R.

  • The number of rows is denoted by C_N.

  

• For cells blocks the following levels of freedom exist to combine them to modules in space are shown below.

  • The number of cell blocks in a row is denoted by M_R.

  • The number of rows is denoted by M_N.

  

• For modules the following levels of freedom exist to combine them to strings in space are shown below.

  • The number of modules in a row is denoted by S_R.

  • The number of rows is denoted by S_N.

  • The number of layers is denoted by S_L.

  

• For strings the following levels of freedom exist to combine them to a pack in space are shown below.

  • The number of strings in a row is denoted by P_R.

  • The number of rows is denoted by P_N.

  • The number of layers is denoted by P_L.

  

• Introduction of overhead factors O

• Overhead factors describe additional weight and volume caused by the cooling system, busbars, contactors,

• Definition of the system dimensions:

• The cell width is defined as: C_width

• The cell length is defined as: C_length

• The cell height is defined as: C_height

• Pack width: P_W = P_N * O_PN * S_N * O_SN * M_N * O_MN * C_N * O_CN * C_width

• Pack length: P_L = P_R * O_PR * S_R * O_SR * M_R * O_MR * C_R * O_CR * C_width

• Pack height: P_H = P_L * O_PL * S_L * O_SL * C_height

• Pack volume: P_V = P_L * P_W * P_H

• Pack weight: TODO