Source code for RCAIDE.Library.Methods.Powertrain.Sources.Batteries.Common.find_specific_power
# RCAIDE/Methods/Powertrain/Sources/Batteries/Ragone/find_specific_power.py
#
#
# Created: Jul 2023, M. Clarke
# ----------------------------------------------------------------------------------------------------------------------
# METHOD
# ---------------------------------------------------------------------------------------------------------------------- -Ragone
[docs]
def find_specific_power(battery, specific_energy):
"""
Determines specific power from a Ragone curve correlation.
Parameters
----------
battery : Battery
The battery component with the following attributes:
- cell.ragone.const_1 : float
Coefficient in the Ragone curve equation [W/kg]
- cell.ragone.const_2 : float
Exponent coefficient in the Ragone curve equation [kg/J]
specific_energy : float
Specific energy value for which to calculate the specific power [J/kg]
Returns
-------
None
This function modifies the battery object in-place, setting the following attributes:
- specific_power : float
Calculated specific power [W/kg]
- specific_energy : float
Input specific energy value [J/kg]
Notes
-----
This function calculates the specific power of a battery based on its specific energy
using a Ragone curve correlation. The Ragone curve describes the trade-off between
specific energy and specific power in energy storage devices.
The correlation used is:
.. math::
P_{specific} = C_1 \\cdot 10^{C_2 \\cdot E_{specific}}
where:
- :math:`P_{specific}` is the specific power [W/kg]
- :math:`E_{specific}` is the specific energy [J/kg]
- :math:`C_1` and :math:`C_2` are empirical constants
**Major Assumptions**
* The Ragone curve can be accurately represented by the exponential equation
* The correlation is valid across the entire range of specific energy values
See Also
--------
RCAIDE.Library.Methods.Powertrain.Sources.Batteries.Common.find_specific_energy
"""
const_1 = battery.cell.ragone.const_1
const_2 = battery.cell.ragone.const_2
specific_power = const_1*10.**(const_2*specific_energy)
battery.specific_power = specific_power
battery.specific_energy = specific_energy
