This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.

This is a simple battery example, showing how a battery voltage depends on both the discharge current and time.

As the battery is discharged, the voltage drops. This is primarily because a battery is an electro-chemical reactor. As the reactants are used up, the product of the reaction (electrical energy) is reduced.

Counter-intuitively, though, if you allow the battery to 'rest' for a bit, the voltage goes back up! This is because the reactor is still working, albeit somewhat slower, due to the reduction in available reactants.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

see also http://www.systemvision.com/design/dynamic-equivalent-circuit-model-lifepo4-batteries

parameters:

initial SOC [no units] (0.0 - 1.0)

initial charge capacity [Coulombs] (> 0.0)

This is a simple test circuit for a lithium battery. The current sources first discharge and then recharge the battery.

The battery models the anode as a porous substrate that is plated with a metal and then filled with lithium. The resistance of the metal is calculated from the resistivity of the metal (an input parameter). The battery capacity is calculated assuming that the lithium is the limiting reactant.

The open circuit voltage is modeled as a function of state-of-charge (Nerst equation).

Three loss mechanisms are included:

(1) Activation voltage drop (Tafel equation)

(2) Ohmic losses (resistivity of substrate and plating)

(3) Transport losses (empirical)

surface charge storage is modeled as a time delay between the instantaneous activation voltage and the effective activation voltage.

This circuit models a LiFePO4 cell voltage.

Based off of the model described in:

Liao Chenglin; Li Huiju; Wang Lifang, "A dynamic equivalent circuit model of LiFePO4 cathode material for lithium ion batteries on hybrid electric vehicles," Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE , vol., no., pp.1662,1665, 7-10 Sept. 2009

doi: 10.1109/VPPC.2009.5289681

This is a model that describes the relationship between open circuit voltage and the state of charge of a battery under different temperatures. A net list to describe the different chemical, electrical, and mechanical components of the system are under the component "Battery_Pack". Input from a supplemental Excel Spreadsheet (provided upon request) can be implemented into the model to characterize the behavior of Market EV's for simulation purposes. Heat sinks are included in the circuit model for the Pack, Stack, and Cell to help provide accuracy for heat generation rates. The Tafel Equation (derived from Buttler-Volmer) is implemented to more accurately model the mass transport, ohmic, and polarization losses in the polarization curve.