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Description

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. 2009doi: 10.1109/VPPC.2009.5289681This 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.

SoC-Voc Temp Dependent Model

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

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. 2009doi: 10.1109/VPPC.2009.5289681This 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.

SoC-Voc Temp Dependent Model

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

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. 2009doi: 10.1109/VPPC.2009.5289681This 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.

SoC-Voc Temp Dependent Model

Darrell
Designer10

Darrell

Member for

11 years

624

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10

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Big fan of VHDL-AMS

Description

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. 2009doi: 10.1109/VPPC.2009.5289681This 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.

Battery Discharge and rebound

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

LiFePO4 battery cell

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

test Li battery

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

SoC-Voc Temp Dependent Model

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

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. 2009doi: 10.1109/VPPC.2009.5289681This 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.

LiFePO4 battery cell

Mason Adams
Designer209116

Mason Adams

Member for

5 years 10 months

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Description

Ember coffee mug control system heating element

Jleboi
Designer216469

Jleboi

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5 years 6 months

9

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Description

This is a model of an Ember coffee mug -- a battery-powered, state-of-the-art beverage container that controls the temperature of your beverage to keep it at the setpoint you specify for a couple of hours.See https://ember.com/This model simulates the process of filling the mug with a hot liquid and maintaining it at the setpoint until the battery is exhausted. This model includes modeling of the PCM (Phase Change Material). From the measurements used to characterize the actual device, it appears that the PCM contains multiple melting-point materials (see experimental results here: https://www.systemvision.com/design/ember-coffee-mug-2-pcm-experimental-data-0), thus two were included –at melting points of 47C and 52C respectively. The thermal mass of the liquid is modeled by the block with a “coffee cup” symbol. The feedback control is simple proportional gain. The battery is Li-Ion chemistry with a capacity calibrated from measurements on the real-life temperature profile over time – estimated as 5 cells in series (total ~17 V), since the charger voltage was just under 20 V, with 130 milliamp-hour capacity each, for a total of 650 milliamp-hours capacity.The red wires are thermal, with temperature as the across variable and heat flow as the conserved through variable. Black wires are electrical, with voltage as the across variable and current as the conserved through variable. The green wires are directional control signals (modeling the control system variables). The block labeled “Temp” models the temperature sensor, feeding back the temperature to the proportional controller. The block on the far-left in the setpoint, with a step-input from ambient to the desired beverage temperature.