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EBaM : an E DA tool for Ba ttery M odeling

EBaM : an E DA tool for Ba ttery M odeling. POLITO. Outline. …Energy efficiency is often centered around the “device” …But overall efficiency can be decided in other parts of the “energy path”. MPPT & control. DC-DC converter/ charger. Energy source. DC-DC converter. I, V.

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EBaM : an E DA tool for Ba ttery M odeling

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  1. EBaM:an EDA tool for Battery Modeling POLITO

  2. Outline …Energy efficiency is often centered around the “device” …But overall efficiency can be decided in other parts of the “energy path” MPPT & control DC-DCconverter/charger Energy source DC-DCconverter I, V Energy storage device (ESD) load (Optional) t

  3. Automation for battery modeling Many battery models, with different complexities, are proposed in literature. Limitations: • Costs & Time: calculation of model parameters is based on actual measurements • Lack of generality: a given circuit/model cannot be used to represent another device, i.e., validation is carried out on the specific battery under measure Solution: • Modeling from datasheet: resort to information available in the datasheets provided by the battery manufacturers; • Variable accuracy model templates: since datasheets often provide limited info, adapt the model template (accuracy) to the amount of information.

  4. EBaM Framework

  5. Battery Models should include...

  6. Model levels overview HIGHER ACCURACY

  7. Level 1 model • battery runtime; • temperature effects; • possibility to further extend it • for capacity fade.

  8. Level 2 model Equivalent electric circuit model • battery runtime; • SOC-OCV relation; • temperature effects; • possibility to extend it • for capacity fade.

  9. Level 3 model • battery runtime; • SOC-OCV relation (transient); • temperature effects; • possibility to extend it • for capacity fade.

  10. Accuracy Level 2 Sony UP383562 Level 3 constantcurrent @0.0008C 2s @0.1C Energizer CR2032

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