GAIA Li-Ion Batteries: Evolution or Revolution? - ExtraEnergy.org

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Proprietary Information, November,2005 Justification for the Battery Management System The recommended battery charging method is IUcharging (const. current, const. voltage) But: • In a serial string the charger can not control individual cell voltages. • Li-Ion cells do not tolerate overcharging with “elevated” voltages for balancing the cells (e.g. “float or boost charging”) • Abuse or operation out of range could result in safety issues by thermal runaway Li-Ion Batteries require a battery management system (BMS) or an electronic protection circuit
Proprietary Information, November,2005 Block Diagram of BMS SOC SOH Data acquisition U I T R Energy management Safety management Thermal management Fan, etc.. Comm. unit Contactor Battery CAN Load & Charger
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Page 3 and 4: Company Overview
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Page 13 and 14: Manufacturing Process
Page 17 and 18: GAIA Product Portfolio
Page 21 and 22: GAIA Markets
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Page 41 and 42: 288V Hybrid Electrical Vehicle Batt
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GAIA Li-Ion Batteries: Evolution or Revolution? - ExtraEnergy.org

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