Power storage systems
- 1. Presented by: Jha Ashish Maniyar Siddharth Nagalla Bhanu Pradeep, Nandimalla Prashanth Dilip Kumar Vaggam Singwala Sunil Power Storage Systems
- 2. Contents Overview – Common storage systems Storage systems – Lead-acid & Lithium-ion Energy demand (Single family) Features & Costs of battery storage system Performance & Life cycle Recomendations References
- 3. Overview - Common storage systems
- 4. Storage systems Lead-acid: • Today already high number of items • Inherent safety by controlled overcharge reaction • No complex cell management needed • Experience with large storage • Relatively low initial investment • Limited cycle life Applications: Residential storage systems, Uninterruptible power supply
- 5. Lithium-ion: • High efficiency, production cost, & energy density • Long lifetime • Low maintenance & self discharge rate • Light weight • Quick charging (typically 1-2 hours) Applications: Residential, automotive, uninterruptable power supply system Storage systems
- 6. Energy demand (Single family) Average annual power consumption of single family is 4MW which requires 15Kw capacity battery (optimal) or 30Kw capacity battery (bad conditions) Consumption per year = 4MW Consumption per day = 10-12 Kwh
- 7. Features & Costs of battery storage systems Source: Hoppecke Lead battery Lithium battery • Energy content (kWh) 5.5 – 22.0 • Rated voltage (V) 24 and 48 • 2,500 cycles at 50% discharge depth – service life of design of 10 years (at 20°C) • Maintenance-free €3100 • Energy content (kWh) 5 – 30 • Rated voltage (V) 51.2 • Durability at discharge depths of up to 80% max. 7,000 cycles • Service life upto 20 years • High level of efficiency €3500
- 8. Performance & Life cycle Parameters Lead-acid Lithium-ion Energy density 50 Wh/l to 130 Wh/l 250 Wh/ l to 550 Wh/ l Power density 10 W/l to 1000W/l 100 W/l to 5000W/l Depth of discharge 80 % Up to 100 % Self discharge 0.05 % to 0.2 % per day 1 % per month Round trip efficiency 78 % to 85 % 85 % to 92 % Cycle life 1500 to 5000 3,000 to 10,000 (full cycles) Calendar life 10 years to 20 years (depending on temperature and SOC) 10 years to 30 years (depending on temperature and SOC)
- 9. Aspects to be addressed by R&D Advancement has to done in fast charging Increasing of Power and Energy densities Decreasing of charge-discharge cycle time Ensuring safe and secured operation Cost reduction
- 10. References www.hoppecke.com perspectives of electricity storage technologies by Smart Energy for Europe Platform GmbH (SEFEP) Battery Types and Characteristics for HEV Thermo Analytics, Inc.,2007. Retrieved June 11th, 2010.
- 11. Thank you !