Table 1 Comparison of energy storage technologies
From: E-transportation: the role of embedded systems in electric energy transfer from grid to vehicle
Tech. | Energy density | Power density | Life cycles |
|---|---|---|---|
(Wh/kg) | (W/kg) | ||
Lead-acid | 30–40 | 30–40 | 500–1000 |
NiCd | 40–60 | 100–200 | 1000–2000 |
NiMH | 40–80 | 150–250 | 1000–2000 |
Li-iona | 100–200 | 300–1000 | 1000–7000 |
Ultra-cap. | 5–10 | 1000–5000 | >1,000,000 |