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From SeattleEVA
Revision as of 11:03, 17 February 2006 by Rjf (talk | contribs) (→‎Flow batteries: evdl link)
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NiMH & NiCd

Li-ion & Li-Poly

Primary (Disposable)

Secondary (Rechargeable)

Traction batteries

Traction batteries (secondary batteries or accumulators) are designed to provide power to move a vehicle, such as an electric car or tow motor. To prevent spilling, the electrolyte in some traction batteries is gelled. The electrolyte may also be embedded in a glass wool which is wound so that the cells have a round cross-sectional area (AGM-type). The following types are also in use[1]:

  • Zebra NiNaCl (or NaNiCl) battery operating at 270 °C requiring cooling in case of temperature excursions
  • NiZn battery (higher cell voltage 1.6 V and thus 25% increased specific energy, very short lifespan)

Lithium-ion batteries are now pushing out NiMh-technology in the sector while for low investment costs the lead-acid technology remains in the leading role[2].

Flow batteries

Flow batteries are a special class of battery where additional quantities of electrolyte are stored outside the main power cell of the battery, and circulated through it by pumps or by movement. Flow batteries can have extremely large capacities and are used in marine applications and are gaining populatity in grid energy storage applications. EVDL_Maillist:2006./2./1016