As­sault on bat­tery

The chem­istry of a brand new bat­tery makes it lighter, more ver­sa­tile and longer last­ing than its lead-acid cousin.

Element - - Clean technology -

The Clean En­ergy Expo held in Taupo dur­ing the mid­dle of Oc­to­ber was the ap­pro­pri­ate set­ting for the New Zealand un­veil­ing of a bat­tery stor­age sys­tem that might see the tra­di­tional lead-acid mod­els con­signed to his­tory. De­vel­oped by Aus­tralian com­pany Red­flow, the bat­ter­ies are based on high per­for­mance zinc bromine elec­tro-chem­istry and could rev­o­lu­tionise the mar­ket. The zinc-bromine bat­ter­ies weigh less than 20% of the equiv­a­lent lead-acid bat­tery. But the most at­trac­tive fea­ture of the de­vices is that they are de­signed to han­dle both 100% dis­charges and par­tial dis­charges (as op­posed to a lead-acid bat­tery which must be kept topped up). There is also no re­quire­ment for com­plete recharges af­ter each dis­charge, as there is with a lead-acid model. The com­pany boasts of the low op­er­at­ing costs and the long life of the bat­ter­ies, with no ex­piry date or shelf life. Test­ing of the bat­ter­ies to date has demon­strated well over 1000 full depth of dis­charge cy­cles. There is a war­ranty, how­ever, which gives a guar­an­teed five years of life. The zinc-bromine mod­ule is an all-plas­tic con­struc­tion with no heavy metal (lead, mer­cury, cad­mium) con­tent. All com­po­nents, in­clud­ing the elec­trolyte, can be cost ef­fec­tively 100% re­cy­cled. De­signed for both in­dus­trial and house­hold use, the bat­ter­ies will be sold in New Zealand by Pow­erco. For more

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