Star­tups SAX Pow­er and Com­meo are win­ners of the ees AWARD 2021

An AC bat­tery with inte­grat­ed DC/AC con­vert­er and bat­tery man­age­ment sys­tem, ener­gy stor­age solu­tions for 48 volt and high volt­age appli­ca­tions as well as the bat­tery stor­age solu­tion “Encharge” are among the most inno­v­a­tive prod­ucts in the field of bat­ter­ies and ener­gy stor­age — and are the win­ners of the ees AWARD 2021.

SAX Pow­er: Dig­i­tal AC bat­tery for ener­gy stor­age and e‑mobility

After SAX, a long-time sup­pli­er to Deutsche Bahn, devel­oped lithi­um-ion bat­tery stor­age tech­nol­o­gy, SAX Pow­er was found­ed in 2019. SAX Pow­er’s dig­i­tal AC bat­tery fea­tures nov­el elec­tron­ic cir­cuit­ry that con­nects bat­tery cells through cas­cad­ing H‑bridges. These cir­cuits serve as both bat­tery man­age­ment sys­tems (BMS) and DC/AC con­vert­ers. The inno­v­a­tive BMS enables high­er usable capac­i­ty and life­time thanks to opti­mized cell bal­anc­ing, the selec­tion of indi­vid­ual cells to be charged or dis­charged and the abil­i­ty to exclude defec­tive cells. It should be empha­sised that the patent­ed, inte­grat­ed pow­er elec­tron­ics mean that there is no need for an invert­er. The solar stor­age units con­sist of 120 bat­tery cells, each with a nom­i­nal capac­i­ty of 15 ampere-hours and a nom­i­nal volt­age of 3.2 volts, for a total capac­i­ty of 5.8 kilowatt-hours.

The inter­na­tion­al jury of experts agreed on the rev­o­lu­tion­ary aspect of the inte­grat­ed DC/AC con­vert­er and BMS: the sys­tem has a very high con­ver­sion effi­cien­cy and has the poten­tial to sig­nif­i­cant­ly change the design of home bat­tery stor­age sys­tems. The jury was also impressed by the poten­tial for the auto­mo­tive indus­try: as an invert­er is no longer required, safe­ty in e‑mobility is increased and costs are reduced.

Com­meo: ener­gy stor­age solu­tions for 48 volt and high volt­age applications

The com­pa­ny, based in Wal­len­horst near Osnabrück, has been devel­op­ing and pro­duc­ing ener­gy stor­age and ener­gy man­age­ment solu­tions since 2016. Its ener­gy stor­age solu­tions for 48-volt and high-volt­age appli­ca­tions up to 800 volts are scal­able from 1.1 kilo­watt hours to sev­er­al megawatt hours. The high­ly mod­u­lar solu­tion is con­sis­tent­ly geared to the needs of the cus­tomer. The solu­tion com­bines var­i­ous basic com­po­nents: two cell for­mats with pouch and cylin­dri­cal cells, four dif­fer­ent cell types, a con­trol unit and housings.

The jury praised the sys­tem’s mod­u­lar­i­ty and con­fig­u­ra­tion options: up to 400 vari­a­tions, includ­ing high-volt­age appli­ca­tions, are pos­si­ble. Stan­dard­iza­tion, flex­i­bil­i­ty and the abil­i­ty to meet the needs of dif­fer­ent users were also giv­en high marks, as was the use for small or large com­mer­cial appli­ca­tions. Fur­ther plus points: The sys­tem meets all safe­ty stan­dards and can be inte­grat­ed into stan­dard con­trol cab­i­net sys­tems and thus into exist­ing ener­gy infra­struc­tures. Com­meo uses renew­able ener­gy in its production.

The third win­ner is Enphase Ener­gy: “Encharge” robust mod­u­lar stor­age solution

Enphase Ener­gy, head­quar­tered in Cal­i­for­nia, designs and man­u­fac­tures solar pow­er stor­age solu­tions for homes and businesses.