Driven - - Ev News - Image © AUDI SOUTH AFRICA

An ad­vanced ther­mal cool­ing sys­tem that in­cor­po­rates a heat pump will al­low the up­com­ing Audi e-Tron to avoid power fade due to bat­ter­ies that over­heat when the car is driven hard for an ex­tended pe­riod. Audi’s sys­tem is de­signed to keep the 95 kWh bat­tery pack hum­ming com­fort­ably be­tween 25° and 35° Cel­sius at all times, espe­cially dur­ing pe­ri­ods of spir­ited driv­ing.

Ac­cord­ing to Anno Mertens, project direc­tor for charg­ing in­fra­struc­ture at Audi, the ther­mal cool­ing sys­tem will make it pos­si­ble to go pedal to the metal in the Audi e-Tron, over and over again, with­out any drop in per­for­mance, nei­ther at high load, nor over an ex­tended pe­riod.

Fol­low­ing a lad­der frame de­sign lo­cated un­der­neath the bat­tery cells, the cool­ing sys­tem is bonded to the bat­tery cells with a spe­cially de­vel­oped ad­he­sive that al­lows for op­ti­mal ther­mal trans­fer. The alu­minium lad­der seg­ments are filled with gly­col, and a con­ven­tional ra­di­a­tor in the front of the ve­hi­cle cools the fluid, which also ex­plains the tra­di­tional grill on the e-Tron. Sur­plus heat from the cool­ing sys­tem can also be used to heat the in­te­rior of the car, and the heat pump helps to heat the bat­tery pack in cold con­di­tions.

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