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Electrical Mobility 10



The corner of a battery box made of steel. The red color indicates high-strength sheet. Wide edges and bars protect the batteries.

Somehow, it is sad that the second best solution always comes. Like the VW beetle, which the much better constructed Opel Kadett could not replace. Now it happens again. Since BMW, who have always constructed cars looking all the same from below at least for years, has finally done a heroic step and now the pullback.

The future i3 will no longer exist in this form. Finish with an unladen weight comparable to a car with combustion engine. There will be no more specifical designe for elecrically operated cars. And do you know what that looks like? Here are the specifications for the battery box: 150 kg plus cooling including any battery.

German manufacturers do not build batteries, but unnecessarily big and heavy battery boxes.

Why, because there exist specifications, a kind of crashtest regulations for battery boxes. They must not only be able to withstand front and side impacts, but even the corresponding deliberate damage from below. And then they are put into vehicles, where such specifications have long been established.

You do not have to wonder about seat height, space consumption and kerb weight of electric cars. On the other hand, the battery weight hardly appears to be noticeable. We do not have a battery problem but a regulatory problem. The smooth solution is always taken, difficulties set aside. Why can not such a highly developed industry master even small threads, thinner than a human hair, in spite of manufacturing technology so that the costs are capped?

Other than e.g. with rare earths or cobalt, there is obviously no problem with raw materials. No, it only would take much more brainwashing from technicians. Perhaps initially not financially attractive, but promissing a greater range through less weight and a gain in safety, see formula 1.

Here the base assembly of a smart with combustion engine . . .


The battery is installed together with the box . . .

The smart electric weighs 200 kg more despite a considerably lighter drive and a lack of tank and only 17.6 kWh.

In the next four years Tesla promises batteries with 0.5 kg/kW. Assumed that only half of this is possible now, the smart battery weighs only 70 kg. So if one were to take more trouble with the design and purchase the right batteries, one could already offer a much lighter smart and in four years even one, which would not be heavier than the one with a combustion and much lighter with a carbon version. 09/17





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