Biomimicry– make it easier for E-Cars

The underside of the lily pad gives the plant structural stability and buoyancy. These properties can be used to make battery boxes for electric cars lighter and even to integrate cooling ducts in them.

This project idea is about reducing the weight of battery boxes in e-cars. The weight and range of cars are closely related to each other. So are the pollutant emissions. The battery plays a major role in this. The battery box and the base plate on which the battery is mounted currently consist of solid metal plates.


This is what the original looks like in the ID.4 from VW. A technically successful implementation of the battery box on the current state of the art

Image source: VW VW

Battery box

This is what the weight-optimised battery could look like according to a bionic design study by SinusPro.

This opens up a potential for saving weight. For in nature there are some approaches to solving the technical problem of making flat structures stable and as light as possible. The giant water lily Victoria Amazonica has particularly large leaves that can even support a human being. The underside of the leaf has a special, branched stabilising structure. This structure gives the water lily a very high surface load-bearing capacity with a low material input. In addition, the support structures are hollow, so they give the plant buoyancy.

The underside of the battery boxes is to be designed according to this principle. On the one hand, the hollow channels provide stability and on the other hand, a coolant can run through there to cool the battery at the same time. This approach combines the principle of lightweight construction with that of functional integration.