As part of Lacoste Motion, we have co-developed the INFINI-T collection. These innovative backpack and bum bag are integrating a system which combines two complementary technologies : wireless charging (which is made possible thanks to electromagnetic induction), and photovoltaics (in order to make the device energy-efficient).
The whole set was thought in a modular approach, to keep it smart in case of technical support, to facilitate recycling but also to let the user choose whether he wants to use/carry the device or not, according to his needs.
Step 1 – Proof of concept
A first functional prototype of the module was assembled in order to test the system at the lowest price possible. Technical options were settled, such as battery capacity, charging port, dimensions, types of photovoltaic cells, etc.
Then, a testing phase was undergone in real-life conditions to validate the different functionalities as well as the relevance of the selected technologies.
Step 2 – Prototyping
Designing the module in order to make each part work together was a technical and challenging part. First, a particular casing was developed using CNC prototyping. We needed it to integrate both technologies (the solar panel, which must appear on the outside of the bag) and the electromagnetic induction charging system (which shall release the energy inwards). Then, a section of flexible plastic (TPU) was designed to protect the electronics and facilitate the assembly on production lines. The choice of this material was made because of its ability to be easily perforated by leather stitching needles and thermoformed on the ABS+PC casing for waterproofing requests. Finally, a front pocket was added so that a phone could be stowed against the induction system, as well as some rubber points, in order to help positioning the phone and avoid slipping.