Inductive Charging Increases Productivity of AGVs

A recent study by MHP – A Porsche Company in collaboration with PohlCon impressively demonstrates how the use of inductive charging can increase the productivity of automated guided vehicles (AGVs) in logistics by up to 50 percent. These results underline the transformative effect of this technology on increasing efficiency in modern production logistics.

As automation in production logistics progresses, companies are faced with the challenge of maximizing the efficiency of AGVs. Until now, these systems have often been charged in separate charging zones, which leads to unproductive downtimes. The aim of the MHP study was to demonstrate the advantages of process-integrated charging points using inductive point charging systems such as Wiferion over conventional charging zones using a real-life optimization scenario in a medium-sized production company.

The study compared two charging strategies: a traditional variant with separate charging zones and an innovative method in which charging points were integrated directly into the production process. The result was clear: in-process charging increased the productivity of the AGV fleet by an impressive 50%. A second scenario assumed a constant throughput. Here, the fleet size was reduced by 30%, resulting in significant cost savings.

For companies, this means a significant increase in production efficiency, a drastic reduction in operating costs and optimized use of space – decisive competitive advantages in an increasingly automated environment. The simulation showed that in-process charging can save 30 m² of floor space originally blocked by charging areas and convert it into storage space. In the specific case study, a high-bay warehouse with approx. 290 m² of storage space can now be built.

With the introduction of wireless charging technology, companies can reduce their vehicle fleet, optimize the use of their resources and at the same time increase safety in the workplace by minimizing unnecessary traffic and cross-contact. The charging strategy saves 1,300 km of travel each year, avoids more than 5,000 hours of downtime due to charging breaks and prevents 10,900 cross-contacts between employees and vehicles.

“The study by MHP and PohlCon provides convincing evidence that wireless charging is not just a technological gimmick, but a real efficiency driver in modern production logistics,” says Julian Seume, Director of Wiferion – a PULS business unit, commenting the results. “Companies that implement this ground-breaking technology not only secure immediate productivity gains and cost reductions, but also position themselves as pioneers in the next wave of automation.”

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HUBTEX and INTIS launch inductive charging system

Choice of charging technology is key to the efficient use of Automated Guided Vehicles (AGVs) in intralogistics. The aim is to supply the vehicle with energy as quickly and cost-effectively as possible, while maximising the internal material flow. To achieve this, HUBTEX is forming a partnership with INTIS.

HUBTEX was responsible for introducing the PhoeniX AGV – the world’s first fully automated electric multidirectional sideloader for handling long, heavy and bulky goods. Now, thanks to an inductive charging system from INTIS, the vehicle’s 48V lithium-ion battery can be supplied with a charging current of 400A contactlessly and wirelessly. The same concept can then be transferred to all HUBTEX vehicles with electric drives.

As the requirements in intralogistics become ever more complex, energy management is increasingly used to save time and money. It has become clear that the only way to make your AGV solution as economical as possible is to choose an optimal charging system. In HUBTEX’s experience, stationary cable charging is not the best long-term solution due to the amount of time and space required. Manual charging is certainly the most economical solution, but it relies heavily on the employees.

Swapping the battery for a replacement, on the other hand, takes far less time but requires an appropriate charging infrastructure and skilled personnel. Another option is an automated battery changing station, which can, in many cases, reduce the number of vehicles required, but must be taken into account in the layout and design.

HUBTEX therefore believes that inductive battery charging for AGVs is the best way forward. In its chosen solution, charging pads on the vehicle automatically interact with charging plates on the floor or on the walls as soon as the vehicle is positioned accordingly.

Inductive charging

“By partnering with INTIS, a specialist in inductive charging technology, we are investing in a completely autonomous concept that we believe works best with a combination of lithium-ion batteries and an inductive battery charging system,” explains Michael Röbig, an expert in energy management at HUBTEX.

“In the past, maximum charge power was primarily achieved with cable-based charging equipment. Now we have inductive rapid charging systems, which can charge the vehicles quickly and ensure high availability thanks to the high charging currents.”

The compact charging station can be placed in the respective warehouse or production environment, where the users can take advantage of production-related downtimes for charging purposes, for example. The user has constant access to data such as capacity, status and charging time. Furthermore, inductive charging is maintenance-free, less susceptible to vandalism and, thanks to the smaller lithium-ion batteries, conserves resources. It also requires less time and effort than powering the vehicles using charging stations.

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