Con esta herramienta te facilitamos un acceso a todas las ofertas y demandas de tecnología europeas y a búsquedas de socios para participar en propuestas europeas de I+D publicadas en la red Enterprise Europe Network, pudiendo filtrar los resultados para facilitar las búsquedas más acordes con tus necesidades.

¿Quieres recibir estos listados de oportunidades de colaboración en tu correo de forma periódica y personalizada? Date de alta en nuestro Boletín

Los términos de búsqueda han de ser en inglés.

Control mechanism to prevent unwanted leakage currents in electric vehicle chargers

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TODE20211126002
Publicado:
07/12/2021
Caducidad:
08/12/2022
Resumen:
A German university has developed a method that reduces the leakage current in transformerless chargers for electrical vehicles. This has been proven to reduce leakage current considerably, even to zero. This invention could be utilised in all battery-based electric vehicles, whether all-electric or plug-in hybrid. Licensees are sought. A technical co-operation agreement is also offered.

Details

Tittle:
Control mechanism to prevent unwanted leakage currents in electric vehicle chargers
Summary:
A German university has developed a method that reduces the leakage current in transformerless chargers for electrical vehicles. This has been proven to reduce leakage current considerably, even to zero. This invention could be utilised in all battery-based electric vehicles, whether all-electric or plug-in hybrid. Licensees are sought. A technical co-operation agreement is also offered.
Description:
The number of electric vehicles that are being registered is increasing significantly each year. The efficient charging of the drive battery is a key technology for the continued success of electric vehicles on the market. In this context, attention has recently turned to transformerless on-board charger concepts. Given the known and considerable leakage capacitance of the battery and the connected high-voltage system, special care must be taken with transformerless chargers to ensure that high leakage current is not generated to ground and through the protective earth (PE) conductor.

The patent-pending invention from a German university uses a method that does without an additional compensation circuit for leakage current, instead using the charger´s inherent DC-DC (direct current) stage that connects its link to the battery (see figure). This DC-DC stage makes it possible to effectively compensate for low-frequency pulsating battery potentials and the resulting unwanted leakage current, such as those that occur particularly with transformerless on-board chargers for electric vehicles on various AC (alternating current) grids. This has been proven to reduce leakage current considerably, even to zero.
All battery-based electric vehicles, whether all-electric or plug-in hybrid, could utilize this circuit in the future with a suitable control mechanism.

The German university offers interested companies the opportunity to license and continue to develop this technology with the inventors. The invention is directed to automobile manufacturers or their suppliers and to battery manufacturers who would like to make use of the technology.
Advantages and Innovations:
The patent-pending invention from a German university uses a method that works without an additional compensation circuit for leakage current, instead using the charger´s inherent DC-DC (direct current) stage that connects its link to the battery (see figure).

The following advantages result from this invention:
· Simpler circuit concept
· No additional components
· Compatible with international AC grids (1AC, 2AC, 3AC)
· Excellent leakage current reduction
Stage of Development:
Field tested/evaluated
IPs:
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
An application has been submitted to the German Patent and Trademark Office, with subsequent applications in other countries possible in the priority year.

Partner sought

Type and Role of Partner Sought:
All battery-based electric vehicles, whether all-electric or plug-in hybrid, could benefit from this circuit in the future with a suitable control mechanism. All major car manufacturers and charging component suppliers are currently working on efficient charging concepts for electric vehicles in order to reduce charging time and costs (in material and electrical operating losses) and to increase range by, e.g., reducing weight.

The German university offers interested companies the opportunity to license and implement the technology in products and processes and to continue to develop this technology with the inventors.

Together with the inventors from the university, the technology can be further developed to increase the Technology Readiness Level (TRL currently 3) or the technology can be adapted to the product needs of the cooperation partner.

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
German

Keywords

Technology Keywords:
02009016 Charging system
01002003 Electronic engineering
02009002 Hybrid and Electric Vehicles
02009026 Sistemas de suministro de energía
04001003 Storage of electricity, batteries