Tommy Hjelle

Title: The Innovative Contributions of Tommy Hjelle

Introduction

Tommy Hjelle is a notable inventor based in Torslanda, Sweden. He has made significant contributions to the field of energy storage systems, holding a total of five patents. His work focuses on enhancing the efficiency and reliability of energy storage devices, particularly in hybrid electric vehicles.

Latest Patents

One of Hjelle's latest patents is a method for reducing wear of an energy storage device. This invention relates to a method for minimizing wear in an energy storage system connected to a load, which comprises at least two energy storage devices. The method involves connecting the energy storage system to an electrical energy source and powering the load through the energy storage system by selectively connecting one of the energy storage devices while disconnecting another to prevent energy transfer.

Another significant patent is a device and method for enabling state of charge (SOC) calibration in an electrical energy storage system of a hybrid electric vehicle. This device initiates the charging of a battery cell to a first voltage level using an electric machine powered by a combustion engine. It detects when the first voltage level is reached, stops fuel injection to the combustion engine, and then initiates discharging of the battery cell to a second voltage level. SOC estimation is enabled once the second voltage level is reached.

Career Highlights

Throughout his career, Tommy Hjelle has worked with prominent companies such as Volvo Truck Corporation and Volvo Technology Corporation. His experience in these organizations has allowed him to develop innovative solutions that address the challenges faced in energy storage technologies.

Collaborations

Tommy has collaborated with several professionals in his field, including Jerker Lennevi and Simon Brunet. These collaborations have contributed to the advancement of his projects and the successful development of his patents.

Conclusion

Tommy Hjelle's contributions to energy storage technology are noteworthy, as evidenced by his innovative patents and career achievements. His work continues to influence the development of efficient energy systems in hybrid vehicles and beyond.