Induction charging device for inductively transmitting energy to an induction rechargeable battery device, and method for inductively charging an induction rechargeable battery device

US10491044B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Bernd Wirnitzer · Echterdingen, DE
• Dragan Krupezevic · Stuttgart, DE
• Guenter Lohr · Echterdingen, DE
• Juergen Mack · Göppingen, DE
• Martin Gonda · Stuttgart, DE

Key dates

• Filing date: Jun 9, 2016
• Grant date: Nov 26, 2019
• Expiry date: Oct 3, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B70/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An induction charging device and a method for inductively transmitting energy to an induction rechargeable battery device, with at least one primary oscillating circuit that includes at least one charging coil, and with a control/regulation unit for controlling the primary oscillating circuit with an inverter circuit. An excitation frequency of an output signal of the inverter circuit made up of half-waves essentially corresponds to a resonant frequency of the primary oscillating circuit. The induction charging device provides that, for reducing a charging current, the control/regulation unit, after an end-of-charge voltage of the induction rechargeable battery device is reached, controls the inverter circuit so that the output signal periodically sets at least one first half-wave to a high value, and an odd plurality of successive half-waves is then immediately set to a value that is low compared to the high value.