Inductive charging device

• US 10,090,708 B2
• Filed: 11/27/2014
• Issued: 10/02/2018
• Est. Priority Date: 12/17/2013
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Rejman, Marcin, Gonda, Martin, Lohr, Guenter, Mack, Juergen, Krupezevic, Dragan
• Primary Examiner(s): Deberadinis, Robert
• Application Number:
  US15/105,534
• Publication Number:
  US 20160322856A1
• Time in Patent Office: 1,405 Days
• CPC Class Codes: H02J 50/00 Circuit arrangements or systems for wireless supply or distribution of electric power
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

An inductive charging device, in particular a handheld power tool inductive charging device, having a housing, a receptacle region for accommodating an induction accumulator, a coil unit that includes at least one core element and at least one induction coil that at least partly encloses the at least one core element, and at least one coil housing element that positions at least the coil unit relative to the receptacle region in the housing.

Claims

1. A handheld power tool inductive charging device, comprising:

a housing;

a receptacle region for accommodating an induction accumulator;

a coil unit situated in the housing, the coil unit including at least one core element and at least one induction coil that at least partly encloses the at least one core element; and

a first coil housing element that positions at least the coil unit relative to the receptacle region in the housing.

2. The inductive charging device as recited in claim 1, wherein the first coil housing element has at least one opening for accommodating the at least one induction coil.

3. The inductive charging device as recited in claim 1, wherein the first coil housing element has at least one receptacle region for accommodating the at least one core element.

4. The inductive charging device as recited in claim 1, wherein the first coil housing element has at least one holding element for detachable fastening to the housing.

5. The inductive charging device as recited in claim 1, further comprising:

a second coil housing element that forms with the first coil housing element a coil housing unit.

6. The inductive charging device as recited in claim 5, wherein the coil housing unit includes at least one connecting element that detachably connects the first coil housing element and the second coil housing element to one another in an assembled state.

7. The inductive charging device as recited in claim 6, wherein the connecting element is fashioned as a locking element.

8. The inductive charging device as recited in claim 5, further comprising:

at least one spring element that is at least partly provided to apply a force to the at least one core element acting at least partly toward the at least one induction coil.

9. The inductive charging device as recited in claim 8, wherein the at least one spring element exerts a force in a direction of the receptacle region on the at least one core element.

10. The inductive charging device as recited in claim 8, wherein the at least one spring element and at least one of the first and second coil housing elements work together in such a way that the at least one core element is pre-tensioned toward the at least one induction coil.

11. The inductive charging device as recited in claim 10, wherein at least one of the first and second coil housing elements includes the at least one spring element.

12. The inductive charging device as recited in claim 11, wherein the at least one spring element is fixedly connected to at least one of the first and second coil housing elements.

13. The inductive charging device as recited in claim 11, wherein the at least one spring element is fashioned in one piece with at least one of the first and second coil housing elements.

14. The inductive charging device as recited in claim 1, wherein the coil unit has a plurality of core elements, identical in shape, and a plurality of spring elements, identical in shape, are provided which respectively apply a force to one of the core elements acting at least partly toward the at least one induction coil.

15. The inductive charging device as recited in claim 1, wherein the at least one induction coil includes at least two coil terminals that are situated at a distance from one another.

16. The inductive charging device as recited in claim 1, further comprising:

a shielding element is provided that is fashioned to reduce electromagnetic interference.

17. The inductive charging device as recited in claim 16, wherein the shielding element is situated between the receptacle region and the induction coil.

18. The inductive charging device as recited in claim 16, wherein the shielding element is situated between the receptacle region and the first coil housing element.

19. The inductive charging device as recited in claim 16, further comprising:

a further shielding element is provided that is fashioned to reduce electromagnetic interference.

20. The inductive charging device as recited in claim 19, wherein the further shielding element is situated between the housing element and the induction coil.

21. The inductive charging device as recited in claim 19, wherein the further shielding element is situated between the housing element and the first coil housing element.

22. A system, comprising:

an inductive charging device, including;

a housing,

a receptacle region for accommodating an induction accumulator,

a coil unit situated in the housing, the coil unit including at least one core element and at least one induction coil that at least partly encloses the at least one core element, and

a first coil housing element that positions at least the coil unit relative to the receptacle region in the housing; and

a handheld power tool induction accumulator.