Coil unit and electric vehicle
First Claim
1. A device for inductive transfer of electrical energy between an electric vehicle and a charging coil, comprising:
- at least one coil; and
a flux guide unit for guidance of a magnetic flux appearing during the operation of the coil, wherein the flux guide unit has material weaknesses configured, completely or partially, as predetermined breaking points, the material weaknesses extending in a plane of the flux guide unit that is parallel to the longitudinal direction of the vehicle and at an inclined angle relative to the plane.
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Accused Products
Abstract
A coil unit for an electric vehicle for the inductive transfer of electrical energy between the coil unit and a stationary charging station. The coil unit includes at least one coil and a flux guide unit for guiding a magnetic flux occurring during operation of the coil. Also disclosed is an electric vehicle having a coil unit for the inductive transfer of electrical energy between a secondary coil of the coil unit and a primary coil of a charging station. The disclosed coil solves the problem of allowing the safe use of the inductive electrical energy transfer in electric vehicles, in particular motor vehicles, by proposing a coil unit, in which the flux guide unit has material weakenings, and an electric vehicle having such a coil unit.
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Citations
20 Claims
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1. A device for inductive transfer of electrical energy between an electric vehicle and a charging coil, comprising:
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at least one coil; and a flux guide unit for guidance of a magnetic flux appearing during the operation of the coil, wherein the flux guide unit has material weaknesses configured, completely or partially, as predetermined breaking points, the material weaknesses extending in a plane of the flux guide unit that is parallel to the longitudinal direction of the vehicle and at an inclined angle relative to the plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19, 20)
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12. A device for inductive transfer of electrical energy between an electric vehicle and a stationary charging station, comprising:
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at least one coil; and a flux guide unit positioned proximate the coil for guidance of a magnetic flux arising during the operation of the coil, the flux guide unit having a plurality of predetermined material weaknesses as paths extending along the flux guide unit, the paths disposed at an angle with respect to a planar surface of the flux guide unit, each path formed as at least one of a gap or weaker material relative to adjacent material of the flux guide unit, the paths sized and dimensioned to cause the flux guide unit to break free a substantial portion of the flux guide that is bounded by at least one of the weakened paths and to to guide the portion along the angled path to eject the portion away from a passenger compartment of the electric vehicle during an impact accident of the electrical vehicle to thereby reduce movement inertia of the flux guide and to thereby safeguard passengers of the electric vehicle from intrusion of the flux guide unit into the passenger compartment. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of fabricating a flux guide unit for guidance of a magnetic flux during the operation of a coil aboard a moving electric vehicle obtaining power from a stationary power source, the method comprising:
forming a plurality of predetermined material weakness as paths extending along the flux guide unit, each path formed as at least one of a gap or weaker material relative to adjacent material of the flux guide unit, the paths sized and dimensioned and disposed at an angle relative to a longitudinal plane of the flux guide unit surface to cause the flux guide unit to break into portions and to cause at least one of the portions to break free and to be guided by the angled path to be thereby ejected in a direction away from the passenger compartment during an impact accident of the electrical vehicle to thereby reduce movement inertia of the flux guide and avoid intrusion of portions of the flux guide unit into the passenger compartment.
Specification