Wireless Battery Charging System Having Emergency Shutdown For A Traction Battery Of An Electric Vehicle
First Claim
1. A vehicle-side, electronic charging system device of a wireless battery charging system, the vehicle-side, electronic charging system device being configured to receive, convert, and feed energy to a rechargeable traction battery for supplying electrical energy to an electric traction motor of an electric vehicle, wherein the traction battery is configured to be charged by an external charging system device via a wireless link and the vehicle-side charging system device, and wherein the vehicle-side charging system device comprises:
- a first LC resonant circuit comprising;
a first coil in the form of a reception coil configured to receive electromagnetic energy and having a first connection and a second connection,a first capacitor,a first output port, anda second output port,wherein the first output port is electrically conductively connected to the second output port via the first capacitor and the first coil, anda current rectifier having a first AC voltage input and a second AC voltage input on an input side of the current rectifier, and a first DC voltage output and a second DC voltage output on an output side of the current rectifier,wherein the current rectifier is designed to convert an AC electric voltage applied between the first and second AC voltage inputs into a DC electric voltage which between the first and second DC voltage outputs,wherein the first AC voltage input is directly or indirectly electrically conductively connectable to the first capacitor via the first output port, and the second AC voltage input is directly or indirectly electrically conductively connectable to the first coil via the second output port,wherein the first DC voltage output is directly or indirectly electrically conductively connectable to a first port of the traction battery, and the second DC voltage output is directly or indirectly electrically conductively connectable to a second port of the traction battery, andwherein at least one of the following pairs of elements are electrically conductively connectable switchably to one another via an actuable switch of a kill switch;
(i) the first and second DC voltage outputs of the current rectifier,(ii) the first and second AC voltage inputs of the current rectifier,(iii) the first and the second output ports of the first LC resonant circuit, or(iv) the first and the second connections of the first coil.
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Accused Products
Abstract
A vehicle-side, electronic charging device of a wireless battery charging system receives, converts and feeds energy into a rechargeable traction battery of an electric vehicle traction motor. The traction battery is charged by an external charging system via a wireless link and the vehicle-side charging device. The vehicle-side charging device includes a first LC resonant circuit between first and second output ports, and a current rectifier having first and second AC voltage inputs and first and second DC voltage outputs. Either (i) the first and second DC voltage outputs of the current rectifier, or (ii) the first and second AC voltage inputs of the current rectifier, or (iii) the first and the second output ports of the first LC resonant circuit, or (iv) a first and a second connection of the reception coil are switchably connected to one another via an actuable kill switch.
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Citations
14 Claims
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1. A vehicle-side, electronic charging system device of a wireless battery charging system, the vehicle-side, electronic charging system device being configured to receive, convert, and feed energy to a rechargeable traction battery for supplying electrical energy to an electric traction motor of an electric vehicle, wherein the traction battery is configured to be charged by an external charging system device via a wireless link and the vehicle-side charging system device, and wherein the vehicle-side charging system device comprises:
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a first LC resonant circuit comprising; a first coil in the form of a reception coil configured to receive electromagnetic energy and having a first connection and a second connection, a first capacitor, a first output port, and a second output port, wherein the first output port is electrically conductively connected to the second output port via the first capacitor and the first coil, and a current rectifier having a first AC voltage input and a second AC voltage input on an input side of the current rectifier, and a first DC voltage output and a second DC voltage output on an output side of the current rectifier, wherein the current rectifier is designed to convert an AC electric voltage applied between the first and second AC voltage inputs into a DC electric voltage which between the first and second DC voltage outputs, wherein the first AC voltage input is directly or indirectly electrically conductively connectable to the first capacitor via the first output port, and the second AC voltage input is directly or indirectly electrically conductively connectable to the first coil via the second output port, wherein the first DC voltage output is directly or indirectly electrically conductively connectable to a first port of the traction battery, and the second DC voltage output is directly or indirectly electrically conductively connectable to a second port of the traction battery, and wherein at least one of the following pairs of elements are electrically conductively connectable switchably to one another via an actuable switch of a kill switch; (i) the first and second DC voltage outputs of the current rectifier, (ii) the first and second AC voltage inputs of the current rectifier, (iii) the first and the second output ports of the first LC resonant circuit, or (iv) the first and the second connections of the first coil. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12)
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4. An electrical rectifier device for use in a vehicle-side charging system device of a wireless battery charging system, wherein the vehicle-side charging system device is configured to receive, convert, and feed energy to a rechargeable traction battery of an electric traction motor of an electric vehicle, wherein the traction battery is configured for electrical charging by an external charging system device via a wireless link and the vehicle-side charging system device using the rectifier device, wherein:
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the rectifier device has a first AC voltage input port and a second AC voltage input port on an input side of the rectifier device, and a first DC voltage output port, a second DC voltage output port, and a current rectifier on an output side of the rectifier device, the current rectifier has a first AC voltage input and a second AC voltage input on the input side, and a first DC voltage output and a second DC voltage output on the output side, the current rectifier is configured to convert an AC electric voltage applied between the first and second AC voltage inputs to a DC electric voltage between the first and second DC voltage outputs, the first AC voltage input port is electrically conductively connected to the first AC voltage input of the current rectifier, and the second AC voltage input port is electrically conductively connected to the second AC voltage input of the current rectifier, and the first DC voltage output port is electrically conductively connected to the first DC voltage output of the current rectifier, and the second DC voltage output port is electrically conductively connected to the second DC voltage output of the current rectifier, and at least one of the following pairs of elements are electrically conductively connectable switchably to one another via an actuable switch of a kill switch; (i) the first and the second DC voltage outputs of the current rectifier, or (ii) the first and second AC voltage inputs of the current rectifier.
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13. A stationary charging system device of a wireless battery charging system, wherein said stationary charging system device is configured to transmit energy to a vehicle-side, electronic charging system device for charging a traction battery of an electric vehicle, wherein the stationary charging system device is configured to:
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receive a request signal output by the vehicle-side charging system device, evaluate a state of the request signal, and after a time after which the state of the signal can be interpreted as a request to the stationary charging system device to terminate a charging operation, terminate a charging operation by ending a transmission of energy within a predetermined period of time and outputting a confirmation signal indicative of termination of the charging operation. - View Dependent Claims (14)
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Specification